JPH10180600A - Belt side polishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt side polishing device which polishes the edge of a transferring material carrying belt and thereby accomplishes a belt having a high straightness in the side. SOLUTION: A belt side polishing device includes a belt holding structure 51 to hold a belt 109 in such a way as pressing from the inside and a polishing structure 52 to polish the sides of the belt 109. The polishing structure 52 includes a polishing surface holding member 107 having a pipe-form center shaft 108 and a polishing surface 106 consisting of a sand paper attached to the member 107. The belt holding structure 51 holding the belt 109 is supported rotatably through the belt holding member center shaft 101 inserted through the center shaft 108 of the polishing surface holding member. The belt holding structure 51 is rotated by a driving mechanism, not illustrated, coupled with the center shaft 101 of the belt holding member. The polishing surface 106 is brought close to the side of the belt 109 in rotation and brought into contact to polish the side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end of a belt used in an image forming apparatus such as a color copier, a business color copier or a monochrome copier, which forms an image on a transfer material such as paper using a belt. The present invention relates to an apparatus for polishing an edge.

[0002]

2. Description of the Related Art In recent years, color copiers have appeared in response to the color orientation of offices. One of the color copying machines is a quadruple tandem system. In this method, four photosensitive drums as image carriers are arranged in parallel, yellow, magenta, cyan, and black toner images are formed on the respective photosensitive drums, and the toner images are sequentially formed on one transfer material. This is a method in which an image is transferred to obtain a color image.

In this four-tandem color copying machine,
Since the toner images of the respective colors are sequentially transferred onto the transfer material in a superimposed manner, the misalignment of the transfer material greatly affects the image quality. The meandering of the transfer material transport belt causes a color shift in an image finally formed. Therefore, suppressing the meandering of the transfer material conveying belt is important for forming a high quality image.

As a meandering prevention mechanism for the transfer material transport belt, a mechanism in which one edge of the transfer material transport belt is pressed against a regulating plate, or a device in which both edges of the transfer material transport belt are sandwiched between two regulating plates. There is.

[0005]

The restricting plate in the meandering preventing mechanism is made of, for example, a metal plate, and the flatness of the contact portion with the edge of the transfer material conveying belt may be finished to 20 μm. Finishing the metal plate to a flatness of 20 μm can be realized relatively easily, so that it can be realized relatively inexpensively. For this reason, the meandering prevention mechanism using the regulating plate can be said to be quite practical.

However, the edge of the transfer material transport belt is generally straightened by cutting, and the straightness of the edge of the transfer material transport belt by cutting is 100 to 200 μm, and the longer the length, the lower the straightness. The low straightness of the edge of the transfer material transport belt directly causes the transfer material transport belt to meander. In order to realize the running of the transfer material transport belt with less meandering, it is desired to provide a transfer material transport belt having a higher straightness at the edge.

SUMMARY OF THE INVENTION An object of the present invention is to provide a transfer material conveying belt having a high straightness of an edge, and in order to realize this, there is provided a belt edge polishing apparatus for polishing an edge of an endless belt. It is to be.

[0008]

According to a first aspect of the present invention, there is provided a belt edge polishing apparatus for pressing a belt from the inside to hold the belt, and a polishing apparatus for polishing the edge of the belt. At least one of the belt holding structure and the polishing structure is rotated so that the polishing surface is in contact with at least a portion of the edge of the belt; Then, the polishing surface slides, and the edge of the belt is polished.

A belt edge polishing apparatus according to a second principal aspect of the present invention comprises a belt holding structure for pressing and holding a belt from the inside and at least one polishing surface having a polishing surface for polishing the edge of the belt. Having a polishing structure, at least one of the belt holding structure and the polishing structure is rotated,
The polishing surface is brought into contact with a part of the edge of the belt, the edge of the belt slides on the polishing surface, and the edge of the belt is polished.

A belt edge polishing apparatus based on a third principal aspect of the present invention comprises a belt holding structure for pressing and holding the belt from the inside and at least one polishing surface having a polishing surface for polishing the edge of the belt. A polishing structure, wherein both the belt holding structure and the polishing structure are rotated, the polishing surface contacts at least a portion of the belt edge, and the belt edge and the polishing surface are in opposite directions. And the edge of the belt is polished.

A belt edge polishing apparatus according to a fourth principal aspect of the present invention comprises a belt holding structure for pressing and holding the belt from the inside and a polishing surface for polishing one edge of the belt. A polishing structure having a polishing structure, and another polishing structure having a polishing surface for polishing the opposite edge of the belt,
At least one of the two polishing structures and the belt holding structure is rotated, and the polishing surface of each polishing structure is brought into contact with at least a part of each edge of the belt, and each edge of the belt and each polishing surface slide. Then, both edges of the belt are polished.

A belt edge polishing apparatus based on a fifth principal aspect of the present invention has at least a driving roller and a driven roller for applying tension from inside to support the belt, and a polishing surface for polishing the edge of the belt. The driving roller is rotated to drive the belt, and the polishing surface of the polishing structure is brought into contact with a part of the edge of the belt. Slides, and the edge of the belt is polished.

A belt edge polishing apparatus based on a sixth principal aspect of the present invention has at least a driving roller and a driven roller for applying tension from inside to support the belt, and a polishing surface for polishing the edge of the belt. Having one polishing structure, the belt is run by rotating the drive roller, the polishing structure is rotated, the polishing surface of the polishing structure is in contact with a part of the edge of the belt, The edge of the belt and the polishing surface slide in opposite directions, and the edge of the belt is polished.

A belt edge polishing apparatus according to a seventh principal aspect of the present invention is a cylindrical belt holding member, which is tightly wound with an adhesive material provided on an inner peripheral surface thereof being inserted inside the belt holding member. A belt holding member having a cylindrical shape for holding the belt by being in close contact with the belt, and at least one polishing structure having a polishing surface for polishing an edge of the belt, the belt holding member and the polishing structure Is rotated, the polishing surface is brought into contact with the edge of the belt, the edge of the belt slides on the polishing surface, and the edge of the belt is polished.

A belt edge polishing apparatus according to an eighth aspect of the present invention is a cylindrical belt holding member, which is tightly wound with an adhesive material provided on an inner peripheral surface thereof being inserted inside the belt holding member. A belt holding member having a cylindrical shape for holding the belt by being in close contact with the belt, and at least one polishing structure having a polishing surface for polishing an edge of the belt, the belt holding member and the polishing structure Are rotated in opposite directions to each other, the polishing surface is brought into contact with the edge of the belt,
The edge of the belt and the polishing surface slide in opposite directions, and the edge of the belt is polished.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

Before describing the belt edge polishing apparatus of the present invention, an image forming apparatus to which a belt is applied will be described.

