JP2000024995A - Binding material cutting method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a time necessary for cutting and to improve the efficiency of the cutting work by detecting a position of a binding material by a detection sensor and executing the cutting operation in an area having the binding material. SOLUTION: An ultrasonic wave sensor 4 is mounted on a mount table 11 in such manner that it is located near a round blade 3. A bound coil 1 is placed on a specific position, then the mount table 11 is advanced by a cylinder 13 for advancing and backing, and the round blade 3 is moved to a position separated from a surface of the coil 1 by a fixed distance. Then a cutter elevation motor 18 is operated to move the cutter elevation table 15. In the upward movement, an ultrasonic wave sensor 4 radiates the ultrasonic wave at a specific angle, and receives its reflection sound. The ultrasonic wave sensor 4 itself moves upwardly, so that the projection of the ultrasonic wave is executed while upwardly scanning the sensor 4 to the surface of the coil 1. An ultrasonic wave detector 5 inputs the output of the ultrasonic wave sensor 4, detects the position of the binding material 2 on the basis of the signal of the ultrasonic wave sensor 4, and sends the same to a cut controller 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cutting a binding material wound to bind an object having a smooth surface property, for example, a coil.

[0002]

2. Description of the Related Art FIG. 6 is a schematic view of a conventional automatic cutting device for a binding material. In FIG. 6, a metal band-shaped binding material 2 is wound around a coil 1. The rotary round blade 3 for cutting the binding material 2 is rotated by the rotational driving force of the drive pulley 9 transmitted through the drive belt 10. The round blade 3 and the driving pulley 9 are mounted on a mounting base 11. The mounting base 11 is attached to the linear guide 12 so as to be movable (fore-and-aft movement), and the linear movement of the mounting base 11 allows the round blade 3 to be moved back and forth. The circular blade forward / backward moving cylinder 13 is for moving the mounting base 11 back and forth. In addition, the linear guide 12 is used for the cutting machine elevating table 1.
The cutting machine elevating table 15 is attached to a cutting machine elevating linear guide 16 so as to be vertically movable.

A rack gear 17 for raising and lowering the cutter is provided along the side surface of the lift 15 for the cutter and in the vicinity thereof. The cutting machine elevating base 15 is provided with a cutting machine elevating drive motor 18 and a cutting machine elevating pinion gear 19, and the cutting machine elevating pinion gear 19 and the cutting machine elevating rack gear 17 are engaged with each other. The cutting machine elevating rack 15 is rotated by the cutting machine elevating drive motor 18 so that the cutting machine elevating table 15 moves up and down. The drive pulley 9, the cylinder for forward and backward movement of the round blade 13 and the drive motor 18 for lifting and lowering the cutter are respectively controlled by the cutter controller 6.

[0004] In such a conventional automatic cutting device for a binding material, the cutting operation of the cutting device is started after the coil 1 bound by the binding material is arranged at a predetermined position. Since the position of the binding material 2 of the coil 1 differs for each coil and is not constant, the round blade 3 stands by at the initial position where the binding material 2 does not exist. The round blade 3 starts rotating according to a command from the cutting machine control device 6, and the forward / backward moving cylinder 13 is operated to advance (push out) the round blade mounting base 11 to a position where the binding material 2 can be cut. Hold position. Subsequently, the cutting machine elevating motor 18 is controlled by a command from the cutting machine control device 6.
Is operated to raise (fall) the cutting machine lift 15 at a predetermined speed at the time of cutting. Even after cutting the binding material 2 while rotating (up and down) with the cutting machine elevating table 15 in a rotating state, the round blade 3 continues the cutting operation to a predetermined position where the binding material 2 does not exist. Thereafter, the forward / backward moving cylinder 13 is retracted by a command from the cutting machine control device 6, and the cutting machine elevator 15 descends to reach the initial position. After that, the rotation of the round blade 3 is stopped to perform a series of cutting operations. finish.

[0005]

Since the conventional automatic severing device for a binding material is constructed as described above, the binding material 2
If the position is uneven, there is a possibility that the cutting operation may end without cutting the binding material 2 completely. Therefore, it is necessary to avoid such a situation. For this reason, the range in which the round blade 3 moves has to be made larger than necessary, and the time required for cutting is extra, which reduces the work efficiency. Also, in order to make the cutting width larger than necessary, the round blade 3
However, this results in wear in a short period of time, and the frequency of replacing the round blades 3 increases, so that a large purchase cost of the round blades is required.

Also, depending on the coil 1, the binding material 2 may be extremely
Is shifted from the center, and in this case, since the round blade 3 does not cut to that position, a situation has occurred in which the binding material 2 cannot be cut. In addition, even when the wear of the round blade 3 progresses greatly, a case may occur in which the binding material 2 cannot be completely cut. Therefore, a person who monitors for the occurrence of such an abnormality is required, and automation of the cutting of the binding material 2 is required. It was an obstacle in planning.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for cutting a binding material, which can improve the cutting efficiency and reduce the cutting operation cost. Another object of the present invention is to
In addition to the above, an object of the present invention is to provide a method and an apparatus for cutting a binding material, which can detect a cutting state of the binding material.

[0008]

(1) A method for cutting a binding material according to the present invention is a method for cutting a binding material wound to bind an object having a smooth surface property. Is detected by the detection sensor, and a cutting operation is performed in a region where the binding material exists. (2) The method for cutting a binding material according to the present invention is the cutting method according to the above (1), wherein an ultrasonic sensor is used as a detection sensor, and ultrasonic waves are projected while scanning the ultrasonic sensor.
The position of the binding material is detected based on the intensity of the reflected sound. (3) The method of cutting a binding material according to the present invention is the method of (1) or (2), wherein after performing the cutting operation,
Again, the binding material is detected by the detection sensor, and the quality of the cut is detected based on the output of the detection sensor.

(4) The apparatus for cutting a binding material according to the present invention comprises:
In a device for cutting a wrapping material wound to bind an object having a smooth surface property, a cutting blade for cutting the tying material, a driving mechanism for moving the cutting blade, and a relative position of the cutting blade are always constant. A detection sensor for detecting the binding material, a detection device for processing a signal from the detection sensor to detect the position of the binding material, and a driving mechanism and cutting based on the detection signal of the detection device. By controlling the drive of the blade,
A drive control device for causing the cutting blade to cut the binding material. (5) The binding material cutting device according to the present invention is the cutting device according to (4) above, wherein the detection sensor comprises an ultrasonic sensor, and the ultrasonic sensor projects ultrasonic waves while scanning.
The detection device detects the position of the binding material based on the intensity of the reflected sound from the ultrasonic sensor. (6) In the cutting device for a binding material according to the present invention, in the cutting device according to the above (4) or (5), the drive control device moves the detection sensor after performing the cutting operation to detect the binding material. The detection device detects the quality of the cutting based on the output of the detection sensor.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an outline of an apparatus for cutting a metal binding material according to an embodiment of the present invention. FIG.
, A metal band-shaped binding material 2 is wound around a coil 1. Rotary round blade 3 for cutting binding material 2
Is rotated by transmitting the rotational driving force of the driving pulley 9 via the driving belt 10. The round blade 3 and the driving pulley 9 are mounted on a mounting base 11. The mounting base 11 is attached to the linear guide 12 so as to be movable (fore-and-aft movement), and the linear movement of the mounting base 11 allows the round blade 3 to be moved back and forth. Circular blade forward / backward moving cylinder 13
Is for moving the mount 11 back and forth along the linear guide 12. Further, the linear guide 12 is attached to a cutting machine elevating platform 15, and the cutting machine elevating platform 15 is attached to a cutting machine elevating linear guide 16 so as to be vertically movable.

A cutting machine elevating rack gear 17 is provided along the side surface of the cutting machine elevating table 15 and in the vicinity thereof. The cutting machine elevating base 15 is provided with a cutting machine elevating drive motor 18 and a cutting machine elevating pinion gear 19, and the cutting machine elevating pinion gear 19 and the cutting machine elevating rack gear 17 are engaged with each other. The cutting machine elevating pinion gear 19 is rotationally driven by the cutting machine elevating drive motor 18, whereby the cutting machine elevating table 15 moves up and down, whereby the round blade 3 moves up and down. .

