JPH0135330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diazo copying machine, and more particularly to a diazo copying machine capable of producing a large number of printed copies from one original.

Conventionally, in a diazo copying machine that prints a large number of copies from a single document, a circulation path branched from a document ejection path is connected to a document insertion path, and a document feed path switching mechanism is used. A large number of printed copies were obtained through this operation.

However, in the conventional copying machine, the original is separated from the printing section, sent to the original insertion path through a circulation path branched in the middle of the original ejection path, and then inserted into the printing section, which is repeated a desired number of times. I was walking along. As a result, it takes a long time to print a large number of sheets, and the conveyance mechanism becomes complicated due to the formation of a circulation path, which can cause paper jams.
It also had a number of drawbacks, such as the size of the copying machine.

An object of the present invention is to provide a diazo copying machine in which the time required for copying a large number of sheets is shortened as much as possible.

Another object of the present invention is to provide a diazo copying machine that can reliably copy a large number of copies without causing problems such as paper jams.

Still another object of the present invention is to provide a diazo copying machine that can be made compact.

In order to eliminate the above-mentioned conventional drawbacks and achieve the above-mentioned object, the present invention provides a printing cylinder with a built-in light source tube, a conveyor belt stretched around the cylinder and several guide rollers. In a diazo copying machine that carries out printing by conveying an original and a photosensitive paper in an overlapped manner during printing, a comb-shaped comb is provided on the cylindrical body and locks the original when the original is set and holds the original by winding it around the printing cylindrical body. a locking mechanism including a document leading edge locking piece; an automatic paper feeding mechanism that automatically feeds photosensitive paper so as to overlap the document wound and held in the printing cylinder; a second detection means for activating the mechanism; a preset counting mechanism for counting the number of copies;
a third detection means that operates as a counting switch of a preset counting mechanism; a photosensitive paper separating mechanism that separates the printed photosensitive paper from the printing cylinder; and a comb-shaped sensor that separates the original from the printing cylinder; A document separation mechanism includes a document leading edge locking piece and alternating comb-shaped document separation pieces, and the document leading edge locking piece is moved to a document releasing position in order to bring the document leading edge locking piece into an unlocked state. a fourth document separation mechanism arranged behind the first, second, and third detection means;
a detection means for stopping the printing cylindrical body at a predetermined position where the locking mechanism locks the leading edge of the document; a first detection means for activating the stopping mechanism; When the actuating piece is attached to a predetermined position and operates each of the detection means and the preset counting mechanism does not count a predetermined number of sheets, even if the fourth and first detection means detect, the document separation actuation mechanism and the stop mechanism do not operate. without operating, the preset counting mechanism counts a predetermined number of sheets, and in response to a signal indicating a reset state and detection by a fourth detection means, the document separation operation mechanism is operated, and the second detection means is inactivated; A control circuit is provided that operates the stop mechanism in response to detection by the first detection means that is activated next.

Hereinafter, the present invention will be explained with reference to an embodiment shown in the drawings.

FIG. 1 shows a diazo copying machine of the present invention, in which a document guide plate 2 for inserting a document a is provided on the top surface of a main body 1, and the document guide plate 2 is movable to define the insertion position of the document. A possible document cursor 3 is attached. A copy receiver 4 is installed on the front of the main unit to receive the photosensitive paper that has been printed and developed, and a document receiver 5 is installed on the rear of the main unit to receive a predetermined number of printed originals. A photosensitive paper feeding cassette 6 is provided which stores photosensitive paper stacked therein for feeding. A dial 7 provided on the top surface of the main body is a dial for power supply and for starting copying, and a dial 8 is a speed adjustment dial for adjusting the conveyance speed of the original and photosensitive paper.
Furthermore, an operating lever 26 is provided on the top surface of the main body to operate a locking mechanism that locks the inserted document a to the cylindrical body.

Next, in FIGS. 2 and 3, a plurality of guide rollers 10 are rotatably supported between the fuselage frames 9 and 9, and one of the guide rollers 10 is provided with a clutch _C1. , the clutch _C1 and the drive motor M are connected by a chain 11, and the driving force of the drive motor M is transmitted to the guide roller 10 by the operation of the clutch _C1 .

A conveyor belt 12 is looped around the guide roller 10, and a baking cylinder 13 made of heat-resistant glass or heat-resistant plastic is attached to a plurality of rollers (not shown) circumscribing the loop of the conveyor belt 12. Therefore, the rotation of the drive motor M passes through the chain 11 and the clutch _C1 to the guide roller 1.
0 and when the conveyor belt 12 rotates, the cylindrical body 13 rotates in accordance with the conveyor belt 12.

