JP2000084895A - Sheet cutting tool and sheet winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut a thin rubber sheet and a cloth sheet easily, positively and efficiently by using an ultrasonic knife as a cutting means. SOLUTION: A sheet cutting tool 1 is provided with an ultrasonic knife 3 together with an anvil 2. The anvil 2 supports a rubber or cloth sheet S, and the ultrasonic knife 3 is moved while pressing the sheet S with the tip part of the ultrasonic knife 3 to cut the sheet S along the moving direction of the knife 3. In addition, a guide groove 2a is formed at the anvil 2, and the knife 3 is moved along one edge part of the upper end of the guide groove 2a while making the tip part of the knife 3 abut on one edge part of the upper end to smoothly cut the sheet S such as a thin crude rubber sheet or a yarn contained thin rubber sheet. A burning problem of the rubber sheet, a problem of requiring temperature rise waiting time, and the like can therefore be avoided to positively cut even the thin rubber sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool for cutting a rubber or cloth sheet such as a thin raw rubber sheet, a thread-containing thin rubber sheet or a thin cloth, and a sheet winding apparatus provided with the cutting tool. It is effectively used for producing a cylindrical rubber molded product such as an electrophotographic device such as a printer or an intermediate transfer belt of an electrostatic recording device.

[0002]

2. Description of the Related Art Conventionally, in an electrophotographic apparatus and an electrostatic recording apparatus such as a copying machine and a printer, a toner is formed on an electrostatic latent image formed on the surface of an image forming body such as a photosensitive member. Is electrostatically attached to form a toner image, which is transferred to a recording medium such as paper to obtain a print image.

In recent years, various types of copiers and printers corresponding to color images have been proposed. In order to obtain a color image, toners of four colors of magenta, yellow, cyan, and black are superposed at a predetermined ratio. To obtain a color tone. In this case, an intermediate transfer belt for temporarily transferring and holding the toner image on the photoreceptor is provided as a method of obtaining a predetermined color tone by superimposing these four color toners, and a magenta toner image, a yellow toner image, and a cyan toner A color image is formed on the intermediate transfer belt by sequentially transferring four color toner images of an image and a black toner image onto the intermediate transfer belt, and the color image is transferred onto a recording medium such as paper. An intermediate transfer system has been proposed.

The intermediate transfer belt used for image formation of the intermediate transfer system is made of a soft and elastic material because it is in direct contact with a photoreceptor, a toner image, a recording medium, etc. An elastic body formed into a belt shape is used. In this case, if necessary, the belt is reinforced with a woven fabric or a yarn wound in a spiral shape. Such a cylindrical rubber molded product such as an intermediate transfer belt is manufactured by winding an unvulcanized rubber sheet around a cylindrical mandrel, heating and vulcanizing the unvulcanized rubber sheet to form a cylindrical shape. The step of winding the unvulcanized rubber sheet around the mandrel is performed by feeding out the unvulcanized rubber sheet from a sheet roll, cutting the unvulcanized rubber sheet to a predetermined size, and winding the cut unvulcanized rubber sheet around the outer periphery of the mandrel. I have.

[0005] In a series of steps of winding the unvulcanized rubber sheet around the mandrel, as a means for cutting the unvulcanized rubber sheet, an electric heating knife and an anvil are used. The rubber sheet is cut into a predetermined size by the electric heating knife.

However, when this electric heating knife is used,
If a trouble (M / C trouble) occurs in the control mechanism or the like during cutting, the movement of the electric heating knife is stopped, and the rubber is burnt, resulting in poor quality. Also, in case of M / C trouble,
Because of the high heat, the knife cannot be touched and trouble can not be taken immediately.

Further, the electric knife requires a waiting time for raising the temperature of the knife to a predetermined temperature at the time of starting the operation, which causes a problem that the start of the operation is delayed.

Further, as a means for cutting a cloth sheet such as a woven cloth used for reinforcing the intermediate belt or the like, a disk knife or an anvil having a section formed on an outer peripheral edge is used. The cloth sheet is cut by rotating and moving the disk knife from one end to the other while pressing the disk knife on the anvil. However, if the disk knife does not cut, the cloth will be left uncut, and if the knife does not cut like this, the knife will be pressed more strongly on the anvil, causing a concave scratch on the anvil. Is difficult to cut.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a sheet cutting tool capable of cutting a thin rubber sheet and a cloth sheet simply, reliably and efficiently, and a sheet winding device provided with the same. The purpose is to provide.

[0010]

In order to achieve the above object, the present invention provides the following sheet cutting tool and sheet winding device. Claim 1: an anvil on which a rubber or fabric sheet is supported;
A sheet cutting tool having cutting means for cutting a rubber or cloth sheet supported by the anvil, wherein an ultrasonic knife is used as the cutting means. Claim 2: An ultrasonic knife, a support member having a holding portion for holding the ultrasonic knife, an anvil swingably attached to the support member, and the holding portion and the anvil are always brought close to each other. 2. The sheet cutting tool according to claim 1, further comprising: urging means for pressing the tip of the ultrasonic knife held by the holding portion against the anvil. The sheet cutting device according to claim 2, wherein the anvil is formed in a circular shape, and is rotatably attached to the support member such that an ultrasonic knife abuts on an outer peripheral portion of the anvil. Claim 4: A sheet roll for feeding a rubber or cloth sheet, a mandrel on which the rubber or cloth sheet fed from the sheet roll is attached to an outer peripheral surface, and a sheet cutting disposed between the sheet roll and the mandrel. And winding the rubber or cloth sheet around the mandrel while feeding the rubber or cloth sheet from the sheet roll, and cutting the rubber or cloth sheet by the cutting tool when the mandrel rotates a predetermined angle. A sheet winding device, wherein the cutting tool according to claim 1, 2 or 3 is used as the cutting tool.

According to the sheet cutting device of the present invention, by using the ultrasonic knife, the rubber or cloth sheet can be cut smoothly on the anvil, and various kinds of materials generated by using the electric heating knife as in the prior art can be obtained. In other words, there is no problem such as burning of the rubber sheet due to M / C trouble, and a problem of requiring a waiting time for temperature rise at the start of work, and the thin rubber sheet can be cut smoothly and reliably. In addition, the sheet can always be cut with a constant quality without the above-mentioned problem of using a rotary knife having a cutting edge on the outer peripheral portion without worrying about the sharpness of the knife.

Accordingly, the sheet cutting tool of the present invention can be suitably used for cutting an industrial air spring, an automobile air spring, a timing belt, and other thin raw rubber sheets, thread-containing thin rubber sheets, and thin cloth sheets. It is also effectively used for the production of cylindrical rubber moldings such as electrophotographic devices such as copiers and printers, and intermediate transfer belts for electrostatic recording devices.

Further, according to the sheet winding apparatus of the present invention provided with the above-mentioned cutting device, the rubber or cloth sheet can be cut smoothly and reliably by the sheet cutting device, so that the sheet can be smoothly wound around the mandrel. When the cut sheet is wrapped around a mandrel, there is no hindrance to the butting of the winding start end and the winding end when the cut sheet is wound around the mandrel. By joining and joining, it is possible to obtain a cylindrical molded product having no gap, unevenness, or the like at the joint.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a sheet cutting device according to an embodiment of the present invention. The sheet cutting device 1 includes an anvil 2 and an ultrasonic knife 3. The anvil 2 supports a rubber or cloth sheet S, and presses the tip of the ultrasonic knife 3 from above,
By moving the knife 3, the sheet S is moved to the knife 3.
And is made of a hard metal such as hard steel, ceramic, or the like.

A guide groove 2a is formed in the anvil 2, and the knife 3 is moved along the upper edge while the tip of the knife 3 is in contact with the upper edge of the guide groove 2a. Thereby, the sheet S such as a thin raw rubber sheet or a thread-containing thin rubber sheet can be cut smoothly. In this case, the anvil 2 may be flat without providing such a guide groove 2a, and if the tip (knife edge) of the knife 3 contacts and is supported by the anvil 2, the sheet S
Cutting is performed without hindrance.

