JPH01127561A - Stacking device for sheet - Google Patents

Abstract

PURPOSE:To compactly set the length of the whole device and sharply improve productivity by providing two sets of sheet stacking tables in parallel and alternately using these tables. CONSTITUTION:Sheets 3 are conveyed by means of a conveying conveyor 6 one after another and hit against a front stopper 9 to stop an advancing force, and allowed to fall downward to be stacked on a table 7. As it is detected that a certain quantity of sheets 3 are stacked, the table 7 is lowered and the conveying conveyor is stopped to stop the feeding of the sheets 3. Then, by moving a bogie 24, the table 7 is moved out of a line while setting a table height, etc., to the initial condition, another sheet stacking table on standby is set in position on the manufacture line, and the conveying conveyor 6 is made travel to start the feeding and stacking of the sheets 3 in store. Hence, the stacking operation can be continued merely by changing the position of both tables, enabling the whole device to be compactly set while increasing the efficiency of a sheet stacking process to sharply improve productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sheet stacking device for stacking and discharging corrugated pole sheets manufactured in the final process of a corrugated pole manufacturing device.

[Conventional technology]

A conventional sheet stacking device will be explained with reference to FIGS. 4 to 6. The corrugated paperboard web 1 that is continuously produced in the previous process is longitudinally cut into several lengths along the traveling direction, and then cut into predetermined lengths in the width direction at cutoffs 2 to form corrugated paperboards 7 and receipts 3. The sheets 3 are discharged from the cut-off exit conveyor 4 to the shingling conveyor 5, which is operated at a slower speed than the conveyor 4, and are stacked in the shape of roof tiles. It is discharged onto T. The discharged sheets 3 hit the front plate 9 and fall downward, and are stacked on the sheet stacking table 7. The upper end level of the sheets stacked on the tape holder 7 is detected by a group of phototubes 8, and the elevation of the table 7 is controlled so that the height from the conveyor 6 is approximately constant.

The tape/L/7 is driven up and down by a motor 10 in response to a signal from a phototube group 8, and also by operating a hydraulic cylinder via a control device (not shown) and a solenoid valve to control the table's lowering speed.

A method has also been proposed in which the stopping accuracy is controlled so that sheets can be stacked while always maintaining the best height. Reference numeral 11 in the drawing indicates a limit switch that operates to lower the tape/I/7 and stop the drive of the table, etc. After a predetermined amount of sheets 3 have been stacked, the tape/v7 is reset in the following procedure. Sheet 8 as shown in Figure 6(a)
are stacked, tape Lv7 is lowered, and when a predetermined amount is reached, limit switch 11 is activated and tape L/7 is lowered.

The conveyor 6 stops running and the supply of the sheets 8 is stopped. At the same time, the running speed of the shingling conveyor 50 is switched to low speed. The stacked sheets 8 are shown in Fig. 6 (
As shown in b), the tape is discharged to the outside from tape/l/7 and 1
Transported to the next process.

Tape Iv emptied by discharging stacked sheets
7 is the initial condition as shown in FIG. 6(C).

It rises until the toe head reaches state (a) and then stops. After setting these initial conditions, the conveyor 6 is driven again and the sheet 8 that has been waiting is fed and supplied as shown in FIG. 6(d).
Start as shown. The conveyor 6 is in the initial stage of re-driving.

It is set to run at a somewhat high speed and use up the stocked sheets 3 within the time required to reset the table. Note that after the stock amount is used up, the traveling of the conveyor 6 is reset to the standard speed.

[Sleep point that invention attempts to solve]

The conventional method uses a table to stack sheets.

After only one piece is installed and it is stacked a certain amount.

The time required for discharging the sheet from the table, raising the table, and supplying the next corrugated sheet was a great deal. For this reason, the number of sheets that can be stacked within a unit time is limited, which has a direct effect on reducing the production line speed (production amount) of corrugated pole sheets. Also, discharge of stacked sheets.

In order to take the time required to reset the table and to stock the sheets that have been discharged one after another in the previous process, it was necessary to use a shimbling conveyor, transport conveyor, etc. that is quite long in the direction of travel.

[Means for solving problems]

The present invention was proposed in view of the above-mentioned conventional problems.
A means to solve this problem is to set up two sets of sheet stacking tables in parallel so that they can be used alternately.

[Effect]

When a predetermined amount of sheets are stacked, the table is pushed out of the production line, and another sheet stacking table is transferred to a predetermined position on the production line to receive the primary sheets. During this time, the stacked sheets are discharged from the table pushed out of the line, and the empty pallet is placed on the table and the initial conditions are set.

〔Example〕

Nine embodiments of the present invention will be described below with reference to FIGS. 1 to 3. After the corrugated cardboard web 1 is cut along the traveling direction, it is cut into predetermined lengths in the width direction at cutoffs 2 to form sheets 3.

Cut-off exit conveyor 4. Singling Combe 75.
The process until the sheets are stacked on the sheet stacking tape/I/7 via the transport conveyor 6 is the same as the conventional method.

The sheet stacking device of this embodiment has two sheets on one cart 24.
A table 7.7' is attached to the upper end of the piston of each hydraulic cylinder 25.25; The cart 24 moves on a rail 26 laid out on the floor at right angles to the conveyance direction of the conveyor 6. Each hydraulic cylinder 25.25' has a solenoid pulp 21, 2
1'. The phototube group 8 and the limit switch 11 are provided in the same manner as before, and the output of the phototube group 8 is sent to the controller 22, which operates the solenoid 20.20' of the solenoid valve 21.21' to close the tape/L. Controls the movement of /7°7/. Note 2
In the figure, A indicates the center position of the conveyor 6, which is hereinafter referred to as a production line. Next, the operation of this embodiment will be explained. As shown in FIGS. 1 and 2, the sheets 3 are sequentially conveyed by the conveyor comparer, and the forward force of the sheets is stopped by the front stopper 9.
It falls downward and is stacked on tape/l/7. The stacking head (a) of sheet 3 is:

It is detected by a group of phototubes 8 installed on the side with respect to the traveling direction, and a signal corresponding to the light blocking state of each phototube is sent to the controller 22 to operate the solenoid 20. Since the piston g movement m of the cylinder 25 and the opening amount of the solenoid that controls the speed are finely adjusted depending on the light shielding state of the phototube group, the head of the sheet supply section can always be set in a stable state. In the figure, reference numeral 11 indicates a limit switch which detects when the table 7 is lowered and a predetermined amount of sheets 3 are stacked, and stops the lowering of the table 7 and the running of the conveyor 6 as shown in FIG. 8(a). 8
to stop the supply of Next, move one cart 24,
As shown in FIG. 3(b), the tape/V7 is transferred to the outside of the production line, and another sheet stacking tape IL/'I' is set to the initial conditions such as the table height.
is installed at a predetermined position on the production line, and the conveyor 6 is run to start supplying and stacking the sheets 3 in stock. During this time, the stacked sheets on the table 7 transferred outside the line are discharged by the discharge conveyor 27' as shown in FIG. 8(C), and furthermore, as shown in FIG.
/7 is raised to a predetermined position and initial conditions are set, and the table is held until a predetermined amount of sheets are stacked on the table.

Thereafter, the above-described sheet stacking tape /L/7.7' is replaced alternately. FIG. 3 is an explanatory diagram of exchange settings for explaining the above cycle.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be modified in nine different ways without departing from the gist of the present invention. For example, although there is one trolley in this embodiment, a trolley may be provided for each table.

〔Effect of the invention〕

As explained above, according to the sheet stacking device of the present invention, while one table is in use, the other table can be set, and the sheet stacking operation can be continued simply by changing the position of one table. The overall length of the device can be set compactly, such as by being able to set it short. Furthermore, by improving the efficiency of the sheet stacking process, which has been a bottleneck due to production efficiency issues, a significant improvement in productivity can be achieved.

[Brief explanation of the drawing]

1 to 8 show an embodiment of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a front view, and FIG. 8 is an explanatory diagram illustrating a table exchange setting state. Figure 4 is a plan view showing a conventional sheet stacking device;
The figure is a front view of FIG. 4, and FIG. 6 is an explanatory view showing the working state of FIG. 4.

Claims (1)

[Claims] In a sheet stacking device that stacks corrugated cardboard sheets that are continuously conveyed by a conveyor on a table provided at the end of the conveyor and conveys them to the next process, two sets of the tables are installed in parallel and the A sheet stacking device characterized in that it can be set at a downstream position of a conveyor.