A shielding plate 14 and a printing light source lamp 15 are provided inside the cylindrical body 13, and when the polymer of the document a and the photosensitive paper b is conveyed between the cylindrical body 13 and the conveyor belt 12, the light source By being irradiated by the tube light 15, the photosensitive paper b is printed. Reference numeral 16 is a fan for cooling the cylindrical body 13.

Further, the cylindrical body 13 is provided with a locking mechanism 17 for locking the leading end of the document a. The locking mechanism 17 includes a notch provided in a part of the cylindrical body 13 in the longitudinal direction, and a joint 18 fitted in the notch.
, a locking portion 19 pivotally supported in a swingable manner by the joint portion 18 , and a document leading edge locking piece 20 attached to the tip of the locking portion 19 . The document leading edge locking piece 20 is preferably formed of a transparent thin member such as a film, in which case the leading edge of the document to be locked can also be printed.

Further, in the embodiment of the present invention, as shown in FIG. 3, a plurality of notches are provided in the document leading edge locking piece 20 to form a comb shape, so that the document can be separated in a manner corresponding to the shape of the document separating claw, which will be described later. It is designed to be separated from the cylindrical body.

In addition, in order to lock the document a to the document leading edge locking piece 20, the shaft 19' of the document locking portion 19 is connected to the joint portion 18.
An L-shaped locking part release lever 21 is attached to the end thereof, and a spring Sp is provided between the one end of the release lever 21 and the joint part 18 so that the locking part 19 is always in the locked state. I have to. Furthermore, the release lever 21 at the stop position of the cylindrical body 13
Corresponding to this, a locking and releasing mechanism 22 is provided on the frame 9. The locking and releasing mechanism 22 includes a support plate 23 attached to the frame 9, and an operating rod 26 that is movable up and down on the support plate 23 and held by a spring 24 and a stopper 25. The lower end of the operating rod 26 corresponds to one end of the lever 21, and when the operating rod 26 is pushed downward against the spring 24, the lever 21 rotates around the shaft 19' against the spring Sp. The locking portion 19 is thereby opened. At this time, insert the original a along the original guide plate 2, and place the leading end of the original into the locking part 1.
9 and when the pushing force of the operating rod 26 is released, the operating rod 26 is restored by the spring 24, and the leading edge of the document a is securely locked by the locking piece 20. .

Next, the document a is attached to the locking mechanism 1 of the cylindrical body 13.
7 and rotates, the printing light source 1
At the irradiation start portion G of No. 5, the photosensitive paper b fed from the photosensitive paper automatic paper feeding mechanism 27 overlaps with the photosensitive paper b.

A generally known paper feeding mechanism is used as the photosensitive paper automatic paper feeding mechanism 27, and in the present invention, the paper feeding roller ₂ is operated by a clutch C2 operated by a signal to be described later.
8 rotates to feed paper. In front of the paper feed roller 28, there is a pair of transport rollers 29, 29 that feed the photosensitive paper b fed from the paper feed mechanism 27, ensuring that the original a and the photosensitive paper b are aligned at the overlap point G and reach the printing area. It is being transported.

Further, the original a and the photosensitive paper b are superposed and passed through the printing area, and the photosensitive paper b that has been printed is transferred to the cylindrical body 13.
As shown in FIG. 4, the separation mechanism 33 for separating the
9. It has a support member 34 fixed to the shaft 39, and a separation piece 35 attached to the tip of the support member 34. The separating piece 35 is made of a flexible material, and is attached to the cylindrical body 13 or the document a wound thereon.
If no damage is caused to the cylindrical body 13, the separation piece 35 may be attached to the cylindrical body 13 in a constantly sliding state.
If damage is to be caused, it is only necessary to contact the cylindrical body 13 when separating the photosensitive paper b. Therefore,
A protrusion 34' is provided on the support member 34, and the protrusion 3
Attach the pin 36 that engages with the frame 9 to the frame 9;
Further, a spring 38 is tensioned between the pin 37 attached to the frame 9 and the support member 34, and is normally held at the position shown by the solid line in the figure. Furthermore, in order to rotate the shaft 39 to which the support member 34 is attached clockwise in the drawing, a lever 40 is attached which is connected to the shaft 39 and whose tip is located near the side surface of the cylindrical body 13.
On the other hand, a contact 32 that abuts the lever 40 is provided at the joint 18 of the document locking mechanism 17 .

