JPH08257984A - Method and device for cutting elastic long sheet - Google Patents

Abstract

PURPOSE: To always keep a cut width uniform by using a holding part to hold a portion of a long sheet near one end, then moving the long sheet along with the holding means toward a cutting means, and then cutting the other end of the long sheet by the cutting means. CONSTITUTION: When a servomotor 38 is driven, a ball screw 32 is turned via a power transmission belt 36, belt pulleys 34, and the like, and then a moving plate 28, together with a clamp lever 16, is guided by a rail and moved toward a cutting part 44 by a set amount while gripping one end of a long sheet 14. When the front end of the long sheet 14 comes between tension members 50A, 50B and a push-up lever 58, the push-up lever 58 is moved upward by a cylinder 60, and a bifurcated plate 47 is moved downward by a cylinder 64. Therefore, both of the longitudinal ends of the long sheet are pulled by the tension members 50A, 50B in opposite directions, and in that state the long sheet 14 is cut into a predetermined width by the actuation of a traveling cutter 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a long sheet-like material having elasticity such as rubber and a cutting apparatus therefor, and more specifically to a long sheet-like object capable of having a uniform cut width. The present invention relates to a cutting method and a cutting device therefor.

[0002]

2. Description of the Related Art Conventionally, the following method has been adopted as a method of cutting an elastic sheet-like long object. That is, one end of a sheet-shaped long object is sandwiched between a feed roller rotated by a motor and a pressing roller that is arranged to face the feed roller and is rotatably supported. In this sandwiched state, the motor is driven and the feed roller is rotated, and by this rotation, the sheet-shaped long object is conveyed to the cutting portion, and at the cutting portion, the other end of the sheet-shaped long object is moved in the width direction. Cut along. Then, the cut member is used as a cleaning blade or an ink squeegee blade for removing the developer adhering to the photosensitive drum of the copying machine. A plurality of cleaning blades and the like can be obtained by performing the above cutting by intermittently feeding a long sheet-like object by driving a motor.

However, in the case of intermittently conveying and cutting a sheet-shaped long product as described above, the thickness of the sheet-shaped long product is not uniform throughout.
In addition, when the sheet-shaped long object is conveyed, the surface hardness of the sheet-shaped long object is not uniform and the pressing pressure between the feed roller and the pressing roller is not constant. ) Occurs. As described above, when the deviation occurs, there is a problem that the feed amount of the sheet-shaped long object to the cutting portion cannot be kept constant and the cutting width of the sheet-shaped long object cannot be constant.

[0004]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a method for cutting a sheet-shaped long object and a cutting apparatus therefor capable of making a cut width uniform.

[0005]

The present invention has been proposed in order to achieve the above object, and is characterized by the following points. That is, according to the present invention, the vicinity of one end of the elastic sheet-shaped long object is held by the holding unit, and the sheet-shaped long object is moved together with the holding unit toward the cutting means, The other end of the scale,
There is provided a method for cutting a long sheet-like material having elasticity, which is characterized in that the cutting means cuts along the width direction of the long-shaped article.

Further, according to the present invention, the vicinity of one end of the elastic sheet-like long object is held by the holding portion, and the sheet-like long object is moved together with the holding portion toward the cutting means, The other end side of the sheet-shaped long object is brought into contact with a supporting base having an upwardly curved surface to bend the sheet-shaped long object, and the cutting section cuts the curved section along the width direction of the long object. A method for cutting a long sheet-like material having elasticity is provided.

Further, according to the present invention, there is provided a method for cutting a sheet-shaped material, which conveys the sheet-shaped material while supplying air to the lower surface of the sheet-shaped material.

Further, according to the present invention, a conveying means for conveying the sheet-shaped long object in the longitudinal direction while holding the vicinity of one end of the elastic sheet-shaped long object, and a curved surface directed upward. And a support base on which the other end side of the sheet-like long object conveyed by the conveying means is in contact with the curved surface,
Tensile force imparting means for imparting a tensile force in the longitudinal direction of the sheet-shaped long object to the curved portion while sandwiching the curved portion with the support base, and the tensile force is imparted by the tensile force imparting means. There is provided a cutting device for a sheet-shaped long object having elasticity, comprising: a cutting unit that cuts a curved portion along a width direction of the sheet-shaped long object.

Further, according to the present invention, there is provided a cutting device for a sheet-shaped long object provided with air supply means for supplying air to the lower surface of the sheet-shaped long object.

