JPS6279157A - Paper sheet stacker - Google Patents

Abstract

PURPOSE:To find early a defective reception of paper sheets by providing a paper leaf detecting means for detecting the paper sheets with an optical axis to monitor the proximity of a blade groove for receiving the paper sheets. CONSTITUTION:Paper sheets P issued out of an impeller 15 will move along the outer periphery of the impeller 15 with at most the delivering speed of the paper sheet P. Then, the paper sheets P will intercept an optical axis S1 until the tail end of the paper sheet reaches the optical axis (time t2') after the leading end of same reaches the optical axis S1 (time t1'). Thus,the output condition of a light receiving element 40B becomes 'dark' over a passage time T2 corresponding to the transfer length of the paper leaf. This time T2 is sufficiently longer than the 'dark' time in the normal transfer so that abnormalities in the transfer can be securely detected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet stacking device that stacks banknotes and the like using an impeller.

[Technical background of the invention and its problems] An example of this type of paper sheet stacking device is shown in FIG. In the same figure, this paper sheet stacking device is equipped with a plurality of blades 1 on a peripheral wall, and includes an impeller 3 that rotates by receiving paper sheets P in a blade groove 2 formed by adjacent blades 1, 1, and Paper sheets PS are transported from the impeller 3 by extending one end into the rotation area of the wheel 3.
: A guide part 4 that separates and guides the fall, and this guide part 4
It is composed of a stacking receiving plate 5 that collects paper sheets P@8 layers that are guided to fall. Note that 6 is a conveyance path for conveying and supplying paper sheets P into the blade groove 2 of the impeller 3.

By the way, in this type of stacking device, is it common that the timing of paper sheet discharge from the conveyance path 6 and the rotational position of the blade groove 2 that receives the paper sheets are synchronized? , paper sheets P due to trade, conveyance pitch unevenness, etc.
may not enter the blade groove 2 and end up hitting the blade 1. In this case, due to the difference between the delivery speed of the paper sheet P and the rotational speed of the impeller 3, the paper sheet P1 shown in FIG. 11 often flies out of the blade. ing.

The sensor 7 that detects the paper sheet P1 that has flown out in this way is arranged as shown in FIGS. 10 and 11. Since it was detected after it had fallen off, there were various negative effects on V who had discovered Shurei Tatsujo early.

1 Objective of the Invention 1 The present invention has been made in view of the above-mentioned circumstances. The purpose of the present invention is to provide a paper sheet stacking device for collecting paper sheets.

;Summary of the Inventionj The outline of the present invention for achieving the above object is as follows:
82 paper sheet detection means for detecting paper sheets having an optical axis that passes through the conveyance width portion of the paper sheet near the outer periphery of the impeller and reaches the other side of the rotary conveyance path; If the paper sheet is accepted into the blade groove, the optical axis is blocked by the paper sheet for a short period of time, and if it is not accepted by the blade groove, the optical axis is blocked by the conveyance length of the paper sheet. The present invention is characterized in that it is constructed so as to detect accumulations in this way.

[Embodiments of the invention] Hereinafter, the present invention will be explained with reference to illustrated embodiments.

FIG. 1 is a front view of a paper sheet stacking device according to the present invention, and FIG. 2 is a sectional view of the same device.

In each figure, d3 and 10.10 are a pair of conveyor belts that convey paper sheets P while holding them therein, and rollers 1 and 10 respectively.
1.12, it is stretched endlessly. The roller 12 is placed in the rotation area of the impeller 15.15 at a position away from the impeller 15.15, which will be described later.
Supported by 3. This conveyor belt 10.10
During the conveyance of paper sheets P, the first sensor 14
(This is used for counting the paper sheets P and for synchronous rotation of the impeller 15.15.

At the discharge end of the conveyor belt 10.10, a pair of impellers 15.15 are provided, which are arranged at an interval narrower than the width of the paper sheet P, as shown in FIG. This feather @1
5.15 is a device in which a plurality of blades 17 are formed on the peripheral wall of the rotating shaft portion 16, and a blade groove 1 is formed between adjacent blades 17.17.
It has 8.

Additionally, a second sensor 23 is installed outside the rotation path of the impeller 15, which detects the timing of the impeller 17.
[Uyo] It's going well. Then, each time the first sensor detects the leading edge of the paper sheet P, the second sensor 9
-23 controls the impeller driving motor by obtaining a signal for detecting the blade timing, so that the blade groove 18 of the impeller 15.15 receives the paper sheet P at the optimum position.

Further, a guide portion '+A is located within the rotation area of the impellers 15 and 15 and at a position away from the impellers 15 and 15.
30 is formed, and the side wall 31 or C is disposed opposite to the guide member 30 at a distance equal to or longer than one general feeding length of the paper sheet P.
) is being kicked.

A stacking receiving plate 32 is provided between the guide member 30 and the side wall 31 as a stacking section that stacks paper sheets P and is movable up and down.

Next, a third step detects a defect in receiving the paper sheet P into the wing tRf418. The fourth sensor 40.4.1 will be explained.

The third sensor 40 is an example of paper sheet detection means required as a characteristic feature of the present invention. This third sensor 40 is
It is constructed by arranging a light emitting element 40A and a light receiving element 40B facing each other. And this light emitting element 40A,
The light-receiving element 40B is connected to the optical axis S1 from diagonally above one side of the rotary conveyance path of the paper sheet (point A in FIG. Part preferably, during conveyance, it passes through the central part (point B in FIG. 2) and reaches the other side of the rotary conveyance path (point C in FIG. 2).

