JP5570293B2 - 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 axial direction.

  As such a fluid pipe movement prevention device, there is known a push ring (coupling ring) as shown in FIG. 12 (Patent Document 1 below). The push ring 34 accommodates a plurality of retaining members 36 in the housing grooves 39 of the housing 37, and in FIG. 12, 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. Is shown. FIG. 13 shows an initial state such as when transporting or starting an external fitting operation. After the press ring 34 is externally attached to the fluid pipe P, the retaining member 36 is pushed in with the push bolt 31 to set the configuration 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. 14 shows a load state when a load in the arrow direction F acts on the fluid pipe P. When the fluid pipe P is about to move in the arrow direction F from the set state, the outer peripheral surface of the retaining member 36 is strongly pressed against the tip of the push bolt 31 and the force that presses the retaining member 36 toward the fluid pipe P is accordingly accompanied. , The claw 38 bites in firmly, and the movement of the fluid pipe P in the axial direction can be prevented. 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.

  In the initial state, the distance D between the retaining member 36 and the housing groove 39 is smaller than the movement allowance M, and when the retaining member 36 is pushed in the process of reaching the set state, the distance D increases accordingly and moves in the set state. It becomes generation M. For this reason, there is a situation in which the movement allowance M can be changed according to the pushing amount of the retaining member 36, and there is a problem that the displacement allowance M of the retaining member 36 varies in the set state. Further, even if the pushing amount is constant, if the groove width of the accommodation groove 39 is different, the movement allowance M changes accordingly. Therefore, especially when the housing 37 is a casting with a large dimensional tolerance, the move allowance M Tends to vary.

  Such variation in the movement allowance makes the function of preventing the movement of the fluid pipe in the axial direction unstable. For example, the retaining member located on the upper side of the fluid pipe and the removal member located on the lower side of the fluid pipe. If the movement allowance is different between the stopper member and the stopper member, the effect of preventing the movement of the fluid pipe tends to be hardly exhibited stably. In particular, when a strong load is applied to the fluid pipe, the ultimate performance may be affected by variations in the movement allowance of the retaining member.

Japanese Utility Model Publication No. 4-39507

  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 stably exhibiting the movement prevention effect of the fluid pipe by suppressing variation in the movement allowance of the retaining member. There is to do.

An apparatus for preventing movement of a fluid pipe according to the present invention is the apparatus for preventing movement of a fluid pipe that is externally attached to the fluid pipe and prevents the fluid pipe from moving in the axial direction. A retaining member disposed at a plurality of locations and having a claw capable of biting into an outer peripheral surface of the fluid pipe; and a housing groove opened toward the outer circumferential surface of the fluid pipe, and the retaining groove is provided in the housing groove. An annular housing for accommodating the member, an elastic member attached to the first side surface of the retaining member facing the moving direction of the fluid pipe, and a first member of the retaining member facing the opposite side of the first side surface A holding member attached to two side surfaces, and the housing groove facing the second side surface in a process from an initial state to a set state in which the claw of the retaining member can be locked to the outer peripheral surface of the fluid pipe The first side surface while the holding member contacts the inner wall surface And the interval between the inner wall surface of the accommodating groove facing is held via the elastic member, the outer peripheral surface of the retainer member, have inclined surfaces whose diameter is formed along the travel direction of the fluid pipe The retaining member is configured to be pressed against the outer peripheral surface of the fluid tube by the wedge effect when an external force that moves the fluid tube in the axial direction is applied.

  In the fluid pipe movement preventing device according to the present invention, in the process from the initial state to the set state, the holding member is in contact with the inner wall surface of the receiving groove facing the second side surface of the retaining member, Since the distance between the first side surface and the inner wall surface of the housing groove facing the first side surface is held via the elastic member, the movement of the retaining member is not affected by the pushing amount of the retaining member or the groove width of the housing groove. As a result, the 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.

  In the present invention, it is preferable that the elastic member is attached to a central portion and both end portions in the circumferential direction of the retaining member. Thereby, in the initial state or the set state, the retaining member is prevented from contacting the inner wall surface of the receiving groove locally through the elastic member, and the distance between the first side surface and the inner wall surface of the receiving groove is maintained. Thus, variation in the movement allowance of the retaining member can be effectively suppressed. In addition, even in a loaded state, the load is not concentrated locally on the retaining member, which is beneficial for stably exhibiting the effect of preventing movement of the fluid pipe.

  In the above, it is preferable that, in the initial state, the holding member engages with a step portion formed on an inner wall surface of the receiving groove facing the second side surface. According to such a configuration, since the retaining member can be accurately positioned in the initial state, the retaining member can be prevented from falling, and the spacing between the first side surface and the inner wall surface of the housing groove can be more accurately maintained, and the retaining member can be removed. The variation in the movement allowance of the stop member can be effectively suppressed.

  In the above, the holding member may be provided with a protrusion that engages with the stepped portion. According to such a configuration, the holding member can be firmly engaged with the stepped portion, and the retaining member can be positioned with high accuracy in the initial state or the set state, so that variation in movement allowance can be effectively suppressed.

The half sectional view of the pipe joint part equipped with the push ring which is an example of the movement prevention device of the fluid pipe concerning the present invention A view of the pusher wheel viewed from the axial direction Development view of the pusher wheel as viewed from the inner circumference The figure which shows the 1st side surface of a retaining member The figure which shows the 2nd side surface of a retaining member (A) BB arrow sectional view and (B) CC arrow sectional view of FIG. 3 in the initial state (A) BB arrow sectional view and (B) CC arrow sectional view of FIG. 3 in the set state (A) BB arrow sectional view and (B) CC arrow sectional view of FIG. 3 in a loaded state The top view of the pipe joint part which attached the reinforcement metal fitting which is an example of the movement prevention apparatus of the fluid pipe | tube which concerns on this invention (A) Half sectional view and (B) Enlarged view of the main part of the reinforcing bracket in the set state Cross section of the main part in the initial state of the reinforcing bracket (A) main part sectional view, (B) DD arrow sectional view and (C) EE arrow sectional view in the set state of the conventional press wheel DD arrow sectional view in the initial state DD arrow sectional view in the loaded state

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
1st Embodiment shows the example which applied the movement prevention apparatus of the fluid pipe | tube which concerns on this invention to a press ring. FIG. 1 is a half cross-sectional view of a pipe joint portion to which the pusher wheel 4 is attached, and corresponds to a cross-sectional view taken along the line AA in FIG. In this pipe joint portion, a port portion 2 of a ductile cast iron water pipe P (an example of a fluid pipe) is inserted and connected to a mouth portion 1 of a pipe or a pipe joint body. The attached push ring 4 is configured to prevent the water pipe P from moving in the axial direction and to prevent the insertion portion 2 from being removed from the receiving portion 1.

  The pusher wheel 4 has bolt insertion holes 41 at a plurality of locations (six locations in the present embodiment) in the circumferential direction of the water pipe P, and is received by a fastener 5 composed of T-head bolts 51 and nuts 52 inserted therethrough. It is connected to the flange 1 b of the mouth 1. The sealing material 3 seals between the inner peripheral surface 1 a of the receiving portion 1 and the outer peripheral surface 2 a of the insertion portion 2, and is compressed from the axial direction by the pusher wheel 4. As shown in FIGS. 3 to 5, the push wheel 4 includes a retaining member 6, an annular housing 7, an elastic member 11, and a holding member 12.

  The retaining members 6 are arranged at a plurality of locations (six locations in the present embodiment) in the circumferential direction of the water pipe P, and have claws 8 that can bite into the outer peripheral surface 2a of the water pipe P. The retaining member 6 is made of a robust material such as metal, and specifically cast iron is exemplified. In the present embodiment, two claws 8 are provided on the inner circumferential surface of the retaining member 6 so as to be spaced apart in the axial direction, and the tips of the claws 8 are arranged on the outer circumferential surface 2a of the water pipe P. As shown in FIGS. 6 to 8, the cross section is formed in a triangular shape. The number of the claws 8 included in the retaining member 6 may be one or three or more.

  The housing 7 has an accommodation groove 9 that opens toward the outer peripheral surface 2 a of the water pipe P, and accommodates the retaining member 6 in the accommodation groove 9. The housing groove 9 is formed in an annular shape along the circumferential direction of the water pipe P, but may be intermittently recessed so as to house the retaining member 6 individually. In this embodiment, the housing 7 is integrally formed in an annular shape. However, 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.

