JP2009000772A - Machine for polishing endless belt, and method for manufacturing polished endless belt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a machine for polishing an endless belt, which simplifies the operation for setting a polishing jig on the base of the machine, and improves the positional precision of the polishing jig, and further to provide a method for manufacturing the endless belt using the same machine. <P>SOLUTION: The machine for polishing the endless belt has a power transmitting portion, a dog, and the polishing jig. The polishing jig is composed of a driving roller and a driven roller, which rollers mount the endless belt thereon and are arranged in parallel with each other. The power transmitting portion 4 has a disklike shape, and has a positioning circular cone 11 located on the rotation axis and a pin 5 located on the peripheral edge. The driving roller 1 has a pin 6 arranged on the rotary shaft thereof. The dog is configured by crossing both pins 5, 6. The rotational power is transmitted to the driving roller by the contact of both pins 5, 6. Circular conical recesses 9, 10 are provided on both ends of the rotary shaft of the driving roller. The driving roller is positioned by fitting a positioning circular cone into one of the recessed portions, and is supported by fitting the circular cone of a driving roller supporting member 7 into the other of the recesses. The endless belt wound on the driving roller and the driven roller is polished by means of an abrasive stone while being turned. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an endless belt polishing machine and a method for producing a polished endless belt. More specifically, the present invention simplifies the operation of setting the polishing jig on the polishing machine base in the endless belt polishing machine, improves the positional accuracy of the polishing jig, and shortens the time required for setting the polishing jig. The present invention relates to an endless belt polishing machine that can easily automate the operation of setting a polishing jig, and a method of manufacturing an endless belt having a stable polishing surface using the polishing machine.

Many image forming apparatuses such as copiers and printers using an electrophotographic system employ a mechanism for conveying a toner image, paper, or the like by a transfer and conveyance endless belt, and an endless belt is used. FIG. 5 is a schematic diagram of an example of a four-cycle image forming apparatus. Around the photosensitive drum 13 as an image carrier, a charger 14, a laser exposure device 15, a rotary developing device 16, a transfer and conveyance endless belt 17, and a drum cleaner 18 are arranged in this order. The photosensitive drum is rotationally driven in the direction of the arrow, and is uniformly charged by a charger, then exposed to a laser beam L from an exposure device to form a latent image, and developed and visualized with yellow toner by a developer Y. The The yellow toner image formed on the photosensitive drum is primarily transferred onto the surface of the transfer and conveyance endless belt. The transfer conveyance endless belt is stretched around a driving roller 19, a secondary transfer counter roller 20 and a tension roller 21, and is driven by the driving roller at a speed equal to the surface speed of the photosensitive drum. The surface of the photosensitive drum is cleaned by a drum cleaner, and one cycle is completed.
Next, charging of the photosensitive drum with a charger, exposure with a laser beam, development with cyan toner in the developing unit C, transfer of the toner image to an endless transfer belt, and cleaning of the surface of the photosensitive drum are performed. Thus, a magenta toner image transfer and a black toner image transfer cycle are performed. Yellow, cyan, magenta, and black toner images are superimposed and transferred, and unfixed four color toners are superimposed to form a color toner image formed on the transfer and transport endless belt. The secondary transfer counter roller and the secondary transfer roller At 22, the image is secondarily transferred to the recording medium P. The recording medium onto which the toner image has been secondarily transferred is sent to the fixing device 23 where it is heated and pressurized to fix the toner image and the image formation is completed.
As an image forming apparatus provided with a transfer and conveyance endless belt, there is a tandem color image forming apparatus that carries a sheet so as to pass through a transfer section of a plurality of image forming units, in addition to a four-cycle system. In the tandem system, a plurality of image forming units are arranged side by side, and a transfer conveyance endless belt is stretched between a plurality of rollers so as to contact and rotate at a transfer portion of each image forming unit. is there. By transferring the paper carried on the endless belt to pass through the transfer section of each image forming unit, each toner image formed by each image forming unit is transferred so as to be sequentially superimposed on the same paper. To make a color image.
An endless belt such as a transfer / conveying endless belt is a method of forming rubber or synthetic resin into a cylindrical shape by an internal mandrel system using an annular die, cutting it into a predetermined length and width, forming a flat sheet, and having predetermined dimensions. After being cut into two parts, it is manufactured by a method of joining both ends, a method of injecting a prepolymer into a cylindrical mold and semi-curing it, then demolding, and covering it on an iron core and further curing by heating. Endless belts manufactured by these methods usually have a completely non-smooth surface, and the belt has uneven thickness. If the surface of the belt is not completely smooth, the transferred image is disturbed and a high-quality image cannot be obtained. In addition, if the belt has a thickness unevenness, belt movement speed fluctuations and meandering phenomenon are likely to occur, resulting in misalignment between the toner images of the respective colors, resulting in image disturbance and image quality degradation. For this reason, an endless belt is polished to smooth the surface of the belt and to eliminate thickness unevenness, thereby improving the image quality of an image obtained in the image forming apparatus. However, the kerele used in the conventional cylindrical grinder has a structure having grooves that engage with each other and a structure that sandwiches the power transmission part of the grinder. Therefore, when setting the grinder, the position (angle) Therefore, various improvements have been attempted in these respects.
For example, as shown in FIG. 6, the flange portion 25 of the workpiece 24 can be attached to a workpiece without relying on screwing, and can be used for a workpiece having a shape with no grip allowance. There has been proposed a knitting of a cylindrical polishing machine in which an annular end face 26 is brought into contact with the end face in a coaxial state and fixed by the magnetic force of a magnet 27 disposed on the annular end face (Patent Document 1). Further, as a workpiece fixing jig for a polishing machine that can fix the workpiece to a predetermined position of the polishing machine even if the shape of the workpiece changes, a reference side jig 29 that supports the workpiece 28 to be polished as shown in FIG. The clamp-side jig 30 is rotatably supported by the support shafts 32 and 33 on the center line 31, respectively, and two L-shaped brackets 34, 35, 36, and 37 arranged symmetrically with respect to the center line. Each bracket has movable support points that rotate around the support shafts 32 and 33 in the vicinity of both ends, and the workpiece is guided to a predetermined position of the polishing machine by a total of eight movable support points and fixed. A work fixing jig for a polishing machine has been proposed (Patent Document 2). However, in these techniques, when setting the polishing jig in the polishing machine, time is required for alignment, and when automating the setting operation, a device having an alignment function for the kerf is required.
Furthermore, in the rotational driving force transmission device that rotates the roll by the turning piece that is turned by the operation of the headstock pushing the kerf fixed to the roll shaft, the drooping rotation of the knurl is prevented when the headstock comes to an emergency stop. As a rotational driving force transmission device capable of preventing poor polishing due to thrust movement or biting in of the grindstone, the engagement arm portion of the spring 39 with the roll shaft 38 supported by the main shaft as shown in FIG. A connecting plate 42 having a locking plate portion 41 located at a position facing 40 is attached to a turning piece 43, and a connecting bolt 44 screwed to the locking plate portion 41 is connected to an engagement arm of a tip 39 of the tip 39. A rotational driving force transmission device has been proposed in which when a receiving concave hole 45 formed in the portion 40 is tightened so as to be engaged, the turning piece 43 and the popping 39 are integrally connected via a connecting plate 42 (Patent Literature). 3). Using this method of gripping the polishing jig with pressure can solve the problem of positioning of the scrape, but if the grinding load during polishing is high, to prevent the jig from spinning around It was insufficient.
JP 2002-103217 A Japanese Patent Laid-Open No. 9-117835 JP 2004-338049 A

  The present invention simplifies the operation of setting a polishing jig on a polishing machine base in an endless belt polishing machine, improves the positional accuracy of the polishing jig, shortens the time required for setting the polishing jig, It is an object of the present invention to provide an endless belt polishing machine that can easily automate the operation of setting the belt and a method of manufacturing an endless belt having a stable polishing surface using the polishing machine.

