JPH0229885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joint for connecting tubular 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 in a plurality of pieces 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 sink into the outer wall of the body and are 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]

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned problems with the conventional joints, and to provide a joint that can insert a pipe body with a small force and that can stably connect the pipe bodies. .

[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 joint body that is adjacent to the joint in the axial direction and rotates about the axis of the joint body. It consists of a freely rotatable rotating ring and a pair of thin plate-like members, and is interposed between the joint body and the rotating ring to face each other, and the inner edge, which is a gripping part that sinks into the outer surface of the inserted tube, is about the same size as the insertion hole. A clamp member formed in an arc shape and guided to advance and retreat in a direction perpendicular to the axis of the insertion hole; a cam formed on one of the rotating ring and the clamp member; and a cam formed on the other, and engaged with the cam. By rotating the rotary ring, a cam follower is formed that moves both clamp members toward and away from each other to open and close between the tube body tightening position and the tube body open position. The tubular body is inserted into the main body, and then the rotary ring is rotated by a predetermined angle to force the clamp member to take the tubular closed position and fix the tubular body.

[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 open position of the tube, Figure 2A and B
1 indicates the closed position of the tube, and inside the cylindrical joint body 1 there is a through hole 2 with a regular hexagonal cross section.
is formed. One end of this joint body 1 has stepped portions 3 on the inner and outer peripheries, respectively.
A, a thin wall portion 4 integrally projects through the step portion 3B, and a step portion 5 is further formed on the inner peripheral side of the tip of the thin wall portion 4. Then, the stepped portion 5
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 thin wall portion 4. It is held by a retaining ring 7.
Further, inside the thin part 4, a tubular body 8, which is an example of a tubular body made of an elastic material, has its tip connected to the stepped part 3.
The tubular body 8 inserted into the insertion hole 9 is an insertion hole 9 that is inserted so as to come into contact with A.
The seal ring 6 is in pressure contact with the tubular body 8 to bend it.

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 1 is disposed between the retaining ring 7 of the joint body 1 and the end surface 11a of the rotating ring 11.
6 is interposed. The entire clamping member 16 is made of an elastic material such as stainless steel, and the clamping member 16 has a pair of substantially arc-shaped central holes 17 having an inner diameter slightly larger than the inner diameter of the insertion hole 9 of the thin wall portion 4. Clamp body 18A, 1
It has 8B. In addition, this clamp body 18
Rectangular guide protrusions 19A, 19B, 19B are bent downward at both ends of each of the clamp bodies 18A, 18B. 18B is fitted into a guide groove (not shown) formed to be able to open and close, and the clamp bodies 18A, 18
It is designed to stabilize the opening/closing operation of B. Furthermore, rectangular driven protrusions 21A, 21B are bent upwardly along the arcuate outer edges 20A, 20B at the center of the pair of clamp bodies 18A, 18B. Parts 21A, 21B
constitutes a cam follower that fits into the cam grooves 15A, 15B of the rotating ring 11. Note that the guide protrusions 19A, 19A, 19B, 19B
extends in a direction transverse to the tangential direction at the circumferential center of the driven protrusions 21A, 21B. As the rotary ring 11 rotates, both the driven protrusions 21A and 21B move into the cam grooves 15A and 1.
5B, the clamp bodies 18A and 18B are separated and the inner gripping parts 22A and 22B are opened and retracted to the outside of the insertion hole 9 of the joint body 1, and the clamp Member 16
will assume the tubular body open position. Also, both driven protrusions 21A and 21B are connected to both cam grooves 15A and 15B.
When the guide protrusion 19 of both clamp bodies 18A, 18B is located within the end of the minimum radius side
When A, 19A and 19B, 19B come into contact with each other, each of the gripping parts 22A, 22B closes and faces the inside of the insertion hole 9 of the joint body 1, so that 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. 4A, both driven protrusions 21 of the clamp member 16 are
A, 21B to the cam grooves 15A, 1 of the rotating ring 11
A pair of clamp bodies 18A, 18B of the clamp member 16
are regulated so that their respective gripping portions 22A, 22B are retracted to the outside of the insertion hole 9 of the thin wall portion 4 of the joint body 1.

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, both driven protrusions 21A, 21
Cam groove 15A, 1 of rotating ring 11 where B is located
5B gradually becomes smaller in radius, the clamp bodies 18A and 18B of the clamp member 16 move linearly in opposite directions, and the gripping parts 22A and 22B gradually approach each other as shown in FIG. 4B. The clamp bodies 18A, 18B are closed by the guide protrusions 19A at both ends 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. ,19
A and 19B, 19B are in contact with each other so that both gripping parts 22A, 22B are positioned facing the inner diameter of the insertion hole 9 of the joint body 1, and the outer periphery of the tubular body 8 is shaped like a ring as shown in FIG. 2A. The tubular body 8 is held by inserting it into the tubular body 8 so as to bend inward.

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. Clamp body 18A, 18
B can be moved apart by linear motion in opposite directions, and the tubular body 8 can be pulled out by opening both the gripping portions 22A and 22B and placing the clamp bodies 18A and 18B 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
to rotate the clamp body 18 of the clamp member 16.
Since A and 18B can be opened and closed, 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, and to insert and pull out the tubular body 8 with a small force. Furthermore, the tubular body 8 can be stably held by the clamp member 16 that is opened and closed along the cam grooves 15A and 15B of the rotating ring 11.

In the embodiment described above, the cam grooves 15A, 15B are formed in the rotating ring 11, and the clamp bodies 18A, 1 of the clamp member 16 are formed in the cam grooves 15A, 15B.
Although it has been explained that the driven protrusions 22A, 21B forming a cam follower that fit into the cam grooves 15A, 15B are formed in the cam grooves 15A, 15B, the cam grooves 15A, 15B are formed in the clamp bodies 18A, 18B of the clamp member 16, and the rotation Driven protrusions 21A, 21 of ring 11
A so-called reverse cam forming B may also be used.

〔Effect of the invention〕

As explained above, according to the joint according to the present invention, the clamp member is opened and closed by rotating the rotary ring, and the gripping part of the clamp member sinks into the outer periphery of the pipe body during connection. The tube body can be held securely, and the tube body can be easily removed by opening the clamp member, making it possible to stably and easily attach and detach the tube body. play.

[Brief explanation of drawings]

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. 2A is a plan view of the joint in the closed state, FIG. 2B is a plan view of a portion corresponding to FIG. 2A, FIG. 3 is a perspective view of the clamp member, and FIGS. 4A, 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, 18A, 18
B... Clamp body, 21A, 21B... Followed protrusion, 22A, 22B... Gripping part.

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 in the axial direction and rotatable about the axis of the joint body. It consists of a rotating ring and a pair of thin plate-like members, which are interposed between the joint body and the rotating ring to face each other, and whose inner edge, which is a gripping part that sinks into the outer surface of the tube to be inserted, is about the same size as the insertion hole. a clamp member formed in an arcuate shape and guided to advance and retreat in a direction perpendicular to the axis of the insertion hole; a cam formed on one of the rotary ring and the clamp member, and a cam engaged with the cam on the other; A joint characterized in that a cam follower is formed that moves both clamp members toward and away from each other by rotating a rotary ring to open and close the clamp members between a tube tightening position and a tube open position.