JP2012215266A - Device and method for preventing movement of fluid pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for preventing movement of a fluid pipe, capable of preventing damage of the fluid pipe by causing claws of a coming-off prevention member to evenly bite thereinto.SOLUTION: This device includes: a coming-off prevention member 6 including a slope 63 having an outer diameter varying along an axial core direction, a front claw 8A formed at a front side where the outer diameter of the slope 63 is large, and a rear claw 8B formed at a rear side where the outer diameter of the slope 63 is small; and an annular housing 7 for housing the coming-off prevention member 6 in an housing groove 9 opened toward an outer circumferential surface 2a of a water pipe P. A pressing surface 13 pressing the slope 63 toward the radial inner side is provided at a distal end of a pressing bolt 10 attached to the housing groove 9. The pressing surface 13 is inclined relative to the slope 63. A separation part 13a separated from the slope 63 is formed at the front side of the pressing surface 13. An abutment part 13b abutting against the slope 63 is formed at the rear side of the pressing surface 13.

Description

  The present invention relates to a movement prevention device for externally fitting a fluid pipe and preventing the fluid pipe from moving in the axial direction, and a fluid pipe movement prevention method using the same.

  Patent Document 1 below describes a pusher wheel (ring for connection) as shown in FIG. 12 as a fluid pipe movement prevention device. The push ring 34 accommodates a plurality of retaining members 36 in the housing grooves 39 of the housing 37, and the claws 33, 38 of the retaining member 36 can be locked to the outer peripheral surface of the fluid pipe P in FIG. 12. The set state 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 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. Thus, the claws 33 and 38 bite 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.

  By the way, in the structure that exhibits such a wedge effect, when the fluid pipe P in the set state moves in the arrow direction F, the clockwise rotational force in FIG. The claw 38 formed on the front side (the right side in FIG. 12B) where the outer diameter of the inclined surface increases is pressed more strongly than the claw 33 formed on the rear side (the left side in FIG. 12B). Turned out to be. As a result, the load is biased toward the claw 38, and the claw 38 bites into the fluid pipe P too deeply, which may damage the outer peripheral surface and the inner surface lining of the fluid pipe P.

  In the movement preventing device described in the following Patent Document 2, in order to suppress the movement of the fluid pipe in the opposite direction (the direction opposite to the arrow direction F), a bulging portion is formed on the front side surface of the retaining member, The retaining member is configured to rotate counterclockwise around the bulging portion. However, since the apparatus has a configuration that is not different from that in FIG. 12B in the set state in which the external force for moving the fluid pipe is not applied, when the external force in the arrow direction F is applied, the forward direction as described above. The situation where the side nail bites unilaterally is unavoidable, and it still cannot prevent the fluid pipe from being damaged.

Japanese Utility Model Publication No. 4-39507 JP 2010-261546 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent movement of a fluid pipe and a movement prevention method by which the claw of the retaining member can be bitten evenly to prevent damage to the fluid pipe. Is to provide.

  A 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 axial direction, along the axial direction. An inclined surface that changes in outer diameter, a front claw that is formed on the front side where the outer diameter of the inclined surface increases and can be locked to the outer peripheral surface of the fluid pipe, and a rear side where the outer diameter of the inclined surface decreases A retaining member formed on the outer circumferential surface of the fluid pipe and having a rear claw that can be locked to the outer circumferential surface of the fluid pipe, and a retaining groove that opens toward the outer circumferential surface of the fluid pipe. An annular housing that accommodates the member, and a pressing surface that presses the inclined surface radially inward is provided at the tip of the pressing member attached to the receiving groove or the groove bottom of the receiving groove. Inclined with respect to the inclined surface and separated from the inclined surface on the front side of the pressing surface Separated portion is formed, in which the inclined surface abutment portion abutting is formed on the rear side of the pressing surface.

