JPH041672B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for separating a drum, and more particularly, to a method for easily separating a drum coated with a quick-drying coating liquid from a mounting member after drying.

(Prior art) As shown in FIG. 2, a cylindrical drum 101
Apparatus 100 for applying coating liquid 105 to
A pair of spacers 102 and 103 having the same outer diameter as the drum 101 are coaxially connected to both open ends of the drum 101, and the drum 101 is moved to a coating liquid storage container 104 provided in contact with the outer peripheral surface of the drum. By doing so, the coating liquid 105 is applied to the outer peripheral surface of the drum. However, in this apparatus 100, when a quick-drying coating liquid 105 is used, the drum 1
Coating liquid 10 that has entered the minute gap 106 between the connection between 01 and spacers 102 and 103
The drum 101 and the spacers 102 and 103 may be bonded to each other as the drum 101 dries quickly and acts as an adhesive. The drum 101 and the spacers 102 and 103 may adhere to each other due to the surface tension of the coating liquid 105 that has entered the minute gap 106. As a result, when separating the spacer 102 from the drum 101, the lightweight drum 10
1 is lifted up together with the spacer 102. Since such drum coating work is automated by robot operation, continuous drum coating cannot be performed smoothly in the apparatus 100 described above.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems of the prior art, and its purpose is to eliminate the bond between the drum and the spacer by removing the adhesive at the connection between the drum and the spacer. The objective is to provide a method that facilitates the separation of Another object of the present invention is to provide a drum separation method that is simple in process and easy to operate. Yet another object of the present invention is to provide a method for continuously and smoothly separating drums.

(Means for Solving the Problems) The present invention is capable of continuously and smoothly separating the drum and spacer by actively removing the adhesive formed at the connection between the drum and spacer during the coating process. There are characteristics. The drum separation method of the present invention includes: a cylindrical drum whose outer peripheral surface is to be coated with a coating liquid; a pair of cylindrical spacers having the same outer diameter as the cylindrical drum and coaxially connected to both open ends of the cylindrical drum; A drum coating device having a coating liquid storage container disposed in contact with the outer peripheral surface of the cylindrical drum applies the coating liquid to the outer peripheral surface of the cylindrical drum while moving the cylindrical drum in the axial direction, and after drying, coats at least one of the cylinders. A method of separating a spacer from the cylindrical drum by a spacer detaching means, the method comprises: maintaining the interior of a connected body consisting of the cylindrical drum and a pair of cylindrical spacers in an air-liquid tight state; The above object is achieved by filling the interior with compressed air.

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

As shown in FIG. 1a, the apparatus 1 for coating a drum includes a drum 11 and a pair of spacers 12 and 13 having the same outer diameter as the drum 11 and coaxially connected to both open ends of the drum 11. , drum 11
It has a coating liquid storage container 14 disposed in contact with the outer circumferential surface of. Coating liquid storage container 1
4 accommodates a quick-drying coating liquid 141 and an application member 142 such as a blade.

The drum 11 may have a cylindrical shape, and its length
There are no particular restrictions on the diameter, thickness, material, etc.
For example, drums used in electrophotographic photoreceptors are made of aluminum. Each of the spacers 12 and 13 has a cylindrical shape and has at least one end connected to the opening 11 of the drum 11.
1, a connecting portion 121 and an end surface 12.
It has 2. The spacer 13 located below the drum 11 is sealed with the mounting table 15 via a sealing material 151 such as rubber packing.
As the coating liquid 141 contained in the coating liquid storage container 14, for example, a photosensitive liquid for an electrophotographic photoreceptor is used. This photosensitive liquid is composed of a photoconductive pigment, a resin, an organic solvent, etc., and has quick drying properties. As the application member 142,
A blade made of synthetic resin or rubber that is not melted by the coating liquid 141 and has elasticity is appropriately used.

The coating device 1 further includes a spacer 12.
A spacer removing means 2 is provided for separating the spacer from the drum 11. Spacer removal means 2
As shown in FIG. 1b, the compressed air supply port 21
It is composed of a spacer closing plate 22 and a chuck 23. The compressed air supply port 21 is connected to, for example, a compressor (not shown) via, for example, a compressed air supply pipe. Compressed air 3 supplied from the compressor passes through this supply port 21 to the drum 11 and a pair of spacers 12 and 1.
3 and into the interior 16 of the connector. The spacer closing plate 22 itself or at least its contact portion with the end surface of the connecting portion 121 is made of a sealing material such as elastic rubber, for example.
The interior 16 of the connecting body is sealed. Therefore, the compressed air 3 injected into the interior 16 of the connector through the supply port 21 fills the interior 16 of the connector, and the adhesion between the drum 11 and the spacers 12 and 13 caused by drying of the coating liquid 141 occurs. part is removed by the pressure. As a result, drum 11 and spacers 12 and 13 can be easily separated from each other after the coating operation is completed. The chuck 23 is, for example, an automatically controlled robot hand. The spacer 12 from which the adhesive part of the connection part has been removed is separated from the drum 11 by opening the hand part and pulling it upward while making contact with the inner wall surface of the spacer 12.

