JP2005074571A - Sheet material cutting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material cutting apparatus improving the position accuracy of a movable cutting edge and a fixed cutting edge and securing stable cutting performance by solving a problem of having difficulty in accurately uniting the fixed cutting edge and the movable cutting edge causing a cutting fault in the sheet material cutting apparatus in which a fixed cutting edge member and a movable cutting edge member are unitable and separable. <P>SOLUTION: In this sheet material cutting apparatus, the movable cutting edge member provided with the plate-like movable cutting edge, a driving part for sliding the movable cutting edge in a cutting operation direction with respect to the fixed cutting edge, and a frame for supporting them, and the fixed cutting edge member for supporting the fixed cutting edge, are arranged in a unitable/separable manner, and the movable cutting edge is brought into intersecting pressure contact with the fixed cutting edge in the united position and slid to cut the sheet material. The width direction end part of the movable cutting edge member is provided with a guide for regulating the width direction position of the movable cutting edge and the pressure contact direction position to the fixed cutting edge. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slide-type sheet material cutting device used for a printer, a recording device, and the like.

As a sheet material cutting device used for printers, recording devices, etc., many slide-type sheet material cutting devices are used which cut by moving a movable blade having a V-shaped recessed edge on a fixed blade with a straight edge. Has been. In the sheet material cutting apparatus of this system, the movable blade needs to be held so that the movable blade crosses the fixed blade almost evenly from both ends in the width direction and the movable blade does not fall off the frame.
As a means for maintaining the posture of the movable blade and preventing it from falling off the frame, a guide member for holding both sides of the movable blade is provided as in JP-A-9-155788 (Patent Document 1) to maintain the posture. In addition, the frame is sandwiched between the movable blade and the washer with the spacer inserted in the long hole of the frame, and screwed with the screw and nut inserted in the through hole of the movable blade, and the washer, spacer, and movable blade are integrated. There are a fixing method and a method of inserting a slider into a frame long hole and sandwiching it with a movable blade and a screw as disclosed in JP-A-2002-254386 (Patent Document 2).

In addition, parts such as a motor and a gear for driving the movable blade are as shown in FIG. 3 of Japanese Patent Laid-Open No. 2001-54892 (Patent Document 3) and Japanese Patent Laid-Open No. 11-42589 (Patent Document 4) of FIG. After being placed on a member different from the frame, it is combined with the frame and stored in the frame together with parts such as a movable blade as disclosed in Japanese Patent Application Laid-Open No. 11-347986 (Patent Document 5). The method of doing is common.
A movable blade member comprising a plate-shaped movable blade and a drive unit that slides the movable blade in the cutting operation direction with respect to the fixed blade, and a frame that supports these, and a fixed blade member that supports the fixed blade, A sheet material cutting device which is arranged so as to be separable and which cuts a sheet material by cross-contacting and sliding the movable blade against the fixed blade at the merged position is disclosed in Japanese Patent Laid-Open Nos. 2001-347485 and 2000-052291. It is introduced in the gazette (patent document 7) etc. In the case of a structure that does not separate, it is necessary to pass the sheet material through a paper passing window provided between the fixed blade and the movable blade when setting the sheet material in the printer, but the height of the window is as narrow as about 2 mm. There was an inconvenience that it was difficult to pass the sheet material. After the fixed blade member and the movable blade member are separated by the separation structure, the sheet material is set, and the fixed blade member is combined again to complete the setting. Therefore, it is not necessary to pass the paper through a narrow gap, and the workability is improved. In addition, by making the movable blade into a plate shape, it can be easily formed by pressing, and the thickness of the movable blade member can also be reduced, thus reducing costs and downsizing. There is also an effect of becoming.

