JPH08187694A - Sheet material cutting device - Google Patents

Abstract

PURPOSE: To perform surely cutting a sheet material with a constitution of enhancing rigidity and forming into small size further lightening weight even in the case of enlarging a sectional area of a guide rail to increase its length, by moving a cutter support base of supporting a disk blade to run along inside the guide rail. CONSTITUTION: A sheet material cutting device 11 is arranged orthogonal to advancing direction of a sheet material 1. A base 21 is formed of mold material of, for instance, box-shaped section, to form a groove 21a in the upper center of this base, also to arrange a flat blade 22 having a cutting edge 22a in this groove 21a. A guide rail 12, formed of mold material of, for instance, U-shaped section, is arranged upward the base 21. Further, a cutter support base 31 is formed of a frame 32 of H-shaped section, to arrange horizontal and vertical each roller 24, 25, 26 coming respectively into contact with an internal surface of the guide rail 12, also to arrange a disk blade 41 having a cutting edge in a cutter shaft 42 journalled to the inside center, and this disk blade is brought into press contact with the flat blade 22 by a spring 45. In this way, the cutter support base 31 is smoothly moved, to enable each blade 22, 41 to uniformly come into press contact.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for laterally cutting a wide sheet material such as paper or film by using a disk blade having a cutting edge on its circumference.

[0002]

2. Description of the Related Art As a wide sheet material cutting device mounted on a plotter device or the like capable of outputting to large sheet materials such as A1 and A0 sizes, a disc blade having a cutting edge on the circumference is long. There is often used a so-called roller-type cutting device that cuts a sheet material such as paper or film in the lateral direction by pressing the flat blade. These cutting devices are required to be miniaturized year by year because they are housed in a small space as the plotter device and the like are made smaller and lighter. on the other hand,
Such a cutting device has a problem that the cutting edge of the sheet material is displaced during cutting and the sheet cannot be cut cleanly. Then, a sheet material cutting device and a sheet material pressing mechanism which have improved these are disclosed in JP-A-5-201190, JP-A-5-228893, JP-A-5-86494 and the like.

[0003]

[Problems to be Solved by the Invention] Actual Kaihei 5-86494
The cutting device disclosed in Japanese Patent Publication No. 2 is for running a cutter support base 31 'supporting a disc blade 41' across the outside of a guide rail 12 ', and its cross-sectional shape is shown in FIG. Is also known as an example, but in a cutting device for large-sized sheet materials such as A0 and A1, the guide rail is long because the length of the guide rail is long, and the guide rail cross section is required to increase the rigidity. If the value is increased, the disk blade support must also be increased, which causes a problem that it is difficult to reduce the weight and size. Further, as a device for preventing the cut end of the sheet material from being displaced during cutting, Japanese Patent Laid-Open No. 2011-2011
No. 90 discloses a paper pressing member arranged at a position opposed to a paper support, and the paper pressing member is moved up and down so that the paper pressing member can abut on the paper on the paper support. However, there is a drawback that it is difficult to reduce the size and weight due to its structure.
Further, the one disclosed in Japanese Patent Laid-Open No. 5-228893 cuts the traveling sheet material by moving the sheet material cutting device in synchronization with the conveying speed of the sheet material. No particular consideration was given to miniaturization.

Therefore, in order to solve the above-mentioned problems, the present invention allows the cutter support base to run on the inner surface side of the guide rail so that even if the cross-sectional area of the guide rail is increased, the rigidity thereof is not increased so much. It is an object of the present invention to provide a small and lightweight sheet material cutting device in which a paper pressing mechanism is mounted as necessary and stable and reliable cutting can be performed even when cutting a wide sheet material.

[0005]

In order to achieve the above object, a sheet material cutting device of the present invention comprises a guide rail which is orthogonal to the traveling direction of the sheet material and which is provided facing the base and forms a hollow cross section. A cutter support base that rotatably supports a disc blade having a cutting edge on the circumference, travels on the inner surface of the hollow cross section of the guide rail, and a flat blade fixed to the base and in sliding contact with the disc blade. It is characterized by having.