As a result of intensive research to solve the above problems, the present inventor has changed the shape of the cylindrical polishing jig from the block shape having groove processing to the shape consisting of two pins in the endless belt polishing machine. As a result of the change, it has been found that accurate alignment required for setting the jig on the machine base can be greatly simplified, and the present invention has been completed based on this finding.
That is, the present invention
(1) An endless belt polishing machine having a power source, a power transmission unit, a scrape, a polishing jig, and a grindstone, wherein the polishing jig includes a parallel driving roller and a driven roller for stretching the endless belt, and the power transmission unit Has a positioning cone at the center of rotation and a pin at the periphery, the drive roller has a pin on the rotation shaft, the pin of the power transmission part and the pin of the drive roller intersect each other, and both pins constitute a kerf Then, the rotational power is transmitted to the drive roller by the contact of both pins, conical recesses are provided at both ends of the rotation shaft of the drive roller, and the positioning cone of the power transmission unit is fitted into one of the recesses for driving. An endless belt characterized in that a roller is positioned, a conical portion provided on a driving roller support is fitted in the other recess, the driving roller is supported, and the stretched endless belt is ground and polished with a grindstone Polishing machine, Beauty,
(2) It has a power source, a power transmission unit, a scrape, a polishing jig, and a grindstone, and the polishing jig is composed of a parallel drive roller and a driven roller that stretches an endless belt, and the power transmission unit has a disk shape. The center of rotation has a positioning cone and a pin on the periphery, the driving roller has a pin on the rotating shaft, the pin of the power transmission unit and the pin of the driving roller intersect each other, both pins constitute a kerf, and both pins contact As a result, rotational power is transmitted to the drive roller, conical recesses are provided at both ends of the rotation shaft of the drive roller, and the positioning cone of the power transmission unit is fitted into one recess to position the drive roller, while the other The polishing is characterized in that the endless belt polishing machine in which the conical portion provided on the driving roller support is fitted in the recess of the driving roller and the driving roller is supported, and the stretched endless belt is rotated and polished with a grindstone. Endless belt A method of manufacturing,
Is to provide.

  According to the endless belt polishing machine of the present invention, the time required for setting the cylindrical polishing jig can be shortened, and the apparatus required for automation of the jig setting can be simplified. As a result, an endless belt having a uniform and stable polished surface free from a polishing pattern and the like can be easily manufactured without causing the polishing jig to idle.

  An endless belt polishing machine according to the present invention is an endless belt polishing machine having a power source, a power transmission unit, a scrape, a polishing jig, and a grindstone. The power transmission part is disk-shaped and has a positioning cone at the center of rotation and a pin at the periphery, the drive roller has a pin on the rotating shaft, and the pin of the power transmission part and the pin of the drive roller intersect each other, Both pins constitute a kerb, and the rotational power is transmitted to the drive roller by contact of both pins, conical recesses are provided at both ends of the rotation shaft of the drive roller, and the positioning cone of the power transmission unit is provided in one recess. Is fitted, the drive roller is positioned, the other recess is fitted with a cone provided on the drive roller support, the drive roller is supported, and the endless belt is polished with a grindstone while rotating the endless belt Belt Lab It is a machine.

  FIG. 1 is a perspective view of a main part of one embodiment of an endless belt polishing machine of the present invention. The endless belt polishing machine of the present invention includes a power source, a power transmission unit, a scrape, a polishing jig, and a grindstone. In the embodiment shown in FIG. 1, the polishing jig is composed of a driving roller 1 and a driven roller 2 which are parallel to each other, and an endless belt 3 which is a material to be polished is stretched between these two rollers. The power transmission unit 4 has a disk shape, and has a positioning cone (not directly visible in the drawing) at the center of rotation and a drive pin 5 at the periphery. The drive roller has a follower pin 6 on the rotating shaft, and the drive pin and the follower pin cross each other, and both pins constitute a kerf. When both pins come into contact with each other, the drive pin pushes forward the driven pin, the rotational power is transmitted from the power transmission unit to the drive roller, and the drive roller rotates. Conical recesses are provided at both ends of the rotation shaft of the drive roller, the positioning cone of the power transmission unit is fitted into one recess (not directly visible in the figure), the drive roller is positioned, and the drive roller is positioned in the other recess. A cone provided on the support 7 is fitted (not directly visible in the figure), and the drive roller is supported. By rotating the driving roller, the stretched endless belt rotates together with the driven roller, and the surface of the endless belt can be polished by reciprocating the grindstone 8 on the surface of the rotating endless belt.

FIG. 2 is an explanatory view of the endless belt polishing machine of the embodiment shown in FIG. In this embodiment, conical recesses 9 and 10 are provided at both ends of the rotation shaft of the drive roller 1, and the positioning cone 11 of the power transmission unit 4 is fitted into one recess to position the drive roller, and the other A conical 12 provided on the driving roller support 7 is fitted into the recess to support the driving roller. The drive roller support is movable to the left and right as indicated by the arrows in the figure, and the cone 12 can be fitted into the recess 10 by moving the drive roller support to the left, and the drive roller is moved to the right. The cone 12 can be released from the recess 10 by moving.
The power transmission unit 4 has a drive pin 5 on its periphery, the drive roller has a driven pin 6 on the rotating shaft, the drive pin and the driven pin intersect each other, and both pins constitute a kerf. When both pins come into contact with each other, the drive pin pushes forward the driven pin, the rotational power is transmitted from the power transmission unit to the drive roller, and the drive roller rotates in the direction of the arrow in the figure.

  3 and 4 are explanatory views of an embodiment of the operation method of the endless belt polishing machine of the present invention. First, as shown in FIG. 3 (a), the driving roller 1 and the driven roller 2 are located between the driving roller and the driven roller at a position away from between the positioning cone 11 of the power transmission unit and the cone 12 of the driving roller support. After the endless belt 3 is stretched gently, the drive roller is moved between the positioning cone of the power transmission unit and the cone of the drive roller support. Next, as shown in FIG. 3 (b), the drive roller 1 is pressed against the positioning cone 11 of the power transmission unit 4, and the cone and a conical recess at one end of the rotation shaft of the drive roller (not directly visible in the figure). Mate. Further, as shown in FIG. 3C, a drive roller support (not shown) is pressed against the drive roller, and the drive roller support (not shown) is inserted into the conical recess 10 provided in the other recess of the drive roller. The cone 12 is not fitted. By this operation, the position of the driving roller 1 on which the endless belt 3 is stretched is fixed rotatably.

  Next, as shown in FIG. 4D, the gap between the driving roller 1 and the driven roller 2 is widened to apply a predetermined tension to the endless belt 3, and the driving pin 5 of the power transmission unit and the driven pin 6 of the driving roller are connected. After the contact, as shown in FIG. 4 (e), the power transmission unit 4 is rotated by a power source (not shown) and the driven pin is pushed by the driving pin, and the driving roller 1, the endless belt 3 and the driven roller 2 are driven. Rotate. In this state, the grindstone 8 is moved and brought into contact with the surface of the rotating endless belt 3 to reciprocate, thereby polishing the surface of the endless belt to obtain a stable, uniform and smooth polishing surface. Unevenness in thickness can be eliminated.

