(19)
(11)EP 3 359 753 B1

(12)EUROPEAN PATENT SPECIFICATION

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

(21)Application number: 16778374.5

(22)Date of filing:  07.10.2016
(51)Int. Cl.: 
E03F 5/02  (2006.01)
(86)International application number:
PCT/EP2016/074003
(87)International publication number:
WO 2017/060429 (13.04.2017 Gazette  2017/15)

(54)

INSPECTION CHAMBER FOR A PIPE STRUCTURE FOR DRAINAGE OR SEWERAGE

INSPEKTIONSKAMMER FÜR EINER ROHRSTRUKTUR FÜR ABFLUSS- ODER ABWASSERSYSTEME

CHAMBRE D'INSPECTION POUR UNE STRUCTURE DE TUYAU POUR DRAINAGE OU RÉSEAU D'ÉGOUTS


(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: 07.10.2015 NL 1041505

(43)Date of publication of application:
15.08.2018 Bulletin 2018/33

(73)Proprietor: Wavin B.V.
8011 CW Zwolle (NL)

(72)Inventor:
  • BOXUM, Silas Rudolf
    8052 CD Hattem (NL)

(74)Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)


(56)References cited: : 
WO-A1-2015/011294
  
      
    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

    Introduction



    [0001] The invention relates to an inspection chamber for a pipe structure for drainage or sewerage, also referred to as sewage. Such inspection chambers, if big enough, may also be referred to as manholes, or other access junctions which facilitate inspecting drainage or sewerage systems, by equipment, by a worker, or by both.

    [0002] Drainage and sewerage systems generally include underground pipes which, through use, are prone to becoming blocked or damaged. As pipes may run for a considerable distance underground, it is desirable to provide access to the pipes at various positions, and particularly where a pipe is joined to one or more other pipes. Such access is provided by what is referred to as an "inspection chamber". In this disclosure, the term inspection chamber may cover manholes, access junctions and similar products which provide access to sewerage or drainage systems. As the drainage and sewerage systems are generally placed underground, the inspection chamber is normally positioned such that an entrance of the chamber for inspecting, i.e. for letting equipment and/or a worker into the chamber, is positioned at an upper position.

    [0003] During installation of the inspection chamber in an underground infrastructure such as a pipe structure, there may be a timeframe during which the inspection chamber is positioned in a hole made in the ground, waiting for being connected up with pipes to form part of the infrastructure. It is also possible that the inspection chamber is placed on the ground in an area that is meant to be filled up by soil material. In the timeframe before becoming part of the infrastructure, the inspection chamber will at some stage, as a stand-alone, maintain an upright position, so that the inspection entrance is at an upper position. For ensuring that the inspection chamber can freely stand in that upright position it may be provided with a foot, for instance as described in DE 203 13 762 U1. The foot is according to that prior art document preferably at a position that coincides with a centre of gravity of the inspection chamber, preferably comprises a base plate and is preferably such that the weight of the inspection chamber can via the foot be supported by the ground in the hole. The foot will at some stage be surrounded by and/or embedded in soil-material that is used for filling the hole, therewith anchoring the inspection chamber.

    [0004] Going back to a period in the existence of the inspection chamber before placement of the inspection chamber on the ground in a hole or in an area that will be filled up with soil material, the inspection chamber experiences after its production a period of storage and of transport from a storage site (which may also be an inspection chamber production site) to its destination. Such transport is likely to be such that many parts of the pipe infrastructure are efficiently transported. This is especially important as, by their very nature, pipe infrastructure parts are hollow, so that transport often entails densely packing the parts so as to transport as many parts as possible per volume. However, such densely packing may have the undesired effect of deformation of parts.

    [0005] The costs of an inspection chamber are for a great deal set by the amount of material needed for making an inspection chamber. Hence inspection chamber designs are often the result of optimising strength and stiffness against a minimum of material needed for the design.

    [0006] WO 2015/011294 discloses an inspection chamber for a pipe structure for drainage or sewerage according to the preamble of claim 1, and in particular describes a stacking aid for inspection chambers for use in drainage or sewage systems to allow stable stacking of the inspection chambers. The stacking aid comprises at least one support configured to extend from an exterior surface of a first inspection chamber into an interior of a second chamber and/or adjacent to an exterior surface of a wall defining the interior, or the entrance opening, of the second inspection chamber, to thereby reduce movement of the first and second inspection chambers relative to each other in a direction perpendicular to the direction of stacking. Also an assembly of an inspection chamber stacking aid and an inspection chamber is described.

    [0007] There is a need for an inspection chamber that can stably be positioned with the inspection entrance at an upper position, that allows for densely packing the inspection chambers and that will also in terms of its positioning in vertical direction be stable, whilst keeping costs of producing the inspection chamber relatively low.

    Summary of the invention



    [0008] According to one aspect there is provided an inspection chamber for a pipe structure, for drainage or sewage, in accordance with claim 1.

