(19)
(11)EP 3 367 355 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
02.12.2020 Bulletin 2020/49

(21)Application number: 16857272.5

(22)Date of filing:  04.10.2016
(51)International Patent Classification (IPC): 
F41H 9/08(2006.01)
F42B 12/48(2006.01)
F42B 3/04(2006.01)
G08B 15/02(2006.01)
C06D 3/00(2006.01)
(86)International application number:
PCT/JP2016/079378
(87)International publication number:
WO 2017/068956 (27.04.2017 Gazette  2017/17)

(54)

SMOKE SCREEN GENERATOR

RAUCHWANDGENERATOR

GÉNÉRATEUR D'ÉCRAN DE FUMÉE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 20.10.2015 JP 2015206625

(43)Date of publication of application:
29.08.2018 Bulletin 2018/35

(73)Proprietor: Daicel Corporation
Osaka-shi, Osaka 530-0011 (JP)

(72)Inventors:
  • NAKAHASHI, Katsuhiro
    Tatsuno-shi, Hyogo 671-1681 (JP)
  • KURODA, Takao
    Tatsuno-shi, Hyogo 671-1681 (JP)
  • MIMURA, Atsushi
    Tatsuno-shi, Hyogo 671-1681 (JP)
  • HIGUCHI, Yuji
    Tatsuno-shi, Hyogo 671-1681 (JP)

(74)Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)


(56)References cited: : 
EP-A1- 1 234 732
JP-A- 2015 043 143
US-A- 4 898 098
US-A1- 2014 230 685
WO-A1-2004/097760
US-A- 3 120 183
US-A- 5 700 971
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to a smoke screen generator which is usable in combination with a security apparatus.

    Description of Related Art



    [0002] A smoke screen generator may be mounted to a ceiling, a wall, or the like of a room in order to mentally confuse an intruder breaking and entering a store, a room, or the like by visually blocking an escape route and to secure time until the intruder is captured.

    [0003] JP-B No. 3816867 discloses an invention of a smoke screen generation apparatus. As shown in Figs. 1 to 5, the smoke screen generation apparatus has a disk-like outer shape and, at the time of actuation, discharges a smoke screen in a radial direction.

    [0004] In the apparatus shown in Fig. 1, when an ignition device 2 is actuated, an ignition agent 5 inside an ignition agent case 4 is ignited and burned, and flames and the like are generated. Subsequently, the flames and the like flow into a combustion chamber 10 to ignite and burn a smoke generating agent 6, and smoke is generated.

    [0005] JP-A No. 2015-043143 discloses an invention of a smoke generator. As shown in Figs. 1 and 3, a smoke screen generation apparatus has a disk-like outer shape and, at the time of actuation, discharges a smoke screen in a radial direction in a similar manner to JP-B No. 3816867.

    [0006] With the smoke generator according to JP-A No. 2015-043143, since a combustion rate of an entire smoke generating agent is improved, an ejection rate and a diffusion rate of generated smoke into a room are also elevated.

    [0007] In addition, document US 2014/230685 A1 discloses a gas generator including a cylindrical housing, a diffuser portion, a first combustion chamber defined by a first porous plate member, a second combustion chamber defined by a second porous plate member, and an ignition device having an ignition portion attached to an igniter collar.

    SUMMARY OF INVENTION



    [0008] A first aspect of the present invention (hereinafter, referred to as a "first aspect") provides a smoke screen generator including a cylindrical housing, an igniter and a smoke screen generating agent which are accommodated in the cylindrical housing,
    a first closure including the igniter and closing a first end opening of the cylindrical housing,
    a second closure having a first discharge flow path and a first discharge port, which is an outlet of the first discharge flow path, and closing a second end opening of the cylindrical housing on an opposite side in an axial direction to the first end opening,
    a flow path changing member for a smoke screen source being attached to an outer side of the second closure,
    a second discharge flow path being provided between the second closure and the flow path changing member and in communication with the outlet of the first discharge flow path, and an outlet of the second discharge flow path being a final discharge port,
    the first discharge flow path being extended in a direction coaxial with the cylindrical housing and the second discharge flow path being extended in a different direction from that of the first discharge flow path,
    the first closure having a discharge hole for discharging an ignition product which is generated at the time of actuation of the igniter,
    a porous cylindrical body being arranged between a surface of the first closure where the discharge hole for the ignition product is not provided and the first discharge flow path of the second closure,
    a space between an inner circumferential wall surface of the cylindrical housing and the porous cylindrical body being a smoke screen generating agent-accommodating chamber which accommodates the smoke screen generating agent, and the discharge hole for the ignition product facing the smoke screen generating agent-accommodating chamber, and
    at the time of actuation of the igniter, the smoke screen generating agent in the smoke screen generating agent-accommodating chamber being ignited and burned to generate a smoke screen source, the smoke screen source moving through an inside of the porous cylindrical body, passing through the first discharge flow path, the first discharge port and the second discharge flow path, and thereafter being discharged from the final discharge port to the outside in order to generate a smoke screen.

    [0009] A second aspect of the present invention (hereinafter, referred to as a "second aspect") provides a smoke screen generator including a cylindrical housing, an igniter and a smoke screen generating agent which are accommodated in the cylindrical housing,
    a first closure including the igniter and closing a first end opening of the cylindrical housing,
    a second closure having a first discharge flow path and a first discharge port, which is an outlet of the first discharge flow path, and closing a second end opening of the cylindrical housing on an opposite side in an axial direction to the first end opening,
    a flow path changing member for a smoke screen source being attached to an outer side of the second closure at an interval from the second closure in the axial direction,
    the flow path changing member being substaintially in a cup shape and having a bottom portion and a circumferential wall,
    the second closure having a shape such that a continuous second discharge flow path is formed between the second closure and the bottom portion of the flow path changing member, between the second closure and an inner circumferential surface of the circumferential wall of the flow path changing member, between the second closure and an annular end surface of an opening of the flow path changing member, and between the second closure and an outer circumferential surface of the circumferential wall of the flow path changing member,
    the first discharge flow path, which is provided in the second closure, being extended in a direction coaxial with the cylindrical housing,
    the second discharge flow path being provided between the second closure and the flow path changing member and being in communication with the first discharge flow path, extended in an orthogonal direction to the first discharge flow path and further bent at a plurality of locations, and an outlet of the second discharge flow path being a final discharge port,
    the first closure having a discharge hole for discharging an ignition product which is generated at the time of actuation of the igniter,
    a porous cylindrical body being arranged between a surface of the first closure where the discharge hole for the ignition product is not provided and the first discharge flow path of the second closure,
    a space between an inner circumferential wall surface of the cylindrical housing and the porous cylindrical body being a smoke screen generating agent-accommodating chamber which accommodates the smoke screen generating agent, and the discharge hole for the ignition product facing the smoke screen generating agent-accommodating chamber, and
    at the time of actuation of the igniter, the smoke screen generating agent in the smoke screen generating agent-accommodating chamber being ignited and burned to generate a smoke screen source, the smoke screen source moving through an inside of the porous cylindrical body, passing through the first discharge flow path, the first discharge port and the second discharge flow path, and thereafter being discharged from the final discharge port to the outside in order to generate a smoke screen.

    BRIEF DESCRIPTION OF DRAWINGS



    [0010] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are no limitative of the present invention and wherein:

    [0011] 

    [Fig. 1] Fig. 1 shows a cross-sectional view in an axial direction of a smoke screen generator according to the present invention;

    [Fig. 2] Fig. 2 shows a cross-sectional view of one component shown in Fig. 1;

    [Fig. 3] Fig. 3 shows, in (a), a cross-sectional view with respect to the arrow III-III in Fig. 1 and, in (b), a plan view from a side of a flow path changing member shown in Fig. 1; and

    [Fig. 4] Fig. 4 shows a cross-sectional view in an axial direction of another embodiment of a smoke screen generator according to the present invention.


    DETAILED DESCRIPTION OF INVENTION



    [0012] In the apparatus shown in Fig. 1 of JP-B No. 3816867, since the smoke generating agent in the combustion chamber 10 burns in sequence from a position near to the ignition agent case 4 to a position far from the ignition agent case 4, combustion of the entire smoke generating agent 6 takes time, resulting in a slow ejection rate of generated smoke from the apparatus into a room and also a slow diffusion rate of the generated smoke.

