JPS6261936B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method to temporarily stop the original paper and the photosensitive paper to maintain an appropriate copying interval when the original paper and the photosensitive paper are brought into close contact with each other and exposed and printed. This invention relates to an automatic standby device in a copying machine.

Generally, when making continuous copies, it is necessary to provide an appropriate copying interval between the original paper and the photosensitive paper.
If this spacing is not properly obtained, the trailing edge of the leading photosensitive paper and the leading edge of the following photosensitive paper will overlap 2.
There is a risk of duplicate copying. In addition, it is not possible to maintain an appropriate copy interval when measuring the light transmittance of the original drawing paper and automatically setting the exposure printing speed according to this light transmittance or adjusting the light intensity of the exposure lamp. Also, there were problems such as the following photosensitive paper being printed due to the exposure/printing settings for the preceding original paper, making it impossible to obtain a proper copy.

In view of the above-mentioned points, it is an object of the present invention to provide an automatic standby device for a copying machine that eliminates the drawbacks of the prior art, has a simple structure, and is reliable in its operation.

According to the present invention, this purpose is achieved by providing a sensor between an original paper insertion detection sensor that detects the insertion of an original paper and a conveyor belt that conveys the original paper and the photosensitive paper that is superimposed and adhered to the original paper to the exposure and printing drum. a rotary plate having a claw-like protrusion that rotates and projects from the conveyor belt; a driven roller that follows the conveyor belt to convey the original paper and the photosensitive paper; and a rotary plate that rotates the rotary plate. a clutch mechanism provided on a shaft body, and a clutch mechanism provided on the clutch mechanism so that the trailing edge of the original paper passes through the rotating plate, thereby operating the clutch mechanism to rotate the rotating plate. A rotary plate operation solenoid mechanism that holds the claw-like protrusion in a protruding state from the conveyor belt and raises the driven roller from the conveyor belt, and a rotating plate operation solenoid mechanism that is provided on a shaft body that rotates the conveyance roller that conveys the original paper. and another clutch mechanism provided in the clutch mechanism, which operates the other clutch mechanism to stop the conveying roller when the next original sheet reaches the rotary plate by the conveying roller, and the next original sheet is moved to the next original sheet. The number of pulses generated in synchronization with a standby solenoid mechanism that puts paper on standby, and a drive motor that transports the original paper from the original paper detection sensor to the rotating plate and until it passes the exposure and printing drum. This is achieved by including a pulse counting circuit that counts and operates the rotating plate operating solenoid mechanism and the standby solenoid mechanism.

Next, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 shows a schematic diagram of an embodiment of the present invention. In the figure, a copying machine 100 includes an exposure and printing drum 5, an exposure lamp 6 built into the exposure and printing drum 5, insertion conveyance rollers 8 and 9 that convey an original paper 101 to be inserted, and intermediate conveyance rollers 12,
13, and a conveyor belt 3 that conveys the photosensitive paper 102 to the exposure and printing drum 5 while bringing the photosensitive paper 102 into close contact with the original paper 101.
, a rotary plate 1 interposed between the conveyor belt 3 before conveyance to the exposure and printing drum 5, and a driven roller 2. Further, behind the insertion conveyance rollers 8 and 9, there is an original paper insertion detection sensor, for example, a photo sensor 31, and behind this photo sensor 31 there is an optical fiber 11 that transmits the exposure light of the exposure and printing drum 5, and a connection between the optical fiber 11 and the optical fiber 11 is provided. An original paper exposure transmittance detection sensor, for example, a photo sensor 10, is arranged to detect the exposure transmittance of the passing original paper. 4 is a drive roll of the conveyor belt 3; 7 is a reflection plate of the exposure lamp 6; 32 is a drive roll for transporting the original paper 101 and the photosensitive paper 102 onto the conveyor belt 3
This is a guide board to guide you to. Note that the optical fiber 11
Instead, a dedicated light source lamp may be used.

