JP3285641B2 - Plate discharging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing apparatus and the like, and more particularly to a stencil discharging apparatus for compressing and storing used stencil sheets.

[0002]

2. Description of the Related Art In a rotary stencil printing apparatus having a cylindrical plate cylinder, an ink supply means is generally provided inside the plate cylinder, and a stencil sheet is wound around the outer peripheral surface of an ink-permeable peripheral wall. I can do it. Then, printing is performed by rotating the plate cylinder and transporting the printing paper sandwiched between the printing cylinder and the press roller. In order to discard the used stencil sheet after printing, in the stencil printing apparatus as described above, generally, a stencil discharging means including a peeling claw, a conveying roller, and a stencil discharging box is provided near the plate cylinder. That is, the end of the stencil paper is peeled off from the surface of the rotating plate cylinder by a peeling claw, is peeled off from the plate cylinder by a take-up roller, and is further pushed directly into the plate discharge box for disposal.

[0003]

The used stencil sheet peeled off from the plate cylinder has printing ink adhered to one side thereof, and is fed into the stencil box with the ink-adhered surface facing down. Therefore, the stencil sheet first fed into the stencil box is stuck on the bottom surface of the stencil box with the ink-adhering surface uneven due to the adhesive force of the ink. Then, the stencil paper to be sent thereafter enters the stencil itself while pushing the stencil stencil stored earlier from the rear, but the stencil stencil for the first few plates is particularly strong. The stencil paper that has entered later cannot advance to the back. For this reason, although a lot of wasteful space remains in the back of the stencil box, the area near the entrance is full of stencil paper, and the space in the stencil box could not be used effectively and the number of sheets stored could not be increased. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a large stencil discharging device capable of reliably compressing and storing a used stencil sheet that has been used.

[0005]

According to the present invention, there is provided a plate discharging apparatus comprising: a conveying means for conveying a base paper removed from a printing apparatus; a container into which the base paper conveyed by the conveying means is fed; It is provided with compression means for compressing and transporting the fed base paper and driving means for swinging the compression means.

According to the present invention, the compression means includes a compression member having a base end rotatably attached to an inner surface of an upper wall close to an entrance of the container, and A guide member movably inserted into a guide hole provided in an upper wall between the compression member and one end protruding outside the container, and the other end pivotally attached to a free end of the compression member. May be used.

In the plate discharging device, the driving means may be configured to reciprocate the compression means repeatedly while the transport means is being driven.

In the plate discharging apparatus, the driving means may be operated after the leading end of the base paper enters the container by the conveying means.

In the plate discharging device, the driving means may be operated after the entire base paper is fed into the container by the conveying means.

[0010]

The stencil sheet removed from the printing apparatus is fed into the container of the stencil discharging apparatus, and is pressed against the compression means closing the path in the container or the stencil sheet fed earlier to be compressed. The compressed stencil sheet accumulated on the front side of the compression means is further compressed by the stencil sheet fed in later. When the driving means swings the compression means, the stencil sheet is further compressed, or the compressed stencil sheet is conveyed deep inside the container.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. First, the present embodiment relates to a rotary stencil printing apparatus 1 having a plate making device 2 and a plate discharging device 3, and FIG. 1 is a sectional view showing a schematic configuration thereof. In the figure,
Reference numeral 4 denotes a plate cylinder (also called a drum). The plate cylinder 4
Has a stencil locking device which is constituted by a cylindrical body having an ink-permeable porous structure and has a clamp plate 5 on a part of the outer peripheral surface for selectively locking one end of the stencil sheet S. The motor is rotationally driven clockwise in the figure around its own central axis by an electric motor not shown.

An ink supply device including a squeegee roller 6, a doctor rod 7, and an ink supply pipe 8 is provided inside the plate cylinder 4. The ink supply device supplies printing ink to the inner peripheral surface of the plate cylinder 4 according to the rotation of the plate cylinder 4. A stencil sheet S, one end of which is locked to the plate cylinder 4 by a clamp plate 5 of a stencil locking device, is wound around the outer peripheral surface of the plate cylinder 4 due to the viscosity of the printing ink. A press roller 9 is provided at a portion opposed to the squeegee roller 6 with the plate cylinder 4 interposed therebetween, that is, below the plate cylinder 4.
Stencil printing is performed in cooperation with the plate cylinder 4.

On one side of the plate cylinder 4, a base paper storage unit 10 is provided.
Is provided. The stencil storage unit 10 is configured to store a stencil sheet S in the form of a continuous sheet wound into a roll.

A plate making device 2 is provided between the base paper storage unit 10 and the plate cylinder 4. The plate making device 2 includes a thermal head 11 and a platen roller 12 as a thermal type plate making device.
The stencil sheet S is supplied from the stencil storage section 10, and the stencil sheet S is stencil-produced in a heat-sensitive manner.

A stencil stock device 13 is provided between the plate making device 2 and the plate cylinder 4. Base stock device 13
Is a box-shaped stencil paper stock unit 14 capable of storing a stencil paper S having a length corresponding to one stencil paper S in a meander shape.
A stencil feed roller 15 for feeding the stencil sheet S from the stencil making device 2 to the stencil stock section 14; and a stencil feed roller 16 for sending the stencil sheet S from the stencil stock section 14 to a stencil cutting device 17 described later. .

A stencil cutting device 17 is provided between the stencil delivery roller 16 of the stencil stock device 13 and the plate cylinder 4. The stencil cutting device 17 has a cylindrical rotary blade 18 having a helical blade on the outer peripheral surface and a flat blade 19 in contact with the rotary blade 18, and the stencil sheet S is cut by the two blades 18, 19. Is to be performed.

A plate discharging device 3 is provided on the side opposite to the plate making device 2 with the plate cylinder 4 therebetween. The plate discharging device 3 in the present embodiment includes a stencil stripping claw 20 for removing a used stencil sheet S from the plate cylinder 4 and a transporting unit for transporting the stencil sheet S peeled off by the stencil sheet stripping claw 20. A longitudinal feed roller 21; a container 22 for receiving the stencil sheet S conveyed by the longitudinal feed roller 21;
And a compression means 23 provided therein.

First, the vertical feed roller 21 is made of a plastic which is supported by a lower rotation shaft and an upper rotation shaft provided at an inlet portion 24 of a container 22 so as to be parallel to the axis of the plate cylinder 4 and engages with each other. It has a roller 25 and a rubber roller 26. The plastic roller 25 is driven to rotate clockwise in the figure by a plate discharging motor 27 as a driving means. As shown in the figure, the vertical feed roller 21 is provided at a position opposite to the stencil cutting device 17 with respect to the stencil locking device 5 of the plate cylinder 4 at the stencil discharge position.

The base paper stripping claw 20 has its base end pivotally supported by a pivot 20a, and the end opposite to the tip of the claw across the pivot 20a is drivingly connected to a plunger of a solenoid device 28. Have been. In this manner, the base paper stripping claw 20 is rotated between the base paper stripping position close to the plate cylinder 4 and the standby position rotated clockwise around the pivot 20a from the base paper stripping position. It is designed to be driven.

The container 22 has a structure in which an upper wall 30 as a cover member is attached to the upper surface side of the opening of the main body 29 via a hinge 30a so as to be openable and closable. It is free. An entrance 24 into which the used stencil sheet S is fed is open between the closed upper wall 30 and each end of the main body 29, and the above-described vertical feed roller 21 faces this portion. . A plurality of ridges 31 are formed on the bottom surface of the main body 29 of the container 22 in parallel with the feed direction of the stencil sheet S, so that the stencil sheet S fed into the inside is hard to adhere with ink. . A discharge lever 32 interlocked with the upper wall 30 is provided behind the container 22. When the upper wall 30 is opened, the tip of the discharge lever 32 swings upward from a lower position to peel off the stencil sheet S attached to the main body 29 of the container 22.

