JPH0543616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for discharging interleaf paper interposed between photosensitive plate materials for, for example, offset printing or letterpress printing.

An automatic exposure machine that creates printing plates for offset printing or letterpress printing holds a large number of plates stacked on top of each other in a part of the machine, transports the plates one by one to the exposure section, and then exposes the plates to the exposure section. For example, if the photosensitive layer formed on the surface of the plate material is a negative type, a negative film original is placed on the photosensitive layer and exposed, and the light is applied only to the part of the photosensitive layer that corresponds to the image area of the original. By later eluating the areas that were not hit, a printing plate having a printed area and a non-printed area is obtained.

By the way, when holding a large number of plates one on top of the other, in order to prevent the photosensitive layer formed on the surface of the plates from being damaged or sticking to other plates, there is a space between each plate. is holding a piece of paper between the two. Therefore, before conveying the plate material to the exposure section, it is necessary to remove the interleaving paper on the plate material in advance.

As a device for this purpose, a paper ejecting device using a vacuum pad as shown in Japanese Patent Application No. 175,674/1988 can be considered. This device attaches a vacuum pad to the arm, rotates the arm to move the vacuum pad onto the interleaf of the plate material, adsorbs the interleaf, and then rotates the arm again to remove the vacuum pad with the interleaf absorbed. The paper is moved to a discharge position, and at this position, the suction is released and the interleaf paper is discharged into a predetermined receiving box.

However, in a paper ejecting device using such suction, there is a possibility that malfunction may occur depending on the quality of the interleaf paper. That is, if a coarse and heavy paper such as Japanese paper is used as interleaving paper, suction cannot be performed reliably and the paper may not be ejected.

The present invention was created in view of the above-mentioned problems in the paper discharging device of an automatic exposure machine, and its purpose is to provide a paper discharging device that can reliably discharge sheets without being affected by the quality of the interleaf paper. The purpose is to

In order to achieve this object, the present invention disposes a vertically movable support near a large number of stacked plates, supports a horizontally movable movable body by this support, and this movable body A roller that rotates in the paper ejection direction is attached to the plate, and by moving the support downward, the roller is brought into pressure contact with the interleaving paper on the plate material.In this state, the roller is rotated in the ejection direction and the movable body is moved in the ejection direction. The gist is that the interleaf paper is ejected by pressing the paper.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of an automatic exposure machine to which a slip sheet discharge device according to the present invention is applied, and FIG. 2 is a plan view of the same automatic exposure machine. It consists of a section 3 and an exposure section 4, and on the side of the plate material supply section 2 is a paper receiving box 5, and in front of the exposure section 4 (see Fig. 2) is a cassette 6 containing negative film as an original. are attached to each.

The plate supply unit 2 is surrounded by a frame 7, a plate supply lifter 8 is disposed in the space surrounded by the frame 7, and a cart 9 is moved in and out between the plate supply lifter 8 and the frame 7. It is said to be free. A large number of plate materials 10 are stacked and held on this cart 9 with interleaf sheets 11 interposed therebetween.On the other hand, a motor 12 is attached to the plate material supply lifter 8, and the rotational movement of this motor 12 is controlled. The gear box 13 converts the movement into vertical movement, and the plate body 14 is moved up and down. By driving the motor 12, the plates 10 stacked on the cart 9 are gradually raised. In addition, the plate material supply section 2 includes a slip paper discharge device 15.
has been set up. That is, a fixed frame 16 fixed to the main body of the automatic exposure machine 1 is provided above the plate material supply section 2, and this fixed frame 16 and the frame 7 of the plate material supply section 2 are connected.
As shown in FIG. 3, supports 17, 17 are erected between the corners of the
A support 19 is inserted from above through the support 18, and the rod 21 of the cylinder unit 20 fixed to the fixed frame 16 is tied to the center of the upper surface of the support 19.
By driving the cylinder unit 20, the support body 19 can be moved up and down along the pillars 17, 17. Further, a cylinder unit 22 is mounted horizontally on the outer surface (the left side in FIG. 1) of the support 19, and the rod 23 of the cylinder unit 22 passes through the support 19 and faces the inner side.
Guide rods 24, 24 are installed on the inner surface of the support body 19, projecting inwardly and horizontally and parallel to the rods 23. A central portion of a movable body 25 is tied to the tip of the rod 23, and receiving portions 2 provided on both sides of the movable body 25 are attached.
6, 26 through which the guide rods 24, 24 are inserted. Further, support pins 27, 27 are vertically passed through the outer side of the receiving parts 26, 26 of the moving body 25, and a spring 28 is interposed between the support pin 27 and the moving body 25. A roller 30 rotated by a motor 29 is attached to the lower end of the pin 27. The outer circumferential portion 31 of the roller 30 is made of a material having a high coefficient of friction, such as rubber or sponge having a rubber hardness of 10 to 40 degrees.

