JP2000335765A - Feeding device for cut-plate sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding device for cut-plate sheets capable of feeding/ discharging the sheets one by one to the subsequent process from a blade sheet pile, even if a blocking phenomenon is caused. SOLUTION: This feeding device for cut-plate sheets is made up of a gate- type frame 1, a slide unit 6 movable backwards and forwards along the guide rails 4 extended between the front and rear pillars of the gate-type frame 1, lift arms 8 turnable around a center of the lower end of the slide unit 6, a main attraction pad 10 and auxiliary attraction pad 11 fitted to each lift arm 8, mechanisms 12 for vertically moving the auxiliary attraction pad 11, blowers 13 for blowing ionized air between paper sheets, pinch rollers 14, 14' provided to the front part of the gate-type frame 1, slide cylinders 7 for moving the slide unit 6 backwards and forwards, and a turning cylinder 9 for turning the lift arm 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a method for automatically loosening a cut sheet pile of a plastic sheet or file.
The present invention relates to a feeder for a cut sheet that stably supplies and discharges individual sheets.

[0002]

2. Description of the Related Art In general, sheets are accumulated and stored in a form such as a cut plate in which sheets are stacked with their end faces aligned. Conventionally, the single-wafer sheet stack has often been manually fed into various processing apparatuses one by one. Even in the case of mechanization, it is only possible to lift and transfer one sheet using a simple vacuum suction cup, and smooth handling is often not performed.

The reason for this is that the sheet stack is compressed by its own weight and by band binding to prevent collapse of the load, and the air between the sheets is discharged and adheres to each other, and furthermore, the sheets adhere to each other due to static electricity. The sheets may stick to each other. Then, the sheet-by-sheet stack becomes like a single lump, and it is difficult to peel off each sheet unless a certain amount of external force is applied. This phenomenon is hereinafter referred to as a blocking phenomenon.

A device has been tried to bend a part or the whole of a single-sheet stack to loosen the sticking between the sheets, with respect to the single-sheet stack having caused the blocking phenomenon. It was difficult to peel off one by one. Depending on the processing equipment in the next step, for example, in the case of crushing a single sheet in order to recycle, it may not always be necessary to make one sheet at a time, but the number of sheets sent at one time is as constant as possible. Needless to say, it is desirable that

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide an apparatus capable of supplying / discharging sheet-by-sheet sheets one by one to the next step even if a blocking phenomenon occurs. Is to provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a portal frame and a movable front and rear direction along a guide rail extending between front and rear columns of the portal frame. A slide unit, a lift arm rotatable about the lower end of the slide unit, a main suction pad and a sub suction pad attached to the lift arm, a mechanism for moving the sub suction pad up and down, and It consists of a blower that blows ionized air, a pinch roller provided at the front of the portal frame, a slide cylinder that moves the slide unit back and forth, and a rotary cylinder that rotates the lift arm. Further, it is desirable to add a separation bar for moving between the sheets and separating the sheets from each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has been made by paying attention to the fact that the degree of sticking or the like at the end of a single sheet stack is small even if a blocking phenomenon occurs. Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a main part of the apparatus of the present invention, and FIG. 2 is a perspective view showing a main part in a state where one sheet has begun to be peeled off.

In FIG. 1, a portal frame 1 is provided, and a bogie 3 on which a single sheet stack 2 is placed is accommodated below the portal frame 1. The carriage 3 has a mechanism (not shown) for adjusting the height position of the uppermost part of the single sheet stack 2. Portal frame 1
Guide rail 4 is provided across the pillars before and after
A slide unit 6 is provided, which can be moved back and forth by saddle portions 5 and 5 ′ holding the guide rail 4.

The slide unit 6 can be moved back and forth by a slide cylinder 7 attached to the portal frame 1. The slide unit 6 is provided with a plurality of lift arms 8 having a rotation center attached to a lower part of the slide unit 6. The lift arm 8 has a horizontal position (the suction pad contacts the top of the sheet stack) and a retracted position (positions shown in FIG. 2) by rotating cylinders 9 having both ends attached to the slide unit 6 and the lift arm 8. (Ie, a position distant from the top of the sheet stack).

The rotation of the lift arm 8 may be performed by lowering by the rotary cylinder 9 and return operation by the spring 16. A main suction pad 10 and a sub suction pad 11 are attached to the front of the lift arm 8 in the left-right direction. The main suction pad 10 and the sub suction pad 11 may be suction cups or may have a reduced pressure suction mechanism. It is desirable that the main suction pad 10 correspond to the uppermost position of the sheet stack 2 when the horizontal position is taken. The sub suction pad 11 can be moved up and down by a vertical movement mechanism 12, for example, a cylinder mechanism, a cam mechanism, or a reversible rotation motor mechanism (shown as a cylinder mechanism in the figure). The significance of moving up and down will be described later.

A blower 13 that blows ionized static elimination air between the single sheets is provided on the front horizontal column of the gate-shaped frame 1.
Is provided. A pair of blowers 13 are provided at least near the left and right ends of the gate-shaped frame 1. Preferably, one or more are provided also in the middle part. In addition, pinch rollers 14 and 14 ′ for transporting each leaf sheet are provided on the front horizontal column of the gate-shaped frame 1 at a position that does not interfere with the blower 13.

At least one pair of left and right pinch rollers 14, 14 'is provided. Beyond the pinch rollers 14, 14 ',
An appropriate transport mechanism, for example, a feed roller, a feed belt, a chute, or the like is provided and connected to a desired processing device (both are not shown). It is extremely preferable to provide the peel bar 15 that moves back and forth between the front and rear columns of the gate-shaped frame. The basic configuration of the feeder for cut sheet of the present invention is as described above.

The operation of the feeder for a cut sheet according to the present invention will be described below. The single sheet stack 2 placed on the carriage 3 is fixed to a predetermined position of the gate-shaped frame 1. After adjusting the uppermost position of the single sheet stack 2, the lift arm 8 is lowered by the rotating cylinder 9 so that the main suction pad 10 and the sub suction pad 11 are separated from the single sheet stack 2.
Is pressed lightly on the uppermost surface of the sheet, and is sucked on one uppermost sheet by a suction cup or a reduced pressure suction mechanism. The lift arm 8 is returned to the original posture by the rotating cylinder 9.

When the edge of one of the uppermost single sheets is lifted with the lift arm, the static elimination air ionized by the blower 13 is blown between the single sheets. Since the discharged air to be discharged is ionized, even if it is charged as the sheet stack 2, it is de-energized and adheres due to the charge between the lifted sheet 17 and the sheet stack 2. Sticking is also eliminated, and by the blowing force of air,
The sheet 17 is separated from the sheet stack 2.

Next, the suction of the sub-adsorption pad 11 with the lifted sheet 17 is released, and the sub-adsorption pad 11 is retracted above the lift arm 8 by the vertical movement mechanism 12 of the sub-adsorption pad 11. The tip of the sheet 17 hangs down while being sucked by the main suction pad 10. At the same time, the sub suction pad 11 does not interfere with the pinch rollers 14, 14 'even when the lift arm 8 is advanced. In this state, when the slide arm 7 is operated to move the lift arm 8 forward, the hanging sheet 17
Is pinched by the pinch rollers 14, 14 'and transferred to the outside.

If the single sheet stack 2 is firmly adhered to each other, the operation of pressing the main suction pad 10 and the sub suction pad 11 lightly on the single sheet and returning it to the original position is repeated a plurality of times. Thereby, at least the end corners are separated from the sticking. Further, when the sticking is strong, the sticking is released by repeating the vertical operation of only the sub suction pad 11 a plurality of times while the main suction pad 10 and the sub suction pad 11 are lightly pressed against the sheet. You.

If the sticking of the single sheets is particularly strong at the central portion and the dissociation is insufficient with only the blower 13, the single sheets 17 and the single sheet stack 2 having dissociated edges are separated. It is extremely preferable to move the peeling bar 15 back and forth through the gap to complete the peeling of the single sheet 17. It goes without saying that an appropriate control mechanism, for example, a control mechanism using a microcomputer, can be used to control the above-described operation mechanism.

[0018]

According to the feeder for a cut plate sheet of the present invention, completely automatic operation becomes possible except for setting a single sheet stack. In addition, when the subsequent processing device is a crushing device for recycling single sheets, workers are released from the noise and heavy working environment that have been troubled during manual processing.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of the device of the present invention.

FIG. 2 is a perspective view of a main part showing a state where one sheet has begun to be peeled off.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Gate-shaped frame 10 Main suction pad 2 Single-sheet sheet pile 11 Sub suction pad 3 Cart 12 Vertical movement mechanism 4 Guide rail 13 Blower 5, 5 Saddle part 14, 14 'Pinch roller 6 Slide unit 15 Peeling bar 7 Slide cylinder 16 Spring 8 Lift arm 17 Single sheet 9 Rotating cylinder

Claims (2)

[Claims] 1. A gate-shaped frame, a slide unit movable back and forth along a guide rail inserted between front and rear columns of the gate-shaped frame, and a lift rotatable around a lower end of the slide unit. Arm, a main suction pad and a sub suction pad attached to the lift arm, a mechanism for moving the sub suction pad up and down, a blower for blowing ionized air between the sheet sheets, and a front part of the portal frame. A feeder for a cut sheet comprising a pinch roller provided, a slide cylinder for moving a slide unit back and forth, and a rotary cylinder for rotating a lift arm. 2. A cut plate sheet feeding apparatus according to claim 1, further comprising a separation bar for moving between the single sheets and separating the single sheets from each other. Feed device.