A four-tandem color copier is shown in FIG.
As schematically shown in FIG. 2, four sets of recording units (solid-state scanning head unit and 1: 1 imaging optical system) and four sets of image forming units (an electrophotographic system capable of forming images on a transfer material) are combined. (A photoreceptor drum, a charging device, a developing device, a transfer device, a cleaning device, and a static eliminator).

The transfer material is conveyed to the four image forming units by a transfer material conveying belt, and the developer images are transferred to the transfer material in each image forming unit. A color image is formed by fixing.

First, the solid scanning head 1Y moves the yellow photosensitive drum 2 in accordance with the yellow image data sent.
The exposure light is output for Y. This solid scanning head 1Y
Has a structure in which minute light emitting portions are arranged at equal intervals on the main scanning direction line, and according to an on / off signal sent from the printing control unit, according to the pattern to be printed. The individual light emitting units are turned on, and the light of the light emitting units is
Exposure is performed by forming light on the photoreceptor drum by a 1 × coupling optical system that forms an image on the photosensitive drum. Specifically, the solid-state scanning head 1Y has an LED head array with a resolution of 400 DPI,
A selfoc lens array was used for the 1 × imaging optical system.

Around the yellow photosensitive drum 2Y, a charging device 3Y for charging the surface of the photosensitive drum, a yellow developing device 4Y, a yellow transfer device 5Y, a yellow cleaning device 6Y, and a yellow discharging device 7Y are provided.

The yellow photosensitive drum 2Y is rotated at a periphery speed of V ₀ by a driving motor (not shown). The surface of the yellow photosensitive drum 2Y is charged by a charging device 3Y including a conductive charging roller provided in contact with the surface of the photosensitive drum. The charging roller is rotated by contacting the drum surface.

The photosensitive drum is made of a surface wave organic photoconductor. This photoconductor usually has a high resistance, but has a property that when irradiated with light, the specific resistance of the light irradiated portion changes. Therefore, by irradiating the surface of the charged yellow photosensitive drum 2Y with light corresponding to the yellow print pattern from the solid scanning head 1Y through an equal-magnification image forming optical system, the latent image of the yellow print pattern is changed to the yellow photosensitive drum 2Y. Formed on the surface.

The electrostatic latent image is an image formed on the surface of the photosensitive drum by charging, and is an image formed by the solid-state scanning head 1Y.
, The specific resistance of the surface to be illuminated by the photoconductor is reduced, and the charged electric charge on the surface of the photoconductor drum flows, while the electric charge in the portion of the solid scanning head 1Y that has not been irradiated with light remains. (A negative latent image).

In the yellow developing device 4Y, a yellow toner formed of a resin containing a yellow dye is prepared. The yellow toner is frictionally charged by being stirred inside the yellow developing device 4Y, and the yellow photosensitive drum 2
It has charges of the same polarity as the charged charges on Y. As the surface of the yellow photosensitive drum 2Y passes through the yellow developing device 4Y, the yellow toner is electrostatically attached only to the latent image portion from which the charge has been removed, and the latent image is developed with the yellow toner ( Reversal development).

The yellow photosensitive drum 2Y on which the yellow toner image has been formed continues to rotate at the outer peripheral speed V ₀ , and is transferred onto the transfer material 8 on the conveyor belt 12 supplied at a transfer position at a timing by a paper feed system. Yellow transfer device 5
Transcribed by Y.

The paper feeding system includes a pickup roller 9, a feed roller 10, and a registration roller 11.
The transfer material 8 lifted from the paper feed cassette 39 by the pickup roller 9 is fed by the feed roller 10 to the transfer roller 8.
Only the sheet is conveyed to the registration roller 11. After correcting the posture of the transfer material 8, the registration roller 11 sends the transfer material 8 onto the transfer material transport belt 12. The peripheral speed of the registration roller 11 and the peripheral speed of the transfer material conveying belt 12 are equal to the photosensitive drum peripheral speed V _0.
It is set so as to have the same speed. The transfer material 8 in a state where a part held by the resist roller 11, is fed to a transfer position of the yellow photosensitive drum 2Y together with the transfer material conveyance belt 12 at V ₀ which yellow photosensitive drum 2Y and constant speed.

The yellow toner image in contact with the transfer material 8 is separated from the yellow photosensitive drum 2Y by the yellow transfer device 5Y and transferred onto the transfer material 8, and a yellow toner image having a print pattern based on a yellow print signal is transferred. 8 is formed.

The yellow toner image in contact with the transfer material 8 is transferred to the yellow photosensitive drum 2Y by the yellow transfer device 5Y.
, And is transferred onto the transfer material 8, and a yellow toner image of a print pattern based on the yellow print signal is formed on the transfer material 8.

The yellow transfer device 5Y includes a transfer roller having semi-conductivity. The transfer roller supplies an electric field having a polarity opposite to the potential of the yellow toner electrostatically attached to the yellow photosensitive drum 2Y from the back side of the transfer material conveying belt. This electric field acts on the yellow toner through the transfer material conveying belt and the transfer material 8 to transfer the toner from the photosensitive drum 5Y to the transfer material 8.

The transfer material 8 onto which the yellow toner has been transferred is supplied to the magenta recording section / image forming section, further to the cyan recording section / image forming section, and further to the black recording section / image forming section.

Each recording unit and the image forming unit are composed of the same components and operations as described in detail above, except that yellow is replaced with magenta, cyan, and black. The description of the copy / image forming unit is omitted.

Now, a yellow transfer section, a magenta transfer section,
The transfer material 8 on which the color superimposed image has been formed after passing through the cyan transfer portion and the black transfer portion is sent to the fixing device 13.

The fixing device 13 is composed of a heat roller incorporating a heater. The fixing device 13 heats only the toner image placed on the transfer material 8 by electric charge, thereby
The well-overlaid toner is melted and permanently fixed to the transfer material 8. The transfer material 8 on which the fixing is completed is carried out to the paper discharge tray 15 by the delivery roller 14.

On the other hand, the photosensitive drums (2Y / 2M / 2C / 2BK) of the respective colors, which have passed the transfer position, are driven to rotate at the outer peripheral speed V ₀ as they are, and the cleaning device (6Y /
6M / 6C / 6BK) to remove residual toner and paper dust, and a photosensitive drum (2Y / 2M / 2C / 2B) with a static elimination lamp of a static eliminator (7Y / 7M / 7C / 7BK).
K) The potential of the surface is leveled out, and a series of processes from the charging device (3Y / 3M / 3C / 3BK) is started again as necessary.

