JP2000042968A - Chucking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chucking device capable of chucking even in the case of providing a protrusion or the like in a workpiece internal peripheral surface, and capable of preventing infiltration of liquid of a photosensitive member in this internal peripheral surface by sealing hermetically a pipe inside thereof. SOLUTION: A disk 10 fixing a solvent resistant elastic member 10a to a lower surface is provided around a chuck shaft 6 in the upward of a link type chuck 8 opening/closing an arm 8a in a radial direction, and an upper end of an element pipe 1 is pressed to this elastic member 10a by chucking action, so as to provide a mechanism capable of sealing hermetically a pipe inside in the upper end of the element pipe 1 by fixedly holding an attitude of the element pipe 1. The pressure contact of the arm 8a with a position avoiding a protrusion 1b in an internal peripheral surface of the element pipe 1 enables chucking without be affected by the protrusion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for producing a photosensitive drum used in an electrophotographic copying machine, a printer, a facsimile machine, or the like, by picking the produced photosensitive drum or a raw tube as a raw material thereof. The present invention relates to a chucking device for a transfer machine that transfers a document.

[0002]

2. Description of the Related Art Conventionally, such a photosensitive drum has been
It is produced by the following production process. FIG. 1 is a flow chart and a schematic view showing an outline of a production process of a photosensitive drum. In the figure, first, a raw tube 1 which is a raw material of a photosensitive drum is put into a production process. This is, for example, about 60 to 300 mm in diameter and 600 m in length.
Extruded aluminum pipes of up to about m are cut and finished. Next, in a high-pressure cleaning step, high-pressure detergent or the like is sprayed on the outer peripheral surface and the inner peripheral surface while rotating and moving the raw tube 1 up and down to remove dust adhering to the surface and oily oil during cutting.

[0003] In the ultrasonic cleaning step, ultrasonic cleaning is performed in a detergent to degrease. Further, in the brush cleaning step, the outer peripheral surface of the raw tube 1 is rubbed and washed with the rotating brush 2 to remove adhered foreign substances and the like. When degreasing and polishing by washing are completed in this way, in the rinsing step, clean air is blown into pure water to perform bubbling, and rinsing is performed using the burst of the bubbles. Next, in a warm water pulling-up step, the surface of the pipe 1 is drained by slowly pulling up the raw tube 1 from pure water whose surface tension has been reduced by heating.

[0004] When the above-described cleaning step is completed, first, in a drying step, the atmosphere is heated at 130 to 140 ° C in an atmosphere.
Removes water adsorbed on the surface. Next, in a coating process, the element tube 1 whose upper end is sealed is dipped (immersed) in the liquid of the photoreceptor that has been prepared and circulated, leaving the upper end, and the outer peripheral surface is coated with the photoreceptor. . And in the lower end peeling step,
The photosensitive member applied to the outer peripheral surface and the inner peripheral surface of the lower end of the raw tube 1 is peeled off.

[0005] Further, in the heat treatment step, the raw tube 1 is gradually heated with a temperature gradient to remove the solvent in the coated photoreceptor while preventing so-called bubble defects from occurring, thereby solidifying the photoreceptor. All of the above steps are performed in a clean room. Finally, an appearance inspection is performed in an inspection process, and a flange is attached to both ends of the completed photosensitive drum in an assembling process, and the photosensitive drum is packed and stored.

Incidentally, a transfer machine has been conventionally used for picking and transferring the raw tube 1 (or the completed photosensitive drum) between apparatuses for performing the above-described steps. FIG. 2 is a diagram schematically showing a configuration of a chucking device portion of the transfer machine in a certain process. In the figure, 7 is a chuck fixing portion on the transfer machine side that moves up and down in the direction of the arrow, 6 is a chuck shaft that supports the chuck, 5 is a chuck that picks up the tube 1, and 4 is a guide that guides the chuck 5 to the tube 1. For this reason, the guide has a tapered tip. Reference numeral 3 denotes a retainer provided on a box or a pallet for transporting the raw tube 1 and holding the raw tube 1 in an upright state.