    [0009] Having configured the feet-structure such that it can carry out these three independent functions, the overall performance of the inspection chamber is improved and only a minimum, if any at all of additional material is used for making such an improved inspection chamber.

    [0010] According to another presently non-claimed aspect, there is provided an inspection chamber for a pipe structure for drainage or sewage. The chamber has an inspection entrance at a first side for connecting up an inspection shaft. The chamber is further provided with a feet structure at a second side. The first side and the second side are opposite sides of the inspection chamber. The inspection chamber comprises between the feet structure and the inspection entrance a pipe part, and between the pipe part and the opening a compartment that is formed by wall portions which extend from the pipe part to the entrance opening. The chamber is further provided with stiffening portions which form a direct connection between the feet structure and the wall portions.

    [0011] Such a direct connection ensures that forces exerted on the feet structure and/or on the wall portions, are not all passed on to the pipe part. If forces were to be passed onto the pipe part, then these would possibly affect a deformation of the pipe part to an extent that the flow pattern of a fluid running through the pipe part is disturbed up to an undesired extent. Ideally, the stiffening portions bypass the pipe part. It may still be possible that the stiffening portions are connected to an outer wall of the pipe part, to facilitate easy manufacturing of the inspection chamber. However, when the stiffening portions are considered to bypass the pipe part, forces exerted on the feet structure and/or the wall portions, forming a compartment in the inspection chamber that is different to the pipe part, are only passed on to the pipe part, if at all, up to an extent that these forces do not lead to a noticeable effect in the flow pattern of a liquid running through the pipe part.

    [0012] According to a further presently non-claimed aspect there is provided a stack of at least two inspection chambers for a pipe structure for drainage or sewage. Each chamber has in a first side of the respective inspection chamber an inspection entrance for connecting up an inspection shaft. Each inspection chamber is at a second side of the respective inspection chamber provided with a feet-structure. The first side and the second side are opposite sides. Each inspection chamber comprises between the feet-structure and the entrance opening a pipe part, and between the pipe part and the entrance opening a compartment that is formed by wall portions which extend from the pipe part to the entrance opening. The inspection chamber is further provided with stiffening portions which form a direct connection between the feet structure and the wall portions. The feet structure of one of the at least two inspection chambers is in a mating position with the inspection entrance of another one of the at least two inspection chambers. The feet-structure comprising at least two fee which in combination are configured for maintaining the manufacturing shape of the inspection entrance of that another one of the at least two inspection chambers. Preferably, the stiffening portions by-pass the pipe part.

    [0013] According to another presently non-claimed aspect, there is provided a stack of at least two inspection chambers for a pipe structure for drainage or sewage. Each chamber has at a first side of the respective inspection chamber an inspection entrance for connecting up an inspection shaft. Each inspection chamber is at the second side of the respective inspection chamber provided with a feet-structure. The first side and the second side are opposite sides. The feet-structure of one of the at least two inspection chambers is in a mating position with the inspection entrance of another one of the at least two inspection chambers. The feet-structure of each inspection chamber comprise at least two feet which in combination are configured for stabilizing the respective inspection chamber when supporting on a supporting ground in such a way that the inspection entrance is at an upper position, therewith hindering sideways falling of the inspection chamber. Each foot is configured for resisting sinking of the respective inspection chamber into a sandy ground when positioned on such a sandy ground in such a way that the inspection entrance is at an upper position.

    [0014] Further embodiments and/or optimizations are discussed below in the description of the figures, without limiting the invention to the examples shown.

    [0015] Embodiments are further disclosed and explained on the basis of the drawings, which show in:

    Fig. 1 shows an isometric view of an embodiment of an inspection chamber according to the invention, in an upside down position;

    Fig. 2 shows an isometric view of an embodiment of an inspection chamber according to the invention, in a position in which the inspection entrance is at an upper position;

    Fig. 3 shows an isometric view of a part of an embodiment of an inspection chamber according to the invention, in an upside down position;

    Fig. 4 shows in an isometric view two embodiments of an inspection chamber according to the invention, in a mating position, as well as an embodiment of a stack of two inspection chambers;

    Fig. 5 shows a side view of an embodiment of an inspection chamber according to the invention;

    Fig. 6 shows a bottom view of an embodiment of an inspection chamber according to the invention; and

    Fig. 7 shows another side view of an embodiment of an inspection chamber according to the invention.



    [0016] In the drawing, like parts have like references.

    [0017] Fig. 1 shows an isometric view of an embodiment of an inspection chamber 1, in an "upside down" position. Fig 2 shows an isometric view of that embodiment, in a position which the inspection chamber 1 would have if placed in a pipe structure for drainage or sewage. The inspection chamber 1 has an inspection entrance 2 at a first side 3 for connecting up with an inspection shaft (not shown). The chamber 1 is further provided with a feet-structure 4 at a second side 5. The first side 3 and the second side 5 are opposite sides of the inspection chamber 1. As Figure 2 shows the position of the inspection chamber as it would have, i.e. in use; a position it would have underground, and inspection is likely to take place, it is clear that the inspection entrance should, as shown, be at an upper position. Consequently, the inspection chamber as shown in Figure 1 is "upside down".