The transfer material transport belt 12 that has transferred the transfer material 8 has an endless structure, and is held by a driving roller 16 on the fixing device 13 side and a driven roller 17 on the transfer material supply port side. The driving roller 16 receives the driving force from a driving motor (not shown), and as described above,
The photosensitive drum is driven so that the peripheral speed V ₀ and the belt peripheral speed are equal. On the other hand, the driven roller 17
The shafts on both sides of the roller have a mechanism that can move in a direction parallel to the transfer material transport direction, and are pressed by a compression spring 18 in a direction opposite to the transfer material transport direction to apply a tensile load to the transfer material transport belt 12. I have. The mechanism that enables the driven roller 17 to move in a direction parallel to the transfer material transport direction includes an elongated hole (not shown) provided in a frame, and a driven roller that slides on the hole and rotates the driven roller 17. It is composed of a holding member 21. This transfer material transport belt 13
After the transfer material 8 is sent to the fixing device 13, the residual toner and paper dust attached to the belt surface are cleaned by the belt cleaning device 22, and the next transfer material 8 is conveyed as necessary.

In the case of single-color printing, as described above,
An image is formed by an arbitrary single-color recording unit / image forming unit. At this time, the recording unit / image forming unit other than the selected color does not operate.

In this four-tandem color copying machine,
Since the toner images of the respective colors are sequentially transferred onto the transfer material in a superimposed manner, the misalignment of the transfer material greatly affects the image quality. The meandering of the transfer material transport belt causes the transfer material electrostatically attracted thereon to meander, and thus causes the transfer material to be displaced at the transfer position, resulting in color misregistration in the finally formed image. Cause it to occur. Therefore, suppressing the meandering of the transfer material conveying belt is important for forming a high quality image.

As one of the meandering prevention mechanisms of the transfer material conveying belt applicable to the color copying machine shown in FIG. 27, there is a mechanism using one regulating plate and a tapered driven roller. FIG. 28 schematically shows the meandering prevention mechanism.

A regulating plate 31 is provided on one side of the driving roller 16, and is located on the small diameter side of the tapered driven roller 17, and is fixed separately from the driving roller 16. For this reason, the transfer material transport belt 12 slides down the inclined surface of the tapered driven roller 17 during running and leans toward the regulating plate 31, but the bias is caused by the edge of the transfer material transport belt 12 hitting the regulating plate 31. Can be suppressed. As a result, the transfer material transport belt 12 runs while the edge slides on the regulating plate 31. Thereby, meandering of the transfer material transport belt 12 is prevented.

Another meandering prevention mechanism for a transfer material conveying belt applicable to the color copying machine shown in FIG. 27 is one using two regulating plates. FIG. 29 schematically shows the meandering prevention mechanism.

Two regulating plates 3 are provided on both sides of the driving roller 16.
1a and 31b are provided. The regulating plate 31a is fixed separately from the driving roller 16, and the regulating plate 31b is movably supported along the shaft 16a of the driving roller 16, and is pressed against the edge of the transfer material conveying belt 12 by the compression spring 32. I have. The regulating plate 31b is the transfer material conveying belt 1.
In order to push the edge of No. 2, the edge on the opposite side of the transfer material transport belt 12 hits the regulating plate 31a. As a result, the transfer material transport belt 12 runs while the edges on both sides slide on the regulating plates 31a and 31b, respectively. Thereby, meandering of the transfer material transport belt 12 is prevented.

[First Embodiment] A belt edge polishing apparatus according to a first embodiment will be described with reference to FIGS.

As shown in FIG. 1, the belt edge polishing apparatus has a belt holding structure 51 for holding an endless belt 109, and a polishing structure 52 for polishing the edge of the belt 109. I have.

As shown in FIGS. 3A and 3B, the belt holding structure 51 has two belt holding members 10.
4 and a holding member central axis 101. The belt holding member 104 has a semi-cylindrical shape, and the two belt holding members 104 are combined to form a cylinder having a peripheral surface in contact with the belt 109. The length of the outer circumference of the cylinder is slightly shorter than the length of the inner circumference of the belt 109 to be held. The holding member center shaft 101 engages with the two belt holding members 104,
Both ends protrude from both ends of a circular column formed by two semi-cylindrical belt holding members 104.

Two parallel pins 102 passing therethrough are fixed to the holding member center shaft 101, and a pin insertion hole 104a into which the pin 102 is inserted is formed in the belt holding member 104. . The pin 102 is, for example, φ6 m
m, and the pin insertion hole 104a has a diameter of, for example, φ6.1.
mm. The belt holding member 104 includes
Counterbores 105 for receiving the compression springs 103 are provided at four places on the surface facing the other belt holding member.
The depth of the spot facing 105 and the length of the compression spring 103 are:
Belt holding member 104 arranged inside belt 109
Is determined in consideration of the length of the circumferential surface of the belt holding member 104 and the length of the inner circumferential surface of the belt 109 so that the circumferential surface of the belt 109 presses the inner circumferential surface of the belt 109.

In the belt holding structure 51, a pin 102 of the holding member center shaft 101 is inserted into a pin insertion hole 104a of the belt holding member 104, and a compression spring 103 is provided between facing spots 105 of the belt holding member 104 facing each other. With the belt holding members 104 arranged close to each other, they are inserted into the inside of the belt 109 as shown in FIG. The two belt holding members 104 are urged away from each other by a compression spring 103, and the peripheral surface of the belt holding member 104 presses the inner surface of the belt 109 outward. Thus, the belt 109 is fixed to the belt holding structure 51.

In FIG. 1, the polishing structure 52 has a polishing surface 106, a polishing surface holding member 107 for holding the same, and a polishing surface holding member central axis 108 provided on the polishing surface. The polishing surface 106 is, for example, sandpaper, which is fixed to the polishing surface holding member 107 by, for example, a double-sided tape. The polishing surface holding member center shaft 108 is formed of a hollow pipe, and has an inner diameter larger than that of the belt holding member center shaft 101. As a result, the belt holding member center shaft 101 is inserted inside the polishing surface holding member center shaft 108, and the polishing surface 106 and the edge of the belt 109 can come into contact with each other.

The belt holding structure 51 holding the belt 109 is rotatably supported via a belt holding member center shaft 101 passed inside the polishing surface holding member center shaft 108.

