JP2007161430A - Method and device for stacking flexible sheet-like material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet-like material stacking method and a device capable of temporarily treating a plurality of sheets, by correctly stacking the respective sheets in the same position, by smoothly performing work for stacking a flexible sheet-like material such as a plastic foam sheet. <P>SOLUTION: The sheet-like material is placed in a predetermined position without varying its position, by extracting a conveyor from below the sheet-like material by making a driving speed V<SB>1</SB>coincide with a moving speed V<SB>2</SB>, by moving shafts 5A and 5B of a support roller in the inverse direction of the driving direction of the conveyor simultaneously when driving the conveyor, by using the device composed of an endless belt type conveyor 4 supported and driven by a pair of rollers 3A and 3B arranged in parallel and a moving means reciprocating this conveyor itself between a supply means of the stacking sheet-like material 2 and a stacking position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a stacking method and apparatus that avoids troubles that are likely to occur when a plurality of plastic bubble sheets, foam sheets, and other flexible sheet-like materials are stacked, and can be stacked smoothly. Since the present invention is most effective when it is intended for a plastic foam sheet, the following description will be described with respect to the plastic foam sheet.

A plastic bubble sheet (hereinafter referred to as "bubble sheet") in which a plastic film is vacuum-formed to form a large number of caps, and a flat film is bonded to the bottom of the cap as a back film to form a large number of sealed air chambers. Is abbreviated as “a material for cushioning packaging”, a heat insulating material for buildings, and various curing materials. In particular, when directing for cushioning packaging, obtain cut products or punched products of specific dimensions and shape from a long or cut air bubble sheet, and stack, bundle or wrap many of them. Ships often.

The applicant once developed and disclosed a device that automatically cuts a long sheet-like material, stacks a plurality of sheets, and binds them (Patent Document 1). This device comprises a cutting device that combines a slitter and shearing means, taping means for winding and bundling pieces of cut pieces stacked into blocks, and first and second transfer means. The feature is that the size and number of cut pieces can be automatically determined by computer control.
7-106554

Regardless of whether the above-described automatic cutting and binding apparatus or other apparatus is used, in order to bind or package the cut product or the punched product, a large number of them must be accurately stacked. The normal stacking method follows the principle of extruding the next product on top of the cutting or punching product already placed, sliding it into place, and placing them in the same position. The air bubble sheet is placed so that the smooth back film side is on the top surface, but the side with the cap is uneven and easy to bend, so the next air bubble sheet that slides on the air bubble sheet already placed is caught. It is not easy to stack up smoothly by curling, curling up or folding.

Such a problem becomes more prominent as the bubble sheet has a lower basis weight, that is, the lower the thickness of the bubble sheet made from a thinner film. Ordinary shock-absorbing packaging often does not require a high-weight air bubble sheet, and it can be made in time with a bubble sheet made of a thin film as much as possible from the viewpoint of cost constraints and effective use of resources. desirable. Even if they are stacked to avoid the above troubles, if the positions of the sheets do not overlap correctly, they must be manually aligned again when bundling or wrapping, which is obvious. It is a disadvantage.

Attempts have been made to move the cut bubble sheets in the air stream, and have been successful to some extent, but the problem here is that the bubble sheets must be handled one by one. The processing itself such as cutting and punching of the air bubble sheet can be performed by stacking a plurality of air bubble sheets, and in the case of a large number, 10 air bubbles can be performed, and an extremely efficient operation is realized. However, if the subsequent stacking cannot be performed smoothly, the high efficiency of the machining process cannot be enjoyed.

An object of the present invention is to smoothly stack flexible sheets, typically bubble sheets, avoiding the above-mentioned troubles, and to stack each sheet correctly at the same position, especially for a plurality of sheets. It is an object to provide a method for stacking sheet-like materials and an apparatus used for carrying out the method.