On the other hand, the fourth sensor 41 has a light emitting element 41A, which has an optical axis S2 in a direction substantially perpendicular to the rotation shaft portion 16 of the impeller 15 and outside the outer periphery of the impeller 15.
It is constructed by arranging light receiving elements 4'lB facing each other.

Detection of the transport state of paper sheets P in the apparatus configured as described above will be described.

First, the case where the paper sheet P is normally received in the blade groove 18 will be described with reference to FIGS. 3(A>, (B) to 7).

The paper sheets P that are generally taken out from the conveyor belts 10, 10 are received in the blade grooves 18 of the impellers 15 and 15, and are sent to the bells 1-1.
The rotation speed is reduced to that of the impeller 15 only when the trailing end of the paper sheet P is removed from the nip portion. And time t1
In this case, as shown in Fig. 3 (A>, (B)), the paper sheet P does not reach the optical axis S1, so it is not blocked by the optical axis S1, and the light receiving element IB remains "bright". It is.

Thereafter, when the impeller 15 rotates and reaches time t2, the fourth impeller 15 rotates.
The state shown in Figures <A) and (B) is reached. At this time, as shown in Figure 4 (
As shown in A>, when the paper sheet P is fed from the side, the leading edge of the paper sheet P (needle line part in Fig. 4 (B)) is projected beyond the light @S1, but the optical axis S1 is located at that part. Since the light 441S1 passes above the light 441S1, it is not blocked. Therefore, even at time t2, the light receiving element 40B remains "bright".

The impeller 15 further rotates, and at time t3, as shown in FIG.
A>, the state shown in (B) is reached. At this time, the 11 injured end side of the paper sheet P passes through the passing point B of the optical axis S1 (near the outer periphery of the impeller 15 and approximately at the center of the transport l of the paper sheet P). . This passing time g is only a short time, and only during this time the light receiving element becomes 10B or "dark".

Then, at the subsequent time t4, FIG. 6 (A>, (
As shown in B), paper sheets P are light I! ! Since the light receiving element 40B does not block the light 51, the light receiving element 40B maintains "brightness".
This means waiting for the next paper sheet P to pass.

Incidentally, the output state of the light receiving element 40B from time 11 to time t4 described above is shown in FIG. 7. In the figure, the output is "88".
The time T14 is a short time.

Next, regarding the detection of paper sheets when paper sheets P or U (f, in fact, are not accepted into the blade groove 18, FIG. 8 <A>, (
This will be explained with reference to B) and FIG.

As shown in FIG. 8(A), the paper sheets P ejected from the impeller 15 move around the outer periphery of the impeller 15 at the same speed as or less than the delivery speed of the paper sheets P.

At this time, after the leading edge of the paper sheet P reaches the optical axis S1 (time 11'), when the trailing edge of the sheet P passes the optical axis S1 (time t2-), the paper sheet P reaches the optical axis. This will block S1. Therefore, the output state of the light-receiving element 40B is "dark" over the passage time T2 of 1 (a) of paper sheets P as shown in FIG.

This @ interval T2 corresponds to the above-mentioned normal “rFIaJ
Since the time is sufficiently longer than the time when , transport abnormalities can be reliably detected. Note that in the state shown in FIG. 4 (A>), the fourth sensor 41 cannot detect the light @S2.
Since it takes a considerable amount of time to interrupt the flow, the third sensor 40 can detect conveyance abnormalities at an early stage.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention. In the above embodiment, the optical axis S1 is provided from the upper right to the lower left, or
It goes without saying that the same effect can be obtained by placing the optical axis S1 from the upper left to the lower right, and if the optical axis S1 is crossed from both directions and monitored, it is possible to detect abnormalities more clearly. I can do it.

[Effects of the Invention 1] As explained above, according to the present invention, paper sheets are detected by the optical axis passing through the blade groove, so the length of the paper sheet can be reduced by 1 (0) depending on the length of time the optical axis is blocked. It is possible to accurately detect abnormal conditions, and it is also possible to discover abnormal conditions earlier than with conventional devices.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of a paper sheet stacking device according to the present invention, FIG. 2 is a side view of the same device, and FIG. 3 (△). (B) to Figure 6 (A) and (B) respectively show the respective states during normal conveyance of paper sheets, each figure (A) is its front view, each figure (B') iJ, its The side view and FIG. 7 are sensor output state diagrams during normal conveyance of paper sheets, and FIGS. 8(A) and (B) are front views, side views, and FIG. Figure 9 shows the output state of the sensor during normal transportation, Figure 10 is a front view of the conventional device, and Figure 11 shows the abnormality detection state of the same device! 1! ! FIG. 15...Impeller, 17...Blade, 18...Blade groove, 40...Paper sheets (technical means. Agent Patent attorney 111 Nori Chika Same as 1)
Norio Ogo (A) Figure 4 (A) Figure 5 Kuku○ Dimension Figure 9 ti' ↑4 □ New Figure 2 Figure 10

Claims (1)

[Claims] In a paper sheet stacking device that has a plurality of blades on a peripheral wall and has an impeller that receives and rotates and conveys paper sheets in a blade structure formed between adjacent blades, the paper sheet stacking device accumulates paper sheets. Paper sheets are detected by having an optical axis that extends from diagonally above one side of the rotary conveyance path, passes through the conveyance width portion of the paper sheets near the outer periphery of the impeller, and reaches the other side of the rotary conveyance path. A paper sheet stacking device characterized by being provided with a leaf detection means.