JP2024012868A - Blocking strength measurement device and blocking strength measurement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blocking strength measurement device and a blocking strength measurement method by which a blocking strength between printed matters can be accurately measured on a desk even if the printed matters are large in size.

SOLUTION: A blocking strength measurement device that measures a blocking strength of stacked printed matters, comprises: a pull-up mechanism configured to pull up an end of an uppermost printed matter of the stacked printed matters in a direction perpendicular to the stacked printed matters; a transfer mechanism configured to transfer the stacked printed matters in a horizontal direction while the end of the printed matter is kept pulled up in the vertical direction by the pull-up mechanism; and measurement means connected to the pull-up mechanism and configured to measure a blocking strength which is a peeling force between the stacked printed matters.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a blocking strength measuring device and a blocking strength measuring method for measuring the blocking strength of printed matter.

Due to their nature, printed materials such as banknotes, passports, securities, stamps, etc. are required to be difficult to forge or alter, and are also required to have aesthetic elements. Such printed matter is printed by various printing methods such as letterpress printing, gravure printing, offset printing, and intaglio printing. Among these, intaglio printing is often used for the above-mentioned printed materials because of its unique feel, the formation of fine, sharp lines, and the fact that it cannot be manufactured without using a special printing machine.

Usually, the thickness of the ink film formed on paper in intaglio printing is approximately 10 μm to 40 μm, which is much thicker than the ink film obtained by other printing methods such as offset printing. Therefore, when printed materials are stacked one after another in the paper output section of a printing press, in addition to the fact that the ink on the printed materials is not completely dry, the weight of the stacked printed materials causes the stacking A phenomenon called "blocking" may occur, where prints adhere to each other.

As a way to eliminate this "blocking", you can manually separate a large amount of printed matter one by one by hand, or grasp both ends of a bundle of printed matter and bend each hand inward. It is necessary to separate the adhered printed matter by blowing air into the space, but this process requires a lot of effort and time. Therefore, in order to fundamentally eliminate "blocking", it is necessary to review the ink design, including the ink material, ink film thickness, and drying conditions.To do this, it is necessary to accurately understand the blocking strength between printed materials. becomes essential.

Conventional technology for measuring adhesion force accurately and quantitatively consists of a base that fixes one side of the sheet-like material, a pulling section that pulls up the other side in a direction perpendicular to the base, and a drive that drives the pulling section. A peel test device has been proposed that includes a drive unit that measures the adhesion of a sheet-like material, and a measuring device that measures the adhesion of a sheet-like material (for example, cited document 1).

Japanese Patent Application Publication No. 2006-194599

According to the prior art peel test device, when a pulling table connected to a chuck supporting one end of a sheet material is pulled up, a wire also connected to the pulling table pulls the base of the sheet material. As a result, the sheet material is always peeled off at a right angle. With this configuration, there is no problem if the test object is relatively small, but if the test object is relatively large and has intaglio printing on one side, the width of the print is limited due to the structure in which the base slides. This method requires twice as much testing space (for example, if the printed matter is 60 cm long and 80 cm wide, the test space is approximately 160 cm wide), resulting in a large-scale apparatus.

The present invention aims to solve the above problems, and provides a blocking strength measuring device and a blocking strength measuring device that can accurately measure the blocking strength between printed matter on a desk even if the test object is a large printed matter. A method for measuring blocking strength is provided.

The blocking strength measuring device of the present invention is a blocking strength measuring device that measures the blocking strength of laminated printed matter, and comprises:
a pulling mechanism that pulls up one end of the uppermost printed matter of the stacked printed matter in a direction perpendicular to the stacked printed matter;
a transport mechanism capable of sliding horizontally relative to the other end of the uppermost printed material of the stacked printed materials while one end of the printed material is pulled up in the vertical direction by the lifting mechanism;
a hoisting mechanism that allows the lifting mechanism and the transfer mechanism to operate simultaneously;
The present invention is characterized by comprising a measuring means connected to the lifting mechanism and measuring the blocking strength between the stacked printed matter.

Further, the blocking strength measuring device of the present invention is characterized in that the transfer mechanism slides at least on a rail extending in the horizontal direction.

Further, the blocking strength measuring device of the present invention is characterized in that it includes a winding roller that winds up a printed matter or the like.

