JPH10310255A - Sheet material accumulating method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet material accumulating method and an apparatus capable of reliably accumulating a sheet material such as a PS plate at a low cost with a simple structure, without causing any obstacle. SOLUTION: A sheet material conveyed from the outside is slid on an inclined surface, and the sheet material being slid is electrostatically attracted, braking is applied, then the electrostatic attraction is released, and the sheet material is stacked upright. A sheet material accumulation method is characterized in that the sheet material is conveyed and moved to a sheet material receiving table position to accumulate the sheet materials.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for accumulating sheet materials. For example, a sheet material of a photosensitive material such as a PS plate or a sheet material of an aluminum material is ensured after completion of a coating step, a developing step or a processing step. The present invention relates to a method and an apparatus for accumulating sheet materials on a sheet.

[0002]

2. Description of the Related Art In order to receive a sheet material (PS plate or the like) carried out from an automatic developing machine or another processing machine without damaging the sheet material, the leading end of the sheet material falling by its own weight along an inclined slide plate. Means are taken to stop by sucking air in the middle before reaches the lowest point. Then, the temporarily stopped sheet material is slightly dropped again, and the sheets are sequentially stacked one by one on a waiting sheet material stand having an inclination angle opposite to that of the slide plate while aligning the leading ends.

[0003]

However, since the sheet material (PS plate, etc.) is sucked by air, a suction cup, a vacuum pump, etc. are required, so that the structure is complicated, the cost is high, and the noise of the vacuum pump is easily generated. In addition, there is a problem that if the suction portion is soiled, the suction force is likely to decrease, and if the sheet material is a photosensitive material, fogging is likely to occur at the suction portion.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a sheet material collecting method and a sheet material collecting method capable of reliably collecting sheet materials such as PS plates at a simple structure at a low cost without causing obstacles. It is to provide the device.

[0005]

The above object is achieved by the following means. That is, (1) the sheet material conveyed from the outside is slid on an inclined surface, and the sheet material being slid is electrostatically attracted and braked, and then the electrostatic attraction is released;
A sheet material accumulating method, wherein the sheet material is conveyed to a sheet material receiving table position where the sheet material stands up and is accumulated and the sheet material is accumulated.

(2) In a sheet material accumulating apparatus for accumulating sheet materials carried out from the outside, a sliding means having an inclined surface on which the sheet material carried out from the outside slides;
Electrostatic attraction means for releasing the electrostatic attraction after electrostatically attracting and braking during sliding of the sheet material, a sheet material receiving stand provided at a position where the sheet material is set up and stacked, A sheet material accumulating device, comprising: conveying means for conveying and moving the sheet material from a position at which the material is released from electrostatic attraction to a position of the sheet material receiving table.

Here, the sheet material is a sheet-like material.
For example, photosensitive material, plain paper, plastic sheet, high quality paper, tracing paper, PPC paper and the like. Examples of the photosensitive material include PS plates, print inspection papers, and color papers. The sheet material also includes a sheet material in the middle of the processing step or the processing step, for example, after the coating step and the developing step.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to embodiments, but embodiments of the present invention are not limited thereto.

FIG. 1 is a side view of an embodiment of the sheet material accumulating apparatus according to the present invention, FIG. 2 is a plan view of an electrostatic attraction plate, and FIG. 3 is a plan view of an electrostatic attraction plate and a slide plate. 4 is a sectional view of the slide plate of FIG. 3, and FIG. 5 is a side view of the electrostatic attraction plate and the slide plate of FIG.

In FIG. 1, a developing machine 11 is a device for developing a sheet material S. After the sheet material S is developed, the developing device 11 is fed by a pair of rollers 12 and fed by a guide roller 1.
5 and is carried out to the sheet material stacking device. The sheet material S is, for example, a developed, washed, and dried sheet material. The sensor L1 turns on the electrostatic attraction plate when the leading end of the sheet material S is detected. The sliding plate 201, which is the sliding means 200, is fixed at an angle of θ1 with respect to the base 101, has an inclined surface on which the sheet material S carried out from the outside slides, and the sheet material S slides down smoothly with little friction. Is available. Also,
The lower end of the sliding plate 201 is fixed on the gantry 103. Also, a stopper 202 provided on the sliding plate 201
(FIG. 1) is fixed on a gantry 102 provided on a base 101. In addition, as a material of the convex portion 205 of the sliding plate 201, a PVC material having a high sliding property, a high molecular weight polyethylene material, a SUS material, or the like is preferably used. As shown in FIG. 4, the cross section is formed in a corrugated shape with a convex portion 205 and a concave portion 206, and further has a concave portion 207 in the middle of the concave portion 206, and the portion is fixed to the substrate 209 by screws 208. Has become. The sheet material S slides down while contacting the convex portion 205. The sensor L2 provided on the sliding plate 201 detects the leading end of the sheet material S sliding on the sliding plate 201, and when it is detected, a timer (not shown) is activated and the suction is turned off after a lapse of a predetermined time. ing.

