JPH06255870A - Device and method for loading corrugated board - Google Patents

Abstract

PURPOSE:To load a sheet of the preceding lot carried out so that a sheet of the next lot can be loaded in a time corresponding to a separating distance mutually between the lots even when one lot amount is very small number of sheets by arranging a pallet carrying-in conveyer and a corrugated board carrying-out conveyer in both sides of a stacker. CONSTITUTION:A corrugated board sheet A, worked into a specific size and shape from a continuous sheet in accordance with an order, is conveyed to a down stacker 6 by a conveyer. When the corrugated board sheet A is piled up on a pallet 8, the down stacker 6 is lowered down and placed in a level equal to carry-in/out conveyers 9, 10, and when the stacker 6 is further lowered down, both the conveyers 9, 10 are follow-up lowered down and stopped when reaching a specific position. Next, each roller conveyer 11 is turned to move the pallet 8 on the stacker 6 to a side of the carrying-out conveyer 10 and the pallet 8 on the carrying-in conveyer 9 onto the stacker 6. Then, each part is reset to the original position and returned to a desired condition.

Description

Detailed Description of the Invention

The present invention relates to a corrugated board sheet stacking apparatus and a corrugated board sheet stacking method for stacking a predetermined number of corrugated board sheets processed from a continuous sheet into a predetermined size and shape according to an order in a corrugated board manufacturing machine and carrying them out to a stock field or the like. .

[0002]

2. Description of the Related Art For example, the final stage of a corrugated board manufacturing machine is
As shown in FIGS. 10 to 12, the sandwich conveyor 1, the separating conveyors 2, 3 and 4, and the feeding conveyor 5
The down stacker 6, the carry-in conveyor 9, the carry-out conveyor 10 and the telescopic conveyor 21.

A corrugated cardboard sheet A on which a desired slitter / slotter process is applied after a liner paper is attached to a corrugated corrugated core paper to produce a continuous sheet is sandwiched as shown in FIGS. 10 and 11. The corrugated board sheet A is conveyed from the conveyor to the feed-out conveyor 5 via the separating conveyors 2 to 4, and the corrugated cardboard sheets A which are preceded and succeeded by a predetermined number by controlling the conveying speed at the time of conveying the separating portions by the separating conveyors 2 to 4. The parts are overlapped with each other in a so-called roofing shape, so that the corrugated cardboard sheets A can be neatly and easily stacked from the feeding conveyor 5 to the pallet 8 on the down stacker 6 of the stacker section.

In the down stacker 6, as shown in FIG. 12, the corrugated cardboard sheet A is fed from the conveyor 5 to the pallet 8.
As it is extruded onto and loaded, it descends sequentially from the state shown by the chain double-dashed line. When a predetermined number of corrugated cardboard sheets A are stacked on the pallet 8 as shown by the solid line, the pallet 8 is unloaded to the side from the down stacker 6 by the roller conveyor incorporated in the down stacker 6, and is further unloaded. After 10 minutes, it is transported to a stockyard or the like. An empty pallet 8 is supplied by the carry-in conveyor 9 on the down stacker 6 for stacking the next corrugated board sheet A, and then the pallet 8 is loaded to a position where the next lot (predetermined number) of corrugated board sheets A can be stacked. The down stacker 6 rises.

When the corrugated cardboard sheets A for one lot are stacked, the pallet 8 on which the corrugated cardboard sheets A for that lot are stacked is carried out to a stock place, and the next empty pallet 8 is placed on the down stacker 6. Put in. Further, while the down stacker 6 can be set up until it rises to a predetermined height position, the telescopic conveyor 21 moves the feeding conveyor 5
A part of the corrugated cardboard sheet A for the next lot, which is loaded from the feeding conveyor 5, is temporarily received, facing the input end of.

After the down stacker 6 has risen to a predetermined height, the corrugated board sheet A of the telescopic conveyor 21 is passed to the down stacker 6, and the telescopic conveyor 21 retracts from the feeding end of the feeding conveyor 5, and thereafter As described above, the cardboard sheets A are loaded from the feeding conveyor 5 to the down stacker 6, and the down stacker 6 descends as the cardboard sheets A are stacked on the pallet 8.

