JPS63135690A - Joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] - The present invention relates to a joint for connecting tubular bodies or rod-shaped bodies made of an elastic material.

[Prior art and its problems]

There are various types of joints that connect a tubular or rod-like body made of an elastic material to a required location. Generally, the hole is provided with a locking pawl that sinks into the outer wall of the tube inserted into the insertion hole to prevent the tube from coming out. The locking pawl is set so that its configuration has a smaller diameter than the outer diameter of the tube to be inserted, and when the tube is inserted against the elastic force of the locking pawl, the locking pawl will It is constructed so that it comes into pressure contact with the outer wall of the tubular body by its own elastic force, and when the tubular body is pulled in the direction of removal, the locking pawl sinks into the outer wall of the tubular body and is prevented from being removed.

In this case, to remove the tubular body, a release ring is inserted between the tubular body and the locking pawl, and the distal end of the release ring presses the locking pawl to release the locking of the tube into the outer wall of the tube.

However, in such conventional joints, the tube must be inserted against the elastic force of the locking pawl, and the resistance when inserting the tube is large, requiring a relatively large force to connect the tube. There was a problem.

(Object of the Invention) The present invention overcomes the problems of the conventional ones described above, and provides a joint that can insert a pipe body with a small force and can stably connect the pipe bodies. The purpose is to

[Summary of the invention]

The present invention includes a cylindrical joint body in which an insertion hole is formed into which the tip of a pipe to be connected is inserted, and a rotary joint body adjacent to the joint in the axial direction and rotatable in the circumferential direction of the joint body. ring, and a substantially C-shaped clamp member which is interposed between the rotary ring and the joint body and whose both ends can be opened and closed to take a position for tightening the pipe body and a position for opening the pipe body. A cam is formed on one side of the ring and the clamp member, and a cam follower is formed on the other side that engages with the cam to open and close both ends of the clamp member. The tube is inserted into the tube, and then the rotary ring is rotated by a predetermined angle to cause the clamp member to take the tube closed position and fix the tube.

[Embodiments of the invention]

The present invention will be explained below with reference to embodiments shown in the drawings.

Figures 1A and B show the tube in its open position, and Figures 2A and B show its closed position.A through hole 2 with a regular hexagonal cross section is formed inside the cylindrical joint body 1. has been done. At one end of the joint body 1, a thin wall portion 4 is integrally protruded through a stepped portion 3A and a stepped portion 3B on the inner and outer peripheries, respectively. Further, a stepped portion 5 is formed. A seal ring 6 having a roughly V-shaped cross section is fitted on the inner peripheral side of the tip of the thin wall portion 4 so as to engage with the stepped portion 5. Retaining ring 7 fitted to section 4
It is maintained by Further, the inside of the thin wall portion 4 is an insertion hole 9 into which a tubular body 8, which is an example of a tube made of an elastic material, is inserted with its tip abutting against the stepped portion 3A. The seal ring 6 comes into pressure contact with the tubular body 8 inserted into the insertion hole 9, thereby bending the tubular body 8.

A flat, mouth-shaped annular groove 10 is formed on the outer circumferential surface 4a of the thin wall portion 4 of the joint body 1. On the other hand, the thin portion 4
A rotating ring 11 is disposed adjacent to the rotating ring 11 in the axial direction, and a guide sleeve 12 protruding from the rotating ring 11 is disposed so as to be slidable on the outer peripheral surface 4a of the thin wall portion 4. An annular projection 13 provided around the inner circumferential surface 12a of the guide sleeve 12 is connected to the annular groove 101. : Fits together to guide the rotation of the rotary ring 11 relative to the joint body 1. Further, a retaining ring 14 is attached to the outer circumferential surface 12b of the guide sleeve 12 to maintain the state in which the annular protrusion 13 is fitted into the annular groove 10. A pair of curved cam grooves 15A and 15B are provided on the end surface 11a of the rotary ring 11 on the side adjacent to the joint body 1, respectively, so that the radius from the center of the rotary ring 11 gradually increases in a clockwise direction in a plane. Approximately 120
The rotary ring 11 is provided in a protruding manner symmetrically with respect to the center of the rotating ring 11 over a range of degrees.

On the other hand, a clamp member 16 is interposed between the retaining ring 7 of the joint body 1 and the end surface 11a of the rotating ring 11. This clamp member 16 is entirely made of a flexible material such as rubber or plastic, and has a center hole 17 with an inner diameter slightly larger than the inner diameter of the insertion hole 9 of the thin wall portion 4. It has an approximately C-shaped clamp body 18 formed by cutting a groove in a part of the annular shape.

Both tip portions 20A, 20 are located on both sides of the opening 19 that communicates the inside and outside of the center hole 17 of the clamp body 18.
B can be opened and closed as shown by the arrows in FIG. Further, the base 21 of the clamp body 18 facing the opening 19 has an outer edge 21a formed in a straight line, and as a result, the center portion of the base 21 has a shape that allows easy opening and closing of the two end portions 20A and 20B. A narrow portion 22 for tightening is formed. Furthermore, a rectangular reinforcing piece 23 is bent downward along the outer edge 21a of the base 21 to increase the strength of the clamp main body 18 against opening and closing of the both ends 20A and 20B and to provide strong elasticity. I have to. Furthermore, the outer edges 18A, 1
Rectangular protrusions 24A, 24B are bent upward along line 8B, and both protrusions 24A, 24B constitute a cam follower that fits into the cam grooves 15A, 15B of the rotary ring 11. As the rotary ring 11 rotates, both protrusions 24A and 24B move into both cam grooves 15A and 15.
When the clamp member 16 is located within the maximum radius end of the clamp member 16, the inner circumferential edge 16a of the clamp member 16 has both tip ends 2OA,
B is opened and the clamp member 16 assumes the tubular body open position, thereby retracting to the outside of the insertion hole 9 of the joint body 1, and both protruding pieces 24A, 24B are inserted into both cam grooves 15A.

15B, the inner circumferential edge 16a of the clamp member 16 is located within the end portion of the clamp member 16 on the minimum radius side.
0B is closed and the clamp member 16 takes a position for tightening the tubular body, so that it faces the inside of the insertion hole 9 of the joint body 1.

Next, the operation of the embodiment described above will be explained.

In order to connect to the joint body 1, as shown in FIG. 4A, both protruding pieces 24Δ of the clamp member 16 are used.

24B is positioned within the maximum radius end of the cam grooves 15A and 15B of the rotating ring 11, and the inner peripheral edge 16a of the clamp body 18 of the clamp member 16 is retracted to the outside of the insertion hole 9 of the thin wall portion 4 of the joint body 1. Regulate to do so.

In this manner, the tubular body 8 is inserted into the insertion hole 9 of the thin wall portion 4 of the joint body 1 so as to pass inside the rotary ring 11 . Then, since the tubular body 8 simply comes into sliding contact with the seal ring 6, it can be inserted with a relatively light force. When the tip of the tubular body 8 comes into contact with the stepped portion 3A and stops, the rotary ring 11 is rotated clockwise in FIG. 4A. Then, the radii of the cam grooves 15A, 15B of the rotary ring 11 where the protrusions 24A, 24B are located gradually become smaller, so that the clamp body 18 of the clamp member 16 gradually becomes closer to the tip ends 2OA of the clamp member 16, as shown in FIG. 4B.
, 20B gradually enter the open chain state as they approach each other,
Finally, in the state shown in FIG. 4C, in which the rotary ring 11 is rotated approximately 120 degrees clockwise from the state shown in FIG. The peripheral edge 16a is the insertion hole 9 of the joint body 1
The tubular body 8 is held by inserting it into the tubular body 8 by bending the outer periphery of the tubular body 8 inward in an annular shape as shown in FIG. 2A.

At this time, the narrow portion 22 of the base portion 21 of the clamp body 18 is bent into a substantially V shape, but the reinforcing piece 23 is bent at the outer edge of the base portion 21.
Since it is formed along 1a, there is no risk that the narrow width portion 22 will be damaged.

On the other hand, in order to remove the tubular body 8 connected to the joint body 1, rotate the rotating ring 11 approximately 120 degrees counterclockwise from the state shown in FIG. 4C to return it to the state shown in FIG. 4A. The tubular body 8 may be pulled out by opening both tip ends 2OA and 20B of the clamp body 18, placing the clamp body 18 in the tubular body open position.

When the tubular body 8 is pulled out, only the seal ring 6 acts as a resistance, so that the tubular body 8 can be easily pulled out.

According to this embodiment, the clamp member 16 can be opened and closed by rotating the rotary ring 11, so the clamp member 16 can be placed in the open position and the joint body 1 can be opened and closed.
The tubular body 8 can be inserted into and pulled out from the cam groove 15A of the rotating ring 11, and the tubular body 8 can be inserted and pulled out with a small force.

The tubular body 8 can be stably held by the clamp member 16 that is opened and closed along the line 15B.

In the embodiment described above, the rotating ring 11 is provided with cams 1ll115A, 15B, and the clamp member 16 is provided with cam grooves 15A, 15B1. : Although it has been explained that the protrusions 24A and 24B forming the cam followers to be fitted are formed, the cam grooves 15A and 15 are formed in the clamp member 16.
It is also possible to form a so-called reverse cam in which the rotary ring 11 is formed with projecting pieces 24Δ and 24B.

〔Effect of the invention〕

As explained above, according to the present invention, not only can the tube bodies be inserted with a small force, but also the tube bodies can be stably connected, which is a practical effect.

[Brief explanation of the drawing]

1 to 4 show embodiments of the joint according to the present invention, FIG. 1A is a vertical cross-sectional front view of the joint in the open state, and FIG. 1B is a corresponding portion of FIG. 1A. Floor plan, 2nd
Figure Δ is a longitudinal cross-sectional view of the joint in the closed state, Figure 2B is a plan view of a portion corresponding to Figure 2A, Figure 3 is a perspective view of the clamp member, and Figures 4A, B, and C are views of the clamp member. FIG. 3 is a plan view showing an open M operation. DESCRIPTION OF SYMBOLS 1... Joint body, 4... Thin wall part, 6... Seal ring, 8... Tubular body, 9... Insertion hole, 11... Rotating ring, 15A, 15B... Cam groove , 16... Clamp member, 17... Center hole, 18... Clamp body, 20A. 20B...Tip portion, 21...Base portion, 22...Narrow width portion, 23...Reinforcement piece, 24A, 24B...Protrusion piece. Applicant's agent Takashi Watanuki Fuin side Figure 1 Figure 2 (Al (Figure A1)
Figure 3

Claims (1)

[Claims] A cylindrical joint body in which an insertion hole is formed into which the tip of the pipe body to be connected is inserted; a rotary ring adjacent to the joint in the axial direction and rotatable in the circumferential direction of the joint body; A substantially C-shaped clamp member is provided between the rotary ring and the joint body and can open and close its ends to take a tube body tightening position and a tube body open position, and one of the rotary ring and the clamp member is provided. A joint characterized in that a cam is formed on one side of the joint, and a cam follower that engages with the cam and opens and closes both ends of a clamp member is formed on the other side.