  In the fluid pipe movement preventing device according to the present invention, the pressing surface is inclined as described above with respect to the inclined surface, so that the front and rear claws of the retaining member can be locked to the outer peripheral surface of the fluid pipe. In such a state (set state), the rear claw is more strongly pressed than the front claw radially inward. Therefore, when a rotational force acts on the retaining member due to an external force that moves the fluid pipe, the front and rear claws evenly bite into the outer peripheral surface of the fluid pipe, thereby preventing damage to the fluid pipe. Can do.

  In the fluid pipe movement preventing device according to the present invention, it is preferable that the contact portion is located on the rear side of the rear claw. As a result, the radial inner side pressing by the pressing surface is preferentially transmitted to the rear nail, so that the posture in which the rear nail is pressed to the radial inner side more strongly than the front nail is accurately obtained, and the fluid pipe is moved. When an external force is applied, the front claw and the back claw can be bitten into the outer peripheral surface of the fluid pipe in a balanced manner.

  In the fluid pipe movement preventing device according to the present invention, the fluid pipe includes an elastic member attached to the rear side surface of the retaining member and a holding member attached to the front side surface of the retaining member. In the process of reaching the set state in which the front claw and the rear claw can be locked to the outer peripheral surface of the holding member, the holding member is in contact with the inner wall surface on the front side of the receiving groove, and the rear side surface of the retaining member What hold | maintains the space | interval with the inner wall face of the said accommodation groove facing it via the said elastic member is preferable.

  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 on the front side of the housing groove, and the distance between the rear side surface of the retaining member and the inner wall surface of the housing groove facing the retaining member is Since it is held via the elastic member, the movement allowance of the retaining member is determined without depending on the pressing amount of the retaining member by the pressing surface or the groove width of the receiving groove, and the inclination of the pressing surface with respect to the inclined surface is appropriate. The effectiveness of the present invention can be enhanced. Moreover, the movement prevention effect of the fluid pipe can be stably exhibited by suppressing variation in the movement allowance of the retaining member.

  In the fluid pipe movement prevention device according to the present invention, the pressing member is constituted by a pressing bolt attached to the receiving groove, and the center of the pressing surface provided at the tip of the pressing bolt is more than the rear claw. Those located on the rear side are preferred. Thereby, when a pressing surface is provided at the tip of a pressing bolt that is a pressing member, it becomes easy to preferentially transmit the pressing inward in the radial direction by the pressing surface to the rear claw. As a result, a posture in which the rear claw is pressed stronger in the radial direction than the front claw and an external force that moves the fluid pipe is applied accurately and the front claw and the rear claw are balanced in a balanced manner. It can bite into the outer peripheral surface of.

  In the fluid pipe movement prevention device according to the present invention, it is preferable that the inclination angle of the pressing surface with respect to the inclined surface is in a range of 1 to 5 °. By setting the inclination angle to 1 ° or more, the rear nail can be more easily pressed radially inward than the front nail, and the effectiveness of the present invention can be enhanced. Further, by setting the inclination angle to 5 ° or less, the retaining member can be appropriately pressed inward in the radial direction without causing the pressing surface to be inclined more than necessary.

  The fluid pipe movement prevention method according to the present invention is a fluid pipe movement prevention method for preventing the fluid pipe from moving in the axial direction, and has a receiving groove opened toward the outer peripheral surface of the fluid pipe. And attaching the annular housing in which the retaining member having an inclined surface whose outer diameter changes along the axial direction is accommodated in the accommodation groove to the fluid pipe, and the accommodation The inclined surface is pressed radially inward by the pressing surface provided at the tip of the pressing member attached to the groove or the groove bottom of the receiving groove, and the extraction formed on the front side where the outer diameter of the inclined surface increases. And a step of bringing the front claw of the stopper member and the rear claw of the retaining member formed on the rear side where the outer diameter of the inclined surface is small into a state that can be locked to the outer peripheral surface of the fluid pipe. The pressing surface is inclined with respect to the inclined surface; Square separation portion remote from the inclined surface side is formed, the contact inclined surface against the rear side of the pressing surface in which the contact portion is formed.

