JPH0626682B2 - Document cutting machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document cutting machine, and more particularly, to an automatic paper feeding device for automatically feeding paper or a document to be cut to a cutting cutter roller, for example. Document cutting machine.

(Description of the Prior Art) This type of document cutting machine is disclosed in, for example, Japanese Utility Model Laid-Open No. 54-3619
No. 2 or JP-A-58-216747.

(Problems to be Solved by the Invention) In the above-mentioned prior art, since one motor is used for driving the automatic paper feeding device and the cutting machine (roller), the automatic paper feeding is performed when the start switch of the motor is turned on. The device and the cutter will be activated at the same time. in this case,
Paper may be fed before the roller reaches the number of rotations required for cutting, and the roller may catch the paper, making it impossible to cut.

Therefore, a main object of the present invention is to provide a document cutting device that does not cause uncutability at the time of startup even if the automatic sheet feeding device and the cutting device are simultaneously activated.

(Means for Solving Problems) The present invention relates to a document cutting device including a paper feeding device for automatically feeding paper to be cut, and a cutting device for cutting the paper fed from the paper feeding device. In the machine, in order to enable the cutting means to be in use by the time the first sheet of paper supplied from the paper feeding means reaches the cutting means,
The document cutting machine is provided with a speed changing unit that makes the supply speed of the first sheet of paper slower than the steady speed.

(Operation) The supply speed of the first sheet is made lower than the steady speed by the speed changing means. Even if the sheet feeding means and the cutting means are activated at the same time, when the first sheet of paper is sent from the sheet feeding means to the cutting means, the feeding speed of the first sheet of paper is slow. The means is fully up and has reached a steady torque. Therefore, even at the time of startup, the inability to cut by the cutting means does not occur.

(Effect of the Invention) According to the present invention, since the first sheet of paper supplied from the sheet feeding means is made slower than the steady speed by the speed changing means, cutting is performed when the first sheet of paper is supplied. Since the means has sufficiently risen to reach the steady torque, there is no problem that the first document or paper is not completely cut as in the conventional case.

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

(Embodiment) The document cutting machine 10 shown in FIGS. 1 and 2 includes a cutting unit 12, a paper feeding unit 14, and a container unit 16. These units 12, 14 and 16 are
As can be seen clearly, they are individually separable and can be assembled in use as an integrated document cutter 10.

An input port 18 for inputting a document or paper to be cut is formed on the upper surface of the cutting unit 12. In the housing of the cutting unit 12, as shown in FIG. 1, a pair of cutter rollers 2 are provided so that the paper input from the input port 18 can be cut and the cut paper can be dropped downward.
0a and 20b are stored. Each of the cutter rollers 20a and 20b has a plurality of concave and convex blades extending in the circumferential direction on the circumferential side surfaces thereof in parallel to the width direction of the rollers. The blades of the two cutter rollers 20a and 20b mesh with each other, and the paper loaded from the loading port 18 is
It is cut or cut along the traveling direction of the paper.

The paper waste cut by the meshing of the cutter rollers 20a and 20b is dropped downward through the discharge port 22 formed therebelow.

One of the cutter rollers 20a and 20b is driven by a cutter motor 50 (Fig. 3).

Paper feeding unit 14 mounted on the cutting unit 12
Automatically supplies the sheets to be cut one by one to the cutting unit 12, that is, the cutter rollers 20a and 20b.

The paper feeding unit 14 includes a pedestal 24 for holding the sheets of paper 26 to be cut in a laminated or stacked manner. An arm 30 is rotatably supported by a shaft 28 at a predetermined position in front of the pedestal 24. A paper feed roller 32 is attached to the free end of the arm 30 so as to be rotatable clockwise. The paper feed roller 32 is rotationally driven by a paper feed motor (not shown). Therefore, the paper feed roller 3
When the paper 2 comes into contact with the top of the paper 26 deposited on the pedestal 24 by its own weight and the paper feed roller 32 is rotated clockwise in that state, the paper is taken in.

The paper thus taken in is fed by the double feed prevention roller 34.
a and 34b. One of the double feed preventing rollers 34a is rotated in the same clockwise direction as the paper feeding roller 32, and the other roller 34b is rotated in the same clockwise direction with its outer peripheral surface in contact with the outer peripheral surface of the roller 34a. Due to the action of the roller 34b, the double feed prevention rollers 34a and 34b prevent the paper feed roller 32 from feeding two or more sheets in an overlapping state, and feed the sheets one by one. Therefore, it is possible to reduce the torque of the above-mentioned cutter rollers 20a and 20b, that is, the cutter motor 50.