Therefore, when the polymer of the document a and the photosensitive paper b passes through the printing area and the cylindrical body 13 continues to rotate, the abutment 32 comes into contact with the tip of the lever 40, thereby causing the support member to 34 is moved against the spring 38 to the position shown by the dashed line in the figure, the separating piece 35 is brought into contact with the cylindrical body 13, the printed photosensitive paper b is separated from the cylindrical body 13, and the photosensitive paper b is developed. The device 42 (see FIG. 2) is used to convey the material. The photosensitive paper developed by the developing device 42 is discharged to the copy receiver 4 shown in FIG.

Note that when separating the photosensitive paper by the photosensitive paper separating mechanism 33, it is sufficient to separate only the leading end of the photosensitive paper b from the cylindrical body 13.
The separating piece 35 is brought into contact with the circumferential surface of the cylindrical body 13 until the leading edge of the photosensitive paper reaches the position of the separating mechanism 33, and when the leading edge of the photosensitive paper is changed to the discharge direction by the separating piece 35, the lever 40 and The contact with the abutment 32 is released, and the support member 34 returns to the position indicated by the solid line by the action of the spring 38.

Next, the document a that has passed through the separation mechanism 33 is wound around the cylindrical body 13 and rotates a preset number of times in synchronization with the fed photosensitive paper. After the set final copy is printed and the photosensitive paper b is separated, the document a is released from the locking mechanism 17 and is discharged from the document discharge path 44 to the document receiver 5.

In the present invention, the method for releasing the document a from the locking mechanism 17 is to release the locking portion 19 of the document locking mechanism 17 when the document a passes the starting position from the cylindrical body 13 after finishing the printing of the final copy, and The separation mechanism 43 is activated to eject the document a. The document separation mechanism that opens the locking portion 19 and operates the document separation mechanism 43 includes a contact mechanism 47, a solenoid SL, and a connector 56. The hitting mechanism 47 is
One end of the release lever 21 attached to the shaft 19' of the locking portion 19 comes into contact with the locking portion 19 for a desired period of time during the final rotation to release the locking portion 19.

The hitting mechanism 47 is provided with a connecting plate 48 that is connected to the solenoid SL and starts using a pin l attached to the frame 9 as a fulcrum, as shown in FIG.
The other end is a contact plate 51 held by a long hole 49 and pins 50, 50 so as to be able to move approximately vertically.
is locked through the horizontal elongated hole 52.

Therefore, when the solenoid SL operates, the connecting plate 48 swings about the pin l as a fulcrum, and the contact plate 5
1 to the contact position of the lever 21. Therefore, when the lever 21 comes to the contact position due to the rotation of the cylindrical body 13, the lever 21 is rotated counterclockwise and the locking portion 19 is moved to the document release position. The document a is held in the cylindrical body 1 with its tip in the unlocked state.
3, and is then separated from the cylindrical body 13 by actuating the document separation mechanism 43 using the connector 56.

The document separation mechanism 43 includes a support member 45 fixed to a shaft 45' that is swingably provided on the frame 9;
It consists of a separation piece 46 attached to the tip of the support member 45. The separation piece 46 is formed into a comb shape corresponding to the shape of the document leading edge locking piece 20 (see FIG. 3). If this separating piece 46 is made of a flexible material and does not cause any damage to the cylindrical body 13, it may be fixed to the cylindrical body 13 in a constant sliding state, but if it causes damage, It is necessary to bring the cylindrical body 13 into contact only when separating the document a.

For this purpose, as shown in FIG.
5 is provided with a protrusion 45a, a pin m that engages with the protrusion 45a is attached, and the support member 45 and frame 9
A spring 55 is tensioned around a pin 54 attached to the pin 54 so that the support member 45 is normally kept at the position shown by the solid line, and when separated, the support member 45 is moved to the position shown by the dashed line. Therefore, when the solenoid SL is actuated, the connecting member 56 moves substantially downward, and the supporting member 45 is moved against the spring 55 to push the separating piece 4
6 is brought into contact with the cylindrical body 13 in preparation for separating the document a.

Thus, when the leading edge of the document a is transferred in an unlatched state by the operation of the contact mechanism 47, the protruding piece 20a of the document locking piece 20 described above fits into the notch of the document separating piece 46 and is transferred. Between, manuscript a
The leading end of is sent to the discharge passage 44 by the separation piece 46.

When the solenoid SL is disconnected, the original separation support member 45 is returned to its original position by the spring 55, and the contact plate 51 is moved to the lever 21.
Move to the non-contact position.

Next, when the cylindrical body 13 rotates to completely eject the original and reaches the stop (start) position, the drive transmission from the main motor M is cut off and the cylindrical body 13 stops.

