JP3469933B2 - Sheet removal device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reliably secures a plastic bag used in a supermarket or the like.
The present invention relates to a device for taking out sheets that can be taken out one by one.

[0002]

2. Description of the Related Art In supermarkets and the like, thin plastic sheet packaging bags are used to bring back products purchased by customers. These packaging bags are usually stacked near the checkout counter, and the cashier's clerk gives the customer the required number of sheets, carries it with the product purchased by the customer to the packaging table, and opens the packaging bag himself. Or the packaging bag taken out by the cashier's clerk is opened and the paid product is packaged and given to the customer.

[0003]

In the packaging bag, since the plastic sheets of the material are charged with static electricity or are in close contact with each other during storage, when the uppermost one is taken up, the lower one is put together. There is a problem that it takes a lot of time to take them out one by one.

In order to solve this problem, it is known that the supply of the packaging bag is automated, but in these devices, when the layered packaging bags are mechanically taken out one by one, the next packaging bag is reached. Since they were carried at the same time, the packaging bag was caught in the device, and the breakdown was constant.

In view of these problems, the present invention makes it possible to easily take out the packaging bags one by one, and the packaging bags are surely delivered one by one even when used in an automated packaging bag delivery device. An object of the present invention is to provide an extremely simplified device capable of preventing the device from being damaged due to the winding of the packaging bag.

[0006]

According to another aspect of the present invention, there is provided a device for taking out sheets according to the present invention, which is a device for taking out a large number of plastic sheets stacked on a mounting table, in which the rear end portion in the sheet taking-out direction is folded back upward. And the front end is left over and folded, and the lifting plate that descends by its own weight on the upper surface of this folded part
Therefore, a constant pressing force is always applied from above to set on the mounting table.

In the packaging bag feeding apparatus of the present invention, a vertically movable vertical plate is provided upright at the front end portion of the folded portion of the folded sheets.

In the apparatus for taking out sheets according to the present invention, the lower end of the vertical plate which comes into contact with the sheets is made of a material having extremely low friction.

The sheet take-out device of the present invention is as described above.
The vertical plate is self-weighted to the lift plate independently of the lift plate.
It is attached to descend at .

[0010]

When the sheets are set on the mounting table so as to form the folded portion of the sheets, the sheets are displaced from each other, so that the adhesion of the sheets is eliminated first. Furthermore, the sheet is taken out and thinned at the folded part of this sheet.
Even if the lift plate descends due to its own weight,
A constant pressing force is constantly applied, and a predetermined frictional force F = μT is applied between the sheets. Here, the coefficient of friction μ between the sheets is constant, but as the folded layered sheet is located inside, the drag force T is not generated on the sheet. This is because the outside of the layer of plastic sheets supports the pressing force by its own elastic force.

Therefore, the frictional resistance F generated on the innermost side
Is the smallest, and can be taken out one by one from the inside, that is, the uppermost sheet.

If a vertically movable vertical plate is erected at the front end of the folded portion of the sheets, the sheet layers placed as one lump are prevented from moving forward by the vertical plate at the front end. Therefore, it is possible to effectively prevent a situation in which a plurality of sheets can be taken out at the same time.

If the lower end of the vertical plate is made of a low friction material, the uppermost sheet can be taken out smoothly.

Since the vertical plate also descends due to its own weight, it can be kept in contact with the seat at all times.

[0015]

EXAMPLES Examples of the present invention will be described below.
Reference numeral 1 denotes a supply box for automatically supplying a packaging bag, and a packaging bag supply port 2 is opened at the left end of the drawing. Also,
In the supply box 1, a supply device for a packaging bag that carries the packaging bag to the supply port 2 is installed. Reference numeral 9 is a receiving plate extending outside the supply port 2.

As shown in FIGS. 1 and 2, this packaging bag feeder has a carrier chain 5 that rotates in an endless track by the rotational power of a drive sprocket 4 driven by a motor 3 and each guide sprocket 6. is doing.

A large number of carrier pieces 7 are further installed in a grid pattern between these carrier chains 5 so as to follow the carrier chains 5. A holding member 8 is fixed on each of the transport pieces 7 at a predetermined position.

At least the outer surface of the holding member 8 is made of a soft elastic material such as rubber or resin, and when it comes into contact with plastic sheets, a friction force higher than that between the plastic sheets is exerted. It is the material to obtain. For example, a silicon-based material is preferable.

Reference numeral 11 denotes a packaging bag made of plastic sheets, and a state in which a plurality of packaging bags are stacked on the mounting table 12 is shown. A side plate 13 is fixed to one side surface of the mounting table 12, and an elevating plate 14 is guided to the side plate 13 by a vertical groove 16 via a guide tool 10 so as to be vertically movable. Reference numeral 15 is a vertical plate that is guided up and down by the elevating plate 14.

