JPS60202054A - Method of piling-up cardboard sheet in stacker for cardboard - Google Patents

Abstract

PURPOSE:To improve working efficiency, by a method wherein a placing table, which, during the starting of a work, is positioned about halfway between a bottom and a highmost level to which cardboard sheets are piled up, is lowered with the progress of a piling-up work, and the forward end of a feed conveyor is raised. CONSTITUTION:An elevating frame 16, elevating the forward end of a feed conveyor 11, and a table frame 17, on which a placing table 12 for placing cardboard sheets thereon is placed, are elevatably located along a pair of struts 15 erected on both sides of the extension of the feed conveyor 11. The placing table 12 and the table frame 17 are elevated through rotation of chains 19 and 21 run around sprockets 18, 18' and 20, 20'. In which case, the feed roller 11 is supported to the elevating frame 16 so that the forward end thereof is elevated within a range above a spot located about halfway between a bottom to a highmost level to which the cardboard sheets are piled up on the placing table 12. Meanwhile, the placing table 12 is elevated within a range under about the intermediate level, and with the progress of a piling-up work, the elevating frame 16 is raised, and the table frame 17 is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for stacking plate materials or sheet materials continuously fed by a conveyor on a loading table, and is characterized in that both the loading table and the feed conveyor can be raised and lowered freely. be.

When completely processing board materials such as plywood or cardboard, or sheet materials, a method is adopted in which the entire original board is first cut to a predetermined size and then fLK surface treatment is applied.
For example, cardboard is mainly used for packaging, but this surface material? To manufacture, first, the original cardboard sheet is cut into a shape suitable for all products, and then creases, slits, etc. are made in it, and then it is transferred to a printing machine and printed. By the way, in this case, there is a considerable difference in processing speed between the first process of cutting the original sheet metal and the second process of printing on the cut cardboard, and it is relatively easy to change the loft in the first process. On the other hand, in the second process, it takes at least several minutes to change lots, so it is not possible to perform both processes completely continuously. For this reason, the cutting device and the printing device have to be separate devices, so the cutting device is equipped with a full stacker to cut the cardboard sheets. It is necessary to once stack them on a mounting table and stock them.

FIG. 1 shows an example of a conventional stacker, in which 1 is a feed conveyor and 2 is a mounting table.

The feed conveyor 1 is a cardboard sheet cut into a predetermined shape and fed out from a cutting device)P? The cardboard sheets P are fed to a loading table 2 and stacked up, while the loading table 2 is placed on a take-out conveyor 3.
Each time the tables are piled up to a certain height, they are removed and replaced with a new one. Although the cutting equipment will not be explained in particular, it will include a feeding device for the original cardboard sheet, a cutting machine 4, a loft change conveyor, a lap conveyor 5, etc., a feed conveyor, a feed conveyor, and a conveyor. 5, and the rear end is used as a starting end shaft to move up and down.

This is to keep the feeding conditions of the cardboard sheet P as constant as possible when transferring it from the feed conveyor 1 to the mounting table 2, and the cardboard sheet fed from the feed conveyor 1 to the mounting table 2. is placed on top of the cardboard sheets stacked on the loading table 2 first, so the rear end of the feed conveyor 1 is lowered to the lowest position, closest to the loading table 2, at the start of the finishing process. It is raised as the height of the seat increases.

As mentioned above, the conventional stacker is designed to gradually rise from the lowest position as the work of stacking cardboard sheets progresses, and therefore has the following drawbacks.

(1) There is a large difference in the inclination angle of the feed conveyor 1 between the start and end of stacking work, with the former being a downward slope and the latter being an upward slope, resulting in a difference in the feeding conditions of the cardboard sheets. . Therefore, the stacking on the mounting table becomes uneven, resulting in uneven processing in the next process. In particular, if the degree of misalignment is significant, the edges of the cardboard sheet may overlap with the adjacent ones, creating tiers and resulting in a defective product.Also, if the degree of misalignment is large, it may be impossible to supply the cardboard sheet. A situation arises in which

(2) When feed conveyor 1 is tilted downward (Fig. 2 (a)
) and the lap conveyor 5 when tilted upward (FIG. 2(b)). On the other hand, the cardboard sheets are stacked one on top of the other and placed on the conveyor because there is a speed difference of several times between the processing speed of the cutter and the conveyor.

Therefore, when the cardboard sheet P reaches the starting end of the feed conveyor 1, it bends depending on the amount of the feed conveyor IN, but when this angle is negative, this tendency becomes more pronounced, and moreover, it bends and becomes bent. Since this does not disappear on cardboard sheets, it causes printing defects and makes it impossible to supply the sheets to the next process. Similar bends also occur when the cardboard sheet P is dropped from the tip of the feed conveyor 1 into the hopper.

(3) When the predetermined amount of stacking on the loading table 2 is completed, stacking on the next new loading table is completed.In order to start stacking on the next new loading table, it is necessary to lower the rear end of the feed conveyor 1 from the highest level to the lowest level. Since this descending distance is long, the paperboard sheet P is divided for a long time. Of course, during this period, the cardboard sheet P is not fed from the feed conveyor 1 to the mounting table 2, and on the other hand, the cutting device is operated at a high efficiency. Continue driving to avoid a drop in
Cardboard sheets P are accumulated on the feed conveyor IK.・Since the cardboard sheets P are stacked one on top of the other on the conveyor 1, as the accumulated amount of cardboard sheets P increases, the stacking becomes denser. If the amount of accumulation changes and the amount of accumulation slows down beyond a certain level, the cardboard sheets will be stacked unevenly, or it will become impossible to feed them onto the mounting table 2. Therefore, it is necessary to prevent the stacking amount of cardboard sheets P from becoming constant on the board, but in order to do so, it is necessary to suppress the processing speed of the cutting device and reduce the number of cardboard sheets processed per unit time. As a result, the production capacity of corrugated cardboard sheets will be reduced.

The present invention completely eliminates all of the drawbacks of the conventional stacker described above, and includes the rear end portion of the feed conveyor. In addition to making it possible to raise and lower the feed conveyor, the loading table can also be raised and lowered, and once the loading table has been raised to an appropriate height, the entire raising and lowering range of the feed conveyor can be narrowed to accommodate the full stacking of cardboard sheets. This eliminates bending and uneven stacking of cardboard sheets, and completely improves the production efficiency of cardboard sheets.

Hereinafter, the present invention will be specifically explained based on an actual example shown in the drawings. In the figure, reference numeral 11 is a feed conveyor, 12 is a mounting table, and
is the take-out conveyor. The feed conveyor 11 is similar to the conventional one described above, and is connected to the lap conveyor 14K, and is used to feed and stack cardboard sheets sent from the lap conveyor 14 onto the mounting table 12.The % inclination angle is completely variable. It is designed so that it can be turned into a corner, and the tip is placed on the mounting table 12 with a cardboard sheet)P? When stacked at the highest level, the table 12 is raised and lowered in the range above the middle position of y, while the mounting table 12 is raised and lowered in the range below the middle position. There are no particular limitations on the elevating and lowering mechanisms for both.

The point is that both are at the middle IH 1st position when the work starts, and the cardboard sea IP is placed from the feed conveyor 11 to the loading table 12? As the loading amount of the cardboard sheet P to be fed increases, the mounting table ν moves downward, and the tip of the feed conveyor 11 rises to lift the cardboard sheet P?
It is sufficient that step 9 can be continued without any trouble, and that the new mounting table and the tip of the feed conveyor 11 can be immediately returned to their original positions after the work is completed, and the next work can be started.

The figure shows a chain as an example of a lifting mechanism? A pair of columns 15.15' ft are erected on both sides of the feed conveyor 11 as an extension, and an elevating frame 16 and an underframe 17 are attached to these columns 15.15 so as to be movable up and down. The elevating frame 16 is for elevating and lowering the tip of the feed conveyor n, and the feed conveyor 11 is attached to the tip of the frame and moves up and down as the feed conveyor 11 moves up and down. That is, the inner surface of each column 15.15 has a single rail Kfx, to which the elevating frame 16 is slidably attached, and
A pair of upper and lower sprockets 18.1♂ are attached to the inner surface, and a chain 19 is engaged with the sprockets, to which one end of the lifting frame 16 is connected. Although not shown, the sub-blocks 18 of each support column are connected to each other and rotate synchronously, and by rotating them in the forward and reverse directions, the elevating frame 16 is raised and lowered. The underframe 17 is used to raise and lower the kneading dough on which the platform 1d 12 is placed, and is attached to the support 15 so as to be able to rise and fall freely, forming a kind of rail. Furthermore, a pair of sprockets 20% 20' are attached to the upper and lower outer surfaces, and a chain 21 is attached to these, and one end of the underframe 12 is connected to one of the points. be.

Needless to say, regarding the position and relationship between the lifting frame 16 and the underframe 17 at the start of the work, the feed conveyor 11 is placed on the loading table 12 placed on the underframe 17. vc cardboard -/-)
The position should be such that it can be returned to in a time of .
Then, when feeding of the cardboard sheet (P) to the mounting table 12 is started, the underframe 17 is completely lowered and the elevating frame 16 is raised.
A new cardboard sheet P'(r7) is synchronized with the stacking speed of the cardboard sheets stacked on the uppermost surface of the cardboard sheets loaded on the elevator frame 1.
6 and the underframe 17 are not particularly limited in their speed relationship as long as the above-described positional relationship is maintained.

For example, both at the same time as work starts? Can it be raised and lowered, or is the underframe 17 first? There is no problem even if the elevator frame 16 is lowered and then raised when it reaches the lowest position.As detailed above, the present invention allows the elevator frame and the underframe to be placed in their normal positions by placing the cardboard sheet on the mounting base. When the cardboard sheets are piled up to the highest level, it is at the middle position, and as the height of the cardboard sheets increases, the underframe 17 is lowered completely, and the lifting frame 16k is lowered.
By raising it up, the time required for both cardboard boxes to return to their original positions after loading is approximately half that of the conventional method, which reduces lost time and improves work efficiency. Also, by reducing loss time, the amount of cardboard sheets that accumulate on the feed conveyor is halved, eliminating feed errors.

Are the cardboard sheets aligned on the mounting table, resulting in defects in the next process? In addition to solving the problem, is there a possibility that the loading operation itself will stop abnormally? It eliminates it.

In addition, since the amount of variation in the inclination angle of the feed conveyor is halved, the cardboard sheets will not fold, and the possibility of work interruptions due to this will be eliminated, so overall work efficiency will be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional stacker for cardboard sheets, Fig. 2 is a side view, Fig. 3 is a partially omitted side view showing an embodiment of the present invention, and Fig. 4 is a perspective view showing the main parts of the same. It is a diagram. 11; Feed conveyor 12; Placement stand ia
Take-out conveyor 14; Lap conveyor 15; Support column 16; Lifting frame 17; Base frame 18; Sprocket 19; Chain 20: Sprocket 21; Chain

Claims (1)

[Claims] In the stacker that stacks cardboard sheets cut into appropriate shapes onto a loading table, the loading table can be raised and lowered freely, and the feed conveyor's tip can be raised and lowered. The cardboard sheet is located at the intermediate position when lifted up to the highest level, and as soon as the work of stacking the cardboard sheets on the loading table starts, the loading table is lowered, and the tip of the feed conveyor is further raised. How to stack sheets.