JPS58109358A - Accumulator of paper sheet - Google Patents

Abstract

PURPOSE:To prevent guided paper sheets from disturbance and clogging by detecting the uppermost height of paper sheets stacked on a mounting plate to control the uppermost height of stacked paper sheets. CONSTITUTION:When the edge of the uppermost paper sheet screens a detector, a counter 23 receives the detecting signal input S1 starts the counting. A controller 24 receives the count-up signal input S3 to send the drive control signal output to a driver 25 and drive a motor 14 for a predetermined time. A back-up plate 12 is moved slightly downward by the drive of the motor so that the uppermost height of accumulated paper sheets coincides with the initial height of the back-up plate to prevent the paper sheets from disturbance and clogging.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a stacking device for the paper industry that stacks paper sheets 114 conveyed by a conveying means in a stacking box.

Technical background of the invention and its problems An example of this type of stacking device is a device that sorts and stacks mail items. As shown in Fig. Take out one sheet at a time, and this
The paper sheets are transported by a transport means, for example, a transport belt 3, and during the transport, the information of the paper sheets (for example, postal code) is detected by a discrimination section 4, and based on the result, the paper sheets are arranged along the belt 6. Paper sheets are sorted and stacked in a predetermined stacking box out of a large number of stacking boxes 5. Details of the stacking box 5 are shown in FIG. 2. That is, each stacking box 5 arranged along the conveyance direction A of paper sheets 2 by the conveyor belt 6 has spring hangers 6.6 protruding from both walls 5g and 5m along the conveyance direction. 〇And inside the collection box 5 is a loading board (hereinafter also referred to as a back-up board) that can be moved up and down on which paper sheets are placed.
7 is placed. Protrusions 71 are provided on both sides of the back-up plate 70 along the conveying direction A of paper sheets.The protrusions 7a are inserted into the long holes 5b and 5- provided in the wall 5ae5s of the collection box 5. A tension coil spring 8 is attached to this projection and the spring hanger. In such a collection box 5, by opening a rotatable game 9 disposed at the upper opening of the collection box 5, the paper sheets 2t transported by the conveyor belt 3 can be removed from the collection box. 5 onto the back-up board 7 inside. As the amount of accumulated paper sheets increases, the back-up plate 7 is moved downward against the urging force of the tension coil spring 8. In order to keep the height of the top layer of the paper sheets stacked on the back-up plate Z almost constant, consideration has been given to making it possible to smoothly stack the paper sheets that are guided one after another. was.

However, the friction between the back-up plate 7 and the wall portions 5G, 5-inner surface of the collection box 5 and the protrusion 7a of the back-up plate 7
l and wall 5g,! Due to the effects of friction with the 5 m long holes 5h and 56 and the initial tension of the tension coil spring 8 itself, the height of the top layer of the stacked paper sheets could not be set to the desired height K. However, there was a problem in that the paper sheets that were guided to the collection box were cluttered and piled up.

Purpose of the Invention The present invention has been made based on the above-mentioned circumstances, and it is possible to set the height of the top layer of paper sheets that are sequentially stacked and stacked on a placing plate in a stacking box to a desired height. It is an object of the present invention to provide a paper sheet stacking device that can prevent paper sheets guided to a stacking box from being disturbed or jammed.

Summary of the Invention The present invention is based on the above-mentioned method based on the output from a detector that detects the height of the top layer of paper products stacked on a mounting plate that is movable in the stacking direction of the paper products. It is characterized by fully controlling the movement of the placing plate and adjusting the height of the top layer of stacked paper sheets to a desired height.

Examples of the invention The present invention will be explained below with reference to the drawings.

FIG. 3 is a schematic perspective view showing an embodiment of the paper sheet accumulating device of the present invention, and FIG. 4 is a block diagram showing the control section of the device. The direction of the arrow A shown in the sixth figure is the conveyance direction of the paper sheets 2. Along this direction, a collection box 1° is provided. This accumulation box 1o includes a bottom plate 1o, wall plates 106, 10&, which extend in the direction of the third arrow A in the figure, an upper end opening 10#, a storage chamber 10d, and side openings 10m, 10-. The upper end opening 106 is provided with a gate 11 for guiding the desired paper products 2t being transported to the storage chamber 104. The accommodation chamber 104 is provided with a placement plate (hereinafter also simply referred to as a back-up plate) 12 which is capable of placing and stacking guided, good-quality paper sheets and is movable in the stacking direction of the paper sheets. An elevator mechanism 13 is provided to move this backup plate 12.

A chain 17 is stretched between a drive sprocket 15 driven by a motor 14 and an idle sprocket 16, and the middle part of the chain 17 is attached to the back up which protrudes from a long hole 10h' provided in the wall plate 17&. The protrusion #12sK of the plate 12 is connected. Further, a detector 18 for detecting the height of the top layer of paper sheets stacked on the back-up plate 12 is provided in the side opening 10-.

Although this detector 18 is of a reflective type, it is also possible to use a transmissive type. Furthermore, as shown in FIG. 3, if the detector 18 is placed in a direction that intersects the conveyance direction of paper sheets (direction of arrow °A shown in the third figure) and at a position where it can project light onto the sides of paper sheets, The time during which the paper or leaves guided by the gate 11 falls and is stacked can be made almost constant depending on the thickness of the paper sheets, so that the time during which the paper or leaves guided by the gate 11 falls and is stacked can be made almost constant depending on the thickness of the paper sheets. It is now possible to clearly distinguish between the case where leaves block the detection 18 and the case where falling paper products reach the detector 18 before being stacked, and the result is a clear distinction between the case where paper products that fall before being stacked pass the detector 18, and the resultant stacked paper. In particular, it is possible to accurately detect the top level of the industry category. As shown in Fig. fcM3, if the detection Lft 18k is provided opposite to the side opening 10- which is provided in the direction opposite to the conveyance direction of paper sheets, the other light emitted will be directed to the opposite wall surface. Since the light is not reflected, it becomes possible to eliminate the limiting factor of the detector, which requires that the detectable distance of the detector be less than or equal to the width of the collection box 10.

A control section 20 is provided which controls the movement of the backup board 12 based on the output of the detector 18 to adjust the height of the top layer of paper sheets to a desired height.

As shown in FIG.
The output of the detector 18 is input to the output IIN terminal of the detector 18 (hereinafter simply referred to as the detection signal S1), and the output signal of the detector 18 is cleared via the inverter 21 (hereinafter simply referred to as the detection signal S1).
Hereinafter, this input signal is simply referred to as CLR.
A counter 26 inputs a signal S2) and a count setting value from the count setter 22, and an output signal from the OUT terminal of this counter 26 (hereinafter simply referred to as a count-up signal Sm). Drive controller 24 and this drive controller 24
and a driver 25 that drives the motor 14 by inputting drive control signals from the motor. The count setting value input to the naori counter 26 is determined by the time it takes for the paper sheets guided by the gate 11 to fall and be stacked to reach the detector 181. □: □Some count It is set to take a long time. Further, this counter 26 performs the detection signal 511 by manually inputting the count value based on the count setting value.
If the count-up occurs without inputting the CLR signal Slt during the process, the own count-up signal S3 is output.

Next, the operation of the paper sheet stacking device configured as described above will be explained.

Before the paper sheets 2 are accumulated, the back-up plate 12 is positioned slightly below the detector 18 at a distance of 1/1L, and is guided to a height that allows the paper sheets 2 to be smoothly accumulated. (This height is also referred to as the initial height of the back-up board hereinafter) 0 When the paper sheets 2 are guided to the storage chamber 10d via the gate 11, the paper sheets fall onto the back-up board 12. Detector 18? f-obstruct. As a result, the light emitted from the detector 18 is reflected by the side of the paper sheet and received again, and the counter 23 inputs the detection signal 81''It to start counting 1, 0, and before counting up the paper sheet. 2 passes through the detector 18, the counter 26 inputs the CLR signal SmTh through the inverter 21, and the counting operation is cleared.Since the count-up signal Ss is not output, the motor 14 is not driven, and the backup board 12
is stacked on the next paper sheet in state 11.

Then, when the edge of the top layer of the sequentially stacked paper sheets passes the detector, the counter 23 inputs the detection signal Sat and performs a counting time. In this case, the detector 18 is continuously interrupted, so the counter 26 outputs the count-up signal Sit without inputting the clear signal S. The drive controller 24 inputs this count-up signal Ssk and outputs a drive control signal to the driver 25 to control the motor 14.
The backup board 12 is moved slightly downward by the drive of the 0 motor which is driven for a predetermined period of time, and the height of the top layer of the stacked paper sheets matches the initial height of the backup board. . Thereafter, similar operations are repeated to sequentially stack paper sheets.

In this way, when stacking paper sheets, the height of the top layer of the stacked paper sheets can be set to the initial height K of the back-up board, so that good paper sheets are guided to the stacking box and are not disturbed. In addition, by narrowing the distance between the backup plate 12 and the detector 18 at the initial height of the backup plate set in advance, and also by outputting one count-up signal Ss, If the drive amount of the motor is reduced, finer control becomes possible.

The above embodiment is just an example, and it goes without saying that each member can be replaced with another member having the same function. For example, an elevator mechanism 16 that moves 12 backup plates.
is not limited to the use of sprockets and chains, but can be replaced with any appropriate means.

Effects of the Invention As is clear from the above explanation, the paper sheet stacking device of the present invention has the following advantages: It is possible to set the height to a desired height, and has excellent effects such as being able to prevent the paper sheets guided to the collection box from being disturbed or piled up.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of a conventionally used paper sheet stacking device, Fig. 2 is a detailed explanatory diagram of the same device O stacking box, and Fig. 3 is an implementation of the paper sheet stacking device of the present invention. FIG. 4 is a schematic perspective view showing an example; FIG. 4 is a block diagram showing the control unit of the same device; Detector, 20...control unit, A.
...Conveyance direction of paper products.

Claims (1)

[Claims] The stacking boxes installed along the paper transport direction and the paper sheets guided to the paper stacking box are loaded and stacked, and the height of the top layer of the stacked paper sheets is A mounting plate that can be moved in the stacking direction of paper sheets according to the stacking direction, a detector that detects the height of the top layer of paper sheets stacked on this mounting plate, and an output of this detector. A control unit for controlling the movement of the placement plate based on the above-mentioned information so that the height of the uppermost layer of paper sheets reaches a desired height.