JP-A-9-155788 JP 2002-254386 A JP 2001-54892 A Japanese Patent Laid-Open No. 11-42589 Japanese Patent Laid-Open No. 11-347986 JP 2001-347485 A Japanese Unexamined Patent Publication No. 2000-052291

In the sheet material cutting device in which the fixed blade member and the movable blade member can be separated and combined, it is difficult to accurately combine the fixed blade and the movable blade, which causes a cutting defect.
For example, Patent Document 7 describes a structure in which a fixed blade member and a movable blade member are separated, but the movable blade is held by pressing one end of the movable blade against a shaft provided on the frame with a coil spring. In such a method, since the movable blade is in a cantilever state, the position of the blade edge is not stable, and it is difficult to ensure the positional accuracy with the fixed blade.
The objective of this invention is providing the sheet | seat material cutting device which can improve the positional accuracy of a movable blade and a fixed blade, and can ensure the stable cutting performance.

  In order to achieve the above object, the present invention provides a movable blade member comprising a plate-shaped movable blade, a drive unit that slides the movable blade in the cutting operation direction with respect to the fixed blade, and a frame that supports them. The fixed blade member that supports the fixed blade is arranged so as to be separable, and is a sheet material cutting device that cuts the sheet material by cross-contacting and sliding the movable blade against the fixed blade at the combined position, the movable blade The sheet material cutting device is provided with a guide for restricting the width direction position of the movable blade and the pressure contact direction position to the fixed blade at the end portion in the width direction of the member.

  The movable blade preferably has a cutting edge line that is recessed in a V shape.

  In addition, it is desirable that both ends of the movable blade in the cutting operation direction protrude and bend in a direction opposite to the pressure contact direction with the fixed blade.

  Further, it is desirable that the movable blade member has a movable blade receiving portion that receives a pressure contact force received from the fixed blade through the movable blade.

  In addition, it is desirable that the fixed blade member be warped in advance in the cutting width direction and in the direction of pressure contact with the movable blade.

  According to the present invention, since the guide for regulating the width direction position of the movable blade is provided at the width direction end of the movable blade member, the movable blade is inclined, the cutting angle is changed, or the pressure contact force is reduced. It is less likely to cause cutting defects due to changes. In addition, since a guide for regulating the position in the pressure contact direction to the fixed blade is also provided, it is possible to keep the positional accuracy of the two members constant when the separated fixed blade member is combined with the movable blade member again, It is possible to keep the intersection between the movable blade and the fixed blade and the pressure contact state constant.

An important feature of the present invention is that a guide for regulating the width direction position of the movable blade and the pressure contact direction position to the fixed blade is provided at the end portion in the width direction of the combined movable blade member described above.
In the sheet material cutting device of the present invention that can be combined and separated, it is important to accurately combine the movable blade and the fixed blade. For that purpose, it is important to improve the position accuracy of the movable blade as much as possible. Therefore, the position in the width direction is regulated to prevent the movable blade from moving in the cutting direction so as to be inclined and the shear angle is reduced so that cutting cannot be performed, and the fixed blade member and the movable blade member are combined. In order to stabilize the position in the thickness direction in the state, the movable blade edge surely intersects the fixed blade edge, and starts the pressure contact, the position in the pressure contact direction to the fixed blade is regulated.
The guide of the present invention can be configured by a separate member, but for example, a frame having a substantially U-shaped frame bent at both ends in the width direction and having a width substantially the same as the movable blade is used. It is possible to adopt a method of restricting the position corresponding to the bottom of the U-shape and regulating the position in the pressure contact direction to the fixed blade at the position where the U-shape is bent.
Such a frame may be a metal material, but a resin may be used for ease of molding.

  In the present invention, it is desirable that the movable blade has a cutting edge line recessed in a V shape. The reason is, for example, a guillotine-type movable blade, that is, a sheet having a structure in which cutting starts by crossing and pressing with a fixed blade from one side in the width direction of the movable blade, passing through the central portion, and ending cutting on the opposite side In the cutting device, the cutting edge on the cutting start side of the movable blade is close to the fixed blade, and the cutting edge on the cutting end side is far from the fixed blade, so that the shape of the movable blade is not symmetrical with respect to the center. Therefore, the positional relationship between the guide provided on the frame and the cutting position is not symmetrical, and it is difficult to keep the pressure contact force constant. On the other hand, in the case of a movable blade having a V-shaped recessed cutting edge line, the V-shaped cutting edge of the movable blade and the straight cutting edge of the fixed blade are in contact with each other at two nearly symmetrical positions around the vertex of the V-shape of the movable blade. For this reason, the relationship with the guide cutting position provided on the frame is always left and right, and it is easy to maintain the posture of the movable blade and the pressure contact force in an appropriate state.

