JPH0252252A - Rigidity measuring instrument for paper or the like - Google Patents

Abstract

PURPOSE:To measure the rigidity of paper, etc., objectively with good reproducibility by clamping a medium between two sliders which are held slidably and then accurately pressing one slide against the other at a constant speed. CONSTITUTION:The 1st and 2nd sliders 15 and 16 are held on horizontal parallel guide rods 13 slidably in the lengthwise direction and extended at right angles to them. A medium grip plate 18 is provided on the sliders 15 and 16 to grip both front and rear edge areas of the paper medium to be measured. The slider 15 which grips the front edge of the medium is connected to the detection end 20 of a strain gauge 19 and the slider 16 engages a ball screw 21 threadably and is movable on the rod 13 by the rotation of a stepping motor 23. Therefore, when the motor 23 is put in operation, the slider 16 moves forth to send a forward force to the slider 15 through the medium and a signal corresponding to the rigidity of the sent medium 17 is outputted from the gauge 19 by the detection end 20.

Description

[Detailed Description of the Invention] [Summary] A device capable of objectively and reproducibly measuring the stiffness of paper sheets used in bank passbooks, etc. Two guide rods installed horizontally and parallel to each other,
first and second sliders held on the guide rod so as to be slidable substantially without resistance along the longitudinal direction of the guide rod and extending perpendicularly to the guide rod; and mounted on each slider. a medium gripping plate, the first slider is connected to a sensing end of a strain gauge installed in front of the first slider, and the second slider located behind the first slider is parallel to the guide rod and stepped. It is configured to be screwed together with a ball screw rotationally driven by a motor, and to be movable on the guide rod by rotation of the ball screw.

[Industrial application field]

The present invention relates to an apparatus for measuring the stiffness of paper sheets used in bank passbooks and the like.

[Conventional technology]

Automatic deposit machines are configured so that a bankbook inserted into the machine is turned over one by one by an automatic page turning mechanism and sent to a bankbook printer, where necessary information is automatically printed. When designing and developing this automatic page turning mechanism,
The physical properties of the target medium, ie, the paper of a bankbook, especially its rigidity (strength, ie, resistance to bending) are important factors to consider.

In other words, to explain the action when turning the pages of a passbook,
As shown in FIG. 3, the bankbook 1 with the page to be turned is held between the turning roller 2 and the pinch roller 3, and both rollers are rotated in the directions of the arrows, and the turning roller 2
Then, as shown in FIG. 4, the pinch roller 3 is lowered to reduce the contact pressure between the turning roller 2 and the passbook 1, and the turning roller 2 is separated from the rest of the pages. 2 is continued, so that only the top page of the passbook 1 is selectively curved upward in a convex manner.As shown in Fig. 5, the pinch roller 3 returns and the passbook is folded together with the turning roller 2. 1 is moved back to the right in the direction of the arrow, the curved top page 1' is flipped onto the turning roller 2.Then, both rollers 2 and 3 are reversed as shown in FIG.
Passbook 1 moves forward and passes the gripping points of both rollers, but page 1
Since ゜ cannot pass through this gripping point, the turning is completed.

In this way, in the automatic page turning mechanism, forces are applied to both edges of the passbook page so that they face each other, and the resulting curvature is used to turn the pages. Understanding the physical properties, especially the rigidity, is an important factor in device design. In other words, a basic database of the rigidity of the passbook medium is required in order to design a stable automatic page turning mechanism for the paper quality of passbooks that differ for each user.

The conventional method of measuring the rigidity of paper is as shown in Fig. 7, in which one edge of a sheet of paper to be measured 6 cut from a bankbook is placed on a flat desk with a stopper. 7
The tip of the detection end 5 of the spring-type balancer 4 is pressed against the other edge of the paper sheet 6 by hand, and the force when this starts to curve is read from the scale of the balancer 4.

[Problem to be solved by the invention]

However, with this method, the measurement results obtained vary widely due to individual differences in measurement, difficulty in stabilizing measurement conditions, and structural problems with the balancer itself, resulting in unreliable results. It was lacking in

In view of the conventional method of measuring the stiffness of paper sheets that lacks reliability, the present invention aims to provide an apparatus that can objectively and reproducibly measure the stiffness of paper sheets.

[Means to solve the problem]

That is, this purpose consists of two guide rods installed horizontally and parallel to each other; a medium gripping plate mounted on each of the sligs, the first slider being connected to a sensing end of a strain gauge installed in front of the first slider; The second slider located behind the first slider is configured to be threaded with a ball screw that is parallel to the guide rod and rotationally driven by a stepping motor, and is movable on the guide rod by rotation of the ball screw. This is achieved by a paper sheet stiffness measuring device characterized by the following.

[For production]

The medium to be measured is set flat with its front and rear end regions held on the first and second sliders by the medium holding plate. When the spring type (Japanese) rotates and drives the ball screw, the second slider gradually moves forward along the guide rod.

