JPH0712965U - Rolled material tightness measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain a winding tightness measuring device for rapidly measuring and arithmetically processing a winding tightness profile of a winding using ultrasonic waves over the entire amount of the winding. [Configuration] A measuring unit provided with an ultrasonic oscillator and a receiver, and a plurality of sets of measuring units can be swiftly wound on a roll,
It is composed of a measurement side device composed of a supporting device which can be contacted evenly, and a measurement control device centering on a CPU for performing quick measurement control, totaling and printing out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wound material tightness measuring device for measuring the tightness over the entire width of a wound material such as a wound paper or a plastic film wound body using ultrasonic waves.

[0002]

[Prior art]

 The physical properties from one end to the other end in the width direction of one roll need to be as uniform as possible, and if it is uniform, there is no problem, but unevenness in the width direction of the manufacturing equipment, uneven distribution of raw materials However, due to improper operation, etc., a non-uniform roll in the width direction (axial direction of the roll) may be obtained. Even a very slight non-uniformity will be superposed when taken as a roll.

[0003] When a wound product having non-uniform physical properties in the width direction is shipped and used in another process such as printing or processing, various troubles are caused. For example, the occurrence of wrinkles and sagging, misalignment of printing, cutting, etc.

The main physical properties required to be uniform include tensile strength, elongation, thickness and the like, and the water content is one of them in paper.

The thickness and water content of one sheet forming a roll can be continuously measured during the production process, and the measurement result is often fed back and automatically adjusted, but more precise width-direction uniformity. Is not enough to maintain.

There is no method for measuring the tensile strength and elongation in the flow direction in the width direction of the roll, that is, the axial direction of the roll in the production process. A method is used in which a sample is taken over the entire width of an object and the tensile strength and elongation of each part in the width direction are statically measured one by one.

In any case, it suffices if the physical properties of all parts in the width direction are uniform, but in reality it is impossible to realize, and there is no choice but to allow a certain width of variation.

For example, if there is a portion in the width direction in which all the physical properties are slightly worse than other portions, it can be easily predicted that the portion may cause the above-mentioned trouble.

However, in the case where good physical properties and bad physical properties are mixed, it is difficult to predict whether or not that portion will cause a trouble.

At the production site, generally, instead of the method of predicting the trouble occurrence part from the individual measured values of each physical property described above, a hammer or the like is used over the entire width of the surface of the wound material from one end to the other end. There are adopted a tapping method that determines the presence or absence of abnormalities by tapping and the tapping sound when hitting, and a method of measuring the presence or absence of abnormalities by using a hardness meter over the entire width and using hardness meter measurement values.

It is said that the method using a hardness meter should have a lower surface hardness, regardless of the individual physical properties of each part, and the part where trouble is likely to occur is wound more loosely than the other parts. It is used based on the idea.

As an alternative to the above-mentioned two methods, there is used a method of judging whether or not the trouble of the wound material is likely to occur from the difference in the propagation velocity of the ultrasonic waves.

The propagation velocity of ultrasonic waves in a sheet-like object has a high correlation with tensile strength and elongation, and is highly sensitive to changes in water content. Of course, the measurement results can be shown numerically, and the influence of measurement conditions is minimal.

Furthermore, when a large tension is applied to the sheet-shaped object sample, there is a fact that the propagation speed of ultrasonic waves becomes high, and it is characterized in that it also reacts to the magnitude of internal stress.

However, the sensitivity to the difference in thickness is low.

A conventional example of a measuring device utilizing ultrasonic waves is configured as shown in FIGS. 7 and 8.

The sensor unit 30 and the display unit 31 are provided, and an oscillator 32 and a receiver 33 are attached to the sensor unit 30 at predetermined intervals, and the oscillator 32 is attached to a control unit 36 via an oscillation circuit 34. The geophones 33 are respectively connected to the control unit 36 via the vibration receiving circuit 35, and the control unit 36 is connected to the display unit 31.

The measurement principle will be described with reference to FIG. The oscillator circuit 34 oscillates a pulse current in response to a signal from the controller 36, and the oscillator 32 oscillates in response to the pulse current to oscillate an ultrasonic pulse.

When the tip ends of the oscillator 32 and the vibrator 33 are brought into contact with the sample 37, an ultrasonic pulse from the oscillator 32 propagates in the sample 37 to vibrate the vibrator 33, and the vibration receiving circuit 35 to the control unit 36. An incoming signal is transmitted to. The control unit 37 measures the time until the ultrasonic pulse from the oscillator 32 is received by the receiver 33.

