JPS6056728A - Depalletizer - Google Patents

Abstract

PURPOSE:To alternately discharge an article on a pallet to a discharge conveyer by alternately feeding a plurality of pallets to a work position. CONSTITUTION:When an elevating frame 11 is lowered and stopped in such a manner that the upper surface of a delivery plate 12 mounted on the elevating frame is aligned with the base of articles 6 of the uppermost layer for a pallet 2 positioned at a work position C, the articles 6 of the uppermost layer are positioned in the inner space of a moving frame 13. A detach machanism 15 of a partition plate 7 is operated to bring a negative pressure absorbing mechanism 16 adjacent to a partition plate 7 on the articles 6 of the uppermost layer, and the partition plate 7 is adsorbed and retained by negative pressure of the adsorbing mechanism 16 to be conveyed to a stock portion. A rear push-out member 20 and a front support member 21 are lowered to support the articles 6 at the front and rear thereof, and a moving frame 13 is advance by a chain so that the articles 6 on the uppermost layer 6 are transferred from the partition plate 7 to the delivery plate 12 mounted on the elevating frame 11 to be discharged onto a discharge conveyer 8.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a depalletizer that sequentially transports articles stacked on a pallet one layer at a time starting from the top layer.

Conventionally, when it is necessary to supply different types of items to a processing line that processes items carried out from a depalletizer, a pallet with the same type of items placed thereon is usually fed to the depalletizer, and the items are loaded onto the pallet. Once it is completely drained,
Next, a pallet on which different types of articles are placed is supplied, and the different types of articles are supplied to the processing line.

However, since many items of the same type are normally placed on a pallet, if it is necessary to supply small amounts of different types of items to a processing line, a depalletizer is prepared for each type of item and each item is placed on a pallet. It was necessary to operate the retizer alternately, or to place different types of items on the pallet in advance in the required order on each tier, and to supply different types of articles from each tier to the processing line.

However, it is not practical to prepare depalletizers for each product type because the equipment costs are extremely high.
Furthermore, it is troublesome to place different articles on a pallet, the articles may become unstable, and there are other drawbacks such as the inability to immediately respond to changes in processing line requirements.

In view of these circumstances, the present invention is designed to prepare a plurality of pallets using one depalletizer, and to allow articles to be carried out alternately from each node. The object of the present invention is to provide a depalletizer that can supply different types of articles in small quantities to a processing line even if they are placed on the depalletizer.

To explain the uninvented aspects of the illustrated embodiment below, FIG.
In Fig. 2, ■ is a pallet conveyor that intermittently transports pallets 2 at a low position close to the floor, and 3 is a turret table placed in front of this pallet conveyor 1. Pantograph type lifters 4 for raising and lowering the balent 2 are provided at four equally spaced positions around the periphery.

The turret table 3 is intermittently rotated by 80 degrees by a drive device (not shown), and at the same time one lid 4 is positioned at a pallet supply position A opposite to the pallet conveyor 1 indicated in -1-. , the lifter 4
The lifters 4, which are out of phase by 90 degrees in the rotational direction, are sequentially positioned at the 1st standby position B, the work position C1 for carrying out articles from lifter 4-1- (barret) and 2, and the second standby position. We are making it possible to do so. In this embodiment, the pallet discharge position where the pallet 2 is discharged from the flap 4-hi is made to coincide with the above-mentioned working position C, and a pallet discharge conveyor 5 which discharges the pallet 2 is provided opposite to the working position C. .

A large number of articles 6 such as containers are placed on each of the pallets 2.
! A partition plate 7 is placed on the first layer of articles 6, and a second layer of articles 6 is placed on this partition plate 7, and the same process is carried out thereafter. A plurality of layers of articles 6 are placed on the pallet 2. The same kind of articles 6 are placed on each pallet 2, but since a plurality of pallets 2 can be placed on the turret table 3'', the articles 6 between each pallet sheet 2 are Can be of different types.

In each lifter 4, at its upper end position, the bottom surface of the lowest article 6 on the pallet 2 is at the same height as the second surface of the discharge conveyor 8 from which the article 6 is discharged. It is made to be at the same height as the upper surface of the pallet discharge conveyor 5. A clamper 9 is provided at the tip of each lifter 4, and the pallet 2 can be fixed to the lifter 4 by the clamper 9.

Therefore, by the elevating mechanism 10 having an appropriate configuration, the elevating mechanism 10 may be located at the working position C or may be located at one of the -1 positions of the 7-ta 4.
2 rising end position above the article 6 in the most-1st layer, and υ1
An elevating frame 11 is provided which is raised and lowered between a lower end position corresponding to the height position of the output conveyor 8.

Then, onto this '71 descending frame 11, the uppermost article 6 on the pallet 2 is pushed onto the spanning plate 12 provided on the lifting frame 11, and then the article 6 is transferred from the spanning plate 12'' to the discharge conveyor 8. - A moving frame 13 is provided for pushing out.

In addition, the machine frame 14 is provided with a removal mechanism 15 for the partition plate 7 that can be raised and lowered and rotated, and a negative pressure suction mechanism 16 provided at the tip of the removal mechanism 15 suctions and holds the partition plate 7 in the lateral stock portion E. I am trying to be able to eliminate it.

The movable frame 13 is reciprocated on the elevating frame II by rollers (not shown) provided thereon and guide rails provided on the elevating frame I+, and sprockets provided at both ends of the elevating frame 11) 17.17 A chino 18 which is hung over is connected to the movable frame 13. The movable frame 13 can be reciprocated with respect to the elevating frame 11 by reciprocating the chino 18 by the motor 18.

The moving frame 13 is constituted by a rectangular frame body, and has an internal space in which the articles 6 on the bar 1/lot 2 can be relatively raised and lowered. An extrusion member 20 is provided on the rear side in the extrusion direction to abut against and extrude the article 6, and an extrusion member 20 is provided on the front side.
A support member 2 that supports and guides the article 6 extruded by the
1 is provided. The extrusion member 20 and the support member 21 are rotatable about their respective bases, and are moved to a lower contact position where they can come into contact with the article 6 and an upper retracted position where they do not come into contact with the article 6. I'm trying to do that. This structure is basically the same as that of a conventionally known elevated floor depalletizer.

In the above configuration, in the initial state, the elevating frame 11 is located at the ascending end, the moving frame 13 is located at the retreating end on the right side in FIG.
0 and the front support member 21 are each located at the retracted position of 1 nica. On the other hand, each lifter 41-. of the turret table 3. Pallets 2 carrying different types of articles 6 are introduced into the pallets 2 and fixed by clampers 9, and each lifter 4 is located at its lower end.

In this state, the lifting frame 11 is lowered with respect to the pallet 2 located at the working position C, so that the upper surface of the spanning plate 12 provided on the lifting frame 11 is at a height that corresponds to the bottom surface of the top layer article 6. When stopped, the top layer article 6 will be located within the internal space of the moving frame 13. Then, the removal mechanism 15 for the partition plate 7 is activated to bring the negative pressure suction mechanism 16 close to the partition plate 7 on the topmost layer of articles 6, and when the negative pressure of the suction mechanism 16 suctions and holds the partition plate 7, The suction mechanism 18 is raised and rotated by the removal mechanism 15 to convey and stock the partition plate 7 to a predetermined storage section E, and then returned to its original position.

When the partition plate 7 is removed by the removal mechanism 15, the rear extrusion member 20 and the front support member 21 are lowered to support the article 6 from the front and back, and in this state, the moving frame 13 is moved forward by the chino 18. As a result, the uppermost article 6 is conveyed from the partition plate 7 to the spanning plate 12 provided on the elevator frame 11.