    [0013] The apparatuses according to the inventions of JP-B No. 3816867 and JP-A No. 2015-043143 both have a disk-like outer shape. In other cases, smoke generating apparatuses may have a cylindrical outer shape.

    [0014] When an apparatus with a cylindrical outer shape is used, it is difficult to increase an ignition and combustion rate of an entire smoke generating agent and further elevate an ejection rate and a diffusion rate of generated smoke into a room.

    [0015] The present invention provides a smoke screen generator in which an ignition and combustion rate of an entire smoke screen generating agent is increased and, further, an ejection rate and a diffusion rate of generated smoke into a room are elevated with a use of a cylindrical container.

    [0016] Further, the present invention provides a smoke screen generator which reduces a discharge amount of by-products derived from components of a smoke screen generating agent.

    [0017] A cylindrical housing is made of a metal such as iron or stainless steel and has a first end opening and a second end opening.

    [0018] A first closure is made of a metal such as iron or stainless steel and has a shape and a size which are capable of closing the first end opening of the cylindrical housing.

    [0019] The first closure is attached to the first end opening of the cylindrical housing by being screwed thereinto, by being press-fitted thereinto, or by being welded thereto.

    [0020] An igniter and the first closure may be integrated or the igniter may be disposed in the first closure.

    [0021] As the igniter, a known igniter for a gas generator used in an airbag apparatus can be used.

    [0022] A second closure is made of a metal such as iron or stainless steel and has a shape and a size which are capable of closing the second end opening of the cylindrical housing.

    [0023] The second closure has a first discharge flow path and a first discharge port for a smoke screen source which is an outlet of the first discharge flow path. The first discharge flow path is extended in a direction coaxial with the cylindrical housing.

    [0024] The second closure is attached to the second end opening of the cylindrical housing by being screwed thereinto, by being press-fitted thereinto, or by being welded thereto.

    [0025] The second closure may be formed of a single member or may be formed of a combination of two members.

    [0026] When the second closure is formed of a combination of two members, the two members may be integrated by being screwed into each other, by being press-fitted into each other, or by being welded to each other.

    [0027]  A porous cylindrical body of the first aspect and the second aspect needs only to be a metallic cylindrical member having a large number of holes on a circumferential surface thereof, and a net molded into a cylindrical shape, a cylinder with a large number of holes formed on a circumferential surface thereof, and the like can be used. However, it is preferable that the porous cylindrical body is a net molded into a cylindrical shape.

    [0028] Holes of the porous cylindrical body (a mesh size of the net) preferably are in a size such that the smoke screen source passes therethrough and prevents entry of a smoke screen generating agent accommodated in a smoke screen generating agent-accommodating chamber.

    [0029] Further, when a smoke screen generating agent that is smaller than the holes of the porous cylindrical body (the mesh size of the net) is used as the smoke screen generating agent accommodated in the smoke screen generating agent-accommodating chamber, a combustible member such as paper can be interposed between the porous cylindrical body and the smoke screen generating agent in order to prevent the smoke screen generating agent from entering a discharge path of the smoke screen source.

    [0030] Prior to actuation, the porous cylindrical body acts to push the smoke screen generating agent accommodated in the smoke screen generating agent-accommodating chamber radially outward and therefore functions to prevent gaps from being created in the smoke screen generating agent-accommodating chamber, and at the time of actuation, the porous cylindrical body functions as a discharge path of the smoke screen source generated by combustion of the smoke screen generating agent.

    [0031] The smoke screen generating agent is preferably a known smoke screen generating agent molded into a columnar shape or the like, but the smoke screen generating agent may be in a powder form. As the smoke screen generating agent, for example, a smoke generating agent composition including a smoke generating agent and a gas generating agent disclosed in JP-A No. 2015-42603 or a combination of the smoke generating agent and the gas generating agent disclosed in JP-A No. 2015-43143 can be used.

    [0032] The gas generating agent includes a fuel, an oxidizing agent, a binder and the like. As the fuel, in addition to those described in the above patent documents, a fuel selected from sucrose, silicone oil, and tripotassium citrate salt (monohydrate) can be used.

    [0033] As the smoke generating agent, a first component, a second component, or a combination of the first component and the second component can be used. The first component is preferably selected from paraffin wax, liquid paraffin, microcrystalline wax, polyethylene glycol and the like, and the second component is preferably selected from metal carbonate (hydrate), metal hydride, and metal hydroxide.

    [0034] It is preferable in the smoke screen generator according to the present invention that the first discharge flow path which is provided in the second closure is extended in a direction coaxial with the cylindrical housing, and
    the second discharge flow path between the second closure and the flow path changing member is extended in a direction orthogonal to the first discharge flow path.

    [0035] The flow path changing member is made of a metal such as iron or stainless steel and is combined with the second closure to form the second discharge flow path.

    [0036] The flow path changing member and the second closure may be integrated by a fixing means such as a bolt in a state where an interval is provided between the flow path changing member and the second closure. In the case of such a formation, the interval between the flow path changing member and the second closure is the second discharge flow path.

    [0037] Furthermore, the flow path changing member and the second closure may be formed integrally, or may be integrated by welding. In the case of such formations, for example, the second discharge flow path is formed by a single channel or a plurality of channels (for example, cross-shaped channels or radial channels) connected to an outlet of the first discharge flow path.

    [0038] The second discharge flow path is extended in a direction that differs from that of the first discharge flow path.

    [0039] Since the first discharge flow path is extended in the axial direction of the cylindrical housing, an angle formed between the second discharge flow path and the axial direction of the cylindrical housing is preferably equal to or smaller than 90 degrees and may be set to, for example, a range of 45 to 90 degrees.

    [0040] It is preferable in the smoke screen generator according to the first aspect that the second discharge flow path is provided between the second closure and the flow path changing member, and in communication with an outlet of the first discharge flow path,
    a through hole, which penetrates the flow path changing member in a thickness direction and reaches the second discharge flow path, is provided,
    an annular outlet of the second discharge flow path is a first final discharge port and the through hole is a second final discharge port, and
    the first final discharge port and the second final discharge port are opened and closed to control a discharge direction of a smoke screen source.

    [0041] The smoke screen generator according to the present embodiment has a first final discharge port and a second final discharge port as final discharge ports connected to the second discharge flow path.

    [0042] The first final discharge port opens in a direction that differs from the first discharge flow path while the second final discharge port opens in a same direction as the first discharge flow path.

    [0043] Therefore, by opening or closing the first final discharge port and the second final discharge port, a discharge direction of the smoke screen source is controlled.

    [0044] A method of opening and closing the first final discharge port and the second final discharge port is not particularly limited and, such a method can be employed that screws are threaded in respective inner wall surfaces of the first final discharge port and the second final discharge port and a bolt is screwed thereinto to close the discharge holes or unscrewed therefrom to open the discharge holes.

    [0045] Moreover, when there are a plurality of first final discharge ports and a plurality of second final discharge ports, a part of the plurality of the first final discharge ports may be closed while the remaining holes are opened, and a part of the plurality of the second final discharge ports may be closed while the remaining holes are opened.

    [0046] Since the igniter is positioned at the first end opening together with the first closure, when the igniter is actuated, the smoke screen generating agent in the smoke screen generating agent-accommodating chamber is ignited and burned on the side of the first closure and combustion proceeds toward the second closure.

    [0047] In the smoke screen generator according to the present invention, the porous cylindrical body is arranged in a central portion of the smoke screen generating agent-accommodating chamber in a range from the first closure to the second closure, and thereby, when the smoke screen generating agent is ignited and burned on the side of the first closure, high-temperature gas generated by the combustion enters the porous cylindrical body, moves in the axial direction, and at the same time, ignites and burns the smoke screen generating agent in contact with the porous cylindrical body.

    [0048] Therefore, compared to a case where the combustion of the smoke screen generating agent only proceeds from the first closure toward the second closure, overall combustion proceeds more quickly and ejection and diffusion of a smoke screen are also promoted.

    [0049] Subsequently, after being discharged from a smoke screen source discharge port of the second closure, the high temperature-smoke screen source passes through the first discharge flow path, then changes its direction by passing through the second discharge flow path of the flow path changing member, and is discharged as a smoke screen into a room from the final discharge ports.

