JPH05139552A - Bearing mechanism for idle lever shaft - Google Patents

Abstract

PURPOSE:To facilitate removal of an idle lever shaft without removing a bearing by providing a integratedly-formed bearing part having a claw to a side frame in a bearing structure in a paper feed device of a printing device. CONSTITUTION:An idle lever shaft 3 is provided normal to a side frame 5 of a paper feeding device made of resin, and a bearing part to support both ends of this idle lever shaft 3 is made of resin, and formed in an integrated manner with the side frame 5. One of bearings 8 of the side frame 5 is provided in a cup shape, and another bearing part 4 is of U-shape so that the idle lever shaft 3 may be regulated in the circumferential direction. A claw 6 which is elastically deformable is provided in the axial direction of the idle lever shaft 3 facing toward a groove part from an opening part of this U-shaped bearing part, regulating coming-off of the idle lever shaft 3 from the opening part, and facilitating removal of the idle lever shaft 3 by pushing the claw 6 in the direction C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device mounted on a printing device, and more particularly to a bearing structure of the sheet feeding device.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to the drawings.

FIG. 4 is a bottom view of a conventional sheet feeding device, FIG. 5 is a side sectional view thereof, FIG. 6 is a perspective view thereof, and FIG. 7 is a longitudinal sectional view thereof.

The conventional bearing structure is composed of left and right frames 105 made of steel, a pair of bearings 104, and an idle lever shaft. The idle lever shaft is fitted into the shaft support portion of the bearing 104 to make a steel frame. The small-diameter portion 104a of the bearing 104 is fitted in the groove formed in the bearing 105, the bearing 104 is rotated, and the protrusion on the piece extending from the main body of the bearing 104 is inserted into the hole B of the frame 105 to fix the bearing 104. It was attached to the frame 105 via 104.

To remove the idle lever shaft 103, the protrusion of the bearing 104 is removed from the hole B of the frame 105, and the bearing 1
The bearing 104 was removed from the groove of the frame 105 by rotating 04.

[0006]

However, in the bearing structure of such a sheet feeding device, when the idle lever is removed, the bearing 104 has to be removed from the frame 105, which complicates the work and the bearing. Since there are two 104's, there is a drawback that it is costly.

Therefore, it is an object of the present invention to form the bearing 104 integrally with the side frame to reduce the cost and facilitate the attachment / detachment.

[0008]

In the bearing structure of the present invention, the bearing portions supporting both ends of the shaft are integrally formed with the side frame of the apparatus. One of the bearings has a cup shape that receives one end of the idle lever shaft, and the other of the bearings has a U shape in which the other end of the idle lever shaft is perpendicular to the idle lever shaft. It is characterized in that an elastically deformable claw is provided from the opening of the U-shaped bearing portion toward the groove portion.

[0009]

In the bearing structure thus constructed, the claws 6 can be elastically deformed, so that during assembly, the idle lever shaft 3 is removed from the claws 6 and is supported by the U-shaped groove.
From the opening of the character-shaped bearing portion to the groove portion (direction a), push the claw 6 with the idle lever shaft (direction c). The claw 6 moves away from the idle lever shaft 3 and returns to the elastic direction,
The tip of the pawl 6 prevents the idle lever shaft 3 from coming off from the groove of the U-shaped bearing.

On the contrary, when removing the idle lever shaft 3,
A force (direction c) is applied to the pawl 6 to elastically deform the pawl 6 beyond the end surface of the idle lever shaft 3. At this time, the idle lever shaft 3 prevents the U-shaped bearing portion from coming off from the groove portion (d.
Direction), the idle lever shaft 3 can be removed from the bearing portion (direction d).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the bearing structure of the present invention, FIG. 2 is a sectional view of the same side, and FIG. 3 is a perspective view thereof.

The idle lever shaft 3 is perpendicular to the side frame 5 of the paper feeding device made of resin. The bearing portion that supports both ends of the idle lever shaft 3 is made of resin,
It is formed integrally with the side frame 5. One bearing 8 of the side frame 5 is provided in a cup shape, and the other bearing portion 4 is U-shaped so that the idle lever shaft 3 can be restricted in the circumferential direction. A claw 6 that is elastically deformable in the axial direction of the idle lever shaft 3 is provided from the opening of the U-shaped bearing portion toward the groove, and the idle lever shaft 3 is provided in the upward direction of the U-shaped bearing portion, that is, the opening. It is regulated not to get out of the club.

With this structure, one end of the idle lever shaft 3 is inserted into the cup-shaped bearing 8 provided on the side frame 5 already assembled when the idle lever shaft 3 is attached. The idle lever shaft 3 is rotated around the end of the bearing 8 and slid into the groove from the opening of the U-shaped bearing of the opposite bearing 9.
At this time, when the elastically deformable claw is pushed in the c direction and the idle lever shaft 3 moves to the lower part of the U-shaped bearing 4, the claw 6
Is returned by elastic force (in direction b), and idle lever shaft 3
Are held by the bearing 4.

At the time of removal, the idle lever shaft 3 can be moved in the d direction by pushing the claw 6 in the c direction and can be easily removed.

[0016]

As described above, according to the present invention, since the side frame is provided with the integrally formed bearing portion having the claws, the parts of the bearing are not required, and the main body of the sheet feeding device and the idle lever shaft are attached and detached. Can be carried out easily, and has a great effect on cost reduction and improvement of workability.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a bearing mechanism of the present invention.

FIG. 2 is a side sectional view of an essential part showing an embodiment of the bearing mechanism of the present invention.

FIG. 3 is a perspective view of essential parts showing an embodiment of the bearing mechanism of the present invention.

FIG. 4 is a bottom view of a sheet feeding device that requires a bearing according to the related art.

FIG. 5 is a side sectional view of a conventional bearing mechanism.

FIG. 6 is a perspective view of FIG.

FIG. 7 is a vertical sectional view of FIG.

FIG. 8 is an explanatory view of attaching and detaching the bearing.

[Explanation of symbols]

 3 Idle lever shaft 4 Bearing part 5 Side frame 6 Claw 7 Bearing

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Asano 347 Hino, Hino City, Tokyo Orient Time Clock, Hino Plant Co., Ltd.

Claims (1)

[Claims] 1. A side frame facing each other, a cup-shaped bearing integrally formed on the side frame and having one side frame for receiving one end of an idle lever shaft, and the other side frame having an idle lever shaft. The other end of the idle lever shaft has a U-shaped bearing portion at right angles to the idle lever shaft and a claw elastically deformable from the opening of the U-shaped bearing portion toward the groove portion. Bearing mechanism.