JPH04275849A - Joint device - Google Patents

Abstract

PURPOSE:To fix two joint members at an accurate position angle and reduce the aged deterioration of joint device. CONSTITUTION:A locking plate 30 is fixed at a specified interval from the first joint member 10, and V-shaped grooves 22a to 22d are provided to the second joint member 20, and piramid-like projections 32a to 32d which can be fitted to the V-shaped grooves are provided on the surface of the lock plate on the side of the second joint member. Instead of the V-shaped grooves and the above mentioned piramid-like projections, the combination of conic holes and V-shaped grooves and the combination of the conic projection and piramid- like projection are used respectively.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a jig that can repeatedly fix a workpiece and a processing device at an accurate position and angle.
The present invention relates to a coupling device that coaxially arranges two coupling members, such as a holder, and couples them via an elastic locking plate so that the two coupling members cannot rotate relative to each other.

0002

2. Description of the Related Art A coupling device for arranging two coupling members coaxially and coupling them so that they cannot rotate relative to each other via an elastic locking plate is disclosed in Japanese Patent Laid-Open No. 60-8
The one shown in No. 0535 is known.

[0003] In this conventional example, as shown in FIG.
A locking plate 130 is connected to the coupling member 110 at a distance,
A hole 131 surrounding the tongue 111 is provided on the locking plate 130 at a position corresponding to the tongue 111.

In this conventional example, two coupling members 11
0 and 120 are tightened by clamp bolts (not shown) and supported by projections 121, thereby being coupled together.

[0005]

[Problems to be Solved by the Invention] In the above conventional example, although the workpiece can be fixed at an accurate position and angle with respect to the processing device, the tongue 111 and the hole 131 are in a positional relationship that perfectly matches each other. Since the locking plate 130 is rarely processed like this, as shown in FIG.
The contact surface A between the two
becomes smaller. That is, the locking plate 130 and the tongue 111
There is a problem in that the contact surface A becomes close to a point contact or a line contact, and the contact surface A is worn or elastically deformed, resulting in looseness during use.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a coupling device which can fix two coupling members at accurate positions and angles and which exhibits little deterioration over time.

[0007]

[Means for Solving the Problems] The present invention fixes a locking plate to a first connecting member at a predetermined interval, provides a V-groove in the second connecting member, and provides a surface of the locking plate on the second connecting member side. A pyramid-shaped projection corresponding to the V-groove is provided on the top. Further, in the present invention, a combination of a conical hole and a V groove is used instead of the V groove, and a combination of a conical projection and a pyramidal projection is used instead of the pyramidal projection.

[0008]

[Embodiment] FIG. 1 is an explanatory diagram of an embodiment of the present invention.
FIG. 3 is a perspective view showing a state before two coupling members are coupled.

In this embodiment, the first coupling member 10 and the second coupling member 20 are arranged coaxially, and the two coupling members 10 and 20 are prevented from relative rotation via the elastic locking plate 30. It is designed to be combined with

FIG. 2 is a bottom view of the first connecting member 10 before the locking plate 30 is fixed to the first connecting member 10 in the above embodiment, and FIG. 3 is a bottom view of the locking plate 30 in the above embodiment.
FIG. 4 is a plan view of the second coupling member 20 in the above embodiment. Further, FIG. 5 is a longitudinal cross-sectional view when the first coupling member 10 and the second coupling member 20 are coupled in the above embodiment, and is a longitudinal cross-sectional view when cut along the line V-V shown in FIG. It is a front view.

The first coupling member 10 has protrusions 11a and 11 on its lower surface for fixing the locking plate 30, as shown in FIG.
b, 11c, and 11d are provided, and a through hole 13 is provided in the center thereof.
is provided. Hole 12 is a hole into which a clamp bolt CB is inserted.

As shown in FIG. 3, the locking plate 30 has through holes 31a, 31b, 31c, and 31c at positions corresponding to the protrusions 11a, 11b, 11c, and 11d of the first coupling member 10, respectively.
31d are provided, and pyramidal projections 32a, 32b are provided radially.
, 32c, and 32d, and a through hole 33 is provided in the center thereof.