Although not shown, the ultrasonic knife 3 is connected to an ultrasonic generator, and the sheet S is cut by the ultrasonic vibration transmitted from the ultrasonic generator to the tip of the knife 3. It is. In addition, a well-known thing can be used as the ultrasonic knife 3.

According to the sheet cutting tool, as described above, the knife 3 is moved in a predetermined direction while pressing the tip of the ultrasonic knife 3 against the sheet S on the anvil 2 so that the sheet S is moved. In this case, since the knife 3 is constituted by an ultrasonic knife, the rubber sheet and the cloth sheet can be cut easily and smoothly.

FIGS. 2 and 3 show another example of the sheet cutting tool according to the present invention. This sheet cutting tool 1 has an anvil 2 and an ultrasonic knife 3 integrated via a support member 4. This is particularly suitable for cutting a thin cloth.

That is, the sheet cutting tool shown in FIGS. 2 and 3 is connected to a support
Is provided with a holding member 4c having a holding hole 4b into which is inserted and held. The base end of the support pillar portion 4a of the support member 4 is pivotally movable at a predetermined angle to one end of the anvil 2 (preferably, the closest distance between the anvil 2 and the holding portion 4c of the support member 4 is reduced). The anvil 2 and the holding portion 4c are attached by a spring (biasing means) 5 to the anvil 2 and the holding portion 4c.
(Preferably, the anvil 2 and the holding portion 4
c is the closest distance) and when the ultrasonic knife 3 is inserted and held in the holding hole 4b of the holding portion 4c, the tip of the knife 3 presses the anvil 2. Thereby, the holding portion 4c and the anvil 2 are moved against the urging force of the spring 5 more than the close distance between the anvil 2 and the holding portion 4c in a state where the knife 3 is not held by the holding portion 4c. (More than the contact distance), and the tip of the knife 3 and the anvil 2 are
Are pressed against each other.

When a sheet such as a thin cloth is cut using the sheet cutting tool shown in FIGS. 2 and 3, tension is applied in a direction perpendicular to the direction of arrow A in FIG. 2 (arrows B and B 'in FIG. 3).
Direction) By feeding the sheet S onto the anvil 2 in the direction of arrow A, the sheet S can be cut smoothly. In this case, the sheet cutter is moved in the direction of arrow C (A in FIG. 3).
(In the direction opposite to the direction), the sheet S can be cut along with this movement.

According to the sheet cutting device shown in FIGS. 2 and 3, since the anvil 2 and the ultrasonic knife 3 are integrated, the anvil 2 and the ultrasonic knife 3 are separately supported when cutting the sheet S. When the anvil 2 and the knife 3 are separately supported when the tip of the knife 3 is pressed against the anvil 2 by the action of the spring 5, the tip of the knife 3 is pressed against the anvil 2. The sheet S can be cut smoothly and reliably at all times without adjusting the force (pressing force) or changing the pressing force (pressing force) in the case of performing manually. Furthermore, since the knife is an ultrasonic knife,
Unlike a disk knife provided with a cutting blade on the outer peripheral portion, the use thereof does not cause a decrease in cutting and has a long life.

FIG. 4 shows a modification of the sheet cutting tool shown in FIGS. 2 and 3. In this example, the anvil 2 is formed in a circular shape (circular roll shape). The other end of the connecting member 6 whose one end is swingably attached to the base end of the support column 4a is formed in a U-shape as shown in FIG. 5, and is provided between both free ends of the U-shape portion 6a. Shaft 6 provided
b, the circular roll-shaped anvil 2 is rotatably supported. The tip (edge) of the ultrasonic knife 3 abuts (presses) on the outer peripheral surface of the circular roll-shaped anvil 2. Since the anvil 2 rotates, the traveling of the sheet S or the movement of the sheet cutting tool is smooth. Done in In addition,
The other configurations and operational effects of FIG. 4 are the same as those of the sheet cutting tool of FIGS.