The operation described above is accomplished by the construction and electrical circuitry shown in FIGS. 6 and 7.

That is, as shown in FIG.
a first detection means S ₁ for stopping the photosensitive paper b at a predetermined position (stop position); a second detection means S ₂ for operating the photosensitive paper automatic paper feeding mechanism 27 and feeding the photosensitive paper b; A third detection means S ₃ counts the number of copies and operates as a counting switch for the preset counting mechanism RT, and a fourth detection means S ₄ operates the document separation mechanism 43 in cooperation with the preset counting mechanism RT. It is provided on the frame 9. The detection means S ₁ to S ₄ are switched by an actuation piece P attached to a predetermined position of the cylindrical body 13 (for example, the locking mechanism 17).

The sensing means S ₁ to S ₄ are controlled by the electrical circuit shown in FIG.

That is, when the main switch MS is turned on, the burning light source tube L15 is turned on by the current supplied from the power source E, and the motor M is driven. Then,
The operating rod 26 is pushed to open the locking mechanism 17, and the document a is inserted along the document guide plate 2.
When the leading edge of document a reaches the predetermined position, the operation lever 26
When the push is released, the leading edge of the document a is locked in the locking mechanism 17.
It is locked by.

Next, when the button PB is turned on by operating the copy start dial 7, the relay _R1 is energized and the relay contact _R1-1 is turned on. By turning on contact R _1-1 , relay R ₁ is self-held. Therefore, dial 7 automatically turns on PB when button PB is turned on.
Although it turns OFF, relay R ₁ continues to operate through contact R _1-1 . Also, the clutch _C1 for driving the conveyor belt is actuated via the relay contact _R1-1 , and the drive of the main motor M is transmitted to the guide roller 10 via the chain 11, and this operation causes the guide roller 10, the conveyor belt 12. Rotate the cylindrical bodies 13 respectively.

When the cylindrical body 13 rotates, the actuating piece P moves to release contact with the first detection means _S1 , and its contact becomes ON.

Next, when the actuating piece P pushes the second detection means _S2 , the first detection means _S1 or the relay contact _R1-1 ,
The photosensitive paper feeding clutch is connected via the second detection means _S2 .
C ₂ is excited, and the paper feed roller 28 feeds the photosensitive paper b.
is fed. The second detection means controls the operating time of the detection means S2 by, for example, an actuator S so that the _second detection means operates until a sheet of photosensitive paper is completely fed. Note that the same effect can also be achieved by other methods.

Thereafter, the leading edge of the document a wound around the cylindrical body 13 and the leading edge of the photosensitive paper b to be fed are superposed at a polymerization point G immediately before the printing section, and the polymer is transferred to the cylindrical body 1.
3 and conveyor belt 12 and conveyed.

Next, the actuating piece _P turns on the third detection means _S3 , which is connected to a preset counting mechanism RT that is set in advance when copying a large number _of sheets. Each time it is turned on, it is counted, and when a preset number has been counted, contact RT- ₁ of the counting mechanism RT is set to the initial state (ON).

Therefore, even if the third detection means _S3 is turned ON, the contact RT- ₁ of the counting mechanism RT remains OFF.
R ₂ and relay R ₃ are not energized.

Next, the actuating piece P turns on the fourth detection means _S4 , but relays _R2 and _R3 are not energized due to the turning off of contact RT- ₁ .

When the polymer of document a and photosensitive paper b finishes printing, the photosensitive paper b is transferred to the photosensitive paper separation mechanism 33 as described above.
is separated and conveyed to the developing device 42.

The above-described copying operation is repeated until the final printing set in advance, and the operation piece P at the time of final printing is as follows.
will be explained from the point in time when the third detection means _S3 is turned on.

When the third detection means _S3 is turned ON, the count of the preset counting mechanism RT becomes 0 (initial state) and the contact RT- ₁ of the counting mechanism RT is switched ON.

Next, when the actuating piece P turns on the fourth detection means _S4 , the first detection means _S1 or the relay contact _R1-1 ,
Relay R ₂ is energized via fourth detection means S ₄ and contact RT- ₁ of counting mechanism RT.

By energizing relay R ₂ , relay contact R _2-1 is activated.
OFF, relay contact R _2-2 is ON, relay contact R _2-3 is ON.
It becomes ON. Relay R ₂ is self-maintained by relay contact R _2-2 . When relay contact R _2-3 is turned on, solenoid SL is energized and the above-described original separation mechanism 43 is activated. Furthermore, by energizing the solenoid SL, the abutting mechanism 47 is actuated to move the abutting plate 51 to the abutting position of the attached lever 21, and when the lever 21 abuts the abutting plate 51, the abutment mechanism 47 is actuated. The leading end is released from the locking mechanism 17, and in this state, the document separation mechanism 43 operates to send the document a to the discharge path 44 (see FIG. 5).

On the other hand, relay R ₃ is a delay type relay, with actuating piece P
is activated after passing through the first detection means _S1 and before reaching the second detection means, and when relay _R3 is energized, relay contact _R3-1 is turned OFF. , release the self-holding of the relay _R1 . Therefore, even if the actuating piece P turns on the first detection means _S1 , the cylindrical body 13 does not stop, and the second detection means
Turn on S ₂ , third detection means S ₃ , and fourth detection means S ₄
However, no action is taken and the cylindrical body 13 continues to rotate. During this time, completely eject the original.

Next, when the cylindrical body 13 comes to the stop position (start position), the actuating piece P is activated by the first detection means.
When S ₁ is turned OFF, the conveyor belt drive clutch
_C1 is broken and the conveyor belt 12 stops rotating,
The cylindrical body 13 stops with the first detection means _S1 turned off. Further, when the first detection means S ₁ is turned OFF, the self-holding of the relays R ₂ and R ₃ is released, the excitation of the solenoid SL is also released, and the operation of the document separation mechanism 43 and the hitting mechanism 47 is also released. It becomes the initial state.

As described above, according to the present invention, during the printing of a predetermined number of copies in a large number of copies, printing is repeated with the original wrapped around the printing cylindrical body, so that the printing time is minimized. In addition, when setting the original, the leading edge of the original is directly locked to the printing cylinder that is stopped at a predetermined position, making it possible to securely lock the original, and it is also extremely compact. It can be configured as follows. Moreover, since the original is locked and the original and the photosensitive paper are mechanically separated, it has many advantages such as reliable operation.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the diazo copying machine of the present invention, Fig. 2 is a simplified side view showing the internal mechanism, Fig. 3 is a simplified plan view of Fig. 2, and Fig. 4 is an explanation showing the photosensitive paper separation mechanism. 5 is an explanatory diagram showing the document separation mechanism, FIG. 6 is an explanatory diagram showing the arrangement of the detection means, etc., and FIG. 7 is an electric circuit diagram, in which 10 is a guide roller, 12 is a conveyor belt, and 13 is an electric circuit diagram. 15 is a cylindrical body for printing, 15 is a light source lamp, 17 is a document locking mechanism, 27 is a photosensitive paper automatic feeding mechanism, 33 is a photosensitive paper separation mechanism, 43 is a document separation mechanism, a is a document, and b is a photosensitive paper respectively.

Claims (1)

[Claims] 1. An original and photosensitive paper are overlapped and conveyed between a printing cylindrical body containing a light source tube and a conveyor belt that is stretched around the cylindrical body and several guide rollers, and then printed. In the diazo copying machine that performs printing, the cylindrical body is provided with a comb-shaped document leading edge locking piece that locks the leading edge of the document when the document is set, and winds and holds the document around the printing cylinder. a mechanism; an automatic paper feeding mechanism that automatically feeds photosensitive paper so as to overlap the document wound and held on the printing cylinder; a second detection means that operates the automatic photosensitive paper feeding mechanism; A preset counting mechanism that counts the number of copies, a third detection means that operates as a counting switch for the preset counting mechanism, a photosensitive paper separation mechanism that separates the photosensitive paper after printing from the printing cylinder, and a photosensitive paper separation mechanism that separates the printed original from the printing cylinder. a document separation mechanism including the comb-shaped document leading edge locking piece and alternating comb-shaped document separation pieces for separating the document from the cylindrical body;
a document separation actuation mechanism that moves the document leading edge locking piece to a document release position and operates the document separation mechanism; and a fourth detection device disposed behind the first, second, and third detection devices; a stop mechanism that stops the printing cylinder at a predetermined position where the locking mechanism locks the leading edge of a document; a first detection means that operates the stop mechanism; , an actuating piece for actuating each of the above-mentioned detection means; in a state where the preset counting mechanism does not count a predetermined number of sheets, the document separation actuation mechanism and the stop mechanism do not operate even if the fourth and first detection means detect;
The preset counting mechanism counts a predetermined number of sheets, and in response to a signal indicating the reset state and detection by the fourth detection means, operates the document separation actuation mechanism and disables the second detection means, and then operates the document separation actuation mechanism. A diazo copying machine comprising: a control circuit that operates a stop mechanism in response to detection by the first detection means.