(19)
(11)EP 3 363 759 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
06.05.2020 Bulletin 2020/19

(21)Application number: 15906210.8

(22)Date of filing:  13.10.2015
(51)International Patent Classification (IPC): 
B66B 5/04(2006.01)
(86)International application number:
PCT/JP2015/078870
(87)International publication number:
WO 2017/064745 (20.04.2017 Gazette  2017/16)

(54)

ELEVATOR DEVICE

AUFZUGSVORRICHTUNG

DISPOSITIF D'ASCENSEUR


(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

(43)Date of publication of application:
22.08.2018 Bulletin 2018/34

(73)Proprietor: Hitachi, Ltd.
Chiyoda-ku Tokyo 100-8280 (JP)

(72)Inventors:
  • KUBO Yosuke
    Tokyo 100-8280 (JP)
  • HIRANO Kaoru
    Tokyo 100-8280 (JP)
  • NAKAYAMA Tetsuya
    Tokyo 100-8280 (JP)
  • TANAKA Yudai
    Tokyo 100-8280 (JP)

(74)Representative: MERH-IP Matias Erny Reichl Hoffmann Patentanwälte PartG mbB 
Paul-Heyse-Strasse 29
80336 München
80336 München (DE)


(56)References cited: : 
WO-A1-2010/084564
JP-A- 2002 020 056
JP-A- 2006 143 394
JP-A- 2001 080 838
JP-A- 2006 143 394
US-B2- 8 453 799
  
      
    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 an elevator device, and more particularly, to an elevator device provided with a governor device to operate an emergency stop device.

    Background Art



    [0002] In general, an elevator device is provided with a governor device to electrically stop a hoisting device for a car when an elevating speed of the car becomes a first set value. When a descending speed of the car becomes a second set value, the governor device operates an emergency stop device to mechanically stop the car.

    [0003] In a recent governor device, a ratchet type small governor device is used. For example, Japanese Patent Application Laid-Open No. 2012-188260 (Patent Literature 1) shows a ratchet type governor device.

    [0004]  The governor device mainly has a ratchet wheel and two fly weights. When the fly weights rotated along with a sheave which a rope is put around move so as to be opened outward by a centrifugal force (hereinbelow, referred to as "fly-away"), a pawl (ratchet) attached to an end of the fly weight is meshed with ratchet teeth of the ratchet wheel. When the pawl of the fly weight is meshed with the ratchet teeth of the ratchet wheel, the ratchet wheel is rotated with the sheave. A brake shoe driven by the rotation of the ratchet wheel applies a braking force to the governor rope between the brake shoe and the sheave to operate the emergency stop device.
    Furthermore, patent literature 2 shows a speed governor for an elevator in which a governor sheave is rotatably supported in a case. An endless governor rope connected with a car is wound around and hung on the outer peripheral part of the governor sheave. A speed detection switch is installed in the vicinity of the governor sheave. In the governor sheave, a flyweight constituted by combining a plurality of member is rotatably supported, and is rotated due to centrifugal force when the governor sheave is rotated. A switch operation part abutting on and operating the speed detection switch when the rotational speed of the governor sheave exceeds a predetermined value is provided above the flyweight.

    Citation List


    Patent Literature



    [0005] 

    PTL 1: Japanese Patent Laid-Open No. 2012-188260

    PTL 2: JP 2006 143394 A


    Summary of Invention


    Technical Problem



    [0006] In the ratchet type governor device as disclosed in the Patent Literature 1, the fly weight is provided in an outer peripheral part of the ratchet wheel. The pawl is attached to the end of the fly weight. When the pawl of the fly weight enters a root part of one of the plural ratchet teeth formed on the outer periphery of the ratchet wheel, by fly-away of the fly weight, then the pawl is meshed with the ratchet teeth and the ratchet wheel is rotated.

    [0007] As described above, there is a tendency that the governor device is downsized, then a ratchet wheel having a small diameter is used, and the inertia mass of the ratchet wheel is also reduced. However, when the inertia mass of the ratchet wheel is smaller than the inertia mass of the fly weight, upon collision between the ratchet teeth of the ratchet wheel and the pawl of the fly weight by flay-away of the fly weight, a phenomenon that the ratchet wheel is flipped with the pawl of the fly weight may occur.

    [0008] With this phenomenon, it is not possible to realize excellent meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. This may cause adverse effects such as delay of the operation of the emergency stop device. Accordingly, there is a strong need for development of a governor device to infallibly mesh the ratchet teeth of the ratchet wheel with the pawl of the fly weight.

    [0009]  The object of the present invention is to provide an elevator device having a novel governor device to infallibly realize meshing between ratchet teeth of a ratchet wheel and a pawl of a fly weight.

    Solution to Problem



    [0010] The above problem is solved by the subject matter of the appended claims. In particular with a weight support shaft to rotatably support a fly weight for fly-away of the fly weight as a border, a pawl to be meshed with a ratchet teeth of a ratchet wheel is attached to one region side of the fly weight, while an inertia mass adjusting unit having a shape to adjust the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, is provided on the other region side of the fly weight.

    Advantageous Effects of Invention



    [0011] According to the present invention, by adjusting the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, it is possible to infallibly realize meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. With this configuration, it is possible to eliminate the adverse effects such as delay of the operation of the emergency stop device.

    Brief Description of Drawings



    [0012] 

    Figure 1 is a side view showing main parts of a governor device to which the present invention is applied.

    Figure 2 is a rear view of a fly weight according to an embodiment of the present invention viewed from the rear side.

    Figure 3 is a side view showing positional relationship between a ratchet wheel and the fly weight according to the embodiment of the present invention.

    Figure 4A is a front view of the fly weight according to the embodiment of the present invention.

    Figure 4B is a side view of the fly weight according to the embodiment of the present invention.


    Description of Embodiment



    [0013] Next, an embodiment of the present invention will be described in detail using the drawings. The present invention is not limited to the following embodiment, but includes various modifications and applications in the technical conception of the present invention in its scope.

    [0014]  Figure 1 shows a governor device 10 to which the present invention is applied. The governor device 10 has a frame 12 placed on a governor base 11. A sheave 14 is rotatably supported inside the frame 12 via a sheave shaft 13. A governor rope 15 is put around the sheave 14. The governor rope 15 runs integrally with a car of the elevator. With the running, the sheave 14 is rotated about the sheave shaft 13.

    [0015] A ratchet wheel 16 is provided on one side surface side of the sheave 14. The ratchet wheel 16 is supported with the sheave shaft 13, and is rotated about the sheave shaft 13 separately from the sheave 14. Plural ratchet teeth 17 are formed at an equal angle on the outer periphery of the ratchet wheel 16. The ratchet teeth 17 are inclined in a rotation direction. With this configuration, the ratchet wheel 16 is rotated in one direction.

    [0016] Further, a pair of fly weights 18A and 18B are provided on the same side surface side of the sheave 14 where the ratchet wheel 16 is provided. These fly weights 18A and 18B are provided approximately symmetrically opposite to each other with the ratchet wheel 16 between them. The fly weights are respectively rotatably attached to the side surface of the sheave 14 via a weight support shaft (not shown).

    [0017] Further, one of the fly weights 18A and 18B (the fly weight 18A in the present embodiment) is provided with a pawl (ratchet) 28 to be meshed with the ratchet teeth 17 of the ratchet wheel 16. The fly weights 18A and 18B and the ratchet wheel 16 will be described in detail in Figure 2 and the subsequent figures.

    [0018] The ratchet wheel 16 is connected to a brake mechanism 19. The brake mechanism 19 has a brake arm 20. One end of the brake arm 20 is rotatably connected to the frame 12 via a pin 21. A connecting rod 22 is inserted through the other end of the brake arm 20. One end of the connecting rod 22 is rotatably connected via a pin (not shown) to one side surface of the ratchet wheel 16.

    [0019] A brake spring 23 is provided between the other end of the connecting rod 22 and the brake arm 20. Further, a brake shoe 24 is attached to an intermediate part of the brake arm 20. The brake shoe 24 is provided to be opposite to the governor rope 15 put around the sheave 14. When the ratchet wheel 16 is rotated in a counterclockwise direction in Figure 1 and the connecting rod 22 is pulled, the brake spring 23 is compressed. With the compressive force, the brake shoe 24 is pressed via the brake arm 20 against the governor rope 15. With this pressing force, a braking force is applied to the governor rope 15 with the brake shoe 24 and the sheave 14.

    [0020] A car stop switch 25 to generate a switch signal to operate a braking mechanism of an unshown hoisting device is attached in the vicinity of the sheave 14. The car stop switch 25 is configured such that when an elevating speed of the car becomes a first set value, e.g. 1.3 times of a rated speed, a switch mechanism of the car stop switch 25 is operated with a convex member formed at an end on the opposite side to the side of the fly weights 18A and 18B.

