JPS61173889A - Sheet cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a sheet cutting device comprising a pair of blades and a supporting member that supports the blades, and in particular, a sheet conveying means and a guiding means are provided in the cutting device. This invention relates to a sheet cutting device characterized by having a built-in sheet cutting device.

<Prior Art> Conventionally, machines using recording sheets, such as facsimile machines and copying machines, are provided with sheet converters and sheet guide means for feeding the sheets before and after the sheet cutting device. When conveying a sheet, it is generally necessary to roll the leading edge of the sheet between the sheet conveying roller and the guiding guide, or between the guide and the cutting device. This often caused blockages. Therefore, in the past, in order to improve this drawback, the gap between the roller and the guide had to be adjusted with an accuracy of about 0.1 fi, which required skill and was time-consuming.

A specific example of the conventional sheet cutting device will be explained with reference to FIGS. 3 and 4. In the conventional device, the platen roller l
was attached to the chassis 3 via its bearing 2, the guide 4 was attached to the stay 6 with an adjustment screw 5, and the sheet cutting device 7 was attached to the stay 6 with screws 8 separately, so the overall is extremely complex and has many components, so it is not possible to unitize the device to simplify assembly work and mutual position adjustment of the components, and it is not possible to miniaturize the entire device or reduce costs. It had drawbacks such as being unable to do so.

<Problems to be Solved by the Invention> The device of the present invention is a completely new technology that fundamentally improves these conventional drawbacks. The present invention aims to provide a sheet cutting device that reduces the overall number of component parts, unitizes them, and eliminates the need to adjust the positional relationship of these components.

<Means for Solving the Problems> To specifically explain one embodiment of the device according to the present invention with reference to the drawings, in FIGS. The platen roller 1 is attached to this support frame 9 via a bearing 2. The guide 4 is attached and fixed to the support frame 9 via a fixing bolt 10. Reference numeral 11 denotes a pair of paper ejection rollers, which are integrally attached to the support frame 9.

In the figure, reference numeral 12 denotes a recording sheet, the leading edge of which is pulled out from the take-up roller 13 is held between the paper ejection rollers 11, so that it is conveyed in a stretched state from the take-up roller 13 to the paper ejection roller 11. . And this sheet 1
2 is guided by the platen roller 1 between the driving blade and the biasing blade of the surfacing device 17. This sheet cutting device 7 is
It has a driving blade 15 that is rotated by a motor (not shown) via a pin 15a, and a biasing blade 16 that is urged in the direction of the driving blade 15 by a spring 16a. As the driving blade 15 rotates, the driving blade 15 engages with the urging blade 16 and cuts the meshing sheet 12 from one end to the other end together with the urging force of the spring 16a. Note that 17 is a drive motor, 18 is a drive gear, and 19
is a driven gear, and the rotation of the motor 17 is controlled by the gear 18.1.
9 to the platen roller 1.
Rotate. Further, 20 is a screw for attaching the sheet cutting device 7 to the support frame 9.

As described above, in the apparatus according to this embodiment, the bearing 2 of the platen roller 1, the guide 4, and the paper ejection roller 11 are all integrally attached to the support frame 9 to which the sheet cutting device 7 is attached and fixed. Since the structure is attached, the entire unit can be made into a unit, and therefore many supporting members are not required compared to the conventional device, and the number of component parts can be reduced. The positional relationship between the two can be left unadjusted.

<Example> In the above embodiment, a sheet conveying means using a platen roller, a paper ejection roller, etc. was explained, but the present invention is not limited to this, and it is also possible to use, for example, an endless belt suspended on a pulley for conveying a sheet. Any one can be used. Further, in the embodiment described above, an example in which a sheet is guided to a sheet cutting device has been described, but the present invention is not limited to this case, and the sheet may be guided between paper discharge rollers after passing through a sheet cutting device.

Note that the cutting edges of the driving blade and the biasing blade may be, for example, cylindrically polished curved blades or straight blades.

<Effects of the Invention> Since the device according to the present embodiment has the structure and function as described above, the entire device can be made into a unit, which makes it possible to replace the unit, and reduces the number of component parts, simplifying the assembly work. It can be mass-produced easily, and by eliminating the need to adjust the positional relationship of each component, it eliminates the need for complicated adjustment work and completely prevents paper jams caused by mistakes in adjustment. This has features such as being able to improve the reliability of sheet conveyance.

[Brief explanation of drawings]

FIGS. 1 and 2 are explanatory diagrams showing essential parts of an embodiment of the apparatus according to the present invention, and FIGS. 3 and 4 are explanatory diagrams of a conventional apparatus. 1 is a platen roller, 2 is a bearing, 4 is a guide, 6 is a stay, 7 is a cutting device, 9 is a support frame, 11 is a paper ejection roller, 1
2 is a seat, 15 is a driving blade, and 16 is a biasing blade.

Claims (1)

[Claims] In a sheet cutting device comprising a pair of blades and a support member that supports these blades, a conveyance means for feeding the sheet and a guide means for guiding the sheet are each integrally attached to the support member. A sheet cutting device characterized by: