JP5779426B2 - Fluid pipe movement prevention device - Google Patents

Description

  The present invention relates to an apparatus for preventing movement of a fluid pipe that is externally fitted to a fluid pipe and prevents the fluid pipe from moving in the pipe axis direction.

  As a fluid pipe movement prevention device, Patent Document 1 describes a pusher wheel (ring for connection) as shown in FIG. This push ring 34 accommodates a retaining member 36 in a housing groove 39 of the housing 37, and FIG. 14 shows a set state in which the claw 38 of the retaining member 36 can be locked to the outer peripheral surface of the fluid pipe P. ing. FIG. 15 shows an initial state such as when transporting or starting an external fitting operation. After the push ring 34 is externally attached to the fluid pipe P, the retaining member 36 is pushed in with the push bolt 31 and the set shown in FIG. Transition to the state. The holding piece 32 holds the retaining member 36 so as not to drop out of the housing groove 39.

  FIG. 16 shows a load state when an external force in the arrow direction F acts on the fluid pipe P. When the fluid pipe P tries to move in the arrow direction F from the set state, the inclined surface formed on the outer periphery of the retaining member 36 presses against the tip of the push bolt 31 and presses the retaining member 36 toward the fluid pipe P. The nail | claw 38 bites firmly and the movement to work can prevent the movement to the pipe-axis direction of the fluid pipe P. The movement allowance M of the retaining member 36 at this time is determined based on the distance between the side surface of the retaining member 36 in the set state and the inner wall surface of the accommodating groove 39 facing it.

  Further, Patent Document 2 by the present applicant proposes a fluid pipe movement prevention device having an overlapping claw structure in which the claws of adjacent retaining members are arranged so as to overlap each other in the tube axis direction in the set state. Yes. According to this structure, the contact area of the claw with respect to the outer peripheral surface of the fluid pipe can be increased, and the movement preventing effect can be remarkably improved. In FIG. 17, two types of retaining members 46A and 46B having two claws 48A and 48B arranged at intervals in the tube axis direction are alternately arranged. The claw 48A of the retaining member 46A and the claw 48B of the retaining member 46B are arranged so as to overlap each other in the tube axis direction.

  By the way, in the manufacturing process of this apparatus, when the retaining member 46A and the retaining member 46B are pushed into the annular housing groove 49 of the housing 47 and mounted, different kinds of retaining members need to be adjacent to each other. In the manufacturing site, there are cases where the same type of retaining member is adjacently assembled. When such an assembly error occurs, the claw 48A or the claw 48B interferes with each other when the retaining member is brought close to the outer peripheral surface of the fluid pipe to shift to the set state, and the claw cannot be disposed at a predetermined position. Produce.

Japanese Utility Model Publication No. 4-39507 JP 2008-309186 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a fluid pipe movement prevention device capable of preventing an assembly error of a retaining member provided in an overlapping claw structure.

The above object can be achieved by the present invention as described below. That is, the fluid pipe movement prevention device according to the present invention is a fluid pipe movement prevention device that is externally fitted to a fluid pipe and prevents the fluid pipe from moving in the pipe axis direction. A plurality of retaining members having claws disposed at a plurality of locations in the direction and capable of biting into the outer peripheral surface of the fluid pipe, and a receiving groove opened toward the outer peripheral face of the fluid pipe, And an annular housing for accommodating the retaining member, and the plurality of retaining members have projecting portions projecting on both sides in the circumferential direction on one side of the inner peripheral surface in the tube axis direction. A first retaining member having the claw formed on the part and a projecting part projecting on both sides in the circumferential direction on the other side in the tube axis direction of the inner peripheral surface, and the claw is formed on the projecting part And a second retaining member, and a claw formed on the overhang portion of the first retaining member, and the first retaining member. The claws formed in the overhanging portion of the second retaining member adjacent to the member are arranged so as to overlap each other in the tube axis direction in a state in which the claws can be locked to the outer peripheral surface of the fluid tube, A partition wall interposed between the first retaining member housed in the housing groove and the second retaining member adjacent to the first retaining member is provided in the housing; The partition wall protrudes in the circumferential direction on the other side in the tube axis direction of the side wall facing the first retaining member, and the overhang portion of the first retaining member accommodated in the accommodating groove And a first protrusion that opposes in the tube axis direction, and one side in the tube axis direction of the side wall facing the second retaining member protrudes in the circumferential direction, and is accommodated in the accommodating groove. and a second projection facing the projecting portion of the second retaining member and the tube axis direction, the first protrusion is formed An inclined surface inclined toward the first retaining member side is formed on the side wall of the partition wall toward the outer side in the radial direction, and the outer side in the radial direction is formed on the side wall of the partition wall on which the second protrusion is formed. An inclined surface that is inclined toward the second retaining member side is formed .

  In the fluid pipe movement preventing device according to the present invention, in the manufacturing process, when the retaining member is pushed into the housing groove of the housing and mounted, the second retaining member is provided at a position where the first retaining member is to be accommodated. If it is going to accommodate, the overhang | projection part of the 2nd retaining member will interfere with the 1st protrusion part of a partition wall. Conversely, if the first retaining member is to be accommodated in a location where the second retaining member is to be accommodated, the overhanging portion of the first retaining member interferes with the second protrusion of the partition wall. To do. For this reason, the same type of retaining members cannot be adjacent to each other, and assembly errors can be prevented.

  This device has a so-called overlapping claw structure in which the claw of the retaining member is arranged so that the claw of the adjacent retaining member overlaps in the tube axis direction in a state where the claw of the retaining member can be locked to the outer peripheral surface of the fluid pipe. In the process of bringing the retaining member closer to the outer peripheral surface of the fluid pipe, the claws of the adjacent retaining members approach each other. Therefore, it is preferable that the top surface of the partition wall is set radially outside the inner peripheral surface of the housing, whereby the claw of the retaining member close to the outer peripheral surface of the fluid pipe interferes with the partition wall. In addition, it is possible to maintain the sufficient strength by securing the thickness of the partition wall.

  On the other hand, when aligning the top surface of the partition wall with the inner peripheral surface of the housing, the top of the partition wall has a thin tapered shape so that the claw of the retaining member does not interfere with the partition wall. There is a need, and sufficient strength may not be secured. Further, when the top surface of the partition wall is set radially outside the inner peripheral surface of the housing, the claw of the adjacent retaining member in a state where the retaining member is pushed into the housing groove. It is possible to easily realize a structure in which the members are arranged to overlap each other in the tube axis direction. Even in such a structure, the present invention is useful because work efficiency is improved by preventing assembly errors.

In the present invention, an inclined surface inclined toward the first retaining member side toward the radially outer side is formed on a side wall of the partition wall where the first protrusion is formed, and the second protrusion An inclined surface that is inclined toward the second retaining member side toward the radially outer side is formed on the side wall of the partition wall in which is formed . According to the above configuration, since the posture of the retaining member housed in the housing groove is prevented from being collapsed, the positioning accuracy of the claw in the state that can be locked to the outer peripheral surface of the fluid pipe is improved, and It can arrange | position correctly so that nail | claws may overlap in a pipe-axis direction.

  In the present invention, it is preferable that the partition wall is formed integrally with the housing. Thereby, a partition wall can be simply comprised in a housing. In addition, when the fluid pipe is about to move in the pipe axis direction, an external force in the direction of expanding the groove width of the receiving groove acts. However, by providing the partition wall integrally with the housing, the strength of the housing itself against the external force is increased. And the occurrence of cracks in the housing can be suppressed.

  In the present invention, the elastic member is attached to the first side surface of the retaining member facing the moving direction of the fluid pipe, and is attached to the second side surface of the retaining member facing the opposite side of the first side surface. In the process from the initial state to the set state in which the claw of the retaining member can be locked to the outer peripheral surface of the fluid pipe, the inner wall surface of the receiving groove facing the second side surface It is preferable that the holding member is in contact with the first side surface and the inner wall surface of the receiving groove facing the first side surface is held via the elastic member.

  In such a configuration, in the process from the initial state to the set state, the holding member is in contact with the inner wall surface of the housing groove facing the second side surface of the retaining member, and the first side surface of the retaining member and the housing facing it. Since the distance from the inner wall surface of the groove is held via the elastic member, the movement allowance of the retaining member is determined without being influenced by the pushing amount of the retaining member or the groove width of the receiving groove. As a result, variation in the movement allowance of the retaining member can be suppressed and the effect of preventing the movement of the fluid pipe can be stably exhibited.