The leading end of the stacked bundle of packaging bags 11 is placed on a pallet 17, and the pallet 17
The piston cylinder 18 is controlled by a controller (not shown) so that it can be moved up and down in a timely manner.

A workbench 19 functions as a conveying surface for the packaging bag 11, and an opening 20 is formed at a substantially central portion thereof. The friction member 21 looking through the opening 20 from below is
The piston cylinder 22 controlled by a controller (not shown) ascends, penetrates the opening 20, and is exposed upward. The worktable 19 and the upper surface of the pallet 17 are made of a low friction material having an extremely low coefficient of friction with respect to the plastic bag 11 made of plastic sheet.
At least the upper surface of the friction member 21 is made of a material that gives a relatively high frictional force to the packaging bag 11 made of a plastic sheet. This material is also preferably a silicon-based material.

The operation of the above-described packaging bag supply device will be described with reference to FIGS. Although not shown, the controller is a motor 3 for rotating the transport chain 5, a piston cylinder 2
2. The piston cylinder 18 is supplied from the supply port 2 to the packaging bag 1
1 is detected, or the buttons attached to the outside of the supply box 1 are pressed to operate in tandem, sending the next packaging bag 11 to the supply port 2, and issuing the next command. Is programmed to shut down.
Of course, the holding member 8 on the endless track prepares the next packaging bag 11 on the work table 19 and stands by even if it is in a stopped state. By using such an endless track, the next packaging bag can be supplied to the supply port 2 in a short time.

As shown in FIG. 3, the drive sprocket 4,
The guide sprocket 6 and the transport chain 5 start driving, and the holding member 8 faces downward at the delivery position and approaches the upper portion of the packaging bag 11. At this point, as shown in the drawing, the piston cylinder 18 starts to rise, and the packaging bag 11
When the uppermost surface of the sheet is brought into contact with or pressed by the holding member 8, the single uppermost packaging bag 11 is conveyed to the left side of the drawing by the holding member 8. Next, the rear holding member 8 also comes into contact with the rear portion of the packaging bag 11, and the packaging bag 11 is reliably transported to the work table 19. At this point, as shown in FIG. Pallet 17
To drop.

This is because the frictional force between the holding member 8 and the packaging bag 11 is larger than the frictional force between the packaging bags 11 as described above, and the packaging bag 11 is on the workbench 19 having a small friction coefficient. Is transported smoothly. Then, when this one packaging bag 11 reaches a predetermined position, the next piston cylinder 22 starts to rise, and the friction member 21 having a relatively high friction coefficient is brought into contact with or pressed against the lower surface of the packaging bag 11. As a result, relative displacement occurs on the upper and lower surfaces of the packaging bag 11, and the upper and lower surfaces of the packaging bag 11 are separated.

After that, the piston cylinder 22 descends at a predetermined timing, and the packaging bag 11 is conveyed to the supply port 2 by the holding member 8. In this series of work steps, the packaging bag 11
Since the upper and lower surfaces thereof are displaced, that is, peeled off, the packaging bag 11 supplied to the supply port 2 in this state is in an extremely easy-to-open state. Therefore, the customer does not need time to open the packaging bag.

Here, the device for taking out the packaging bag 11 which is a sheet will be described in more detail. The packaging bag 11 is set on the mounting table 12 with its rear end portion bent, and the upper surface of the folded portion is raised and lowered. It is constantly pressed by the plate 14. The lifting plate 14 is designed to descend along the vertical groove 16 by its own weight.
A vertical plate 15 is inserted into the unit 4 and descends independently of the lift plate 14. Reference numeral 23 denotes a retaining cap for the vertical plate 15, and the lowermost end of the vertical plate 15 is a low friction material 31.
Is formed by.

In this way, the packaging bag 11 formed with the folded portion of the sheet and set on the mounting table is the packaging bag 1.
Since there is a deviation in each of them, the close contact of the packaging bag 11 is canceled to some extent at first. Further, a pressing force is applied to the folded portion of the packaging bag 11 from the upper surface, and a predetermined frictional force F = μT is applied between the packaging bags.

Here, the coefficient of friction μ between the packaging bags 11 is constant, but the closer the folded layered packaging bag 11 is to the inside, the less the drag force T is generated in the packaging bag. This is because the right side of the packaging bag layer in FIG. 5, that is, the outside of the layer of plastic sheets supports the pressing force by its own elastic force.

Therefore, B and B'regions are more than A and A'regions of the folded portion, and C and C'are more than B and B'regions.
It means that the drag force T between the packaging bags 11 is not applied to the region, the frictional resistance F generated at the innermost side is the smallest, and the innermost side, that is, the uppermost packaging bag 11 is the most easily taken out state. .

