JPS5819591B2 - Bar hanging tool for crane work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hanging tool for suspending bar materials such as sheet piles by wire ropes in crane operations.

When lifting bar materials such as sheet piles and steel frames with a crane,
As a general rule, it is strictly recognized that suspended loads must not pass over other workers, but there are times when it is unavoidable for work to pass over someone's head.

For example, when constructing steel frames, driving sheet piles, etc., taking into account efficiency and other various conditions, it is unavoidable that the suspended load and the human body come close to each other and come into contact with each other.

In short, it is always dangerous work.

An object of the present invention is to provide a hanging tool that reliably prevents the above-mentioned dangers and allows safe work.

In order to satisfy the above object, the present invention is constructed as follows.

That is, the present invention has a rack 2 with a hook 1 suspended from the lower end for hooking the wire rope R to be wound around the bar S, and a large diameter pinion 5 is fixed to the shaft 4 of the pinion 3 that meshes with the rack 2. A rack 8 which is pivotally supported on the body 6 and presses a spring 7 against the rack 2 in the upward direction and engages with the large diameter pinion 5 is supported vertically on the frame 6 in parallel with the rack, and is placed below the rack 8. This is a bar hoist for crane work, which is provided with a tension arm 9 that presses the wire rope R against a bar S.

The illustrated rack 8 is provided with a pair of left and right, and the large diameter pinion 5 is also provided with two pairs.
It is installed individually.

Further, in the figure, 10 is a stopper of the rack 2, and 11 is an occluded rope suppressing body which is in contact with the wire rope R attached to the tension arm 9 and has the function of pressing the wire rope as shown in FIG.

12 is a receiving plate for the spring 7, and 13 is a permanent magnet piece for stabilizing the hook 1, which is fixed to the top of the hook 1 to prevent the hook 1 from shaking when no load is applied, and at the same time to temporarily prevent the wire rope from loosening during lifting. It excludes.

Next, in the modified examples shown in FIGS. 4 to 6, a mainspring is used for the spring 7, a groove wheel 11' is provided in place of the suppressor 11, and the mounting rod 14 of the groove wheel 1j is connected to the end of the tension arm 9. When the groove wheel 11' is inserted into the hole in the piece 9' and the wire rope R is pressed by the groove wheel 11', the groove wheel 11' is made movable so as not to come off the wire rope R.

Reference numeral 15 indicates a hanging rod between a pair of hanging pieces 16 and 16' fixed to the frame 6.

As the wire rope R, a loop-shaped wire rope as shown in FIG. 3 or a wire rope R having rings at both ends as shown in FIG. 6 is used.

Since the present invention has the configuration described above, the pitch circle ratio between the pinion 3 and the large diameter pinion 5 is set to 1:4, for example.
Assuming that a bar material S weighing 1000 kg is lifted, the hook 1 is first pulled and the rack 2 is lowered as shown in FIG. move.

Therefore, the rack 8 is also lowered. At this time, if rack 2 is
When the rack 8 is lowered by 600 mm, which is 4 times lower, the rack 8 will be lowered by an additional 450 mm. The wire rope R does not slacken during lifting, and the work can be continued safely because the wire rope R does not slacken during lifting.

In order to prevent the rope from slacking when the wire rope is tightened, the length of the wire rope R from the hook 1 to the lower end of the pressing body 11 or the groove wheel 11' is determined by the amount of movement of the rack 8 (for example, 450 mm in the above case). It needs to be short;
In this way, the wire rope will not sag and will be pulled together at the top and bottom.

[Brief explanation of drawings]

The drawings show an embodiment of the rod hoisting tool for crane work according to the present invention, and FIG. 1 is a front view of the first embodiment, FIG. 2 is a side view, and FIG. Side view of the main parts held, No. 4
The drawings are a front view showing another embodiment, FIG. 5 is a vertical side view, and FIG. 6 is a partial perspective view showing the state of use. S... Bar material, R... Wire rope, 1
...Hook, 3...Pinion, 4...
...shaft, 5...large diameter vinyl □on, 6...
...Frame, 7...Spring, 8...Rack, 9...Tension arm.

Claims (1)

[Claims] 1 A rack 2 is provided with a hook 1 for hanging a wire rope R to be wrapped around a bar S, and a large-diameter pinion 5 is fixed to the shaft 4 of a pinion 3 that engages with the hook 2, and is attached to a frame 6. A spring 7 is pivotally supported on the rack 2 so that it is raised upwardly, and a rack 8 that engages with the large-diameter pinion 5 is supported vertically on the frame 6 in parallel with the rack, and the wire is placed under the rack 8. A bar hoist for crane work, which is provided with a tension arm 9 that presses a rope R against a bar S.