    [0021] Further, when it is detected with the fly weights 18A and 18B that a descending speed of the car becomes a second set value, e.g. 1.4 times of a rated speed, the brake mechanism 19 operated with the ratchet wheel 16 applies a braking force to the governor rope 15, to operate the emergency stop device, to stop the car.

    [0022] In the governor device having the above configuration, upon running of the elevator device, the governor rope 15 runs integrally with the car. With this running, the sheave 14 is rotated about the sheave shaft 13. At this time, the ratchet wheel 16 is not rotated. When the car moves downward, the sheave 14 is rotated in the counterclockwise direction. Then, when the car moves downward at a speed beyond a rated speed, the rotational speed of the sheave 14 is increased. The fly weights 18A and 18B are rotated, with the centrifugal force of the rotation of the sheave, about the weight support shaft and fly away outward. With this fly-away operation, the pawl 28 of one of the fly weights i.e. the fly weight 18A, is meshed with the ratchet teeth 17 of the ratchet wheel 16. With this meshing, the ratchet wheel 16 is rotated integrally with the sheave 14, about the sheave shaft 13, in the counterclockwise direction.

    [0023] The rotation operation of the ratchet wheel 16 is transmitted via the connecting rod 22 to the brake mechanism 19. With this transmission, the brake mechanism 19 is operated, the governor rope 15 put around the sheave 14 is pressed against the sheave 14, and the running of the governor rope 15 is stopped. Then with the stoppage of the governor rope 15, the emergency stop device of the car which is moving down is operated, then a braking force is applied to the car, and the downward movement of the car is stopped. Thus safety is ensured.

    [0024] Then as described above, in a case where the inertia mass of the ratchet wheel 16 is smaller than the inertia mass of the fly weight 18A provided with the pawl 28, when the ratchet teeth 17 of the ratchet wheel 16 collides with the pawl 28 of the fly weight 18A by fly-away of the fly weight 18A, a phenomenon that the ratchet wheel 16 is flipped with the pawl 28 of the fly weight 18A occurs. Accordingly, it is not possible to realize excellent meshing between the ratchet teeth 17 of the ratchet wheel 16 and the pawl 28 of the fly weight 18A. This may cause adverse effects such as delay of the operation of the emergency stop device.

    [0025] Accordingly, in the present embodiment, to reduce the inertial mass of the fly weight 18A provided with the pawl 28, proposed is a configuration in which the pawl 28 to be meshed with the ratchet teeth 17 of the ratchet wheel 16 is attached to one region side of the fly weight 18A, further, an inertia mass adjusting unit to adjust the inertia mass of the fly weight 18A to that equivalent to or smaller than the inertia mass of the ratchet wheel 16, is formed on the other region side of the fly weight 18A.

    [0026] Hereinbelow, the fly weight used in the governor device according to the present embodiment will be described in detail using Figure 2 to Figure 4B.

    [0027] In Figure 2 to Figure 4B, a support base 26 integrally connected to the sheave 14 is rotatably supported with the sheave shaft 13. Weight support shafts 27A and 27B are planted on the surface of a part of the support base 26 positioned on the outside of the unshown ratchet wheel 16. The fly weights 18A and 18B are formed in approximately the same shape, and respectively rotatably supported with the respective weight support shafts 27A and 27B in predetermined positions.

    [0028] The fly weights 18A and 18B are formed in an elongated approximate fan shape, provided in point-symmetrical positions with the sheave shaft 13 as a center, and have regions with different arm lengths from the respective weight support shafts 27A and 27B. That is, as shown in Figure 3, in the fly weight 18A, with the weight support shaft 27A as a border, a short arm-length region SA (=one region) and a long arm-length region LA (= other region) are formed. With this configuration, the long arm-length region LA of the fly weight 18A moves outward by a centrifugal force. On the other hand, the short arm-length region SA of the fly weight 18A moves inward. Note that the fly weight 18B has approximately the same configuration and performs the same operation.

    [0029] In the fly weight 18A, the pawl 28, to be disengageably meshed with the ratchet teeth 17 of the ratchet wheel 16, is attached to an end of the region SA with the short arm-length from the weight support shaft 27A. Further, in the fly weight 18A, a protruding part 29A to operate the car stop switch 25 is provided at an end of the region LA with the long arm-length from the weight support shaft 27A. Note that the short arm-length region SA is provided with a pawl attachment part to which the pawl 28 is attached, and the long arm-length region LA is provided with an inertia mass adjusting unit to reduce the inertia mass of the fly weight 18A. This inertia mass adjusting unit will be described later.

