JPS6141443Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a joint coupling device.

(Prior Art) In a conventional joint coupling device of this type, as shown in FIG.
13 is expanded outward, and the spherical portion 11 of the spherical pin 10 is fitted into the recess 14 of the joint 12.

(Problem to be Solved by the Invention) However, when a pull-out force acts on the spherical pin 10 in the F direction, the spherical portion 11 of the spherical pin 10 expands the lip portions 13 of the joint 12 outward, The spherical pin 10 had a problem of coming off from the joint 12.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a joint coupling device which is novel and simple in construction and which overcomes the above-mentioned drawbacks.

[Structure of the invention] (Means for solving the problem) In order to solve this problem, the following measures were taken in the present invention. That is, in a joint coupling device in which one end opening of a spherical recess of a joint made of an elastic material is expanded to fit the spherical part of a spherical pin into the spherical recess, the spherical part of the joint is attached to the terminal end of the spherical pin. an annular flange formed to have a larger diameter than the other end opening of the recess and a smaller diameter than the spherical diameter of the spherical pin; and an annular flange formed around the other end opening of the spherical recess of the joint. a lip that can abut and engage with the flange after the spherical pin and the spherical recess of the joint are fitted; and a predetermined lip that allows elastic expansion of the lip and allows the lip to pass through the flange. Annularly formed along the outer periphery of the lip at the periphery of the opening at the other end of the spherical recess so as to come into contact with the joint and prevent the lip diameter from expanding beyond the predetermined diameter. The present invention provides a joint coupling device comprising: a slit formed by a slit;

(Function) As described above, in the means of the present invention, an annular flange is provided at the end of the spherical pin, and the flange has a diameter larger than the other end opening of the spherical recess of the joint and a spherical shape of the spherical pin. They are formed with the same or smaller diameter. Therefore, after the spherical pin and the spherical recess of the joint are fitted, the lip provided in an annular manner around the opening at the other end of the spherical recess of the joint engages with the flange of the spherical pin, and the spherical recess of the joint engages with the lip of the spherical pin. This prevents the pin from falling out of the spherical recess of the joint.

Furthermore, even if a flange is provided on the spherical pin, there is no problem in fitting the spherical pin into the recess of the joint, as a lip that can be expanded is formed at the other end opening of the joint via the slit. .

(Example) In FIG. 2, 20 indicates a spherical pin, and the spherical pin 20 includes a main body 21, a seat portion 22, a flange portion 24 formed between the seat portion 22 and the spherical portion 23, and an annular It is integrally constructed of a flange 25 and a caulking seat 26 formed on the flange 25.

The joint 27 is made of an elastic material such as resin or rubber, and has a recess 28 into which the spherical portion 23 of the spherical pin 20 is inserted. Roiruritsu 29.29, which is formed as appropriate as possible in a manner as much as possible to the outside direction
A plurality of lower slits 30, 30 are appropriately formed in an annular shape on the outside of the lower lips 29, 29 to allow the outward expansion of the spherical pin 20, as shown in FIG. Time spherical pin 2
A plurality of upper lips 31 and 3 are appropriately formed in an annular shape in order to planarly engage the groove portion 25 of 0 and prevent the spherical pin 20 from coming off from the joint 27.
1, and when the spherical portion 23 of the spherical pin 20 is fitted into the recess 28 of the joint 27, the outer side of the upper lip 31, 31 is expanded outwardly by the insertion of the collar portion 25 of the spherical pin 20. The upper slits 32, 32 are integrally molded.

The operation of the present invention will be described below.

As shown in the third figure, insert the spherical pin 20 into the joint 27.
When inserted into the recess 28 of the spherical pin 20, the spherical portion 23 of the spherical pin 20 engages the lower lips 29, 29 of the joint 27.
expand outward, and further expand the spherical portion 2 of the spherical pin 20.
3 is inserted into the recess 28 of the joint 27, the collar 25 of the spherical pin 20 is inserted into the upper ring 3.
Expand 1.31 outward (Figure 4). That is, the diameter of the flange 25 is the same as or smaller than the diameter of the recess 28. When the spherical pin 20 is further pressed from the state shown in the fourth figure, the spherical portion 2 of the spherical pin 20
The spherical pin 2 shown in the second diagram has 3 inserted into the recess 28.
0 and the joint 27 are obtained.

However, even if a pull-out force acts on the spherical pin 20 in the direction F in FIG. The flat side surface 33 is the flat part 3 of the upper lip 31 of the joint 27.
4 and 34, the spherical pin 20 does not easily come out of the joint 27, and the spherical pin 20 and the joint 27 are integrally connected.

