JP4872223B2 - Cylindrical base material holding jig, cylindrical base material transfer device, electrophotographic photoreceptor manufacturing apparatus and manufacturing method - Google Patents

Description

  The present invention relates to a cylindrical base material holding jig for gripping a cylindrical base material of an electrophotographic photosensitive member (photosensitive drum) applied to an image forming apparatus such as an electrophotographic copying machine. The present invention relates to a gripping jig for vertically gripping a base material when the cylindrical base material is immersed in a coating solution containing a photosensitive substance and a volatile solvent. The present invention also relates to a cylindrical substrate transfer device using the same and a method for producing an electrophotographic photosensitive member.

  In the coating process for forming a photosensitive layer of a photosensitive drum (electrophotographic photosensitive member) used in an electrophotographic copying machine, a cylinder is used as a method for applying a photosensitive layer forming coating to the outer peripheral surface of a cylindrical substrate (drum). A method is known in which the inside of a substrate is gripped and the drum is dipped in a photosensitive layer forming coating. In this dip coating method, in order to form a uniform photosensitive layer, it is necessary to hold the cylindrical inner surface in a sealed manner so that a stable cylindrical base material is gripped and the paint does not enter the inner surface of the cylindrical base material. A cylindrical base material gripping device having both performances is required.

  As the cylindrical substrate gripping device used in the dip coating, there are known an air chuck disclosed in Japanese Patent Laid-Open No. 10-194661, a gripping jig for squeezing and gripping an annular bag-shaped rubber, and the like.

  The air chuck is a structure that expands by inserting air into a rubber or the like in a cylindrical base material so that the diameter of the contact portion expands and is gripped. However, the air chuck requires piping for air introduction from the outside in addition to the gripping mechanism, which is difficult to use for pallets that are freely transferred on the conveyor, and the cost of the air chuck is high. There is.

  On the other hand, in the case of a gripping jig that crushes and grips an annular bag-shaped rubber, the annular bag-shaped rubber can be manufactured at a low cost, and no additional components are required, so a pallet that can be freely transferred on a conveyor, etc. Easy to use.

However, in recent years, the number of types of photosensitive drums used in electrophotographic copying machines that use a plurality of cylindrical substrates having different diameters has increased. In order to respond, the compression deformation width within the elastic limit is narrow, so a variety of annular bag-shaped rubber must be prepared, and the setup change must be made according to the diameter of each cylindrical base material. Stop time is required.
JP-A-10-194661

  Accordingly, an object of the present invention is to provide a cylindrical base material gripping jig having a high ability to cope with the inner diameter of a base material. Moreover, it is providing the cylindrical base material transfer apparatus using this cylindrical base material holding jig. Moreover, it is providing the manufacturing apparatus and manufacturing method of an electrophotographic photoreceptor using this cylindrical base material transfer apparatus.

The above problem is solved by the following means. That is,
The cylindrical base material holding jig of the present invention includes an annular bag-like member, inserts the bag-like member into the opening of the cylindrical base material, and changes the outer diameter to hold and hold the base material. Is a cylindrical base material gripping jig that releases
The bag-like member includes a cylindrical body portion, and two tubular portions respectively axially outwardly of the opposite ends of the tubular body portion are integrally formed, in the configuration, the axial during undeformed than the minimum outer diameter of the cylindrical portion is larger toward the maximum outer diameter of the cylindrical body portion, an enlarged outer diameter of the cylindrical body portion to compressive deformation in the axial direction, the cylindrical to tensile deformation in the axial direction The outer diameter of the trunk portion is contracted.

  In the cylindrical base material holding jig of the present invention, when a bag-like member having a maximum outer diameter at the central portion larger than the minimum outer diameter at both axial ends at the time of non-deformation is compressed and deformed in the axial direction, While the outer diameter of the portion expands, when the tensile deformation is performed, the outer diameter of the central portion approaches the minimum outer diameter of both ends and shrinks, so that the outer diameter change width increases and the inner diameter corresponding ability of the base material increases. .

