JP3447399B2 - 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 machine provided with a stencil printing machine or the like and for compressing and storing a used stencil sheet conveyed from a printing section or the like.

[0002]

2. Description of the Related Art A general rotary stencil printing machine is provided with a cylindrical plate cylinder which is partially permeable to ink. Ink supply means is provided inside the plate cylinder to supply ink to the inner peripheral surface of the plate cylinder. On the outer periphery of the plate cylinder, the stencil sheet that has been made is wrapped. Near the plate cylinder, a pressing means for pressing the paper against the plate cylinder is provided. As the plate cylinder rotates, paper is supplied between the plate cylinder and the pressing means. The pressing means presses the paper against the base paper of the plate cylinder. The ink supplied to the inner surface of the plate cylinder is
It passes through the plate cylinder and the punching part of the base paper and is transferred to the paper. The stencil printing corresponding to the perforated portion of the plate-made base paper is applied to the paper. In order to discard the used base paper after printing is completed, plate discharge means having a peeling claw, a conveying roller and a plate discharge accommodating portion is provided in the vicinity of the plate cylinder.

As the plate discharging means, for example, Japanese Patent Laid-Open No. 6-19
A plate ejection device as disclosed in Japanese Patent No. 9029 is known.
FIG. 12 shows this plate discharge device. Used base paper S
The sheet is sent from the entrance 203 to the inside of the plate discharge storage section 201 by the conveyance roller 202. The base paper S is the entrance 20
3 collides with the compression plate 204 in the vicinity of 3, and is prevented from entering the compression plate 204, whereby the space 205 is compressed into a bellows shape.
In this state, the next used base paper is sent to the storage section 201, and the base paper stored before is further compressed accordingly.

As the amount of base paper fed into the space 205 increases, the pressure applied to the base paper S in front of the compression plate 204 gradually increases. When it overcomes the holding force of the base paper due to the weight of the compression plate 204, the compression plate 204 resists the holding force by the base paper S toward the back side of the plate discharge storage unit 201 opposite to the inlet section 203, as shown in FIG. And then rotated. The base paper S is sequentially compressed and moved to the back side.

[0005]

The used base paper peeled off from the plate cylinder has ink adhered thereto, and the ink is adhered or caught by the conveying mechanism due to the adhesive force of the ink during the conveyance. In addition, since the amount of ink adhered differs for each base paper, the base paper is not always stored in the plate discharge storage portion in the same state. Further, the compression of the base paper performed by the conveyance roller and the compression plate is not perfect, and the compressed base paper may be restored to its original state later, which may become jammed in the conveyance path and cause a defect in the subsequent plate discharging operation. It was

It is an object of the present invention to provide a stencil ejector capable of reliably compressing and storing a stencil sheet to which ink or the like is attached.

[0007]

A plate discharge apparatus according to a first aspect of the present invention is provided with a plate discharge storing section having a conveying means for conveying a raw paper to be discarded and a storage space for storing the raw paper conveyed by the conveying means. And a compressing unit that moves in the storage space of the plate storage unit to compress the base paper in the storage space, and the plate discharge in a direction parallel to the paper surface of the base paper to be transported and orthogonal to the transport direction of the base paper. The width of the storage portion is widened along the direction in which the compression means moves to compress the raw paper.

According to a second aspect of the present invention, there is provided a plate discharge apparatus, a plate discharge storing section having a conveying means for conveying the raw paper to be discarded, a storage space for storing the raw paper conveyed by the conveying means, and the plate discharge storing section. and a compression means for compressing the stencil in said receiving space by moving in the storage space, the compressing means
Is an axis and a compression plate rotatable about the axis by a predetermined angle
The plate discharge storage portion has a rotating compression plate.
It has a peripheral wall that matches the trajectory of the tip of the.

The plate discharge device according to claim 3 is discarded.
Transporting means for transporting the base paper to be
Plate discharge storage unit with storage space to store the transported base paper
And moving in the storage space of the plate discharge storage section
A compression means for compressing the base paper inside, the compression means has an axis and a compression plate rotatable about the axis by a predetermined angle, and the plate discharge storage portion has a bottom surface or a front surface. Column
Is a peripheral wall which is formed of a part of the peripheral surface of the compression plate and conforms to the locus of the tip of the rotating compression plate.
Is closed and the upper surface of the rectangular shape is open and discarded.
It is an opening that serves as an entrance for the base paper that
And a space through which the rotating compression means passes.
Are substantially matched .

