JPH0546126Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a device for preventing paper sheets from returning after being turned over in a paper sheet counting machine.

(Prior Art) Conventionally, as a counting machine that automatically counts the number of various paper sheets including banknotes, paper sheets are held in a paper sheet holding mechanism by a suction head that is installed on a rotating disk and rotates and revolves. Paper sheets are separated one by one from a group of leaves and counted. At the same time, when separating by suction, a light emitter projects light onto the next sheet surface, and the reflected light of the projected light is received by a light receiver. Some devices are designed to detect different denominations of banknotes, to distinguish between front and back, or to identify damaged banknotes based on the properties of the surface of the paper sheet, such as patterns and colors.

(Problem to be solved by the invention) However, in the above-mentioned counting machine, when the paper sheet that is attracted to the suction head and turned up is released from the suction head, it becomes unrestrained, and the next sheet of paper It tries to return to the suction head side, which attracts the objects. As a result, the detection range of the light emitter/receiver that attempts to detect the properties of the next paper sheet is significantly narrowed, and erroneous detection is likely to occur due to this. That is, normally, when it is determined that the properties of the paper sheets are abnormal based on the above detection results, the stopper is operated to press and hold the unadsorbed paper sheets, thereby preventing the suction head from carrying out the suction separation operation.

Therefore, if the above-mentioned erroneous detection occurs, even if the paper sheet is normal, the suction and separation operation may be stopped as it is an abnormal paper sheet, or even if the paper sheet has abnormal properties. The adsorption/separation operation continues regardless, and the paper sheets are treated as normal paper sheets. This poses a problem that, for example, although only 100 banknotes of a predetermined denomination are counted, banknotes of different denominations end up being mixed.

In view of this, the present invention has been designed to prevent paper sheets that have been separated by suction from returning to the suction head side that picks up the next sheet, so as not to interfere with the detection of the properties of paper sheets by transmitting and receiving light. The purpose of this invention is to provide a device for preventing paper sheets from returning when turned over for a paper sheet counting machine.

[Structure of the idea]

(Means for solving the problems) In order to solve the problems of the above-mentioned conventional technology,
The present invention uses a suction head that is installed on a rotating disk and rotates and revolves to separate and count paper sheets one by one from a group of paper sheets held in a paper sheet holding mechanism. In the paper sheet counting machine, the light is projected onto the next paper sheet surface using a projector, and the reflected light of the projected light is received by a light receiver to detect the properties of the paper sheet surface. A return prevention part is provided to prevent paper sheets separated by the suction head from returning to the side of the suction head for suctioning and separating the next sheet next to the leading edge of the paper sheet when it leaves the suction head. It is characterized by this.

(Function) With the above configuration, the paper sheets that are attracted to one suction head and turned up are restrained from moving in the return direction by the return prevention part, and the paper sheets that are attracted and separated by the next suction head are restrained from moving in the return direction. without obstructing the light path to the
Light is emitted and received reliably, and erroneous detection is prevented.

(Embodiments) The present invention will be described below with reference to embodiments shown in the drawings.

The illustrated embodiment shows a case in which the present invention is applied to a counting machine for banknotes P. A holding mechanism 1 that holds a group of banknotes P has a holder 2, and this holder 2 has a holder at a right angle thereto at the bottom. It has a plate 3, and is designed to be pivoted around a pivot shaft (not shown) between the illustrated position and a retracted position to the left.

The banknotes P set on the holder plate 3 are held between the holding rod 4 and the side plate 5 of the holder 2 when the banknotes P are turned to the illustrated position. Number 6 in the figure
is a guide plate that regulates the position of the tip of the banknote P.

A plurality of suction heads 7, 7... are rotatably arranged in an annular manner on a rotary disk 9 that rotates in the direction of the arrow in FIG. 1 about a shaft 8. The first drive mechanism (not shown)
While rotating in the direction of the arrow in the figure, negative pressure is introduced at a predetermined time to attract banknotes P through suction holes opened in the suction surface.

In the figure, reference numeral 10 is a light emitter, and 11 is a light receiver. The light emitting optical path 12 from the light emitter 10 is arranged so as to illuminate the range from the detection position Q to R of the banknote P, and the light receiver 11 is arranged from the detection position Q to the light receiver 11. It is arranged at a position to receive reflected light in the range R.

When the above-mentioned projector and receiver 10, 11 are used to detect the property of the banknote P, for example, a banknote of a different denomination, a solenoid (not shown) is energized by the detection of the different denomination, and the stopper 13 is actuated. It is designed to prevent the different denomination banknotes from being attracted and separated by the suction head 7 by contacting the banknote P in the forefront of the P group, that is, the banknote detected as a banknote of a different denomination. At the time of this detection, the rotation of the counter itself, that is, the rotation of the rotary disk 9 and the rotation of the suction heads 7, 7, . . . are also stopped at the same time.