As shown in FIGS. 2 and 3, on the inner surface of the upper wall 30 of the container 22 close to the inlet 24, a compression member 40 of the compression means 23, which is a plate-like member, is provided at its base end. It is attached to a rotating shaft 41. Both ends of the rotating shaft 41 protrude out of the container 22, and operation levers 42 are respectively attached to the both ends. The respective ends of the operation levers 42 are connected to each other by a connection rod 43 outside the container 22. The rotation shaft 41 and the compression member 4
At 0, a torsion coil spring 44 as an urging means is interposed, and the compression member 40 is urged in a direction away from the inlet 24.

A guide member 45 is rotatably attached to the free end of the compression member 40. Guide member 45
Is a member obtained by bending a bar into a substantially U-shape, and both ends thereof are connected to the compression member 40. Upper wall 30 of container 22
, Two guide holes 46 are formed between the inlet 24 and the rotating shaft 41. The guide member 45 is movably inserted through these guide holes 46, and the compression member 4
When the zero swings about the rotation shaft 41, the guide member 45 protrudes and retracts from these guide holes 46, and guides the operation of the compression member 40 to stabilize it. As described above, since the compression member 40 is urged toward the back of the container 22 by the torsion coil spring 44, unless the rotational force opposite to the urging direction is applied to the rotating shaft 41, the guide member 4
Most of 5 is pulled into the container 22 by the spring force, and the tip portion comes into contact with the outer surface of the upper wall 30.

The plate discharging motor 27 is used as a driving means for driving the vertical feed roller 21 and for rotating the rotating shaft 41 to reciprocate the compressing means 23. A belt 49 wrapped around a pulley 47 of the plate discharging motor 27 and a pulley 48 provided on a drive shaft of the vertical feed roller 21 is also wrapped around a clutch 50. The output shaft of the clutch 50 has a gear 51
The driving disk 51 is configured to contact and rotate the circular gear 52. gear
A circular cam 53 is eccentrically provided on the side surface of the reference numeral 52 . On the side of the cam 53, an operation arm 54 is pivotally supported at a central portion and is swingably provided. When the cam 53 pushes one end of the operation arm 54, the operation arm 54 swings, and the other end of the operation arm 54 pushes up the operation lever 42.

When the operating lever 42 is lifted against the elastic force of the torsion coil spring 44, the compression member 40 swings toward the inlet 24 of the container 22, and at the same time, the guide member 45 is moved to the guide hole. Projecting out of the container 22 from 46. If the clutch 50 is disengaged here, the compression means 4
0 stops at that position.

Next, as shown in FIG. 1, a discharge jam sensor 60 comprising a light emitting device and a light receiving device is disposed at the position where the base paper is introduced by the vertical feed roller 21 in order to confirm the transfer of the base paper by the vertical feed roller 21. Have been. If the base paper cuts off the optical path of the discharge jam sensor 60 at the time of plate discharge, it is confirmed that the used base paper has been separated from the plate cylinder 4 and introduced into the longitudinal feed roller 21.

As shown in FIG. 1, a master sensor 61 for monitoring the surface of the plate cylinder 4 to confirm the presence or absence of a base paper is provided near the base paper stock device 13. In addition, both the discharge jam sensor 60 and the master sensor 61 change the state of the optical path when the base paper S blocks the optical path to OF.
F, and the other states are set to ON.

Further, as shown in FIG. 1, detection pieces 62 and 63 for position detection are embedded in an annular member forming one end face of the plate cylinder 4 (drum 4). The first sensor a and the second sensor c provided in proximity to are configured to detect the detection pieces 62 and 63, respectively. The first sensor a detects the detection piece 62 at a position where the clamp plate 5 is directly above the drum 4,
The second sensor c detects the detecting piece 63 at a position where the leading end of the base paper mounted on the plate cylinder 4 slightly passes through the leading end of the base paper peeling claw 20 at the base paper peeling position. In the present embodiment, the discharge jam sensor 60 is operated between the time when the clamp plate 5 is opened and the main motor drives the drum 4 and the second sensor c detects magnetism and the time when the first sensor a detects magnetism. If the optical path is not interrupted, a plate ejection error is determined when the first sensor a detects, and the plate ejection operation is stopped.