The paper fed through the double feed prevention rollers 34 a and 34 b is brought to the conveyance path 36. The transport path 36 is curved in a substantially U-shape, and a paper discharge port 36a formed by inputting the leading end thereof is formed.
Engages or fits into the input port 18 of the cutting unit 12 described above. Therefore, the multi-feed preventing rollers 34a and 3
The paper 26 sent out from the 4b one by one is the cutting unit 12
Is supplied to.

Further, an opening or a slit is formed in the middle of the transport path 36, and this slit together with the inclined surface 40,
The manual feed port 38 is configured. That is, when paper is supplied without automatic paper feeding, if the paper is manually inserted into the manual feed port 38 or dropped, the paper will be ejected through the paper ejection port 36a and the same as in the case of automatic paper feeding. It is fed through the mouth 18 to the cutter rollers 20a and 20b. Therefore, the paper feed unit 14 of this embodiment can use both automatic paper feed and manual paper feed.

The paper waste finely cut by the cutter rollers 20a and 20b is discharged from the above-described discharge port 22 to the container unit 16
Is dropped into the container. If the container unit 16 is equipped with a packing device, the waste paper will be packed.

Referring to FIG. 3, a microcomputer 42 is provided to control the overall functions of the document cutting machine 10. A key operation signal from a start key 44 and a stop key 46, which are not shown in FIGS. 1 and 2, is given to the microcomputer 42 through an input port.

A motor driver 48 is connected to the output port of the microcomputer 42, and the motor driver 48 has
The cutter motor 50 and the paper feed motor 52 are connected.
Therefore, both of these two motors 50 and 52 are controlled by the microcomputer 42 in terms of start and stop, speed, and direction of rotation.

With reference to FIG. 1 to FIG. 3, the operation or operation of the basic example which is the premise of the present invention will be described based on FIG.

When the power switch (not shown) is turned on, the microcomputer 42 first performs the first step S shown in FIG.
In step 1, initialization is performed, and when the initialization is completed, it is determined in the next step S3 whether there is a start signal. This start signal is the start key 4 described above.
It is input by turning on 6. Therefore,
When the start key 46 is turned on, the microcomputer 42 outputs a drive signal to the motor driver 48 so as to turn on the cutter motor 50 and the paper feeding motor 52 at the same time in subsequent steps S5 and S7.

Therefore, the paper feed roller 32 starts to rotate, and the paper feed roller 32 takes in the papers 26 to be cut one by one on the pedestal 24, and passes through the double feed prevention rollers 34a and 34b into the conveyance path 36. Sent in.

In this way, it takes time t before the first paper is fed from the paper feeding unit 16 to the positions of the cutter rollers 20a and 20b.

On the other hand, the cutter motor 50 has a rising characteristic as shown in FIG. The cutter motor 50 cannot obtain the steady-state torque T ₀ until the time t ₀ elapses from its activation.
In other words, at startup, the cutter rollers 20a and 20a
0b cannot exhibit a sufficient cutting force until the time t _{0 has} elapsed from the start of the cutter motor 50.

Therefore, in the document cutting machine 10 shown in FIGS. 1 and 2, the sheet feeding unit 14, that is, the sheet feeding roller 32, and the cutting unit 12, that is, the cutter rollers 20a and 20b.
A physical distance greater than or equal to a certain distance is provided by the transfer path 36. The physical interval is set so that the above-mentioned times t and t ₀ satisfy t ≧ t ₀ . In order to set such a relationship, it is necessary to know the paper feeding speed of the paper feeding unit 14, and if the speed is V, the interval D is given by D ≧ t ₀ × V.

If such an interval D is set, the cutter motor 50 has already risen sufficiently to obtain the predetermined torque T ₀ at the timing when the first sheet arrives from the sheet feeding unit 14, and therefore the first sheet is Even with paper, the cutter roller 20
It can be completely cut by a and 20b.

Then, in step S9, it is determined whether or not there is a stop signal. This stop signal is input by turning on the stop key 44 described above. Therefore, when the stop key 44 is turned on, the microcomputer 42 outputs a stop signal to the motor driver 48 so as to turn off the cutter motor 50 and the paper feed motor 52 in subsequent steps S11 and S13. This completes a series of operations.

As described above, it has been found that the first sheet of paper can be completely cut by the cutter rollers 20a and 20b by forming a constant space between the paper feeding unit 14 and the cutting unit 12. However, there are cases where such a distance cannot be maintained due to the configuration.

Next, in such a case, how to apply a sufficient cutting force to the cutter rollers 20a and 20b from the first sheet will be described.