Further, in order to achieve the above object, the guide rail of the sheet material cutting device of the present invention is substantially U-shaped, and the hollow portion in which the cutter support base travels within a range surrounded by the U-shaped. Is formed of a mold material having a hollow cross section, and is fixed and fixed relative to the base with a space between the lower surface of the guide rail and the upper surface of the base so as to form a sheet material inlet. The cutter support that runs on the inside is
A frame that axially supports the disc blade and a plurality of rollers that rotate by slidingly contacting inner side surfaces of at least three sides of the guide rail to the frame are provided.

Further, according to the sheet material cutting apparatus of the present invention, the sheet material pressing member is separated from the sheet material surface when the cutter support base is positioned at one end side of the guide rail to stand by for cutting, if necessary, and the cutter support is provided. A sheet material pressing means may be provided in the vicinity of the sheet material outlet for pressing and holding the sheet material surface at the cut end of the sheet material when the table travels on the guide rail and starts cutting the sheet material. it can.

In order to achieve the above object, the sheet material pressing means is provided on the cutter support base at an edge for pressing the sheet material at a lateral side portion thereof and at one or both ends in a longitudinal direction thereof. An elongated pressing member having a protrusion that abuts against the contact plate, and a bearing that axially supports both ends of the pressing member,
Urging means for urging the edge to rotate the sheet material is provided, and when the cutter support base is at a standby position before cutting, the contact plate provided on the cutter support base is the protrusion. When the cutter support base is moved by starting the cutting by rotating the edge of the pressing member in a direction away from the sheet material by abutting against the portion, the contact between the protrusion and the contact plate is released and the edge is removed. It is preferable that the urging means rotates the sheet material in a pressing direction, and that the guide rail, the base and the sheet material pressing means are integrally assembled and molded for further weight reduction. .

[0009]

The basic structure of the sheet material cutting device of the present invention is a device for cutting a sheet material by sliding a disc blade axially supported by a cutter support table into contact with a flat blade fixed to a base. In the present invention, since the cutter support is slidably moved on the inner surface of the guide rail having a hollow cross section, the guide rail is provided in comparison with the conventional sheet material cutting device which travels by straddling the cutter support on the outer side of the guide rail. Even if the cross-sectional area is relatively large, the rigidity of the guide rail when cutting a large-sized sheet material can be increased and the device can be downsized without taking up so much space.

A guide rail made of a material having a hollow U-shaped cross section is fixed to the base so as to form a sheet material inlet between the upper surface of the base and at least the guide rail. Mounting a plurality of rollers that rotate in sliding contact with the inner side surfaces of the three sides on the frame of the cutter support table that supports the disc blade, and run the cutter support table on the inner surface of the guide rail to reduce the size and weight of the cutting device. The purpose of is further achieved.

Further, in the sheet material cutting device of the present invention, if necessary, the sheet material pressing means is provided in the vicinity of the sheet material discharge port, and the sheet material is cut while the cutting edge of the sheet material is held down during cutting. The sheet material can be cut neatly without the material cutting edge shifting. As the sheet material pressing means, an elongated pressing member that presses the sheet material with its widthwise edge is used. When the cutter support table is in the standby position before cutting, the contact plate provided on the cutter support table is brought into contact with the protrusion of the pressing member so that the edge of the pressing member is separated from the sheet material. When cutting is started and the cutter support is moved, the contact between the protrusion and the contact plate is released, and the pressing member is rotated by the urging force so that its edge presses the cut end of the sheet material. As a result, the sheet material can travel freely in the standby state for cutting, and the cut end of the sheet material does not shift during cutting.

Further, the sheet material cutting device of the present invention can be further reduced in weight and size by integrally assembling and molding the guide rail, the base and the sheet material pressing means.

[0013]

The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 is a perspective view showing a first embodiment of a sheet material cutting apparatus of the present invention, FIG. 2 is a perspective view showing a cutter support base of the first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. It is sectional drawing which shows a cutter support base, a guide rail, and a base.
FIG. 4 is a cross-sectional view showing a second embodiment of the sheet material cutting device of the present invention, mainly showing an example of a disc blade support base and sheet material pressing means, and FIG. 5 is a second embodiment of the present invention. FIG. 5 is a perspective view of the embodiment, in which a device for forcibly rotating the disc blade is shown without showing the sheet material pressing means shown in FIG. 4.
FIG. 6 is a perspective view of an example of the sheet material pressing means showing a state in which the cutter support is in the standby position and the sheet material pressing member is separated from the sheet material. FIG. It is a perspective view of an example of a sheet material pressing means showing a pressed state. FIG. 8 is a sectional view showing a guide rail and a cutter support base of a conventional sheet material cutting device.

As shown in FIG. 1, the sheet material cutting device 11 of the present invention is arranged orthogonal to the traveling direction of the sheet material 1 discharged from a plotter (not shown) or the like, and the sheet material 1 to be cut is not shown. Unwinding roll 2 provided on plotter, etc.
After being drawn by a plotter or the like, the sheet is introduced into the sheet material entrance 3 of the cutting device 11 shown in FIG. 3, passes through the cutting device 11, and is discharged from the discharge port 4. Sheet material cutting device 1
1 is usually incorporated in the plotter body or separately installed behind the plotter.

First, the first aspect of the present invention will be described with reference to FIGS. 1, 2 and 3.
An example will be described. The base 21 is made of a box-shaped cross-section material having a length slightly longer than the width of the sheet material to be cut, and a groove 21a is provided substantially in the center of the upper portion thereof, and a flat blade 22a having a cutting edge 22a slightly longer than the width of the sheet material is provided in the groove 21a. The blade 22 is attached. The base 21 does not necessarily have to have a box-shaped cross section, but may have any shape as long as it has a sheet material receiving surface and a flat blade attachment portion, and can be manufactured by an extrusion molding material, a plate material welding structure, or any other manufacturing method. The guide rail 12 is made of a mold material whose length is slightly longer than the width of the sheet material and which has a substantially U-shaped cross section and has a hollow cross section surrounded by the U shape. It is manufactured by various manufacturing methods. Then, the base 2 is formed so that a gap is formed between the lower surface and the upper surface of the base 21 of the entrance 3 through which the sheet material passes.
1 are arranged parallel to each other, and both ends thereof are fixed to the base 21 by the pillar portions 13. Inside the pillar portion 13, a traveling means (not shown) for traveling the cutter support base 31 left and right within the guide rail 12 to cut the sheet material is provided.

Next, the cutter support base 31 of the first embodiment will be described in detail with reference to FIGS. In these figures, the cutter support base 31 is composed of a frame 32 having a cross-section that is slightly smaller than the cross-section inner width of the guide rail 12 and approximates to an H-shape. Horizontal roller 24, upper roller 25, lower roller 2
6 is provided. The lateral roller 24 is inside the left side wall 12a of the cross section of the guide rail 12 in FIG. 3, the upper roller 25 is inside the upper side wall 12b, and the lower roller 26 is the lower side wall 1 thereof.
The outer circumferences of the inner surfaces of 2d are in contact with each other and are rotatably supported.

A cutter shaft 42 is rotatably supported at a substantially central portion of the inside of the frame 32. A disk blade 41 having a cutting edge on the outer circumference is fitted and fixed to the cutter shaft 42, and a spring 45 is provided.
Thus, the outer peripheral cutting edge of the disc blade 41 is urged so as to come into pressure contact with the cutting edge of the flat blade 22. In the second embodiment to be described later, the disc blade 41 is provided with a rotary drive device for imparting a rotational force, but the disc blade 41 is pressed against the flat blade 22 and moves naturally when the disc blade 41 moves. Therefore, in the first embodiment, a device for forcibly rotating the disc blade 41 is not provided.

Next, the cutter support base 131 of the second embodiment will be described in detail with reference to FIGS. In the figure, the same symbols are used for the same parts as in the first embodiment. The cutter support base 131 is composed of a box-shaped frame 132 having a cross section slightly smaller than the inside of the cross section of the guide rail 12, shafts 33 are provided at the six corners shown in the drawing, and a spherical roller 34 is rotatably supported on the shafts. . The shaft 33 is provided so as to form 45 degrees with respect to the corner angle of the guide rail 12,
The spherical surface of each of the two spherical rollers 34 corresponds to the respective corner angle of the guide rail 12 and the inner side walls 12a and 12a.
b, 12b and 12c, and 12c and 12d. Cutter support 1
In order to counteract the force in which the whole 31 is rotated in the clockwise direction in FIG. 4 by the force applied to the tip of the disc blade 41, the angle at which the inner side walls 12c and 12d of the guide rail 12 intersect is slightly more than a right angle as shown in the figure. It is good to keep it at an acute angle.

The lower part of the frame 132 is provided with an opening 132a so that the disc blade 41 and the roller 51 can be seen downward. The cutter shaft 42 is axially fixed to the through holes provided at the substantially central portions of both side surfaces of the frame 132, and the boss 43a of the cutter gear 43 in which the disc blade 41 is fitted inside the frame 132 of the cutter shaft 42 rotates and slides. It is rotatably supported. The disc blade 41 and the boss 43a are prevented from rotating by a key 43b, and are biased via a washer 44 and a spring 45 so that the cutting edge of the disc blade 41 comes into pressure contact with the cutting edge of the flat blade 22. A roller shaft 51 is planted in the frame 132, and the roller 52 is rotatably supported by the roller shaft 51.
A roller gear 53 integrated with 2 drives a gear 43 via an intermediate gear 54 to rotate the disc blade 41 in the same direction as the roller 52. When the cutter support base 31 travels on the inner surface of the guide rail 12, the roller 52 is
The outer periphery of the guide rail 12 contacts the lower inner surface of the guide rail 12 to rotate, and this device is an example of a device for forcibly rotating a disc blade. A contact plate 36 is provided at one end of the side surface of the frame 132 so as to come into contact with a protrusion 63 of a pressing member 61, which will be described later. The disc blade does not necessarily need to be forcedly rotated because it naturally generates a rotational force when it reciprocates while being pressed against a flat blade, but a device for forcedly rotating it may be attached for smoother cutting. The device shown in the second embodiment is only an example, and various other devices are known. Therefore, these devices are appropriately selected and attached according to the situation.

Next, the sheet material pressing means 60 of the second embodiment.
This will be described with reference to FIGS. 4, 6 and 7. Various sheet material cutting devices may be provided with sheet material pressing means as necessary so as to prevent the sheet material from slipping off or being torn. An example of this sheet material pressing means will be explained by mounting it on the second embodiment of the present invention, but it can also be mounted on the first embodiment of the present invention. Sheet material pressing means 60
Is composed of a pressing member 61 and a torsion spring 65 that urges the edge 61a of the pressing member 61 to rotate in the direction of pressing the sheet material. It is provided in. The pressing member 61 has a rod shape with an L-shaped cross section having a length substantially equal to the width of the sheet material. It is supported. Holding member 61
One of the widths of the L-shaped cross section of FIG.
Is urged to rotate in the direction of pressing the sheet material. The other width portion of the L-shaped cross section is provided with cutout portions 61b which are cut out except for both ends to reduce the weight.
Is provided with a protrusion 63.

The operation status of the first embodiment of the present invention will be described below. When a cutting command is issued to the sheet material cutting device, a driving force is transmitted from a driving source (not shown), the cutter support base 31 reciprocates, and the sheet material is cut. Since the horizontal roller 24, the upper roller 25, and the lower roller 26 of the cutter support stand rotate in contact with the inner surface of the guide rail 12, the cutter support can smoothly reciprocate and maintain its posture to maintain the disc blade and the flat blade. There is no variation in the pressure contact force of. Since the cutter support table runs inside the guide rail, there is no concern that the cutter support table may come into contact with a component for transmitting the driving force, for example, an electric wire or the like to be caught.