In the present embodiment, in addition to the above, the mounting table 1 is mounted so that the ultrasonic sensor 4 is located near the round blade 3.
1, and the output of the ultrasonic sensor 4 is input to the ultrasonic detector 5. The ultrasonic detector 5 processes the ultrasonic signal from the ultrasonic sensor 4 to detect the binding material 2 and outputs the detection result to the cutter control device 6. The cutting machine control device 6 controls the driving pulley 9, the round blade forward / backward moving cylinder 13 and the cutting machine elevating driving motor 18 based on the input signal.

FIG. 2 shows a binding material 2 wound on the outer periphery of a coil 1.
FIG. 7 is an operation explanatory diagram when detecting and disconnecting. The operation of the cutting device of FIG. 1 will be described with reference to FIG.

After arranging the bound coil 1 at a predetermined position, the cutting operation of the cutting machine is started. Since the position of the binding material 2 of the coil 1 differs for each coil and is not constant, the round blade 3 waits at the initial position a on the lower end side of the coil 1 where no binding material 2 exists. The forward / backward moving cylinder 13 is operated by a command from the cutting machine control device 6 to move the mounting table 11 forward, thereby moving the round blade 3 to a position b which is a predetermined distance away from the surface of the coil 1.

Thereafter, the cutting machine elevating motor 18 operates to raise the cutting machine elevating table 15. During the ascending process, the ultrasonic sensor 4 projects an ultrasonic wave at a predetermined angle and receives the reflected sound. Since the ultrasonic sensor 4 itself rises, the projection of the ultrasonic wave is performed while scanning the surface of the coil 1 upward. The ultrasonic detector 5 receives the output of the ultrasonic sensor 4 and detects the position of the binding material 2 based on the signal (the details of this detection will be described later). The ultrasonic detector 5 sends the detection signal to the cutter control device 6. Upon receiving the detection signal, the cutting machine control device 6 stops the cutting machine elevating motor 18 to stop the ascent and also drives the driving pulley 9 to rotate the round blade 3. At the same time, the forward / backward moving cylinder 13 is operated to advance the round blade mount 11 to a position where the binding material 2 can be cut (pushed out), and the round blade 3 is advanced to the position of the coil surface c to hold the position. I do.

Subsequently, the cutting machine elevating motor 18 is rotated, and with the round blade 3 rotated, the cutting machine elevates with the cutting machine elevating table 15 by a predetermined distance. Cut 2 The rising amount at this time includes the width of the binding material and the variation and the margin of the detection position. Only during this time, the cutting device moves at a predetermined low cutting speed. Thereafter, the round blade 3 is moved backward to the position e by driving the forward / backward movement cylinder 13 in accordance with a command from the cutting machine control device 6, and the rotation of the round blade 3 is stopped. Also descend at high speed. Also at the time of the lowering, the ultrasonic detector 5 detects the binding material 2 and, when detecting the binding material 2 again, sounds an abnormal alarm and stops, or the cutting of the binding material 2 is repeated again. I do. As described above, a series of cutting operations ends.

Next, details of the use of the ultrasonic sensor 4 as a sensor for detecting the binding material 2 and details of its operation will be described.

First, the circumstances in which the ultrasonic sensor 4 is employed will be described. As a sensor for detecting the binding material wound around the coil, for example, a distance sensor may be used. Since the distance to the surface of the coil and the distance to the surface of the binding material are different from each other, an attempt is made to distinguish the binding material from the coil based on the difference in the measured distance. However,
In this method, the winding diameter may differ depending on the position even if the coil is the same due to the deviation of the coil surface when winding the steel sheet, so the distance to the coil surface is not always constant. Since a gap may be formed between the coil and the binding material depending on the mounting method, it is difficult to determine the distance to the binding material because it is not always constant.

A method using light as a detection method,
For example, it is conceivable to use a photoelectric sensor. However, in tests using this method, if the surface is wet with water or rust is attached, stable reflection is not obtained because the reflection situation is different, and the detection reliability is low as a sensor The result was. Similarly, as a method using an optical system, a method of performing image processing from an image of a coil and a binding material is conceivable, but in addition to the above-described variation in reflection characteristics, a sensor becomes expensive. There are drawbacks.

