JPH0747393Y2 - Paper sheet feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a paper sheet feeder for processing large paper sheets such as non-standard size mail.

[Prior Art] Conventionally, as shown in FIG. 2, a paper sheet feeder of this type has a main vacuum chamber 25, a sub-vacuum chamber 26, a supply belt 27, and supply rollers 28a, 28a.
It consisted of b and 28c. The paper sheet 39 is sucked by the supply belt 27 by the negative pressure of the main vacuum chamber when the suction hole portion (not shown) of the supply belt 27 coincides with the suction hole (not shown) of the main vacuum chamber 25. It is attached and sent to the transport unit 29 together with the rotation of the supply belt 27.

The sub-vacuum chamber 26 is provided to prevent the two sheets of paper sheets from being taken out, and holds the end of the second sheet of paper sheet 31 by negative pressure during the feeding operation.

Here, the take-out force from the supply belt 27 that acts on the first paper sheet 39 is F1, the frictional force between the first and second paper sheets 39 and 31 is F2, and the second paper is If the holding force by the negative pressure of the auxiliary vacuum chamber 26 that acts on the end of the paper sheet 31 is F3, the following relational expression is used to prevent the paper sheet from being fed in two and to take out the paper sheet reliably. It has to hold.

F ₁ ＞ F ₃ ＞ F ₂ If the negative pressures of the main vacuum chamber 25 and the sub-vacuum chamber 26 are adjusted so that the relational expression holds, it is possible to prevent double feeding of the paper sheets and to reliably remove the paper sheets. You can take it out.

[Problems to be solved by the device]

In the conventional feeder described above, when thick paper sheets, which are often used for large-sized paper such as non-standard size mail, are fed, the end of the second paper article 31 is the sub-vacuum chamber as shown in FIG. Since the thickness T of the first sheet 39 is separated from the sheet 26 from 26, the suction force F3 of the sub vacuum chamber 26 becomes extremely weak. As a result, the above relational expression becomes F ₁
＞ F ₂ ＞ F ₃ and the second paper sheet 31 becomes the first paper sheet 39
There is a drawback that it is taken out together with and becomes two copies.

[Means for Solving the Problems]

The first aspect of the present invention is such that a first belt is brought into contact with a supply belt having an intake hole portion that runs on the surface of the main vacuum chamber provided with the intake holes, and the ends of the supply belts are aligned so as to be along the guide plate. In the paper sheet feeding device that takes out the paper sheets one by one from the paper sheet by the supply belt, the first passage of the paper sheets adsorbed to the supply belt corresponds to the length in the transport direction of the end portion. It is configured to include a sub-vacuum holding mechanism for advancing and holding the second trailing end of the paper sheet by advancing when conveyed by a distance.

〔Example〕

 Hereinafter, the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an embodiment of the present invention. This device
The take-out unit 1 for sucking and taking out the paper sheet 21 by negative pressure, the sub-vacuum holding mechanism 2 for sucking and holding the end of the second paper sheet 24 by negative pressure, and the paper sheet 21 in the standing position It is configured by the transport unit 3 that transports.

The take-out section 1 is a main vacuum chamber 4, a supply belt 5, a supply roller.
It is composed of 6a, 6b and 6c. The supply belt 5 includes supply rollers 6a, 6 driven by a motor (not shown) or the like.
It rotates in the direction of arrow A at a constant speed by b and 6c. Further, intake holes (not shown) are opened in the supply belt 5 at a constant pitch, and for paper sheets, the intake holes (not shown) of the supply belt 5 are provided in the main vacuum chamber 4 (not shown). ), The negative pressure of the main vacuum chamber 4 causes the suction to be sucked by the supply belt 5, and the rotation of the supply belt 5 causes the supply belt 5 to send the feed belt 5 at a constant pitch.

The sub vacuum holding mechanism 2 includes a vacuum pad 7, a spring 8, a slide shaft 9, a vacuum pad mounting bracket 10, a slide shaft support block 11, a connecting bolt 12, a push-pull solenoid 13, an air pipe 14, and an electromagnetic air switching valve 15. It is composed of a vacuum pump (not shown). The sub-vacuum holding mechanism 2 is attached to the substrate by a bracket 16.
A negative pressure is supplied to the vacuum pad 7 via an air pipe 14 and an electromagnetic air switching valve 15 by a vacuum pump (not shown). The vacuum pad 7 is attached to the slide shaft 9 by a vacuum pad mounting bracket 10. The tip of the vacuum pad 7 is made of rubber. The slide shaft 9 is supported by a slide shaft support block 11, and is connected to a push-pull solenoid 13 by a connecting bolt 12. Therefore, the sub vacuum holding mechanism 2 can be moved back and forth in the direction of arrow B by the push-pull solenoid blade 13. Next, a spring 8 is installed between the vacuum pad 7 and the vacuum pad mounting bracket 10 so that when a force is applied to the tip of the vacuum pad 7, it can move in the direction of arrow C.

The transport unit 3 includes transport belts 18a and 18b and transport rollers 19a and 19b.
It is composed of b and 19c.

Further, photoelectric tubes 20a and 20b are installed at positions sandwiching the supply belt 5 in order to detect an intake hole portion (not shown) of the supply belt 5.

The operation of this embodiment will be described below.

The paper sheet 21 has a guide plate 22 at the end by manual or other means.
Are supplied to this supply device so as to be aligned by. The first paper sheet 23 is taken out by the take-out unit 1 by the same take-out operation as the paper sheet feeder shown in FIG. During the main take-out operation, while the end of the first paper sheet 23 is taken out from the guide plate 12 to the distance L (illustrated), the vacuum pad 7 is retracted from the take-out surface E (illustrated) by the push-pull solenoid 13, and Vacuum pad 7
The negative pressure is released to the atmosphere by closing the electromagnetic air switching valve 15. Therefore, the first paper sheet 23 is not blocked by the negative pressure of the vacuum pad 7 and is taken out from the take-out section 11
Can be taken out smoothly.

Next, the end of the first paper sheet 23 is at a distance L from the guide plate 22.
After being taken out (illustrated), the vacuum pad 7 is pushed out by the push-pull solenoid 13 and comes into contact with the end of the second sheet 24 by the pressing force exerted by the spring 8. At this point, the electromagnetic air switching valve 15 is opened to supply a negative pressure to the vacuum pad 7. Therefore, the end of the second paper sheet 24 is securely held by the vacuum pad 7, and when the first paper sheet 23 is taken out, the second paper sheet 24 is taken out together. There is no.

The operation of the push-pull solenoid 13 and the opening / closing timing of the electromagnetic air switching valve 15 are controlled by the delay time after the intake holes (not shown) of the supply belt 5 are detected by the photoelectric tubes 20a and 20b.

The paper sheet 23 smoothly taken out by the take-out section 1 is conveyed by the conveying section 3 in the upright state in the conveying direction D (illustrated).

[Effect of device]

As described above, according to the present invention, the sub-vacuum holding mechanism absorbs and holds the end portion of the second paper sheet in response to the paper sheet take-out operation, so that the thick paper sheet can be removed. Even if the paper is supplied to the present supply device, there is an effect that the paper can be surely supplied without causing double feeding of the paper.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a plan view of a conventional paper sheet feeder. 1 ... Taking out part, 2 ... Sub vacuum holding mechanism, 3 ... Conveying part, 4 ... Main vacuum chamber, 5 ... Supply belt, 7 ... Vacuum pad, 13 ... Push-pull solenoid, 15 ... Electromagnetic Type air switching valve, 23 …… first paper sheet, 24 …… second paper sheet.

Claims (1)

[Scope of utility model registration request] 1. A plurality of a plurality of belts which are brought into contact with a supply belt having an intake hole portion which runs on a surface provided with an intake hole of a main vacuum chamber so that their respective ends are aligned and aligned along a guide plate. In a paper sheet feeding device that takes out the paper sheets one by one from the common paper sheet by the feeding belt, the first paper sheet adsorbed to the feeding belt has a length in the transport direction at the end portion. A paper sheet feeder, comprising a sub-vacuum holding mechanism for advancing and holding the second trailing end of the paper sheet when the paper sheet is conveyed by a corresponding distance.