JPH04181019A - Bearing holding device - Google Patents

Abstract

PURPOSE:To simplify the assembling work of a bearing and to take measures to cope with its automatic assembling by providing the outer periphery of a cylindrical part of the bearing with two projective detents which can be received in two adjacent corner parts of the square groove of a box-shaped bearing holding section. CONSTITUTION:A bearing 1 has a bearing supporting hole 1a through which a shaft 2 slides, a cylindrical part 1b which is concentric to the hole 1a and has the diameter designated by A, a flange 1c which is provided at the one end of the cylindrical part 1b to control the thrust of the bearing 1, and the cylindrical part 1b is provided with two projective detents 1d. The shaft 2 is rotatably inserted in the shaft supporting hole 1a of the bearing 1. Even when the detent 1d turns into any position in the case of setting the shaft 2 and the bearing 1 in a bearing holding section 3, the detent 1d always settles automatically within a square domain having each side designated by A of the bearing holding section 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a bearing holding device for positioning a bearing by dropping it into a square groove-shaped bearing holding portion.

[Prior Art] Generally, in a device having a mechanism for rotating a shaft,
bearings are used.

In a conventional bearing holding device, for example, as shown in FIG.
0a, a cylindrical portion 10b that is concentric with the hole 10a and has a diameter of A, a flange 10c provided at one end of the cylindrical portion 10b, and a protrusion 1 provided on the outer periphery of the cylindrical portion 10b. It has two detents 10d.

The bearing holding part 11 that holds the bearing in the device housing is a square groove with one side having a length of A, and the cylindrical part 10b of the bearing 10 through which the shaft 14 is passed is inserted into the groove of the bearing holding part 11. When it is fitted and the presser member 12 is fixed from the top with the screws 13,
The cylindrical portion 10b of the bearing 10 is fitted vertically and horizontally by the bearing holding portion 11 and the pressing member 12, and the bearing 10 is also restricted in the thrust direction by the flange 10c of the bearing 10.

Further, as shown in FIG. 8, the detent 10d fits in the corner of the bearing holding part 11, prevents the bearing 10 from sliding with respect to the holding part 11, and prevents the bearing 10 and the shaft 14 from sliding against the device housing.
The housing is configured such that it slides between the bearing 10 and the shaft 14, but does not slide between the housing and the bearing 10.

[The invention attempts to solve i! U] However, in the conventional example described above, when the shaft 10 passed through the shaft 14 is dropped into the bearing holding part 11, a slight adjustment is made so that the detent 10d is located at the corner of the groove of the bearing holding part 11. The problem is that it is necessary.

For example, as shown in FIG. 9, if the detent lOd is located directly below the bearing 10, it is necessary to turn the bearing 10 approximately 45 degrees to the left or right and bring the detent IDd to the corner of the groove. be. Also, if you forcefully fix the holding member 12 in the state shown in Fig. 349, the bearing 1
Failures such as the shaft 14 being damaged, the shaft 14 being displaced, and the slidability of the shaft 14 being reduced may occur. - Also, in recent years, automation has developed and automatic assembly of devices has been actively introduced. At that time, the above-mentioned adjustment requires a complicated mechanism and is time-consuming, which poses a major obstacle.

The present invention aims to solve the above problems. That is, an object of the present invention is to provide a bearing holding device in which the detent is placed in a predetermined position by simply dropping the bearing into the groove of the bearing holding portion, and the adjustment of the direction of the bearing can be omitted. It is something.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a bearing holding device for positioning a bearing by dropping it into a square groove-shaped bearing holding portion. It has a cylindrical part that is concentric with the axis and fits into the square, and the outer periphery of the cylindrical part has two adjacent parts of the square when the cylindrical part is fitted into the square. It has two protruding detents that fit into the corners.

[Function] According to the present invention, the cylindrical portion of the bearing is provided with two protruding detents that fit into two adjacent corners of the square groove of the bearing holding portion of the device housing. Therefore, simply by dropping the bearing into the groove of the bearing holding part, the rotation stopper is placed in a predetermined position, and adjustment of the direction of the bearing can be omitted.

[Embodiment] Figures 1 to 3 show a first embodiment of the present invention.

In Figure 341, 1 is a bearing, 2 is a shaft, 3 is a bearing holding part, 4 is a holding member, and 5 is a screw.

