JPS5960302A - Thickness detector for paper sheet or the like - Google Patents

Abstract

PURPOSE:To detect the thickness of conveyed paper sheet or the like with high responsiveness by providing contactors and a roll which is driven by a conveyance mechanism to rotate, and providing a sensor which detects mechanical states of detection levers for supporting the contactors and outputs a thickness signal. CONSTITUTION:When the front end of paper sheet P or the like conveyed while clamped between conveyor belts 11a and 11b move to between some contactor 24 and the roll 14, the contactor 24 moves onto the paper sheet P and its detection lever 21 is elevated. At this time, the detection lever 21 receives the moment having an arm of moment between the detection lever 21 and contactor 24 to twsit. Then, the contactor 24 further moves onto the paper and hops up to start oscillating. The contactor 24 contacts with the paper sheet P except in the hop-up period continuously until the paper sheet P finishes passing between the roll 14 and contactor 24, and the detection lever 21 twists corresponding to the thickness of the paper. The torsional moment is detected by load cells 26a and 26b at both ends of a shaft material 20 and their output difference corresponds to the torque, i.e. the displacement extent of the contactor, namely, the thickness of the paper sheet P, thus detecting the thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet thickness detection device for measuring the thickness of paper sheets being conveyed by a conveyance mechanism.

[Technical background of the invention and its problems]

For example, paper sheets such as banknotes and data cards are usually stored in a stacked state, and in order to obtain information on such paper sheets and classify them according to their information, you need to take them out one by one and, for example, There is a gap to send it to the reading device. in this way,
The main reason for feeding the sheets one by one is that with the current technology, the reading device Jiff cannot simultaneously read information on a large number of sheets of paper (D7r, , [warp)]. However, even if in the future it becomes possible to read a large number of sheets at the same time, there will be widespread use of means for classifying these sheets according to the information contained in each sheet.

Such a classification=y=stage is expected to have a very complex 41' configuration, and the stability of its operation is also questionable.

For these reasons, in the conventional paper sheet force 1 processing system, h)
Whether or not the paper sheet fed into the claw device is 6 ((+ crab) 2: Thickness detecting device i4J is installed in the middle of the conveyance path of the gold paper leaf to detect, and this thickness detecting device 4 detects two or more sheets. When a shaped paper sheet is detected 1~, the &1 sorting mechanism is driven to switch the conveyance path, thereby renoecting these paper sheets, and inserting the rejected ticket into the hole again, for example./ζ After that, tl) I try to lose.
, even if there is only one sheet of paper being conveyed, there are cases where a piece of paper or sticky cheese is pasted on a part of the sheet.This is detected and these sheets are sorted and accumulated in the appropriate place. Detection of sticky cheese and the like at this time is also performed by the thickness detection device f7.

By the way, in the past, various methods have been proposed for binding with a thickness of t6r. For example, one of them uses transmitted light. This is calculated by using the difference between the amount of light transmitted through one sheet of paper and the amount of light transmitted through two or more sheets.
It is something that takes care of people.

However, this method has the disadvantage that it cannot detect transparent sticky cheese or the like attached to the paper sheet. There is still a method of measuring thickness using ultrasound. However, since paper sheets are highly flexible, accurate measurements cannot be made because sheets that are being transported at high speeds are often bent to one side or vibrated due to air resistance. . The thickness of the shredded paper sheet C↓ is usually 1100 tt, but the culmness is disadvantageous, such as not being able to obtain sufficient resolution to detect j [l of the paper sheet.

Therefore, as a means to most reliably detect the thickness of a paper sheet, a method has been considered in which a contactor is brought into contact with the paper sheet being conveyed, and the thickness of the paper sheet is detected based on the movement of the contactor. For example, as shown in Fig. 1, a plurality of pairs of upper and lower conveyor belts) -18,lb are provided in parallel on a conveyor path across the V, and one side is rotatably driven by the conveyor belt.
．． A plate spring 3 with one end fixed is placed on the other side, and a small roller 4 as a contact that contacts the D-roller 2 is provided at the tip of the plate spring 3. The thickness of the paper sheet is detected by measuring the displacement of the leaf spring 3 with, for example, a displacement sensor 5 when the small roller 4 is lifted up by the small roller 4 on the paper leaf as the leaf is conveyed. That's what I do. With this method, it is possible to detect whether the number of sheets being conveyed is one, two, one, or more.

