JPH02190295A - Cutter drive control method - Google Patents

Abstract

PURPOSE:To shorten a time required for one cycle of cutting and to perform rapid cutting of a recording sheet by a method wherein the number of revolutions of a motor for driving a cutter during a time between completion of cutting of a recording sheet and a return to a waiting state is increased to a value higher than that during cutting. CONSTITUTION:The number of revolutions of a motor 61 for driving a moving blade 26a during a time between completion of cutting of a recording sheet 21 and return to a waiting state is increased to a value higher than that during cutting by moving and fixed blades 26a and 26b in association with each other. This method enables shortening of a time required for cutting of the cutting sheet 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive control method for a cutter that cuts recording paper provided in a recording apparatus such as a facsimile machine.

[Background of the Invention] In a recording device such as a facsimile machine, incoming call information and the like are recorded on a roll of recording paper, and the recorded portion is then cut off with a cutter.

Figure 3 shows the configuration of -151 of the facsimile machine.

In the figure, an optical reading means 10 for an original 19 and a recording means 20 for recording received image data on a recording paper 21 are housed in a rectangular parallelepiped-shaped housing (main body) 2.

At the top of the housing 2, in the illustrated example, a document table 3 is provided that projects from the upper right to the lower left. Unless otherwise specified, these sheets (referred to as "original 19J") are fed to the optical reading means 10 side.

The document 19 is fed downward by the feed roller 4. Then, before reaching the paper discharge rollers 5 and 6, the type of paper is determined and the document image is read.

Therefore, the feeding roller 4 and the pair of paper ejection rollers 5.6
A light fill such as a fluorescent lamp is installed between the
+t is irradiated onto the document surface. The reflected light (optical image information) thus obtained is imaged on the image reading element 15 via a pair of mirrors 12 and 13 arranged on the bottom side of the housing 2 and the lens system 14. This image reading element 1
At 5, the optical image information is converted into an electrical signal (image signal). Picture l#! The signal is written into a memory or sent to a communication line via an image processing system (not shown).

As the image reading element 15, a line sensor consisting of a charge transfer element such as a CCD or the like is used. 17 is a substrate into which the image reading element 15 can be attached.

The original 19 is conveyed downward at a predetermined speed, and in the illustrated example, image information is read line by line and sequentially converted into image signals.

The document fed out at a predetermined speed is passed through a pair of paper ejection rollers 5.6.
The document is held between the document trays 2 and 3, and is ejected from the front bottom side of the housing 2 to a tray (not shown) for document receiving.

The recording means 20 is a means for reproducing the information as a visible image on the recording paper 21 based on the received image signal or image signal for copying. The recording means 20 is provided above the rear of the housing 2.

Therefore, a recording paper 21 wound around a paper tube 29 is rotatably provided in the center of the casing I$2.
The leading end of the platen is guided by the guide means 50 and sent out to the platen roller 22I11. The guide means 50 includes a pair of upper and lower guide plates 51.
It consists of 52 pieces.

On the upper surface of the platen roller 22, this platen roller 2
A recording head 23 is arranged so as to be in sliding contact with the outer peripheral surface of the recording head 2 . As the recording head 23, a thermal head or the like having a plurality of head elements arranged in a line is used.

Therefore, when the recording paper 21 that has been conveyed to the upper surface of the platen roller 22 passes the recording head 23, one-word image information and the like are recorded thereon.

When the recording paper 21 on which image information has been recorded is conveyed for a predetermined length, the automatic cutter device 24 is driven and the rear end of the recording paper 21 is automatically cut. The automatic cutter device 24 is composed of a movable cutting blade 26a, a fixed blade 2 (3b), and a driving means (not shown in FIG. 3) for moving the blade up and down.

The cut recording paper 2I is discharged onto a paper discharge tray 25 attached to the rear of the housing 2.

FIG. 4 shows the configuration of the automatic cutter 8ii 24. As shown in FIG.

In the figure, 61 is a motor, and 62 is a pinion gear fixed to the rotating shaft of the motor 61. Further, 63 is a cutter drive gear, and this cutter drive gear 63 is disposed in a meshed state with the pinion gear 62.

Reference numeral 64 designates a cutter drive lever, and one end of this cutter drive bar 64 is rotatably fixed with a shaft 65 to the outer peripheral surface of the end face perpendicular to the teeth of the cutter drive gear 63. The protruding end side is rotatably connected to one end side of a cutter drive arm 67 with a shaft 66.

The other end of the cutter drive arm 67 is rotatably fixed to a shaft 68 fixed to the housing 2 (not shown in FIG. 4). A movable blade 26a is fixed to the other end of the cutter drive arm 67.

