JP4907234B2 - Means for preventing movement of fluid pipe - Google Patents

Description

  The present invention provides a fluid that is formed over the circumferential direction of a fluid pipe and that is provided in an accessory having a divided structure in which the peripheral ends of the fluid pipes can be assembled, and prevents movement of the fluid pipe in the pipe axis direction. The present invention relates to a pipe movement prevention means.

  The conventional fluid pipe movement preventing means is provided, for example, in a joint body as an accessory part for connecting the receiving port and the insertion port constituting the fluid pipe, and in a recess provided on the inner surface of the joint body, A locking portion having a tip claw is housed along the circumferential direction, and this locking portion is pressed toward the outer surface of the fluid pipe to bite and lock the tip claw on the outer surface. The movement of the fluid pipe is prevented (see, for example, Patent Document 1).

  In addition, the conventional fluid pipe movement preventing means is provided on a support body as an accessory part installed in a straight line portion or the like excluding the insertion opening or receiving opening of the fluid pipe, and the movement of the fluid pipe in the tube axis direction. Some have prevented the above (for example, see Patent Document 2).

Registered Utility Model No. 2533132 (2nd page, Fig. 3) Japanese Patent Laid-Open No. 2002-5336 (page 3, FIG. 3)

  However, in Patent Literature 1 or Patent Literature 2, when the peripheral end portions of the accessory parts are assembled together, the pressing force of the locking portion toward the outer surface of the fluid pipe is generated unevenly in the circumferential direction. In such a case, there is a possibility that the force for locking the fluid pipes uniformly in the circumferential direction of the fluid pipes cannot be maintained, and the movement of the fluid pipes in the pipe axis direction cannot be reliably prevented.

  In addition, in order to secure the pressing force of the locking portion toward the outer surface of the fluid pipe, a push bolt inserted from the outer surface of the accessory part toward the inside of the recess is appropriately configured and locked by screwing this pressing bolt. In such a case, the configuration of the accessory parts with the push bolts is complicated, and the adjustment of the screwing is difficult, and the fluid pipe extends in the circumferential direction. In order to maintain the force to lock the fluid pipe evenly, it takes time and effort.

  The present invention has been made paying attention to such problems, and by assembling the peripheral end portions of the accessory parts, the pressing force of the locking portion toward the outer surface of the fluid pipe is not improved in the circumferential direction. It is an object of the present invention to provide a fluid pipe movement preventing means capable of maintaining a force for evenly locking the fluid pipe over the circumferential direction of the fluid pipe even when it occurs evenly.

In order to solve the above-mentioned problem, the fluid pipe movement prevention means according to claim 1 of the present invention is formed so as to be formed in the circumferential direction of the fluid pipe, and the peripheral end portions of the fluid pipe can be assembled. A fluid pipe movement preventing means provided on an accessory part having a structure for preventing movement of the fluid pipe in the pipe axis direction,
And the locking portion having a distal end claw for locking along the outer peripheral surface in the circumferential direction of the fluid pipe, inside an open along the circumferential direction the locking portion toward the outer circumferential surface of said fluid tube A recess for accommodating,
The concave portion that accommodates the locking portion is divided into a plurality along the outer peripheral direction of the fluid pipe , and the tip claw is attached by assembling the peripheral end portion of the accessory having the divided structure. to evenly engage the outer peripheral surface in the circumferential direction of said fluid conduit, at least a portion of the inner bottom surface of the recess, bulging surface which bulges toward an outer circumferential surface of said fluid tube is formed It is characterized by that.
According to this feature, by attaching the peripheral end portions of the accessory parts to each other, even when the pressing force generated in the locking portion toward the outer surface of the fluid pipe is uneven in the circumferential direction, the locking portion is Since the bulging surface is used as a reaction force and the tip claw bites into the outer surface of the fluid tube, the force for evenly locking the fluid tube can be maintained over the circumferential direction of the fluid tube. In addition, since the bulging surface is formed on the inner bottom surface of the recess, a general-purpose locking part having a cross-sectional shape including the tube axis substantially equal to the circumferential direction is used without requiring a separate process for the shape of the locking part. it can.

Movement prevention means for fluid tube according to claim 2 of the present invention is a movement prevention means for fluid tube according to claim 1, wherein the bulging surface, the recess along the outer circumferential direction of the fluid pipe The degree of bulging is gradually reduced toward the non-bulged surface of the inner bottom surface.
According to this feature, since the smooth transition towards the bulged surface to the non-bulging surface, the tip claw engaging portion bites into the outer circumferential surface of the gradually fluid pipe along the outer circumferential direction of the fluid pipe, It becomes easy to latch continuously along the circumferential direction.