  In the cylindrical substrate gripping jig of the present invention, the bag-shaped member is enlarged by reducing the distance between both ends within the elastic limit of the outer diameter of the central portion, and by expanding the distance between both ends within the elastic limit. It is preferable to shrink. In this way, by changing the distance between both ends within the elastic limit of the bag-like member and changing the outer diameter of the central portion, the substrate can be gripped and released efficiently and repeatedly.

  In the cylindrical base material holding jig according to the present invention, the bag-shaped member has an outer diameter ratio (maximum outer diameter / minimum outer diameter) between the minimum outer diameter at both ends in the axial direction and the maximum outer diameter at the center when not deformed. (Diameter) is preferably 1.5 or more. Thereby, a bag-shaped member becomes a structure with a large outer diameter change width of the center part accompanying compression and tension deformation.

  In the cylindrical base material holding jig of the present invention, it is preferable that the bag-shaped member is made of a rubber material. The rubber material can be repeatedly compressed and pulled by elastic deformation, and can be brought into close contact with the inner wall of the cylindrical base material. Therefore, the rubber material is optimal as a constituent material for the bag-shaped member.

  In addition, the cylindrical transfer device of the present invention supports the cylindrical base material gripping jig of the present invention and the cylindrical base material gripping jig and moves the gripped cylindrical base material. And mounting means.

  The cylindrical base material transfer device of the present invention has the cylindrical base material gripping jig of the present invention, which has a high ability to cope with the inner diameter of the base material, so that the cylindrical base materials having different outer diameters (inner diameters) can be efficiently used. Well, it becomes possible to transfer.

In addition, the method for producing an electrophotographic photosensitive member of the present invention uses a cylindrical substrate transfer device of the present invention to transfer a cylindrical substrate, and the photosensitive layer forming coating material is transferred to the cylindrical substrate. It is characterized by applying . The electrophotographic photoreceptor manufacturing apparatus of the present invention includes a coating apparatus for applying a photosensitive layer-forming coating material to a cylindrical base material, and a cylindrical base material transfer for transferring the cylindrical base material to the coating apparatus. a transfer device is characterized by comprising a cylindrical base material transfer device of the present invention.

  In the electrophotographic photoreceptor manufacturing apparatus and manufacturing method of the present invention, the cylindrical base material transfer apparatus of the present invention can be used to efficiently transfer cylindrical base materials having different outer diameters (inner diameters). As a result, it is possible to efficiently produce electrophotographic photosensitive members having different outer diameters (inner diameters).

  ADVANTAGE OF THE INVENTION According to this invention, the cylindrical base material holding jig with the high internal diameter corresponding | compatible capability of a base material can be provided. Moreover, the cylindrical base material transfer apparatus using this cylindrical base material holding jig can be provided. Moreover, the manufacturing method of the electrophotographic photoreceptor using this cylindrical base material transfer apparatus can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is provided to the member which has the substantially same function through all the drawings, and the overlapping description may be abbreviate | omitted.

(First embodiment)
FIG. 1 is a schematic cross-sectional view showing a cylindrical base material holding jig according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view showing a state in which the cylindrical base material holding jig according to the first embodiment of the present invention releases the grip on the cylindrical base material. FIG. 3 is a schematic cross-sectional view showing a state where the cylindrical base material holding jig according to the first embodiment of the present invention is holding the cylindrical base material. FIG. 4 is a perspective view showing a bag-like member of the cylindrical base material holding jig according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view showing a bag-like member of the cylindrical base material gripping jig according to the first embodiment of the present invention, and (A) is a cross-sectional view showing a normal state in which it is not elastically deformed, (B) is sectional drawing which shows the state which is tensile-elastically deformed, (C) is sectional drawing which shows the state which is compressively elastically deformed.

  As shown in FIG. 1, the cylindrical substrate gripping jig 10 according to the present embodiment includes a bag-like member 12, and a support member 14 for supporting and elastically deforming the bag-like member 12. It has.

