JP2001039568A - Joint paper take out device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To take out laminated sheets one by one without damaging a press plate by applying a force from an abutting portion in substantially parallel with a laminated sheet surface to separate the laminated sheets from the press plate under them, grabbing the separated portion with a laminated paper grabbing means to take out the entire laminated sheets from a storing portion. SOLUTION: When laminated sheets 5 is taken out from a cassette 30 having alternately press plates 4 and the laminated sheets 5, a bracket 212 is lifted down, the tip of an abutting plate 264 of a double-take out preventing mechanism 246 is abutted on the laminated sheets 5, and then a suction surface 242 of a laminated sheet suction pad 231 is brought into contact with the laminated sheet 5. In abutting of the abutting plate 264 on the laminated sheet 5, the abutting plate 264 rotates counterclockwise about a fold 261. Therefore, the tip of the abutting plate 264 applies a force in the X-direction to the laminated sheet 5, the end of the laminated sheet 5 abuts on the palate guide 52, and thereby a part of the laminated sheet 5 is pressed up. As a result, subsequent suction of the laminated sheet 5 by the suction pad 231 and take-out upward are smoothly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slip sheet take-out device for taking out a slip sheet from a storage section in which printing plates and slip sheets are alternately stacked.

[0002]

2. Description of the Related Art A slip sheet take-out device is used in a plate supply device for automatically supplying a plate to an image recording device. FIG. 6 is a diagram showing the internal structure of a plate supply device 2 for supplying a plate to an image recording device (not shown). In the cassette 30, a plurality of printing plates 4 and interleaf sheets 5 for preventing the printing plates 4 from rubbing each other are alternately stacked.

The leading end of the plate 4 is gripped by the plate suction pad 82 of the plate pad unit 81 and is taken out of the cassette 30, and a pair of discharge rollers 153 and 154 are provided.
Transported to. The pair of discharge rollers 153 and 154 are
The printing plate 4 is sent out to an image recording device (not shown).

On the other hand, the interleaf paper 5 includes an interleaf paper pad unit 19.
The leading end is gripped by one of the slip-sheet suction pads 231. The slip sheet 5 includes a nip roller 199 and a slip sheet discharge roller 2.
It is lifted until it is sandwiched between 06. Insert 5
By the rotation of the nip roller 199 and the interleaf discharge roller 206, the paper is discharged from the interleaf discharge hole 53 to the outside of the plate supply device 2.

The detailed configuration of the plate supply device 2 is as follows.
Patent application by the applicant (patent application 1999-5028)
0), and will not be described in detail here.

The slip sheet 5 is fixed by suction by the slip sheet suction pad 231. If the slip sheet 5 is air-permeable, the slip sheet suction pad 231 passes through the slip sheet 5 and the printing plate 4 thereunder.
May also be adsorbed and fixed. Even when the slip sheet 5 has no air permeability, the printing plate 4 may adhere to the back surface of the slip sheet 5 due to static electricity.

Thus, the printing plate 4 is placed on the slip sheet 5 being taken out.
Is attached, the interleaf pad unit 191 causes the interleaf 5
In addition, since the printing plate 4 is also transported, a jam occurs in the transport path, and the slip sheet 5 is not normally discharged. In this specification, this problem is referred to as a two-sheet taking problem.

[0008] One of the conventional methods intended to solve the above-mentioned two-sheet taking problem will be described below.

[0009] As shown in FIG.
The bracket 212 of the 91 is attached to the first vertical belt 225 and the first guide shaft 210 which are rotated by a driving device (not shown), so that they can be moved up and down.

As shown in FIG. 7, two vertical shafts 236 are attached to both ends of the lower surface of the bracket 212 in the Y direction (the direction perpendicular to the plane of FIG. 7). On these vertical shafts 236, pad holding plates 237 long in the Y direction are provided so as to be vertically movable with respect to the brackets 212. The pad holding plate 237
Is urged downward (−Z direction) by a spring 241 around the vertical shaft 236.