The fluid pipe movement prevention means according to claim 3 of the present invention is the fluid pipe movement prevention means according to claim 1 or 2, wherein the recesses for accommodating the locking portions are adjacent to each other. The recessed part which was made is divided by the partition wall, It is characterized by the above-mentioned.
According to this feature, since the plurality of recesses are partitioned by the partition wall, not only a structurally strong shape can be obtained, but also the locking portions can be independently accommodated in the plurality of recesses. The locking portion can be installed orderly, and the fluid pipe can be locked in a stable state without being affected by the adjacent locking portion.

The fluid pipe movement preventing means according to claim 4 of the present invention is the fluid pipe movement preventing means according to any one of claims 1 to 3, wherein the bulging surface has the divided structure. It is formed in the inner bottom face of the said recessed part in the vicinity of the peripheral edge part of this.
According to this feature, by attaching the peripheral end portions of the accessory parts to each other, the tip claw bulges in the vicinity of the peripheral end portion where the pressing force of the locking portion toward the outer surface of the fluid pipe is particularly insufficient. Is used as a reaction force and bites into the outer surface of the fluid pipe, so that the movement in the circumferential direction of the fluid pipe can be prevented evenly.

The fluid pipe movement prevention means according to claim 5 of the present invention is the fluid pipe movement prevention means according to any one of claims 1 to 4, wherein the fluid pipe movement prevention means is provided between the inner surface of the recess and the locking portion. It is characterized in that an elastic body is interposed in a gap formed therebetween.
According to this feature, when the accessory part is assembled, the locking part is dropped from the recess by using the elastic force of the elastic body interposed in the gap between the inner surface of the recess and the locking part. Can be prevented.

  Examples of the present invention will be described below.

  An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a plan view showing an installation state of a fluid pipe in the embodiment of the present invention. FIG. 2A is a cross-sectional view showing a fluid pipe movement preventing means, and FIG. 2B is a side cross-sectional view similar to FIG. FIG. 3 is an enlarged cross-sectional view showing the installation state of the receiving stand. FIG. 4A is an enlarged view of the dotted line encircled portion of FIG. 2B, and FIGS. 4B, 4C, and 4D are enlarged views showing the tilting state of the locking member over time. is there. FIG. 5 (a) is a partial cross-sectional view showing the situation before installation of the cradle according to the first modification of the present invention, and (b) is a partial cross-sectional view showing the situation after installation as in (a). is there. FIG. 6 is an enlarged cross-sectional view showing the installation state of the cradle in the second modification of the present invention.

  As shown in FIG. 1, the water pipe as a fluid pipe in the present invention is an exposed pipe in the common groove, and is an inlet and an inlet in the water pipe 11 that is a straight pipe and the water pipe 2 that is a curved pipe. Are connected to each other in a watertight manner, and a joint body 15 is formed at each connection location, and a receiving base 14 described later is appropriately installed in the water pipe 11 or the like. A gas pipe 4 is installed adjacent to the fluid pipe.

  The fluid pipe of the present embodiment constitutes a water supply pipe, and the water flows down in the direction of the white arrow in the figure. Further, in the bent portion 3 or the straight portion of the water pipe 11 that bends along the pipe axis C of the water pipe 2, an external force that cannot be predicted due to the water pressure of the internal fluid of the fluid pipe, the dynamic pressure due to the water flow, or an earthquake acts. For example, there is a possibility that the connection between the receiving port and the insertion port is disconnected and the internal fluid leaks, or the fluid pipe moves and comes into contact with, for example, the adjacent gas pipe 4.

  As shown in FIGS. 2 (a) and 2 (b), the cradle 14 as an accessory part of this embodiment is a cradle that receives the weight of the water pipe 11 and is formed over the circumferential direction of the water pipe 11. In addition, it is installed along the outer peripheral surface of the straight portion of the water pipe 11, and is a divided structure composed of an upper part 14a and a lower part 14b that are provided so that their peripheral ends 14c, 14c can be assembled. Have Then, the upper part 14a and the lower part 14b are connected by bolt nuts 9 and 9 at the respective peripheral end parts 14c and 14c, and the bottom part of the lower part 14b is fixedly supported on the floor surface below the water pipe 11. The movement of the pipe axis C direction with respect to the water pipe 11 is prevented.