[0010]

[Function] The base paper to be discarded is conveyed by the conveying means,
It is stored in the storage space of the plate discharge storage section. The compression means rotates around the shaft in the storage space and moves along the inner surface of the plate discharge storage portion. The stencil sheet storage section has a wider width as it goes deeper in the compression direction, and can store a large amount of base paper.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a stencil printing machine 100 having a plate discharge apparatus 1 according to an embodiment. The plate cylinder 101 is a cylindrical body having a multilayer structure including a porous screen and the like. A base paper locking portion 102 is provided on the outer peripheral surface of the plate cylinder 101. The front end of the stencil printing base paper S thus prepared is fixed to the plate cylinder 101 by the base paper locking portion 102. After the leading end of the stencil printing base paper S is fixed to the plate cylinder 101 by the base paper locking portion 102, the plate cylinder 101 rotates and the stencil printing base paper S is wound around the outer peripheral surface of the plate cylinder 101. Ink supply device 1 having squeegee roll, doctor roll, etc. inside the plate cylinder 101
03 is provided, and ink is supplied to the inner peripheral surface of the plate cylinder 101. A press roll 104 as a pressing unit is provided below the plate cylinder 101. The press roll 104 moves up and down in synchronization with the supply of the paper P or the rotation of the plate cylinder 101, and presses the paper against the plate cylinder 101.

The paper feeding mechanism of the stencil printing apparatus 100 will be described. In FIG. 1, on the lower left side of the plate cylinder 101, the paper P
A paper feed table 105 for loading the sheets is provided. Paper feed stand 10
A scraper unit 106 that separates and feeds the sheets P one by one from the sheets P stacked on the sheet feed table 105 above the sheet feeder 5.
Is provided. The paper P separated by the scraper unit 106 is provided next to the scraper unit 106.
The plate cylinder 101 and the press roll 104 at a predetermined timing.
A timing roll 107 for feeding the sheet is provided between the sheets.

The paper discharge mechanism of the stencil printing machine 100 will be described. In FIG. 1, on the lower right side of the plate cylinder 101, a separation claw 108 that approaches the leading edge of the printed paper P to separate the paper P from the plate cylinder 101, and a separation fan 109 that separates the paper P from the plate cylinder 101. Is provided. Below the separation claw 108, a conveyance mechanism 111 that conveys the sheet P separated from the plate cylinder 101 is provided. The transport mechanism 111 has a suction unit 111a for suction-holding the sheet P to be transported. A paper ejection tray 112 is provided adjacent to the conveyance mechanism 111 in the conveyance direction, and receives the printed printing paper P that has been conveyed and mounts it.

Further, in FIG. 1, a base paper supply unit 113 for storing a roll-shaped base paper is provided above the paper discharge mechanism 111, and the base paper S is sent to the left side in the drawing. Next to the base paper supply unit 113, a plate making device 114 for making the base paper S sent from the base paper supply unit 113 is provided. The plate making device 114 is composed of a thermal head and a platen roller, and produces an image corresponding to the original document on the stencil printing base paper S.
(Hereinafter, referred to as the base paper S.) Plate making device 114
A guide plate 11 for guiding the plate-making base sheet S is provided next to the plate.
5 are provided. Guide plate 115 and plate making device 114
A cutter 116 for cutting the base paper S is provided between them. A discharge roll 117 is provided adjacent to the guide plate 115, and sends the plate-making base paper to the plate cylinder 101.
The guide plate 115 can be swung with one end on the discharge roll 117 side as a fulcrum, and if the end on the plate making device 114 side is lowered,
The plate-making base paper S can be fed into the base-paper accumulating section 118.

The stencil sheet S supplied from the stencil sheet supplying section 113 is made into a plate by a plate making device 114. Plate-making S
When the leading end of the paper is sent to the discharge roll 117 and reaches the base paper locking portion 102 of the plate cylinder 101, the base paper locking portion 102 fixes the front end of the base paper S. The preprocessed base paper is sent to the plate cylinder 101 while rotating the plate cylinder 101. When the preprocessed base paper S having a length of one plate is sent, the rotation of the plate cylinder 101 is stopped, the base paper S is cut by the cutter 16, and the remaining portion is wound around the plate cylinder 101.

Next, the plate discharge device 1 will be described. In FIG. 1, the plate discharge device 1 is a scraper unit 10 of a paper feed mechanism.
It is provided above 6 and the like, and at a position occupying the left side of the plate cylinder 101. The plate discharge device 1 is a used base paper S.
Is a device for peeling from the outer peripheral surface of the plate cylinder 101 and discarding. This plate discharge device 1 uses a used base paper S for a plate cylinder 101.
A transporting device 2 for peeling off and transporting it, and a plate discharge container 40 for storing the used base paper S transported by the transporting device 2
And a compression plate 50 for compressing the base paper inside the plate discharge container 40.

The conveying device 2 is composed of a plurality of round endless rubber belts (hereinafter referred to as belts) and first and second conveying means 10 and 20 composed of a plurality of pulleys. As shown in FIGS. 1 and 2, the first transfer means 10 is
It is attached to the plate discharge pressure plate 3 provided above the plate cylinder 101. The plate discharge pressure plate 3 is a lid that constitutes the upper surface of the casing of the stencil printing apparatus 1, and has a right end rotatably connected to the casing as shown in FIG.

As shown in FIG. 2, an upper first rotary shaft 11 is rotatably provided at the right end of the plate discharge pressure plate 3. The upper first rotary shaft 11 is parallel to the central axis of the plate cylinder 101.
The upper first rotary shaft 11 is provided with four upper first pulleys 12 at predetermined intervals.

