JPH0241720Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention detects magnetic patterns printed with magnetic ink on banknotes fed into a banknote discriminator.
This relates to a magnetic detection device for a banknote discriminator that uses a magnetic head to detect the authenticity, type, etc. of banknotes, and specifically relates to a support structure for a positioning roller placed opposite the magnetic head. It is.

"Prior Art" Conventionally, as an example of a magnetic detection device for a banknote discriminator, one described in Japanese Patent Application Laid-Open No. 53-46798 has been known. In this device, a head roller is pivotally supported on a fixed rotating shaft provided on a fixed frame, and a swinging block is swingably supported on a pivot pin that is removably installed on the fixed frame. The magnetic head is attached with a set screw to a head holder which is attached to the block so that its position can be adjusted, the magnetic head is pressed against the head roller by a pressing spring attached to the swinging block, and a stopper piece having a buffering function is provided. A stopper mechanism is provided in which adjustment screws facing the stopper piece are connected to the head holder and the fixed frame separately, respectively, and a gap smaller than the thickness of the paper sheet is maintained between the magnetic head and the head roller when no paper sheet is detected. The banknotes are conveyed between a head roller and a magnetic head, and the paper sheets conveyed along the conveyance path are sandwiched between the magnetic head and a head roller disposed opposite to the magnetic head. The banknote is brought into close contact with the magnetic head so that the banknote is detected by the magnetic head.

``Problem that the invention seeks to solve'' However, in the conventional magnetic detection device of such a banknote discriminator, the distance between the head roller whose position is fixed and the magnetic head whose position is adjustable is large. If the thickness is smaller than the thickness of the stopper mechanism, there is a risk that the tip of the bill will collide with the magnetic head when the bill passes, and the impact force will become noise and be mixed into the detection signal of the magnetic head. A spring, cushion, stopper piece, etc., which has a buffering function is provided in the stopper mechanism.If the gap is too wide, there is a risk that the banknotes will flap and the recognition accuracy will be reduced, so the stopper mechanism moves the magnetic head to the head roller. The position of the magnetic head is adjustable in the direction facing the magnetic head. Generally, between the magnetic head and the head roller, a first gauge plate, which has a thickness equivalent to that of a banknote, and a second gauge plate, which has a thickness slightly larger than that of a banknote, are arranged alternately. the first gauge plate so that there is no resistance in the case of the first gauge plate, and there is resistance in the case of the second gauge plate.
The distance between the head roller and the magnetic head is adjusted by turning an adjustment screw.

However, in the conventional magnetic detection device,
In order to swing the magnetic head and adjust the distance between the head roller and the magnetic head, a large number of swing blocks, head holders, mounting pieces, pressing springs, sponge rubber cushions, screw washers, stopper pieces, etc. are used. The parts must be made and assembled,
As there are many parts, it takes time to assemble.
This requires a large installation space, increases manufacturing costs, and requires adjusting and fixing the position of the magnetic head via the head holder with a lock screw, and then adjusting and fixing the distance between the head roller and the magnetic head using an adjusting screw, which makes operation difficult. There was a problem with bad sex.

The present invention solves the above-mentioned problems of the magnetic detection device of the conventional banknote validating machine, requires a small number of parts, is easy to assemble, does not require manufacturing cost, and requires only one adjustment screw. It is an object of the present invention to provide a magnetic detection device for a banknote discriminating machine with good operability, which can appropriately adjust the distance between a magnetic head and a positioning roller by only adjusting the positioning roller.

"Means for Solving the Problems" The present invention has the following configuration in order to achieve the above object. That is, a magnetic head for identification and detection is provided at a position facing a conveyance path that conveys banknotes at a required speed, and a magnetic head is provided at a position facing the magnetic head across the conveyance path so that the position can be adjusted in the opposing direction. A magnetic detection device for a banknote discriminator, which is equipped with a positioning roller driven at a circumferential speed approximately equal to the feed speed of the magnetic head and the positioning roller, and which discriminates a banknote passing between the magnetic head and the positioning roller. A slide block is provided on the block so as to be movable and adjustable in a direction perpendicular to the traveling direction of the banknotes, a positioning roller is pivotally supported on the slide block via a one-way clutch, and the positioning roller is rotated via the one-way clutch. It has a configuration in which a drive source is connected.

