JPH02300032A - Vacuum suctional and separating device - Google Patents

Abstract

PURPOSE:To separate and move a paper securely by installing a hopper in such a way that the forward end of papers is positioned under a center part of an aperture of a vacuum chamber, and stopping the head of lines of pores in a separation belt at the forward end part of the papers in operation, and controlling the chamber to attract the papers to a drive belt. CONSTITUTION:When the head of lines of pores provided in a separation belt 3 gets to the forward end part of papers 12 deposited in a hopper 19, a drive unit is stopped, and a vacuum chamber 5 attracts the uppermost one of the deposited papers 12 through the pores 4 in the separation belt 3. At this time, a current of compressed air from a main jet port 9 provided in a compressed air filled chamber 7 separates an upper part of the papers 12 deposited in the hopper, an up current of compressed air from an up jet port 10 collides with a front part of the separation belt 3 having no pores 4 to flow back, and flow between the attracted paper 12 and the paper 12 just under it is increased to separate the paper 12.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vacuum adsorption separation device for paper sheets, and in particular, a device for vacuum adsorption and separation of paper sheets, which is capable of adsorbing and sending a plurality of paper sheets from piled up sheets in a stacked state. This invention relates to a vacuum adsorption separation device that prevents double feeding and enables highly reliable separation of individual sheets.

Conventional devices are disclosed in Japanese Patent Application Laid-open Nos. 11843-1983 and 1982-11843,
As described in JP-A-11844 and JP-A-62-11845, paper sheets are suctioned and adsorbed over the entire surface of a chamber controlled to negative pressure via a belt having a row of holes. The front end of the paper sheet was positioned forward from the end of the chamber. Moreover, in order to easily separate one sheet of paper, a part of the blowing nozzle that sends air toward the paper sheets is directed toward the front end of the paper sheets that are attracted to the belt.

Unlike the above-mentioned method of suctioning the topmost sheet, when separating the bottom sheet, the conventional device is disclosed in Japanese Patent Application Laid-Open No. 62-931.
As described in Japanese Patent Application No. 30, the structure was the same as that of the conventional example in which the uppermost sheet is separated.

[Problem to be solved by the invention]

The above-mentioned conventional technology uses ribs provided between vertically divided belts and claws provided on the hopper to prevent problems such as double feeding of multiple sheets of paper and syspick, which fails to pick up paper sheets. etc., and no consideration was given to the fact that the reliability of the device would decrease depending on the rigidity and thickness of the paper sheets, and there were problems in separating a wide range of paper sheets, especially cardboard. Ta.

In addition, the air flow rate from the blowout nozzle and the suction pressure of the chamber cannot be set independently.In other words, when the flow rate from the blowout nozzle is increased, the air from the blowout nozzle is removed from the front end of the paper sheet attracted to the chamber. There were problems such as inability to absorb and transport.

The purpose of the present invention is to provide a vacuum adsorption separation device that can reliably separate paper sheets one by one using airflow from a blow-off nozzle without providing ribs or claws to prevent double feeding or mispink. It is about providing.

[Means to solve the problem]

In order to achieve the above object, the vacuum adsorption separation device of the present invention includes a hopper for depositing paper sheets, and a separation belt that moves directly above the paper sheets and has an aperture row.

a drive device that drives the separation belt; a vacuum chamber installed above the hopper with its suction port facing the top surface of the separation belt; and a hopper lifting bag that moves the top surface of the paper sheets to a fixed position; In a vacuum adsorption separation device comprising a compressed air-filled chamber that sends an air flow from the front of the paper sheets, the hopper is installed so that the leading end of the paper sheets is located below the center of the opening of the vacuum chamber. The present invention is characterized in that during operation, the leading edge of the row of holes in the separation belt stops at the leading edge of the paper sheet, and the chamber is controlled so that the drive belt attracts the paper sheet.

Further, the main nozzle of the compressed air charger sends compressed air to the upper tip of the paper sheets to separate the paper sheets, and
The present invention is characterized in that an upward nozzle blows an air stream upward to a portion of the separation belt that has no holes in front of the row of holes.

