JPH0544632Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to joints for tubes, pipes, or various types of shafts, and mainly relates to fittings for tubes, pipes, or shafts that have a circumferential groove for engagement. This invention relates to a joint used for removable fitting.

(Prior Art) There are various conventional methods for coupling tubes or pipes, etc., ranging from a simple method of fixing tubes or pipes together by press-fitting them to each other.
In many cases, these pipes or tubes were screwed together. however,
In such methods, the connected pipes or tubes are often separated from each other by fluid pressure generated in the pipes or tubes, and in the case of threaded connections, thread cutting is required on the pipes or tubes, which causes problems during installation. It was necessary to twist one or the other.

From this point of view, Japanese Patent Application Laid-open No. 152996/1983 and Publication No. 15299/1983
No. 21348, No. 151222 or No. 151222 or No. 61
Various improvements to the joints related to the invention or idea of No. 164882 have been proposed. The main means of this type of pipe joint is to insert or engage various stopper members between the joined pipes from a direction perpendicular to the direction in which the pipes are connected.

In addition, in the pipe connection method proposed in Utility Model Publication No. 59-42552, engaging protrusions are provided in a circumferential manner on the circumferential surface of the pipe itself to be inserted, and slits are provided in the other pipe into which this pipe is inserted. Disclosed is a means for attaching a pipe inserted into the expandable part by fixing it with a clamp fitting.

(Problem to be solved by the invention) However, the previous precedents mentioned above all assume that tubes, pipes, etc. will be continuously attached, and are not suitable for simple attachment and detachment of tubes, pipes, etc. Nakatsuta.

In addition, when inserting or engaging the stopper member from the direction perpendicular to the tubes, pipes, etc. to be connected, a considerable split groove is provided at the connecting position of the tubes, pipes, etc., which reduces the strength of the tubes, pipes, etc. However, there remained a problem in terms of what could be done. The connection structure proposed in Utility Model Application Publication No. 151222/1987, which was proposed to solve this problem, avoids problems with the strength of the conduit itself by separately preparing a sleeve. Since there are a large number of parts and the lock member is handled in a direction perpendicular to the connection direction of the raceway, it was necessary to provide an operating space around the connection of the raceway for inserting and removing the lock member. .

(Means for Solving the Problems) In order to solve the above problems, the joint according to the present invention provides elasticity in the circumferential direction between a plastic cylindrical body A and an annular convex portion of the cylindrical body A. It consists of a plastic lock tube B which is energized and fitted, and the peripheral wall of the cylindrical body A is provided with a window hole 4 for operation, and the lock tube B has the cylindrical shape It is housed in the window hole 4 of the main body A, and the window hole 4
An elastic piece 7 with an engaging convex portion 7a inside the tip portion 7b protrudes inward from the cylindrical body A from the lock cylinder B.
The tip 7b of the elastic piece 7 projects from the edge of the window hole on the side that comes into contact with the rotation of the lock cylinder against the bias. The elastic piece 7 is able to ride on the engagement portion 5 in a detachable manner, and the engagement convex portion 7a of the elastic piece 7 that rides on the engagement portion 5 slightly protrudes inward of the cylindrical body A. The configuration is as follows.

(Function) In order to lock an attached body C such as a tubular body or a rod-shaped body to the joint configured as described above, FIG.
In the state shown in FIG. 2, an annular engagement groove 9 in which the engagement convex portion 7a of the joint engages with the circumferential surface near the end.
By pushing the attached body C having the above-mentioned body through the open end of the joint, the engaging convex portion 7a of the elastic piece 7 of the lock cylinder B is pushed out by the outer peripheral surface of the attached body C,
The elastic piece 7 is bent outward, and further the attached object C
enters and the engagement convex portion 7a of the elastic piece 7 reaches the position of the engagement groove 9, whereby the elastic piece 7 elastically returns to its original state and engages in the engagement groove 9. Therefore, even if the attached body C is pulled outward, it does not come off and maintains a reliable connected state.

Also, when disconnecting the attached body C, the lock cylinder B is rotated relative to the cylindrical body A against the spring bias, and the third
As shown in the figure, the tip 7b of the elastic piece 7 is caused to ride on and engage the engaging part 5 protruding from the edge of the window hole 4 of the cylindrical body A, and the engaging protrusion of the elastic piece 7 7
This is done by bringing the body A into a state where it slightly protrudes inward from the cylindrical body A, and then pulling out the body C to be attached. At this time, the outer circumferential surface of the end portion of the attached body C is
The engagement convex portion 7a of the lock cylinder B is pushed out so as to be bent outward, and the tip portion 7b of the elastic piece 7 of the lock cylinder B is pushed out.
The lock cylinder B floats up from the engaging part 5 of the cylindrical body A and is disengaged from the engaging part 5, and the lock cylinder B is rotated by the resilient force, and the elastic piece 7 is pushed out from the window hole 4 into the cylindrical body. The engagement protrusion 7a is automatically returned to the position in which the engagement protrusion 7a is projected inward.