    [0030] Note that the pawl 28 is not attached to the short arm-length region SA of the other fly weight 18B. A protruding part 29B to operate the car top switch 5 is provided at an end of the long arm-length region LA. Accordingly, one of the protruding parts 29A and 29B operates the car stop switch 5.

    [0031] Further, an intermediate part of the long arm-length region LA on the fly weight 18A side and an intermediate part of the short arm-length region SA on the fly weight 18B are connected to the connecting member 31 with pins 30A and 30B. The connecting member 31 performs an action to interlock motions of the fly weight 18A and the fly weight 18B. Further, a spring member with adjustment function 32 is provided at the end of the short arm-length region SA of the fly weight 18A and the end formed in the vicinity of the center of the support base 26, to adjust meshing with the pawl 28 of the fly weight 18A.

    [0032] As shown in Figure 2 and Figure 3, in a normal status, the pawl 28 of the fly weight 18A is in a position away from the ratchet wheel 16, and the ratchet teeth 17 and the pawl 28 are not meshed with each other.
    Then, when the elevating speed of the car becomes the first set value, e.g., 1.3 times of the rated speed, the fly weights 18A and 18B receive a centrifugal force. The long arm-length regions LA fly away outward with the respective weight support shafts 27A and 27B as centers. On the other hand, the short arm-length regions SA move inward.

    [0033] In this manner, the protruding parts 29A and 29B of the fly weights 18A and 18B are rotated in directions away from the ratchet wheel 16. With this configuration, the protruding parts 29A and 29B are protruded to the outside from their normal status, and one of the protruding parts 29A and 29B operates the car stop switch 5 shown in Figure 1.

    [0034] Similarly, when the descending speed of the car becomes the second set value, e.g. 1.4 times of the rated speed, the fly weights 18A and 18B receive a larger centrifugal force. The long arm-length regions LA fly away further outward with the weight support shafts 27A and 27B as centers. On the other hand, the short arm-length regions SA move inward.

    [0035] With this configuration, the pawl 28 provided at the end of the short arm-length region SA of the fly weight 18A is meshed with the ratchet teeth 17 of the ratchet wheel 163. The ratchet wheel 16 is rotated in the counterclockwise direction in synchronization with the fly weights 18A and 18B, and the sheave 14, to operate the brake mechanism 19.

    [0036] When the fly weights 18A and 18B are provided on the outer periphery of the ratchet wheel 16 to downsize the governor device 10, as shown in Figure 4A, it is necessary to reduce a distance a from the center of the weight support shaft 27A of the fly weight 18A to a meshing part of the pawl 28.

    [0037] On the other hand, when the elevating speed of the car becomes the first set value, to operate the car stop switch 25 on the outside of the sheave 14, it is necessary to increase a distance b from the center of the weight support shaft 27A of the fly weight 18A to the protruding part 29A. Naturally the area of the long arm-length region LA is increased, and in accordance with the increase of the area, the inertia mass is increased. Accordingly the inertia moment of the fly weight 18A is increased.

    [0038] Assuming that the inertia moment of the fly weight 18A is Io, and the distance from the center of the weight support shaft 27A to the end of the pawl 28 is a, the inertia mass m of the fly weight 18A is obtained with an expression, m = Io/a2. Accordingly, when the distance b from the center of the weight support shaft 27A to the protruding part 29A is increased, further, the distance a from the center of the weight support shaft 27A to the mashing part of the pawl 28 is reduced, from the above expression, the inertia mass of the fly weight 18A is increased. Accordingly, in comparison with the inertia mass of the ratchet wheel 16, the inertia mass of the fly weight 18A is increased.

    [0039] Accordingly, as shown in Figure 3, by the fly-away of the fly weight 18A, upon collision between the ratchet teeth 17 of the ratchet wheel 16 and the pawl 28 of the fly weight 18A, a phenomenon that the ratchet wheel 16 is flipped with the pawl 28 of the fly weight 18A occurs.

    [0040] As shown in Figure 2 to Figure 4B, in the present embodiment, with the weight support shaft 27A of the fly weight 18A as a border, an inertia mass adjusting unit 33A is formed in the long arm-length region LA, to reduce the inertia mass of this part.

    [0041] In the present embodiment, the inertia mass adjusting unit 33A is provided with a thin part 34A and a through hole 35A. As shown in Figure 3, in the fly weight 18A, with a support hole 36A through which the weight support shaft 27A is inserted as a border, the short arm-length region SA (= one region) and the long arm-length region LA (= other region) are formed.