Sectional drawing of the pipe joint equipped with the press ring which is an example of the movement prevention apparatus of the fluid pipe | tube which concerns on this invention Sectional view of the presser wheel viewed from the pipe axis direction Perspective view of press ring Development view showing inner surface of press ring (A) BB sectional view and (B) CC sectional view of FIG. 4 in the initial state (A) BB sectional view and (B) CC sectional view of FIG. 4 in the set state (A) BB sectional view and (B) CC sectional view of FIG. 4 in a loaded state The perspective view which shows the state before mounting | wearing a retaining ring with a retaining member. Perspective cross-sectional view of press ring A perspective sectional view showing a state before the retaining member is attached to the push ring (A) principal part sectional drawing and (B) expansion | deployment figure of the internal peripheral surface of the press ring in another embodiment of this invention The figure which shows the back side of a retaining member The figure which shows the front side surface of a retaining member (A) main part sectional view, (B) DD sectional view, and (C) EE sectional view in the set state of the press wheel described in Patent Document 1 DD sectional view in the initial state DD cross section under load The developed view which shows the internal peripheral surface of the housing in the initial state of the apparatus described in patent document 2

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an example in which the fluid pipe movement prevention device according to the present invention is applied to a press wheel is shown.

  FIG. 1 is a cross-sectional view of a pipe joint equipped with a push ring 4 as a fluid pipe movement prevention device. FIG. 2 is a cross-sectional view of the pusher wheel 4 as viewed from the tube axis direction, and the AA cross section corresponds to FIG. FIG. 3 is a perspective view of the pusher wheel 4. In this pipe joint, a mouthpiece 2 of a ductile cast iron water pipe P (an example of a fluid pipe) is inserted into and connected to a water inlet 1 of the water pipe, and a push ring externally fitted to the water pipe P is attached. 4 prevents the water pipe P from moving in the axial direction of the pipe, and thus prevents the insertion part 2 from being detached from the receiving part 1.

  The pusher wheel 4 is connected to the flange 1 a of the receiving portion 1 by a fastener including a plurality of T-head bolts 51 inserted through the insertion holes 50 and nuts 52 fastened to the T-head bolts 51. . The pusher wheel 4 is attracted to the flange 1a as the nut 52 is tightened, and compresses the sealing material 3 from the tube axis direction. A space between the inner peripheral surface of the receiving portion 1 and the outer peripheral surface 2 a of the insertion portion 2 is sealed with a sealing material 3. The push ring 4 includes retaining members 6 and annular housings 7 disposed at a plurality of locations (four locations in the present embodiment) in the circumferential direction of the water pipe P.

  The retaining member 6 has claws 8A and 8B that can bite into the outer peripheral surface 2a of the water pipe P. An inclined surface 63 whose outer diameter changes along the tube axis direction is formed on the outer peripheral surface of the retaining member 6 to which the tip of the push bolt 10 faces, and the front side on which the outer diameter of the inclined surface 63 increases. A front claw 8A is formed on the right side (FIG. 1), and a rear claw 8B is formed on the rear side (left side in FIG. 1) where the outer diameter of the inclined surface 63 is reduced. In this embodiment, the retaining member 6 has the two claws 8A and 8B, but the retaining member 6 may have one or three or more nails.

  The front claws 8A and the rear claws 8B are arranged at intervals in the tube axis direction, and the distal ends of the front claws 8A are curved in an arc shape along the outer circumferential surface 2a, and the inner circumferential surface of the retaining member 6 has a triangular cross section. Projected to The retaining member 6 is made of a robust material such as metal, and specifically cast iron is exemplified. In the present embodiment, as the retaining member 6, two types of retaining member 6A (first retaining member) and retaining member 6B (second retaining member) are employed as shown in FIGS. They are arranged alternately in the circumferential direction.

  The retaining member 6A has a projecting portion 60A projecting on both sides in the circumferential direction on the front side (one side in the tube axis direction) of the inner peripheral surface, and a front claw 8A is formed on the projecting portion 60A. Further, the retaining member 6B has a projecting portion 60B projecting on both sides in the circumferential direction on the rear side (the other side in the tube axis direction) of the inner peripheral surface, and a rear claw 8B is formed on the projecting portion 60B. Yes. The push ring 4 has an overlapping claw structure, and the front claw 8A of the retaining member 6A and the rear claw 8B of the retaining member 6B adjacent to the retaining member 6A are respectively on the outer peripheral surface of the water pipe P. In a lockable state, they are arranged so as to overlap each other in the tube axis direction.

  The housing 7 has an accommodation groove 9 that opens toward the outer peripheral surface 2 a of the water pipe P, and the retaining member 6 is accommodated in the accommodation groove 9. A push bolt 10 as a pressing member that presses the retaining member 6 toward the outer peripheral surface 2 a is attached to the housing groove 9, and the retaining member 6 can be pushed in by operating the pushing bolt 10. Yes. In the present embodiment, an example in which the housing 7 is integrally formed in an annular shape is shown, but instead of this, a divided structure may be used. In that case, the peripheral ends of a plurality of divided pieces are assembled to each other to form an annular shape. Formed.

  4 and 5 show an initial state in which the retaining member 6 is pushed into the housing groove 9 at the time of shipping and transporting or when an external fitting operation to the water pipe P is started, and the claws 8A and 8B are water pipes. The outer peripheral surface 2a of P is not locked. After the press ring 4 is externally fitted to the water pipe P, when the retaining member 6 is pushed by operating the push bolt 10, the front claws 8A and the rear claws 8B protrude from the housing groove 9 as shown in FIG. It will be in the set state which can be locked to. 1 and 2 also show the set state. The claws 8A and 8B in the set state may be any ones that are caught on the outer peripheral surface 2a, and may slightly bite into the outer peripheral surface 2a.

  When an external force in the arrow direction F (external force toward the rear side) acts on the set water pipe P, the retaining member 6 moves in the same direction as shown in FIG. The wedge effect is demonstrated by hitting. Thereby, the force which presses the retaining member 6 toward the outer peripheral surface 2a works, and the claws 8A and 8B firmly bite, and the retaining action by the retaining member 6 is enhanced to prevent the movement of the water pipe P. Can do. Note that even if an external force that moves the water pipe P forward is applied, no particular inconvenience arises because the tip of the insertion portion 2 abuts against the inner surface of the receiving portion 1.

  In the initial state shown in FIG. 4, the front claw 8 </ b> A of the retaining member 8 </ b> A and the rear claw 8 </ b> B of the retaining member 8 </ b> B are not disposed overlapping each other in the tube axis direction and are completely partitioned by the partition wall 20. When the retaining members 6A and 6B are pressed with the push bolt 10 to shift to the set state, the adjacent retaining members 6A and 6B approach each other, and the front claw 8A of the retaining member 8A and the rear claw of the retaining member 8B. 8B overlaps with the tube axis direction.

  According to this overlapping claw structure, the perimeter of the contact area of the claw with respect to the outer peripheral surface 2a can be increased, and the movement prevention effect of the water pipe P can be enhanced. Further, in such an overlapping claw structure, there is a possibility that the claw may interfere between the retaining members 6 adjacent in the circumferential direction according to the variation in the movement allowance of the retaining member 6. Since the movement allowance M of the retaining member 6 can be made uniform as described above, such a problem can be prevented.

  As shown in FIGS. 2 to 4 and 8 to 10, the housing 7 includes a partition interposed between the retaining member 6 </ b> A housed in the housing groove 9 and the retaining member 6 </ b> B adjacent to the retaining member 6 </ b> A. A wall 20 is provided. The partition wall 20 protrudes in the circumferential direction on the rear side (the other side in the tube axis direction) of the side wall facing the retaining member 6A, and the overhanging portion 60A of the retaining member 6A accommodated in the accommodating groove 9 The protruding portion 21 (first protruding portion) facing the tube axis direction and the front side (one side in the tube axis direction) of the side wall facing the retaining member 6B are protruded in the circumferential direction. It has the overhang | projection part 60B of the accommodated retaining member 6B, and the protrusion 22 (2nd protrusion) which opposes a pipe-axis direction.

  In the manufacturing process of the pusher wheel 4, when the retaining member 6 is pushed into the housing groove 9 and is mounted, if the retaining member 6B is to be accommodated in a location where the retaining member 6A is to be accommodated, the retaining member 6B is projected. The part 60 </ b> B interferes with the protrusion 21 of the partition wall 20. Conversely, if the retaining member 6A is to be accommodated in a location where the retaining member 6B is to be accommodated, the overhanging portion 60A of the retaining member 6A interferes with the protrusion 22 of the partition wall 20. For this reason, the same type of retaining members cannot be adjacent to each other, and assembly errors can be prevented.