    [0050] In the smoke screen generator according to the first aspect, it is possible that the first discharge flow path which is provided in the second closure is extended in a direction coaxial with the cylindrical housing, and
    the second discharge flow path between the second closure and the flow path changing member is extended in a direction orthogonal to the first discharge flow path.

    [0051] With the first discharge flow path and the second discharge flow path being orthogonal to each other, when the smoke screen source enters the second discharge flow path from the first discharge flow path, the smoke screen source collides directly with an inner wall surface to change its direction before being discharged into a room.

    [0052] In the smoke screen generator according to the second aspect, by adjusting an external shape of the second closure and an internal shape of the flow path changing member, the second discharge flow path is formed to be in communication with the first discharge flow path, and to be extended in an orthogonal direction to the first discharge flow path and further bent at a plurality of locations.

    [0053] Therefore, the smoke screen source collides at a plurality of locations in the course of passing through the second discharge flow path until the final discharge port, and thereafter is discharged from the final discharge ports.

    [0054] It is preferable in the smoke screen generator according to the present invention (the first aspect and the second aspect) that a central portion of the first closure, where the discharge holes of the ignition product are not provided, has a protruding portion,
    a surface of the second closure at a position, which faces the protruding portion of the first closure in the axial direction, has a first discharge flow path, and
    one end opening of the porous cylindrical body is fitted onto an outer side of the protruding portion of the first closure and the other end opening thereof is fitted to an inner side of the first discharge flow path of the second closure to fix the porous cylindrical body.

    [0055] In this manner, by fitting and fixing the porous cylindrical body between the protruding portion of the first closure and an annular stepped surface (a depressed portion) of the second closure, the porous cylindrical body is disposed easily.

    [0056] Since the smoke screen generator according to the present invention provides a high ignition and combustion rate of a smoke screen generating agent and enables a smoke screen to be readily diffused, the smoke screen generator according to the present invention is suitable as a security apparatus.

    [0057] The smoke screen generator according to the present invention can be used as a security apparatus.

    EMBODIMENTS OF INVENTION


    <Smoke screen generator shown in Fig. 1>



    [0058] In a smoke screen generator 1, a cylindrical housing 10 is combined with a flow path changing member 60.

    [0059] A first annular stepped surface 12 is provided on an inner circumferential surface of a circumferential wall 11 on the side of a first end 10a of the cylindrical housing 10, and a section between the first annular stepped surface 12 and the first end 10a corresponds to a first tip circumferential wall 13 which is reduced in thickness. An inner circumferential surface 13a of the first tip circumferential wall 13 has a screw portion.

    [0060] A second annular stepped surface 14 is provided on the inner circumferential surface of the circumferential wall 11 on the side of a second end 10b of the cylindrical housing 10, and a section between the second annular stepped surface 14 and the second end 10b corresponds to a second tip circumferential wall 15 which is reduced in thickness. An outer circumferential surface 15a of the second tip circumferential wall 15 has a screw portion.

    [0061] The first end 10a of the cylindrical housing 10 is closed by a first closure 20.

    [0062] The first closure 20 is substantially in a cup shape and has a bottom surface 21 and a circumferential wall 22.

    [0063] The bottom surface 21 has a protrusion 23 in a central portion thereof and has, around the protrusion 23, a plurality of discharge holes 24 for an ignition product formed by piercing the bottom surface 21. Around two to eight of the discharge holes 24 for the ignition product are formed at equal intervals in a circumferential direction.

    [0064] A seal tape which is to rupture during actuation is attached to close the discharge holes 24 of the bottom surface 21, when necessary, in order to prevent spillage of a smoke screen generating agent or as a measure against humidity.

    [0065] The circumferential wall 22 has a screw portion 22a which is screwed into the screw portion of the inner circumferential surface 13a of the first tip circumferential wall 13.

    [0066] An igniter 5 including an igniter collar 6 is disposed in an internal space 25 of the first closure 20.

    [0067] The igniter 5 is mounted by screwing the igniter collar 6 into an inner circumferential wall surface 25a of the first closure 20.

    [0068] An ignition portion 5a of the igniter 5 is positioned inside the internal space 25.

    [0069] The second end 10b of the cylindrical housing 10 is closed by a second closure 30.

    [0070] The second closure 30 is formed of a combination of a first member 31 and a second member 40, but the second closure 30 may be formed of a single member.

    [0071] As shown in Figs. 1 and 2, the first member 31 has an annular substrate 32 with a larger outer diameter, an annular protrusion 33 which is formed on the annular substrate 32 and has an outer diameter smaller than that of the annular substrate 32, an inner circumferential wall 34a of the annular substrate, an outer circumferential wall 34b of the annular substrate, and an annular bottom surface 35.

    [0072] Due to a difference in outer diameters between the annular protrusion 33 and the annular substrate 32, the annular protrusion 33 has an annular inner stepped surface 36a which is arranged on the side of the inner circumferential wall 34a of the annular substrate and faces in the direction of the axis X, and an annular outer stepped surface 36b which is arranged on the side of the outer circumferential wall 34b of the annular substrate and faces in the direction of the axis X.

    [0073] Due to a difference in outer diameters between the annular protrusion 33 and the annular substrate 32, the annular protrusion 33 has an annular inner circumferential wall surface 37a which faces inward in a radial direction (a direction orthogonal to the direction of the axis X), and an annular outer circumferential wall surface 37b which faces outward in the radial direction.

    [0074] A first-a discharge flow path 44 is formed in a central portion of the first member 31.

    [0075] The first member 31 is fitted into an opening of the second end 10b of the cylindrical housing 10 in a state where the annular outer circumferential wall surface 37b abuts against the inner circumferential wall surface 10c of the cylindrical housing 10, the annular outer stepped surface 36b abuts against the second annular stepped surface 14, and the outer circumferential wall 34b of the annular substrate abuts against the second tip circumferential wall 15.

    [0076] The second member 40 is substantially in a cup-shape and has a circumferential wall 41 and has a bottom surface 42.

    [0077] The circumferential wall 41 has a screw portion 41a on an inner circumferential surface thereof.

    [0078] The bottom surface 42 has, in a central portion thereof, a first-b discharge flow path 45 and a first-c discharge flow path 46 which are through holes with different inner diameters, and the first-b discharge flow path 45 is connected to the first-a discharge flow path 44.

    [0079] The first-a discharge flow path 44, the first-b discharge flow path 45, and the first-c discharge flow path 46 form a first discharge flow path for a smoke screen source, and an outlet of the first-c discharge flow path 46 is a first discharge port 46a.

    [0080] The first-a discharge flow path 44 of the first member 31 and the first-b discharge flow path 45 and the first-c discharge flow path 46 of the second member 40 form the first discharge flow path, and centers of the discharge flow paths are positioned coaxially with the axis X of the cylindrical housing 10.

    [0081] The second member 40 is fixed by screwing the screw portion 41a onto the outer circumferential surface 15a of the second tip circumferential wall 15.

    [0082] Since the bottom surface 42 of the second member 40 presses the annular bottom surface 35 of the first member 31 in the direction of the axis X (a direction toward the first end 10a), the first member 31 is held between the second member 40 and the second annular stepped surface 14 and fixed thereby.

    [0083] The flow path changing member 60 is in a disk shape and integrally formed with the second member 40.

    [0084] As shown in (a) in Fig. 3, a cross-shaped second discharge flow path 47 is formed between the flow path changing member 60 and the second member 40.

    [0085] A central axis (the axis X) passing through the first-a discharge flow path 44, the first-b discharge flow path 45 and the first-c discharge flow path 46 and a central axis passing through the cross-shaped second discharge flow path 47 are orthogonal to each other.

    [0086] The cross-shaped second discharge flow path 47 has first final discharge ports 48a to 48d at four locations.

    [0087] As shown in (b) in Fig. 3, the flow path changing member 60 has holes 49a to 49d at four locations in a thickness direction, and the holes 49a to 49d penetrate from the bottom surface 42 to the cross-shaped second discharge flow path 47 and respectively serve as second final discharge ports 49a to 49d.

    [0088] It is possible to close and open every one of the first final discharge ports 48a to 48d and the second final discharge ports 49a to 49d.

    [0089] As a means for closing and opening these ports, a combination of screw portions, which are formed on inner wall surfaces of the first final discharge ports 48a to 48d and inner wall surfaces of the second final discharge ports 49a to 49d, and bolts can be used.

    [0090] Depending on a mounted state of the smoke screen generator, it is possible to control which ones of the first final discharge ports 48a to 48d and the second final discharge ports 49a to 49d are opened.

    [0091] An example thereabove can include an embodiment in which the first final discharge ports 48a to 48d are opened and the second final discharge ports 49a to 49d are closed (or an embodiment in which all of the final discharge ports are opened) when the smoke screen generator is installed in a central portion of a ceiling of a room, and an embodiment in which the first final discharge ports 48a to 48d are closed and the second final discharge ports 49a to 49d are opened when the smoke screen generator is installed in a corner of the room.

    [0092] A porous cylindrical body 50 which is formed of a net molded in a cylindrical shape is disposed inside the cylindrical housing 10.

    [0093] In the porous cylindrical body 50, a first opening 50a is fitted onto the protrusion 23 of the first closure 20 from the outer side, and a second opening 50b is abutted against the annular inner stepped surface 36a and the annular inner circumferential wall surface 37a of the first member 31 of the second closure.

    [0094] Since the porous cylindrical body 50 is fixed from both sides in the direction of the axis X, the porous cylindrical body 50 does not move prior to actuation and at the time of actuation.

    [0095] A cylindrical space between the inner circumferential wall surface 10c of the cylindrical housing 10 and the porous cylindrical body 50 is a smoke screen generating agent-accommodating chamber 55 which accommodates a smoke screen generating agent 56.

    [0096] The smoke screen generating agent 56 is a known smoke screen generating agent, and a smoke generating agent composition including a smoke generating agent and a gas generating agent disclosed in JP-A No. 2015-42603 or a combination of a smoke generating agent and a gas generating agent disclosed in JP-A No. 2015-43143, or the like can be used.

    [0097] The smoke screen generating agent 56 can be provided in an agent form with a desired shape such as a columnar shape, a disk shape, a powder shape, and a granular shape.

    [0098] The smoke screen generating agent-accommodating chamber 55 faces, on the side of the first end 10a, the plurality of the discharge holes 24 for the ignition product which are formed on the bottom surface 21 of the first closure 20, and, on the side of the second end 10b, the first member 31 of the second closure 30.

    [0099] The igniter 5, the porous cylindrical body 50, the first-a discharge flow path 44, the first-b discharge flow path 45, the first-c discharge flow path 46 and the flow path changing member 60 are arranged such that central axes thereof and the axis X of the cylindrical housing 10 are coaxial with each other.

    [0100] An embodiment of a method for assembling the smoke screen generator 1 shown in Fig. 1 will be described, but the assembling method is not limited thereto.

    [0101] In a state where the first member 31 is arranged at the opening of the second end 10b of the cylindrical housing 10, the second member 40 (the second member 40 integrated with the flow path changing member 60) is screwed onto the cylindrical housing 10 from the outside to be fixed, and thereby, the opening of the second end 10b is closed.

    [0102] Next, in a state where the second opening 50b of the porous cylindrical body 50 is fitted into the annular inner stepped surface 36a of the first member 31, a prescribed amount of the smoke screen generating agent 56 is charged into the smoke screen generating agent-accommodating chamber 55.

    [0103] Subsequently, while the first closure 20 is screwed into the first tip circumferential wall 13 of the cylindrical housing 10, the protrusion 23 is fitted into the first opening 50a of the porous cylindrical body 50.

    [0104] Next, the igniter 5 is screwed into the first closure 20 to be fixed.

    [0105] Next, an operation of the smoke screen generator 1 will be described with reference to Fig. 1.

    [0106] When the igniter 5 is actuated and an ignition product such as flames is discharged into the internal space 25, the ignition product is discharged into the smoke screen generating agent-accommodating chamber 55 from the discharge holes 24 for the ignition product and the smoke screen generating agent 56 is ignited and burned.

    [0107] A high-temperature smoke screen source generated by the combustion of the smoke screen generating agent 56 passes through the porous cylindrical body 50 and moves in a direction toward the second closure 30 from the first closure 20.

    [0108] The combustion of the smoke screen generating agent 56 proceeds in the direction toward the second closure 30 from the first closure 20. At the same time, since ignition and combustion also proceed as the high-temperature smoke screen source, which is passing through the porous cylindrical body 50, comes into contact with the smoke screen generating agent 56, the combustion also proceeds outward from the inside in a radial direction.

    [0109] Since the combustion of the smoke screen generating agent 56 proceeds in different directions in this manner, even when the cylindrical housing 10 (the smoke screen generating agent-accommodating chamber 55) in an elongated shape as shown in Fig. 1 is used, a rate in which the combustion of the smoke screen generating agent 56 proceeds increases.

    [0110] After moving through the porous cylindrical body 50, the smoke screen source passes through the first-a discharge flow path 44 of the first member 31, and after further passing through the first-b discharge flow path 45 and the first-c discharge flow path 46 (the first discharge port 46a) of the second member 40, collides with the flow path changing member 60, changes its direction, passes through the second discharge flow path 47, and is radially discharged into a room through the first final discharge ports 48a to 48d to create a smoke screen.

    [0111] While a discharge rate of the smoke screen source is controlled at a portion with a smallest sectional area in the first discharge flow path (the first-a discharge flow path 44, the first-b discharge flow path 45 and the first-c discharge flow path 46) and the second discharge flow path 47, diffusion of a smoke screen is facilitated by increasing opening areas of the first final discharge ports 48a to 48d and by causing the smoke screen source to be radially discharged.

    [0112] Moreover, this operation represents an embodiment in which the second final discharge ports 49a to 49d are closed. When the first final discharge ports 48a to 48d are closed and the second final discharge ports 49a to 49d are opened, since the smoke screen source is discharged in the axial direction, a directional discharge operation of the smoke screen source is realized.

    [0113] The smoke screen generator 1 shown in Fig. 1 also produces, the following collateral effects.

    [0114] As described above, a combination of a gas generating agent and a smoke generating agent is used as the smoke screen generating agent 56 used in the smoke screen generator 1.

    [0115] When the smoke screen generating agent 56 burns at the time of actuation, a by-product derived from a component of the smoke screen generating agent 56 may be created concurrently with the generation of a smoke screen source.

    [0116] Conceivable examples of the by-product include potassium nitrate used as an oxidizing agent, potassium carbonate generated by combustion of sucrose or wax, potassium bicarbonate resulting from the absorption of carbon dioxide by potassium carbonate, carbides derived from an organic substance such as sucrose and waxes, and aggregates including potassium bicarbonate and the carbide.

    [0117] The by-product hardly contributes to the generation of a smoke screen when discharged into a room from the smoke screen generator 1, and increases a burden of subsequent cleanup work by remaining in the room after actuation in a state where the by-product is adhered to a floor surface or a wall surface of the room.

    [0118] By using the smoke screen generator 1 shown in Fig. 1, the smoke screen source passes through the first discharge flow path (the first-a discharge flow path 44, the first-b discharge flow path 45 and the first-c discharge flow path 46), collides with the flow path changing member 60 and changes its direction, passes through the second discharge flow path 47, and is discharged into a room through the final discharge ports 48. Accordingly, the smoke screen source (including the by-product described above) in a high temperature state repetitively comes into contact with the inner wall surfaces of the discharge flow paths.

    [0119] As described above, the smoke screen source (including the by-product described above) in a high temperature state repetitively comes in contact with the inner wall surfaces of the discharge flow paths, and, during this process, the by-product adheres to and is captured by the inner wall surfaces before the smoke screen source is discharged from the final discharge ports 48. Thereby, a discharge amount of the by-product from the final discharge ports 48 is reduced.

    <Smoke screen generator shown in Fig. 4>



    [0120] A smoke screen generator 1A shown in Fig. 4 is the same as the smoke screen generator-1 shown in Fig. 1 with the exception of having a different formation of a second discharge flow path. A same reference numeral as in Fig. 1 refers to a same component or part.

    [0121] The second closure 30 includes the first member 31 and a second member 140.