The above coating device 1 and spacer removal means 2
works like this: First, the spacer 13 is placed on the mounting table 15, which is driven in the vertical direction by a drive source such as a motor, via the sealing material 151, using, for example, a robot hand. The drum 11 to which the coating liquid 141 is to be applied is also connected to the upper end of the spacer 13 using a robot hand. On the other hand, above the mounting table 15,
The coating liquid storage container 14 is on standby while holding the spacer 12. This coating liquid storage container 14 is supported and fixed to a fixed part such as a frame of the apparatus 1. Next, the mounting table 15 on which the drum 11 is mounted is raised via the spacer 13, and connected to the spacer 12 while waiting upward. Then, the mounting table 1 is moved so that the spacer 13 is raised to the position where the spacer 12 was waiting.
Raise 5. During this time, the outer peripheral surface of the drum 11 is coated with the coating liquid container 14. Since the coating liquid 141 has quick-drying properties, the coating liquid 141 applied to the outer peripheral surface of the drum
41 dries immediately. The coating liquid 141 also dries at the joints between the drum 11 and the spacers 12 and 13, and
2 and 13.

Next, the spacer removal means 2 is attached to the spacer 1.
2, and the end face of the spacer connecting portion 121 is sealed by the spacer closing plate 22.
Next, the compressed air 3 is injected from the compressed air supply port 21 into the interior 16 of the connected body composed of the drum 11 and the pair of spacers 12 and 13. The compressed air 3 fills the interior 16 of the connecting body and removes the bond between the drum 11 and the spacers 12 and 13 by its pressure. As a result, the bond between the drum 11 and the spacers 12 and 13 is released. Therefore, the spacer 12 and the drum 11 can be separated smoothly and easily by the chuck 23. This separation operation is performed by opening the hand portion of the chuck 23 and pulling the spacer removing means 2 upward while bringing it into contact with the inner wall surface of the spacer 12.

Next, the drum 11 is separated from the spacer 13 by the robot hand, and the mounting table 15 is lowered. At this time, since the spacer 13 is held in that position by the coating means 142 in the coating liquid storage container 14, separation is performed smoothly and easily. By repeating the above steps, continuous coating on the drum 11 is performed.

(Effects of the Invention) As described above, the present invention allows the spacer and the drum to be separated smoothly and easily by removing the adhesion between the spacer and the drum caused by the coating process in a layered manner using compressed air. Ru. Thereby, continuous coating work can be performed smoothly. Furthermore, since the present invention has a simple configuration, separation operations can be performed quickly and easily.

[Brief explanation of drawings]

FIG. 1a is a front sectional view of essential parts showing an embodiment of the coating device and desorption means embodying the separation method of the present invention, and FIG. 1b is a front view showing the desorption means used in the above embodiment. , FIG. 2 is a front view of essential parts showing an example of a conventional coating device. 1... Coating device, 2... Spacer removal means,
3... Compressed air, 11... Drum, 12, 13...
... Spacer, 14 ... Coating liquid storage container, 15 ... Mounting table, 16 ... Inside of coupling body, 21
... Compressed air supply port, 22 ... Closure plate, 23 ...
Chuck, 122... Spacer opening end.

Claims (1)

[Scope of Claims] 1. A cylindrical drum whose outer peripheral surface is to be coated with a coating liquid; a pair of cylindrical spacers having the same outer diameter as the cylindrical drum and coaxially connected to both open ends of the cylindrical drum; A drum coating device having a coating liquid storage container disposed in contact with the outer circumferential surface of the cylindrical drum, the coating liquid is applied to the outer circumferential surface of the cylindrical drum while moving the cylindrical drum in the axial direction, and after drying, at least one cylindrical spacer is applied. In the method of separating the cylindrical drum from the cylindrical drum by means of spacer removal means, the inside of the connecting body consisting of the cylindrical drum and the pair of cylindrical spacers is maintained in an air-liquid tight state, and then the inside of the connecting body is compressed. Drum separation method including filling with air. 2. The separation method according to claim 1, wherein the spacer removing means includes a spacer closing plate and a chuck provided with a compressed air supply port. 3. The upper opening end of the connecting body is sealed by the closing plate of the detaching means, and the lower opening end of the connecting body is sealed by the mounting table via a sealing material, thereby making the inside of the connecting body airtight. A method of separation as claimed in the retained claims.