JPH0335979B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a document cutting machine, and particularly to a document cutting machine having an automatic paper feeding device that automatically feeds paper or documents to be cut to a cutting cutter roller, for example. Regarding cutting machines.

(Description of Prior Art) This type of document cutting machine
This is disclosed in Publication No. 36192, etc.

(Problems to be Solved by the Invention) In the above conventional technology, one motor is used to drive the feed roller and cutter blade (roller slitter) of the automatic paper feeder, so when the motor start switch is turned on, The feed roller and roller slitter will be activated at the same time. In this case, the paper may be fed before the roller slitter reaches the rotational speed necessary for cutting, and the roller slitter may get caught in the paper, making it impossible to cut the paper.

Further, even if the automatic sheet feeding device and the cutting machine are activated by separate activation switches, the same problem as described above will occur if the automatic sheet feeding device is activated before the cutting machine.

Therefore, the main object of the present invention is to provide a document cutting machine that can perform complete cutting even when started up.

(Means for Solving the Problems) Simply put, the present invention provides a paper feeding means for automatically supplying paper to be cut, and a cutting means for cutting paper supplied from the paper feeding means. and a time difference activation means for activating the paper feeding means a predetermined time after the cutting means is activated.

(Function) When the power switch is turned on and a start key is operated, for example, the cutting means is started. The time difference activation means then activates the paper feeding means a predetermined time after activation of the cutting means. Therefore, when the first sheet of paper is fed by the paper feeding means, the cutting means has sufficient cutting power.

(Effects of the Invention) According to the present invention, the cutting means is sufficiently started up before the first sheet of paper begins to be supplied to the cutting means, so that unlike conventional methods, the cutting means is fully activated. The problem of incomplete cutting does not arise. Therefore, according to the present invention, the inconvenience of important documents being discarded in a restorable state can be completely eliminated.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

(Embodiment) FIGS. 1 and 2 are structural diagrams showing an embodiment of the present invention. Document cutting machine 10 includes a cutting unit 12, a paper feed unit 14, and a container unit 16. These units 12, 14 and 16, as best seen in FIG. 2, are designed to be individually separable and assembled into an integrated document cutter 10 for use.

An input port 18 is formed on the top surface of the cutting unit 12, into which documents or papers to be cut are input. As shown in FIG. 1, a pair of cutter rollers 20a and 2 are provided in the housing of the cutting unit 12 to cut paper input from the input port 18 and allow the cut paper to fall downward.
0b is stored. Cut rollers 20a and 2
A plurality of uneven blades extending in the circumferential direction are formed on the circumferential side of each of the rollers 0b in parallel to the width direction of the roller. Then, the blades of the two cutter rollers 20a and 20b mesh with each other, and the paper input from the input port 18 is cut or shredded along the traveling direction of the paper.

Paper scraps cut by the engagement of the cutter rollers 20a and 20b are dropped downward through a discharge port 22 formed below.

Note that one of the cutter rollers 20a and 20b is driven by a cutter motor 50 (FIG. 3).

A paper feed unit 14 mounted on the cutting unit 12 feeds sheets of paper to be cut one by one to the cutting unit 12, that is, cutter rollers 20a and 20b.
automatically supplied.

The paper feed unit 14 includes a pedestal 24 for holding paper 26 to be cut in a stacked or stacked manner. At a predetermined position in front of this pedestal 24,
An arm 30 is rotatably supported by the shaft 28. A paper feed roller 32 is attached to the free end of the arm 30.
is attached so that it can rotate clockwise. This paper feed roller 32 is rotationally driven by a paper feed motor (not shown). Therefore, the paper feed roller 3
2 comes into contact with the topmost paper 26 stacked on the pedestal 24 by its own weight, and when the paper feed roller 32 is rotated clockwise in this state, that paper is taken in.

The paper thus taken in is brought to double feed prevention rollers 34a and 34b. One of the double feed prevention rollers 34a is rotated in the same clockwise direction as the paper feed roller 32, and the other roller 34b has its outer peripheral surface in contact with the outer peripheral surface of the roller 34a and is rotated in the same clockwise direction. Double feed prevention rollers 34a and 34b prevent two or more sheets of paper from being fed in an overlapping state by paper feed roller 32 by the action of roller 34b, and feed out one sheet at a time.
Therefore, the aforementioned cutter rollers 20a and 2
0b, that is, it is possible to reduce the torque of the cutter motor 50, which will be described later.

The paper fed through the double feed prevention rollers 34a and 34b is brought to the conveyance path 36. The conveyance path 36 is curved in a substantially U-shape, and the paper discharge port 36a formed at the tip thereof is connected to the above-mentioned cutting unit 1.
It engages or fits into the input port 18 of No. 2. Therefore, the sheets of paper 26 fed out one by one from the double-feed prevention rollers 34a and 34b are supplied to the cutting unit 12.

Furthermore, an opening or slit is formed in the middle of the conveyance path 36, and this slit, together with the inclined surface 40, constitutes the manual feed port 38. That is, when feeding paper without using automatic paper feeding, if the paper is manually loaded or dropped into the manual feed slot 38, the paper will be fed into the paper output slot 36a and the paper input slot as in the case of automatic paper feeding. It is sent through port 18 to cutter rollers 20a and 20b. Therefore, in the paper feeding unit 14 of this embodiment, automatic paper feeding and manual paper feeding can be used together.

The paper waste cut finely by the cutter rollers 20a and 20b is dropped into the container of the container unit 16 from the above-mentioned outlet 22. If the container unit 16 is equipped with a packing device, the waste paper will be packed.