[0007]

In recent years, products have been diversified in response to the needs of consumers, and along with this, various types of cardboard cases for storing products have been produced. Therefore, the number of corrugated cardboard sheets A having a predetermined length that is cut from the continuous sheet is reduced in manufacturing the corrugated cardboard case, and as a result, the number of sheets that can be stacked on the pallet 8 on the down stacker 6 at a time is very small, such as several tens. In some cases.

On the other hand, the down stacker 6 has a carry-in conveyor 9 and a carry-out conveyor 10 for loading and unloading pallets installed on the floor, so that the pallet 8 is loaded and unloaded unless it is lowered to the lowest floor position. Can't do. Therefore, when the number of sheets for one lot is small due to the order change, the down stacker 6 finishes stacking the corrugated cardboard sheets A at a position H which is considerably above, and the down stacker 6 carries out the pallet 8 from the position at this end. It takes a lot of time to descend to the bottom for entry and a lot of time for order changes.

Then, a predetermined amount (maximum, for example, about 1800 m)
In order to stack the cardboard sheets A of m), a certain height is inevitable. In order to obtain a constant height H in this way, the separating conveyors 2 to 4 of the separating portion K need to have a constant inclination. Furthermore, if the separating conveyor 2 is shortened, it becomes difficult to separate the corrugated board sheet A. As an example of this separating means, there is a conveyor device disclosed in Japanese Patent Publication No. 60-54217.

Further, it is not preferable to reduce the production speed of the corrugated board sheet in the corrugated board manufacturing machine every time the order is changed as described above, because it is not preferable because the productivity is lowered. The cardboard sheet A is partially received.

However, if the number of sheets for one lot is extremely small as described above, the time required for order change is long and the amount of the corrugated board sheet A that is temporarily received by the telescopic conveyor 21 is large. A situation occurs in which it becomes impossible to accept.
In addition, the corrugated cardboard sheet A formed by the above separating conveyors 2 to 4
For example, reduce the transport speed of each lot, or increase the distance between lots (that is, the time) by using a sheet stopper.
There is a problem in that even if the operation is performed after the corrugated board manufacturing machine, the long-term order change cannot be sufficiently dealt with.

In view of the above circumstances, the present invention loads the sheets for the previous lot within the time corresponding to the separation distance between the lots even if the number of sheets for one lot is extremely small. Ready to load the next lot, and improve workability.
It is an object of the present invention to provide a corrugated board sheet stacking apparatus and a corrugated board sheet stacking method that can save space and keep the height of the entire apparatus low.

[0013]

In order to achieve the above-mentioned object, in the present invention, a stacker in which a corrugated sheet is received from a sheet conveying conveyor and sequentially descends as it is loaded and a loading / unloading conveyor is provided on the upper surface of the stacker. And a carry-in conveyor for pallet supply which is located on the lower side of both sides of the stacker and follows the descending of the stacker, and a carry-out conveyor for transferring the loaded corrugated board sheets.

Further, a sheet stacking step of stacking corrugated cardboard sheets stacked and conveyed in the shape of a roof tile on the stacker, a stacker lowering step of lowering the stacker according to the sequential stacking of corrugated cardboard sheets, and a stacker from a predetermined position. Following the descending process, the adjoining carry-in conveyor and carry-out conveyor descend, and when the stacker with a predetermined number of cardboard sheets is stopped, the stacked cardboard sheets are transferred to the carry-out conveyor and at the same time the pallet is carried from the carry-in conveyor to the stacker. Cardboard sheet loading method including a loading / unloading step, a returning step of raising the stacker, the unloading conveyor, and the loading conveyor to the original position and an unloading step of the cardboard sheet loaded from the unloading conveyor that has returned to the original position. It is in.

[0015]

In the corrugated board manufacturing machine, the corrugated board sheet A processed from a continuous sheet into a predetermined size and shape according to the order is conveyed to the feeding conveyor 5 by the sandwich conveyor 1, the separating conveyors 2, 3 and 4, and the feeding conveyor 5 It vigorously jumps out of, hits the back stop 7, and falls onto the pallet 8 on the down stacker 6. Then, when the corrugated cardboard sheets A on the pallet 8 are stacked, the down stacker 6 is lowered to the same level as the carry-in conveyor 9 and the carry-out conveyor 10 as shown in FIG. Further, when the down stacker 6 descends, the carry-in conveyor 9 and the carry-out conveyor 10 follow the down stacker 6 and descend.