    [0018] The feet-structure 4 comprises at least two feet 4a, 4b, which are in combination configured for:
    • stabilizing the inspection chamber 1 when positioned on a supporting ground in such a way that the inspection entrance is at an upper position.


    [0019] This way of positioning the inspection chamber 1 corresponds to the position shown in Fig. 2, in which the inspection chamber is shown as having its feet-structure downwards. Clearly, this way of configuring the at least two feet 4a, 4b hinders sideways falling of the inspection chamber 1.

    [0020] The two feet 4a, 4b are in combination also configured for maintaining the manufactured shape of the inspection entrance 2 of another one of such an inspection chamber 1, when the feet-structure 4 is placed in a mating position with the inspection entrance 2 of that other one of such an inspection chamber, for instance during storage and/or transport thereof.

    [0021] Fig. 3 shows in more detail a part of an embodiment of an inspection chamber, in an upside down position, to reveal more details of the feet structure 4 and other features related to the functioning of the feet structure when two of such inspection chambers 1 are in a mating position.

    [0022] For the sake of providing further understanding of the invention, Fig. 4 shows two inspection chambers 1 in a mating position. Below more details and explanations will be given as to the functioning of the feet-structure 4 and other parts of the inspection chamber 1.

    [0023] Each foot 4a, 4b itself is configured for resisting sinking of the inspection chamber 1 into a sandy ground when positioned on such a sandy ground in such a way that the inspection entrance 2 is at an upper position (shown in Fig. 2). Hereinafter, a position of the inspection chamber in such a way that the inspection entrance 2 is at an upper position, is also referred to as an "upright position".

    [0024] Each foot 4a, 4b is, as much as it is configured for resisting sinking, equally configured for acting as an anchor when the inspection chamber and thus also the feet-structure is buried in the ground. This is particularly important when a relatively high level of groundwater causes the inspection chamber to be driven upwardly. Then the "anchor-function" of the feet 4a, 4b may start playing a role and provide a brake against the tendency to be driven upwardly.

    [0025] Although not much reference will be made to Figs. 5, 6 and 7, showing respectively a side view, a bottom view and another side view of an embodiment of an inspection chamber 1, the skilled reader will be able to more completely visualize how an embodiment of an inspection chamber 1 could look like.

    [0026] Inspection entrance 2 for connecting up an inspection shaft (not shown) lies in an imaginary plane, and each of the feet 4a, 4b comprises a base plate 6 extending in a direction that is parallel to that imaginary plane. Each of the feet 4a, 4b comprises a base plate 6 extending in a direction that is across an axial direction of the entrance opening 2.

    [0027] At least one of the base plates 6 extends over an area that corresponds to 5-40% of an area defined by the inspection entrance 2. A more optimal compromise in terms of stability, resistance to sinking in a sandy ground, capability of maintaining the manufactured shape of the inspection entrance of another one of such an inspection chamber when mating therewith, and the amount of material needed for providing the feet structure, is available when at least one of the base plates 6 extends over an area that corresponds to 8-18% of an area defined by the inspection entrance 2. Preferably each of the base plates extends over an area that corresponds to 8-18% of an area defined by the inspection entrance 2.

    [0028] Each of the base plates 6 has an edge 7 that would cover a part of an inner periphery of the inspection entrance 2 of that other one of such an inspection chamber, when in mating position. The part of the periphery of the inspection entrance 2 that would be covered by an edge of the respective base plate 6 when a mating position applies, corresponds to at least 10-45% of the entire inner periphery of the inspection entrance 2. It has turned out that optimally, in terms of maintaining a manufactured shape of the inspection entrance 2 of another one when in mating position, and using a relatively low amount of material for the feet structure, the part of the periphery of the inspection entrance 2 that would be covered by an edge of the respective base plate 6 when a mating position applies, corresponds to 20-30% of the entire inner periphery of the inspection entrance 2.

    [0029] Turning now to Fig. 3, it is pointed out that the feet 4a, 4b are each provided with at least one position holder 8 configured for resisting lateral movement in at least one direction from a position of the inspection chamber 1 in a sandy ground when the inspection chamber is positioned in "upright position". The position holder 8 is preferably configured to resist lateral movement in any direction. The term "position holder" thus refers to holding a position relative to the ground, i.e. in the plane of the ground, when the inspection chamber is placed in the upright position. The embodiment shown in Fig. 3 has a part 8a extending in one direction and a part 8b extending in a direction perpendicular to the direction of part 8a. The position holder 8 comprises a blade-shaped part that extends in at least a direction which is parallel to an axial direction of the inspection entrance 2. The width of the blade is about 2-15 mm. The blade-shaped form is shown for part 8a as well as part 8b.

    [0030] Focusing now in more detail onto the features that assist in the functioning of the feet-structure when the inspection chamber 1 is in a mating position, it is pointed out that the inspection entrance 2 comprises a rim 9. Inspection chamber 1 is further provided with a multitude of positions 10 for abutting the rim 9 of that another one of such an inspection chamber 1 when the feet-structure is placed in the mating position. As can more easily be seen in Figure 4 showing a stack of two inspection chambers each in upside-down position and together in mating position, the positions 10 for abutting the rim 9 support the positioning of the upper inspection chamber. In the mating position, at least a part of the feet-structure is within the inspection entrance of that another one of such an inspection chamber. This can also be seen in Figure 4. The feet-structure that is underneath the inspection chamber 1 of the other inspection chamber, cannot be seen as it is within the inspection entrance 2 of the other inspection chamber 1. The positions 10 are distributed along an outer periphery of each base plate 6 so as to maximize the distance between those positions 10 along the rim 9 of that another one of such an inspection chamber 1 when the feet-structure is put in the mating position. This facilitates the function of maintaining the manufactured shape of the inspection entrance 2.

    [0031] So far, not much attention has been given to a further optimization of the inspection chamber. The inspection chamber comprises between the feet-structure 4 and the inspection entrance 2 a pipe part 11. The chamber 1 may also have at least two pipe connection parts 12 which are each for connecting up with a pipe part (not shown) that is not integrally a part of the inspection chamber. This allows for incorporating the inspection chamber in a pipe structure without having to cut a hole in an existing pipeline for inspection in the pipeline. The optimized inspection chamber is thus not an "add-on", but rather a compartment for inspection and a pipe integrally connected in a single piece entity. A compartment 13 is between the pipe part 11 and the entrance opening 2, and is formed by wall portions 14 which extend from the pipe part 11 to the entrance opening 2.

    [0032] Although other embodiments are conceivable, the embodiments shown in the Figures have at least two pipe connecting parts 13 sharing one axis. Preferably, as also shown, each of the at least two feet 4a, 4b extend in a direction which is across that axis. This provides for good stability when the inspection chamber is in the upright position.

    [0033] Another embodiment entails a so-called "end-chamber" which has only one pipe-connection part.

    [0034] The pipe part 11 of the inspection chamber 1 ideally functions such that it causes no undesired change in the flow profile of a flow through that pipe part 11, for instance relative to flow profiles in pipe parts which are not an integral part of an inspection chamber, i.e., pipe parts which are connected up with the pipe connection parts 12 of the inspection chamber 1. For that reason, pipe part 11 of the inspection chamber is on its outside provided with ribs 14, known in the art, for adding stiffness to the pipe-part 11. This is helpful for situations wherein groundwater pressure is high, and there is due to that a tendency to deform the pipe-part 11.

    [0035] The inspection chamber is further preferably provided with stiffening portions 16 which form a direct connection between the feet-structure 4 and the wall portions 14. The stiffening portions 16 are preferably such that forces at least partly bypass the pipe part 11. Each of the stiffening portions 16 is supporting at least one of the multitude of positions 10 for abutting the rim 9 of the other inspection chamber when the feet-structure 4 is placed in the mating position of that inspection chamber. Accordingly, the pipe part 11 of the inspection chamber 1 is to an extent protected against deformation due to high forces exerted upon the feet-structure or exerted on the compartment 13 of the inspection chamber, or the walls thereof. Such high forces can to an extent be guided along the pipe part 11, in that sense bypassing pipe part 11. Thus, excessive deformation of pipe part 11 is avoided, to the benefit of maintenance of a flow pattern of a fluid running through the pipe part 11.

    [0036] Figure 4 shows an optimal way of positioning two inspection chambers in a mating position, in the sense that the stiffening portions 16 of the upper inspection chamber are positioned directly in line with the stiffening portions 16 of the lower inspection chamber, further ensuring that forces resulting from loading are as much as possible unaffecting the pipe part 11, so that also in a stacked position during transport or storage of inspection chambers, any deformation of the pipe part 11 is unlikely to occur.

    [0037] It is further to be noted that in the position as shown of Figure 4, any high forces which potentially could lead to ovality of the opening entrance in a direction across the axis of the pipe part 11, will be suppressed by the feet-structure 4 of the lower inspection chamber, as the feet-structure will counteract a tendency of parts of the inspection entrance that will experience any forces radially inwardly, for instance due to radially outwardly directed forces exerted on rim 9 by stiffening portions 16. Preferably, as illustrated, a stiffening rib 17 is present between feet 4a, 4b of feet-structure 4, so as to assist in such counteracting forces which are directed radially inward.