    [0122] The second member 140 is substantially in a cup shape, has a bottom surface 141 and a first circumferential surface 142, further a flange portion 143 extended outward from an opening and a second circumferential surface 144 extended in the direction of the bottom surface 141 from the flange portion 143.

    [0123] The bottom surface 141 has a through hole in a central portion thereof, the through hole is a first-b discharge flow path 150, and the first-b discharge flow path 150 is connected to the first-a discharge flow path 44.

    [0124] Further, a seal tape can be provided as necessary before the first-b discharge flow path 150 as a measure against humidity.

    [0125] An outlet of the first-b discharge flow path 150 which faces a second discharge flow path 151 is a first discharge port 150a.

    [0126] An inner surface of the first circumferential surface 142 has a screw portion 142a, and the screw portion 142a is screwed onto a screw portion of the outer circumferential surface 15a of the second tip circumferential wall 15.

    [0127] A flow path changing member 160 is in a cup shape and has a bottom surface 161, a circumferential surface 162 and further an annular end surface 163 at an opening.

    [0128] An inner diameter of the circumferential surface 162 is larger than an outer diameter of the first circumferential surface 142 of the second member 140, and an outer diameter of the circumferential surface 162 is smaller than an inner diameter of the second circumferential surface 144.

    [0129] The flow path changing member 160 is attachably and detachably mounted to the second member 140 by four bolts 167 such that a continuous interval is formed between the bottom surface 161 and the bottom surface 141 of the second member 140, between an inner circumferential surface of the circumferential surface 162 and an outer circumferential surface of the first circumferential surface 142 of the second member 140, between the annular end surface 163 and the flange portion 143, and between an outer circumferential surface of the circumferential surface 162 and an inner circumferential surface of the second circumferential surface 144.

    [0130] The four bolts 167 are screwed in so as to straddle through holes at four locations in a thickness direction of the flow path changing member 160 and screw holes at four locations of the second member 140.

    [0131] The continuous interval between the flow path changing member 160 and the second member 140 is the second discharge flow path 151.

    [0132] The second discharge flow path 151 is connected to the first discharge flow path (the first-a discharge flow path 44 and the first-b discharge flow path 150) and reaches a final discharge port 152 which is an annular opening, after passing three corner portions (flow paths bent at 90-degree angles).

    [0133] The smoke screen generator 1A shown in Fig. 4 can be assembled by a similar procedure to the smoke screen generator 1 shown in Fig. 1.

    [0134] While the smoke screen generator 1A shown in Fig. 4 performs similar operations to the smoke screen generator 1 shown in Fig. 1, since the second discharge flow path 151 is bent, a capturing effect of the by-product described earlier is enhanced as compared to the smoke screen generator 1 shown in Fig. 1.

    [0135] In the smoke screen generator 1 shown in Fig. 1 and the smoke screen generator 1A shown in Fig. 4, when the following agent is used as a smoke screen generating agent, a reduction effect of a discharge amount of the by-product described earlier is enhanced.

    [0136] As the smoke screen generating agent, a combination of a gas generating agent and a smoke generating agent is preferably used.

    [0137] The gas generating agent includes a fuel, an oxidizing agent, a binder which are known, and the like.

    [0138] The fuel is preferably selected from sucrose, silicone oil, and tripotassium citrate salt (monohydrate).

    [0139] The oxidizing agent is preferably selected from a chlorate such as potassium chlorate and sodium chlorate, a perchlorate such as strontium perchlorate, magnesium perchlorate, ammonium perchlorate, potassium perchlorate, and sodium perchlorate, and a nitrate such as strontium nitrate, potassium nitrate, and sodium nitrate. Among these, a nitrate is more preferable, and potassium nitrate is even more preferable.

    [0140] As the smoke generating agent, a first component, a second component, or a combination of the first component and the second component is used.

    [0141] The first component is preferably selected from paraffin wax, liquid paraffin, microcrystalline wax, polyethylene glycol and the like.

    [0142] The second component is preferably selected from metal carbonate (hydrate), metal hydride and metal hydroxide.

    <Experimental example>



    [0143] The smoke screen generator (with only the first final discharge ports 48a to 48d opened) shown in Fig. 1, the smoke screen generator shown in Fig. 4, and a comparative smoke screen generator produced by removing the flow path changing member from the smoke screen generator shown in Fig. 1 were prepared.

    [0144] An actuation experiment was conducted using a smoke screen generating agent with the following composition as the smoke screen generating agents of the respective smoke screen generators, and discharge amounts of by-products were observed.

    (Composition of smoke screen generating agent)



    [0145] Sucrose / potassium nitrate / paraffin wax = 33 / 52 / 15 (mass%)

    <Observation method of discharge amount of by-products>



    [0146] The smoke screen generator was placed at center inside an airtightly sealed test dome (16 m3), and a single sheet of white A3 paper was placed 1 m away from the smoke screen generator.

    [0147] After actuation of the smoke screen generator, stain condition of the A3 paper was observed by the naked eye to determine an amount of by-products.

    [0148] The A3 paper of the comparative smoke screen generator (without the flow path changing member) was colored brown as a whole as compared to a brand new sheet of A3 paper.

    [0149] The A3 paper of the smoke screen generator shown in Fig. 1 was colored light brown as a whole as compared to a brand new sheet of A3 paper but had less coloration than the comparative smoke screen generator.

    [0150] The A3 paper of the smoke screen generator shown in Fig. 4 had almost the same color as a brand new sheet of A3 paper.

    [0151] Moreover, when checked by the naked eye through an observation port of the test dome, there was no obvious difference in thickness of the smoke screen among the smoke screen generators.

    [0152] Although the staining substance on the sheets of A3 paper is conceivably by-products derived from components of the smoke screen generating agent, if a thickness of a smoke screen due to actuation of the smoke screen generators is the same, a smoke screen generator with a smaller discharge amount of the staining substance is desirable from the perspective of reducing a burden of cleanup work of a room interior-after actuation.

    [0153] Such a variation in the discharge amount of the staining substance is conceivably due to a difference in states of contact (states of collision) between the smoke screen source and the second discharge flow path.

    [0154] The invention thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.


    Claims

    1. A smoke screen generator (1) comprising a cylindrical housing (10), an igniter (5) and a smoke screen generating agent (56) which are accommodated in the cylindrical housing (10),
    a first closure (20) including the igniter (5) and closing a first end opening (10a) of the cylindrical housing (10),
    a second closure (30) having a first discharge flow path (44, 45, 46) and a first discharge port (46a), which is an outlet of the first discharge flow path (44, 45, 46), and closing a second end opening (10b) of the cylindrical housing (10) on an opposite side in an axial direction to the first end opening (10a),
    a flow path changing member (60) for a smoke screen source being attached to an outer side of the second closure (30),
    a second discharge flow path (47) being provided between the second closure (30) and the flow path changing member (60) and in communication with the outlet (46a) of the first discharge flow path (44, 45, 46), and an outlet of the second discharge flow path (47) being a final discharge port (48a, 48b, 48c, 48d),
    the first discharge flow path (44, 45, 46) being extended in a direction coaxial with the cylindrical housing (10) and the second discharge flow path (47) being extended in a different direction from that of the first discharge flow path (44, 45, 46),
    the first closure (20) having a discharge hole (24) for discharging an ignition product which is generated at the time of actuation of the igniter (5),
    a porous cylindrical body (50) being arranged between a surface of the first closure (20) where the discharge hole (24) for the ignition product is not provided and the first discharge flow path (44, 45, 46) of the second closure (30),
    a space between an inner circumferential wall surface (10c) of the cylindrical housing (10) and the porous cylindrical body (50) being a smoke screen generating agent-accommodating chamber (55) which accommodates the smoke screen generating agent (56), and the discharge hole (24) for the ignition product facing the smoke screen generating agent-accommodating chamber (55), and
    at the time of actuation of the igniter (5), the smoke screen generating agent (56) in the smoke screen generating agent-accommodating chamber (55) being ignited and burned to generate a smoke screen source, the smoke screen source moving through an inside of the porous cylindrical body (50), passing through the first discharge flow path (44, 45, 46), the first discharge port (46a) and the second discharge flow path (47), and thereafter being discharged from the final discharge port (48a, 48b, 48c, 48d) to the outside in order to generate a smoke screen.
     