In the endless belt polishing machine of the present invention, the chipping is made of pins that cross each other installed on the power transmission unit of the polishing machine and the polishing jig, so that the positioning of the chipping when setting the polishing jig on the polishing machine is easy. This makes it easy to automate the work of setting the polishing jig on the polishing machine, and by contacting the two pins before polishing, it is possible to prevent the polishing jig from spinning freely, and a stable polishing surface. Can be obtained.
The endless belt polishing machine of the present invention uses two crossing pins installed on the power transmission section of the polishing machine and the polishing jig, so that the two pins touch each other when setting the polishing jig. Since it can be set so that there is no interference, there is no interference between the power transmission part of the polishing machine and the polishing machine. The shape of the two pins is preferably a cylindrical shape with a rounded tip (the tip of the longitudinal section is elliptical). By setting the pin shape to be rounded at the tip, even when two pins touch each other when setting the polishing jig, the curved surfaces with rounded tips touch each other so that the curved surface Since they are offset from each other and joined, there is no interference between the scrape and the power transmission part of the polishing machine. Also, the length of the two pins is preferably such that the rounded tips touch each other. By setting the length of the two pins to the length where the rounded tips touch each other, the vertices of the pins do not touch each other when setting the polishing jig, and the curved surfaces contact each other. No interference from the power transmission part of the polishing machine.

  In the manufacturing method of the polished endless belt of the present invention, the power source, the power transmission unit, the scrape, the polishing jig, and the grindstone are provided, and the polishing jig includes a parallel driving roller and a driven roller that stretch the endless belt. The power transmission part is disk-shaped, has a positioning cone at the center of rotation and a pin on the periphery, the drive roller has a pin on the rotating shaft, the pin of the power transmission part and the pin of the drive roller intersect each other, The pin constitutes erosion, and the rotational power is transmitted to the drive roller by the contact of both pins. Conical recesses are provided at both ends of the rotation shaft of the drive roller, and the positioning cone of the power transmission unit is provided in one recess. The endless belt is rotated by using an endless belt polishing machine in which the driving roller is positioned by being fitted, and the cone provided on the driving roller support is fitted in the other recess to support the driving roller. While whetstone To polish.

The material of the endless belt used in the method for producing a polished endless belt of the present invention is not particularly limited, and either rubber or synthetic resin can be used. Examples of rubber include styrene-butadiene rubber (SBR), butadiene rubber (BR), acrylonitrile-butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene-diene rubber (EPDM), butyl rubber (IIR), and acrylic rubber. (ANM), chlorosulfonated polyethylene rubber (CSM), silicone rubber, fluorine rubber, polysulfide rubber, natural rubber and the like. These materials can be used individually by 1 type, or can also be used in combination of 2 or more type. Among these, a mixture of chloroprene rubber (CR) and ethylene-propylene-diene rubber (EPDM) can be suitably used because both flame retardancy and ozone resistance can be achieved depending on the blending ratio. The mixing ratio of chloroprene rubber (CR) and ethylene-propylene-diene rubber (EPDM) is preferably 60/40 to 90/10 (weight ratio).
Examples of the synthetic resin include polyimide, polyester, polyarylate, polyamide, polycarbonate, polyphenylene sulfide, polyether ether ketone, polyacetal, and polyurethane. Among these, polyimide is excellent in heat resistance and can be preferably used. Examples of the polyimide include polypyromellitic imide, polybiphenyl tetracarboxylic imide, and polybenzophenone tetracarboxylic imide.

In the method of the present invention, if necessary, the endless belt material can be mixed with a conductive filler to adjust the electric resistance value. Examples of the conductive filler to be blended include carbon black, graphite, carbon fiber, metal powder, metal oxide, and conductive polymer. There is no particular limitation on the molding method of the endless belt material. For example, a rubber or a synthetic resin is molded into a cylindrical shape by an internal mandrel method using an annular die, and is cut into a predetermined length. After cutting to the size of the above, there are a method of joining both ends, a method of injecting a prepolymer into a cylindrical mold and semi-curing it, then demolding, covering it with an iron core, and further heating and curing. it can. Endless belts molded by these methods usually have a surface with a thickness variation of about 25%. According to the method of the present invention, for example, an endless belt having unevenness ranging from 0.7 to 0.9 mm is polished to have a thickness of 0.55 ± 0.03 mm and a stable and even smooth surface. A polished endless belt can be obtained.
In the method of the present invention, before starting the polishing, it is preferable to move the power transmission unit of the polishing machine and the polishing jig in the operation direction during polishing, and to contact the kerbs composed of the drive pin and the driven pin installed on both. Further, it is preferable to hold the polishing jig under pressure so as to prevent the vignetting from being separated due to inertia when the kelging comes into contact. By starting the polishing in a state where the kerbs made of two pins are in contact with each other, the polishing jig does not rotate freely, and a uniform polished surface having no polishing pattern can be obtained.

