JPH0854336A - Peel force measuring instrument - Google Patents

Abstract

PURPOSE:To easily measure the peel force of the cover sheet of a sample of a pressure-sensitive spread post card, etc. CONSTITUTION:A first slide 6 and second slide which can respectively hold end sections 13a and 13b of the sheets of a sample 13 for measuring peel force composed of two sheets when one sheet is torn off from the other sheet are held by means of a guide rod 5 in movable states and the mover 32 of such a load measuring tool 30 as the spring balance, etc., is connected to the first slide 6 through a wire 35. In addition, a moving pointer 42 is movably provided in the vicinity of the measuring tool 30 so that the pointer 42 can only transmit the movement of the mover 32 in the direction B. While the slides 6 and 7 hold the sample 13, one sheet of the sample 13 is torn off from the other sheet by moving the second slide 7 in the direction A and the peel force which acts on the first slide 6 when one sheet is torn off is detected from the position of the pointer 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peeling force measuring device for measuring a peeling force required for peeling a pressure-sensitive spread postcard or the like.

[0002]

2. Description of the Related Art Recently, pressure-sensitive spread postcards have been widely used. This pressure-sensitive spread postcard is a postcard in which the information is recorded on the double-page spread, and then folded and pressed with a pressure bonding machine to be bonded. To do. In such a pressure-sensitive spread postcard, the degree of adhesion (peeling force) of the spread pages is important and will not be unintentionally peeled off during transportation, etc., but when peeled off, the peeling force (peeling force) Usually, it is necessary to set the maximum peeling force). Since this peeling force (bonding degree) is determined by the pressure bonding force (size of the gap between the press rolls) of the pressure bonding machine, the gap between the press rolls of the pressure bonding machine is adjusted so that the bonding degree becomes a desired value. There is a need.

By the way, a device for simply measuring the peeling force of a pressure-sensitive spread postcard has not been developed in the past. Therefore, an expert must peel off the postcard to judge the peeling force, and adjust the crimping machine based on the peeling force. It is the current situation. However, methods that rely on human senses cannot make accurate judgments, and may cause pressure-sensitive spread postcards to have poor adhesion (peeling in the middle due to too weak adhesive strength, or too strong adhesive strength to prevent peeling). There was a problem that there is.

Conventionally, various peel testers for measuring the peel strength of laminated materials are known (for example,
It is conceivable to use these peeling testers for measuring the peeling force of a pressure-sensitive spread postcard, such as Japanese Utility Model Laid-Open No. 3-61556, Japanese Utility Model Laid-Open No. 2-95839, and JP-A-5-249027. However, all the conventional peeling testers have a problem that they are large and expensive. Further, in the conventional peeling tester, the sample is cut into a small width to make a test piece, and the peeling strength of the test piece is measured.However, in the pressure-sensitive spread postcard, the peeling strength has large unevenness in location, There is also a problem that it is difficult to accurately detect the peeling force as a whole with a test piece having a small width.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a small structure, a simple structure and a low cost structure capable of measuring the peeling force of a pressure-sensitive spread postcard or the like by a simple operation. The purpose is to provide a force measuring device.

[0006]

The present invention, which has been made to achieve the above object, comprises a first slide and a second slide each provided with a clamp for gripping an end portion of a sample whose peel strength is to be measured, and the first slide and the second slide. A guide means that holds one slide and a second slide so that they can move in the same direction, and a load measuring tool that is connected to the first slide and that has a mover that moves by an amount according to the force applied to the first slide, A peeling force measurement having a moving pointer arranged to be moved by the moving element only when the moving element is moved by the first slide, and a scale provided along a moving path of the moving pointer. The main point is vessels. Here, it is preferable that the load measuring tool is composed of only a spring.

[0007]

In the peeling force measuring device having the above-mentioned structure, one end of a sample whose peeling force is to be measured, for example, a pressure-sensitive spread postcard, is slightly peeled off, and the peeled end portions are respectively held by the clamps of the first slide and the second slide. , Slowly move the second slide away from the first slide,
The pressure-sensitive spread postcard held by the first slide and the second slide is gradually peeled off, and a force corresponding to the peeling force acts on the first slide. Therefore, the first slide also moves by being pulled by the pressure-sensitive spread postcard, moves the mover of the load measuring tool in accordance with the force applied to the first slide, and the mover moves the moving pointer. This moving pointer is moved by the moving element only when the moving element is pulled and moved by the first slide, so that the force acting on the first slide becomes small or disappears, and the moving element moves in the original direction. Even when it returns, the movement pointer does not return to the original direction, and therefore stops at the position corresponding to the maximum force applied to the first slide. Thus, by reading the position of the moving pointer on the scale, the maximum force acting on the first slide, that is, the maximum value of the peeling force can be detected.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention shown in the drawings will be described below. FIG. 1 is a schematic side view showing a peeling force measuring device according to an embodiment of the present invention with a side plate removed, and FIG. 2 is a schematic plan view thereof. In FIGS. 1 and 2, reference numeral 1 denotes a box-shaped main body, which can be used by placing it on a flat surface such as a desk.
A rubber leg 2 is attached to the bottom surface. Support plates 3 and 4 are provided on the upper surfaces of both ends of the main body 1, and a pair of guide rods 5 are horizontally mounted between them. The guide rod 5 movably holds the first slide 6 and the second slide 7. That is, the guide rod 5 constitutes a guide means that holds the first slide and the second slide so as to be movable in the same direction. The guide means is not limited to the illustrated guide rod 5 and may be a guide rail or the like.

The first slide 6 has a slide base 1 having a slide bearing 9 movably held by a guide rod 5.
0 and a clamp 11 mounted on the slide base 10. The clamp 11 is for holding one end of the sample 13 such as a pressure-sensitive spread postcard whose peeling force is to be measured, and has a width substantially equal to the entire width of the sample 13. As shown in FIG. 7, the clamp 11 includes a fixed clamp plate 15, a movable clamp plate 16 that can be opened and closed with respect to the fixed clamp plate 15, a spring 17 that urges the movable clamp plate 16 in an opening direction, and a movable clamp plate 15. A clamp mechanism 18 having an operating lever 18a for pressing and fixing the clamp plate 16 against the fixed clamp plate 15, a stopper pin 19 for regulating the insertion depth of the sample 13 to be clamped, and the like are provided. The fixed clamp plate 15 and the movable clamp plate 1
Abrasive paper 20 is attached to the surfaces of the tip end 6 of the sample 6 which face each other so that the sample 13 can be reliably clamped.

In FIG. 1, the upper end of the support plate 3 extends to a position where the slide base 10 of the first slide 6 abuts, and also serves as a stopper for restricting the movement of the first slide 6. Similarly to the first slide 6, the second slide 7 also has a slide base 23 having a slide bearing 22 movably held by the guide rod 5, and the slide base 23.
Of the first slide 6 is mounted facing the clamp 11 of the first slide 6 and at the same height. Further, a hook 25 for pulling the second slide 7 by hand is attached to the slide base 23 of the second slide 7.

Inside the main body 1, a load measuring tool 30 is provided parallel to the guide rod 5. This load measuring tool 3
0 is composed of only a spring, and as shown in FIGS. 3 to 5, an outer cylinder 31 fixed at a fixed position, a mover 32 composed of an inner cylinder movable with respect to the outer cylinder 31, The moving element 32 has a spring 33 connected to the moving element 32.
When a force in the direction of arrow B is applied to, as shown in FIG.
The mover 32 moves in the direction of the arrow B by an amount corresponding to the force and stops at that position. Pin 3 is provided on the upper surface of the moving element 32
2a is provided, and the outer cylinder 31 is formed with a groove 31a in which the pin 32a moves. In FIG. 1, the mover 32 of the load measuring tool 30 is connected to the first slide 6 by a wire 35. Incidentally, 36 and 37 are pulleys for hanging the wire 35. Thus, when a force in the direction of arrow A is applied to the first slide 6, the force causes the first slide 6 to move the mover 32 of the load measuring tool 30 via the wire 35.
While pulling out in the direction of arrow B, move in the direction of arrow A,
It stops at a position balanced with the tensile force of the spring 33 connected to the mover 32. Therefore, the mover 32 of the load measuring tool 30 moves by an amount corresponding to the force applied to the first slide 6.

As shown in FIGS. 3 to 6, the load measuring tool 30
A guide rod 40 is provided in the vicinity of and parallel to and holds a moving pointer 42 so as to be movable. This movement pointer 42
Is a pin 32 provided on the mover 32 of the load measuring tool 30.
When the mover 32 moves in the direction (arrow B direction) where it is pulled out from the outer cylinder 31 by the movement of the first slide 6 in the arrow A direction (see FIG. 1), it has a groove 42a for receiving a. Although it moves integrally with the mover 32 by 32a, when the pin 32a moves in the opposite direction, the pin 32a separates from the groove 42a and the movement pointer 42 does not move. Further, the movement pointer 42 has a knob 42b extending upward, and this knob 4
As shown in FIGS. 1 and 2, 2b extends upward beyond a groove 44 formed on the upper surface of the main body 1 and can be manually operated. One end 42c of the moving pointer 42 is the main body 1
Of the reference line 4
2d is drawn. A scale 46 is provided on the path along which the movement pointer 42 moves.