  The elastic member 11 is attached to the first side surface 61 of the retaining member 6 facing the moving direction of the water pipe P (left direction in FIG. 1, arrow direction F in FIG. 8). In the present embodiment, the elastic member 11 is formed in a sheet shape, and is attached to substantially the entire area of the first side surface 61 including 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 first side surface 61, sticking with an adhesive or adhesive, baking of rubber, lining, or the like can be used.

  The holding member 12 is attached to the second side surface 62 of the retaining member 6 facing the opposite side of the first side surface 61 (the right direction in FIG. 1). In the present 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 on the upper portion of the thick portion (FIG. 8B )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 second side surface 62, the above-described sticking, baking, lining, or the like can be used.

  The push ring 4 of this embodiment includes a push bolt 10 as a pressing member that presses the retaining member 6 toward the outer peripheral surface 2a of the water pipe P. The housing 7 has a female screw hole 7 a that penetrates the outer peripheral wall of the housing groove 9 in an oblique direction, and the tip of the push bolt 10 screwed into the female screw hole 7 a is at the center in the circumferential direction of the retaining member 6. Opposite. By rotating the push bolt 10 and pushing the retaining member 6 in, the transition from the initial state to the set state is performed.

  Further, the pusher wheel 4 is configured such that a force that presses the retaining member 6 toward the water pipe P side acts as the retaining member 6 moves in the axial direction. That is, an inclined surface 63 having a small diameter in the moving direction of the water pipe P is formed on the outer peripheral surface of the retaining member 6. When an external force that moves the water pipe P is applied, the inclined surface 63 is The retaining member 6 is pressed against the outer peripheral surface 2 a of the water pipe P by pressing against the tip of the push bolt 10 to exert a wedge effect.

  FIG. 6 shows an initial state before the claw 8 is locked to the outer peripheral surface 2a of the water pipe P, such as when shipping and transporting, or when an external fitting operation to the water pipe P is started. The holding member 12 is interposed between 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 inner wall surface 92 of the housing groove 9 facing the second side surface 62. The stop member 6 is urged toward the inner wall surface 91 and is held 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 first side surface 61 leaving a compression allowance, and the holding member 12 contacts the inner wall surface 92 facing the second side surface 62. A space D is provided between the side surface 61 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.

  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 claw 8 protrudes from the housing groove 9 as shown in FIG. The set state can be locked. The nail | claw 8 in a set state should just be caught on the outer peripheral surface 2a, and may bite into the outer peripheral surface 2a a little. Also in this set state, the holding member 12 is in contact with the inner wall surface 92 while the first side surface 61 is in contact with the inner wall surface 91, and the interval D corresponding to the thickness of the elastic member 11 is provided as described above.

  When the load in the arrow direction F acts on the water pipe P in the set state, the retaining member 6 moves in the same direction due to the hook of the claw 8, and the elastic member 11 is compressed to be in a load state as shown in FIG. At this time, the front end of the push bolt 10 is strongly pressed against the inclined surface 63, and the claw 8 of the retaining member 6 pressed toward the water pipe P side firmly bites into the outer peripheral surface 2a. Can be prevented. The movement margin M of the retaining member 6 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 movement margin M.

  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, even when the push-in amounts of the retaining members 6 are different from each other, or even when the housing 7 is cast (for example, cast iron) and the dimensional tolerance is large, the variation in the movement allowance M is suppressed, and the water pipe The effect of preventing movement of P can be stably exhibited, and in particular, it can contribute to improvement of ultimate performance.

  In this embodiment, since the push bolt 10 has a structure that presses the inclined surface 63 of the retaining member 6, the retaining member 6 is single-tightened (the retaining member 6 is pushed to be biased toward one side in the axial direction). However, since the holding member 12 urges the retaining member 6 toward the inner wall surface 91 in the process of shifting from the initial state to the set state, the influence of such one-side tightening is affected. It is easy to relax and keep the distance D constant.