The rotating plate 1 has two equally spaced claw-like protrusions 33 on its outer periphery.
protrudes from the surface of the conveyor belt 3 and raises the driven roller 2 to prevent the original drawing paper 101 and the photosensitive paper 102 from being conveyed to the exposure and printing drum 5. 33A shows the steady state of the claw-like protrusion piece, and 2A shows the steady state of the driven roller due to the claw-like protrusion piece 33A.

Insert the preceding original drawing paper 101 into the copying machine 100,
It is carried in by the insertion conveyance rollers 8 and 9. The original drawing paper insertion detection sensor, in this embodiment the photo sensor 31, detects the insertion of the preceding original drawing paper 101. This original drawing paper 101 passes between the optical fiber 11 and the original drawing paper exposure rate detection sensor, in this embodiment, the photo sensor 10, and the exposure transmittance is detected and measured, and the exposure printing speed or exposure amount is automatically adjusted to an appropriate value. shall be carried out. Note that the original paper 101 further passes through intermediate conveyance rollers 12 and 13, and then is transferred to a separately conveyed photosensitive paper 102.
The conveyor belt 3 and the driven roller 2
The image is conveyed to the exposure/printing drum 5 and printed. When the rear edges of the original paper 101 and the photosensitive paper 102 pass through the rotating plate 1, the rotating plate 1 rotates to project the claw-like protrusions 33 from the conveyor belt 3, thereby raising the driven roller 2. At this time, the backward original drawing paper 1
01 and the photosensitive paper 102 are inserted into the copying machine 100 and are transported by the insertion transport rollers 8, 9 and the intermediate transport rollers 12, 13, but their leading edges abut against the claw-like protrusions 33 of the rotating plate 1 and stop. . at the same time,
Insertion conveyance rollers 8, 9 and intermediate conveyance roller 1
The rotation of 2 and 13 also stops. The insertion conveyance roller 9 and the intermediate conveyance roller 13 are rotated synchronously by a chain 25 shown in FIG. Rotates driven by. Further, at this time, for example, the exposure printing speed is maintained at an automatically adjusted speed based on the exposure transmittance of the preceding original paper 101, and the exposure transmittance of the backward original paper 100 is stored in a storage circuit (not shown).

When the trailing edge of the preceding original drawing paper 101 and photosensitive paper 102 has finished passing through the exposure and printing drum 5, the rotating plate 1 is rotated again, and the claw-like projection piece 33A in the steady state is rotated again.
As a result, the driven roller 2 descends, contacts the conveyor belt 3, and rotates. At the same time, the insertion conveyance rollers 8, 9 and the intermediate conveyance rollers 12, 13 start rotating,
The original paper 101 and the photosensitive paper 102 are transported backward. In addition, the copying machine 100 is automatically adjusted to the exposure printing speed based on the exposure transmittance of the original paper 101 moving backward.

Next, FIG. 2 shows a schematic configuration diagram of the main parts of the present invention. In the figure, parts having the same functions as those in FIG. 1 are given the same reference numerals. Drive roller 4
is provided on the shaft body 18, and drive power of a drive mechanism (not shown) of the copying machine 100 is transmitted through the sprocket gear 15 to drive the conveyor belt 3. Further, a drive gear 16 provided on the shaft body 18
drives a rotary plate gear 20 provided on the shaft body 14 via an intermediate gear 19. This rotating plate gear 20
rotates the rotating plate 1 provided on the shaft body 14.
Note that the sprocket gear 1 provided on the shaft body 18
7 is an intermediate conveyance roller 13 provided on the shaft body 40
Rotation is then transmitted through the chain 25 and sprocket gear 26. The clutch mechanism 21 is provided at the end of the shaft body 14, and is connected to the cylinder body 34 and the cylinder body 34.
and a spring clutch (not shown) housed in the. Four through holes 35 are bored at equal intervals on the outer periphery of the cylinder 34. The rotating plate operating solenoid mechanism 22 includes a solenoid 36 , a lever 23 connected to the end of a plunger 37 of the solenoid 36 , and a lever 23 provided in a through hole 35 of the clutch mechanism 21 so as to be freely insertable and removable. It consists of a protrusion 39 and a return spring 24. The clutch mechanism 27 is provided at the end of the shaft body 40 and consists of a ratchet wheel 41 and a spring clutch (not shown) built into the cylinder body 41A. The standby solenoid mechanism 28 includes a solenoid 42, a lever 29 connected to the end of the plunger 43 of the solenoid 42, a ratchet stopper 45 of the lever 29 that is engageable with the ratchet wheel 41, and a return spring 30. Consisting of

When the solenoid 36 of the rotating plate operation solenoid mechanism 22 is energized, the plunger 37 is attracted, and the lever 23 moves the protrusion 39 away from the through hole 35 of the clutch mechanism 21 against the return spring 24. This disengagement causes the spring clutch to actuate, causing the cylinder 34 and the shaft 14 to rotate, thereby causing the rotating plate 1 to rotate. The solenoid 36 is energized instantaneously and is pulled back by the return spring 24.
A protrusion 39 is attached to the next through hole 35 of the rotating cylinder 34.
is inserted, the shaft body 14 is stopped, and the claw-like protrusion pieces 33 of the rotary plate 1 are made to protrude from the conveyor belt 3 and held. Also, when the solenoid 42 of the standby solenoid mechanism 28 is energized, the latch stopper 4
5 operates to stop the rotation of the ratchet wheel 41 and the rotation of the intermediate conveyance roller 13.
When the solenoid 42 is de-energized, the return spring 30 pulls back the latch stopper 45, and the intermediate conveyance roller 13 rotates via the latch wheel 41.

Next, FIG. 3 shows a flowchart of one embodiment of the present invention. In the figure, the original paper informs that the original paper 101 or the photosensitive paper 102 may be inserted, such as whether the original paper 101 or the photosensitive paper 102 is not jammed in the copying machine 100 or whether the photosensitive paper 102 is being conveyed normally. Make sure that the insertion instructions are displayed. After this confirmation, the original paper 101 is inserted into the copying machine 100. When the original paper 101 is inserted and conveyed, the insertion and conveyance of the original paper 101 is detected by the original paper insertion detection sensor 31 and the original paper detection circuit. The original paper light transmittance detection circuit detects and measures the exposure transmittance of the original paper 101. Next, check whether or not automatic exposure speed control is in progress, and if automatic exposure speed control is not in progress,
The light transmittance of the original paper is converted into a signal for controlling the speed of the drive motor. Before the original paper 101 reaches the exposure and printing drum 5, timing is determined and the drive motor speed control circuit puts the exposure speed into an automatic exposure speed control state. At this time, the original paper 101 is conveyed in close contact with the photosensitive paper 102, which is conveyed through a separate conveyance path. Here, when the light transmittance of the original paper 101 is detected and measured, if automatic exposure speed control is already in progress, the light transmittance of the original paper 101 is stored in the storage circuit,
The original paper 101 and the photosensitive paper 102 are on standby.

Next, in the automatic exposure speed control state, the trailing edge of the preceding original paper 101 is detected by the original paper insertion detection sensor 3.
1 and the original paper detection circuit is released, the backward original paper 101 and photosensitive paper 10 are
A pulse counting circuit operates to instantaneously operate the rotary plate operating solenoid 36 so that the image 2 is not conveyed to the exposure and printing drum 5. Further, the pulse counting circuit operates to cancel automatic exposure speed control. This pulse counting circuit converts the distance from the original paper insertion detection sensor 31 to the rotary plate 1 and the distance to the end of passing through the exposure and printing drum 5 into a number of pulses synchronized with the drive motor, and converts this number of pulses into a number of pulses synchronized with the drive motor. The timing at which the trailing edge of the preceding original drawing paper 101 passes through the rotating plate 1 after counting, the timing when the trailing edge of the preceding original drawing paper 101 finishes passing through the exposure and printing drum 5, or the timing when the trailing original drawing paper 101 rotates. When the plate 1 is reached, the timing for activating the standby solenoid 42 is detected.

When the rotary plate operation solenoid 36 is operated by the pulse counting circuit, the rotary plate 1 rotates 1/4, causes the claw-like protrusion piece 33 to protrude from the conveyor belt 3, and raises the driven roller 2. When the leading edges of the original drawing paper 101 and the photosensitive paper 102 that move backward reach the rotating plate 1, the standby solenoid 42 is activated and the insertion conveyance rollers 8,
9 and intermediate conveyance rollers 12 and 13 are stopped and kept in a standby state.

