JPH0242621B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a block jig in which jig elements such as angles and clamps for positioning and attaching a workpiece to a machine tool are combined and fixed in a block manner on a surface plate. Regarding equipment.

[Conventional technology]

Conventionally, as this type of block jig device, the fifth
A configuration as shown in the figure is known. That is, a surface plate 1 made of a thick metal plate is provided with reamed holes 1a and screw holes 1b alternately at a constant interval, and on this surface plate 1, for example, an L-shaped angle 2 is placed and , insert the bolt 3 into the through hole 2a drilled in the L-shaped angle 2, and insert the bolt 3 into the screw hole 1b of the surface plate 1.
It is screwed on. Then, place the L at a predetermined position on surface plate 1.
In order to accurately fix the shaped angle 2, positioning pins 4 are inserted into both the reamer holes 2b provided on both sides of the through hole 2a and the reamer hole 1a of the surface plate 1, respectively. Furthermore, the standing portion 2 of the L-shaped angle 2
A reamer hole 2d and a screw hole 2e are also provided in c.
This is a surface plate to which other jig elements such as angles are fixed.

[Problem that the invention seeks to solve]

In such a conventional block jig device, in order to position and fix the surface plate 1 and the L-shaped angle 2, positioning pins 4 are installed in the reamed holes 1a and 2b of the surface plate 1 and the L-shaped angle 2, respectively. There was a problem that two wires had to be inserted, and this attachment/detachment work was troublesome. Moreover, in order to accurately position the two, it is necessary to improve the accuracy of both the inner surfaces of the reamer holes 1a and 2b and the circumferential surfaces of the positioning pins 4. Therefore, reaming processing that requires advanced technology is required. Since all of the large number of reamed holes 1a and 2b are subjected to jig boring, it is extremely expensive and takes a long time to manufacture.
Furthermore, since the reamed holes 1a and the screw holes 1b are provided alternately, there are many problems such as the pitch dimension of the fixable positions becomes long.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a block jig device that has a simple structure, improves positioning accuracy, and is easy to manufacture.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
1 and 2, a surface plate 10 made of a thick metal plate has a plurality of screw holes 10a arranged at regular intervals. Then, on the surface 12 (upper surface in the figure) of this screw hole 10a which is joined to a jig element 11 which will be described later, a mortar-shaped recess 10b is continuously formed, each expanding upwardly. There is. Further, an annular body 16 having an inner diameter smaller than the outer diameter of the steel ball 13 is disposed on the joint surface 12 side of the recess 10b. This annular body 16 is made of a synthetic resin having elasticity and relatively high hardness, such as urethane rubber, and uses an O-ring having a circular cross section as shown in the figure. Moreover, the cross-sectional diameter dimension of the annular body 16 has small variations throughout the country. If the variation in diameter is large, there will be a shift between the center of the annular body 16 and the center of the recess 10b when the annular member 16 is placed in the recess 10b, resulting in poor positional accuracy. In order to improve the positional accuracy, it is necessary to arrange the annular body 16 parallel to the joint surface 12, and furthermore, it is necessary to increase the circularity of the recess 10b, and the recess 10b has a relatively high precision. Cutting or polishing is applied.

On the other hand, the jig element 11 is composed of, for example, L-shaped or V-shaped angles, V blocks, clamps, etc., and the jig element 11 has the recess 1
Approximately mortar-shaped taper holes 11a are provided on both sides of through-holes 11c through which bolts 15 are inserted, which are positioned corresponding to at least two of the holes 0b. Further, a steel ball 13 is fitted into the tapered hole 11a so that its tip side protrudes from the joint surface 12, thereby forming a protruding positioning member. At this time, it is desirable that the protrusion dimension of the steel ball 13 from the joint surface 12 is set to such an extent that the annular body 16 is slightly deformed in the fixed state as shown in FIG. A locking plate 14 is press-fitted into a stepped portion 11b formed around the opening side of the tapered hole 11a to hold the steel ball 13 so as to prevent it from coming off the jig element 11. The locking plate 14 is made of an elastic metal plate formed into a substantially annular shape, has an inner diameter smaller than the outer diameter of the steel ball 13, and has an outer peripheral edge bent at a predetermined angle. Then, the steel ball 13 is inserted into the tapered hole 1.
1a, by press-fitting the locking plate 14 from the joint surface 12 side as shown in the figure, the outer peripheral edge of the locking plate 14 expands in the downward direction as shown in the figure, and movement is prevented. blocked. In addition to using the above-mentioned locking plate 14, any means for preventing the steel ball 13 from coming off may be used.