FIG. 6 shows an unvulcanized rubber sheet S wrapping device 11 provided with the above-mentioned cutting tool. The wrapping device 11 is an electrophotographic device such as a copying machine or a printer, or an electrostatic device. In manufacturing the intermediate transfer belt used for the recording device,
Unvulcanized rubber sheet S on mandrel performed before rubber vulcanization
It is suitably used as a device for winding the wrap.
The main configuration thereof includes a sheet roll (not shown) for feeding out the unvulcanized rubber sheet S, a mandrel 12 on which the unvulcanized rubber sheet S fed from the sheet roll is attached to the outer peripheral surface, It comprises a cutting tool 10 for cutting the rubber sheet S at a predetermined position, and a first suction pad 13 and a second suction pad 14 provided above the unvulcanized rubber sheet S.

Although not shown, the mandrel 12 and the sheet roll are rotatably supported by a rotating mechanism.
, The unvulcanized rubber sheet S is sequentially rotated from the sheet roll by the mandrel 12.
, And wound around the mandrel 12.

An intermediate roller 15 is disposed between the sheet roll and the mandrel 12 to prevent the rubber sheet S from meandering. The rotational resistance of the intermediate roller 15 is finely adjusted so that tension is not applied to the rubber sheet S as much as possible. The rubber sheet S is sequentially sent out from the sheet roll to the mandrel 12 via the intermediate roller 15.

The first suction pad 13 and the second suction pad 14 are connected to the intermediate roller 15 and the mandrel 12.
Is provided along the width direction of the unvulcanized rubber sheet S above the unvulcanized rubber sheet S that moves between the rubber sheets S. The suction pads 13 and 14 hold the rubber sheet S by suction. is there. The form of these suction pads is not particularly limited, but for example, a vacuum suction type is suitably used.

The cutting tool 10 is provided between the intermediate roller 15 and the mandrel 12. This cutting tool 10 is connected to a moving body 17 slidably mounted in the width direction of the sheet S below a square pillar-shaped rail body 16 provided along the width direction of the unvulcanized rubber sheet S. 1 and an anvil 20 disposed so as to face the cutting edge of the ultrasonic knife 3 via the sheet S. The cutting tool is the same as the cutting tool in FIG. Having a configuration. is there.

The anvil 20 is a long plate made of hard steel and attached to one side of the second suction pad 14 so as to move integrally with the second suction pad 14. .

Next, a series of steps for winding the unvulcanized rubber sheet S around the mandrel 12 using the winding device 11 will be described with reference to FIG.

First, as shown in FIG.
The leading end of the unvulcanized rubber sheet S fed from a sheet roll (not shown) is sucked and held by the first suction pad 13 and the mandrel 12 is rotatably supported.
Next, the first suction pad 13 is moved toward the mandrel 12, and the unvulcanized rubber sheet S is unwound from the sheet roll. As shown in FIG. The uncured rubber sheet S is released by pressing the winding start end of the unvulcanized rubber sheet S against the outer peripheral surface of the mandrel 12 coated with an adhesive as necessary to release the suction holding state by the first suction pad 13. Is wound on the outer peripheral surface of the mandrel 12. Then, as shown in FIG. 7 (C), the unvulcanized rubber sheet S is wound around the mandrel 12 while being unwound from the sheet roll by rotating the mandrel 12, and is rotated by a predetermined angle before the mandrel 12 makes one rotation. At this point, the rotation of the mandrel 12 is temporarily stopped. After the rotation of the mandrel 12 is stopped, as shown in FIG.
At the position before 2, the first suction pad 13 and the second suction pad 14 are adsorbed to the unvulcanized rubber sheet S in a state where they are arranged in parallel, and the unvulcanized rubber sheet S is cut between the two pads.
As a result, the unvulcanized rubber sheet S fed out is cut into a predetermined length to form a winding end and a next winding start end, and at the same time, the winding end is held by the second suction pad 14. At the same time, the next winding start end is suction-held on the first suction pad 13.

In this embodiment, the cutting of the unvulcanized rubber sheet S is performed by the cutting tool 10. That is, in the state of FIG. 7D, in a state where the blade edge of the ultrasonic knife 3 and the anvil 20 are opposed to each other with the sheet S interposed therebetween, the moving body 17 is moved from one end in the width direction of the unvulcanized rubber sheet S. By sliding on the rail body 16 to the other end side, the ultrasonic knife 3 connected to the moving body 17 moves integrally, and the blade portion of the knife cuts the unvulcanized rubber sheet S. Things.

When the ultrasonic knife 3 cuts the unvulcanized rubber sheet S from one end to the other end, the ultrasonic knife 3 rotates by a predetermined angle, and the blade portion of the ultrasonic knife 3 turns the unvulcanized rubber sheet S.
The ultrasonic knife 3 returns to the original position by moving the moving body 17 to the original cutting start position in this state.

Next, as shown in FIG. 7 (E), by rotating the mandrel 12 again to move the second suction pad 14 toward the mandrel, the unvulcanized rubber sheet S is removed from the mandrel. The rotation is stopped when the mandrel 12 makes one rotation. Then, the end of winding of the unvulcanized rubber sheet S is pressed against the outer peripheral surface of the mandrel 12 by the second suction pad 14 and the suction holding state by the second suction pad 14 is released, whereby the unvulcanized rubber sheet S is released. The winding end of S is attached to the outer peripheral surface of the mandrel 12.

As a result, as shown in FIG. 7 (F), a mandrel 12 having an unvulcanized rubber sheet S wound around the outer periphery is obtained. The mandrel 12 is removed from the rotary drive shaft of the rotating means, and the next mandrel is removed. Attached to the rotary drive shaft,
By repeating the operations of FIGS. 7A to 7E,
The continuous winding operation can be performed while the unvulcanized rubber sheet S is unreeled from a sheet roll (not shown).

As described above, according to the winding device 11 of the above embodiment, by using the ultrasonic knife 3 as the cutting means, the unvulcanized rubber sheet S can be cut smoothly and favorably by ultrasonic vibration. In addition, the cut portion of the unvulcanized rubber sheet S is not burned, and the quality of the unvulcanized rubber sheet S is not deteriorated.

Further, according to the winding device 11, since the cut surface of the unvulcanized rubber sheet S cut by the ultrasonic vibration is clean, the unvulcanized rubber sheet wound around the mandrel 12 is formed. The winding start end and the winding end of S can be securely and favorably butted and joined to each other, so that the surface of the cylindrical object can be smoothed and beautifully finished.

The rotating mechanism of the mandrel 12 and the sheet roll and the driving mechanism of the first suction and second suction pads 13 and 14 are not limited as long as the above-described operation can be performed reliably. May be provided, and may be appropriately designed. Further, the control means for controlling the drive mechanism and the rotation mechanism is not particularly limited as long as it can accurately control the above-described operation.

Next, an apparatus for winding a cloth sheet such as a woven cloth provided with the cutting tool of the present invention will be described with reference to FIG. That is, the cloth winding device 30 shown in FIG. 8 includes a rotatably supported sheet roll (not shown) for feeding out the cloth sheet S,
It comprises a guide roll 18 for changing the direction of the cloth sheet S, an intermediate roller 50, a mandrel 19 for winding the cloth sheet S to a predetermined position, and a cutting tool 40 for cutting the cloth sheet. The intermediate roller 50 is a roller provided so that the cloth sheet S pulled out from the sheet roll does not reverse, and rotates freely only in the counterclockwise direction in FIG. Although not shown, the cloth sheet S is provided with a constant tension in the length direction by providing a tension mechanism. In the drawing, reference numerals 60, 60 are small-diameter rollers.

The cutting tool 40 is connected to a square pillar-shaped rail 24 arranged along the width direction of the cloth sheet S by a connecting member 43.
Which is movably mounted via an anvil 4
2 and an ultrasonic knife 41, and has the same configuration as the cutting tool 1 in which the ultrasonic knife 3 and the anvil 2 shown in FIGS. Have.