The width of the upper slits 32, 32 is such that the width of the lips 31, 31 is such that the collar portion 25 can be inserted therethrough.
It is formed to the extent that it can be expanded. Therefore, when the lips 31 are expanded outwardly enough to allow the flange 25 to be inserted, their outer peripheral surfaces meet the joint 27.
This causes further lip 3 to come into contact with the inner circumferential surface of the
The spread of 1.31 will be prevented. Therefore, even if the spherical pin 20 is excessively pressed into the recess 28 of the joint 27 during fitting, the lips 31 will not expand to the extent that the spherical portion 23 will pass through, and the spherical pin 20 will come out in the fitting direction. It never gets put away.

Further, even if the spherical pin 20 is pressed in the insertion direction after coupling, the spherical pin 20 will not come out of the recess 28, and in addition to the engagement of the flange 25, the spherical pin 20 will not come out from either opening side of the recess 28. will never fall out.

The shape of the outer end of the flange 25 of the spherical pin 20 and the open end side of the upper lips 31, 31 of the joint 27 is such that the outer end of the flange 25 is the upper lip 31, 3.
Even if the configuration is such that it bites into 1, the above-mentioned effect can be achieved.

In the embodiment described above, the lower lips 29, 29 and the lower slits 30, 3 of the joint 25 are
0, a plurality of upper lips 31, 31 and upper slits 32, 32 are appropriately formed in a ring shape, but the same effect can be achieved even if the lower lip, lower slit, upper lip, and upper slit are respectively arranged in a series in a ring shape. be able to.

[Effects of the invention] As described above, in the present invention, an annular flange is provided at the end of the spherical pin, and the flange has a larger diameter than the other end opening of the spherical recess of the joint, and the spherical pin It is formed as a smaller shape than the spherical shape. Therefore, after the spherical pin and the spherical recess of the joint are fitted,
A lip annularly provided on the periphery of the other end opening of the spherical recess of the joint abuts and engages with the flange of the spherical pin, thereby preventing the spherical pin from falling out of the spherical recess of the joint.

Furthermore, even if a flange is provided on the spherical pin, there will be no problem in fitting the spherical pin into the recess of the joint because a lip is formed that can be expanded through the slit to the opening at the other end of the joint. .

Further, the slit is formed so as to come into contact with the joint when the lip expands to a predetermined diameter that allows it to pass through the flange, thereby preventing the lip from expanding beyond the predetermined diameter. On the other hand, the flange is formed at the terminal end of the spherical pin to have a larger diameter than the other end opening of the spherical recess of the joint and a smaller diameter than the spherical diameter of the spherical pin. Therefore, even if the spherical pin is pressed too much against the joint during insertion, the lip will not expand to the extent that the spherical pin itself can penetrate, and the spherical pin will be securely inserted and retained within the joint recess. That will happen.

Furthermore, even after coupling, even if the spherical pin is pressed against the joint, the spherical pin will not fall out of the recess of the joint in the fitting direction. In other words, according to the present invention, a flange is provided on the spherical pin, and the opening at the other end of the joint recess is formed into an expandable lip so that the flange can penetrate. This has the advantage that there is no need to reduce the holding force of the spherical pin.

Furthermore, since the lip uniformly expands when the flange is penetrated, intensive elastic deformation of only a portion of the lip is avoided, thereby preventing permanent deformation or damage to the lip.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional joint coupling device.
Figure 2 is a sectional view of the joint coupling device of the present invention;
3, 4, and 5 are cross-sectional views illustrating the operation of the device of the present invention. 10/20: Spherical pin, 11/23: Spherical part,
12/27: joint, 14/28: recess, 2
5: Tsuba, 31.31: Upper lip, 32.
32: Atsupasuritsuto.

Claims (1)

[Claims for Utility Model Registration] In a joint coupling device in which one end opening of a spherical recess of a joint made of an elastic material is expanded to fit a spherical portion of a spherical pin into the spherical recess, the spherical pin is an annular flange formed at the terminal end with a larger diameter than the other end opening of the spherical recess of the joint and a smaller diameter than the spherical diameter of the spherical pin; and at the periphery of the other end opening of the spherical recess of the joint. a lip that is provided in an annular shape and can abut and engage with the flange after the spherical pin and the spherical recess of the joint are fitted; an opening at the other end of the spherical recess along the outer periphery of the lip so that when the lip expands to a predetermined diameter that allows the lip to pass through, the lip contacts the joint and prevents the lip from expanding beyond the predetermined diameter; A joint coupling device comprising: a slit annularly formed on the periphery;