JPH0524681U - Free vibration control device for suspended loads - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a device capable of freely selecting rocking and rocking prevention of a lifting magnet used for assembling a steel sheet pile. [Structure] A suspension beam 3 is provided at the lower end of a vertically extending mast 2 and a lifting magnet 10 is suspended from the suspension beam 3 by a chain 4 to suspend a crane 13 used for incorporating a shipping material of steel products. The arms 5 are fixed on both sides of the beam 3 obliquely downward and
A sheave 6 is provided at the tip of the suspension beam 3, a drum 7 is rotatably provided at the bottom of the suspension beam 3 via a bracket 11, and a clutch 9 for restraining the rotation of the drum 7 is provided. A vibration-damping device for hanging loads, characterized in that both ends of the rope 12 are fixed to both ends of the lifting magnet 10 while being wound.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a free-vibration device for suspended loads, and more particularly, to a device for completely suspending suspended loads of a crane with a lifting magnet used to incorporate the shipping form of steel materials, especially steel sheet piles. It is a thing.

[0002]

[Prior Art]

 Generally, there are two types of shipping configurations for steel sheet piles that are shipped as products: the tying posture shown in Fig. 5 (a) and the plate stacking posture shown in Fig. 5 (b), and it is necessary to incorporate them into this packaging after rolling. Conventionally, a crane with a lifting magnet as shown in FIGS. 3 and 4 is used, and a steel sheet pile 1 is provided by a lifting magnet 10 (hereinafter referred to as a “lift mag”) suspended by a chain 4 on a suspension beam 3 which does not swing horizontally. Was held in the hugging posture (FIG. 5 (a)) and the plate stacking posture (FIG. 5 (b)). As shown in Fig. 3, the riff mug 10 must be swung when it is installed in the tying posture, and the riff mug 10 must be stopped when it is installed in the dish stacking posture, as shown in Fig. 4. Therefore, it was incorporated in the tying posture with a large amount of weight without attaching a steady rest. Therefore, when incorporating into the plate stacking posture, it was necessary to wait until the swing of the riff mug diminished, which resulted in a long assembling time and a large decrease in 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 Publication No. 56-128377, Japanese Utility Model Publication No. 56-40179 and Japanese Utility Model Publication No. 60-85584.

[0003]

[Problems to be solved by the device]

 In the device of Japanese Utility Model Laid-Open No. 56-128377, the end of the wire that directly lifts the load of the suspended load is connected to the restoring device, the absorbing device and the balance bar that prevent the swinging of the hook. Is large and heavy, and is not suitable for cranes that generally require weight reduction. Also, 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. Japanese Utility Model Laid-Open No. 56-40179 is a device for oscillating a suspended load by arranging the hoisting wire that has passed through the sheave of the hoisting device so that it can be used as a trap. Japanese Utility Model Laid-Open No. 60-85584 is a device for suspending a suspended load by stretching a swing-off wire different from the winding wire in a V shape when viewed from the front and side. All of them are intended to reduce the swing of the suspended load, and neither the suspender nor the suspended load completely prevent the swing. As described above, there are various devices for stopping the swing of the suspended load, but there is no structure that allows the swing and swing of the suspended load to be freely selected. The present invention solves the problems of the conventional device, prevents the production capacity from decreasing due to an increase in the amount of incorporation in the plate stacking posture, swings the riff mug when the steel sheet piles are in the tying posture, and installs it in the dish stacking posture. The purpose of the invention is 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]

[Means for Solving the Problems]

 The present invention provides a suspension beam at the lower end of a vertically extending mast, and a crane used for assembling a steel material shipping form in which a riff mag is suspended by a chain from this suspension 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. The gist of the present invention is a universal vibration control device for a suspended load, characterized in that the rope is wound around the rope and both ends of the rope are fixed to both sides of the riff mag.

[0005]

[Action]

 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 installed in the plate stacking position, the clutch is closed to restrain the rotation of the drum, and the rope is tensioned to stop the riff mug.

[0006]

【Example】

 The present invention will be described below based on the illustrated embodiments. As shown in FIGS. 1 and 2, a swinging device for suspending a load according to the present invention includes a riff mag 10 suspended by a chain 4 on a suspension beam 3 that does not swing horizontally by a vertically extending mast 2. In the crane 13 which is used for incorporating the shipping load of steel materials, the arms 5 fixed to both sides of the suspension beam 3, the sheave 6 provided at the tip of the arm 5 and the center bottom of the suspension beam 3 are rotatably fixed. The drum 7, the clutch 9 for restraining and releasing the rotation of the drum 7, and the rope 12 fixed to the brackets 11 fixed to both sides of the riff mag 10 and wound around the sheave 6 and the drum 7. Become. Since the crane 13 in FIG. 1 does not swing the riffmag suspension beam 3 horizontally due to the vertically extending mast 2, the swing of the riffmag 10 and the steel sheet pile 1 as the suspended load occurs in the chain 4 and below. Therefore, as shown in FIG. 3, when the steel sheet pile 1 is assembled in a laid-up posture, it is necessary to swing the riff mug 10 and the steel sheet pile 1 in order to ensure the assembly, but in this case, the clutch 9 is released. By doing so, the drum 7 is freely rotated and the riff mag 10 is swung. On the contrary, when the steel sheet pile 1 is installed 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 ensure the assembly in a short time. The clutch 9 is closed to restrain the rotation of the drum 7, and the rope 12 is tensioned to stop the riff mug 10. If the clutch 9 is an electromagnetic clutch, the clutch 9 can be remotely operated, and swinging and swinging of the riff mag 10 can be easily selected, which is effective. Table 1 shows the assembling time of the steel sheet pile in the stacking posture of the present invention in comparison with the case of using the conventional device. By using the present invention, the assembling time is 30% or less. 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]

[Effect of the device]

 As described above, the present invention is a general-purpose embedding machine that significantly shortens the time for assembling steel sheet piles in the plate stacking posture and is easy to assemble in the tying posture, and has a simple structure, light weight, and It 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 a 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) Inventor Kenzaburo Horiuchi 597 Yokokura, Oyama City, Tochigi Prefecture Japan Hogeki Co., Ltd. Oyama Plant

Claims (1)

[Scope of utility model registration request] 1. A crane for use in incorporating a shipping load of steel material, in which a lifting beam is provided at the lower end of a vertically extending mast and a lifting magnet is suspended by a chain from the hanging beam, on both sides of the hanging beam. An arm is fixed in a diagonal 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. A free vibration isolator for a suspended load, characterized in that the rope is wound around and both ends of the rope are fixed to both sides of the lifting magnet.