The chuck 5 shown in FIG. 1 is generally called an air picker or the like, and expands and contracts by putting air into and out of a balloon made of an elastic material such as rubber. Then, the raw tube 1 is picked on its inner peripheral surface. However, the present invention is not limited to this type. For example, as shown in FIG. 3, a link type chuck 8 that opens and closes the arm 8a in the radial direction may be used.

FIG. 2 shows a specific picking procedure.
In a state where the chuck 5 is contracted, the chuck fixing portion 7 is lowered, and the raw tube 1 is guided by the guide 4.
Insert the chuck 5 from the upper end of the. And chuck 5
Is expanded to chuck the tube 1 from its inner peripheral surface,
Similarly, the chuck fixing part 7 is raised to lift the raw tube 1. Thereafter, the raw tube 1 is transferred to an apparatus for performing another process by a transfer machine (not shown) having the chuck fixing portion 7 as a part. In some cases, the completed photosensitive drums may be handled instead of the raw tube 1, and these are collectively called a work.

In the above-described production process, it is necessary to keep the posture constant while the workpiece is being chucked. For this reason, conventionally, the posture control is performed by pressing the upper end portion of the work against, for example, a flat plate (not shown) provided on the chuck shaft 6 and regulating the inner surface of the work with the clearance of the chuck body.

[0010] Further, in particular, Japanese Patent Application Laid-Open No. Sho 59-4466 discloses a method for performing chucking in the coating step.
As described in Japanese Patent Application Laid-Open No. 4468/1992, as a gripping device for a cylindrical body (work), a rod, a mechanism for suspending and supporting the rod, and a gripping mechanism provided at the lower end of the rod and closely attached to the inner wall of the cylindrical body are provided. The disclosed invention is disclosed. This gripping mechanism has a lid as a posture control member that fits into the tubular body as required. Japanese Utility Model Laid-Open No. 63-94569 also discloses a device having a structure similar to that of the above invention.

However, as described above, since the work is cylindrical, for example, a base tube having a diameter of 30 mm and having a small thickness of 0.75 mm, the work is actually used as a photosensitive drum in a copying machine, for example. During operation, the blade may resonate due to the cleaning blade pressed against it, and may be a source of abnormal noise. In the above-described assembling process, the flanges are press-fitted at both ends of the completed photosensitive drum.
Since the rotating torque generated between the flanges cannot be tolerated and there is a risk of idling, it is necessary to add another fixing means such as bonding. Then, the number of assembling steps and material costs increase, and recycling becomes difficult.

Therefore, conventionally, as shown in FIG. 4, for example, a mold for manufacturing an extruded material or a drawn material in which a plurality of rib-shaped projections 1b are formed on the inner peripheral surface of the raw tube 1 is used. A method has been proposed. As a result, the mass and strength of the photosensitive drum are increased, so that the generation of abnormal noise due to the resonance can be prevented, and the rotation torque can be received by the projection 1b, so that the idling can also be prevented. . Further, the inner peripheral surface is not limited to the protrusion, and may have another shape. However, in this case, the material cost of the raw tube 1 is considerably increased.

[0013]

However, as described above, when a balloon-shaped chuck is inflated and pressed against the inner peripheral surface of the raw tube 1 for chucking, the chuck is placed on the inner peripheral surface of the raw tube 1. If there is such a protrusion 1b, it becomes difficult to chuck the inner peripheral surface and to seal the inside of the pipe. That is, during the dip coating of the photoconductor in the coating step, air in the tube leaks out, and the liquid of the photoconductor penetrates to the inner peripheral surface of the raw tube 1. In view of the above problems, the present invention enables chucking even when there is a protrusion or the like on the inner peripheral surface of the work, and seals the inside of the tube to prevent the liquid of the photoconductor from penetrating into the inner peripheral surface. It is an object of the present invention to provide a chucking device capable of preventing the occurrence.

[0014]

In order to achieve the above object, according to the present invention, a plate having an abutting surface that abuts on an upper end surface of a cylindrical member is provided around a chuck shaft, and the plate is provided at the lower end of the chuck shaft so as to be freely opened and closed. And a link-type chuck for holding the inner peripheral surface of the cylindrical member, wherein a solvent-resistant elastic member is attached to the contact surface.

