JPS6019132Y2 - Sand control sheet equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sand control sheet device used in underwater civil engineering work such as embankment construction work.

For example, in the construction of an embankment, as shown in Figure 1, a soft water-shielding sand control plate 1 is laid out in advance on the bottom of the water at the location where the embankment will be installed, and stones S, which will serve as the foundation, are dumped on top of it. A construction method is adopted in which an embankment is constructed on top of the sand control board 1.

This is because if rubble is placed directly on the water bottom without installing sand control boards, the earth and sand around the foundations A and B will be dug up due to the force of water currents caused by tidal currents, muddy currents, and waves. In addition to weakening the foundation, if there is significant digging,
This is to prevent water from flowing under the foundation and causing the ground at the bottom to sink, causing serious obstacles to construction work.

However, since the water bottom area in which the sand control board 1 should be installed is quite wide, it is practically difficult to form the sand control board 1 from a single sheet, and in general, a large number of standard-sized sand control boards are used. A sand control board made of interconnected sheets is used.

Therefore, in the work of spreading out the sand protection plates, it is necessary for the diver to manually connect the sand protection sheets spread out on the bottom of the water one after another.

By the way, when many large sheets are connected side by side on the ground, for example in the case of an awning, a method is often used in which a rope is threaded through the eyelets of the sheets on both sides. , has the advantage of high connection strength, but this method is unsuitable for the work of divers who must carry out the work under water because the sewing operation is troublesome.

Here, in the conventional sand control sheet connection method, as shown in FIGS. 2 and 3, each adjacent sand control sheet 2, 3 has a bag piece made of the same sheet material near one end to be connected. 4 is welded to the bag piece 4 of one sheet 2,
A horizontally long ring metal fitting 5 is held, and a hook metal fitting made of an elastic wire formed into a bart shape by folding both ends inwardly in a V-shape is attached to the bag piece 4 of the other sheet 3 via a ring rope 6. 7 is installed.

Therefore, in order to connect both sheets 2 and 3, each end 2a
, 3a are superimposed, and the hook fitting 7 is pressed against the ring fitting 5.

However, such conventional anti-sand sheets have the following drawbacks.

(a) Since the ring metal fittings 5 and hook metal fittings 7 of both sheets 2 and 3 must be accurately opposed underwater, a great deal of effort is required for the connection operation, and the operation is difficult because the hooks tend to be slanted. .

(b) It is necessary to push and engage the other ring fitting 5 between both ends of the hook fitting 7 which has been folded back into an inward V shape. It is necessary to hold the metal fittings 5 with both hands, align them accurately, and push both metal fittings in opposite directions, and since both metal fittings are elastic, this pushing operation underwater is extremely troublesome.

(C) Since the welded area of the bag piece 4 is small, the bag piece 4 tends to separate from the sheet, or the sheet around the bag piece 4 tends to tear.

(d) Since a diagonal tensile load component is applied to the hook metal fitting 7 and the ring metal fitting 5, the metal fittings 5 and 7 are deformed and broken, and the hook metal fitting 7 is likely to come off.

The present invention has been made in order to eliminate the above-mentioned drawbacks. Namely, the purpose of the present invention is to provide a sand-proof sheet device that facilitates the operation of connecting sheets underwater and has a large connection strength. There is a particular thing.

Hereinafter, the present invention will be explained based on the illustrated embodiments.

In the sand control sheets of the embodiments that are adjacent to each other, as shown in FIGS. 4 to 8, one of the sheets 8 has a side edge 8.
A rope 9 is stretched along the line a, and the middle part of the rope is pulled into the back side of the seat from 8b into each attachment hole drilled in the seat 9 at appropriate intervals, and is further inserted into the washer 10. After being inserted, it is tied to prevent it from coming out.

In addition, after the other sheet 11 has its side edge folded back,
The bag portion 11a is formed by polymerization and welding, and the front sheet of the bag portion 11a is provided with mounting holes 11b at appropriate intervals.
, both ends of the short mounting chamber 13 inserted into the base ring 12a of the hook fitting 12 are drawn into the back side of the seat, and both ends of the mounting chamber 13 are inserted into the washer 14, and then They are electrically connected to each other to prevent them from coming off.