"Operation" Power is transmitted from the drive source to the positioning roller disposed opposite the magnetic head via a one-way clutch, and when the drive source is stopped, the drive source and the positioning roller The load from the power transmission means does not act on the positioning roller, and the positioning roller can be rotated freely without removing the drive source or transmission means, making it easy to adjust between the positioning roller and the magnetic head. This makes it possible to perform the process quickly and accurately.

That is, when the drive source is activated, the positioning roller is driven via the one-way clutch, but when the drive source is stopped, the positioning roller is free to rotate. Therefore, as an adjustment operation, first stop the drive source, and then rotate the positioning roller by hand to adjust the distance between the magnetic head and the positioning roller. A first gauge plate having a thickness equivalent to that of a banknote and a second gauge plate having a thickness slightly larger than that of a banknote are inserted alternately,
In the case of the first gauge plate, there is no resistance, and in the case of the second gauge plate, there is no resistance.
In the case of a gauge plate, the position of the positioning roller can be adjusted simply by turning the adjustment screw, which provides good operability.

In addition, since the positioning roller is moved via a slide block, one-way clutch, etc. by adjusting the adjustment screw, the number of parts is small and the configuration is simple and low-cost, making it possible to easily and accurately adjust the distance. This makes the device more compact.

"Embodiments" Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows the main parts of a banknote discriminator to which an embodiment of the present invention is applied.

This banknote discriminator is equipped with a pair of conveyance rollers 3, 3 serving as conveyance means at appropriate intervals on a conveyance path 2 formed by a pair of guide plates 1, and rotates these conveyance rollers 3, 3 to detect banknotes. 4 is conveyed, and the banknote 4 being conveyed is discriminated by the magnetic detection device 5.

The magnetic detection device 5 is arranged at a position facing the magnetic head 6 facing the conveyance path 2 and the magnetic head 6 across the conveyance path 2, and rotates at the same circumferential speed as the conveyance roller 3. It consists of a driven positioning roller 7.

As shown in FIG. 2, the positioning roller 7 has a roller center shaft 7a which receives a driving force and is fitted and held in a bearing 9 via a one-way clutch 8, and the bearing 9 is supported by a slide block 10. . This slide block 10 is rotatably provided with an adjustment screw 11 at one end (the upper end in FIG. 2), and the other end is slidably fitted into a guide groove 12a formed in the frame 12 of the banknote validator. Together, they are supported so as to be movable in the direction facing the magnetic head 6 (up and down in FIGS. 1 and 2), and the adjustment screw 11 is screwed into a fixing block 13 screwed to the frame 12. At the same time, the roller 7 is positioned in a direction facing the magnetic head 6, and the position of the roller 7 can be adjusted by turning the adjustment screw 11.

The one-way clutch 8 has a cam groove 15 on the inner periphery of a ring-shaped main body 14 that fits around the roller center shaft 7a.
The roller 16 housed in the cam groove 15 is moved in one direction (the cam groove 15
The main body 14 is biased in a direction where the depth becomes shallower (counterclockwise in this figure)
In this case, rotational force is transmitted clockwise in FIG. 3 from a drive source (not shown) via an appropriate transmission mechanism.

As shown in FIG. 3, when the main body 14 is about to rotate clockwise with respect to the roller central axis 7a, such a one-way clutch 8 is configured to connect the main body 14 and the roller central axis 7a via the rollers 16. are connected,
Both rotate together, but when the roller center shaft 7a tries to rotate clockwise relative to the main body 14 as shown in FIG. 4, the roller 16 moves toward the spring 18 side and rotates with the center shaft 7a. No longer in contact, main body 1
4 and the roller center shaft 7a are separated, and only the roller center shaft 7a rotates.

In other words, when the drive source is activated, the positioning roller 7 is driven via the one-way clutch 8, but when the drive source is stopped, the positioning roller 7 is driven clockwise in FIG. It is now in a state where it can freely rotate (counterclockwise in FIG. 1). Therefore, to adjust the distance between the magnetic head 6 and the positioning roller 7, first stop the drive source, and then rotate the positioning roller 7 with your finger (clockwise in FIG. 3). Between the magnetic head 6 and the positioning roller 7 〓D, there is a first gauge plate having the same thickness (=t) as the banknote 4, and a banknote 4.
A second gauge plate having a slightly larger thickness is inserted alternately. Then, it is only necessary to adjust the position of the roller 7 by turning the adjusting screw 11 so that there is no resistance in the case of the first gauge plate, and resistance occurs in the case of the second gauge plate. Therefore, the number of parts is small, the structure is simple, the cost is low, there is no use of parts that deteriorate over time, the adjustment can be easily and accurately performed, and the device is compact.