    2. The smoke screen generator (1) according to Claim 1, wherein the first discharge flow path (44, 45, 46) which is provided in the second closure (30) is extended in a direction coaxial with the cylindrical housing (10), and
    the second discharge flow path (47) between the second closure (30) and the flow path changing member (60) is extended in a direction orthogonal to the first discharge flow path (44, 45, 46).
     
    3. The smoke screen generator (1) according to Claim 1 or 2, wherein the second discharge flow path (47) is provided between the second closure (30) and the flow path changing member (60), and in communication with an outlet (46a) of the first discharge flow path (44, 45, 46),
    a through hole (49a, 49b, 49c, 49d), which penetrates the flow path changing member (60) in a thickness direction and reaches the second discharge flow path (47), is provided,
    an annular outlet of the second discharge flow path (47) is a first final discharge port (48a, 48b, 48c, 48d) and the through hole (49a, 49b, 49c, 49d) is a second final discharge port, and
    the first final discharge port (48a, 48b, 48c, 48d) and the second final discharge port (49a, 49b, 49c, 49d) are opened and closed to control a discharge direction of a smoke screen source.
     
    4. A smoke screen generator (1A) comprising a cylindrical housing (10), an igniter (5) and a smoke screen generating agent (56) which are accommodated in the cylindrical housing (10),
    a first closure (20) including the igniter (5) and closing a first end opening (10a) of the cylindrical housing (10),
    a second closure (30) having a first discharge flow path (44, 150) and a first discharge port (150a), which is an outlet of the first discharge flow path (44, 150), and closing a second end opening (10b) of the cylindrical housing (10) on an opposite side in an axial direction to the first end opening (10a),
    a flow path changing member (160) for a smoke screen source being attached to an outer side of the second closure (30) at an interval from the second closure (30) in the axial direction,
    the flow path changing member (160) being substantially in a cup shape and having a bottom portion (161) and a circumferential wall (162),
    the second closure (30) having a shape such that a continuous second discharge flow path (151) is formed between the second closure (30) and the bottom portion (161) of the flow path changing member (60), between the second closure (30) and an inner circumferential surface of the circumferential wall (162) of the flow path changing member (160), between the second closure (30) and an annular end surface (163) of an opening of the flow path changing member (160), and between the second closure (30) and an outer circumferential surface of the circumferential wall (162) of the flow path changing member (160),
    the first discharge flow path (44, 150), which is provided in the second closure (30), being extended in a direction coaxial with the cylindrical housing (10),
    the second discharge flow path (151) being provided between the second closure (30) and the flow path changing member (160) and being in communication with the first discharge flow path (44, 150), extended in an orthogonal direction to the first discharge flow path (44, 150) and further bent at a plurality of locations, and an outlet of the second discharge flow path (151) being a final discharge port (152),
    the first closure (20) having a discharge hole (24) for discharging an ignition product which is generated at the time of actuation of the igniter (5),
    a porous cylindrical body (50) being arranged between a surface of the first closure (20) where the discharge hole (24) for the ignition product is not provided and the first discharge flow path (44, 150) of the second closure (30),
    a space between an inner circumferential wall surface (10c) of the cylindrical housing (10) and the porous cylindrical body (50) being a smoke screen generating agent-accommodating chamber (55) which accommodates the smoke screen generating agent (56), and the discharge hole (24) for the ignition product facing the smoke screen generating agent-accommodating chamber (55), and
    at the time of actuation of the igniter (5), the smoke screen generating agent (56) in the smoke screen generating agent-accommodating chamber (55) being ignited and burned to generate a smoke screen source, the smoke screen source moving through an inside of the porous cylindrical body (50), passing through the first discharge flow path (44, 150), the first discharge port (150a) and the second discharge flow path (151), and thereafter being discharged from the final discharge port (152) to the outside in order to generate a smoke screen.
     
    5. The smoke screen generator (1, 1A) according to any one of Claims 1 to 4, wherein the porous cylindrical body (50) is a net molded into a cylindrical shape.
     
    6. The smoke screen generator (1, 1A) according to any one of Claims 1 to 5, wherein a central portion of the first closure (20), where the discharge holes (24) of the ignition product are not provided, has a protruding portion (23),
    a surface of the second closure (30) at a position, which faces the protruding portion (23) of the first closure (20) in the axial direction, has a first discharge flow path (44, 45, 46, 150), and
    one end opening (50a) of the porous cylindrical body (50) is fitted onto an outer side of the protruding portion (23) of the first closure (20) and the other end opening (50b) thereof is fitted to an inner side of the first discharge flow path (44, 45, 46, 150) of the second closure (30) to fix the porous cylindrical body (50).
     


    Ansprüche

    1. Ein Rauchschleiergenerator (1), umfassend ein zylindrisches Gehäuse (10), einen Zünder (5), und einen Rauchschleiererzeugungsstoff (56), die in dem zylindrischen Gehäuse (10) aufgenommen sind,
    einen ersten Verschluss (20), der den Zünder (5) beinhaltet und eine erste Endöffnung (10a) des zylindrischen Gehäuses (10) schließt,
    einen zweiten Verschluss (30), der einen ersten Entladeströmungspfad (44, 45, 46) und eine erste Entladeöffnung (46a) aufweist, die ein Auslass des ersten Entladeströmungspfades (44, 45, 46) ist, und eine zweite Endöffnung (10b) des zylindrischen Gehäuses (10) auf einer in einer axialen Richtung der ersten Endöffnung (10a) gegenüberliegenden Seite schließt, ein Strömungspfadänderungselement (60) für eine Rauchschleierquelle, die an einer äußeren Seite des zweiten Verschlusses (30) angebracht ist,
    einen zweiten Entladeströmungspfad (47), der zwischen dem zweiten Verschluss (30) und dem Strömungspfadänderungselement (60) vorgesehen ist und in Kommunikation mit dem Auslass (46a) des ersten Entladeströmungspfades (44, 45, 46) ist, und wobei ein Auslass des zweiten Entladeströmungspfades (47) eine finale Entladeöffnung (48a, 48b, 48c, 48d) ist,
    wobei der erste Entladeströmungspfad (44, 45, 46) in einer koaxialen Richtung mit dem zylindrischen Gehäuse (10) erstreckt ist, und der zweite Entladeströmungspfad (47) in einer unterschiedlichen Richtung von der des ersten Entladeströmungspfades (44, 45, 46) erstreckt ist,
    wobei der erste Verschluss (20) ein Entladeloch (24) zum Entladen eines Zündungsprodukts, das zu der Zeit der Aktivierung des Zünder (5) erzeugt wird, aufweist,
    wobei ein poröser zylindrischer Körper (50) zwischen einer Oberfläche des ersten Verschlusses (20), an der das Entladeloch (24) für das Zündungsprodukt nicht vorgesehen ist, und dem ersten Entladeströmungspfad (44, 45, 46) des zweiten Verschlusses (30) angeordnet ist,
    wobei ein Raum zwischen einer inneren Umfangswandfläche (10c) des zylindrischen Gehäuses (10) und dem porösen zylindrischen Körper (50) eine Rauchschleiererzeugungsstoffaufnahmekammer (55) ist, die den Rauchschleiererzeugungsstoff (56) aufnimmt, und das Entladeloch (24) für das Zündungsprodukt der Rauchschleiererzeugungsstoffaufnahmekammer (55) zugewandt ist, und
    wobei zu der Zeit der Aktivierung des Zünders (5) der Rauchschleiererzeugungsstoff (56) in der Rauchschleiererzeugungsstoffaufnahmekammer (55) gezündet und verbrannt wird, um eine Rauchschleierquelle zu erzeugen, sich die Rauchschleierquelle durch ein Inneres des porösen zylindrischen Körpers (50) bewegt, durch den ersten Entladeströmungspfad (44, 45, 46), die erste Entladeöffnung (46a) und den zweiten Entladeströmungspfad (47) verläuft, und danach von der finalen Entladeöffnung (48a, 48b, 48c, 48d) zu der Außenseite entladen wird, um einen Rauchschleier zu erzeugen.
     
    2. Der Rauchschleiergenerator (1) nach Anspruch 1, wobei der erste Entladeströmungspfad (44, 45, 46), der in dem zweiten Verschluss (30) vorgesehen ist, in einer koaxialen Richtung mit dem zylindrischen Gehäuse (10) erstreckt ist, und
    der zweite Entladeströmungspfad (47) zwischen dem zweiten Verschluss (30) und dem Strömungspfadänderungselement (60) in einer Richtung senkrecht zu den ersten Entladeströmungspfad (44, 45, 46) erstreckt ist.
     
