JPH10273242A - Press plate feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press plate feeder by which a press plate can be fed to an exposure device without double feeding. SOLUTION: When a press plate is held by a suction pad 102, the following plate may adhere to the held plate. As the suction pad 102 is intermittently moved while moved circularly, the following plate adhering to the held press plate is peeled off by its own inertia at high probability. That is, the adhering following plate receives centrifugal force in addition to vibration based on intermittent movement and can be easily peeled off in comparison with the case in which it receives only vibration based on one-way reciprocating motion such as vertical motion. In an intermittent movement, a mean moving speed can be easily increased as against in a shift with reciprocating motion, so that larger centrifugal force can be applied to the adhering press plate when circular motion is combined. As a result, the adhering plate can be separated with higher probability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate supply device, and more particularly, to a plate supply device having a mechanism for preventing two plates from being taken out.

[0002]

2. Description of the Related Art In recent years, an image recording apparatus for recording an image on a printing plate (hereinafter referred to as a printing plate) by irradiating a laser beam has been widely used. The printing plate used in this type of image recording apparatus is usually a thin plate of aluminum material coated with a photosensitive agent on one side (hereinafter, an aluminum-based printing plate), or one of a thin plate of polyester material. The surface is coated with a photosensitive agent (hereinafter, a polyester-based printing plate), and the surface (hereinafter, a photosensitive surface) is exposed to light by scanning with a laser beam, and an image is recorded thereon. The processing capacity of image recording apparatuses has been improving year by year, and accordingly, higher reliability has been required of a plate supply apparatus for supplying a plate to the image recording apparatus.

[0003] A predetermined number of printing plates before exposure are bundled and stored in a dedicated container, and a printing plate supply device takes out the printing plates one by one from the container and supplies them to an image recording device. Is repeated. One of the problems that arises at that time is
There are two printing plates (ie, supplying two or more printing plates at a time). In a plate supply device of a type in which a plurality of printing plates stored in a container are sequentially sucked and taken out from the top plate, the next printing plate is placed on the back surface of the sucked printing plate by, for example, the action of static electricity. Are often attached, and double-sheeting often occurs.

In view of the above, various methods and mechanisms have been devised so as to prevent the above-described double-sheet picking. One of them is a photosensitive material disclosed in JP-A-8-198468. There is a separation and removal method. FIG. 6 is a diagram for explaining the double-sheet removal prevention method disclosed in the above publication. In FIG. 6, a plurality of printing plates are stored in a container in a state of being stacked. The suction cup moves upward when sucked by the uppermost printing plate stored in the container. Then, it moves up and down a plurality of times during the ascent.

[0005]

According to the above-mentioned publication, when the next printing plate adheres to the back surface of the printing plate sucked by the suction cup, as described above, the plate is moved up and down while ascending. It is stated that plate separation is promoted. By the way, Japanese Patent Application Laid-Open No. 6-40577 also discloses that the suction cup performs an up-down operation, but also describes that air is blown toward the adsorbed printing plate simultaneously with the up-down operation. Have been. As can be seen from this, the method of vertical movement disclosed in Japanese Patent Application Laid-Open No. 8-198468 does not always provide a sufficient separation effect. on the other hand,
In the method disclosed in Japanese Patent Application Laid-Open No. 6-40577, even if a sufficient separating effect is obtained, a special mechanism for preventing two sheets from being separated from the mechanism for removing the printing plate is required. Therefore, there is a problem that the configuration of the plate supply device becomes complicated.

Accordingly, an object of the present invention is to provide a simple configuration,
An object of the present invention is to provide a printing plate supply device that can supply a printing plate to an exposure apparatus without taking two plates.

[0007]

Means for Solving the Problems and Effects of the Invention A first invention is a plate supply device for supplying a plate to an exposure device, wherein a plurality of plates are stored in a stacked state. A container, and a plurality of printing plates contained in the container, sequentially from the top one, comprising a take-out means for grasping each upper surface and taking out, the take-out means intermittently moves and stops. It is characterized in that the printing plate is taken out repeatedly so that its movement locus draws an arc.

As described above, in the first invention, the container
A plurality of printing plates are stored in a stacked state. The plurality of printing plates stored in the container are sequentially taken out from the top one while holding the upper surface of each printing plate. The printing plate being removed moves intermittently (ie, alternately moving and stopping) and so that its trajectory describes an arc.

The next printing plate may adhere to the back surface of the held printing plate due to, for example, the action of static electricity.
As described above, the gripped printing plate moves intermittently while drawing an arc, so that the next printing plate attached to the back surface of the gripped printing plate has a high probability due to its own inertia. Peel off. That is, the next printing plate that has adhered receives a centrifugal force in addition to the vibration caused by the intermittent movement, and thus is more likely to be peeled off compared to a case where only the vibration caused by a one-way reciprocating movement such as a vertical movement. Also, in intermittent movement, it is easier to increase the average movement speed compared to movement with reciprocating movement, so when combined with arc movement, greater centrifugal force can be applied to the attached printing plate. it can. Therefore, the attached printing plate can be separated with a higher probability. Further, by performing the intermittent movement, the time required for the movement can be reduced as compared with the case of moving while reciprocating. For this reason, the supply speed of the plate supply device is further increased.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a main part of a plate supply device according to one embodiment of the present invention. FIG. 2 is a perspective view showing an image recording system using the apparatus shown in FIG. The system shown in FIG. 2 includes a plate supply device 10 (the device shown in FIG. 1), an exposure device 20, and a developing device 30. Hereinafter, the operation of the system of FIG. 2 will be described. The plate supply device 10 is provided with a plate case 101 for accommodating a plate. The plate supply device 10 sequentially removes the plates from the plate case 101 and exposes the exposure device 20. To supply.

The printing plate accommodated in the printing plate case 101 is an aluminum-based printing plate or a polyester-based printing plate similar to that described in the section of the prior art.
The exposure apparatus 20 includes an exposure table 20 that can be moved back and forth.
The supplied printing plate is fixed on the exposure table 201 and moved at a predetermined speed toward the developing device 30 side. At that time, the printing plate receives a plane scan by a laser beam and is exposed. The exposed printing plate is discharged to the developing device 30 side. The developing device 30 takes in and develops the discharged printing plate.

As shown in FIG. 1, the plate supply device 10 includes:
Plate case 101, suction pad 102, metal sensor 10
3. Route switching guide 104, guides 105 to 10
8, conveyor belt 109, nip roller 110, plate discharge roller 111, slip sheet discharge roller 112, motor 113, chains 114 and 115, belt 116,
Rollers 117 to 120 and a collection box 121 are provided. The plate case 101 is detachable, and a shutter 101a is provided on an upper surface thereof. The shutter 101a opens and closes when driven by a motor (not shown).

A take-out section is constituted by the suction pad 102, the belt 116 and a motor (not shown) (note that the take-out section is not provided with a reference number). When the suction pad 102 is driven by a motor (not shown) via a belt 116, the take-out unit is moved to the printing plate case 1.
The printing plates and the interleaf stored in 01 are sequentially taken out from the top one.

A conveyor belt 109, guides 105 and 106, a plate discharging roller 111, and a roller 117
To 119 constitute a plate transport path (note that reference numerals are not given to the plate transport path). The guides 107 and 108, the slip sheet discharge roller 112, and the roller 120 form a slip sheet transport path (note that the slip sheet transport path is not given a reference number).

The metal sensor 103 inspects the taken out thin plate to detect a metal material. Route switching guide 1
04 and a solenoid (not shown) constitute a path switching unit (note that the path switching unit is not provided with a reference number). In the path switching unit, the path switching guide 104 is driven by a solenoid (not shown) in accordance with the detection result of the metal sensor 103, and a position indicated by a solid line (a printing plate position) and a position indicated by a dotted line (an interleaving position). Move to each other. Thereby, when the taken-out thin plate is a printing plate (aluminum-based printing plate), the printing plate transport path is opened and the slip sheet transport path is closed. On the other hand, in the case of interleaving paper, the interleaving paper transport path is opened and the printing plate transport path is closed.

The nip roller 110 is driven by a motor (not shown) to move between a position shown by a solid line and a position shown by a dotted line. Conveyor belt 109
Is driven in the direction shown by the arrow in the figure by being driven by the motor 113 via the chain 114. Plate discharging roller 111 and slip sheet discharging roller 1
Reference numeral 12 denotes chains 114 and 11 driven by a motor 113.
5 are rotated in the directions indicated by arrows.

