JPH04350037A - Storing device for sheet - Google Patents

Abstract

PURPOSE:To form a prescribed gap to the flow of sheets without disturbing the flow of the sheets, in a sorting device for sheets by simply constituting it. CONSTITUTION:In a sorting device for sheets by which a prescribed gap is formed between the preceding board sheet group and the following board sheet group in the continuous flow of sheets, in the transferring process of sheets by means of a plurality of conveyors 11 to 15 which have been arranged in series; a sorting region is provided between adjacent conveyors. The sorting device is provided with a conveyor-speed control device 20 (not shown) by which the speed of the next stage conveyor is increased from a steady speed in the timing that the rear leaf sheets of the preceding board sheet group have been completely transferred to the next stage conveyor, and the speed of the next stage conveyor is returned to the steady speed in the timing directly before the forefront sheet of the following board sheet group starts to be transferred to the next stage conveyor.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for sorting sheets such as paperboard, plastic plates, metal plates, etc.

0002

2. Description of the Related Art Generally, sheets of paperboard or the like cut into a predetermined shape are conveyed by a conveyor and stacked on a stacking device located on the exit side of the conveyor. In addition, when moving the stack laterally after the required number of sheets have been stacked on the stacking device, ■ replace the old and new stacking devices, and move the stack together with the old stacking device. Then, either transfer the following sheets to a new loading device, or ■ Insert a separation fork onto the loading device, move the above-mentioned stack horizontally under the separation fork, and then transfer the following sheets onto the separation fork. It is conceivable that the stacked bodies be temporarily stacked, and after the stacked body is moved laterally, the separation fork is removed and the new stacked body on the separation fork is transferred onto the stacking device.

By the way, in the conveyance process using the conveyor, regardless of the method (1) or (2) above, it is necessary to form a constant gap in the flow of the sheets at a timely manner. That is,
This is because it is necessary to interrupt the discharge of the sheet material while replacing the old and new loading devices in the method (2) above, and while inserting the separation fork in the method (2).

0004

[Problems to be Solved by the Invention] However, in conventional sheet conveyor devices, as a method of forming a certain gap in the flow of sheet materials, for example, a dam that rises between the front and rear conveyors is used. This is done by using a board, etc. For this reason, the damming may disturb the posture of the sheets and the positional relationship of adjacent sheets after the damming, resulting in problems with smooth re-transportation after the damming is released, and subsequent This is accompanied by inconveniences such as the impossibility of orderly stacking.

[0005] An object of the present invention is to form a constant gap in the flow of sheets of paper without disturbing the flow of the sheets of paper using a simple structure.

[0006]

[Means for Solving the Problems] The present invention as set forth in claim 1 is directed to a process in which a group of preceding sheets is conveyed by a plurality of conveyors arranged in series, in a continuous flow of sheets. In a sheet sorting device that forms a predetermined interval between subsequent groups of sheets, a sorting area is provided between adjacent conveyors, and the timing when the trailing sheet of the preceding sheet group is completely transferred to the next conveyor. The conveyor speed control device increases the speed of the next-stage conveyor from a steady speed and returns the next-stage conveyor to the steady speed at the timing immediately before the first sheet of the following sheet group starts to be transferred to the next-stage conveyor. This is what I did.

[0007] In the present invention as set forth in claim 2, the conveyor speed control device provides a sorting area between each of three or more conveyors arranged in series, and controls the speed of the next-stage conveyor relative to the upstream sorting area. Furthermore, the speed control is also performed on the next stage conveyor for the downstream sorting area downstream from the upstream sorting area.

[0008]

[Operation] According to the present invention as set forth in claim 1, the following (1) is achieved.
There is an effect.

(1) The conveyor speed control device starts transferring the leading sheet material of the following sheet group to the next stage conveyor after the trailing sheet object of the preceding sheet group has been transferred to the next stage conveyor. The speed of the next stage conveyor is increased from the steady speed until just before the next stage is reached. As a result, the preceding group of sheets on the next-stage conveyor is carried out at a higher speed than the following group of sheets that have not yet been transferred to the next-stage conveyor, and as a result, a predetermined interval is formed between the preceding and following groups of sheets. .

According to the present invention as set forth in claim 2, the following (
2) It has the following effect.

