JPH0347686B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for measuring the thickness of a flowing object to be measured, such as a plastic sheet or film, which measures the thickness of the object while flowing the object. be.

Conventional Structures and Problems Conventionally, there are contact and non-contact methods for measuring objects to be measured, such as plastic sheets and films, while flowing (moving) them, each with its own characteristics. Among these, the contact type is characterized by being inexpensive and not easily affected by the physical properties of the object to be measured. The measuring method involves sandwiching the lower and upper surfaces of a flowing object between a pair of rollers, and electrically or mechanically measuring and displaying the distance between these rollers. However, since the roller is in direct contact with the object to be measured, there is a problem in that the object to be measured will be damaged if the roller is moved laterally. Therefore, the contact type cannot measure the thickness of the object to be measured in the width direction. On the other hand, in the case of a non-contact method that uses radiation or β-rays, it is also possible to measure the thickness in the width direction, but in this case, since there is no pinching, a complicated control configuration is required to deal with waving of the measured object. Because they are necessary, they are expensive, and many have harmful effects on the human body due to radiation. Therefore, the commonly used method for thickness measurement is to take out a portion of the sample and measure it with a micrometer or the like. However, this method has the disadvantage that it stops the flow of the object to be measured, cannot be measured all the time, and also does not contribute to labor savings because it requires manual labor.

OBJECT OF THE INVENTION An object of the present invention is to provide a thickness measuring device for a flowing workpiece that can continuously measure the thickness of the workpiece in the flow direction and width direction without damaging the workpiece. It is in the point of doing.

Structure of the Invention In order to achieve the above object, the device for measuring the thickness of a flowing workpiece according to the present invention moves a movable frame to a guide rail placed along the axis of a guide roller that guides the workpiece. A traversing device is provided for freely guiding the movable frame and moving the movable frame along the guide rail, and the movable frame is provided with a horizontal axis parallel to the axis of the guide roller, and a rocking body is attached to the horizontal axis. A measurement roller supported swingably in a plane orthogonal to the axis thereof and capable of contacting the object to be measured guided by a guide roller on this oscillator, and a non-contact measurement sensor that measures the thickness of the object to be measured. and an actuating device for swinging the swinging body toward and away from the surface of the guide roller.

According to this configuration, by bringing the measurement roller close to the guide roller and sandwiching the object to be measured, thickness measurement in the machine direction can be performed using a non-contact measurement sensor without causing any undulating phenomenon on the object to be measured. Moreover, the thickness measurement in the width direction can be performed without damaging the object to be measured by moving the measuring roller and the measuring sensor apart via the oscillator using the actuating device and then moving the movable frame in the width direction. Ru.

Embodiment and Operation An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 denotes a main body frame, which is composed of a pair of left and right side plates 2, a plurality of channel members 3 disposed between these side plates 2, and the like. A guide roller 5 is disposed at a lower portion between the side plates 2 via a roller shaft 4, and this guide roller 5 is rotatable around a guide roller axis 5A. A support plate 6 is provided between the center portions of the side plates 2, and a guide rail 7 is attached to this support plate 6. 8 is a movable frame that is supported and guided by the guide rail 7 via the guided body 9, and is arranged opposite to the guide roller 5 so that the guide roller axis 5
It can freely move back and forth along A. Reference numeral 10 denotes a cross-feeding device for reciprocating the movable frame 8, which includes a plurality of guide wheels 11 attached to both side plates 2 and one side plate 2.
A driving wheel body 12 attached to the wheel body 12, a rotating body 13 suspended between the wheel bodies 11 and 12, a rotary actuator 15 interlocked with the driving wheel body 12 via a clutch 14, and a cylinder for clutch switching. 16, and the rotating body 13 is fixed to the movable frame 8. A measuring roller 17 that can move toward and away from the guide roller 5 is attached to the movable frame 8 . That is, in the movable frame 8, a horizontal axis 18 parallel to the guide roller axis 5A is connected to a bracket 19.
The measuring roller 17 is attached to the tip of a vertically oscillating body 20 attached to the horizontal shaft 18 via a horizontal roller shaft 21 . 22 indicates a balance weight. 23 swings the swinging body 20 relative to the guide roller 5 to move the measurement roller 17 to the guide roller 5.
a square shaft 24 which is arranged along the guide roller axis 5A and is rotatably supported by both side plates 2;
A rotary actuator 25 that interlocks with this square shaft 24, an eccentric cam 26 that is externally fitted onto the square shaft 24 so that it can freely slide only in the longitudinal direction, and this eccentric cam 2.
6, and a pin 29 that connects the elevator plate 28 and the intermediate portion of the rocking body 20 such that they can swing relative to each other. A non-contact measurement sensor 30 is disposed at a position close to the measurement roller 15, and this measurement sensor 30
is attached to the rocking body 20 via the connecting member 31. The measurement sensor 30 is, for example, an eddy current type gap sensor that senses the magnitude of an eddy current generated on the other side (in this embodiment, the guide roller 5) when a high frequency voltage is applied.
The fact that the magnitude of the current changes with distance is electrically extracted and converted into thickness using a converter (amplifier). A pointer 32 is provided on the movable frame 8, and a display 33 indicating the position in the width direction is attached to one of the channel machines 3 so as to correspond to the pointer 32. In order to detect the changed position in the width direction on the movable frame 8 side, a detection sensor 34 and an amplifier 35 are provided on the upper part of the movable frame 8, and a plurality of detected parts 42 are provided on the frame main body 1 side. These detected parts 42 are made up of a plurality of mounting holes 36 and a detected body 37 that can be attached to and detached from these mounting holes 36,
By changing the combination of the number of mounted detection objects 37 and the mounting positions, the detected positions are set in stages.
The forward and reverse rotation of the square shaft 24 causes a striker 38 attached to the square shaft 24 to be connected to each proximity switch 3.
This is done by detecting at 9 and 40. 41
indicates a cable carrier. Reference numeral 43 indicates an object to be measured made of, for example, a plastic sheet or film.