Therefore, when the predetermined position is reached as shown in FIG. 6, all of the down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10 are stopped. Next, the roller conveyors 11 of the down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10 rotate to move the pallets on the down stacker 6 to the carry-out conveyor 10 side as shown in FIG. The pallet 8 is moved onto the down stacker 6. The movement ends, as shown in FIG. Next, the down stacker 6, the carry-in conveyor 9, and the carry-out conveyor 10 are returned to the original position shown in FIG. 9, and the corrugated board sheet A is supplied onto the down stacker 6 and a new pallet 8 is supplied onto the carry-in conveyor 9. And carry-out conveyor 10
The upper pallet 8 is transferred to the next process.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a corrugated board sheet stacking apparatus and a corrugated board sheet stacking method according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic plan view of a corrugated board sheet stacking device according to the present invention. FIG. 2 is a schematic side view of the corrugated board sheet stacking device of FIG. In FIG. 1, a sandwich conveyor 1, separation conveyors 2, 3, 4, a feeding conveyor 5 and a down stacker 6 are arranged in the order of progress of corrugated board sheets (see FIG. 4). On the front side of the down stacker 6, a back stop 7
Is erected. Further, on both sides of the down stacker 6, a carry-in conveyor 9 that sends an empty pallet 8 (see FIG. 3) to the down stacker 6, and a carry-out conveyor that sends the pallet 8 on which a predetermined number of cardboard sheets are stacked from the down stacker 6. A conveyor 10 is provided.

In FIG. 2, the separating conveyors of the separating section K are arranged substantially parallel to the floor surface FL. Further, a part of the stacker section S is arranged in a part of the pit 18. Further, the separating conveyor 2 has an endless separating conveyor 2 and at least one separating conveyor 2a on the outer periphery thereof, and the corrugated board sheet A that is continuously supplied is placed on the respective conveyors 2 and 2a for each order. As I tried to sort without stopping the flow, corrugated cardboard sheet A
The flow of is stable, and it is configured so that it can be conveyed with less turbulence. Further, since the speed of each conveyor can be controlled individually, when the preceding order of the corrugated board sheet A is placed on the endless conveyor, if the conveyor is operated at a high speed, a large gap with the succeeding order can be secured. You can
It was configured so that it would have more time to prepare for acceptance in the next process.

The down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10 are provided with roller conveyors 11 on their upper surfaces. FIG. 3 is a perspective view showing a part of the roller conveyor 11. In FIG. 3, the roller conveyor 11 is
Frame 12 and roller 13 supported on frame 12
A motor 14 attached to the end of the frame 12 and a drive sprocket 15 axially attached to the output shaft 14a of the motor 14.
And a driven sprocket 16 mounted on a support shaft 13a of the roller 13, a drive sprocket 15 and an endless chain 17 stretched around a large number of driven sprockets 16.

FIG. 4 is a process explanatory view showing the positional relationship of the original positions of the down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10. The positions of the carry-in conveyor 9 and the carry-out conveyor 10 are arranged above the floor so that one lot can be handled even if the quantity is small. In FIG. 4, lower parts of the down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10 are arranged in a pit 18 and provided with elevating means 19. As the elevating means 19, known means such as a hydraulic type, a mechanical type, and a combined type are used.

In the corrugated board sheet stacking apparatus having such a structure, the corrugated board sheets A are stacked as follows. In the embodiment, a corrugated cardboard sheet A processed from a continuous sheet into a predetermined size and shape according to the order
Is a sandwich conveyor 1, a separation conveyor 2,
It is conveyed to the feeding conveyor 5 by 3, 4 and vigorously jumps out of the feeding conveyor 5, hits the back stop 7 and falls onto the pallet 8 on the down stacker 6. Then, when the corrugated cardboard sheets A on the pallet 8 are stacked, the down stacker 6 is lowered to the same level as the carry-in conveyor 9 and the carry-out conveyor 10 as shown in FIG. Further, when the down stacker 6 descends, the carry-in conveyor 9 and the carry-out conveyor 10 follow the down stacker 6 and descend.

