JPH03154679A - Apparatus for washing drum - Google Patents

Abstract

PURPOSE:To certainly wash the end surface of a drum and the inner peripheral surface of the end part thereof by emitting a washing solution to the taper surface of a mounting member under high pressure from a shower nozzle and floating the drum mounted on the mounting member. CONSTITUTION:A mounting member 14 is formed into a columnar shape whose axis is vertical and has a taper surface 14a whose upper outer peripheral surface becomes tapered upwardly and a drum 60 to be washed is vertically mounted on the taper surface 14a. A shower nozzle 20 is formed into an annular shape so as to be externally fitted to the mounting member 14 and has an emitting orifice 21 provided to the inner peripheral part thereof and emits a washing solution to the taper surface 14a of the mounting member 14 under predetermined high pressure so as to float the drum mounted on the mounting member 14. As a result, the end surface of the drum and the inner peripheral surface of the end part thereof can be certainly washed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is used for cleaning drums such as aluminum tubes used as photoreceptor drums during the manufacture of photoreceptor drums for image forming apparatuses. The present invention relates to a drum cleaning device.

(Prior Art) Photoreceptor drums used in image forming apparatuses such as electrophotographic copying machines and printers are manufactured by applying a coating liquid containing a photosensitive substance to the outer peripheral surface of an aluminum sheet. In order to apply the coating liquid to a uniform thickness, the aluminum raw tube is cleaned before applying the coating liquid to remove foreign substances such as metal powder and oils and fats adhering to its surface.

An example of a method for cleaning an aluminum tube is a method of cleaning the aluminum tube by ultrasonically vibrating a cleaning liquid in which the aluminum tube is immersed, as disclosed in Japanese Patent Application Laid-Open No. 108568/1983. Are known.

However, with this method, in order to completely remove foreign substances that are firmly attached to the aluminum tube, it is necessary to
This method has the drawback that the aluminum tube must be immersed in the cleaning solution for a long time, reducing work efficiency.

Therefore, the applicant installed a plurality of cleaning brushes having ring-shaped bristles in the cleaning liquid stored in the cleaning tank, and while the cleaning liquid was vibrated by ultrasonic waves, the aluminum tube was rotated. By passing the inside of the brush bristles up and down and bringing the brush bristles into contact with the outer circumferential surface of the aluminum tube, foreign matter attached to the outer circumferential surface of the aluminum tube is efficiently and reliably removed in a short time. (Utility Application No. 63-14311).

(Problems to be Solved by the Invention) With such a drum cleaning device, foreign matter such as metal powder adhering to the outer peripheral surface of an aluminum tube can be effectively removed. However, it is not possible to remove foreign matter such as metal powder adhering to the lower end surface of the aluminum tube or the inner peripheral surface of the lower end.

In the next coating step, the cleaned aluminum tube is immersed in a coating solution containing a photosensitive substance while being held vertically, and the coating solution is applied to its outer peripheral surface. At this time, the coating liquid in which the aluminum tube is immersed is
In order to apply the coating liquid to a uniform thickness on the outer circumferential surface of the aluminum tube, the coating liquid is constantly passed through from below to above so that the surface of the coating solution does not shift when the aluminum tube is immersed. , causing an overflow. Therefore, if metal powder, etc. adheres to the lower end surface of the aluminum tube or the inner peripheral surface of the lower end, the coating liquid flowing from below will move the metal powder, etc. to the outer peripheral surface of the aluminum tube. There is a risk that it may adhere to the outer peripheral surface of the aluminum tube. In this way, if foreign matter such as metal powder adheres to the outer circumferential surface of the aluminum tube, a thin coating liquid will be applied to that area, so it is necessary to apply a photosensitive layer to a uniform thickness on the outer circumferential surface of the aluminum tube. cannot be formed. A photoreceptor drum manufactured in this manner cannot form a desired image.

The present invention solves the above-mentioned conventional problems, and its object is to provide a drum cleaning device that can reliably clean the drum end face and the inner circumferential surface of the drum end.

(Means for Solving the Problems) The drum cleaning device of the present invention has a cylindrical shape with a vertical axis, and has a tapered surface whose upper outer circumferential surface tapers upward. a mounting member, on which the drum to be cleaned is vertically mounted on the tapered surface;
A discharge port is provided on the inner periphery of an annular ring that is fitted onto the outside of the mounting member, and the cleaning liquid is directed toward the tapered surface of the mounting member so that the drum mounted on the mounting member floats. The shower nozzle discharges water at a predetermined high pressure so as to achieve the above object.

(Example) The present invention will be described below with reference to Examples.

The drum cleaning device of the present invention is used to clean the outer peripheral surface of the drum on which the photosensitive layer is formed when manufacturing a photoreceptor drum in which the photosensitive layer is formed on the outer peripheral surface of the drum made of an aluminum tube. . The drum cleaning device is generally used to further clean the cleaned drum after the drum is immersed in a cleaning liquid contained in a cleaning tank.

As shown in FIGS. 1 and 2, the drum cleaning device of the present invention includes a lifting platform IO that is arranged in a cleaning tank and can be raised and lowered, and a shower nozzle 20 that can be fitted onto the lifting platform IO. have.

The elevating table 10 includes a cylindrical support member 12 vertically attached to a flat elevating plate ll that can be raised and lowered, and a cylindrical support member 12 that is rotatably fitted onto the support member 12 via a bearing 13. The drum 5o to be cleaned is placed on the placement member 14.

The upper part of the mounting member 14 extends upward from the upper surface of the support member 12, and the outer circumferential surface of the upper part has a tapered surface 14a tapered at the upper side. The tapered surface 1
4a is inclined at about 15 to 45 degrees with respect to the horizontal plane. The inner diameter of the upper end of the mounting member 14 is slightly larger than the inner diameter of the drum 50 on which it is mounted. For example, four grooves 14b are provided in the upper part of the mounting member 14 at equal intervals in the circumferential direction. Each groove 14b has a flat bottom surface, and each groove 14b has a flat bottom surface.
One side surface extends in the radial direction, while the other side surface has a groove width of 30 to 60 mm in the radial direction so that the groove width becomes narrower toward the inner circumference. degree,
It is in a tilted position.

For example, four guide shafts 5 are vertically provided on the upper surface of the support member 12. The upper end of each guide shaft 15 is tapered toward the upper side, and the guide shaft 15 has an upper end that is tapered toward the upper side so that the drum 50 to be cleaned is securely placed on the mounting member 14. Each fits in and guides the drum SO.

As the lift table 10 rises, it fits into a fixedly provided annular shower nozzle 20. The three-shower nozzle 20 is provided with a cleaning liquid discharge port 21 around the entire inner circumference, and the cleaning liquid is discharged from the discharge port 21 at a high pressure of, for example, 2 to 40 kg/cm<2>. In the shower nozzle 20, when the lifting table 10 reaches a predetermined raised position, the mounting member 14 is fitted concentrically with a predetermined gap, and the discharge port 21 is provided on the upper part of the mounting member 14. The grooves 14b face the bottom surfaces of the grooves 14b. The discharge port 21 of the shower nozzle 20 is reliably opposed to the upper end of the drum 50 placed on the mounting member 14 when the lifting platform 10 is lowered. The operation is as follows. The drum 50, which has been immersed and cleaned in the ultrasonically vibrated cleaning liquid, is held vertically by a predetermined chucking device and is transferred above the mounting member 14 on the lifting platform IO. At this time, the elevator platform 10 has been raised to a predetermined position, and the bottom surface of each groove 14b of the mounting member 14 is facing the discharge port 21 of the shower nozzle 20. Then, the chucking device is sequentially lowered to the lifting platform 10.
The guide shaft 15 is fitted into the lower end of the drum IO to guide the drum 50, and the drum 50 is placed concentrically on the tapered surface 14a of the placement member 14.

In this state, the cleaning liquid is discharged at a predetermined high pressure from the discharge port 21 of the shower nozzle 20, and the elevator platform 1O is lowered, so that the cleaning liquid is discharged from the lower end onto the outer peripheral surface of the drum 50.
The cleaning liquid is sequentially sprayed at high pressure. As a result, foreign matter such as dust adhering to the outer peripheral surface of the drum 50 is removed. In this way, when the lifting table 10 is lowered and the cleaning liquid is sprayed to the upper end of the drum 50 placed on the mounting member 14, the lifting table 10 is raised and the outer circumferential surface of the drum 50 is sprayed again. Cleaning liquid is sprayed all over. Thereby, the outer peripheral surface of the drum 50 is reliably cleaned.

The lifting table 10 continues to rise even after the discharge port 21 of the shower nozzle 20 passes the position facing the lower end of the drum 50, and the bottom surface of each groove 14b of the mounting member 14
It faces the discharge port 21 of the shower nozzle 20.

In this state, the cleaning liquid discharged from the discharge port 21 of the shower nozzle 20 flows into each groove 1 of the mounting member 14.
4b and each tapered surface 14a.
Flows upward along the . Each groove 14b has one side surface inclined at a predetermined angle with respect to the radial direction of the mounting member 14, so that the discharge port 21 of the shower nozzle 20
The cleaning liquid discharged from the grooves 14b and flowing into each groove 14b collides with each other, and the mounting member 14, which is rotatably supported by the bearing 13 with respect to the support member 12, is rotated toward the side surface. On the other hand, the cleaning liquid flowing along each tapered surface 14a collides with the lower end surface of the drum 20 placed on the rotating mounting member 14, and slightly pushes the drum 50 onto the mounting member 14. bring it to the surface. As a result, the cleaning liquid cleans the lower end surface of the drum 50 and the inner peripheral surface of the lower end portion of the drum 50 while rotating. The lower end surface of the drum 50 is connected to the mounting member 14
Since the drum 50 is in a floating state, the cleaning liquid contaminated by cleaning the outer circumferential surface, lower end surface, and inner circumferential surface of the drum 50 remains between the lower end surface of the drum 50 and the mounting member 14. There is no risk of staining the lower end surface of the drum 50.

In this way, when the lower end surface and the inner circumferential surface of the lower end portion of the drum 50 are cleaned for a predetermined period of time, the drum 50
For example, it is transported to a degreasing and cleaning process by a predetermined chucking device, and is degreased and cleaned.

After that, the drum 50 is immersed in a coating liquid containing a photosensitive substance, and the coating liquid is applied to the outer peripheral surface.
By drying the coating liquid, a photosensitive drum having a photosensitive layer formed on its outer peripheral surface is manufactured.

(Effects of the Invention) As described above, the drum cleaning device of the present invention sprays the high-pressure cleaning liquid onto the drum placed on the placement member, thereby keeping the drum floating above the placement member. Since the lower end surface of the drum is cleaned, there is no risk of dirty cleaning liquid adhering to the lower end surface of the drum, and the cleaning effect of the lower end surface of the drum is significantly improved. Therefore, if the aluminum tube used for the photoreceptor drum is cleaned by the drum cleaning device of the present invention, a uniform photosensitive layer can be formed by immersing the aluminum tube in a coating liquid containing a photosensitive substance. can be formed.

4. Figure 1 is a cross-sectional view of the main parts of an example of the drum cleaning device of the present invention, and Figure 2 is a perspective view of the elevator platform thereof.

DESCRIPTION OF SYMBOLS 10... Elevating table, 12... Support member, 13... Bearing, 14... Mounting member, 14a... Tapered surface, 14b... Concave groove, zO... Shower nozzle, 2
1...Discharge port.

that's all

Claims (1)

[Claims] 1. A drum to be cleaned which has a cylindrical shape with a vertical axis, and whose upper outer peripheral surface has a tapered surface that tapers upward. A mounting member is placed vertically on the tapered surface, and an annular discharge port is provided on the inner circumference of the mounting member and is fitted onto the outside of the mounting member. a shower nozzle that discharges cleaning liquid at a predetermined high pressure so that the drum placed on the placement member floats;