An upper second rotary shaft 13 is rotatably provided next to the upper first rotary shaft 11 (left in FIG. 2) in the plate discharge direction. The upper second rotating shaft 13 is parallel to the upper first rotating shaft 11. The upper second rotating shaft 13 is provided with four upper second pulleys 14 at predetermined intervals. Upper second
The pulley 14 has two rows of grooves so that two belts can be hung on it.

Next to the upper second rotary shaft 13 (left in FIG. 2) in the plate discharge direction, four upper third pulleys 15 are provided at predetermined intervals. Each upper third pulley 15
Is attached to a plurality of support plates 4 fixed to the plate discharge pressure plate 3 so as to be rotatable about each axis. Each axis of each upper third pulley 15 is parallel to the upper first rotating shaft 11 and the upper second rotating shaft 13.

As shown in FIGS. 2 and 3, belts 16 are wound around the respective upper third pulleys 15 and the respective upper second pulleys 14, which correspond to each other in the axial direction. The respective upper second pulleys 14 and the respective upper first pulleys 1 whose axial positions correspond to each other.
A belt 17 is wound around each of the two. When the upper second rotary shaft 13 is driven, the upper first pulley 12 and the upper second pulley 12 are driven.
The pulley 14 and the upper third pulley 15 rotate in the same direction, and the belts 16 and 17 also circulate and rotate in the same direction. In FIG. 2, each pulley 12, 14, 15 and each belt 16,
17 rotates clockwise.

As shown in FIG. 2, the second transfer means 20 is
The structure 5 of the stencil printing apparatus 1 is provided below the first conveying unit 10. The structure 5 is a member having a substantially L-shaped cross section which is parallel to the rotary shafts 11, 13 and 15.

As shown in FIGS. 2 and 3, the structure 5
On the upper surface of the column, four column-shaped pillar portions 24 are arranged at predetermined intervals.
Is fixed. A coil spring 25 as an urging means is inserted into each pillar portion 24, and a plate member 26 is attached to the pillar portion 24 via the coil spring 25.

As shown in FIG. 2, the plate member 26 is a member in which both edges of a thin thin plate material are bent at a right angle in the same direction along the longitudinal direction. Four holes are formed at predetermined intervals in the center of the plate member 26. The column portions 24 are inserted into the holes, and the plate member 26 is supported by the coil spring 25. When a force that pushes the plate member 26 downward is applied, the plate member 26 receives an upward biasing force due to the elasticity of the coil spring 25.

As shown in FIG. 2, the plate cylinder 10 of the plate member 26.
The lower first rotary shaft 21 is attached to the surface on the first side via the support member 29.
Is rotatably provided. The lower first rotary shaft 21 is parallel to the upper second rotary shaft 13, and the upper second rotary shaft 1
It is located directly below 3. The lower first rotary shaft 21 is provided with four lower first pulleys 22 at predetermined intervals. Each lower first pulley 22 is vertically adjacent to each upper second pulley 14.

As shown in FIGS. 2 and 3, three support members 27 and 28 are fixed on the side of the plate member 26 opposite to the plate cylinder 101, that is, on the left side in FIG. The central support member 27 has a central base portion 27a and two support portions 27b, 27b protruding forward from both sides thereof. The two support members 28, 28 on both sides have a base portion 28a,
One support portion 28 that continuously protrudes forward from the base portion 28a
b.

As shown in FIGS. 2 and 3, one lower second pulley 30 is provided on each of the supporting portions 27b and 28b of the supporting members 27 and 28. The four lower second pulleys 30 have respective supporting portions 27 with independent rotating shafts.
It is rotatably attached to b and 28b. The rotation axes of the four lower second pulleys 30 are independent of each other, but their axes coincide. Each lower second pulley 30 is in contact with each upper third pulley 15, and the coil spring 25 supporting the plate member 26 provided with each lower second pulley 30 is in a bent state. Therefore, each lower second pulley 30 presses each upper third pulley 15 with a predetermined biasing force due to the elasticity of the coil spring 25.

The plate member 26 is made of a metal plate exhibiting a predetermined elasticity against bending. Therefore, the three support members 27 and 28 attached to the front surface of the plate member 26 are
By deforming each part of 6 so as to be recoverable, it is possible to displace them independently. Therefore, the four lower second pulleys 3 provided on the supporting members 27 and 28 are
0 can also move independently. The two lower second pulleys 30, 30 in the center are provided on the common support member 27, and the movements of both pulleys affect the other, but they do not always move similarly.

As shown in FIGS. 2 and 3, belts 31 are respectively wound around the lower first pulleys 22 and the lower second pulleys 30 corresponding to the axial positions. Belt 3
1 circulates through the notches provided on the plate member 26 and on the front surface of the plate member 26. If the lower first rotary shaft 21 is driven,
The lower first pulley 22, the lower second pulley 30, and the belt 31 rotate in the same direction. In FIG. 1, each pulley 22, 30
And the belt 31 rotates counterclockwise.

