JPH0966492A - Cutting-off device for a plurality of sheet materials - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain high accuracy in cutting-off even when a plurality of sheet material layers are cut off by providing a cutter restricted on the move in the cutting width direction and a chopping board for supporting a plurality of sheet materials. SOLUTION: A cutter member consisting of a cutter 5 and a bed metal 6 are restricted widthwise on both sides by a holder 7 and a stay 3b, and since a cutter driving body 4 is not fixed to the cutter member, the cutter member maintains a cutting edge substantially parallel to a plurality of sheet materials, while lowering almost vertically. The cutter member lowering vertically contacts substantially vertically a plurality of sheet materials 13 overlapping each other to cut off a plurality of sheet materials 13 by applying a shearing load. The cutting-off force is supported by the chopping board 14 and when all sheet materials 13 are cut off, the cutting edge of the cutter member contacts the chopping board and stops.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material cutting device for cutting thin plate-shaped plastic such as paper or film, and particularly for accurately cutting a sheet material having a plurality of laminated layers such as edge cutting of magazines. It relates to a device capable of

[0002]

2. Description of the Related Art As a sheet material cutting device mounted on a recording device such as a copying machine, a printer or a facsimile,
For example, by using two blades having a width corresponding to the cutting width as described in Japanese Patent Publication No. 50-24466, one of the blades is swiveled to cross-contact the other blade to cut the sheet material. There is a so-called rotary cutting device. Further, by using two blades having a width corresponding to the cutting width as described in Japanese Utility Model Publication No. 58-37594, one blade is moved up and down to press and slide with the other blade to form a sheet material. There is a so-called guillotine type sheet material cutting device for cutting. Since these devices use two blades corresponding to the cutting width, they have an advantage that the sheet material can be quickly cut.

On the other hand, there is also a method of cutting without using the above-mentioned two blades. For example, a knife is used to cut a material such as a cutting board by pressing a sharp blade against the material to be cut (herein referred to as a push-cut type). When the sheet material is cut, such a push-cut method is applied, for example, Japanese Utility Model Publication No. 3-18160 and Japanese Utility Model Publication 1-443.
As described in No. 16 and the like, there is known a device for cutting a blade in a diagonal direction to a sheet material having a plurality of layers. This device can cut laminated sheet materials as they are.

[0004]

In the above-mentioned push-cut type sheet material cutting device, the cutting tool is usually brought closer to the cutting board not in the vertical direction but in an oblique direction to obtain a shear angle at the start of cutting, It is cut by the synergistic effect of friction between the blade and the sheet material. The present inventor has tried to apply the above-mentioned push-cut type sheet material cutting device as a device for cutting a plurality of sheet materials. However, it has been found that in a sheet material cutting device in which a blade is made to approach in an oblique direction, a plurality of layers of sheet material are displaced during cutting, and it is difficult to obtain precision as edge cutting of a plurality of layers. An object of the present invention is to provide a sheet material cutting device capable of maintaining high cutting accuracy even when cutting a plurality of layers of sheet material.

[0005]

DISCLOSURE OF THE INVENTION The inventor of the present invention has studied the above-mentioned push-cut type sheet material cutting device, and is not a sheet material cutting device for contacting a blade member with a sheet material from an oblique direction, but a substantially vertical sheet material cutting device. A study was made to provide a vertical push-cut type multi-sheet material cutting device in which the blade members are brought close to each other from the direction. This is because the vertical push cut does not exert a force in the direction of causing the sheet material to shift, and accurate cutting is possible. That is, the place on which the present invention is based comprises a blade member that is substantially restrained from moving in the cutting width direction, and a cutting board member that supports a plurality of sheet materials. Is a sheet material cutting device that cuts a plurality of sheet materials placed between a blade member and a cutting board member by bringing them close to each other in a substantially vertical direction.

