JPH0976190A - Cutter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To finish sheet cutting within a specified period of time by miniaturizing a device main body (facsimile, etc.) equipped with a cutter by thinning a cuter device and by reducing a distance from a recording part to a cutter cutting position. SOLUTION: A cutter device 5 is furnished with a plate member 6 and a circular blade 7. The plate member 6 is arranged so that its flat plate part 6a becomes roughly rectangular with conveying directions P, Q of a sheet 1. A fixed blade 6b is provided on an upper end part of the flat plate part 6a. The sheet 1 is cut by installing the disc type circular blade 7 on a slider 8 free to rotate and moving the circular blade 7 with one part of it made contact with the fixed blade 6b. Consequently, it is possible to thin the cutter device 5 against the carrying direction of the sheet 1 and to miniaturize a device main body and to shorten cutting time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter device, and more particularly to a cutter device suitable for facsimiles, printers and the like which are required to be downsized.

[0002]

2. Description of the Related Art A cutter device provided in a facsimile device, a printer device, or the like is, for example, as shown in FIGS. 3 and 4 (indicated by 51 in FIG. 3), has a plate shape parallel to the traveling direction of a sheet 1. A fixed blade 61, which is a member, is disposed, and a round blade 71 that is in contact with the fixed blade 61 at substantially right angles is disposed (see Japanese Patent Application Laid-Open No. 5-50393).

The circular blade 71 is a slider 81 which is a block-shaped member.
Is rotatably held, the slider 81 is pulled by the wire 9, and the wire 9 is stretched between the pulleys 15a and 15b. Slider 81, wire 9, pulley 15
The a and 15b are arranged on the opposite side of the fixed blade 61 from the round blade 71 (see FIG. 3), and in order to hold these members, a guide 12 formed by bending a plate-shaped member is provided.

Recording is performed on the sheet 1 by the thermal head 2. When the recording is finished, the recording end point of the sheet 1 is fast-forwarded to the cutting position of the cutter to stop the sheet. Then, the sheet 1 is cut. After that, in order to omit a wasteful portion which is not used for recording on the sheet 1, after the sheet is cut, the same amount of movement as the fast-forwarding amount described above is reversely sent to the recording position, and the next recording starts. Therefore, if the distance between the recording position of the head 2 and the cutting position of the cutter is long, it takes time to cut and return the paper, and it is not possible to meet the timing when the next signal comes in.

[0005]

The first problem is that the fixed blade 61 and the guide 12 are in parallel relationship with the sheet 1, and each member has a considerable thickness for holding the operating force. , The dimension in the paper transport direction (a in FIG. 4) becomes large,
It is impossible to downsize the device.

The second problem is that the distance between the print position and the paper cutting position is too large, and therefore it takes too much time to cut the paper. In particular, it is recommended that facsimile machines receive the next recording within the specified time determined by the CCITT international standard. In order to achieve this, in conventional machines, the speed of the conveyance motor is extremely high. If it is too early or if the cutting time is too long, a pseudo signal is given to increase the time to perform the cutting operation.

The present invention has been made in view of the above points. By thinning the cutter, the size of the apparatus can be reduced, and the distance from the recording unit to the cutting position of the cutter can be shortened for a specified time. The purpose is to finish the paper cutting within.

[0008]

In order to solve the above problems, according to the present invention, as shown in FIGS. 1 and 2, a fixed blade 6b is provided at an end of a plate-like member 6 having a flat plate portion 6a to form a flat plate. The plate member 6 is arranged so that the portion 6a intersects the conveyance directions P and Q of the sheet 1, and the movable blade 7 is moved along the fixed blade 6b while being in contact with the fixed blade 6b. The sheet 1 is cut by the moving blade 7 and the moving blade 7.

With the above arrangement, the width of the cutter device in the sheet conveying direction can be reduced, the distance from the recording portion to the cutting position of the cutter can be shortened, and the device can be downsized accordingly. In addition, since the distance for feeding out the paper for cutting the paper that has approached the recording unit and for feeding back after cutting is short, the time from the start to the end of the operation for cutting can be shortened.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing an example in which a cutter device 5 of the present invention is installed in a facsimile device, and FIG. 2 is an enlarged perspective view of the cutter device 5.

The sheet 1 is a heat-sensitive recording sheet that senses heat and develops color, and is conveyed while pressure is applied between the thermal head 2 and the platen 3 which change an electric signal into heat. Head 2
Records on the recording paper in addition to heat according to the input electric signal.

