JP6590229B2 - Pipe joint - Google Patents

Description

  The present disclosure relates to a pipe joint for connecting a single pipe and a single pipe.

  Conventionally, a pipe joint for connecting a single pipe and a single pipe has been proposed (for example, Patent Document 1).

  The pipe joint of Patent Document 1 presses the end of a single tube inserted into the connecting portion into a cylindrical connecting portion formed in a cylindrical shape having an inner diameter slightly larger than the outer shape of the connecting single tube against the inner surface of the connecting portion. And a bolt for fixing. With such a configuration, the single pipe and the single pipe are fixedly connected.

JP-A-6-337010

  On the other hand, in the scaffolding, safety and workability of work performed using a single pipe are regarded as important. Also when connecting a single pipe and a single pipe using a pipe joint as mentioned above, development of the technique which can improve the safety | security regarding a connection work and workability | operativity is desired.

  Accordingly, an object of the present disclosure is to provide a pipe joint that can improve safety and workability.

  In order to achieve the above object, the present disclosure is configured as follows.

  According to one aspect of the present disclosure, a first pipe that is a pipe joint for connecting a single pipe and a single pipe and that has a mechanism that can be connected by rotating the single pipe in the circumferential direction at one end. A cylindrical member, a second cylindrical member rotatably fitted to the first cylindrical member so as to surround the outer peripheral surface of the other end of the first cylindrical member, and a single tube in the circumferential direction A mechanism that can be rotated and connected is provided at one end, and the other end is inserted from the opposite side of the second cylindrical member to the side that fits the first cylindrical member. The first cylindrical member and the second cylindrical member at the overlapping portion of the third cylindrical member and the first cylindrical member and the second cylindrical member that rotate integrally with the second cylindrical member. A first fixing mechanism for releasably fixing the first tube and a second fixing mechanism for releasably fixing the single tube connected to the third cylindrical member to the third cylindrical member It comprises, providing a pipe joint.

  According to the pipe joint of the present disclosure, safety and workability can be improved.

The perspective view of the pipe joint of embodiment Exploded view of the pipe joint of the embodiment The perspective view of the plate member of the pipe joint of embodiment The enlarged side view of the 1st cylindrical member of the pipe joint of an embodiment

  According to the first aspect of the present disclosure, there is provided a pipe joint for connecting a single pipe and a single pipe, the first joint having a mechanism capable of being connected by rotating the single pipe in the circumferential direction at the one end. A cylindrical member, a second cylindrical member that is rotatably fitted to the first cylindrical member so as to surround the outer peripheral surface of the other end of the first cylindrical member, and a single tube in the circumferential direction A mechanism that can be connected to the first cylindrical member, and the other end is inserted from the opposite side of the second cylindrical member that is fitted to the first cylindrical member. In the overlapping part of the 3rd cylindrical member and the 1st cylindrical member and the 2nd cylindrical member which rotate integrally with the 2nd cylindrical member, the 1st cylindrical member and the 2nd cylindrical shape A first fixing mechanism for releasably fixing the members to each other; and a second fixing machine for releasably fixing the single pipe connected to the third cylindrical member to the third cylindrical member. It comprises, when, to provide a pipe joint.

  According to the second aspect of the present disclosure, the second fixing mechanism is configured such that the third cylinder is configured to pass through the through-hole provided in the outer peripheral surface of the third cylindrical member so as not to overlap the second cylindrical member. Having a protrusion that can move between a protruding position that protrudes from the inside of the cylindrical member to the outside and a storage position that is stored inside the through-hole, and the protrusion is fitted to the outside of the third cylindrical member The pipe joint according to the first aspect, in which the single pipe is fixed by being brought into contact with the inner peripheral surface of the single pipe.

  According to the third aspect of the present disclosure, the overlapping portion of the second cylindrical member and the third cylindrical member is provided with through holes at positions corresponding to each other, and the second fixing mechanism is A plate member disposed on the inner side of the third cylindrical member and provided with a protrusion standing between the protruding position and the storage position, and the second cylindrical member and the third cylindrical member from the outside of the second cylindrical member. A pipe joint according to the second aspect is provided, comprising: a bolt inserted into a through-hole of the cylindrical member; and a bolt screwed into a screw hole formed in the plate member.