The belt holding structure 51 is rotated by a driving mechanism (not shown) connected to one end of the central shaft 101 of the belt holding member. The polishing surface holding structure 52 includes:
Belt 10 rotating with belt holding structure 51
9 at a constant speed n, and its polished surface 10
6 contacts the edge of the belt 109. As a result, the edge of the belt 109 and the polishing surface 106 slide, and the belt 10
Nine edges are polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since the variation width of the polished surface was 1 mm, the experiment was performed under the unified condition of 1 mm. Of the total feed amount, 0.8 mm was used for rough cutting, and the remaining 0.2 mm was used for finish cutting. In addition, the peripheral speed of the belt is used instead of the number of rotations so that the scale of the speed parameter does not differ depending on the size of the belt to be rotated.

The control factors of the experiment are as follows.

Roughing No. 80, No. 120, No. 240 Finishing No polishing, No. 1200, No. 1500 Polishing surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Belt peripheral speed 30 mm / s, 60 mm / s, 90 mm / S The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, the contact position between the belt and the polishing surface
The belt straightness of the polished surface after the m-width polishing was measured, and this value was used as an output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 4 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0057] Calculating the difference between the gains in this experiment, 9 [d
b]. Therefore, X = 10 ^0.9 -8 In this specification, “to” means almost equal.

Therefore, when the optimum condition is set, the reliability is improved about eight times as much as the worst condition. In terms of the amount of variation, the amount of variation in the obtained result is １ ／.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 8 [db]. Therefore, X = 10 ^0.8 -6.3 Therefore, it was confirmed by the confirmation experiment that the reliability was improved about 6 times as much as the worst value. In terms of the amount of variation, the amount of variation in the obtained result is 1/6.

Although the optimum conditions were obtained from the experimental results, FIG. 4 shows that the difference in the SN ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finishing cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

As a result, a belt having a straightness of 25 μm or less can be obtained.

In this belt edge polishing apparatus, the polishing surface 106 does not need to contact the entire edge of the belt 109, but may be configured to contact a part of the edge as shown in FIG. As a practical matter, for a belt having a diameter of 1 m, providing a polished surface in contact with the entire circumference requires a considerable amount of labor and a large amount of cost. As shown in FIG. 2, even with a device in which the polishing surface 106 having a small area is brought into contact with a part of the edge of the belt 109, a belt having similar straightness can be obtained under similar optimum conditions.

[Second Embodiment] A belt edge polishing apparatus according to a second embodiment will be described with reference to FIGS. In the drawings, members already described in the description of the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted in the following description.

As shown in FIG. 5, the belt edge polishing apparatus has a belt holding structure 51 for holding an endless belt 109 and two polishing structures 52 for polishing the edge of the belt 109. doing. The belt holding structure 51 holding the belt 109 is rotatably supported via a belt holding member center shaft 101 that is passed through a polishing surface holding member center shaft 108 made of a pipe.

The belt holding structure 51 is rotated by a driving mechanism (not shown) connected to one end of the central shaft 101 of the belt holding member. The two polishing structures 52 are both brought close to the belt 109 rotating together with the belt holding structure 51 at a constant speed n, and the polishing surface 106 made of the respective sandpaper has a corresponding polishing surface 106 on the corresponding side. The edge of the belt 109 is contacted. As a result, the edge of the belt 109 and the polishing surface 106 slide, and the belt 10
The edges on both sides of 9 are polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of both polished surfaces to 1 mm. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. In addition, the peripheral speed of the belt is used instead of the number of rotations so that the scale of the speed parameter does not differ depending on the size of the belt to be rotated.

The control factors of the experiment are as follows.

Roughing Grain size 80, 120, 240 No finishing, No grain size 1200, 1500 Polishing surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Belt peripheral speed 30 mm / s, 60 mm / s, 90 mm / S The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, with the contact position between the belt and the polished surface as the initial position, the belt straightness of the polished surface after polishing both sides by 1 mm was measured, and the total value was used as the output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 7 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0072] Calculating the difference between the gains in this experiment, 11 [d
b]. Therefore, X = 10 ^{1.1 to} 12.6 Therefore, when the optimum condition is set, the reliability is improved about 12 times that of the worst condition. In terms of the variation amount, the variation amount of the obtained result is 1/12.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 10 [db]. Therefore, X = 10 ¹ = 10 Therefore, it was confirmed that the reliability was improved about 10 times as much as the worst value in the confirmation experiment. In terms of the amount of variation, the amount of variation in the obtained result is 1/10.

From the experimental results, the optimum conditions were obtained. However, referring to FIG. 7, the difference in the S / N ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finish cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

As a result, a belt having a straightness of 25 μm or less can be obtained.

In this belt edge polishing apparatus, the polishing surface 106 does not need to contact the entire edge of the belt 109, but may be configured to contact a part of the edge as shown in FIG. As a practical matter, for a belt having a diameter of 1 m, providing a polished surface in contact with the entire circumference requires a considerable amount of labor and a large amount of cost. As shown in FIG. 6, a belt having a similar straightness can be obtained under similar optimal conditions even with a device in which the polishing surface 106 having a small area contacts a part of the edge of the belt 109.

[Third Embodiment] A belt edge polishing apparatus according to a third embodiment will be described with reference to FIGS. In the drawings, members already described in the description of the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted in the following description.

As shown in FIG. 8, the belt edge polishing apparatus has a belt holding structure 51 for holding an endless belt 109 and a polishing structure 52 for polishing the edge of the belt 109. I have. The belt holding structure 51 holding the belt 109 is a belt holding member center shaft 1 that is passed inside a polishing surface holding member center shaft 108 made of a pipe.
01 is supported. The polishing structure 52 is rotatably supported via a polishing surface holding member central axis 108.

The polishing structure 52 is rotated by a driving mechanism (not shown) connected to the center shaft 108 of the polishing surface holding member. The polishing structure 52 is brought close to the belt 109 fixed to the belt holding structure 51 at a constant speed n while being rotated, and the polishing surface 1 made of sandpaper is rotated.
06 contacts the edge of the belt 109. This allows
The edge of the belt 109 and the polishing surface 106 slide, and the belt 1
The edge of 09 is polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of the rotary polishing surface to 1 mm each. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. The peripheral surface speed of the contact polishing portion was used for the rotating polishing surface holding member so that the scale of the speed parameter did not differ depending on the size.

The control factors of the experiment are as follows.

Roughing Grain size 80, 120, 240 No finishing, no grain size 1200, 1500 No. of polished surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Polishing partial peripheral speed 30 mm / s, 60 mm / s, 90 mm / s The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity Belt hardness 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness 70 μm, 100 μm Was. In the experiment, the contact position between the belt and the polishing surface
The belt straightness of the polished surface after the m-width polishing was measured and used as an output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 10 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum conditions and the worst conditions were obtained as follows.

