JPH04121391A - Automatic transporting coil lifter for metal band coil - Google Patents

Abstract

PURPOSE:To surely support a metal band coil by a mortal coil lifter by using a phototube, which comprises a light projector and a light receiver to serve as the phototube with a detected distance of specific dimension, so as to accurately detect a metal band coil hole. CONSTITUTION:In a mortal coil lifter 1 formed by mounting almost L-shaped arms 4 in both sides of an arm holder 2, suspended to a crane, by opposing metal band coil hanging pawls 5, formed of a horizontal member, in bottom ends of the arms 4 in a condition that the pawls 5 can approach each other and separate from each other, phototubes 6, 6', comprising projectors 6a, 6a' and light receivers 6b, 6b' of 70 to 100m detection distance, are arranged respectively in upper and lower parts of the metal band coil hanging pawl 5 of the arm 4. Thus, a metal band coil hole can be accurately detected by light permeating laminated paper even when the metal band coil hole is closed partly by the laminated paper of a metal band coil, and the metal band coil can be automatically transported, so that elimination or reduction of labor can be attained by eliminating necessity for a crane worker and a metal band coil hanging sign maker or the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for transporting a metal strip coil with a mount inserted therein by a gate-shaped coil lifter suspended from a crane. The present invention relates to a coil lifter for automatic transportation of metal strip coils, which can accurately detect metal strip coil holes even when the metal strip coils are in contact with each other, thereby making it possible to automate the transportation of the metal strip coils.

[Conventional technology]

2. Description of the Related Art In factories that manufacture metal strips and factories that manufacture products using metal strips, there is a considerable process of suspending metal strip coils using coil lifters and transporting them to predetermined positions. There are various structures for this coil lifter, but in order to prevent the metal band coil being carried from coming off the coil lifter during transportation, an abbreviated shape is used on both sides of the arm holder that is suspended from the crane. The arm is attached so that it can approach and move away freely, and the metal band coil hanging claw, which is a horizontal member provided opposite the lower end of the arm, is inserted into the coil hole of the metal band coil to suspend the metal band. Gate-shaped coil lifters that support the coil from both sides are often used. A phototube consisting of a light emitter and a receiver is installed in the metal band coil hanging claw of the arm of this gate-shaped coil lifter to detect the metal band coil hole, and a computer is used to detect the metal band coil using the signal. An attempt has been made to automatically carry out a transport operation from one predetermined location to the next.

[Problem to be solved by the invention]

However, the dimensions (especially the height) and the hole size of the metal band coil are not uniform, and the installation position and situation of the metal band coil are likely to change due to various factors, especially the In the case of a metal band coil C with a slip paper P inserted between the metal bands as shown in Figure 4, the ends or scraps of the slip paper P may hang down or block the inside of the metal band coil hole H, causing the photocell In many cases, it is not possible to accurately detect the metal band coil hole H using the metal band coil C.
When winding up only the metal strips, the metal strips will come into contact with each other and cause scratches on the surface. Wrapping is widely practiced especially for metal strips such as stainless steel strips that require a beautiful surface quality. However, as shown in Fig. 4, the ends and scraps of this interleaving paper P often protrude from between the metal bands and block the metal band coil hole H, and as a result, the light from the phototube's projector does not penetrate into the interleaving paper P. There was a problem in that the phototube did not work or malfunctioned because it was blocked by the light and did not reach the photoreceiver. As a result, especially in the metal band coil C in which the interleaving paper P is wound, the metal band coil hole H
cannot be detected accurately, the metal band coil hanging claw of the arm cannot be accurately inserted into the metal band coil hole H, and therefore the metal band coil C cannot be reliably supported. However, there was a problem in that the operator had to check during the process and manually adjust the adjustment every time there was a malfunction.

Therefore, the problem to be solved by the present invention is to support and transport a metal strip coil formed by a mount wound between metal strips from one predetermined position to the next using a gate-shaped coil lifter suspended from a crane. At the time, the metal strip coil hole can be accurately detected even when a part of the mount wrapped between the layers of the metal strip coil is blocking the metal strip coil hole, and the metal strip coil can be reliably removed using the gate-type coil lifter. An object of the present invention is to provide a coil lifter for automatic transportation of metal band coils (hereinafter sometimes simply referred to as a coil lifter) that can be supported and automatically transported without any trouble.

[Means to solve the problem]

As a result of various studies on phototubes that can be detected by transmitting through a mount that protrudes between metal bands and blocks the metal band coil holes, the inventor found that a phototube consisting of a light emitter and a light receiver has a detection distance of 70 to 70 mm. The present invention was completed by discovering that the above problem could be solved by using a long-distance device of 100 m, which is rarely used.

