Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors 
  • B65G39/02—Adaptations of individual rollers and supports therefor

Definitions

• the present invention is used, for example, inside a belt for OA equipment (transfer belt, intermediate transfer belt, photoreceptor belt, etc.) and has an adhesive interposed between a roller core metal surface and a cylindrical rubber layer inner peripheral surface. This is related to a rubber roller that can be fitted (press-fit).
• a roller core is inserted into a through hole of the core of the cylindrical rubber layer, and an adhesive is interposed between the surface of the core and the inner peripheral surface of the rubber layer. It was known that it was fitted.
• the adhesive is interposed between the roller core metal surface and the inner peripheral surface of the rubber layer, so that the rubber layer can secure idling torque with respect to the core metal, and the rubber layer slips.
• the present inventor has conducted intensive studies in view of the above points, and found that the hardness of the rubber constituting the cylindrical rubber layer, the thickness of the rubber layer, and the inner diameter elongation of the rubber layer when the roller core is fitted to the optimum values are determined.
• the adhesive is interposed between the roller core metal surface and the inner peripheral surface of the rubber layer.
• the present inventors have found that a rubber roller having the same level of function as an existing adhesive product can be produced, and have completed the present invention.
• An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a fitting type rubber roller in which no adhesive is interposed between the surface of the roller core metal and the inner peripheral surface of the rubber layer.
• the torque between the belts is sufficiently large to prevent the occurrence of belt drive failure, and the occurrence of image transfer failure due to the twisting of the rubber layer due to insufficient torque, and further, for example, the rubber layer is defective.
• the present invention relates to a rubber roller comprising a roller core and a cylindrical rubber layer covering the surface thereof, wherein the rubber constituting the rubber layer has a hardness (JIS-JIS) of 40 ° to 90 °, and a rubber layer.
• JIS-JIS hardness
• a rubber layer Has a thickness of 0.3 mm to 3 mm, and a roller core is inserted into the through hole of the core of the rubber layer without interposing an adhesive between the surface of the core and the inner peripheral surface of the rubber layer. It is characterized in that the inner layer elongation rate of the rubber layer at the time of gold fitting is 4% to 15%.
• the hardness (JIS-A) of the rubber constituting the cylindrical rubber layer is from 40 ° to 90 °, preferably from 40 ° to 80 °.
• the hardness of the rubber constituting the rubber layer is less than 40 °, it is not preferable because the inner diameter elongation rate must be extremely large in order to obtain a sufficient idling torque.
• the higher the rubber hardness the greater the idling torque. If the rubber hardness exceeds 90 °, it is difficult to insert the roller core into the core metal through-hole of the cylindrical rubber layer, which is not preferable.
• the thickness of the rubber constituting the cylindrical rubber layer increases, but the thickness of the rubber layer is 0.3 mm to 3 mm, preferably 0.5 mm to 3 mm.
• the thickness of the rubber layer is less than 0.3 mm, the idling torque decreases, which is not preferable. If it exceeds 3 mm, the dimensional change due to the temperature of the rubber layer adversely affects the belt feed amount, which is not preferable.
• the roller core is inserted into the through hole of the core of the cylindrical rubber layer without interposing an adhesive between the surface of the core and the inner peripheral surface of the rubber layer.
• the elongation of the inner diameter of the rubber layer at that time is 4% to 15%, preferably 4% to 12%.
• the elongation ratio of the inner diameter of the cylindrical rubber layer when the core metal is fitted is less than 4%, because the idling torque becomes small. If the rate of elongation of the inner diameter of the rubber layer exceeds 15%, it is difficult to insert the roller core into the core metal insertion hole of the rubber layer, which is not preferable.
• the surface roughness (Rz) of the inner peripheral surface of the rubber layer covering the surface of the roller core is 0.5 / m to 5; m, and preferably lzm to 5 ⁇ m.
• the surface roughness (Rz) of the inner peripheral surface of the rubber layer is less than 0.5 m, it is considered that the idling torque increases, but it is not practical and is not preferable. If the surface roughness (Rz) of the inner peripheral surface of the rubber layer exceeds 5 m, the adhesion of the rubber layer to the surface of the roller core becomes poor, the idling torque decreases, and slip of the rubber layer cannot be prevented. Therefore, it is not preferable.
• the surface roughness (R a) of the roller core fitted into the cored through hole of the cylindrical rubber layer is 0.2! 1.1.6 ⁇ m, preferably 0.3 ⁇ l.l.6 ⁇ m.
• the roller core must be mirror-finished, and the cost is relatively high. If the surface roughness (R a) of the roller core exceeds 1.6 m, the adhesion of the roller core to the inner peripheral surface of the rubber layer becomes poor, and the idling torque decreases, which is not preferable.
• the rubber constituting the rubber layer of the rubber roller according to the present invention includes EPM (ethylene-propylene copolymer), EPDM (ethylene propylene terpolymer rubber), natural rubber, and isoprene rubber. Styrene, butadiene rubber, polynorpolene rubber, butadiene rubber, nitrile rubber, black rubber, butyl rubber, halogenated butyl rubber, acrylic rubber, epichlorohydrin rubber and chlorinated polyethylene rubber.
• the fitting-type rubber roller according to the present invention is a rubber port made up of a metal core and a cylindrical rubber layer covering the surface of the metal core, and the hardness of the rubber constituting the rubber layer ( JIS-A) The force is 40 ° ⁇ 90 ° and the thickness of the rubber layer is 0.3mm ⁇ 3mm.
• the core of the rubber layer has a roller core in the through hole, and the surface of the core and the inner peripheral surface of the rubber layer
• the roller core metal and the rubber layer have an inner diameter elongation ratio of 4% to 15% when the core metal is inserted. The torque between them is sufficiently large to prevent the occurrence of belt drive failure and to prevent the rubber layer from twisting due to insufficient torque.
• the roller core can be reused even when the rubber layer is defective or deteriorated, for example.
• FIG. 1 schematically shows a tandem-type color image forming apparatus, in which an intermediate transfer belt is wound around a fitting type rubber roller according to the present invention.
• FIG. 2 is a schematic perspective view of the fitted rubber roller according to the present invention used in FIG.
• FIG. 1 schematically shows a tandem-type color image forming apparatus.
• an intermediate transfer belt (1) composed of an endless belt made of a polyimide-based synthetic rubber is provided with a fitting-type rubber roller (2) according to the present invention and a metal driven roller (3) arranged at a predetermined interval. It is wound.
• Four color developing units (10) are provided in series on the lower transfer part (lb) side of the upper transfer part (la) of the intermediate transfer belt (1).
• Each developing device (10) is provided with a developing roller (11).
• the developing roller (11) is brought into contact with a right side portion of the photosensitive drum (12) and a lower left side of the photosensitive drum (12).
• the tandem-type color image forming apparatus is an intermediate transfer bell that repeats a primary transfer of a toner image carried on an image carrier composed of a photosensitive drum (12) by four primary transfer rollers (14) sequentially. (1).
• a secondary transfer roller (15) is disposed on the left side of the intermediate transfer belt (1) on the left side opposite to the fitted rubber roller (2) around which the left end of the intermediate transfer belt (1) is wound.
• the roller (15) is brought into contact with the outer surface of the left end winding portion of the intermediate transfer belt (1), so that a four-color image is transferred to the printing paper (S) passing between them. ing.
• the fitting rubber mouth (2) according to the present invention is used inside the left end winding portion of the intermediate transfer belt (1), and the roller core (4) and It consists of a cylindrical rubber layer (5).
• the rubber constituting the rubber layer (5) has a hardness (JIS-A) force of 40 ° to 90 °, and the thickness of the rubber layer (5) is 0.3 mm! ⁇ 3 mm.
• the metallic core (4) is inserted into the through hole of the core of the rubber layer (5), and the gap between the surface of the core (4) and the inner peripheral surface of the rubber layer (5).
• the rubber layer (5) can be fitted without the use of an adhesive and the inner diameter elongation of the rubber layer (5) is 4% to 15%.
• the roller mandrel (4) has a cylindrical body (6) and a shaft-inserting shaft provided in the longitudinal direction at the center of the body by three connecting walls (7). It is constituted by a cylindrical portion (8) and a pivot (9) passed therethrough.
• the insert-type rubber roller (2) according to the present invention used inside the intermediate transfer belt (1) shown in FIG. Gold (4) is inserted into the rubber roller (5) when the roller core is inserted, that is, when the rubber layer (5) has an inner diameter elongation rate of 4 to 12% at the time of press-fitting. 2) was created.
• the rubber hardness was evaluated by fixing the rubber hardness (JIS-A) of the rubber layer (5) of each fitting type rubber roller (2) to 40 ° because the softer the rubber, the easier it is to slip.