  The elastic member 11 is preferably attached at least to the center and both ends in the circumferential direction of the retaining member 6, so that the retaining member 6 is moved from the initial state to the set state and further to the load state. While pressing against the inner wall surface 91 in a balanced manner via the elastic member 11, the variation in the movement allowance M can be effectively suppressed, and the load is not concentrated locally on the retaining member 6, thereby preventing the movement of the water pipe P. This is useful for stable performance. The elastic member 11 of this embodiment is attached to substantially the entire area of the first side surface 61 including the above three locations.

  A step portion 92a is formed on the inner wall surface 92 of the receiving groove 9, and in the initial state shown in FIG. 6, the holding member 12 is engaged with the step portion 92a. For this reason, in the initial state, the retaining member 6 can be accurately positioned and the interval D can be maintained with higher accuracy, and variations in the movement allowance M of the retaining member 6 can be effectively suppressed.

  In the present embodiment, since the protrusion provided on the holding member 12 engages with the stepped portion 92a in the set state shown in FIG. 7, the holding member 12 can be firmly engaged with the stepped portion 92a. It is possible to accurately position the retaining member 6 in the set state and maintain the distance D with higher accuracy, and to effectively suppress the variation in the movement allowance M. In addition, it is also possible to improve the positioning accuracy of the holding member 12 in the initial state by providing a protrusion below the thick portion of the holding member 12 and engaging the protrusion with the stepped portion 92a.

[Second Embodiment]
Since the second embodiment has the same configuration and operation as those of the first embodiment except for the configuration described below, common points will be omitted and mainly the differences will be described. In addition, the same code | symbol is attached | subjected to the member same as the member demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.

  In 2nd Embodiment, the example which applied the movement prevention apparatus of the fluid pipe | tube which concerns on this invention to the reinforcement metal fitting is shown. FIG. 9 is a plan view of the pipe joint portion to which the reinforcing metal fitting 24 is attached. In this pipe joint portion, the insertion portion 2 of the water pipe P is inserted and connected to the receiving portion 1, and the reinforcing metal fitting 24 externally attached to the water pipe P is used in the axial direction of the water pipe P. The movement of the insertion portion 2 is prevented, and as a result, the separation of the insertion portion 2 from the receiving portion 1 can be prevented. A space between the receiving portion 1 and the insertion portion 2 is sealed with a sealing material 3 compressed by a push ring 14.

  As shown in FIG. 10, the reinforcing metal fittings 24 are disposed at a plurality of locations in the circumferential direction of the water pipe P, and the retaining members 6 having claws 8 that can bite into the outer circumferential surface 2 a of the water pipe P, and the outer circumferential surface thereof. A housing groove 29 that opens toward 2 a, an annular housing 27 that houses the retaining member 6 in the housing groove 29, an elastic member 11 attached to the first side surface of the retaining member 6, And a holding member 12 attached to the second side surface of the stop member 6. Detailed descriptions of the retaining member 6, the elastic member 11, and the holding member 12 are omitted.

  The housing 27 has a divided structure that is divided at a plurality of locations in the circumferential direction (two locations in the present embodiment), and the flanges 27a formed at the peripheral ends of the respective divided pieces are assembled to each other with the fasteners 25. It can also be attached to an existing water pipe P. The housing 27 is provided with a hook 27b extending to the back surface of the flange 1b of the receiving portion 1. When a load in the moving direction (left direction in FIG. 10) is applied to the water pipe P, the hook 27b. Engages the flange 1b.

  An inclined surface 29a having a smaller diameter in the moving direction of the water pipe P is formed on the outer peripheral wall of the housing groove 29. In the set state shown in FIG. 10, a retaining member pushed in by the inclined surface 29a. Six claws 8 can be locked to the outer peripheral surface 2a. As shown in FIG. 11, in the initial state before the claw 8 is locked to the outer peripheral surface 2a, the retaining member 6 is held in the receiving groove 29 so as not to drop off, and the fastener 25 is tightened from this state. When the diameter of the housing 27 is reduced, the inclined surface 29a can press the inclined surface 63 of the retaining member 6 to shift to the set state.