The stencil printing machine 1 described above is operated by control means (not shown). The control means is provided with information for performing various operations such as plate making, printing, plate discharging, etc. in advance, as well as information input by an operator, and the above-described discharge jam sensor 60, master sensor 61, first sensor a, An appropriate operation can be performed based on signals from sensors such as the second sensor c.

Next, the plate discharging operation of the plate discharging device 3 in the stencil printing apparatus 1 described above will be described. There are three types of the plate discharging operation in the present embodiment, and the respective types are classified, and the operation will be described with reference to the operation diagram shown in FIG. 4 and the flowcharts shown in FIGS. Note that S in the description and the drawings
1, S2,... Indicate each step in the flowchart. (1) A case in which the compression means 23 reciprocates repeatedly during rotation thereof in conjunction with the plate discharging motor 27. The clamp plate 5 is opened by a plate making signal generated by a control means (not shown) (S
2) After that, while the solenoid device 28 is excited,
The plate discharging motor 27 starts (S3). Solenoid device 2
When the magnet 8 is excited, the document stripping claw 20 moves from the standby position in FIG. 1 to the document stripping position. When the plate discharging motor 27 is started, the vertical feed roller 21 rotates, and at the same time, the cam 53 also rotates. Therefore, the compression means 27 follows the cam 53 via the operation arm 54 and the operation lever 42, and FIG. ), (B) and (c) reciprocate. After a predetermined minute time of less than one second elapses after the plate discharging motor 27 starts, the main motor starts (S5), and the drum 4 rotates. When the rotation of the drum 4 reaches a position where the detection piece 63 is detected by the second sensor c (hereinafter, referred to as a “second detection position”), the discharge jam sensor 60 checks whether there is a base paper (S7). At this time, the leading end of the stencil sheet S normally attached to the drum 4 is peeled off from the drum 4 by the stencil stripping claw 20 and guided to the vertical feed roller 21 to block the optical path of the discharge jam sensor 60. Therefore, the discharge jam sensor 60 detects the base paper, but if the base paper is not detected, the master sensor 61 checks the presence or absence of the base paper, and if "presence" is detected, it is determined that the base paper has not been peeled from the drum 4. The detection piece 62 is detected by the first sensor a.
The machine is urgently stopped at the output position (hereinafter, referred to as a "first detection position") and an error is displayed (S14).
Notify the operator of the condition. If the base paper is detected as “absent” in S13, the base paper is
Is not set, and it is not a trouble of the plate discharging operation, so that the rotation of the drum 4 continues as in the case where the discharging jam sensor 60 detects the base paper in S7, and the first detecting operation is performed.
When the rotation of the drum 4 reaches the exit position , the main motor stops. After a lapse of a predetermined time of several seconds, the discharge jam sensor 60 again checks for the presence of the base paper S (S11). If the base paper S is not detected there, the plate discharge motor 27 stops (S12), and the vertical feed roller 21 and the compression means 23 Also stop. If the base paper is detected in S11, this indicates that the base paper has not been completely fed into the container 22 due to some trouble. Therefore, the machine is stopped immediately and an error is displayed (S15). Inform others.

The base paper peeled off from the drum in this way is fed into the container 22 by the vertical feed roller 21 and is compressed by the compression means 23 which reciprocates in conjunction with the vertical feed roller 21 and 22 are sequentially transported to the back. Therefore, a storage space for the next paper to be fed next is secured near the entrance of the container 22 and the container 2
The base paper can be stored until no extra space is left in 2.