The extrusion member 20 pushes all the articles 6 in the top layer onto the spanning board 1.
2, the forward movement of the movable frame 13 is stopped, and then the elevating frame 11 is moved so that the surface of the span plate 12 is on the side of the discharge conveyor 8.
It descends to a height that matches the surface and stops. As a result, the moving frame 13 starts moving forward again, and the span plate 12-1-
The articles 6 are then discharged onto the discharge conveyor 8J-. At this time, when the leading part of the article 6 is moved onto the discharge conveyor 8 and is conveyed by the discharge conveyor 8, it becomes unnecessary to support the article 6 by the front support member 21. It will now be lifted to the upper evacuation position. Then, all the articles 6 are transferred to the discharge conveyor 8.
When moved upward, the push-out member 2-0 is moved in the -L direction, after which the elevating frame 11 is raised and the movable frame 13 is returned to its original position.

After carrying out the top layer of articles 6 on the pallet 2 as described above, the turret table 3 is then rotated 80 degrees, and the pallet 2 located at the first standby position B is introduced into the working position C, and then In the same manner as above, the 41st layer of articles 6 on the pallet 2 is carried out. In this embodiment, the uppermost articles 6 of the four pallets 2 of the turret table 3-F are subsequently carried out alternately one layer at a time, so even if the same articles are placed on each pallet z, By making the types of articles different between each pallet 2, it becomes possible to supply smaller quantities of different types of articles one by one to the processing line on the downstream side.

Furthermore, when the articles 6 on each pallet 2 are carried out sequentially from the top layer as described above, and a predetermined layer of articles 6 remains on each pallet 2, the articles 6 on the predetermined layer are 6, the bottom surface of the span plate 12 and the discharge conveyor 8
Since the top surface of the moving frame 13 is substantially flush with the upper surface of the moving frame 13, the moving frame 13 continuously transfers the articles 6 on the partition plate 7 onto the carry-out conveyor 8 via the spanning plate 12.

Then, the node 2 that has been moved from the working position C to the next second waiting position i1D after the unloading of the articles 6 of that layer is completed,
It is lifted by the height of one layer by the lifter 4, then rotated once and again supplied to the working position C, and when the top layer article is continuously carried out as described above, it is similarly placed at the second standby position. The lifter 4 will now lift it up by one layer. When the articles 6 have been completely unloaded from all the pallets 2, the lifter 4 is positioned at the lower end and the clamper 9 is opened, and the empty noglets 2 on the lifter 4 are discharged to the outside by the pallet discharge conveyor 5. Ru. Then, when all the glue lids 4 are empty, the elevator frame 11 and the moving frame 1
3 returns to its original operating position, a new pallet 2 is introduced to each lifter 4-1-, and the above-described operation is repeated.

Note that - in the above embodiment, the turret table 3 is used as a pallet/sheet feeding device for alternately feeding a plurality of pallets 2 to the working position C; however, the turret table 3 is not limited to this; Palette 2 on the trajectory
Any appropriate means can be used, such as a conveyance conveyor that conveys the pallets 2 or a reciprocating mechanism that integrally reciprocates the plurality of pallets 2.

In addition, for the operation of the depalletizer, it is desirable to carry out articles alternately from each pallet 2 one stage at a time or the same number of stages at a time. For example, the articles on two of the four pallets 2 above may be of the same type.

However, it is not necessarily limited to this,
It is also possible to make the number of stages for transporting articles from a particular pallet different from the number of stages for transporting articles from other pallets.

As described below, the present invention is provided with a pallet supply device that alternately supplies a plurality of pallets to the above-mentioned working position, and the articles on the plurality of pallets are alternately discharged to a discharge conveyor. Even if the same type of items are loaded on each pallet, if the items on each pallet are different, it becomes possible to supply different types of items to the processing line in small quantities, which reduces equipment costs. This has the advantage that it can be made cheaper and requires less space for installation.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
FIG. 2...Pallet]・6...Goods

Claims (1)

[Claims] A depalletizer that feeds pallets stacked with articles to a predetermined working position, and at that working position sequentially transports the articles on the pallets from the top layer to a discharge conveyor, alternately supplies multiple pallets to the working position. 1. A depalletizer, comprising a pallet feeding device and alternately discharging articles from a plurality of pallets onto a discharging conveyor.