[Effect]

When the beginning of the row of holes provided in the separation belt reaches the leading edge of the paper sheets (hereinafter referred to as paper) accumulated in the hopper, the active device stops and the vacuum chamber moves through the holes in the separation belt to remove the accumulated paper sheets. Suction the top piece of paper. At this time, the compressed air flow from the main nozzle installed in the compressed air filling chamber separates the upper part of the paper stacked in the hopper, and the upward compressed air flow from the upward nozzle separates the portion in front of the separating belt without holes. The paper collides with the paper and flows backward, increasing the flow rate between the attracted paper and the paper directly below it, thereby separating the paper.

The adsorption of the paper onto the separation belt is zero and continues until the separation belt is driven again and the adsorbed paper moves to a position where it is no longer affected by the upward compressed air flow of the auxiliary jet. When the paper is attracted to the separation belt and conveyed, the hopper lifting device pushes up the hopper and places the top surface of the paper in a fixed position.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 1 is a schematic diagram of a vacuum adsorption separation apparatus according to an embodiment of the present invention.

The sheets 12 are stacked in a hopper 19, and the upper end of the sheets 12 is detected by a sheet upper end sensor 13 for position detection, and is always positioned at a fixed position by an elevator (not shown) that raises and lowers the sheets 12. .

An endless separation belt 3 having apertures 4 for adsorbing and conveying one piece of the positioned paper 1'[2]
It is stretched by a drive pulley 1 and a driven pulley 2 which are rotatably supported in parallel to each other on a side plate 15 located laterally, and is driven and rotated by a drive motor 14 connected to the drive pulley 1.

The separation belt 3 is provided with openings 4 arranged in the width direction, for example, around half the circumference of the separation belt 3.

This separation belt 3 is moved by a floating motor 14 to separate the paper 12.
The separation belt 3 is controlled by a control device (not shown) so that it rotates once per sheet of paper, and the positional relationship is kept constant so that the front row of the openings 3 always stops at the front end of the paper 12 when the separation belt 3 stops. Operate.

A vacuum chamber 5, which is set to a negative pressure to suck air through the opening 4, is installed so that its lower surface is open and covered by the separation belt 3 from above and below. A suction conduit 6 is connected to the side surface of the vacuum chamber 5, and suction is carried out by a suction blower 17 through the suction conduit 6.

A compressed air chamber 7 is installed on the downstream side in the transport direction of the sheets 12 stacked in the hopper 19, and handles the upper sheets 12. Here, separating the sheets refers to blowing an air stream to separate the leading edges of the sheets to reduce friction between the sheets. This compressed air filling chamber 7 is connected to another blower 18 by a blowing conduit 8 .

The suction blower 17 and the blow-out blower 18 are installed in a part separated from the separation section where the separation belt 3, the vacuum chamber, etc. are provided, and measures for noise reduction and vibration prevention are taken. Moreover, the suction blower 17 and the blow-off blower 18 may be constituted by one blower.

Next, the positional relationship among the separation belt 3, the aperture 4, the paper 12, and the compressed air chamber 7, and the control method will be described in detail with reference to FIGS. 2 to 7.

FIG. 2 shows the initial state before the separation operation for separating one sheet from the stacked sheets 12 is started.

The hopper 19 and the vacuum chamber 5 are installed so that the front end of the sheets 12 deposited in the hopper 19 is located below the center of the opening of the vacuum chamber 5. A separation belt 3 is stretched between an active pulley 1 and a driven pulley 2 so as to cover the top and bottom of a vacuum chamber 5. The front end of openings 4 arranged in the width direction about half the circumference of the separation belt 3 is connected to a hopper. Paper 12 in 19
The position is controlled so that it stops at a position slightly behind the front end (point A in the figure).

On the other hand, a compressed air filling chamber 7 which has the function of separating and floating the paper 12 by air flow, which is located at the upper part of the hopper 19,
It is arranged in front of the hopper 12. This compressed air filling chamber 7 includes a main spout 9 that outputs an air flow in a horizontal direction toward the paper 12 at the top of the hopper, and an opening 4 in the area in front of the paper 12 where the vacuum chamber 5 has a suction effect. An upward jet nozzle 1o for discharging air to the part of the separation belt 3 that is not covered by the sheet 12, and an auxiliary jet nozzle 1 facing diagonally upward which has the function of floating the paper on the upper part of the paper 12 and also sorting the paper are provided. There is.

3 to 7 show the process of separating the paper 12 and transporting it to a downstream transport means (not shown).

