JPH0647863Y2 - Single sheet takeout device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a single paper sheet take-out device for taking out collected paper sheets one by one, and is particularly suitable for sorting works such as mail. Kind of single take-out device.

[Conventional technology]

Conventionally, a single sheet take-out device presses paper sheets accumulated on a substrate in an upright position along the accumulation direction,
A pressing transfer means for transferring and a paper sheet one-out feeding means which is arranged at a transfer destination of the accumulated paper sheets and sequentially sends out the paper sheets one by one as a picking direction of the paper sheets in a direction substantially perpendicular to the stacking direction. And a photoelectric sensor for detecting the presence or absence of a paper sheet from the side in the vicinity of the one-sheet one-sheet feeding means.

Among them, the paper sheet one-by-one feeding means is, specifically, at this time, the carry-out belt portion provided with the first suction device for paper sheet extraction and the paper sheet to be next extracted. It is formed by a second adsorber that temporarily adsorbs the paper so that it will not be extracted together with the paper.

The second suction device is arranged upstream of the carry-out belt portion along the paper sheet picking direction. Then, according to the output signal of the photoelectric sensor, the above-mentioned pressing transfer means is drive-controlled by a drive stop control means (not shown).

[Problems to be solved by the device]

In the above-described conventional single-feeding device, the photoelectric sensor that determines the presence or absence of paper sheets often cannot detect the presence of a dark-colored object such as black, which reflects little light.

In particular, in the case of postal items, even if there are postal items, when the postal items with black edges are placed together, a sufficient amount of reflected light does not return to the light receiving unit. A situation occurs in which this cannot be detected. In this case, the pressing operation that acts on the paper sheets is continued. As a result, the accumulated paper sheets transmit an abnormally large pressing force to the paper sheet contact surface of the conveyor belt portion, causing friction between the paper sheets and between the paper sheets and the carry-out belt portion. The force becomes larger than the rotational force of the conveyor belt, which makes it difficult to feed out good paper sheets.

At the same time, there arises a disadvantage that the pressure transfer means for exerting a pressing force on the paper sheets thus accumulated, the discharge belt to which the pressing force is transmitted, and the suction device for adsorbing the paper sheets are damaged. It was

[Purpose of device]

An object of the present invention is to improve the above-mentioned disadvantages of the conventional example and effectively prevent the generation of a large pressing force caused by a misjudgment of a photoelectric sensor even when dark-colored paper sheets are present. An object of the present invention is to provide a single take-out device for paper sheets.

[Means for Solving the Problems]

According to the present invention, the pressing and transferring means for pressing and transferring the stacked paper sheets in the standing position and the transfer destination of the stacked paper sheets, which is arranged at a right angle to the stacking direction. It has a paper sheet one-feeding-out means for sequentially feeding the paper sheets one by one in the direction, and a photoelectric sensor installed near the one paper sheet feeding-out means for detecting the presence or absence of the paper sheets. Among these, the paper sheet single-feeding-out means is a carrying-out belt portion in which a first suction device for paper sheet extraction is arranged, and a second sheet paper sheet to be extracted next time is temporarily adsorbed. The second suction device is formed by the suction device, and the second suction device is arranged on the upstream side in the paper sheet picking direction with respect to the carry-out belt portion, and the pressure transfer operation of the pressure transfer means is performed according to the output signal of the photoelectric sensor. It has means for controlling. Then, the second suction device is disposed so as to project somewhat toward the paper sheet side from the paper sheet contact surface of the carry-out belt portion, and can be reciprocated along the stacking direction of the paper sheet. It is equipped with a switch mechanism that is provided and that operates in conjunction with the movement of the second adsorber and outputs an operation stop signal for the pressure transfer means. This aims to achieve the above-mentioned object.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

The single sheet take-out device according to the present embodiment is configured so as to press and convey paper sheets 1, 1, ... To the transfer destination of the paper sheet 1 in the stacking direction of the paper sheet 1 (direction of arrow P in FIG. 1) in a direction substantially perpendicular (direction of arrow Q in FIG. 1), one sheet at a time It has a means 5 and a photoelectric sensor 6 which is close to the one-sheet feeding means 5 and detects the presence or absence of the sheet 1 from the side.

