JPH02167402A - Device for detecting thickness of paper sheet - Google Patents

Abstract

PURPOSE:To easily widen a space between a reference roller and a detection roller and to easily recover an initial pressed state by providing the reference roller, the detection roller and a crank lever. CONSTITUTION:When a conveyed bill is fed between the reference roller 3 and the detection roller 4, the roller 4 is displaced in an up-and-down direction according to the thickness of the bill. The displacement quantity is detected by a thickness sensor 23 through the structural member 20a of a spring member 21. By turning the crank lever 43 clockwise and moving a guiding plate 40 downward, a pressing block 38 is pressed toward the roller 3 and it is pressed and energized more even if the leading edge of a main body block 35 is made to abut on a stopper 37. Then, a pin 39 moves upward along the long hole 40a of the guiding plate 40 and the gap between the blocks 35 and 38 is narrowed, and pressing force in accordance with the above effect is added to the block 35. The pressing force acts so as to let the force which is applied on the roller 4 escape. Moreover, the pressing force applied on the block 38 is released by turning the lever 43 counterclockwise.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Field of Application) The present invention is directed to a paper money inspection device that detects the thickness of a bill being conveyed during transportation, for example, in a bill inspection device that inspects bills one by one. This invention relates to a leaf thickness detection device.

(Prior Art) Conventionally, as this type of thickness detecting device, those shown in FIGS. 3 and 4 have been considered. That is, the detection roller 4, which is a detection member, is mechanically brought into contact with the reference roller 3, which is a measurement part, and the detection roller 4 is pivotally supported by the free end (tip) of a spring member 5, which is an elastic support member.
Furthermore, the other end of this spring member 5 is supported by a main body block 7 which is rotatably supported on a shaft 6, and this main body block 7 is a compression spring whose one end is fixed to a completely fixed part 8 of the main body of the apparatus. 9, the detection roller 4 is always pressed against the reference straw 3 in a direction in which it comes into contact with the reference straw 3, and its suppressing rotation range is regulated by a fulcrum 10.

By passing a banknote P conveyed at high speed by a conveyance belt (not shown) or the like between the reference roller 3 and the detection roller 4, the detection roller 4 moves up and down according to the thickness of the banknote P passing through. is detected by the thickness sensor 11, and the movement of the main body block 7, which seesaws when the thickness of the banknote P is large, is detected by the block sensor 12, and the thickness of the banknote P is measured based on the results of both detections. It has become.

That is, the spring constant of the compression spring 9 that presses the main body block 7 is sufficiently smaller than the spring constant of the spring member 5 that supports the detection roller 4, as shown in FIG.
When the thickness of the banknote P sent by a conveyor belt (not shown) is sufficiently small, such as for one sheet, the main body block 7
is suppressed and fixed at the fulcrum 10, and as shown in FIG. 4, when the thickness is large such as when a plurality of stacked bills P, It rotates with the center as a reference and is swingable so as to move in the direction to release the force applied to the detection roller 4, and the thickness of one banknote is detected by the thickness sensor 11, and the thickness of a single banknote is detected by the thickness sensor 11. When a banknote that is thicker than a single banknote, such as one with tape or the like stuck to it, is sent, the block sensor 12 detects it, and as shown in FIG. 5, the outputs A, B, and C and the output B-C- of the block sensor 12 are obtained respectively, and their sum (A) is obtained.

The thickness can be measured by (B+B-) and (C+C-).

As described above, the detection roller has a very high transport speed of the banknotes P, and the use of the spring member 5 with a very high spring constant in order to respond sensitively to minute changes in thickness due to the passage of the banknotes P. By providing a buffering means using the compression spring 9 described above, the strong impact received by the detection roller 4 is softened, and damage to the detection roller 4 is prevented even when, for example, stacked banknotes P and P are continuously fed. It is something that can be done.

However, in the conventional thickness detecting device as described above, for example, when a severely damaged banknote P is sent, the reference roller 3
If the bill P cannot resist the pressing force between it and the detection roller 4 and becomes jammed, and it becomes necessary to remove the bill P, or if dirt adheres to the surface of the detection roller 4 and the thickness sensor 1 If an abnormality occurs in the output of the paper and it becomes necessary to clean the detection roller 4, it is necessary to widen the space between the reference roller 3 and the detection roller 4 and perform the work of removing the banknote P or cleaning the detection roller 4. There is. However, even though the pressing force of the compression spring 9 only resists the pressing force of the spring member 5 corresponding to the thickness of one banknote, it is extremely difficult to apply when a plurality of detection rollers 4 are disposed on the main body block 7. This becomes a large object and becomes a major hindrance during the work of removing the banknotes P and cleaning the detection roller 4 as described above, and it is necessary to perform complicated adjustment work to return to the original state after the above work. (Nobu Izuma, which the invention aims to solve) The present invention is useful in cases where paper sheets become jammed between the measuring section and the sensing member, or when the surface of the sensing member If dirt adheres to the measuring part, it is necessary to widen the space between the measuring part and the sensing member to remove paper sheets or clean it, but if the pressure between the measuring part and the sensing member is large This was done to solve the problem that this is a major hindrance to the above-mentioned paper leaf removal work or cleaning work, and that it requires complicated adjustment work after the above-mentioned work and is poor in maintainability. The present invention is characterized by providing a sheet thickness detecting device which can easily widen the space between the measuring part and the detecting member, and which can be easily returned to the original pressed state and has excellent maintainability. The paper sheet thickness detecting device of the present invention includes a measuring section that serves as a reference for measuring the thickness of paper sheets being conveyed, a detecting member that mechanically contacts this measuring section, and a control of this detecting section. an elastic support member that elastically supports the paper, and detects the movement of the detection unit that moves according to the thickness of the paper when the paper passes between the measurement unit and the detection member. a detecting means for converting into an electric signal; a support supporting the elastic support member and the detecting means and disposed movably in the thickness direction of the paper sheet passing through the measuring section; The present invention is characterized by comprising a positioning means for positioning the support by restricting a movement range of the support, and a locking means for locking the support positioned by the positioning means.

(Function) The present invention provides an elastic support member that supports a detection member that mechanically contacts the measurement unit through which paper sheets are conveyed, and a detection means that detects the movement of the detection unit described in “2” on a support. The support body is disposed so as to be movable in the thickness direction of the paper sheet passing through the measurement section, and the support body is positioned by a positioning means and locked by a locking means. , so that the lock can be released. Therefore, when it becomes necessary to widen the distance between the measuring part and the sensing member, the locking means can be released to release the support body and the sensing member pressing the measuring part can be separated from the measuring part. Furthermore, when it is no longer necessary to separate, by performing a locking operation using the locking means, it is possible to easily and reliably return to the state before separation without making any new adjustments.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, 3 is a reference roller (measuring unit) that serves as a reference for thickness measurement, and a detection roller 4 that is a detection member is in mechanical contact with this reference roller 3. Banknotes conveyed at high speed by a conveyor belt (not shown) are passed between the rollers 3 and 4. The detection roller 4 is connected to the free end (
The other end of this spring member 21 is fixed with a screw or the like to one end of a detection block 22 disposed substantially parallel above the spring member 21. The spring portion 4A21 includes, for example, a structural member 20a made of a metal plate,
A plate-shaped elastic body 2 crimped onto the upper surface of this structural member 20a.
It is composed of 0b and 20a
A detection roller 4 is attached to.

A thickness sensor 23, such as a non-contact displacement meter using eddy current loss, is disposed on the tip side of the spring portion 21 and near the structural portion 20a.
is held by the sensor holder 24. Sensor holder 2
4 is attached to the other end of the detection block 22 (above the detection roller 4), and by turning the sensor adjustment screw 25 and moving the sensor holder 24 up and down, the thickness sensor 2
3 and the structural member 20a of the spring member 21 can be adjusted.

With this configuration, when a banknote is conveyed between the reference roller 3 and the detection row 4, the detection roller 4 is vertically displaced according to the thickness of the banknote, and the amount of displacement is compensated by the spring. Thickness sensor 2 via structural member 20a of member 21
3 and converts it into an electrical signal.

Detection block 22 is coupled to guide block 27 via slider 26 . That is, the slider 26 attached to the detection block 22 is inserted into a dovetail groove 28 provided in the guide block 27 and is coupled to the guide block 27 in the dovetail groove. Further, the slider 26 is movable in the vertical direction along the dovetail groove 28, and the vertical position adjustment is performed by turning an adjustment screw 30 supported by a screw support plate 29. There is.

Here, the dovetail groove connection between the slider 26 and the guide block 27 includes an inclined concave groove (so-called "dovetail groove") 28 provided in the guide block 27 and a wedge-shaped wall surface forming the slider 26. The guide block 2 is fitted with a rod-shaped column (so-called "Dovetail") 26a
A lock lever 3 rotates around a shaft 31 provided at 7.
2, the through hole 33 carved in the guide block 27
The two are joined by pressing the dovetail 26a of the slider 26 through it. That is, by rotating the lock lever 32 counterclockwise about the shaft 31 from the position shown in FIG. The slider 26 is released from the guide block 27 by moving away from the wall surface and releasing the pressing force. By turning the adjustment screw 30 in this state, the vertical position of the slider 26 with respect to the guide block 27, that is, the vertical position of the detection roller 4 with respect to the reference roller 3 is adjusted.

