JPS5819594B2 - tetra pot clamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to provide a clamp that can safely and reliably lift a tetrapod during installation work.

Hereinafter, details of one embodiment of the present invention will be described with reference to the drawings.

1 is a tetrapot clamp of the present invention.

The structure is such that a horizontally projecting edge 2B is formed on the outer periphery of the upper edge of the cylindrical inner case 2 having a bottom plate 2A, and a ridge 2B is formed on the bottom plate to fit into the vertical upright portion 3A of the tetrapot 3. The circular hole 2C is opened, and the bottom 3B of the tetrapot is formed on the lower edge of the outer periphery of the inner case.
Three hooks 2D that engage and disengage are attached to the inner wall of the cylindrical outer case 4 provided on the outer periphery of the inner case so as to be able to rise and fall freely at equal intervals. The upper and lower receiving plates 4A, 4 that come into contact with each other
A guide roller 4C is provided on the lower edge of the outer case to engage and disengage the upper edge 2D' of the hook 2D to raise and lower the hook, and
A main winding wire 2E is connected to the upper edge of the inner case, and an auxiliary winding wire 4D is connected to the upper edge of the outer case.

G is the rubber pad. Next, the method of using the present invention will be explained together with its effects.

As shown in Fig. 1, the main winding wire is loosened, the auxiliary winding wire is tensioned, and the circular hole 2C is fitted into the vertical upright part of the tetrapod.

In this case, the hook is in an open state.

When the inner case settles on the tetra pot as shown in Fig. 2, the outer case descends and the hook is pressed by the guide roller to the closed state, and the curved portion of the lower end of the hook enters the bottom of the tetra pot from three sides.

Then, as shown in Figure 3, loosen the auxiliary winding wire and hoist it up with the main winding wire.

At this time, the hook is pressed inward by the guide roller, and the tetrapod is securely gripped.

Furthermore, when removing the tetrapod from the clamp, it is preferable to have the opposite effect to that described above.

As described above, the present invention is useful in that it is possible to reliably and safely support a tetrapod having a shape that is difficult to support with an easy operation.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a longitudinal cross-sectional view, FIGS. 2 and 3 are longitudinal cross-sectional views showing the operation, and FIG. 4 is a cross-sectional view showing the state of the tetrapod and hook. FIG. 5 is a cross-sectional view showing the relationship between the hook and the guide roller. 1... Clamp, 2... Inner case, 2c... Circular hole, 2D... Curved hook, 4... Curved outer case, 4C... Guide roller.

Claims (1)

[Claims] 1. A cylindrical inner case having a bottom plate has a horizontally projecting edge formed on the outer periphery of the upper edge, and a circular hole is opened in the bottom plate to fit into the vertical upright part of the tetrapot,
Moreover, on the lower edge of the outer periphery of the inner case, three hooks that engage and detach from the bottom of the tetrapod are swingably attached at equal intervals, and on the inner wall of the cylindrical outer case provided on the outer periphery of the inner case. is provided with upper and lower receiving plates that come into contact with each other as the inner case moves up and down, and a guide roller is provided on the lower edge of the outer case that engages with and disengages from the upper edge of the hook to raise and lower the hook. , and a tetrapot clamp characterized in that a main winding wire is connected to the upper edge of the inner case, and an auxiliary winding wire is connected to the upper edge of the outer case.