JP3245321B2 - Method of cutting long sheet-like object having elasticity and its cutting device - Google Patents

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 object having elasticity such as rubber and the like, and more particularly, to a method for cutting a long sheet-like object having a uniform cutting width. The present invention relates to a cutting method and a cutting device.

[0002]

2. Description of the Related Art Conventionally, the following methods have been employed as a method of cutting a long sheet-like object having elasticity. That is, one end of the sheet-like long object is sandwiched between a feed roller rotated by a motor and a press roller disposed to be opposed to the feed roller and rotatably supported. In this sandwiched state, the motor is driven, the feed roller is rotated, and by this rotation, the long sheet-like material is conveyed to the cutting section, and at the cutting section, the other end of the long sheet-like material is moved in the width direction. Cut along. The cut member is used for a cleaning blade, an ink squeegee blade, or the like 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 intermittently feeding the sheet-shaped long object by the driving of the motor and repeatedly performing the cutting as described above.

However, when the long sheet is intermittently conveyed and cut as described above, the thickness of the long sheet is not uniform throughout.
Furthermore, when the sheet-shaped long object is conveyed due to uneven surface hardness over the entire surface or a non-constant pressing force between the feed roller and the pressing roller, the sheet may be displaced (beveled). ) Occurs. As described above, when the displacement occurs, the feeding amount of the sheet-like long object to the cut portion cannot be kept constant, and there is a problem that the cutting width of the sheet-like long object cannot be made constant.

[0004]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method and a device for cutting an elastic sheet-like long object having a uniform cutting width.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above-mentioned object, and has the following features. That is, according to the present invention, the vicinity of one end of the elastic sheet-shaped long object is held by the holding portion having a claw-shaped tip, and air is applied to the lower surface of the sheet-shaped elongated object.
While supplying the traveling sheet-like elongated material together with the holding portion
The sheet-like long object is moved toward a cutting means including a cutter, and the other end of the long sheet-like object has a curved surface facing upward.
A method for cutting an elastic sheet-shaped long object, comprising: abutting against a support table; fixing the curved portion in a curved state; and cutting the curved portion along the width direction of the long object by the cutting means. Is provided.

Further, according to the present invention, the vicinity of one end of the sheet-like long object having elasticity is formed by a claw-shaped holding portion.
While holding it , supply air to the lower surface of the sheet-like long object.
A feeding means for feeding the sheet-shaped long object in the longitudinal direction while feeding, and a curved surface facing upward, the other end of the sheet-shaped long object conveyed by the feeding means being in contact with the curved surface. A support table to be in contact with, a tensile force applying means for applying a tensile force in the longitudinal direction of the long sheet-like object to the curved portion in a state where the curved portion is sandwiched by the support table, and the tensile force applying device Cutting means for cutting a curved portion to which a tensile force has been applied by a traveling cutter along the width direction of the long sheet-like object, and cutting the long sheet-like object having elasticity. An apparatus is provided.

[0007]

[0008]

[0009]

[0010]

In the method for 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 subjected to a tip. Is held by a claw-shaped holding portion . And
In this holding state, the sheet-like long object is moved toward the cutting means together with the holding section. The traveling means in the present invention
The other end of the sheet-like long object conveyed toward the cutting means is cut by the cutter along the width direction of the long object.

According to the present invention, the long sheet-like object is not conveyed by the rotation of the rollers while being sandwiched between the pair of rollers, but has a claw-shaped tip as described above.
The sheet is conveyed in a state where it is pressed and held by the unit, so there is no shift during conveyance, and
By the holding means, a predetermined length of the sheet-like long object can be reliably supplied to the cutting means. Therefore , even if the thickness of the sheet-like long object is not uniform over the whole, furthermore, even if the hardness of the sheet-like long object is not uniform over the whole, the sheet-like long object can be reliably cut by a predetermined length to the cutting means. Can supply. Accordingly, the sheet-like long object is cut into a uniform width by the cutting means. By repeatedly performing such cutting by intermittently feeding the sheet-like long object, a plurality of members can be obtained.

[0012] When supplying a sheet-like elongated having a resilient to the cutting means, the near one end of the sheet-like long products,
The tip is held by a claw-shaped holding portion. Then, in this holding state, the sheet-like long object moves together with the holding section toward the cutting means. The other end side of the sheet-like long material which is conveyed towards the cutting means is in contact with the curved surface of the support, it is further fixed in a state of being sandwiched tension member on an instruction table, travel mosquito
The curved portion is cut along the width direction of the long object by the cutter.