The measurement time can be displayed on the display unit 31 or can be converted into a sound velocity and displayed by the control unit 36.

FIG. 8 shows the case where the sample 37 is a single layer, and in this case, the sample 37 is placed on the sound absorbing plate 38 for measurement. The state in which the ultrasonic pulse 39 propagates in the sample 37 is schematically shown. The sample 37 is also shown by enlarging the thickness. The actual sample 37 is extremely thin like one sheet of paper and one sheet of film.

The tip distance between the oscillator 32 and the image receiver 33 is determined depending on the type of the sample 37. The ultrasonic pulse 39 propagating through the sample 37 is attenuated as the distance from the oscillator 32 increases, and the shorter the distance between the oscillator 32 and the receiver 33, the greater the vibration in the receiver 33.

However, if the distance is short, the time required for the oscillator 32 to reach the geophone 33 is shortened, and the error of the measured value becomes large. If the oscillation frequency is high and the pulse width is narrow, the error will be small.

For the reasons described above, the oscillation frequency, the pulse width, and the distance between the oscillator 32 and the geophone 33 are selected. For example, it is set to 25 KHz, 150 mm or the like.

As shown in FIG. 9, a bimorph type piezoelectric element having the same shape is usually used for the oscillator 32 and the vibrator 33. When the oscillator 32 vibrates in the direction of arrow F due to the oscillating current from the oscillator circuit 34, the ultrasonic wave propagating through the sample 37 causes the vibrator 33 to vibrate in the direction of arrow G to generate a current, which is received by the vibration receiving circuit 5.

The sound absorbing plate 38 shown in FIG. 8 is provided in order to avoid noise other than the measurement sound waves such as reflected sound and resonance sound from things other than the ultrasonic sample 37, and to prevent the sample 37 from contacting with the oscillator 32 and the geophone 33. In order to improve the measurement, the measurement is usually performed under the sample 37. The sound absorbing plate 38 is made of sponge rubber or the like.

When the object to be measured is the object to be measured 12 as shown in FIG. 7, the sensor unit 30 is brought into contact with the object to be measured 12 as shown in the drawing. In this case, the sound absorbing plate is not necessary because the sample is thick enough. The sensor section 30 is sequentially moved in the axial direction of the material to be wound 12 to obtain measured values at required locations, each measured value is aggregated, and an axial profile diagram of winding tightness as shown in FIG. 4 is obtained. To get

[0028]

[Problems to be solved by the device]

 It seems that the tapping method can obtain relatively good judgment results, but unless a skilled person can obtain reliable judgment results, there are individual differences, and the judgment results of the physical condition of the judge are also good. Affect.

Further, the fact that the judgment result cannot be shown by a numerical value is also a big drawback.

The method using a hardness meter is a method in which the determination result can be shown by a numerical value, and the influence of measurement conditions such as individual differences is less than that in the tapping method.

However, this method also has drawbacks, and its sensitivity to changes in tensile strength and elongation is low.

For this reason, there are many cases in which a trouble occurs when the wound material is used even if the determination result is good.

In the conventional measuring device using ultrasonic waves, when it is attempted to obtain a winding tightness profile of the winding material in the axial direction (width direction) of the winding material, a large number of windings are required over the entire width of the winding material. Needs measurement points. Therefore, it takes a long time to measure, and it is difficult to deal with the case where it is necessary to measure a large amount of a large number of rolls produced in large quantities, and the measurement may cause a decrease in production.

If the two sensors (oscillator and receiver) of the sensor unit are always maintained in parallel with the end face of the winding material, that is, in the direction perpendicular to the axis of the winding material, the measured value will be in error. To produce.

Therefore, it is necessary to use a fine nerve for the position of the sensor at each measurement, which causes a pain to the measurer, and has a drawback that the measurement time for each measurement becomes long.

Therefore, a fine nerve is not required for the position of the sensor at the time of measurement, a large number of measurement values can be obtained accurately in a shorter time, and thus a winding tightness profile can be displayed quickly and accurately using ultrasonic winding. Providing a tenacity measuring device has been an issue.

[0037]

[Means for Solving the Problems]

 The present invention has devised the following means in order to solve the above problems.

