JP3792075B2 - Manufacturing method of paper feed roller - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention printers, facsimiles, a method for manufacturing a sheet feed rows La used in office equipment and measurement equipment, such as X-Y plotter.
[0002]
[Prior art]
In recent years, printers and the like having high resolution models are appearing one after another, and accordingly, it is necessary to accurately feed paper to be printed with almost no deviation. Therefore, in order to increase the frictional force so that the outer peripheral surface of the paper supply roller and the paper do not slip during paper supply, for example, the following processing is performed on the outer peripheral surface of the roller body. 1. A mixture of a certain amount of coating liquid and ceramic powder is applied to the outer peripheral surface of the roller body and baked for finishing. 2. A certain amount of rubber is applied to the outer peripheral surface of the roller body and baked for finishing. 3. A certain amount of synthetic resin is applied to the outer peripheral surface of the roller body and finished. 4). A certain amount of urethane is applied to the outer peripheral surface of the roller body and finished. 5. Screen printing is performed on the outer peripheral surface of the roller body, and the portion is exposed and developed, followed by etching. 6). A thin disk-shaped disk body is attached to the outer peripheral surface of the shaft rod so as to contact the paper surface and feed the paper surface.
[0003]
[Problems to be solved by the invention]
However, said 1. To 4. In any of the above surface treatments, it is necessary to apply a mixture of coating liquid and ceramic powder, rubber, or synthetic resin to the outer peripheral surface of the roller body. It takes time and effort, and after coating, it requires advanced techniques such as surface finishing to improve accuracy, making it cumbersome and cumbersome, and it is the main cause that hinders productivity improvement. It was. Further, the equipment for the coating is large and the equipment cost is high, and when the coated material is applied to the outer peripheral surface of the roller body, the excessively spilled coated material cannot be recovered and discarded as it is. However, there is a problem that the product cost cannot be reduced due to the extremely large loss.
[0004]
In addition, since any of the roller main bodies applies a coating on the outer peripheral surface thereof, the weight of the entire sheet feeding roller is increased accordingly. On the other hand, a plurality of paper feed rollers are usually incorporated in office equipment such as printers, and these paper feed rollers are rotated by a drive motor, so a large motor with a large output torque is required. There is also a problem that office equipment such as a momentum printer is increased in size and is difficult to handle and the product cost is increased. Furthermore, 5. Although this process does not increase in weight, it requires many processing steps such as screen printing, exposure, development and etching, so that the production is troublesome and takes time and effort as described above, and the production efficiency is poor. 6). The processing is performed by punching a metal plate from a thin disc body and attaching a plurality of the disc bodies to the shaft rod. In this case as well, punching, processing and mounting of the disc body, etc. There is a problem that the laborious work is forced and the production efficiency is poor.
The present invention has been made to solve the above problems, fabricate high simple processing capacity, thereby improving the production efficiency, moreover equipment cost cheap paper feed rows La of manufacturing cost can make the inexpensive An object of the present invention is to provide a manufacturing method.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, a method for manufacturing a paper feed roller according to the present invention includes an upper / lower support plate that is rotated in the same direction in a horizontal plane by a main motor, and is provided to face the upper / lower support plate. And a plurality of holding cylinders rotated in a horizontal plane by an auxiliary motor, and a roller made of a metal material having a predetermined hardness by fitting upper and lower ends into each pair of holding cylinders opposed to the upper and lower support plates A main body is supported vertically, the auxiliary motor is driven, the roller main body is rotated intermittently by a predetermined angle around its central axis, and the roller main body positioned opposite to the spray nozzle of the shot blasting machine in the meantime Shot blasting with ceramic powder is performed on the outer peripheral surface, and shot blasting is performed on the entire outer peripheral surface of the roller body, and then the main motor is driven to move the upper and lower support plates at a predetermined angle. Countless projections protrudes slightly to increase the frictional force on the outer circumferential surface of each roller body by repeating the same operation by rotating the molded friction areas interspersed.
[0006]
As this, since countless projections protrudes slightly to increase the frictional force by shot blasting by ceramic powder on the outer peripheral surface of the roller body is adapted to mold the friction regions interspersed, manufacture of the paper feed roller is very Production efficiency is improved because it becomes simple and no surface finish is required. In addition, since the coating material is unnecessary, the equipment cost is also low, which leads to low production cost. In addition, the paper feed roller does not increase in weight, so that the drive motor can be miniaturized, and office equipment such as a printer can be miniaturized.
[0007]
Furthermore, since the ceramic powder used for shot blasting can be recovered and reused, there is little loss and it can sufficiently cope with environmental problems.
As the paper feed roller, one not heat-treated with iron, aluminum, stainless steel or the like is used, and as the ceramic powder, one having a particle size of about 900 to 600 is used, for example.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the manufacturing method of the sheet feeding rows La of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a paper feed roller according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part thereof, and FIG. 3 is a schematic view of the manufacturing apparatus. The paper feed roller A has a hollow pipe shape in which both ends of the roller body 1 are open, and a friction region E is formed on the outer peripheral surface 1a to increase the frictional force while leaving both ends of the required dimensions. Innumerable protrusions 2 slightly protruding from the outer peripheral surface 1a are scattered in the friction region E as shown in FIG. 2 by shot blasting with ceramic powder S described later.