(2) The conveyor speed control device is
Repeat the conveyor speed control in (1) above in multiple downstream sorting areas. Therefore, the interval formed in the upstream sorting area is further expanded between the preceding and succeeding sheet groups in the downstream sorting area, and as a result, a large interval can be formed.

0012

[Example] Figure 1 is a schematic diagram showing an example of the present invention, and Figure 2
is a control system diagram of the present invention.

The sheet material processing line, as shown in FIG. It is configured as follows.

[0014] The cutting machine 10 cuts, for example, a paperboard 1 fed out from a roll of material into a predetermined shape. The paperboard 1 cut by the cutting machine 10 is sent from the supply conveyor 11 and the speed increasing conveyor 12 to the overlap conveyor 13.
overlapped like scales. The paperboards 1 that have passed through the overlap conveyor 13 are sequentially stacked on a stacking device 16 via a sorting conveyor 14 and a delivery conveyor 15. When this stacking device 16 detects that a required number of paperboards 1 have been stacked on the board stand 18 using a sensor (not shown), it inserts a separation fork 19 into the paperboard 1 input area and stacks the stacked paperboards on the board stand 18. is moved laterally, the following paperboard 1 is temporarily stacked on the separation fork 19, and when the empty board table 18 returns, the separation fork 19 is removed and the new stacked body on the separation fork 19 is placed on the board table 18. Transfer.

Note that each conveyor 11 to 15 is controlled by a control device 2.
It is driven by motors 21-25 controlled by 0. When the line speed is V (for example, 250 m/min), the supply conveyor 11 is operated at a speed of 1.04 V, which is slightly faster than the cutting machine 10, and the speed increasing conveyor 12
is operated at a relatively high speed, for example, 1.20V, and the other conveyors 13 to 15 are operated at a relatively low speed, for example, 0.6V.
~0.3V steady speed to 1.20 timely for sorting
It is configured so that the speed can be increased to V.

Further, the gate 17 is disposed between the supply conveyor 11 and the speed increasing conveyor 12 and is driven by a drive device 26, and functions as a gate for removing waste paper and samples, and also serves as a gate for removing waste paper and samples. A plurality of paperboards 1 are extracted from the flow of paperboards 1 being conveyed,
A required spacing is formed between the previous and subsequent paperboard groups.

Also, as a control signal source for realizing the sorting function, paperboard detectors 27 and 28 are used to detect the material of the paperboard 1 in order to track the interval between the previous and subsequent paperboard groups formed at the gate 17. are installed between the speed increasing conveyor 12 and the overlap conveyor 13, and between the overlap conveyor 13 and the sorting conveyor 14, and pulse generators 29 and 30 for detecting the moving distance of the paperboard 1 are connected to the overlap conveyor 13 and the sorting conveyor 14. are doing.

However, in order to form a space for inserting the separating fork 19 in the flow of paperboard 1, the control device 20 forms a necessary and sufficient interval in the flow of paperboard 1 according to the following steps 1 to 2. .

(2) When the required loading amount for the loading device 16 passes through the gate position, the gate 17 is activated and several sheets of paperboard 1 are taken out. Thereby, in the continuous flow of paperboard 1, a required interval is formed between the preceding and succeeding paperboard groups.

[0020] Simultaneously with the gate operation, the speed of the four downstream conveyors 12 to 15 is increased higher than that of the supply conveyor 11 to complement the spacing creation function. Also, after returning to the gate, the speed increase is canceled. .

■After the paperboard detector 27 on the entrance side of the overlap conveyor 13 detects the arrival of the interval (■), the position of the interval is tracked through the count value of the pulse generator 29, and the paperboard detector 27 on the entrance side of the overlap conveyor 13 tracks the position of the interval At the timing when the interval shifts to the sorting area between the conveyor 14, in other words, at the timing when the trailing paperboard 1 of the preceding paperboard group has been transferred to the sorting conveyor 14, the speed of the conveyors after the sorting conveyor 14 is increased from the steady speed. , increasing the interval.

Incidentally, the speed of the conveyors after the sorting conveyor 14 is increased at the timing when the increased interval is transferred to the sorting conveyor 14, in other words, at the timing immediately before the leading paperboard position of the succeeding paperboard group starts to be transferred to the sorting conveyor 14. unlock.

■ Sorting conveyor 14 and delivery conveyor 1
In the sorting area between 5 and 5, the speed of the delivery conveyor 15 is increased from the steady speed based on the detection results of the paperboard detector 28 and the pulse generator 30, as in the above case 2, and the interval between the preceding paperboard group and the following paperboard group is increased. further increases to achieve the necessary and sufficient spacing.

That is, according to the above items 1 to 2, the distance between the previous and subsequent paperboard groups is created by the gate 17 in the above item 1, and then further between the overlap conveyor 13 and the sorting conveyor 14 in the items 2 and 3 above. is increased between the sorting conveyor 14 and the sending conveyor 15, and is made to grow to a necessary and sufficient interval.

[0025] The control device 20 causes the interval between the paperboard groups formed in step (1) above to grow by the following (a) to (c), not by the methods (2) and (2) above. Also good.

(a) At the timing when the trailing paperboard 1 of the preceding paperboard group is completely transferred to the overlap conveyor 13, the speed of the conveyors 13 to 15 is increased from the steady speed to widen the interval between the preceding paperboard group and the following paperboard group. .

Immediately before the leading paperboard 1 of the following paperboard group starts to be transferred onto the overlap conveyor 13, the speed increase of the conveyors 13 to 15 is canceled.

(b) At the timing when the trailing paperboard 1 of the preceding paperboard group has been transferred to the sorting conveyor 14, the conveyor 14
, 15 are increased from the steady speed, and the interval between the preceding paperboard group and the following paperboard group is further expanded.

The leading paperboard 1 of the following paperboard group is on the sorting conveyor 1
Just before starting the transfer to conveyor 14,
15 speed increase is canceled.

(c) At the timing when the trailing paperboard 1 of the preceding paperboard group is completely transferred to the delivery conveyor 15, the speed of the conveyor 15 is increased from the steady speed to further widen the interval between the preceding paperboard group and the following paperboard group.

Immediately before the leading paperboard 1 of the succeeding paperboard group starts to be transferred to the sending conveyor 15, the conveyor 1
Cancel the speed increase of 5.

In the above (a) to (c), the location of the paperboard 1 with respect to each conveyor 13, 14, 15 is tracked by, for example, the paperboard detector 27 and the pulse generator 29.

As described above, according to the above embodiment, the following effects (1) and (2) are obtained.

(1) The conveyor speed control device 20 starts transferring the leading paperboard of the following paperboard group to the next conveyor after the trailing paperboard 1 of the preceding paperboard group has been transferred to the next conveyor in the sorting area. The speed of the next stage conveyor is increased from the steady speed until just before. As a result, the preceding paperboard group on the next-stage conveyor is carried out at a higher speed than the subsequent paperboard group that has not yet been transferred to the next-stage conveyor, and as a result, a predetermined interval is formed between the previous and succeeding paperboard groups.

(2) The conveyor speed control device 20 repeats the conveyor speed control described in (1) above in a plurality of upstream to downstream sorting areas. Therefore, the gap formed in the upstream sorting area is further expanded between the preceding and succeeding paperboard groups in the downstream sorting area, and as a result, a large gap can be formed.

[0036]

As described above, according to the present invention, a constant gap can be formed in the flow of sheets of paper without disturbing the flow of the sheets of paper with a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the present invention.

FIG. 2 is a control system diagram of the present invention.

[Explanation of symbols]

11 Supply conveyor 12 Speed-up conveyor 13 Overlap conveyor 14 Sorting conveyor 15　Feeding conveyor 20 Control device

Claims (2)

[Claims] [Claim 1] In the process of conveying sheets by a plurality of conveyors arranged in series, sheets forming a predetermined interval between a preceding group of sheets and a group of following sheets in a continuous flow of sheets. In an object sorting device, a sorting area is provided between adjacent conveyors, and when the trailing sheet object of the preceding sheet group has been transferred to the next conveyor, the speed of the next conveyor is increased from the steady speed to A sheet material sorting device characterized by having a conveyor speed control device that returns the next stage conveyor to a steady speed at a timing immediately before the first sheet material of a group of leaves starts to be transferred to the next stage conveyor. 2. The conveyor speed control device provides a sorting area between each of three or more conveyors arranged in series, performs the speed control on the next conveyor for the upstream sorting area, and 2. The sheet material sorting apparatus according to claim 1, wherein the speed control is also performed on a next-stage conveyor for a downstream sorting area downstream from the sorting area.