In the wound material tightness measuring device using ultrasonic waves, the measuring side device comprises a measuring side device and a measurement control device, and the measuring side device comprises a plurality of sets of measuring units and a supporting device. The unit consists of an ultrasonic oscillator and a receiver of the same shape fixed at fixed intervals, the supporting device consists of a supporting rod, a connecting body and a frame, and the connecting body consists of a measuring unit connecting body and a supporting rod connecting body. , A plurality of sets of measuring units are attached to a long supporting rod via a connecting unit of measuring units so that they can be swung and buffered at approximately equal intervals so that the direction of each measuring unit is perpendicular to the supporting rod. The supporting rod is attached to the frame so as to be movable in the axial direction of the winding to be measured, the direction perpendicular to the axial direction, and the vertical direction via the support rod connecting body, and the measuring unit is connected to the computing unit. It The ultrasonic oscillation and measurement control device of each measurement unit connected to each consists of a CPU, oscillator, transmission switching circuit, reception switching sea line, geophone and output display device, and each measurement unit performs measurement. It is connected to the transmission switching circuit and the reception switching circuit of the control device respectively, and moves all the above-mentioned connecting bodies, ultrasonic oscillation of each measurement unit, vibration reception, transmission / reception switching, measurement, measurement aggregation and output display. The invention is a device for measuring the tightness of a wound material, which is controlled by the CPU.

[0039]

[Action]

 With a structure that allows multiple pairs of ultrasonic oscillation / vibration units to maintain accurate contact in the direction perpendicular to the axis, regardless of the size of the wound material, the width (axial length) of any The widthwise profile of the winding hardness (winding tightness) of the wound product can be accurately measured in an extremely short time.

The configuration of the present invention will be described with reference to the embodiments shown in FIGS.

The winding material tightness measuring device of the present invention comprises a measuring side device 1 and a measuring control device 2 as shown in the electric circuit diagram of FIG.

FIG. 1 and FIG. 2 show the measurement side device 1. The measurement side device 1 is composed of a plurality of sets of measurement units 3 and 3 and a supporting device 4.

As shown in FIGS. 1 and 3, in one set of measurement units 3, an ultrasonic wave oscillator 5 and a vibration receiver 6 of the same shape are arranged at regular intervals in an arm 13 via a vibration absorber 4. It will be fixed.

The support device 4 comprises a support rod 7, a connecting body and a rigid frame 9.

The connecting body 8 includes a plurality of measuring unit connecting bodies 10 and a support rod connecting body 11.

The plurality of sets of measuring units 3 and 3 are measured at substantially equal intervals so that the longitudinal direction of each measuring unit 3 is at a right angle to the supporting rod 7 at the center of gravity thereof. They are attached via the unit connecting bodies 10, respectively.

The measuring unit connecting body 10 allows the measuring unit 3 to swing in the direction of the double arrow A, and also to buffer in the vertical direction (B direction) via the buffer 15.

The support rod 7 is attached to the frame 9 via a support rod connecting body 11.

The support rod connecting portion 16 of the support rod connecting body 11 allows the support rod 7 to swing in the double arrow C direction.

Further, the support rod connecting body 11 is provided with an axial moving portion 17, a moving rod 18, a lateral moving portion 19, and an elevating portion 29.

The support rod connecting body 11 is movable on the frame 9 in the axial direction (the double arrow D direction) via the axial movement portion 17 and the movement rod 18, and via the lateral movement portion 19. The movable rod 18 is movable in the lateral direction (double arrow E direction).

If the support rod connecting portion 16 is formed of a ball bearing, the support rod 7 can swing not only in the direction of the double arrow C but also in the double arrow AC.

As shown in FIG. 5, the measurement control device 2 includes a CPU 20, an oscillator 21, a wave transmission switching circuit 22, a wave reception switching circuit 23, a geophone 24, and an output display device 25.

The output display device includes an output device 26 and a display device 27 in the illustrated example. An amplifier 28 for amplifying the received wave is preferably provided between the geophone 24 and the CPU 20.

The oscillators 5 and 5 of the respective measurement units 3 and 3 are connected to the wave transmission switching circuit 22, and the geophones 6 and 6 are connected to the wave receiving switching circuit 23, respectively.

Operation of the measuring unit automatic moving device such as movement of the connecting body 8 on the frame 9 and movement on the moving rod 8, oscillation of ultrasonic waves of each measuring unit 3, vibration reception, transmission / reception switching, measurement, The CPU 20 performs all control of measurement aggregation and output display.

FIG. 6 shows the configuration of the CPU 20, the relationship with each measuring device and circuit, and the flow of each signal.