The single paper sheet sending-out means 5 is a carrying-out belt portion 3 having a first suction device 3A for paper sheet extraction inside thereof, and a second sheet paper sheet 1 to be extracted next. Adsorber 4
It is formed by and. Of these, the second adsorber 4 is
It is arranged on the upstream side (lower side in FIG. 1) in the paper sheet extracting direction P with respect to the carry-out belt portion 3.

Further, the second suction device 4 is disposed so as to project somewhat from the paper sheet contact surface of the carry-out belt portion 3 toward the paper sheet 1 side,
Further, it is equipped so as to be able to reciprocate along the stacking direction P of the paper sheets 1. A switch mechanism 7 is provided which operates in conjunction with the reciprocating operation of the second adsorber 4 and outputs an operation stop signal for the pressure transfer means 2.

More specifically, this is actually a pin-belt-shaped fork used as the pressure transfer means. Further, the carry-out belt portion 3 includes three rollers 3C, 3D, 3E arranged in a triangular shape, and a belt 3B wound around these rollers,
It is formed by the above-described first suction device 3A for sucking the paper sheet 1 from the inside of the wound belt 3B. A so-called vacuum adsorber is actually used as the first adsorber 3A.

Here, the above-mentioned three rollers are one drive roller 3C which is rotated in the arrow R direction by being biased by a drive mechanism (not shown).
, And two guide rollers 3D and 3E, and the belt 3B is provided with a plurality of holes 3f, 3f, ...

Further, the paper sheets 1 accumulated in the vicinity of the carry-out belt portion 3
A reflective photoelectric sensor 6 for detecting the presence / absence of a paper sheet is arranged on the substrate 10 on the side of the substrate 10, facing the edge of the paper sheet. The detection window 11a is provided at a location corresponding to the location where is placed. Here, reference numeral 6A indicates a light emitting portion of the reflective photoelectric sensor 6, and 6B
Indicates a light receiving portion corresponding to the light emitting portion.

Further, on the upstream side of the carry-out belt portion 3 in the extraction direction Q, it is projected to some extent toward the paper sheet side from the contact surface of the carry-out belt portion 3 with the paper sheet 1 (3-5 mm in this embodiment). ) Second placed
The adsorber 4 is provided. As the second suction device 4, a vacuum suction device is actually used, and the stacking direction P of the paper sheets 1 is P.
Is fixed to one end of a pipe 8 extending along the pipe 8. The pipe 8 penetrates the pipe support portion 9 fixed to the substrate 10 described above.

A spring 12 is wound around the outer circumference of the pipe 8 between the pipe support 9 and the second adsorber 4.
As a result, the second adsorber 4 and the pipe 8 mounted integrally with the second adsorber 4 are reciprocated along the stacking direction P of the paper sheets.

A bracket 8A is screwed to the pipe 8, and a switch 7 that forms a part of a switch mechanism that detects a predetermined pressing force when the bracket 8A reciprocates due to the pressing force applied to the paper sheet is provided. It is fixedly provided on the substrate 10.

Here, reference numeral 7A indicates a switch lever provided on the switch, and 13 indicates a hose wound around the pipe 8.

Next, the operation of this embodiment configured as described above will be described.

The paper sheets 1 accumulated on the substrate 10 in the upright position are pressed by the pressing transfer means 2 operated by the driving means (not shown) and transferred in the arrow P direction.

Then, when it is transferred to the paper sheet contact surface of the conveyor belt portion 3 and brought into close contact therewith, it is adsorbed by the action of the first adsorber 3A as shown in FIG.
It is sent in the direction of arrow Q by being urged by the rotational driving force of 3C. At this time, the picking direction (direction of arrow Q) is set so that the paper sheet 1 to be sent out and the adjacent paper sheet 1 are not taken out at the same time.
As described above, the second adsorber 4 is disposed on the upstream side of the. By the second suction device 4, one end side of the above-described next paper sheet 1 is sucked and thereby the simultaneous feeding with the previously fed paper sheet 1 is prevented.

In this case, when there is no paper sheet 1 to be extracted near the conveyor belt unit 3, the light flux output from the light emitting unit 6A of the reflection type photoelectric sensor 6 is not reflected by the paper sheet 1, in other words, the light receiving unit.
No reflected light is detected at 6B. When the output signal from the reflective photoelectric sensor 6 disappears, the drive control unit (not shown) determines that there is no paper sheet, and immediately outputs a drive command to the drive unit for the fork 2 described above. Fork 2
When receiving the signal from the drive control unit, the drive unit for use in the fork 2 moves the paper sheet 1 toward the unloading belt unit 3.
Operate. Then, the reflective photoelectric sensor 6 detects the presence of the paper sheet 1 transferred by the operation of the fork 2 and sends the output signal to a drive control unit (not shown) to stop the movement of the fork 2.

In the same manner, under normal operating conditions, this control process is repeated, whereby the paper sheets 1 are sequentially extracted in the direction of arrow Q and taken out one by one.

Here, when the paper sheets to be taken out one by one are in the dark color system such as the entire surface or the edge portion is black, the accumulated paper sheets 1
When the light is transferred to the carry-out belt unit 3, most of the light output from the light emitting unit 6A of the reflective photoelectric sensor 6 is absorbed by the dark color of the paper sheet, and the reflected light becomes weak. Therefore, a sufficient amount of light for determining the presence or absence of the paper sheet 1 is not incident on the light receiving unit 6B, and as a result, the fork 2 mistakenly detects the paper sheet 1 despite the existence of the paper sheet. A situation occurs in which the paper is sent to the carry-out belt unit 3.

In this embodiment, when a pressing force is applied to the paper sheet 1 in response to such a situation, the pipe supporting portion 9 that penetrates the pipe 8 provided in the second suction device 4 and fixes the pipe 8 is provided. The spring 12 installed between the two is compressed, and at the same time, the pipe 8
The bracket 8A that is integrally provided with
Move in the direction. Then, the bracket 8A pushes the switch lever 7A of the switch 7.

When the pressed switch lever 7A connects the contact of the switch 7, the switch 7 outputs a drive stop signal to the drive stop controller of the fork 2, and the drive stop controller
The pressing operation of the fork 2 is forcibly stopped.

As a result, the pressing force applied to the paper sheet 1 is stopped, and the repulsive force of the spring 12 causes the second suction device to return to its original position. The pressure is reduced, the paper sheet feeding means 5 returns to the normal state, and as a result, the paper sheets 1 are taken out one by one.

[Effect of device]

As described above, according to the present invention, since a switch mechanism for detecting the pressing force that can reciprocate in association with the pressing force applied to the paper sheet is provided, the operation of the switch mechanism causes an abnormality in the paper sheet. It is possible to detect when a large pressing force is applied to, and to stop the pressing operation of the pressing transfer means by the drive control unit that operates in response to this detection signal. An unprecedented practical one-sheet take-out device that can prevent damage due to an abnormally large pressing force that acts on containers and the like, and can take out one good sheet even for dark-colored paper sheets. Can be provided.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Paper sheets, 2 ... Fork, 3 ... Unloading belt part, 3A ... Vacuum adsorption device as a 1st adsorption device, 4 ... Vacuum adsorption device as a 2nd adsorption device, 5 ... Paper sheet one feeding means , 6 ... Reflective photoelectric sensor as photoelectric sensor, 7 ... Switch.

Claims (1)

[Scope of utility model registration request] 1. A pressing transfer means for pressing and transferring the stacked paper sheets in a standing state along a stacking direction, and a pressing transfer means arranged at the transfer destination of the stacked paper sheets and substantially perpendicular to the stacking direction. In the direction of the paper sheet one by one for feeding one by one, and a photoelectric sensor for detecting the presence or absence of the paper sheet, which is provided in the vicinity of the one paper sheet for feeding means, The single leaf feeding means is composed of a carrying-out belt part in which a first suction device for picking paper sheets is arranged inside, and a second suction device for temporarily sucking paper sheets to be picked next time. In addition to forming the second suction device, the second suction device is disposed on the upstream side in the paper sheet extracting direction with respect to the carry-out belt portion, and the pressure transfer operation of the pressure transfer means is performed according to the output signal of the photoelectric sensor. In a single sheet take-out device having a means for controlling, 2 adsorbers, as well as arranged to protrude somewhat towards the paper sheet side of the sheet abutment surface of the unloading belt portion,
A switch mechanism is provided which is reciprocally movable along the stacking direction of the paper sheets and which operates in conjunction with the movement of the second suction device and outputs an operation stop signal for the pressure transfer means. A single sheet take-out device that features