Next, a method of using the peeling force measuring device having the above structure will be described. 1 and 2, when the first slide 6 is not restrained, the spring 33 (see FIG. 4) of the load measuring device 30 pulls the first slide 6 through the wire 35, and the first slide 6 is supported. It is stopped at the position where it abuts the plate 3 (origin position), and the mover 32 is also stopped at the position (origin position) corresponding to it. In this state, the knob 42b of the moving pointer 42 is moved to the right by hand, and is set to a position (origin position) that engages with the pin 32a at the origin position.

Next, the open end of the sample 13 whose peeling force is to be measured is opened slightly (about 15 mm), and the open ends 13a, 1 are opened.
3b is clamped by the respective clamps 11, 24 of the first slide 6 and the second slide 7, respectively. At this time, the end portion 13
By setting a and 13b to abut the stopper pin 19 (see FIG. 7) provided on each clamp 11 and 24, the sample 13 can be grasped by each clamp 11 and 24 in the correct posture, and correct peeling can be performed. Can measure force.

After setting the sample 13, the second slide 7
Slowly pull the hook 25 in the direction of arrow A. As a result, the peeling force acts on the sample 13, the sample 13 is slowly peeled off, and a force corresponding to the peeling force acts on the first slide 6 to move the first slide 6 in the direction of arrow A, and The mover 32 connected via the wire 35 is pulled in the direction of arrow B and pulled out from the outer cylinder 31. Thus, as shown in FIG. 6, the moving element 32 and the pin 32 are moved by an amount corresponding to the peeling force acting on the first slide 6.
a moves in the direction of arrow B, and the moving pointer 42 engaged with the pin 32a moves in the direction of arrow B. At the time when the peeling of the sample 13 progressed and the number of adhesive points remained small (for example, when the remaining amount became about 10 mm),
The second slide 7 is released and the peeling is stopped. As a result, the mover 32 and the first slide 6 connected thereto are pulled back to their original position by the spring 33, but the moving pointer 42 does not return to its original position. Thus, by reading the position of the moving pointer 42 on the scale 46, the maximum load acting on the first slide 6, that is, the maximum peeling force can be detected. The peeling force of the sample 13 can be determined more accurately by repeating the above operation a suitable number of times and averaging the read values.

Although the sample 13 is peeled off by pulling the second slide 7 by hand in the above embodiment, the second slide 7 is mechanically moved by using a motor and a screw shaft instead. It may be configured. With this configuration,
Although the device configuration is slightly complicated, since the moving speed of the second slide 7 can be made constant, there is an advantage that the peeling force can be measured more accurately.

[0017]

As is apparent from the above description, according to the peeling force measuring device of the present invention, a part of the sample for which the peeling force is to be measured is peeled off, and the first slide and the second slide are gripped, By performing a simple operation of moving the second slide, the moving element of the load measuring tool is moved to a position corresponding to the peeling force, and the moving pointer is moved by the moving element to detect the peeling force. It has an effect that the peeling force can be easily measured without requiring skill.
Further, in the present invention, since the load measuring tool for detecting the force acting on the first slide (peeling force) may be provided with a mover that moves by an amount according to the acting force, for example, Since only commercially available springs can be used, the peeling force measuring device of the present invention is small in size, has a simple structure, can be manufactured at low cost, and has an effect that it can be carried to a desired place and used. are doing.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a peeling force measuring device according to an embodiment of the present invention with a side plate removed.

FIG. 2 is a schematic plan view thereof.

FIG. 3 shows a part of the above-mentioned peeling force measuring device as indicated by an arrow X- in FIG.
Schematic plan view seen in the X direction

4 is a schematic cross-sectional view of the load measuring tool 30 shown in FIG. 3 and its vicinity.

5 is a schematic sectional view taken along the line YY of FIG.

FIG. 6 shows the same portion as in FIG. 3 with a moving element 32 of the load measuring tool 30.
Schematic plan view showing the state of moving

FIG. 7 is a schematic side view showing the clamp 11 used in the above embodiment in an open state.

[Explanation of symbols]

 1 Main Body 3, 4 Support Plate 5 Guide Rod 6 First Slide 7 Second Slide 11 Clamp 13 Sample 24 Clamp 30 Load Measuring Tool 31 Outer Cylinder 32 Moving Element 32a Pin 35 Wire 42 Moving Pointer 46 Scale

Claims (2)

[Claims] 1. A first slide and a second slide each equipped with a clamp for gripping an end portion of a sample whose peel strength is to be measured, and a guide holding the first slide and the second slide so as to be movable in the same direction. Means and a load measuring tool that is connected to the first slide and has a moving element that moves by an amount according to the force applied to the first slide; and only when the moving element is moved by the first slide, A peeling force measuring instrument having a moving pointer arranged to be moved by a moving element and a scale provided along a moving path of the moving pointer. 2. The peeling force measuring device according to claim 1, wherein the load measuring tool comprises a spring balance.