As described above, in the cutting apparatus for a plurality of sheet materials, it is necessary to cut a large number of sheet materials at a time, and if the sheet materials are misaligned during cutting, cutting failure will occur. Therefore, the blade must be brought into contact with the multi-sheet material vertically. In a specific device of the present invention, in order to drive the blade member, while making an arc motion of the link member having one end fixed in the cutting direction,
The arc motion of the link member is converted into the motion in the cutting direction of the blade member by bringing the link member and the blade member into contact with each other without fixing them. By doing so, since the link member that makes an arc motion and the blade member are not fixed, only the displacement of the position of the link member that makes an arc motion can be transmitted to the blade member, and the cutting member is placed substantially perpendicular to the cutting member. It becomes possible.

Further, as described above, in the present invention, a large number of sheets are cut at a time, so that a much larger load is applied to the blade than when a single sheet is cut. In order to face such a load, theoretically an infinitely large blade driving force can be obtained, and a displacement in the vicinity of a position rotated 90 degrees from the top dead center of the link member is transmitted to the blade member. Is desirable. Preferably, the cutting start point is in the range of 60 degrees to less than 90 degrees from the top dead center.

A more specific preferred configuration of the present invention is at least one link member rotatably connected to a support member, a drive device for reciprocally rotating the link member, and a blade driver attached to the link member. , A cutting member that is substantially restrained from moving in the cutting width direction, and a cutting board member that supports a plurality of sheet materials, and the link member and the drive device are reciprocally rotated. With the mounting position of and as the force point and the mounting position of the link member and the supporting member as the fulcrum, while making the blade driving body move in an arc in the cutting direction,
A plurality of sheet materials placed between the cutting tool member and the cutting board member by bringing the cutting tool driving body into contact with the cutting tool member to bring the cutting tool member close to the cutting board member in a direction substantially perpendicular to the cutting board member. It is a sheet material cutting device, which is characterized by cutting.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In a specific configuration of the present invention, a change in the position of a rotating blade driving body is transmitted to a blade member. Without fixing the blade moving body and the blade member,
By contacting the blade member whose movement in the cutting width direction is restricted, the contact position of the blade driving member with the blade member moves due to the arc motion of the blade moving body, and the blade member is moved in the cutting direction. is there. For example, in the sheet material cutting device having the configuration shown in FIG. 1, by reciprocating the drive trunk 1, the link 2a moves in an arc and the link 2a moves.
The blade driving body 4, which is a roller provided in a, moves down on the blade member composed of the blade 5 and the base metal 6 integrated with the blade 5, and pushes down the base metal 5. At this time, the blade member is
Movement in the cutting width direction is restricted by the stay 3b and the holder 7. Therefore, as shown in the side view of FIG. 2, the blade member is substantially perpendicular to the cutting board member 14 and can cut the sheet material 13.

Further, it is desirable that the link members used in the present invention are provided at two locations near both ends in the cutting width direction as shown in FIG. 1, and the link members are rotatably connected by a connecting trunk. . This is one link member,
This is because pressing the blade member becomes unstable. Further, at this time, for example, adjusting bolts 20b and 20C for adjusting the width between the link members as shown in FIG.
It is desirable to provide an adjuster according to. If there are two link members, it may not be possible to move the tool member vertically due to abrasion of one end of the tool member unless the tool member is pushed down simultaneously by the two link members at the same speed. Therefore, it is desirable to adjust the width between the link members with, for example, an adjusting bolt so that the blade members can be simultaneously pushed down at the same speed.

The blade driving body in the present invention may be any one that can slide or rotate on the blade member, and can transmit the displacement of the link member to the blade member.
Preferably, the roller is rotatably attached. In addition, it is desirable that the drive device be provided with an elastic member that buffers the reaction force of the cutting board. In the cutting device for a plurality of sheets of the present invention, uncut uncut sheet material occurs when the operating stroke of the blade member is insufficient, conversely if the operating stroke of the blade is too large, the cutting edge bites into the cutting board member,
Since the load on the drive device increases remarkably, it is ideal to control the operating stroke of the cutting tool so that the maximum operating position of the cutting tool in the cutting direction exactly matches the contact position of the cutting edge and the cutting board.