Referring to FIG. 3, such a document cutting machine 1
A microcomputer 42 is provided to control the overall functionality of 0. This microcomputer 42 is supplied with key operation signals from a start key 44 and a stop key 46, which are not shown in FIGS. 1 and 2, through an input port.

The output port of the microcomputer 42 is
A motor driver 48 is connected, and a cutter motor 50 and a paper feed motor 52 are connected to the motor driver 48. Therefore, the microcomputer 42 controls the starting and stopping, speed, and direction of rotation of these two motors 50 and 52.

The operation of this embodiment will be described with reference to FIGS. 1 to 3 and based on FIG. 4.

When a power switch (not shown) is turned on, the microcomputer 42 first performs initial settings in the first step S1 shown in FIG. to judge. This start signal is input by turning on the start key 46 mentioned above. Therefore, when the start key 46 is turned on, the microcomputer 42 controls the motor driver 48 to turn on the cutter motor 50 in the following step S5.
Outputs a start signal to. At the same time, in this step S5, the microcomputer 42
triggers or turns on a timer allocated to a predetermined area of RAM (not shown).

After that, in step S7, when it is confirmed that the above-mentioned timer has timed up, the microcomputer 42 outputs a drive signal to the motor driver 48 to turn on the paper feed motor 52. Therefore, the paper feed roller 32 starts rotating, and the paper 26 to be cut on the pedestal 24 is taken in one by one by the paper feed roller 32, and the double feed prevention roller 34
a and 34b, and is sent into the conveyance path 36.

In this way, the first paper is transferred to paper feed unit 1.
It takes time t for the cutter to be sent from 6 to the cutter rollers 20a and 20b.

On the other hand, the cutter motor 50 has a rising characteristic as shown in FIG. That is, the cutter motor 50 cannot obtain steady torque T ₀ until time t ₀ has elapsed since its activation. In other words,
At startup, the cutter rollers 20a and 20b
cannot exert sufficient cutting power until time t ₀ has elapsed since the cutter motor 50 was started.

Therefore, in this embodiment, the cutting means, that is, the cutter rollers 20a and 20b, and the paper feeding means, that is, the paper feeding roller 32, are started with a time difference of a predetermined time _t0 using a timer. This timer time t ₀
is set so that t<t ₀ in relation to the above-mentioned time t. Then, paper feed unit 1
By the time the first sheet of paper is fed from 4, the cutter motor 50 has already started up sufficiently and has reached the predetermined torque.
T ₀ is obtained so that even the first sheet of paper can be completely cut by the cutter rollers 20a and 20b.

According to experiments conducted by the inventors, if the cutter rollers 20a and 20b rotate at, for example, 1500 rpm, sufficient torque T ₀ is reached within the first 10 rotations, so the timer time t ₀ is, for example,
Approximately 0.4 to 0.5 seconds is sufficient. However, this timer time can be arbitrarily determined.

Thereafter, in step S11, it is determined whether there is a stop signal. This stop signal is input by turning on the stop key 44 mentioned above. Therefore, when the stop key 44 is turned on, the microcomputer 42
In the following steps S13 and S15, the cutter motor 50 and paper feed motor 52 are
A stop signal is output to the motor driver 48 so as to turn off the motor at the same time. This completes the series of operations.

As mentioned above, if a time difference is provided between the startup timings of the paper feed unit 14 and the cutting unit 12,
Even for the first sheet of paper, the cutter rollers 20a and 2
It can be completely cut by 0b.

In addition, in the above-mentioned embodiment, the cutter roller 20a
and 20b, and a paper feed motor 52 that drives the paper feed roller 32 are provided separately. However, a common drive system that commonly drives the cutter rollers 20a and 20b and the paper feed roller 32 may be used. In this case, when unitizing as in the embodiment, it will be necessary to provide power transmission means such as gears, belts, and pulleys that can be separated and assembled. . Then, the transmission of the driving force to the paper feed unit 14 may be started in response to the time-up of the timer, and the paper feed unit 14 may be activated.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway illustrative view showing one embodiment of the present invention. FIG. 2 is an exploded external view of each unit of the embodiment shown in FIG. FIG. 3 is a block diagram showing the configuration of this embodiment. FIG. 4 is a flow diagram showing the operation of this embodiment. Fifth
The figure is a graph showing the start-up characteristics of the cutter motor. In the figure, 10 is a document cutting machine, 12 is a cutting unit, 14 is a paper feeding unit, 20a and 20
b is a cutter roller, 32 is a paper feed roller, 42 is a microcomputer, 48 is a motor driver, 5
0 indicates a cutter motor, and 52 indicates a paper feed motor.

Claims (1)

[Scope of Claims] 1. A paper feeding means for automatically supplying paper to be cut; a cutting means for cutting the paper supplied from the paper feeding means; A document cutting machine comprising a staggered activation means for activating said sheet feeding means after a time. 2. The document cutting machine according to claim 1, wherein the time difference activation means includes timer means for counting the elapse of a predetermined time after the cutting means is activated. 3. According to claim 1 or 2, the predetermined time is set to a time necessary for the cutting means to rise sufficiently before the first sheet of paper is fed from the paper feeding means. document cutting machine. 4. The document cutting machine according to claim 3, wherein the predetermined time is selected to be 0.5 seconds or less. 5. The document cutting machine according to any one of claims 1 to 4, wherein the paper feeding means includes means for feeding paper one sheet at a time.