Further, the blocking strength measuring method of the present invention is a blocking strength measuring method for measuring the blocking strength between stacked printed matter,
a step of placing the stacked printed matter on a flat surface;
fixing one end of the top printed matter of the stacked printed matter to a fixing part;
pulling up one end of the fixed printed matter in a direction perpendicular to the stacked printed matter;
sliding one end of the fixed printed matter relative to the other end of the top printed matter of the stacked printed matter in a direction parallel to the plane;
The present invention is characterized in that it includes a measuring step of measuring, with a measuring means, the force acting on the support when the printed matter is peeled off due to sliding of one end of the printed matter.

According to the blocking strength measuring device and the blocking strength measuring method of the present invention, even if the test object is a large printed matter, the blocking strength between the printed matter can be accurately measured on a desk.

A perspective view showing the overall configuration of the blocking strength measuring device of the present invention A perspective view showing the vicinity of the take-up roller of the blocking strength measuring device of the present invention A perspective view showing the vicinity of the measuring means of the blocking strength measuring device of the present invention Schematic diagram of the blocking strength measuring device of the present invention (when viewed from the side without showing the rail and support base) Front view of the transfer frame, pull-up roller, etc. seen from the take-up roller side Perspective view of measuring means and slider Rail side view front view of rail Rail plan print area Print peeling force print area Print peeling force

Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments as long as they are within the scope of the technical idea described in the claims.

Examples of the test object to be measured by the blocking strength measuring device of the present invention include printed matter with a thick ink film that has been subjected to intaglio printing, screen printing, or the like.

The configuration of the blocking strength measuring device (1) according to the present embodiment will be described. FIG. 1 is a perspective view showing the entire blocking strength measuring device (1). In the blocking strength measuring device (1), a pulling mechanism that vertically pulls up the printed material (3) on the top of the stacked printed materials (2) and a transport mechanism that slides the printed material (3) horizontally operate simultaneously. This is a measuring device for measuring the blocking strength of a printed area (4) of a printed material (3) using a measuring means (5).

FIG. 2 is a perspective view showing the vicinity of the take-up roller (6) of the blocking strength measuring device (1). Moreover, FIG. 3 is a perspective view showing the vicinity of the measuring means (5) of the blocking strength measuring device (1).

The take-up roller (6) of the blocking strength measuring device (1) shown in FIG. 2 is a roller that is longer than the width of the printed material (3). Both axes of the take-up roller (6) are built into bearings (8) in the support base (7), and a handle (9) is attached to one axis of the take-up roller (6). installed. Therefore, when the handle (9) is turned by hand, the take-up roller (6) rotates. Note that instead of the handle (9), a motor or the like (not shown) may be attached to the blocking strength measuring device (1) and the take-up roller (6) may be rotated by the motor or the like.

The connecting means (10) is a medium that connects the take-up roller (6) and the printed matter (3) that is the object to be tested. The connecting means (10) is a flexible medium that wraps around the take-up roller (6). In addition, since the same connecting means (10) is used many times for blocking strength measurement, wrinkles or folds may occur when unwinding the connecting means (10) that has been wound around the take-up roller (6). It is also a medium with difficult folding durability. Examples of such media include belt-shaped cloth, resin films, and paper.

To measure the blocking strength of the printed matter (3), as shown in FIG. 3, first, one end of the connecting means (10) is attached to the take-up roller (6) with an adhesive tape (11). Next, pick up the edge of the topmost printed product (3), pass the end of the printed material (3) between the string (12) and the pulling roller (13), and connect the other end of the connecting means (10). and the edges of the printed matter (3) with adhesive tape (11').

As a result of pasting the adhesive tape (11) or the like, the take-up roller (6), the connecting means (10) and the printing section (3) are in a connected state as shown in FIG. Therefore, in this state, when the take-up roller (6) rotates, the connecting means (10) is wound around the take-up roller (6), and the printed matter (3), which is the object to be tested, is separated from the stacked printed matter (2). ) is pulled up in the vertical direction and peeled off, then reversed 90 degrees and moved toward the take-up roller (6).

Note that the connection between the connecting means (10) and the printed material (3) is performed every time the blocking strength of one printed material (3) is measured, so it must be possible to easily perform the connection. Therefore, as shown in Fig. 4, a thin steel plate (14) is pasted on the lower end of the connecting means (10) with double-sided tape, etc., and then the end of the printed matter (3) of the test object is attached to the lower end of the connecting means (10). By placing the magnet (15) on the upper surface of the printed matter (3), the connecting means (10) and the printed matter (3) can be easily connected. Moreover, after the blocking measurement, the connection between the connection means (10) and the printed matter (3) can be easily released by simply removing the magnet (15).

Another method for connecting the connecting means (10) and the printed matter (3) is to extract one printed matter whose blocking strength is not measured from the stacked printed matter (2) and use it as the connecting means. There is. Since this method does not require the provision of a connecting means (10), the workability of measuring blocking strength is improved. Further, as another method of connecting the connecting means (10) and the printed matter (3), there is a method in which a printed matter for which blocking strength measurement has been completed is used as it is as the connecting means (10). This method improves efficiency because blocking strength measurements can be performed continuously.

The lifting mechanism of the blocking strength measuring device (1) is composed of a pulling roller (13) and the like, and vertically pulls up the uppermost printed matter (3) of the stacked printed matter (2) by rotation of the take-up roller (6). It is a mechanism that raises the

As shown in FIGS. 3 and 5, the pulling roller (13) is a cylindrical roller made of lightweight aluminum and longer than the width of the printed material (3) (w1<w2). A core rod (16) made of resin and having a diameter smaller than the inner diameter of the pull-up roller (12) is inserted into the pull-up roller (13). Further, both ends of the core rod (16) are connected to a string (12) extending from the support (17). Therefore, the weight of the pulling roller (13), core rod (16), and string (12) always acts on the support (17).

When the take-up roller (6) rotates and the printed matter (3) moves toward the take-up roller (6) while being pressed by the pull-up roller (13), the pull-up roller (13) pulls the core rod (16). Rotate around the axis. Therefore, the printed matter (3) moves smoothly toward the take-up roller (6). Further, while the printed matter (3) is moving, the peeling force generated when the printed matter (3) is peeled off acts perpendicularly to the support column (17). At this time, the pull-up roller (13) performs an operation of pushing the pull-up roller guide (18) toward the take-up roller (6) while being in contact with the pull-up roller guide (18).

The pulling roller guide (18) is a vertically linear guide. Therefore, while the printed matter (3) is moving, the pulling roller (13) moves up and down in the vertical direction while contacting the pulling roller guide (18). Note that when the pull-up roller (13) moves downward, it is peeling off the strongly blocked print area (4), and when the pull-up roller (13) moves upward, it is peeling off the weakly blocked print area. This is when (4) is being peeled off.

The transfer mechanism of the blocking strength measuring device (1) includes a transfer frame (19), a pull-up roller (13), a pull-up roller guide (18), a core rod (16), a support (17), and a connecting means (10) (hereinafter referred to as This is a mechanism in which the transfer frame (19) and the like move in the direction of the take-up roller (6) as the take-up roller (6) rotates.

The transfer frame (19) is a lightweight frame made of aluminum, and pull-up roller guides (18) that come into contact with the pull-up rollers (13) are attached to both ends of the transfer frame (19). A slider (20) is also attached to the top of the transfer frame (19).

The pulling roller (5) moving in the direction of the take-up roller (6) pushes out the pulling roller guide (18), so that the slider (20) smoothly slides on the rail (21). .

The slider (20) has a measuring means (5) attached to the top surface of the slider (20). Further, FIG. 6 shows an exploded state of the slider (20) and the measuring means (5). As shown in FIG. 6, a hole (22) is formed in the center of the slider (20) so that a column (17) connected to the measuring means (5) projects downward.

As shown in FIGS. 7, 8, and 9, the rail (21) is a concave linear aluminum frame that extends horizontally straight above the stacked printed matter (2). In addition, since the width of the slider (20) is shorter than the inside of the concave shape of the rail (21), the slider (20) is accommodated inside the concave shape of the rail (21). Therefore, the slider (20) slides horizontally at a constant height along the rail (21).

Further, a groove (23) is provided in the central part of the rail (21), and the transfer frame (19) and the support column (17) pass between the grooves (23) and the lower part of the rail (21). It is growing to Therefore, while the slider (20) is sliding, the transfer frame (19) and the support column (17) do not interfere with the rail (21).

The contact surfaces of the rail (21) and slider (20) are smooth. Therefore, the slider (20) slides smoothly along the rail (21). Furthermore, by pasting Teflon (registered trademark) tape with a low friction coefficient on the contact surface between the rail (21) and the slider (20) and applying lubricant, the slider (20) can slide even more smoothly. Become.

The support stand (7) is a lightweight aluminum frame that holds the rail (21) etc. in an appropriate position. In addition, the blocking strength measuring device (1) may be assembled on top of the stacked printed matter (2) placed on the workbench, or the blocking strength measuring device (1) may be disassembled after the blocking strength measurement is completed. Therefore, the structure allows the support base (7) and the rail (21) to be easily connected and disassembled.

The measuring means (5) is a measuring instrument that converts the force acting on the support column (17) into an electrical signal and sends the signal to the recording means (24). The recording means (24) converts the electric signal from the measuring means (5) into data and displays and records the force measured by the measuring means (5) in time series.

In addition to the peeling force of the printed matter (3), the force measured by the measuring means (5) includes the weight of the printed matter (3), the weight of the pulling roller (13), the weight of the core rod (16), and the string (12). ) weight is included. Therefore, the force measured by the measuring means (5) divided by these weights becomes the blocking strength, which is the peeling force of the printed material (3). Therefore, before the blocking measurement, these weights are measured, the weight is set as a tare in the recording means (24), and the force measured by the measuring means (5) is divided by the tare. The exact blocking strength is displayed and stored on a display (not shown) and a data storage device (not shown) at (24).

Further, the blocking strength displayed on the recording means (24) varies greatly depending on the degree of adhesion of the printed matter, but also varies greatly depending on the shape and pattern of the printed area (4) of the printed matter (3).

For example, as shown in FIG. 10, when the printing area (4) spreads uniformly over the entire surface of the paper, the measured peeling force of the printed material (3) is a substantially constant value, as shown in FIG. 11. Therefore, the blocking strength of this printed matter (3) is a value obtained by averaging the peeling forces corresponding to the printed area (4).

On the other hand, as shown in FIG. 12, when the printed area (4) of the printed material (3) varies within the paper, the peeling force of the printed material (3) varies greatly. Therefore, the blocking strength of the printed matter (3) in this case becomes the maximum value as shown in FIG. 13.

Since the method for calculating the blocking strength differs depending on the shape and pattern of the printing area (4), an appropriate calculation formula is registered in advance in the recording means (24) for each shape and pattern of the printing area (4). When actually measuring the blocking strength, the blocking strength can be accurately measured by looking at the print area (4) of the printed material (3) and selecting an appropriate calculation method.

1 Blocking strength measuring device 2 Laminated printed matter 3 Printed matter 4 Printing area 5 Measuring means 6 Take-up roller 7 Support stand 8 Bearing 9 Handle 10 Connecting means 11 Adhesive tape 11' Adhesive tape 12 String 13 Pulling roller 14 Thin steel plate 15 Plate shape magnet 16 core rod 17 pillar 18 pulling roller guide 19 transfer frame 20 slider 21 rail 22 hole 23 groove 24 recording means

Claims (4)

A blocking strength measuring device for measuring blocking strength of laminated printed matter, comprising:
a pulling mechanism that pulls up one end of the uppermost printed matter of the stacked printed matter in a direction perpendicular to the stacked printed matter;
a transport mechanism capable of sliding horizontally relative to the other end of the uppermost printed material of the stacked printed materials while one end of the printed material is vertically pulled up by the lifting mechanism;
a hoisting mechanism that allows the lifting mechanism and the transfer mechanism to operate simultaneously;
Measuring means connected to the lifting mechanism and measuring blocking strength between the stacked printed matter;
A blocking strength measuring device comprising: The transfer mechanism includes at least
the horizontally extending support frame;
The blocking strength measuring device according to claim 1, further comprising a drive section that drives the pulling mechanism along the support frame. 3. The blocking strength measuring device according to claim 1, wherein the winding mechanism is a roller that winds up the uppermost printed matter of the stacked printed matter. A blocking strength measuring method for measuring blocking strength between stacked printed matter, comprising:
placing the stacked printed matter on a flat surface;
fixing one end of the uppermost printed matter of the stacked printed matter to a fixing part;
pulling up one end of the fixed printed matter in a direction perpendicular to the stacked printed matter;
sliding one end of the fixed printed matter relative to the other end of the top printed matter of the stacked printed matter in a direction parallel to a plane;
a measuring step of measuring with a measuring means the force acting on the support when the printed matter is peeled off due to sliding of one end of the printed matter;
A method for measuring blocking strength, comprising:

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