However, the response e in this device, the leaf spring 3
It is determined by the natural period of the bending vibration of the vibration system composed of the small roller 4 and the small roller 4. That is, the moment when the small roller 4 is attached to the paper sheet that has been conveyed, /j・1-1-ra4
After that, the contact with the paper sheet and the fly-up of the paper sheet are gradually attenuated, and it comes into contact with the paper sheet in a linear manner. Therefore, measurement cannot be performed until the vibrations are detected. Therefore, it is possible to shorten the time at which free vibration occurs by adjusting the tilt Gunpa, but in this way, measurement is not possible.
It is Noh. At this first contact, the required time is the bending vibration of the vibration system consisting of the leaf spring 3 and the small roller 4!1iIJ
It is determined by the natural vibration pill. Therefore, paper j (
If the conveyance speed of ゛.: is increased, the paper sheet will have traveled a considerable distance during the time when the small roller 4 comes into contact with the paper sheet f, and this portion cannot be measured. However, there was a drawback in that even if a relatively narrow material such as the commonly used transparent tape was pasted on a sheet of paper, it could not be detected if it came off.

If we reduce the specific number of bending motions of a 1-axis motion system consisting of J, leaf spring, I, and contact small [f-・-74] by 1, JL (ill constant performance (・, 1, improves, That's no good l: l!J,
c:l: spring 5jl of spring 3? Increase i'i or lower the inertia of small l]-noJ to 7.1! j5Ull, must. However [7, from the viewpoint of durability, small roller 4
To lower the inertia of c, i, I=1. ', there is a tilt, and the spring is constant; when the twins are raised, the paper sheet is small 1] - Ra 4 and roller 2
Is it possible to pass between the cups? ltk, zumari 6z causes Q, ;; between F! ,! - There is a point.

[Object 1-1 of the invention] Invention C": This 9L eel thing 1'l'j VC was not seen, and the 14th object is d,]j paper sheets being sent. An object of the present invention is to provide a filter paper sheet thickness detecting device i'1', which can reliably detect the thickness of filter paper sheets with high responsiveness.

[Summary of the invention]

According to the present invention, the contactor and the upper M1w are rotationally driven by the fourteenth conveyor in such a manner that the paper sheet being conveyed by climbing on the conveyor plate passes between the two while contacting them. A roller is provided. Also, -1'1+11 side is front 111: paper -° "1 force I's 1 fl; ))', 1
rll (',: A lever is provided which rotates around the descending axis and supports the contact at the other end 1111, and further moves the contact from the 11-ra (III).
Detect the pressing force applied to the lever and place it on the surface of the lever other than on the line drawn through the contact so as to be orthogonal to the rotational axis center line on the detection lever. A spring member is provided which is applied via . Additionally, a sensor is provided that detects the mechanical state of the detection lever and outputs this as a thickness signal.

〔Effect of the invention〕

With the above configuration, when a paper sheet enters between the contact and the roller, the contact is pushed up, and the -C detection lever is also pushed up. The spring member that presses the side is the surface of the detection lever, and is drawn on the detection lever of the bracket through the contact so that it is perpendicular to the rotational core line of the detection lever.p)! Since the pressing force is applied through a position outside the upper body, when the detection lever is pushed and is about to be raised due to the pushing of the contact, the contact A torsion -I:-ment is applied between the position of the arm and the point of pressure jIj by the spring member. When the contactor is pushed up by the sheet of paper, the detection lever 11 will be twisted.

J The time required for 4 when the suspicious feeler touches the paper leaf 4a from the second point to the paper leaf that has been conveyed/Jumps immediately after this: t: J
tIi output control bar vibration Jt with contactor attached
Determined by JI. The shorter the period of vibration, the higher the responsiveness of the thickness detection device 1. In the device of the present invention, for the reason mentioned above, the detection lever Q tries to vibrate in a torsional mode after 1rc when the contactor is placed on the sheet of paper. The natural frequency of this torsional J, &e motion is much higher, ranging from several times to several tens of times, compared to the case of simple bending vibration as in the conventional device. Therefore, the time required for the contact to come into contact with the sheet from the top of the sheet immediately after it has landed on the sheet of paper is much shorter than the conventional device, and the time required for the contact to come into contact with the sheet from the top of the sheet is much shorter than that of the conventional device. Until then, the paper leaf becomes AI
: The distance 161t can be shortened.

