JPH052921B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous thickness measuring device for thin materials, and more particularly, a front drive roller, a front driven roller provided upwardly facing the front drive roller so as to be able to come into contact with the front drive roller, and a front drive roller. In order to measure the thickness of the running thin material inserted between the roller and the front-stage driven roller, upper measuring units are installed in a pair at the rear stage in the feeding direction of the thin material so as to sandwich the thin material from above and below. and a lower measuring element, a rear-stage drive roller provided for pulling the thin material whose thickness was measured by the measuring element, and a rear-stage drive roller provided facing upward so as to be able to come into contact with the rear-stage drive roller. The present invention relates to a thin material thickness continuous measuring device equipped with a rear driven roller.

Conventionally, in order to continuously measure the thickness of a thin material, as shown in FIG.
and the rear drive roller 3a and the rear driven roller 6b.
and while feeding the thin material by both of them,
The thickness of the thin material is continuously measured by the measuring element 1. FIG. 2 is a side view of FIG. 1, showing a state in which the thin material 4 is sandwiched between the driving roller and the driven roller.

In this case, if the thin material to be measured is, for example, 0.1 mm thick aluminum foil, or a plastic film or sheet such as polyethylene, polypropylene, or polyvinyl chloride, the thin material itself does not have sufficient rigidity. In the free state, the tip of the thin material does not get in between the probes. Therefore, the probe is set with the leading end of the thin material being fed into the rear feed roller 3, the thin material is fed by being pulled by the rear roller, and measurement is started. Therefore, the tip of the thin material to be measured 50
Measurements of approximately mm cannot be obtained. Also,
As the measurement progresses and the end of the thin material leaves the front feed roller 2, if the end of the thin material is curled, the inclination caused by the curl will cause an error in thickness measurement, for example as shown in Figure 3. If the thin material 4 with a thickness of 100 μm has an inclination of 10° due to curling,
The measured value is 101.54 μm. That is,
Conventional equipment does not provide accurate thickness measurements at both ends of the thin material being measured.

On the other hand, for example, aluminum sheets with a thickness of 0.2 to 0.3 mm, which are used as the base of printing plates using photosensitive resin, are manufactured as rolled sheets with a width of 1 to 1.9 meters and wound into rolls, but in order to be used as printing plates, Inspect thickness uniformity and flatness. For this purpose, as shown in Fig. 4, a strip sample 6 with a width of 28 to 35 mm is taken in the transverse direction of a roll-wound aluminum sheet 5, and the entire length, that is, the change in thickness between both edges of the roll-wound sheet, is continuously measured. Measure.

In this case, it is particularly important to measure the thickness at both edges of the rolled sheet, ie at both ends of the thin strip sample. In other words, the thickness of both edges of a rolled sheet needs to be uneven, and more importantly, if the thickness of both edges of a rolled sheet is thicker than the thickness of the sheet itself, the inside of the sheet will be uneven during rolling. This is because the plate may have sagging, wrinkles, etc., making it unusable as a printing original plate. Therefore, measuring the thickness of both ends of the strip sample 6 taken as a measurement sample is extremely important for material inspection in the production of printing plates.

Nevertheless, in the conventional thickness measurement mentioned above,
Due to inaccurate measurements at both ends of the sample, when using rolled sheets, product standards management
The range that can be accurately measured as a sample, that is, the fourth
Only the area between X and Y in the diagram is valid, and the other shaded areas are deemed to be non-standard and have been largely removed.Also, wrinkles, etc., were found on the sheet inside the roll, resulting in a decrease in product yield. It was difficult to prevent this from happening.

As a countermeasure for this, as shown in Fig. 5, dummy pieces 7 thicker than the sample are connected to both ends of the strip sample 6 using adhesive tape 8, etc., and the extended strip sample 6 is then hung on the measuring device. Therefore, a method was attempted in which the thickness of sample 6 was continuously measured from the tip to the end. However, even with this method, the measurements at the ends of the strip sample 6 were found to be inaccurate. This is because the adhesive tape 8 used to connect the strip sample 6 and the dummy piece 7 is glued to both edges of the sample so that it does not hit the measuring tip, and during measurement, the adhesive tape 8 is attached to both edges of the sample so as not to cause any sagging on the sample. Because tension is applied to the sample by slightly changing the rotational speed of the feed rollers before and after the sample, the center part of the end of the sample that is not connected with the adhesive tape separates from the dummy piece, causing lifting. it is conceivable that. Therefore, even with this method, accurate measurements of the thickness at both ends of the strip sample, ie, at both edges of the original rolled sheet, cannot be obtained.

In addition, for measuring the thickness of the strip sample 6, a second
It has been found that the pinch width l of the feed roller shown in the figure also has an effect. That is, conventionally, the pinch width l of the sample feeding roller has been used to be larger than the width d of the strip sample, and therefore, if the direction in which the sample is inserted into the roller is even slightly deviated, the pinch width l of the sample feeding roller is larger than the width d of the strip sample. As the sample held between the rollers moves, diagonal tension is applied to the advancing sample between the two feed rollers 2 and 3, which may cause diagonal wrinkles in thin samples, which may adversely affect thickness measurement. be.

The present invention solves these problems and makes it possible to accurately and continuously measure the thickness of a thin film strip sample with low rigidity, such as a thin aluminum sheet or a soft plastic sheet, from its tip to its end. The present invention provides a device for continuously measuring the thickness of thin materials.

That is, the present invention includes a front-stage drive roller, a front-stage driven roller provided upwardly facing the front-stage drive roller so as to be able to come into contact with the front-stage driven roller, and a running thin material inserted between the front-stage drive roller and the front-stage driven roller. An upper gauge head and a lower gauge head are provided as a pair to sandwich the thin material from above and below at the rear stage in the feeding direction of the thin material, and the thickness is measured by the gauge head. A thin material thickness continuous measuring device comprising: a rear drive roller provided to pull the thin material; and a rear driven roller provided upwardly and facing the rear drive roller so as to be able to come into contact with the latter drive roller. The upper part of the front drive roller, the detection tip of the lower measuring element, and the upper part of the rear drive roller are provided at a position to support the lower surface of the thin material that is traveling, and have a width that is equal to or narrower than the width of the thin material. a hole for a front-stage drive roller for contacting the lower surface of the thin material;
a work base having a hole for a lower measuring element and a hole for a rear driving roller, and a work base having a hole for a lower measuring element and a hole for a rear driving roller, and a work base having a work base having a hole for a lower measuring element and a hole for a rear driving roller; and a side guide disposed in the hole for the front drive roller, which is suspended between the roller shaft of the front driven roller and the roller shaft of the rear driven roller in order to press the thin material against the workspace side by its own weight, and a side guide arranged in the front drive roller hole to press the thin material against the workspace side by its own weight. An upper work guide having a pressure contact portion that presses a thin material at a portion reaching the roller hole, and an upper contact point hole provided for bringing the detection tip of the upper contact point into contact with the upper surface of the thin material. This is a continuous thin material thickness measuring device characterized by comprising:

EMBODIMENT OF THE INVENTION Hereinafter, as an embodiment of the present invention, an apparatus for continuously measuring the thickness of a strip sample taken from a rolled aluminum sheet with a thickness of approximately 0.3 mm for use as a printing plate will be described with reference to the drawings.

FIG. 6 is a front view showing the essential parts of the measuring device of the present invention without the side guide on the right side in the running direction of the sample, and FIG. FIG.

In Fig. 6, the upper and lower gauge heads 11 and 12 each have a hemispherical tip with a half diameter of 3 mm and a diamond tip at the tip, and each is adjusted to have a measuring pressure of 30 g. The thickness change is measured by detecting the differential.

In front of the probe is a front feed roller 13 consisting of a drive roller 14 and a driven roller 15;
After the lower measuring elements 11 and 12, a rear feed roller 16 consisting of a driving roller 17 and a driven roller 18 is provided.
Vertical measurements 11, 12 on the running line of the sample by both
The contacts are placed so that they are aligned. The rollers that make up each feed roller have a diameter of approximately 30 mm and a width of 5 to 5 mm.
The roller surface is made of a material with a high coefficient of friction such as urethane rubber.

Between the drive roller 14 of the front feed roller 13 and the drive roller 17 of the rear feed roller 16, there is a width of 28 mm for receiving the lower surface of the strip sample 6 that is continuously running.
A work base 19 is fixed, and a lower measuring element hole 22 is provided in the work base 19 at the position of the measuring element 12. Further, the work base 19 is provided with a hole 20 for a front drive roller and a hole 21 for a rear drive roller at the pinch portions of the front and rear feed rollers 13 and 16, respectively, and is extended back and forth as appropriate. Figure 12 shows such a work base 19
A top view is shown, and a sectional view taken along the line C-C is shown in FIG. The surface of the workspace 19 is buffed with hard chrome plating to give it a high degree of smoothness. The upper surface of the work base 19 has a line connecting the upper edges of the drive rollers of the front and rear stage feed rollers 13 and 16;
That is, 0.2 from the running line of strip sample 6.
It is desirable to set it lower by mm.

Side guides 32 and 33 are provided on both sides of the water base 19 to restrict both edges of the running strip sample 6. This side guide 32 and 3
3 is adjusted in the range of 28 to 35 mm according to the width of the strip sample 6 using an arbitrary adjustment mechanism (not shown). The inner surface of the side guide 32 is impregnated with cyanide (tufftride processing) to provide slipperiness.

An upper work guide 23 is installed between the two driven rollers 15 and 16. This work guide 23 has a shape as shown in FIGS. 8 to 12, for example, in a front view, a BB sectional view, a top view, and a bottom view, respectively, and a pair is provided at each end of the work guide 23. The arm supports 30 and 31 are suspended from the rotating shafts on both sides of the driven rollers 15 and 16, respectively. A Teflon plate is attached to the press-contact portion 24 on the lower surface of the upper work guide 23, and its lower surface is exactly in contact with the upper surface of the lower work base 19 in the absence of a sample.
The position of the upper work guide 23 is determined by adjusting screws 26 and 2 in screw holes 28 and 29 provided on the receiving seats at both ends.
7 allows the suspension to be adjusted. The receiving seat 31 of the arm suspended from the shaft of the driven roller 18 of the rear-stage feed roller 16 is slightly bent due to escape when the driven rollers 15 and 18 in the front and rear stages are lifted upward before mounting the measurement sample. It has been made wider.

An upper workpiece guide 23 is also provided with an upper contactor hole 25 corresponding to the contactor hole 2 provided in the lower work base 19, and this hole allows the upper and lower contactors 11 and 12 to be connected to each other. The thickness is then measured.

The upper work guide 23 uses its own weight to press the strip sample 6 between its pressure contact part 24 and the work base 19 to ensure the flatness of the sample, and its weight is approximately 250 g. . In the case of a sample with high rigidity and strong warpage, it is necessary to increase the weight of the upper work guide.

The running speed of the strip sample 6 by the front and rear feed rollers 13 and 16 is arbitrary, but from the viewpoint of measurement time and measurement accuracy, a speed of about 300 to 1000 mm/min is adopted. When the strip sample 6 is run by each of the feed rollers 13 and 16, the circumferential speed of the rear drive roller 17 is adjusted to the front drive roller 14 so as not to cause sagging on the sample.
It is necessary to apply tension to the sample at all times while the sample is running at a speed slightly higher than the circumferential speed of the sample.

To measure the thickness, lift the driven rollers 15 and 18S about 10 mm upwards, pass the tip of the strip sample 6 past the front drive roller, and insert the upper and lower measuring probes 11 and 12.
Place the strip sample 6 on the workspace 19 in front of the strip sample 6, lower the driven roller 15, and hold the tip of the strip sample 6 against the end of the upper work guide 23. Next, when driving of the drive roller 14 is started, the strip sample moves forward, and the measurement starts when the tip of the strip sample enters the contact point between 11 and 12. Followed roller 15
and 18 are simultaneously moved up and down by a lever mechanism (not shown). The strip sample 6 moves forward, is pinched by the rear-stage feed rollers, and then travels further until the rear end of the strip sample 6 passes the measuring tip, at which point the measurement ends.

For the same strip sample 6, repeat the measurement by reversing the sample insertion and setting the rear end from the previous measurement as the tip, and check the reproducibility of the thickness measurement from the two measured values.

Thin materials that can be measured with the device of the present invention include metal thin materials such as the aluminum sheet mentioned above,
There are synthetic resin sheets such as polyvinyl chloride, nylon, polyethylene, and polypropylene. There are no particular restrictions on the thickness of the sample to be measured, but generally
A range of 0.1 to 1.0 mm is suitable, and the characteristics of the device according to the invention make it particularly advantageous for thickness measurements of thin plates with a thickness of 0.1 to 0.3 mm.

In the apparatus of the present invention, the continuously running strip sample is pressed against the work base 19 by the upper work guide 23, so that the strip sample 6 is always measured in a flat state. No measurement errors. Also, when the tip of the strip sample 6 to be measured gets in between the upper and lower probes at the start of measurement, the sample 6
Since the probe is pressed onto the work base by the upper work guide 23 and inserted between the contact points of the upper and lower probes, it is easy to insert even a weak and thin sample.

In addition, by placing the work base 19 slightly lower than the sample travel line, when the contact point of the contact point at the zero point is interrupted, the amount of displacement of the contact point is kept to the necessary minimum, thereby preventing the occurrence of transient phenomena. It is possible to suppress the measurement error of the end face.

The feed rollers 13 and 16 sandwich the sample between the drive roller holes in the work base, and the pinch width is the width of the strip sample 6 that is pressed against the upper work guide.
Since the width of the strip is narrower than the width of the strip sample and the pinch is made at the center of the strip sample, the problem of parallelism of sample running is alleviated. That is, since the pinch width is narrow, slight diagonal travel is corrected by the work guides on both sides, and wrinkles and sagging do not occur on the sample. This direction correction is difficult in a pinch caused by a wide roller. Further, the sample is held flat by the work base 19 except for the narrow pinch portion and the probe portion.

The device of the present invention has the above-mentioned configuration, and is capable of accurately measuring the thickness up to the edge of a weak strip sample.In the case of manufacturing a wide rolled sheet, it is possible to measure the thickness of a collected strip sample. If the value is within the standard value, it is not necessary to cut and remove both edges of the roll, and it is possible to eliminate waste caused by cutting and removing the edges, which was conventionally performed due to inaccurate measurements. In addition, once the sample is inserted between the work base and the upper work guide, the drive roller and driven roller automatically move the sample, preventing excessive force that may cause wrinkles on the sample for thickness measurement. In the case of manufacturing narrow sheets, it is possible to incorporate the device according to the invention into the production line, and the thickness can also be measured continuously while the sheets are being manufactured.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of a conventional thickness measuring device;
The figure is a side view of the feed roller of FIG. 1. FIG. 3 is an explanatory diagram of measurement error in thickness measurement of a sample with curled ends. FIG. 4 shows the collection of strip samples from a roll of rolled aluminum sheet. FIG. 5 shows a strip sample with a dummy piece attached. Figure 6 is a front view of the continuous thickness measuring device of the present invention, with the front side guide removed;
The figure is a top view below the sample running surface in FIG. 6. 8 is a front view of the upper work guide shown in FIG. 6, FIG. 9 is a sectional view taken along line BB in FIG. 8, FIG. 10 is a top view, and FIG. 11 is a bottom view. Figure 12 is a top view of the work base used in Figure 6.
FIG. 3 is a sectional view taken along the line C--C in FIG. 12. The correspondence between the main parts illustrated and the symbols is as follows. 1... Measuring head, 2, 3... Feed roller, 4...
Thin material, 5... Aluminum rolled sheet, 6... Strip sample, 7... Dummy piece, 8... Adhesive tape, 11, 12... Measuring element, 13... Pre-stage feed roller, 14, 17... Drive roller , 15, 18...
...Late stage driven roller, 16...Late stage feed roller, 1
9... Work base, 23... Upper work guide, 24... Pressure contact part, 26, 27... Adjustment screw,
32, 33...Side guide.

Claims (1)

[Scope of Claims] 1. A front drive roller 2b, a front driven roller 2a provided upwardly facing the front drive roller so as to be able to come into contact with the front drive roller, and a front drive roller inserted between the front drive roller and the front driven roller. In order to measure the thickness of a traveling thin material, an upper measuring element and a lower measuring element 1, 1 are provided in a pair at a later stage in the feeding direction of the thin material so as to sandwich the thin material from above and below; A rear-stage driven roller 3b is provided to pull the thin material whose thickness has been measured by a roller, and a rear-stage driven roller 3a is provided facing upward and capable of coming into contact with the rear-stage driven roller. In the thin material thickness continuous measuring device, the measuring element is provided at a position supporting the lower surface of the traveling thin material, has a width equal to or narrower than the width of the thin material, and has an upper and lower measuring element of the front drive roller 14. a work base 19 having a hole for a front drive roller, a hole for a lower gauge stylus, and a hole for a rear drive roller, respectively, for bringing the detection tip and the upper part of the rear drive roller 17 into contact with the lower surface of the thin material; side guides 32 and 33 disposed on both sides of the traveling path from at least the front drive roller to the rear drive roller so that the upper and lower measuring elements measure the center of the thin material; a pressure contact part that is suspended between the roller shaft of the front driven roller and the roller shaft of the rear driven roller to press against each other by its own weight, and presses the thin material at a portion from the front drive roller hole to the rear drive roller hole; , an upper work guide 23 having an upper measuring element hole provided for bringing the detection tip of the upper measuring element into contact with the upper surface of the thin material. Device. 2. The upper surface of the work base 19 is installed slightly lower than a line connecting the contact point between the front drive roller 14 and the front driven roller 15 and the contact point between the rear drive roller 17 and the rear driven roller 18. The equipment described in section.