Therefore, when the predetermined position is reached as shown in FIG. 6, all of the down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10 are stopped. Next, the roller conveyors 11 of the down stacker 6, the carry-in conveyor 9 and the carry-out conveyor 10 rotate to move the pallets on the down stacker 6 to the carry-out conveyor 10 side as shown in FIG. The pallet 8 is moved onto the down stacker 6.

The movement ends, as shown in FIG.
Next, the down stacker 6, the carry-in conveyor 9, and the carry-out conveyor 10 are returned to the original position shown in FIG. 9, and the corrugated board sheet A is supplied onto the down stacker 6 and a new pallet 8 is supplied onto the carry-in conveyor 9. Then, the pallet 8 on the carry-out conveyor 10 is transferred to the next process.

[0024]

As described above, in the corrugated board sheet stacking apparatus and corrugated board sheet stacking method according to the present invention, the carry-in conveyor and the carry-out conveyor follow the descending down stacker, and the corrugated board is stacked at any predetermined position. By sending the sheets to the carry-out conveyor and at the same time sending the empty pallets on the carry-in conveyor onto the down stacker, it is possible to shorten the time for each lot change. Further, by adopting a semi-underground system for the stacker, it is possible to save space and keep the height of the entire device low. Along with this, the inspection and maintainability is further improved.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a corrugated board sheet stacking device according to the present invention.

FIG. 2 is a schematic side view of the corrugated board sheet stacking device of FIG.

FIG. 3 is a perspective view showing a part of a roller conveyor in a corrugated board sheet stacking device.

4A to 4C are process explanatory views showing a state of an original position in carrying out a corrugated board sheet stacking method by the corrugated board sheet stacking apparatus shown in FIG.

5 is a process diagram showing a state in which the down stacker is lowered to the original position of the adjacent carry-out conveyor and carry-in conveyor in the method of stacking corrugated board sheets by the corrugated board sheet stacking apparatus shown in FIG. 1. FIG.

FIG. 6 is a process diagram showing a state where the corrugated board sheet stacking apparatus shown in FIG.

FIG. 7: Carrying out the corrugated board sheets at the predetermined position in the corrugated board sheet stacking method shown in FIG.
It is process drawing which shows a carrying-in state.

FIG. 8: Carrying out at a predetermined position in carrying out the corrugated board sheet stacking method by the corrugated board sheet stacking apparatus shown in FIG.
It is process drawing which shows a carrying-in completion state.

FIG. 9 is a process diagram showing a state where the cardboard sheet stacking device shown in FIG.

FIG. 10 is a side view of a conventional sheet stacking device.

11 is a plan view of the sheet stacking device of FIG.

12 is an explanatory diagram showing an operation of the sheet stacking device of FIG.

[Explanation of symbols]

 A Corrugated cardboard sheet 1 Sandwich conveyor 2, 3, 4 Separation conveyor 2a Separation conveyor 5 Feeding conveyor 6 Down stacker 7 Backstop 8 Pallet 9 Carry-in conveyor 10 Carry-out conveyor 11 Roller conveyor 12 Frame 13 Roller 14 Motor 15 Drive sprocket 16 Driven sprocket 17 Endless Chain 18 Pit 19 Lifting means

Claims (2)

[Claims] 1. A pallet provided with a stacker which is sequentially lowered as it receives and stacks corrugated cardboard sheets from a sheet transporting conveyor, and is provided with a loading / unloading conveyor on its upper surface, and which is located below both sides of the stacker and follows the lowering of the stacker. A corrugated board sheet stacking device, characterized in that a feed-in conveyor for supply and a carry-out conveyor for transferring stacked corrugated board sheets are arranged so as to be vertically movable. 2. A sheet stacking step of stacking corrugated cardboard sheets stacked and conveyed in a tiled shape on a stacker, a stacker descending step of descending the stacker according to the sequential stacking of corrugated cardboard sheets, and a stacker from a predetermined position. Following the descending process, the adjoining carry-in conveyor and carry-out conveyor descend, and when the stacker with a predetermined number of cardboard sheets is stopped, the stacked cardboard sheets are transferred to the carry-out conveyor and at the same time the pallet is carried from the carry-in conveyor to the stacker. Carry-in / carry-out process, and return process of raising the stacker, carry-out conveyor, and carry-in conveyor to their original positions,
A corrugated cardboard sheet unloading method, which comprises unloading and moving a corrugated cardboard sheet loaded from a unloading conveyor that has returned to its original position.