As a result, even if the paper feed speed is increased by 1 step, the paper sheets will not overlap, and the paper sheets will be stuck in the direction perpendicular to the paper sheet conveyance direction. Teno' etc. can also be detected.

[Embodiment J of the invention Embodiments of the present invention will be described below with reference to the drawings.

To'52 Figure Q-11, A. Invention -')': J of papery diarrhea related to Mli example, +l 1 moxibustion S It is. In the same figure, Ila
, Ilb is a conveyor belt which forms Z・1 at the bottom and pinches and conveys the paper goods P one shell between them, and this conveyor belt ll
As shown in FIG. 3, two pairs of conveyance paths 12 are provided in the horizontal force direction, and the conveyance path 12 is formed into a number 41 and a number 71. On the lower side of the conveyance path 12, 'J!' is located on the lower side on the outer peripheral surface. :'
/ ] Groove 1 into which the wooden belt 11b fits into the outer peripheral surface: ? a, 1,? The roller 14 having the roller b is arranged so that the Mruρ2 is perpendicular to the feeding direction7),
The roller 14 is rotatably supported by φIi (te;) via bearings 15n and 15b.

And J2Fif: 'I Yu16-s'+;g f
It is fixed to the support wall 17 by means of a bolt or the like.

Therefore, +Qo-ra 14 is in place 1〆1. B) Near one loaf and above the conveyance path 12, this conveyance jx';, h'
:'i The first support Bl (
4'J 7s is arranged, and this first support part (
One end side of 41H 1: As shown in FIG.
11. On the side facing the rollers 113. and located between the two pairs of conveyor plates, there is a Three second supporting members 19 are arranged at equal intervals in a direction perpendicular to the conveyance direction, and one end side of each is fixed to the other end side of each of these second supporting members 19. 1
A shaft member 20 (see FIG. 5) is fixed through the shaft member 20 (see FIG. 5) in parallel with the axial center line of 4, that is, parallel to the conveying surface, with both ends protruding from both 11+1 ends of the second support member 19. has been done. Each bolt 20 has a U-shaped cross section, and one end of the detection sensor/-21 is connected to the axle load 20 through bearings 22a and 22b as shown in FIG. Mf of both ends (p2, L7-,) (rotatably supported by the supported IN+1 member. 1 each detection lever 2)
The gong of Ro-ro 4 (in the upper part, there is '!!1)
'l; 11 November 2 as shown in Figure 3. ? is roller 1
6, which is parallel to the 1111 core wire of 4, and both ψ; Il1
From the center of the mouth A'23 (a position offset in either direction, for example, in this embodiment, the center as shown in FIG. 3)
11, a contactor 24 is attached to the left side position in the figure. The contact 24 is constituted, for example, by a small bearing, the inner race of which is fixed to I) IHI' 23 and the outer race of which is rotatable.

Thus, a force is applied to each contactor 24 via these detection levers 2J to the roller 14 side ('J
For example, leaf springs 25 are arranged, and these leaf springs 2
One end side of 5 is fixed to the first support member 18, and the other end side is fixed with respect to the contact 24 as shown in FIG. The position of the detection lever 1 [fixed distance] from the armature 24, (I%), is in contact with the detection lever 21 at a right angle to its rotational axis. The line drawn through -r-24 is set up to touch a position other than 2.

On the other hand, at both ends of the shaft member 20 that supports each detection lever 21, sensors for detecting the stress applied to these end faces, ie load cells 26h and 26b, are provided, and these load cells 26a .

The transmission bow 26b is sent out as a thickness signal of the paper sheet P.

Next, the operation of the paper sheet thickness detecting device constructed in step 1 will be explained.

Sandwiched between the conveyor belts 1ft and 1lb
When the tip of the injected paper leaf force] P reaches between each contact f'24 and the roller 14, each contactor 24
This causes each detection lever 21 to touch the shaft member 2.
It can be lifted up using θ as the fulcrum. At this time, the upper surface of the 4/JI output lever 21 is steeply exposed, the inside of the 21 is 4-) 2ft, and the 11-24 is the E'11.
Tri (0 to 4.
・Since the plate is being pushed by one end of the leaf spring 25, it is detected.