  According to the fourth aspect of the present disclosure, the plate member provides the pipe joint according to the third aspect, which has a half crack shape.

  According to the fifth aspect of the present disclosure, the first fixing mechanism has a long hole extending in the circumferential direction of the second cylindrical member on the surface of the second cylindrical member, and is larger than a short width of the long hole. A bolt having a head with a diameter and being inserted into the elongated hole; a through hole provided at a position facing the elongated hole in the first tubular member; and a screw that is screwed into the male thread portion of the bolt via the through hole. A pipe joint according to any one of the first aspect to the fourth aspect is provided.

  According to the sixth aspect of the present disclosure, the first to fourth aspects further include a fourth cylindrical member inserted so as to straddle both the first cylindrical member and the third cylindrical member. A pipe joint according to any one of the aspects is provided.

  According to the seventh aspect of the present disclosure, the fourth cylindrical member further includes a fourth cylindrical member that is inserted so as to straddle both the first cylindrical member and the third cylindrical member. The through hole is formed at a position facing the elongated hole of the second cylindrical member and the through hole of the first cylindrical member, and the screwing portion of the first fixing mechanism is formed by the fourth cylindrical member. The pipe joint according to the fifth aspect, which is an internal thread portion provided on an end surface of an inner edge that forms a through hole.

  According to the eighth aspect of the present disclosure, the pipe according to the sixth aspect or the seventh aspect, wherein the longitudinal width of the long hole is a length of 90 degrees to 120 degrees in the circumferential direction of the second cylindrical member. Provide joints.

  According to the ninth aspect of the present disclosure, the first cylindrical member and the third cylindrical member have the same outer diameter, and are set smaller than the outer diameter of the second cylindrical member. To a pipe joint according to any one of the eighth aspects.

  According to the tenth aspect of the present disclosure, the mechanism that can be connected to the single tube at the ends of the first cylindrical member and the third cylindrical member includes the first cylindrical member and the third cylindrical member. The pipe joint according to any one of the first to ninth aspects, comprising: a first notch extending inward in the axial direction from the tip; and a second notch extending in the circumferential direction from the first notch. I will provide a.

  Hereinafter, an embodiment according to the pipe joint of the present invention will be described with reference to the accompanying drawings. In addition, the pipe joint of this invention is not limited to the structure described in the following embodiment.

(Embodiment)
1 to 4 are external views of the pipe joint 2 according to the embodiment. FIG. 1 is a perspective view of the pipe joint 2, and FIG. 2 is an exploded view of the pipe joint 2. FIG. 3 is a perspective view of the plate member 15 of the pipe joint 2, and FIG. 4 is an enlarged side view of the first tubular member 4 of the pipe joint 2.

  The pipe joint 2 shown in FIG. 1 is a connecting member for connecting two single pipes 16 and 18 to each other. The pipe joint 2 includes a first cylindrical member 4, a second cylindrical member 5, and a third cylindrical member 6. In such a configuration, the single tube 16 can be connected to the first cylindrical member 4, and the single tube 18 can be connected to the third cylindrical member 6. The single pipe 16 and the single pipe 18 can be connected to each other via the pipe joint 2. Hereinafter, each structure is demonstrated in order.

  The first cylindrical member 4, the second cylindrical member 5, and the third cylindrical member 6 are all cylindrical members formed in a substantially cylindrical shape. The outer diameter of the second cylindrical member 5 is set to be larger than the outer diameters of the first cylindrical member 4 and the third cylindrical member 6, and the first cylindrical member 4 and the third cylindrical member. 6 is set to substantially the same inner diameter and outer diameter. For this reason, single tubes 16 and 18 having the same size can be connected to the first tubular member 4 and the third tubular member 6.

  The first tubular member 4 and the second tubular member 5 are connected so as to be relatively rotatable in the circumferential direction B. On the other hand, the 2nd cylindrical member 5 and the 3rd cylindrical member 6 are being fixed mutually, and can rotate integrally. With such a configuration, the first cylindrical member 4, the second cylindrical member 5, and the third cylindrical member 6 are connected so as to be relatively rotatable in the circumferential direction B.

  As shown in FIG. 2, the first tubular member 4 has one end 4a and the other end 4b on the opposite side. The one end portion 4a is an end portion on the side connected to the second cylindrical member 5, and the other end portion 4b is an end portion on the side connected to the single tube 16 (FIG. 1).