The sheet 1 is conveyed in the P direction by the rotation of the platen roller 3 in order to cut the recording end portion 4a and is conveyed to the cutting position 4b of the cutter device 5, where the rotation of the platen roller 3 is stopped, Cutting is performed by the cutter device 5. The configuration and operation of the cutter device 5 will be described later.

In order to carry out the next recording, the paper 1 cut by the cutter device 5 is rotated in the reverse direction (Q direction) so that the paper 1 is printed at the print position of the head 2 (the recording end position). (Same as 4a) Return to a point 4c 2 to 3 mm before (4a), stop rotation control and stop. The reason for stopping the sheet 1 at the front side 4c is to prevent the sheet 1 from coming off from between the head 2 and the platen roller 3 due to control or variation in device members at the exact position.

Further, if the paper 1 is returned in the Q direction, it will be a wasteful area between the recording end portion 4a and the cutting position 4b that is not recorded unless it is returned, and the original size sent from the other party is recorded. This is because the size in the lengthwise direction of the paper will be different from that of the original if the unprinted portion is added.

The cutter device 5 includes a plate member 6 and a round blade 7. The plate member 6 includes a flat plate portion 6a and a flat plate portion 6
a fixed blade 6b formed on the upper end of a and a U-shaped portion 6c formed by bending the lower end of the flat plate portion 6a three times.
It is composed of The plate-shaped member 6 is arranged so that the flat plate portion 6a intersects the conveyance direction of the sheet 1 (substantially orthogonal in the embodiment). Therefore, the fixed blade 6b is also arranged substantially at right angles to the conveyance direction of the sheet 1.
The plate-shaped member 6 may be arranged at an angle, not at right angles to the carrying direction.

The round blade 7 as a movable blade is rotatably supported by a slider 8 and is attached so as to be positioned on substantially the same plane as the fixed blade 6a, and a part thereof is pressed by the fixed blade 6a. The slider 8 is connected to a part of the wire 9, and the wire 9 is fixed to both ends of the plate-like member 6 by pins 10 and 10.
Pulley 11a and pulley gear 11 that are rotatably held by
It is held with tension on b.

The pulley gear 11b is connected to the motor 12 through a gear portion, and the circular blade 7 is moved in the R and S directions while rotating by the forward and reverse operation of the motor (control operation signal from the electric portion), and the paper 1 Disconnect.

The forward and reverse timings of the motor 12 are ON / OFF of a micro switch 13 provided on the motor 12 side and in a position where it contacts a part of the slider 8.
It is performed based on the operation. After the motor 12 is normally rotated for a predetermined time to move the slider 8 in the S direction, the motor 12 is reversely rotated and moved in the R direction to be returned. As another method for controlling the forward / reverse rotation of the motor 12, the micro switch 1
It is also possible to arrange the same as that of No. 3 on the opposite side, output an ON / OFF signal by contact with the slider 8, and switch the rotation direction of the motor 12 by this signal.

The slider 8 is usually stationary at a position where it does not interfere with the running of the sheet 1. When the paper 1 is cut, the motor 12 is operated by the electric signal from the electric section, and the slide 8
Move in the S direction. By moving in the S direction while pressing a part of the flat blade or the ridge line of the fixed blade 6b and a part of the round blade 7, the sheet 1 is cut, and the slide 8 hits the pin 10 or the pulley 11a at the end in the S direction. Although the motor 12 rotates, the operation of the slide 8 stops (when the rotational force of the motor 12 exceeds the frictional force between the wire 9 and the pulley, the wire 9
Slips). By this time, the respective members are arranged in such a positional relationship that all cutting in the width direction of the paper is completed.

After the cutting, the sheet 1 is sent back by rotating the platen roller 3 in the Q direction. Further, the motor 12 reverses after a lapse of a predetermined time (here, since it is a DC motor, positive and negative are electrically reversed), the slide 8 is moved in the R direction, the electric signal is stopped by the detection by the micro switch 13, and the motor is stopped. 12 stops.

The fixed blade 6 is made of a rust-resistant stainless steel material, and a plate material having a thickness of about 0.5 to 0.8 mm is used. The pulleys 11a and 11b need only have a thickness sufficient to hold the wire 9 having a thickness of about 0.3 mm, and for example, 1 to 2 mm is sufficient. The diameter of the pulley is, for example, about 15 mm.

