JP2012036917A - Movement preventing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movement preventing device capable of preventing relative movement of a spigot pipe relative to a socket pipe, even though the spigot pipe relatively moves to the socket pipe in any direction of a separating direction and an inserting direction to the socket pipe of the spigot pipe.SOLUTION: In the movement preventing device 4 for preventing the relative movement in the separating direction and the inserting connection of the spigot part and the socket 2a by locking the locking pawl 5a to the outer peripheral surface 1c of the spigot part 1a, the locking pawl 5a is arranged only in the center of the spigot pipe 1 in the pipe axis C direction in the locking part 5, the pushing/pressing part 7 pushes and presses the center of the locking pawl 5 in the peripheral direction and the center of the spigot pipe 1 in the pipe axis C direction toward the pipe axis C.

Description

  The present invention relates to a movement preventing means that prevents a relative movement in the direction of detachment and insertion of the insertion port and the receiving port by locking a locking claw on the outer peripheral surface of the insertion port.

  In the conventional movement preventing means, a plurality of concave portions extending in an arc shape in the circumferential direction are formed on the inner peripheral surface of the main body facing the outer peripheral surface of the insertion portion, and the concave portions are directed toward the outer peripheral surface of the insertion portion in these concave portions. The locking claw extends at an acute angle, and the locking claw is bitten into the outer peripheral surface of the insertion portion by a push screw (pressing screw), so that the insertion portion tends to be separated from the receiving portion. Relative movement in the separating direction causes the locking portion to tilt in the recess, and this tilting causes the locking claw to bite into the outer peripheral surface of the insertion portion, thereby moving the insertion portion in the direction away from the receiving portion. (For example, refer to Patent Document 1).

JP 2009-174654 A (6th page, FIG. 5)

  However, in the movement preventing means described in Patent Document 1, the locking claw is formed on the right side of the locking portion in the figure (the insertion direction side of the insertion portion into the receiving portion when arranged in the recess). Therefore, when the insertion portion moves relative to the receiving portion in the insertion direction, the locking portion tilts in the opposite direction to the case where the insertion portion moves relative to the receiving portion in the separation direction, There exists a problem that a latching claw will slip out from the outer peripheral surface of an insertion part.

  The present invention has been made paying attention to such problems, and even if the insertion tube moves relative to the reception tube in either the direction of detachment of the insertion tube from the reception tube or the insertion direction. Another object of the present invention is to provide a movement preventing means capable of preventing relative movement of the insertion tube with respect to the receiving tube.

In order to solve the above problem, the movement preventing means of the present invention comprises:
A plurality of latches arranged along the circumferential direction of the insertion portion of the insertion tube and having locking claws formed on the outer circumferential surface of the insertion portion that are engaged with the outer circumferential surface of the insertion portion. And the opening portion of the receiving tube into which the insertion portion is inserted or the cover portion supported by the reception portion, and is open toward the outer peripheral surface of the insertion portion and is locked. A recess that houses the portion therein, and a pressing portion that presses the locking portion in the recess toward the outer peripheral surface of the insertion portion, and the locking is performed on the outer peripheral surface of the insertion portion. A movement preventing means for preventing relative movement in the detaching direction and the inserting direction of the insertion port and the receiving port by locking a claw,
The locking claw is provided only in a central portion in the tube axis direction of the insertion tube in the locking portion, and the pressing portion is a central portion in the circumferential direction of the locking claw, and the insertion port The center part of the pipe axis direction of the pipe is pressed toward the pipe axis.
According to this feature, when the insertion tube moves relative to the receiving tube in the tube axis direction, the locking portion has a pressing portion in both the separation direction and the insertion direction of the insertion tube with respect to the receiving tube. The outer peripheral surface of the insertion portion is provided with a locking force that the locking claw applies to the outer peripheral surface of the insertion portion while rotating in the relative movement direction of the insertion tube with the contact portion of the insertion portion as a rotation center. Can be locked to the outer peripheral surface of the insertion port while being dispersed in the circumferential direction of the tube, so that not only the insertion tube can be pulled out from the reception tube, but also the insertion tube can be prevented from being excessively inserted into the reception tube. In addition, the influence of the locking claw on the inner peripheral surface of the insertion tube can be reduced by moving the insertion tube relative to the reception tube in the tube axis direction.