Then, the forward force is also transmitted to the slider via the gripped medium. As a result, the first slider presses the detection end of the strain gauge, and the strain gauge outputs a signal corresponding to the transmitted force, that is, the stiffness of the medium. By graphing this force and the moving distance of the first slider using an X-Y plotter, microcomputer, etc., a kneading pattern specific to the medium can be obtained.

Hereinafter, the present invention will be explained in more detail based on preferred embodiments shown in the drawings.

〔Example〕

1 and 2 show a plan view and a side view of an embodiment of the medium stiffness measuring device according to the present invention.

This device has a horizontal flat base 10 on which two parallel guide rods 13 are fixedly supported by front and rear stands 11, 12.

On the guide rod 13, there are a first slider 15 and a second slider 1 that are parallel to each other and extend laterally so as to straddle them.
6 is provided. Both sliders 15, 16 are attached to the guide rod via means with very low sliding friction, such as linear ball bearings (not shown), and are able to slide on the guide rod 13 substantially without resistance.

Above both sliders 15 and 16, there are provided medium gripping plates 18 for gripping the front and back edge regions of a medium 17 such as a sheet of paper to be measured.

A strain gauge 19 is installed on the base 10 in front of the first slider 15, and the tip of its detection end 20 is connected to the front center of the first slider 15, and corresponds to the force generated by the movement of the slider 15. and is configured to generate a signal.

On the other hand, the center part of the second slider 16 is connected to the stand 12.
The guide rod 13 is also screwed into a ball screw 21 supported in parallel with the guide rod 13 . The rear end of the ball screw 21 is attached via a coupling 22 to the shaft of a stepping motor 23 installed in the rear region of the base 10. With this configuration, the stepping motor 23
When the ball screw 21 rotates, the ball screw 21 also rotates, and the second slider 16, which is screwed into the ball screw 21, moves back and forth depending on the direction of rotation of the motor.

Next, an example of how to use this device will be explained.

First, the medium 17 to be measured is gripped at its front and rear edge regions by both medium gripping plates 18. It is set neatly on the second slider 15.16. On this occasion,
It is necessary to set the initial position of the second slider 16 by appropriately rotating the stepping motor 23 so as not to apply force to the strain gauge 19 and to prevent the medium 17 from becoming slack.

Next, the stepping motor 23 is operated to move the second slider 16, which grips the trailing edge of the medium 17, forward. The first slider 15 gripping the leading edge of the medium is a strain gauge 1
Since the medium 17 set on both sliders is held by the detection end 20 of 9, the medium 17 is curved upward and kneaded while being gripped by both edges. The change in force during this period is continuously output as a signal from the strain gauge 19 and input to a control section (not shown).

From the output signal and the rotational speed of the stepping motor 23, a stress distortion curve leading to kneading of the medium is obtained by a known means such as an X-Y plotter.

When the measurement is completed, the stepping motor 23 starts reverse rotation, returns the second slider 16 to its original position, and prepares for a new measurement.

〔Effect of the invention〕

According to the present invention, two sliders are slidably held by a guide rod with low resistance, and one slider is moved precisely with respect to the other slider at a constant speed with a medium being held between both sliders. Since the strain gauge connected to the latter reads the change in force until the medium is kneaded, the rigidity of the medium can be determined with extremely high reproducibility. This makes it possible to construct a database regarding the rigidity of media, which allows for the design and development of automatic page turning mechanisms that are compatible with each user, as well as objective and appropriate evaluation during product inspection of manufactured automatic page turning mechanisms. It becomes possible to do this.

[Brief explanation of the drawing]

Fig. 1 is a side view of the paper sheet rigidity measuring device of the present invention, Fig. 2 is a plan view thereof, Figs. 3 to 6 are explanatory diagrams showing the working procedure of the automatic page turning mechanism, and Fig. 7 is FIG. 2 is a perspective view showing a conventional method for measuring stiffness of paper sheets. 10, Base, 11.12 Stand, 13
Guide rod, 15 first slider, 16 second slider, 17 medium, 18 gripping plate, 19 strain gauge, 20 detection end, 21 ball screw, 22 coupling, 23 stepping motor. A perspective view showing a diagram.

Claims (1)

[Claims] 1. Two guide rods (13) installed horizontally and parallel to each other, which are held on the guide rod (13) so as to be slidable substantially without resistance along the longitudinal direction thereof; (13), the first and second extending orthogonally to
sliders (15, 16) and each slider (15, 16);
), the first slider (15) is connected to a sensing end (20) of a strain gauge (19) installed in front of the first slider (15); The second slider (16) located behind the slider (15) is threadedly engaged with a ball screw (21) that is parallel to the guide rod (13) and rotationally driven by a stepping motor (23). A rigidity measuring device for paper sheets, characterized in that it is configured to be movable on the guide rod (13).