(2) The case where the compressing means 23 is waiting at a predetermined position and the compressing means 23 is operated after the leading end of the base paper enters the container 22 to some extent. After the clamp plate 5 is opened by the generation of the plate making signal (S102), the solenoid device 28 is excited to move the base paper stripping claw 20 to the base paper stripping position, and the plate discharging motor 27 is started (S1).
03), the vertical feed roller 21 operates in conjunction with this.
After a lapse of a predetermined minute time of less than 1 second from the start of the plate discharging motor 27, the main motor starts (S105), and the drum 4 rotates. When the rotation of the drum 4 reaches the second detection position, the discharge jam sensor 60 checks for the presence or absence of base paper (S
107). At this time, if no base paper is detected, the master sensor 61 checks for the presence or absence of base paper (S113).
If "presence" is detected, it is considered that the base paper has not been peeled off from the drum 4 , and the machine is emergency stopped at the first detection position and an error is displayed (S114) to notify the operator of the state. Further, when the base paper is detected as “absent” in S114, it means that the base paper has not been set on the drum 4 from the beginning, and it is not a trouble of the plate discharging operation.
The rotation of the drum 4 is continued similarly to the normal state where the discharge jam sensor 60 detects the base paper in S107, and the main motor is stopped when the first detection position is reached.
When the discharge jam sensor 60 detects the base paper at 07, the clutch 50 is engaged with a slight time delay (S10).
9) As a result, the compression means 23 starts operating in conjunction with the plate discharging motor 27. Eventually, when the base paper is completely fed into the container 22, the detection state of the base paper by the discharge jam sensor 60 becomes "no base paper" (S110). From this time, the number of operations of the compression unit 23 is counted by a counter (not shown), and after the value reaches a preset number, the compression unit 2
3 comes to a predetermined position (S112), the solenoid device 2
8 is demagnetized, the plate discharging motor 27 is stopped, and the clutch 50 is disengaged (S113). Even if the drum 4 reaches the first detection position after substantially one rotation, if the state of the discharge jam sensor 60 is "presence of base paper" (S117), the base paper has been completely fed into the container 22 due to some trouble. Since there is no such information, the machine is stopped and an error message is displayed to notify the operator (S118).

(3) The case where the compression means 23 is operated after the base paper is completely fed into the container 22. After the clamp plate 5 is released by the generation of the plate making signal (S202), the solenoid device 28 is excited and the plate discharging motor 27 is started (S203), so that the document stripping claw 20 is brought into the state shown in FIG. Is moved from the standby position to the document stripping position, and the vertical feed roller 21 operates. After a lapse of a predetermined minute time of less than one second from the start of the plate discharging motor 27, the main motor starts (S205), and the drum 4 rotates. When the rotation of the drum 4 reaches the second detection position, the discharge jam sensor 60 checks whether there is a base paper (S2).
07). At this time, if the base paper is not detected, the master sensor 61 checks the presence or absence of the base paper (S214), and if the presence is detected, it is considered that the base paper remains without being separated from the drum 4, And an error is displayed (S215) to notify the operator of the state. If the master sensor 61 does not detect the base paper in S214, the discharge jam sensor 6
0 is the same as the normal state where the base paper is detected.
The main motor is stopped at the time when the rotation reaches the first detection position after making one rotation (S209), and the discharge jam sensor 60 checks again whether there is a base paper (S21).
0). If the base paper is not detected, the clutch 50 is engaged (S211), and the cam 53 rotates in conjunction with the plate discharging motor 27, and the compression means operates following the rotation. The compression means 23 operates in conjunction with the plate discharging motor 27. Then, from this time, the counter counts the number of times the compression unit 23 is operated. When the compression means 23 operates a predetermined number of times, and as a result, the value of the counter reaches a preset number of times, the plate discharging motor 2
7 is stopped and the clutch 50 is disengaged (S21
3) The machine operation ends. If the discharge jam sensor 60 is in the state of "base paper present" in S210, it indicates that the base paper has not been completely fed into the container 22, so that the machine is urgently stopped and an error is displayed. (S216) Notify the worker.

In this plate discharging operation, similarly to the plate discharging operation (2), means for detecting that the compressing means 23 is at a predetermined position is provided, and after the step S212, the compressing means 23 comes to the predetermined position. If it is detected that the clutch is turned off in S213, the base paper can be fed into the container 22 with the compression unit 23 kept at the best position.

Further , S10 to S12 of the steps in FIG.
As shown in FIG. That is, the compression means 23
Step S31 is provided with a means for detecting the position.
0 is detected as "no base paper", the compression means 23
When the position is reached, the plate discharging motor is stopped (S312).
According to this, when the compression means 23 is not operated, the predetermined position is set.
And start operation from the standby position at the time of plate discharging
Can be done.

In any of the stencil discharging operations described above, the used stencil sheet S is transferred to the reciprocating compression means 23.
The compressed air is sent to the space near the inlet 24 secured by the compression means and compressed, and further compressed by the reciprocating motion of the compression means 23 and transported to the interior of the container 22. In addition,
Since the action of the compression means 23 for pushing the base paper S into the interior of the container 22 is due to the elastic force of the coil spring 44, the stroke of the compression means 23 gradually decreases as the base paper S accumulates in the container 22. Therefore, the space in the container 22 is used without any need. The operation of the compression member 40 is stabilized by the support of the guide member 45. Further, since the guide member 45 is provided, even when the compression member 40 moves from the state shown in FIG. 4A to the state shown in FIG. 4B, the base paper S at the entrance 24 is moved between the compression member 40 and the upper lid 30. Therefore, the base paper S fed into the container 22 by the vertical feed roller 21 is reliably compressed and conveyed to the back of the container 22.

[0036]

According to the present invention, since the reciprocating compression means is provided inside the container into which the used base paper is fed, the fed base paper is compressed and strongly pushed deep into the container, and the vicinity of the entrance is provided. The next storage space is secured. For this reason, the space in the container is sufficiently used to the back, and a large amount of base paper can be stored.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a structure near a plate discharging device according to an embodiment of the present invention.

FIG. 3 is a perspective view showing the structure of a plate discharging device according to one embodiment of the present invention.

FIG. 4 is a sectional view showing the operation of the plate discharging device according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a first example of an operation in one embodiment of the present invention.

FIG. 6 is a flowchart showing a second example of the operation in the embodiment of the present invention.

FIG. 7 is a flowchart showing a third embodiment of the operation according to the embodiment of the present invention;

FIG. 8 shows a fourth embodiment of the operation in the embodiment of the present invention;
It is a flowchart which shows.

[Explanation of symbols]

 3 Plate discharging device 21 Vertical feed roller 22 as conveying means 22 Container 23 Compressing means 24 Inlet 27 27 Plate discharging motor as driving means 30 Upper wall 40 Compressing member 45 Guide member 46 Guide hole S Base paper

Claims (4)

(57) [Claims] 1. A conveying means for conveying a base paper removed from a printing apparatus, a container into which the base paper conveyed by the conveying means is fed, and a base paper provided swingably in the container and fed and conveyed. Compression means for oscillating the compression means, and the driving means for swinging the compression means , wherein the compression means
The base end is rotatably mounted on the inner surface of the upper wall near the mouth
Compression member, an inlet portion of the container, and the compression member
Is movably inserted into the guide hole provided in the upper wall between
One end protruding out of the container and the other end
A guide member rotatably attached to the free end of the contraction member
And a plate discharging device. 2. A conveying means for conveying the base paper removed from the printing apparatus, a container into which the base paper conveyed by the conveying means is fed, and a base paper swingably provided in the container for compressing and conveying the fed base paper. a compression means for, provided with driving means for swinging the compression means, the base paper of previously by the transport means
The drive means is activated after the end enters the container
Plate discharging device configured as follows . 3. A transporting means for transporting the stencil removed from the printing apparatus, a container into which the stencil transported by the transporting means is sent, and a stencil provided slidably in the container for compressing and transporting the stencil fed in. a compression means for, provided with driving means for swinging the compression means, the entire base paper by the transfer means
Is driven into the container and then the driving means operates.
Plate discharging device configured to be 4. The method according to claim 1 , wherein the driving means is driven while the transport means is being driven.
The plate discharging device according to claim 1 , 2 or 3, wherein the compression means is configured to reciprocate repeatedly .