JP2529709Y2 - Bearing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing device used for a printer, for example, for holding a rotating shaft to which a rotating component such as a rubber roller is attached.

[0002]

2. Description of the Related Art FIG.
FIG. 2 is a cross-sectional view showing a conventional bearing device for a printer similar to that shown in Japanese Patent Application Publication No. 0-No. In the figure, 1 is a frame provided with a hole 1a, 2 is a rotating shaft whose end portion is rotatably supported by the frame 1 through the hole 1a, and 3 is attached to the rotating shaft 2 of the rotating shaft 2. This is an E-ring for retaining in the axial direction, and is provided on each side of the hole 1a. Reference numeral 4 denotes a rubber roller attached to an intermediate portion of the rotating shaft 2.

In the conventional bearing device as described above, after the rubber roller 4 is attached to the rotating shaft 2, the end of the rotating shaft 2 is passed through the hole 1a, and the E-ring 3 is attached to the rotating shaft 2 in the radial direction. Thereby, the rubber roller 4 is rotatably attached to the frame 1 together with the rotating shaft 2.

FIG. 12 is a cross-sectional view showing another example of the conventional bearing device, and FIG. 13 is a side view showing the bearing mounting portion of FIG. In the figure, reference numeral 5 denotes a gear press-fitted into the end of the rotary shaft 2 penetrating the frame 1, and reference numeral 6 denotes a bearing which is attached to the hole 1b and rotatably holds the rotary shaft 2.

As described above, in the case where the rubber roller 4 and the gear 5 are mounted on one rotary shaft 2 and the mounting position of the gear 5 is limited to the end of the rotary shaft 2, in the conventional bearing device, After attaching the rubber roller 4 and the gear 5 to the rotating shaft 2, the rotating shaft 2 is inserted into the hole 1a as shown by the arrow in FIG. 13, and then the bearing 6 is pressed into the hole 1b. Thereby, the rubber roller 4 and the gear 5 are rotatably attached to the frame 1 together with the rotating shaft 2.

[0006]

In the conventional bearing device constructed as described above, a ring member such as an E-ring 3 is attached to the rotating shaft 2 to position the rotating shaft 2 in the axial direction (thrust direction). Since the displacement was regulated, FIG.
When the rotary shaft 2 is supported at the center as in the above, the bearing 6 needs to be moved from the end of the rotary shaft 2 to a predetermined position, so that the number of parts increases and the mounting to the rotary shaft is performed. There was a problem that it took time and effort. In addition, the bearing 6 needs to be attached to the rotating shaft 2 before attaching the gear 5 or the rubber roller 4, and there is a problem that there is a limitation in an assembling procedure of the rotating shaft device (assembly).

[0007] The present invention has been made to solve the above-described problems, and can reduce the number of parts and simplify the mounting on a rotating shaft. It is an object of the present invention to provide a bearing device that can reduce the overall cost and eliminate restrictions on the assembly procedure of the rotary shaft device.

[0008]

In the bearing device according to the present invention, U-shaped first and second engagement portions whose opposite sides are open are formed at a distance from each other in the axial direction. A bearing is provided by engaging the first and second engaging portions with the small diameter portion of the shaft and fixed to the support portion.

[0009]

In the present invention, the bearing body is rotated around the portion between the first and second engagement portions with respect to the small diameter portion,
The first and second engaging portions are engaged with the small-diameter portion, and the bearing body is attached to the rotating shaft, whereby the rotating shaft is rotatably held and fixed in the axial direction.

[0010]

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 perspective view showing a bearing device for a printer according to an embodiment of the present invention, and FIG. 2 is a side view of FIG. In the figure, reference numeral 11 denotes a frame as a support portion, 12 denotes a bearing fixed to the frame 11, 13 denotes a bearing bush fixed to the frame 11, and 14 denotes a rotation on the frame 11 by the bearing 12 and the bearing bush 13. The rotating shaft 14 has a small-diameter portion at the mounting portion of the bearing body 12 at the intermediate portion, that is, a first small-diameter portion 14a has a second small-diameter portion at the insertion end of the bearing bush 13. Is formed. 15a and 15
b is a first shaft mounted on the rotating shaft 14 at a distance from each other.
And a second adhesive rubber roller 16 is a press-fit gear attached to the other end of the rotating shaft 14.

FIG. 3 is a plan view showing the bearing body 12 of FIG.
3 is a side view of FIG. 3, and FIG. 5 is a front view of FIG. In the figure, reference numeral 12a is formed at one end of the bearing body 12 in the axial direction.
The first engaging portion 12b engaging with the small-diameter portion 14a of the
And a second engaging portion which is formed at the other end in the axial direction and engages with the first small diameter portion 14a. These first and second engagement portions
Each of 12a and 12b has a substantially U-shape (or a C-shape) in which the opposite sides are open. Reference numeral 12c is a fixing portion formed at the bottom of the bearing body 12 for fixing the bearing body 12 to the frame 11.

Next, an assembling method will be described. First,
First and second adhesive rubber rollers 15a and 15b and a press-fit gear 16 are attached to the rotating shaft 14. Next, as shown in FIG. 6, a portion between the first and second engagement portions 12a and 12b of the bearing body 12 intersects the first small diameter portion 14a. And FIG.
As shown in the figure, the bearing body 12 is rotated in the counterclockwise direction in the drawing (the direction of the arrow in the drawing) about the portion between the first and second engaging portions 12a and 12b. By rotating the bearing body 12 by 90 °, as shown in FIG.
a and 12b engage with the first small diameter portion 14a.

Further, the second small diameter portion 14b is connected to the bearing bush 13
And the bearing bush 13 is fixed to the frame 11. At the same time, the bearing body attached to the first small diameter portion 14a
12 is fixed to the frame 11. 9 and FIG.
0, a bearing body fixing hole provided in the frame 11
By inserting the fixed part 12c into the frame 11a,
Fixed to The fixing part 12c is inserted into the bearing body fixing hole 11a.
When it is inserted, it is elastically deformed and the wall surface of the bearing
A spring portion 12d for pressing is integrally formed as a retaining member, and the spring force firmly fixes the bearing body 12 to the frame 11.

In such a bearing device, since the rotating shaft 14 is fixed in the axial direction only by the bearing body 12 without using an E-ring or the like, the bearing at the other end of the rotating shaft 14 is also used. A simple method of inserting it into the bearing bush 13 is sufficient,
The number of parts is greatly reduced as compared with the conventional one. Also,
Since the bearing body 12 is easily attached by the snap action, the attachment to the rotary shaft 14 is easy, and the assembly procedure of the rotary shaft device is not restricted. That is, a highly reliable bearing with one component can be realized at low cost.

In the above embodiment, the fixed part 12 is
Although c is provided and fixed to the frame 11, the method of fixing the bearing body 12 to the frame 11 is not limited to this. For example, a holding portion for the bearing body 12 may be provided on the frame 11 side.
In the above embodiment, the rotary shaft 14 to which the first and second adhesive rubber rollers 15a and 15b and the press-fit gear 16 of the printer are attached is shown. It may be. The rotation shaft 14 is 360
It may be one that rotates within °. Further, in the above embodiment, the other end of the rotating shaft 14 is held by the bearing bush 13, but may be held by another bearing.

[0016]

As described above, in the bearing device of the present invention, the U-shaped first and second engagement portions, whose opposite sides are open, are formed at intervals in the axial direction. The rotating shaft is rotatably held by the body and is fixed in the axial direction, so that the number of parts can be reduced, and the mounting on the rotating shaft can be simplified. Can be reduced in cost, and the effects of eliminating restrictions on the assembly procedure of the rotary shaft device can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a bearing device according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing the bearing body of FIG. 1;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a front view of FIG. 3;

FIG. 6 is a plan view showing a state before the bearing of FIG. 1 is attached to a rotating shaft.

FIG. 7 is a plan view showing a state in which the bearing of FIG. 1 is being mounted on a rotating shaft.

FIG. 8 is a plan view showing a state after mounting the bearing body of FIG. 1 on a rotating shaft.

FIG. 9 is a front view showing a state in which the bearing body of FIG. 1 is attached to a frame.

FIG. 10 is a bottom view of FIG. 9;

FIG. 11 is a sectional view of a main part of an example of a conventional bearing device.

FIG. 12 is a sectional view of a main part of another example of a conventional bearing device.

FIG. 13 is a side view showing the bearing mounting portion of FIG.

[Explanation of symbols]

 11 Frame (supporting part) 12 Bearing body 12a First engaging part 12b Second engaging part 14 Rotary shaft 14a First small diameter part (small diameter part)

Claims (1)

(57) [Scope of request for utility model registration] 1. A small diameter portion provided on a rotating shaft can be inserted.
First and second engaging portions opposite the U-shaped open each other are formed spaced apart from each other in the axial direction so as, with a bearing body fixed to the supporting lifting portion, said first and second 2 of the engaging part
Temporarily place the small-diameter part in between, and center the bearing body around this part.
By rotating in the direction perpendicular to the direction, the first
And a second engaging portion that engages with the small diameter portion.