Further, in this embodiment, since the vertical plate 15 which can be raised and lowered is erected at the front end of the folded back portion of the packaging bag 11, the layers of the packaging bag 11 placed as one lump are at this front end. Since the vertical plate 15 blocks the forward movement, a situation in which a plurality of packaging bags are pulled out at the same time is effectively prevented. Further, since the lower end of the vertical plate 15 is a low friction material, the uppermost packaging bag 11 can be taken out smoothly.

Since the elevating plate 14 is lowered by its own weight, the pressing force applied to the packaging bag 11 is always constant, and the vertical plate 15 is also lowered by its own weight, so that the packaging bag 11 as shown in FIG. Is taken out and becomes thin, the above conditions do not change.

FIG. 7 shows another embodiment of FIG. 3, and shows a packaging bag 11 placed on a pallet 17 as a placing table in the same manner as described above. The difference between this embodiment and the above-mentioned embodiments is that a variable weight 30 is placed on the elevating plate 14 and that a feed roller 25 is provided.

Since the packaging bag 11 has various thicknesses and the like, and the layers to be set have various thicknesses,
It is more effective to change the pressing force applied. Therefore, if the variable weights 30 are appropriately selected and placed on the lift plate 14, the packaging bags 11 can be taken out smoothly.

The feed roller 25 is rotating at a fixed position, and when the piston cylinder 18 is raised and the uppermost surface of the packaging bag 11 is brought into contact with or pressed against the feed roller 25, the feeding roller 25 and the holding member 8 coming in Together, the packaging bag 11 can be delivered more reliably.

Unlike the above-described two embodiments, FIG. 8 shows not an automated packaging bag feeding device but a device by which a store clerk or a customer can take out the packaging bags one by one using fingers of the hand. This is an example in which the present invention is used as the simplest supply device.

Reference numeral 1 is a supply box for the packaging bag 11, and the upper lid 27 can be opened with the hinge 26 as a fulcrum. To load the bundle of packaging bags 11, this upper lid 27
And the lifting plate 14 is lifted, and the bundle of packaging bags 11 whose rear end portion is folded back is set on the mounting table 28 in advance.
Close the upper lid 27.

When a store clerk or a customer takes out the packaging bag 11, the fingers 29 are pressed against the uppermost packaging bag 11 and pulled out, so that one by one can be surely taken out as in the above-mentioned embodiment.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention, the present invention is not limited thereto. Included in the invention.

[0039]

According to the present invention, since the individual packaging bags can be easily and reliably taken out, when the customer tries to put the product in the packaging bag, the packaging work time can be shortened and the packaging table It is possible to reduce the surrounding congestion. Further, when the unloading of the packaging bag is automated, the packaging bags are surely sent one by one to the transport portion, so that the situation in which the packaging bag is mechanically caught is reduced and the failure rate can be reduced.

[0040]

[Brief description of drawings]

FIG. 1 is a system conceptual diagram of a packaging bag supply device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a delivery position of FIG.

FIG. 3 is a cross-sectional view illustrating an operating state in FIG.

FIG. 4 is a cross-sectional view illustrating an operating state in FIG.

FIG. 5 is a plan view for explaining the operating state of the take-out portion in FIG. 3 in more detail.

FIG. 6 is a cross-sectional view for explaining the operating state of the take-out portion in FIG. 3 in more detail.

FIG. 7 is a cross-sectional view illustrating an operating state of another embodiment.

FIG. 8 is a sectional view of still another embodiment.

[Explanation of symbols]

1 Supply Box 2 Supply Port 3 Motor 4 Drive Sprocket 5 Conveyor Chain 6 Guide Sprocket 7 Conveying Piece 8 Holding Member 9 Receiving Plate 10 Guide Tool 11 Packaging Bag 12 Placement Table 13 Side Plate 14 Elevating Plate 15 Vertical Plate 16 Vertical Groove 17 Pallet 18 Piston Cylinder 19 Working table 20 Opening 21 Friction member 22 Piston cylinder 23 Locking cap 24 Opening 25 Feed roller 26 Hinge 27 Upper lid 28 Mounting table 29 Finger 30 Weight 31 Low friction material

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Claims (4)

(57) [Claims] 1. In a device for taking out a large number of plastic sheets stacked on a mounting table, the rear end portion in the sheet take-out direction is folded back upward and the front end portion is folded over, and the folded portion is formed. On the upper surface of the
A device for taking out sheets, which is set on a mounting table such that a constant pressing force is constantly applied from above by a plate . 2. The device for taking out sheets according to claim 1, wherein a vertically movable vertical plate is provided upright at a front end portion of a folded-back portion of the folded sheets. 3. The sheet take-out device according to claim 2, wherein the lower end of the vertical plate that comes into contact with the sheet is made of a material having extremely low friction. 4. The vertical plate is adapted to move up and down on the lifting plate.
請 which the plate is attached to drop by its own weight independently
The sheet takeout device according to claim 2 or 3 .