Thus, the hook fitting 12 is formed by bending both ends of the intermediate straight portion of the elastic wire into a circular shape inwardly facing each other. On the right side of the drawing, an oval retaining ring 12b is formed in the horizontal position of the straight part with its tip facing the proximal direction of the hook fitting 12 in an overlapping manner. It is formed as a polymer in the horizontal position.

Note that a gap 12c is left in the lateral direction between the tip of the engagement ring 12b and the lateral position of the straight portion.

Since the sheets 8 and 11 of the embodiment are formed in this way, in order to connect both sheets 8 and 11, the side edge 8a of the sheet 8 is inserted under the bag portion 11a of the sheet 11. After that, it is only necessary to pull the metal fitting 12 toward the seat 11 with the intermediate part of the hook metal fitting 12 placed on the rope 9. In this way, the rope 9 can be pushed open the gap 12c while holding the retaining ring 12b. After entering the inner hole, the rope 9 cannot be removed from the inner hole, so the two sheets 8 and 11 are connected by the hook fitting 12 and the attachment chamber 13.

However, in the connection operation described above, since the hook fitting 12 can be freely hooked onto any part of the rope 9, even if there is a positional shift between the two sheets 8 and 11, the connection can be made without any problem. In addition, since the metal fitting 12 is hooked in a hook type, the metal fitting 12 can be hung with one hand, making it easy to operate underwater.

In addition, metal washers 10.14 are interposed at the attachment portions of the rope 9 and the attachment chamber 13 to prevent tensile loads from being applied directly to the sheets 8, 11.
In addition to preventing the sheets 8 and 11 from tearing and the ropes 10 and cables 13 from coming off, the high rigidity of the hook metal fitting 12 prevents disconnection due to deformation of the metal fitting 12.

In particular, the tensile load during connection is applied only in the orthogonal direction of the rope 9, and no unreasonable external force is applied to the metal fitting 12.
From this point of view as well, the resistance of the connection portion is large.

In addition, in the formation mode of the hook metal fitting used in the configuration of the embodiment, instead of the metal fitting 12 described above, as in the hook metal fitting 15 shown in FIGS. 9 and 10, the outer R of the base ring 15a and the engagement ring 15b If you use a metal fitting with a smaller size, metal fitting 1
No diagonal load is applied to 5, and its tensile strength is further increased.

As described above, according to the sand control sheet device according to the present invention, the hook fitting attached to the other sheet is hooked onto the rope stretched on one of the sheets to be connected, thereby connecting both sheets to the side. Since it is configured to connect by interlocking, it is possible to hook the hook to any part of the rope, which not only facilitates the connection operation underwater, but also increases the installation strength of the connecting member and the connection resistance. This has the effect of making it easier to apply the method.

In addition, in the present invention, the engagement ring 1 at the tip of the hook metal fitting is
The engagement work is completed by hooking the inner jaw part of 2b (15b) on the opposing rope 9 and pulling it toward you. This has the effect of making the engagement work more efficient.

[Brief explanation of the drawings] Figure 1 is a construction drawing of the embankment showing the manner in which sand control plates are laid out;
Figure 2 is a perspective view of a conventional sand control sheet, and Figure 3 is a perspective view of a conventional sand control sheet.
4 is a perspective view of a sand control sheet device showing an embodiment of the present invention, and FIGS. 5 and 6 are a side view of the connection taken along the line V line and Vl-V
7 is an enlarged view of the hook fitting shown in FIG. 5, FIG. 8 is a plan view thereof, and FIG. 9 is a front view of the hook fitting shown in another embodiment. The figure is a plan view of the same. 1... Sand control board, 8... One sheet, 9... Rope, 11... Other sheet, 12.15... ...Hook metal fittings.

Claims (1)

[Scope of utility model registration request] In a sand-proof sheet device that can constitute a sand-proof plate for the bottom circumference by connecting a large number of sheets, one of the adjacent sheets connected to each other by side-to-side engagement has a side edge. A rope is stretched along the seat, and the rope is attached to the seat at intermediate points at appropriate intervals, and
On the other sheet, a hook metal fitting formed of a plurality of elastic wires is attached to the side edge of the sheet so that the proximal end thereof is aligned, and the distal end side of the hook metal fitting, which is hooked on the rope, is attached to the side edge of the other sheet. It is characterized in that it is folded back into a substantially circular shape toward the proximal end, and the tip of the folded back forms a retaining ring that overlaps with the straight line section in the middle of the hook fitting toward the distal end of the hook fitting. Sand control sheet equipment.