[Effect]

When positioning and fixing the jig element 11 on the surface plate 10, move the jig element 11 and place it on the surface plate 1.
The distal end sides of a pair of steel balls 13 protruding from the jig element 11 are mounted on the inner diameter side of the annular body 16 disposed in the recess 10b. Then, the through hole 11 of the jig element 11
The bolt 15 is inserted into the screw hole 10a and screwed into the screw hole 10a located in the center between the two screw holes 10a as shown in FIG. If there is a positional shift between them during this process, when the tips of the two steel balls 13 try to fit into the respective recesses 10b, the state in which both steel balls 13 are stably placed on the annular body 16, i.e. The center of the steel ball 13 and the center of the annular body 16 are forcibly displaced so that they are aligned. On the other hand, the positional relationship between the two steel balls 13 and the jig element 11 is such that the rear end side of the steel balls 13 is pressed against each tapered hole 11a, so that the steel balls 13 are in the most stable state, that is, in the tapered hole 11a. The center of the steel ball 13 is fixed at the same position as the center of the steel ball 13. As a result, the jig element 11
The jig element 11 is displaced so that the centers of the taper hole 11a, the steel ball 13, the annular body 16, and the recess 10b of the surface plate 10 coincide with each other, and are fixed while being accurately positioned. The joint surface 12 between the surface plate 10 and the surface plate 10 is brought into close contact with each other. Furthermore, even if there are variations in the protruding dimensions of the steel balls 13 from the joint surface 12, the annular body 16
It is absorbed by its elasticity.

[Other Embodiments] FIG. 3 shows an example in which the recess 10b formed in the surface plate 10 is rectangular, and the annular body 16 is formed in the recess 10.
It fits in contact with the inner circumferential surface and bottom surface of b. In this example as well, the operation is similar to the previous example.

FIG. 4 shows still another embodiment of the present invention, in which the steel ball 1 of the above-mentioned example is used as a positioning protrusion member.
3, a protruding member 17 having a substantially conical tip and rear end is inserted into the tapered hole 1 of the jig element 11.
1a. Furthermore, the recess 10b of the surface plate 10
A substantially funnel-shaped annular body 18 is disposed in the center. In this example, as well as the example shown in FIG. When inserted, the centers of both will align and be positioned and fixed.

In the embodiments shown in FIGS. 1 to 4 described above, a positioning protrusion member consisting of a pair of steel balls 13 or a protrusion member 17 is provided on the jig element 11 side. Although not shown, surface plate 1
0 side, and the recess 10b is provided on the jig element 11.
It may be provided on either side; in short, any structure may be used as long as it is provided on either side and can be relatively positioned.
It goes without saying that the shape of the annular body 16 may also be modified into other shapes, such as an annular shape with a square cross section, as long as the inner diameter portion that contacts the positioning protrusion is concentric with the center of the recess 10b.

[Effects of the Invention] According to the present invention described above, a pair of positioning protrusions are brought into contact with the annular bodies disposed in two predetermined recesses, and a bolt is screwed into the other screw hole. Since the two members are joined together, the annular body causes the two positioning protrusions to move toward the center of each other, thereby further improving the accuracy of positioning the jig element with respect to the surface plate. Furthermore, when the positioning protrusion members come into contact with the annular body and press it, the two positioning protrusion members move to the closest part between the two annular bodies and narrow the annular body, which further improves the fixing position accuracy. improves. In addition, since the annular body has elasticity, even if there are variations in the protrusion dimension of the positioning projection member from the joint surface or the depth of the recess, this is absorbed, so that the jig element and the surface plate are brought into close contact with each other. This prevents the jig element from being fixed at an angle.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a perspective view showing the positioning protrusion member, the annular body and the recess, FIG. 3 is a sectional view of essential parts showing another embodiment of the invention, and FIG. 4 is a sectional view showing still another embodiment of the invention. , FIG. 5 is an exploded perspective view showing a conventional example. 10...surface plate, 10a...screw hole, 10b...recess,
11...Jig element, 11a...Tapered hole, 12
...joint surface, 13... steel ball (positioning protrusion member), 15... bolt, 16... annular body, 17... protrusion member (positioning protrusion member), 18... annular body.

Claims (1)

[Scope of Claims] 1. A jig device for positioning between two members consisting of a jig element such as an angle or a clamp or a surface plate, wherein one of the two members has a screw hole on the joint surface side. A plurality of recesses are arranged at regular intervals on the joint surface side of the screw hole, and a pair of positioning protrusions are protruded from the other member so as to correspond to the recesses. , a through hole is formed between the pair of positioning protrusions, the distal end of the positioning protrusion is formed into a spherical or substantially conical shape, and the recess has an inner diameter smaller than the outer dimension of the positioning protrusion. an annular body having elasticity of a certain dimension is disposed, and the elastic body is brought into contact with the distal end sides of the positioning protrusion members to position the two members; A block jig device characterized in that the two members are joined by screwing into the hole.