The pyramidal projections 32a to 32d are examples of locking protrusions provided on the surface of the locking plate 30 facing the second coupling member, and the through hole 33 is a hole through which the clamp bolt CB is inserted. be.

On the other hand, on the upper surface of the second coupling member 20, a fourth
As shown in the figure, a protrusion 21 is provided in the center, a tapped hole 21a is provided in the center of the protrusion 21, and a V-groove 2
2a, 22b, 22c, and 22d are provided in a cross shape. Each of the protrusions 11a to 11d of the first coupling member 10 has a tip surface B processed to have highly accurate flatness so as to firmly abut with the second coupling member 20.
have. Further, as shown in FIG. 5, a locking plate 30 is fixed to the intermediate part of the protrusion 11a of the first coupling member 10 by riveting or the like, and the protrusions 11a, 11b, 11c, and 11d are similarly fixed to the intermediate part of the protrusion 11a. A locking plate 30 is fixed to the plate 30 by rivets or the like.

The clamp bolt CB and the tapped hole 21a of the second coupling member 20 are examples of clamping means for coupling the first coupling member and the second coupling member via the locking plate. The V grooves 22a to 22d are locking recesses provided on the surface of the second coupling member facing the locking plate, and are examples of locking recesses that engage with the locking protrusions. In addition, the first coupling member 1
The riveting or the like for fixing the locking plate 30 to the intermediate part of the projection 11a of 0 is performed so that the locking protrusion urges the locking recess when the first and second coupling members are connected. This is an example of a fixing means for fixing the above-mentioned locking plate to the intermediate portion of the plate.

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

First, the protrusions 11a to 11d of the first coupling member
As shown in FIG. 1, with the locking plate 30 fixed to the
The first coupling member 10 is brought closer toward the second coupling member 20, and the side surfaces of the pyramidal projections 32a to 32d are aligned with the second coupling member 20.
The first coupling member 10 is brought close to the second coupling member 20 to a position where it contacts the side surfaces of the V grooves 22a to 22d provided above.

The locking plate 30 maintains a flat plate state before the first connecting member 10 and the first connecting member 20 are connected.
When the first coupling member 10 is brought closer toward the second coupling member 20, each of the pyramidal projections 32a to 32d is
Since the grooves 22a to 22d are biased and the locking plate 30 has elasticity, the locking plate 30 is elastically deformed, and then the tips of the protrusions 11a to 11d of the first coupling member 10 are attached to the second coupling member 20. comes into contact with the top surface of Protrusion 11a of first coupling member 10
The tip of ~11d contacts the upper surface of the second coupling member 20,
FIG. 6 shows a portion of the locking plate 30 in an elastically deformed state.

In the above embodiment, the pyramidal projection 32a
Even if ~32d and the V grooves 22a to 22d are not machined in a perfectly matching positional relationship, the locking plate 30 is elastically deformed and the pyramidal projections 32a to 32d follow the V grooves 22a to 22d. Pyramidal projections 32a to 32d and V grooves 22a to 2
The fitting position with 2d can be fixed at an accurate position and angle as a whole, and the contact area between the pyramidal projections 32a to 32d and the V grooves 22a to 22d can be made sufficiently large. Furthermore, if a tolerance is provided for the slightly shallower depth of the V grooves 22a to 22d, the locking plate 30 will be elastically deformed in the same way as described above, so there will be a machining error in the depth direction of the V grooves 22a to 22d. There is no problem even if this occurs.

On the other hand, regarding the positional relationship of the two coupling members 10 and 20 along the axial direction, the tip surfaces B of each of the protrusions 11a to 11d that hold the locking plate 30 form a surface orthogonal to the axis. Since they are finished to have highly accurate flatness, the first coupling member 10 and the second coupling member 20 abut snugly without being inclined. Also in this direction, the position can be fixed at an accurate angle. For this reason, when the first coupling member 10 and the second coupling member 20 are coupled, the coupling is performed with high precision and excellent reproducibility, and the above-mentioned deterioration over time is small.

[0021] In the above embodiment, the first coupling member 10
Although four protrusions 11a to 11d are provided, it is sufficient that the number of protrusions is at least three.