The support plate 4 that supports the upper third pulley 15 and the support portions 27b and 28b that support the lower second pulley 30 are arranged symmetrically with respect to the center line of the base paper which is parallel to the transport direction of the base paper. Therefore, the force that the base paper being conveyed receives from the support plate 4 and the supporting portions 27b and 28b does not bend the conveyance direction of the base paper. The base paper being conveyed is supported by the support plate 4 or the support portion 27
b and 28b are not easily caught and can be transported smoothly.

Each of the belts 16, 17 and 31 is preferably made of a material having high durability and solvent resistance and having large friction and being hardly deformed. In addition, each of the pulleys 12 and 1
3, 15, 22, and 30 are preferably made of a material such as polyacetal having high solvent resistance and high friction as in the belt.

As shown in FIGS. 2 and 3, below the lower first rotary shaft 21, two separation claws 23 for peeling the base paper from the plate cylinder 101 are provided. The two separation claws 23 are fixed to the structure 5, and their wedge-shaped tips are directed to the top of the plate cylinder 101. When the base paper locking portion 102 is released, the stencil printing base paper S wound around the plate cylinder 101.
The tip of is free. When the plate cylinder 101 continues to rotate,
The leading edge of the stencil printing base paper S is guided by the two separating claws 23 and guided between the first conveying means 10 and the second conveying means 20.

As shown in FIGS. 2 and 3, the plate discharge pressure plate 3 provided with the first conveying means 10 is provided with a compression plate 50 as a compression means so as to be rotatable around the shaft 34 by a predetermined angle. Has been. The compression plate 50 is located on the downstream side of the first transport means 10 in the transport direction of the first transport means 10.
The compression plate 50 has the home position at the position shown in FIG. The compression plate 50 at the home position does not interfere with the transportation of the base paper S by the transportation device 2.

As shown in FIGS. 2 to 4, the rear edge of the compression plate 50 is rotatably attached to the shaft 34 mounted on the plate discharge pressure plate 3. As shown in FIGS. 3 and 5,
Two springs 36 are passed around the shaft 34. One end of the spring 36 is hooked on a plate member 34 a fixed to the shaft 34. The other end of the spring 36 is hooked on a notch 50a formed on the rear end edge of the compression plate 50. In addition,
In the home position, the elastic force of the spring 36 acts to urge the compression plate 50 downward.

At the leading edge of the compression plate 50 on the plate cylinder 101 side,
Plural (10 in this embodiment) scraping ribs 51 are provided so as not to hit the conveying device. As shown in FIG. 2, the scraping rib 51 of this embodiment has a triangular shape protruding downward. As will be described in detail later, as shown in FIG. 2, the plate discharge container 40 that stores the base paper S has a peripheral wall along the tip of the rotating compression plate 50. Therefore, the base paper does not enter the gap between the scraping rib 51 of the rotating compression plate 50 and the plate discharge container 40.
The compression plate 50 surely moves the base paper inside the plate discharge container 40,
Can be compressed.

Since the scraping ribs 51 have a triangular shape, the base paper can be reliably taken into the plate discharge container 40 by the rotation of the compression plate 50 and compressed, and the compressed base paper is further transferred to the shaft 34 at the upper rear side of the plate discharge container 40. It can be moved toward. Therefore, many stencil sheets can be compressed and stored in the plate discharge container 40. Although the shape of the scraping rib 51 is not necessarily limited to the triangular shape, it is preferable that the scraping rib 51 has such a function and effect. In addition, the inner surface of the compression plate 50,
That is, a grid-like rib is provided on the surface of the plate discharge container 40 side. The ribs are made of compressed paper 5
Prevents sticking to the inner surface of 0.

As shown in FIGS. 2 and 3, a part of the compression plate 50 close to the shaft 34 is provided with a projection 35 protruding toward the plate discharge pressure plate 3 in order to detect the rotational position of the compression plate 50. It is provided. As shown in FIG. 8, the protrusion 35 is detected by the full tank sensor 38.

As shown in FIGS. 2 and 3, the shaft 34 has:
A detection plate 37 is fixed to detect the rotational position of the shaft. As shown in FIGS. 2, 8 and 9, the detection plate 37 is detected by the compression sensor 39.

As shown in FIG. 2, at a position adjacent to the carrying device 2 and below the compression plate 50 at the home position, a stencil sheet storage unit for storing the used stencil printing base paper S. A plate discharge container 40 is provided.
In the circular end face of the cylinder, the cylinder is divided into four by two faces each including two diameters orthogonal to each other and perpendicular to the end face.
When divided, four solid bodies each having a fan shape with a central angle of 90 ° are obtained. The plate discharge container 40 of this embodiment has an outer shape similar to this three-dimensional shape. That is, as shown in FIGS. 1 and 2, the bottom surface or the front surface of the plate discharge container 40 is a peripheral wall 40a formed of a part of the peripheral surface of a cylinder, and the substantially rectangular back surface and the substantially fan-shaped both side surfaces are closed. The upper surface of the substantially rectangular shape is open and serves as an opening 40b that serves as an inlet for the waste base paper.