Alternatively, a lid having a tapered contact portion in contact with the upper end surface of the cylindrical member is provided around the chuck shaft, and a link type for holding the inner peripheral surface of the cylindrical member at the lower end of the chuck shaft so as to be freely opened and closed. A chucking device provided with a chuck, wherein the contact portion is coated with a solvent-resistant elastic member.

Further, when the link type chuck holds the cylindrical member, the link-type chuck presses against the inner peripheral surface while avoiding the protrusion provided on the inner peripheral surface of the cylindrical member, and pulls the cylindrical member upward. It is assumed to be a configuration.

Further, the cylindrical member is a photosensitive drum or a raw tube as a raw material thereof.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a diagram schematically illustrating an embodiment of the chucking device of the present invention.
FIG. 3 shows a state where the chuck is inserted into the work. As shown in FIG. 1A, a disk 10 having an elastic member 10a attached to the lower surface is provided around the chuck shaft 6 above the link type chuck 8 for opening and closing the arm 8a in the radial direction. By pressing the upper end of the raw tube 1 against the elastic member 10a by the chucking operation, the posture of the raw tube 1 is kept constant.

Further, with this configuration, the inside of the tube can be sealed at the upper end of the tube 1, so that the inside of the tube remains filled with air during the dip coating of the photoreceptor in the above-mentioned coating process. It is possible to prevent the liquid of the photoreceptor from entering the inner peripheral surface of the tube 1. The elastic member 10a is made of a solvent-resistant material that is not eroded by the liquid of the photoconductor. Reference numeral 11 denotes a joint for connecting the link type chuck 8 and the chuck shaft 6.

Further, as shown from the axial direction in FIG. 2B, by pressing the arm 8a to a position avoiding the projection 1b on the inner peripheral surface of the raw tube 1, the arm 8a is not affected by such a projection. Chucking can be performed. In the figure,
Protrusions 1 arranged at three locations at substantially equal angles on the inner peripheral surface of the base tube 1
The three arms 8a are in a state where they are pressed against each other in the middle of each of b. Reference numeral 8e in the center of the figure denotes a fixed nose connected to the chuck shaft 6 by a joint 11, and a link 8b extending therefrom opens and closes an arm 8a connected to the tip thereof to perform a chucking operation. It is. Details will be described later.

FIG. 6 is a diagram schematically showing another embodiment of the chucking device of the present invention. FIG. 3 shows a state where the chuck is inserted into the work. As shown in the figure, a lid 9 having a tapered contact portion is provided around the chuck shaft 6 above the link type chuck 8, and the upper end of the raw tube 1 is tapered by a chucking operation. By pressing against the abutting portion, the posture of the raw tube 1 is kept constant. According to this configuration, it is possible to obtain a more accurate and stable posture of the work than in the case of the above-described one embodiment. The configuration of the link chuck 8 is the same as that of the above-described embodiment.

FIG. 7 is a schematic diagram showing the relationship between the lid 9 and the upper end of the raw tube 1 during chucking. When the raw tube 1 is pulled upward by the above-mentioned chucking operation, as shown in the figure, the tapered portion 1a provided on the inner circumference of the upper end of the raw tube 1 and the upper end of the projection 1b becomes the tapered contact portion of the lid 9. By following 9a, the horizontal position of the raw tube 1 and the inclination with respect to the vertical direction are regulated, and the posture of the raw tube 1 is kept constant. The tapered portion 1a is normally provided as a guide for fitting at the time of attaching flanges to both ends of a photosensitive drum completed in the assembling process of the above-described production process.

If the contact portion 9a is coated with an elastic member such as rubber, the inside of the tube can be sealed at the upper end of the raw tube 1. Therefore, during the dip coating of the photoreceptor in the above-mentioned coating process, the inside of the tube is blown with air. Since the state is kept filled, the infiltration of the liquid of the photoconductor into the inner peripheral surface of the raw tube 1 can be prevented. As the elastic member to be coated,
A solvent-resistant material that is not eroded by the photoconductor liquid is used.