However, in reality, it is difficult to completely determine the contact position between the cutting edge and the cutting board member by the operation stroke. Therefore, in order to perform the cutting completely, the operating stroke is often set so as to slightly bite into the cutting board member. At this time, if the reaction force from the cutting board member that receives the blade is directly transmitted to the drive source such as the motor, the load of the motor increases rapidly, and problems such as overheating of the motor may occur. Therefore, it is desirable to provide the drive device with an elastic member that buffers the reaction force from the cutting board member.
Specifically, as shown in FIG. 4, a spring 25b may be installed in the drive device to absorb the reaction force from the cutting board by the spring.

As the cutting tool of the present invention, for example, a cutting tool having a straight cutting edge line shown in FIGS. 1 and 2 can be used. A preferable cutting edge angle is 15 to 25 degrees, and a single-edged blade is used for straight cutting. Further, in the present invention, it is desirable to have a pressing plate that moves in the cutting direction following the movement of the blade member and holds down a plurality of sheet materials. By having the pressing plate, it is possible to further suppress the deviation of the plurality of sheet materials during cutting and improve the cutting accuracy. The pressing plate may have an independent drive mechanism, but in order to simplify the structure of the sheet material cutting device, it is desirable to interlock with the operation of the blade member.

For example, as shown in FIG. 6, a force in the cutting direction is applied to the pressing plate 30a in advance by a spring 31a fixed to the stay 3b, and the upper end of the pressing plate 30a is bent to the upper part of the blade member. The spring is released by following the lowering of the blade member,
At the time of contact with the sheet material, the pressing plate can obtain a pressure contact force by the spring. Further, as shown in FIG. 7, it is assumed that the rotary shaft 33 extending in the cutting width direction and the cams 32a and 32b fixed to the rotary shaft are provided on both sides of the rotary shaft in the cutting width direction. It can also be given by 31c and 31b. By providing the cams on both sides in the cutting width direction, it is not necessary to bend and lower the pressing plate to press only one side in the cutting width direction, which is effective in suppressing the displacement of a plurality of sheet materials.

[0015]

【Example】

(Embodiment 1) Hereinafter, the present invention will be described in detail based on embodiments and drawings. FIG. 1 is an assembly conceptual diagram showing an example of a cutting apparatus for a plurality of sheets of the present invention, and FIG. 2 is a side view of the sheet cutting apparatus based on FIG. In FIGS. 1 and 2, when the motor 22 rotates and the rotor 23a rotates, the lever 21a swings with the support shaft 21c as a fulcrum due to the connection between the roller 23b and the elongated hole 21b. Then, the drive trunk 1 connected to the lever 21a is reciprocated in the longitudinal direction. One end of the drive trunk 1 is connected to the link 2a via a bush 12a, which serves as the drive device of the present invention for driving the link 2a.

In the apparatus shown in FIG. 1, the bush 12a is fixed to the link 2a and the lever 21a by bolts 11a, respectively, and the drive trunk 1 to the bush 1 are connected.
The holes at both ends of the drive stem 1 which are loosely fitted in the bush 12a are made smaller than the head of the bolt 11a so that the 2a does not come off. In the apparatus shown in FIG. 1, bushes 12a and 12b are used for the rotatable connecting portions so that the bolts 11a and 11b can be rotated.
I am trying to connect.

A link 2a is rotatably mounted on the stay 3a, which is a supporting member, and the link 2a is
By the reciprocating motion of the drive trunk 1 of the above-mentioned driving device, the reciprocating motion is performed in an arc shape. The link 2a has a blade driver 4
Is installed, and the tool driving body 4 uses the installation point of the link member 2a and the stay 3a as a fulcrum and the installation point of the link member 2a and the drive trunk 1 as a force point by the arc motion of the link 2a.
Moves vertically in an arc. In addition, in FIG. 1, in order to reinforce the link 2a, a link 2c is also provided on the opposite side via the stay 3a and the blade driving body 4.