[0009]
Next, the apparatus for manufacturing the paper feed roller A according to the present invention will be described with reference to FIGS. The paper feed roller A is made of aluminum and is not heat-treated. Alternatively, a metal that is relatively soft and not heat-treated, such as iron or stainless steel, may be used. In other words, these may be any metal material having a predetermined hardness that is soft enough to form slight protrusions on its peripheral surface by shot blasting with ceramic powder S described later.
[0010]
As shown in FIG. 3, the manufacturing apparatus for the feed roller A includes a support device 4 disposed in a processing chamber 3 that hermetically surrounds the periphery, and supports a plurality of roller bodies 1a so as to be rotatable in a horizontal plane. It is schematically constituted by a shot blasting machine 5 for shot blasting the peripheral surface of the roller body 1a with ceramic powder S. And the shot blasting countless projections 2 which projects slightly collide injecting ceramic powder on the peripheral surface of the roller main body 1a as a workpiece at high speed, i.e. refers to processing to stand so-called burrs, shot A blasting machine is an apparatus for performing the shot blasting .
[0011]
The support device 4 is formed by fixing disk-like upper and lower support plates 7 and 8 that support upper and lower ends of each roller body 1a to a vertical axis 6 that is vertically disposed in the center of the processing chamber 3, respectively. The upper and lower support plates 7 and 8 are configured to freely rotate in the same direction in the horizontal plane as the vertical axis 6 rotates. A plurality of holding cylinders 9a, 9b that hold the upper end portion or the lower end portion of the roller body 1a are opposed to each other on the opposing surfaces of the upper and lower support plates 7, 8 along the outer peripheral edge. (9 in the figure) are provided. Each holding tube 9a, 9b is provided so as to freely rotate in a horizontal plane, and each holding tube 9b on the lower support plate 8 side can be slightly lowered in order to make it easy to fit the roller body 1. It has become. Each holding cylinder portion 9a on the upper support plate 7 side is inserted into a through hole 10 penetrating the upper support plate 7, and is disposed and fixed on the upper surface of the upper support plate 7 in correspondence with each holding cylinder portion 9a. The auxiliary motor 11 is fixed to the lower end of the drive shaft 12. Each auxiliary motor 11 rotates its drive shaft 12 intermittently by a predetermined angle.
[0012]
The upper end of the vertical axis 6 is supported by the bearing 13 above the upper support plate 7, and the lower end is connected to the main motor 14 below the lower support plate 8. The main motor 14 also rotates intermittently by a predetermined angle (angle formed between the roller main bodies 1a) and temporarily stops at that position.
[0013]
On the other hand, the shot blasting machine 5 includes a cylinder 15 for storing the ceramic powder S. The cylinder 15 is disposed sideways, and the spray nozzle 16 at the tip thereof faces the inside through an opening 17 formed on one side of the peripheral side wall 3a of the processing chamber 3, and the tip is supported on both the upper and lower sides. The roller bodies 1a are supported between the plates 7 and 8 and are opposed to each other in the vicinity of the center of each roller body 1a temporarily stopped. Further, the base end portion of the cylinder 15 is pivotally supported 19 on a support base 18, and is rotated up and down in a vertical plane around the support shaft 19 so that the spray nozzle 16 extends along the longitudinal direction of the outer peripheral surface of each roller body 1a. It can be moved up and down. A hydraulic cylinder 20 is disposed on the upper surface of the base 21 and rotates the cylinder 15. The tip of the rod 20a is pivotally supported by a mounting plate 22 attached to the lower side surface of the cylinder 15, and the lower end of the hydraulic cylinder. It is pivotally supported 25 on a pedestal 24 arranged on the upper surface of the pedestal 21. Connected to the cylinder 15 is an air supply pipe 27 for sending compressed air from a compressor 26.
[0014]
The ceramic powder S stored in the cylinder 15 is made of ceramic having low thermal conductivity formed of zirconia or alumina, and has a particle size of 900 to 600. The particle size, the injection amount, the injection speed, and the injection of the ceramic powder S are used. The time is determined by the material of the roller body 1.
[0015]
A funnel-shaped hopper 28 for collecting the falling ceramic powder S is provided below the processing chamber 3. The collected ceramic powder S is passed through a sieve 29, and only a transfer pipe having a predetermined size is transferred. Then, the gas is again supplied into the cylinder 15 through 30.