Next, the electrostatic attraction means 500 applies a braking force by electrostatically attracting the sheet S while sliding on the inclined surface. The electrostatic attraction means may be of a divided electrode type that can be divided and partially attracted, instead of the full-surface electrode method of electrostatically attracting the entire surface, and may be partially electrostatically attracted according to the size of the sheet material. . 2A and 2B, the electrostatic attraction plate 501 serving as an electrostatic attraction means will be described in more detail. FIG. 2A shows an electrostatic attraction plate of a full-surface attraction type, and FIG. It is a board. The electrostatic attraction plate 501 is the substrate 50
2, plus electrode 503, minus electrode 504, adsorption layer 5
05. In addition, an air hole 506 is provided in the electrostatic attraction plate 501 of FIG. 2B, and when the sheet material is electrostatically attracted, the air enters between the sheet material and the electrostatic attraction plate to lower the attraction force. It is designed to prevent that.
In addition, the air hole 506 may be provided in the entire surface suction method.

The voltage applied to the electrostatic attraction plate is from 1 kV to 3 kV.
It is about. When the applied voltage of the photosensitive PS plate, the photosensitive cut film or the like is about 1 kV to 3 kV, no abnormalities such as static marks and fogging are recognized in the photosensitive material. The electrostatic attraction means 500 switches the applied voltage to a reverse voltage or a ground potential to release the attraction of the sheet material. The electrostatic attraction means 500 is integrally formed with the sliding means 200 as shown in FIG. Further, the electrostatic suction means 500 is provided with a sensor L provided near the sliding means 200 for detecting passage of the sheet material S.
Release is performed based on the information of No. 2. In addition,
The sensor L1 in FIG. 1 turns on the electrostatic attraction plate. As another method, a sensor for detecting the leading end of the sheet material may be provided at the center of the inclined surface of the sliding means 200, the electrostatic attraction plate may be turned on by the detection, and turned off after a predetermined time.

Next, the conveying means 300 conveys the sheet material from the position where the electrostatic attraction of the sheet material S is released to the sheet material receiving table 400 at the accumulation position of the sheet material S. In the conveyance, the conveyance means 300 operates up to the rotation angle θ2 in FIG. 1 by the rotation of the drive motor 111 provided on the base 101. More specifically, a tilting plate 312 having a rotation support shaft 302 as a transport means 300 is connected via a connecting rod 114 connecting a pin 113 and a pin 115 on a crank disk 112 directly connected to a rotor shaft of the drive motor 111. Shaft 32
Numeral 1 holds the sheet material S around the bearing member 121 and rotates. The shaft 321 is provided so as to be sunk 1 to 3 mm from the surface of the tilt plate 312. In addition, the sheet material receiving base 400 is fixed on the base 101 at an angle θ3 and is stacked with the sheet materials S upright.

Here, the operation of the sheet material accumulating apparatus will be described. First, the sheet material S is sent out by the sending pair roller 12 in the developing machine 11, guided by the guide roller 15, and carried out to the sheet material stacking device. At this time, when the leading end of the sheet material S is detected by the sensor L1, the electrostatic attraction plate is turned on. Next, the sheet material S is a sliding plate 201.
, And the leading end of the sheet material S is attracted by the electrostatic attraction plate 501 provided on the sliding plate 201, the suction is surely achieved before reaching the lowermost position, and stops halfway. The sheet material S slides on the sliding plate 201, and when the leading end of the sheet material S is detected by the sensor L2, a timer operates, and after a lapse of a certain time, the electrostatic attraction is turned off. Within the set time of the timer, the sheet material S is braked by the suction of the electrostatic suction plate 501 and temporarily stops halfway. In such a state, when the set time of the timer elapses, the electrostatic attraction is released. Further, the drive motor 111 starts operating, and the tilt plate 312 rotates while holding the sheet material S. Then, the sheet material is delivered onto the sheet material receiving base 400 and is stacked. At the same time, the transport means 300 is
Is returned to the original position by the reversal of, and the sheet material S that slides down next is received.