The shape of the peripheral wall 40a of the plate discharge container 40 is the shaft 3
4 substantially coincides with the locus of the tip of the compression plate 50 that rotates around 4. The storage space of the plate discharge container 40 that stores the base paper and the space that the rotating compression plate 50 passes through substantially coincide with each other. Therefore, the base paper S stored in the plate discharge container 40 is reliably compressed by the compression plate 50 that moves substantially along the inner surface of the plate discharge container 40.

FIG. 6 is a view of the plate discharge container 40 as viewed from above. Paper surface of the base paper being conveyed (matches the paper surface of Fig. 6)
When the direction parallel to the direction and orthogonal to the transport direction A of the base paper S is defined as the first width direction of the plate discharge container 40, the first width of the plate discharge container 40 gradually increases in the transport direction A of the base paper. There is.
That is, the first width of the plate discharge container 40 is widened along the direction in which the compression plate 50 moves to compress the base paper.

Further, as described above, the peripheral wall 40a of the plate discharge container 40 substantially coincides with the locus of the tip of the compression plate 50 which rotates about the shaft 34. In other words, referring to FIG. 2, when the vertical direction in the figure perpendicular to the paper surface of the base paper S to be conveyed is defined as the second width direction of the plate discharge container 40, the second width of the plate discharge container 40 is determined. Are spread along the direction in which the compression plate 50 moves to compress the base paper.

Since the plate discharge container 40 of this embodiment is set in the shape as described above, it can be easily attached to and detached from the stencil printing machine. Further, when the compression plate 50 compresses, a capacity for accommodating a larger amount of base paper can be obtained, and when the compression plate 50 returns, the base paper compressed in the plate discharge container 40 is moved to the opening 40b side. It will be difficult to return.

As shown in FIG. 6, a guide 42 is formed on the side surface of the plate discharge container 40. The guide 42 engages with a slit (not shown) provided on the main body side of the stencil printing machine. The plate discharge container 40 can be moved in a substantially horizontal direction with respect to the main body of the stencil printing apparatus by the guide 42 and the slit, and can be freely attached to and detached from the main body. Waste container 4
On the back surface of 0, there is provided a handle 41 which is gripped by the operator when the stencil discharge container 40 is attached to and detached from the main body of the stencil printing apparatus. Whether or not the plate discharge container 40 is mounted at a predetermined position in the stencil printing apparatus can be determined based on an output signal from a sensor or the like that detects the position of the plate discharge container 40.

As shown in FIG. 11, an L-shaped mounting plate 4 is provided on the main body of the stencil printing machine to which the plate discharge container 40 is attached and detached.
7 is rotatably attached at its corners via a shaft 48. A plate discharge pressure plate switch 46 is provided at one end of the mounting plate 47. A torsion coil spring 48 a provided on the shaft 48 biases the plate discharge pressure plate switch 46 provided at one end of the mounting plate 47 upward. The protrusion 49 provided on the plate discharge pressure plate 3 is set to a predetermined position when the plate discharge pressure plate 3 is closed.
Press the actuator of 6 directly. The guide 42 of the plate discharge container 40 is provided with a guide when the plate discharge container 40 is attached to the stencil printing machine.
By pressing the other end of the mounting plate 47, the mounting plate 4
7 is rotated in the urging direction of the spring 48a toward the plate discharge pressure plate switch to set the plate discharge pressure plate switch 46 to the predetermined position. Therefore, the plate discharge pressure plate switch 46 can detect both the opening and closing of the plate discharge pressure plate 3 and the state of attachment and detachment of the plate discharge container 40. In other words, if the plate discharge container 40 is mounted and the plate discharge pressure plate 3 is not closed, the plate discharge pressure plate switch 46
Does not turn on.

As shown in FIG. 6, a plurality of ribs (9 in this embodiment) ribs 43 are provided in the plate discharge container 40. The rib 43 is formed at a position where it does not interfere with the scraping rib 51 of the compression plate 50. The ribs 43 prevent the base paper S stored in the plate discharge container 40 from sticking to the peripheral wall 40a of the plate discharge container 40 over a wide area, and have a function of smoothly carrying and compressing the base paper S by the compression plate 50. Have. When the plate discharge container 40 is attached to or detached from the stencil printing machine,
A cutout portion 44 is provided in an upper portion of the peripheral wall 40a of the plate discharge container 40 so that 0 does not interfere with the transport device 2.