  In the fluid pipe movement prevention method according to the present invention, since the pressing surface is inclined as described above with respect to the inclined surface, the front and rear claws of the retaining member can be locked to the outer peripheral surface of the fluid pipe. In such a state (set state), the rear claw is more strongly pressed than the front claw radially inward. Therefore, when a rotational force acts on the retaining member due to an external force that moves the fluid pipe, the front and rear claws evenly bite into the outer peripheral surface of the fluid pipe, thereby preventing damage to the fluid pipe. Can do.

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 View of the pusher wheel viewed from the axial direction Development view of the pusher wheel as viewed from the inner circumference (A) BB sectional view and (B) CC sectional view of FIG. 3 in the initial state (A) BB sectional view of FIG. 3 in the set state, (B) CC sectional view, and (C) Enlarged view of inclined surface (A) BB sectional view and (B) CC sectional view of FIG. 3 in a loaded state The figure which shows the back side of a retaining member The figure which shows the front side surface of a retaining member The half sectional view of the pipe joint part which equipped with the reinforcement metal fittings which are an example of the movement prevention device of the fluid pipe concerning the present invention View of the reinforcing bracket viewed from the axial direction Cross-sectional view of the main part of the reinforcing bracket in (A) initial state and (B) set state (A) main part sectional view, (B) DD sectional view, and (C) EE sectional view in the set state of the conventional press wheel DD sectional view in the initial state DD cross section under load

  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 presser wheel 4 is mounted, and the cross-sectional portion corresponds to the AA cross section of 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 is inserted with T-head bolts 51 at a plurality of locations (six locations in the present embodiment) in the circumferential direction of the water pipe P, and the fastener 1 composed of the T-head bolts 51 and the nuts 52 is used. It is connected to the flange 1b. Further, the pusher wheel 4 is attracted to the flange 1b as the nut 52 is tightened, and compresses the sealing material 3 from the axial direction. The space between the inner peripheral surface of the receiving portion 1 and the outer peripheral surface 2a of the insertion portion 2 is sealed with a sealing material 3, and the insertion portion 2 is connected to the reception portion 1 in a watertight manner. The pusher wheel 4 includes retaining members 6 disposed at a plurality of locations (six locations in the present embodiment) in the circumferential direction of the water pipe P, and an annular housing 7.

  The retaining member 6 is formed on the inclined surface 63 whose outer diameter changes along the axial direction and on the front side (the right side in FIG. 1) where the outer diameter of the inclined surface 63 increases, and is locked to the outer peripheral surface 2a. It has a possible front claw 8A and a rear claw 8B which is formed on the rear side (left side in FIG. 1) where the outer diameter of the inclined surface 63 becomes smaller and can be locked to the outer peripheral surface 2a. The front claws 8A and the rear claws 8B are arranged at intervals in the axial direction, and the tips of the front claws 8A and 8B are curved with the same curvature as the outer peripheral surface 2a (see FIGS. 7 and 8), and are cut out in a triangular shape. The stopper member 6 protrudes from the inner peripheral surface. 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 members 6A and retaining members 6B as shown in FIG. 3 are adopted, and they are alternately arranged and are adjacent to each other in the circumferential direction. In the retaining members 6A and 6B, one of the front claws 8A and the rear claws 8B is arranged with the circumferential positions of both ends shifted from the other. That is, in the retaining member 6A, the front claw 8A projects in the circumferential direction from both ends of the rear claw 8B, and in the retaining member 6B, the rear claw 8B projects in the circumferential direction from both ends of the front claw 8A. The front claw 8A of the retaining member 6A and the rear claw 8B of the retaining member 6B are arranged so as to overlap each other in the axial direction.

