JPH09193082A - Sheet material cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deformation of a roller by arranging rolling members on front and rear wall surfaces of a housing hole to house the roller to rotate a rotary edge, and reducing frictional resistance with the roller. SOLUTION: This device is provided with a tool post 2 movably arranged on a frame so as to cross a sheet material, a rotary edge 1 journalled to this tool post 2, a fixed edge 4 arranged so as to contact with the rotary edge 1 and a rotary mechanism to rotate the rotary edge 1, and the rotary mechanism is constituted of the rotary edge 1 and a roller 11 arranged between the rotary edge 1 and the frame, and is constituted in such a way that when the tool post 2 moves to the frame, the roller 11 rotates, and the rotary edge 1 is rotated in the cutting direction of the sheet material by rotation of this roller 11 while slightly inclining in the advancing direction. The roller 11 is formed as a roller having no rotary shaft, and the roller 11 is rotatably arranged in an almost rectangular housing hole 12 formed in the tool post 2 to support the rotary edge 1.

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 a sheet material by the cooperation of a circular rotary blade that moves while rotating and a long fixed blade.

[0002]

2. Description of the Related Art In a printer such as an ECR or POS terminal, a recording paper wound in a roll is pulled out and printed, and then a required portion is cut using a cutting device and issued as a sheet. ing. There are various types of such recording paper cutting devices. Recently, in order to overcome the drawbacks of the rotary type cutting device which is expensive in manufacturing cost and relatively large in noise, one of the devices for cutting a band-shaped sheet material such as paper is used. First, a cutting device using a combination of a circular rotary blade that moves while rotating and a long fixed blade has come to be used.

A cutting device of this type will be described with reference to FIG. 6. The supporting body 101 having the rotary blade 102 is shown in FIG.
It is screwed to the screw shaft 100 shown in (a) and moves in the left-right direction on the screw shaft. As can be seen from FIG. 6 (b), the rotary blade 102 supports the support 10
It is rotatably supported by a shaft 105 provided on the frame 1, and is pressed by a spring 104 or the like against a fixed blade 103 provided on the frame side. In FIG. 6A, the sheet material transported in the direction perpendicular to the paper surface is the rotary blade 1 when the support body 101 moves in the left-right direction.
02 and the fixed blade 103.

By the way, in such a cutting device, as shown in FIGS. 7 and 8, the rotary blade 102 is slightly inclined with respect to the fixed blade 103 so that the peripheral portion of the rotary blade 102 is located at a point P in front of the moving direction of the rotary blade. It is important to press the edge of the fixed blade 103 by pressing in order to secure the sharpness. For example, Japanese Patent Publication No. 50-24466 is proposed as a rotary blade inclining device, but in this device, a wire that is pulled left and right and a swing lever that swings around a fulcrum shaft are used for rotation. Since it is a configuration that switches the inclination of the blade, the device for switching the rotary blade is complicated,
It had the problem of becoming expensive.

Therefore, the present inventors have already proposed a sheet cutting device described in Japanese Patent Laid-Open No. 5-200694 in order to solve the above conventional problems. FIG. 9 is a plan view of the device, and FIG. 10 is a cross-sectional view of the device. In FIG. 9, a rotary blade 1 is rotatably supported by a shaft on a tool rest 2, and the shaft is loosely attached to the tool rest 2 so that the shaft can be slightly tilted with respect to the tool rest 2. A storage hole 12 formed as shown in FIG. 9 is formed in the tool rest 2, and a roller 11 is arranged in the storage hole 12 so as to be capable of reciprocating in the arrow C direction.

Further, the roller 11 is arranged between the rotary blade 1 and the frame 8 as shown in FIG. 10, and the roller 11 is further rotated by the spring force of the pressing spring 10.
It is pressed against the frame 8 with a proper pressure via. Therefore, when the tool rest 2 starts to move to the left in the figure, the roller 11 rotates by the frictional force with the frame 8 and moves in the storage hole 12 toward the right end until it comes into contact with the wall surface. At this time, the rotary blade 1 is supported at two points P and Q, and the rotary blade 1 receives a momentum constantly pressed by the fixed blade 4 about the support axis PQ, and the rotary blade 1 is always fixed blade. 4 is inclined so as to be pressed by the contact point P with 4. Further, when the tool rest 2 continues to move, the roller 11 rotates due to the frictional force of the frame, and further the rotation of the roller 11 causes the rotary blade 1 to rotate, so that the sheet material between the fixed blade 4 and the fixed blade 4 cooperates well. Can be cut into

When returning, the screw shaft rotates in the opposite direction to the above by a motor (not shown). By this rotation, the tool rest 2 starts moving to the right in the figure, and cuts the sheet material by the same action as described above. At this time, contrary to the above, the rotary blade 1 rotates in the moving direction of the tool rest 2 while maintaining an appropriate inclination with respect to the inclined fixed blade. As another example of the above-mentioned embodiment, a moving piece provided with a storage hole and a roller arranged in the moving piece is also proposed. As described above, in the above-mentioned device, the sheet material can be cut by the rotary blade when the tool rest moves forward or backward on the screw shaft, and it rotates according to the moving direction of the tool rest. Since the blade can be inclined at an appropriate angle with respect to the fixed blade, not only the cutting efficiency of the sheet material is improved, but also a very clean cut surface can be obtained.

