JP6827448B2 - Bulk palletizer and method for preventing sticking of separate sheets in bulk palletizer - Google Patents

Description

The present invention is a bulk palletizer including a sheet transporting unit for mounting a separate sheet transported from a large number of stacked separate sheets on a plurality of loaded containers, and a method for preventing sticking of the separate sheet in the bulk palletizer. Regarding.

Many containers such as glass bottles, PET bottles, and bottle cans are stacked on a pallet in each layer and shipped in a form called bulk. On the pallet, a separate sheet, which is a bulk sheet, and a large number of containers placed on the sheet are laminated in multiple layers. As a device for loading this container group on a pallet, a bulk palletizer having a sheet transporting unit on which a separate sheet transported from the sheet accommodating unit is placed is known.

When the separate sheets are sucked and lifted by the suction pad of the sheet transport unit, several separate sheets may stick to each other and be lifted together. Such a phenomenon often occurs in a new separate sheet having a high degree of adhesion between the separate sheets. When several separate sheets are lifted together, it is necessary to peel off the lower separate sheet with a sheet peeling device or the like.

Patent Document 1 describes a palletizer including a can body supply unit for arranging a plurality of can bodies on a pallet and a sheet supply unit for placing a separate sheet on the can body arranged on the pallet. .. The sheet supply section of the palletizer is provided with a sheet transport section for sucking and lifting the uppermost separate sheet with a suction pad to lift and transport the separate sheet, and a sheet stop holding section for contacting the corners of the separate sheet. The suction pad sucks the separate sheet inside the sheet holding portion to separate the uppermost separate sheet from the lower separate sheet.

Japanese Patent No. 5409300

In the palletizer of Patent Document 1, the seat holding portions are provided at the four corners, and when the uppermost separate sheet is lifted, the other separate sheets below the separate sheet behave as if the central portion bends upward. Take. Therefore, when a separate sheet having a thickness and size that is easily bent or a new separate sheet is used, it cannot be separated from the uppermost separate sheet, and a plurality of lower separate sheets are lifted together.

In some cases, 10 or more separate sheets will be lifted together, and the force applied to the arm supporting the suction pad will be excessive, causing damage to the arm. If the arm is damaged, there are problems such as labor for parts replacement, parts cost, and loss due to process stoppage.

In view of the problems of the prior art, the present invention is a bulk palletizer capable of reliably separating the uppermost separate sheet from the other separate sheets below the separate sheet regardless of the form of the separate sheet, and the separate sheet in the bulk palletizer. The purpose is to provide a sticking prevention method.

In the bulk palletizer of the present invention, a container transport section for loading a plurality of containers on a pallet and a rectangular separate sheet transported from the sheet storage section are placed on the plurality of containers loaded by the container transport section. to a bulk palletizer comprising a sheet conveying portion, the sheet conveying unit includes a four suction pads for sucking the respective corners near the separate sheet, in one of these four suction pads adsorption An advancing / retreating sheet that comes into contact with the upper surface of the uppermost separate sheet sucked by the lifting mechanism that raises and lowers only the pad and the one suction pad raised by this lifting mechanism, and separates the other separate sheets below it. The sheet pressing member has a pressing member, and the sheet pressing member has a surface of the separate sheet so as to abut on the upper surface of the uppermost rectangular separate sheet near the corner near the one suction pad. It is located on the edge side of the separate sheet of the one suction pad , which is outside the region surrounded by the four suction pads in the inward direction .

The bulk palletizer of the present invention, by the elevating mechanism of the sheet conveying portion, only one suction pads of the four suction pads for sucking the respective corners near the separate sheet is increased, it comes into contact with the upper surface of separate sheet advance The free seat holding member separates the uppermost separate sheet sucked by one suction pad raised by the elevating mechanism from the other separate seats below it.

In the present invention, instead of lifting the vicinity of all corners of the separate sheet, only one corner is lifted. Therefore, when the uppermost separate sheet is lifted, it is possible to prevent the other separate sheets on the lower side from bending upward with the central portion facing upward. Therefore, any form of the separate sheet can be reliably separated from the uppermost separate sheet.

A lifter mechanism for moving a large number of laminated separate sheets in the sheet accommodating portion upward as the number of laminated sheets decreases may be further provided. If the separate sheets are stuck to each other, the excess separate sheets are peeled off by the sheet peeling device at the stage of lifting. When the peeled separate sheet falls, the position of the sheet is disturbed, and the machine may stop in the next suction step. If the above lifter mechanism is provided, the falling distance can be reduced and the seat position can be prevented from being disturbed.

In the method for preventing the sticking of separate sheets in the bulk palletizer of the present invention, a plurality of containers are transported from the sheet accommodating section onto a container transport section for loading the plurality of containers on a pallet and a plurality of containers loaded by the container transport section. a separate sheet adsorption prevention method in the bulk palletizer comprising a sheet conveying portion for placing a rectangular separate sheet, the sheet conveying portion is four to adsorb each corner near the separate sheet The suction pad, the lifting mechanism that raises and lowers only one of these four suction pads, and the upper surface of the uppermost separate sheet that is sucked by the one suction pad raised by this lifting mechanism are brought into contact with each other. It has a seat holding member that can be moved back and forth to separate the other separate sheets on the lower side, and the seat holding member is a corner portion of the uppermost rectangular separate sheet near the one suction pad. It is located on the edge side of the separate sheet of the one suction pad , which is outside the area surrounded by the four suction pads in the in-plane direction of the separate sheet so as to abut on the upper surface of the vicinity, and is located at the most. The upper separate sheet is adsorbed by the four suction pads, and the suction and advance steps of advancing the sheet holding member and the elevating mechanism raise only the one suction pad to lift the uppermost separate sheet. It includes a separation step of separating the lower side from the other separate sheet.

When the method of the present invention is carried out, only one of the four suction pads that suck each of the vicinity of the corners of the separate sheet is raised by the elevating mechanism of the sheet transport section, and hits the upper surface of the separate sheet. The advancing / retreating seat holding member in contact separates the uppermost separate sheet sucked by one suction pad raised by the elevating mechanism from the other separate seats below it.

In the present invention, instead of lifting the vicinity of all corners of the separate sheet, only one corner is lifted. Therefore, when the uppermost separate sheet is lifted, it is possible to prevent the other separate sheets on the lower side from bending upward with the central portion facing upward. Therefore, any form of the separate sheet can be reliably separated from the uppermost separate sheet.

According to the present invention, when the uppermost separate sheet is lifted, it is possible to prevent the other lower separate sheet from bending upward with the central portion facing upward, so that the separate sheet can be prevented from bending. You can surely separate them from each other.

It is a side schematic side view of the bulk palletizer which concerns on one Embodiment of this invention. It is a side view of the main part of FIG. It is a perspective view for demonstrating the state which separate sheets are separated from each other. It is a side view of a main part after separating a separate sheet. It is a flowchart which shows the procedure of the sticking prevention method of a separate sheet. It is a side schematic diagram for demonstrating the lifter mechanism.

An embodiment of the present invention will be described. FIG. 1 is a schematic side view of a bulk palletizer according to an embodiment of the present invention, and FIG. 2 is a side view of a main part of FIG. The bulk palletizer 1 includes a container transport section (not shown) for loading a plurality of containers 100 on a pallet, and a rectangular separate sheet transported from the sheet accommodating section 2 onto the plurality of containers 100 loaded by the container transport section. It is provided with a sheet transport unit 3 on which S1 is placed.

The sheet transport unit 3 is a device that takes one separate sheet S1 from the uppermost stage of a large number of separate sheets laminated on the sheet accommodating unit 2 and repeatedly places the separate sheets S1 on a large number of containers 100 loaded on a pallet. It is configured. The sheet transport unit 3 adsorbs the sheet accommodating unit 2 accommodating a large number of separate sheets, the sheet checker 4 provided in the sheet accommodating unit 2 for detecting the number of lifted separate sheets S1, and the separate sheet S1. The suction mechanism 5 is mainly composed of a suction mechanism 5 and a seat lifter 11 for moving the suction mechanism 5.

As shown in FIG. 2, the suction mechanism 5 includes four suction pads 6 that suck the vicinity of the corners of the rectangular separate sheet S1, four arms 7 that support each suction pad 6, and four suction pads 6. Only one of them is provided with an elevating mechanism 8 for elevating and elevating the suction pad 6 in the vertical direction of FIG. A suction pad 6 is provided at the tip of each arm 7. The elevating mechanism 8 is installed on one of the four suction pads 6 (hereinafter, the operation pad 9). By this elevating mechanism 8, only the operating pad 9 moves in the vertical direction while the other three suction pads 6 are stopped.

As shown in FIG. 3, in a state where the separate sheet S1 is sucked by the four suction pads 6 including the working pad 9, only a part of the separate sheet S1 sucked by the working pad 9 is lifted. That is, only the portion corresponding to the operating pad 9 in the uppermost separate sheet S1 is in contact with the other separate sheet S2 on the lower side of the portion corresponding to the three suction pads 6 in the uppermost separate sheet S1. However, it tries to separate from the other separate sheets underneath.

As shown in FIGS. 2 and 3, in the vicinity of the operating pad 9 in the seat accommodating portion 2, the advancing / retreating seat holding member 10 that comes into contact with the upper surface of the separate sheet S1 is provided. In the present embodiment, the seat pressing member 10 is installed in the seat checker 4, but the seat pressing member 10 may be installed in any form. The seat pressing member 10 of the present embodiment has a shape in which a flat plate having a required length is bent into an L shape in a side view. As shown in FIG. 3, the upper surface of the corner of the uppermost separate sheet S1 is pressed by the pressing portion 10a of the sheet pressing member 10.

Due to the presence of the seat pressing member 10, the corner of the uppermost separate sheet S1 is pressed by the pressing portion 10a from above, and at the same time, only a part of the separate sheet S1 corresponding to the position of the operating pad 9 is lifted. As a result, a part of the separate sheet S1 lifted by the operating pad 9 tends to separate from the other separate sheet S2 on the lower side thereof, and the sheet pressing member 10 presses the corner of the separate sheet S1. Coupled with this, as shown in FIG. 4, only the uppermost separate sheet S1 is surely separated from the other separate sheet S2 on the lower side and separated.

The shape of the sheet pressing member 10 is not limited, and the shape of pressing the separate sheet S1 on a flat surface as in the present embodiment is more preferable. It is preferable that the position of the seat pressing member 10 is close to the operating pad 9 and is inside the corner side edge f of the operating pad 9 in the separate sheet S1 as shown in FIG. By providing the seat pressing member 10 at this position, even when the separate sheet S1 is lifted high by the operating pad 9, the corner portion S11 of the separate sheet S1 does not come off from the seat pressing member 10. As a result, both separate sheets S1 and S2 can be separated more reliably.

The configuration in which the seat pressing member 10 can be moved forward and backward is not limited, and the configuration is such that the seat pressing member 10 can be inserted and removed while keeping the orientation toward the position of the separate sheet S1, and the pressing portion 10a can be freely detached from the separate sheet S1. 3 It may be rotated in the direction of the arrow.

A method for preventing sticking of the separate sheet in the bulk palletizer 1 will be described with reference to the flowchart of FIG. In the following description, the separate sheet is called a sheet. At the start of sheet removal, the seat lifter 11 (see FIG. 1) is lowered, the seat lifter 11 is stopped at a predetermined position, and the four suction pads 6 including the operation pad 9 are located on the uppermost sheet S1. Sheet suction is performed by the operating pad 9 and other suction pads 6 (seat suction 15). At the same time, the seat holding member 10 advances to a position where the seat S1 can be pressed (seat pressing forward 16: forward step).

Next, the operation pad 9 rises to a predetermined position (operation pad rise 17). Here, the uppermost sheet S1 and the other lower sheet S2 are separated (separation step). After the seats S1 and S2 are separated from each other, the seat pressing member 10 retracts to a position where it does not interfere with the seat S1 (seat pressing retract 18), the seat lifter 11 rises, and the operating pad 9 descends to the original position.

Subsequently, when the sheet checker 4 is activated and it is detected that there is only one sheet S1, the sheet S1 is carried to the container 100 side by the sheet lifter 11. When it is detected that there are two or more sheets, a sheet peeling device (not shown) is activated to peel the sheet S2 from the sheet S1 and inspect again with the sheet checker 4. If it is detected that there is only one sheet, it is carried to the container 100 side.

That is, the following method for preventing sticking of the separate sheet can be implemented. This is a method for preventing adsorption of separate sheets in a bulk palletizer 1 including a container transport section for loading a plurality of containers 100 on a pallet and a sheet transport section 3 for mounting a separate sheet S1 transported from the sheet accommodating section 2. .. The sheet transport unit 3 uses a plurality of suction pads 6 for sucking the vicinity of the corners of the separate sheet S1, a lifting mechanism 8 for raising and lowering only one of the plurality of suction pads 6, and the lifting mechanism 8. It has a seat holding member 10 that can move forward and backward so as to come into contact with the upper surface of the uppermost separate sheet S1 attracted by the raised operating pad 9 and separate from the other separate sheet S2 below the separate sheet S1. Is sucked by a plurality of suction pads 6 and the seat holding member 10 is moved forward in a suction and forward step, and only the operating pad 9 is raised by the elevating mechanism 8 to separate the separate sheet S1 from the other separate sheets S2 below it. A method for preventing the sticking of separate sheets in a bulk palletizer, including a cutting step for making the sheet.

FIG. 6 is a schematic side view when the lifter mechanism 20 is provided in the seat accommodating portion 2. In this embodiment, the seat accommodating portion 2 is provided with a lifter mechanism 20 that moves a large number of stacked separate sheets in the sheet accommodating portion 2 upward as the number of laminated sheets decreases. When the uppermost separate sheet S1 and the other separate sheets S2 on the lower side are attached to each other, the excess separate sheet S2 is peeled off by the sheet peeling device at the stage of lifting. When the peeled separate sheet S2 falls, the sheet position is disturbed, and the machine may stop in the next suction step. If the lifter mechanism 20 is provided, the falling distance can be reduced and the seat position can be prevented from being disturbed.

By implementing the method for preventing the sticking of the separate sheet in the bulk palletizer described above, the abnormality of taking two sheets can be reduced at a rate of 98%, and accordingly, the arm 7 supporting the suction pad 6 is completely eliminated. It was.

In the bulk palletizer 1 and the method for preventing sticking of the separate sheet in the bulk palletizer of the present embodiment, only the operating pad 9 of the plurality of suction pads 6 that suck the vicinity of the corner of the separate sheet S1 by the elevating mechanism 8 rises. The advancing / retreating seat holding member 10 that comes into contact with the upper surface of the separate sheet S1 separates the separate sheet S1 that has been attracted by the operating pad 9 raised by the elevating mechanism 8 from the separate sheet S2 below the separate sheet S1.

In the present embodiment, instead of lifting the vicinity of all the corners of the separate sheet S1, only one corner is lifted. Therefore, when the separate sheet S1 is lifted, it is possible to prevent the other separate sheet S2 below the separate sheet S1 from bending upward with its central portion facing upward. Therefore, regardless of the form of the separate sheet, it can be reliably separated from the uppermost separate sheet S1. As a result, an excessive force is not applied to the arm 7 that supports the suction pad 6, damage to the arm 7 can be prevented, and there are no problems such as labor for parts replacement, parts cost, and loss due to process stoppage. ..

The bulk palletizer of the present embodiment and the method for preventing sticking of separate sheets in the bulk palletizer are examples and are not limited. In the above embodiment, one of the four suction pads is provided with an elevating mechanism, but two of the four suction pads diagonally provided with an elevating mechanism and these are operated pads. May be.

In this configuration, instead of lifting all the corners of the separate seat, only the two diagonal corners are lifted, and the seat holding members are installed at two locations corresponding to the operating pads. Even in this case, when the uppermost separate sheet is lifted, it is possible to prevent the other separate sheets on the lower side from bending upward with the central portion facing upward. Therefore, the separate sheets can be reliably separated from each other.

The shape, size, material, and various members constituting the sheet transport portion of the separate sheet are not limited. The seat accommodating portion, seat checker, suction pad, seat lifter, lifter mechanism, etc. for constituting the present invention can be changed as long as the effects of the present invention are not impaired, and other configurations and members provided as necessary can be changed. The form is not limited.

1 Bulk palletizer 2 Seat accommodating part 3 Seat transport part 4 Seat checker 5 Suction mechanism 6 Suction pad 7 Arm 8 Lifting mechanism 9 Operation pad 10 Seat holding member 11 Seat lifter 20 Lifter mechanism 100 Container S1, S2 Separate sheet S11 Separate sheet corner part

Claims (3)

A container transport section for loading a plurality of containers on a pallet and a sheet transport section for placing a rectangular separate sheet transported from the sheet accommodating section on the plurality of containers loaded by the container transport section are provided. It ’s a bulk palletizer,
Said sheet conveying section, and four suction pads for sucking the respective corners near the separate sheet, and the four lifting mechanism for lifting only one suction pads of the suction pad, increase in the lifting mechanism It has an advancing / retreating sheet holding member that abuts on the upper surface of the uppermost separate sheet adsorbed by the one adsorbed pad and separates the other separate sheets below the upper surface.
The sheet holding member is surrounded by the four suction pads in the in-plane direction of the separate sheet so as to abut on the upper surface of the uppermost rectangular separate sheet near the corner near the one suction pad. A bulk palletizer located on the edge side of the separate sheet of the one suction pad , which is outside the damaged region . The bulk palletizer according to claim 1, further comprising a lifter mechanism for moving a large number of laminated separate sheets in the sheet accommodating portion upward as the number of laminated sheets decreases. A container transport section for loading a plurality of containers on a pallet and a sheet transport section for placing a rectangular separate sheet transported from the sheet accommodating section on the plurality of containers loaded by the container transport section are provided. This is a method for preventing adsorption of separate sheets in bulk pallets.
Said sheet conveying section, and four suction pads for sucking the respective corners near the separate sheet, and the four lifting mechanism for lifting only one suction pads of the suction pad, increase in the lifting mechanism It has an advancing / retreating seat holding member that abuts on the upper surface of the uppermost separate sheet adsorbed by the one adsorbed pad and separates the other separate sheets below the upper surface.
The sheet holding member is surrounded by the four suction pads in the in-plane direction of the separate sheet so as to abut on the upper surface of the uppermost rectangular separate sheet near the corner near the one suction pad. It is located on the edge side of the separate sheet of the one suction pad , which is outside the damaged area .
The suction and advancing steps of adsorbing the uppermost separate sheet with the four suction pads and advancing the sheet holding member.
A method for preventing sticking of a separate sheet in a bulk palletizer, which comprises a separation step of raising only the one suction pad by the elevating mechanism to separate the uppermost separate sheet from another separate sheet below the suction pad.

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