  Thus, by arrange | positioning so that the nail | claw of adjoining retaining member 6A, 6B may be piled up in an axial direction, the circumference of the contact area | region of the nail | claw with respect to the outer peripheral surface 2a is increased, and the movement prevention effect of the water pipe P is carried out. Can be increased. When such an overlapping arrangement of the claws is adopted, there is a possibility that the claws may interfere with each other 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 margin M of the retaining member 6 can be made uniform as will be described later, such a problem can be prevented.

  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. The accommodation groove 9 is formed in an annular shape along the circumferential direction of the water pipe P and accommodates a plurality of retaining members 6 at a time, but is not limited thereto, and the accommodation groove 9 is intermittently recessed. The retaining member 6 may be accommodated 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.

  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 of the housing 7. The push bolt 10 is screwed into a female screw hole that penetrates the groove bottom of the housing groove 9 in an oblique direction, and the retaining member 6 can be pushed in by rotating the push bolt 10. The push bolt 10 faces an inclined surface 63 formed at the center in the circumferential direction of the retaining member 6, and a pressing surface 13 that presses the inclined surface 63 radially inward is provided at the tip thereof. (See FIG. 5).

  The pusher 4 is configured such that a force that presses the retaining member 6 toward the water pipe P acts as the water pipe P moves in the axial direction. That is, when an external force that moves the water pipe P rearward is applied, the inclined surface 63 is pressed against the pressing surface 13 at the tip of the push bolt 10 to exert a wedge effect, and the retaining member 6 is directed toward the outer peripheral surface 2a. Thus, the claw 8A, 8B bites firmly by the pressing force, and the retaining action by the retaining member 6 can be enhanced to prevent the water pipe P from moving. 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.

  FIG. 4 shows an initial state before the claw 8 is locked to the outer peripheral surface 2a of the water pipe P, such as at the time of shipping and transporting or when starting an external fitting operation to the water pipe P. After the press ring 4 is fitted on 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. FIG. 1 described above also shows 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 direction of arrow F acts on the water pipe P in the set state, the retaining member 6 moves in the same direction as shown in FIG. 6 and exhibits the wedge effect described above, and the claws 8A and 8B bite firmly into the water pipe. The movement of the tube P is prevented. At this time, a clockwise rotational force in FIG. 6 tends to act on the retaining member 6. In this pusher wheel 4, the pressing surface 13 is inclined with respect to the inclined surface 63, and the forward force due to the rotational force is thereby increased. One-way biting of the claw 8A is suppressed, and damage to the water pipe P caused thereby is prevented.

  That is, as shown in FIG. 5, in the push wheel 4, the pressing surface 13 is inclined with respect to the inclined surface 63, and a separation portion 13 a that is separated from the inclined surface 63 is formed on the front side of the pressing surface 13. A contact portion 13b that contacts the inclined surface 63 is formed on the rear side. According to such a configuration, the pressing inward in the radial direction by the pressing surface 13 is preferentially transmitted to the rear claw 8B, and the rear claw 8B has a posture that is pressed more inward in the radial direction than the front claw 8A. When a rotational force acts on the retaining member 6 by an external force that moves the pipe P, the front claws 8A and the rear claws 8B bite into the outer peripheral surface 2a evenly.

  The contact portion 13b is preferably located on the rear side of the rear claw 8B. Thereby, the pressure inward in the radial direction by the pressing surface 13 is preferentially transmitted to the rear claw 8B, and a posture in which the rear claw 8B is pressed more strongly in the radial direction than the front claw 8A is accurately obtained. When an external force that moves the tube P is applied, the front claw 8A and the rear claw 8B can be bitten into the outer peripheral surface 2a evenly in a balanced manner. In the contact portion 13b, the pressing surface 13 and the inclined surface 63 are in substantially line contact, and P1 and P2 shown in FIG. 5 indicate the positions of the contact portion 13b and the rear claw 8B in the axial direction, respectively. .