    [0042] Then the inertia mass adjusting unit 33A is formed in a part of the long arm-length region LA. The thickness of the inertia mass adjusting unit 33A is thinner in comparison with the thickness of the long arm-length region LA and the short arm-length region SA other than the inertia mass adjusting unit 33A. Accordingly, the mass is reduced by the thinned thin part 34A. Further, a through hole 35A is formed in the thin part 34A, and the mass is further reduced by the through hole 35A. The thin part 34A and the through hole 35A are formed in adjusting shapes to reduce the inertia mass of the fly weight 18A.

    [0043] In this manner, as the inertia mass adjusting unit 33A is formed in a part of the long arm-length region LA, it is possible to reduce the inertia moment of the fly weight 18A. Even when the distance b from the center of the weight support shaft 27A to the protruding part 29A is increased and the distance a from the center of the weight support shaft 27A to the meshing part of the pawl 28 is reduced, it is possible to reduce the inertia mass of the fly weight 18A.

    [0044] Note that the mass reduced with the inertia mass adjusting unit 33A is determined such that the inertia mass of the fly weight 18A becomes equivalent to or smaller than the inertia mass of the ratchet wheel 16. Note that in the present embodiment, it is determined such that the inertia mass of the fly weight 18A becomes smaller than the inertia mass of the ratchet wheel 16.

    [0045] Further, the inertia mass adjusting unit 33B is formed in a part of the long arm-length region LA of the fly weight 18B. With this configuration, it is possible to maintain balance between the inertia mass of the fly weight 18B and the inertia mass of the fly weight 18A. In the inertia mass adjusting unit 33B, a thin part 34B and a through hole 35B are formed. The fly weight 18A and the fly weight 18B have approximately the same shape. As the pawl 28 is not attached to the fly weight 18B, the fly weight 18A and the fly weight 18B do not have completely the same shape.

    [0046] Further, the inertia mass adjusting units 33A and 33B including the thin parts 34A and 34B and the through holes 35A and 35B do not have completely the same shape. In this manner, there is no problem as long as the inertia mass of the fly weight 18A and the inertia mass of the fly weight 18B balance. Thus there is no problem as long as their shapes are similar.

    [0047] In this manner, in the present embodiment, the inertia mass of the fly weight 18A is smaller than the inertia mass of the ratchet wheel. Upon collision between the ratchet teeth 17 of the ratchet wheel 16 and the pawl 28 of the fly weight 18A by the fly-away of the fly weight 18A, it is possible to suppress the phenomenon that the ratchet wheel 16 is flipped with the pawl 28 of the fly weight 18A.

    [0048] Accordingly, it is possible to realize excellent meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight, and eliminate occurrence of adverse effects such as delay of the operation of the emergency stop device.

    [0049] Then, it is confirmed by the inventors' study that as long as the thickness of the thin parts 34A and 34B of the inertia mass adjusting units 33A and 33B is equal to or smaller than about 2/3 of the thickness of the long arm-length region LA and the short arm-length region SA other than the inertia mass adjusting units 33A and 33B, it is possible to sufficiently reduce the inertia mass. Note that in the present embodiment, the thickness of the thin parts 34A and 34B of the inertia mass adjusting units 33A and 33B is determined to be about 1/2 in comparison with the thickness of the long arm-length region LA and the short arm-length region SA other than the inertia mass adjusting units 33A and 33B.

    [0050] Note that the large rotation force from the sheave 14 is given via the weight support shaft 27A and the short arm-length region SA of the fly weight 18A to the pawl 28. Accordingly, it is advantageous to increase the thickness of the short arm-length region SA as in the case of the present embodiment. On the other hand, in the long arm-length region LA, as the large force from the sheave 14 does not act, there is no problem to reduce the thickness to reduce the inertia mass.

    [0051] Further, it is confirmed by the inventors' study that it is possible to sufficiently reduce the inertia mass as long as the diameter of the through hole 35A of the inertia mass adjusting unit 33A is equal to or longer than about 13 mm. Note that the shape of the through hole 35A has a round shape, however, even a polygonal shape or elliptic shape other than the round shape is applicable as the through hole 35A. Further, there is no problem that it is not a through hole but e.g. a bottomed concave shape.

