JPS5856897A - Form feeding compensation circuit for drum type automatic drawing machine - 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 The present invention relates to a paper feed compensation circuit for a drum-type automatic drafting machine, and more specifically, the present invention relates to a paper feed compensation circuit for a drum-type automatic drafting machine. The present invention relates to a paper feed compensation circuit that prevents troubles caused by adhesion caused by such substances.

FIG. 1 shows an example of a drum-type automatic drafting machine to which the present invention is applied.

The drum-type automatic drafting machine shown in this figure includes a drafting drum 1 having a motor 2, and first drums arranged below both sides of the drum 1.
．． a second chamber 3 , 4 , a first paper feed drum 11 located outside the first chamber 3 and having a motor 13 , a second paper feed drum 11 located outside the second chamber 4 and having another motor 14 ; 2 paper feed citrams 12 and a motor control circuit. Then, the paper 100 is passed along the middle of its length by the drawing drum IK hook, and the first
．． Suspending in a U-shape into the second chamber 3.4, each guide roller 9. The paper is guided by lO and wound around the first and second paper feed citrams 11 and 12. Said m1. The second chamber 3.4 has an air hole 5 in the middle part in the height direction, and an exhaust hole 6 is formed in the bottom part, and each exhaust hole 6 is communicated with an exhaust pipe 7 to exhaust air. An exhaust fan 8 is provided at the end of the tube 7, and a first exhaust fan 8 is provided at the end of the pipe 7. The airflow actively flowing through the second chamber 3.4 and into the exhaust hole 6 causes the paper 10 to
1st of 0. The parts 101, 102 which are hanging down into the second chamber 3.4 can be sucked downward. The motor control circuit operates on the first paper feed drum 1.
The control system includes a control system for the first motor 13 and a control system for the motor 14 for the second paper feed drum 12. The control system for the motor 13 of the first paper feed drum 11 is configured by connecting a constant current value setting circuit 15, an adder 17, and a motor drive section 19, and controls the motor 14 of the second paper feed drum 12. The system is constructed by connecting a constant current lamp setting circuit 16, an adder 18, and a motor drive section 20. #Drawing drum 1
A rotation speed detector 22 and a rotation speed detector (not shown) are connected to the motor 2.
are connected to adders 17 and 18 of the motor control circuit.

The drum type automatic drafting machine according to the embodiment operates as follows.

That is, 1st. 2nd Teyanno (each air hole 5 of 3 and 4
From 1st. The portion of the paper 100 that hangs down in a U-shape within the first and second sections (3, 4) due to the air flow that actively flows through the interior of the second section (3, 4) and into each exhaust hole 6. 101 and 102 are sucked, and the paper 100 fits onto the drawing drum 1.

Further, as the drawing drum 1 is rotated clockwise or counterclockwise in FIG. It is input at ゜18.

In this embodiment, the first. Second paper feed citram 1
1 and 12 are rotated in the opposite direction to the rotation direction of the drawing drum 10, and when the drawing drum 1 rotates counterclockwise, the first
The paper feeding drum 11 is on the paper feeding side and the second paper feeding drum 12 is on the winding side. Conversely, when the plotting drum 10 rotates clockwise, the second paper feeding drum 12 is on the paper feeding side and the second paper feeding drum 12 is on the winding side. The paper feed drum 11 of No. 1 serves as the winding side and is interlocked.

As described above, when the rotational speed of the drawing drum 1 is detected by the rotational speed detector 22 and the output signal 23 is sent to the adders 17, 18 of the motor control circuit, each adder 17.
At 18, the current value 21 flowing from the constant current value setting circuit 15.16 and the output signal 23 sent from the rotation speed detector 22 are added, and a motor drive signal 24 is sent to the motor drive section 19.20. Through each motor drive unit 19°20, the first. motor 13 of the second paper feed drum 11.12;
14, a current proportional to the rotational speed of the drawing drum 1 is sent to the first. The second paper feed tram 11.12 is connected to the paper 1
1st of 00. The second force (lower end surface force of the portions 101 and 102 hanging within 3°4) is located in the middle of the air hole 5 and acts on these portions 101 and 102. Rotationally driven with rotational torque.

Therefore, in the drum type automatic drawing machine, the drawing drum 1
Since the rotational direction and rotational torque of the first and second paper feed trams 11 and 12 can be quickly and appropriately controlled in accordance with the rotational direction and rotational speed of the paper transport rams 11 and 12, drawing can be performed at high speed. .

However, in the drum-type automatic drawing machine, paper 100
While the feeding of the first . 2nd Teyanno (1st of 3 and 4)
The paper 100 is attached to the positions a, b, and C2d shown in the figure by adhesion forces such as static electricity and friction, and the first . The second paper feed drums 11 and 12 may be unable to feed the paper or become defective, making it impossible to slightly feed the condensed paper 100, causing trouble in drawing, or causing paper 100 to be unable to feed the first paper. The part that has come off the sprocket of the second paper feed ram 11.12,
There are four defective forces wrapped around the same side of paper 1001 and drawing drum 1.

An object of the present invention is to eliminate the drawbacks of the prior art, and to prevent
To provide a paper feed compensation circuit for a drum-type self-drawing machine that can overcome the adhesive force between the paper and the paper and reliably feed the paper.