In addition, in FIG. 5, the belt 1 is attached to the positioning roller 7.
9, and the bill 4 to be discriminated is sent out by the belt 19. In this case, the distance between the belt 19 and the magnetic head 6 is set to be the same as D in FIG. It is only necessary to make adjustments, and the supporting structure of the roller 7 in this case is also similar to that of the previous embodiment.

Further, in the above embodiment, the positioning roller 7 is directly fixed to the roller center shaft 7a, but the positioning roller 7 and the roller center shaft 7a are separated, and the positioning roller 7 is attached to the main body 14 of the one-way clutch 8. It is also possible to fix the roller to the roller center shaft 7a and receive power from a drive source on the roller center shaft 7a side.

"Effects of the Invention" As explained above, the magnetic detection device of this invention is configured to transmit power to the positioning roller disposed opposite the magnetic head via a one-way clutch. When activated, the positioning roller can be driven via the one-way clutch, and when the drive source that drives the positioning roller is stopped, the load from the drive source and transmission means is applied to the positioning roller. The positioning roller can be rotated freely without any action. That is, when the drive source is stopped, the engagement between the drive source and the positioning roller is released by the action of the clutch, so that the load from the drive source and the transmission means does not act on the positioning roller, and the positioning roller is allowed to rotate freely. While rotating the positioning roller by hand, a first gauge plate having a thickness equivalent to that of a banknote and a first gauge plate having a thickness slightly larger than a banknote are placed between the magnetic head and the positioning roller. The positioning roller can be adjusted by simply turning the adjustment screw so that the second gauge plate and the second gauge plate are inserted alternately so that there is no resistance in the case of the first gauge plate and resistance in the case of the second gauge plate. The position can be adjusted, and there is no need to remove the belt or other transmission means to disconnect the positioning roller from its drive source, making it easy to adjust the position between the positioning roller and the magnetic head. can be done.

In addition, a slide block is provided on the fixed block fixed to the frame body so as to be movable and adjustable in a direction perpendicular to the traveling direction of the banknote, and the positioning roller is pivotally supported on the slide block via a one-way clutch. , the number of parts is small, the structure is simple, the cost is low, the operability is good, the device is compact, there is no need for parts that deteriorate over time after adjustment, and there is no need for unnecessary force due to attachment of the transmission means, etc. Since the adjustment value is not adjusted, there will be less deviation in the adjustment value, and the adjustment can be made more accurately.

[Brief explanation of the drawing]

Fig. 1 is a structural explanatory diagram showing an embodiment of this invention, Fig. 2 is a structural explanatory diagram of the main parts in Fig. 1,
3 and 4 are explanatory diagrams of a one-way clutch used in one embodiment, respectively, and FIG. 5 is a structural diagram showing another embodiment of this invention. 2... Conveyance path, 3... Conveyance roller, 4... Banknote, 5... Magnetic detection device, 6... Magnetic head, 7
...Positioning roller, 7a...Roller center axis, 8
... One-way clutch, 9 ... Bearing, 10 ... Slide block, 11 ... Adjustment screw, 12 ... Frame, 13 ... Fixed block, 14 ... Main body.

Claims (1)

[Scope of utility model registration request] A magnetic head for identification and detection is provided at a position facing a conveyance path for feeding banknotes at a required speed, and a magnetic head is provided at a position facing the magnetic head across the conveyance path so that the position can be adjusted in the opposite direction, and the head is configured to feed banknotes. In a magnetic detection device for a banknote discriminator, which is equipped with a positioning roller driven at a circumferential speed approximately equal to the magnetic head and the positioning roller, and which discriminates a banknote passing between the magnetic head and the positioning roller, a fixed block fixed to a frame body ,
A slide block is provided so as to be movable and adjustable in a direction perpendicular to the traveling direction of the banknotes, a positioning roller is pivotally supported on the slide block via a one-way clutch, and a rotational drive source is connected to the positioning roller via the one-way clutch. A magnetic detection device for a banknote validating machine, characterized in that: