JP2003160293A - Coil lifter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil lifter that can convey a plurality of divided coils at a time and reduce a space for placing a metal coil. <P>SOLUTION: This coil lifter is constituted to engage and support the metal coil 31 by inserting lower end claws 4a, 4b of coil grip arms 3a, 3b suspended in a horizontally movable manner, into an inner diameter space part 32 of the metal coil 31. The claws 4a, 4b are composed of fixed claws, intermediate claws and inner claws and formed to be expandable to allow the inner claws of the claw 4a and claw 4b to approach each other. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil lifter which lifts a metal coil and moves the metal coil by hanging it, and in particular, a metal coil which is manufactured in an iron mill or the like and is used for automobiles, home appliances and the like. The present invention relates to a coil lifter suitable for moving a vehicle.

[0002]

2. Description of the Related Art Conventionally, various types of coil lifters for moving a metal coil have been known, for example, there is one shown in FIG. The coil lifter shown in FIG. 7 has arms 3a and 3b that are horizontally movable.
The fixed claws 4a and 4b provided at the lower end of the metal coil 31
The inner diameter space 32 of the
It is movable, and the arms 3a and 3b are provided at both ends of the arm slide portions 2a and 2b. Arm 3
Proximity switches 33 and 33 are built in a and 3b, and when the claws 4a and 4b are inserted into the inner diameter space 32 of the metal coil 31 and the side surface of the metal coil 31 approaches, the arm 3
The movement of a and 3b is stopped and the metal coil 31 is lifted.

Such a coil lifter has a width of 500 m.
This is not a problem when lifting and moving a general metal coil of m to 1700 mm, but when lifting and moving the split coil in which the width of the metal coil is divided and a plurality of split coils are bound together by a binding band. However, since the claws of the coil lifter are short, there is a problem that the split coil located at the center cannot be supported, and it is impossible to convey the split coil by such a coil lifter. [0004] Therefore, in general, the C-hook 34 having a long claw is used to convey the split coil as shown in FIG. However, when the split coil or the metal coil 31 is transported by the C hook 34, the entire C hook 34 must be moved and inserted when the claw 35 of the C hook 34 is inserted into the inner diameter space 32 of the metal coil 31. However, there is a problem that a large space is required around the metal coil 31, and when the C hook 34 is used, the number of the metal coils 31 that can be placed in the coil storage place is smaller than that when the coil lifter is used. There was a flaw.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a coil lifter capable of transporting a plurality of split coils at one time and reducing the space for placing metal coils. It was made to do.

[0005]

SUMMARY OF THE INVENTION The above problem is caused by inserting a lower end claw of a coil gripping arm movably suspended in a horizontal direction into an inner diameter space of the metal coil to support the metal coil in engagement. The coil lifter of the present invention can be solved by the coil lifter of the present invention, characterized in that the claw can be expanded and contracted. Further, the claw may be composed of a fixed claw, an intermediate claw which can be expanded and contracted, and an inner claw. That is, according to the present invention, by expanding and contracting the claws of the coil lifter, it is possible to support and convey a split coil obtained by dividing a normal metal coil into, for example, 3 to 7, which cannot be lifted and transported by a conventional coil lifter.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, referring to FIG.
It will be described with reference to FIGS. FIG. 1 shows the entire suspension type coil lifter, in which coil gripping arms 3a and 3b are provided to extend downward from both ends of arm slide portions 2a and 2b on the upper part of the coil lifter main body 1. . The arm slides 2a and 2b include an arm 3
There is provided a drive mechanism that allows the a and the 3b to approach each other and separate from each other and to adjust the mutual interval arbitrarily. Further, claws 4a and 4b are provided at the lower ends of the arms 3a and 3b.

2 to 6 show the structure of the claws 4a and 4b. The claws 4a and 4b are composed of a fixed claw 5, an intermediate claw 6 and an inner claw 7, respectively. FIG. 4 is a view of the claws 4a and 4b viewed from the tip side, that is, from the inside of the coil lifter body 1. The intermediate claw 6 is slidable inside the fixed claw 5 and the inner claw 7 is slidable inside the intermediate claw 6. Are sequentially engaged.
5 and 6 are plan views of the claws 4a and 4b.
5 shows a state in which the claws 4a and 4b are contracted, and FIG. 6 shows a state in which the intermediate claw 6 and the inner claw 7 are advanced and the claws 4a and 4b are extended. The fixed claw 5 is provided with support pins 10 and 11 for the geared links 8 and 9,
The X-shaped large links 13 and 13 connected by the connecting pin 12 are connected to 9. The connecting pin 12 is connected to the intermediate claw 6, and the connecting pin 12 is inserted into a long hole 14 provided in the fixed claw 5 in the front-rear direction. Large links 13, 13
The small links 15, 15 are connected to the small link 15,
The connecting pin 16 of 15 is connected to the inner claw 7. A connecting bar 19 is connected to an extension portion 17 of one geared link 9 by a connecting pin 18, and the other end of the connecting bar 19 is connected to a power cylinder 20 attached to the arms 3a and 3b. The fixed claw 5, the intermediate claw 6 and the inner claw 7
The surface of the metal coil that contacts the inner diameter surface of the metal coil has no step so as not to scratch the inner diameter surface of the metal coil.

The power cylinder 2 is provided on the arms 3a and 3b.
A shrinkage sensor 21 is provided in the vicinity of 0 so that the power cylinder 20 can detect the compressed state. A claw approach detection sensor 22 is provided at the tip of the inner claw 7 so as to detect when the inner claws 7, 7 of the claws 4a and 4b facing each other approach a predetermined distance. In addition, the presence detection sensor 23 is provided on the inner claw 7,
The load when the metal coil is being lifted is detected. The contraction sensor 21, the claw approach detection sensor 22, and the presence detection sensor 23 are connected to a control device (not shown). When the contraction sensor 21 detects the contraction operation of the power cylinder 20, the claw approach detection sensor 22 detects the contraction operation. The extension operation of the power cylinder 20,
At the time of detection by the presence detection sensor 23, the openings of the arms 3a and 3b are locked.

In order to lift the metal coil with this coil lifter, as shown in FIG.
Is contracted, the coil lifter main body 1 is lowered so that the metal coil 31 is positioned between the arms 3a and 3b, and the lowering is stopped when the claws 4a and 4b are positioned in the inner diameter space 32 of the metal coil 31. To do. Here, when the power cylinder 20 is extended, the connecting bar 19 and the connecting pin 18
The extension portion 17 is pushed via the geared link 9 and the geared link 8 that engages with the geared link 9 by a gear, and rotates about the support pins 11 and 10, respectively. The connecting pins 12 of the large links 13, 13 connected to the geared links 8, 9 thereby move forward in the elongated hole 14, and further, the small links 15, connected to the large links 13, 13.
The connecting pin 16 of 15 also moves forward. Since the connecting pin 12 is connected to the intermediate claw 6, the intermediate claw 6 also moves forward as the connecting pin 12 moves forward, and the connecting pin 16 moves the inner claw 7
Since the connection pin 16 is connected to, the inner claw 7 is also moved forward by the movement of the connecting pin 16 to be in the state shown in FIG.

The pawls 4a and 4b are composed of an intermediate pawl 6 which is moved by the large links 13 and 13 and an inner pawl 7 which is moved by the small links 15 and 15 and are extendable and contractible. In addition to this, the intermediate claw 6 and the inner claw 7 are formed in multiple stages, the intermediate claw 6 extends to the middle stage, and the final length is secured by the inner claw 7. By extending the claws 4a and 4b, it becomes possible to lift and move the split coil that is split into a plurality and bound by a binding band, and moves to a predetermined position. When the lifting movement is completed, the claws 4a and 4b of the coil lifter 1 are next moved.
The action of shortening is performed.

When the power cylinder 20 is contracted in the state shown in FIG. 3 in which the claws 4a and 4b are extended, the connecting bar 1 is
9 is pulled, the geared link 9 rotates about the support pin 11 as a fulcrum, and the geared link 8 also rotates at the same time. The connecting pins 12 of the large links 13, 13 connected to the geared links 8, 9 thereby move backward in the elongated hole 14, and further, the small links 15, connected to the large links 13, 13.
The connecting pin 16 of 15 also moves backward. The intermediate claw 6 and the inner claw 7 respectively connected to the connecting pins 12 and 16 move backward as the connecting pins 12 and 16 move backward, and the intermediate claw 6 and the inner claw 7 are housed in the fixed claw 5. It returns to the state shown in FIG.

The distance between the arms 3a and 3b is equal to that of the metal coil 3
The arm 3a is adjusted according to the width of 1, but when the number of split coils is small, such as 3 to 4, the arm 3a,
Since the distance between 3b is narrowed, it is not necessary to extend all the claws 4a and 4b. A claw approach detection sensor 22 is provided at the tip of the inner claw 7, and the extension operation of the power cylinder 20 is stopped by the detection of the claw approach detection sensor 22, so that the inner claws 7 can be prevented from colliding with each other. it can. In addition, when the coil lifter body 1 is lowered on the metal coil 31 to be transported, or when the coil lifter body 1 is raised on the metal coil 31 that has been detached after transportation, the claws 4a and 4b must be in a contracted state. Nail 4a,
4b collides with the metal coil 31, but the contraction detection sensor 21 is provided so that the contracted state of the power cylinder 20, that is, the contracted state of the claws 4a and 4b can be confirmed. The trouble can be avoided. Further, if the arms 3a and 3b are opened during the transportation of the metal coil 31, there is a risk that the metal coil 31 will fall, but since the arms 3a and 3b are locked so as not to open when the presence detection sensor 23 detects them, This danger is eliminated.

The coil lifter of the present invention is used by suspending the coil lifter main body 1 on the hook of an overhead crane, and the crane can be used as a power source. Further, the operator can perform operations such as adjusting the distance between the arms 3a and 3b and extending and contracting the claws 4a and 4b from the operator's cab of the crane. The nail 4
The configurations of a and 4b are not limited to those of the above-described embodiment, and the intermediate claws 6 may be expanded and contracted in multiple stages such as multiple stages.

[0014]

As is apparent from the above-described embodiment, the present invention makes it possible to simultaneously lift and convey a plurality of split coils slit in the width direction by making the claws of the coil lifter extendable. As a result, the carrying capacity of the split coil can be significantly improved, and there is an advantage that the space for placing the metal coil can be effectively utilized.
Therefore, the present invention provides a coil lifter that solves the conventional problems and has an extremely great industrial value.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view of a main portion showing the configuration of a claw portion.

FIG. 3 is a front view of a main part showing a configuration of a claw part.

FIG. 4 is a view of the nail viewed from the front.

FIG. 5 is a plan view of a claw portion.

FIG. 6 is a plan view of a claw portion.

FIG. 7 is a front view showing an example of a conventional coil lifter.

FIG. 8 is a front view showing an example of a conventional C hook.

[Explanation of symbols]

1 Coil lifter body 2a, 2b Arm slide part 3a, 3b arm 4a, 4b nails 5 fixed claws 6 middle nail 7 Inner claw 8, 9 geared links 10, 11 Support pin 12 connecting pins 13 large links 14 long holes 15 small links 16 connecting pins 17 Extension 18 connection pins 19 Connection bar 20 power cylinder 21 Shrink sensor 22 Claw approach detection sensor 23 Cargo detection sensor 31 metal coil 32 Inner space 33 Proximity switch 34 C hook 35 nails

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Osamu Sakamoto             43-4 Kitashikamo, Kagiya-cho, Tokai City, Aichi Prefecture             Owning company house No. 103 (72) Inventor Kagehiko Haraguchi             43-4 Kitashikamo, Kagiya-cho, Tokai City, Aichi Prefecture             Owning company house 305 (72) Inventor Kazuo Izumi             212 Nakakakura, Matsudo City, Chiba Prefecture F term (reference) 3F004 AA03 AB15 AD04 AD06 AH00                       EA08

Claims (2)

[Claims] 1. A coil lifter in which a claw at a lower end of a coil gripping arm movably suspended in a horizontal direction is inserted into an inner diameter space of a metal coil to engage and support the metal coil. Coil lifter characterized by flexible claws. 2. The coil lifter according to claim 1, wherein the claw is composed of a fixed claw, an intermediate claw capable of expanding and contracting, and an inner claw.