JP3480126B2 - Cutting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device provided in a facsimile machine or the like on which roll paper is mounted and capable of cutting the roll paper at a predetermined position.

[0002]

2. Description of the Related Art Conventionally, a facsimile apparatus that uses roll paper as recording paper is provided with a cutting device that cuts the roll paper at a predetermined position. This cutting device is shown in FIG.
As shown in FIG. 3, an upper blade body 1 having a linear blade 1a and rotatable about a support shaft 3 tilted at a predetermined angle with respect to a conveyance surface of a sheet 9 and a linear blade 5a are provided. A cutting mechanism having a lower blade body 5 rotatable about an axis parallel to the conveyance surface of the sheet 9, and a motor (not shown) serving as a power source of this cutting mechanism is controlled by the CPU. By transmitting the driving force of the upper blade 1 to the lever 7 and rotating the upper blade 1 as shown by the arrow A, the contact points of the upper blade 1 and the lower blade 5 are sequentially changed from the right to the left in the figure. It is possible to cut the paper 9 by sliding the paper 9 so that the paper 9 moves.

[0003]

By the way, in the above cutting device, even if the motor is driven at an excessively high speed, the driving torque is insufficient and the roll paper cannot be cut well. Therefore, conventionally, the motor has been driven at a speed at which the drive torque required for the cutting operation can be secured.

However, according to the prior art, when the same motor is used, the cutting mechanism that requires a large driving torque is forced to drive the motor at a lower speed, so that the response of the cutting operation becomes worse. There was a problem. Further, in order to prevent the response of the cutting operation from being deteriorated, it was possible to adopt a higher performance motor that generates sufficient torque even at high speed, but in that case, it causes an increase in manufacturing cost. There was a problem.

Therefore, an object of the present invention is to provide a cutting device which can improve the response of the cutting operation more than ever before without changing the motor.

[0006]

Means for Solving the Problems, Actions and Effects In order to achieve the above-mentioned object, the present invention provides a linear first blade body operable by a driving force of a motor according to claim 1. And a linear second blade body capable of contacting the first blade body, and contact points of the first blade body and the second blade body in order from one end of the blade body to the other end. In the cutting device that cuts the fed roll paper at a predetermined position by sliding the blade bodies so as to move, the cutting of the roll paper is completed after the operation of the first blade body by the motor is started. The first blade by the motor within the period until
After the operation of the body is started, the first blade body contacts the roll paper.
Until the time when the touch is started to start the cutting, the motor is controlled to be driven at a high speed , and at the time when the first blade comes into contact with the roll paper to start the cutting, the motor is driven at a low speed. To drive and at the same time set to low speed to drive.
From the time after the movement to the time when the cutting of the roll paper is completed, the motor speed changing means is provided for performing control to gradually accelerate and set to high speed.

In the cutting device according to the present invention, the motor speed changing means is arranged so that after the operation of the first blade body by the motor is started,
During the period until the cutting of the roll paper is completed, at the time when the first blade comes into contact with the roll paper and starts cutting, control is performed to drive the motor at a low speed. Here, the time when the first blade comes into contact with the roll paper and starts the cutting is set in advance as a relative time from the time when the motor is driven depending on the specific shape of the cutting mechanism and the performance of the motor. Can be specified.
The low speed referred to here is a rotational speed that generates a driving torque necessary to start cutting the roll paper, and the cutting of the roll paper is started by driving the motor at such a low speed. On the other hand, after the start of cutting, the motor speed changing means
It controls to drive the motor at high speed by gradually accelerating until the cutting of the roll paper is completed. The high speed referred to here is a rotation speed that generates a driving torque necessary for continuing the cutting operation, and means that it is higher than the low speed. That is, since the drive torque required to continue the cutting operation is smaller than the drive torque required to start the cutting operation, the drive torque is lower than that at the start of the cutting operation as long as it does not hinder the continuation of the cutting operation. However, the driving speed of the motor can be correspondingly increased. When the motor is driven at such a high speed, the cutting operation is completed more quickly than when the motor is continuously driven at a low speed. Therefore, according to the present cutting device, the response of the cutting operation becomes good. Further, in the cutting device of the present invention, the motor speed changing unit causes the first blade body to roll the roll paper within a period from the start of the operation of the first blade body by the motor to the completion of the cutting of the roll paper. Until it contacts with, it also controls to drive the motor at high speed. Therefore, the time from the start of driving the motor to the contact of the first blade with the roll paper is also shortened,
The response of the cutting operation can be further improved. Further, in the cutting apparatus of the present invention, after starting the cutting of the roll paper, the rolling paper is gradually accelerated until the cutting of the roll paper is completed, so that the load applied to the motor does not increase sharply and the cutting is performed more smoothly. The action can be performed.

By the way, although it is considered that various motors can be used to configure the cutting device of the present invention, for example, as described in claim 2, the motor is a stepping motor and the motor speed changing means. Performs a control in which the number of pulses applied to the stepping motor per unit time is relatively small at the time point when the blade body comes into contact with the roll paper to start cutting, and thereafter is relatively increased. Good.

According to the cutting device having the above-described structure, the motor speed changing means, when performing the change control of the drive speed,
Since it suffices to change the number of pulses (hereinafter, also referred to as a pulse rate) given to the stepping motor per unit time, it is possible to change the drive speed with a relatively easy control and appropriately control the drive amount. When a stepping motor is used, when the time when the first blade comes into contact with the roll paper to start cutting is specified, if the number of pulses given to the stepping motor is counted, the motor drive start time It is not necessary to actually measure the relative time from. Well
In addition, for example, as described in claim 3,
The first blade is the roll paper after the operation of the first blade is started.
The speed set up until the point of contact with the start of cutting
Depending on the degree, the speed set when the roll paper is completely cut
The degree may be higher.

[0010]

[0011]

[0012]

[0013]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the facsimile apparatus 11 according to the present exemplary embodiment is in contact with the roll paper tray 13 that stores the roll paper 12 for thermal recording and the roll paper 12 that is pulled out from the roll paper tray 13 to make the roll paper 12 Curl removing unit 15 for removing the curl of the paper, the thermal recording head 16 and the platen 17 arranged at a position for sandwiching the roll paper 12, and the roll paper 1 on which recording is finished by heating by the thermal recording head 16.
2 is provided with a cutting mechanism 18 that operates when it is sent to a predetermined position and cuts the roll paper 12. In addition,
The cutting mechanism 18 has the same structure as that shown in FIG. 1, and therefore its explanation is omitted here.

Further, as shown in FIG. 3, the control system of the facsimile device 11 is a CPU for controlling the operation of each part of the device.
21, a ROM 22 in which a control program executed by the CPU 21, various data, and the like are stored; a RAM 23 for temporarily storing various data during operation execution; and a recording unit for performing thermal transfer recording by the thermal recording head 16. 24
A well-known image scanner 25 that scans an original to read an image, an operation panel 27 for a user to specify various functions and perform various operations, and a liquid crystal display 28 (LCD 28) for displaying various messages. To drive a network control unit 29 (NCU 29) for transmitting and receiving a facsimile signal to and from another facsimile apparatus via a telephone line, a modem 31, and a stepping motor 33 serving as a power source of the cutting mechanism 18. Drive control circuit 35, which are connected to each other via a bus 37.

In the facsimile apparatus configured as described above, the operation of each section is controlled by the CPU 21. The basic operation is the same as that of the conventional facsimile machine. However, in brief, when transmitting a document, the image data of the document image read by the image scanner 25 is encoded and modulated by the modem 31. , From the NCU 29 to another facsimile machine via the telephone line. When receiving a document, the NCU 29 receives a signal transmitted from another facsimile device via a telephone line, demodulates it with a modem 31, and records it based on the image data obtained by decoding. An image is recorded on the roll paper 12 by the unit 24. Further, when copying a document, the recording unit 24 records the image on the roll paper 12 based on the image data of the document image read by the image scanner 25.

When a recording operation is performed on the roll paper 12 at the time of receiving a facsimile original, copying the original, or the like, the CPU 21 executes the control for sending out a predetermined amount of the roll paper 12 each time the stepping motor 33 is operated. Is controlled to operate the cutting mechanism 18 to cut the roll paper 12 at a predetermined position.

Next, the operation control process for the cutting mechanism 18 will be described with reference to FIG. In this process, first, the pulse rate P is set to 20 as the initial value.
0 is set (S10), and the stepping motor 33 is driven at the pulse rate P (S20). The drive time in S20 is adjusted according to the time required from the start of driving the motor to the start of cutting the roll paper by the cutting mechanism 18.