However, when the contact 24 is pasted on the paper sheet P (-),
The contact 24 jumped up for the fishing rod at that moment, and
The contact with the leaf 111'i P is reached, and from this point on, the detection lever 2 begins to vibrate in an attempt to return to the ra position.

Then, at least two revolutions 1 of the vibration (Jj followed by jχ
Tentacle 24 recontacts n(leaf 5+ri p).

After that, there were some jumps, and the contact was repeated.
The vibration IflJ is attenuated. Then, the contactor 24 gets on the paper sheet P, and the paper sheet P contacts with the paper sheet +'4 P except for the jump period immediately after this. 14 and the contact 24)
). For this reason, the front 81 detection lever 21 is subjected to twisting depending on the thickness of the paper sheet. At this time, the screw removal caused by the twisting of the protrusion 21 +-&yo+IQl+ 12° stroke.
It is detected by load cells 26a and 26b provided at 114. These load cells 26a.

The difference in the output of 26b corresponds to the twisting force, that is, the amount of displacement of the contactor 24, and the thickness of the paper sheet P in other words.
As a result, the thickness can be detected1.In this case, as mentioned above, since the torsional force is applied to the detection lever 21 when the thickness of the paper 11゛≦, the contactor 24 II, 'jliil f'J, detection lever 21 from the time when the contact 24 jumps up immediately after it gets stuck on the paper sheet P and burns until it contacts the paper sheet P again
The vibration period of this torsional vibration is generally very short, and the contactor 24 depends on the period of the torsional vibration of the paper sheet P.
It is possible to shorten the non-measuring time from the time when the paper sheet P jumps up after the paper sheet P is brought into contact with the paper sheet P again, and the responsiveness can be improved. Therefore, even if the conveyance speed of paper sheets P is increased, the thickness can be detected. iI′:.

It can be detected accurately.

In addition, in the embodiment described in 1-1, the detection lever is in the U-shape 11. jJ, but this shape is limited to
) it is (l; j crab, for example 11η1
1 material 20, 2.7) is located in a U-shaped shape (sun [7), other parts may be flat plate-like 1, 7, but in the above embodiment, I : Il, so-called 3 detectors are used, but the number of cylinders is 1 (the number of cylinders may be 1.81゛, and the sensor is low 1゛. Not limited to cells, contact-!゛ is IIV, (
Displacement bl,' of the detection lever in the part where lI/J is connected
4+・(It may be a gold mine, or it may be added to the detection lever.
+: It may be one that directly detects the D bending stress.

[Brief explanation of drawings]

Figure 1: Conventional paper sheets) 1. ■A schematic configuration diagram of the 4ξ position for detecting blemishes; FIG. 2 is a side view showing the main parts of a sheet thickness detection device according to an embodiment of the present invention; FIG. 3 is a line A-A in FIG. ; L1 sectional view, Figure 4 is B in Figure 2
-B line cut arrow diagram, Nr'+ Figure 5 is C in Figure 2
-C line cut arrow h1 diagram. 12...1 general feed path, 14...roller, 2)...tau
Exit lever, 24... Contact, 25... Leaf spring, 26a
. 26b...Load cell, P...(it leaves, 15
1+2ri person agent patent attorney rule close X7x I(
iFigure 1 2:X2 Figure 17 Figure 3

Claims (1)

[Scope of Claims] (]) (Contactors arranged to face each other in such a manner that the paper sheets conveyed by the general conveyance machine pass between them while contacting them, and 1. t4+) Conveyance machine A roller rotationally driven by
It is rotatably supported around IIn+ parallel to i, and the other end side supports the contact 1. "" is detected. 91 of the detection lever (and the rotation +
a spring member applied through a position other than on a line drawn through the contact so as to be perpendicular to the nb core wire; and a sensor that detects the mechanical state of the detection lever and outputs it as a JIJI signal. A paper sheet thickness detection device comprising: (2) 'i,' characterized in that the contactor is a small roller rotatably supported in the conveying direction of the paper sheet.
i·i' [The paper sheet thickness detection device according to claim 1. (3) Claim 1, wherein the sensor detects mechanical displacement of the detection lever.
Paper sheet thickness detection device listed in MIJ. (4) The thickness detecting device for paper sheets as set forth in claim 1, wherein the device detects torsional stress and breakage applied to the seven-fold levers T, L2 and the detection lever.