In the above configuration, when cutting the recording paper 21, the motor 61 is rotated, and as a result, the movable blade 26a is rotationally driven around the shaft 68 as shown in FIG. 4A-C to cut the recording paper 21. 21 cuts are made once. In this case, since the cutter drive gear 63 rotates once in one cycle of operation, this one rotation is detected by a home position detecting means (not shown in FIG. 4), which includes, for example, a photo interrupter. As a result, the rotation of the motor 61 is stopped and the operation is completed.

4A shows the state when cutting is started, FIG. 4B shows the state when cutting is finished, and FIG. 4C shows the standby state, and the broken line P shows the locus of movement of the shaft 66.

[The invention attempts to solve i! Conventionally, when cutting the recording paper 21 with such a configuration, the rotation speed of the motor 61 during one cycle is constant except for the rising period and the falling period, as shown in FIG. has been done.

Here, the relationship between the rotational speed and the torque of the motor 61 is inversely proportional, as shown in FIG. 6, for example, and the higher the rotational speed, the lower the torque. The rotation speed of the motor 61 mentioned above is the rotation speed n at which the torque Tl required for cutting is obtained.
1, this rotational speed n1 is relatively low.

As described above, in the conventional art, the rotational speed of the motor 61 is relatively low and constant from the start of cutting to the standby state, which has the disadvantage of increasing the time required for one cycle of cutting.

By the way, it is clear that the torque required for the period from the end of cutting to the return to the standby state may be lower than the torque required at the time of cutting.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a cutter drive control method that can shorten the time required for one cycle of cutting and quickly perform cutting.

[Means for Solving the Problems] The present invention includes a cutter for cutting recording paper, a motor for driving the cutter, and a control means for controlling this motor, and the device is set in a standby state after cutting the recording paper. The number of revolutions of the motor before returning is higher than the number of revolutions during cutting.

[Function] In the above-mentioned configuration, the number of revolutions of the motor 61 from the end of cutting the recording paper 21 until returning to the standby state is made higher than the number of revolutions during cutting, and the time required for one cycle of cutting is shortened. It is possible. In this case, if the rotation speed of the motor 61 is lowered, the torque will be lowered, but the torque required for the period from the end of cutting to the return to the machine state for 1 second may be lower than the torque required for cutting, so there is no problem.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

In this example, as the motor 61, for example, the recording paper 21
A stepper motor is used to send the . This stepping motor can be digitally controlled, and the relationship between its rotational speed and torque is inversely proportional as shown in FIG. 6, and the higher the rotational speed, the lower the torque.

In this example, as shown in FIGS. 1 and 2, the motor 61 operates from the cutting start state (shown in FIG. 4A) to the cutting end state (shown in FIG. 4B). The number of revolutions is 0 at which the torque T1 required for cutting is obtained.
The rotation speed of the motor 61 from the cutting end state (shown in FIG. 4B) to the first cut state (shown in FIG. 4C) is such that the torque T2 required for return is The rotation speed is controlled to be 02 which can be obtained. Here, Ill<n2, TI>T20 function 1 system.

In this way, in this example, the number of revolutions of the motor 61 from the time the recording paper 21 ends to the time it returns to the standby state is set higher than the number of revolutions during cutting, so the time required for one cycle of cutting can be shortened. . Thereby, according to this example, the recording paper 21 can be cut quickly.

In the above embodiment, a stepping motor is used as the motor 61, but it goes without saying that the present invention can be similarly applied to other motors that can be controlled in speed.

[Effects of the Invention] As explained above, according to the present invention, the number of revolutions of the motor from the end of cutting the recording paper to the time it returns to the standby state is made higher than the number of revolutions during cutting, and The time required for the cycle can be shortened, and recording paper can be cut quickly.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams for explaining the present invention, and FIG.
4 is a block diagram of a facsimile machine, FIG. 4 is a block diagram of an automatic cutter device, and FIG. 5 is a t! 1.
FIG. 6 is a diagram showing the relationship between motor rotation speed and torque. 21...Recording paper 24...Automatic cutter device 26a...Movable blade 26b...Fixed blade 61/fist φ motor Fig. 1 Cutting operation! Motor torque during cycle Diagram 2 Cutting operation! Motor rotation speed during cycle Figure 5 Relationship between rotation speed and torque Figure 6

Claims (1)

[Claims] (1) A cutter for cutting the recording paper, a motor for driving the cutter, and a control means for controlling the motor, the number of rotations of the motor from cutting the recording paper to returning to the standby state, A cutter drive control method characterized by increasing the number of rotations higher than that during cutting.