[0008]

However, in the sheet material cutting apparatus as described above, as shown in the drawing, the roller 11 is used.
Since the rotary shaft 11a is provided in the housing 11, and the shaft 11a is housed in the bearing portion 13 provided in the housing hole 12, it is necessary to bother to provide the roller 11 with the rotary shaft 11a, and the housing portion 12 is provided with the bearing portion 13. Therefore, there is a problem in that it takes time to process the parts. Further, when a moving piece is used, the number of parts is increased by the amount of the moving piece, which is disadvantageous in terms of cost.

In view of this, the present invention proposes an inexpensive sheet material cutting device in which the number of parts can be reduced and the cost can be reduced by arranging the accommodating hole 12 in a simple rectangular shape and disposing a roller having no shaft in the accommodating hole 12. The purpose is to solve the above problems. Further, in the configuration in which the roller having no shaft is arranged in the storage hole 12 as described above, the roller may sometimes be deformed due to the friction between the roller and the wall surface of the storage hole. In order to eliminate the problem, rolling members are arranged on the front and rear wall surfaces of the storage hole,
As a result, the frictional resistance between the front and rear wall surfaces of the housing hole for housing the roller and the roller is reduced to prevent the deformation of the roller.

[0010]

For this reason, the present invention provides a tool rest movably provided with respect to a frame so as to traverse a sheet material, a rotary blade pivotally supported by the tool rest, and the rotary blade. A fixed blade arranged to come into contact with the rotating blade, and a rotating mechanism for rotating the rotating blade, wherein the rotating mechanism is a rotating blade,
The roller is arranged between the rotary blade and the frame, and the roller is rotated by the movement of the tool rest with respect to the frame, and the rotation of the roller causes the rotary blade to slightly tilt in the traveling direction. In a sheet material cutting device adapted to be rotated in a material cutting direction, the roller is formed as a roller having no rotation axis, and the roller is a substantially rectangular shape formed on a tool rest supporting a rotary blade. A sheet material cutting device, which is rotatably arranged in a storage hole of

A tool rest movably provided with respect to the frame so as to traverse the sheet material, a rotary blade pivotally supported by the tool rest, a fixed blade arranged to come into contact with the rotary blade, A rotary mechanism for rotating the rotary blade, wherein the rotary mechanism is composed of a rotary blade and a roller arranged between the rotary blade and the frame, and the tool rest moves by moving the tool post relative to the frame. In the sheet material cutting device in which the rotary blade is rotated in the cutting direction of the sheet material while being slightly tilted in the traveling direction by the rotation of the roller, the roller is formed as a roller having no rotation axis. Further, the roller is rotatably arranged in a substantially rectangular storage hole formed in a tool rest that supports a rotary blade, and the front and rear wall surfaces of the storage hole facilitate the rotation of the roller. A sheet material cutting apparatus being characterized in that the rolling member is provided that.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view and a side view of the entire sheet material cutting apparatus according to the embodiment of the present invention. Since the main constituent members are the same as those of the sheet material cutting apparatus disclosed in JP-A-5-200694, Here, the characteristic part of the present invention will be mainly described. Further, the same reference numerals are used for the same members as those in the conventional example. In FIG. 1, reference numeral 8 is a frame, and the frame 8 supports both ends of a screw shaft 5 as a moving means for moving the tool rest 2. A drive device 6 for rotating the screw shaft 5 is attached to one end of the screw shaft 5. The drive device 6 includes a motor and a transmission mechanism for transmitting a rotational force from the motor to the screw shaft 5. Become. A fixed blade 4 that cuts the sheet material in cooperation with a rotary blade 1 described later is attached to the frame 8.

A tool rest 2 is screw-fitted to the screw shaft 5, and the tool rest 2 is supported so as to be movable without a "play" with respect to a guide portion formed on a frame 8 as described later. Has been done. Then, when the motor is driven, the screw shaft 5 rotates, and the tool rest 2 moves in the direction of the arrow in the figure. At this time, the rotary blade 1 mounted on the tool rest 2 and the frame 8 side are moved. The sheet material is cut in cooperation with the fixed blade provided.

