JPS6156080B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable to long articles such as long rubber products such as rubber belts and rubber hoses, wood, woven paper,
The present invention relates to an apparatus for quickly and accurately measuring and processing the length of plastic sheets, metal products such as steel bars and strips, etc.

It is often necessary in industry to process (e.g. cut, perforate, groove, weld, scribe, etc.) the various long products mentioned above at fixed lengths, but the positioning and processing can be done quickly and accurately. It is very difficult to do so. In particular, for length measurement work, which is the basis of positioning, it is not impossible to measure in microns by using a block gauge or the like for small items, or by using a length measuring machine for larger items. In recent years, measuring instruments that make full use of optoelectronics have been developed, but it is not possible to bring these to the field and use them to continuously measure the length of long objects due to the cost and labor involved. Less is.

Therefore, the present applicant has previously developed a method and apparatus for sizing a long article, which is suitable for on-site use and is simpler and capable of efficient length measurement and processing. The details are disclosed in Japanese Patent Application Laid-open No. 125609/1983, but to briefly explain it, while moving the workpiece along a leveling rod of a certain length, the length of the leveling rod is measured from the front end of the workpiece. In this method, the desired length is obtained by repeating the operation of marking the workpiece each time, and finally accurately measuring the remaining length that is less than the length of the leveling rod. The applicant's company is currently using the equipment developed to carry out this method in its production activities. Even if the unit length measurement is repeated several times, the cumulative error is at most ±0.1 mm or less, and even if you add errors caused by vibrations of processing tools, the total error is at most ±0.2 mm. Extremely accurate length measurement and processing is possible.

By the way, in addition to the above-mentioned precise machining accuracy, important requirements required at manufacturing sites include shortening machining time, that is, increasing efficiency. As a result of the inventors' studies on the previously invented device with the aim of further improving this problem, we found that as long as the length of the workpiece is below a certain value, the length of the staff, that is, the sensor position. Even if the distance from It has been found that increasing the length significantly reduces the time required to complete the process.

The present invention focuses on the above-mentioned facts, and provides a means for measuring a long workpiece more quickly and with high precision, and furthermore, for processing the workpiece while minimizing errors. The point is that the unit length of the leveling rod used to measure the object can be varied depending on the length of the object being processed.

The device of the present invention basically includes a device for moving a workpiece along one plane, a sensor for detecting the front end of the workpiece and a mark made on the workpiece, and a sensor for detecting the front end of the workpiece and a mark made on the workpiece. one or more markers installed at an appropriate distance from the sensor depending on the machining length; a device that integrates with the sensor to total the number of marks made on the workpiece; and the sensor position. or a processing device provided at the marker position. In this configuration, the sensor and the marker constitute the above-mentioned "leveling rod," and the "unit length of the leveling rod" is set by the installation interval of both members.

According to the present invention, one method of making the unit length of the leveling rod variable according to the machining length of the workpiece is to use a first marker installed at a certain distance from the sensor, and a first marker installed at a certain distance from the sensor. This is a method in which a plurality of markers are provided, each consisting of a first marker and a second marker installed longer than the first marker, and both are selectively operated depending on the processing length of the workpiece. The number of markers can be further increased if necessary.

Another method for making the unit length of the leveling rod variable is to provide one marker and move the marker in the front and rear directions depending on the machining length of the workpiece, and set the unit of the leveling rod that is appropriate for the machining length. This is a method to set the length. In this case, the marker is moved by an auxiliary drive device such as a servo motor on a track laid along the direction of movement of the workpiece.

According to the apparatus of the present invention, when the sensor detects the front end of the workpiece being moved in one direction by the moving device or the first mark placed on the workpiece, the sensor moves the front end of the workpiece to be moved in one direction by the sensor, Markers placed at separate rear positions simultaneously mark the workpiece. In addition, a totalizing device linked to the sensor counts the number of marks,
And add up. These mark detection, mark number accumulation, and marking operations are performed using the value obtained by multiplying the accumulated number of marks (n) by the staff length (l) for the planned machining length (L) of the workpiece. The measured length of the workpiece is (n
+1)・l≧L is repeated until the relationship is satisfied.
If the above relational expression is (nl) = L, then the necessary processing such as cutting can be performed at the final mark position, but if (n+1)・l>L, the remaining length (△l) is When it is shorter than the staff length (l), it is necessary to accurately measure the Δl and make a final mark at the end position.

The device of the present invention includes a sizing movement mechanism that moves the marker forward by a distance corresponding to Δl in order to measure the remaining length (Δl) that is less than the above staff length (l). When using a plurality of markers having different distances from the sensor as described above, this sizing movement mechanism is attached to the marker with the shortest distance from the sensor, that is, the unit length of the leveling rod. In the case of this model marker, if the machining length (L) of the workpiece
However, when the marker length (l) is much longer than the relatively long staff length (l) of a marker, the marker is operated first to perform marking. Next, when the remaining length (△l) obtained by subtracting the length measured by the marker (nl) from the planned length (L) of the workpiece is less than the staff length (l) of the marker, use a relatively short staff length. Another marker having the holder and the sizing movement mechanism is operated to accurately measure and mark the remaining length (Δl).

On the other hand, in the case of a model equipped with only one marker, which allows the marker installation position to be changed appropriately according to the machining length of the workpiece, the previous sizing movement mechanism is attached to the marker. . It goes without saying that this sizing movement mechanism is moved together with the marker when the marker is moved from one installation position to another according to the machining length of the workpiece by an auxiliary drive device such as a servo motor.

As the sensor which plays an important role in the apparatus of the present invention, an element that senses physical force such as light, magnetism, radio waves, radiation, fluid pressure, etc. is arbitrarily used depending on the material, shape, etc. of the workpiece. For example, to detect the edge of a workpiece, optical sensors such as CDS diodes and phototubes and air pressure sensors are generally used, but precision limit switches and electromagnetic induction sensors are also used. On the other hand, various sensors are used to detect marks depending on the type of mark applied. A magnetic sensor such as a magnetic proximity switch is the simplest method when the mark is magnetic, and as a result of the mark being attached instantly,
This has the advantage of minimizing errors caused by inertia, etc. However, this magnetic detection method cannot be used directly for non-magnetic workpieces, so in that case, it may be necessary to use magnetic ink to mark the workpiece or insert ferromagnetic powder or wire into the workpiece. You need to embed it.

The marker is provided for the purpose of attaching arbitrary marks for counting and processing instructions to the workpiece, and is done using paint, ink, etc. in addition to the above-mentioned magnetism or magnetic ink.

It is preferable that the marking be done instantaneously so that the work can be done quickly and the length can be measured while constantly moving the workpiece and the sensor relative to each other as much as possible.

On the other hand, it is preferable that the mark width be narrow in order to minimize length measurement errors and processing tool operation errors.
However, at present there is no practical means that can completely satisfy these contradictory conditions. Therefore, in the apparatus of the present invention, the workpiece is temporarily stopped for each marking, albeit for as short a time as possible. Therefore, if the planned machining length of the workpiece is greater than a certain value, increase the marker length of the marker accordingly, or mark using a marker with a longer gauge length. This will improve work efficiency.

In the apparatus of the present invention, it is also possible to directly give the marker the role of a machining head. In this system, the machining head moves to the position to be processed, so that the operation of applying a machining instruction mark is unnecessary.

An example in which the apparatus of the present invention is used to cut a conductive belt fabric to a fixed size will be described below, but this is merely an example and is not intended to limit the scope of the inventive idea.

FIG. 1 is a plan view showing a schematic structure of a belt sizing cutting device according to an embodiment of the present invention. On the way, the device of this example moves a roller 2 for delivering the belt 5 provided in front of the pedestal 1 (to the right in the figure) and a roller 3 for taking up the belt 5 provided to the rear of the pedestal 1 (to the left in the figure). Further, on the upper surface of the pedestal 1, a cutter running base 8 is provided at a position close to the take-up roller 3 so as to straddle the belt so as to be diagonal to the belt movement direction. The belt feeding roller 2 forms a pair with another roller (not shown), and is arranged vertically in parallel with the plane of the pedestal 1 as a reference. Similarly to the delivery rollers 2, the take-up rollers 3 are also configured as a pair of two rollers.

A rotary blade type cutter 4 is mounted on the cutter carriage 8.
is mounted together with a drive motor 7, and this cutter reciprocates along the rail 6 on the stand 8 in a direction diagonally across the surface of the stand. Then, a first photo sensor 15 is placed on the intersection of the illustrated cutter travel line x and a mark travel line y that passes through the mark point p of the marker 13 described later and is parallel to the side edge of the pedestal 1.
is provided. Further, a second photo sensor 15a is provided at a position on the mark progression line y and behind the first photo sensor 15 (to the left in the figure), and this second photo sensor 15a
is belt 5, which was fed on the frame at the beginning of the work.
When the front end of the roller 2 is detected, a command to stop the feed roller 2 is sent.

An NC device 10 is provided along one side edge of the pedestal 1. The NC device 10 has bearings 1 at both ends.
It consists of a screw shaft 12 supported by screw shafts 1 and 11', and a movable first magnetic ink marker 13 fitted on this shaft.
Axis 1 is driven by a servo motor 14.
2 can be slid in the left and right directions in the figure. In the case of this example device, the marker 13 is always located 50 cm apart from the first photo sensor 15.

On the side edge of the gantry where the upper first marker 13 is provided, a second marker 13a is further provided closer to the feeding roller 2. This marker 13a is located 5 m apart from the first photo sensor 15.

The operation of cutting the belt to size using the apparatus of this example is performed as follows.

First, by operating the dial on the control panel 18, the user sets the predetermined length and number of belts to be cut into the electronic control circuit while checking the digital display board.

Next, the starting end of the belt 5 is wound around and pulled out from the mandrel 16, and this is passed through the feeding roller 2.
After inserting it between the two, start the device by pressing the start button.

The belt 5 advances in the direction of the take-up roller 3 along the width plate (not shown) of the pedestal 1, and when its starting end reaches the second photo sensor 15a, the feed-out roller 2 stops. belt 5
will also stop. Then, the cutter traveling base 8 descends to fix the belt 5, and at the same time the cutter 4 travels along the slit of the base 8 to cut the belt 5. At this time, if the planned processing length of the belt is 13 m or less, the first marker 13 is activated and a first mark is placed on the belt 5.

When the upper cutting is finished, the cutter carriage 8 rises, and at the same time the belt is pushed forward by the delivery roller 2, and its starting end eventually reaches the take-off roller 3. It is wound around a winding mandrel 17.
Thereafter, the belt 5 is moved under tension due to the speed difference between the two rollers, and is mainly pulled by the take-up roller 3.

The first mark attached is the first photo sensor 1
When detected by 5, rollers 2 and 3 stop,
The marker 13 makes a second mark. Thereafter, mark detection by the sensor 15 and marking by the marker 13 are repeated, but the number of marks is memorized by the electronic circuit in the control panel 18.
and the distance from the sensor 15 to the marker 13,
In other words, the value (nl) obtained by multiplying the staff length (l = 50 cm) by the number of marks (n) is compared with the planned machining length (L), and as a result, the remaining length (△l) is equal to the staff length (l). If it is determined that it is smaller, the NC servo motor 14 is activated, the first marker 13 is moved backward by a distance corresponding to the remaining length (Δl), and a final mark is placed at that position. When this final mark position reaches the position of the first photo sensor 15, the cutter 4 is activated to cut the belt.

In this example device, the previous belt processing length (L) is 13
m, after marking is first performed by the second marker 13a, if the remaining length (Δl) becomes equal to or less than the staff length of the marker (l = 5 m),
Subsequent markings are performed using the first marker 13.

FIG. 2 is a plan view of a belt sizing cutting device according to another embodiment of the present invention. The device of this example differs from the previous example in that, instead of using two types of markers in the previous example, one marker whose staff length (l) can be arbitrarily changed is used. That is, as shown in the figure, the device of this embodiment has a screw shaft 12 supported by bearings 11 and 11'.
and a movable magnetic ink marker 13 fitted on this shaft.
If the planned processing length of the belt is 13 m or more, this NC device 10 is placed at the position shown by the dotted line in the figure, that is, at a position where the marker 13 is 5 m apart from the first photo sensor 15. It is moved by the drive device 20. In addition, if the planned processing length is 13m or less, as shown by the solid line,
It is installed at a position 1 m apart from the first photo sensor 15. The marking operation of the marker and the cutting operation of the cutter in this example device are the same as in the previous example device.

As described in detail above, the present invention provides a sizing processing device that can accurately and efficiently process a long object into predetermined dimensions, and has great industrial value.

[Brief explanation of the drawing]

1 and 2 are plan views of an apparatus according to an embodiment of the invention. 1: Frame, 2: Feeding roller, 3: Taking-up roller, 4: Cutter, 5: Belt, 6:
Rail, 7:4 drive motor, 8: cutter running base, 9: take-up motor, 10: NC device, 11, 11': bearing, 12: screw shaft,
13: first marker, 13a: second marker, 1
4: NC servo motor, 15: 1st photo sensor, 15a: 2nd photo sensor, 16: Winding mandrel, 17: Winding mandrel, 1
8: Control panel, 19: Marker movement bed, 20:
Drive device.

Claims (1)

[Scope of Claims] 1. A device for moving a workpiece, a sensor for detecting the front end of the workpiece and a mark made on the workpiece, and a device for moving the workpiece according to the planned machining length of the workpiece. one or more markers whose installation distance from the sensor is variable; a device that integrates with the sensor to total the number of marks made by the marker; and processing provided at the sensor position or the marker position. sizing of a long object, characterized in that the marker is equipped with a sizing moving device that moves the marker by a distance corresponding to a fractional length of the processing length and the integrated planned length. Processing equipment. 2. The sizing processing device for a long object according to claim 1, comprising a plurality of markers having different long and short installation distances from the sensor. 3. An apparatus for sizing a long object according to claim 1, comprising one marker whose installation distance from the sensor can be changed by the sizing moving device according to the planned processing length of the workpiece. 4. The sizing processing device for long objects according to claim 1, wherein the marker also serves as a processing head.