JPH0226578Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a support structure for a square shaft-shaped rotating body used in a workpiece assembly jig, etc.

<Prior art> For example, in an automobile body assembly line, various positioning members are provided on each side of a square shaft-shaped rotating body as a jig for positioning panels according to many car models, and the rotating body is indexed. It's rotating. Conventionally,
The support structure for this rotating body is as shown in Figure 1.
A circular support shaft 2 is concentrically protruded from both ends of the rotating body 1,
This support shaft 2 is supported by a bearing 3 on both ends, and as shown in FIG. mechanism is used.

However, in the former case, the outer sides of the support parts at both ends cannot be used, and there are disadvantages in that the whole part becomes long and the load is received far from both ends. In this respect, the latter solves the above-mentioned problem, but the support part becomes large and a large-diameter bearing is required, resulting in problems in terms of space and cost.

<Purpose of the invention> The present invention belongs to the latter type of support for a rotating body, and is an improvement of the support mechanism to solve the conventional problems.

<Structure of the invention> The characteristic structure of the invention is that a rectangular shaft rotating body of the required length, on which a workpiece positioning jig is attached to each of its four surfaces, is divided into sections in a direction perpendicular to its axis. A flange having a hole concentric with the shaft center is fixed to the divided end face, and flanges having a convex portion that fits concentrically with the hole are formed on both end faces. Both flanges are bottle-bonded concentrically to the end face, and this support shaft is rotatably supported on the bearing box via a bearing.

<Example> An example of the present invention will be described below with reference to FIGS. 3 and 4. Reference numerals 1a and 1b are rotating bodies having a rectangular shaft shape, and in the illustrated example, a rectangular cylinder shape is used. In the present invention, the rotating body 1a at the center and the rotating bodies 1b at both sides are divided to form a rotating body having a required length.

A concave portion concentric with the axis is provided on the divided end faces of the divided rotating bodies 1a and 1b. In the case of the illustrated example, since it has a rectangular tube shape, when forming the recess, as shown in FIG.
It is provided by welding to the divided end face of 1b.

Reference numeral 8 denotes a support shaft of a circular shaft, which has a smaller diameter than the rotating bodies 1a and 1b. Flanges 9 are formed at both ends of the support shaft 8, and a convex portion 10 is provided on the end surface of the flange 9, which is concentric with the axis and fits into the hole 7. This support shaft 8 is connected to the rotating body 1
Fitting the convex portion 10 into the hole 7 between a and 1b,
Tighten the flanges 9 and 6 with bolts 11 to join the divided rotating bodies 1a and 1b together,
A support shaft 8 is supported by a bearing 12.

In FIG. 3, 14 is a bearing stand, and the bearing 12 is placed inside the bearing box 13 on this bearing stand 14.
hold. Reference numeral 15 denotes a cylinder for driving the indexing rotation of the rotating body, and the stroke of this cylinder 15 is converted into a rotational motion and transmitted to the support shaft 8 by a gear 16.

<Effects of the invention> According to the support structure of the invention described above, jigs can be attached to each surface on both sides of the bearing support part of the rotating body, which is an advantage of the conventional support structure shown in Fig. 2. In addition to satisfying all the advantages regarding supporting loads, the rotating body is divided into parts, a small-diameter support shaft is connected between the divisions, and the support shaft is supported by bearings. The support part is compact, which is advantageous in terms of space, and the use of small-diameter bearings has the advantage of reducing costs.

In addition, since the divided rotating body and the support shaft are connected by fitting concave and convex portions concentric with the shaft center, centering and positioning is easy, and alignment during disassembly and assembly is quick and easy. have.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams of the conventional support structure, Figure 3 is a side view of the support structure according to the present invention, and Figure 4 is the third
It is a figure-line sectional view. 1a, 1b...Rotating body, 7...Hole, 8...Spindle, 10...Protrusion, 12...Bearing.

Claims (1)

[Scope of utility model registration request] A rectangular shaft rotating body of the required length, on which a workpiece positioning jig is attached to each of its four faces, is divided into sections perpendicular to its axis, and a flange having a hole concentric with the axis is fixed to each divided end surface. A support shaft of a circular shaft having a smaller diameter than the rotary body, which has flanges on both end faces having convex portions that fit concentrically into the holes, is bottle-coupled between the split end faces of the rotary body, and the flanges are concentrically connected between the divided end faces of the rotary body. A support structure for a square shaft-shaped rotating body, characterized in that a support shaft is rotatably supported in a bearing box via a bearing.