  Moreover, in this embodiment, the center of the press surface 13 provided at the front-end | tip of the push bolt 10 is comprised so that it may be located in the back side rather than the back nail | claw 8B. Thereby, since the pressure to the inner side in the radial direction by the pressing surface 13 is preferentially transmitted to the rear claw 8B, and the posture in which the rear claw 8B is pressed more strongly in the radial direction than the front claw 8A can be accurately obtained, When an external force that moves the tube P is applied, the front claw 8A and the rear claw 8B can be bitten into the outer peripheral surface 2a evenly in a balanced manner. P <b> 3 shown in FIG. 5 indicates the position in the axial direction of the center of the pressing surface 13.

  The positional relationship between the contact portion 13b and the rear claw 8B described above or the positional relationship between the center of the pressing surface 13 and the rear claw 8B is preferably maintained in the process from the initial state to the load state. It may be achieved at least in the set state, and preferably held in the process from the initial state to the set state.

  In order to press the rear claw 8B more strongly inward in the radial direction than the front claw 8A, the inclination angle θ of the pressing surface 13 with respect to the inclined surface 63 is preferably 1 ° or more, and more preferably 2 ° or more. More preferably, it is 3 ° or more. Further, from the viewpoint of appropriately maintaining the function of the push bolt 10 for pushing the retaining member 6 radially inward, the inclination angle θ is preferably 5 ° or less, more preferably less than 5 °, More preferably, it is 4 ° or less.

  In order to enhance the effectiveness of the present invention, it is beneficial to maintain the inclination of the pressing surface 13 with respect to the inclined surface 63 in the process from the initial state to the set state. Therefore, the pusher wheel 4 includes the elastic member 11 attached to the rear side surface 61 of the retaining member 6 and the holding member 12 attached to the front side surface 62 of the retaining member 6, and changes from the initial state to the set state. In the process, the holding member 12 comes into contact with the inner wall surface 92 of the housing groove 9, and the interval between the rear side surface 61 and the inner wall surface 91 of the housing groove 9 facing it is held via the elastic member 11. It is composed. This will be described in detail below.

  As shown in FIG. 7, 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.

  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. 6B). )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. 4, 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. Also in the set state shown in FIG. 5, the holding member 12 contacts the inner wall surface 92 while the rear side surface 61 contacts the inner wall surface 91, and the interval D corresponding to the thickness of the elastic member 11 is also provided.

  In the load state shown in FIG. 6, 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 kept constant via the gap, the movement margin M of the retaining member 6 is determined without depending on the pushing amount of the retaining member 6 and the groove width of the receiving groove 9, and the pressure against the inclined surface 63 is determined. The effectiveness of the present invention can be enhanced by appropriately maintaining the inclination of the surface 13.

  Moreover, the movement prevention effect with respect to the water pipe P can be exhibited stably by suppressing the dispersion | variation in the movement allowance of the retaining member 6. FIG. 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. 13) between the retaining member 36 and the housing groove 39 in the initial state is smaller than the movement allowance M (FIG. 12), 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. In the initial state shown in FIG. 4, the holding member 12 is engaged with the step portion 92a. 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.

  A method for preventing the water pipe P from moving in the axial direction using the pusher wheel 4 will be briefly described. First, the annular housing 7 in which the retaining member 6 is accommodated in the accommodation groove 9 is externally attached to the water pipe P. Usually, in this process, the pusher wheel 4 is in an initial state as shown in FIG. Subsequently, the push bolt 10 is operated to push the retaining member 6 into a set state as shown in FIGS. That is, the inclined surface 63 is pressed radially inward by the pressing surface 13 so that the front claw 8A and the rear claw 8B of the retaining member 6 can be locked to the outer peripheral surface 2a.

  At this time, the pressing surface 13 is inclined with respect to the inclined surface 63 as described above, the separation portion 13a is formed on the front side of the pressing surface 13, and the contact portion 13b is formed on the rear side of the pressing surface 13. Thus, in the set state, the rear claw 8B is in a posture that is pressed more radially inward than the front claw 8A. As a result, when the external force that moves the water pipe P acts as shown in FIG. 6 and the rotational force acts on the retaining member 6, the front claws 8A and the rear claws 8B seem to bite into the outer peripheral surface 2a evenly. Thus, damage on the outer peripheral surface or inner lining of the water pipe P can be prevented.