The CPU 20 is composed of a moving device operating means, an oscillator operating means, a geophone operating means, a wave transmission switching circuit switching means, a wave receiving switching circuit switching means, and a calculation analysis output means.

The moving device operating means is the measuring unit automatic moving device, the oscillator operating means is the oscillator 21, the geophone actuating means is the geophone 24, the transmission switching circuit switching means is the transmission switching circuit 22. The wave switching circuit switching means outputs an operation signal to the wave receiving switching circuit 23, respectively, and the arithmetic analysis output means inputs the output signal from the geophone 24 through the amplifier 28 and outputs it to the output display device 25.

In the example of FIG. 1, the shock absorber 15 is shown in which the piston 42 can be moved up and down in the cylinder 40 via the springs 41.

The support rod 7 is adjustable up and down by a support rod connecting body 11 in the direction of the double arrow B in FIG.

As shown in FIG. 2, if the distance measuring sensors 43 are provided on the measuring units 3 and 3 at the left and right ends of the supporting rod 7, respectively, the measuring units 3 and 3 are applied to the measured material 12. Upon contact, the elevating part 29 of the supporting rod 7 can be moved up and down via the CPU 20.

The measurement is performed as follows. The to-be-measured roll 12 is carried by a carrier of a roll feeding device such as a separately provided conveyor, and is set at a measurement position.

At the measurement position, the V groove 44 for positioning shown in FIG. 1 and the like is provided, and the wound product 12 is positioned.

Next, the lateral moving portion 19 of the connecting body 8 is driven to move the support rod 7 on the axis of the winding material 12, and the elevating portion 29 which is an automatic measuring unit moving device is driven to perform each measurement. The oscillator 5 and the vibrator 6 of the unit 3 are evenly contacted with the winding material 12.

Due to the swinging function of the measuring unit connecting body 10 and the supporting rod connecting body 11 and the buffering function of the shock absorber 15, the oscillators 5, 5 and the vibrators 6, 6 are wound at a substantially uniform contact pressure. 12 is abutted.

If the distance measuring sensors 43, 43 are provided, when the support rod 7 descends, the descending speed is set to a very small speed when the oscillator 5 and the image receiver 6 approach the winding material 12, and both distance measuring sensors are arranged. It is possible to automatically stop the lowering of the support rod 7 by the measuring unit automatic moving device at the position where the distance measurement signals from 43 and 43 are the same.

The oscillator 21 sends an oscillating wave signal to the wave transmission switching circuit 22 according to a command signal from the CPU 20, and the wave transmission switching circuit 22 and the wave receiving switching circuit 23 are controlled to switch according to the command signal from the CPU 20 to perform a predetermined switching selection. Ultrasonic waves are sent from the oscillator 5 at the position to the winding product 12 as shown in FIG.

The ultrasonic wave is sent out as an ultrasonic pulse, propagates in the winding material 12 as shown by a path 45, and vibrates the geophone 6 paired with the oscillator 5.

Bimorph piezoelectric elements of the same shape are used for the oscillator 5 and the vibrator 6, and the sensitivity is increased by keeping the vibration direction in a predetermined direction. It is for this reason that the longitudinal direction of the measuring unit 3 is held at right angles to the axis of the winding material 12, and in the present invention the measuring unit 3 is always held in the required direction.

The pulse current generated by the oscillator 21 causes the oscillator 5 to vibrate at, for example, 25 KHz, and an ultrasonic pulse having high directivity is sent to the winding material 12. The frequency can be appropriately selected depending on the material, size, etc. of the material 12 to be wound.

The ultrasonic pulse propagates while diffusing on the surface of the winding material 12 and in the winding material 12, and the earliest ultrasonic pulse reaches the geophone 6 and vibrates the geophone 6. Generate a piezoelectric pulse.

By measuring the time from the ultrasonic pulse oscillation of the oscillator 5 to the reception of the first wave of the propagating ultrasonic pulse by the receiver 5, the propagation time between the oscillator 5 and the receiver 6 can be found. , CPU20 gives the propagation velocity.

In most cases, the first wave is not a surface wave but a wave (longitudinal wave) propagating in the winding material 12.

A number of tests conducted in advance have revealed that the propagation speed and the winding tightness of the winding material 12 have a high correlation.

The measurement unit 3 is sequentially switched by a command signal from the CPU 20, and the measurement value at the contact position between each measurement unit 3 and the winding material 12 is obtained.