    3. Der Rauchschleiergenerator (1) nach Anspruch 1 oder 2, wobei der zweite Entladeströmungspfad (47) zwischen dem zweiten Verschluss (30) und dem Strömungspfadänderungselement (60) vorgesehen ist und in Kommunikation mit einem Auslass (46a) des ersten Entladeströmungspfades (44, 45, 46) ist,
    ein Durchgangsloch (49a, 49b, 49c, 49d), das das Strömungspfadänderungselement (60) in einer Dickenrichtung durchdringt und den zweiten Entladeströmungspfad (47) erreicht, vorgesehen ist,
    ein ringförmiger Auslass des zweiten Entladeströmungspfades (47) eine erste finale Entladeöffnung (48a, 48b, 48c, 48d) ist und das Durchgangsloch (49a, 49b, 49c, 49d) eine zweite finale Entladeöffnung ist, und
    die erste finale Entladeöffnung (48a, 48b, 48c, 48d) und die zweite finale Entladeöffnung (49a, 49b, 49c, 49d) geöffnet und geschlossen werden, um eine Entladerichtung einer Rauchschleierquelle zu steuern.
     
    4. Ein Rauchschleiergenerator (1A), umfassend ein zylindrisches Gehäuse (10), einen Zünder (5), und einen Rauchschleiererzeugungsstoff (56), die in dem zylindrischen Gehäuse (10) aufgenommen sind,
    einen ersten Verschluss (20), der den Zünder (5) beinhaltet und eine erste Endöffnung (10a) des zylindrischen Gehäuses (10) schließt,
    einen zweiten Verschluss (30), der einen ersten Entladeströmungspfad (44, 150) und eine erste Entladeöffnung (150a) aufweist, die ein Auslass des ersten Entladeströmungspfades (44, 150) ist, und eine zweite Endöffnung (10b) des zylindrischen Gehäuses (10) auf einer in einer axialen Richtung der ersten Endöffnung (10a) gegenüberliegenden Seite schließt,
    ein Strömungspfadänderungselement (160) für eine Rauchschleierquelle, die an einer äußeren Seite des zweiten Verschlusses (30) an einem Intervall von dem zweiten Verschluss (30) in der axialen Richtung angebracht ist,
    wobei das Strömungspfadänderungselement (160) im Wesentlichen in einer Tassengestalt ist und einen Bodenabschnitt (161) und eine Umfangswand (162) aufweist,
    wobei der zweite Verschluss (30) eine Gestalt aufweist, sodass ein kontinuierlicher zweiter Entladeströmungspfad (151) zwischen dem zweiten Verschluss (30) und den Bodenabschnitt (161) des Strömungspfadänderungselements (60), zwischen dem zweiten Verschluss (30) und einer inneren Umfangsfläche der Umfangswand (162) des Strömungspfadänderungselements (160), zwischen dem zweiten Verschluss (30) und einer ringförmigen Endfläche (163) einer Öffnung des Strömungspfadänderungselement (160) und zwischen dem zweiten Verschluss (30) und einer äußeren Umfangsfläche der Umfangswand (162) des Strömungspfadänderungselements (160) ausgebildet ist,
    wobei der erste Entladeströmungspfad (44, 150), der in dem zweiten Verschluss (30) vorgesehen ist in einer koaxialen Richtung mit dem zylindrischen Gehäuse (10) erstreckt ist, wobei der zweite Entladeströmungspfad (151) zwischen dem zweiten Verschluss (30) und dem Strömungspfadänderungselement (160) vorgesehen ist und in Kommunikation mit dem ersten Entladeströmungspfad (44, 150) ist, in einer senkrechten Richtung zu dem ersten Entladeströmungspfad (44, 150) erstreckt ist und weiterhin an einer Vielzahl von Stellen gebogen ist, und ein Auslass des zweiten Entladeströmungspfades (151) eine finale Entladeöffnung (152) ist,
    wobei der erste Verschluss (20) ein Entladeloch (24) zum Entladen eines Zündungsprodukts, das zu der Zeit der Aktivierung des Zünder (5) erzeugt wird, aufweist,
    wobei ein poröser zylindrischer Körper (50) zwischen einer Oberfläche des ersten Verschlusses (20), an der das Entladeloch (24) für das Zündungsprodukt nicht vorgesehen ist, und dem ersten Entladeströmungspfad (44, 150) des zweiten Verschlusses (30) angeordnet ist,
    wobei ein Raum zwischen einer inneren Umfangswandfläche (10c) des zylindrischen Gehäuses (10) und dem porösen zylindrischen Körper (50) eine Rauchschleiererzeugungsstoffaufnahmekammer (55) ist, die den Rauchschleiererzeugungsstoff (56) aufnimmt, und das Entladeloch (24) für das Zündungsprodukt der Rauchschleiererzeugungsstoffaufnahmekammer (55) zugewandt ist, und
    wobei zu der Zeit der Aktivierung des Zünders (5) der Rauchschleiererzeugungsstoff (56) in der Rauchschleiererzeugungsstoffaufnahmekammer (55) gezündet und verbrannt wird, um eine Rauchschleierquelle zu erzeugen, sich die Rauchschleierquelle durch ein Inneres des porösen zylindrischen Körpers (50) bewegt, durch den ersten Entladeströmungspfad (44, 150), die erste Entladeöffnung (150a) und den zweiten Entladeströmungspfad (151) verläuft, und danach von der finalen Entladeöffnung (152) zu der Außenseite entladen wird, um einen Rauchschleier zu erzeugen.
     
    5. Der Rauchschleiergenerator (1, 1A) nach irgendeinem von Ansprüchen 1 bis 4, wobei der poröse zylindrische Körper (50) ein in eine zylindrische Gestalt geformtes Netz ist.
     
    6. Der Rauchschleiergenerator (1, 1A) nach irgendeinem von Ansprüchen 1 bis 5, wobei ein zentraler Abschnitt des ersten Verschlusses (20), an dem die Entladelöcher (24) des Zündungsprodukts nicht vorgesehen sind, einen vorstehenden Abschnitt (23) aufweist,
    eine Oberfläche des zweiten Verschlusses (30) an einer Position, die dem vorstehenden Abschnitt (23) des ersten Verschlusses (20) in der axialen Richtung zugewandt ist, einen ersten Entladeströmungspfad (44, 45, 46, 150) aufweist, und
    eine Endöffnung (50a) des porösen zylindrischen Körpers (50) auf eine äußere Seite des vorstehenden Abschnitts (23) des ersten Verschlusses (20) gepasst ist, und die andere Endöffnung (50b) davon an eine innere Seite des ersten Entladeströmungspfades (44, 45, 46, 150) des zweiten Verschlusses (30) gepasst ist, um den porösen zylindrischen Körper (50) zu befestigen.
     