    [0052] Further, it is advantageous that the inertia mass adjusting unit 33A is formed at least on the end side from a portion where the pin 30A connecting the connecting member 31 to the fly weight 18A is provided. With this configuration, an attachment surface of the connecting member 31 is set at the same height in the fly weights 18A and 18B. In a case where the pin 30A is provided in the thin inertia mass adjusting unit 33A in the fly weight 18A, as the fly weight 18B side is the thick short arm-length region SA, the connecting member 31 is attached in an inclined status. This is disadvantageous attachment status in the mechanism.

    [0053] Note that in the present embodiment, the inertia mass adjusting unit 33A is formed with the thin part 34A and the through hole 35A. It goes without saying that the inertia mass adjusting unit 33A may be formed with only one of the thin part 34A and the through hole 35A.

    [0054] As described above, in the present invention, with the weight support shaft which rotatably supports the fly weight for fly-away of the fly weight as a border, the pawl meshed with the ratchet teeth of the ratchet wheel is attached to one region side of the fly weight. Then the inertia mass adjusting unit having a shape to adjust the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel is provided on the other region side of the fly weight.

    [0055]  In this manner, by adjusting the inertia mass of the fly weight to that equivalent to or smaller than the inertia mass of the ratchet wheel, it is possible to infallibly realize meshing between the ratchet teeth of the ratchet wheel and the pawl of the fly weight. With this configuration, it is possible to eliminate adverse effects such as delay of the operation of the emergency stop device.

    [0056] Note that the present invention is not limited to the above-described embodiment, but various modifications are included. For example, the above embodiment has been described in detail for explaining the present invention, and the invention is not necessarily limited to an embodiment having all the described constituent elements. Further, a part of constituent element of an embodiment may be replaced with those of another embodiment. Further, constituent elements of an embodiment may be added to those of another embodiment. Further, it is possible to perform addition/deletion/replacement with respect to a part of constituent elements of the respective embodiments with other constituent elements.

    Reference Signs List



    [0057] 
    10:
    governor device,
    11:
    base,
    12:
    frame,
    13:
    sheave shaft,
    14:
    sheave,
    15:
    governor rope,
    16:
    ratchet wheel,
    17:
    ratchet teeth,
    18A, 18B:
    fly weight,
    19:
    brake mechanism,
    20:
    brake arm,
    21:
    pin,
    22:
    connecting rod,
    23:
    brake spring,
    24:
    brake shoe,
    25:
    car stop switch,
    26:
    support base,
    27A, 27B:
    weight support shaft,
    28:
    pawl,
    29A, 29B:
    protruding part,
    30A, 30B:
    pin,
    31:
    connecting member,
    32:
    spring member with adjustment function,
    33A, 33B:
    inertia mass adjusting unit,
    34A, 34B:
    thin part,
    35A, 35B:
    through hole.



    Claims

    1. An elevator device having a governor device (10), comprising:

    a sheave (14), which a governor rope (15) is put around, and which is rotated by movement of the governor rope (15) in accordance with elevation of a car;

    a ratchet wheel (16) which is rotatably supported with a rotary shaft of the sheave (14) and which has a plurality of ratchet teeth (17) on an outer periphery;

    a fly weight which is provided on the outer periphery of the ratchet wheel (16) and which is rotated by a centrifugal force caused by rotation of the sheave (14);

    a pawl (28) which is attached to an end of the fly weight and which is disengageably meshed with the ratchet teeth (17) of the ratchet wheel (16); and

    a brake mechanism (19), which is connected to the ratchet wheel (16), and in which when the car descends at a speed beyond a rated speed, the pawl (28) of the fly weight is engaged with the ratchet teeth (17) of the ratchet wheel (16), to act a braking force on the governor rope (15),

    wherein the fly weight is rotatably supported with a weight support shaft (27A, 27B) integrally rotated with the sheave (14), characterized in that

    with the weight support shaft (27A, 27B) as a border, the pawl (28) meshed with the ratchet teeth (17) of the ratchet wheel (16) is attached to one region side of the fly weight, and an inertia mass adjusting unit (33A, 33B) having a shape to adjust inertia mass of the fly weight to that equivalent to or smaller than inertia mass of the ratchet wheel (16) is provided on other region side of the fly weight.
     
    2. The elevator device according to claim 1, wherein the inertia mass adjusting unit (33A, 33B) is formed with a thin part (34A, 34B) thinner than the thickness of the one region side of the fly weight, or a through hole (35A, 35B), or the thin part (34A, 34B) and the through hole (35A, 35B).
     
    3. The elevator device according to claim 2, wherein the thin part (34A, 34B) is formed to be equal to or thinner than about 2/3 of the thickness of the one region side of the fly weight.
     
    4. The elevator device according to claim 2, wherein the through hole (35A, 35B) is a round through hole having a diameter equal to or larger than 13 mm.
     
    5. The elevator device according to claim 1, wherein the fly weight is formed with a first fly weight (18A) and a second fly weight (18B) provided to be opposite to each other with the ratchet wheel (16) between them, and wherein the inertia mass adjusting unit (33A, 33B) is formed in both of the first fly weight (18A) and the second fly weight (18B).
     
    6. The elevator device according to claim 5, wherein the pawl (28) is attached only to the second fly weight (18B).
     
    7. The elevator device according to claim 5, wherein the first fly weight (18A) and the second fly weight (18B) are connected to each other with a connecting member (31), and wherein the connecting member (31) connects a pin (30A) provided in the one region of the first fly weight (18A) to a pin (30B) provided in the other region than the inertia mass adjusting unit (33B) in the second fly weight (18B).
     


    Ansprüche

    1. Hebevorrichtung mit einer Regulierungsvorrichtung (10), die Folgendes umfasst:

    eine Rolle (14), um die ein Regulierungsseil (15) gelegt ist und die durch eine Bewegung des Regulierungsseils (15) in Übereinstimmung mit dem Anheben eines Kraftfahrzeugs gedreht wird;

    ein Sperrrad (16), das von einer Drehwelle der Rolle (14) auf drehbare Weise getragen wird und das auf einem Außenumfang mehrere Sperrzähne (17) aufweist;

    ein Fliehgewicht, das auf dem Außenumfang des Sperrrads (16) vorgesehen ist und das durch eine Zentrifugalkraft gedreht wird, die durch die Drehung der Rolle (14) bewirkt wird;

    eine Sperrklinke (28), die an einem Ende des Fliehgewichts befestigt ist und die sich auf trennbare Weise mit den Sperrzähnen (17) des Sperrrads (16) in Eingriff befindet; und

    einen Bremsmechanismus (19), der mit dem Sperrrad (16) verbunden ist, wobei sich die Sperrklinke (28) des Fliehgewichts mit den Sperrzähnen (17) des Sperrrads (16) in Eingriff befindet, wenn sich das Kraftfahrzeug mit einer Geschwindigkeit jenseits einer Nenngeschwindigkeit absenkt, um als eine Bremskraft auf das Regulierungsseil (15) zu wirken,

    wobei das Fliehgewicht von einer Gewichtsträgerwelle (27A, 27B), die mit der Rolle (14) drehfest verbunden ist, drehbar getragen wird, dadurch gekennzeichnet, dass

    die Sperrklinke (28), die mit den Sperrzähnen (17) des Sperrrads (16) in Eingriff ist, mit der Gewichtsträgerwelle (27A, 27B) als einer Begrenzung an der Seite eines Bereichs des Fliehgewichts befestigt ist und eine Schwungmasseneinstelleinheit (33A, 33B), die eine Form aufweist, um die Schwungmasse des Fliehgewichts derart einzustellen, dass sie äquivalent zu oder kleiner als die Schwungmasse des Sperrrads (16) ist, an der Seite des anderen Bereichs des Fliehgewichts vorgesehen ist.


     
    2. Hebevorrichtung nach Anspruch 1, wobei die Schwungmasseneinstelleinheit (33A, 33B) aus einer dünnen Komponente (34A, 34B), die dünner als die Dicke der Seite des einen Bereichs des Fliehgewichts ist, oder aus einem Durchgangsloch (35A, 35B) oder aus der dünnen Komponente (34A, 34B) und aus dem Durchgangsloch (35A, 35B) gebildet ist.
     
    3. Hebevorrichtung nach Anspruch 2, wobei die dünne Komponente (34A, 34B) derart gebildet ist, dass sie gleich oder dünner als etwa 2/3 der Dicke der Seite des einen Bereichs des Fliehgewichts ist.
     
    4. Hebevorrichtung nach Anspruch 2, wobei das Durchgangsloch (35A, 35B) ein rundes Durchgangsloch ist, das einen Durchmesser größer oder gleich 13 mm aufweist.
     
    5. Hebevorrichtung nach Anspruch 1, wobei das Fliehgewicht aus einem ersten Fliehgewicht (18A) und einem zweiten Fliehgewicht (18B) gebildet ist, die derart vorgesehen sind, dass sie einander mit dem Sperrrad (16) dazwischen gegenüberliegen, und wobei die Schwungmasseneinstelleinheit (33A, 33B) sowohl im ersten Fliehgewicht (18A) als auch im zweiten Fliehgewicht (18B) gebildet ist.
     