Next, the operation of the second embodiment of the sheet material cutting device of the present invention will be described with reference to FIGS. The basic operation is the same for the cutter support bases of the first and second embodiments. Before cutting the sheet material, as shown in FIG. 6, the cutter support base 31 is on the right end side of the guide rail 12, and the contact plate 36 of the cutter support base 31 abuts the protrusion 63 of the presser member 61, so that the presser member is pressed. 61 rotates counterclockwise against the urging force of the spring 65, and its edge 61a is located away from the sheet material as shown by the broken line in FIG. 4, and in this state the sheet material to be cut is free. You can pass to.

When the discharge of the sheet material is stopped and a cutting signal is sent, the cutter support base 31 is moved by a traveling means (not shown).
Runs to the left in FIG. 6 and becomes the state of FIG. That is, when the cutter support base 31 travels, the contact plate 36 of the cutter support base 31 comes to the position of the notch 61b of the pressing member 61, and the contact plate 36 is disengaged from the protrusion 63 of the pressing member 61. As a result, the pressing member 61 is rotated clockwise by the urging force of the spring 65, and its edge 61a presses the sheet material as shown by the solid line in FIG.

On the other hand, when the cutter support base 31 travels, the drive roller 5 which is in contact with the lower inside of the guide rail 12 is in contact.
2 rotates to rotate the disc blade 41 in the same direction as the driving roller 52 via the roller gear 53, the intermediate gear 54 and the cutter gear 43. As a result, while the cutting edge of the cut sheet material is being pressed by the pressing member 61, the circumferential cutting edge of the disc blade 41 runs in the cutting direction while rotating in the direction of cutting into the cut sheet material and cuts the sheet material. The sheet material is cut cleanly without the edges shifting. In the first embodiment, the sheet material pressing means and the rotary driving mechanism for the disc blade are not shown, but either one or both of them may be provided.

The case where the cutter support base 31 travels from the right end to the left of FIG. 5 and is cut has been described above, but the protrusions 63 are provided at both ends of the pressing member 61 to complete the cutting of the cutter support base 31 and the left end. If the pressing plate 61 releases the pressing of the sheet material as described above when the vehicle is positioned at, and the sheet material is pressed when traveling to the right again, the cutting of the sheet material can be performed by the same operation by the reciprocation of the cutter support base 31. it can.

According to the above structure, since the cutter support base 31 travels inside the hollow cross section of the guide rail 12, the cutter support base travels over the outside of the guide rail, compared with the conventional cutting device. Even with the same size, the cross-sectional area of the guide rail 12 can be made large, and particularly in the case of a wide sheet material cutting device, the rigidity of the guide rail can be increased,
It is advantageous to make the whole compact. Further, by incorporating the sheet material pressing means in the sheet material discharge port as in the present embodiment, it is possible to prevent the deviation of the cutting edge when cutting the sheet material and to cut it neatly with a small device.

[0027]

As described above, in the sheet material cutting device of the present invention, the disc blade supported by the cutter support and traveling on the guide rail and the flat blade fixed to the base are brought into sliding contact with each other to form the sheet. In a cutting device that cuts material, the cutter support that supports the disc blade runs on the inner surface of the guide rail that forms a hollow cross section, so the conventional cutting that the cutter support runs across the outside of the guide rail. The cross-sectional area of the guide rail 12 can be made larger than that of the device. Therefore, when the guide rail is long as in a cutting machine for wide sheet materials such as A0 and A1 sizes, the rigidity can be increased and the size can be reduced as a whole.

Further, by incorporating a sheet material pressing means in the vicinity of the sheet material discharge port, the cutting edge is prevented from shifting at the time of cutting, and the disc blade cuts while rotating in the direction in which the cutting sheet material bites, so that it is cut cleanly. it can. Further, the guide rail, the base, and the sheet material pressing means are integrally formed and molded, whereby the size can be further reduced. In addition, the effect of eliminating the problem of the cutter support table coming into contact with other parts such as electric wires can also be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a sheet material cutting device of the present invention.