When the length of the winding material 12 in the axial direction is larger than the length of the support rod 7, the axial moving unit 17 is driven to move the support rod 7 to a predetermined position, and the same measurement as described above is performed. To do.

The obtained plurality of measured values are processed by the CPU 20, and are printed out from the output display device 25 as a profile of the axial winding tightness of the wound product 12 as shown in FIG. The time required is several tens of seconds.

FIG. 6 shows a flow sheet of the flow of signals inside the CPU 20, the operation of each device outside the CPU 20, and the flow of ultrasonic signals. In FIG. 6, the winding material feeding device indicates that the winding material 12 is fed by means other than the winding tightness measuring device, for example, by a conveyor, etc. The winding material positioning device is a winding tightness measuring device. It shows what to do in.

The profile is a profile of propagation velocity in each measuring device, and is a relative value, and an absolute value profile is not necessary. Wrinkles, sagging, etc., occur in the sheet obtained from the wound product when there is unevenness in the winding hardness of the wound product in the axial direction.To determine whether there is unevenness, the profile of the propagation velocity is used. This is enough, and this makes it possible to predict defects in the wound sheet and prevent problems from occurring very quickly.

In the above-described measuring device, the case where the measured object is set at a fixed measurement position and the measurement is performed in a stationary state has been described. However, in some cases, the measured object on the flowing conveyor may be measured. Requested. In this case, the measurement side device is moved in synchronization with the movement of the wound material during the measurement time (which is sufficient for several seconds).

[0082]

[Effect of device]

 With the winding tightness measuring device of the present invention, it is possible to extremely quickly print out the winding tightness at each position in the axial direction of the roll, and thus the winding tightness profile. As a result, a profile for each roll of the wound material is obtained.

With this device, it is possible to predict individual defects of the material to be wound and prevent troubles from occurring in advance, and it is also possible to provide feedback to the production site, so that productivity can be improved and quality can be uniformly improved quickly. It has an excellent effect of being able to.

[Brief description of drawings]

FIG. 1 is a schematic elevational view of an embodiment.

FIG. 2 is a schematic side view of the embodiment.

FIG. 3 is an enlarged partial elevational view showing a contact state of the measurement unit and the winding material.

FIG. 4 is an example of a printout diagram of a profile of measured values.

FIG. 5 is a block diagram showing a relationship between a measurement control device and a measurement side device.

FIG. 6 is a flow sheet.

FIG. 7 is a schematic elevational view of a conventional example.

FIG. 8 is an enlarged schematic elevational view of a conventional example.

FIG. 9 is a principle explanatory view showing the vibration directions of an oscillator and a vibrator.

[Explanation of symbols]

 1 Measuring Side Device 2 Measurement Control Device 3 Measuring Unit 4 Supporting Device 5 Oscillator 6 Receiving Element 7 Supporting Rod 8 Connected Body 9 Frame 10 Measuring Unit Connected Body 11 Supporting Rod Connected Body 12 Measured Scroll 20 CPU 21 Oscillator 22 Sending Wave switching circuit 23 Wave receiving switching circuit 24 Geophone 25 Output display device

Claims (1)

[Scope of utility model registration request] 1. A rolled material tightness measuring apparatus using ultrasonic waves, comprising a measuring side device and a measurement control device, wherein the measuring side device comprises a plurality of sets of measuring units and a supporting device. The measuring unit is composed of an ultrasonic oscillator of the same shape and a vibrator that are fixed at regular intervals, and the supporting device is a supporting rod,
Consisting of a connecting body and a frame, the connecting body consisting of a measuring unit connecting body and a supporting rod connecting body, and a plurality of sets of measuring units on a long supporting rod, so that the direction of each measuring unit is perpendicular to the supporting rod, The support rods are attached at substantially equal intervals so as to be capable of swinging and cushioning, respectively, through a measuring unit connecting body, and the supporting rods are provided through the supporting rod connecting body in the axial direction of the winding to be measured and in a direction perpendicular to the axial direction. And vertically movably mounted on the frame, the measurement controller is CP
U, an oscillator, a transmission switching circuit, a reception switching circuit, a geophone and an output display device, and each measurement unit is connected to the transmission switching circuit and the reception switching circuit of the measurement controller, respectively.
An apparatus for measuring the tightness of a wound material, characterized in that the CPU controls all of ultrasonic wave oscillation, vibration reception, transmission / reception switching, measurement, measurement aggregation and output display of each measurement unit.