JPS637650Y2 - - Google Patents

Description

[Detailed explanation of the invention] In order to lift materials such as mortar onto scaffolding in a construction workplace, a supporting arm is protruded from the top of the scaffolding, a pulley is attached to the tip of the supporting arm, and a lifting rope for lifting the load is attached to this. It is common practice to hoist the hoisted material onto the scaffold and lift it up and down using a winch, but in this method, when lifting the hoisted material onto the scaffolding, the worker leans forward and applies considerable force to the hoisted material. It is necessary to carry out dangerous work such as pulling the object with a hand.

In order to safely and easily carry out the loading work without having to perform such dangerous work, the present invention has a system that, after lifting the material, rotates and pulls the protruding jib to easily pull the material up to the top of the scaffold. After that, the jib automatically returns to its original position.If we explain its structure with reference to the embodiment shown in the drawings, 1 is a column of a load lifting device made of, for example, angle iron. Mounting seats 2, 2' are fixed at a predetermined interval at the ends, and a jib 3 made of a pipe or the like as shown in Figs. 1 to 3 is fixed to the center of the front side, and a pulley is attached near the tip. 4 as the pivot 5
At the same time, a pulley 6 is also attached to the attachment part of the jib 3 to the pillar 1 by a support shaft 7,
A lifting rope, which will be described later, is strung between these two pulleys.

The load hoisting device constructed as described above is used by being attached to a suitable position on the upper part of a scaffold as shown in FIG. In other words, the mounting seats 2, 2' provided on the pillar 1
For example, a support girder 1 is installed on the top of the building site 9 of the scaffold body 8 in accordance with the spacing between the upper and lower mounting seats 2, 2' of the pillar 1.
0 and 11 support seats 12 and 12', the upper part is a ball bearing 13 the lower part is a thrust bearing 1
3', and is rotatably mounted on support shafts 14, 14', and a restoring spring 15 with an arm made of, for example, a helical spring is installed on the lower support shaft, and is fixed to the support seat 12'. Pin 17 and support rod 18 fixed to column 1
is held between the arms 16 and 16' of the restoring spring 15 with arms. Therefore, as the pillar 1 rotates, the restoring spring 1 with arm
5, the arm opens and then returns to its original position due to the repulsive force.

When using this hoisting device installed on the scaffold as described above, one end of the hoisting wire rope 19 is fixed to the jib 3 side, it is folded upward from the bottom, and a load hook 26 is attached to the folded part. The hoisting wire rope 19 is strung around the pulleys 4 and 6 by a movable pulley 20 attached to the movable pulley 20, extended downward, and its tip is attached to the winding drum of the winch 21 for hoisting and lowering work. be. In order to prevent the hoisting wire rope from being over-wound, a pulley 22 is provided at the tip of the jib 3, a rope 23 is stretched around it, and a ring-shaped weight 2, for example, is attached to the lower end of the pulley 22.
4 is fixed and the hoisting wire rope 19 is loosely inserted into its internal hole, and the other end is connected to the limit switch 25 installed on the column 1 along the jib 3, so that the movable pulley can be used in case of overwinding. 20 contacts the weight 24 and operates a limit switch to stop overwinding.

To explain the operation of the load lifting and taking-in device configured as above, material A is hooked onto the hook 26 of the movable pulley 20, and the winch 21 is operated to hoist the material to a predetermined height. , Fuku26
When the jib 3 is pulled from above the scaffold, the jib 3 rotates around the support shafts 14, 14' of the column 1, and the hoisted material A can be taken onto the scaffold as shown in FIG. If the hook 26 is released after taking in the material in this way, the restoring spring 15 with arm can automatically return it to its original position.

As described above, according to the device of the present invention, the jib itself rotates around its spindle to take the hoisted materials onto the scaffold, so that the materials suspended from the jib can be easily transported onto the scaffold. This allows safe work to be carried out without the dangers of conventional methods.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of the load lifting and taking-in device of the present invention, Fig. 2 is a sectional view taken along line X-X' in Fig. 1, Fig. 3 is a sectional view taken along line Y-Y' in Fig. 1, and Fig. 4 is a sectional view taken along line X-X' in Fig. The figure is a plan view of the restoring spring with an arm of the present invention, FIG. 5 is a side view of how it is attached to a scaffold, and FIG. 6 is a plan view showing the rotating state of the jib. 1... Pillar of load lifting device, 2, 2'... Mounting seat,
3... Jib, 4... Pulley, 5... Support shaft, 6... Pulley, 7... Support shaft, 8... Scaffolding body, 9... Scaffold construction site, 10, 11... Support girder, 12 , 12'... Support seat, 13... Ball bearing, 13'... Thrust bearing, 14, 14'... Support shaft, 15
...restoring spring with arm, 16, 16'... arm of restoring spring with arm, 17... pin, 18... support rod, 19...
Lifting wire rope, 20...Moving pulley, 21...
...Winch, 22...Pulley, 23...Rope, 2
4... Weight, 25... Limit switch, 26...
Futsuku, A...Lifting materials.

Claims (1)

[Scope of utility model registration request] Mounting seats 2, 2' are provided at both ends of a column 1 of the load lifting device, and a jib 3 is provided protruding from the front side of the column 1, and pulleys 4, 6 are provided on which a lifting wire rope 19 is stretched. and pillar 1 of this load lifting device.
, the support shaft 14 provided on the upper and lower mounting seats 2, 2',
Support girder 1 provided on the upper part of the scaffold body 8 by 14'
The device is rotatable relative to the support seats 12 and 12' of columns 1 and 12, and both end arms of the helical spring are connected to the mounting seat 2' of the column 1 and the corresponding support seat 12'. This is a load lifting and taking-in device for a scaffold in a construction workplace, etc., which is equipped with a restoring spring 15 with an arm for restoring a rotating column.