When winding the cloth sheet S using the cloth winding device 30, the cloth sheet S unwound from the sheet roll is guided by the guide roll 18, the small-diameter roller 6 and the like.
The cloth sheet S is wound around the rotatably supported mandrel 19 at a predetermined angle via the 0, intermediate roller 50, and small-diameter roller 60 in this order, and the winding end of the cloth sheet S is cut by the cutting tool 40.

That is, the cutting of the cloth sheet S performed by the cutting tool 40 is performed while the connecting body 43 is slid along the rail body 24 and the ultrasonic knife 41 and the anvil 42 integrated therewith are moved. The cloth sheet S is cut along a width direction at a predetermined position.

According to the winding device 30 of the above embodiment, similarly to the above-described rubber sheet winding device 11, by using the ultrasonic knife as the cutting means, the cloth sheet S can be cut smoothly and reliably. In this case, it is not necessary to separately support the anvil 42 and the ultrasonic knife 43 when cutting the sheet S, and it is not necessary to perform the cutting. The knife for the anvil when the anvil 42 and the knife 41 are separately supported is not necessary. Pressing force (pressing force) at the tip of
The sheet S is always smoothly and reliably adjusted without any change in the pressing force (pressing force) when adjusting
Can be cut.

[0043]

According to the sheet cutting device of the present invention and the winding device using the same, the use of the ultrasonic knife enables
The rubber or cloth sheet can be cut smoothly on the anvil, and various problems caused by using an electric heating knife as in the past, that is, the problem of burning of the rubber sheet due to M / C trouble, etc., There is no problem requiring a waiting time for temperature rise, and even a thin rubber sheet can be cut smoothly and reliably.Also, there is no problem described above using a rotary knife having a cutting edge on the outer periphery, Sheets can always be cut with constant quality without worrying about sharpness.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a rubber or cloth sheet cutting tool according to one embodiment of the present invention.

FIG. 2 is a front view showing a cutting tool according to another embodiment of the present invention.

FIG. 3 is a schematic perspective view showing a use state of the cutting tool.

FIG. 4 is a front view showing a modification of the cutting tool of FIG. 2;

FIG. 5 is an explanatory view illustrating a connecting member of the cutting tool.

FIG. 6 is a schematic diagram showing a sheet (rubber sheet) winding device according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram for sequentially explaining steps when winding an unvulcanized rubber sheet around a mandrel.

FIG. 8 is a schematic view showing a sheet (cloth sheet) winding device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutting tool 2 Anvil 3 Ultrasonic knife 4 Support member 4c Holding part 5 Spring (biasing means) 11, 30 Winding device 10, 40 Cutting tool 12, 19 Mandrel

Claims (4)

[Claims] 1. A sheet cutting tool comprising an anvil on which a rubber or cloth sheet is supported and cutting means for cutting the rubber or cloth sheet supported by the anvil, wherein an ultrasonic knife is used as the cutting means. A sheet cutting tool, characterized in that: 2. An ultrasonic knife, a supporting member having a holding portion for holding the ultrasonic knife, an anvil swingably attached to the supporting member, and the holding portion and the anvil always being close to each other. 2. The sheet cutting tool according to claim 1, further comprising: urging means for pressing the tip of the ultrasonic knife held by the holding portion against the anvil. 3. The sheet cutting device according to claim 2, wherein the anvil is formed in a circular shape, and is rotatably attached to the support member so that an ultrasonic knife abuts on an outer peripheral portion of the anvil. 4. A sheet roll for feeding a rubber or cloth sheet, a mandrel to which a rubber or cloth sheet fed from the sheet roll is attached to an outer peripheral surface, and a sheet disposed between the sheet roll and the mandrel A cutting device comprising a rubber or cloth sheet wound around the mandrel while being fed from the sheet roll, and a rubber or cloth sheet cut by the cutting device when the mandrel rotates by a predetermined angle. A sheet winding device, wherein the cutting device according to claim 1, 2 or 3 is used as the cutting device.