A linking stem 20 is rotatably connected to the link member 2a so that the link member 2b provided on one end side in the cutting width direction can reciprocate in an arc in synchronization with the link member 2a. The stay 3a in the same manner as the link member 2a.
With the installation point of No. 2 as the fulcrum, and the installation point of the link member 2b and the connecting trunk 1 which is a part of the drive device as the power point, the blade driving body 4 performs a circular arc motion in the vertical direction.

When the blade driving bodies 4 provided on both sides in the cutting width direction move in an arc, the blade members are pushed down while contacting and sliding on the upper surface of the blade member composed of the blade 5 and the base metal 6. The blade member is constrained in the width direction by the holder 7 and the stay 3b on both sides, that is, in the cutting width direction, and the blade driver 4 is not fixed to the blade member. Therefore, the blade member is substantially composed of a plurality of sheet materials. The blade descends almost vertically while maintaining the cutting edge parallel to.

As shown in FIG. 2, the vertically descending blade member is in contact with the stacked sheet materials 13 substantially vertically and cuts the plurality of sheet materials while applying a shear load. To go. The cutting force is fixed to the base 15a with the set screw 15b and is supported by the cutting board member 14 extended to the cutting width or more, and when the sheet material is completely cut, the cutting edge of the cutting tool member comes into contact with the cutting board member 14 and stops. . After that, the reciprocating motion of the drive trunk 1 causes the cutting tool driving body 4 to move upward, sandwiching the collar 8 on the cutting tool member, and bolt 11c.
The blade member is lifted upward by coming into contact with the rail 10 fixed and provided. This completes one cutting operation.

In the apparatus shown in FIG. 1, the blade driver 4
Is a sliding pin that can slide, but as shown in FIG. 3, it may be a roller fitted in the bush 12b so as to make rolling contact with the upper surface of the base metal. Since the wear of the blade driving body 4 directly affects the cutting operation of the blade 5, it is preferable to use a roller with little wear as shown in FIG. 3 in order to prevent cutting failure due to bending of the blade edge due to wear. .

(Embodiment 2) FIG. 4 is an assembly conceptual diagram showing an example in which an elastic member for buffering a reaction force from a cutting board member is incorporated in a driving device of a plural sheet material cutting device of the present invention. The drive device of FIG. 4 has a structure in which when the blade and the cutting board member come into contact with each other and the required operating force of the drive trunk 1 rapidly increases, the spring 25b is compressed and the surplus operation of the lever 21a is absorbed. Is a lever 21a and the lever 21a
The cylindrical portion of the drive trunk 1 is loosely fitted to the knuckle pin 24 whose both ends are rotatably supported by brackets 21d fixed by bolts 11d with a spacer 21e interposed therebetween while being fitted to the support shaft 21c. Between the nut 25c screwed into the tip and the knuck pin 24, both ends are spring-loaded 25
A spring 25b sandwiched by a is provided.

When the motor 22 is activated and the rotor 23a rotates, the lever 21a swings about the support shaft 21c as a fulcrum, and reciprocates the drive trunk 1 in the longitudinal direction via the knuckle pin 24. When the drive trunk 1 is pulled toward you, the blade moves in the cutting direction, and after the blade 5 and the cutting board member 14 come into contact with each other so that the drive trunk 1 cannot be pulled any further, the knuckle pin 25 is pushed through the spring receiver 25a. The spring 25b sandwiched between 24 and the nut 25c contracts to absorb the surplus operation of the lever 21a. In the drive device shown in FIG. 4, it is not necessary to strictly control the dimensions and mounting accuracy of the drive trunk, the link, the lever, etc., which affect the operation stroke of the blade, and the blade and the cutting board come into contact with each other due to wear of the blade and the cutting board member. Even if the operation stroke required for the increase of the stroke is increased, there is also an advantage that it is possible to prevent the shortage of the operation stroke of the blade by only reducing the contraction margin of the spring 25b due to the surplus operation of the lever 21a.

