JPS5831138Y2 - Transfer control device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conveyance control device for a diazo copying machine.

In a diazo copying machine, when an original is placed over photosensitive paper and inserted through an insertion slot, the original and the photosensitive paper are conveyed by a conveyor belt and copies are made.

However, if the original or photosensitive paper is inserted incorrectly, it is necessary to pull it out from the insertion slot or to correct its position, but this is difficult because the conveyor belt travels at a high speed.

Conventionally, when the original and photosensitive paper are inserted incorrectly, two methods have been proposed: one is to rotate the motor in reverse to run the conveyor belt in the opposite direction, and return the original and photosensitive paper from the insertion slot. A method is adopted in which the traveling speed is reduced to a low speed and the original and photosensitive paper are pulled out from the insertion slot or their positions are corrected.

However, in the former case, since the motor is reversed, the configuration becomes complicated both in terms of circuitry and mechanical aspects.

In the latter case, even if you loosen the conveyor belt, adjust the position of the original and photosensitive paper without pulling them out, and then loosen the conveyor belt, the motor continues to rotate. It suddenly starts moving at high speed, and the slippage causes wrinkles in the original and photosensitive paper, causing a jam.

In view of these points, the present invention aims to provide a transport control circuit that can stop the transport system and control the transport system to run at low speed, thereby eliminating the above-mentioned problems.

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, in a diazo copying machine, a conveyor belt 1 is wound around rollers 2 to 5 and a cylinder glass 6.
Rotationally driven by a driving DC motor.

The original 7 is superimposed on the photosensitive paper 8 and is inserted from the top of the table 9 to the conveyor belt 1 between the conveyor belt 1 and the guide plate 10.

The original 7 and the photosensitive paper 8 are conveyed by the conveyor belt 1, and as they pass between the conveyor belt l-1 and the cylinder glass 6, they are exposed to light from a light source. is developed, and this photosensitive paper 8 is discharged as a copy outside the machine via a fixing section, and the original 7 is also discharged outside the machine.

Further, the roller 5 is pivotally attached to the center of the lever 12, and the roller 5 is
One end of the lever 2 is rotatably supported, and the other end is pivotally connected to one end of the lever 13.

The center portion of the F-shaped swinging member 14 is rotatably supported, and both ends are pivotally connected to the other end of the lever 13 and one end of the lever 15.

The foot pedal 16 is rotatably supported at its support end, the other end of the lever 15 is pivotally connected, and a compressible spring 17 is attached between the foot pedal 16 and the immovable member.

Therefore, the foot pedal 16 is given a counterclockwise rotational tendency by the spring 17 and is normally in the position shown in the figure, so that the roller 5 is normally in the position shown by the solid line and the conveyor belt 1 is in a tensioned state.

However, when the foot pedal 16 is depressed against the spring 17, the roller 5 moves to the dotted line position and the conveyor belt 1 loosens.

Further, the lever 13 is provided with a protrusion 18 and a switch SW1 is arranged correspondingly to the protrusion 18, and the switch SW1 is driven by the protrusion 18 when the foot pedal 16 is depressed.

As shown in FIG. 2, the movable contact piece of the switch SW1 is connected to one end 19 of the AC power source, and a speed adjusting slide transformer T is connected between the normally closed side fixed terminal of the switch SW1 and the other end 20 of the AC power source. and the input terminal of the rectifier circuit REC1 are connected.

The driving DC motor 21 has a field winding 22 and an armature M.
are connected to the output sides of the rectifier circuits RFC, REC2, respectively, and the input side of the rectifier circuit REC2 is connected to the slide transformer T.
Normally closed contacts RL1-2 and normally closed contacts R of Lu-RL1 are connected between the slide terminal T1 and the tap terminal T2 and the terminal 20, respectively.
They are connected via L1-3, respectively.

Relay RL1 is connected between the normally open side fixed terminal of switch SW1 and terminal 20, and has its own normally closed contact RL1.
and switch SW2 in series between terminals 19 and 20.

As shown in FIG. 3a, l), the speed adjustment knob 23 is connected to the slide terminal T1 of the slide transformer T and the stopper
4, and a switch SW2 is arranged corresponding to the stopper 24.

The slide terminal T1 is slid by the knob 23, and the stopper 24 is latched to the switch SW2 when the knob 23 rotates to a point where the speed is zero, stopping the rotation of the knob 23 and driving the switch SW2.

However, switch SW1. When SW2 is off, terminal 19
．． 20 is rectified by the rectifier circuit REC1 and supplied to the field winding 22 of the DC motor 21, transformed by the slide transformer T, rectified by the rectifier circuit REC2, and supplied to the armature M of the DC motor 21. Ru.

Therefore, the DC motor 21 rotates at the speed set by the speed adjustment knob 23 to drive the conveyor belt 1.

If the original 7 and the photosensitive paper 8 are inserted incorrectly, when the foot pedal 16 is depressed, the conveyor belts 1 to 1 loosen, and at the same time the switch SW1 is turned on and the power supply to the DC motor 21 is stopped and the conveyor belt 1 is turned on. stops.

Therefore, even if the wrongly inserted original 7 or photosensitive paper 8 is wrapped around the cylinder glass 6 at its leading end, it can be pulled out and its position can be corrected.

On the other hand, relay RL operates when switch SW1 is turned on, and closes normally closed contact RL1-1 to self-hold.

Thereafter, when the user stops pressing down on the foot pedal 16, the conveyor belt 1 returns to the tensioned state and the switch SW1 is turned off.

Therefore, the power supply to the DC motor 21 is restarted, but the output of the slide transformer T is switched from the output of the slide terminal T1 to the output of the tap terminal T2 by the relay RL, and the DC motor 21 rotates at a constant low speed. Transport bell l-1
rotates at low speed.

Next, when copying is to be performed again, return the knob 23 to the zero speed position and turn on the switch SW2, then the relay RL1
is restored and the output of the slide transformer T or the tap terminal T
2 is switched to the output of the slide terminal T1.

Then, by turning the knob 23 to rotate the motor 21 at a desired speed, copying can be performed in the same manner as described above.

As described above, according to the control device according to the present invention, the conveyor belt is loosened by the loosening operation, and its drive system is stopped by the first switch. Therefore, if an original or photosensitive paper is inserted incorrectly, the conveyor belt can be loosened and stopped. The original and photosensitive paper can be easily pulled out or repositioned.

Also, since the speed of the drive system is set to a predetermined low speed by the first switch and reset by the second switch, it is possible to avoid suddenly moving the conveyance system at a high speed, thereby preventing jams. I can do it.

Furthermore, since the drive system is not reversed, the configuration is simplified.

[Brief explanation of drawings]

Fig. 1 is a schematic side view of an example of a diazo copying machine to which the present invention is applied, Fig. 2 is a circuit diagram showing a motor control circuit in the same diazo copying machine, and Fig. 3 a, l) is a schematic side view of an example of a diazo copying machine to which the present invention is applied. FIG. 1 is a side view and a front view showing a part of the copying machine. 21... Drive DC motor, RECl, REC
2... Rectifier circuit, T... Slide transformer, RL,... Relay, SWl, SW2...
...Switch, 1 ... Conveyor belt, 12゜13.15 ... Lever, 14 ... Swinging member, 16 ... Foot pedal , 17...
Spring, 18...protrusion.

Claims (1)

[Scope of utility model registration request] In a diazo copying machine having a conveyor belt for conveying stacked originals and photosensitive paper, and a drive system for driving the conveyor belt, a loosening means for loosening the conveyor belt by a loosening operation, and a loosening means for loosening the conveyor belt by the loosening operation; a first switch that stops power supply to the drive system;
A conveyance control device comprising: a circuit that is set to an operating state by the operation of a switch to switch the speed of the drive system to a predetermined low speed; and a second switch that resets the circuit.