  Next, the fluid pipe movement preventing means according to the present invention is provided on the cradle 14 and has an engaging portion 20 that engages with the outer surface of the water pipe 11 and an opening along the circumferential direction toward the outer surface of the water pipe 11. It is mainly comprised from the recessed part 16 which accommodates the latching | locking part 20 in an inside.

  As shown in FIG. 2A, a plurality of recesses 16 (six in this embodiment) are configured along the inner peripheral surface of the receiving base 14 along the circumferential direction. In addition, the recesses 16 adjacent to each other are partitioned by a partition wall 14 d, and the locking portions 20 are fitted in the respective recesses 16. As for the latching | locking part 20, the 1st nail | claw 20a and the 2nd nail | claw 20b as a front-end | tip nail | claw formed in the circular arc shape substantially the same diameter as the outer diameter of the water pipe 11 are latching with the outer surface of the water pipe 11. Moreover, the latching | locking part 20 is a general purpose latching | locking part whose cross-sectional shape containing a pipe axis is substantially equal to the circumferential direction.

  Further, a rubber body 18 as an elastic body is interposed in a gap formed between the inner surface of the recess 16 and the locking portion 20, and the locking portion 20 is fitted in the recess 16.

  In this way, since the plurality of concave portions 16 are partitioned by the partition wall 14d, not only a structurally strong shape can be obtained, but the locking portions 20 are individually accommodated in the plurality of concave portions 16, respectively. Therefore, the plurality of locking portions 20 can be installed in an orderly manner, and the water pipe 11 can be locked in a stable state without being affected by the adjacent locking portions 20.

  In addition, about the quantity of a recessed part and a latching | locking part, it is not necessarily restricted to a present Example, What is necessary is just to be provided along the circumferential direction of a fluid pipe | tube.

  The inner surface of each recess 16 includes an inner bottom surface 16c facing the outer surface of the water pipe 11, and an inner surface 16b excluding the inner bottom surface 16c. The first claw 20a and the second claw 20b are connected to the outer surface of the water pipe 11. A bulging surface 16 d that bulges toward the outer surface of the water pipe 11 is formed on a part of the inner bottom surface 16 c so as to be evenly locked in the circumferential direction. Specifically, bulging surfaces 16d are formed mainly at the vicinity of the peripheral end portion 14c at both end portions in the circumferential direction of the respective recesses.

  Here, the inner bottom surface 16c of the recess 16 in the present embodiment is composed of the above-described bulging surface 16d and a non-bulging surface 16e excluding the bulging surface 16d, and the bulging surface 16d is a receiving base 14 described later. The distance from the outer surface of the water pipe 11 to the outer surface of the water pipe 11 in the assembled state of the cradle 14 is such that the tip claw of the locking part 20 bites into the outer surface of the water pipe 11 when assembled. It is assumed that the surface is shorter than the dimension in the direction (see FIG. 6).

  Next, the operation of the locking portion when the receiving base 14 is installed will be described.

  As described above, the bolts and nuts 9 and 9 are formed at the circumferential end portions 14c and 14c facing the upper part 14a and the lower part 14b in the state in which the locking parts 20 are accommodated in the recesses 16 formed in six places. And the upper part 14a and the lower part 14b are assembled to the outer surface of the water pipe 11.

  When the upper part 14a and the lower part 14b are assembled, the engaging part 20 is recessed by using the elastic force of the rubber body 18 interposed in the gap between the inner surface of the recessed part 16 and the engaging part 20. 16 can be prevented from falling off.

  By this assembling operation, the arc-shaped locking portion 20 provided in the circumferential direction is pressed by the inner bottom surface of the recess 16, and the first claw 20 a and the second claw 20 b are directed toward the outer surface of the water pipe 11. The pressing force generated in the locking portion 20 toward the outer surface of the water pipe 11 may be uneven in the circumferential direction.

As shown in FIG. 3, even when the pressing force generated in the locking portion 20 toward the outer surface of the water pipe 11 is uneven in the circumferential direction by assembling the peripheral end portions 14 c and 14 c, the locking is performed. Part 20 using bulged surface 16d as a reaction force, the first pawl 20a and the second pawl 20b at which the reaction force is applied bites into the outer circumferential surface of the water pipe 11. And since the latching | locking part 20 is divided into several and is arrange | positioned along the outer peripheral direction of a fluid pipe, the latching force by a latching part acts over the perimeter direction of the water pipe 11, As a result, the force for locking the water pipe 11 can be maintained evenly.