  As shown in FIG. 4, the bag-shaped member 12 includes a cylindrical body 12 </ b> A and two cylindrical parts 12 </ b> B that are integrally formed at both ends on the outer side in the axial direction of the cylindrical body 12 </ b> A. . The two cylindrical portions 12B have a truncated cone shape in which the inner diameter dimension and the outer diameter dimension gradually decrease toward the outer side in the axial direction. Also, disk-shaped flanges 12C for supporting and fixing the bag-like member 12 are integrally formed on the outer sides in the axial direction of the two cylindrical portions 12B. An opening communicating with the opening of the cylindrical portion 12B (opening of the bag-like member 12) is provided at the substantially central portion of the flange 12C, and the bag-like member 12 is integrally formed in a bag shape including the flange 12C. Has been.

  As shown in FIG. 5, the bag-shaped member 12 when not deformed (original shape) is larger than the minimum outer diameter Y of the two cylindrical portions 12 </ b> B, and the maximum outer diameter of the cylindrical body 12 </ b> A. X is configured to be larger, and when it is pulled and deformed in the axial direction with respect to the non-deformed state (original form: FIG. 5A), the outer diameter X of the cylindrical body 12A is the same as that of the cylindrical part 12B. While shrinking while approaching the minimum outer diameter Y (at the time of tensile deformation: FIG. 5 (B)), the outer diameter X of the cylindrical body 12A is expanded when compressed and deformed in the axial direction (at the time of compressive deformation: FIG. 5 (C). )).

  For this reason, as for the bag-shaped member 12, the outer diameter change width of the cylindrical trunk | drum 12A is large. As a result, the cylindrical base material holding jig 10 has a high ability to handle the inner diameter of the base material.

  Here, in order to greatly change the outer diameter width of the cylindrical body portion 12A of the bag-like member 12, the bag-like member 12 at the time of non-deformation (original time) is the minimum outer diameter Y of the two cylindrical portions 12B. The outer diameter ratio (maximum outer diameter X / minimum outer diameter Y) of the cylindrical body portion 12A to the maximum outer diameter X is preferably 1.5 or more. The outer diameter ratio is preferably 1.8 to 2.5, more preferably 2.0 to 2.4. If this outer diameter ratio is too small, the amount of change in the outer shape of the bag-like member 12 becomes small. Conversely, if it is too large, the stability at the original shape may be deteriorated. In addition, the thickness of the bag-like member 12 can be appropriately set in consideration of the stability when not deformed and the degree of elastic deformation.

  The bag-like member 12 is configured by an annular body made of a rubber material. As the rubber material, for example, butyl rubber, fluororubber, silicone rubber, fluorosilicone rubber and the like are preferably mentioned. In particular, fluorosilicone rubber is preferred in consideration of solvent resistant environment and heat resistant environment. By forming the bag-like member 12 with such a rubber material, it can be repeatedly compressed and pulled by elastic deformation, and when the bag-like member 12 is elastically deformed, the cylindrical body 12A is gently curved. And can be brought into close contact with the inner wall of the cylindrical base material 30. Further, the outer diameter of the cylindrical body 12A of the bag-like member 12 can be changed with a large amount of change in diameter. The material constituting the bag-like member 12 is not limited to a rubber material, and is not particularly limited as long as the outer shape of the cylindrical body 12A is changed by compression / tensile deformation. For example, an elastic material or the like is used. Can be applied.

  On the other hand, as shown in FIG. 1, the support member 14 includes a lower plate 16 that fixes the lower end (downward in the drawing) of the bag-like member 12, an upper plate 18 that fixes the upper end (lower in the drawing) of the bag-like member 12, A center shaft 20 connected to the lower plate 16 in a state of being inserted into the bag-like member 12, and a guide shaft 22 connected to the upper plate 18 and surrounding the center shaft 20. . A compression spring 24 is provided above the center shaft 20 (upward in the drawing) to push up the lower plate 16 via the center shaft 20.