FIG. 7 is an enlarged view of the vicinity of the slip pad 231 of the slip sheet pad unit 191. As shown in FIG.

The pad holding plate 237 has a rod 238 and an interleaf paper suction pad 231 attached to its lower surface, and a connecting plate 239 and a pressing rod 240 attached to its side surface. The drawing of the suction pipe communicating with the slip sheet suction pad 231 is omitted. Push rod 240 and rod 2
38, each length of the interleaf paper suction pad 231 is
No. 0 suction pad 2 for non-operation (non-suction)
The height is set to be substantially the same as the height of the suction surface 31.

Thereafter, when a suction pump (not shown) is operated, the slip sheet 5 is sucked and fixed to the slip sheet suction pad 231. FIG. 8 illustrates this stage. The slip-sheet suction pad 231 contracts, and the slip-sheet suction surface rises accordingly. On the other hand, the height of the tip of the pressing rod 240 is not changed. Therefore, only the portion of the slip sheet 5 that is sucked and fixed to the slip pad for suction pad 231 is lifted, and the slip sheet 5 is bent at an angle r1 at the tip end of the pressing rod 240.

The interleaf paper 5 has low elasticity and thus can be bent. However, since the printing plate 4 has higher elasticity, the printing plate 4 has high elasticity.
Does not follow the bending of the slip sheet 5. Therefore, a gap is generated between the back surface of the slip sheet 5 and the printing plate 4.

After that, even if the interleaf suction pad 231 is raised, there is a gap between the interleaf 5 and the printing plate 4 therebelow. The lower printing plate 4 is not fixed by suction, and the problem of taking two sheets does not occur.

Further, even if the printing plate 4 adheres to the back surface of the interleaf paper 5 due to static electricity, the interleaf suction pad 2
As the height of the printing plate 4 rises, the gap increases due to the weight of the printing plate 4, so that the problem of taking two sheets can be prevented.

[0017]

BACKGROUND OF THE INVENTION Printing plates are generally thin sheets of metal and are vulnerable to impact. Therefore, at the time of suction fixing, the pressing rod 2
When pressed by 40, there is a risk of damage such as dents and scratches. When the printing plate 4 suffers such damage,
The quality of the image created by the printing plate 4 deteriorates. Therefore, an object of the present invention is to provide an interleaf paper take-out device which can take out interleaf sheets one by one without damaging the plate from a storage portion in which the plate and the interleaf are stacked. .

[0018]

According to a first aspect of the present invention, there is provided a storage unit for storing alternately stacked printing plates and interleaving paper, and a holding unit for gripping an uppermost interleaving paper among the storing units. A sheet gripping means, a slip sheet gripping means moving means for causing the slip sheet gripping means to approach the slip sheet, and separating the slip sheet from the slip sheet, and a contact portion contacting the uppermost slip sheet. By moving the contact portion, a force in a direction substantially parallel to the surface of the interleaf is applied to the interleaf, so that the interleaf of the portion gripped by the interleaf gripping means is removed from the plate below the interleaf. A slip sheet separating means for separating the slip sheet, and a control means for releasing the slip sheet from the slip sheet holding means when the slip sheet holding means is moved to a desired position by the slip sheet holding means moving means. It is a slip sheet take-out device.

According to a second aspect of the present invention, in the first aspect of the present invention, the slip sheet gripping means moving means has a pedestal for holding the slip sheet gripping means, and the slip sheet separating means contacts the slip sheet separating means. The unit is a slip sheet take-out device, which is connected to the pedestal.

According to a third aspect of the present invention, in the second aspect of the present invention, the abutting portion is rotatably connected to the pedestal, and the rotation of the abutting portion allows the abutting portion to rotate with respect to the slip sheet. An interleaf paper removing device for applying a force in a direction substantially parallel to the interleaf paper surface.

According to a fourth aspect of the present invention, in the third aspect of the invention, the slip sheet holding means has a suction cup for sucking and fixing the slip sheet, and the abutting portion contacts the slip sheet. The front is a slip sheet take-out device, which is located at a position closer to the slip sheet than the suction surface of the suction cup.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the storage portion includes:
A slip sheet take-out device, wherein a guide portion that regulates the movement of the slip sheet in a direction substantially parallel to the slip sheet surface is provided.

[0023]

FIG. 1 is a front view of a slip sheet pad unit 191 according to the present invention. FIG. 2 is a top view of the unit 191. FIG. This unit 191 is a part of the plate supply device 2 described with reference to FIG.
Is as described above.

The bracket 212 which is long in the Y direction is attached to the first slider 219 and the second slider 220, and applies a vertical driving force by the interleaf pad unit driving motor 227, the rotating shaft 229, the belts 225 and 226, and the like. Can be

The pad holding plate 237 is connected to the bracket 212
Is inserted through the vertical shafts 236 and 236 immediately below the bracket 212 so as to be vertically movable with respect to the bracket 212.

The pad holding plate 237 is a member elongated in the Y direction having a U-shaped cross section cut in the XZ plane. Nine slip-sheet suction pads 231 are attached to the bottom surface by attachment screws 253, respectively. Further, on the side surface on the −X direction side (see FIG. 2), two two-sheet take-off prevention members 246 are provided between the third and fourth slip-sheet suction pads 231, and the sixth and seventh sheet-feeding suction pads 231. It is mounted between the second interleaf suction pads.

FIG. 3 is a side view showing the structure near the two-sheet taking prevention mechanism 246. A part of the cassette 30 is also shown. This figure shows a stage in which the bracket 212 has been lowered until a part of the two-sheet take-out prevention mechanism 246 (a tip of an abutting plate 264 described later) abuts on the surface of the slip sheet 5.

The two-sheet taking prevention member 246 is mainly provided with the frame 25.
1, a plate 260, and a contact plate 264.

The frame body 251 is formed by bending a sheet metal having a required cut at three places.
47, a left side piece 248, a fixed piece 249, and a bottom side 250 parallel thereto. Note that the left piece 248 is not shown in FIG.

The two-sheet take-off preventing member 246 has its fixing piece 2
49 and the pad holding plate 237 are fixed to the pad holding plate 237 by connecting them with the connecting bolts 252.

The plate 260 is attached to the right mounting piece 256
And a left mounting piece 258 (not shown in FIG. 3; see FIGS. 1 and 2). These mounting pieces 256,
258 is fixed to the right side piece 247 and the left side piece 248 of the frame body 251 by mounting screws 254. Thus, the plate 260 is connected to the pad holding plate 237 through the frame 247.

The plate 260 is a leaf spring bent at the position of the fold 261, and its tip has a rotational moment about the fold 261 in the direction of arrow f.

Further, left and right side pieces 247 of the frame 251 are provided.
Between 248, a regulating shaft 266 is provided.
This member is a member for limiting the rotation of the plate 260.

A contact plate 264 is fixed to the tip of the plate 260 by bolts 262. Applicable contact plate 264
Is a member that comes into contact with the slip sheet 5 in the cassette 30 as described later, and is made of rubber.

As shown in FIG. 3, when no external force is applied to the plate 260, the tip of the contact plate 264 is lower than the suction surface 242 of the slip-sheet suction pad 231 in the non-suction stage. In the table, dimensions and the like of each member are set. The X coordinate of the position where the tip of the contact plate 264 contacts the slip sheet 5 is defined as x1.

The X-direction end surfaces of the printing plate 4 and the slip sheet 5 stored in the cassette 30 are regulated by a plate guide 52 mounted on a bottom plate of the cassette 30.

(Explanation of operation)

The bracket 212 is further lowered to bring the suction surface 242 of the slip sheet suction pad 231 into contact with the slip sheet 5.

The leading end of the contact plate 264 comes into contact with the slip sheet 5 with the downward movement. At this time, the contact plate 264 is
It rotates counterclockwise about 1. By this rotation, the leading end of the contact plate 264 applies a force to the slip sheet 5 in the X direction (horizontal direction; a direction substantially parallel to the surface of the slip sheet 5).

Since the material of the contact plate 264 is a non-slip rubber, the tip of the contact plate 264 does not slide on the surface of the slip sheet 5 during the rotation.

FIG. 4 shows the suction surface 2 of the slip-sheet suction pad 231.
It is a figure which shows the stage which descended until 42 contacted the uppermost slip sheet 5. FIG. As shown in this figure, the X coordinate of the tip end position of the contact plate 264 has moved by a distance dx from x1 to x2. As described above, since the contact plate 264 does not slide on the slip sheet 5, the slip sheet 5 also moves by the same distance.

However, since the movement of the end of the interleaf 5 in the X direction is regulated by the plate guide 52 of the cassette 30, a part of the interleaf 5 is pushed up and the two-sheet take-out prevention mechanism 2
An inflatable portion 268 extending from immediately below 46 to the front and rear in the Y direction (direction perpendicular to the paper surface) is formed for each two-sheet taking-out prevention mechanism 246.

In this figure, the expansion portion 268 is shown on the suction surface 242 of the slip-sheet suction pad 231. However, actually, the slip-sheet suction pad 231 and the two-sheet removal prevention mechanism 246 are shown. Are shifted in the Y direction (see FIG. 1).

FIG. 5 shows a stage in which the interleaf paper suction pad 231 starts suctioning by a suction pump (not shown). The suction pad 231 for interleaf paper contracts and its suction surface 242
Rises. Even if the uppermost slip sheet 5 and the lower printing plate 4 are in close contact with each other due to static electricity, they are still inflated at the expansion portion 268 formed in the stage of FIG. 4 (before the start of suction).
It has come out of close contact because of. Therefore, the interleaf suction pad 231 does not adsorb and fix the printing plate 4 thereunder through the interleaf 5.

Further, even when the slip sheet 5 is made of a material having high air permeability and the slip sheet suction pad 231 may suck the printing plate 4 thereunder through the slip sheet 5, the suction surface 242 may be used.
The space between the interleaving paper 5 and the printing plate 4 therebelow is open to the expansion portion 268 formed at the front and rear positions in the Y direction. Flows, so that the slip-sheet suction pad 231 is
Through which the printing plate 4 thereunder is not fixed by suction.

Thereafter, the bracket 212 rises to a height at which the end of the slip sheet 5 can be sandwiched between the slip sheet discharge roller 206 and the nip roller 199 (see FIG. 6). Next, the first link 197 of the nip roller 199 rotates, and the slip sheet discharge roller 206 and the nip roller 199 are rotated.
When the interleaf paper 5 is sandwiched in between, the suction of the suction pump is stopped under the control of a control device (not shown), and the interleaf paper suction pad 231 releases the interleaf paper. The slip sheet 5 is discharged from the slip sheet discharge hole 53 to the outside of the apparatus by the rotation of the nip roller 199.

As described above, the two-sheet take-off prevention mechanism 246 does not damage the printing plate 4 during the suction process.

In the above-described embodiment, the two-sheet take-off prevention mechanism 246 is connected to the pad holding plate 238 together with the slip-sheet suction pad 231 and moves up and down simultaneously with the slip-sheet suction pad 231. However, the present invention is not limited to this, and the mechanism for preventing two sheets may be attached to another member, for example, the cassette 30.