FIG. 2 is a perspective view showing a cutter support base according to the first embodiment of the present invention.

FIG. 3 is a sectional view showing a cutter support base, a guide rail and a base according to the first embodiment of the present invention.

FIG. 4 is a sectional view showing a second embodiment of the sheet material cutting device of the present invention.

5 is a perspective view of a second embodiment of the present invention, and is a view showing a device for forcibly rotating a disc blade without showing the sheet material pressing means shown in FIG.

FIG. 6 is a perspective view showing a state in which the sheet material pressing member attached to the second embodiment of the sheet material cutting device of the present invention is separated from the sheet material.

FIG. 7 is a perspective view showing a state in which a sheet material pressing member attached to the second embodiment of the sheet material cutting device of the present invention presses the sheet material.

FIG. 8 is a view showing a cross section of a guide rail and a cutter support base of a conventional sheet material cutting device.

[Explanation of symbols]

 1 sheet material 2 sheet material unwinder 3 sheet material inlet 4 sheet material discharge port 11 sheet material cutting device 12 guide rail 13 pillar portion 21 base 22 flat blade 24 horizontal roller 25 upper roller 26 lower roller 31 cutter support 32 frame 33 Shaft 34 Spherical Roller 36 Plate 41 Disc Blade 42 Cutter Shaft 43 Cutter Gear 44 Seat Glass 45 Spring 51 Roller Shaft 52 Drive Roller 53 Roller Gear 54 Intermediate Gear 60 Sheet Material Pressing Means 61 Shaft Member 62 Shaft 63 Protrusion 64 Bearing 65 Torsion Spring 131 Cutter Support of Second Embodiment 132 Frame of Cutter Support of Second Embodiment

Claims (5)

[Claims] 1. A guide rail which is orthogonal to a traveling direction of a sheet material and is opposed to a base and which forms a hollow cross section, and a disc blade having a cutting edge on a circumference thereof are rotatably supported by the guide rail. A sheet material cutting device, comprising: a cutter supporting base that travels on an inner surface of a hollow cross section of a rail; and a flat blade that is fixed to the base and is in sliding contact with the disc blade. 2. When the cutter support is positioned at one end side of the guide rail and stands by for cutting, the sheet material pressing member separates from the sheet surface, and the cutter support runs on the guide rail to start cutting the sheet material. 2. The sheet material according to claim 1, wherein the sheet material pressing member is provided with sheet material pressing means for pressing and holding the sheet material surface at the cut end of the sheet material in the vicinity of the sheet material discharge port. Cutting device. 3. The guide rail is made of a material having a generally U-shaped hollow cross section, and is provided on the base with a space between the lower surface of the guide rail and the upper surface of the base so as to form a sheet material introduction port. The cutter supporting base fixedly fixed to each other and running on the inner surface of the guide rail is rotated by slidingly contacting the frame supporting the disc blade and the inner side surfaces of at least three sides of the guide rail. The sheet material cutting device according to claim 1, comprising a plurality of rollers. 4. The sheet material pressing means has an edge for pressing the sheet material on a side portion in a width direction thereof, and a projection portion abutting against a contact plate provided on a cutter support base at one or both ends in a length direction thereof. An elongated pressing member having: a bearing that axially supports both ends of the pressing member; and an urging unit that urges the edge to rotate in a direction to press the sheet material, and the cutter support base is cut. When in the previous standby position, the contact plate provided on the cutter support base contacts the protrusion to rotate the edge of the pressing member in a direction away from the sheet material, and starts cutting to cut the cutter. 3. The support according to claim 2, wherein when the support base moves, the contact between the protrusion and the contact plate is released, and the edge rotates in a direction of pressing the sheet material by the urging means. Sheet material cutting device. 5. The sheet material cutting device according to claim 1, wherein the guide rail, the base, and the sheet material pressing means are integrally formed by molding.