  The compression spring 24 is sandwiched between a base plate 26 connected to the upper end of the guide shaft 22 and a support plate 28 connected to the upper end of the center shaft 20. A plurality of cylindrical base material gripping jigs 10 may be connected to the base plate 26, and the cylindrical base material gripping jigs 10 are provided in the cylindrical base material transfer device via the base plate 26.

  In order to grip the cylindrical base material 30 with the cylindrical base material gripping jig 10, first, a load is applied to the support plate 28 by an external force such as an air cylinder. Then, as shown in FIG. 2, the compression spring 24 is contracted, the lower plate 16 is pushed downward together with the center shaft 20 (in the direction of the arrow), and the bag-like member 12 fixed at both ends is expanded at both ends and the elastic limit is reached. The outer diameter of the cylindrical body 12A is reduced by being pulled and deformed inside. In this state, the bag-like member 12 is inserted into the cylindrical base material 30 from the opening.

  Next, as shown in FIG. 3, when the external force load on the support plate 28 is released with the bag-like member 12 inserted into the cylindrical base material 30 through the opening, the center shaft is driven by the force of the compression spring 24. 20 and the lower plate 16 is pushed upward (in the direction of the arrow), and the bag-like member 12 having both ends fixed is compressed at the both ends to be compressed within the elastic limit, and the outer diameter of the cylindrical body 12A is reduced. Expands. Thereby, the bag-shaped member 12 can hold the cylindrical base material 30 by pressing the cylindrical body portion 12 </ b> A against the inner wall of the cylindrical base material 30.

  And in order to cancel | release the holding | grip to the cylindrical base material 30 by the cylindrical base material holding jig 10, as mentioned above, a load is loaded on the support plate 28, and the cylindrical trunk | drum of the bag-shaped member 12 is carried out. The outer diameter of 12A is reduced, and the press contact of the cylindrical body portion 12A of the bag-like member 12 to the inner wall of the cylindrical base material 30 is released.

  In this way, the cylindrical substrate 30 is repeatedly held and released from the cylindrical substrate 30 by the cylindrical substrate holding jig 10.

  In the cylindrical base material holding jig 10 according to the present embodiment described above, the bag-like member 12 having a larger maximum outer diameter at the central portion than a minimum outer diameter at both end portions in the axial direction at the time of non-deformation is provided. , Fix both ends. And if it compresses and deforms to an axial direction within an elastic limit so that the distance of both ends may be shortened, the outer diameter of 12 A of cylindrical trunk | drums will expand. On the other hand, if the tensile deformation is performed within the elastic limit so as to increase the distance between both ends, the outer diameter of the cylindrical body 12A approaches the minimum outer diameter of the cylindrical part 12B and contracts. For this reason, the amount of change in the outer shape of the cylindrical body 12A of the bag-like member 12 is large, and the inner diameter handling capability of the base material is increased. Moreover, since both ends distance is changed within the elastic limit of the bag-shaped member 12, and the outer diameter of the center part is changed, the cylindrical base material 30 can be gripped and released efficiently and repeatedly.

(Second Embodiment)
FIG. 6 is a schematic configuration diagram showing a cylindrical substrate transfer device according to the second embodiment of the present invention.

  The cylindrical substrate transfer device 32 according to the present embodiment includes the cylindrical substrate holding jig according to the first embodiment. FIG. 6 also shows a coating device 44 for producing an electrophotographic photosensitive member using a cylindrical substrate transfer device, and the one provided with the coating device 44 corresponds to an electrophotographic apparatus manufacturing apparatus. To do. Hereinafter, together with the cylindrical substrate transfer device 32 according to the present embodiment, a manufacturing apparatus and a manufacturing method of an electrophotographic photosensitive member using the same will be described.

  As shown in FIG. 6, the cylindrical base material transfer device 32 according to the present embodiment includes a cylindrical base material gripping jig 10 and an elevating and traversing device 34 (moving means) that supports and moves the cylindrical base material holding jig 10. It is configured. In the elevating / lowering device 34, five cylindrical base material gripping jigs 10 are connected to the same base plate 26, and after gripping the cylindrical base material 30, five cylindrical base materials are interposed via the base plate 26. The five cylindrical base materials 30 can be transferred by moving the gripping jig 10 by the elevating and traversing device 34.

  Here, five cylindrical base material gripping jigs 10 are provided so that five cylindrical base materials 30 can be transferred, but the number of cylindrical base material gripping jigs 10 is not limited. Of course, it can be set arbitrarily. Further, an air cylinder 36 for loading a load on the cylindrical base material holding jig 10 (support plate 28) is provided in connection with the pressing plate 38.

  In FIG. 6, reference numeral 40 denotes a pallet on which the cylindrical base material 30 is placed, and 42 denotes a conveyor that conveys the pallet. Further, the coating device 44 is provided with a coating tank 46 filled with a photosensitive layer forming paint, and the photosensitive layer forming paint overflows into an external tank 48 provided around the coating tank 46, and enters the reservoir tank 50. It is circulated so as to be supplied again to the application tank 46 by the pump 52.

  In the cylindrical base material transfer device 32 according to the present embodiment, for example, after the pallet 40 on which the cylindrical base material 30 is placed is conveyed to a predetermined position by the conveyor 42, the cylinder is transferred by the air cylinder 36 via the pressing plate 38. The cylindrical base material holding jig 10 (supporting plate 28) is loaded with a heavy load, and the cylindrical base material holding jig 34 is moved by the elevating / lowering device 34 in a state where the outer diameter of the cylindrical body 12A of the bag-like member 12 is reduced. 10 is lowered, and the bag-shaped member 12 of the cylindrical base material gripping jig 10 is inserted into the opening of the cylindrical base material 30.

  Next, in this inserted state, the load from the air cylinder 36 is released, the outer diameter of the cylindrical body portion 12A of the bag-shaped member 12 is expanded, and the cylindrical body whose outer diameter is expanded to the inner wall of the cylindrical base material 30. The part 12A is in close contact. In this way, the cylindrical base material 30 is gripped by the cylindrical base material gripping jig 10. In this state, the cylindrical base material holding jig 10 is moved above the coating device 44 (coating tank 46) by the elevating and traversing device 34, and then the cylindrical base material 30 thus gripped is applied to the coating device 44 (coating device). It is lowered until it is immersed in the photosensitive layer forming paint in the tank 46) and then slowly raised.

  By the above operation, the photosensitive layer is formed on the outer peripheral surface of the cylindrical substrate 30. At this time, since the inner peripheral surface of the cylindrical base material 30 is sealed by the bag-like member 12 of the cylindrical base material holding jig 10, there is no penetration of the photosensitive layer forming paint.

  Then, after applying the photosensitive layer to the cylindrical base material 30, the cylindrical base material holding jig 10 is moved onto the conveyor 42 by the elevating and lowering device 34, and the cylindrical base material 30 can be delivered to the pallet 40. To lower. In this state, a load is applied to the cylindrical base material holding jig 10 (support plate 28) by the air cylinder 36, and the outer diameter of the cylindrical body portion 12A of the bag-like member 12 is reduced. Thereby, the holding of the cylindrical base material 30 is released, and the cylindrical base material 30 is delivered to the pallet 40.

  In this manner, the cylindrical base material is transferred, and the application of the photosensitive layer forming paint to the cylindrical base material 30 is completed. Thereafter, the cylindrical base material 30 is subjected to various processes such as drying of the coating film, and an electrophotographic photosensitive member is manufactured.

  When producing an electrophotographic photosensitive member, it is common to apply three coating layers for forming a photosensitive layer. In that case, the cylindrical base material 30 may be transferred to three coating steps, but in this embodiment, the cylindrical base material gripping jig 10 moves freely while gripping the cylindrical base material 30. Therefore, it is possible to apply three layers in succession while the cylindrical base material holding jig 10 holds the cylindrical base material 30.

  In the cylindrical base material transfer device 32 according to the present embodiment described above, the cylindrical base material gripping jig 10 according to the first embodiment is applied. Thus, the cylindrical base material 30 having different inner diameters can be gripped. As described above, the conventional bag-shaped member 12 is prepared for each cylindrical base material 30 diameter, and the setup change must be performed corresponding to each cylindrical base material 30 diameter. In the embodiment, the cylindrical base material 30 having a plurality of diameters can be gripped by one type of bag-like member 12, so that the number of setup change work steps and the setup change process stop time are reduced, and the cylindrical base material 30 having different inner diameters is efficiently used. Can be transferred well.

  Then, by applying the cylindrical substrate transfer device 32 to the photosensitive layer coating step in the method for producing an electrophotographic photosensitive member, it becomes possible to efficiently produce electrophotographic photosensitive members having different inner diameters. In addition, since the inner peripheral surface of the cylindrical base material 30 is tightly held by the bag-like member 12 made of a rubber material, it is applied without applying the coating material for forming the photosensitive layer on the inner surface of the cylindrical base material 30. Is possible.

  In addition, since the cylindrical base material holding jig 10 and the cylindrical base material transfer device 32 according to the present embodiment have a high capability to cope with the diameter of the cylindrical base material 30, it is possible to reduce the number of components attached thereto. It can be configured at low cost.

(Test example)
-Test Example 1
A bag-like member 12 having dimensions according to Table 1 was produced by injection molding a rubber material (fluorosilicone rubber) (see FIG. 4). The bag-like member 12 was fixed at both ends in the axial direction, subjected to compression deformation and tensile deformation, and the outer diameter of the cylindrical body 12A at that time and the amount of change were examined. The force applied during compression deformation was set to 5 kgf (49 N) within the elastic limit, and the force applied during tensile deformation was set to 20 kgf (196 N) within the elastic limit.

  Further, as a comparative example, a cylindrical bag-like member 120 having a constant outer diameter along the axial direction as shown in FIGS. The force applied during compression deformation was set to 5 kgf (49 N) within the elastic limit, and the force applied during tensile deformation was set to 10 kgf (98 N) within the elastic limit. Here, FIG. 7 is a perspective view showing a bag-like member of a conventional cylindrical expected gripping jig. FIG. 8 is a cross-sectional view showing a bag-like member of a conventional cylindrical base material holding jig, (A) is a cross-sectional view showing a non-deformed state, and (B) is tensile elastically deformed. It is sectional drawing which shows a state, (C) is sectional drawing which shows the state which is carrying out the compression elastic deformation.

  These results are shown in Table 1.

  From the results of Table 1, the bag-shaped member 120 of the comparative example expands in outer diameter during compression deformation, but hardly changes in outer diameter during tensile deformation, and the outer diameter change amount is 7 mm. In the bag-shaped member 12, it can be seen that a result of changing twice to 14 mm was obtained.

  And in consideration of the fact that a clearance with the cylindrical base material is necessary to insert the bag-like member 12 into the cylindrical base material 30, in the comparative example of the cylindrical base material gripping jig, While this embodiment can cope with a cylindrical substrate having a diameter of Φ23 to 28.5 mm, the present embodiment shows a result that can be applied to gripping a cylindrical substrate with an inner diameter of Φ18.5 to Φ30 mm.

  Further, many electrophotographic photoreceptors (photoreceptor drums) generally have a cylindrical substrate diameter (drum diameter) of Φ20, 24, 30 mm. In order to cope with the three types of diameters, it is necessary to prepare a bag-like member for each of the three types and perform setup change. On the other hand, in this embodiment, it can respond with one kind of bag-shaped member, and it becomes unnecessary to perform setup change.

-Test Example 2-
Next, a bag-like member 12 having dimensions according to Table 2 was produced by injection molding a rubber material (fluorosilicone rubber) (see FIG. 4). The bag-like member 12 was fixed at both ends in the axial direction, subjected to compression deformation and tensile deformation, and the outer diameter of the cylindrical body 12A at that time and the amount of change were examined. The force applied during the compression / tensile deformation is the same as in Test Example 1.

