JPS60202040A - Double feeding removing device - Google Patents

Abstract

PURPOSE:To easily remove the double feeding of sheets of paper due to nipping between two rolls by mounting a retard roll, etc. on a rotatable arm and rotating said roll, etc. only in the direction in which it parts from a feed roll. CONSTITUTION:Sheets of paper 2 piled on a paper feeding table 1 are pressed by a draw-out roll 4 by means of a spring 3. The sheets of paper 2 which are drawn out one at a time by means of the roll 4, are introduced between a feed roll 5 and a friction retard roll 6, where double feeding is prevented, and are further sent forward. The shaft of the roll 6 is supported by one end of a lever 8, whose other end serves as a nip releasing handle 9, while its middle part is rotatably fitted to a roll pressing force adjusting lever 11 by means of a pin 10, and the both levers 8, 11 are drawn toward each other by means of a spring 12. And, by drawing the handle 9 in the arrow direction, the roll 6 is separated from the roll 5, to remove the sheets of paper being doubly fed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double feed removal device for unlocking the device due to double feed that often occurs in a device for dispensing cut sheets, banknotes, etc.

Conventionally, in a device that sequentially feeds paper sheets one by one from a stack of cut sheets, a means for preventing double feeding such as friction retard is provided between the stack of paper sheets and the conveyance path to prevent double feeding of paper sheets. is common.

However, in reality, the occurrence of electric transport cannot be completely prevented due to variations in the surface condition of the rolls, etc. that constitute the above-mentioned double-feed prevention means, variations in the characteristics of the paper sheets to be conveyed, or fluctuations in environmental conditions such as temperature and humidity. If there is a large number of double feeds, the double feed prevention means locks and it is often difficult to release the lock.

The present invention has been made in order to eliminate the drawbacks of the conventional double-feed prevention means as described above, and the component of the double-feed prevention means is a driven roll or a friction roll that presses against the feed roll of filter paper sheets. A retard roll or pad, etc. is attached to a rotary arm, and the arm is rotatable only in the direction opposite to the conveying direction of paper sheets.9 When double feeding occurs, the arm is rotated to connect with the feed roll. It is an object of the present invention to provide a double feed removal device that opens a nib between the friction retard and the like.

Hereinafter, two embodiments of the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing an embodiment of a double feed removal device according to the present invention.

Namely, reference numeral 1 denotes a paper feed tray, on which paper sheets 2 are pressed against a feed roll 4 by a spring 3, and the paper sheets are fed into one sheet by the feed roll 4, which rotates at the appropriate timing. The sheets are fed out one by one and guided to the nip between the feed fist roll 5 and the friction retard roll 6 arranged in front of them, where double feeding is prevented, and further forward they are sent to a paper sheet conveyance path (not shown).

As is well known, the friction retard row/I/6 generally applies a rotational force in the opposite direction to the sheet conveyance direction via a one-way clutch 7 such as a spring clutch to prevent heavy transfer. However, in the present invention, the shaft of this Frixi 11@Retard-Low/l/6 is supported at one end of the lever 8, and the other end is used as the handle 9 for releasing the dip, and the intermediate point thereof is connected to the bottle 10. It is rotatably attached to the retard roll pressing force adjustment lever 11, and the levers 8 and 11 are drawn together by a spring 12.

Furthermore, a pin 13 provided on the lever 11 is used to prevent the angle formed between the two from exceeding a predetermined range.

On the other hand, the retard roll pressing force adjustment lever 11 has one end rotatably attached to a suitable position on the frame 14 with a pin 15, and is attached to a lifting screw 16 for adjusting the retard roll pressing force near the midpoint of the lever 11. The frame 14 is supported by a spring 17 which connects the other end to a proper position on the frame 14 and is tensioned to prevent floating.

As is clear from this figure, in the double feed removal device of the present invention constructed as described above, the pressure contact force between the feed roll 5 and the retard row A/6 is adjusted by changing the height of the lifting screw 16. This is possible, and if the feed roll 1L/4 feeds out a large amount of paper sheets at once and for some reason it enters the nip between the feed roll 5 and the retard roll 6 and becomes locked. When the handle 9 extending from the lever 8 is pulled in the direction of the upper arrow in the gold figure, the retard roll is moved to the position shown by the dotted line in the figure, and the nip between the retard roll and the feed row A15 is opened, thereby removing the double-fed sheets. It will be appreciated that all can be removed quite easily.

9. The present invention is not necessarily limited to the above-mentioned embodiments.
For example, as shown in FIG. 2, even if one roll is used as the feed roll 4 and the feed roll 5 for paper sheets 2,
good.

Furthermore, the handle 9 extending from the lever 8 shown in FIG. You can.

Furthermore, the present invention is not limited to devices that fully utilize friction-retard as a double-feed prevention device; Needless to say, it is applicable to leaf feed systems.

Since the present invention is configured and functions as explained above, it is possible to remove heavy remittances extremely easily with a relatively simple and reliable mechanism, thereby greatly improving the work efficiency of service engineers and handling paper. It is extremely effective in preventing damage to leaves.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the double feed removal device according to the present invention, and FIG. 2 is a partial block diagram showing another embodiment. 2... Paper sheet accumulation, 5... River feed roll, 6... Driven (or friction fist retard) roll, 8... ... Rotatable arm patent applicant Toyo Tsushinki Co., Ltd.

Claims (1)

[Claims] In an apparatus for feeding out paper sheets one by one from a stack of paper sheets to a desired conveyance path through a paper sheet feed roll and a driven roll or a friction retard roll or pad that is in pressure contact with the paper sheet feed roll, the above-mentioned By attaching it to a fully rotatable arm such as a driven or retard roll, and rotating it only in the opposite direction to the sheet conveyance direction with respect to the feed roll, it is possible to open the nip between the two. 1. A double-feed removal device that is capable of easily removing double-feed of paper sheets that occurs in the process.