Therefore , as described above, the other end side of the long sheet-shaped object comes into contact with the curved surface of the support table and bends, and this curved portion is cut, so that the cut surface resistance to the cutting means is small. it can.

Further, in the present invention, air is supplied to the lower surface of the long sheet material when the long sheet material is transported toward the cutting means. Therefore, when the sheet-like long object is guided by the guide member arranged on the lower surface thereof, the coefficient of kinetic friction between the sheet-like long object and the guide member is reduced, and the conveyance of the sheet-like long object is smoothly performed. You.

In the apparatus for cutting a long sheet-like object according to the second aspect of the present invention, the long sheet-like object having elasticity is conveyed in the longitudinal direction with one end portion being held by the conveying means. You. The transported sheet-like long object has the other end side abutting on a curved surface facing upwards of the support table and is curved along the curved surface. In this state, the bending portion is sandwiched between the support base and the tension member, and a tensile force in the longitudinal direction of the long sheet-like object is applied. In this tensile force applying state, the curved portion is cut along the width direction of the long sheet-like object by the cutting means.

As described above, in the apparatus for cutting a long sheet-like object having elasticity according to the second aspect of the present invention, the long sheet-like sheet is conveyed by rotating the rollers while being held between a pair of rollers. Instead of being
Since the sheet is conveyed while being held by the claw-shaped holding unit , the sheet-like long object can be reliably supplied to the cutting means by a predetermined amount. Therefore , even if the thickness of the sheet-like long object is not uniform over the whole, and even if the hardness of the sheet-like long object is not uniform over the whole, the sheet-like long object is reliably cut by a predetermined length. Can be supplied to
Therefore, the sheet-like long object is cut into a uniform width by the cutting means.

Further, in the apparatus for cutting a long sheet-like object having elasticity according to the present invention, when the long sheet-like article is conveyed.
Further, an air supply means for supplying air to the lower surface of the sheet is provided. For this reason, the long sheet-like object is conveyed in a state where the coefficient of kinetic friction with the guide member arranged on the lower surface thereof is reduced, and the conveyance of the long sheet-like object is smooth.

[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 a width direction. The cutting device 10 includes a guide table 12, and the guide table 12 is provided with a side plate 12A on a side surface excluding an upper surface and a lower surface in FIG.
Air from a blower 42 described later is prevented from flowing out from the side of the guide table 12.

As shown in FIG. 2, an upper plate 13 having a plurality of air passage holes 13A is provided above the guide table 12 in FIG. The long object 14 is placed. A pair of rails (not shown) are provided in the guide table 12 and function as guides for the movable plate 28.

As shown in FIG. 1, the cutting apparatus 10 is provided with a holding means 15 so that the sheet-like long object 14
Is held at one end. Holding means 15
Has a clamp lever 16 and a holding piece 16B extending obliquely downward and rightward in FIG. 1 from a base 16A thereof. Then, from the tip of the holding piece 16B, the holding claw 1
6C is suspended, and is used for holding the sheet-like long object 14.

At the right end of the base 16A in FIG.
8, a fulcrum shaft 18 projecting from a bracket 21 shown in FIG. 2 is inserted therethrough.
The fulcrum shaft 18 is rotatable. Also,
As shown in FIG. 1, a base 16A is provided on the clamp lever 16.
A pin 20 protrudes from the left end of the
Corresponds to the clamp opening / closing lever 22.

The clamp opening / closing lever 22 is connected to a rod 26 integrated with a piston of an air cylinder 24 fixed to a movable plate 28, and is located at a position where the pin 20 can be pressed down by the air cylinder 24. , And the pin 20 is reciprocated. Also, the base 16 of the clamp lever 16
A clamp spring 30 is interposed between the movable plate 28 and the end opposite to the fulcrum shaft 18 of A, and the clamp lever 16 is moved by the clamp spring 30 around the fulcrum shaft 18. 1, a clockwise rotational force is applied.