Next, the operation of the above embodiment will be explained. 1st
In FIG. 2, the measuring roller 17 is lowered.
The object to be measured 43 is sandwiched between the rollers 17 and the guide rollers 5, and the thickness of the object to be measured 43 can be measured by measuring the distance between the surfaces of both rollers 17 and 5 with the measurement sensor 30. With this, Guideline 3
At [16 points] indicated by 2, the thickness of the flowing object 43 in the flow direction can be continuously measured. If you want to measure the thickness at another point,
First, the rotary actuator 25 rotates the square shaft 2.
Rotate 4 180 degrees. Then, due to the relationship between the eccentric cam 26 and the external fitting part 27, the elevating plate 28 rises in accordance with the amount of eccentricity, and the oscillating body 20 is oscillated upward around the horizontal axis 18 via the pin 29 to move the object to be measured. The measuring roller 17 is separated from the object 43, and the measuring sensor 30 is also separated. Next, clutch 1
4 is closed, and the rotary actuator 15 is rotated in one direction by a predetermined amount. The amount of rotation is transmitted to the movable frame 8 via the rotating body 13, and the movable frame 8 is moved to one side by one point (fixed pitch). When moving multiple points, open the clutch 14 and rotate the rotary actuator 15 in the other direction (return rotation).
Then, close the clutch 14 and rotate it to one side,
By repeating this, you can move the number of times. Note that by reversing the timing of opening and closing of the clutch 14, movement in the opposite direction can be achieved.
After moving to a predetermined point, the measuring roller 17 is lowered by the reverse operation to the above, and the object to be measured 43 is sandwiched between it and the guide roller 5, so that the thickness measurement at the point can be continuously performed. Ru. This allows continuous measurements in the width direction.

The cross-feeding by the cross-feeding device 10 may be made stepless and can be stopped at any position, but when the feed by the cross-feeding device 10 is configured to be fixed pitch feed as in the above embodiment, the width direction Since the measurement point is determined, it can be easily taken out as data for controlling the thickness of the object to be measured 43.

Effects of the Invention As described above, according to the configuration of the present invention, the measurement roller is brought into contact with the object to be measured, and the distance between the guide roller surface and the measurement roller is measured using a non-contact measurement sensor, that is, the distance of the object to be measured. Since the thickness is measured, the following effects are achieved.

The thickness of the object to be measured is measured using a non-contact sensor via a measuring roller that comes into contact with the object. Because it does not require a complicated control mechanism to deal with rippling, etc., it is extremely inexpensive.

Since the thickness is measured via a measuring roller that comes into contact with the object to be measured, accurate measurement can be performed regardless of the physical properties of the object to be measured, and therefore it can be applied to a wide range of measurements.

By moving the movable frame with the measuring roller separated, the measuring sensor can be moved in the width direction, and then by bringing the measuring roller into contact with it, the thickness can be measured in the width direction. This combined with the fact that there is no damage caused by the measuring roller makes it possible to constantly control quality without stopping the flow.

It can be easily installed into existing equipment.

Since only one measuring roller is used, the thickness at the measuring point is more accurate.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2 is a longitudinal side view, Fig. 3 is a plan view, and Fig. 4 is a partially cutaway side view of the main part. , FIG. 5 is a partially cutaway plan view of the same. DESCRIPTION OF SYMBOLS 1... Frame body, 5... Guide roller, 5A... Guide roller axis, 7... Guide rail, 8... Movable frame, 9
...Guided body, 10...Transverse feed device, 13... Rotating body, 15... Rotary actuator, 17... Measuring roller, 20... Oscillating body, 23... Actuating device, 24
...Square shaft, 25...Rotary actuator, 28
... Lifting plate, 30... Measurement sensor, 32... Pointer, 3
3...Display object, 43...Measurement object.

Claims (1)

[Claims] 1. A guide rail disposed along the axis of a guide roller that guides the object to be measured is provided with a lateral feed device that movably guides the movable frame and moves the movable frame along the guide rail, The movable frame is provided with a horizontal axis parallel to the guide roller axis, and a swinging body is supported on the horizontal shaft so as to be swingable in a plane orthogonal to the axis, and the swinging body is guided to the guide roller. a measuring roller that can come into contact with an object to be measured and a non-contact measurement sensor that measures the thickness of the object to be measured; and an operation of swinging the rocking body in a direction toward and away from the surface of the guide roller. A thickness measuring device for a flowing object to be measured, characterized in that the device is provided with the device.