The slide 8 is required to have a size capable of holding the round blade 7 and transmitting the operating force, but the thickness of the round blade 7 is 0.3 mm.
Therefore, the thickness of the slide 8 may be about 3 mm.
Therefore, in the cutter of this embodiment, the thickness of each member after assembly is about 3 to 4 mm, and a very thin cutter can be obtained.

Next, a concrete comparison will be made between the conventional cutter device shown in FIGS. 3 and 4 and the cutter device of this embodiment.
First, comparing the sizes, the conventional cutter device 51
The flat portion of the fixed blade 61 is arranged along the conveyance direction of the sheet 1, and the pulley 1 provided on the flat portion of the fixed blade 61 is
The width a of the fixed blade 61 by 5a, 15b, the guide 12, etc.
Requires about 30 mm. Considering the shape of the platen roller 3, the required gap from the print position of the head 2 to the cutter device 51 is about 10 mm, so the distance b from the print position of the head 2 to the cut position of the cutter device 51 is about 40 mm.
mm.

On the other hand, according to the present embodiment, the distance B from the print position of the head 2 to the cutting position of the cutter device 5 is the thickness of the cutter device 5, the print position of the head 2 and the cutter device 5. Approximately 15 including the required gap of up to 10 mm
mm.

As described above, when the cutter device of the above embodiment is used, the depth dimension of a facsimile device equipped with a cutter can be reduced by about 25 mm, and the bottom area of the facsimile device is also 10%. The size can be reduced to some extent, and the device can be downsized.

Comparing the cutter cutting times, first, as a motor for rotating the platen roller 3, a small and inexpensive PM type motor is used, and one step angle is 15 degrees. And the general self-starting frequency of the motor, 30 mm per second is the maximum feed speed of the sheet 1. Also, the cutting time for paper 1 is J
It takes about 0.8 seconds one way with IS B4 size (257 mm).

Therefore, after printing, the time (cutting time) until the cutting position of the paper 1 is sent to the position of the cutter, the paper is cut, and the paper is rewound is (40 mm). / 30mm) second +0.8 second + (40mm /
30 mm) seconds + 0.4 seconds = 3.87 seconds. Where 0.
4 seconds is the electrical processing time required between each operation.

On the other hand, in the apparatus of this embodiment, (15 mm / 30 mm) seconds + 0.8 seconds + (15 mm / 30 mm)
Seconds + 0.4 seconds = 2.2 seconds, which is 1.67 compared to conventional equipment.
Seconds can be reduced.

The minimum time between manuscripts recommended by the international standard of facsimile is about 2.5 seconds, and the cutter device of this embodiment can be used without any problem. In the conventional apparatus, the pseudo signal is transmitted to deal with this, and it takes about 4 seconds (about 1.5 seconds more than the standard) communication time for one document interval. In order to avoid such a long communication time, if a memory that stores a large amount of electric signals is prepared in the device and received at one time, the communication time will be the shortest, but the memory A large amount of material cost is required and the price of the device is increased. By using the cutter device of the present invention, the cutting time can be shortened, so recording can be performed while directly communicating with the other party without the need for the above-mentioned expensive member, and like the conventional device. There is no need to deal with the pseudo signal.

[0030]

As described above, according to the present invention,
By thinning the cutter device, the device can be downsized, and the distance from the recording unit to the cutter cutting position can be shortened to finish the paper cutting within a specified time.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a facsimile device incorporating a cutter device according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the cutter device of FIG.

FIG. 3 is a schematic view showing an example of a facsimile device incorporating a conventional cutter device.

FIG. 4 is an enlarged perspective view of a conventional cutter device.

[Explanation of symbols]

 1 paper 2 thermal head 3 platen roller 5 cutter device 6 plate member 6a flat plate portion 6b fixed blade 6c U-shaped portion 7 round blade 8 slider

Claims (3)

[Claims] 1. A fixed blade is provided at an end of a plate-shaped member having a flat plate portion, the plate-shaped member is arranged so that the flat plate portion intersects with a sheet conveying direction, and the movable blade is the fixed blade. A cutter device, which is moved along the fixed blade while being in contact with, and cuts the sheet by the fixed blade and the movable blade. 2. The cutter device according to claim 1, wherein the fixed blade has a length equal to or larger than a width of the paper. 3. The cutter device according to claim 1, wherein the movable blade is a disk-shaped blade that is rotatably supported.