  In this case, it is desirable that both ends of the movable blade in the cutting operation direction protrude and bend in a direction opposite to the pressure contact direction with the fixed blade. The reason is that, in the case of a sheet cutting apparatus in which the fixed blade member and the movable blade member can be separated, an error occurs in the positions of the two members in the combined state due to the mounting accuracy, the fitting accuracy, and the like. This error is in the range of about plus or minus 0.3 mm from experience, but if both ends of the cutting direction of the movable blade protrude and are bent in the opposite direction of the pressure contact with the fixed blade, the position of the two members Even when deviating from the design value, the fixed blade and the movable blade do not collide with each other at the end faces and the cutting edges do not cross each other. This is because it becomes possible. More preferably, it is not a V-shaped bend, but a smooth R shape is formed, and the fixed blade edge is brought into contact with the fixed blade edge at the R-shaped portion, and then the movable blade edge and the fixed blade edge intersect each other.

  Moreover, it is desirable that the movable blade member has a movable blade receiving portion that receives the pressure contact force received from the fixed blade through the movable blade. The reason is that the movable blade loses the pressure contact force from the fixed blade and moves away from the fixed blade, so that it can prevent the trouble that the cutting position changes or the pressure cannot be cut due to insufficient pressure contact force. is there.

  Further, it is desirable that the fixed blade member be warped in advance in the cutting width direction and in the pressure contact direction to the movable blade. The reason is that by forming a warp, the movable blade and the fixed blade always cut at an intersection angle (the angle formed by the two blade tips projected on the paper plane) from the start to the end of cutting. This is because even when the blade is worn, the sharpness is maintained and a good cutting can be performed.

The present invention will be described in detail by way of specific examples. FIG. 1 is an example showing an embodiment of the present invention and is a diagram showing a positional relationship among a movable blade, a fixed blade, and a frame.
The movable blade 20 is arranged in the positional relationship shown in FIG. 1 in order to cut the sheet material by cross-sliding the fixed blade 10 and its blade edges. The state of FIG. 1 is a state before cutting the sheet material, that is, a state in which the sheet material is prepared to be inserted into the sheet material cutting device. A sheet material (not shown) is inserted into the gap between the cutting edge 21 recessed in a V-shape of the movable blade and the cutting edge 11 of the fixed blade in the depth direction from the front direction in FIG. When the movable blade 20 moves downward while the sheet material is inserted, the V-shaped blade edge 21 is sequentially engaged with the blade edge 11 of the fixed blade from both sides to cut the sheet material from both sides toward the center.
The frame 30 is formed by bending a cold-rolled steel plate having a thickness of 1 mm, and guides 31a and 31b for restricting the position of the movable blade in the width direction are fixed to both sides of the movable blade 20 in order to hold the movable blade 20. Guides 32a and 32b for regulating the position in the pressure contact direction to the blade are provided. The guides 31a and 31b that regulate the position in the width direction of the movable blade are guide surfaces for moving up and down while sliding the side surfaces of the movable blade 20 on the inner surface. Further, the guides 32 a and 32 b that regulate the position in the pressure contact direction with the fixed blade are held so that both side surfaces of the movable blade 20 are not detached from the frame 30.

  FIG. 8 shows a sheet material cutting device disclosed in Patent Document 4. The movable blade 20 is fastened by a threaded pin 100, a nut 110, and a washer 120 so as to be integrated with the slider 90 at a central portion. It is held in a state where it can move up and down while sliding with a long hole 34 provided at the center of 30. In the process of cutting the sheet material, it is desirable that the movable blade 20 operates accurately in a direction perpendicular to the cutting edge line of the fixed blade 10, but in this method, the posture of the movable blade 20 is the length of the slider 90 and the length of the frame. The gap with the hole 34 is affected several times and is likely to be inclined. When the movable blade is tilted in the process of moving in the cutting direction, the shear angle is reduced and cutting may not be stable. On the other hand, in the present invention, as shown in FIG. 1, the side surfaces on both sides of the movable blade can be approximately the same size as the height direction of the frame 30. The gaps between the guides 31a and 31b for regulating the angle directly become the inclination of the movable blade 20, and the accuracy with which the movable blade operates is stabilized several times as compared with the conventional method.

