JPS6316667Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a sheet feeding device for a sheet counting machine, and in particular, it is possible to draw out and convey sheets at a constant speed of the drawing roller regardless of the circumferential speed of the sheet feeding roller. The present invention relates to new improvements to achieve this.

In this type of sheet feeding device that has been used conventionally, a pair of first rollers on the feeding roller shaft are
Since the second feeding roller provided between the feeding rollers is fixed to the feeding roller shaft, both the first and second feeding rollers are fixed to the feeding roller shaft and are integrally provided. The speed of the separated and fed paper sheets is not determined by the constant speed of the pull-out roller;
Because the paper sheet is conveyed with the brake applied due to the circumferential speed of the feed roller, the conveyance speed of the sheet is not constant, making it difficult for the detection unit to accurately detect abnormalities in the sheet conveyance state. It was difficult to do.

The purpose of the present invention is to provide an extremely effective means for quickly eliminating the above-mentioned drawbacks.In particular, the present invention aims to provide an extremely effective means for quickly eliminating the above-mentioned drawbacks. A feed-out roller is provided, and a second feed-out roller is provided between these feed-out rollers via one clutch on the feed-out roller shaft, and when a sheet of paper is fed out by the first and second feed-out rollers, one end of the sheet of paper The sheet is drawn out at a constant speed of the drawing roller while in contact with the smooth surface of the feeding roller without being restricted by the circumferential speed of the first feeding roller.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a sheet feeding device for a sheet counting machine according to the present invention will be described in detail with reference to the drawings.

In the drawings, reference numeral 1 indicates the bottom plate of a hopper for stacking paper sheets, and near the lower end of the hopper bottom plate 1 there is a main body (not shown).
A pair of first feed-out rollers 3 and 4 are fixedly provided at a distance from each other on a feed-out roller shaft 2 which is rotatably provided. Each of the first feeding rollers 3 and 4 has a first friction surface 5 on its circumferential surface made of a material having a large frictional force such as rubber;
The first friction surface 5 is composed of a smooth surface 6 having a smaller frictional force than the first friction surface 5, and the length of the first friction surface 5 in the circumferential direction is shorter than the length of the sheet in the conveying direction. Further, a second feeding roller 7 is provided between each of the first feeding rollers 3 and 4 of the feeding roller shaft 2 via a clutch 8 on one side. 2 is configured to be free in the sheet feeding direction (direction of arrow A) and locked in the opposite direction, and its outer peripheral surface has a first friction surface made of the same material as the first friction surface 5 over the entire circumference. It is formed of two friction surfaces 9. A pair of separation rollers 1 are located near both ends of the second feed roller 7.
0 and 11 are arranged so that they can rotate in the same direction as the first and second feed rollers 3, 4 and 7 so as to separate paper sheets (the drive shaft is not shown). A paper receiving plate 12 is disposed vertically in the vicinity of each of the separation rollers 10 and 11, that is, in front of the sheet feeding direction. Toward the left side position, a first guide plate 13 whose entire structure is bent into a substantially J-shape is disposed, and
A second guide plate 14 having almost the same shape as the first guide plate 13 is disposed on the flat part 13a of the first guide plate 13.
As shown in FIG. 2, they are arranged at a predetermined distance B from the first guide plate 13, and paper sheets are guided and conveyed within this distance B. A light emitting body 16 and a light receiving body 17 constituting a paper sheet detector 15 are disposed at the ends of the first guide plate 13 and the second guide plate 14 on the downstream side with respect to the paper sheet conveyance direction. A pair of pull-out rollers 1 are provided on the downstream side adjacent to the container 15.
8 and 19 are provided so as to be rotatable in the direction indicated by the arrow.

As shown in FIG. 2, a pinch roller 22 rotatably provided on one end of a lever 21 rotatably supported by a support shaft 20 is in contact with the outer circumferential portion of the second feed roller 7. At the other end of 21,
A spring 23 is tensioned so that the pinch roller 22 fully contacts the second feed roller 7.

In the above configuration, when the paper sheet feeding device of the paper sheet counting machine according to the present invention is operated, the paper sheets (not shown) stacked on the hopper bottom plate 1 are transferred to the first feeding rollers 3 and 4.
When the first friction surface 5 of the sheet comes into contact with the sheet, it cooperates with the separating rollers 10 and 11 to separate and feed out the sheets one by one. When the leading edge of the paper sheet reaches the position of the pinch roller 22, the paper sheet is sandwiched between the friction surface 9 of the second feed roller 7 and the pinch roller 22, and is continuously fed out further. When the rear half of the paper sheet reaches the position where it contacts the smooth surface 6 of the first feed rollers 3, 4, the leading end of the paper sheet touches each guide plate 13, 14.
, and is forcibly pulled out by the pull-out rollers 18 and 19, which rotate at a constant speed faster than the circumferential speed of the feed-out roller, and at this time, the second feed-out roller 7 is freed in the direction of arrow A by the action of the clutch 8. Therefore, the first feeding roller 3,
4, and the speed of the paper sheet when it passes through the paper sheet detection unit 15 is not restricted at all by the circumferential speed of the first feed-out rollers 3 and 4; Since the rollers 7 have no braking action, the rollers 18 and 19 are transported at a constant speed that is approximately equal to the circumferential speed of the rollers 18 and 19.

Since the paper sheet feeding device of the paper sheet counting machine according to the present invention has the above-described structure and operation, it is not restricted at all by the operation of the feeding roller.
Only the circumferential speed of the pull-out roller allows the paper sheet to pass through the paper sheet detector at a constant speed, making it possible to accurately detect abnormalities in the paper conveyance state in the paper sheet detection section. , which can significantly improve the reliability of paper sheet counting machines.

[Brief explanation of the drawing]

The drawings show a sheet feeding device for a sheet counting machine according to the present invention, and FIG. 1 is a perspective view showing the overall configuration, and FIG. 2 is a side view of FIG. 1. 1 is the hopper bottom plate, 2 is the feeding roller shaft,
3 and 4 are first feeding rollers, 5 is a first friction surface,
6 is a smooth surface, 7 is a second feeding roller, 8 is one clutch, 9 is a second friction surface, 10, 11 are separation rollers, 12 is a paper receiving plate, 13 is a first guide plate, 13a is a flat part, 14 is the second guide plate, 15 is the paper sheet detector,
18 and 19 are pull-out rollers, 20 is a support shaft, 21 is a lever, 22 is a pinch roller, and 23 is a spring.

Claims (1)

[Scope of utility model registration request] In a hopper configured to separate paper sheets one by one and stack them in a feeding stacker, a part of the circumferential surface is a first friction surface with a large frictional force, and the remaining circumferential surface is a first friction surface with a large frictional force. Between a feeding roller shaft in which a pair of first feeding rollers having a sliding surface with a frictional force smaller than that of the first frictional surface are spaced apart from each other in the axial direction, and the first feeding roller on the feeding roller shaft. a second feeding roller having a second friction surface that is attached to the roller and is made of a material having approximately the same frictional force as the first friction surface over the entire circumferential surface; the feeding roller shaft and the second feeding roller; one clutch provided coaxially between the two clutches and configured to be free in the paper sheet feeding direction and locked in the opposite direction; and a pair of pull-out rollers disposed on the paper sheet feeding side of the second feeding roller. and, while the fed paper sheet is in contact with the smooth surface of the first feeding roller, the paper sheet is pulled out by each drawing roller at a constant speed that is not restricted by the circumferential speed of the first feeding roller. A paper sheet feeding device for a paper sheet counting machine, characterized in that it is configured as follows.