The ultrasonic sensor 4 is employed based on the results of various tests and examinations as described above. By using an ultrasonic wave as a sensor for detecting a binding material, all of the above-described ultrasonic sensors are used. Is solved, and the basis thereof will be described through the following operation description.

FIGS. 3A and 3B show the ultrasonic sensor 4 of FIG.
FIG. 4 is an explanatory diagram of the detection principle of FIG. As shown in FIG. 3A, when the binding material 2 is not provided, the surface of the coil 1 is smooth, so that most of the projected ultrasonic waves are specularly reflected on the surface of the coil 1 and the ultrasonic sensor 4 Will not return to the side. On the other hand, as shown in FIG. 3B, when there is the binding material 2,
When the ultrasonic wave is projected on the boundary between the coil 1 and the binding material 2, the ultrasonic wave is irregularly reflected at the edge of the binding material 2, and a part of the ultrasonic wave is reflected back to the ultrasonic sensor 4 side and returns. come. Therefore, the ultrasonic sensor 4 is installed so that the ultrasonic wave is projected onto the edge surface of the binding material 2 and the ultrasonic sensor 4 is, for example, a method perpendicular to the surface of the coil 1 so as not to receive the smooth reflection from the surface of the coil 1. By arranging obliquely avoiding the line, the binding material can be detected with high sensitivity. In addition, since the method using ultrasonic waves only needs to detect the presence or absence of ultrasonic waves, the detection sensitivity is better and the influence of disturbance is less than that of distance measurement. Furthermore, since the ultrasonic sensor 4 can be disposed at a relatively long distance by using ultrasonic waves, it is possible to avoid the risk of breakage of the sensor due to jumping out of the binding material when cutting the binding material.

FIG. 4 is a view showing the positional relationship between the ultrasonic sensor 4 and the round blade 3 when the binding material 2 is cut from the direction shown in FIG. 2 (from bottom to top). Here, since the reflected sound from the binding material 2 by the ultrasonic sensor 4 is only from the upper surface edge of the binding material 1, the detection position of the ultrasonic sensor 4 is such that the tip of the round blade 3 reaches the lower surface of the binding material 2. Need to detect before. Therefore, the ultrasonic sensor 4 needs to be installed above the round blade 3. At this time, the center position of the round blade 3 and the installation position of the ultrasonic sensor 4 are determined by, for example, the expression (1) when detecting the binding material. The relationship may be determined as shown in FIG. H = A + Ltan θ−S + β (1)

Here, H is the distance between the center of the round blade 3 and the ultrasonic sensor 4, A is the width of the binding material, and S is the measurement when the ultrasonic sensor 4 detects the upper edge of the binding material 1. L indicates the distance between the axis center and the upper surface edge, L indicates the distance between the ultrasonic sensor and the coil surface, θ indicates the projection angle of the ultrasonic sensor 4, and β indicates the amount of allowance including detection variations.

Equation (1) is a relation when the ultrasonic sensor 4 and the round blade 3 are on the same plane. However, even when the ultrasonic sensor 4 and the round blade 3 are not on the same plane, the arrangement can be determined in the same way. it can.

Further, the above description relates to the configuration in the case where the binding material 2 is cut while the round blade 3 is raised.
When cutting the binding material 2 while lowering the round blade 3, the ultrasonic sensor 4 in FIG. 4 may be installed at a position symmetrical to the round blade 3, that is, below the round blade 3. If it is difficult to install on the lower side due to the configuration of the apparatus, the center position of the round blade 3 and the installation position of the ultrasonic sensor 4 are set as shown in FIG. May be determined so as to satisfy the relationship shown in Expression (2).

H = Ltan θ + S−β (2)

Here, H is the center of the round blade 3 and the ultrasonic sensor 4
S is the distance between the center of the measurement axis and the upper edge when the ultrasonic sensor 4 detects the upper edge of the binding material 2, L is the distance between the ultrasonic sensor 4 and the surface of the coil 1, and θ is The projection angle β of the ultrasonic sensor 4 indicates a margin including a variation in detection.