[0010]

In the method of cutting an elastic sheet-like long object according to the first aspect of the present invention, when supplying the elastic sheet-like elongated object to the cutting means, the vicinity of one end of the sheet-like elongated object is held. Hold by department. Then, in this holding state, the sheet-like long object is moved toward the cutting means together with the holding part. The other end side of the sheet-shaped long object conveyed toward the cutting means is cut by the cutting means along the width direction of the long object.

According to the first aspect of the invention, the sheet-shaped elongated member is
Since the rollers are not conveyed by being rotated while being sandwiched between the pair of rollers, but are conveyed while being held by the holding portion as described above, there is no deviation during the conveyance. It is possible to reliably supply a predetermined amount of the sheet-shaped long object to the cutting means. That is, according to the invention of claim 1, even if the thickness of the sheet-shaped long object is not uniform over the whole, or even if the hardness of the sheet-shaped long object is not uniform over the whole, Only a predetermined length can be reliably supplied to the cutting means. Therefore, the sheet-shaped long object is cut into a uniform width dimension by the cutting means. A plurality of members can be obtained by performing such cutting repeatedly by intermittently feeding the sheet-shaped long object.

In the method of cutting an elastic sheet-like long object according to the invention of claim 2, when supplying the elastic sheet-like elongated object to the cutting means, the vicinity of one end of the sheet-like elongated object is held. Hold by department. Then, in this holding state, the sheet-like long object moves together with the holding portion toward the cutting means. The other end side of the sheet-shaped long object conveyed toward the cutting means abuts against the curved surface of the support table and bends, and the cutting means cuts the curved portion along the width direction of the long object. It

According to the second aspect of the present invention, the same action as that of the first aspect of the invention is exerted, and as described above, the other end of the sheet-like elongated member contacts the curved surface of the support base. Since it bends in contact and the curved portion is cut, the cutting surface resistance to the cutting means can be reduced.

In the method of cutting a long sheet-like material having elasticity according to the invention of claim 3, air is supplied to the lower surface of the long sheet-like object when the long sheet-like object is conveyed toward the cutting means. To be done. Therefore, when the sheet-shaped long object is guided by the guide member arranged on the lower surface thereof, the coefficient of dynamic friction between the sheet-shaped long object and the guide member is reduced, and the sheet-shaped long object is smoothly transported. It

Further, in the sheet-shaped long object cutting apparatus according to the invention of claim 4, the elastic sheet-shaped long object is conveyed in the longitudinal direction with one end portion thereof being held by the conveying means. It The other end of the conveyed sheet-like long object is in contact with the upward curved surface of the support base and is curved along the curved surface. In this state, the curved portion is sandwiched between the support base and the tension member, and a tensile force in the longitudinal direction of the sheet-shaped long object is applied. In this tensile force applied state, the cutting means cuts the curved portion along the width direction of the sheet-shaped long object.

As described above, in the elastic sheet-shaped long object cutting device according to the invention of claim 4, the sheet-shaped long object is conveyed by being rotated by the rollers while being sandwiched between the pair of rollers. As described above, since the sheet-shaped long object is conveyed while being held by the conveying means as described above, it is possible to reliably supply the sheet-shaped long object to the cutting means by a predetermined amount. That is, according to the cutting apparatus of claim 4, even if the thickness of the sheet-shaped long object is not uniform throughout, or even if the hardness of the sheet-shaped elongated object is not uniform throughout, An object can be reliably supplied to the cutting means by a predetermined length. Therefore, the sheet-like long object is cut into a uniform width dimension by the cutting means.

Further, in the apparatus for cutting a long sheet-like material having elasticity according to the invention of claim 5, in addition to the structure of the cutting apparatus according to the fifth aspect, an air supply for supplying air to the lower surface of the long sheet-shaped object. Means are provided. When the sheet-shaped long object is conveyed to the cutting means by the cutting device according to the fifth aspect of the invention, air is supplied to the lower surface of the sheet-shaped long object by the air supply means. Therefore, the sheet-shaped long object is conveyed in a state where the dynamic friction coefficient with the guide member arranged on the lower surface is reduced, and the sheet-shaped long object is smoothly conveyed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an apparatus for manufacturing a cleaning blade by cutting an elastic sheet-like long object along the width direction. The cutting device 10 includes a guide table 12, and the guide table 12 is provided with side plates 12A on the side surfaces except the upper surface and the lower surface in FIG.
Air from a blower 42, which will be described later, is prevented from flowing out from the side portion of the guide table 12.

As shown in FIG. 2, an upper plate 13 having a plurality of air passage holes 13A is provided on the upper side of the guide table 12 in FIG. The elongated member 14 is placed. A pair of rails (not shown) are provided in the guide table 12 and function as a guide for the moving plate 28.