  Further, according to the present embodiment, 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 rear side surface 61 of the retaining member and the housing groove facing it. 9 is held via the elastic member 11, so that the retaining member 6 is not affected by the pressing amount of the retaining member 6 by the pressing surface 13 or the groove width of the receiving groove 9. The movement allowance is determined, the inclination of the pressing surface 13 with respect to the inclined surface 63 is appropriately maintained, and the effectiveness of the present invention can be enhanced.

[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 half sectional 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 21, and the reinforcing metal fitting 24 externally attached to the water pipe P is used in the axial direction of the water pipe P. This prevents the movement of the insertion portion 2 from being separated from the insertion portion 21. A space between the inner peripheral surface of the receiving portion 21 and the outer peripheral surface 2 a of the insertion portion 2 is sealed with a compressed sealing material 23.

  As shown in FIGS. 9 and 10, the reinforcing metal fittings 24 are provided with retaining members 6 disposed at a plurality of locations in the circumferential direction of the water pipe P, and accommodation grooves 29 opened toward the outer peripheral surface 2 a of the insertion portion 2. And an annular housing 27 for accommodating the retaining member 6 therein. The retaining member 6 includes the inclined surface 63, the front claw 8A, and the rear claw 8B as described in the first embodiment. The elastic member 11 is attached to the rear side surface 61 of the retaining member 6, and the holding member 12 is attached to the front side surface 62 of the retaining member 6.

  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 divided pieces are assembled to each other with the fasteners 25. It can be attached to the existing water pipe P. The housing 27 is provided with a hook 27b extending to the back surface of the flange 21b of the receiving portion 21. When an external force is applied to the water pipe P to the rear side, the hook 27b engages with the flange 21b. It is configured as follows.

  In the present embodiment, a pressing surface 26 that presses the inclined surface 63 radially inward is provided at the groove bottom of the accommodation groove 29 that faces the inclined surface 63. That is, when the fastener 25 is tightened from the initial state of FIG. 11A to reduce the diameter of the housing 27, the pressing surface 26 presses the inclined surface 63 of the retaining member 6 to the set state of FIG. 11B. The front claw 8A and the rear claw 8B can be locked to the outer peripheral surface 2a. In the initial state before the claws 8A and 8B are locked to the outer peripheral surface 2a, the retaining member 6 is held in the receiving groove 29 so as not to drop off.

  The pressing surface 26 is inclined with respect to the inclined surface 63, a separation portion 26 a that is separated from the inclined surface 63 is formed on the front side of the pressing surface 26, and the pressing surface 26 is in contact with the inclined surface 63 on the rear side of the pressing surface 26. A contact portion 26b is formed. Therefore, when the rear claw 8B is pressed to the inner side in the radial direction stronger than the front claw 8A, when the rotational force acts on the retaining member 6 by the external force that moves the water pipe P, the front claw 8A and the rear claw 8B. Bite into the outer peripheral surface 2a evenly.

  Further, in the process from the initial state to the set state, the retaining member 6 is pushed obliquely by the pressing surface 26, but the holding member 12 is in contact with the inner wall surface of the receiving groove 29 and the elastic member 11 is interposed therebetween. The interval D is kept constant. Therefore, also in this reinforcing metal fitting 24, the movement allowance M of the retaining member 6 is made uniform without being affected by the pushing amount of the retaining member 6 or the groove width of the receiving groove 29, thereby enhancing the effectiveness of the present invention. In addition, the effect of preventing the movement of the water pipe P can be stably exhibited.