As shown in FIG. 2, when the plate discharge container 40 is mounted on the stencil printing machine, a part of the downstream side of the transport device 2 is located at the front end of the opening 40b of the plate discharge container 40. The lower second pulley 30, the supporting portions 27b and 28b holding the lower second pulley 30, the upper third pulley 15 and the belts 16 and 31 are included in a part of the downstream side of the transport device 2. The front end of the opening 40b of the plate discharge container 40 where these members are located is also the position where the tip of the compression plate 50 passes.
Therefore, the part of the transport device 2 on the downstream side in the transport direction including the supporting portions 27b, 28b and the like prevents the base paper S stored in the plate discharge container 40 from returning from the opening 40b to the outside of the plate discharge container 40. It becomes a means to hold down.

That is, the compression plate 50 returns to the home position after compressing the base paper S in the plate discharge container 40. At this time, the base paper adhered to the compression plate 50 together with the compression plate 50
It may be taken out of 0. However, in the present embodiment, a part of the conveying device 2 is arranged in the vicinity of the front end of the opening 40b of the plate discharge container 40 where the leading end of the compression plate 50 moves in and out. Although a part of the transport device 2 does not interfere with the leading end of the compression plate 50, it can press the base paper S and stop it inside the plate discharge container 40.

As shown in FIG. 2, a reflective master sensor 32 is provided on the vertical surface of the structure 5. The master sensor 32 detects whether or not the base paper S is mounted on the outer peripheral surface of the plate cylinder 101.

Next, the plate discharge operation in the plate discharge device 1 of the stencil printing machine will be described. The plate discharge operation is started when the plate making button is pressed or when the confidential process (process of winding the unmade plate paper around the plate cylinder 101) button is pressed. For example, set the desired document on the platen,
When a start button (not shown) is pressed, first, the plate cylinder 101 rotates counterclockwise in FIG. Along the way,
The master sensor 32 shown in FIG. 2 detects the presence or absence of the base paper S on the outer peripheral surface of the plate cylinder 101.

After it is judged that "the base paper is present" (that is, the base paper to be discharged) is wound, the base paper locking portion 102
When the sheet reaches the top of the plate cylinder 101, the rotation of the plate cylinder 101 stops. Next, the base paper locking portion 102 is opened, and the leading end of the base paper S is released.

Simultaneously with the opening of the base paper S, the upper second rotary shaft 13 or the lower first rotary shaft 21 is driven by a drive means (not shown), and the entire transporting device 2 starts to drive in the base paper transport direction.
At this time, the upper first pulley 12 and the belt 17 wound around the upper first pulley 12 correct the curl of the disengaged base paper S and the excessive lifting of the leading end.

The plate cylinder 101 rotates counterclockwise. The base paper S with its leading end lifted is guided by the separation claw 23 and sent to the transport device 2. The base paper S is sent in the direction of the plate discharge container 40 by the transport device 2 and is peeled off from the plate cylinder 101. When the base paper locking portion 102 rotates about 90 degrees from the plate discharge position, the master sensor 32 again confirms the presence or absence of the base paper. Here, if “no base paper”, it is determined that the base paper has been sent to the transport device 2. If you have “base paper”,
The plate cylinder 101 is further rotated by 270 degrees (that is, up to the landing / ejection position) to notify of an ejection error. At the same time, the transport device 2
Also stops driving.

The stripped base paper S is transported by the transport device. As shown in FIG. 4, the base paper S is substantially sandwiched by a plurality of pulleys from above and below, and the belt acts as a guide for conveyance.

As shown in FIG. 2, a jam detecting sensor 45 is attached to the plate discharge pressure plate 3 above the plate member 26. The jam detection sensor 45 is operated by an actuator provided in the conveyance path of the base paper S. The jam detection sensor 45 of the present embodiment is provided above the central portion of the plate member 26 in the longitudinal direction, but the installation position is not limited to this. The actuator may be provided at any position as long as it is provided in the transport path of the base paper S. The jam detection sensor 45 is turned on by the leading edge of the conveyed raw paper S, and is kept on while the raw paper S is passing. One plate is all waste container 4
When it is fed into 0, the jam detection sensor 45 is turned off.
Becomes

During the time when the plate cylinder 101 has rotated 90 degrees from the previous plate loading / unloading position, the master sensor 32 is "no base paper".
The jam detection sensor 45 is turned off (the base paper S is discharged from the plate discharge container 40) at the time of the next landing / discharging position when the plate cylinder 101 is rotated 270 degrees from that (the state where the base paper S is sent to the transport device) is detected. When stored in),
The compression operation of the base paper S starts.

The compression plate 50 is located at the home position until the base paper S enters the plate discharge container 40. As shown in FIG. 2, the protrusion 35 does not block (ON) the full tank sensor 38, and the detection plate 37 is in a position that does not block (ON) the compression sensor 39.

The compression plate 50 rotates about the shaft 34 in the clockwise direction in FIG. The compression plate 50 moves along the inner surface of the plate discharge container 40, and reliably compresses the base paper S stored inside and sends it to the rear of the plate discharge container 40. FIG. 8 shows a state where the compression plate 50 is compressing the base paper S in the plate discharge container 40. When the compression plate 50 is compressing the base paper S in the plate discharge container 40,
As shown in FIG. 8, the detection plate 37 shuts off (ON) the compression sensor 39.

The compression plate 50 further rotates from the position shown in FIG. 8 to further compress the base paper S. The scraping ribs 51 of the compression plate 50 scrape up the compressed base paper S toward the upper shaft 34 in the plate discharge container 40. When the compression plate 50 reaches the predetermined position shown in FIG. 9, the detection plate 37 deviates from the position of the compression sensor 39, and the compression sensor 39 is turned off. Figure 9
The compression plate 50 shows a limit state in which the base paper S can be compressed in the plate discharge container 40. When the compression sensor 39 is turned off, the rotation of the compression plate 50 is stopped.

A motor (not shown) connected to the shaft 34 rotates in the reverse direction to rotate the compression plate 50 in the direction opposite to the compression direction. The detection plate 37 turns on the compression sensor 39 again and then further rotates to turn off the compression sensor 39 again. Here, the compression plate 50 returns to the home position shown in FIG. After the compression sensor 39 is turned off, the rotation of the compression plate 50 is stopped after waiting a predetermined time. Compression sensor 39
The reason why the compression plate 50 is not stopped immediately after the switch is turned off is that the compression sensor 39 is turned off by vibration of the stencil printing machine or the like.
This is because if it becomes N, it takes time to confirm the position of the compression plate 50 at the time of initial setting.

When the amount of the base paper S stored in the plate discharge container 40 increases and becomes full, even if the compression plate 50 pushes the base paper S, it does not move any more. In this case, as shown in FIG. 10, even if the shaft 34 driven by the motor rotates and the detection plate 37 fixed to the shaft 34 rotates together with the shaft 34 and passes the compression sensor 39, the compression is performed. The board 50 cannot be moved because its path is obstructed by the full base paper S. Therefore, the projection 35 integrated with the compression plate 50 cannot be rotated, and the projection 35 cannot turn on the full tank sensor 38.
In this way, the full tank sensor 38 becomes O during the compression operation.
If the compression sensor 39 is turned off before the value becomes N, it is determined that "the plate discharge container is full".

When the "full plate discharge container is full" is detected, an indication of "over plate discharge" is displayed by an LED or the like on the operation panel (not shown). As shown in FIG. 11A, the plate discharge plate 3
Is closed and the plate discharge container 40 is mounted on the stencil printing machine, the mounting plate 47 is pushed by the guide 42 and the plate discharge pressure plate switch 46 is set to a predetermined position. At this position, the plate discharge pressure plate switch 46 is turned on by the projection 49 of the plate discharge pressure plate 3. FIG. 11 (b)
As shown in FIG. 4, when the plate discharge container 40 is removed from the stencil printing machine, the mounting plate 47 rotates clockwise around the shaft 48, so that the plate discharge pressure plate switch 46 separates from the protrusion 49 and is turned off. Next, discard the base paper S in the plate discharge container 40,
The empty plate discharge container 40 is attached to the stencil printing machine. As described above, the plate discharge pressure plate switch 46 is
Is closed, and the plate discharge container 40 is not attached to the stencil printing machine, it is not turned on. Plate discharge plate switch 4
When a predetermined time or more elapses from the time when 6 is cut to the time when it is re-entered, it is considered that the base paper S has been discarded from the plate discharge container 40, and the above "plate discharge over" display is stopped. In addition,
At that time, if it is detected that the plate discharge pressure plate switch 46 is turned on and the compression plate 50 is lowered again to check after the plate discharge process,
In the unlikely event that the plate has not been discarded, the plate ejection device will not jam even if the next plate is ejected when the plate is completely discharged.

Next, a procedure for detecting the position of the compression plate 50 when the power of the stencil printing machine is turned on will be described. When the power is turned on, the position where the compression plate 50 exists is the home position (FIG. 2), the maximum compression position (FIG. 9),
It is considered to be one of the three positions of the intermediate position (Fig. 8).

In the case shown in FIG. 2, the compression sensor 39 is OFF when the power is turned on. First, the compression plate 50 is rotated clockwise in FIG. 2 by a motor (not shown) to stop after the compression sensor 39 is turned on, and the motor is rotated in the reverse direction to turn off the compression sensor 39 for a predetermined time ( 5
Stop the motor after 0 ms) has elapsed.

Also in the case shown in FIG. 9, the compression sensor 39 is OFF. The clockwise rear end of the detection plate 37 is removed below the compression sensor 39. First, the compression plate 50 is rotated clockwise in FIG. 9 by a motor (not shown). When the compression sensor 39 is not turned on after the lapse of a predetermined time (360 ms), the motor is stopped and the motor is further rotated in the reverse direction.
After confirming that the compression sensor 39 is turned on, the compression sensor 39 is driven in the same direction until it is turned off. After the compression sensor 39 is turned off, it is stopped after a predetermined time as in the case of.

In the case shown in FIG. 8, the compression sensor 39 is ON. The compression plate 50 is rotated clockwise until the compression sensor 39 is turned off, and the drive of the compression plate 50 is stopped when the compression sensor 39 is turned off. After that, after reversely rotating and the compression sensor 39 is turned off again, it is stopped after a predetermined time as in the case of.

In the above embodiment, the supporting portions 27b, 28 for supporting the lower second pulley 30 on the downstream side in the transport direction of the base paper S.
Although b is a pressing member that presses the return of the base paper S, a pressing member that is separate from the supporting portions 27b and 28b may be provided. In this case, the pressing member needs to be provided at a position where it does not interfere with the scraping rib 51 of the compression plate 50. In addition, the upper surface of the pressing member is arranged to be lower than the upper surfaces of the supporting portions 27b and 28b so that the pressing member does not give resistance to the raw paper S being conveyed. Further, the lower surface of the pressing member is located below the belt so that the rotation of the belt does not cause winding of the base paper.

In the above embodiment, a part of the conveying device 2 including the supporting portions 27b and 28b for supporting the lower second pulley 30 is
It was used as a pressing member for pressing the return of the base paper S. As shown in FIG. 7, a claw-shaped projection 55 may be provided as a pressing means on the inner surface side of the peripheral wall 40a of the plate discharge container 40 that is close to the front end of the opening 40b of the plate discharge container 40. This protrusion 55
Must be provided at a position that does not interfere with the scraping rib 51 of the compression plate 50. This projection 55 also allows the compression plate 5
The effect of stopping the base paper S in the plate discharge container 40 when 0 is returned from the plate discharge container 40 is obtained.

[0069]

According to the present invention, the stencil sheet S to which ink or the like adheres can be reliably compressed and stored. In particular, since the width of the stencil sheet storage section becomes larger as it goes deeper in the compression direction, a large amount of compressed base paper S can be stored.

[Brief description of drawings]

FIG. 1 is an overall view of a stencil printing machine having a plate discharge apparatus according to an embodiment.

FIG. 2 is a cross-sectional view of a plate discharging device according to an embodiment.

FIG. 3 is a diagram of the plate discharging device according to the embodiment as viewed from above.

FIG. 4 is a diagram of the plate discharge device according to the embodiment as viewed from the plate cylinder side.

5 is an enlarged view of the vicinity of the shaft of the compression plate in the plate discharging apparatus according to the embodiment, as viewed from the upper side of FIG.

FIG. 6 is a view of the plate discharge container of the plate discharge device according to the embodiment as viewed from above.

FIG. 7 is a view of the plate discharge box of the plate discharge device according to the embodiment as viewed from a direction perpendicular to the attachment / detachment direction.

FIG. 8 is an operation explanatory diagram of the plate discharging apparatus according to the embodiment.

FIG. 9 is an operation explanatory diagram of the plate discharge device according to the embodiment.

FIG. 10 is an operation explanatory diagram of the plate discharging apparatus according to the embodiment.

FIG. 11 is a partially enlarged view for explaining the attaching / detaching operation of the plate discharge container in the plate discharge apparatus according to the embodiment.

FIG. 12 is a view showing a conventional plate discharge device.

FIG. 13 is a view showing a conventional plate discharge device.

[Explanation of symbols]

1 Plate ejection device 10, 20 Transport means 2 Conveyor 27a, 28b Supports as pressing means 34 Compressor plate axis 40 Plate discharge container as plate discharge storage 40a Peripheral wall of plate discharge container 40b Opening of stencil container 50 Compression plate as compression means 51 Projection of compression plate 55 Protrusion as pressing means

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41L 13/14

Claims (3)

(57) [Claims] 1. Conveying means for conveying the base paper to be discarded,
And a compression unit for moving the inside of the storage space of the plate discharge storage unit to compress the base paper in the storage space. The width of the plate discharge accommodating section in the direction parallel to the paper surface of the base paper and orthogonal to the transport direction of the base paper is widened along the direction in which the compression means moves to compress the base paper. apparatus. 2. Conveying means for conveying the base paper to be discarded,
Move the stencil discharge housing section provided with a housing space for housing the base paper that has been conveyed by the conveying means, the discharge plate housing portion housing space and a compression means for compressing the stencil in said housing space, the The compression means is rotatable about the axis and about the axis by a predetermined angle.
And a certain compression plate,
The plate discharge device having a peripheral wall that matches the trajectory of the tip of the compression plate . 3. Conveying means for conveying the base paper to be discarded,
A storage space for storing the base paper conveyed by the conveying means.
Inside the storage space of the stencil storage section with a space
Moving means for compressing the raw paper in the storage space.
The compression means has an axis and a compression plate rotatable about the axis by a predetermined angle, and the stencil sheet storage section has a bottom surface or a front surface which is a part of a peripheral surface of a cylinder.
Peripheral wall that matches the trajectory of the tip of the rotating compression plate
The back of the rectangular shape and both sides of the fan shape are closed.
The upper side of the rectangular shape is opened and the
Are to become the opening, the compressing means through which storage space the rotation of the plate discharge housing part
A plate discharge device characterized in that the space passing through is substantially the same .