Further, the guides 32a and 32b for regulating the position in the pressure contact direction with the fixed blade stabilize the position in the thickness direction in a state where the fixed blade member and the movable blade member are combined, and the movable blade edge can be securely connected to the fixed blade edge. Since the crossing and the pressure welding can be started, the position in the pressure welding direction to the fixed blade can be regulated.
As described above, according to the present invention, conventionally, the movable blade 20 does not require the slider 90 or the parts such as the pin 100 to be integrated with the slider 90, and can be held only by the frame 30. The posture can also be stabilized.

  In the above specific example, the frame 30 is shown by bending a sheet metal such as a cold rolled steel plate. If it is a sheet metal, the guide 31 that regulates the position in the width direction of the movable blade and the guide 32 that regulates the position in the pressure contact direction to the fixed blade, which are essential points of the present invention, can be integrally formed with one component, so the accuracy is good. Further, the cost can be reduced. Further, the frame 30 may be a molded product made of resin for ease of molding. However, if it is a sheet metal, the thickness may be about 1 mm, but in the case of resin, since the rigidity is insufficient at 1 mm, the basic thickness is about 1 mm to 2 mm, and it is made into a box shape with ribs provided in necessary portions. It is necessary to ensure rigidity.

FIG. 2 is an example showing a state in which a driving unit is incorporated using a movable blade having a V-shaped cutting edge line according to an embodiment of the present invention. In order to cut the sheet material, it is necessary to move the movable blade 20 in the cutting direction, that is, the vertical direction in FIG. A method for operating the movable blade 20 will be described below.
A motor 70 shown in FIG. 2 is fixed to the frame 30. When a voltage is applied to the motor 70, the worm gear 60 press-fitted into the shaft of the motor 70 rotates, and the worm wheel 50 supported by the frame 30 in a rotatable state rotates. The worm wheel 50 has a drive pin 40 disposed at a predetermined distance from the center, and the drive pin 40 is disposed so as to be movable in the fitting portion 23 provided on the movable blade 20.

When the worm wheel 50 is rotated, the movable blade 20 is moved in the vertical direction by the drive pin 40, and the movable blade 20 cuts the sheet material while pressing the fixed blade 10 and its blade edges together. By attaching the retaining ring 140 to the drive pin 40, the surface in the plate thickness direction of the movable blade 20 serves to prevent the worm wheel 50 from coming off, and therefore it is not necessary to fix the worm wheel 50 at the fulcrum shaft portion.
When the movable blade is moved up and down by such a drive unit, the V-shaped blade edge of the movable blade and the straight blade edge of the fixed blade are in contact with each other at two almost symmetrical points around the vertex of the V-shape of the movable blade. The relationship between the guide cutting position provided on the frame is always left and right, and the posture of the movable blade and the pressure contact force can be maintained in an appropriate state.

  The movable blade 20 shown in FIG. 2 has a shape in which the blade tip 21 is recessed in a V-hour shape, and is provided with a cut portion 22 in the center. If this movable blade 20 is used, the sheet material is sequentially cut from both ends toward the center, and only the center portion is connected. For example, a receipt is issued by a register installed near the entrance of a store. When used in, it can be held at the connected part of the central part so that the receipt does not fly by the wind entering from the entrance. If the connected portion is about 2 mm, the holding force is sufficient, and the receipt can be easily torn off when handed off to the customer.

  FIG. 3 shows a shape having no cut portion in the central portion of the movable blade 20. If this movable blade 20 is used, the sheet material is sequentially cut from both ends toward the center, and can be completely separated at the center portion. As described above, in applications where it is not necessary to leave the central portion of the sheet material connected, for example, in a restaurant ticket vending machine, the meal ticket is completely cut by the sheet material cutting device installed inside the apparatus, and the ticket vending machine It is possible to use it by dropping it on a tray provided below.

  FIG. 9 shows a sheet material cutting device disclosed in Patent Document 4. In this sheet material cutting device, the motor 70, the worm wheel 50, the worm gear 60, and the like are not the frame 30 holding the movable blade, After being arranged in the holder 130 which is a separate part, it is combined with the frame 30. On the other hand, according to the present invention, by attaching the motor 70, the worm wheel 50, etc. to the frame 30, there is no need for a separate member on which the conventional motor etc. are arranged, the structure of the sheet cutting device can be simplified, and the cost is reduced. Is possible.

FIG. 4 is an example of a structure for pressing the cutting edge of the fixed blade 10 against the cutting edge of the movable blade 20.
The fixed blade 10 is held at the cutting edge side by a fixed blade base 12 and held at the lower side by a fixed blade holder 13. The fixed blade base 12 is formed by bending a cold rolled steel plate having a thickness of 0.8 mm, and the fixed blade holder 13 is formed by bending a cold rolled steel plate for spring SUS-CSP having a thickness of 0.25 mm. It was used and a part thereof was bent and raised to form spring parts 14-a, 14-b, 14-c for pressure contact. The fixed blade base 12 and the fixed blade holder 13 were fastened with M2.6 screws 15 and held so that the fixed blade 10 did not fall off. When the fixed blade base and the fixed blade holder are formed of sheet metal, the fixed blade holder is about 0.8 mm to 1.6 mm and the fixed blade base is 0.2 mm to 0 due to the relationship between bending workability and strength. A sheet metal in the range of about 5 mm can be used.

FIG. 5 is a cross-sectional view of FIG. 4 and shows a combination with the movable blade 20 of FIG. The fixed blade holder 13 has a pressing spring portion 14 formed by bending and raising a portion of the fixed blade holder 13 and presses the fixed blade 10 to the left side of the drawing. The fixed blade base 12 has a bent portion at the top thereof. The fixed blade 10 is held so as not to fall off to the left side by the pressure contact force. In addition, you may form the fixed blade base 12 and the fixed blade holder 13 by one component. The press contact force may be a so-called leaf spring such as the fixed blade holder 13, or a coil spring or a torsion coil spring may be incorporated.
It is desirable that both ends 24 in the cutting operation direction of the movable blade 20 of the present invention protrude and be bent in a direction opposite to the pressure contact direction with the fixed blade 10.

For example, the fixed blade member, that is, the member including the fixed blade base 12, the fixed blade holder 13, and the fixed blade holder 13 deviates from the design value with respect to the movable blade member, that is, the member including the frame 30 and the movable blade 20 in FIG. When arranged in the direction, the pressure contact force between the cutting edges becomes low, which causes a problem that cutting cannot be performed. If they are too far apart, the cutting edges may not be in contact with each other. On the other hand, when the fixed blade member is disposed in the direction in which the movable blade member approaches the movable blade member, the pressure contact force between the blade edges increases, the blade edge wear progresses, and the durability decreases. When approaching the extreme, both ends 24 in the cutting operation direction of the movable blade may ride on the end surface of the fixed blade 10 at the start of cutting.
In order to prevent such a phenomenon, it is desirable that both ends 24 in the cutting operation direction of the movable blade 20 protrude and be bent in the direction opposite to the pressure contact direction with the fixed blade 10, that is, in the left direction in FIG. . More preferably, it is not a V-shaped bend, but has a smooth R shape as shown in FIG. 5, so that the movable blade edge and the fixed blade edge intersect each other after contacting the fixed blade edge and riding on the R-shaped portion. Good.