  In this reinforcing metal fitting 24, the pressing surface 26 is provided at the groove bottom of the receiving groove 29. Instead, the push bolt 10 as in the first embodiment is attached to the receiving groove 29 and provided at the tip thereof. A structure may be adopted in which the inclined surface 63 of the retaining member 6 is pressed by the pressing surface. Conversely, in the press wheel 4 shown in the first embodiment, the inclined surface 63 may be pressed by a pressing surface provided at the groove bottom of the housing groove 9, and the pressing 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) The pressing member attached to the receiving groove is not limited to the pressing bolt having the above-described configuration, and a pressing bolt having a different structure, shape and arrangement, or a combination of the pressing bolt and another member. It does not matter. Of course, the pressing member is not limited to one using a pressing bolt.

  (3) 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 retaining member 7 housing 8A rear claw 8B front claw 9 receiving groove 10 push bolt (an example of a pressing member)
DESCRIPTION OF SYMBOLS 11 Elastic member 12 Holding member 13 Press surface 13a Separation part 13b Contact part 24 Reinforcement metal fitting (an example of a fluid pipe movement prevention device)
26 Pressing surface 26a Separating portion 26b Contacting portion 27 Housing 29 Housing groove 61 Rear side surface 62 Front side surface 63 Inclined surface 91 Inner wall surface 92 Inner wall surface P Water pipe (an example of a fluid pipe)

Claims (6)

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,
An inclined surface whose outer diameter changes along the axial direction, a front claw that is formed on the front side where the outer diameter of the inclined surface increases and can be locked to the outer peripheral surface of the fluid pipe, and A retaining member formed on the rear side with a smaller outer diameter and having a rear claw that can be locked to the outer peripheral surface of the fluid pipe;
A housing groove that opens toward the outer peripheral surface of the fluid pipe, and an annular housing that houses the retaining member in the housing groove;
A pressing surface for pressing the inclined surface radially inward is provided at the tip of the pressing member attached to the receiving groove or the groove bottom of the receiving groove,
The pressing surface is inclined with respect to the inclined surface, a separation portion that is separated from the inclined surface is formed on the front side of the pressing surface, and a contact portion that contacts the inclined surface is formed on the rear side of the pressing surface. An apparatus for preventing movement of a fluid pipe, wherein   The fluid pipe movement prevention device according to claim 1, wherein the contact portion is positioned rearward of the rear claw. An elastic member attached to the rear side surface of the retaining member; and a holding member attached to the front side surface of the retaining member;
In the process from the initial state to the set state in which the front claw and the rear claw can be locked to the outer peripheral surface of the fluid pipe, the holding member is in contact with the inner wall surface on the front side of the housing groove, and the removal is performed. 3. The fluid pipe movement prevention device according to claim 1, wherein a distance between a rear side surface of the stopper member and an inner wall surface of the receiving groove facing the stopper member is held via the elastic member.   The pressing member is configured by a pressing bolt attached to the receiving groove, and the center of the pressing surface provided at the tip of the pressing bolt is located rearward of the rear claw. The apparatus for preventing movement of a fluid pipe according to item 1.   The fluid pipe movement prevention device according to any one of claims 1 to 4, wherein an inclination angle of the pressing surface with respect to the inclined surface is in a range of 1 to 5 °. In the fluid pipe movement prevention method for preventing the fluid pipe from moving in the axial direction,
An annular housing having an accommodation groove that opens toward the outer peripheral surface of the fluid pipe, and a retaining member that has an inclined surface whose outer diameter changes along the axial direction. Attaching to the fluid pipe,
The inclined surface is pressed radially inward by the pressing surface provided at the tip of the pressing member attached to the receiving groove or the groove bottom of the receiving groove, and formed on the front side where the outer diameter of the inclined surface becomes large. Making the front claw of the retaining member and the rear claw of the retaining member formed on the rear side where the outer diameter of the inclined surface is small, engageable with the outer peripheral surface of the fluid pipe; With
The pressing surface is inclined with respect to the inclined surface, a separation portion that is separated from the inclined surface is formed on the front side of the pressing surface, and a contact portion that contacts the inclined surface is formed on the rear side of the pressing surface. A method for preventing movement of a fluid pipe, characterized in that:

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