  Note that the peripheral end portion 14c of the upper part 14a and the peripheral end part 14c of the lower part 14b are spaced from each other by a predetermined distance when assembled, and are assembled by the bolt nut 9. By fixing and holding, the locking portion 20 maintains the state of locking the outer surface of the water pipe 11 using the bulging surface 16d as a reaction force.

  In particular, the pressing force is often insufficient in the vicinity of the peripheral end portions 14c and 14c, but as described above, the bulging surface 16d is formed on the inner bottom surface 16c of the recess 16 in the vicinity of the peripheral end portion 14c. Then, by assembling the peripheral end portions 14c, 14c, in the vicinity of the peripheral end portion 14c where the pressing force of the locking portion 20 toward the outer surface of the water pipe 11 is particularly insufficient, the first claw 20a and the second claw Since 20b uses the bulging surface 16d as a reaction force and bites into the outer surface of the water pipe 11, the movement can be prevented evenly in the circumferential direction of the water pipe 11.

  Further, the degree of bulging of the bulging surface 16 d gradually decreases toward the non-bulging surface 16 e of the inner bottom surface 16 c along the circumferential direction of the water pipe 11. By doing in this way, since it has shifted smoothly from the bulging surface 16d toward the non-bulging surface 16e, the first claw 20a and the second claw 20b of the locking portion 20 extend along the circumferential direction of the water pipe 11. It gradually bites into the outer surface of the water pipe 11 and becomes easy to be continuously locked along the circumferential direction.

  Further, since the bulging surface 16d is formed on the inner bottom surface 16c of the recess 16, the general shape of the locking portion 20 does not require a separate process, and the cross-sectional shape including the tube axis C is substantially equal to the circumferential direction. The locking part 20 can be used.

  Next, operation | movement of the latching | locking part 20 after installation of the receiving stand 14 is demonstrated below.

  As shown in FIG. 4 (a), the locking portion 20 extends as one end claw in one direction of the tube axis C (left direction in the drawing) and locks with the outer surface of the water pipe 11. And the 2nd nail | claw 20b extended toward the other direction (illustration right direction) of the pipe axis C and latching with the outer surface of the water pipe 11 is provided. The locking portion 20 is accommodated in the recess 16 so that the first claw 20a or the second claw 20b tilts and bites into the outer surface of the water pipe 11. The first claw 20a or the second claw 20b is not necessarily extended in one direction or the other direction of the tube axis C, but extends in the orthogonal direction toward the tube axis C. May be.

  Further, the first claw 20a and the second claw 20b are formed in a substantially symmetrical shape with an orthogonal plane D substantially orthogonal to the tube axis C as a center. By doing in this way, manufacture and attachment work of the latching | locking part 20 are easy.

  Next, the locking part 20 is pressed toward the outer surface of the water pipe 11 by the inner bottom surface 16c of the recess 16, and the first claw 20a and the second claw 20b of the locking part 20 are pressed by this pressing force. It bites into the outer surface of the water pipe 11 and prevents movement of the water pipe 11 in the direction of the tube axis C as will be described later. In addition, a gap K and a gap K ′ having a predetermined length are formed on both the left and right sides in the tube axis C direction of the recess 16 in which the locking part 20 is accommodated.

  The operation of the locking portion 20 will be described. At a position as shown in FIG. 4A, due to the water pressure in the water pipe 11 and the dynamic pressure due to the water flow, as shown in FIG. The pipe 11 moves in one direction of the pipe axis C (indicated by the white arrow in the figure), and the engaging portion 20 that has been engaged with the outer surface of the water pipe 11 moves in one direction of the pipe axis C (in the direction indicated by the white arrow in the figure). ) To the gap K. By this movement, the gap K described above is filled, and a gap K ″ is formed on the right side of the locking portion 20 in the figure.

  Next, as shown in FIG. 4 (c), the locking portion 20 moved in one direction of the tube axis C by the gap K contacts the tapered surface 16 a formed on a part of the inner surface 16 b of the recess 16. By contact, movement in the tube axis C direction is prevented.

  Further, as shown in FIGS. 4C and 4D, the water pipe 11 moves in the direction of the pipe axis C, and the second claw 20 b of the locking portion 20 tilts toward the outer surface of the water pipe 11. (See the black arrow in the figure). Thus, when the 2nd nail | claw 20b of the latching | locking part 20 latches to the water pipe 11, and the water pipe 11 is going to move relatively to the pipe axis C direction with respect to the receiving stand 14, the latching | locking part 20 is The second claw 20b bites into the outer surface of the water pipe 11 by using the inner bottom surface 16c and the inner side surface 16b of the recessed portion 16 accommodated as a reaction force, so that the water pipe 11 is connected to the receiving base 14 with respect to the tube axis C. Relative movement in both directions can be prevented.

  In particular, as shown in FIG. 4 (d), when the water pipe 11 is about to move relative to the receiving base 14 in the direction of the pipe axis C, the locking part 20 tilts in the recess 16. The reaction force is taken using the inner side surface 16b and the inner bottom surface 16c of the recess 16, and the second claw 20b is likely to bite into the outer surface of the water pipe 11, so that the movement of the water pipe 11 can be reliably prevented.

  The locking portion 20 is easily tilted by using the gap K having a predetermined length, and the first claw 20a and the second claw 20b easily bite into the outer surface of the water pipe 11, and further prevent the water pipe 11 from moving. Increases effectiveness.

  Although not shown in particular, even when the water pipe 11 moves in the other direction (right direction in the figure) opposite to the one direction (left direction in the figure) of the pipe axis C described above, the locking portion 20 is also described above. The water pipe 11 is prevented from moving in the direction of the pipe axis C. Moreover, the 1st nail | claw 20a tilts and it bites into the outer surface of the water pipe 11, and the water pipe 11 is latched.

  Since the first claw 20a and the second claw 20b are substantially symmetrical with respect to the orthogonal plane D, the same degree of movement prevention function can be exhibited in both directions along the tube axis C.

  Next, as shown in FIGS. 5 (a) and 5 (b), the receiving base 24 as an accessory part in the first modified example has a hinge part 24e on one side of the upper part 24a and the lower part 24b. The upper part 24a is pivotable in the circumferential direction with respect to the lower part 24b around the hinge part 24e, and is engaged with the peripheral end parts 24c, 24c on the other side. 9 and 9 have a divided structure that can be assembled.

  Further, a bulging surface 26 d that bulges toward the outer surface of the water pipe 11 is formed on a part of the inner bottom surface. Specifically, bulging surfaces 26d are formed mainly at the vicinity of the peripheral end portion 24c at both end portions in the circumferential direction of the respective recesses.

  As shown in FIG. 5 (b), in the case of this modification, by assembling the bolt nuts 9, 9 engaged at the other peripheral end portions 24c, 24c, in particular, In many cases, the pressing force is insufficient in the vicinity of the end portions 24c, 24c, but as described above, the bulging surface 26d is formed on the inner bottom surface of the recess 26 in the vicinity of the peripheral end portions 24c, 24c. By assembling the peripheral end portions 24c, 24c, the tip claw 20a exerts a reaction force on the bulging surface 26d in the vicinity of the peripheral end portion 24c where the pressing force of the locking portion 20 toward the outer surface of the water pipe 11 is particularly insufficient. Therefore, it is possible to prevent the water pipe 11 from moving evenly in the circumferential direction.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the above-described embodiment, the accessory part is the receiving base 14 that receives the pipe weight of the fluid pipe provided at a substantially central portion of the fluid pipe in the pipe axis direction. In addition, a concave portion may be formed on the inner peripheral surface of the joint body, and a locking portion may be appropriately installed in the concave portion.

  Moreover, in the said Example, although it consists of the bulging surface 16d formed in a part of the inner bottom face 16c of the recessed part 16, and the non-bulging surface 16e except the bulging surface 16d, a bulging surface is formed in a part of the inner bottom face of a recessed part. For example, as shown in FIG. 6 as a second modification of the present invention, the entire inner bottom surface of the recess may be formed on the bulging surface 16d ′ along the circumferential direction. Good.

  By doing in this way, the latching | locking part 20 which has the dimension a of a pipe radial direction is formed in the outer surface of the water pipe 11 by the bulging surface 16d 'which forms the separation dimension b to the outer surface of the water pipe 11 smaller than the dimension a. The first claw 20a and the second claw serving as the front end claw of the locking portion are eaten along the circumferential direction on the outer surface of the water pipe 11 by a dimension c as a difference between the dimension a and the separation dimension b. Will be included.

  Further, in the above-described embodiment, the bulging surfaces 16d are formed at both end portions in the circumferential direction of the inner bottom surface 16c in the same manner for all of the plurality of concave portions 16 configured along the circumferential direction. The bulging surface may be formed only in the concave portion in the vicinity, and the bulging surface may not be formed in the concave portion in the vicinity of the pipe top.

  In the above embodiment, the fluid inside the fluid pipe is a water supply, but it may be a sewer, and acts on the fluid pipe in the axial direction due to the water pressure in the pipe or the dynamic pressure due to the water flow. If so, the fluid pipe movement prevention means of the present invention can be applied in addition to the bent portion in the present embodiment.

  Further, in the above embodiment, the accessory part is a pipe buried in the ground and installed at the connection part of the water pipe in the vicinity of the bent part 3, but the installation part of the accessory part is a fluid pipe. It may be a location where it is necessary to prevent this movement, and for example, it may be a straight portion of the exposed pipe in the common groove.

  Further, in the above embodiment, the locking portion 20 has a first claw 20a that extends in one direction of the tube axis C and a second claw 20b that extends in the other direction of the tube axis C. However, the movement of the fluid pipe in both directions of the pipe shaft is prevented, but the tip claw is not necessarily limited to the above-described embodiment as long as it is locked to the outer surface of the fluid pipe. The movement of the fluid pipe in only the direction may be prevented.

  Further, in the above-described embodiment, a plurality of locking portions having the same shape of the front end claw are provided along the circumferential direction of the fluid pipe, but the specification of the front end claw extending toward the outer surface of the fluid pipe is used. You may change along the circumferential direction, and you may change the shape and specification of the back side in a latching | locking part along a circumferential direction corresponding to a bulging surface or a non-bulging surface.

It is a top view which shows the installation condition of the fluid pipe | tube in the Example of this invention. (A) is sectional drawing which shows the movement prevention means of a fluid pipe | tube, (b) is side sectional drawing similarly to (a). It is an expanded sectional view which shows the installation condition of a receiving stand. (A) is an enlarged view of the dotted line encircled part of FIG. 2 (b), (b), (c), (d) is an enlarged view showing the tilting state of the locking member over time. (A) is a partial cross section figure which shows the condition before installation of the stand in the 1st modification of this invention, (b) is a partial cross section figure which shows the condition after installation similarly to (a). These are expanded sectional views which show the installation condition of the receiving stand in the 2nd modification of this invention.

Explanation of symbols

2 Water pipe (fluid pipe)
3 Bent part 4 Gas pipe 9 Bolt nut 11 Water pipe (fluid pipe)
14 Supporting stand (accessory part)
14a Upper part 14b Lower part 14c Peripheral end part 14d Partition wall 15 Joint body 16 Recess 16a Tapered surface 16b Inner side surface 16c Inner bottom surface 16d Swelling surface 16e Non-swelling surface 18 Rubber body (elastic body)
20 Locking portion 20a First claw (tip claw)
20b 2nd claw (tip claw)
24 cradle (accessory parts)
24a Upper part 24b Lower part 24c Peripheral end part 24e Hinge part 26d Swelling surface C Pipe axis D Orthogonal surface K Gap

Claims (5)

The movement of the fluid pipe which is provided in an accessory part which has a divided structure which is formed over the circumferential direction of the fluid pipe and which can be assembled with each other's peripheral ends, to prevent the movement of the fluid pipe in the pipe axis direction. Prevention means,
And the locking portion having a distal end claw for locking along the outer peripheral surface in the circumferential direction of the fluid pipe, inside an open along the circumferential direction the locking portion toward the outer circumferential surface of said fluid tube A recess for accommodating,
The concave portion that accommodates the locking portion is divided into a plurality along the outer peripheral direction of the fluid pipe , and the tip claw is attached by assembling the peripheral end portion of the accessory having the divided structure. to evenly engage the outer peripheral surface in the circumferential direction of said fluid conduit, at least a portion of the inner bottom surface of the recess, bulging surface which bulges toward an outer circumferential surface of said fluid tube is formed Means for preventing movement of a fluid pipe. The bulging surface, the movement of the fluid conduit according to claim 1, characterized in that swelling degree toward the non-bulged surface of the inner bottom surface of the recess along the outer circumferential direction of the fluid pipe is gradually reduced Prevention measures. 3. The fluid pipe movement preventing means according to claim 1, wherein the concave portion that accommodates the locking portion is partitioned by a partition wall. 4. The fluid pipe movement prevention according to claim 1, wherein the bulging surface is formed on an inner bottom surface of the concave portion in the vicinity of a peripheral end portion of the accessory having the divided structure. 5. means.   The fluid pipe movement preventing means according to any one of claims 1 to 4, wherein an elastic body is interposed in a gap formed between an inner surface of the recess and the locking portion.

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