[0016]
Next, a method for forming the friction region E on the peripheral surface of the roller body 1 will be described. First, the upper and lower ends are fitted into the pair of holding cylinders 9a and 9b facing the upper and lower support plates 7 and 8, respectively, and the roller body 1 is supported vertically. Then, the hydraulic cylinder 20 is actuated to reciprocate the cylinder 15 up and down in 3 to 6 seconds, and the ceramic powder S is sprayed up and down on one side of the outer peripheral surface of the roller body 1 positioned opposite the tip of the spray nozzle 16. Apply shot blasting . At this time, a part of the ceramic powder S sprayed from the spray nozzle 16 collides with the outer peripheral surface 1a of the roller body 1 as shown in FIG. At the same time, one side of the depression 31 is raised outward by the wrinkling, and the pointed protrusion 2 is formed. Further, since the temperature of the outer peripheral surface at this time reaches about 1000 ° C., it is desirable that N2 gas be ejected instead of the air for cooling. The ceramic powder S that collides with the outer peripheral surface 1a and the ceramic powder S that does not collide also fall down along the side wall 3a of the processing chamber 3 and are gathered together by the hopper 28. The powder S is supplied again into the cylinder 15 through the transfer pipe 30 and is reused.
[0017]
When shot blasting on one side of the roller body 1 is completed, the auxiliary motor 11 is driven to rotate the drive shaft 12 by a predetermined angle, and the cylinder 15 is moved up and down again to perform shot blasting on the new outer peripheral surface 1a. . When shot blasting is performed on the entire outer peripheral surface 1a of the roller body 1 in this way, the main motor 14 is driven to rotate the upper and lower support plates 7 and 8 by a predetermined angle, and the next new roller body 1 is moved. The cylinder 15 is positioned opposite to the tip of the injection nozzle 16. Then, the same operation as described above is repeated. In this way, shot blasting is performed on the outer peripheral surface 1a of each roller body 1, and when all the processes are completed, the roller body 1 in which the friction region E is formed is removed from between the upper and lower support plates 7 and 8, A new roller body 1 is attached.
[0018]
The sheet feeding roller A that has been subjected to the shot blasting process is preferably subjected to, for example, alumite treatment or nickel plating treatment in order to cure the outer peripheral surface thereof.
Of course, the feed roller used in the present invention includes a feed roller and a press roller.
[0019]
【The invention's effect】
Since the production method of the sheet feeding rows La of the present invention is the above described configuration has the following effects.
(1) Since the friction area for increasing the frictional force is formed only by performing shot blasting with ceramic powder on the outer peripheral surface of the roller body, it is necessary to apply the coating material and to finish the surface as before. Therefore, the molding can be performed easily and easily without taking much time.
(2) Since the coated material is not applied, the paper feed roller can be reduced in weight, and the drive motor can be downsized, and the office equipment such as a printer can be downsized.
(3) Since the outer peripheral surface of the roller body that rotates intermittently by a predetermined angle is subjected to shot blasting with ceramic powder, a friction region for increasing the frictional force can be formed on the outer peripheral surface, so that it can be easily manufactured and processed. The production efficiency is greatly improved.
(4) Since there is no need to apply a conventional coating material, the equipment used for it becomes unnecessary, and the equipment cost can be greatly reduced.
(5) The manufacturing cost can be reduced because the manufacturing is simple and the equipment cost can be greatly reduced.
(6) Since the ceramic powder used for shot blasting can be reused after processing, it has a beneficial effect that it has little loss and can sufficiently cope with environmental problems.
[Brief description of the drawings]
FIG. 1 is a perspective view of a paper feed roller according to the present invention.
FIG. 2 is an enlarged sectional view of the same part.
FIG. 3 is a schematic diagram of a manufacturing apparatus that manufactures the paper feed roller.
4 is a cross-sectional view taken along line XX in FIG.
FIG. 5 is an operation explanatory view for forming protrusions on the outer peripheral surface of the roller body.
[Explanation of symbols]
1 Roller body 1a Outer peripheral surface 2 Projection
5 Shot blasting machine
7 Upper support plate
8 Lower support plate
9a Holding tube
9b Holding tube
11 Auxiliary motor
14 Main motor
16 Injection nozzle 28 Hopper A Feed roller E Friction area S Ceramic powder

Claims (2)

An upper / lower support plate that rotates in the same direction in a horizontal plane by a main motor, and a plurality of holding cylinders that are provided to face the upper / lower support plate and rotate in a horizontal plane by an auxiliary motor; The upper and lower support plates are opposed to each pair of holding cylinders, and both upper and lower ends are fitted vertically to support a roller body made of a metal material having a predetermined hardness, and the auxiliary motor is driven to drive the roller body. The roller body is rotated intermittently by a predetermined angle around the center axis, and the outer peripheral surface of the roller body located opposite to the spray nozzle of the shot blasting machine is subjected to shot blasting with ceramic powder during that time. After the shot blasting is performed on the outer periphery of each roller body, the main motor is driven to rotate the upper and lower support plates by a predetermined angle and repeat the same operation. Method for producing a paper feed roller which countless projections, characterized in that the molded friction areas interspersed that protrudes slightly to increase the frictional force. The method for manufacturing a paper feed roller according to claim 1, wherein the ceramic powder sprayed onto the roller body is collected through a hopper, and the ceramic powder selected by screening is reused .

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