When the fixed blade 10 is pressed to the movable blade side, that is, the left direction in FIG. 5 by the above method, the movable blade 20 moves to the left side. In order to receive the pressure contact force to the left side, a movable blade receiving portion 33 is provided on a part of the frame 30 to receive the pressure contact force received from the fixed blade through the movable blade. This portion is indicated by 33-a and 33-b in FIG. By providing the movable blade receiving portion 33, the movable blade 20 loses the pressure contact force from the fixed blade 10 and moves away from the fixed blade 10, and the cutting position is changed or cutting is impossible due to insufficient pressure contact force. It is because a malfunction can be prevented.
In FIG. 5, the pressure contact force increases when the position of the portion 33 receiving the pressure contact force moves to the right side, that is, approaches the fixed blade edge, and the pressure force decreases when it moves to the left side, that is, away from the fixed blade edge. The pressure contact force between the blade edges requires a higher pressure contact force as the sheet material becomes thicker, but by adjusting the position of the portion 33 that receives the pressure contact force, depending on the required conditions such as thickness and hardness of the sheet material It is possible to apply a pressing force.

Further, it is desirable that the fixed blade 10 is warped in advance in the cutting width direction as shown in FIG. 6 and in the pressure contact direction with respect to the movable blade 20, that is, in the left direction in FIG. The reason is that, from the start to the end of cutting, the movable blade 20 and the fixed blade 10 always cut at the crossing angle 150 shown in FIG. Because you can.
7 is a view of the movable blade 20 and the fixed blade 10 shown in FIG. 6 as viewed from below, but the positional relationship is different from FIG.

  Since the sheet material cutting device of the present invention can maintain high cutting accuracy even if a separation structure is adopted, a printer such as a cash register of a store where the sheet material is frequently replaced, a ticket vending machine, or a ticket issuing machine It is extremely useful as a sheet material cutting device employed in the above.

It is a figure which shows an example which shows the positional relationship of the movable blade of this invention, a fixed blade, and a flame | frame. It is a figure which shows an example of the sheet | seat material cutting device of this invention containing a drive part. It is a figure which shows another example of the sheet | seat material cutting device of this invention containing a drive part. The Example of this invention which shows an example of the structure of a fixed blade. It is a figure which shows an example of sectional drawing of the sheet | seat material cutting device of this invention. It is a figure explaining the curvature of a fixed blade. It is a figure explaining the crossing angle of a fixed blade and a movable blade. The example which shows the holding | maintenance form of the conventional movable blade. It is an example which shows an example of the conventional sheet | seat material cutting device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Fixed blade, 11 Cutting edge, 12 Fixed blade base, 13 Fixed blade holder, 14 Pressure spring, 15 Screw, 20 Movable blade, 21 V-shaped blade edge, 22 Cutting part, 23 Fitting part, 24 Both ends of cutting operation direction , 30 frame, 31 guide for regulating the position in the width direction of the movable blade, 32 guide for regulating the position in the pressure contact direction with the fixed blade, 33 bending portion of the movable blade, 40 driving pin, 50 worm wheel, 60 worm gear, 70 motor, 80 Switch, 90 slider, 100 pins, 110 nut, 120 washer, 130 holder

Claims (5)

A movable blade member comprising a plate-shaped movable blade, a drive unit that slides the movable blade in the cutting operation direction with respect to the fixed blade, and a fixed blade member that supports the fixed blade. A sheet material cutting device which is arranged so as to be separable, and which cuts the sheet material by cross-contacting and sliding the movable blade against the fixed blade at the combined position, and at the end of the movable blade member in the width direction, the movable blade The sheet | seat material cutting device characterized by the above-mentioned. The guide which regulates the width direction position and the press-contact direction position to a fixed blade is provided. The sheet material cutting device according to claim 1, wherein the movable blade has a cutting edge line recessed in a V shape. The sheet material cutting device according to claim 2, wherein both ends of the movable blade in the cutting operation direction protrude and are bent in a direction opposite to the pressure contact direction with the fixed blade. The sheet material cutting device according to claim 1, wherein the movable blade member has a movable blade receiving portion that receives a pressure contact force received from the fixed blade through the movable blade. 5. The sheet material cutting device according to claim 1, wherein the fixed blade member is warped in advance in a cutting width direction and in a pressure contact direction with respect to the movable blade.

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