[0049]

According to the first aspect of the present invention, the abutting portion applies a force in a direction substantially parallel to the surface of the slip sheet, thereby separating the slip sheet from the printing plate thereunder. Further, the slip sheet gripping means grips the separated portion and takes out the entire slip sheet from the storage section. The contact portion separates a part of the slip sheet by applying a force in a direction substantially parallel to the slip sheet surface, so that the printing plate thereunder is not damaged. Moreover, it is possible to reliably prevent the slip sheet from being taken out with the printing plate adhered.

According to the second aspect of the present invention, the operation of the contact portion and the operation of the slip sheet holding means can be easily linked.

According to the third aspect of the present invention, since the substantially horizontal force is applied by the rotation of the contact portion, it is possible to configure the slip sheet take-out device with a simple configuration.

According to the fourth aspect of the invention, before the suction cup comes into contact with the uppermost interleaf sheet, the uppermost interleaf sheet is partially separated from the printing plate by the contact portion in advance. I have. Therefore, since the suction cup can suction-fix the separation portion formed in this way, the suction cup can surely suction-fix only the uppermost slip sheet.

According to the fifth aspect of the present invention, the separation of the slip sheet by the contact portion can be performed more reliably.

[Brief description of the drawings]

FIG. 1 is a front view of a slip sheet pad unit according to the present invention.

FIG. 2 is a side view of the slip sheet pad unit according to the present invention.

FIG. 3 is a diagram illustrating a configuration of a two-sheet taking prevention mechanism according to the present invention.

FIG. 4 is a diagram showing a configuration of a two-sheet taking prevention mechanism according to the present invention.

FIG. 5 is a diagram showing a configuration of a two-sheet taking prevention mechanism according to the present invention.

FIG. 6 is a diagram showing an internal configuration of a conventional plate supply device.

FIG. 7 is a diagram showing a configuration of a conventional two-sheet taking prevention mechanism.

FIG. 8 is a diagram showing a configuration of a conventional two-sheet taking prevention mechanism.

[Explanation of symbols]

 2. . . Plate supply device 4. . . Printing plate 5. . . Insert paper 30. . . Cassette 52. . . Edition Guide 212. . . Bracket 231. . . Suction paper suction pad 236. . . Vertical shaft 237. . . Pad holding plate 238. . . Rod 239. . . Connecting plate 240. . . Press rod 241. . . Spring 242. . . Suction surface 246. . . Two-sheet taking prevention mechanism 260. . . Plate 261. . . Fold 264. . . Contact plate 266. . . Restriction shaft 268. . . Expansion part

Claims (5)

[Claims] An accommodating portion for accommodating alternately stacked printing plates and interleaving paper; an interleaving paper gripping means for gripping an uppermost interleaving paper in the accommodating portion; And an abutting portion moving means for approaching and separating from the interleaving paper, and a contact portion for contacting the uppermost interleaving paper, and moving the abutting portion to cause the interleaving. Interleaving sheet separating means for applying a force to the paper in a direction substantially parallel to the interleaving sheet surface to separate a part of the interleaving paper gripped by the interleaving paper gripping means from a printing plate thereunder; Control means for releasing the slip sheet from the slip sheet holding means when the sheet grip means is moved to a desired position by the slip sheet holding means moving means. 2. The interleaf gripping means moving means includes a pedestal for holding the interleaf gripping means, and a contact portion of the interleaf separating means is connected to the pedestal. The slip sheet take-out device according to claim 1. 3. The abutting portion is rotatably connected to the pedestal, and applies a force to the interleaf in a direction substantially parallel to the interleaf surface by the rotation. 3. The slip sheet take-out device according to claim 2, wherein 4. The slip sheet holding means has a suction cup for sucking and fixing the slip sheet, and the contact portion is closer to the slip sheet than the suction surface of the sucker before contacting the slip sheet. 4. The slip sheet take-out device according to claim 3, wherein the device is located at a position. 5. The storage section is provided with a guide section for restricting the slip sheet from moving in a direction substantially parallel to the slip sheet surface. An interleaf paper take-out device according to the above.