A female screw is formed on an extension 28B extending downward from FIG. 1 from the movable plate 28, and the female screw is screwed to a pole screw 32. In addition, moving plate 2
8, a support piece 28A extending in the transport direction of the sheet-like long object 14 is formed, and one end of the sheet-like long object 14 is held between the support piece 28A and the holding claw 16C. It is supposed to. The above clamp lever 1
6, a pair of the clamp opening / closing lever 22 and the clamp spring 30 are provided close to each other in the width direction (the direction of arrow A in FIG. 2) of the sheet-like long object 14, as shown in FIG. The pair of clamp levers 16 and the clamp opening / closing levers 2
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 long sheet-like 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 belt wheel 40 fixed to a drive shaft of a servomotor 38. Thus, when the servo motor 38 is driven, the servo motor 38 is driven via the driving belt wheel 40, the power transmission belt 36, and the driven belt wheel 34.
Is transmitted to the pole screw 32, and the pole screw 32
Is designed to rotate.

Below the guide table 12, a blower 4
The blower 42 is connected to a conduit 43 connected to a through hole 19A formed in the lower plate 19 disposed opposite to the upper plate 13. And blower 42
Is ejected to the lower surface of the long sheet-like object 14 through the pipe 43 and the air passage hole 13A.

Further, the cutting device 10 has a downstream side (a right side in FIG. 1) of the holding means 15 in the conveying direction of the long sheet-like material 14.
Is provided with a cutting portion 44. This cutting section 44
The traveling cutter 46 is provided.
It is supported movably in the vertical direction in FIG. 1 and in the direction perpendicular to the paper surface of FIG. 1 (the width direction of the long sheet-like material 14).

The tip of the traveling cutter 46 is inserted between a 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 a lower end portion of the drawing 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
It can be rotated around. A drive pin 45 is protruded from each of the tension members 50A and 50B.
(See FIG. 3 and FIG. 4). As shown in FIG. 3, four grooves 51 are formed in the lower portion of the tension member 50B.
Is formed in such a shape that when the four clamp levers 16 approach the tension member 50B when the sheet-like long object 14 is conveyed, the holding piece 16B enters the tension member 50B. Thereby, the sheet-like long object 14 can be cut to near the end on the opposite side to the conveying direction, and the yield is improved.

As shown in FIGS. 3 and 4, the forked plate 47 includes an arm 47C extending from the base 47B toward the tension member 50A and an arm 47D extending from the base 47B toward the tension member 50B. Have. Each of the arms 47C and 47D is provided with a long hole 47A, and the drive pin 45 of each of the tension members 50A and 50B is inserted into each of the long holes 47A. The bifurcated plate 47 is shown in FIG.
When the forked plate 47 is driven downward by the air cylinder 64 shown in FIG. 1, each of the drive pins 47 forms an elongated hole 47A as shown in FIG. It hits the inner wall surface on the upper side in FIG. Thus, the tensile member 50A is rotated in the counterclockwise direction in FIG. 4 around the shaft 56, tensile member 50B is adapted to be rotated in the clockwise direction of FIG. 4 around the shaft 56.

As shown in FIG. 1, the cutting section 44 has 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, at a portion opposed to the claw portion 52A and the traveling cutter 46. In the present embodiment, the curvature of the curved surface 58A is R50. The push-up bar 58 is connected to the rod 62 of the piston of the air cylinder 60, and is moved up and down in FIG.
The moving cutter 46 is moved in a direction approaching and separating from the traveling cutter 46.

The cutting device 10 configured as described above includes a control device (not shown). The control device controls the transport amount of the sheet-like long object 14 and the sheet-like long object 14.
Is set to a predetermined value. Further, the air cylinder 24, the servo motor 3
8, traveling cutter 46, push-up bar 58, air cylinder 6
0, the driving 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 sheet-like long object 14 is placed on the upper plate 13 and the air cylinder 24 is driven. This allows
The clamp opening / closing lever 22 comes into contact with the pin 20 and pushes the pin 20 downward against the urging 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. One end of the sheet-like long object 14 is inserted into this gap,
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 is
And the clamp opening / closing lever 22 is moved from the clamp spring 3
Due to the urging force of 0, the sheet-like long object 14 is rotated clockwise in FIG. 1 around the fulcrum shaft 18, and one end of the sheet-like long object 14 is held between the holding claw 16C and the support piece 28A.

In this state, the switch of the servo motor 38 is turned on. Thus, the driving force of the servo motor 38 is transmitted to the pawl screw 32 via the power transmission belt 36 and the driven belt wheel 34. Thereby, the pole screw 3
2 is rotated, and this rotation causes the clamp lever 16 to rotate.
At the same time, the moving plate 28 is guided by a pair of rails (not shown) and moved toward the cutting section 44 by an amount set in advance by the control device while holding one end of the long sheet-shaped object 14. When the sheet-like long object 14 is conveyed, it is not conveyed by rotating the rollers while being sandwiched by a pair of rollers, but is held by the crank lever 16 and the moving plate 28 as described above. , So that the sheet-like long object is surely cut by a predetermined amount.
4 is carried.

When the sheet-like long object 14 moves, air from the blower 42 is supplied to the lower surface of the sheet-like long object 14, and the dynamic friction coefficient between the upper plate 13 and the sheet-like long object 14 is reduced. Since the sheet-like long object 14 is conveyed in a small state, the conveyance of the sheet-like long object 14 can be performed smoothly.

The push-up lever 58 is driven upward by the air cylinder 60 in FIG. 1 in a state where the end of the sheet-like long object 14 in the transport direction reaches between the pulling members 50A and 50B and the push-up bar 58. At the same time, the bifurcated plate 47 is moved downward in FIG. 1 by the air cylinder 64. Thereby, each claw 52 of the tension members 50A, 50B
A comes into contact with the curved portion of the long sheet-like object 14 curved along the curved surface 58A, and the tension member 50A rotates counterclockwise in FIG.
The tension member 50B rotates around the shaft 56 in the clockwise direction in FIG.

As a result, in the curved portion of the long sheet-like object 14, each of both ends in the longitudinal direction of the long sheet-like object is held by the claw 52A of each of the tension members 50A, 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 long sheet-like object 14 (a direction perpendicular to the plane of FIG. 1). You. Thereby, the sheet-like long object 14 is cut into a predetermined width. In the cutting device 10 according to the present embodiment, the above cutting is performed intermittently under the control of the control device.

In the above-described cutting, the grooves 51 are formed in the tension member 50B by the number corresponding to the clamp levers 16, and the holding pieces 16B of each clamp lever 16 moving in the direction of arrow B in FIG. Since it is configured to enter the inside of the sheet 51, the sheet-like long object 14 can be supplied to the cutting section 44 side. Therefore, more cleaning blades can be obtained from the sheet-like long object 14.

In this embodiment, as described above, each of the two longitudinal ends of the curved portion of the sheet-like long object 14 is cut while being pulled in the opposite direction along the longitudinal direction. The cutting surface resistance to the cutting surface 46 is reduced, and the fine movement of the traveling cutter 46 at the time of cutting is suppressed, whereby the squareness of the corner formed by cutting and the straightness of the corner ridge are sufficiently ensured, Even good accuracy is guaranteed. In the present embodiment, the curvature of the curved surface 58A is set to R50.
However, the curvature of the curved surface 58A is R30 to R30.
It can be changed appropriately within the range of 80.

[0040]

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

[Brief description of the drawings]

FIG. 1 is a side view of an apparatus for cutting an elongated sheet-like object having elasticity according to an embodiment of the present invention.

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

FIG. 3 is an exploded perspective view illustrating a state of connection between a tension member and a forked plate in the cutting apparatus of FIG. 1;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cutting apparatus 14 Sheet-shaped long object 15 Holding means (holding part) 44 Cutting part (cutting means) 58 Push-up bar (support base)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-290701 (JP, A) JP-A-4-279229 (JP, A) JP-A-59-148295 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B26D 7/06

Claims (2)

(57) [Claims] 1. An elongated sheet-like object having elasticity in the vicinity of one end thereof is held by a claw-shaped holding portion, and the sheet-like length is elongated.
While supplying air to the lower surface of the long object, the sheet-like long object is moved together with the holding portion toward the cutting means composed of a traveling cutter , and the other end of the long sheet-like object is directed upward.
Fixed in a curved state by contacting a support base with a curved surface
And cutting the curved portion along the width direction of the long object by the cutting means. The near one end of 2. A sheet long material having elasticity, in a state where the top is held by the claw-shaped holding portion, shea
Conveying means for conveying the sheet-like long object in the longitudinal direction while supplying air to the lower surface of the sheet-like long object, and a sheet-like long sheet conveyed by the conveying means, comprising a curved surface facing upward. A support table in which the other end of the object is in contact with the curved surface, and a tensile force in the longitudinal direction of the long sheet-like object is applied to the curved section in a state where the curved section is sandwiched by the support table. Tensile force applying means, and cutting means for cutting the curved portion to which the tensile force has been applied by the tensile force applying means with a traveling cutter along the width direction of the sheet-shaped long object, For cutting long sheet-like objects having elasticity.