JPH041561Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application The invention is mainly used to support the rotating shaft of a developer (toner) stirring roller or sleeve roller disposed in the developing device of a copying machine. The present invention relates to a bearing device for a rotating shaft of a developing device.

BACKGROUND ART As shown in FIG. 6, this main bearing device has a bearing 3 fitted and fixed from the outside into a mounting hole 2 of a side plate 1 of a developing device, and a rotating shaft 4 inserted through the bearing 3 is fitted with an E-type stopper. A ring 5 is engaged, and the E-shaped retaining ring 5 prevents the bearing 3 from coming off in the thrust direction.

Problems to be Solved by the Invention Incidentally, in the bearing device described above, in order to prevent the rotating shaft 4 from becoming locked due to expansion of the side plate due to temperature rise, a It is necessary to provide a gap. However, this gap deteriorates the adhesion between the side plate 1 and the bearing 3, as shown by the dashed-dotted arrow in the figure.
This causes an inconvenience in that the developer leaks to the outside from the developing device.

The present invention was devised in view of these conventional problems and to solve them.The present invention is a developing device that can support the rotating shaft to prevent developer leakage and that can be easily fixed to the side plate. The purpose is to provide a bearing device for a rotating shaft of a device.

Means for Solving the Problems In order to achieve the above object, the bearing device for the rotating shaft of the developing device of the present invention includes a bearing with a seal that inserts and holds the rotating shaft disposed in the developing device, and a bearing with a seal. a cylindrical strip in which a fitting hole and an insertion hole for the rotating shaft are continuously bored in the center thereof, each having a flange on one side and a claw portion protruding inward on the other side; The plate includes a ring-shaped plate having an insertion hole on the other side of the member and has an engagement recess formed on one side with which the claw engages, and the other side of the bearing member is inserted from the outside into the mounting hole of the side plate of the developing device. The claw portion is inserted into the insertion hole of the plate, and the bearing member is rotated to engage and fix the claw portion in the engagement recess.

Function A bearing with a sealing member is fitted and fixed in the fitting hole of the bearing member in advance, and the other side of the bearing member is inserted from the outside of the mounting hole of the side plate of the developing device, and the plate located inside the side plate is inserted. After the bearing member is inserted into the hole, the bearing member is rotated and the claw portion is engaged with the engagement recess of the plate, whereby the bearing member is prevented from coming off by the plate and fixed to the side plate. In this state, leakage of developer is prevented by the flange of the bearing member located outside the side plate, and leakage of developer along the circumferential surface of the rotating shaft is reliably prevented by the seal of the sealing bearing.

Embodiment FIGS. 1 to 5 show an exploded perspective view, a front view, a sectional view taken along the line A-A, a front view of a plate, and a sectional view taken along the line B-B, respectively, of an embodiment of the present invention. In these figures, reference numeral 6 denotes a bearing member, which has a cylindrical shape with a fitting hole 6a into which a bearing with a seal, which will be described later, is fitted, and an insertion hole 6b into which a rotating shaft is inserted. A flange 6c is integrally formed at the other end, and a pair of elastic pieces 6d extending in the orthogonal direction and a claw 6e extending inward from the tip of the elastic pieces 6d are provided. ing.

Reference numeral 7 indicates a known sealing bearing equipped with a rubber seal 7a, which is fitted and fixed into a fitting hole 6a of the bearing member 6. Reference numeral 8 denotes a plate for fixing the bearing member 6 to prevent it from coming off, and as shown in FIGS. 4 and 5, the bearing member 6 having an elastic piece 6d and a claw portion 6e is inserted into the center of the flat disc. A keyhole-shaped insertion hole 8e is provided, and the entire bearing member has a ring shape, and a pair of engagement recesses 8b into which the claw portions 6e of the bearing member 6 engage are formed on one surface.

Reference numeral 9 denotes a side plate of a housing of a developing device in a copying machine, and a mounting hole 9a having substantially the same shape as the insertion hole 8a of the plate 8 is provided. Reference numeral 10 denotes a rotation shaft, which is a rotation support shaft of a stirring roller or sleeve roller disposed within the developing device to stir or transport the developer.