Next, the pulse rate P is set to 100 (S30), and the stepping motor 33 is set to the pulse rate P.
Drive (S40). As a result, the stepping motor 33 generates the driving torque required to start the cutting operation of the cutting mechanism 18, and the cutting mechanism 18 starts the operation.

Next, 10 is added to the pulse rate P (S5
0), if the pulse rate P does not exceed 400 (S60: YES), the process returns to S40. As a result, the stepping motor 33 gradually accelerates from a pulse rate of 100 pps, and finally reaches a pulse rate of 400 pps.
Is accelerated up to. Then, in S60, if the pulse rate P exceeds 400 (S60: NO), this processing ends. The time taken from the start to the end of S30 to S60 is adjusted according to the time taken from the start to the completion of cutting the roll paper by the cutting mechanism 18.

According to the facsimile apparatus 11 described above, when the roll paper 12 is cut, the cutting operation in the cutting mechanism 18 is completed promptly as compared with the case where the stepping motor 33 is continuously driven at the pulse rate of 100 pps. To do. Also, gradually increase the pulse rate to 400pp
Since it reaches s, the pulse rate is 400 from the beginning.
Unlike the case of driving at pps, the problem of insufficient driving torque does not occur. Therefore, according to the present facsimile apparatus 11, the response of the operation of cutting the roll paper 12 is extremely good.

In particular, since the stepping motor 33 is used as the power source of the cutting mechanism 18, the drive speed can be changed with a relatively easy control, and the drive amount can be appropriately controlled.
Further, in changing the pulse rate, the control for gradually increasing the pulse rate is performed, so that the cutting operation can be smoothly performed.

In addition, the control for increasing the driving speed of the motor is also performed until just before the start of cutting the roll paper 12, so that the response of the cutting operation in the facsimile apparatus 11 is particularly good. Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modes can be adopted without departing from the scope of the present invention.

For example, although the facsimile apparatus is shown in the embodiment, the present invention is not limited to this, and the present invention can be applied to an apparatus that uses roll paper as recording paper. In particular,
In a device having a recording device such as a word processor and a printer, if roll paper is used, the present invention can be applied.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cutting mechanism provided in a facsimile apparatus.

FIG. 2 is a vertical cross-sectional view showing a schematic structure of the facsimile apparatus of the embodiment.

FIG. 3 is a block diagram showing a control system of the facsimile apparatus of the embodiment.

FIG. 4 is a flowchart of a roll paper cutting process.

[Explanation of symbols]

1 ... upper blade, 3 ... spindle, 5 ... lower blade,
7 ... Lever, 9 ... Paper, 11 ... Facsimile device, 12 ... Roll paper, 13 ... Roll paper tray, 15 ... Curl removing unit, 16 ... Thermal recording head, 17 ... Platen, 18 ... Cutting mechanism, 21 ... CPU, 2
2 ... ROM, 23 ... RAM, 24 ... recording unit, 25 ... image scanner, 27 ... operation panel, 28 ... liquid crystal display, 29 ... network control unit, 31 ... ... Modem, 33 ... Stepping motor, 35 ... Drive control circuit, 37 ... Bus.

Claims (3)

(57) [Claims] 1. A linear first blade body operable via a driving force of a motor, and a linear second blade body capable of contacting with the first blade body.
A blade body, and a contact point between the first blade body and the second blade body,
In the cutting device for cutting the fed roll paper at a predetermined position by sliding the blade bodies so as to sequentially move from one end to the other end of the blade body, the operation of the first blade body by the motor is performed. from the start, of the period until the cutting of the roll paper is completed, the motor
The first blade body after the operation of the first blade body by the cutter is started.
Until it touches the roll paper and starts cutting,
Performs control to drive by setting the motor speed, together with the first blade body at the time to start the cutting contact with the rolled paper, is driven by setting the motor to a low speed, the
The roll paper is completely cut after driving at a low speed.
Until then, the cutting device is provided with a motor speed changing means for performing a control of gradually accelerating and setting a high speed. 2. The cutting device according to claim 1, wherein the motor is a stepping motor, and the motor speed changing unit causes the blade body to roll the number of pulses given to the stepping motor per unit time. The cutting device is characterized in that it is relatively small at the time of starting the cutting by contacting with the cutting device, and is controlled to be relatively increased thereafter. 3. The cutting device according to claim 1 or 2, After the operation of the first blade body by the motor is started,
Until the first blade contacts the roll paper and starts cutting
Cutting of the roll paper is completed at the speed set during
Cutting characterized by a higher speed set at time
apparatus.