Incidentally, it is also possible to rotate the lock cylinder B in advance against the cylindrical body A to the state shown in FIG. 3, and then insert the object C into this. , since the tip 7b of the elastic piece 7 of the lock cylinder B rides on the engaging part 5 of the cylindrical body A and is locked, the attached body C can be pushed into the joint with a slight insertion force. can. As the body C is pushed in, the engagement convex portion 7a of the elastic piece 7 slightly protruding inward of the cylindrical body A is deflected outward by the body C. Since the engagement between the engagement protrusion 7a and the engagement part 5 of the cylindrical main body A is released, the engagement protrusion 7a sinks into the window hole 4 from the engagement part 5 that is riding on it. The elastic piece 7 is elastically restored, and the engagement protrusion 7a of the elastic piece 7 is engaged with the engagement groove 9 of the inserted object C.

(Example) Hereinafter, an example of the joint according to the present invention will be described with reference to the drawings.

This joint consists of a plastic cylindrical body A and a plastic lock cylinder B.
has a flange 1 provided in the circumferential direction of the outer peripheral wall surface of the central part and edge flange 2, 2 provided in the circumferential direction of the outer peripheral wall surface of both opening ends a, a as an annular convex part, and this edge flange 2 has an opening end a of the main body A, and the inner and outer circumferential surfaces of the a side are tapered or rounded, and slits s are provided toward the inner side of the opening ends a and a of the cylindrical main body A, respectively. It is designed to facilitate the insertion of the lock cylinder B and the insertion of a cylindrical body such as a tube or a rod-shaped body C to be attached to the joint.

This joint has an attached body C on both sides of the opening ends a and a.
Since it has a similar structure on both sides of the collar 1, the structure of one opening end a side will be explained below.

The lock cylinder B is rotatably fitted between the collar 1 and the edge collar 2 of the cylindrical body A, and a coil spring 3 is installed between the lock cylinder B and the collar 1 so as to surround the lock cylinder B. The bullet is biased in the direction.

Further, in the peripheral wall of the cylindrical body A covered by the lock cylinder B, rectangular window holes 4 for operation are arranged at positions dividing the circumferential direction into four equal parts, one side of which is parallel to the opening surface of the cylindrical body A. The peripheral wall of the window sill 4a on the deep side of the cylinder is cut out by about 1/2 the width of the window hole 4, and the remaining window sill 4a is cut out.
The peripheral wall of the portion connected to the lock cylinder B is an engaging portion 5 with which the elastic piece 7 of the lock cylinder B, which is rotated against the force, comes into contact. Further, a side edge of the engaging portion 5 that is perpendicular to the window edge 4a is a circumferentially inclined surface 5a that slopes upward from the side edge toward the outer circumferential surface of the engaging portion 5, and also pinches the axis. An axial groove 5b is provided on the outer peripheral surface of each engaging portion 5 in the pair of opposing window holes 4, 4 adjacent to the above-mentioned inclined surface 5a.

Further, a window hole 6 is provided in the peripheral wall of the lock cylinder B at a position corresponding to the window hole 4 of the cylindrical body A, and the window edge of the window hole 6 is directed toward the axial direction of the lock cylinder B, and furthermore, a window hole 6 is provided at a position corresponding to the window hole 4 of the cylindrical body A. An elastic piece 7 is provided which protrudes in an inclined direction, and this elastic piece 7 is positioned within each window hole 4 of the cylindrical body A and 1/1/2 of the window hole 4.
It is said to be narrower than 2 width. The tip 7b of the elastic piece 7, which is provided to be inclined inward, is bent outward, and a recess 7' is provided inside the tip 7b. ing. The recess 7' has a surface 7'a facing the outer surface of the peripheral wall of the cylindrical body A in which the window hole 4 is provided,
It is configured to have a surface 7'b orthogonal to the axis of the cylindrical body A, and the inner part of the elastic piece 7 adjacent to the recess 7' is an engagement convex that protrudes most inward of the cylindrical body A. 7a.