The operation of the plate supply device 10 shown in FIG. 1 will be described below. First, a case where an aluminum-based printing plate is supplied will be described. Now, in the printing plate case 101, for example, about 50 aluminum-based printing plates are stored in advance so that the photosensitive surface faces upward. A slip sheet for protecting the photosensitive surface of the printing plate is interposed between the printing plates. Further, the shutter 101a provided in the plate case 101 is initially in a closed state (that is, a state in which the end of the shutter 101a is pulled down to a position shown by a dotted line in the drawing). First, the operator mounts the plate case 101 on the plate supply device 10.

An input switch for setting whether to supply an aluminum-based printing plate or a polyester-based printing plate is provided on an operation panel (not shown).
The operator then sets the switch to supply an aluminum-based plate. Then, when a power supply (not shown) is turned on, the shutter 101a is driven by a motor (not shown), and is opened (that is, the shutter 1a).
01a is pulled up to the position shown by the solid line in the figure).

Next, the suction pad 102 is driven by a motor (not shown) via a belt 116, and moves from a position shown by a solid line to a position shown by a dotted line in the figure. And
When the suction is started and the printing plate is gripped by the suction pad 102, the suction pad 102 is driven again by the motor (not shown) via the belt 116, and moves to the position indicated by the solid line. At this time, the suction pad 102 moves intermittently and in an arc (for details,
See below).

At a predetermined timing until the suction pad 102 moves from the position indicated by the dotted line to the position indicated by the solid line, the shutter 101a is driven again by a motor (not shown) and closed (the details will be described later). ).

When the suction pad 102 moves to the position indicated by the solid line, the metal sensor 103 inspects the printing plate taken out by the suction pad 102. As a result of the inspection, the metal material is detected, so that the path switching guide 104 is driven by a solenoid (not shown) and moves to a position (printing plate position) indicated by a solid line. At the same time, the nip roller 110
Is driven by a motor (not shown),
Move to the position shown by the dotted line.

The transport belt 109 is driven by a motor 113 via a chain 114 and travels in a direction indicated by an arrow in the figure. The printing plate taken out by the suction pad 102 is sandwiched between the transport belt 109 and the nip roller 110. Next, the suction pad 102 stops sucking and retracts to a position where it does not touch the printing plate. In this way, when the taken out printing plate is held only by the transport belt 109 and the nip roller 110, the transport belt 109 starts to move in the direction indicated by the arrow in the drawing, and the printing plate is vertically moved. It is sent upward. When the printing plate has been sent out, the nip roller 110 is driven by a motor (not shown) to move to the position shown by the solid line.

Since the path switching guide 104 is at the position indicated by the solid line (plate position), the transmitted plate is
As the transport belt 109 advances, and while being supported by the guides 105 and 106, the plate discharging rollers 11
It is transported toward 1. The plate discharging roller 111 is rotated in a direction indicated by an arrow in the drawing by being driven by a motor 113 via chains 114 and 115. The transported printing plate is a printing plate discharge roller 111.
And the roller 119, and is discharged to an unillustrated exposure device provided in front of the roller. Thus, the supply of the first printing plate is completed.

Next, the shutter 101a is driven by a motor (not shown) and is opened again. Next, the suction pad 102 is driven by a motor (not shown) via the belt 116, and moves from the position indicated by the solid line to the position indicated by the dotted line. Then, the suction is started, and the slip sheet is put on the suction pad 102.
Then, the suction pad 102 is driven again by the motor (not shown) via the belt 116 and moves to the position indicated by the solid line. At that time, the suction pad 102
It moves intermittently so as to draw an arc (the details will be described later).

At a predetermined timing until the suction pad 102 moves from the position indicated by the dotted line to the position indicated by the solid line, the shutter 101a is driven again by a motor (not shown) and closed (the details will be described later). ).

When the suction pad 102 moves to the position indicated by the solid line, the metal sensor 103 inspects the removed slip sheet. As a result of the inspection, since the metal material is not detected, the path switching guide 104 is driven by a solenoid (not shown) and moves to a position indicated by a dotted line (an interleaf position). At the same time, the nip roller 110 is driven by a motor (not shown) to move to a position indicated by a dotted line.

The transport belt 109 is driven by a motor 113 via a chain 114 and travels in a direction indicated by an arrow in the figure. The slip sheet taken out by the suction pad 102 is sandwiched between the transport belt 109 and the nip roller 110. Next, the suction pad 102 stops sucking and retracts to a position where it does not touch the slip sheet. In this way, when the removed slip sheet is held by only the transport belt 109 and the nip roller 110, the transport belt 109 starts to advance in the direction indicated by the arrow in the drawing, and the slip sheet is vertically moved. It is sent upward. When the interleaf feeding is completed, the nip roller 110 is driven by a motor (not shown) to move to a position indicated by a solid line.