The reciprocating movement of the tool rest 2 is carried out by reversing the direction of rotation of the screw shaft 5 by rotating the motor forward or backward or switching the transmission mechanism. By using a left-helix continuous screw, it is possible to reciprocate the tool rest 2 with respect to the screw shaft 5 without changing the rotation direction of the motor.

The tool rest 2 is provided with a rotating means including a rotary blade 1 for cutting a sheet material and a roller for rotating the rotary blade 1 and the like. The structure of the tool rest 2 will be described below. FIG. 2 is an enlarged plan view of the tool rest 2 and a sectional view taken along the line AA.

In FIG. 2, reference numeral 8 is a frame, 5 is a screw shaft, and the tool rest 2 is guided to the screw shaft 5 without any "play". A fixed blade 4 that abuts the rotary blade 1 provided on the tool rest 2 is fixed to the frame 8 with screws or the like. The turret 2
The tool post 2 is integrally molded with resin, and the tool post 2 has a housing hole 12 for housing a rotary blade 1, a pressing spring 10, and a roller 11 as a tilting means having a function of tilting the rotary blade 1 in a moving direction when the rotary blade 1 is cut. Has been done.

The accommodating hole 12 is formed as an elongated hole penetrating in parallel with the moving direction of the tool rest 2, and the accommodating hole 12 accommodates a roller 11 having no shaft.
The roller 11 has a thickness slightly smaller than the width of the housing hole 12, and the roller 11 and the tool rest 2 are made of a material having good slidability in order to reduce frictional resistance between them. In addition, the inventors of the present invention produced the tool rest 2 from an acetal resin containing silicon oil, which is a resin having very good slidability, and made the roller 11 from an acetal resin having good slidability to perform a cutting test. Good results have been obtained over 30,000 times.

Next, the operation of the sheet material cutting device of the above embodiment will be described. In FIG. 2, the tool rest 2 is a frame 8
Consider the state of moving to the left in the figure along. When the motor is operated and the screw shaft 5 rotates and the tool rest 2 starts moving to the left in the drawing, the roller 11 rotates due to the frictional force with the frame 8, and the rotation of the roller 11 also rotates the rotary blade 1. Further, since the rotary blade 1 is inclined slightly forward with respect to the traveling direction by the roller 11, the rotary blade 1 contacts the fixed blade 4 at a point P, and as a result, the sheet material S is fixed to the rotary blade 1 and the fixed blade 4. The cooperation with the blade 4 results in sharp cutting. As described above, in the present embodiment, the roller 11 is not provided with the shaft, and the storage hole 1 is further provided.
Since it is not necessary to form the bearing portion for 2 as well, the component can be manufactured at low cost.

Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the roller 1
Since it is necessary to take a large frictional force with the frame 8 in order to improve the rotation of the roller 1, the roller 11 is formed of a relatively soft plastic material. However, with the roller 11 made of such a soft material, even if a material having good slidability is used for the tool rest 2 and the roller 11 as described above, the contact between the roller 11 and the front and rear wall surfaces of the storage hole 12 is inevitable. The frictional resistance generated by This frictional resistance gives an irregular resistance to the roller 11 during long-term use, and as a result, the roller 11 gradually deforms from a circular shape to an elliptical shape or a circular shape close to a triangle to rotate and rotate. The blade 1 may not be able to rotate smoothly.

The present embodiment has been made in order to eliminate the above-mentioned inconvenience, and the storage hole which can smoothly rotate the roller 11 even when the roller 11 is in contact with the front and rear wall surfaces. There are 12 features. Therefore, the configuration other than the storage hole 12 is the same as that of the first embodiment, and the description thereof will be omitted. In FIG. 3, the storage hole 12 formed in the tool rest 2 is formed as a long hole penetrating in parallel with the moving direction of the tool rest 2.
Rolling members 13 for smoothly rotating the roller 11 are provided on the front and rear wall surfaces to reduce the frictional resistance between the roller 11 and the wall surface. The rolling member 13 has an intermediate height of the wall surface as shown in FIG. 3, or a little higher than the intermediate height as shown in FIG.
You may provide in a step. In short, any rolling member having a function of reducing friction between the roller 11 and the wall surface may be used.

Next, the operation of the sheet material cutting device of the above embodiment will be described. In the figure, when the motor is actuated and the screw shaft 5 rotates and the tool rest 2 starts moving to the left in the figure, the roller 11 rotates due to the frictional force with the frame 8, and the rotary blade 1 also rotates due to the rotation of the roller 11. To do. Further, since the rotary blade 1 is inclined slightly forward with respect to the traveling direction by the roller 11, the rotary blade 1 contacts the fixed blade 4 at a point P, and as a result, the sheet material S is fixed to the rotary blade 1 and the fixed blade 4. The cooperation with the blade 4 results in sharp cutting. In addition, front and rear wall surfaces 12a, 1 of the storage hole 12
Since the rolling member 13 is provided in 2b, the storage hole 12
Since the frictional resistance between the roller 11 and the rolling member 13 is small when the roller 11 moves inside and comes into contact with the front and rear wall surfaces 12a and 12b, the roller 11 rotates smoothly, which causes the disadvantage that the roller 11 is deformed. It can be resolved.

