JPH0972731A - Film slack amount measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to measure the slack amounts in lateral and lengthwise directions in the entire length by providing a support roller for supporting a raw fabric roll, a winding roller and a plurality of guide rollers, and providing an article detecting sensor at the position opposed to the surface of the film of the state on the way of winding. SOLUTION: A film F is drawn from a raw fabric roll R supported by a support roller 8, brought into contact with a long size gage 14 and a tension measuring instrument 15, placed on guide rollers 9, 10, 11, and the drawing end of the film F is wound on a winding roller 12. An ultrasonic wave is emitted from an ultrasonic sensor 13 toward the surface of the film F of the lower side in the state that a predetermined tension is applied to the film F, and received to detect the interval between the sensor 13 and the film F. The sensor 13 is moved along the lateral direction of the film F by the rotation of a threaded shaft 18, and the sensor 13 again measures the slack of the film F at the moved position. After the lateral slack is measured, the film F is wound, and the different part is disposed at the lower side of the sensor 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film sag amount measuring device used for measuring the amount of sag in the width and length directions of a film such as an insulating film which is required when manufacturing a capacitor element.

[0002]

2. Description of the Related Art Regarding a film used for manufacturing a capacitor element, the amount of slack of the film is measured before the capacitor element is actually manufactured by using this film. As a film sag amount measuring device (hereinafter, referred to as a measuring device) used at this time, there is one having a configuration as shown in FIGS. 4 and 5. That is, F in these figures indicates a film, and R indicates its original roll, and the measuring device in this case is a pedestal 1, a supporting roller 2 for supporting the original roll R, a pair of guide rollers 3 ,. 4, a scale (scale plate) 5, and a weight (weight) 6 are provided.

The supporting roller 2 here is arranged at a position lower than the guide rollers 3 and 4 on one end side of the gantry 1, and the supporting roller 2 rotatably and stopably supports the original roll R. There is. In addition, the guide rollers 3, 4
Are arranged at positions separated from each other on the gantry 1, and the film F drawn from the original roll R is placed on the guide rollers 3 and 4 in a horizontal state. . Further, a weight 6 is arranged on the other end side of the gantry 1 facing the support roller 2 via the guide rollers 3 and 4, and the weight 6 is attached to the pull-out end of the film F. There is. In addition,
The scale 5 has dimensional scales set in the vertical direction, and is to be used by standing between the guide rollers 3 and 4.

In this measuring device, the amount of slack is measured according to the following procedure. First, the rotations of the support roller 2 and the original roll R are stopped, and the guide rollers 3 and 4 are pulled out from the original roll R.
The weight 6 is attached to the pull-out end of the film F placed on the top.
Attach. Then, the drawn-out end portion of the film F hangs down due to the weight of the weight 6, and the film F to which the weight of the weight 6 is applied as tension is stretched between the guide rollers 3 and 4. Therefore, the operator visually measures the height from the upper surface of the gantry 1 to the stretched film F while using the scale 5, and
When the obtained measurement data are compared and examined, the amount of slack in each part of the film F, that is, the slack state of the film F is obtained.

[0005]

By the way, in the measuring device having the conventional structure, the weight 6 is attached to the pull-out end portion of the film F to apply the tension to the film F, so that the slack amount can be measured in a range. It will be limited to the part where the film F is pulled out.
It was not possible to measure the amount of sagging over the entire length in the longitudinal direction. When it is necessary to measure the amount of slack in the entire length of the film F, it is necessary to repeatedly attach and detach the weight 6 to and from the film F, which is troublesome.

Further, in this measuring device, only the amount of slack in the width direction of the film F can be measured, and the amount of slack in the width direction middle portion cannot be measured.
In short, the measuring device according to the conventional example only measures the slack amount of a small part of the long film F wound as a roll, and in the conventional case, it is very small. The rough pass / fail judgment was made by analogy with the amount of slack for each part as a representative value showing the entire film F.

Although such a situation did not pose a particular problem when the demand for the film F as a raw material is not so high, the performance of products manufactured using the film F is improved. When the demand for the film F becomes strict as a cause, it has been demanded to perform measurement at a plurality of positions in the width direction of the film F and the entire length in the length direction. In addition, it has become necessary to meet the demand for automating the measurement of the amount of sagging of the film F, not by the operator's visual observation.

The present invention was devised to meet these demands, and an object thereof is to provide a measuring device capable of measuring the amount of sag in the width and length directions over the entire length of the film.

[0009]

In order to achieve the above-mentioned object, a measuring device according to the present invention is provided with a supporting roller which is arranged at one end side position of a gantry and supports an original roll of film
A winding roller for winding the film drawn from the original roll on the other end side of the frame, and a plurality of guide rollers for guiding the film being wound on the frame. In addition, it is characterized in that it is equipped with a non-contact type object detection sensor provided at a position facing the surface of the film in the process of being wound on the pedestal. . The object detection sensor at this time is preferably an ultrasonic sensor that moves along the width direction of the film.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing the structure of a measuring apparatus according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a line A- in FIG.
It is a sectional side view which shows the structure of the principal part cut | disconnected by the A line. Further, in these figures, F indicates a film and R indicates the original roll, and the measuring device in this case is the gantry 7
A support roller 8, a plurality of (three in FIG. 1) guide rollers 9, 10, 11, a winding roller 12, and an ultrasonic sensor 13 which is a non-contact type object detection sensor. It has been configured.

The supporting roller 8 here is provided with a powder brake and is arranged at a position lower than the guide rollers 9, 10, 11 on one end side (the left end side in FIG. 1) of the gantry 7, An original fabric roll R formed by winding a film F is rotatably and stopably supported by the support roller 8. The guide rollers 9, 10 and 11 are spaced apart from each other on the gantry 7 and are arranged at horizontal and juxtaposed positions to guide the film F being wound. On the guide rollers 9, 10 and 11, the film F pulled out from the original roll R is placed. A roller-type length gauge 14 that rotates in contact with the film F is provided on the guide roller 10 located in the middle, while the guide roller 10 and the guide roller 11 located closer to the pull-out side of the film F are provided. A tension measuring device 15 for measuring the tension applied to the film F is provided between and.

The take-up roller 12 for taking up the film F drawn from the original roll R is a frame facing the supporting roller 8 via guide rollers 9, 10, 11 arranged on the frame 7. 7 is arranged at a position lower than the guide rollers 9, 10, 11 on the other end side (the right end side in FIG. 1) of 7. At this time, the take-up roller 12 has a structure capable of adjusting the take-up force of the film F. As shown in FIG.
It is connected to the roller shaft via 7.

Further, the ultrasonic sensor 13 constituting this measuring device detects the distance from the surface of the film F stretched between the pair of guide rollers 9 and 10, and the ultrasonic sensor 13 , Guide roller 1 in intermediate position
0 and the guide roller 9 located on the side of the original roll R are positioned at a predetermined height by a screw shaft 18 and a guide rod 19 provided so as to straddle the film F on the frame 7. It is placed facing downward. A stepping motor 20 is directly connected to the screw shaft 18 here.
Ultrasonic sensor 13 along with the rotation of screw shaft 18
Moves along the width direction of the film F.

Next, a procedure for measuring the amount of sag of the film F using the measuring device having the above-mentioned structure will be described.
First, the film F is pulled out from the original roll R supported by the support roller 8, and the film F pulled out
Is placed on the guide rollers 9, 10, 11 while being in contact with the length gauge 14 and the tension measuring device 15, and the pull-out end of the film F is wound around the winding roller 12. Then, the rotation of the original roll R is stopped by braking the support roller 8 with the powder brake, and the winding roller 12 is rotated in the winding direction in this state.

Then, the support roller 8 and the take-up roller 12
The film F between them is pulled along the length direction, and the tension acting on the film F is measured by the tension measuring device 15. At this time, the braking force on the support roller 8 side is adjusted by the powder brake according to the value measured by the tension measuring device 15, and the rotation force of the winding roller 12 is adjusted by the powder clutch to form the film F. Make the tension to a certain level. In this way, the ultrasonic sensor 13 emits an ultrasonic wave toward the surface of the film F located under the film F under a constant tension applied to the film F, and receives the reflected wave of the ultrasonic wave sensor. The distance between 13 and the film F is detected. That is, the ultrasonic sensor 1
Since the height positions where 3 is arranged are constant, the amount of sag at each position of the film F is calculated based on the detected intervals.

When the amount of slack in the film F at a predetermined position is measured by the ultrasonic sensor 13, the ultrasonic sensor 13 is moved along with the width direction of the film F as the screw shaft 18 rotates. The ultrasonic sensor 13 again transmits and receives ultrasonic waves to and from the film F at the moved position, so that the amount of slack at the position is measured. In this way, when the amount of slack in each part in the width direction of the film F which is stretched between the guide rollers 9 and 10 and is still is measured, the support roller 8 is unbraked and wound. After the film F is wound on the take-up roller 12 side by a certain length by rotating the take-up roller 12, different portions in the length direction of the film F are positioned below the ultrasonic sensor 13. Further, a predetermined tension is applied to the film F by the same operation as described above, ultrasonic waves are transmitted / received to / from the film F by the ultrasonic sensor 13, and the above operation is repeated. As a result, the amount of slack in each portion along the width direction of each portion of the film F that differs in the length direction is measured.

By the way, in the present embodiment, the single ultrasonic sensor 13 is moved along the width direction of the film F to measure the amount of slack in each portion in the width direction of the film F. The ultrasonic sensors are used, and these ultrasonic sensors are arranged at different positions in the width direction of the film, and the amount of slack in each part in the width direction of the film is collectively measured by each ultrasonic sensor. It is also possible to measure. Furthermore, the ultrasonic sensor 13 may be arranged upward on the lower side of the film F. In addition, it is also possible to use a reflection type infrared sensor or the like instead of the ultrasonic sensor 13, and the sensor provided facing the surface of the film F has only to be a non-contact type object detection sensor. Of course.

[0019]

As described above, according to the measuring device of the present invention, it is possible to very easily measure the slack amount of each part in the width and length directions of the film wound as a roll. The effect that the pass / fail judgment of the film can be accurately made on the basis of the large amount of data thus obtained is obtained. Further, in the present invention,
Since the amount of slack is mechanically measured, there is an effect that it is easy to automate the whole.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of a measuring device according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a side sectional view showing a configuration of a main part taken along line AA in FIG.

FIG. 4 is a front view showing a configuration of a measuring device according to a conventional example.

FIG. 5 is a side view thereof.

[Explanation of symbols]

 F film R original roll 7 stand 8 support roller 9 guide roller 10 guide roller 11 guide roller 12 take-up roller 13 ultrasonic sensor (object detection sensor)

Claims (2)

[Claims] 1. A support roller which is disposed at one end side position of a gantry and supports an original roll of film, and a winding roller which is disposed at the other end side position of the gantry and which winds the film drawn from the original roll. It is provided with a take-up roller and a plurality of guide rollers arranged on the frame for guiding the film being wound, and is opposed to the surface of the film being wound on the frame. A film slack amount measuring device comprising a non-contact type object detection sensor provided at a position where 2. The film sag amount measuring device according to claim 1, wherein the object detection sensor is an ultrasonic sensor that moves along the width direction of the film.