The bearing 1 has a shaft support hole 1a in which the shaft 2 slides,
There is a cylindrical part 1b that is concentric with the hole 1a and has a diameter of A, and there is a flange IC provided at one end of the cylindrical part 1b to regulate the thrust of the bearing 1. Two 1d are provided. The shaft 2 is passed through the shaft support hole 1a of the bearing 1, and is rotatable.

The bearing holding part 3 is a square groove with one side A, which is provided at the end of a flat plate.The cylindrical part 1b of the bearing 1, through which the shaft 2 is passed, is dropped into the groove of the bearing holding part 3, and the holding member 4 is inserted into the groove. Screw 5 from above
When fixed, the cylindrical portion 1b is surrounded by a square area with one side A, and as shown in FIG. The positional relationship between the holding part 3 and the shaft 2 can be obtained. The bearing 1 is also restricted in the thrust direction by the flange IC of the bearing 1.

The rotation stopper 1d of the bearing 1 is for allowing rotation between the bearing 1 and the shaft 2, but preventing rotation between the bearing 1 and the bearing holding part 3. 2 detents 1
The size and position of d are such that when the cylindrical portion 1b of the bearing 1 is placed in a square area with one side A, it fits in each corner of the adjacent square, as shown in Fig. 2. The angle B between the two detents 1d centered on the center of the shaft 2 is 90 degrees.

When the shaft 2 and the bearing 1 are dropped into the bearing holding part 3, no matter how the detent 1d is, it will not work as shown in FIG. 3(a).
As shown in (b), (c), and (d), the detent 1d automatically and without fail falls within the square area of one side A of the bearing holding portion 3.

In the first embodiment described above, the flange IC was provided at one end for positioning the bearing 1 in the thrust direction, but it may be provided at both ends.

FIG. 4 shows a second embodiment of the invention.

In this second embodiment, the bearing 1 is not provided with a flange, but the bearing holding portion 3 is provided with a flange portion 3a for thrust stop.

FIG. 5 shows a third embodiment of the invention.

That is, in FIG. 5, although the detent provided on the bearing 1 is not specifically illustrated, the shape of the detent is in the area 1d' indicated by parallel diagonal lines in the figure, so the detent within this area is The shape of the protruding flap is not limited.

FIG. 6 shows a fourth embodiment of the invention.

In this fourth embodiment, two detents 1d are attached to the flange 1.
It is provided in a protruding shape from c toward the outer periphery of the cylindrical portion 1b. Even in this case, similar effects can be obtained.

In FIGS. 1 and 2, the holding member 4 is fixed with a screw 5, but a spring-like member may be used to hold down the shaft 2 and the bearing 1. It is also conceivable to use the force of pressing the thermal head against the platen roller. Also, stopper 1
The size of d in the bearing thickness direction may also be changed in design as necessary.

[Effects of the Invention] As explained above, according to the present invention, two adjacent square grooves of the bearing holding portion of the housing are formed on the outer periphery of the cylindrical portion of the bearing.
There are two protruding detents that fit into each corner, so just by dropping the bearing into the bearing holder, the detents will fall into place, simplifying the work and facilitating automatic assembly. This also has the effect of being relatively easy to deal with.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the first embodiment of the present invention;
The figure is also an assembled front view, FIG. 3(a). (b), (c), and (d) are explanatory diagrams of the operation, FIG. 4 is an assembled front view showing the second embodiment of the present invention, and FIG. 5 is a third embodiment of the present invention. FIG. 6 is a perspective view showing only the bearing of the fourth embodiment of the present invention.
FIG. 7 is an exploded perspective view showing an example of the conventional technology, FIG. 8 is an assembled front view, and FIG. 1...Bearing 1a...Shaft support hole 1b...
Cylindrical part 1c...flange ld...rotation stop ld'...area 2...shaft 3...
・Bearing support part 3a...flange part 4 river holding member 5
...Screw and 4 others Figure 1 Figure 5 Qdfob

Claims (1)

[Claims] 1. In a bearing holding device for positioning a bearing by dropping it into a square groove-shaped bearing holding part, the bearing has a cylindrical part that is concentric with the shaft to be supported and fits into the square, and , a bearing characterized in that the outer periphery of the cylindrical portion has two protruding detents that fit into two adjacent corners of the square when the cylindrical portion is fitted into the square. holding device.