  From the results of Table 2, it can be seen that the outer diameter change amount varies depending on the shape of the bag-like member. It can be seen that the result of type C / D / E is good in order to obtain a good reduction in outer diameter at the time of tensile deformation and to increase the amount of external change. From these, it can also be seen that the bag-like member can obtain a good width of diameter change when the ratio of the maximum outer diameter X and the minimum outer diameter Y in the original shape is 1.5 or more.

  In addition, this invention is not limited only to this embodiment demonstrated above, Of course, it can change suitably within the range which does not deviate from a summary, and can be implemented.

It is a schematic sectional drawing which shows the cylindrical base material holding jig which concerns on 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state which the cylindrical base material holding jig which concerns on 1st Embodiment of this invention canceled the holding | grip to a cylindrical base material. It is a schematic sectional drawing which shows the state which the cylindrical base material holding jig which concerns on 1st Embodiment of this invention is holding the cylindrical base material. It is a perspective view which shows the bag-shaped member of the cylindrical base material holding jig which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the bag-shaped member of the cylindrical base material holding jig which concerns on 1st Embodiment of this invention, (A) is sectional drawing which shows the normal state which is not elastically deformed, (B) It is sectional drawing which shows the state which is tensile-elastically deformed, (C) is sectional drawing which shows the state which is compressively elastically deformed. It is a schematic block diagram which shows the cylindrical base material transfer apparatus which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the bag-shaped member of the conventional cylindrical expected holding | grip jig | tool. It is sectional drawing which shows the bag-shaped member of the conventional cylindrical base material holding jig, (A) is sectional drawing which shows the state at the time of non-deformation, and (B) is a cross section which shows the state which is tensile-elastically deforming It is a figure, and (C) is a sectional view showing the state where compression elastic deformation is carried out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cylindrical base-material holding jig 12 Bag-shaped member 12A Cylindrical trunk | drum 12B Cylindrical part 12C Flange 14 Support member 16 Lower plate 18 Upper plate 20 Center shaft 22 Guide shaft 26 Base plate 28 Support plate 30 Cylindrical base material 32 Cylinder Substrate transfer device 34 Elevating and lowering device 36 Air cylinder 38 Press plate 40 Pallet 42 Conveyor 44 Coating device

Claims (7)

A cylindrical base material holding jig that includes an annular bag-like member, inserts the bag-like member into the opening of the cylindrical base material, and changes the outer diameter to grip and release the base material. There,
The bag-shaped member is composed of a cylindrical body part and two cylindrical parts integrally formed at both ends on the axially outer side of the cylindrical body part, and the axial direction when not deformed. The maximum outer diameter of the cylindrical body is larger than the minimum outer diameter of the cylindrical part. A cylindrical base material gripping jig characterized in that an outer diameter of a body portion contracts. The bag-like member, according to claim 1, the outer diameter of the central portion is enlarged by reducing the distance between both ends in the elastic limit, characterized in that it shrinks by expanding the distance between both ends in the elastic limit cylindrical base material gripping jig.   The bag-like member has an outer diameter ratio (maximum outer diameter / minimum outer diameter) of 1.5 or more between the minimum outer diameter at both ends in the axial direction and the maximum outer diameter at the center when not deformed. The cylindrical base material holding jig according to claim 1.   The cylindrical base material holding jig according to claim 1, wherein the bag-shaped member is made of a rubber material.   A cylindrical substrate gripping jig according to any one of claims 1 to 4, and a transfer means for supporting the cylindrical substrate gripping jig and moving the gripped cylindrical substrate. A cylindrical substrate transfer device comprising: An electrophotographic photosensitive member, comprising: transferring a cylindrical base material using the cylindrical base material transfer device according to claim 5; and applying a coating material for forming a photosensitive layer to the cylindrical base material. Manufacturing method. 6. A cylinder according to claim 5 , which is a coating device for applying a photosensitive layer forming coating material to a cylindrical base material, and a cylindrical base material transfer device for transferring the cylindrical base material to the coating device. apparatus for producing an electrophotographic photosensitive member, characterized in that it comprises a Jomotozai transfer device.

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