    [0038] Although it should be clear from Figure 4 that stacking as shown is optimal, it is of course not inconceivable that the upper and lower inspection chambers are rotated relative to each other around an axis that coincides with the axis of the entrance opening.

    [0039] The invention is only limited by the scope of the appended claims, but not by by the Figures shown in the drawings and as described in the description above. Although the feet-structure is shown to consist of two feet which are spatially separated from each other, it is equally possible that three or four feet are used, and/or that any of the feet are connected, for instance for providing more positions 10 against which the rim 9 of the other inspection chamber can abut in the mating position.


    Claims

    1. Inspection chamber (1) for a pipe structure for drainage or sewerage, the chamber having an inspection entrance (2) at a first side (3) for connecting up with an inspection shaft, the chamber (1) further being provided with a feet-structure at a second side (5), the first side (3) and the second side (5) being opposite sides of the inspection chamber (1), the feet-structure (4) comprising at least two feet (4a, 4b)which are in combination configured for:

    • stabilizing the inspection chamber when positioned on a supporting ground in such a way that the inspection entrance (2) is at an upper position, therewith hindering sideways falling of the inspection chamber; and

    • maintaining the manufactured shape of the inspection entrance (2) of another one of such an inspection chamber when the feet-structure (4) is placed in a mating position with the inspection entrance (2) of that other one of such an inspection chamber (1), for instance during storage and/or transport thereof;

    and of which each foot (4a, 4b) itself is configured for:
    resisting sinking of the inspection chamber (1) into a sandy ground when positioned on such a sandy ground in such a way that the inspection entrance (2) is at an upper position, wherein the inspection entrance (2) for connecting up with an inspection shaft lies in an imaginary plane, characterized in that each of the feet (4a, 4b) comprises a base plate (6) extending in a direction that is parallel to that imaginary plane, and wherein at least one of the base plates (6) extends over an area that corresponds to 5 to 40% of an area defined by the inspection entrance (2) and/or at least one of the base plates (6) has an edge (7) that would cover a part of an inner periphery of the inspection entrance of that other one of such an inspection chamber (1), when in mating position.
     
    2. Inspection chamber (1) according to claim 1, wherein each of the feet (4a, 4b) comprises a base plate (6) extending in a direction that is across an axial direction of the entrance opening.
     
    3. Inspection chamber (1) according to claim 1 or 2, wherein each of the base plates (6) extends over an area that corresponds to 5 to 40% of an area defined by the inspection entrance (2).
     
    4. Inspection chamber (1) according to claim 1, 2 or 3, wherein the part of the periphery of the inspection entrance (2) that would be covered by an edge (5) of the respective base plate (6) when a mating position applies, corresponds to 10 to 45% of the entire inner periphery of the inspection entrance (2).
     
    5. Inspection chamber (1) according to any one of the previous claims, wherein at least one of the feet (4a, 4b) is provided with at least one position-holder (8) configured for resisting lateral movement in at least one direction from a position of the inspection chamber (1) in a sandy ground when the inspection chamber is positioned in such a way that the inspection entrance is at an upper position.
     
    6. Inspection chamber (1) according to claim 5, wherein the at least one position-holder (8) is configured to resist lateral movement in any direction.
     
    7. Inspection chamber (1) according to claim 5 or 6, wherein the at least one position-holder (8) comprises a blade-shaped part that extends in at least a direction that is parallel to an axial direction of the inspection entrance (2) .
     
    8. Inspection chamber (1) according to any one of the previous claims, wherein the inspection entrance comprises a rim (9) and wherein the inspection chamber is provided with a multitude of positions (10) for abutting the rim (9) of that another one of such an inspection chamber (1) when the feet-structure (4) is placed in the mating position.
     
    9. Inspection chamber (1) according to claim 8, wherein the positions of the multitude of positions (10) are distributed along an outer periphery of each base plate (6), so as to maximize a distance between those positions along the rim (9) of that another one of such an inspection chamber (1) when the feet structure (4) is put in a mating position.
     
    10. Inspection chamber (1) according to any one of the previous claims, wherein in the mating position at least a part of the feet structure (4) is within the inspection entrance (2) of that another one of such an inspection chamber (1).
     
    11. Inspection chamber (1) according to any one of the previous claims, wherein the chamber (1) has at least one pipe connecting part (12) which are each for connecting up with a pipe part.
     
    12. Inspection chamber (1) according to claim 11, wherein two of the at least two pipe connecting parts (13) share one axis.
     
    13. Inspection chamber (1) according to any one of the previous claims as far as depending from claim 12, wherein each of at least two feet (4a, 4b) extends in a direction which is across that axis.
     
    14. Inspection chamber (1) according to any one of the previous claims, wherein the feet-structure (4) consists of two feet (4a, 4b) which are spatially separated from each other.
     
    15. Inspection chamber (1) according to any one of the preceding claims, wherein the at least two feet (4a, 4b) are equally distributed with respect to a periphery of the inspection entrance (2).
     
    16. Inspection chamber (1) according to any one of the previous claims, wherein each of the inspection chamber comprises between the feet-structure (4) and the inspection entrance (2) a pipe-part (11), and between pipe-part (11) and the opening a compartment that is formed by wall portions (14) which extend from the pipe-part (11) to the entrance opening (2).
     
    17. Inspection chamber (1) according to claim 16, provided with stiffening portions (16) which form a direct connection between the feet-structure (4) and the wall portions (14).
     
    18. Inspection chamber (1) according to claim 17, wherein the stiffening portions (16) by-pass the pipe-part (11).
     
    19. Inspection chamber according to claim 18, as far as also dependent on claim 8, wherein the stiffening portions (16) are supporting at least one of the multitude of positions (10) for abutting the rim (9) of that another one of such an inspection chamber when the feet-structure (4) is placed in the mating position.
     


    Ansprüche

    1. Inspektionskammer (1) für eine Rohrstruktur für Abfluss- oder Abwassersysteme, wobei die Kammer einen Inspektionseingang (2) an einer ersten Seite (3) für eine Verbindung mit einem Inspektionsschacht aufweist, wobei die Kammer (1) weiter mit einer Fußstruktur an einer zweiten Seite (5) versehen ist, wobei die erste Seite (3) und die zweite Seite (5) gegenüberliegende Seiten der Inspektionskammer (1) sind, wobei die Fußstruktur (4) mindestens zwei Füße (4a, 4b) umfasst, die in Kombination konfiguriert sind zum:

    • Stabilisieren der Inspektionskammer, wenn auf einem stützenden Boden derart positioniert, dass der Inspektionseingang (2) an einer oberen Position ist, wodurch ein seitliches Fallen der Inspektionskammer verhindert wird; und

    • Aufrechterhalten der hergestellten Form des Inspektionseingangs (2) einer anderen solchen Inspektionskammer, wenn die Fußstruktur (4) in einer übereinstimmenden Position mit dem Inspektionseingang (2) der anderen derartigen Inspektionskammer (1) platziert wird, beispielsweise während deren Lagerung und/oder Transport;

    und von welcher jeder Fuß (4a, 4b) selbst konfiguriert ist zum:
    Widerstehen einem Absinken der Inspektionskammer (1) in einen sandigen Boden, wenn auf einem solchen sandigen Boden derart positioniert, dass der Inspektionseingang (2) an einer oberen Position ist, wobei der Inspektionseingang (2) zum Verbinden mit einem Inspektionsschacht in einer imaginären Ebene liegt, dadurch gekennzeichnet, dass jeder der Füße (4a, 4b) eine Basisplatte (6) umfasst, die sich in einer Richtung erstreckt, die parallel zu dieser imaginären Ebene ist, und wobei mindestens eine der Basisplatten (6) sich über eine Fläche erstreckt, die 5 bis 40% einer Fläche entspricht, die durch den Inspektionseingang (2) definiert ist, und/oder mindestens eine der Basisplatten (6) eine Kante (7) aufweist, die einen Teil eines Innenumfangs des Inspektionseingangs der anderen derartigen Inspektionskammer (1) bedecken würde, wenn in übereinstimmender Position.
     
    2. Inspektionskammer (1) nach Anspruch 1, wobei jeder der Füße (4a, 4b) eine Basisplatte (6) umfasst, die sich in einer Richtung erstreckt, die quer zu einer axialen Richtung der Eingangsöffnung verläuft.
     
    3. Inspektionskammer (1) nach Anspruch 1 oder 2, wobei sich jede der Basisplatten (6) über eine Fläche erstreckt, die 5 bis 40% einer Fläche entspricht, die durch den Inspektionseingang (2) definiert ist.
     
    4. Inspektionskammer (1) nach Anspruch 1, 2 oder 3, wobei der Teil des Umfangs des Inspektionseingangs (2), der durch eine Kante (5) der entsprechenden Basisplatte (6) bedeckt wäre, wenn eine übereinstimmende Position vorläge, 10 bis 45% des gesamten Innenumfangs des Inspektionseingangs (2) entspricht.
     
    5. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei mindestens einer der Füße (4a, 4b) mit mindestens einer Positionshalterung (8) versehen ist, die konfiguriert ist, einer seitlichen Bewegung in mindestens einer Richtung von einer Position der Inspektionskammer (1) in einem sandigen Boden zu widerstehen, wenn die Inspektionskammer derart positioniert ist, dass der Inspektionseingang an einer oberen Position ist.
     
    6. Inspektionskammer (1) nach Anspruch 5, wobei die mindestens eine Positionshalterung (8) konfiguriert ist, einer seitlichen Bewegung in jeder Richtung zu widerstehen.
     