FIG. 3 shows a state in which the upper part of the paper sheets 12 stacked in the hopper 19 is being spread by the air flow from each of the ejection ports 9, 10.11. When the paper 12 is separated and floated, the topmost paper is sucked through the opening 4 by the negative pressure of the vacuum chamber 5 . At this time, since the leading edge of the paper is attracted by the front row of openings 4 at point A, it is not affected by the air flow from the upward jet outlet 10.

On the other hand, for the second and subsequent sheets of paper from the top, the upward spout 10
The air flow from the top paper separates it from the top paper and pushes it downward.

FIG. 4 shows the state immediately after the separation belt 3 is rotated. As the separation belt 3 rotates, the pressure of the air flow from the upward jet nozzle 10 increases, but since the leading edge of the paper is firmly attracted by the openings 4, it will not slip between the attracted paper and the separation belt 3. does not occur.

FIG. 5 shows the state when the one-separation belt 3 rotates further. In the state of the paper and the separation belt shown in FIGS. 3 and 4, the paper 12 is not attracted to the separation belt 3 in the part of the separation belt 3 where no holes 4 are present between the pitches of the holes 4, so that the paper 12 is ejected upward. A portion of the airflow from outlet 10 enters. Therefore, the amount of air flowing between the paper adsorbed by the separation belt 3 and the paper directly below it is reduced, and the air layer is in a thin state.

When the paper is conveyed to the state shown in FIG. 5, the flow rate of air that enters between the paper adsorbed by the separation belt 3 and the paper immediately below it increases, so that the air layer becomes thicker and good separation becomes possible.

FIG. 6 shows the state when the paper is further conveyed forward. Such good separation is maintained until the top sheet is completely removed from the hopper 19 and the front end of the aperture 4 reaches the top of the sheet 12 again.

FIG. 7 shows the state when the separation belt 3 rotates and the aperture 4 reaches the paper 12 in the hopper 19 again. When the aperture 4 reaches the vacuum chamber 5, the topmost sheet of paper is lifted up, but until the front edge of the sheet is sucked, 1
Since an air layer is formed between the separation belt 3 and the lifted paper, the paper and the separation belt 3 are slipping. That is, the paper remains in place within the hopper.

Finally, the separation belt 3 stops at point A, and the front row of apertures 4 attracts the front edge of the paper.

The above cycle is repeated to separate the sheets one by one.

〔Effect of the invention〕

According to the present invention, in the vacuum adsorption separation device, the head of the perforation row of the separation belt stops at the leading end of the accumulated paper sheets;
The vacuum chamber adsorbs the top sheet of paper onto the separation belt, while the main nozzle of the compressed air chamber sends compressed air from the top edge of the paper to separate the paper and assist. Since the nozzle blows air upward into the part of the separation belt that has no holes in front of the row of holes, a large air layer is created between the sheets that are attracted to the separation belt and the sheets directly below it. This has the effect of reliably separating and moving paper sheets one by one.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of an embodiment of the present invention, Figures 2 to 7
The figures are cross-sectional views sequentially showing the state of separation of paper sheets by the vacuum adsorption separation device of the embodiment. 3... Separation belt, 4... Hole, 5...
Vacuum chamber, 7... Compressed air filling chamber, 9... Main spout, 10
...Upward spout, 11...Auxiliary spout, 1
2...Paper. 13...Paper top edge sensor, 19...Hopper.

Claims (1)

[Scope of Claims] 1. A hopper for depositing paper sheets, a separation belt that moves directly above the paper sheets and has a row of perforations, a drive device that drives the separation belt, and a drive device that drives the separation belt; a vacuum chamber installed above the hopper with the suction port facing; a hopper lifting device for moving the upper surface of the paper sheets to a fixed position; and a compressed air filling chamber for sending an air flow from in front of the paper sheets. In the vacuum adsorption separation device, the hopper is installed such that the leading edge of the paper sheet is located below the center of the opening of the vacuum chamber, and during operation, the leading edge of the row of holes in the separation belt 1. A vacuum adsorption separation device, characterized in that the vacuum adsorption separation device is controlled so that the chamber stops at the leading end of the leaves, and the chamber adsorbs the paper sheets to the drive belt. 2. In the apparatus according to claim 1, the main nozzle of the compressed air filling chamber sends compressed air to the upper tip of the paper sheet to separate the paper sheets, and the upward nozzle separates the paper sheets from the openings of the separation belt. A vacuum adsorption separation device characterized by blowing air upward into a portion without openings at the front of the row.