JPH06315887A - Sheet material cutting device - Google Patents

Abstract

PURPOSE:To provide a sheet cutting device moving a rotary edge to cut a sheet material, attached with no paper discharge roller, and generating no paper chips when the sheet material is cut. CONSTITUTION:A sheet material guide mechanism 7 paired with a fixed edge 1 is provided so as to sandwich a rotary edge 2 below on a sheet material cutting device rotatively moving the rotary edge 2 supported by a carriage 3 along the fixed edge 1 provided across a sheet material S and cutting the sheet material S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a long sheet material such as a roll paper or a folding continuous paper used in an image forming apparatus such as a facsimile, a printer or a copying machine, and more particularly to a device for cutting a long sheet material. The present invention relates to an improvement of a sheet material cutting device that cuts a sheet material by moving a rotary blade supported by a carriage along a fixed blade provided.

[0002]

2. Description of the Related Art A perspective view of a general example of a sheet material cutting device for cutting a sheet material by moving a rotary blade supported by a carriage along a fixed blade provided across the sheet material is illustrated. 4 shows a sectional view thereof in FIG. In the figure, reference numeral 11 is a fixed blade, and 12 is a rotary blade. The rotary blade 12 is rotatably supported by a shaft 12a with respect to a carriage 13, and the carriage 13 is fixed to a part of a carriage carrying wire 15. The carriage transport wire 15 is driven by the motor 14, and thereby the carriage 13 reciprocates in the arrow direction. Reference numeral 16 shown in FIG. 5 is a guide plate, and the reciprocating motion is performed along the guide plate 16. FIG. 6 shows an example in which a sheet discharge roller 17 is added to the sheet material cutting device to discharge the cut sheet in the arrow direction. An example of a sheet material cutting device to which a paper discharge roller is added as shown in FIG. 6 is described in, for example, Japanese Patent Publication No. Sho 60-13354. The number of sheet material cutting devices that do not use rollers is increasing.
(See Publication No. 5).

[0003]

However, in a sheet material cutting apparatus that cuts a sheet material by moving the rotary blade as described above and does not add a paper discharge roller, after cutting a large number of sheets, the paper sheet is cut. A large amount of powder may be generated,
This is an aesthetic problem, and paper dust may enter the sliding parts of the cutting device, resulting in poor cutting. As a result of the experiment, it has been clarified that the cause of the paper dust is that the sheet material at the cut portion falls during cutting as shown in FIGS. 7 (a) and 7 (b). In other words, as long as the sheet material is cut while tension is applied by the discharge rollers, etc., cutting is performed without producing paper dust, but the sheet material portion located downstream of the cutter is free. When cut in the state (non-tensioned state), it is clear that paper powder, especially in the case of thermal paper, a relatively large amount of powdered paper fibers containing the heat-sensitive agent layer on the surface is produced. became. In particular, it was found that more paper dust was produced near the end of the cutting process. Therefore, even if it is a device that cuts the sheet material by moving the rotary blade, the sheet material cutting device to which the paper discharge roller is added as shown in FIG. Therefore, no paper dust is generated.

[0004]

SUMMARY OF THE INVENTION The present invention is a device for cutting a sheet material by moving a rotary blade, and a sheet material cutting device which does not add a discharge roller. An object of the present invention is to provide a sheet material cutting device that does not generate paper dust during cutting.

[0005]

In a sheet material cutting device for cutting a sheet material by rotating a rotary blade supported by a carriage along a fixed blade provided across the sheet material, A sheet material cutting device comprising a sheet material guide mechanism which is paired with a fixed blade so as to sandwich the blade edge of a rotary blade.

[0006]

[Function] The sheet material guide mechanism, which is paired with the fixed blade and sandwiches the blade edge of the rotary blade, allows the separated sheet material to rest on the sheet material guide plate, so that a light tension is maintained. It will be cut in the state of being cut, and the sheet material at the separated part will not fall.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1A is a sectional view showing an embodiment of the present invention, and FIG. 1B is a perspective view thereof. Fig. 2 (a) is a perspective view showing a state where the sheet material cutting device is cutting the sheet material, (b)
Is a sectional view thereof. In the figure, reference numeral 1 is a fixed blade fixed to a lower fixed frame, 2 is a rotary blade, the rotary blade 2 is rotatably supported by a carriage 3, and the carriage 3 is an endless carriage transport wire. It is fixed to a part of 5. The carriage carrying wire 5 is driven by the motor 4, whereby the carriage 3 reciprocates as shown by the arrow in the figure. Reference numeral 6 denotes a guide plate, and the reciprocating movement is performed along the guide plate 6. In addition, as shown in FIGS. 1 (a) and 2 (b), the sheet material guide faces the fixed blade 1 and sandwiches the lower end (blade edge) of the rotary blade 2 between the fixed blade 1 and the blade edge of the fixed blade. A plate 7 (sheet material guide mechanism) is provided. The sheet material guide plate 7 is supported by the sheet material cutting device.

The operation of the present sheet material cutting device having the above-mentioned structure, for example, in a Famisimili is as follows. By the sheet material conveying means not shown,
While moving the sheet material at a predetermined speed, the recording means (not shown) records the received information on the moving sheet paper. By the above sheet material conveyance, the recorded sheet paper S advances on the fixed blade 1 in the direction of the arrow in FIG. 2 (b), and further, since there is the sheet material guide plate 7, it does not fall downward and While keeping the horizontal state, the sheet material guide plate 7 is continuously advanced in the direction of the arrow. At this time,
The rotary blade 2 is retracted outside the width of the passing sheet material. When recording of one page is completed and the cutting position of the sheet material reaches a position where the fixed blade 1 and the rotary blade 2 come into contact with each other, the control means (not shown) controls the sheet material conveying means to move the sheet material to the sheet paper. Stop the transportation of. Then, the motor 4 is rotated by the control means (not shown), and thereby the carriage carrying wire 5 is driven, and the carriage 3 fixed to the carriage carrying wire 5 moves along the guide plate 6. The rotary blade 2 is supported by the carriage 3, and the movement of the carriage 3 causes the rotary blade 2 to rotate along the fixed blade 1 while being in contact with the fixed blade 1 to cut the sheet material. As shown in FIG. 2, the separated sheet material S is placed on the sheet guide plate 7, so that the depression as in the case of the above-mentioned conventional technique does not occur. When the rotary blade 2 detects that the cutting is completed across the entire width of the sheet material by a sensor or the like not shown (or by counting the pulse number of the step motor), the motor 4 rotates in the reverse direction, and The rotary blade 2 moves in the opposite direction and returns to its original position.

As a result of an experiment, the exact position where the sheet material guide plate 7 is provided is configured so that the height of the upper surface of the guide plate is 0 to 10 mm lower than the height of the upper surface of the fixed blade. It has been clarified that it is optimal to configure the gap between the guide plate and the fixed blade to be 0.3 to 10 mm (see Fig. 1 (a)). On the other hand, sheet material guide plate 7
The width (horizontal length shown in FIG. 1 (a)) may be arbitrary. Further, the length of the sheet material guide plate 7 is substantially the same as the cutting length of the cutting device, that is, the width of the sheet material, as shown in FIG. 1 (b).

FIG. 3 is a sectional view showing an embodiment in which a sheet material guide mechanism composed of a sheet material guide plate, sheet material guide plate supporting means and the like is directly supported by a main body equipped with a sheet material cutting device. In the figure, 8 is a sheet material guide mechanism integrated with the main body base. The sheet material guide mechanism 8 may not be integrated with the main body base, and may be later assembled to the main body. 1 to 7, the shape of the fixed blade is different, but this is because the fixed blade and the like are modeled and shown.

[0011]

As described above, according to the present invention,
In a small facsimile etc. that does not use the paper ejection roller, the falling of the sheet material at the separated part is eliminated and the necessary and sufficient tension is applied to the sheet material, so paper dust will not be generated when cutting the sheet material, therefore ,
There is no aesthetic problem, and there is no possibility that paper dust will enter the sliding parts of the cutting device and cause poor cutting.

[Brief description of drawings]

1A and 1B are a sectional view and a perspective view showing an embodiment of the present invention.

2A and 2B are a perspective view and a cross-sectional view showing a state of the sheet material while the sheet material cutting apparatus embodying the present invention is cutting the sheet material.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a perspective view showing an example of a conventional technique.

FIG. 5 is a sectional view showing an example of a conventional technique.

FIG. 6 is a cross-sectional view showing an example in which a sheet discharging device is added to a sheet material cutting device according to a conventional technique.

7A and 7B are a perspective view and a cross-sectional view showing a state of the sheet material while the sheet material cutting device according to the related art is cutting the sheet material.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fixed blade, 2 ... Rotating blade, 3 ... Carriage, 4 ... Motor, 5 ... Carriage conveyance wire, 6 ... Guide plate, 7 ... Sheet material guide plate, 8 ... Sheet material guide mechanism integrated with the main body base , 11 ... Fixed blade, 12 ... Rotating blade, 13 ... Carriage, 14 ... Motor, 15 ... Carriage transport wire, 16 ... Guide plate, 17 ... Paper ejection roller.

Claims (4)

[Claims] 1. A cutting edge of a fixed blade in a sheet material cutting device for cutting a sheet material by rotating a rotary blade supported by a carriage while rotating the rotary blade along a fixed blade provided across the sheet material. A sheet material cutting device, wherein a sheet material guide mechanism is provided so as to sandwich a blade edge of a rotary blade between the sheet material cutting mechanism and the sheet material guide mechanism. 2. The height of the upper surface of the sheet material guide mechanism is 0 to 10 mm lower than the height of the upper surface of the fixed blade, and the gap between the sheet material guide mechanism and the fixed blade is 0.
The sheet material cutting device according to claim 1, wherein the sheet material cutting device is configured to have a thickness of 3 to 10 mm. 3. The sheet material cutting device according to claim 1, wherein the guide mechanism is supported by the sheet material cutting device. 4. The sheet material cutting device according to claim 1, wherein the guide mechanism is supported by a main body having a sheet material cutting device.