(Embodiment 3) FIG. 5 is a view showing an example in which an adjuster for adjusting the distance between the link members 2a and 2b of the sheet material cutting apparatus of the present invention shown in FIG. 1 is provided. That is, in order to surely cut a plurality of sheet materials over the entire effective cutting width, it is preferable that the cutting tool abuts on the cutting board member in parallel. In consideration of this point, FIG. 5 shows that the cutting tool and the cutting board are parallel to each other. The adjuster function is provided on the connecting trunk so that the degree can be easily adjusted.

Specifically, a connecting trunk for connecting the link 2a and the link 2b is screwed into both ends of an adjust nut 20d having a right-hand thread at one end and a left-hand thread at the other end. The lock nut 20e and the lock nut 20f are fixed to form an adjuster. Adjust nut 2
When 0d is rotated, the distance between the link 2a and the link 2b changes, so that the parallelism with respect to the cutting board of the blade 5 that moves in the cutting direction or the separating direction with the swing of the link 2a and the link 2b is easily adjusted. Is something that can be done.

(Embodiment 4) FIG. 6 is a sectional view showing an example in which a pressing plate for pressing a sheet material during cutting is provided in the cutting apparatus for a plurality of sheet materials of the present invention shown in FIG. In FIG. 6, the pressing plate 3 is slidably supported between the blade 5 and the base metal 6 and the stay 3b in the cutting direction and the separating direction of the blade 5.
0a is stationary by applying a force in the cutting direction from the spring 31a while hooking the bent portion at the upper end to the base metal 6. When the blade 5 descends in the cutting direction together with the base metal 6, the pressing plate 3
0a follows the base metal 6 to the position where the lower end contacts the sheet material 13, and while the blade 5 further descends in the cutting direction to cut the sheet material 13, the pressing plate 30a is pressed by the sheet material 13a.
The vicinity of the cut end is pressed down by the force applied by the spring 31a. The pressing plate 30a prevents the sheet material 13 from being displaced during cutting in the sheet cutting apparatus of this example.
It is possible to keep the cutting position accuracy stable.

(Embodiment 5) FIG. 7 is an assembly conceptual diagram showing an example of a cutting apparatus for a plurality of sheets of the present invention provided with a pressing plate different from that of FIG. In FIG. 7, the pressing plate 30 a slidably supported between the blade 5 and the base metal 6 and the stay 3 b in the cutting direction and the separating direction of the blade 5 includes a rotary shaft 33.
Cams 32a and cams 3 fixed to both ends by bolts 11a
An elongated hole 30b is loosely fitted in the pin 32c of 2b to keep the lower end parallel to the cutting board. A force is exerted in the cutting direction of the blade 5 by the springs 31b and 31c via the cam 32a and the pin 32c of the cam 32b. While being given, the central bent portion is the base metal 6
It is trapped in and is stationary.

When the blade 5 is lowered together with the base metal 6 in the cutting direction, the pressing plate 30a is moved down to follow the base metal 6 to a position where the lower end thereof contacts the sheet material 13, and the blade 5 is further lowered in the cutting direction. While the sheet material is being cut, the pressing plate 30a presses the vicinity of the cut portion of the sheet material with the force applied by the spring 31b and the spring 31c via the cam 32a and the cam 32b. In the device shown in FIG. 7, since both sides of the pressing plate 30a in the cutting width direction are connected by the cams, the lower end of the pressing plate can be kept parallel to the cutting board, and a narrow sheet material can be attached to the end portion of the blade 5. Even when cutting in the vicinity, the pressing plate 30a can uniformly press the surface of the sheet material. Therefore, it is possible to prevent the positional deviation of the sheet material during cutting and to maintain the cutting position accuracy more stably.

[0029]

According to the present invention, it is possible to provide not a sheet material cutting device for contacting a blade member with a sheet material from an oblique direction but a device for performing vertical push-cutting in which a blade member is brought into proximity from a substantially vertical direction. Even when a sheet material having a plurality of layers is cut, the cutting accuracy can be kept high. Therefore, in particular, it is industrially effective as a cutting device that requires high cutting dimensional accuracy such as edge cutting of a book in which a plurality of sheets are stacked.