Next, the assembly procedure of the above embodiment will be explained. After the bearing 7 with a seal is fitted into the fitting hole 6a of the bearing member 6 in advance, this bearing member 6 is inserted into the claw part 6.
The other side where e is provided is external to the mounting hole 9a of the side plate 9 (the right side in FIGS. 1 and 3).
It is inserted into the insertion hole 8a of the plate 8 located inside the side plate 9 (on the left side in FIGS. 1 and 3). When the bearing member 6 is rotated in either the left or right direction in this state, the claw portion 6e is moved into the insertion hole 8a due to elastic deformation of the elastic piece 6d.
From there, it rides on one side of the plate 8 and slides.
Then, by further rotating the bearing member 6, when the claw portion 6e is positioned above the engagement recess 8b, the restoring force of the elastic piece 6d causes the claw portion 6e to move into the recess 8b.
b, and the side plate 9 is sandwiched between the bearing member 6 and the plate 8, and the bearing member 6 is prevented from coming off by the plate 8 and fixed to the side plate 9.

With such a configuration, since the rotating shaft 10 is pivotally supported, the developer inside the side plate 9 is transferred to the plate 8 which is joined to both the inner and outer edge surfaces of the mounting hole 9a of the side plate 9.
Also, it is prevented from leaking to the outside by being blocked by the flange 6c. . Furthermore, the developer that is about to leak to the outside through the circumferential surface of the rotating shaft 10 is blocked by the rubber seal 7a of the sealing bearing 7. Therefore, leakage of developer can be reliably prevented. Furthermore, since the rotating shaft 10 is supported by being inserted into the bearing 7 with a seal, it does not become locked even when the side plate 9 expands due to a rise in temperature, and the bearing of the bearing 7 with a seal always ensures smooth rotation. Rotate to.

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, the bearing member is provided with a pair of pawls, but three pawls may be provided. However, the shapes of the plate insertion holes and the side plate mounting holes were changed accordingly, and the number of recesses in the plate was changed to 3.
Of course, it is necessary to make them individual.

Effects of the Invention As detailed above, according to the bearing device for the rotating shaft of the developing device of the present invention, the sealing bearing is fitted, and the claw portion facing inward on one side and the flange portion on the other side are provided. After inserting the bearing member into the ring-shaped plate, the claw part is engaged and fixed by rotating, and the plate and flange part are connected to the inner and outer surfaces of the side plate, respectively. Leakage of developer can be reliably prevented.

Further, the developer that tends to leak to the outside through the circumferential surface of the rotating shaft can be prevented by the seal of the sealing bearing. Furthermore, after inserting the bearing member, it can be fixed by an extremely simple operation of just rotating it, and there is an advantage that no other fixing member such as adhesive is required.

[Brief explanation of drawings]

1 to 5 show an embodiment of the present invention,
Figure 1 is an exploded perspective view, Figure 2 is a front view, Figure 3 is a sectional view taken along line A-A in Figure 2, Figure 4 is a front view of the plate, and Figure 5 is B-B in Figure 4. The line sectional view and FIG. 6 are longitudinal sectional views of a conventional bearing device. 6...bearing member, 6a...fitting hole, 6b...insertion hole, 6c...flange, 7...bearing with sealing,
8...Plate, 8a...Through hole, 8b...Engaging recess, 9...Side plate, 9a...Mounting hole, 10...Rotating shaft.

Claims (1)

[Scope of utility model registration request] A bearing with a seal that inserts and holds a rotating shaft disposed in the developing device, a fitting hole of the bearing with the seal, an insertion hole of the rotating shaft, and a flange on one side with a cylindrical strip connected to the center. and a bearing member each having a claw portion protruding inwardly on the other side, and a ring-shaped engagement recessed portion having an insertion hole on the other side of the bearing member and having one surface formed with an engagement recess into which the claw portion engages. The other side of the bearing member is inserted from the outside into the mounting hole of the side plate of the developing device and inserted into the insertion hole of the plate, and the claw portion is moved into the engagement position by rotating the bearing member. 1. A bearing device for a rotating shaft of a developing device, characterized in that the bearing device is configured to be fixed by engaging in a mating recess.