JP2528482B2 - Block mat gripping method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention uses a lifting beam to lay a block mat in which a concrete block is fixed to the surface of a filter cloth made of synthetic fiber on a slope. The present invention relates to a method of gripping a block mat when raising it.

[Prior art]

As the gripping device for lifting the block mat, the one described in Japanese Patent Publication No. 61-35332 has been generally used. This device was attached to both ends of the hoisting beam, and had a structure in which the pressing member was opened and closed by moving the lever up and down, and the surplus end of the block mat was tightly held and hoisted. Since the lever is opened and closed by input in this device, the structure is heavy and labor-intensive, and there is a problem in that the entire device is complicated and heavy and the crane truck becomes large.

[Object of the Invention]

The present invention has been made in view of the above problems.
An object of the present invention is to propose a method of gripping a block mat, which is easy to grip, does not require heavy labor, has excellent workability, and can reduce the weight of the gripping device.

[Structure of Invention]

In the method of grasping the surplus ends where the blocks on both ends of the block mat where the concrete blocks are fixed on the surface of the filter cloth made of synthetic fiber are not fixed at both ends of the lifting beam, a small gap is provided at each end of the lifting beam. While holding the two parallel gripping rods, the matte ends of the mat are folded back and doubled to be inserted into the small gaps, respectively, and the mating ends are folded back and the locking rods are inserted into loops. This is characterized in that the mat excess end is gripped between the grip bars.

Hereinafter, description will be made with reference to the illustrated embodiment. In FIGS. 1 and 2, gripping portions 2 are attached to both ends of a hoisting beam 1 which is hoisted by a boom (not shown) of a mobile crane. The gripping portion 2 is composed of gripping rods 3 and 3 made of two steel pipes arranged in parallel with a small gap and a frame member 4, and is attached to the beam 1 via a slide plate 5. The slide plate 5 is fixed to a desired position of the beam 1 by bolting, and the grip portion 3 is mounted by attaching a bracket 6 protruding from the upper surface of the frame member 4 to the slide plate 5 with a pin 7 as a shaft. There is. A shackle 8 is projectingly provided on the upper surface of the beam 1, and a suspension wire 9 for suspending with a boom of a mobile crane is connected to the shackle 8.

The block mat 10 is formed by laying and fixing a substantially rectangular parallelepiped concrete block 12 on the surface of a filter cloth 11 made of synthetic fiber woven or non-woven fabric, and an extra end 13 to which the block 12 is not fixed is provided at both ends. There is. In order to hoist this block mat 10 with the hoisting beam 1, the extra end portion 13 is folded back and doubled to be inserted between the gripping bars 3 of the gripping portion, and the extra end portion 13 is folded back to form a loop. Insert the locking bar 14 of square wood into the place. When the beam 1 is lifted in this state, a frictional force is generated between the double portion of the extra end portion into which the locking rod 14 is inserted and the two gripping rods 3 and the load of lifting is applied. Also, the surplus end does not slip out and is gripped between the gripping bars 3, 3.

In this state, the mat is grasped, lifted and carried down to a predetermined position, the locking rod 14 is pulled out, and the mat excess end 13 is grasped by the grasping rods 3, 3
Release the grip from the space and lay it on the ground surface.

In this embodiment, a steel pipe is used for the grip bar and a square bar is used for the locking bar, but the present invention is not limited to this. But the gripping bar,
It is preferable that the locking rod has a high friction coefficient with the extra end portion and is hard to slip. A square bar is suitable for use as a locking bar, since the extra end thereof is less likely to slip.

[Operation and effect of the invention]

The method of gripping the block mat is to fold the extra ends of both ends of the mat into double folds and insert them into the small gaps, respectively. The extra mat part can be gripped between the two parts, and the gripping can be released by pulling out the locking rod, which eliminates the need for heavy labor and is excellent in workability. Further, the device is simple and does not require a complicated device, and thus the device can be reduced in weight and cost.

[Brief description of drawings]

FIGS. 1 (a) and 1 (b) are a front view and an enlarged view of a gripping portion in a state where a block mat is gripped and lifted by a lifting beam,
FIG. 2 is a perspective view of the grip portion. 1 ... Lifting beam, 2 ... Gripping part, 3 ... Gripping rod, 4
...... Frame material, 5 ... Slide plate, 6 ... Bracket, 7 ...
… Pins, 8 …… shackles, 9 …… hanging wires, 10…
… Block mat, 11 …… Filter cloth, 12 …… Concrete block, 13 …… Extra end, 14 …… Locking rod.

Claims (1)

(57) [Claims] 1. A method of gripping a surplus end portion of a block mat formed by fixing a concrete block on a surface of a filter cloth made of a synthetic fiber to the end portions of the block mat not fixed, at both ends of the suspension beam. Two parallel gripping bars are provided in each part with a small gap between them, and the extra ends of both ends of the mat are folded back to be doubled and inserted into the small gaps, respectively, and the extra ends are folded back to form a loop. A method of gripping a block mat, characterized in that a matte end portion is gripped between gripping rods by inserting a locking rod into the mat.