  According to the endless belt polishing machine of the present invention, the time required for setting the cylindrical polishing jig can be shortened, and the apparatus required for automation of the jig setting can be simplified. As a result, an endless belt having a uniform and stable polished surface free from a polishing pattern and the like can be easily manufactured without causing the polishing jig to idle.

It is a perspective view of the principal part of the one aspect | mode of the endless belt polisher of this invention. It is explanatory drawing of the endless belt polisher of the aspect shown in FIG. It is explanatory drawing of the one aspect | mode of the operating method of the endless belt polisher of this invention. It is explanatory drawing of the one aspect | mode of the operating method of the endless belt polisher of this invention. 1 is a schematic diagram of an example of a four-cycle image forming apparatus. It is explanatory drawing of an example of the crack of a cylindrical grinder. It is explanatory drawing of an example of the workpiece fixing jig for grinders. It is explanatory drawing of an example of a rotational driving force transmission apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive roller 2 Drive roller 3 Endless belt 4 Power transmission part 5 Drive pin 6 Drive pin 7 Drive roller support 8 Grinding stone 9 Conical recessed part 10 Conical recessed part 11 Positioning cone 12 Cone 13 Photosensitive drum 14 Charger 15 Laser exposure Device 16 Rotating Development Device 17 Transfer Conveying Endless Belt 18 Drum Cleaner 19 Drive Roller 20 Secondary Transfer Counter Roller 21 Tension Roller 22 Secondary Transfer Roller 23 Fixing Device 24 Work 25 Flange Portion 26 Annular End Surface 27 Magnet 28 Work 29 Reference Side Jig 30 Clamp side jig 31 Center line 32 Support shaft 33 Support shaft 34 L-shaped bracket 35 L-shaped bracket 36 L-shaped bracket 37 L-shaped bracket 38 Roll shaft 39 Thread 40 Engaging arm portion 41 Locking plate portion 42 Connecting plate 43 Turning piece 44 Connecting bolt 45 Description recessed hole

Claims (2)

  An endless belt polishing machine having a power source, a power transmission unit, an edge, a polishing jig, and a grindstone, and the polishing jig is composed of a parallel drive roller and a driven roller that stretch the endless belt, and the power transmission unit is a disk The rotation cone has a positioning cone and a pin on the periphery, the drive roller has a pin on the rotation shaft, the pin of the power transmission unit and the pin of the drive roller intersect each other, and both pins constitute a kerf, Rotational power is transmitted to the drive roller by contact with the pin, conical recesses are provided at both ends of the rotation shaft of the drive roller, and a positioning cone of the power transmission unit is fitted into one recess to position the drive roller. An endless belt polishing machine characterized in that a cone provided on a driving roller support is fitted in the other recess to support the driving roller, and the stretched endless belt is polished with a grindstone while rotating.   It has a power source, power transmission unit, scrape, polishing jig and grindstone, and the polishing jig consists of a parallel drive roller and driven roller that stretches an endless belt. By having a positioning cone and a pin on the periphery, the driving roller has a pin on the rotating shaft, the pin of the power transmission unit and the pin of the driving roller intersect each other, both pins constitute a kerf, and both pins contact Rotational power is transmitted to the drive roller, conical recesses are provided at both ends of the rotation shaft of the drive roller, the positioning cone of the power transmission unit is fitted into one recess, the drive roller is positioned, and the other recess is Polishing endless using an endless belt polishing machine in which a cone provided on a driving roller support is fitted to support the driving roller, and polishing with a grindstone while rotating the stretched endless belt Belt manufacturing Law.

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