In the first embodiment, the sliding means 200 and the electrostatic attraction means 500 are integrally formed. However, the sliding means 200 and the electrostatic attraction means 500 may be formed separately.

(Embodiment 2) Embodiment 2 is a modification of Embodiment 1 in which the electrostatic suction means and the transport means are integrally formed. FIG. 6 is a configuration diagram of a main part of another sheet material accumulating apparatus. FIG. 6A is a plan view of an integrated configuration of an electrostatic suction unit and a conveying unit, and FIG. 6B is a cross-sectional view thereof. 6 (c)
FIG. 4 is a cross-sectional view of another electrostatic attraction means. 1 and 2 are denoted by the same reference numerals and the description thereof is omitted.

In the figure, the tilt plate 312 has a shaft 321,
It is composed of an electrostatic attraction plate 501, a sensor L2, a rotation support shaft 302, etc., slides a sheet material S carried out from the outside, releases the electrostatic attraction of the sheet material, and rotates while holding the sheet material. ing. Electrostatic attraction plate 50 of electrostatic attraction means 500
Numeral 1 is applied with an electrostatic attraction plate to apply braking while the sheet material S slides, and is configured integrally with the tilt plate 312. Also,
The electrostatic attraction means 500 includes a plurality of electrostatic attraction plates 501 in FIG. 6B, and one electrostatic attraction plate 5 in FIG.
01. The electrostatic attraction plate 501 switches the applied voltage to a reverse voltage or a ground potential to release the sheet material from being attracted. The sensor L2 is provided on the shaft 321 to detect the passage of the sheet material and to release the electrostatic attraction plate. In addition, the electrostatic attraction means 500 is shown in FIG.
As shown in (b), a split electrode system may be used, and the electrostatic attraction may be partially performed according to the size of the sheet material. The tilting plate 312 as a conveying means conveys and moves the sheet material to the sheet material receiving base 400 from a position where the electrostatic attraction is released.

Here, the main operation will be described with reference to FIGS. 1, 2 and 6. The sheet material S carried out from the outside slides on the shaft 321 and the sheet material S is moved by the electrostatic attraction plate during the sliding. 50
The brake is applied by suction at 1, and then released. Further, the sheet material S is accumulated by the tilt plate 312 rotating around the rotation support shaft 302 and moving to the sheet material receiving base 400.

(Embodiment 3) Embodiment 3 is a modification of Embodiment 1 and has a structure in which the electrostatic attraction means is integrated with the transport means. FIG. 7 is a main part configuration diagram of another sheet material accumulation device.
More specifically, FIG. 7A is a plan view and a side view of a main portion of another sheet material stacking device, and FIG. 7B is a plan view of a main portion of another sheet material stacking device. 1 and 2 are denoted by the same reference numerals and the description thereof is omitted.

In FIG. 7A, the tilt plate 312 includes an electrostatic chuck plate 501, a sensor L2, a rotating shaft 302, and a convex portion 313.
And so on. The sheet material S slides on the convex portion 313, is electrostatically attracted and released by the electrostatic attraction plate 501 as the electrostatic attraction means 500, and is further moved to the sheet material receiving table. The electrostatic suction means 500 switches the applied voltage to a reverse voltage or a ground potential to release the suction of the sheet material.
In addition, as shown in FIG. 2B, a divided electrode system may be used, and the electrostatic attraction may be partially performed according to the size of the sheet material. The passage of the sheet material S is detected by the sensor L2, and the electrostatic attraction plate is released.

Here, the main operation will be described with reference to FIGS. 1, 2 and 7 (a). The sheet material S carried out from the outside slides on the shaft 321 and the sheet material S stays static during sliding. The brake is applied by being attracted by the electro attraction plate 501, and then released. Further, the sheet material is composed of the tilt plate 312 and the rotation support shaft 30.
2 and is moved to and stacked on the sheet receiving table 400.

Further, another embodiment will be described with reference to FIG. 7B, focusing on parts different from FIG. 7A. In the figure,
The tilt plate 314 has a carbon shaft 31 on a substrate 315.
6 are further provided, and the electrostatic attraction plate 501, the sensor L
2. A rotation support shaft 302 is provided. A U-shaped part 317 is fixed to the tip of the carbon shaft 316. The electrostatic suction plate 501 has an air hole 506.

Here, the main operation will be described with reference to FIGS. 1, 2 and 7 (b). The sheet material S carried out from the outside slides on the carbon shaft 316 on the tilt plate 314,
During this sliding, the brake is applied by being attracted by the electrostatic attraction plate 501 and then released. Further, the sheet material S is stacked on the sheet material receiving base 400 by rotating the tilt plate 314 about the rotation support shaft 302.

[0024]

As described above, the following effects can be obtained.

According to the first and second aspects, the sheet material conveyed from the outside is slid on the inclined surface, and the sheet material is sucked by the electrostatic attraction during the sliding of the sheet material to apply the braking force. Since the sheet material is conveyed and moved from the position where the sheet material is accumulated to the accumulation position where the sheet material is accumulated, the sheet material can be reliably accumulated at a simple structure at a low cost without causing any obstacle to the sheet material.

According to the third aspect of the present invention, the electrostatic attraction means is of a divided electrode type, and the electrostatic attraction is partially performed according to the size of the sheet material. Sheet materials can be reliably accumulated.

According to the fourth aspect, since the electrostatic attraction means is provided integrally with the sliding means, the mechanism is simpler and the cost is reduced.

According to the fifth aspect, since the electrostatic attraction means is provided integrally with the transport means, the mechanism is simpler and the cost is reduced.

According to the sixth aspect, since the electrostatic attraction means switches the applied voltage to the reverse voltage or the ground potential to release the electrostatic attraction of the sheet material, the electrostatic attraction of the sheet material is more reliably released. .

According to the seventh aspect, the electrostatic attraction means performs the electrostatic attraction and / or the release of the electrostatic attraction based on the information from the sensor for detecting the passage of the sheet material provided near the sliding means. In addition, the timing and operation of the electrostatic attraction of the sheet material and the release of the attraction are ensured.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a sheet material accumulating apparatus according to the present invention.

FIG. 2 is a plan view of the electrostatic suction plate.

FIG. 3 is a plan view of an electrostatic attraction plate and a slide plate.

FIG. 4 is a sectional view of the slide plate of FIG. 3;

FIG. 5 is a side view of the electrostatic attraction plate and the sliding plate of FIG. 3;

FIG. 6 is a main part configuration diagram of another sheet material accumulating apparatus.

FIG. 7 is a main part configuration diagram of another sheet material accumulating apparatus.

[Explanation of symbols]

 101 base 111 drive motor 200 sliding means 201 sliding plate 300 transport means 312 tilt plate 400 sheet material receiving table 500 electrostatic suction means 501 electrostatic suction plate 503 positive electrode 504 negative electrode L1, L2 sensor S sheet material θ1, θ2 , Θ3 angle

Claims (7)

[Claims] 1. A sheet material conveyed from the outside is slid on an inclined surface, the sheet material being slid is electrostatically attracted, braking is applied, then the electrostatic attraction is released, and the sheet material is erected. A sheet material accumulating method, wherein a sheet material is conveyed and moved to a position where a sheet material is to be accumulated to accumulate the sheet materials. 2. A sheet material accumulating apparatus for accumulating sheet materials conveyed from the outside, comprising: a sliding means having an inclined surface on which the sheet material conveyed from the outside slides; Electrostatic attraction means for releasing electrostatic attraction after electroadhesion and braking, a sheet material receiving table provided at a position where the sheet material is erected and accumulated, and a position at which the sheet material is released from the electrostatic attraction And a conveying means for conveying and moving the sheet material to the position of the sheet material receiving table. 3. The method according to claim 2, wherein the electrostatic attraction means is of a divided electrode type which can be divided and partially electrostatically attracted, and partially electrostatically attracts according to the size of the sheet material. The sheet material accumulating device according to the above. 4. The sheet material accumulating apparatus according to claim 2, wherein said electrostatic attraction means is provided integrally with said sliding means. 5. The sheet material accumulating apparatus according to claim 2, wherein said electrostatic attraction means is provided integrally with said transport means. 6. The sheet according to claim 2, wherein the electrostatic attraction means switches the applied voltage to a reverse voltage or a ground potential to release the electrostatic attraction of the sheet material. Material accumulation device. 7. The method according to claim 1, wherein the electrostatic attraction means performs electrostatic attraction and / or cancellation of the electrostatic attraction based on information from a sensor for detecting passage of a sheet material provided near the sliding means. The sheet material accumulation device according to any one of claims 2 to 6.