    7. Inspektionskammer (1) nach Anspruch 5 oder 6, wobei die mindestens eine Positionshalterung (8) einen klingenförmigen Teil umfasst, der sich in mindestens einer Richtung erstreckt, die parallel zu einer axialen Richtung des Inspektionseingangs (2) ist.
     
    8. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei der Inspektionseingang einen Rand (9) umfasst und wobei die Inspektionskammer mit einer Vielzahl von Positionen (10) zum Anlegen des Rands (9) dieser anderen derartigen Inspektionskammer (1) versehen ist, wenn die Fußstruktur (4) in der übereinstimmenden Position platziert ist.
     
    9. Inspektionskammer (1) nach Anspruch 8, wobei die Positionen der Vielzahl von Positionen (10) entlang eines Außenumfangs jeder Basisplatte (6) verteilt sind, sodass ein Abstand zwischen jenen Positionen entlang des Rands (9) dieser anderen derartigen Inspektionskammer (1) maximiert ist, wenn die Fußstruktur (4) in eine übereinstimmende Position gebracht wird.
     
    10. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei in der übereinstimmenden Position mindestens ein Teil der Fußstruktur (4) innerhalb des Inspektionseingangs (2) dieser anderen derartigen Inspektionskammer (1) liegt.
     
    11. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei die Kammer (1) mindestens eines Rohrverbindungsteil (12) aufweist, die zur Verbindung mit einem Rohrteil dienen.
     
    12. Inspektionskammer (1) nach Anspruch 11, wobei zwei der mindestens zwei Rohrverbindungsteile (13) sich eine Achse teilen.
     
    13. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, soweit von Anspruch 12 abhängig, wobei jeder von mindestens zwei Füßen (4a, 4b) sich in einer Richtung erstreckt, die quer zu dieser Achse verläuft.
     
    14. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei die Fußstruktur (4) aus zwei Füßen (4a, 4b) besteht, die räumlich voneinander getrennt sind.
     
    15. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei die mindestens zwei Füße (4a, 4b) in Bezug auf einen Umfang des Inspektionseingangs (2) gleich verteilt sind.
     
    16. Inspektionskammer (1) nach einem der vorstehenden Ansprüche, wobei jede der Inspektionskammer zwischen der Fußstruktur (4) und dem Inspektionseingang (2) ein Rohrteil (11) und zwischen Rohrteil (11) und der Öffnung ein Fach umfasst, das durch Wandabschnitte (14) gebildet ist, die sich von dem Rohrteil (11) zur Eingangsöffnung (2) erstrecken.
     
    17. Inspektionskammer (1) nach Anspruch 16, die mit Versteifungsabschnitten (16) versehen ist, die eine direkte Verbindung zwischen der Fußstruktur (4) und den Wandabschnitten (14) bilden.
     
    18. Inspektionskammer (1) nach Anspruch 17, wobei die Versteifungsabschnitte (16) das Rohrteil (11) umgehen.
     
    19. Inspektionskammer nach Anspruch 18, soweit von Anspruch 8 abhängig, wobei die Versteifungsabschnitte (16) mindestens eine der Vielzahl von Positionen (10) stützen, um an dem Rand (9) der anderen derartigen Inspektionskammer anzuliegen, wenn die Fußstruktur (4) in der übereinstimmenden Position platziert ist.
     


    Revendications

    1. Chambre d'inspection (1) pour une structure de tuyau pour drainage ou réseau d'égouts, la chambre ayant une entrée d'inspection (2) au niveau d'un premier côté (3) pour le raccordement à un arbre d'inspection, la chambre (1) étant dotée en outre d'une structure de pieds au niveau d'un second côté (5), le premier côté (3) et le second côté (5) étant des côtés opposés de la chambre d'inspection (1), la structure de pieds (4) comprenant au moins deux pieds (4a, 4b) qui sont configurés en combinaison pour :

    - stabiliser la chambre d'inspection lorsqu'elle est positionnée sur un sol de support de telle manière que l'entrée d'inspection (2) est à une position supérieure, empêchant ce faisant une chute latérale de la chambre d'inspection ; et

    - maintenir la forme fabriquée de l'entrée d'inspection (2) d'une autre d'une telle chambre d'inspection lorsque la structure de pieds (4) est placée dans une position d'accouplement avec l'entrée d'inspection (2) de cette autre d'une telle chambre d'inspection (1), par exemple pendant son stockage et/ou transport ;

    et dont chaque pied (4a, 4b) lui-même est configuré pour :
    résister à un enfoncement de la chambre d'inspection (1) dans un sol sableux lorsqu'elle est positionnée sur un tel sol sableux de telle manière que l'entrée d'inspection (2) est à une position supérieure, dans laquelle l'entrée d'inspection (2) pour le raccordement à un arbre d'inspection se trouve dans un plan imaginaire, caractérisée en ce que chacun des pieds (4a, 4b) comprend une plaque de base (6) s'étendant dans une direction qui est parallèle à ce plan imaginaire, et dans laquelle au moins une des plaques de base (6) s'étend sur une aire qui correspond à 5 à 40 % d'une aire définie par l'entrée d'inspection (2) et/ou au moins une des plaques de base (6) a un bord (7) qui couvrirait une partie d'une périphérie intérieure de l'entrée d'inspection de cette autre d'une telle chambre d'inspection (1), lorsqu'elle est en position d'accouplement.
     