Since the path switching guide 104 is at the position indicated by the dotted line (position for interleaving paper), the traveling direction of the sent interleaving paper is bent, and thereafter, while being supported by the guide 107, the interleaf discharging rollers 112 Transported to the side. The interleaf discharge roller 112 is driven by a motor 113 to rotate the chain 1.
By being driven through 14 and 115, it rotates in the direction shown by the arrow. The conveyed interleaf is caught between the interleaf discharge rollers 112 and the rollers 120, and is discharged to the collection box 121 through the guide 108. The discharged slip sheet falls from the open upper surface of the collection box 121 toward the inner bottom portion by its own weight. Above, 1
The collection of the interleaf sheet is completed.

Next, the second printing plate is supplied in the same manner as described above, and the second slip sheet is collected in the same manner as described above. Thereafter, by repeating the same operation, the plate supply device 10 of FIG. 1 sequentially removes and collects the interleaving paper sandwiched between the plates and sequentially exposes the plates to the exposure device. Can be supplied to

FIG. 3 is a view showing what kind of trajectory the suction pad 102 of FIG. 2 moves after gripping the printing plate or the slip sheet. Below, the suction pad 102
How it moves after gripping the printing plate or slip sheet will be described with reference to FIG. Suction pad 102
Are set in advance so as to move along a trajectory as shown in FIG. On the other hand, a motor (not shown) for driving the suction pad 102 is set in advance to operate intermittently at a predetermined cycle. If a pulse motor is used as the motor, an intermittent operation can be easily realized. When the suction pad 102 grips the printing plate or the slip sheet, the suction pad 102 is driven via the belt 116 by the motor,
As a result, it moves intermittently (that is, alternately repeating movement and stopping) while drawing an arc.

When the suction pad 102 grips the printing plate, interleaving paper may adhere to the back surface of the printing plate due to, for example, the action of static electricity. Similarly, the suction pad 102
When the user grips the slip sheet, the printing plate may adhere to the back surface of the slip sheet. As described above, the suction pad 102 intermittently moves while drawing an arc, so that the slip sheet attached to the back surface of the gripped printing plate, or the printing plate stuck to the back surface of the gripped slip sheet, Due to its own inertia, it will come off with a high probability.

What is important here is that the suction pad 102 moves intermittently and its trajectory is circular. Now, assuming that the interleaf is attached to the back surface of the held printing plate, the adsorbed interleaf receives centrifugal force in addition to the vibration caused by the intermittent movement by the suction pad 102 moving in such a manner. . Therefore, the attached interleaving paper will come off with a higher probability than in the case of receiving only vibration.

By the way, originally, the slip sheet is electrostatically attached to the photosensitive surface of the printing plate. The suction pad 102 grasps the base surface side of the printing plate. When the suction pad 102 grips and lifts a printing plate, not only the slip sheet is adhered to the printing plate, but also the next printing plate may be stuck to the back of the slip sheet.

In this case, when the suction pad 102 performs the above-described intermittent movement, only the printing plate attached to the back of the slip sheet falls, and the slip sheet does not drop but the printing plate held by the suction pad 102. It is also conceivable that it remains attached to But,
Since the photosensitive surface of the printing plate has stronger adhesion to the slip sheet than the base surface, the slip sheet falls with the next printing plate.

The suction pad 102 may move while reciprocating at a predetermined amplitude, instead of intermittently moving as described above. However, in this case, since the movement takes time, the supply speed of the plate supply device 10 becomes relatively slow. Also, in the case of reciprocating movement, it is not easy to increase the average moving speed as compared with the intermittent movement, so that when combined with the circular movement, a large centrifugal force cannot be applied to the attached slip sheet. . Therefore, the probability that the attached slip sheet can be separated becomes relatively small.

FIG. 4 is a view for explaining an operation of closing the shutter 101a immediately after the printing plate or the slip sheet is taken out in the apparatus of FIG. The operation of closing the shutter 101a provided in the plate case 101 immediately after the plate or the slip sheet is taken out will be described below with reference to FIG.
This will be described with reference to FIG. First, the shutter 101a is opened, and the suction pad 102 suctions the top one of the printing plate and the slip sheet stored in the printing plate case 101 (FIG. 4A).