The device for preventing paper sheets from returning in the present invention is as follows:
It consists of a banknote return prevention section 14 provided on the rotary disk 9. In the illustrated embodiment, the return prevention section 14 is provided around the shaft 8 of the rotation disk 9, and the suction heads 7, 7... The same number of projecting arms 15, 15... project from the central boss portion 16 at equal intervals in the radial direction, and these projecting arms 15, 15...
is located between each suction head 7, 7... and extends to a position where the tip of the banknote P can come into contact with it.

At the tip of this projecting arm 15, a surface 15a on which the tip of the banknote P turned over by the suction head 7 comes into contact is an inclined surface, and a back surface 15b is flat, and the tip of the banknote P is on the surface 15a. It has become familiar and accepted.

Next, the operation of the above embodiment will be explained.

When a banknote P is loaded into the holder 2 of the holding mechanism 1,
A detection switch (not shown) detects that a banknote is loaded into a normal position, rotates the holder 2, and displaces the banknote P to a position where it hits the suction head 7.

Next, the counting mechanism starts operating, and the banknotes P count by 1 due to the rotation of the suction heads 7, 7, etc. and the revolution of the suction heads 7, 7, etc. due to the rotation of the rotary disk 9.
Counting is performed by separating the sheets by adsorption and turning them over one after another. Counting by this counting mechanism includes counting by detecting a detection piece provided around the rotary disk 9 as the rotary disk 9 rotates, as well as counting by detecting the banknotes themselves to be attracted and separated. When counting the banknotes themselves, the banknotes may be counted either before or after they leave the suction head 7, but either method is acceptable.

FIG. 3 shows a state in which the suction head ₇₁ has been rotated by an angle θ, and the next suction head ₇₂ is in the pre-suction stage and is ready to suction the next banknote when it reaches the position of line L. . Then, the banknote _P1 , which is attracted to the preceding suction head ₇₁ , tries to return to its natural position as shown by the chain line in the same figure due to the release of the vacuum pressure. That is, when the bill P ₁ that has been attracted to the suction head 7 ₁ moves to return to its natural position due to the release of the vacuum pressure, the tip of this bill P ₁ moves along the surface 15 a of one of the projecting arms 15 of the return prevention section 14 . be placed. This allows the subsequent suction head 7
_2, and does not obstruct the light emission, light emission by the light receivers 10 and 11, and light reception optical paths 12 and 12a, and a wide range of the surface of the banknote P becomes the discrimination target area, making it possible to perform accurate discrimination. can.

In the illustrated example, the return prevention part 14 in the present invention is constructed by fixing to the rotary disk 9 a member having projecting arms 15, 15, the same number as the suction heads 7, 7, projecting around the boss part 16. As shown above, this can be done either by making the number of the protruding arms 15, 15... smaller than the suction heads 7, 7... to rotate faster than the rotary disk, or by increasing the number of the protruding arms 15, 15... than the suction heads 7, 7. ...The number may be increased to rotate slower than the rotary disk 9.

On the other hand, as illustrated in FIG. 4, rod-shaped projecting arms 15', 15', etc. are provided upright on the upper surface of the rotary disk 9 in correspondence with the respective suction heads 7, 7,... can do.

Note that the paper sheets to be handled are not limited to banknotes, but may be other paper sheets.

[Effect of idea]

As explained above, according to the present invention, the leading edge of the paper sheet that has been suctioned and separated by the suction head engages with the return prevention part and is prevented from returning to the next suction head. , it is possible to target a wide area of the surface of the paper sheet for discrimination without obstructing the optical path when the light receiver is used to discriminate the properties of paper sheets. The reliability of the counting machine can be significantly improved.

[Brief explanation of drawings]

Figure 1 is a plan view showing one embodiment of the present invention;
The figure is the same side view, and Figure 3 is a plan view showing the operating state.
FIG. 4 is a schematic plan view showing another example of the return prevention part. DESCRIPTION OF SYMBOLS 1... Holding mechanism, 2... Holder, 7... Suction head, 9... Rotating disk, 10... Light emitter, 1
1... Light receiver, 14... Return prevention part, 15, 1
5'... Protruding arm.

Claims (1)

[Scope of utility model registration request] The suction head, which is installed on a rotating disk and rotates on its axis, separates paper sheets one by one from the group of paper sheets held in the paper sheet holding mechanism and counts them. In a paper sheet counting machine that projects light onto the next paper sheet surface and detects the properties of the paper sheet surface by receiving the reflected light of the projected light with a light receiver, the paper sheet is sucked by the suction head. The paper sheet is characterized by being provided with a return prevention part that prevents the separated paper sheet from returning to the suction head side which adsorbs and separates the next paper sheet at the leading end when the separated paper sheet leaves the suction head. A device to prevent paper sheets from turning over and returning to paper sheet counters.