As shown in FIG. 1A, the method for stacking flexible sheet-like materials of the present invention is an endless belt type conveyor (4) that is held and driven by a pair of support rolls (3A, 3B) arranged in parallel. 1 or a plurality of sheet-like objects (2) are placed thereon, and as shown in FIG. 1B, the conveyor carrying the sheet-like objects is moved above the position to be stacked. As shown in C, the conveyor roll is driven by rotating the support roll, and at the same time, the axis (5A, 5B) of the support roll is moved in the direction opposite to the moving direction of the belt on the upper surface of the conveyor, and the drive speed (V ₁ ) With the moving speed (V ₂ ) matched, the conveyor (4) is extracted from below the sheet-like object (2) without changing the position of the sheet-like object as shown in FIG. Consisting of placing in place It is the law. In FIG. 1, a code | symbol (1) is a sheet-like thing stacked | stacked previously, the sheet-like object (2) being stacked on it.

In the stacking method of the present invention, as shown in detail in FIG. 2, the shafts (5A, 5B) of the support rolls (3A, 3B) are moved in the direction (Y) opposite to the driving direction (X) of the conveyor, Since the driving speed (V ₁ ) and the moving speed (V ₂ ) are made to coincide with each other, the conveyor (4) can be moved from the lower side of the sheet-like object (2) without causing a change in the position of the sheet-like object. Get out and stack. One sheet may be handled, or two or more sheets may be handled. By repeating the above operation, an arbitrary number of sheets can be stacked at a predetermined position. If the stacking is performed on another conveyor, the entire stacked sheet-like material can be carried to a bundling device or a packaging device.

An apparatus for stacking flexible sheet-like objects according to the present invention for carrying out the above-described stacking method is supported by a pair of rolls (3A, 3B) arranged in parallel and driven in one or both directions. The conveyor (4) of the mold and the conveyor itself (not shown) to be stacked and the position to be stacked (indicated by reference numeral (1) in FIG. 1) are arranged or stacked in advance. Moving means (also not shown) that reciprocates between the sheet and the sheet.

As described above, the support roll is rotated to drive the conveyor, and at the same time, the shaft (5A, 5B) of the support roll is moved in the direction opposite to the moving direction of the belt on the upper surface of the conveyor, and the driving speed (V ₁ ) and moving speed ( A combination of gears as shown in FIG. 3 is advantageous as a mechanism for realizing the operation of operating the conveyor (4) in a state in which V ₂ ) is matched and extracting from the lower side of the sheet-like object (2). . This mechanism consists of a horizontal rack (7) and a pinion (8) meshing with the rack (7), and a pinion that meshes with the pinion and is connected to the shaft of the support roll. Alternatively, the same type of gear, preferably the latter, is structured to rotate.

Here, the effective diameter of the pinion (8) and the gear (9) of the same type, that is, the distance from the shaft to the center of the surface on which the two gears contact and rotate is of course the same, it is also the support roll ( 3A, 3B) (more precisely, the diameter of the semicircle formed by the outer surface of the belt driven by the support roll). The shaft of the gear (9) of the same type as the pinion is directly connected to the shaft of the support roll (3A). By rotating this shaft, the belt supported by the two support rolls (3A, 3B) is driven. However, this rotational force is transmitted to the rack (7) via the pinion (8), and the pinion (8) and the same type of gear (9) maintain the relative positional relationship between the rack (7). Move horizontally up. As a result of such movement, the conveyor itself moves at the same speed (V ₂ ) as the speed at which the conveyor belt is driven (V ₁ ), and then comes out from under the sheet-like material placed thereon.

When the sheet-like material (2) placed on the conveyor (4) moves together with the conveyor to the position to be stacked, and when the conveyor is pulled out at that position, the sheet-like material is covered and the position is changed or blown away. There is a danger of being. This risk increases as the plastic film used as the material for the bubble sheet becomes thinner. In order to prevent this, it is preferable to provide a plate-like sheet pressing means (6) for pressing the sheet-like material from above and fixing it on the conveyor. Even if the pressing means is plate-shaped, it is necessary to form it in a mesh or punching metal shape so that an air flow is less likely to occur with the movement of the pressing means.