Embodiments of the coil lifter according to the present invention will be described in detail below based on the drawings.

Fig. 1 is a front view of one embodiment of the coil lifter according to the present invention, Fig. 2 is a side view taken from the line A-A in Fig. 1, and Fig. 3 is a diagram showing Fig. 2 of another embodiment. FIG. 3 is a corresponding side view.

In the drawing, 1 is a gate-shaped coil lifter, and a crane (
An arm holder 2 suspended from an arm holder 2 (not shown) and abbreviated arms 4, 4 provided on both sides of the arm holder 2
It is equipped with Reference numeral 3 denotes an arm opening/closing drive device for driving the arms 4, 4 toward and away from each other on the arm holder 2, and 5, 5 denotes a metal band coil, which is a horizontal member provided at the lower end of the arms 4, 4. It is a hanging claw. 6,6' is.

They are provided at the top and bottom of the metal band coil hanging claws 5, 5, respectively, and have projectors 6a, 6a' and receivers 6b, 6b'.
It is a phototube with a detection distance of 70 to 100 m, and its emitters 6a, 6a' and receivers 6b, 6b' may be oriented in the same direction at the top and bottom, but as shown in FIG. If the lower part is arranged oppositely, the floodlight 6a
.

Since the light traveling from 6a' to the light receivers 6b and 6b' does not interfere with each other, the detection accuracy of the metal band coil hole H is further improved. As a phototube with a detection distance of 70 to 100 m, for example, FE7D- manufactured by Yamatake Honeywell Co., Ltd.
One example is the TC6-902 type. Further, as shown in FIG. 3, two or more phototubes 6, 6' are arranged on at least one of the upper and lower parts of the metal band coil hanging claw 5.5, and the arrangement shape of the phototubes 6, 6' is changed to triangular or triangular. Rectangle (
(not shown), the detection accuracy of the metal band coil hole H is further improved. 7, 7, when the movement position of the gate-shaped coil lifter 1 is wrong or when the mounting position and orientation of the metal band coil C are inappropriate, the lowermost ends of the arms 4, 4 are moved to other places such as the metal band coil C. This is a limit switch for detecting contact with an object and stopping the descent of the coil lifter 1 in advance, and is disposed at the lowest end of the arms 4, 4. 8, 8 are arms 4, 4 of the gate-shaped coil lifter 1.
When inserting the metal band coil suspending claws 5, 5, which are horizontal members provided at the lower end, into the metal band coil hole H of the metal band coil C, the inner side surfaces of the arms 4, 4 are attached to the metal band coil. This is a limit switch for detecting contact with the side surface of C and stopping the arms 4, 4 from coming closer than necessary, and is disposed on the inner side surface of the arms 4, 4. 9, 9 is a transmission type phototube with a detection distance of 10 m or less that detects to prevent the lower surface of the arm holder 2 from coming into contact with the upper surface of the metal band coil C due to the lowering of the gate-shaped coil lifter l too much. It is installed directly below the arm holder 2.

10 is a tilt detection mechanism for detecting the tilt of the coil lifter 1; the simplest one is mercury sealed in a sealed container with an electrode contact at one end; when the sealed container is tilted, the mercury moves to the position of the electrode contact; A mercury switch that reaches the point where the electrode contacts become energized is reliable, inexpensive, and easy to use.

[For production]

When the metal band coil C is to be transported from a predetermined position to the next position by the coil lifter for automatic transport of metal band coils according to the present invention having the above-described configuration, first, the arm opening/closing drive device 3 is driven. With the arms 4, 4 separated from each other, the coil lifter 1 is moved by a crane directly above the target metal band coil C placed at a predetermined position and in a predetermined condition. Next, when the coil lifter 1 is lowered, the light from the light emitter 6a' of the phototube 6' provided at the lower part of the metal band coil hanging claws 5, 5 is first blocked by the outer peripheral surface of the metal band coil C. Subsequently, when the phototube 6' descends until it is located in the metal band coil hole H, the projector 6a
The light from ' passes through the metal band coil hole H to the receiver 6b'
The light is received by the When the coil lifter 1 is subsequently lowered, the light from the light emitter 6a of the phototube 6 provided above the metal band coil hanging claws 5, 5 also passes through the metal band coil hole H and is received by the light receiver 6b. When the light receivers 6b, 6b' of both phototubes 6, 6' are both in the light receiving state, at that point the arms 4, 4 are moved in the direction closer to each other by the arm opening/closing drive bag W3, and the metal band coil hanging claws 5, 5 is inserted into the metal band coil hole H so that it can support the metal band coil C. Therefore, the crane lifts the coil lifter 1.
When the metal band coil C is raised, the metal band coil C is supported by the metal band coil hanging claws 5, 5, lifted up, and transported to the next predetermined position.

In the coil lifter 1 for automatically transporting metal band coils according to the present invention which has the above-described function, the phototubes 6 and 6' provided at the upper and lower parts of the metal band coil hanging claws 5 and 5 are usually used most of the time. Detection distance is 70~
It needs to have a long range of 100 m, and if the detection distance is shorter than 70 m, the light from the projectors 6a and 6a' will be wrapped around the glabella of the metal band coil C (usually 20 to 80 g/M). is used) in a state where a part of the metal band coil hole is blocked, the receiver 6b,
On the other hand, if the length is longer than 100 m, the light will not pass through up to 6b', and it will not only be expensive, but also the width of the optical axis will become too wide, causing the upper and lower light to interfere with each other, reducing the detection accuracy of the metal band coil hole H. This is because there are things to do. In addition, in such a transportation operation of the metal band coil C, the emitter 6a and the light receiver 6b of the phototube 6, which are arranged at the upper part of the metal band coil hanging claw 5, and the light receiver 6b, which is arranged at the lower part of the metal band coil hanging claw 5, are moved. If the directions of the phototube 6' and the light emitter 6a' and the light receiver 6b' are opposite to each other, the light emitter 6a,
Since the light traveling from 6a' to the light receivers 6b and 6b' does not interfere with each other, the detection accuracy of the metal band coil hole H is improved, which is preferable.
, 5 has a detection distance of 70 to at least one of the upper and lower parts.
If two or more phototubes 6 and/or 6' consisting of a 100 m emitter 6a and/or 6a' and a receiver 6b and/or 6b' are arranged, false detection of the metal band coil hole H is reduced. It is preferable. Further, if a limit switch 7 is disposed at the lower end of the metal strip coil hanging claws 5, 5 to detect contact with other objects including the metal strip coil C and stop the descent of the coil lifter 1, Even if the moving position of the coil lifter 1 is incorrect, or if the mounting position and orientation of the metal band coil C are inappropriate, the lowest ends of the arms 4, 4 may come into contact with the metal band coil C, etc., and the metal band This can prevent the coil C from being scratched or the arms 4 of the coil lifter 1 from being damaged. Further, a limit switch 8 is arranged on the inner side surface of the arms 4, 4 to detect contact with the side surface of the metal strip coil C and stop the arms 4, 4 from approaching more than necessary.
When inserting the metal band coil hanging claws 5, 5, which are horizontal members provided at the lower end of the arm 4゜4, into the metal band coil hole H of the metal band coil C, the inner side surfaces of the arms 4, 4 are A pair of phototubes 9 of a transmission type with a detection distance of less than Ion are arranged directly under the arm holder 2 to prevent damage to the metal band coil C and the coil lifter 1 itself due to contact with the side surface of the metal band coil C. By doing so, it is possible to prevent the coil lifter 1 from being lowered too much and the lower surface of the arm holder 2 coming into contact with the upper surface of the metal band coil C and damaging the metal band coil C and the coil lifter 1 itself. On the other hand, if a tilt detection mechanism 10 such as a mercury switch for detecting the tilt of the coil lifter 1 is provided, it is similar to the limit switch 7 installed at the lower end of the metal band coil hanging claws 5, 5 as described above. Not only can the functions and effects be expected, but it can also prevent unexpected accidents such as poor support of the metal band coil C, falling off during transportation, and significant damage to the coil lifter 1 due to the coil lifter 1 being tilted more than necessary. be.

〔Effect of the invention〕

As described in detail above, the coil lifter for automatic transportation of metal band coils according to the present invention is a gate-type coil lifter in which a photocell consisting of a light emitter and a light receiver with a detection distance of 70 to 100 m is attached to the metal band coil hanging claw of the arm. By disposing them at the top and bottom, even if a part of the mount of the metal band coil covers the metal band coil hole, the light passes through the mount and the metal band coil hole can be detected accurately. Automatic transportation of metal strip coils is now possible, eliminating the need for crane personnel, metal strip coil lifting signal personnel, etc., making it possible to save labor and ensuring that the transportation of metal strip coils can be automated, allowing the process to flow smoothly. This will improve productivity.

Furthermore, in the case of a configuration in which the emitter and receiver of the phototube are arranged in opposite directions at the top and bottom, the light traveling from the emitter to the receiver does not interfere with each other, which improves the detection accuracy of the metal band coil hole. The detection distance is further improved, and the detection distance is 70 to 1 on at least one of the upper and lower parts of the metal band coil hanging claw.
If two or more phototubes consisting of a 00m projector and a light receiver are arranged, there is less fear of measurement errors.

When a limit switch is placed on the lower end of the metal band coil hanging claw or on the inner side of the arm, or a pair of transparent phototubes with a detection distance of 10 m or less are placed directly under the arm holder. Even if the moving position of the coil lifter, the mounting position of the metal band coil, and its orientation are incorrect, the lowest end of the arm may come into strong contact with the metal band coil when the coil lifter is lowered, damaging the metal band coil or damaging the bottom end of the arm. When inserting the metal band coil suspension claw provided on the arm into the metal band coil hole of the metal band coil, the inner side of the arm may come into strong contact with the side of the metal band coil, damaging the metal band coil or damaging the coil. It is possible to inexpensively and easily prevent the phenomenon in which the lifter is lowered too much and the lower surface of the arm holder comes into strong contact with the upper surface of the metal band coil, causing damage to the metal band coil, as well as damage to the coil lifter itself. Furthermore, if a tilt detection mechanism such as a mercury switch is provided to detect the tilt of the coil lifter, it is possible to prevent the coil lifter from tilting more than necessary and causing an unexpected accident.

The present invention, which has various effects as described above, has great industrial value.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the coil lifter according to the present invention, Fig. 2 is a side view taken from the line A-A in Fig. 1, and Fig. 3 is a diagram showing Fig. 2 of another embodiment. The corresponding side view, FIG. 4, is a perspective view showing a state in which the mount or the like protrudes from between the metal bands and partially blocks the metal band coil hole. In the drawings: 1...Gate-shaped coil lifter 2...Arm holder 3...Arm opening/closing drive device 4...Arm 5...Claw for hanging metal band coil 6. 6'...Phototubes 6a, 6a'...Emitter 6b, 6b'...Receiver 7...Limit switch 8...Limit switch 9...Phototube 10...・Inclination detection mechanism C...Metal band coil H...Metal band coil hole P...Mount board figure

Claims (1)

[Scope of Claims] 1 Approximately L-shaped arms (4, 4) on both sides of an arm holder (2) suspended from a crane; metal band coil hanging claws (5, 5) consisting of horizontal members at the lower ends thereof; In the gate-shaped coil lifter (1), the coil lifter (1) is made up of a light emitter (6a, 6a') and a light receiver (6b, 6b') with a detection distance of 70 to 100 m. (6, 6') are metal band coil hanging claws (5, 4) of the arms (4, 4), respectively.
, 5) A coil lifter for automatically transporting a metal band coil, characterized in that it is disposed at the upper and lower parts of the coil. 2. The emitter (6a) and receiver (6b) of the phototube (6) placed above the metal band coil hanging claw (5) and the lower part of the metal band coil hanging claw (5) Emitter (6a') and receiver (6b') of phototube (6')
2. The coil lifter for automatic transportation of a metal band coil according to claim 1, wherein the directions of the coil lifter and the coil lifter are opposite to each other. 3 At least one of the upper and lower parts of the metal band coil hanging claws (5, 5) is equipped with a floodlight (with a detection distance of 70 to 100 m).
6a, 6a') and receiver (6b, 6b').
Claim 1, wherein more than one photocell (6, 6') is arranged.
Or a coil lifter for automatic transportation of metal band coils according to 2. 4. From claim 1, wherein a limit switch (7) is disposed at the lower end of the metal strip coil hanging claws (5, 5) to detect contact with another object and stop the lowering of the coil lifter (1). 3. A coil lifter for automatic transportation of metal band coils according to any one of items 3 to 3. 5 Attach the metal band coil (C
) A limit switch (8) is arranged for detecting contact with the side surface of the metal band coil and stopping the approach of the arms (4, 4). Coil lifter for transportation. 6. The automatic metal strip coil according to any one of claims 1 to 5, wherein a pair of phototubes (9) of a transmission type with a detection distance of 10 m or less are arranged directly under the arm holder (2). Coil lifter for transportation. 7. The coil lifter for automatic transportation of metal strip coils according to any one of claims 1 to 6, wherein the gate-shaped coil lifter (1) is provided with an inclination detection mechanism (10) for detecting the inclination thereof. 8. The coil lifter for automatic transportation of metal strip coils according to claim 7, wherein the inclination detection mechanism (10) is a mercury switch.