    6. Hebevorrichtung nach Anspruch 5, wobei die Sperrklinke (28) lediglich am zweiten Fliehgewicht (18B) befestigt ist.
     
    7. Hebevorrichtung nach Anspruch 5, wobei das erste Fliehgewicht (18A) und das zweite Fliehgewicht (18B) mit einem Verbindungselement (31) miteinander verbunden sind und wobei das Verbindungselement (31) einen Stift (30A), der in dem einen Bereich des ersten Fliehgewichts (18A) vorgesehen ist, mit einem Stift (30B), der in dem anderen Bereich als die Schwungmasseneinstelleinheit (33B) im zweiten Fliehgewicht (18B) vorgesehen ist, verbindet.
     


    Revendications

    1. Dispositif élévateur ayant un dispositif régulateur (10), comprenant :

    une poulie (14) qui a un câble régulateur (15) placé autour d'elle, et qui est mise en rotation par un déplacement du câble régulateur (15) en accord avec une élévation d'un chariot ;

    une roue à rochet (16) qui est supportée en rotation avec un arbre rotatif de la poulie (14) et qui a une pluralité de dents de rochet (17) sur une périphérie extérieure ;

    une masse libre qui est prévue sur la périphérie extérieure de la roue à rochet (16) et qui est mise en rotation par une force centrifuge provoquée par une rotation de la poulie (14) ;

    un cliquet (28) qui est attaché à une extrémité de la masse libre et qui est engrené de manière à pouvoir être désengagé d'avec les dents de rochet (17) de la roue à rochet (16); et

    un mécanisme de freinage (19) qui est connecté à la roue à rochet (16) et dans lequel, quand le chariot descend à une vitesse au-delà d'une vitesse nominale, le cliquet (28) de la masse libre est engagé avec les dents de rochet (17) de la roue à rochet (16), pour appliquer une force de freinage sur le câble régulateur (15),

    dans lequel la masse libre est supportée en rotation avec un arbre de support de masse (27A, 27B) intégralement mis en rotation avec la poulie (14), caractérisé en ce que

    avec l'arbre de support de masse (27A, 27B) à titre de limiteur, le cliquet (28) engrené avec les dents de rochet (17) de la roue à rochet (16) est attaché à une région latérale de la masse libre, et une unité d'ajustement de masse d'inertie (33A, 33B) ayant une forme pour ajuster une masse d'inertie de la masse libre de manière à la rendre équivalente ou inférieure à une masse d'inertie de la roue à rochet (16) est prévue sur l'autre région latérale de la masse libre.


     
    2. Dispositif élévateur selon la revendication 1, dans lequel l'unité d'ajustement de masse d'inertie (33A, 33B) est formée avec une partie fine (34A, 34B) plus fine que l'épaisseur de ladite une région latérale de la masse libre, ou avec un trou traversant (35A, 35B), ou avec la partie fine (34A, 34B) et le trou traversant (35A, 35B).
     
    3. Dispositif élévateur selon la revendication 2, dans lequel la partie fine (34A, 34B) est formée pour être égale ou plus fine qu'environ 2/3 de l'épaisseur de ladite une région latérale de la masse libre.
     
    4. Dispositif élévateur selon la revendication 2, dans lequel le trou traversant (35A, 35B) est un trou traversant rond ayant un diamètre égal ou supérieur à 13 mm.
     
    5. Dispositif élévateur selon la revendication 1, dans lequel la masse libre est formée avec une première masse libre (18A) et une deuxième masse libre (18B) prévues pour être opposées l'une à l'autre avec la roue à rochet (16) entre elles, et dans lequel l'unité d'ajustement de masse d'inertie (33A, 33B) est formée à la fois dans la première masse libre (18A) et dans la deuxième masse libre (18B).
     
    6. Dispositif élévateur selon la revendication 5, dans lequel le cliquet (28) est attaché uniquement à la deuxième masse libre (18B).
     
    7. Dispositif élévateur selon la revendication 5, dans lequel la première masse libre (18A) et la deuxième masse libre (18B) sont connectées l'une à l'autre avec un élément de connexion (31), et dans lequel l'élément de connexion (31) connecte une broche (30A), prévue dans ladite une région de la première masse libre (18A), à une broche (30B), prévue dans ladite région autre que celle correspondant à l'unité d'ajustement de masse d'inertie (33B) dans la deuxième masse libre (18B).
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description