Further, the end edge of the tip 7b of each elastic piece 7 on the side opposite to the resilient biasing direction of the lock cylinder B has a circumferentially inclined surface 7c that slopes from the edge toward the inside of the tip 7b. When the lock cylinder B rotates against the resilient force, the cylindrical main body A easily rides onto the engaging part 5, and an elastic piece 7 is attached to the engaging part 5. In the riding state, the engaging convex portion 7a of the elastic piece 7 is located on the same level as the inner circumferential surface of the cylindrical body A or on the outer side of the inner circumferential surface.

Further, the engaging portion 5 having the groove 5b of the cylindrical main body A
The tip portion 7b of each elastic piece 7 positioned in the pair of window holes 4, 4 provided with the above-mentioned inclined surface 7
The surface 7'a on the side of the lock cylinder B that is resiliently biased is removed in a concave step shape other than the edge portion having the shape c, and the remaining edge portion is used as the claw portion 7d. At the same time, when the tip portion 7b rides on the engaging portion 5, the engaging convex portion 7a protrudes inward from the inner circumferential surface of the cylindrical main body A by a width corresponding to the deletion of this concave step shape. It's getting old.

Incidentally, the window hole 4, the corresponding window hole 6, the elastic piece 7 provided therein, etc. may be provided in an arbitrary number of one or more depending on the degree of locking of the target object c.

In addition, a small inner diameter portion 8 is provided in the cylindrical body A at the center in the longitudinal direction by an annular convex portion facing in the circumferential direction, and both sides thereof meet the inner circumferential surface of the cylindrical body A. There are step edges 8a, 8a between them.

The joint configured in this way has a step edge 8a of the joint.
Since the distance between the engagement protrusion 7a and the engagement protrusion 7a is l, the object c to be inserted into the engagement protrusion of the joint is placed on the outer peripheral surface at a position slightly shorter than l from the tip t. 7a is a tubular body or a rod body provided with an annular engagement groove 9 that engages. An attached object C having such a configuration and having an outer diameter that is approximately the same as the inner diameter of the above-mentioned joint.
By pushing in from the opening end a of the joint, the outer circumferential surface of the tip t of the object to be fitted C pushes the engagement protrusion 7a outward, causing the elastic piece 7 to bend outward while pushing the object to be fitted. C is inserted, and the engagement protrusion 7a of the elastic piece 7 reaches the position of the engagement groove 9 of the attached object C, so that the elastic piece 7 elastically returns to its original shape and enters the engagement groove 9. It is locked.

In this state, even if an attempt is made to pull out the attached body C from the joint, the side wall surface of the engagement groove 9 will be damaged by the engagement protrusion 7a of the elastic piece 7.
It cannot be pulled out because it is engaged with the base side surface 7'b.

The upper end portion of the side wall surface 9a on the side of the tip t of the engagement groove 9 is slightly chamfered, and the opposing side wall surface 9b is formed into an inclined surface shape to avoid interference with the elastic piece 7. Further, 10 is a seal installed in an annular groove provided on the outer circumferential surface of the object to be installed C.

Next, in order to pull out the attached body C, first rotate the lock cylinder B against the spring bias, so that the tip 7b of the elastic piece 7 is aligned with the inclined surface 7c of the end edge of the cylindrical body. The elastic piece 7 is bent so that its tip 7b rides up on the engaging part 5, and then the elastic piece 7 is The claw portion 7d is engaged by falling into the groove 5b of the engaging portion 5, and the lock cylinder B is locked in a resiliently biased state. In this state, the engaging convex portion 7a projects slightly inward of the cylindrical main body A.

When the object C is pulled out, the elastic piece 7 is removed so that the outer circumferential surface of the tip t of the object C that is connected to the side wall surface 9a on the side of the engagement groove 9 pushes out the engagement protrusion 7a. It is bent in the direction and pulled out. At this time, the elastic piece 7 is bent outward, so the pawl 7d protrudes from the groove 5b of the engaging part 5, and the lock is released, and the lock cylinder B is moved by the bias of the coil spring 3. A rotation is made. As the lock cylinder B rotates, the tip 7b of the elastic piece 7 moves from the state of riding on the engagement part 5 to the window hole 4 of the cylindrical body A.
The engaging convex portion 7 returns to the
The rotation of the lock cylinder B is stopped in a state where the lock cylinder a is engaged with the edge of the window hole 4 of the cylindrical body A. In this state, the engaging convex portion 7a of the elastic piece 7 is again projected inward of the cylindrical body A, and is in a state suitable for insertion and locking of the body C to be fitted.