[0086] Calculating the difference between the gains in this experiment, 7 [d
b]. Therefore, X = 10 ^0.7 -5 Therefore, under the optimum condition, the reliability is improved about five times as much as the worst condition. In terms of the amount of variation, the amount of variation in the obtained result is 1/5.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 8 [db]. Therefore, X = 10 ^0.8 -6.3 Therefore, it was confirmed by the confirmation experiment that the reliability was improved about 6 times as much as the worst value. In terms of the amount of variation, the amount of variation in the obtained result is 1/6.

From the experimental results, the optimum conditions were obtained. However, looking at FIG. 10, the difference in the S / N ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and finish cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

As a result, a belt having a straightness of 25 μm or less can be obtained.

In this belt edge polishing apparatus, the polishing surface 106 does not need to contact the entire edge of the belt 109, and may be configured to contact a part of the edge as shown in FIG. As a practical matter, for a belt having a diameter of 1 m, providing a polished surface in contact with the entire circumference requires a considerable amount of labor and a large amount of cost. As shown in FIG. 9, a belt having a similar straightness can be obtained under similar optimum conditions even with an apparatus in which the polishing surface 106 having a small area contacts a part of the edge of the belt 109.

[Fourth Embodiment] A belt edge polishing apparatus according to a fourth embodiment will be described with reference to FIGS. In the drawings, members already described in the description of the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted in the following description.

As shown in FIG. 11, the belt edge polishing apparatus has a belt holding structure 51 for holding an endless belt 109, and two polishing structures 52 for polishing the edge of the belt 109. doing. The belt holding structure 51 holding the belt 109 is supported via a belt holding member center shaft 101 which is passed inside a polishing surface holding member center shaft 108 made of a pipe. Each polishing structure 5
2 is rotatably supported via a polishing surface holding member center shaft 108.

The polishing structure 52 is rotated by a driving mechanism (not shown) connected to the center shaft 108 of the polishing surface holding member. The two polishing structures 52 are both rotated and approached at a constant speed n to the belt 109 fixed to the belt holding structure 51, and the polishing surface 106 made of the respective sandpaper is placed on the corresponding side. The edge of the belt 109 is contacted. Thereby, the belt 10
9 and the polishing surface 106 slide, and the edges on both sides of the belt 109 are polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of the rotary polishing surface to 1 mm each. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. The peripheral surface speed of the contact polishing portion was used for the rotating polishing surface holding member so that the scale of the speed parameter did not differ depending on the size.

The control factors of the experiment are as follows.

Roughing No. 80, No. 120, No. 240 Finishing No grain size No. 1200, No. 1500 Polishing surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Polishing partial peripheral speed 30 mm / s, 60 mm / s, 90 mm / s The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, with the contact position between the belt and the polished surface as the initial position, the belt straightness of the polished surface after polishing both sides by 1 mm was measured, and the total value was used as the output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 13 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0100] Calculating the difference between the gains in this experiment, 9 [d
b]. Therefore, X = 10 ^0.9 -8 Therefore, under the optimum condition, the reliability is improved about eight times as much as the worst condition. In terms of the amount of variation, the amount of variation in the obtained result is １ ／.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 10 [db]. Therefore, X = 10 ¹ = 10 Therefore, it was confirmed that the reliability was improved about 10 times as much as the worst value in the confirmation experiment. In terms of the amount of variation, the amount of variation in the obtained result is 1/10.

Although the optimum conditions were obtained from the experimental results, FIG. 13 shows that the difference in the SN ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finishing cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

As a result, a belt having a straightness of 25 μm or less can be obtained.

In this belt edge polishing apparatus, the polishing surface 106 does not need to contact the entire edge of the belt 109, but may be configured to contact a part of the edge as shown in FIG. As a practical matter, for a belt having a diameter of 1 m, providing a polished surface in contact with the entire circumference requires a considerable amount of labor and a large amount of cost. As shown in FIG. 12, the polishing surface 106 having a small area is
A belt having a similar straightness can be obtained under similar optimum conditions by using a device that makes contact with a part of the edge.

[Fifth Embodiment] A belt edge polishing apparatus according to a fifth embodiment will be described with reference to FIGS. In the drawings, members already described in the description of the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted in the following description.

As shown in FIG. 14, the belt edge polishing apparatus has a belt holding structure 51 for holding an endless belt 109, and a polishing structure 52 for polishing the edge of the belt 109. I have. The belt holding structure 51 holding the belt 109 is rotatably supported via a belt holding member center shaft 101 that is passed through a polishing surface holding member center shaft 108 made of a pipe. The polishing structure 52 is rotatably supported via a polishing surface holding member central axis 108.

The belt holding structure 51 is rotated by a driving mechanism (not shown) connected to one end of the central shaft 101 of the belt holding member. The polishing structure 52 is rotated in a direction opposite to the rotation direction of the belt holding structure 51 by a driving mechanism (not shown) connected to the polishing surface holding member central axis 108. While being rotated, the polishing structure 52 approaches the belt 109 fixed to the belt holding structure 51 at a constant speed n, and the polishing surface 106 made of sandpaper comes into contact with the edge of the belt 109.
As a result, the edge of the belt 109 and the polishing surface 106 slide in opposite directions, and both edges of the belt 109 are polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of the rotary polishing surface to 1 mm each. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. The relative speed of the contact polishing portion was used so that the scale of the speed parameter did not differ depending on the size of the rotating polishing surface holding member and the belt.

The control factors of the experiment are as follows.

Roughing No. 80, No. 120, No. 240 Finishing No grinding, No. 1200, No. 1500 No. of polished surface 10 μm / s, 20 μm / s, 30 μm / s Relative speed of polishing part 30 mm / s, 60 mm / s, 90 mm / s The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, the contact position between the belt and the polishing surface
The belt straightness of the polished surface after the m-width polishing was measured and used as an output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 16 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0114] Calculating the difference between the gains in this experiment, 12 [d
b]. Therefore, X = 10 ^{1.2 to} 16 Therefore, when the optimum condition is set, the reliability is improved about 16 times that of the worst condition. In terms of the variation amount, the variation amount of the obtained result is 1/16.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 10 [db]. Therefore, X = 10 ¹ = 10 Therefore, it was confirmed that the reliability was improved about 10 times as much as the worst value in the confirmation experiment. In terms of the amount of variation, the amount of variation in the obtained result is 1/10.

Although the optimum conditions were obtained from the experimental results, it can be seen from FIG. 16 that the difference in the S / N ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finishing cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

Thus, a belt having a straightness of 25 μm or less can be obtained.

In this belt edge polishing apparatus, the polishing surface 106 does not need to contact the entire edge of the belt 109, and may be configured to contact a part of the edge as shown in FIG. As a practical matter, for a belt having a diameter of 1 m, providing a polished surface in contact with the entire circumference requires a considerable amount of labor and a large amount of cost. As shown in FIG. 15, the polishing surface 106 having a small area is
A belt having a similar straightness can be obtained under similar optimum conditions by using a device that makes contact with a part of the edge.

[Sixth Embodiment] A belt edge polishing apparatus according to a sixth embodiment will be described with reference to FIGS. In the drawings, members already described in the description of the above embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted in the following description.

As shown in FIG. 17, the belt edge polishing apparatus has a belt holding structure 51 for holding an endless belt 109 and two polishing structures 52 for polishing the edge of the belt 109. doing. The belt holding structure 51 holding the belt 109 is rotatably supported via a belt holding member center shaft 101 that is passed through a polishing surface holding member center shaft 108 made of a pipe. Each polishing structure 52 is rotatably supported via a polishing surface holding member central axis 108.

The belt holding structure 51 is rotated by a driving mechanism (not shown) connected to one end of the central shaft 101 of the belt holding member. The polishing structure 52 is rotated in a direction opposite to the rotation direction of the belt holding structure 51 by a driving mechanism (not shown) connected to the polishing surface holding member central axis 108. The two polishing structures 52 are both rotated and approached at a constant speed n to the belt 109 fixed to the belt holding structure 51, and the polishing surface 106 made of the respective sandpaper is placed on the corresponding side. The edge of the belt 109 is contacted. This allows
The edge of the belt 109 and the polishing surface 106 slide in opposite directions, and both edges of the belt 109 are polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of the rotary polishing surface to 1 mm each. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. The peripheral surface speed of the contact polishing portion was used for the rotating polishing surface holding member so that the scale of the speed parameter did not differ depending on the size.

The control factors of the experiment are as follows.

Roughing No. 80, No. 120, No. 240 Finishing No grinding, No. 1200, No. 1500 Graining surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Polishing partial peripheral speed 30 mm / s, 60 mm / s, 90 mm / s The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, with the contact position between the belt and the polished surface as the initial position, the belt straightness of the polished surface after polishing both sides by 1 mm was measured, and the total value was used as the output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 19 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0128] Calculating the difference between the gains in this experiment, 12 [d
b]. Therefore, X = 10 ^{1.2 to} 16 Therefore, when the optimum condition is set, the reliability is improved about 16 times that of the worst condition. In terms of the variation amount, the variation amount of the obtained result is 1/16.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 11 [db]. Therefore, X = 10 ^{1.1 to} 13. Therefore, it was confirmed by a confirmation experiment that the reliability was improved about 13 times as much as the worst value. In terms of the amount of variation, the amount of variation in the obtained result is 1/13.

The optimum conditions were obtained from the experimental results. However, in FIG. 19, the difference in the S / N ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finishing cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

Thus, a belt having a straightness of 25 μm or less can be obtained.

In this belt edge polishing apparatus, the polishing surface 106 does not need to contact the entire edge of the belt 109, but may be configured to contact a part of the edge as shown in FIG. As a practical matter, for a belt having a diameter of 1 m, providing a polished surface in contact with the entire circumference requires a considerable amount of labor and a large amount of cost. As shown in FIG. 18, the polishing surface 106 having a small area is
A belt having a similar straightness can be obtained under similar optimum conditions by using a device that makes contact with a part of the edge.

[Seventh Embodiment] A belt edge polishing apparatus according to a seventh embodiment will be described with reference to FIGS.

As shown in FIG. 20, the belt edge polishing apparatus has a driving roller 110, a driven roller 111, and two polishing structures 52. The belt 109 having an endless structure is supported by being driven by a driving roller 110 and a driven roller 111. Each polishing structure 52 includes a polishing surface 106, a polishing surface holding member 107 for holding the polishing surface 106,
It has a polishing surface holding member central axis 108 provided on it. The polishing surface 106 is, for example, sandpaper,
This is achieved by, for example, using a double-sided tape to hold the polishing surface holding member 107.
Fixed to The polishing surface holding member center shaft 108 is formed of a hollow pipe, and has an inner diameter larger than that of the driving roller center shaft 112.

The driving roller 110 is rotatably supported via a driving roller central shaft 112 which is inserted inside the polishing surface holding member central shaft 108 made of a pipe. The driven roller 111 is rotatably supported via a driven roller center shaft 113 and has a compression spring (not shown).
Urged in a direction away from the driving roller 110. As a result, tension is applied to the belt 109, so that the belt 109 runs by the rotation of the driving roller 110.

The drive roller 110 has a drive roller center shaft 1.
The belt 109 is rotated by a driving mechanism (not shown) connected to the end of the belt 12.
The two polishing structures 52 are both approached at a constant speed n to the belt 109 running by the driving roller 110, and the polishing surface 106 made of the respective sandpaper has the end of the belt 109 on the corresponding side. Touched to the edge. Thereby, the edge of the belt 109 and the polishing surface 10
6 slides, and both edges of the belt 109 are polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of the rotary polishing surface to 1 mm each. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. The rotating belt is
The peripheral speed of the belt was used so that the scale of the speed parameter did not change depending on the size of the driving roller that was driven to rotate.

The experimental control factors are as follows.

Roughing Grain size 80, 120, 240 No finishing, No grain size 1200, 1500 Polishing surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Belt peripheral speed 30 mm / s, 60 mm / s, 90 mm / S The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, the contact position between the belt and the polishing surface
The belt straightness of the polished surface after the m-width polishing was measured and used as an output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 22 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0143] Calculating the difference between the gains in this experiment, 14 [d
b]. Thus, X = 10 ^1.4 to 25 Thus, when the optimum conditions, the improvement of approximately 25 times more reliable the worst conditions can be obtained. In terms of the amount of variation, the amount of variation in the obtained result is 1/25.

Next, a confirmation experiment was performed under the above estimated two conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 11 [db]. Therefore, X = 10 ^{1.1 to} 13. Therefore, it was confirmed by a confirmation experiment that the reliability was improved about 13 times as much as the worst value. In terms of the amount of variation, the amount of variation in the obtained result is 1/13.

Although the optimum conditions were obtained from the results of this experiment, FIG. 22 shows that the difference in the SN ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finishing cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

Thus, a belt having a straightness of 25 μm or less can be obtained.