  In the process from the initial state to the set state, the retaining member 6 is pushed obliquely by the inclined surface 29a, but the holding member 12 is in contact with the inner wall surface of the housing groove 29 and the interval D is interposed via the elastic member 11. Is held constant. Therefore, also in this reinforcing metal fitting 24, the movement margin M of the retaining member 6 is made uniform without depending on the pushing amount of the retaining member 6 and the groove width of the receiving groove 29, and the water pipe P is prevented from moving. Can be demonstrated stably.

  In the reinforcing bracket 24, the retaining member 6 is configured to be pressed toward the outer peripheral surface 2a by the inclined surface 29a. Instead, the retaining member 6 is configured by the push bolt 10 as in the first embodiment. You may make it the structure which presses. Conversely, in the pusher wheel 4 shown in the first embodiment, the inclined surface as described above may be formed on the outer peripheral wall of the housing groove 9 and the push bolt 10 may be omitted.

[Other Embodiments]
(1) In the above-described embodiment, an example in which the fluid pipe movement prevention device according to the present invention is applied to a press wheel or a reinforcing bracket has been described. It is possible to make improvements and changes. For example, the housing may be constituted by a tube receiving portion, and the fluid pipe movement prevention device according to the present invention may be applied to a slip-on type pipe joint portion. The retaining member is accommodated in the formed accommodation groove, and in the set state, the claw of the retaining member is disposed so as to be able to be engaged with the outer peripheral surface of the insertion portion of the fluid pipe inserted into the receiving portion.

  (2) In the present invention, in the set state, the claws of the retaining members adjacent in the circumferential direction may be arranged so as to overlap each other in the axial direction. Thereby, the circumference of the contact area | region of the nail | claw with respect to the outer peripheral surface of a fluid pipe | tube can be increased, and the movement prevention effect of a fluid pipe | tube can be heightened. In this way, when the claw is overlapped, if the movement of the retaining member varies, the retaining members adjacent in the circumferential direction may interfere with each other. Since the movement allowance of the stop member can be made uniform, such a problem can be prevented.

  (3) When a push bolt that presses the retaining member toward the water pipe is provided, the direction of the push bolt is not limited to the oblique direction as shown in the first embodiment, and the radial direction and the axial direction of the fluid pipe It does not matter. In this case, what is necessary is just to modify | change so that the inclined surface of a retaining member may be pressed with the intermediate member arrange | positioned at the front end side of a pushing bolt, or the taper taper surface formed in the side surface of the front-end | tip part of a pushing bolt.

  (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.

4 Pusher (an example of a fluid pipe movement prevention device)
6 Detachment member 7 Housing 8 Claw 9 Receiving groove 10 Push bolt 11 Elastic member 12 Holding member 24 Reinforcing bracket (an example of a fluid pipe movement prevention device)
27 Housing 29 Housing groove 61 First side surface 62 Second side surface 91 Inner wall surface 92 Inner wall surface 92a Step F Fluid pipe moving direction P Water pipe (an example of a fluid pipe)

Claims (4)

In a fluid pipe movement preventing device that is externally fitted to a fluid pipe and prevents the fluid pipe from moving in the axial direction,
A retaining member disposed at a plurality of locations in the circumferential direction of the fluid pipe and having a claw 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 that houses the retaining member in the housing groove, an elastic member that is attached to the first side surface of the retaining member that faces the moving direction of the fluid pipe, and that faces away from the first side surface. A holding member attached to the second side surface of the retaining member,
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 holding member is in contact with the inner wall surface of the receiving groove facing the second side surface. The distance between the first side surface and the inner wall surface of the housing groove facing the first side surface is held via the elastic member ,
An inclined surface having a small diameter in the moving direction of the fluid pipe is formed on the outer peripheral surface of the retaining member, and when the external force that moves the fluid pipe in the axial direction acts, the retaining member Is pressed against the outer peripheral surface of the fluid pipe by the wedge effect .
  The fluid pipe movement prevention device according to claim 1, wherein the elastic member is attached to a central portion and both end portions in a circumferential direction of the retaining member.   3. The fluid pipe movement prevention device according to claim 1, wherein in the initial state, the holding member engages with a step portion formed on an inner wall surface of the receiving groove facing the second side surface.   The fluid pipe movement preventing device according to claim 3, wherein the holding member is provided with a protrusion that engages with the stepped portion.

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