  The top surface 20 a of the partition wall 20 is set on the radially outer side than the inner peripheral surface of the housing 7. Thus, the claws 8A and 8B of the retaining member 6 approaching the outer peripheral surface 2a can be prevented from interfering with the partition wall 20, and the thickness of the partition wall 20 can be secured and sufficient strength can be maintained. In addition, since the partition wall 20 is provided with the protrusions 21 and 22 on both sides in the circumferential direction, a reinforcing effect is also expected. The partition wall 20 is integrally formed with the housing 7 by casting, for example.

  Further, since the top surface 20a is set radially outward from the inner peripheral surface of the housing 7, as shown in FIG. 11, in the initial state, the claws of the adjacent retaining members 6A and 6B are connected to each other in the tube axis. It is possible to relatively easily realize a structure that is stacked in the direction. The partition wall 25 interposed between the retaining members 6A and 6B is formed with a protrusion 26 facing the overhang 60A and a protrusion 27 facing the overhang 60B on the base side. As described above, assembly errors can be prevented. Even in such an overlapping claw structure, the present invention is useful because work efficiency is improved by preventing assembly errors.

  As shown in FIGS. 8 and 10, an inclined surface 21 a that is inclined toward the retaining member 6 </ b> A toward the radially outer side is formed on the side wall of the partition wall 20 on which the protrusion 21 is formed, and the protrusion 22 is formed. An inclined surface 22a is formed on the side wall of the partition wall 20 which is inclined toward the retaining member 6B toward the radially outer side. The inclined surfaces 21a and 22a are brought into surface contact with the side surfaces of the retaining member 6 in the initial state, and the posture of the retaining member 6 housed in the housing groove 9 is prevented from being broken. Thereby, the positioning accuracy of the claws 8A and 8B can be improved, and the claws of the adjacent retaining members 6A and 6B can be accurately arranged so as to overlap in the tube axis direction.

  The push wheel 4 of this embodiment is attached to the elastic member 11 attached to the rear side surface 61 (corresponding to the first side surface) of the retaining member 6 and the front side surface 62 (corresponding to the second side surface) of the retaining member 6. In the process from the initial state to the set state, the holding member 12 is in contact with the inner wall surface 92 of the receiving groove 9 facing the front side surface 62 and is opposed to the rear side surface 61. The space between the housing groove 9 and the inner wall surface 91 is configured to be held via the elastic member 11.

  As shown in FIG. 12, the elastic member 11 is attached to the rear side surface 61 of the retaining member 6 facing the rear side, which is the moving direction of the water pipe P. In the present embodiment, the elastic member 11 is formed in a sheet shape, and is attached to three locations of the central portion and both end portions in the circumferential direction of the retaining member 6. The elastic member 11 is preferably made of an elastic material such as rubber and is harder than the holding member 12. For attachment to the rear side surface 61, sticking with an adhesive or an adhesive, baking of rubber, lining, or the like can be used.

  As shown in FIG. 13, the holding member 12 is attached to the front side surface 62 of the retaining member 6 facing the opposite side of the rear side surface 61. In this embodiment, the holding member 12 is formed in a sheet shape, and both end portions in the circumferential direction are thicker than the central portion, and a protrusion is provided at the lower portion of the thick portion (FIG. 7B). )reference). The holding member 12 is formed of, for example, rubber or urethane, and is not particularly limited, but is preferably formed of an elastic material. For attachment to the front side surface 62, the above-described sticking, baking, lining, or the like can be used.

  In the initial state shown in FIG. 5, the holding member 12 includes the retaining member 6 in which the elastic member 11 is in contact with the inner wall surface 91 of the housing groove 9 and the housing groove 9 facing the front side surface 62 of the retaining member 6. The retaining member 6 is urged toward the inner wall surface 91 so as not to drop out of the housing groove 9. That is, the retaining member 6 is temporarily secured in a state of being sandwiched between the inner wall surfaces 91 and 92 of the housing groove 9 via the elastic member 11 and the holding member 12.

  In the initial state, the elastic member 11 contacts the inner wall surface 91 facing the rear side surface 61 leaving a compression allowance, and the holding member 12 contacts the inner wall surface 92 facing the front side surface 62. A space D is provided between the inner wall surface 91 and the inner wall surface 91. The retaining member 6 is urged toward the inner wall surface 91 by the holding member 12, thereby providing a distance D with a size corresponding to the thickness of the elastic member 11 contacting the inner wall surface 91. 6, the elastic member 11 is in contact with the inner wall surface 91 while the holding member 12 is in contact with the inner wall surface 92, and a distance D corresponding to the thickness of the elastic member 11 is also provided. It is done.