    2. Chambre d'inspection (1) selon la revendication 1, dans laquelle chacun des pieds (4a, 4b) comprend une plaque de base (6) s'étendant dans une direction qui est transversale à une direction axiale de l'ouverture d'entrée.
     
    3. Chambre d'inspection (1) selon la revendication 1 ou 2, dans laquelle chacune des plaques de base (6) s'étend sur une aire qui correspond à 5 à 40 % d'une aire définie par l'entrée d'inspection (2).
     
    4. Chambre d'inspection (1) selon la revendication 1, 2 ou 3, dans laquelle la partie de la périphérie de l'entrée d'inspection (2) qui serait couverte par un bord (5) de la plaque de base (6) respective lorsqu'une position d'accouplement s'applique correspond à 10 à 45 % de toute la périphérie intérieure de l'entrée d'inspection (2).
     
    5. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle au moins un des pieds (4a, 4b) est doté d'au moins un support de position (8) configuré pour résister à un mouvement latéral dans au moins une direction d'une position de la chambre d'inspection (1) dans un sol sableux lorsque la chambre d'inspection est positionnée de telle manière que l'entrée d'inspection est à une position supérieure.
     
    6. Chambre d'inspection (1) selon la revendication 5, dans laquelle l'au moins un support de position (8) est configuré pour résister à un mouvement latéral dans n'importe quelle direction.
     
    7. Chambre d'inspection (1) selon la revendication 5 ou 6, dans laquelle l'au moins un support de position (8) comprend une partie en forme de lame qui s'étend dans au moins une direction qui est parallèle à une direction axiale de l'entrée d'inspection (2).
     
    8. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle l'entrée d'inspection comprend un rebord (9) et dans laquelle la chambre d'inspection est dotée d'une multitude de positions (10) pour venir en butée contre le rebord (9) de cette autre d'une telle chambre d'inspection (1) lorsque la structure de pieds (4) est placée dans la position d'accouplement.
     
    9. Chambre d'inspection (1) selon la revendication 8, dans laquelle les positions de la multitude de positions (10) sont distribuées le long d'une périphérie extérieure de chaque plaque de base (6), de façon à maximiser une distance entre ces positions le long du rebord (9) de cette autre d'une telle chambre d'inspection (1) lorsque la structure de pieds (4) est mise dans une position d'accouplement.
     
    10. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle dans la position d'accouplement, au moins une partie de la structure de pieds (4) est à l'intérieur de l'entrée d'inspection (2) de cette autre d'une telle chambre d'inspection (1).
     
    11. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle la chambre (1) a au moins une partie de raccordement de tuyau (12) qui sont chacune pour le raccordement à une partie de tuyau.
     
    12. Chambre d'inspection (1) selon la revendication 11, dans laquelle deux des au moins deux parties de raccordement de tuyau (13) partagent un axe.
     
    13. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes en fonction de la revendication 12, dans laquelle chacun d'au moins deux pieds (4a, 4b) s'étend dans une direction qui est transversale à cet axe.
     
    14. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle la structure de pieds (4) est constituée de deux pieds (4a, 4b) qui sont séparés spatialement l'un de l'autre.
     
    15. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle les au moins deux pieds (4a, 4b) sont distribués également par rapport à une périphérie de l'entrée d'inspection (2).
     
    16. Chambre d'inspection (1) selon l'une quelconque des revendications précédentes, dans laquelle chacune de la chambre d'inspection comprend, entre la structure de pieds (4) et l'entrée d'inspection (2), une partie de tuyau (11), et entre la partie de tuyau (11) et l'ouverture, un compartiment qui est formé par des portions de paroi (14) qui s'étendent de la partie de tuyau (11) à l'ouverture d'entrée (2).
     
    17. Chambre d'inspection (1) selon la revendication 16, dotée de portions de raidissement (16) qui forment un raccordement direct entre la structure de pieds (4) et les portions de paroi (14).
     
    18. Chambre d'inspection (1) selon la revendication 17, dans laquelle les portions de raidissement (16) contournent la partie de tuyau (11).
     
    19. Chambre d'inspection selon la revendication 18, en fonction également de la revendication 8, dans laquelle les portions de raidissement (16) supportent au moins une de la multitude de positions (10) pour venir en butée contre le rebord (9) de cette autre d'une telle chambre d'inspection lorsque la structure de pieds (4) est placée dans la position d'accouplement.
     




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    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