When the trailing edge of the preceding original paper 101 finishes passing through the exposure and printing drum 5, automatic exposure speed control is canceled. At this time, the rotary plate operation solenoid 36 is momentarily energized again, rotates the rotary plate 1 by 1/4 turn, pulls back the pawl-like protrusion piece 33 from the surface of the conveyor belt 3, and moves the driven roller 2 to the conveyor belt. Lower and rotate until it touches 3. At the same time, the standby solenoid 42 is de-energized, the insertion conveyance rollers 8 and 9 and the intermediate conveyance rollers 12 and 13 are rotated, and the original paper 101 and the photosensitive paper 102 are conveyed backward. At this time, an automatic exposure speed control state is entered based on the light transmittance of the backward original paper 101 stored in the storage circuit. Note that even though the automatic exposure speed control based on the light transmittance of the preceding original drawing paper 101 has been canceled, if the backward original drawing paper 101 is not in the standby state, the drive motor returns to the constant speed state and It waits for the original paper 101 to be inserted.

Note that although this embodiment will be described in the case of automatic exposure speed control, the same applies to the case of automatic exposure amount control.

As described above, according to the present invention, there is provided an original paper insertion detection sensor that detects the insertion of an original paper, and a rotating plate that is provided on a conveyor belt and has a claw-like protrusion that rotates and projects from the conveyor belt. , a driven roller that follows the conveyor belt, a clutch mechanism provided on a shaft body that rotates the rotary plate, a solenoid mechanism for operating the rotary plate provided on the clutch mechanism, and a conveyor roller. Another clutch mechanism provided on the rotating shaft body, a standby solenoid mechanism provided in this clutch mechanism that waits for the backward moving original paper, and a pulse that operates the rotating plate operating solenoid mechanism and the standby solenoid mechanism. By including a counting circuit, the configuration is simple, the operation is reliable, double copying is prevented, and a proper copying state can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, and FIG.
The figure is a schematic diagram of the main part of FIG. 1, and FIG. 3 is a flowchart of an embodiment of the present invention. Explanation of main symbols in the figure: 1: rotating plate, 2:
Driven roller, 3: Conveyance belt, 5: Exposure and printing drum, 8, 9: Insertion conveyance roller, 10: Original paper exposure detection sensor, 12, 13: Intermediate conveyance roller, 2
1, 27: Clutch mechanism, 22: Rotating plate operation solenoid mechanism, 28: Standby solenoid mechanism, 1
00: Copying machine, 101: Original paper, 102: Photosensitive paper.

Claims (1)

[Claims] 1. An original drawing paper insertion detection sensor that detects the insertion of an original drawing paper, and a conveyor belt that conveys the original drawing paper and the photosensitive paper in close contact with the original drawing paper to the exposure and printing drum, and is rotated to convey the photosensitive paper from the conveyor belt. A rotating plate having a protruding claw-like protrusion piece, a driven roller that follows the conveyor belt to convey the original paper and the photosensitive paper, and a clutch mechanism provided on a shaft body that rotates the rotating plate. , provided in the clutch mechanism, when the trailing edge of the original paper passes the rotating plate, the clutch mechanism is operated to rotate the rotating plate to cause the claw-like protrusions to protrude from the conveyor belt; a solenoid mechanism for operating a rotary plate that holds and raises the driven roller from the conveyor belt; another clutch mechanism provided on a shaft body that rotates a conveyance roller that conveys the original paper; and a clutch mechanism provided on the clutch mechanism. a standby solenoid mechanism that operates the other clutch mechanism to stop the conveyance roller and wait for the backward original paper when the backward original paper reaches the rotary plate by the conveyance roller;
A solenoid mechanism for operating the rotary plate by counting the number of pulses generated in synchronization with a drive motor that transports the original paper from the original paper detection sensor to the rotary plate and until it passes the exposure and printing drum. and a pulse counting circuit for operating a standby solenoid mechanism.