    Revendications

    1. Générateur d'écran de fumée (1) comprenant un boîtier cylindrique (10), un dispositif d'allumage (5) et un agent générateur d'écran de fumée (56) qui sont logés dans le boîtier cylindrique (10),
    une première fermeture (20) comprenant le dispositif d'allumage (5) et fermant une première ouverture d'extrémité (10a) du boîtier cylindrique (10),
    une seconde fermeture (30) ayant un premier trajet d'écoulement de décharge (44, 45, 46) et un premier orifice de décharge (46a), qui est une sortie du premier trajet d'écoulement de décharge (44, 45, 46), et fermant une seconde ouverture d'extrémité (10b) du boîtier cylindrique (10) sur un côté opposé dans une direction axiale à la première ouverture d'extrémité (10a),
    un élément de changement de trajet d'écoulement (60) pour une source d'écran de fumée étant fixé à un côté extérieur de la seconde fermeture (30),
    un second trajet d'écoulement de décharge (47) étant prévu entre la seconde fermeture (30) et l'élément de changement de trajet d'écoulement (60) et en communication avec la sortie (46a) du premier trajet d'écoulement de décharge (44, 45, 46), et une sortie du second trajet d'écoulement de décharge (47) étant un orifice de décharge final (48a, 48b, 48c, 48d),
    le premier trajet d'écoulement de décharge (44, 45, 46) étant étendu dans une direction coaxiale avec le boîtier cylindrique (10) et le second trajet d'écoulement de décharge (47) étant étendu dans une direction différente de celle du premier trajet d'écoulement de décharge (44, 45, 46),
    la première fermeture (20) ayant un trou de décharge (24) pour décharger un produit d'allumage qui est généré au moment de l'actionnement du dispositif d'allumage (5), un corps cylindrique poreux (50) étant agencé entre une surface de la première fermeture (20) où le trou de décharge (24) pour le produit d'allumage n'est pas prévu et le premier trajet d'écoulement de décharge (44, 45, 46) de la seconde fermeture (30),
    un espace entre une surface de paroi circonférentielle intérieure (10c) du boîtier cylindrique (10) et le corps cylindrique poreux (50) étant une chambre de réception d'agent de génération d'écran de fumée (55) qui reçoit l'agent de génération d'écran de fumée (56), et le trou de décharge (24) pour le produit d'allumage faisant face à la chambre de réception d'agent de génération d'écran de fumée (55), et
    au moment de l'actionnement du dispositif d'allumage (5), l'agent de génération d'écran de fumée (56) dans la chambre de réception d'agent de génération d'écran de fumée (55) est allumé et brûlé pour générer une source d'écran de fumée, la source d'écran de fumée se déplaçant à travers un intérieur du corps cylindrique poreux (50), passant par le premier trajet d'écoulement de décharge (44, 45, 46), le premier orifice de décharge (46a) et le second trajet d'écoulement de décharge (47), et étant ensuite déchargée à partir de l'orifice de décharge final (48a, 48b, 48c, 48d) vers l'extérieur pour générer un écran de fumée.
     
    2. Générateur d'écran de fumée (1) selon la revendication 1, dans lequel le premier trajet d'écoulement de décharge (44, 45, 46) qui est prévu dans la seconde fermeture (30) est étendu dans une direction coaxiale avec le boîtier cylindrique (10), et
    le second trajet d'écoulement de décharge (47) entre la seconde fermeture (30) et l'élément de changement de trajet d'écoulement (60) est étendu dans une direction orthogonale au premier trajet d'écoulement de décharge (44, 45, 46).
     
    3. Générateur d'écran de fumée (1) selon la revendication 1 ou 2, dans lequel le second trajet d'écoulement de décharge (47) est prévu entre la seconde fermeture (30) et l'élément de changement de trajet d'écoulement (60), et en communication avec une sortie. (46a) du premier trajet d'écoulement de décharge (44, 45, 46),
    un trou traversant (49a, 49b, 49c, 49d), qui pénètre dans l'élément de changement de trajet d'écoulement (60) dans une direction d'épaisseur et atteint le second trajet d'écoulement de décharge (47), est prévu,
    une sortie annulaire du second trajet d'écoulement de décharge (47) est un premier orifice de décharge final (48a, 48b, 48c, 48d) et le trou traversant (49a, 49b, 49c, 49d) est un second orifice de décharge final, et
    le premier orifice d'évacuation final (48a, 48b, 48c, 48d) et le second orifice d'évacuation final (49a, 49b, 49c, 49d) sont ouverts et fermés pour commander une direction de décharge d'une source d'écran de fumée.
     
    4. Générateur d'écran de fumée (1A) comprenant un boîtier cylindrique (10), un dispositif d'allumage (5) et un agent générateur d'écran de fumée (56) qui sont reçus dans le boîtier cylindrique (10),
    une première fermeture (20) comprenant le dispositif d'allumage (5) et fermant une première ouverture d'extrémité (10a) du boîtier cylindrique (10),
    une seconde fermeture (30) ayant un premier trajet d'écoulement de décharge (44, 150) et un premier orifice de décharge (150a), qui est une sortie du premier trajet d'écoulement de décharge (44, 150), et fermant une seconde ouverture d'extrémité (10b) du boîtier cylindrique (10) sur un côté opposé dans une direction axiale à la première ouverture d'extrémité (10a),
    un élément de changement de trajet d'écoulement (160) pour une source d'écran de fumée étant fixé à un côté extérieur de la seconde fermeture (30) à un intervalle à partir de la seconde fermeture (30) dans la direction axiale,
    l'élément de changement de trajet d'écoulement (160) étant sensiblement en forme de coupelle et ayant une partie inférieure (161) et une paroi circonférentielle (162),
    la seconde fermeture (30) ayant une forme telle qu'un second trajet d'écoulement de décharge continu (151) est formé entre la seconde fermeture (30) et la partie inférieure (161) de l'élément de changement de trajet d'écoulement (60), entre la seconde fermeture (30) et une surface circonférentielle intérieure de la paroi circonférentielle (162) de l'élément de changement de trajet d'écoulement (160), entre la seconde fermeture (30) et une surface d'extrémité annulaire (163) d'une ouverture de l'élément de changement de trajet d'écoulement (160), et entre la seconde fermeture (30) et une surface circonférentielle extérieure de la paroi circonférentielle (162) de l'élément de changement de trajet d'écoulement (160),
    le premier trajet d'écoulement de décharge (44, 150), qui est prévu dans la seconde fermeture (30), étant étendu dans une direction coaxiale avec le boîtier cylindrique (10),
    le second trajet d'écoulement de décharge (151) étant prévu entre la seconde fermeture (30) et l'élément de changement de trajet d'écoulement (160) et étant en communication avec le premier trajet d'écoulement de décharge (44, 150), étendu dans une direction orthogonale au premier trajet d'écoulement de décharge (44, 150) et en outre courbé en une pluralité d'emplacements, et une sortie du second trajet d'écoulement de décharge (151) étant un orifice de décharge final (152),
    la première fermeture (20) ayant un trou de décharge (24) pour décharger un produit d'allumage qui est généré au moment de l'actionnement du dispositif d'allumage (5), un corps cylindrique poreux (50) étant agencé entre une surface de la première fermeture (20) où le trou de décharge (24) pour le produit d'allumage n'est pas prévu et le premier trajet d'écoulement de décharge (44, 150) de la seconde fermeture (30), un espace entre une surface de paroi circonférentielle intérieure (10c) du boîtier cylindrique (10) et le corps cylindrique poreux (50) étant une chambre de réception d'agent de génération d'écran de fumée (55) qui reçoit l'agent de génération d'écran de fumée (56), et le trou d'évacuation (24) pour le produit d'allumage faisant face à la chambre de réception d'agent de génération d'écran de fumée (55), et
    au moment de l'actionnement du dispositif d'allumage (5), l'agent de génération d'écran de fumée (56) dans la chambre de réception d'agent de génération d'écran de fumée (55) est allumé et brûlé pour générer une source d'écran de fumée, la source d'écran de fumée se déplaçant à travers un intérieur du corps cylindrique poreux (50), passant par le premier trajet d'écoulement de décharge (44, 150), le premier orifice de décharge (150a) et le second trajet d'écoulement de décharge (151), et étant ensuite déchargé à partir de l'orifice de décharge final (152) vers l'extérieur afin de générer un écran de fumée.
     
    5. Générateur d'écran de fumée (1, 1A) selon l'une quelconque des revendications 1 à 4, dans lequel le corps cylindrique poreux (50) est un treillis moulé en une forme cylindrique.
     
    6. Générateur d'écran de fumée (1, 1A) selon l'une quelconque des revendications 1 à 5, dans lequel une partie centrale de la première fermeture (20), où les trous de décharge (24) du produit d'allumage ne sont pas prévus, présente un partie saillante (23),
    une surface de la seconde fermeture (30), dans une position qui fait face à la partie saillante (23) de la première fermeture (20) dans la direction axiale, a un premier trajet d'écoulement de décharge (44, 45, 46, 150), et
    une première ouverture d'extrémité (50a) du corps cylindrique poreux (50) est ajustée sur un côté extérieur de la partie saillante (23) de la première fermeture (20) et l'autre ouverture d'extrémité (50b) de celui-ci est ajustée sur un côté intérieur du premier trajet d'écoulement de décharge (44, 45, 46, 150) de la seconde fermeture (30) pour fixer le corps cylindrique poreux (50).
     




    Drawing














    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description