  In the load state shown in FIG. 7, the retaining member 6 moves in the arrow direction F together with the water pipe P. The movement allowance M of the retaining member 6 at this time is determined based on the interval D in the set state, and more precisely, the distance obtained by subtracting the thickness of the elastic member 11 in the loaded state from the interval D corresponds to the move allowance M. To do.

  In the pusher wheel 4, while the push bolt 10 pushes the retaining member 6 in an oblique direction in the process from the initial state to the set state, the holding member 12 is in contact with the inner wall surface 92 of the housing groove 9 and the elastic member 11. Since the distance D is held constant via the clearance, the movement margin M of the retaining member 6 is determined without being influenced by the pushing amount of the retaining member 6 or the groove width of the receiving groove 9.

  As a result, variation in the movement allowance of the retaining member 6 can be suppressed, and the movement prevention effect of the water pipe P can be stably exhibited. That is, even when the pushing amounts of the retaining members 6 are different from each other, or even when the housing 7 is cast (for example, made of cast iron) and has a large dimensional tolerance, the variation in the movement allowance M is suppressed, and the water pipe The effect of preventing the movement of P can be stably exhibited, and in particular, it can contribute to the improvement of ultimate performance when a strong external force acts on the water pipe P.

  On the other hand, in the above-described conventional structure, the distance D (FIG. 15) between the retaining member 36 and the accommodation groove 39 in the initial state is smaller than the movement allowance M (FIG. 14), and the distance D in the initial state is the retaining member. It expands with the pressing of 36, and becomes a movement allowance M in the set state. For this reason, there is a problem that the movement allowance M varies depending on the pushing amount of the retaining member 36. Further, even if the pushing amount is constant, the movement allowance M can be changed according to the groove width of the receiving groove 39. Therefore, especially when the housing 37 is a casting having a large dimensional tolerance, the move allowance M tends to vary. .

  The elastic member 11 is preferably attached at least to the central portion and both ends in the circumferential direction of the retaining member 6, so that the retaining member 6 is elastic during the transition from the initial state to the set state and further to the load state. It strikes against the inner wall surface 91 through the member 11 in a well-balanced manner, and the variation in the movement allowance M can be effectively suppressed, and the load is not concentrated locally on the retaining member 6, thereby stabilizing the movement prevention effect of the water pipe P. Can be demonstrated. In this embodiment, the elastic member 11 is attached to the above three locations, but it may be attached to substantially the entire rear side surface 61 including these.

  A step portion 92a is formed on the inner wall surface 92 of the housing groove 9, and the holding member 12 is engaged with the step portion 92a in the initial state shown in FIG. According to such a configuration, since the retaining member 6 can be accurately positioned in the initial state, the retaining member 6 can be prevented from falling, and the distance between the rear side surface 61 and the inner wall surface 91 of the receiving groove 9 can be more accurately maintained. Thus, variation in the movement allowance of the retaining member 6 can be effectively suppressed.

  In this embodiment, since the projection provided on the holding member 12 in the initial state engages with the stepped portion 92a, the holding member 12 is firmly engaged with the inner wall surface 92, and the holding member in the initial state is thus engaged. 12 positioning accuracy can be improved. It should be noted that a protrusion may be provided on the upper part of the thick portion of the holding member 12 so that the protrusion engages with the stepped portion 92a in the set state. In this case, the retaining member in the set state 6 can be accurately positioned and the distance D can be maintained with higher accuracy, and variations in the movement allowance M can be effectively suppressed.

[Other Embodiments]
(1) The present invention is not limited to the embodiment described above, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, an example in which the side wall of the partition wall is formed in a stepped shape by the protruding portion along the both ends of the retaining member formed in the stepped shape by the overhanging portion has been shown. However, the shape and size of the protrusions can be changed as appropriate as long as an assembly error of the retaining member can be prevented as described above.

  (2) The fluid pipe movement preventing device according to the present invention can be applied to various products other than the push wheel within the scope of the present invention. For example, the fluid pipe movement prevention device according to the present invention may be applied to a slip-on type pipe joint, and the housing may be configured by a pipe receiving portion. In that case, the retaining member is housed in the housing groove formed on the inner peripheral surface of the receiving part, and in the set state, the claw of the retaining member is inserted into the mouth part of the fluid pipe inserted into the receiving part. It arrange | positions so that it can latch on an outer peripheral surface.

  Alternatively, a reinforcing metal fitting (for example, Japanese Patent Laid-Open No. Hei 10-109) that is mounted so as to surround the insertion portion of the pipe joint and that engages with the flange of the reception portion when a force is applied to pull out the insertion portion from the reception portion. The fluid pipe movement prevention device according to the present invention is applied to a non-average force support device (see, for example, Japanese Patent Application Laid-Open No. 2002-243066) that surrounds and is attached to a fluid pipe. It is also possible to form the housing with an annular main body included in the housing.

  (3) In the above-described embodiment, the example in which the retaining member is pressed by the push bolt attached to the housing is shown, but such a pressing member may be omitted. For example, if the housing is divided at a plurality of locations in the circumferential direction and the peripheral ends of the divided pieces are connected by a fastener, the housing is reduced in diameter by tightening the fastener. It becomes possible to press the retaining member.

  (4) In the present invention, the fluid pipe is not limited to a water pipe, and may be a fluid pipe through which various liquids and gases flow.

DESCRIPTION OF SYMBOLS 1 Receiving part 2 Inserting part 2a Outer peripheral surface 3 Sealing material 4 Push ring 6A 1st retaining member 6B 2nd retaining member 7 Housing 8A Front nail 8A Back nail 9 Housing groove 10 Push bolt 11 Elastic member 12 Holding member 20 Partition wall 20a Top surface 21 First protrusion 21a Inclined surface 22 Second protrusion 22a Inclined surface 60A Overhang portion 60B Overhang portion 61 Rear side surface (first side surface)
62 Front side (second side)
63 Inclined surface P Water pipe (an example of fluid pipe)

Claims (4)

In a fluid pipe movement prevention device that is externally fitted to a fluid pipe and prevents the fluid pipe from moving in the pipe axis direction,
A plurality of retaining members disposed at a plurality of locations in the circumferential direction of the fluid pipe and having claws capable of biting into the outer circumferential surface of the fluid pipe; and a receiving groove opened toward the outer circumferential surface of the fluid pipe. An annular housing for accommodating the retaining member in the accommodation groove,
A plurality of retaining members having a projecting portion projecting on both sides in the circumferential direction on one side of the inner peripheral surface in the tube axis direction, and a first retaining member having the claw formed on the projecting portion; And a second retaining member having a projecting portion projecting on both sides in the circumferential direction on the other side in the tube axis direction of the inner peripheral surface, and having the claw formed on the projecting portion,
The claw formed on the overhanging portion of the first retaining member and the claw formed on the overhanging portion of the second retaining member adjacent to the first retaining member are each the fluid. In a state that can be locked to the outer peripheral surface of the tube, arranged so as to overlap each other in the tube axis direction,
A partition wall interposed between the first retaining member housed in the housing groove and the second retaining member adjacent to the first retaining member is provided in the housing. ,
The partition wall protrudes in the circumferential direction on the other side in the tube axis direction of the side wall facing the first retaining member, and the overhang portion of the first retaining member accommodated in the accommodating groove And a first protrusion that opposes in the tube axis direction, and one side in the tube axis direction of the side wall facing the second retaining member protrudes in the circumferential direction, and is accommodated in the accommodating groove. 2 having a projecting portion of the retaining member and a second protrusion facing the tube axis direction ,
An inclined surface inclined toward the first retaining member side toward the radially outer side is formed on the side wall of the partition wall where the first protrusion is formed, and the second protrusion is formed. An apparatus for preventing movement of a fluid pipe, wherein an inclined surface inclined toward the second retaining member side is formed on a side wall of the partition wall toward a radially outer side .   The fluid pipe movement preventing device according to claim 1, wherein a top surface of the partition wall is set on a radially outer side than an inner peripheral surface of the housing. The fluid pipe movement prevention device according to claim 1 or 2, wherein the partition wall is formed integrally with the housing. An elastic member attached to the first side surface of the retaining member facing the moving direction of the fluid pipe, and a holding member attached to the second side surface of the retaining member facing the opposite side of the first side surface; With
In the process from the initial state to the set state in which the claw of the retaining member can be locked to the outer peripheral surface of the fluid pipe, while the holding member is in contact with the inner wall surface of the housing groove facing the second side surface, The fluid pipe movement prevention device according to any one of claims 1 to 3, wherein a distance between the first side surface and an inner wall surface of the receiving groove facing the first side surface is held via the elastic member.