JP3352275B2 - Foreign matter intrusion prevention member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for preventing foreign matter from entering a bearing portion of a drive system of a copying machine or the like.

[0002]

2. Description of the Related Art In a bearing portion of a drive system of a conventional copying machine or the like, foreign substances such as toner fall and accumulate on the bearing portion, and enter a sliding portion to increase a load or generate abnormal noise. Problem. Therefore, in order to prevent such a situation from occurring, a foreign matter intrusion prevention member is provided. As the foreign matter intrusion prevention member, a portion above the bearing of the member to which the bearing is attached is bent. In this case, the eaves are formed by attaching a separate member to the eaves. However, in recent years, space saving of machines has progressed, and it has become difficult to provide a space for forming the eaves as described above. In particular, when another member is attached, the eaves are peeled off over time. In addition, since a sufficient space cannot be obtained, the attaching and detaching operation of the drive system may be complicated, and there is a problem that the driving system may be peeled off at that time.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional foreign matter intrusion prevention member and to provide a drive system which is space-saving and has a complicated mechanism. Another object of the present invention is to provide a foreign matter intrusion prevention member which can be easily attached to a copying machine or the like and does not peel off with the passage of time.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a first aspect of the present invention, wherein foreign matter such as toner falls in a bearing portion of a drive system of a copying machine or the like. A horizontal eaves portion for preventing intrusion into the bearing sliding portion, and a vertical mounting portion, the whole being made of a thin member such as Mylar, and a bearing fitting hole provided in the mounting portion. It is characterized by the following. According to a second aspect of the present invention, in the first aspect of the present invention, laterally bent portions are provided on both sides of the bearing fitting hole of the mounting portion.

[0005]

When the present invention as described above is mounted on a bearing of a drive system of a copying machine or the like, it is mounted on a mounting plate of a copying machine or the like provided with a bearing fitting hole having the same shape as the bearing fitting hole. The bearings are attached so that the two bearing insertion holes coincide with each other, a bearing is inserted into the bearing insertion holes, and a shaft of a drive system such as a copying machine is inserted into the bearings.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The first embodiment shown in FIG. 1 has a horizontal eaves portion 1 for preventing foreign substances such as toner from falling and entering a bearing sliding portion, and a vertical mounting portion 2, and the whole is mylar. And the like, and the mounting portion 2 is provided with a bearing fitting hole 3. When such a device is attached to a copying machine or the like, as shown in FIG.
The mounting portion 2 is attached to a mounting plate 5 of a copying machine or the like provided with a bearing so that the two bearing insertion holes 3 and 4 coincide with each other, and the receiving shaft portion 7 of the bearing 6 is inserted into the bearing insertion holes 3 and 4. Then, a shaft 8 of a drive system of a copying machine or the like is fitted into the bearing 6 and locked by a clip ring 9 (FIG. 3). In the second embodiment shown in FIG. 4, sub-eave pieces 10 are vertically provided from three side edges of the eave portion 1 of the first embodiment. In the third embodiment shown in FIGS. 5 and 6, the mounting portion 2 of the first embodiment is provided with bent portions 11 on both sides of the bearing fitting hole 3 in the lateral direction.

In the first embodiment as described above, these components are easily mounted on a drive system having a space-saving and complicated structure, and falling foreign substances are received by the eaves portion 1. Foreign matter, such as toner, does not fall on the bearing of the drive system such as the above and accumulates on the bearing, and does not enter the sliding portion. In the second embodiment, these effects are further increased by the auxiliary eaves pieces 10, and in the third embodiment, the bent portions are further increased.
Due to the elasticity of 11, the play in the thrust direction of the bearing can be suppressed.

[0008]

The present invention is as described above. According to the first aspect of the present invention, in a bearing portion of a drive system of a copying machine or the like, foreign matter such as toner falls and enters a sliding portion of the bearing. It has a horizontal eaves part and a vertical mounting part to prevent
Since the whole is made of a thin member such as Mylar, and a bearing fitting hole is provided in the mounting part, these parts can be easily mounted even if the drive system has a complicated structure by saving space and dropping. Since foreign substances such as toner are caught by the eaves, foreign substances such as toner do not fall into the bearings of the drive system of the copying machine, etc., and do not accumulate on the bearings and enter the sliding parts. By preparing bearing insertion holes of different shapes, it is possible to apply the present invention to copying machines of different models. According to a second aspect of the present invention, in the first aspect of the present invention, both sides of the bearing insertion hole of the mounting portion are bent laterally, and the elasticity of the bent portion causes the bearing to have a play in the thrust direction. Therefore, even if splashes of falling objects accumulate with the passage of time and enter the sliding portion, vibration of the bearing due to the accumulation can be suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of each part before mounting.

FIG. 3 is a front view after the attachment.

FIG. 4 is a perspective view of a second embodiment of the present invention.

FIG. 5 is a perspective view of a third embodiment of the present invention.

FIG. 6 is a front view after mounting the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Eave part 2 Mounting part 3 Bearing insertion hole 4 Bearing insertion hole 5 Mounting plate 6 Bearing 8 Drive shaft 11 Bending part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-264972 (JP, A) JP-A-2-296258 (JP, A) JP-A 62-35365 (JP, U) JP-A 20356 (JP, U) Actually open 3-20355 (JP, U) Actually open 63-54156 (JP, U) Actually open 58-112769 (JP, U) Actually open 61-174337 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) G03G 15/00 550 G03G 15/08 G03G 21/16-21/18 F16C 33/72-33/82 F16J 15/16

Claims (2)

(57) [Claims] 1. A bearing portion of a drive system of a copying machine or the like, having a horizontal eaves portion for preventing foreign substances such as toner from falling and entering a bearing sliding portion, and a vertical mounting portion. A foreign material intrusion prevention member, which is entirely formed of a thin member such as a mylar, and wherein a bearing fitting hole is provided in the mounting portion. 2. The foreign matter intrusion prevention member according to claim 1, wherein laterally bent portions are provided on both sides of the bearing insertion hole of the mounting portion.