As described above, according to the present invention, in the device for cutting the sheet material by the cooperation of the rotary blade and the blade abutting against the rotary blade, the storage hole is simply rectangular and the roller having no shaft in the storage hole. By adopting the configuration in which the rollers are arranged, it is possible to obtain an inexpensive sheet material cutting device with a small number of parts, and since the rolling members are arranged on the front and rear wall surfaces of the housing hole for housing the rollers, the rollers can be smoothly rotated. As a result, it is possible to provide a sheet material cutting device that is sharp and inexpensive. In addition,
It is natural that the mechanism as described above can be applied to the roller accommodating hole in the sheet material cutting device of various forms in which the rotary blade is rotated by using the roller described above,
Furthermore, the present invention can be embodied in various other forms without departing from the spirit and the main characteristics thereof. Therefore, the above-described embodiments are merely examples, and should not be construed as limiting. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

[0023]

As described above in detail, in the sheet material cutting device according to the present invention, the storage hole is simply rectangular, and the roller having no shaft is arranged in the storage hole. An inexpensive sheet material cutting device with a reduced number of points can be obtained. Further, in order to reduce the frictional resistance between the storage hole for storing the roller and the front and rear wall surfaces and the roller, the rollers are arranged on the front and rear wall surfaces of the storage hole, whereby the front and rear wall surfaces of the storage hole for storing the roller and the roller. Since the frictional resistance is reduced, the roller will not be deformed even if the paper or the like is cut for a long period of time, and the sheet material can be sharply cut by the stable rotation of the roller at all times. Can be played.

[Brief description of the drawings]

FIG. 1 is a plan view and a side view of a sheet material cutting device according to an embodiment of the present invention.

FIG. 2 is a plan view and a cross-sectional view of a tool rest according to the first embodiment of the present invention.

FIG. 3 is a plan view and a sectional view of a tool rest according to a second embodiment of the present invention.

FIG. 4 is a plan view and a sectional view of a tool post according to a third embodiment of the present invention.

FIG. 5 is a plan view and a sectional view of a tool rest according to a fourth embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a conventional sheet material cutting device.

FIG. 7 is an operation explanatory view of a rotary blade of a conventional sheet material cutting device.

FIG. 8 is a plan view for explaining the operation of a rotary blade of a conventional sheet material cutting device.

FIG. 9 is a plan view of a tool rest of a conventional sheet material cutting device.

FIG. 10 is a sectional view of FIG. 9;

[Explanation of symbols]

 1 Rotary Blade 2 Turret 4 Fixed Blade 5 Screw Shaft 6 Drive Mechanism 8 Frame 10 Holding Spring 11 Roller 12 Storage Hole 13 Rolling Member

Claims (3)

[Claims] 1. A tool rest movably provided with respect to a frame so as to traverse a sheet material, a rotary blade pivotally supported by the tool rest, and a fixed blade arranged so as to come into contact with the rotary blade. A rotary mechanism for rotating the rotary blade, the rotary mechanism comprising a rotary blade and a roller arranged between the rotary blade and the frame, and by moving the tool rest with respect to the frame. In a sheet material cutting device in which the roller is rotated, and further the rotary blade is rotated in the cutting direction of the sheet material while being slightly inclined in the traveling direction by the rotation of the roller, the roller is a roller having no rotation axis. The sheet material cutting device according to claim 1, wherein the roller is rotatably arranged in a substantially rectangular storage hole formed in a tool rest that supports a rotary blade. 2. A tool rest movably provided with respect to the frame so as to traverse the sheet material, a rotary blade pivotally supported by the tool rest, and a fixed blade arranged to be in contact with the rotary blade. A rotary mechanism for rotating the rotary blade, the rotary mechanism comprising a rotary blade and a roller arranged between the rotary blade and the frame, and by moving the tool rest with respect to the frame. In a sheet material cutting device in which the roller is rotated, and further the rotary blade is rotated in the cutting direction of the sheet material while being slightly inclined in the traveling direction by the rotation of the roller, the roller is a roller having no rotation axis. Further, the roller is rotatably disposed in a substantially rectangular storage hole formed in the tool rest that supports the rotary blade, and the front and rear wall surfaces of the storage hole facilitate the rotation of the roller. A sheet material cutting device, characterized in that a rolling member is provided. 3. The sheet material cutting device according to claim 1, wherein at least one rolling member is provided on the front and rear wall surfaces.