[Brief description of drawings]

FIG. 1 is an assembly conceptual diagram showing an example of a cutting device for a plurality of sheets of the present invention.

FIG. 2 is a side view of the multi-sheet material cutting device shown in FIG.

FIG. 3 is an assembly conceptual diagram showing another example of the cutting device for a plurality of sheets of the present invention.

FIG. 4 is a diagram showing an example in which an elastic member is provided in a driving device of a cutting device for a plurality of sheets of the present invention.

FIG. 5 is a diagram showing an example in which an adjuster is provided between the link members of the cutting device for a plurality of sheets of the present invention.

FIG. 6 is a view showing an example in which a pressing plate is provided in the multi-sheet cutting device of the present invention.

FIG. 7 is a diagram showing another example in which a pressing plate is provided in the multi-sheet material cutting device of the present invention.

[Explanation of symbols]

1 drive trunk, 2a, 2b, 2c link, 3a, 3b
Stay, 4 blade driver, 5 blade, 6 base metal, 7 holder, 8 collar, 10 rail, 11a, 11b, 1
1c, 11d bolt, 12a, 12b bush, 2
0a, 20b, 20c, 20d Adjust bolt, 2
0e, 20f lock nut, 21a lever, 21b
Slotted hole, 21c support shaft, 21e spacer, 22 motor, 23a rotor, 23b roller, 24 pin, 2
5a spring receiver, 25b spring, 25c nut, 30
a Holding plate, 30b oblong hole, 31a, 31b, 31c
Spring, 32a, 32b cam, 32c pin, 33 rotating shaft

Claims (9)

[Claims] 1. A cutting tool, which is substantially perpendicular to the cutting board member, comprising a cutting tool whose movement in the cutting width direction is substantially restrained, and a cutting board member which supports a plurality of sheet materials. An apparatus for cutting a plurality of sheet materials, which is made to approach from a direction and cuts a plurality of sheet materials placed between a blade member and a cutting board member. 2. At least one link member rotatably connected to the support member, a drive device for reciprocally rotating the link member, a blade driver attached to the link member, and a blade driving member substantially in the cutting width direction. It has a blade member whose movement is constrained and a cutting board member that supports a plurality of sheet materials, and by reciprocally rotating the link member, the attachment position of the link member and the drive device is used as a force point, With the attachment position of the link member and the support member serving as a fulcrum, the blade member is moved in contact with the blade member while moving the blade member in a circular arc in the cutting direction, so that the blade member is substantially moved with respect to the cutting board member. And a cutting device for cutting a plurality of sheet materials placed between a blade member and a cutting board member in a direction perpendicular to the cutting member. 3. A plurality of sheets according to claim 2, wherein the link members are provided at two locations near both ends in the cutting width direction, and the link members are rotatably connected by a connecting trunk. Material cutting device. 4. The cutting device for a plurality of sheets according to claim 2, wherein the blade driving body is a roller rotatably attached to the link member. 5. The cutting device for cutting a plurality of sheets according to claim 2, wherein the drive device is provided with an elastic member for cushioning a reaction force generated by the cutting board. 6. The cutting device for a plurality of sheets according to claim 3, wherein the connecting trunk is provided with an adjuster for adjusting a width between the link members. 7. A plurality of sheets according to claim 2, further comprising a holding plate that moves in the cutting direction following the movement of the blade member to hold down a plurality of sheet materials. Material cutting device. 8. A rotary shaft extending across the cutting width direction and cams fixed to the rotary shaft on both sides of the rotary shaft in the cutting width direction, and both sides of the pressing plate are pressed by the cams. The cutting device for a plurality of sheets according to claim 7. 9. The sheet cutting apparatus according to claim 1, wherein the sheet material to be cut is a stack of a plurality of sheets.