Briefly, in this case, the speed at which the first sheet of paper is conveyed from the paper feeding unit 14 to the cutter rollers 20a and 20b is made sufficiently slower than the speed of conveying the paper thereafter, and the necessary amount is obtained. Secure the rise time. For that purpose,
In this embodiment, as shown in FIG. 1, a paper sensor 35 is provided on the downstream side of the double feed prevention rollers 34a and 34b. The output of the paper sensor 35 is input to the microcomputer 42 as shown in FIG. Then, each time the microcomputer 42 receives the output of the paper sensor 35, it increments the number counter assigned to a predetermined area in the RAM (not shown).

Referring to FIG. 6, in steps S101 and S103, the initial setting and the presence / absence of a start signal are confirmed in the same manner as steps S1 and S3 in FIG.

In the next step S105, the microcomputer 42 refers to the sheet number counter in the RAM described above and determines whether the sheet is the first sheet.

When it is detected that the sheet is the first sheet, the microcomputer 42 causes the motor driver 48 to rotate the sheet feeding motor 52 at a first speed V ₁ slower than the steady state in step S107a. Give speed data to set to. If it is not the first sheet of paper, that is,
If it is the second and subsequent sheets of paper, the microcomputer 42
In step S107b, the motor driver 48
, The speed data for setting the rotation speed of the paper feed motor 52 to the second speed V ₂ which is the steady state is given.

The difference in speed as described above is the same as in the previous embodiment.
Considering the rising time required for the cutter motor 50,
It is determined. That is, it takes time t until the first sheet of paper is sent from the paper feeding unit 14 to the positions of the cutter rollers 20a and 20b, and the cutter motor 50 does not exceed the steady torque until the time t ₀ elapses from its activation. If T ₀ cannot be obtained, V ₁ <V ₂ such that t ₀ ≦ t
Therefore, the first speed V ₁ and the second speed V ₂ are set.

Then, in step S109, the microcomputer 42 gives a signal to the motor driver 48 so as to turn on both the cutter motor 50 and the paper feed motor 52 at the same time. Even if the cutter motor 50 and the paper feed motor 52 are simultaneously activated, in the case of the first sheet of paper, the speed of the paper feed motor 52 is set low, so that the first sheet of paper is fed to the paper feed unit 14. From cutter roller 20a
The cutter motor 50 has already risen sufficiently by the time it is sent to positions 20 and 20b. Therefore, also in this embodiment, the first sheet of paper can be completely cut, as in the previous embodiments.

After that, the same steps S111, S113 and S115 as the steps S9, S11 and S13 of FIG. 4 are executed and the process is ended.

In the above-described embodiment, the cutter rollers 20a and 20a are
The cutter motor 50 that drives 0b and the sheet feeding motor 52 that drives the sheet feeding roller 32 are separately provided. However, the cutter rollers 20a and 20b and the paper feed roller 3
A common drive system for commonly driving the two may be used.
In this case, when the unit is formed as in the embodiment, it is necessary to provide a power transmission means such as a gear or a belt and a pulley that can be separated and assembled.

Further, in the embodiment shown in FIG. 6 described above, different speed data is given from the microcomputer 42 to the motor driver 48 as speed changing means.
The paper feed motor 52 is a DC motor or stepping motor that rotates at a speed according to the speed data. However, the speed changing means may have any configuration such as a combination of gears and pulleys or switching with a clutch or the like.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic view showing an embodiment of the present invention. FIG. 2 is an external view showing a state in which each unit of FIG. 1 embodiment is disassembled. FIG. 3 is a block diagram showing the configuration of this embodiment. FIG. 4 is a flow chart showing the operation of the basic example which is the premise of the present invention. FIG. 5 is a graph showing the rising characteristics of the cutter motor. FIG. 6 is a flow chart showing the operation of the embodiment of the present invention. In the figure, 10 is a document cutting machine, 12 is a cutting unit,
14 is a paper feeding unit, 20a and 20b are cutter rollers, 32 is a paper feeding roller, 35 is a paper sensor, 42 is a microcomputer, 48 is a motor driver, 50 is a cutter motor, and 52 is a paper feeding motor.

Claims (2)

[Claims] 1. A document cutting machine comprising a paper feeding means for automatically feeding paper to be cut, and a cutting means for cutting the paper fed from the paper feeding means. A speed at which the feeding speed of the first sheet of paper by the paper feeding means is made slower than a steady speed in order to make the cutting means ready for use by the time the first sheet of paper supplied reaches the cutting means. A document cutting machine comprising a changing unit. 2. The speed changing means has a first speed when the first sheet of paper is supplied and a second speed which is faster than the first speed when subsequent papers are supplied. Claim 1 including means for driving said paper feeding means
Document cutting machine described in paragraph.