Another problem associated with the handling of sheet materials made of plastic such as a bubble sheet is static electricity generated in the sheet. Therefore, in order to solve this problem, it is recommended to place a grounded slow current bar to remove static electricity and touch the sheet. This object can be achieved by manufacturing the sheet-like material pressing means (6) with metal and always placing it in a grounded state.

As described above, the stacking technique of the present invention is often used in combination with sheet cutting and punching processes. Now, a case where long sheets are cut into a certain length and stacked will be described. The overall process is as follows. That is, a stack of a plurality of sheet-like materials is pulled out by sandwiching them with nip rolls from above and below, placed for a certain length on the conveyor of the apparatus of the present invention, and cut by a cutting device comprising an upper blade and a lower blade. Place the cut piece on the conveyor. If necessary, cut the cut piece with sheet holding means. Carrying this to a predetermined place and stacking it up to a predetermined number is as described above. The conveyor which has finished carrying the sheet-like material returns to the original position and waits for the next cut piece. The following is a repetition of the above. As described above, the stacked sheet-like material is transferred to a binding device or the like for binding and packaging.

BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram which shows the process of the method of stacking the flexible sheet-like material of this invention, Comprising: A is the stage which mounted the sheet-like material which should be stacked on a conveyor, B is the stacking position of the conveyor which mounted the sheet-like material C is a stage where the conveyor is driven to exit the conveyor from under the sheet-like material, and D is a stage where stacking of the sheet-like material is finished. The figure which shows the relationship between the drive direction and moving direction of a conveyor, and a driving speed and moving speed for demonstrating the principle of the method of this invention. In the apparatus of this invention, it is a figure which shows the mechanism for performing the drive and movement of a conveyor at the same speed in the opposite direction simultaneously, Comprising: A is a front view, B is a side view which abbreviate | omitted one part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet-like object put in advance 2 Sheet-like object 3A, 3B to be stacked Support roll 4 Conveyor 5A, 5B Support roll shaft 6 Sheet pressing means 7 Rack 8 Pinion 9 Gear of the same type as the pinion X Conveyor drive direction Y Conveyor moving speed movement direction V ₁ driving speed V ₂ of

Claims (5)

A method of stacking flexible sheet-like objects, one or a plurality of sheets on an endless belt type conveyor (4) supported and driven by a pair of support rolls (3A, 3B) arranged in parallel Place the sheet (2) and move the conveyor on which this sheet is placed above the position to be stacked, where the support roll is rotated to drive the conveyor, and at the same time the shaft (5A, 5B) of the support roll The belt is moved in the direction opposite to the belt movement direction on the upper surface of the conveyor, the conveyor driving speed (V ₁ ) and the moving speed (V ₂ ) are matched, and the conveyor (4) is extracted from below the sheet-like object (2). A method comprising placing a sheet-like object at a predetermined position without changing its position. An apparatus for stacking flexible sheet-like objects, and an endless belt type conveyor (4) supported and driven by a pair of support rolls (3A, 3B) arranged in parallel, and the conveyor itself should be stacked The apparatus comprised from the supply means of a sheet-like object (2), and the conveyor moving means to reciprocate between the stacking positions. The apparatus according to claim 2, further comprising sheet pressing means (6) for pressing the sheet-like material (2) on the conveyor (4) from above so that the sheet-like material is not blown off when being lowered from the conveyor. The apparatus of Claim 2 provided with the earthing | grounding slow current bar for removing the static electricity which generate | occur | produces in a sheet-like object. 3. The apparatus according to claim 2, wherein the sheet-like material is a plastic bubble sheet, and is used in an apparatus for obtaining a cut product or a punched product having a specific size and shape from a long or fixed length.

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