In the above embodiment, when the ultrasonic sensor 4 detects the edge of the binding material 2,
The relative position between the ultrasonic sensor 4 and the round blade 3 is determined so that the position of the round blade 3 (the position in the vertical direction) corresponds to the edge of the binding material 2. If not, do the following: That is, the cutting machine control device 6 receives the detection signal from the ultrasonic detector 5 and also receives the signal from the encoder 20 that rotates with the rotation of the cutting machine elevating pinion gear 19, and outputs the signal of the round blade 3. When the position (the position in the vertical direction) becomes a position corresponding to the edge of the binding material 2, the cutting operation is performed.

Further, in the above-described embodiment, an example of the apparatus for cutting the binding material of the coil has been described. However, the object of the present invention is not limited to this, and the binding material having a smooth surface property is used. Any binding material other than the coil is also applicable. Further, the binding material is not limited to a band-like material made of steel plate, but may have a complicated shape such as a wire rope. Further, the round blade of the cutting device may not be the round blade shown in the above embodiment. Furthermore, the movement of the cutting device is not limited to front and rear, up and down, and may be determined according to the shape of the object.

[0030]

According to the present invention, the following effects can be obtained. (1) Since it is less necessary to cut an unnecessary portion for cutting after detecting the position of the binding material, the time required for cutting can be shortened, and the efficiency of the cutting operation is improved. (2) Since cutting to an unnecessary portion for cutting the binding material is reduced, wear of the cutting tool (for example, a round blade) is reduced, and the cost of replacing the cutting tool can be reduced. (3) Since a cutting abnormality of the binding material can be detected,
It is not necessary for a person to constantly monitor the occurrence of an abnormality, and the work load can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an apparatus for cutting a binding material according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the binding material cutting device of FIG. 1;

FIG. 3 is an explanatory diagram of a binding material detection principle using the ultrasonic sensor of FIG. 1;

FIG. 4 is a view showing a positional relationship between an ultrasonic sensor and a round blade of the binding material cutting device of FIG. 1;

FIG. 5 is a diagram showing another positional relationship between the ultrasonic sensor and the round blade.

FIG. 6 is a schematic configuration diagram of a conventional automatic cutting device for a binding material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coil 2 Binding material 3 Round blade 4 Ultrasonic sensor 5 Ultrasonic detector 6 Cutting machine control device 9 Drive pulley 10 Belt 11 Round blade mount 12 Linear guide for moving round blade 13 Cylinder for forward and backward movement of round blade mount 15 Cutting Machine lifting table 16 Cutting machine lifting linear guide 17 Fixed rack gear 18 Cutting machine lifting motor 19 Cutting machine lifting pinion gear 20 Encoder

Claims (6)

[Claims] In a method of cutting a binding material wound to bind an object having a smooth surface property, a position of the binding material is detected by a detection sensor, and a cutting operation is performed in an area where the binding material exists. A method for cutting a binding material, which is performed. 2. An ultrasonic sensor is used as the detection sensor, and ultrasonic waves are projected while scanning the ultrasonic sensor.
2. The method according to claim 1, wherein the position of the binding material is detected based on the intensity of the reflected sound. 3. The cutting device according to claim 1, wherein after the cutting operation is performed, the binding material is detected again by the detection sensor, and the quality of the cutting is detected based on the output of the detection sensor. How to cut the binding material. 4. An apparatus for cutting a binding material wound to bind an object having a smooth surface property, a cutting blade for cutting the binding material, a driving mechanism for moving the cutting blade, and the cutting blade. A detection sensor for detecting the binding material, a detection device for processing a signal from the detection sensor to detect the position of the binding material, and a detection device for detecting the binding material. An apparatus for cutting a binding material, comprising: a drive control device that controls driving of the driving mechanism and the cutting blade based on a detection signal to cause the cutting blade to cut the binding material. 5. The detection sensor comprises an ultrasonic sensor, the ultrasonic sensor emits an ultrasonic wave while scanning, and the detection device determines the position of the binding material by the intensity of the sound reflected from the ultrasonic sensor. The apparatus for cutting a binding material according to claim 4, wherein the detection is performed. 6. The drive control device, after performing a cutting operation, performs detection of a binding material while moving the detection sensor, and the detection device detects the quality of the cut based on an output of the detection sensor. The apparatus for cutting a binding material according to claim 4 or 5, wherein