FIG. 7 is a bottom view of the locking plate 50 in a second embodiment of the present invention, and FIG. 8 is a plan view of the second coupling member 40 in the second embodiment.

In this second embodiment, the first coupling member 1
0 is similar to the embodiment shown in FIG.
The bottom view of the coupling member is also the same as FIG. 2. Further, the first coupling member 10 and the second coupling member 40 are coupled by the clamp bolt CB.

In the second embodiment, the locking plate 50 has elasticity and has a pyramidal projection 5 on its lower surface, as shown in FIG.
2a and a conical protrusion 52b, the second coupling member 4
As shown in FIG. 8, a V-groove 42a and a conical hole 42b are provided on the upper surface of the 0. Further, the pyramid-shaped projection 52a and the conical projection 52b provided on the locking plate 50 correspond to the pyramid-shaped V groove 42a and the conical hole 42b of the second coupling member 40, respectively.
It corresponds to the location.

Note that the pyramidal projection 52a and the conical projection 52
b is an example of a locking convex portion provided on the surface of the locking plate facing the second connecting member, and the V groove 42a and the conical hole 42b are an example of the locking convex portion provided on the surface of the locking plate facing the second connecting member. This is an example of a locking recess provided on a surface that engages with a locking protrusion.

As in the second embodiment, by realizing the locking portions with a minimum number of configurations, each locking portion cooperates to determine the position, so that both the concentricity and angular runout accuracy with respect to the axis are improved. Accurate accuracy can be obtained.

Note that in the second embodiment, the locking plate 50
Although one pyramidal projection 51 and one conical projection 52 are provided, two or more of these projections may be provided.

[0028]

According to the present invention, it is possible to fix two connecting members at an accurate position and angle, and there is an effect that deterioration over time is small.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and is an explanatory diagram showing a state before two coupling members are coupled.

FIG. 2 is a bottom view of the first coupling member 10 before fixing the locking plate 30 in the above embodiment.

FIG. 3 is a bottom view of the locking plate 30 in the above embodiment.

FIG. 4 is a plan view of the second coupling member 20 in the above embodiment.

5] In the above embodiment, the first coupling member 10 and the second
FIG. 4 is a vertical cross-sectional view taken along the line V-V shown in FIG. 3 when the connecting member 20 is connected.

[Fig. 6] In the above embodiment, the first coupling member 10 and the second
FIG. 3 is a cross-sectional view showing a state in which the locking plate 30 is elastically deformed when the connecting member 20 is connected.

FIG. 7 is a bottom view of a locking plate 50 in a second embodiment of the present invention.

FIG. 8 is a plan view of the second coupling member 40 in the second embodiment.

FIG. 9 is a vertical cross-sectional view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10... First coupling member, 11a-11d... Protrusion, 20, 40... Second coupling member, 22a-22d, 42a... V groove, 30, 50... Locking plate, 32a-32d, 52a... Pyramid-shaped protrusion, 42b ...conical projection, 52b...conical groove.

Claims (3)

[Claims] 1. A coupling device in which two coupling members, a first coupling member and a second coupling member, are arranged coaxially and the two coupling members are coupled via an elastic locking plate, comprising:
a clamping means for coupling the first coupling member and the second coupling member via the locking plate; at least three protrusions provided on a surface of the first coupling member facing the second coupling member; at least two protrusions provided on the surface of the locking plate facing the second coupling member;
a locking recess provided on the surface of the second coupling member facing the locking plate, the locking recess engaging with the locking projection; and the first coupling fixing means for fixing the locking plate to an intermediate portion of the protrusion so that the locking protrusion urges the locking recess when the member and the second coupling member are combined; A coupling device characterized by: 2. In claim 1, the locking convex portion comprises:
At least three pyramidal convex portions, and the locking concave portion is
A coupling device characterized in that it is a V-groove that fits into the pyramid-shaped convex portion. A coupling device comprising: 3. In claim 1, the locking convex portion comprises:
The locking recess is comprised of at least one conical projection and at least one pyramidal projection, and the locking recess is fitted with the conical recess that fits with the conical projection and with the pyramidal projection. V
A coupling device comprising a groove.