JPH0741748Y2 - Free vibration control device for suspended loads - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a free-vibration damping device for suspended loads, and more specifically, it completely suspends suspended loads of a lifting magnet-equipped crane used to incorporate shipping materials such as steel sheet piles. The present invention relates to a device that enables

[0002]

2. Description of the Related Art Generally, a steel sheet pile, which is shipped as a product, is shipped in a tying posture shown in FIG.
There are two types of stacking postures shown in, and it is necessary to incorporate them into this packing after rolling. Conventionally, a crane with a lifting magnet shown in FIGS. 3 and 4 is used, and a steel sheet pile 1 is suspended by a lifting magnet 10 suspended from a chain 4 (hereinafter referred to as a “lift mag”) on a suspension beam 3 that does not swing horizontally. It was incorporated in the tying posture (FIG. 5A) and the plate stacking posture (FIG. 5B). As shown in FIG. 3, the riff mug 10 needs to be swung when it is installed in the tying posture, and the riff mug 10 needs to be shaken when it is installed in the dish stacking posture as shown in FIG. Therefore, it was incorporated without adjusting the steady rest in the tying posture with a large amount. Therefore, in assembling in the plate stacking posture, it is necessary to wait until the vibration of the riff mug is attenuated, which results in a long assembling time and greatly lowering the production efficiency. If the production efficiency is not reduced, the same method is used in the warehouse, which requires a large installation space and reduces the warehouse capacity. Further, as a vibration damping device for a suspended load using a drum, a sheave, and a wire, there are devices such as Japanese Utility Model Laid-Open Nos. 56-128377, 56-40179, and 60-85584.

[0003]

[Problems to be solved by the invention]
Since the device of No. 77 connects the end of the wire that directly lifts the load of the suspended load to the restoration device, the absorption device, and the balance bar that prevent the swing of the hook, these steady rests become large and heavy. , Generally not suitable for cranes that require weight reduction. Further, it prevents the swinging of the hook, and is not effective for damping the suspended load below the hook, and does not completely prevent the suspended load. Actual Kaisho 56
No. -40179 is a device for arranging the hoisting wire that has passed through the sheave of the hoisting device so that it can be hung on to suspend the suspended load. Japanese Utility Model Laid-Open No. 60-85584 is a device for suspending a suspended load by tensioning a swinging wire other than the winding wire in a V shape when viewed from the front and side. Both are intended to reduce the swing of the suspended load,
The hoisting equipment and the hoisting load do not completely prevent the runout. As described above, there are various devices for stopping the swing of the suspended load, but none of them has a structure in which the swing and the swing of the suspended load can be freely selected. The present invention solves the problems of the conventional device, prevents the production capacity from decreasing due to the increase in the amount of incorporation in the plate stacking posture, swings the riff mag when the steel sheet piles are in the tying position, and installs in the plate stacking posture. It is an object of the present invention to make it possible to freely select the contradictory requirements of vibration suppression of the riff mug and to provide an inexpensive device as a simple and lightweight structure.

[0004]

SUMMARY OF THE INVENTION The present invention provides a crane used for incorporating a steel material shipping form in which a lifting beam is provided at the lower end of a mast that vertically expands and contracts, and a riff mag is suspended from the hanging beam by a chain. In the above, the arms are obliquely fixed to both sides of the suspension beam, the sheave is provided at the tip of the arm, the drum is rotatably provided at the bottom of the suspension beam via the bracket, and the clutch capable of restraining the rotation of the drum is provided. SUMMARY OF THE INVENTION A gist of the present invention is a universal vibration control device for a suspended load, characterized in that a rope is wound around the drum and the sheave and both ends of the rope are fixed to both sides of the riff mag.

[0005]

In the present invention, when the steel sheet pile is incorporated in the tying posture, the clutch is released to freely rotate the drum and swing the riff mag. On the contrary, when the steel sheet pile is incorporated into the plate stacking posture, the clutch is closed to restrain the rotation of the drum, the rope is tensioned, and the riff mag is stopped.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the illustrated embodiments. As shown in FIGS. 1 and 2, the device for freely suspending a suspended load according to the present invention uses a riff mug 10 suspended by a chain 4 on a suspension beam 3 that does not horizontally swing by a vertically extending mast 2. In a crane 13 used for incorporating a shipping material of steel materials, arms 5 fixed to both sides of the suspension beam 3, a sheave 6 provided at a tip of the arm 5 and a drum 7 rotatably fixed to a central bottom portion of the suspension beam 3.
And a clutch 9 for restraining and releasing the rotation of the drum 7.
And a rope 12 fixed to brackets 11 fixed to both sides of the riff mug 10 and wound around the sheave 6 and the drum 7. In the crane 13 shown in FIG. 1, the riff mag suspension beam 3 does not swing horizontally due to the mast 2 which expands and contracts in the vertical direction, so the swing of the riff mag 10 and the steel sheet pile 1 that is the suspended load occurs in the chain 4 and below. Therefore,
When assembling the steel sheet pile 1 in the tying posture as shown in FIG. 3, it is necessary to swing the riff mag 10 and the steel sheet pile 1 in order to ensure the assembling, but in this case, the clutch 9
Is opened to freely rotate the drum 7 and swing the riff mag 10. On the contrary, when the steel sheet pile 1 is assembled in the plate stacking posture as shown in FIG. 4, it is necessary to eliminate the runout of the riff mug 10 and the steel sheet pile 1 in order to surely perform the assembly in a short time. 9 closed and drum 7
Rope mug 10
Take off. If the clutch 9 is an electromagnetic clutch, the clutch 9 can be remotely operated.
It is effective because the swing stop and swing can be easily selected. Table 1 shows the assembling time of the steel sheet pile in the plate stacking posture using the present invention in comparison with the case of using the conventional device. By using the present invention, the assembling time is 30% or more. Could be reduced. The incorporation into the tying posture can be performed in the same manner as in the past by opening the clutch 9.

[0007]

[Table 1]

[0008]

As described above, the present invention is a general-purpose assembling machine that greatly shortens the assembling time of steel sheet piles in the plate stacking posture, and can be easily assembled in the tying posture, and has a simple structure. It is lightweight and can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a front view illustrating the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a diagram illustrating a method of assembling a steel sheet pile.

FIG. 4 is a diagram illustrating another method of assembling a steel sheet pile.

FIG. 5 is a side view illustrating the shipping appearance of steel sheet piles.

[Explanation of symbols]

 1 Steel Sheet Pile 2 Mast 3 Suspended Beam 4 Chain 5 Arm 6 Sheave 7 Drum 8 Axis 9 Clutch 10 Lifting Magnet 11 Bracket 12 Rope 13 Crane

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenzo Horiuchi, 597 Yokokura, Oyama City, Tochigi Prefecture, Japan Koho Machinery Works, Ltd. Oyama Plant (56) References: 56-128377 (JP, U) -85584 (JP, U) Actual opening Sho 60-72478 (JP, U) Actual opening Sho 53-66774 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A crane used to incorporate a shipping load of steel material, in which a lifting beam is provided at a lower end of a vertically extending mast, and a lifting magnet is suspended from the hanging beam by a chain, on both sides of the hanging beam. An arm is fixed in an oblique direction, a sheave is provided at the tip of the arm, a drum is rotatably provided at the bottom of the suspension beam via a bracket, and a clutch capable of restraining the rotation of the drum is provided, and the drum and the sheave are provided. A free-vibration device for suspended loads, characterized in that the rope is wound and both ends of the rope are fixed to both sides of the lifting magnet.