When the suction pad 102 starts moving while holding the printing plate or interleaf, the shutter 101a is driven by a motor (not shown) and closed. The timing at which the shutter 101a is closed is selected such that the end of the shutter 101a being lowered does not come into contact with the upper end portion of the printing plate or slip sheet that is being moved, but passes immediately below it (FIG. 4). (B)).

At such a timing, the shutter 101a
Is closed, the shutter 101a is interrupted between the printing plate or slip sheet currently being removed and the next slip sheet or printing plate to be removed, and as a result, the printing plate or slip sheet being removed is closed. The bottom edge of the paper
It is lifted by the end of the shutter 101a that is being lowered (FIG. 4C).

When the removal of the suction pad 102 is released and the suction of the suction pad 102 is released, the taken out printing plate or slip sheet is conveyed in a direction indicated by an arrow in the drawing. At this time, the lower end portion of the printing plate or slip sheet being conveyed is dragged on the closed shutter 101a (FIG. 4D). That is, by closing the shutter 101a as described above, the lower end portion of the printing plate or the interleaving paper being conveyed is not dragged on the surface of the interleaving paper or the printing plate to be taken out next.

When the printing plate and the slip sheet are alternately stored in the printing plate case 101, the lower end portion of the printing plate or the slip sheet being conveyed is placed on the surface of the slip sheet or the printing plate to be taken out next. Even if dragged above, the photosensitive surface of the printing plate will not be damaged. However, in the case where the slip sheet is missing and the printing plates are successively stored, the lower end of the printing plate being conveyed moves the photosensitive surface of the printing plate to be taken out next. It can hurt you. In the apparatus shown in FIG. 1, the shutter 101a is closed at the above-mentioned timing each time a printing plate or slip sheet is taken out from the printing plate case 101, so that the photosensitive surface of the printing plate to be taken out next is damaged. Sticking can be prevented.

Next, a case where a polyester-based printing plate is supplied will be described. Now, in the printing plate case 101, for example, about 50 polyester-based printing plates are provided.
It is stored in advance so that the photosensitive surface faces upward. Unlike an aluminum-based printing plate, no interleaving paper is inserted between the printing plates.

An input switch for setting whether to supply an aluminum-based plate or a polyester-based plate is provided on an operation panel (not shown).
The operator sets the switch to supply a polyester-based printing plate. Then, when a power supply (not shown) is turned on, the shutter 101a is driven by a motor (not shown) to be in an open state.

Next, the suction pad 102 is driven by a motor (not shown) via the belt 116, and moves from a position shown by a solid line to a position shown by a dotted line in the figure. And
When the suction is started and the printing plate is gripped by the suction pad 102, the suction pad 102 is driven again by the motor (not shown) via the belt 116, and moves to the position indicated by the solid line. At that time, the suction pad 102 moves in an arc and intermittently (the details are the same as those described above).

At a predetermined timing until the suction pad 102 moves from the position indicated by the dotted line to the position indicated by the solid line, the shutter 101a is driven again by a motor (not shown) and closed (the details are described above). And the same.)

In the case of a polyester-based printing plate, since no slip sheet is inserted between the printing plates, the metal sensor 103 performs an operation of inspecting the printing plate transported by the suction pad 102. Absent. The path switching guide 104 is driven by a solenoid (not shown) and moves to a position (plate position) indicated by a solid line.
It is fixed in that position.

The transport belt 109 is driven by a motor 113 via a chain 114 and travels in a direction indicated by an arrow in the figure. The printing plate taken out by the suction pad 102 is sandwiched between the transport belt 109 and the nip roller 110. Next, the suction pad 102 stops sucking and retracts to a position where it does not touch the printing plate. In this way, when the taken out printing plate is held only by the transport belt 109 and the nip roller 110, the transport belt 109 starts to move in the direction indicated by the arrow in the drawing, and the printing plate is vertically moved. It is sent upward. When the printing plate has been sent out, the nip roller 110 is driven by a motor (not shown) to move to the position shown by the solid line.

Since the path switching guide 104 is at the position indicated by the solid line (printing plate position), the transmitted printing plate is
As the transport belt 109 advances, and while being supported by the guides 105 and 106, the plate discharging rollers 11
It is transported toward 1. The plate discharging roller 111 is rotated in a direction indicated by an arrow in the drawing by being driven by a motor 113 via chains 114 and 115. The transported printing plate is a printing plate discharge roller 111.
And the roller 119, and is discharged to the exposure device (not shown).

