JPH0484182A - Flange - Google Patents

Abstract

PURPOSE:To dam up the adhesive applied on an adhesive part with adjacent grooves and to prevent the outflow of the adhesive to the outside by boring adjacent grooves on both sides of the adhesive part of a fitting surface. CONSTITUTION:The grooves 3b3 for pooling the adhesive are adjacently bored on both sides of the adhesive part 3b2 of the fitting surface 3b1 so as to prevent the outflow of the adhesive to the outside. The front side of the fitting part 3b1 is provided with a tapered part 3b4 to allow the easy insertion of a drum flange 3b to a photosensitive drum 3a. Then, the excess adhesive applied on the adhesive 3b2 is dammed up by the grooves 3b3 bored on both sides of the adhesive part at the time of fitting the drum flange 3b to the photosensitive drum 3a. The outflow of the adhesive from the adhesive part to the circumference is prevented in this way.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention is an image forming apparatus such as a copying machine, a printer, a laser beam printer, a facsimile, etc., which is fitted into an opening of a cylindrical member such as a photosensitive drum or a conveyance roller. This relates to the flange that is used.

<Prior Art> Conventionally, various mechanical parts have been used in image forming apparatuses such as copying machines and printers, but among them, a flange fitted into an opening of a cylindrical member has been used. There are many.

For example, a process cartridge 50 constituting an image forming means of a laser beam printer shown in FIG. 5 will be described.

The process cartridge 50 has a photoreceptor 51 which is an image carrier inside. A primary charger 52 for charging the photoreceptor 51. A developing device 53 that attaches toner to the electrostatic latent image and converts it into a visible image. It has a built-in cleaner 54, etc.

Among these, the photoreceptor 51 will be explained with reference to FIG.

The photoreceptor 51 includes a cylindrical photoreceptor drum 51a and a tram flange 5 fitted onto the inner peripheral surface of its opening with an adhesive.
1b, and a ground plate 51c housed inside the photosensitive drum 51a, and is configured to be rotatable about a drum shaft 51d.

The ground plate 51c is in contact with the inner peripheral surface of the photosensitive 1' ram 51a and the drum shaft 51d, and is grounded from the drum shaft 51d.

Further, the drum flange 51b is connected to the ground plate 51c.
is assembled into the photosensitive drum 51a, the fitting surface 51
Apply b+c adhesive and fit into the opening of the photosensitive drum 51a.

A groove 51b2 for an adhesive reservoir is formed on the flange side (left side in the drawing) of the fitting surface 51b to prevent the adhesive from flowing out. Further, a tapered portion 51b is provided on the tip end side (right side in the drawing) of the fitting surface 51b+ so that the drum flange 51b can be easily inserted into the photosensitive drum 51a.
1 is provided.

<Problem to be solved by the invention> However, in the above configuration, the drum flange 5
1b onto the photosensitive drum 51a, the fitting surface 51b
The adhesive applied to the tapered portion 51b flows out,
There is a risk that the particles may adhere between the ground plate 51c and the photosensitive drum 51a, preventing electrical continuity, or may adhere between the drum flange 51b and the tram shaft 51d, reducing the rotational performance of the photosensitive drum 51a. Ta.

An object of the present invention is to solve the above-mentioned problems of the prior art and provide a flange in which grooves adjacent to both sides of the bonded part are bored in the fitting surface to be fitted into the opening of the cylindrical member.

Means for Solving the Problems> A typical means that solves the problems of the prior art described above and is applied to the embodiments described below is to provide a flange that is fitted into an opening of a cylindrical member on a fitting surface. It is characterized by having grooves adjacent to both sides of the adhesive part.

<Operation> According to the above means, grooves adjacent to both sides of the adhesive part are formed in the fitting surface of the flange to be fitted to the cylindrical member, so that when fitting the flange to the cylindrical member, the adhesive Adhesive applied to the area can be dammed up by the adjacent groove.

<Example> Hereinafter, an example of a flange to which the present invention is applied will be described with reference to the drawings. In this embodiment, a laser beam printer is used as an image forming apparatus, and a flange that constitutes a photoreceptor will be described.

FIG. 1 is a partially cross-sectional explanatory diagram of a photoreceptor, and FIG. 2 is a cross-sectional explanatory diagram showing a schematic configuration of a laser beam printer equipped with the photoreceptor.

First, the schematic structure of the laser beam printer will be explained with reference to FIG.

Reference numeral 1 is a scanner unit that irradiates and scans a laser beam according to recorded information, 2 is a process cartridge, and 3 is a photoreceptor that is an image carrier. 4. Primary charger which is a corona discharger. Developing device containing toner5. It has built-in recording means such as cleaner 6.

Further, the laser beam emitted from the scanner unit 1 is irradiated onto the photoreceptor 3 in the process cartridge 2 via the folding mirror 7. The photoreceptor 3 is charged with a primary band of 4J in advance by a device 4, and is irradiated with laser light to form an electrostatic latent image.
A toner image is formed and visualized.

On the other hand, the sheet material 1o fed by the feed roller 9 with the paper feed force cent 8 is separated one by one by a separation pad 11 provided opposite to the feed roller 9. The separated sheet material 1 (l) is guided by guide plates 12a and 12b provided above and below, and is conveyed between the pair of registration rollers 13a and 13b, which are temporarily stopped, to correct the skew. Ru.

Next, the sheet material 1o is provided with a registration roller pair 13a.

13b, the toner image is intermittently conveyed to the transfer section in synchronization with the leading edge of the toner image formed on the photoreceptor 3.

Reference numeral 14 denotes a transfer charger for transferring the toner image formed on the photoreceptor 3 onto the sheet material 10. The transfer charger 14 charges the back side of the sheet material 1o with a polarity opposite to that of the toner, and the toner image is sequentially transferred from the photoreceptor 3 onto the notebook material 10. The above transfer charger 1
The sheet material 10 having the image transferred thereto is separated from the photoreceptor 3 and conveyed to the downstream side. The toner remaining on the photoreceptor 3 is removed by a cleaner 6 in preparation for the next recording.

Further, the unfixed transferred image on the separated and conveyed sheet material 10 is permanently fixed in a fixing device 15, and then is discharged onto a discharge tray 17 outside the apparatus by a pair of discharge rollers 16a and 16b.

Next, the flange applied to the photoreceptor 3 will be explained with reference to FIG.

First, in FIG. 1, the photoreceptor 3 includes a cylindrical photoreceptor drum 3a, a drum flange 3b fitted to the inner circumferential surface of its opening with adhesive, and a ground plate 30 housed inside the photoreceptor tram 3a. etc., and is configured to be rotatable around a drum shaft 3d.

The ground plate 3C is in contact with the inner circumferential surface of the photosensitive drum 3a and the drum shaft 3d, and is grounded from the drum shaft 3d.
grounding) is taken.

The photoreceptor 3 is assembled by incorporating the ground plate 3c into the photoreceptor drum 3a, applying adhesive to the fitting surface 3b+ of the drum flange 3b, and fitting the drum flange 3b into the opening of the photoreceptor drum 3a. .

On both sides of the adhesive part 3bz of the fitting surface 3b, there are grooves 3b3 for adhesive storage so that the adhesive does not flow out to the outside.
are drilled adjacent to each other. Further, a tapered portion 3ba is provided on the distal end side (right side in the drawing) of the fitting portion 3b so that the drum flange 3b can be easily inserted into the photosensitive drum 3a.

According to the above configuration, the drum flange 3b is connected to the photosensitive drum 3.
When the adhesive part 3bz is fitted into the adhesive part 3bz, the excess adhesive can be dammed up by the grooves 3b3 bored on both sides of the adhesive part 3bz. Therefore, the adhesive may be applied between the photosensitive drum 3a and the ground plate 3c, or between the drum flange 3b and the drum shaft 3.
It is possible to prevent leakage between d and d, thereby maintaining electrical contact, rotational performance, etc.

Although this embodiment has been described with reference to the case where it is applied to a laser beam printer as an image forming apparatus, the present invention is not limited to this and may be applied to other apparatuses such as copying machines and facsimile machines.

<Other Examples> Next, Figs. 3 and 4 show other examples of the above flange.
This will be explained with reference to the figures.

In FIG. 3, in this embodiment, a plurality of adhesive portions 3bz are provided in the longitudinal direction of the fitting surface 3b+ of the drum flange 3b, and grooves 3b adjacent to both sides thereof are bored.

According to the above configuration, since a large number of adhesive parts 3b2 are provided on the fitting surface 3b, the amount of adhesive applied to the adhesive parts 3b2 is small, and the grooves 3b3 are bored adjacent to each other. Therefore, it is possible to prevent the adhesive from flowing into the tapered portion 3b.

Next, FIG. 4 shows that the flange is not connected to the photoreceptor 3, but to a developing sleeve 18 that conveys the developer and is provided inside the developing device 5.
The case where it is applied is shown.

In this embodiment, a groove 19az is formed in the fitting surface 19a of the sleeve flange 19, which is fitted into the opening of the cylindrical developing sleeve 18, adjacent to the adhesive part 19a, as described above. .

Note that the flanges are not limited to the parts shown in the above embodiments, and can be applied to various parts that have a cylinder shape, such as rotary drums of printing equipment, conveyance rollers, etc. can also be applied.

<Effects of the Invention> As described above, in the present invention, grooves adjacent to both sides of the adhesive part are formed in the fitting surface of the flange to be fitted to the cylindrical member, so that when fitting the flange to the cylindrical member, In addition, since the adhesive remaining after being applied to the adhesive portion is dammed up by the adjacent groove, it is possible to prevent the adhesive from flowing out from the adhesive portion to the surroundings.

Therefore, the electrical contact, rotational performance, etc. of the cylindrical member can be maintained.

[Brief explanation of drawings]

FIG. 1 is a partially cross-sectional explanatory diagram of a photosensitive drum, FIG. 2 is a cross-sectional explanatory diagram showing a schematic configuration of a laser beam printer equipped with the photosensitive drum, FIGS. 3 and 4 are illustrations of the other side, and FIG. 5 and 6 are explanatory diagrams of conventional examples. 1 is the scanner unit, 2 is the process cartridge, 3
3a is a photosensitive drum, 3b is a drum flange,
3b+ is the fitting surface, 3bz is the adhesive part, 3b is the groove, 3b4
is a taper part, 3c is a ground plate, 3d is a drum shaft, 4 is a primary charger, 5 is a developer, 6 is a cleaner, 7 is a folding mirror, 8 is a paper feed cassette, 9 is a feed roller, 10
1 is a sheet material, 11 is a separation pad, 12a and 12b are guide plates, 13a and 13b are a pair of registration rollers, 14 is a transfer charger, 15 is a fixing device, 16a and 16b are a pair of discharge rollers, 17 is a discharge tray, and 18 is a The developing sleeve 19 is a sleeve flange.

Claims (5)

[Claims] (1) A flange fitted into an opening of a cylindrical member, characterized in that grooves are formed adjacent to both sides of the bonded portion of the fitting surface. (2) The flange according to claim (1), wherein a plurality of adhesive portions and grooves adjacent to both sides thereof are provided in the longitudinal direction of the fitting surface. (3) The flange according to claim 1, wherein the cylindrical member is a photoreceptor serving as an image carrier. (4) The flange according to claim 1, wherein the cylindrical member is a conveyance roller that conveys the sheet material. (5) The flange according to claim 1, wherein the cylindrical member is a developing sleeve that conveys developer.