  A notch 4 e is formed at the other end 4 b of the first tubular member 4 as a mechanism for connecting to the single tube 16. As shown in FIG. 1, the notch 4e has a substantially L-shaped shape. More specifically, as shown in FIG. 4, the notch 4e has a first notch 4p and a second notch 4q. The first notch 4 p is a notch extending inward in the axial direction A from one end of the first cylindrical member 4. The second notch 4q is a notch extending in the circumferential direction B from the first notch 4p. With such a configuration, if the connecting pin 16a extending in the radial direction C of the single tube 16 shown in FIG. 1 is inserted into the notch 4e and the first tubular member 4 is rotated in the circumferential direction B, the single tube 16 Can be connected to the first tubular member 4.

  The second cylindrical member 5 is a cylindrical member that connects the first cylindrical member 4 and the third cylindrical member 6 to each other. The second cylindrical member 5 is rotatably fitted to the first cylindrical member 4 so as to surround the outer peripheral surface of the one end portion 4a of the first cylindrical member 4.

  The third cylindrical member 6 is a cylindrical member that is inserted into the second cylindrical member 5 in the same manner as the first cylindrical member 4. The 3rd cylindrical member 6 is inserted from the opposite side to the side which fits the 1st cylindrical member 4 in the 2nd cylindrical member 5. FIG. As shown in FIG. 2, the third cylindrical member 6 has one end 6a and the other end 6b on the opposite side. The one end portion 6 a is an end portion on the side inserted into the second tubular member 5, and the other end portion 6 b is an end portion on the side connected to the single tube 18.

  A notch 6 e is formed at the other end 6 b of the third cylindrical member 6 as a mechanism for connecting to the single tube 18. Since the notch 6e has the same configuration as the notch 4e of the first tubular member 4 described above, description thereof is omitted.

  The pipe joint 2 further includes a fourth cylindrical member 7 as shown in FIG. The fourth cylindrical member 7 is a cylindrical member that is inserted so as to straddle both the first cylindrical member 4 and the second cylindrical member 6. By providing the fourth tubular member 7, the pipe joint 2 can be supported from the inside in the state after assembly shown in FIG. 1 to ensure strength.

  The pipe joint 2 further includes a first fixing mechanism 8 and a second fixing mechanism 10. The first fixing mechanism 8 is a mechanism for releasably fixing the first cylindrical member 4 and the second cylindrical member 5 to each other. On the other hand, the second fixing mechanism 10 is a mechanism for fixing the single tube 18 fitted to the third cylindrical member 6 to the third cylindrical member 6.

  The 1st fixing mechanism 8 of this embodiment is comprised by the 1st volt | bolt 14 and several through-hole 4c, 5c, 7c. The through hole 4 c is a circular through hole formed in the outer peripheral surface of the first cylindrical member 4. The through hole 5 c is a long hole formed so as to extend in the circumferential direction B on the outer peripheral surface of the second cylindrical member 5. An angle range corresponding to the longitudinal width (length in the circumferential direction B) of the through hole 5c is, for example, 90 degrees to 120 degrees. The through hole 7 c is a circular through hole formed on the outer peripheral surface of the fourth cylindrical member 7. A screw shape is formed on the inner peripheral surface of the through hole 7c, and the first bolt 14 can be screwed together. A screw shape is not formed on the inner peripheral surfaces of the through holes 4c and 5c.

  The 1st volt | bolt 14 is penetrated by the through-hole 5c, the through-hole 4c, and the through-hole 7c from the outer side of the 2nd cylindrical member 5 in order. The first bolt 4 is screwed with the screw shape of the through hole 7c through the through holes 5c and 4c. The head of the bolt 14 has a diameter larger than the short width of the through hole 5c which is a long hole. By pressing the head of the bolt 14 against the outer peripheral surface of the second cylindrical member 5, the relative rotational movement of the first cylindrical member 4 and the second cylindrical member 5 in particular in the circumferential direction B is restricted, respectively. The position of can be fixed.