As shown in FIG. 1, the cutting device 10 is provided with a holding means 15, which allows the sheet-shaped long object 14 to be cut.
Is designed to hold one end of. Holding means 15
Includes a clamp lever 16 and a holding piece 16B extending from the base portion 16A thereof to the lower right in FIG. Then, from the tip of this holding piece 16B, the holding claw 1
6C hangs down and is used for holding the sheet-shaped long object 14.

On the right end side of the base portion 16A in FIG.
The fulcrum shaft 18 protruding from the bracket 21 shown in FIG. 2 fixed to the No. 8 is inserted, and the clamp lever 16 is
It is rotatable about this fulcrum shaft 18. Also,
As shown in FIG. 1, the clamp lever 16 has a base portion 16A.
The pin 20 is provided on the left end side of the
Corresponds to the clamp opening / closing lever 22.

The clamp opening / closing lever 22 is connected to a rod 26 which is integrated with a piston of an air cylinder 24 fixed to a moving plate 28, and a position at which the pin 20 can be pushed down by the air cylinder 24. And is reciprocated between the pin 20 and a position separated from the pin 20. In addition, the base portion 16 of the clamp lever 16
A clamp spring 30 is interposed between the moving plate 28 and the end of the A opposite to the fulcrum shaft 18, and the clamp spring 16 causes the clamp lever 16 to center on the fulcrum shaft 18. The rotational force of 1 in the clockwise direction is applied.

A female screw is formed on the extending portion 28B extending downward from the moving plate 28 in FIG. 1, and this female screw is screwed into the pole screw 32. Also, the moving plate 2
8 is formed with a support piece 28A extending toward the conveyance direction of the sheet-shaped long object 14, and one end portion of the sheet-shaped long object 14 is sandwiched by the support piece 28A and the holding claw 16C. It is supposed to do. Clamp lever 1 above
As shown in FIG. 2, a pair of the clamp opening / closing lever 22, the clamp spring 30, and the clamp spring 30 are provided close to each other in the width direction of the sheet-shaped elongated object 14 (direction of arrow A in FIG. 2). Then, the pair of clamp levers 16 and the clamp opening / closing lever 2
Although not shown, a pair of clamp springs 30 are provided at intervals in the direction of arrow A in FIG. That is, the sheet-shaped long object 14 is held at four positions by the holding claws 16C of the clamp lever 16 and the moving plate 28.

As shown in FIG. 1, a driven belt wheel 34 is fixed to one end of the pole screw 32, and a power transmission belt 36 is wound around the driven belt wheel 34. Further, the power transmission belt 36 is wound around a drive side belt wheel 40 fixed to a drive shaft of a servo motor 38. As a result, when the servo motor 38 is driven, the servo motor 38 is driven through the drive side belt wheel 40, the power transmission belt 36, and the driven side belt wheel 34.
Driving force of the pole screw 32 is transmitted to the pole screw 32.
Is designed to rotate.

Below the guide table 12, the blower 4 is installed.
2 is provided, and this blower 42 is connected to a pipe line 43 connected to a through hole 19A formed in a lower plate 19 arranged to face the upper plate 13. And the blower 42
The air from the above is ejected to the lower surface of the sheet-shaped long object 14 through the conduit 43 and the air passage hole 13A.

Further, in the cutting device 10, a downstream side of the holding means 15 in the conveying direction of the long sheet-like material 14 (right side in FIG. 1).
A cutting portion 44 is provided in the. This cutting portion 44 is
It is equipped with a traveling cutter 46, and the traveling cutter 46
It is supported so as to be movable in the vertical direction of FIG. 1 and in the direction orthogonal to the paper surface of FIG. 1 (the width direction of the sheet-shaped elongated member 14).

The tip of the traveling cutter 46 is inserted between the pair of tension members 50A and 50B.
Each of the tension members 50A and 50B is made of iron,
A claw portion 52A is formed at the lower end portion of the tension members 50A and 50B.

A shaft 56 fixed to a mounting member (not shown) is inserted through each of the tension members 50A and 50B, and the tension members 50A and 50B are provided with the shaft 56.
It is possible to rotate around. A drive pin 45 is provided on each of the tension members 50A and 50B so as to project therefrom. Each drive pin 45 has a bifurcated plate 47 to be described later.
It corresponds to the long hole 47A formed in (see FIGS. 3 and 4). Further, as shown in FIG. 3, four grooves 51 are formed in the lower portion of the tension member 50B.
When the sheet-shaped long object 14 is conveyed, the holding pieces 16B are formed in a shape such that when the four clamp levers 16 approach the tension member 50B, the holding pieces 16B enter the tension member 50B. As a result, the long sheet 14 can be cut to near the end on the side opposite to the conveying direction, and the yield is improved.

As shown in FIGS. 3 and 4, the bifurcated plate 47 includes an arm 47C extending from the base portion 47B toward the tension member 50A and an arm 47D extending from the base portion 47B toward the tension member 50B. I have it. An elongated hole 47A is formed in each of the arms 47C and 47D, and the drive pin 45 of the tension members 50A and 50B is inserted into each of the elongated holes 47A. The bifurcated plate 47 is shown in FIG.
1 is driven by the air cylinder 64 shown in FIG. 1, and when the forked plate 47 is driven downward, each of the drive pins 47 forms an elongated hole 47A as shown in FIG. It is adapted to hit the inner wall surface on the upper side in FIG. As a result, the tension member 50A is rotated counterclockwise in FIG. 4 about the shaft 56, and the tension member 50B is rotated clockwise in FIG. 5 about the shaft 56.

As shown in FIG. 1, the cutting section 44 is provided with a push-up bar 58 below the traveling cutter 46. The upper part of the push-up bar 58 in FIG. 1 is formed of urethane rubber (hardness; 80 ° Shore A). A curved surface 58A is formed at an upper end portion of the push-up bar 58, that is, a portion facing the claw portion 52A and the traveling cutter 46. In this embodiment, the curved surface 58A has a curvature of R50. The push-up bar 58 is connected to the rod 62 of the piston of the air cylinder 60, and by the air cylinder 60, the vertical direction of FIG.
The traveling cutter 46 is moved toward and away from the traveling cutter 46.

The cutting device 10 configured as described above is provided with a control device (not shown), and by the control device, the amount of conveyance of the sheet-shaped elongated object 14 and the sheet-shaped elongated object 14 are controlled.
The cutting width of is set to a predetermined value. Moreover, the air cylinder 24 and the servo motor 3 are controlled by the control device.
8, traveling cutter 46, push-up bar 58, air cylinder 6
0, the drive of the air cylinder 64 is controlled.

Hereinafter, a case where the sheet-like long object 14 is cut by the cutting device 10 according to the present embodiment will be described. First, the long sheet 14 is placed on the upper plate 13, and the air cylinder 24 is driven. This allows
The clamp opening / closing lever 22 contacts the pin 20 and pushes the pin 20 downward against the biasing force of the clamp spring 30.

As a result, the clamp lever 16 is rotated counterclockwise in FIG. 1 about the fulcrum shaft 18, and a gap is formed between the holding claw 16C and the moving plate 28. Insert one end of the sheet-shaped long member 14 into this gap, and then
The rod 26 is moved to the left side in FIG. 1 by the air cylinder 24, and the clamp opening / closing lever 22 is driven upward in FIG. As a result, the clamp opening / closing lever 22 moves the pin 20
The clamp opening / closing lever 22 is separated from the clamp spring 3
By the urging force of 0, the fulcrum shaft 18 is rotated in the clockwise direction in FIG. 1, and one end of the sheet-shaped elongated member 14 is clamped by the holding claw 16C and the support piece 28A.

In this state, the servo motor 38 is turned on. As a result, the driving force of the servo motor 38 is transmitted to the pole screw 32 via the power transmission belt 36 and the driven side pulley 34. This allows the pole screw 3
2 is rotated, and the clamp lever 16 is rotated by this rotation.
At the same time, the movable plate 28 is guided by a pair of rails (not shown) while moving one end of the sheet-shaped elongated member 14 and is moved to the cutting portion 44 side by an amount preset by the control device. When the sheet-like long object 14 is conveyed, the rollers are not conveyed by being rotated by the pair of rollers, but are held by the crank lever 16 and the moving plate 28 as described above. Since it is conveyed by the sheet-shaped long object, a certain amount of the long sheet-like object is surely cut.
4 is transported.

When the sheet-shaped long member 14 is moved, air from the blower 42 is supplied to the lower surface of the sheet-shaped long member 14 so that the dynamic friction coefficient between the upper plate 13 and the sheet-shaped long member 14 is increased. Since the long sheet 14 is conveyed in a small state, the long sheet 14 can be smoothly conveyed.