In addition, the lock cylinder B is previously pressed against the cylindrical body A, and the claw portion of the elastic piece 7 is inserted into the concave groove 5b in the engaging portion 5 of the cylindrical body A, as shown in FIG. 7d may be locked and the object to be mounted C may be inserted into this. In this case, since the engaging convex portion 7a of the elastic piece 7 of the lock cylinder B is in a state in which the convex portion 7a slightly protrudes from the inner circumferential surface of the cylindrical main body A, the insertion of the attached object C is slight. This can be done with the force of pushing.

As the object C is pushed in, the convex portion 7a slightly protruding from the inner circumferential surface of the cylindrical body A is pushed outward, causing the elastic piece 7 to undergo elastic deformation. , this elastic piece 7
The claw portion 7d is released from the groove 5b of the lock cylinder B, and the lock cylinder B receives rotational bias from the spring 3.

When the object C is fully inserted into the joint, the lock cylinder B is rotated by the spring 3 to the position where it is dropped into the engagement groove 9 of the object C inserted through the window hole 4 of the cylindrical body A. automatically creates a locked state.

In addition, the elastic pieces 7 in the description include a pair of elastic pieces 7, 7 having a pair of claw parts 7d provided oppositely to each other, and a pair of elastic pieces 7, 7 provided facing each other between the elastic pieces 7, 7 having the claw parts 7d. Other elastic pieces 7, 7 without claws
An engaging portion 5 having a groove 5b is provided in the window hole 4 of the cylindrical body A in which the elastic piece 7 having the claw portion 7d is positioned, and the engaging portion 5 having the claw portion 7d is provided in the window hole 4 of the cylindrical body A. The window hole 4 in which the elastic piece 7 is positioned is provided with an engaging portion without the groove 5b.

(Effects) Since the joint according to the present invention is constructed as described above, by inserting an object to be attached such as a tubular body or a rod-shaped body having an annular engagement groove on the circumferential surface of the end,
The engagement convex portion of the elastic piece provided on the joint automatically engages into the engagement groove, and the attached object is connected with one touch, and the elastic piece is provided in a direction that bites into the engagement groove. It is safe because there is no risk that the attached object will come off.

Also, when disconnecting the connection, the lock tube is rotated against the spring bias, and the object to be attached is pulled out at the position where the rotated lock tube is locked and stopped.
This attached object can be easily extracted.
In addition, at the same time, the lock cylinder is released from its lock against the resilient force and returns to its original state where it can connect to the attached object, making attachment and detachment of the attached object easy and reducing the trouble of attaching and detaching operations. It has the advantage of requiring less. It also has the advantage of being able to be used repeatedly, both in terms of structure and material.

In addition, since it is made of plastic, the manufacturing cost is lower than that of metal, and it is also lightweight.
It has the feature of not rusting.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the joint according to the present invention, Fig. 2 is a cross-sectional view of the same when the joint is locked, Fig. 3 is a cross-sectional view of the same when the joint is unlocked, and Fig. 4 is a cross-sectional view of the same when the joint is unlocked. 5 is a front view showing an embodiment of the attached object, FIG. 6 is a front view of the joint body, FIG. 7 is a cross-sectional view of the same, and FIG. A partially sectional front view of the lock cylinder, and FIGS. 9A and 9B are sectional views thereof. A... Cylindrical body, B... Lock tube, C... Mounted object, a... Open end, s... Slit, 1...
Tsuba, 2...Rim Tsuba, 3...Spring, 4...Window hole, 4a
...Window edge, 5...Engagement portion, 5a...Slanted surface, 5b
... Groove, 6 ... Hole, 7 ... Elastic piece, 7a ... Engagement convex portion, 7b ... Free end, 7c ... Inclined surface, 7d
...Claw part, 7'...Concave part, 8...Small inner diameter part, 9...
...Engagement groove, 10...Seal.

Claims (1)

[Claims for Utility Model Registration] A cylindrical body made of plastic having an annular protrusion in the circumferential direction on the outside and a window hole for operation provided in the peripheral wall between the annular protrusions; A lock cylinder made of plastic is fitted between the annular convex portions of the cylindrical body and is biased toward one side in the circumferential direction; An elastic piece is provided in such a way that it faces in the axial direction of the lock cylinder and has an engaging protrusion on the inside of the tip protruding inward from the window hole of the cylindrical body; The edge of the window hole, which the elastic piece of the lock cylinder rotated against the bias comes into contact with, is provided with an engaging portion on which the tip side of the elastic piece of the rotated lock cylinder rides. A joint characterized in that the elastic piece resting on the joint part is engaged with the engaging part by slightly protruding an engaging convex part of the elastic piece inward of the cylindrical body.