JPH0229884B2 - - Google Patents

Description

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

[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. This locking pawl is constructed to have elastic force and is provided as a complex piece surrounding the tube body. As an example of such a joint, the locking claws are set so that the inner edge of the plurality of locking claws has a smaller diameter than the outer diameter of the tube to be inserted, and the tube is locked. When inserted against the elastic force of the pawl, the locking pawl is configured to come into pressure contact with the outer wall of the tube body due to its own elastic force, and when the tube body is pulled in the direction of removal, the locking pawl closes the tube. There are some that are embedded in the outer wall of the body and cannot be prevented from coming out. 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.

[Purpose of the invention]

The present invention overcomes the problems of the conventional ones described above, and allows insertion of the tube body with small force.
Moreover, it is an object of the present invention to provide a clamp member that is used in a joint that can stably connect pipe bodies and allows this joint to exhibit the above-mentioned functions.

[Summary of the invention]

The present invention has a cylindrical joint body in which an insertion hole is formed into which the tip end of a pipe to be connected is inserted, and a joint body adjacent to the joint body in the axial direction, which is rotatable around the axis. A clamp member interposed between the rotating ring and the clamp body, which is made of an elastic thin plate-like member and has a C-shape with an opening communicating inside and outside on one side, and a clamp body facing the opening. a reinforcing piece that bends the base of the clamp body at a nearly right angle to elastically open and close the clamp body;
A projecting piece is provided between the base and both ends of the clamp body to open and close the clamp body by fitting into a cam groove provided in the circumferential direction of the rotary ring.

[Embodiments of the invention]

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

Figures 2A and B show the open position of the pipe body of a joint to which the clamp member according to the present invention is applied, and Figures 3A and B show the closed position of the joint body. A through hole 2 having a regular hexagonal cross section is formed inside the hole 1 . 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 substantially V-shaped cross section is fitted to the inner peripheral side of the tip of the thin wall portion 4 so as to engage with the stepped portion 5. 4 is held by a retaining ring 7 fitted on the holder 4. Further, inside 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 hole 9, thereby bending the tubular body 8.

A flat U-shaped annular groove 10 is formed in the outer circumferential surface 4a of the thin wall portion 4 of the joint body 1. On the other hand, a rotating ring 11 is disposed adjacent to the thin wall portion 4 in the axial direction.
A guide sleeve 12 protruding from the thin wall portion 4 is slidably disposed on the outer circumferential surface 4a of the thin wall portion 4, and an annular protrusion 13 provided around the inner circumferential surface 12a of the guide sleeve 12 engages the annular groove 10. The rotation ring 11 is fitted into the joint body 1 to guide the rotation of the rotary ring 11 relative to the joint body 1. In addition, the guide sleeve 1
A retaining ring 14 is attached to the outer circumferential surface 12b of 2, and is adapted to maintain the state in which the annular protrusion 13 is fitted into the annular groove 10. and,
On the end surface 11a of the rotary ring 11 adjacent to the joint body 1, a pair of curved cam grooves 15A and 15B each having a diameter of approximately 120 mm is provided on the end surface 11a of the rotary ring 11 on the side adjacent to the joint body 1.
The rotary ring 11 is protruded symmetrically with respect to the center of the rotary ring 11 over a range of degrees.

On the other hand, a clamp member 16 according to the present invention 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 is provided with a center hole 17 having 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 off a part of the annular shape. Both tip ends 20A and 20B located on both sides of an opening 19 that communicates the inside and outside of the center hole 17 of the clamp body 18 can be opened and closed as shown by arrows in FIG. Further, the clamp body 1 facing the opening 19
The outer edge 21a of the base 21 of No. 8 is formed in a straight line, and as a result, a narrow portion 22 is formed in the center of the base 21 to facilitate opening and closing of the two tips 20A and 20B. There is. Furthermore, a rectangular reinforcing piece 23 is bent downward along the outer edge 21a of the base 21, and both tip portions 23 are bent downward.
The strength of the clamp body 18 against opening and closing of 0A and 20B is increased and strong elasticity is provided. Furthermore, both outer edges 18A of the clamp body 18 between both tip portions 20A, 20B and the base 21,
Rectangular protruding pieces 24A, 24B are bent upward along the line 18B, and both protruding pieces 24A, 24
B is the cam groove 15A, 15B of the rotating ring 11
It constitutes a cam follower that fits into the cam follower. As the rotating ring 11 rotates, both projecting pieces 2
4A, 24B are located within the ends of the maximum radius of both cam grooves 15A, 15B, the inner peripheral edge 16a of the clamp member 16 is located within the ends of both tips 20A, 2
0B opens and the clamp member 16 assumes the tubular body open position, retracting to the outside of the insertion hole 9 of the joint body 1, and both protruding pieces 24A, 24B are located on the minimum radius side of both cam grooves 15A, 15B. When located within the end, the inner peripheral edge 16 of the clamp member 16
A is designed to face the inside of the insertion hole 9 of the joint main body 1 when both the distal ends 20A and 20B are closed and the clamp member 16 assumes the tubular body clamping position.

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

In order to connect to the joint body 1, as shown in FIG.
4B is located within the maximum radius end of the cam grooves 15A, 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. and,
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 cam grooves 15A, 15B of the rotating ring 11 where the protruding pieces 24A, 24B are located
As the radius gradually becomes smaller, the clamp member 1
As shown in FIG. 4B, the clamp main body 18 of No. 6 gradually closes as both tip portions 20A and 20B gradually approach each other, and finally the rotating ring 11 is rotated clockwise from the state shown in FIG. 4A. In the state shown in FIG. 4C, which has been rotated approximately 120 degrees in the direction, both tips 20A and 20B of the clamp body 18 are in contact with each other, and the inner peripheral edge 16a of the clamp member 16 is at a position facing inside the inner diameter of the insertion hole 9 of the joint body 1. 2A, the outer periphery of the tubular body 8 is bent inward in an annular shape, and the tubular body 8 is held by inserting it into the tubular body 8. At this time, the narrow width portion 22 of the base 21 of the clamp body 18
is bent almost in a V-shape, but the reinforcing piece 23
1, 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 rotary ring 11 approximately 120 degrees counterclockwise from the state shown in FIG. 4C and return it to the state shown in FIG. 4A. The tubular body 8 may be pulled out by opening both tip ends 20A 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.

As described above, according to this embodiment, the rotating ring 11
Since the clamp member 16 can be opened and closed by rotating the clamp member 16, it is possible to insert and pull out the tubular body 8 into and out of the joint body 1 while keeping the clamp member 16 in the open position. Pulling out can be performed with a small force, and the cam groove 15 of the rotating ring 11
Clamp member 16 opened and closed along A and 15B
This makes it possible to stably hold the tubular body 8.

〔Effect of the invention〕

As explained above, in the clamp member according to the present invention, the projecting piece fits into the cam groove of the rotating ring, and the clamp body opens and closes as the rotating ring rotates. The operation of inserting and attaching the tube body can be easily performed. Also,
By rotating the rotating ring in the tightening direction,
Since the inner edge of the clamp body grips the tube body by biting into the outer circumferential surface of the tube body, it can effectively prevent and connect even flexible tube bodies, making it effective for pipe joints. It can be used effectively.

[Brief explanation of drawings]

1 to 4 show embodiments of the clamp member according to the present invention, in which FIG. 1 is a perspective view of the clamp member, FIG. 2A is a vertical cross-sectional front view of the joint in an open state, Figure B is a plan view of a portion corresponding to Figure 2A, Figure 3A is a longitudinal sectional view of the joint in the closed state, Figure 3B is a plan view of a portion corresponding to Figure 3A, Figures 4A and B. , C is a plan view showing the opening/closing operation of the clamp member. 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 part, 21 ...
Base, 22... Narrow width part, 23... Reinforcement piece, 24
A, 24B... protrusion.

Claims (1)

[Scope of Claims] 1. A cylindrical joint body in which an insertion hole is formed into which the tip of the pipe body to be connected is inserted, and a joint body adjacent to the joint body in the axial direction and rotatable about the axis of the joint body. A clamp member interposed between a rotary ring and a rotating ring, the clamp body being made of an elastic thin plate-like member and having a C-shape and having an opening on one side that communicates the inside and outside, and the opening. A reinforcing piece that elastically opens and closes the clamp body by bending the base of the clamp body facing the clamp body at a nearly right angle, and a cam provided in the circumferential direction of the rotating ring between the base and both ends of the clamp body. A clamp member characterized by having a projecting piece that fits into a groove to open and close a clamp body.