The present invention is characterized in that, in a drum-type automatic drawing machine, a timer circuit is provided in a motor control circuit for rotating the first and second paper feed drums in accordance with the rotational direction and rotational speed of the drawing drum. ．． A timer circuit is passed through the motor drive section of the second paper feeding citram to the motor drive signal during steady operation for a certain period of time when the drawing drum is started. The present invention is configured to add a correction signal large enough to overcome the adhesive force between the second chamber and the paper, and with this configuration, the above object can be reliably achieved.

Hereinafter, the present invention will be explained based on the drawings.

FIGS. 2 and 3 show an embodiment of the present invention, and representatively show a control system for the motor 13 of the first paper feed drum 11. FIG.

As shown in FIG.
A timer circuit 25 is connected to.

This timer circuit 25 operates for a certain period of time, for example, 1 second, depending on the pulse 26 given when the drawing drum 1 is activated. An output signal 27 of a magnitude that overcomes the adhesive force between the second chambers 3 and 4 and the paper 100 is sent to the adder 17.

The adder 17 receives the current value 21 sent from the constant current value setting circuit 15 and the output signal 2 sent from the same rotation speed detector 22 provided on the motor 2 of the drawing drum 1.
The output signal 27 sent from the timer circuit 25 is added to the motor drive signal 24 during steady operation obtained by adding the signals 24 and 27, and the motor drive signal 28 obtained by adding these signals 24. The motor 1 of the first paper shortage drum 11 is sent to the drive unit 19 through the motor drive unit 19.
3, 1st. It is possible to supply a current that is the sum of the current sufficient to generate rotational torque that overcomes the adhesion force due to static electricity, friction, etc. between the second chamber 3.4 and the paper 100, and the current during steady operation. It is configured.

Therefore, when the drawing drum 1 rotates at low speed or slightly rotates when starting up, the motor 13 of the first excess paper drum 11 is supplied with the motor 9 through the motor drive section 19.

The supplied current is increased for a certain period of time, for example 1 second, and as shown in FIG.
A rotational torque T1 is given to the rotational torque T1 which is the sum of the rotational torque T during steady operation and the rotational torque T1 of a magnitude that overcomes the adhesive force between the first and second chambers 3 and 4 and the paper 100.

As a result, when the drawing drum 1 rotates at a low speed or slightly rotates when starting up, the first paper feed drum 11 rotates at the first. The adhesive force between the second chamber 3.4 and the paper 100 can be overcome and the paper 100 can be fed or wound.

Note that the paper feed compensation circuit for the control system of the motor 14 of the second paper shortage drum 12 is the same as that of the first paper feed 9 described above.
The control system for the motor 13 of the drum 11 and the barrel 2 are constructed and operate in the same manner.

The present invention has the above-described configuration 1, and according to the present invention, a timer circuit that operates for a certain period of time during low speed rotation or minute rotation when the drawing drum is started, and other members constituting the motor control circuit. The first
．． The rotational torque of the second paper feed ζ ram during steady operation and the first
．． Since the rotational torque is applied by adding the rotational torque large enough to overcome the adhesion force between the second chamber and the paper, it is rotated, so when the drawing drum is rotated at low speed or slightly rotated when starting up. As a result, paper feeding can be carried out reliably, which has the effect of eliminating all troubles associated with unnecessary paper feeding.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a conventional drum-type automatic drawing machine, FIG. 2 is a system diagram showing an embodiment of the paper feed compensation circuit of the present invention, and FIG.
The figure shows the current value sent to the adder from the constant current value setting circuit of the motor control circuit, the output signal of the rotation speed of the plotting drum, the pulse that activates the timer circuit, the output signal from the timer circuit, and the output signal of the rotation speed of the plotting drum. 1. FIG. 6 is a diagram showing the relationship with the rotational torque applied to the second paper feed citram. l...plotting drum, 2...plotting drum motor, 3
．． 4-il, m2 f'rn A, 11.12・
...1st, 1st $2 excessive paper drum, 13.14...
1st. Second paper feed citram motor, 15.16...
・Constant current value setting circuit of motor control circuit, 17.18...
・Same adder, 19.20...Same motor drive section, 21・
・・Current value sent from the constant current value setting circuit to the adder,
22... Rotation speed detector of plotting drum, 23... Output signal from the rotation speed detector, 24... Motor drive signal during steady operation, 25... Timer circuit, 26... Timer circuit Pulse z given to 127...Output signal of the timer circuit, 28...Motor drive signal sent from the adder to the motor drive section, 100...Paper, 101.102
...The first page of the paper. A U-shaped portion depending within the second chamber.

Claims (1)

[Claims] Pass the paper along the middle of the length to the drawing drum, and place the paper in the first position below both sides of the drawing drum. The paper is allowed to hang down in a U-shape into the second chamber, and this hanging portion is sucked downward by an air flow, and both ends of the paper are drawn into the first chamber. In a drum-type automatic drafting machine, the second paper feed drum is wound around a second paper feed drum, and the second paper feed drums 1 to 9 are rotationally driven via a motor control circuit in correspondence with the rotational direction and rotational speed of the drawing drum. The first and second
When the drawing drum is started, the motor drive signal during steady operation is supplied with the first. A paper feed compensation circuit for a drum type automatic drafting machine, characterized in that it is configured to add a correction signal of a magnitude that overcomes the adhesive force between the second chamber and the paper.