JPH03216426A - Paper sheet separating device - Google Patents

Abstract

PURPOSE:To enable non-regulation of a pressure contact force between rollers by locating a soft high friction factor member, on which a press force is exerted by means of a spring force and which is brought into opposite contact by means of a specified pressure, in a position where the high friction factor member roller is positioned facing a low friction factor member roller serving as a frictional resistance means. CONSTITUTION:A paper sheet separating device is provided with a pickup roller 13a brought into contact with a sheet group P to deliver a sheet at a frontmost part and a metallic roller 12a located on the downstream of the pickup roller and provided on a surface with a coarse surface part 60 to separate and convey sheets one by one. A roller 48 having the same size as that of the metallic roller 12a and having an outer periphery formed of a high friction factor member is provided. Further, a gate roller 14 pressed against the outer peripheral surface of the metallic roller 12a through the proper force of a spring 53 to prohibit rotation in a sheet conveying direction and having an outer periphery formed of a high friction factor member is provided in a position where the gate roller is positioned facing the metallic roller 12a and forms a pressure contact separation resistance part. Further, a friction factor between the metallic roller 48 and a sheet is set to a value lower than a friction factor between the sheets, and a condition to separate sheets one by one without fail is kept.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for separating paper sheets, such as an automatic teller machine, in which banknotes stored in a hopper are separated and conveyed one by one. Regarding equipment.

[Conventional technology]

As described in Japanese Unexamined Patent Application Publication No. 56-99139, the conventional device separates paper sheets in a separating section consisting of a feed roller that sends out paper sheets and a gate roller that is in pressure contact with the feed roller and serves as a filter paper separation means. When separating sheets, a large slipping speed is generated between the gate roller and the sheets.

[Problem to be solved by the invention]

In the above conventional technology, paper dust and printing ink from the paper sheets adhere to the roller surface of the gate roller as a paper sheet separation means from the paper sheet side when separating the paper sheets, so the number of sheets separated is As the amount increases, the friction coefficient on the gate roller surface gradually changes and decreases, making it impossible to maintain the initial stable separation conditions.

The purpose of the present invention is to solve the problem of paper sheets regardless of their rigidity and thickness;
The object of the present invention is to provide a long-term stable and highly reliable paper sheet separation device that prevents a decrease in the coefficient of friction on the gate roller surface, which is important for maintaining separation conditions.

[Means to solve the problem]

The above purpose is to provide a pick-up roller that comes into contact with a group of paper sheets to reel out the frontmost paper, and a rotating shaft that separates and transports paper sheets one by one downstream from the pick-up roller, which has a rough surface on its surface. A metal roller and a roller next to the metal roller are provided with a roller having the same diameter as the metal roller and whose outer periphery is made of a material with a high friction coefficient. A gate roller whose outer periphery is made of a material with a high friction coefficient and which is pressed by a force and does not rotate in the filter paper sheet conveying direction is provided as a press separation resistance section, and the friction coefficient between the metal roller and the paper sheet is adjusted to This is achieved by setting the friction coefficient of the leaf to be smaller than the friction coefficient between the paper leaf and the gate roller, always maintaining single-sheet separation conditions, and removing deposits on the gate roller surface using the rough surface of the metal roller. .

[Effect]

With the above configuration, the sheet separation condition is determined by the difference in the friction coefficient between the gate roller and the metal roller and the spring force of the gate roller, so it is not affected by the eccentricity of the metal roller, there is no wear on the metal roller, and the friction coefficient of the surface of the gate roller is determined. can be kept constant due to the cleaning effect of the rough surface of the metal roller.
It is possible to realize a paper sheet separation device that is stable over a long period of time without any adjustment.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 and 2 show the main structure of the paper sheet separation device. The feed roller shaft 50 has a low friction coefficient member (for example, a metal material such as an aluminum roller or a SUS roller, or a low friction coefficient member made of plastic or high hardness urethane rubber) on the circumference of the roller. A roller 12a having a rough surface part 60 on a part of the upper part thereof, which is made rougher than the circumferential surface of the roller (e.g., grooves, knurls, etc.)
Next to the roller 12a, a feed roller 48 made of a material with a high friction coefficient (such as rubber) is provided on the circumference of the roller and has the same outer diameter as the roller 12a, and a guide roller 47 is provided outside of the feed roller 48. A timing pulley 43 provided on the feed roller shaft 50 is provided to transmit rotation to the timing pulley 43 of the pick-up roller shaft 49 via a timing belt 44. A pick-up roller 13a is provided on the big-up roller shaft 49, and this roller has the following features:
A high friction coefficient member 46a is provided in a part, and when this part comes into contact with the paper sheet, a sufficient conveying force can be produced.

Here, the rough surface portion 60 provided on the roller 12a is in a phase in which the tip of the high friction coefficient member 46a of the pickup roller comes into opposing contact with the gate roller 14, which will be described later, immediately before sending out the paper sheet. The gate roller 14 is made of a high friction coefficient member and a soft material, and the support member 52
roller 12a by suitable tension of spring 53 through
Note that the gate roller 14 does not rotate in the conveying direction, but can rotate in the opposite direction via a one-way clutch to avoid wear on the same portion. The pinch roller 42 is the feed roller 48
and the spring 40 at the other end of the support member 41
The tension force causes the feed roller 48 to come into pressure contact with the feed roller 48. The front plate 37 and the gate roller guide 39 function as sheet guides, and the push plate 16 receives a pressing force from a spring 38 to press the sheet group P against the pickup roller 13a. Next, the operation of this embodiment will be explained using FIGS. 1 and 2. First, in FIG. 1, a pickup roller shaft 49 and a feed roller shaft 50 are driven by a motor (not shown). Pick up roller 1
The high friction coefficient member 46a of 3a feeds the frontmost sheet of the sheet group P to a press-contact/separation resistance section comprised of a gate roller 14 and a roller 12a located below. In this press separation resistance section, the friction coefficient between the roller 12a and the sheet is set to be smaller than the friction coefficient between the sheets and the friction coefficient between the sheet and the gate roller 14, so that the sheet is always separated into one sheet. This is the condition for The paper sheet separated into one sheet can be reliably conveyed by the pinching force of the pinch roller 42 and feed roller 48 provided downstream. Even if two or more sheets of paper enter the press separation resistance section, the gate roller 14 will be greatly opened due to the deformation of the gate roller 14 made of soft material and the bow tension of the spring 53. It is possible to prevent this and prevent double feeding. Furthermore, even if the thickness of the paper sheets differs, it is always possible to separate one sheet from the difference in the coefficient of friction as described above, and the cooperation between the deformation of the gate roller 14 and the tensile force of the spring 53 ensures stable separation. It becomes possible to separate the sheets. In this dividing operation, the pressure separation resistor section described above
One side of the sheet is sent downstream while contacting the high friction coefficient member 46a of the pickup roller 13a and the roller 12a, but the other side is sliding against the stationary gate roller 14, so at this time, The deposits on the paper surface (e.g. ink, fibers of the paper itself, etc.) are scraped off and the gate roller 1
It adheres to the surface of 4. However, each time a sheet of paper is separated, the rough surface 60 provided on a portion of the roller 12a described above always passes over the surface of the gate roller 14 and removes these deposits. It becomes possible to maintain stable single-sheet separation conditions for a long period of time without reducing the coefficient of friction on the surface of 14.

FIGS. 3(a) and 3(b) show an embodiment of the rough surface portion 6o. FIG. 3(a) shows how the grooves of the rough surface portion 60 are formed by the roller 12.
(b) is another example in which knurling grooves are provided on the surface of the groove (a) in the axial direction. Further, as shown in FIG. 4, just before the tip of the high friction coefficient member 46a of the pick-up roller 13a serving as a sheet feeding means sends out the sheet, the rough surface portion 60 comes into opposing contact with the gate roller 14. However, an example is shown in which the surface of the gate roller 14 is cleaned during idle operation, such as when starting the apparatus when no paper sheets are stored in the storage section or when recovering from a failure. Even at the position of the rough surface portion 60 shown in FIG. 1, there is a cleaning effect on the surface of the gate roller 14 similar to the embodiment shown in FIG. 4 during idle operation when no paper sheets are stored in the storage section. Needless to say. Here, if the rough surface portion 60 has grooves and is a high friction coefficient member, contact with the gate roller 14 may cause significant wear on both.
It is generally known that problems such as sudden torque fluctuations occur.

〔Effect of the invention〕

According to the present invention, the paper sheet separation conditions are such that the roller 12a, the paper sheet,
It is determined by the difference in the friction coefficient of each high friction coefficient roller 14, the amount of deformation of the high friction coefficient roller 14, and the spring force, and
Since the friction coefficient of the high friction coefficient roller 14 is always kept constant by the polishing effect of the rough surface part 60 provided on the roller 12a, it is not affected by the eccentricity of each roller, and changes over time can be prevented by replacing only the high friction coefficient roller 14. is easy, and the roller 12a and feed roller 12a attached to the feed roller shaft 5o
can be simplified, and the pressure contact force between the gate roller 14 and the roller 12a can also be made unnecessary. In this embodiment, the gate roller 14 is shaped like a roller, but the same effect can be obtained by pressing a rubber pad or the like with a spring.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
3 is a perspective view of an embodiment of the rough surface portion provided on the roller, and FIG. 4 is a side view of the embodiment in which the position of the rough surface portion is different from that in FIG. 1. 12a...Roller, 13a...Pick-up roller, 14...Gate roller, 16...Press plate, 42...
・Pinch roller, 48...Feed roller, 60...
・Rough surface area.

Claims (1)

[Claims] 1. A feeding means that is disposed opposite to one side of the paper sheets accumulated in the storage section and rotates to feed out the paper sheets, and a feeding device that feeds out the paper sheets in cooperation with the rotation of the feeding means of the storage section. means, facing the delivery means at a pressure,
A paper sheet comprising a separation resistance means for separating the paper sheets one by one by applying a frictional resistance force to the paper sheets being sent out, and for sequentially separating and taking out the accumulated paper sheets one by one from the storage section. In the leaf separation device, a roller made of a low friction coefficient material such as metal is used as the feeding means, and the width of the roller is set at a part of the circumference of the roller at a position earlier than the feeding phase of the high friction coefficient member of the feeding means. A rough surface portion with a shallow groove shape is provided in the direction, and on the same axis near the low friction coefficient member roller, a paper sheet of the high friction coefficient member is buckled on the outer periphery with the same outer diameter as the low friction coefficient member roller. A delivery roller is provided, and as a friction resistance means, a soft high friction coefficient member roller is applied with a pressing force by a spring force at a position facing the low friction coefficient member roller and is brought into contact with the low friction coefficient member roller at a constant pressure. A paper sheet separating device characterized in that the paper sheet separating device is provided to separate the paper sheets one by one.