With the end of the sheet-shaped elongated member 14 on the conveying direction side between the tension members 50A and 50B and the push-up bar 58, the push-up lever 58 is driven upward by the air cylinder 60 in FIG. At the same time, the bifurcated plate 47 is moved downward in FIG. 1 by the air cylinder 64. Thereby, the claw portions 52 of the tension members 50A and 50B are provided.
A contacts the curved portion of the sheet-shaped long member 14 curved along the curved surface 58A, and the tension member 50A rotates about the shaft 56 in the counterclockwise direction in FIG.
The tension member 50B rotates about the shaft 56 in the clockwise direction in FIG.

As a result, in the curved portion of the sheet-shaped elongated member 14, both ends of the sheet-shaped elongated member in the longitudinal direction are respectively hooked by the claw portions 52A of the tension members 50A and 50B. Are pulled in opposite directions along the longitudinal direction of the. In this state, the traveling cutter 46 is lowered by an air cylinder (not shown) to come into contact with the curved portion, and the traveling cutter 46 is moved in the width direction of the sheet-shaped long object 14 (direction orthogonal to the paper surface of FIG. 1). It As a result, the long sheet 14 is cut into a predetermined width. In the cutting device 10 according to the present embodiment, the above cutting is intermittently performed by the control of the control device.

In the above cutting, the tension member 50B is formed with the grooves 51 by the number corresponding to the clamp levers 16, and the holding pieces 16B of the respective clamp levers 16 moving in the direction of the arrow B in FIG. Since it is configured so as to enter the inside of the sheet 51, the sheet-shaped long object 14 can be supplied to the cutting portion 44 side by that amount. Therefore, a larger number of cleaning blades can be obtained from the sheet-shaped elongated member 14.

In the present embodiment, as described above, since each of the longitudinal end portions of the curved portion of the sheet-shaped elongated member 14 is cut while being pulled in opposite directions along the longitudinal direction, the traveling cutter is used. The cutting surface resistance with respect to 46 is reduced, and the fine movement of the traveling cutter 46 at the time of cutting is suppressed. As a result, the squareness of the corner formed by cutting and the straightness of the corner ridge line are sufficiently secured, and the side surface of the ridge line. Even good accuracy is guaranteed. In this embodiment, the curvature of the curved surface 58A is set to R50.
The curvature of the curved surface 58A is R30 to R30.
It can be appropriately changed within the range of 80.

[0040]

As described above, according to the present invention, it is possible to provide a method and apparatus for cutting a sheet-like long object capable of making the cut width uniform.

[Brief description of drawings]

FIG. 1 is a side view of a device for cutting a long sheet-like material having elasticity according to an embodiment of the present invention.

FIG. 2 is a perspective view of a holding means in the cutting device of FIG.

FIG. 3 is an exploded perspective view illustrating a combined state of a tension member and a bifurcated plate in the cutting device of FIG.

4 is a plan view of a cutting unit in the cutting device of FIG. 1. FIG.

[Explanation of reference numerals] 10 cutting device 14 sheet-like long object 15 holding means (holding part) 44 cutting part (cutting means) 58 push-up bar (support base)

Claims (5)

[Claims] 1. An elastic sheet-like long object is held near one end by a holding unit, and the sheet-like long object is moved together with the holding unit toward a cutting means to obtain the sheet-like long object. A method for cutting a long sheet-like material having elasticity, characterized in that the other end side is cut along the width direction of the long-shaped article by the cutting means. 2. An elastic sheet-shaped long object is held near one end by a holding unit, and the sheet-shaped long object is moved together with the holding unit toward a cutting means, and the sheet-shaped long object is moved. The other end side is brought into contact with a support base having an upwardly curved surface to be curved, and the cutting portion cuts the bending portion along the width direction of the long object. A method for cutting a long sheet-like material having elasticity. 3. The sheet-shaped long object is conveyed while air is supplied to a lower surface of the sheet-shaped long object.
A method for cutting a sheet-like material having the elasticity described above. 4. A transporting means for transporting the sheet-like long object in a longitudinal direction while holding the vicinity of one end of the elastic sheet-like elongated object, and a transporting means provided with a curved surface facing upward. A support table whose other end side is conveyed to the curved surface by the other end side thereof, and a longitudinal direction of the sheet-shaped long object on the curved portion with the curved portion being sandwiched by the support table. And a cutting means for cutting the curved portion to which the tensile force is applied by the tensile force applying means along the width direction of the sheet-shaped long object. A device for cutting a long sheet-like object having elasticity, which is characterized by the above. 5. The apparatus for cutting a long sheet-like product according to claim 4, further comprising air supply means for supplying air to the lower surface of the long long sheet-like product.