• the thinner the rubber layer (5) the easier it is to slip. Therefore, the thickness of the rubber layer (5) of each rubber port (2) was fixed at 0.5 mm for evaluation.
• the surface roughness (R z) of the inner peripheral surface of the rubber layer (5) of each rubber roller (2) is set to the same value, and the roller core (R) of each rubber roller (2) is used.
• the surface roughness (R a) of 4) was the same at 1.6.
• the evaluated slip means “slip” due to insufficient torque between the inner peripheral surface of the rubber layer (5) of each rubber roller (2) and the surface of the roller core (4), or the slip. It means that the position of the rubber layer (5) is "shifted" due to the stress in the direction.
• the inner surface of the intermediate transfer belt (1) and the rubber roller (2) Slip between surfaces was excluded from this evaluation.
• the rubber hardness (JIS-A) of the rubber layer (5) of each embedded rubber roller (2), the inner diameter elongation of the rubber layer (5), and the surface roughness of the inner peripheral surface of the rubber layer (5) (Rz) and the surface roughness (Ra) of the roller core (4) were measured and tested based on JIS standards.
• the surface roughness (Rz) of the inner peripheral surface of the rubber layer (5) of each rubber roller (2) is 3 xm, and the surface roughness (Ra) of the roller core (4) of each rubber roller (2) is 1. Except that the point was set to 0, the same procedure as in Examples 1 to 5 was carried out, and the obtained results are shown in Table 1 below.
• Example 1 40 0.5 4 5 1.6 ⁇ Example 2 40 0.5 6 5 1.6 ⁇ Example 3 40 0.5 8 5 1.6 ⁇ Example 4 40 0.5 1 0 5 1.6 ⁇ Example 5 40 0.5 1 2 5 1.6 ⁇ Example 6 40 0.5 4 3 1.6 ⁇ Example ⁇ 40 0.5 6 3 1.6 ⁇ Example 8 40 0.5 8 3 1.6 ⁇ Example 9 40 0.5 1 0 3 1.6 ⁇ Example 10 40 0.5 1 2 3 1.6 ⁇ Example 11 40 0.5 4 5 1.0 ⁇ Example 12 40 0.5 6 5 1.0 ⁇ Example 13 40 0.5 8 5 1.0 ⁇ Example 14 40 0.5 1 0 5 1.0 ⁇ Example 15 40 0.5 1 2 5 1.0 ⁇ Example 16 40 0.5 4 3 1.0 ⁇ Example 17 40 0.5 6 3 1.0 ⁇ Example 18 40 0.5 8 3 1.0 ⁇ Example 19 40 0.5 1 0 3 1.0 ⁇ Example 20 40 0.5 1 2 3 1.0 ⁇ Comparative Example 1
• Example 2 For comparison, the procedure was performed in the same manner as in Example 1 except that the elongation of the inner diameter of the rubber layer (5) when the roller core was fitted was set to 3%. 2
• Example 6 For comparison, the procedure was performed in the same manner as in Example 6 except that the inner diameter elongation of the rubber layer (5) when the roller core was fitted was set to 3%. 2 is shown.
• Example 11 For comparison, the procedure was performed in the same manner as in Example 11 except that the inner diameter elongation of the rubber layer (5) when the roller core was fitted was set to 3%. 2 is shown.
• Example 16 For comparison, the procedure was performed in the same manner as in Example 16 except that the inner diameter elongation of the rubber layer (5) when the roller core was fitted was set to 3%. 2 is shown.
• roller core (4) one In the above embodiment, an aluminum alloy was used as the roller core (4).
• a roller core or a roller core with electroless nickel plating applied to SUM can also be used. Further, the structure of the roller core metal (4) is not limited to that of the above-described embodiment, and may have another structure.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Electrostatic Charge, Transfer And Separation In Electrography (AREA)
• Electrophotography Configuration And Component (AREA)
• Rolls And Other Rotary Bodies (AREA)

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• 2003
  • 2003-08-19 JP JP2003207849A patent/JP4221583B2/ja not_active Expired - Lifetime
  • 2003-09-24 AU AU2003268653A patent/AU2003268653A1/en not_active Abandoned
  • 2003-09-24 CN CNB03822755XA patent/CN100375852C/zh not_active Expired - Lifetime
  • 2003-09-24 WO PCT/JP2003/012120 patent/WO2004029469A1/ja active Application Filing

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