  The second fixing mechanism 10 includes a plate member 15, a second bolt 17, a protrusion 20, and a plurality of through holes 5f, 6f, 6g, and 15f. The through hole 5 f is a circular through hole formed on the outer peripheral surface of the second cylindrical member 5. The through holes 6 f and 6 g are circular through holes formed on the outer peripheral surface of the third cylindrical member 6. The through hole 15 f is a circular through hole formed on the outer peripheral surface of the plate member 15. The inner peripheral surface of the through holes 5f, 6f, 6g is not formed with a screw shape, whereas the inner peripheral surface of the through hole 15f is formed with a screw shape, and the second bolt 17 is screwed together. Is possible.

  The second bolt 17 is inserted through the through hole 5f, the through hole 6f, and the through hole 15f in order from the outside of the second cylindrical member 5. The second bolt 17 is screwed with the screw shape of the through hole 15f through the through holes 5f and 6f.

  The plate member 15 that forms the through hole 15 f is a plate-like member that is disposed inside the third cylindrical member 6. As shown in FIG. 3, the plate member 15 has a half-cracked shape. By having such a half-cracked shape, the plate member 15 can move in the axial direction of the second bolt 17 inside the third cylindrical member 6, but rotates around the axial direction. Directional movement is restricted. Accordingly, when the second bolt 17 is rotated in a state of being screwed into the through hole 15 f of the plate member 15, the plate member 15 can be moved up and down in the axial direction inside the third cylindrical member 6.

  As shown in FIGS. 2 and 3, a protrusion 20 is erected on the plate member 15. The protrusion 20 is inserted into the through hole 6 g of the third cylindrical member 6. As the plate member 15 moves up and down, the protrusion 20 is stored at a storage position stored inside the through hole 6g and a protruding position protruding from the inside of the third tubular member 6 to the outside through the through hole 6g. It is possible to move between. By rotating the second bolt 17 to move the protrusion 20 from the retracted position to the protruding position, the single tube 18 fitted to the outside of the third cylindrical member 6 is moved with respect to the third cylindrical member 6. Can be fixed.

  A method of using the pipe joint 2 having the above-described configuration will be described. First, the assembled pipe joint 2 shown in FIG. 1 is prepared. Next, the end portion 6 b on one side of the third cylindrical member 6 is inserted into the single tube 18. Next, in a state where the first tubular member 4 is held, the second tubular member 4 and the third tubular member 6 are integrally rotated with respect to the first tubular member 4, so that The notch 6e of the third cylindrical member 6 is fitted into the connecting pin 18a of the pipe 18.

  After fitting the single tube 18, the single tube 18 is fixed to the third cylindrical member 6 using the second fixing mechanism 10. Specifically, by rotating the second bolt 17, the projection 20 together with the plate member 15 is raised from the retracted position to the projecting position and brought into contact with the inner peripheral surface of the single tube 18. As a result, the single tube 18 can be pressed from the inside by the protrusions 20 and fixed so as not to come out of the third tubular member 6.

  Next, the single tube 16 is inserted into the end 4 b on one side of the first cylindrical member 4. Although the second cylindrical member 5 and the third cylindrical member 6 described above are fixed to the single tube 18, the through hole 5 c of the second cylindrical member 5 extends in the circumferential direction B. The first tubular member 4 is in a state of being rotatable in the circumferential direction B with respect to the second tubular member 5. By rotating the first tubular member 4 in the circumferential direction B, the notch 4e of the first tubular member 4 can be fitted into the connecting pin 16a of the single tube 16.

  After fitting the single tube 16, the first cylindrical member 4 and the second cylindrical member 5 are relatively fixed by using the first fixing mechanism 8. Specifically, the first bolt 14 is rotated to press the head of the first bolt 14 against the outer peripheral surface of the second cylindrical member 5. Thereby, while fixing the 1st volt | bolt 14 with respect to the 2nd cylindrical member 5, the 1st cylindrical member 4 in which the 1st volt | bolt 14 is penetrated, and the 4th cylindrical member 7 are made simultaneously. Fix it.

  Especially in the pipe joint 2 by the usage method mentioned above, the 1st cylindrical member 4 for connecting the single pipe | tube 16 and the 3rd cylindrical member 6 for connecting the single pipe | tube 18 are mutually rotatable. It is attached. As a result, the single tubes 16 and 18 are rotated without rotating the single tubes 16 and 18, thereby rotating the single tubes 16 and 18 with the first cylindrical member 4 and the first cylindrical member 4. 3 cylindrical members 6 can be connected. Single pipes used for scaffolds are often long (for example, 4 m). If you try to connect the single pipe side instead of the pipe joint side, the workability deteriorates due to the length and weight of the single pipe. There is also danger. On the other hand, in the above method of use, the single pipe 16 and the single pipe 18 can be connected to each other by rotating the pipe joint 2 itself. In addition, workability can be improved.

  As described above, the pipe joint 2 of the embodiment is the pipe joint 2 for connecting the single pipe 16 and the single pipe 18, and includes the first cylindrical member 4, the second cylindrical member 5, 3 cylindrical members 6, a first fixing mechanism 8, and a second fixing mechanism 10. The 1st cylindrical member 4 is a member which has the mechanism (notch 4e) which can be connected by rotating the single pipe | tube 16 to the circumferential direction B in the edge part 4b of one side. The second cylindrical member 5 is a member that is rotatably fitted to the first cylindrical member 4 so as to surround the outer peripheral surface of the other end 4 a of the first cylindrical member 4. The 3rd cylindrical member 6 is a member which has the mechanism (notch 6e) which can be connected by rotating the single pipe 18 to the circumferential direction B in the edge part 6b of one side. The third cylindrical member 6 is further inserted from the opposite side of the other cylindrical end 5a of the second cylindrical member 5 with the first cylindrical member 4 and is second cylindrical. It rotates integrally with the member 5. The first fixing mechanism 8 fixes the first cylindrical member 4 and the second cylindrical member 5 to each other so that the first cylindrical member 4 and the second cylindrical member 5 can be released at the overlapping portion of the first cylindrical member 4 and the second cylindrical member 5. It is a mechanism to do. The second fixing mechanism 10 is a mechanism for releasably fixing the single tube 18 connected to the third cylindrical member 6 to the third cylindrical member 6.

  In such a configuration, the first cylindrical member 4 and the third cylindrical member 6 are connected to each other via the second cylindrical member 5 so as to be rotatable. Therefore, if the first cylindrical member 4 or the third cylindrical member 6 is rotated without rotating the single tubes 16 and 18, the first cylindrical member 4 or the third cylindrical member 6 is rotated. The single tubes 16 and 18 can be connected to each other. Thus, by rotating and connecting the pipe joint 2 itself, unlike the case where the single pipes 16 and 18 are connected by rotating, the connecting operation for connecting the single pipe 16 and the single pipe 18 can be easily performed. Workability and safety can be improved.

  Furthermore, by providing the first fixing mechanism 8 and the second fixing mechanism 10, the single pipes 16 and 18 can be firmly fixed in a state of being fitted to the pipe joint 2, and the safety is further improved. be able to.

  In the pipe joint 2 of the embodiment, the second fixing mechanism 10 has a protrusion 20. The protrusion 20 protrudes from the inside of the third cylindrical member 6 to the outside through a through hole 6 g provided on the outer peripheral surface of the third cylindrical member 6 at a position not overlapping the second cylindrical member 5. It can move between the protruding position and the storage position stored inside the through hole 6g. The single tube 18 is fixed by bringing the protrusion 20 into contact with the inner peripheral surface of the single tube 18 fitted to the outside of the third cylindrical member 6. According to such a configuration, the second fixing mechanism 10 can be realized with a simple configuration.

  In the pipe joint 2 of the embodiment, the through holes 5f and 6f are provided at positions corresponding to each other in the overlapping portion of the second cylindrical member 5 and the third cylindrical member 6. The second fixing mechanism 10 further includes a plate member 15 and a second bolt 17. The plate member 15 is a plate-like member that is disposed on the inner side of the third cylindrical member 6 and has the protrusions 20 erected. The second bolt 17 is inserted into the through hole 5 f of the second cylindrical member 5 and the through hole 6 f of the third cylindrical member 6 from the outside of the second cylindrical member 5, and is attached to the plate member 15. Screwed into the formed through hole 15f. According to such a configuration, the second fixing mechanism 10 can be realized with a simple configuration.

  Moreover, in the pipe joint 2 of embodiment, the plate member 15 has a half crack shape. According to such a configuration, the second fixing mechanism 10 can be realized with a simple configuration.

  The pipe joint 2 of the embodiment further includes a fourth cylindrical member 7 that is inserted so as to straddle both the first cylindrical member 4 and the third cylindrical member 6. According to such a configuration, it is possible to increase the strength by supporting the pipe joint 2 from the inside, and it is possible to improve safety.

  In the pipe joint 2 of the embodiment, the first fixing mechanism 8 includes the through holes 4 c, 5 c, 7 c and the first bolt 14. The through hole 5 c is a long hole extending in the circumferential direction B of the second cylindrical member 5 on the surface of the second cylindrical member 5. The through hole 4 c is provided at a position facing the through hole 5 c in the first tubular member 4. The first bolt 14 has a head having a diameter larger than the short width of the through hole 5c and is inserted into the through holes 5c and 4c. The through hole 7c is an internal thread portion that is screwed into the external thread portion of the first bolt 14 through the through holes 5c and 4c. According to such a configuration, the first fixing mechanism 8 can be realized with a simple configuration.

  In the pipe joint 2 of the embodiment, the longitudinal width of the through hole 5 c that is a long hole is a length corresponding to 90 ° to 120 ° in the circumferential direction of the second tubular member 5. According to such a configuration, by setting the longitudinal width in the circumferential direction B of the through hole 5c to a predetermined angle, the second cylinder is secured while ensuring the minimum length necessary for connection with the single pipe 16. The strength of the shaped member 5c can be maintained.

  In the pipe joint 2 of the embodiment, the outer diameters of the first cylindrical member 4 and the third cylindrical member 6 are the same and are set smaller than the outer diameter of the second cylindrical member 5. In this way, by setting the outer diameters of the first cylindrical member 4 and the third cylindrical member 6 to be the same, the single tubes 16 and 18 having the same size can be connected to each other. Can be increased.

  In the pipe joint 2 of the embodiment, the notch 4e, which is a mechanism that can be connected to the single pipe 16 at the end 4b of the first cylindrical member 4, includes the first notch 4p and the second notch. Part 4q. The first notch 4 p is a notch extending inward in the axial direction A from the tip of the first cylindrical member 4. The second notch 4q is a notch extending in the circumferential direction B from the first notch 4p. Thus, by configuring the connection mechanism with the single tube 16 by such a notch 4e, the connection pin 16a extending in the radial direction C of the single tube 16 can be inserted into the notch 4e and rotated in the circumferential direction B. In this case, the single tube 16 can be connected to the first tubular member 4 so as not to come off. For this reason, the single pipe | tube 16 can be easily connected with the 1st cylindrical member 4, and the safety | security of work and workability | operativity can be improved. In the above description, the connection between the first tubular member 4 and the single tube 16 has been described. However, the same configuration is adopted for the connection between the third tubular member 6 and the single tube 18, and the same effect can be obtained. Can play.

  Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above embodiment. For example, in the embodiment, the case where the first tubular member 4 and the second tubular member 5 are provided with the notch 4e and the notch 6e is described, but the present invention is not limited to such a case. Even if it is a case where a notch is provided only in one cylindrical member among two cylindrical members, the case where a notch is not provided in any cylindrical member may be sufficient. In addition to the connection form using the connection pins 16a and 18a and the notches 4e and 6e described above, any connection form may be adopted as long as it can be connected by rotation in the circumferential direction B.

  In the embodiment, the case where the first fixing mechanism 8 is configured by the first bolt 14 and the like has been described. However, the present invention is not limited to such a case, and the first cylindrical member 4 and the second cylindrical member are used. Any configuration may be adopted as long as 5 can be releasably fixed to each other.

  In the second embodiment, the case where the second fixing mechanism 10 is configured by the second bolt 17 and the like has been described. However, the present invention is not limited to this case, and the single tube 18 is released to the third cylindrical member 6. An arbitrary configuration may be adopted as long as it can be fixed.

  Moreover, although embodiment demonstrated the case where the angular range of the circumferential direction B where the long hole 5c in the 2nd cylindrical member 5 is extended is 90 degrees-120 degrees, it is not restricted to such a case. For example, in consideration of the length of the notch 4e and the notch 6e in the circumferential direction B, the extension angle of the elongated hole 5c is determined so as to ensure a form connectable to the single tubes 16 and 18. Also good.

  This indication is applicable if it is a pipe joint for connecting a single pipe and a single pipe.

2 Pipe joint 4 1st cylindrical member 4a One end part 4b Other end part 4c Through-hole 4e Notch 4p 1st notch part 4q 2nd notch part 5 2nd cylindrical member 5c Through-hole (elongate hole) )
5f Through-hole 6 3rd cylindrical member 6a One end part 6b Other end part 6e Notch 6f Through-hole 6g Through-hole 7 4th cylindrical member 7c Through-hole (screwing part)
8 First fixing mechanism 10 Second fixing mechanism 14 First bolt 15 Plate member 15f Through hole (female screw portion)
16, 18 Single tube 16a, 18a Connecting pin 17 Second bolt 20 Protrusion A Axial direction B Circumferential direction C Radial direction

Claims (10)

A pipe joint for connecting a single pipe and a single pipe,
A first tubular member having a mechanism that can be connected by rotating a single pipe in the circumferential direction at one end;
A second tubular member rotatably fitted to the first tubular member so as to surround the outer peripheral surface of the other end portion of the first tubular member;
A mechanism that can be connected by rotating a single tube in the circumferential direction is provided at one end, and the other end is opposite to the side of the second cylindrical member that fits with the first cylindrical member. A third cylindrical member inserted from the side and rotating integrally with the second cylindrical member;
A first fixing mechanism for releasably fixing the first cylindrical member and the second cylindrical member to each other at an overlapping portion of the first cylindrical member and the second cylindrical member;
A second fixing mechanism for releasably fixing the single pipe connected to the third cylindrical member to the third cylindrical member;
With a pipe joint.   The second fixing mechanism protrudes outward from the inside of the third cylindrical member via a through-hole provided in the outer peripheral surface of the third cylindrical member so as not to overlap the second cylindrical member. A protrusion that can move between the position and the storage position stored inside the through hole, and the protrusion is brought into contact with the inner peripheral surface of a single tube that is fitted to the outside of the third cylindrical member The pipe joint according to claim 1, wherein the single pipe is fixed. In the overlapping part of the second cylindrical member and the third cylindrical member, through holes are provided at positions corresponding to each other,
The second fixing mechanism is disposed on the inner side of the third cylindrical member and has a plate member provided with a protrusion that moves between the protruding position and the storage position, and a second member from the outer side of the second cylindrical member. The pipe joint according to claim 2, further comprising a second cylindrical member and a bolt inserted into a through hole of the third cylindrical member and screwed into a screw hole formed in the plate member.   The pipe joint according to claim 3, wherein the plate member has a half crack shape.   The first fixing mechanism has a long hole extending in the circumferential direction of the second cylindrical member on the surface of the second cylindrical member and a head having a diameter larger than the short width of the long hole. It is comprised by the volt | bolt penetrated, the through-hole provided in the position facing a long hole in a 1st cylindrical member, and the screwing part screwed together in the external thread part of a bolt via a through-hole. The pipe joint according to any one of 1 to 4.   The pipe joint according to any one of claims 1 to 4, further comprising a fourth cylindrical member that is inserted so as to straddle both the first cylindrical member and the third cylindrical member. A fourth cylindrical member inserted so as to straddle both the first cylindrical member and the third cylindrical member;
The fourth cylindrical member forms a through hole at a position facing the elongated hole of the second cylindrical member and the through hole of the first cylindrical member,
The pipe joint according to claim 5, wherein the screwing portion of the first fixing mechanism is a female screw portion provided on an end surface of an inner edge forming a through hole of the fourth cylindrical member. The pipe joint according to claim 5 or 7, wherein a longitudinal width of the long hole is a length corresponding to 90 degrees to 120 degrees in the circumferential direction of the second cylindrical member.   The outer diameter of the 1st cylindrical member and the 3rd cylindrical member is the same, and is set smaller than the outer diameter of a 2nd cylindrical member, The description of any one of Claim 1 to 8 Pipe joint.   The mechanism that can be connected to the single tube at the ends of the first cylindrical member and the third cylindrical member is a first extending axially inward from the tips of the first cylindrical member and the third cylindrical member. The pipe joint according to any one of claims 1 to 9, comprising a notch and a second notch extending in the circumferential direction from the first notch.

Images