Thus, the supply of the first printing plate is completed.
Thereafter, by repeating the same operation, the plate supply device 10 of FIG. 1 can sequentially supply the polyester-based plate to the exposure device.

Further, the shutter 101a is closed at the above timing each time the printing plate is taken out of the printing plate case 101, thereby preventing the photosensitive surface of the printing plate to be taken out next from being damaged. be able to. Unlike the aluminum-based printing plate, the lower end of the printing plate being taken out and conveyed is not inserted between the printing plates, unlike the aluminum-based printing plate. However, there is a relatively high possibility that the photosensitive surface of the printing plate to be taken out next will be damaged. Therefore, when a polyester-based printing plate is supplied, the effect of preventing the photosensitive surface of the printing plate to be removed next from being damaged is more remarkable than when an aluminum-based printing plate is supplied.

In the apparatus shown in FIG. 1, the operator sets whether to supply an aluminum-based plate or a polyester-based plate by switching a switch (not shown). Therefore, if the operator makes a setting error, the slip sheet is not removed correctly, or the polyester-based printing plate is mistaken for the slip sheet, and the collection box 121
Inconvenience such as being transported to the side occurs. Therefore, hereinafter, another plate supply device capable of preventing the above setting error will be described with reference to the drawings.

FIG. 5 is a sectional view showing a main part of a plate supply device according to another embodiment of the present invention. 5 is provided in place of the plate supply device 10 in the image recording system of FIG. The apparatus shown in FIG. 5 has the same configuration as the apparatus shown in FIG. 1 except that a metal sensor 101b is further provided on the plate case 101. The metal sensor 101b inspects the inside of the plate case 101 and detects a metal material.

The operation of the plate supply device 50 shown in FIG. 5 will be described below. However, detailed description of the same operation as that of the apparatus in FIG. 1 is omitted. The operator mounts the printing plate case 101 containing, for example, about 50 aluminum-based printing plates or polyester-based printing plates in the apparatus shown in FIG. At this time, the metal sensor 101b provided in the plate case 101 operates to inspect the inside of the plate case 101.

As a result of the inspection, when the metal sensor 101b detects a metal material, it is automatically set to supply an aluminum-based printing plate, and the interleaving paper sandwiched between the printing plates is automatically set. An operation of sequentially supplying the printing plate to the exposure device while removing and collecting the plate is started. The operation is the same as the operation of the device of FIG. 1 described above. On the other hand, the metal sensor 101
If b does not detect the metal material, the setting is automatically made to supply the polyester-based printing plate, and the operation of sequentially supplying the printing plate to the exposure apparatus is started. The operation is the same as the operation of the device of FIG. 1 described above.

As described above, in the apparatus shown in FIG. 5, when the plate case 101 is mounted, the inside of the plate case 101 is inspected to detect a metal material. Then, based on the detection result, whether to supply the aluminum-based printing plate or the polyester-based printing plate is automatically set. This allows the operator, as in the device of FIG.
At the start of supply, there is no need to manually set whether to supply an aluminum-based plate or a polyester-based plate. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a main part of a plate supply device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an image recording system in which the plate supply device 10 of FIG. 1 is used.

FIG. 3 is a view showing what kind of trajectory the suction pad 102 of FIG. 1 moves after gripping a printing plate or slip sheet.

FIG. 4 is a view for explaining an operation of closing the shutter 101a immediately after a printing plate or a slip sheet is taken out in the apparatus of FIG. 1;

FIG. 5 is a cross-sectional view illustrating a main part of a plate supply device according to another embodiment of the present invention.

FIG. 6 is a diagram for explaining a conventional method for preventing two sheets from being taken out.

[Explanation of symbols]

 10, 50 plate supply device 20 exposure device 30 developing device 101 plate case 102 suction pad 103, 101b metal sensor 104 path switching guide 105-108 guide 109 transport belt 110 nip roller 111 plate discharge roller 112 interleaf paper Discharge roller 113 Motor 114, 115 Chain 116 Belt 117-120 Roller 121 Collection box 101a Shutter 201 Exposure table

Claims (1)

[Claims] 1. A printing plate supply device for supplying a printing plate to an exposure device, comprising: a plurality of printing plates stacked in a stacked state; a container stored therein; and a plurality of printing plates stored in the container. , Sequentially from the highest one, comprising a take-out means for grasping and taking out each upper surface, wherein the take-out means intermittently repeats the movement and the stop, and the movement locus thereof draws an arc. A printing plate supply device, wherein the printing plate is taken out.