FIG. 8 is a diagram schematically showing the structure of the link chuck of the chucking device of the present invention. Here, a specific example of the link type chuck 8 is shown.
(A) is a closed state, (b) is an opened state and the raw tube 1 is chucked on its inner peripheral surface. In the figure, 8e
Is a fixed nose provided on the chuck shaft 6 side, 8a
Is an arm for chucking a workpiece, 8b is a link, 8
c is a slide shaft, and 8d is a drive nose. The link 8b is rotatably connected to the arm 8a and the fixed nose 8e or the driving nose 8d at both ends thereof. Here, the guide 4 is omitted.

Further, the slide shaft 8c is slidable with respect to the fixed nose 8e, and is moved in and out by the action of a drive unit (not shown). Now, when the link type chuck 8 is inserted into the raw tube 1 in the state of (a), the slide shaft 8c is pulled into the fixed nose 8e, and the drive nose 8d approaches the fixed nose 8e, as shown in the state of (b). Link 8b to
Is opened, the arm 8a is pushed obliquely upward, and the pipe 1
Is pulled upward while chucking on the inner peripheral surface.
As long as the opening and closing action allows the chucking to be performed in accordance with the diameter of the workpiece, the elastic member 10a or the tapered abutting portion 9a is sufficiently dimensioned so that the chuck does not need to be replaced. .

[0026]

As described above, according to the present invention,
Provided is a chucking device capable of chucking even when there is a protrusion or the like on the inner peripheral surface of the work, and capable of sealing the inside of the tube and preventing the liquid of the photoconductor from entering the inner peripheral surface. Can do things.

[Brief description of the drawings]

FIG. 1 is a flowchart and a schematic diagram showing an outline of a production process of a photosensitive drum.

FIG. 2 is a diagram schematically showing a configuration of a conventional chucking device portion of a transfer machine.

FIG. 3 is a diagram showing an example using a link type chuck.

FIG. 4 is a view showing a state in which rib-like projections are provided on the inner peripheral surface of the raw tube.

FIG. 5 is a diagram schematically showing an embodiment of the chucking device of the present invention.

FIG. 6 is a view schematically showing another embodiment of the chucking device of the present invention.

FIG. 7 is a schematic diagram showing a relationship between a lid and an upper end of a raw tube at the time of chucking.

FIG. 8 is a diagram schematically showing a configuration of a link chuck.

[Explanation of symbols]

 Reference Signs List 1 base pipe 1a taper portion 1b projection 6 chuck shaft 8 link type chuck 8a arm 8b link 8c slide shaft 8d drive nose 8e fixed nose 9 lid 9a contact portion 10 disk 10a elastic member 11 joint

Continuation of the front page F term (reference) 2H068 EA05 EA12 3C016 CB07 CC02 CE03 3F061 AA01 BB10 BC09 BE43 BF00 DB00 DB06 4F040 AA07 BA47 CC15 CC20

Claims (4)

[Claims] 1. A plate having an abutment surface in contact with an upper end surface of a cylindrical member is provided around a chuck shaft, and a link type chuck is provided at a lower end of the chuck shaft so as to freely open and close the inner peripheral surface of the cylindrical member. A chucking device, wherein a solvent-resistant elastic member is attached to the contact surface. 2. A link type in which a lid having a tapered abutting portion that abuts on an upper end surface of a cylindrical member is provided around a chuck shaft, and a lower end of the chuck shaft holds an inner peripheral surface of the cylindrical member openably and closably. A chucking device provided with a chuck, wherein the contact portion is coated with a solvent-resistant elastic member. 3. When the link-type chuck holds the cylindrical member, the link-type chuck presses against the inner peripheral surface while avoiding a protrusion provided on the inner peripheral surface of the cylindrical member, and pulls the cylindrical member upward. 3. A structure according to claim 1, wherein the structure is a structure.
3. The chucking device according to claim 1. 4. The chucking device according to claim 1, wherein the cylindrical member is a photosensitive drum or a raw tube as a raw material thereof.