Various modifications can be made to the belt edge polishing apparatus. For example, as shown in FIG. 21A, the polishing structure 52 is rotatably supported, and the polishing structure 52 rotates so that the edge of the belt 109 and the polishing surface 106 slide in opposite directions. May be done. Further, as shown in FIG.
May be arranged non-coaxially with respect to the drive roller 110. Also in these devices, a belt having similar straightness can be obtained under similar optimum conditions.

[Eighth Embodiment] A belt edge polishing apparatus according to an eighth embodiment will be described with reference to FIGS.

As shown in FIG. 23, the belt edge polishing apparatus comprises a belt outer periphery holding member 114 and a polishing structure 52.
And The polishing structure 52 includes a polishing surface 106,
It has a polishing surface holding member 107 for holding it, and a polishing surface holding member central axis 108 provided on the polishing surface holding member 107. The polishing structure 52 is rotatably supported via a polishing surface holding member central axis 108. The belt outer periphery holding member 114 has a cylindrical shape, and a replaceable adhesive is provided on the inner peripheral surface thereof. For this reason, the inner diameter of the belt outer periphery holding member 114 is slightly longer than the outer diameter of the tightly wound belt 109, and the tightly wound belt 109 is inserted into the inside of the belt outer periphery holding member 114. It has a large inside diameter.
Belt 109 inserted into belt outer periphery holding member 114
Is loosened by its own elasticity and comes into close contact with the adhesive provided inside the belt outer periphery holding member 114, and as a result, is fixed to the belt outer periphery holding member 114.

The polishing structure 52 is rotated by a driving mechanism (not shown) connected to the center shaft 108 of the polishing surface holding member. The polishing structure 52 is brought close to the belt 109 held by the belt outer periphery holding member 114 at a constant speed n while being rotated, and the polishing surface 106 made of sandpaper is brought into contact with the edge of the belt 109. Thereby, the edge of the belt 109 and the polishing surface 106 slide, and the edge on both sides of the belt 109 is polished.

The optimum conditions for the belt edge polishing apparatus were determined by experiments. The experimental method followed the Taguchi method.
The original straightness of the belt used in the experiment was 0.1 to 0.6.
Since there is a variation width of 1 mm, the experiment was carried out by unifying the total feed amount of the rotary polishing surface to 1 mm each. Of this total feed amount, 0.8 mm is rough-cut and the remaining 0.2 m
m was taken as the amount of finish shaving. The rotating belt is
The peripheral speed at the position of the outermost periphery of the polishing sliding surface was used so that the scale of the speed parameter did not differ depending on the size of the driving roller to be rotated.

The control factors of the experiment are as follows.

Roughing No. 80, No. 120, No. 240 Finishing No grinding, No. 1200, No. 1500 Polishing surface feed rate 10 μm / s, 20 μm / s, 30 μm / s Polishing surface peripheral speed 30 mm / s, 60 mm / s, 90 mm / s The error factors are as follows.

Environment High-temperature, high-humidity, low-temperature, low-humidity belt hardness: 1.6 × 10 ⁴ kg / cm ² , 6.4 × 10 ⁴ kg / cm ² Belt thickness: 70 μm, 100 μm Was. In the experiment, the contact position between the belt and the polishing surface
The belt straightness of the polished surface after the m-width polishing was measured and used as an output value. In addition, the experiment was carried out as an experiment with zero desired characteristics.

FIG. 26 is a graph showing the result of optimizing the belt polishing conditions. In the figure, the horizontal axis indicates the control factor, and the vertical axis indicates the SN ratio.

From the experimental results, the optimum condition and the worst condition were obtained as follows.

[0157] Calculating the difference between the gains in this experiment, 5 [d
b]. Therefore, X = 10 ^0.5 -3 Therefore, when the optimum condition is set, the reliability is improved about three times as much as the worst condition. In terms of the amount of variation, the amount of variation in the obtained result is １ ／.

Next, a confirmation experiment was performed under the above-mentioned two estimated conditions. When the difference between the respective gains as a result of this confirmation experiment was calculated, it was 2 [db]. Therefore, X = 10 ^{0.2 to} 1.6 Therefore, it was confirmed that the reliability was improved by about 1.6 times the worst value in the confirmation experiment. In terms of the variation amount, the variation amount of the obtained result is 1/1.
It becomes 6.

The optimum conditions were obtained from the experimental results. However, in FIG. 26, the difference in the S / N ratio among the three levels of the polished surface feed amount and the belt peripheral speed was different for the rough cutting and the finishing cutting. It turns out that it is smaller than the difference of SN. Therefore, what should be suppressed as useful conditions is that the roughing is a grain size of 80 and the finishing is a grain size of 1500. However, the required straightness varies depending on the device, and it is not always good to use a grain size of 1500 for finishing. Therefore, it can be said that under this condition, the most generally suitable is to perform rough cutting with a fineness of grain size of 80 or more.

Thus, a belt having a straightness of 25 μm or less can be obtained.

Various modifications can be made to the belt edge polishing apparatus. For example, as shown in FIG. 24A, the polishing structure 52 is not rotated, and the belt outer periphery holding member 114 is rotatably supported, and this may be rotated. Alternatively, as shown in FIG. 24B, the polishing structure 52 and the belt outer periphery holding member 114 are both rotatably supported, and the edge of the belt 109 and the polishing surface 106 slide in opposite directions. Alternatively, both the polishing structure 52 and the belt outer periphery holding member 114 may be rotated. Also in these devices, a belt having similar straightness can be obtained under similar optimum conditions.

Further, as shown in FIG.
The polishing structures 52 may be arranged one by one on both sides of the belt 109 and rotated. FIG. 25
As shown in (B), the two polishing structures 52 are not rotated together, and the belt outer periphery holding member 114 is rotatably supported, and this may be rotated. Alternatively, as shown in FIG. 25C, the two polishing structures 52 and the belt outer periphery holding member 114 are both rotatably supported, and the edge of the belt 109 and the polishing surface 106 slide in opposite directions. As such, both the polishing structure 52 and the belt outer periphery holding member 114 may be rotated. Also in these devices, a belt having similar straightness can be obtained under similar optimum conditions.

The present invention is not limited to the above-described embodiment, but includes all implementations without departing from the gist of the invention. That is, the present invention includes all devices obtained by appropriately modifying the above-described embodiment.

[0164]

According to the present invention, there is provided a belt edge polishing apparatus for polishing an edge of an endless belt.
As a result, a transfer material conveying belt having a high straightness at the edge can be obtained, and a color copying machine capable of forming a high-quality image without color shift is realized.