Next, based on FIGS. 4 to 6, the interleaving paper ejection device 1
The effect of No. 5 will be explained. Here, FIG. 4 is a front view of the slip sheet discharging device in a standby state, FIG. 5 is a front view of the slip sheet discharging device in the middle of discharging, and FIG. 6 is a front view of the slip sheet discharging device in a state in which discharging is completed.

First, in the standby state, the rod 21 of the cylinder unit 20 attached to the fixed frame 16 is retracted, the support body 19 is in the upper position, and the support body 1
The rod 23 of the cylinder unit 22 attached to the cylinder 9 protrudes, and the movable body 25 is in the inner position. In this state, since the support 19 is located above, the roller 30 is also located above, and the outer peripheral portion 31 of the roller 30 is separated from the interleaving paper 11 on the plate material 10.

From this state, the cylinder unit 20 is driven to move the support body 19 downward. Then, the movable body 25 also moves downward, and the roller 30 attached to the movable body 25
The outer circumferential portion 31 of is pressed against the interleaving paper 11 on the plate material 10 at the uppermost position. Simultaneously with this pressure contact, the motor 29 is driven to rotate the roller 30 in the discharge direction, that is, in the clockwise direction in the figure. Then, the interleaving paper 11 is the fifth
Move left and right in the figure as shown in the figure. Also, interleaf paper 1
1 has moved by a predetermined amount due to the rotation of the roller 30, in other words, after a certain period of time has elapsed since the start of driving the motor 29, the cylinder unit 22 is driven and the rod 23 is caused to retract.
Then, the moving body 25 and the roller 30 attached thereto move in the discharge direction. As a result, paper 11
is discharged by the rotation and movement of the roller 30.

Then, as shown in FIG. 6, the roller 30 moves the plate material 1
0, the roller 30 falls below the uppermost plate material 10 due to its own weight. In this case, since the spring 28 is interposed between the movable body 25 and the pin 27, the roller 30 will not hit the guide plate 32 with force. Further, the interleaving paper 11 falls into the interleaving paper receiving box 5 along the guide plate 32. Further, from the state shown in FIG. 6, if the cylinder unit 20 is driven to raise the support body 19, and then the cylinder unit 22 is driven to move the movable body 25 inward, the standby state shown in FIG. 4 is achieved. . In addition, numeral 33 in the figure is a detection device, which detects the top position of the stacked plates 10, and drives the motor 12 of the plate supply lifter 8 with a signal from this detection device.
The top position of the stacked plates 10 is always kept constant.

Incidentally, above the plate material supply section 2, a plate material transfer device 34 is provided. As shown in FIG. 2, this transfer device 34 connects a pair of guide rods 35, 35 extending in the left-right direction to brackets 36...
The movable member 3 is installed on this guide rod 35.
This movable member 37 is constructed by attaching a vacuum pad 39 that can be moved up and down by a cylinder unit 38. Then, by driving the cylinder unit 38, the vacuum pad 39 is moved downward.
The plate material 10 from which the interleaf paper 11 has been removed is sucked.
Thereafter, the motor 40 is driven to move the moving member 37 to the right in the figure along the guide rod 35, and the plate material 10 adsorbed by the vacuum pad 39 is transferred to the upper part of the plate material conveying section 3, and then by the vacuum pad 39. The suction is released and the plate material 10 is placed on the conveyor belt 3a.