After performing the above position adjustment, reverse the lock lever 32.
By rotating the lock lever 32 clockwise about the shaft 31 from a state in which the elastic pressing body 34 formed at the tip of the slider 26 is separated from the wall surface of the dovetail 26a, the tip of the lock 1 lever 32 is rotated. The elastic suppressor 34 formed at the tip of the lock lever 32 generates a pressing force against the dovetail 26a of the slider 26, which causes the guide block 27 and the slider 26 to press against the wall surface of the dovetail 26a of the slider 26.
Frictional force is generated at the dovetail groove joint between the dovetail and the dovetail 26a. Since this frictional force is generated against the wedge-shaped wall surface of the dovetail groove joint, a strong joint force can be exerted with a small amount of force, and the detection block 22 is fixed to the guide block 27 with a sufficiently strong force. It is something that can be done.

In this way, since the detection block 22 is detachably attached to the guide block 27 via the slider 26, the gap between the thickness sensor 23 and the structural member 20a of the spring cavity 21 can be adjusted by using the detection block 22. 22 is removed from the guide block 27, making the adjustment work easy.

The guide block 27 is attached to the main body block 3 by screws etc.
5, and one end of this main block 35 is
It is rotatably supported by a shaft 36 fixed to a completely fixed part of the device main body (not shown), and its range of rotation is regulated by a stopper 37 fixed to the completely fixed part. Further, one end of a press block 38 is rotatably supported on the shaft 36, and its rotation range is limited to a pin 39 provided on the main body block 35 and a guide plate provided on the press block 38. It is regulated by coupling with a vertically elongated hole 40a formed in 40.

A compression spring 41 is fitted between the suppression block 38 and the main block 35, and is held in a state that resists the restriction caused by the connection between the pin 39 and the guide plate 40.

In addition, the toggle clamp 4 attached to the fully fixed part of the main body
2 is adapted to suppress the pressing block 38 and release the pressing by rotating the clamp lever 43.

In such a configuration, by rotating the clamp lever 43 clockwise and moving the toggle clamp 40 downward, the suppression block 38 is pressed in the direction of the reference roller 3, and the tip of the main body block 35 is Stopper 3
7, when the pin 39 is further pressed, the pin 39 moves upward along the elongated hole 40a of the guide plate 40, thereby closing the gap between the main body block 35 and the pressing block 38. A pressing force will be applied to the body block 35 by the compression spring 41. As explained in the conventional example, this pressing force acts to release the force applied to the detection roller 4 in order to soften the impact of the detection roller 4 when a thick banknote, for example, stacked banknotes, is conveyed. It is something to do.

Further, the pressing force applied to the pressing block 38 can be easily released by rotating the clamp lever 43 counterclockwise.

With the above configuration, for example, the reference roller 3 and the detection roller 4
If a banknote is jammed between the two, rotate the clamp lever 43 counterclockwise to release the toggle clamp 42, and the detection roller 4 as reference roller 3
The jammed banknotes can be easily removed. In addition, after this removal work is completed, it can be easily restored to its original state by performing the reverse operation to the above, and in this case, no complicated adjustment work is required, resulting in excellent maintainability. ing.

In the above embodiments, the paper sheet whose thickness is to be detected is a banknote, but the present invention is not limited thereto, and may be applied to securities other than banknotes, mail, etc. The same applies.

[Effects of the Invention] As described in detail above, according to the present invention, a support body that supports a detection member that contacts a measurement part via an elastic support member is movably disposed, and this support body is attached to a fixed part. lock, or
Since it can be released, it is possible to easily widen the space between the measuring part and the detection member, and it is also easy to return to the original pressed state, making it easy to maintain. equipment can be provided.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Fig. 1 is a side view showing the configuration, Fig. 2 is an exploded perspective view of the main parts, Figs. 3 to 5 explain a conventional sheet thickness detection device, and Figs. FIG. 4 is a diagram for explaining the schematic configuration and operation, and FIG. 5 is a signal waveform diagram for explaining the operation. 3...Reference roller (measuring section) 4...Detection roller (
detection member), 21... spring member (elastic support member), 2
2... Detection block (support body), 23... Thickness sensor (detection means), 24... Sensor holder, 26...
Slider (support body), 27... Guide block (support body) 28... Dovetail groove, 32... Lock lever-3
4... Elastic pressing body, 35... Main block (supporting body), 37... Stopper (positioning means), 38...
- Suppression block (support body), 42... Toggle clamp (locking means), 43... Clamp lever (locking means). Funeral diagram diagram

Claims (1)

[Claims] (1) A measuring unit that serves as a reference for measuring the thickness of paper sheets being conveyed; a sensing member that mechanically contacts this measuring unit; an elastic support member that elastically supports this sensing member; and the paper sheet. a detection means that detects the movement of the detection member that moves according to the thickness of the paper sheet when the paper passes between the measurement section and the detection member, and converts the detected movement into an electric signal; and the elastic support. a support member that supports the member and the detection means and is disposed to be movable in the thickness direction of the paper sheet passing through the measurement section; and a positioning means that controls the movement range of the support member and performs positioning. and a locking means for locking the support body positioned by the positioning means.