The movement preventing means of the present invention includes
Both end portions in the circumferential direction of the recess are formed longer in the tube axis direction than the central portion in the circumferential direction of the recess.
According to this feature, the both ends of the engaging portion on the circumferential side of the engaging portion are moved from the central portion on the circumferential side of the engaging portion, which is generated when the inserting tube moves in the removal direction or the inserting direction with respect to the receiving tube. In addition, a large rotation width in the direction of detachment of the insertion port or in the insertion direction can be allowed at both ends of the recess in the circumferential direction.

The movement preventing means of the present invention includes
The locking claw of at least one of the locking portions locks the outer peripheral surface of the insertion portion at a position shifted from the locking claw of the other locking portion in the tube axis direction. It is said.
According to this feature, since the plurality of locking claws are not arranged on the same straight line over the entire circumference of the outer peripheral surface of the insertion portion, the locking force received from the locking claws is not increased in the insertion tube. The influence on the peripheral surface can be further reduced.

The movement preventing means of the present invention includes
The circumferential ends of the locking claw of the one locking portion and the locking claw of the other locking portion overlap in the circumferential direction to lock the outer peripheral surface of the insertion portion. It is characterized by being.
According to this feature, the latching claw of one latching portion and the latching pawl of the other latching portion overlap to increase the latching force at the location where the outer peripheral surface of the insertion portion is latched, and more Relative movement of the insertion portion and the receiving portion in the separation direction and insertion direction can be strongly prevented.

It is a partially broken sectional view showing an insertion tube and a receiving tube in Example 1. It is AA sectional drawing in FIG. It is a top view which shows the internal peripheral surface of a cover part. (A) is a front view which shows a latching | locking part, (b) is a top view which shows the arrangement position of the latching claw in a latching | locking part, (c) is a latching in FIG. 4 (a). It is BB sectional drawing of a part, (d) is CC sectional drawing of the latching | locking part in Fig.4 (a). (A) is sectional drawing which shows the state in which the latching | locking part is pressed toward the outer peripheral surface of the insertion part by the press volt | bolt, (b) is the insertion pipe moving to a detachment | leave direction from a receiving pipe. It is sectional drawing which shows the latching | locking part at the time of doing, (c) is sectional drawing which shows the latching | locking part when an insertion tube moves to the insertion direction of a receiving tube. 6 is a cross-sectional view of a cover part in Embodiment 2. FIG. 6 is a plan view showing an inner peripheral surface of a cover portion in Embodiment 2. FIG. It is a top view which shows arrangement | positioning of the latching claw in Example 2. FIG. It is sectional drawing which shows the insertion part and receiving part as a modification.

  The form for implementing the movement prevention means based on this invention is demonstrated below based on an Example.

  The movement preventing means according to the first embodiment will be described with reference to FIGS. In the following description, the left side of FIG. 1 and the front side of FIG. 2 will be referred to as the insertion tube detachment direction, and the front side of FIG. As shown in FIG. 1, the insertion tube 1 and the receiving tube 2 in the present embodiment are, for example, fluid pipes for waterworks buried in the ground, and the tube tube C direction side of the receiving tube 2 The end portion of the insertion tube 1 is formed in the receiving portion 2a having a diameter larger than that of the other receiving tube 2, and the end portion on the tube axis C direction side of the insertion tube 1 is inserted into the receiving portion 2a. It is formed in the possible insertion part 1a. The inner peripheral surfaces of the insertion tube 1 and the receiving tube 2 are coated with mortar or a rust-proofing paint as a rust prevention treatment for preventing rust from the fluid flowing in the insertion tube 1 and the receiving tube 2. Layer 10 is formed.

  The seal member 3 is attached to the inner peripheral surface of the receiving portion 2a in a watertight manner in the circumferential direction. By inserting the insertion portion 1a into the receiving portion 2a, the seal member 3 is The space between the insertion portion 1a and the receiving portion 2a is closed in a water-tight manner by being in watertight contact with the outer peripheral surface of the insertion portion 1a. In addition, a part of the outer peripheral surface is formed at the distal end of the receiving portion 2a as a bulging portion 2b that bulges in the radial direction side of the receiving portion 2a along the circumferential direction. The distal end portion 1b of the insertion portion 1a inserted into the receiving portion 2a is separated from the back end surface 2c formed inside the receiving portion 2a by a predetermined length R in the tube axis C direction. Has been placed.

  Between the insertion tube 1 and the receiving tube 2 connected in this way, the movement preventing means 4 of the present invention covering the insertion portion 1a and the receiving portion 2a is attached. As shown in FIGS. 1 and 2, the movement preventing means 4 has divided cover portions 4a and 4b. These cover portions 4a and 4b are formed in a substantially semicircular shape having an annular shape by tightening flanges 4c and 4c formed at both end portions on the circumferential side with bolt nuts 4d and 4d. Hereinafter, only the cover part 4a is demonstrated about these cover parts 4a and 4b about the same structure.

  As shown in FIGS. 1 and 2, a recess 4e for accommodating and disposing a locking portion 5 described later along the circumferential direction of the cover portion 4a is formed on the inner peripheral surface of the cover portion 4a. A plurality (three in this embodiment) are opened toward the outer peripheral surface 1c. These recesses 4e are all formed in the same position in the tube axis C direction (see FIG. 3).

  The adjacent recesses 4e and 4e are partitioned by a partition wall 4f provided at a predetermined interval in the circumferential direction. A rubber body 6 is attached to the partition walls 4f over the adjacent recesses 4e, 4e.

  Furthermore, screw holes 4g facing the radial direction of the movement preventing means 4 are formed in the center part in the circumferential direction and the center part in the tube axis C direction of each recess 4e, and in these screw holes 4g, a cover part is formed. A pressing bolt 7 as a pressing portion in the present invention is screwed from the outside of 4a. In addition, as shown in FIG. 3, each recessed part 4e opens so that the opening width dimension by the side of the pipe axis C may become long in the pipe axis C direction gradually toward the diameter reduction direction of the movement prevention means 4. As shown in FIG. Yes. In particular, the opening width dimension on the tube axis C direction side at both circumferential end portions of each recess 4e is longer in the tube axis C direction than the opening width dimension on the tube axis C direction side at the circumferential center portion of each recess 4e. It is formed in the size.

  Further, from the end portion of the cover portion 4a facing the receiving portion 2a side, a protruding portion 4j whose tip protrudes in the tube axis C direction toward the insertion direction of the insertion tube 1 into the receiving tube 2 is provided. It is formed in the collar part 4h which has. For this reason, when the cover portions 4a and 4b are tightened with the bolt nut 4d, the protrusion 4j is arranged on the insertion direction side of the insertion tube 1 into the receiving tube 2 rather than the bulging portion 2b. The portion 2b is disposed so as to be able to contact the cover portions 4a and 4b and the protrusion 4j. In other words, the movement preventing means 4 is supported by the receiving portion 2a because the bulging portion 2b cannot be detached between the cover portions 4a and 4b and the protrusion 4j.

  Next, the locking part 5 will be described. As shown in FIGS. 4 (a), 4 (b), 4 (c) and 4 (d), the locking portion 5 is housed in each recess 4e of the movement preventing means 4, and the insertion portion It is a member for preventing relative movement in the detaching direction and inserting direction of the insertion port 1a and the receiving port 2a by being locked to the outer peripheral surface 1c of 1a. The locking portion 5 is formed in a substantially arc shape that is a part of a circle having a shorter diameter than the insertion tube 1. The locking portion 5 has a central portion in the tube axis C direction on the inner peripheral side of the locking portion 5. The latching claw 5a for latching to the outer peripheral surface 1c of the insertion part 1a is formed over substantially the entire circumference of the latching part 5 in the circumferential direction.

  That is, the locking portion 5 is formed in a substantially arc shape having a curvature slightly larger than the curvature of the outer peripheral surface 1c of the insertion portion 1a in a front view, and the circular arc center of the locking portion 5 is formed in the insertion tube 1. By disposing it slightly shifted from the center (tube axis C) to the locking portion 5 side, the locking claw 5a is relatively shallow in the circumferential direction so as to be locked to the outer peripheral surface 1c of the insertion portion 1a. It has become.

  In addition, a contact portion 5b is formed at the center portion in the circumferential direction at the outer peripheral side end portion of the locking portion 5 to contact the tip end portion of the pressing bolt 7 and transmit a reaction force to the locking claw 5a. . The contact portion 5b has a curved surface 5c having a relatively small curvature toward the circumferential direction of the locking portion 5, and a receiving tube of the insertion tube 1 that is in the tube axis C direction from the locking portion 5. 2 is formed so as to protrude in the insertion direction and the separation direction. In addition, as shown in FIG. 4A and FIG. 4D, the portions other than the central portion in the circumferential direction at the outer peripheral side end portion of the locking portion 5 have a substantially curved shape in a side view of the locking portion 5. Is formed. Furthermore, the curved surface 5c in the present embodiment is formed with the same curvature as the locking portion 5 toward the circumferential direction of the locking portion 5, but the curved surface 5c is directed toward the circumferential direction of the locking portion 5 of the curved surface 5c. The curvature may be different from the curvature in the circumferential direction of the locking portion 5 or may be a flat surface having no curvature.

  Further, groove portions 5d for accommodating a part of the rubber body 6 when the engaging portion 5 is accommodated in the recess 4e are formed on both end faces on the circumferential side of the engaging portion 5. For this reason, as shown in FIG. 2, a portion of the rubber body 6 is elastically accommodated in the groove 5d by housing the locking portion 5 in each recess 4e with the rubber body 6 attached to each partition wall 4f. Arranged while deforming. Each rubber body 6 comes into contact with the engaging portions 5 and 5 adjacent to each other in the circumferential direction while being elastically deformed, so that each engaging portion 5 falls out of the recess 4e by using this elastic force. To prevent this.

  At this time, each locking portion 5 is housed in the recess 4e, so that the curved surface 5c of the contact portion 5b is disposed opposite to the screw hole 4g, and the tip of the pressing bolt 7 extends over substantially the entire surface. The curved surface 5c comes into contact with the central portion in the tube axis C direction. That is, the front end of the pressing bolt 7 abuts on the central portion in the circumferential direction of the locking portion 5 and the central portion in the tube axis C direction.

  Furthermore, since the recesses 4e are all formed at the same position in the direction of the tube axis C, the locking portions 5 are accommodated in the respective recesses 4e, so that all the locking claws 5a are the same. Arranged on the circumferential surface.

  The movement preventing means 4 configured as described above and having the locking portions 5 accommodated in the respective recesses 4e is provided with the flanges 4c of the cover portions 4a and 4b as shown in FIGS. , 4c are tightened with bolt nuts 4d, 4d, and then each pressing bolt 7 is screwed to press the locking portion 5 toward the outer peripheral surface 1c of the insertion portion 1a, and the locking claw 5a is inserted into the insertion portion. It locks perpendicularly to the outer peripheral surface 1c of 1a.

  As described above, the locking portion 5 has a curvature slightly larger than the curvature of the outer peripheral surface 1c of the insertion portion 1a in a front view, so that both end portions in the circumferential direction of the locking claw 5a are It engages with the outer peripheral surface 1c of the insertion port 1a deeper than the central portion in the circumferential direction.

  From the state in which the locking claw 5a shown in FIG. 5 (a) is locked vertically to the outer peripheral surface 1c of the insertion portion 1a, the insertion tube 1 and the reception tube 2 are not affected by an external force such as an earthquake or fluid. The tilting of the locking portion 5 when attempting to move relative to the insertion portion 1a and the receiving portion 2a in the direction of the tube axis C due to an average force or the like will be described.

  As shown in FIG. 5 (b), when the insertion tube 1 relatively moves in the direction of detachment from the receiving tube 2, first, although not particularly shown, the movement preventing means 4 is provided with a locking claw 5a. Is moved relative to the detaching direction together with the insertion portion 1a while being vertically locked to the outer peripheral surface 1c of the insertion portion 1a.

  When the bulging portion 2b abuts against the protrusion 4j (see FIG. 1) and the relative movement of the movement preventing means 4 in the detaching direction is restricted, as shown in FIG. The stop portion 5 starts to tilt clockwise with the center point 8 at the end portion of the contact portion 5b in contact with the tip end portion of the pressing bolt 7 in the direction of separation. By this tilting of the locking portion 5, the locking claw 5a is locked deeper toward the outer peripheral surface 1c of the insertion portion 1a, and the relative movement of the insertion tube 1 in the direction of detachment from the receiving tube 2 is prevented. Is done.

  Further, as shown in FIG. 5C, when the insertion tube 1 relatively moves in the insertion direction of the reception tube 2, first, although not particularly illustrated, the movement preventing means includes a locking claw 5a. Is relatively moved in the insertion direction together with the insertion portion 1a together with the insertion portion 1a while being engaged with the outer peripheral surface 1c of the insertion portion 1a.

  When the bulging portion 2b abuts against the inner side surface 4k of the cover portions 4a and 4b (see FIG. 1), when the relative movement in the insertion direction of the movement preventing means 4 is restricted, FIG. As shown in FIG. 3, the locking portion 5 starts to tilt counterclockwise with the end portion in the insertion direction of the insertion portion 1a of the contact portion 5b in contact with the tip of the pressing bolt 7 as the center point 9. To do. By this tilting of the locking portion 5, the locking claw 5 a is deeply locked toward the outer peripheral surface 1 c of the insertion portion 1 a, and relative movement of the insertion tube 1 in the insertion direction of the receiving tube 2 is prevented. The

  In particular, when the insertion tube 1 moves relative to the insertion direction of the receiving tube 2, the relative movement is prevented before the insertion tube 1 moves relative to the insertion direction of the reception tube 2 by a distance R. By this, it can prevent that the front-end | tip part 1b of the insertion part 1a and the back end surface 2c in the receiving part 2a collide, and the insertion part 1a and the receiving part 2a will be damaged.

  As described above, in the movement preventing means 4 according to the first embodiment, the locking claw 5a is provided only at the central portion of the locking portion 5 in the tube axis C direction of the insertion tube 1 and the pressing bolt 7. Presses the central portion of the locking claw 5a in the circumferential direction and the central portion of the insertion tube 1 in the tube axis C direction toward the tube axis C, so that the insertion tube 1 is pressed against the receiving tube 2. By relatively moving in the direction of the tube axis C, the locking portion 5 has the contact portions with the pressing bolts 7 as the center points 8 and 9 in both the direction of detachment of the insertion tube 1 from the receiving tube 2 and the insertion direction. While rotating in the relative movement direction of the insertion tube 1, the engagement force that the engagement claw 5 a applies to the outer peripheral surface 1 c of the insertion portion 1 a is applied to the periphery of the outer peripheral surface 1 c of the insertion portion 1 a. Since it can be locked to the outer peripheral surface 1c of the insertion portion 1a while being dispersed in the direction, not only the insertion tube 1 is pulled out from the receiving tube 2 but also the insertion tube 1 The insertion tube 1 can be prevented from being excessively inserted into the mouth tube 2, and the locking claw 5 a is moved relative to the receiving tube 2 in the direction of the tube axis C so that the locking claw 5 a can be Can be kept small.

  In addition, since both end portions in the circumferential direction of the recess 4e are formed to be longer in the tube axis C direction than the central portion in the circumferential direction of the recess 4e, the insertion tube 1 is detached from the receiving tube 2 Alternatively, the rotation of the insertion portion 1a in the disengagement direction or the insertion direction is larger than the center portion of the engagement portion 5 on the circumferential side at both ends on the circumferential direction side of the engagement portion 5 caused by moving in the insertion direction. The width can be allowed at both ends on the circumferential side of the recess 4e.

  Next, the movement preventing means according to the second embodiment will be described with reference to FIGS. In addition, the same structure as the said Example is abbreviate | omitted. Hereinafter, the front side of the sheet of FIG.

  As shown in FIG. 6, the locking portion 5 ′ in the present embodiment is such that both end portions on the circumferential side are directed outward in the circumferential direction of the locking portion 5 from the outer peripheral side end portion toward the inner peripheral side. It is formed in the taper part 5e which makes an inclination. For this reason, the locking claw 5a formed at the substantially central portion in the tube axis C direction on the inner peripheral side of the locking portion 5 is formed longer in the circumferential direction of the locking portion than in the first embodiment. Moreover, as shown in FIG. 7, the recessed part 4e in a present Example is formed so that it may slip | deviate to the pipe-axis C direction between the recessed parts 4e and 4e adjacent on the inner peripheral surface of cover part 4a, 4b.

  For this reason, when the locking portions 5 'are stored in the respective recesses 4e, the locking claws 5a are alternately arranged as shown in FIG. Further, in a state where the locking portions 5 are housed in the respective recesses 4e, as shown in FIGS. 6 and 8, the adjacent locking portions 5 are arranged such that the end portions on the circumferential side of the locking claws 5a are in the circumferential direction. Are placed in duplicate. That is, in the movement preventing means 4 in the present embodiment, the locking claws 5a of the adjacent locking portions 5 overlap in the circumferential direction and lock the same portion of the outer peripheral surface 1c of the insertion portion 1a. ing.

  In this embodiment, the recesses 4e and 4e adjacent to each other on the inner peripheral surfaces of the cover portions 4a and 4b are formed so as to be displaced in the tube axis C direction, but all the recesses 4e are located at the same position in the tube axis C direction. Otherwise, the number of recesses 4e formed on the inner peripheral surfaces of the cover portions 4a and 4b while being shifted in the tube axis C direction is not particularly limited.

  As described above, in the movement preventing means 4 according to the second embodiment, the locking claw 5a of at least one locking portion 5 is shifted from the locking claw 5a of the other locking portion 5 in the direction of the tube axis C. Since the outer peripheral surface 1c of the insertion port 1a is locked at the position, the plurality of locking claws 5a are not arranged on the same straight line over the entire circumference of the outer peripheral surface 1c of the insertion port 1a. The influence of the locking force received from the locking claw 5a on the inner peripheral surface of the insertion tube 1 can be further reduced.

  Moreover, the edge parts of the circumferential direction of the latching claw 5a of one latching | locking part 5 and the latching claw 5a of the other latching part 5 overlap in the circumferential direction, and the outer peripheral surface 1c of the insertion part 1a is overlapped. Since it is locked, the locking claw 5a of one locking part 5 and the locking claw 5a of the other locking part 5 overlap each other at the place where the outer peripheral surface 1c of the insertion part 1a is locked. The stopping force can be increased, and the relative movement in the separation direction and the insertion direction between the insertion port 1a and the receiving port 2a can be more strongly prevented.

  As described above, the first and second embodiments of the present invention have been described with reference to the drawings. However, the specific configuration is not limited to these embodiments, and even if there are changes or additions without departing from the gist of the present invention. Included in the invention.

  For example, in the above-described embodiment, the receiving portion 2a and the movement preventing means 4 are configured as separate bodies, and the cover portions 4a and 4b are fastened by the flanges 4c and 4c so that the bulge portion 2b is connected to the cover portions 4a and 4b. The movement preventing means 4 is supported by the receiving portion 2a so that it can be separated from the protrusion 4j. However, as a modification of the present invention, as shown in FIG. 9, it faces the outer peripheral surface 1c of the insertion portion 1a. Receiving the movement preventing means 4 ′ provided with a recess 4e that opens, a locking portion housed in the recess 4e, and a pressing bolt 7 that presses the locking portion 5 toward the outer peripheral surface 1c of the insertion portion 1a. You may provide integrally in the front-end | tip part of the opening part 2a. As described above, the movement preventing means 4 and the receiving portion 2a are integrally formed, so that the engaging claw 5a is immediately after the insertion tube 1 and the receiving tube 2 are relatively moved in the detaching direction and the inserting direction. Can be deeply locked to the outer peripheral surface 1c of the insertion portion 1a to prevent the insertion tube 1 and the receiving tube 2 from moving away from each other and in the insertion direction.

  In the above embodiment, the cover portions 4a and 4b are fastened with the flanges 4c and 4c so that the bulging portion 2b can be detached between the cover portions 4a and 4b and the projection 4j, and the movement preventing means 4 is received. Although it was supported by the mouth portion 2a, instead of the above embodiment, although not particularly illustrated, the inner peripheral surface at the distal end portion of the mouth portion 2a has a tapered surface that gradually decreases in diameter toward the insertion direction of the mouth tube 1. A seal member made of a rubber material or the like is disposed between the tapered surface and the outer peripheral surface 1c of the receiving port portion 1a, and the movement preventing means is screwed toward the receiving port portion to form a seal. You may comprise as a press ring for pressing a member toward an insertion direction and sealing between the taper surface and the outer peripheral surface 1c watertightly.

  Moreover, although the said Example demonstrated the example which inserts the insertion part 1a of the insertion tube 1 in the reception part 2a formed in the edge part of the one side of the pipe axis C direction of the reception tube 2, It is good also as the edge part of the both sides of the pipe axis C direction of the mouth pipe 2 being comprised as a receiving part, and enabling the insertion part 1a to be inserted in both receiving parts. In this case, a movement preventing means is provided at both receiving ports.

  Moreover, in the said Example, although the insertion pipe 1 and the receiving pipe 2 were demonstrated as a fluid pipe for waterworks, the fluid which flows through the insertion pipe 1 and the receiving pipe 2 is not only water but oil, etc. A liquid other than water may be used, or a mixture of liquid and gas may be used.

  Moreover, in the said Example, although the latching claw 5a was latched by the outer peripheral surface 1b by pressing the latching | locking part 5 toward the outer peripheral surface 1b of the insertion part 1a with the press volt | bolt 7, the insertion tube 1 If the tube diameter is sufficiently short, the curved surface of the abutting portion is brought into contact with the outer peripheral side end surface of the recess without forming a screw hole in the movement preventing means, and the flanges are tightened with bolts and nuts. The locking claws may be locked to the outer peripheral surface by each cover portion pressing the locking portion directly toward the outer peripheral surface of the insertion portion by force.

  Moreover, in the said Example, the contact part 5b which is the center part of the circumferential direction in the outer peripheral side edge part of the latching | locking part 5 and the center part of the tube part C direction of the insertion part 1a is made into the insertion part by the press volt | bolt 7. The locking claw 5a is locked to the outer peripheral surface 1c by pressing it toward the outer peripheral surface 1c of 1a, but the locking portion 5 is inserted into the insertion portion by a separate bolt together with the pressing bolt 7 that presses the contact portion 5b. You may make it press toward the outer peripheral surface 1c of 1a. In this case, along the circumferential direction of the locking portion 5 around the pressing bolt 7 that presses the abutting portion 5b so that the locking claw 5a is not biased and locked to the outer peripheral surface 1c of the insertion portion 1a. It is desirable to arrange a plurality of bolts at equal intervals.

DESCRIPTION OF SYMBOLS 1 Insertion tube 1a Insertion part 1c Outer peripheral surface 2 Reception pipe 2a Reception part 4, 4 'Movement prevention means 4a, 4b Cover part 4e Recessed part 5, 5' Locking part 5a Locking claw 5b Contact part 7 Press Bolt (pressing part)
8,9 Center point

Claims (4)

A plurality of latches arranged along the circumferential direction of the insertion portion of the insertion tube and having locking claws formed on the outer circumferential surface of the insertion portion that are engaged with the outer circumferential surface of the insertion portion. And the opening portion of the receiving tube into which the insertion portion is inserted or the cover portion supported by the reception portion, and is open toward the outer peripheral surface of the insertion portion and is locked. A recess that houses the portion therein, and a pressing portion that presses the locking portion in the recess toward the outer peripheral surface of the insertion portion, and the locking is performed on the outer peripheral surface of the insertion portion. A movement preventing means for preventing relative movement in the detaching direction and the inserting direction of the insertion port and the receiving port by locking a claw,
The locking claw is provided only in a central portion in the tube axis direction of the insertion tube in the locking portion, and the pressing portion is a central portion in the circumferential direction of the locking claw, and the insertion port A movement preventing means for pressing a central portion of the tube in the tube axis direction toward the tube shaft.   The movement preventing means according to claim 1, wherein both end portions in the circumferential direction of the recess are formed longer in the tube axis direction than a central portion in the circumferential direction of the recess.   The locking claw of at least one of the locking portions locks the outer peripheral surface of the insertion portion at a position shifted from the locking claw of the other locking portion in the tube axis direction. The movement preventing means according to claim 1 or 2.   The circumferential ends of the locking claw of the one locking portion and the locking claw of the other locking portion overlap in the circumferential direction to lock the outer peripheral surface of the insertion portion. The movement preventing means according to claim 3, wherein the movement preventing means is provided.

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