[Brief description of the drawings]

FIG. 1 is a diagram showing a belt edge polishing apparatus according to a first embodiment.

FIG. 2 is a diagram showing a modification of the belt edge polishing apparatus of FIG. 1;

FIG. 3 is a view showing a structure of a belt holding structure shown in FIG. 1;

FIG. 4 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus of FIG. 1;

FIG. 5 is a diagram showing a belt edge polishing apparatus according to a second embodiment.

FIG. 6 is a view showing a modification of the belt edge polishing apparatus shown in FIG. 5;

FIG. 7 is a graph showing a result of optimizing a belt polishing condition in the belt edge polishing apparatus shown in FIG. 5;

FIG. 8 is a diagram showing a belt edge polishing apparatus according to a third embodiment.

FIG. 9 is a view showing a modification of the belt edge polishing apparatus shown in FIG. 8;

FIG. 10 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus of FIG. 8;

FIG. 11 is a diagram showing a belt edge polishing apparatus according to a fourth embodiment.

FIG. 12 is a view showing a modification of the belt edge polishing apparatus of FIG. 11;

FIG. 13 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus of FIG. 11;

FIG. 14 is a view showing a belt edge polishing apparatus according to a fifth embodiment.

FIG. 15 is a view showing a modification of the belt edge polishing apparatus of FIG. 14;

FIG. 16 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus shown in FIG. 14;

FIG. 17 is a diagram showing a belt edge polishing apparatus according to a sixth embodiment.

18 is a view showing a modification of the belt edge polishing apparatus of FIG.

FIG. 19 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus shown in FIG. 17;

FIG. 20 is a diagram showing a belt edge polishing apparatus according to a seventh embodiment.

FIG. 21 is a view showing a modification of the belt edge polishing apparatus of FIG. 20;

FIG. 22 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus shown in FIG. 20;

FIG. 23 is a diagram showing a belt edge polishing apparatus according to an eighth embodiment.

FIG. 24 is a view showing a modification of the belt edge polishing apparatus of FIG. 23;

FIG. 25 is a view showing another modified example of the belt edge polishing apparatus of FIG. 23;

FIG. 26 is a graph showing a result of optimizing belt polishing conditions in the belt edge polishing apparatus of FIG. 23;

FIG. 27 is a diagram schematically showing a configuration of a quadruple tandem type color copying machine.

28 is a diagram schematically showing a meandering prevention mechanism of a transfer material conveying belt applicable to the color copying machine of FIG. 27;

FIG. 29 is a diagram schematically showing a meandering preventing mechanism of another transfer material conveying belt applicable to the color copying machine of FIG. 27;

[Explanation of symbols]

 51 Belt holding structure 52 Polishing structure 106 Polishing surface 109 Belt

Claims (8)

[Claims] 1. A belt edge polishing device for polishing an edge of a belt having an endless structure, comprising: a belt holding structure for pressing and holding the belt from the inside; and a polishing surface for polishing the edge of the belt. At least one of the belt holding structure and the polishing structure is rotated, the polishing surface is brought into contact with at least a part of the belt edge, and the belt edge is polished. A belt edge polishing device in which the surface slides and the edge of the belt is polished. 2. A belt edge polishing device for polishing an edge of a belt having an endless structure, comprising: a belt holding structure for pressing and holding the belt from the inside; and a polishing surface for polishing the edge of the belt. At least one of the belt holding structure and the polishing structure is rotated, the polishing surface is brought into contact with a part of the edge of the belt, and the edge of the belt and the polishing surface are rotated. A belt edge polishing device in which the belt slides and the edge of the belt is polished. 3. A belt edge polishing apparatus for polishing an edge of a belt having an endless structure, comprising: a belt holding structure for pressing and holding the belt from the inside; and a polishing surface for polishing the edge of the belt. Having at least one abrasive structure having both the belt holding structure and the abrasive structure rotated, the abrasive surface contacting at least a portion of the belt edge, the belt edge and the abrasive surface Are slid in opposite directions to each other, and the edge of the belt is polished. 4. A belt edge polishing device for polishing an edge of a belt having an endless structure, comprising: a belt holding structure for pressing a belt from the inside to hold the belt; and a polishing edge on one side of the belt. A polishing structure having a polishing surface for polishing, and another polishing structure having a polishing surface for polishing an edge on the opposite side of the belt, wherein at least one of the two polishing structures and the belt holding structure is provided. Is rotated, the polishing surface of each polishing structure is brought into contact with at least a part of each edge of the belt, each edge of the belt and each polishing surface are slid, and both edges of the belt are polished. Edge polishing device. 5. A belt edge polishing device for polishing an edge of a belt having an endless structure, wherein a driving roller and a driven roller for applying tension from inside to support the belt, and polishing the edge of the belt. And at least one polishing structure having a surface, the belt is run by rotating the drive roller,
The polishing surface of the polishing structure is in contact with a part of the edge of the belt,
A belt edge polishing apparatus in which the edge of the belt and the polishing surface slide, and the edge of the belt is polished. 6. A belt edge polishing device for polishing an edge of a belt having an endless structure, a driving roller and a driven roller for applying tension from inside to support the belt, and a polishing device for polishing the edge of the belt. And at least one polishing structure having a surface, the belt is run by rotating the drive roller,
The polishing structure is rotated, the polishing surface of the polishing structure is brought into contact with a part of the edge of the belt, the belt edge and the polishing surface slide in opposite directions, and the belt edge is polished. Edge polishing device. 7. A belt edge polishing device for polishing an edge of a belt having an endless structure, wherein the adhesive member provided on an inner peripheral surface of the cylindrical belt holding member is inserted inside the belt holding member. A belt holding member having a cylindrical shape for holding the belt by being in close contact with the tightly wound belt, and at least one polishing structure having a polishing surface for polishing an edge of the belt; And an at least one of the polishing structures is rotated, the polishing surface is brought into contact with the edge of the belt, the edge of the belt slides on the polishing surface, and the edge of the belt is polished. 8. A belt edge polishing device for polishing an edge of a belt having an endless structure, wherein the adhesive member provided on an inner peripheral surface of the cylindrical belt holding member is inserted into the inside thereof. A belt holding member having a cylindrical shape for holding the belt by being in close contact with the tightly wound belt, and at least one polishing structure having a polishing surface for polishing an edge of the belt; And the polishing structure are both rotated in opposite directions, the polishing surface is brought into contact with the edge of the belt, the edge of the belt and the polishing surface slide in opposite directions, and the edge of the belt is polished. Edge polishing device.