Thereafter, the transfer device 34 returns to its original state, and the plate material 10 is transported to the exposure section 4. This exposure section 4 is provided with a mounting plate 41 for vacuum suctioning the plate material 10, and cylinder units 42, 4 are installed on the sides of this mounting plate 41.
2 are erected, and the chucking device 43 is supported by these cylinder units 42, 42 so as to be movable up and down. This chucking device 43 is capable of reciprocating in a direction perpendicular to the plane of FIG. 1 (back and forth) by a drive source (not shown). When the plate material 10 is carried in and positioned on the mounting plate 41, the plate material 10 is suctioned and fixed onto the mounting plate 41 by the suction device. In parallel with this suction fixing operation, the chucking device 4
3 is moved forward to grip the negative film original in the cassette 6, and the chucking device 43 is returned to the rear again to hold the negative film original above the mounting plate 41. When the plate material 10 is suctioned and fixed onto the mounting plate 41, the chucking device 43 is lowered by the operation of the cylinder unit 42, a negative film original is superimposed on the photosensitive layer of the plate material 10, and then the light source is turned on. The built-in case 44 is lowered and exposed for a predetermined time. After this, the tracking device 43
is raised to separate the negative film original from the plate material 10, and the negative film original is returned to the cassette 6 by advancing the chucking device, and the exposed plate material 10 is transferred from the exposure section 4 to the next process. transport. In the next step, the unexposed portions of the plate material 10 are eluted using water or the like to obtain a printing plate having concave and convex portions corresponding to the image areas of the negative film original.

As explained above, the interleaving paper discharge device according to the present invention has a roller pressed against the interleaving paper, and the interleaving paper is discharged by the rotation and movement of this roller.
The interleaving paper can be reliably removed from the plate material regardless of the quality of the interleaving paper, and the structure of the device itself is simple because no vacuum pad or the like is used, making it extremely suitable as a paper discharging device incorporated in a part of an automatic exposure machine.

[Brief explanation of the drawing]

FIG. 1 is a front view of an automatic exposure machine to which a slip sheet discharging device according to the present invention is applied, FIG. 2 is a plan view of the same automatic exposure machine, and FIG. 3 is a perspective view of a slip paper discharging device according to the present invention. Fig. 4 is a front view showing the interleaving paper discharging device in a standby state, Fig. 5 is a front view showing the interleaving paper discharging device in the middle of discharging, and Fig. 6 shows the state of the interleaving paper discharging device after completion of discharging. It is a front view. In addition, in the drawing, 1 is an automatic exposure machine, 2 is a plate material supply section,
3 is a plate material conveyance section, 4 is an exposure section, 5 is a paper receiving box, 8
is a plate material supply lifter, 9 is a trolley, 10 is a plate material, 1
1 is the paper, 16 is the fixed frame, 17 is the support, 18, 2
8 is a spring, 19 is a support body, 20 and 22 are cylinder units, 25 is a moving body, 27 is a support pin, and 30 is a roller.

Claims (1)

[Claims] 1. In a paper discharging device that sequentially discharges interleaving papers 11 interposed between a large number of stacked plates 10 from the top, this paper discharging device is a support provided near the stacked plates 10. a support 19 that can be moved vertically by a support 17; a moving body 25 that is horizontally movable supported by a rod 23 passing through the support 19 and disposed above the printing plate 10; The roller 30 is attached to the roller 30 and presses against the interleaving paper 11 on the plate material 10 by lowering the support 19 when discharging the interleaving paper, and is rotationally driven by a motor 29 in the direction of discharging the interleaving paper. An interleaving paper ejecting device featuring: