JPH0672518B2 - Liner plate covering method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a lining method for covering the inner surface of a dug shaft or the like with a liner plate, which can be performed easily.

(Prior art) The lining that covers the wall of the dug hole with a liner plate
The wall surface is covered with a liner plate each time it is dug to a certain depth. That is, the liner plates are connected from top to bottom as the holes are dug. As is well known, the liner plate has a flange for connecting to the four circumferences of the corrugated plate, and a large number of holes provided in the flange are used to connect and fix the plate vertically and horizontally with bolts and nuts.

The connecting work will be performed down to the bottom of the dug hole. When connecting below, connect a new liner plate under the previously installed liner plate with bolts and nuts. Therefore, two people should lift up both sides of the liner plate to be attached, and while pushing the upper flange of the liner plate against the lower flange of the upper liner plate which is already fixed, insert bolts into the holes of both flanges with nuts. It will be fixed. In general, liner plates are often 500 mm high and 1 m or more in length. In other words, it is 500mm with a flange on the periphery.
Two people support both ends of a steel plate with a thickness of 1000 mm (usually 30 kg to 50 kg) with one hand each, while using the other hand to insert a bolt into the hole and screw the nut with one hand to fix it I had to do some work. Moreover, this is the work at the bottom of the hole that was dug as described above,
In addition, the work had to be performed while maintaining a moderate waist, and the work was extremely difficult.

(Problem to be Solved by the Invention) An object of the present invention is to provide a lining method that solves the above-mentioned difficulty of work and can easily connect the liner plates.

[Structure of the Invention] (Means for Solving the Problem) The present invention is to fix the upper end of a hole dug from the ground by first covering it with a liner plate as in the conventional case, and further fixing the liner to the dug portion. Attach the flanges to the plate, insert the insertion part of the separately prepared temporary fastener into the overlapping holes of the upper and lower liner plates, and sandwich the flanges of the upper and lower liner plates in the slits provided in the temporary fastener. The lower liner plate is temporarily fixed to the upper liner plate, and then the upper and lower flanges are fixed with bolts and nuts.

(Operation) As described above, according to the present invention, the insertion portion of the temporary stopper is inserted into the holes of the flanges of the upper and lower liner plates, and the slits provided in the temporary stopper are inserted into both flanges for temporary fixing. The bolts and nuts can be fixed in any posture.

(Example) FIG. 1 is an example of a temporary stopper used in the present invention.
It is made of one steel plate. Insert 1 and slit 2
It has a shape in which it is connected to the gripping portion 3 formed with the connecting portion 4 and is folded in a V-shape at a portion continuing from the connecting portion 4 to the gripping portion 3.

The lining method of the present invention using the above temporary fastener will be specifically described. The liner plates 5 and 7 used are generally used conventionally and have flanges 6 and 8 having holes 9 in the periphery.

It is assumed that the upper liner plate 5 is already fixed. Two workers are fixed by holding both ends of the liner plate 7, the upper liner plate 5 is applied from below, and the insertion portions 1 of the temporary fasteners held in one hand respectively.
Are inserted into the holes 9 of the flanges 6 and 8 in contact with each other and rotated, and the slits 2 sandwich the flanges 6 and 8 from each other. This work can be performed very easily with one hand, since the insertion portion 1 originally designed to enter the hole 9 is simply inserted into the hole and the grip portion 3 is gently rocked.
The liner plate 7 is held by the liner plate 5 because the flange 8 is like a pin and is sandwiched together with the flange 6. The two ends of the flange can be held stably only by temporarily fixing them at two places.

After that, fix it with bolts and nuts. Since the lower liner plate 7 is held on the upper one by this temporary stopper, the work can be performed easily with both hands in a desired posture without supporting the liner plate 7. After fixing with bolts and nuts, remove this temporary stopper and tighten the holes where the insertion part 1 was inserted with bolts and nuts.

The temporary fastener used in the present embodiment is bent at the connection portion 4 as described above. This is when the insertion portion 1 is turned with the hole 9 inserted and the flanges 6 and 8 are inserted into the slit 2. This is for facilitating the insertion into the container, and the bending position and the bending angle may be anywhere. Further, it is desirable that the slits 2 have a sufficient width by inserting the two flanges 6 and 8 of the thickest liner plate.
Further, it is desirable that the position where the slit 2 is provided in the grip portion 3 is a position where the flanges 6 and 8 are inserted when the insertion portion 1 is inserted into the hole 9 to the root and rotated.

Also, in this temporary fastener, the insertion portion 1 is also plate-shaped, but this is because it is cut from one plate as described above. For example, when it is made of casting, this portion is cylindrical. Is desirable. Although steel is preferable in terms of material, plastic can be used because the liner plate can be temporarily held and bolts can be used for immediate fixing.

[Advantages of the Invention] As described above, according to the present invention, if the holes of the flanges are fitted together, the insertion portions of the temporary fasteners are inserted therein, and the flanges are inserted into the slits, the upper liner plate and the lower liner plate are inserted. You can temporarily fix the plate, and then remove the liner plate from your hand and fix it with bolts and nuts, so you can easily work in the middle waist while supporting the heavy liner plate in a very short time . Therefore, it is significantly easier than the conventional work.
At the same time, the flanges can be positioned by inserting the insertion portions into the holes of both flanges.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a temporary fastening tool used in the present invention, and FIG. 2 is a perspective view of a state where the temporary fastening tool is temporarily fastened. 1: insertion part, 2: slit, 3: grip part, 4: connection part.

Claims (1)

[Claims] 1. In a lining for covering an inner surface of an excavated hole with a liner plate provided with a flange having a large number of holes in the periphery, the upper end of the hole dug down from the ground is first covered and fixed with a liner plate, and further dug down. In the part, the other liner plate is made to contact the flange from the bottom to the fixed liner plate above, and the insertion part of the temporary fastener is inserted into the overlapping hole of the flange of the liner plate above and below, and the temporary fastener is Insert the flanges of the upper and lower liner plates into the slits provided, temporarily fix the lower liner plate to the upper liner plate, and then,
A liner plate lining method characterized by fixing the upper and lower liner plates with bolts and nuts.