JPH0329385Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to an anchor buried in the ground to prevent the collapse of the ground such as a slope and to stabilize it, and in particular, to ensure rust prevention of the anchor head. This invention relates to an anchor that is easy to handle.

[Prior Art] It has been widely practiced in the past to bury anchors in slopes, that is, in the ground, through structures to prevent the ground from collapsing and stabilize it.

Figure 1 shows a conventional example in which an anchor is enlarged. In order to fix a concrete structure C to the ground, for example, a slope 1, a hole 2 is drilled to bury the anchor, and a plurality of tension rods are inserted into the hole 2. A steel material 3 is inserted and fixed with a pouring material, for example cement mortar 4. The tensile steel material 3 is coated with a waterproof material 5 and passed through a synthetic resin pipe, for example, a polyethylene pipe 6, and the tip of the tensile steel material 3 coming out of the polyethylene pipe 6 is fixed to an anchor head 7. anchor head 7
A plate 8 called a bearing plate is interposed between the anchor head 7 and the slope 1.
Cover with oil cap 9. Then, a steel pipe 10 called a trumpet pipe is covered to prevent rust on the exposed portion 3a of the tensile steel material, and a packing 11 is applied between the trumpet pipe 10 and the polyethylene pipe 6, and a rust preventive material such as oil is applied. Enter 12. Also, there is anti-rust material 1 inside the cap 9.
Enter 2.

[Problems to be solved by the invention] Such conventional anchors have the following problems. The trumpet pipe 10 is welded to the bearing plate 8, and the bearing plate 8 is quite large and heavy, making it difficult to attach the trumpet pipe 10 and the polyethylene pipe 6. Furthermore, although the oil cap 9 is attached to the anchor head 7 by screwing or the like, a gap is inevitably created between the oil cap 9 and the bearing plate 8, and rainwater or the like can enter the trumpet pipe 10 through the gap, causing tension. There was a problem in that the exposed portion 3a of the steel material rusted, reducing the life of the anchor.

This invention was developed to solve the problems of conventional anchors, and allows for easy installation of trumpet pipes and polyethylene pipes.It also prevents rainwater from flowing between the oil cap and bearing plate into the trumpet pipe. It is an object of this invention to provide an anchor that does not cause the inconvenience of rusting the tensile steel material and shortening the life of the anchor.

[Means for solving the problem] Therefore, according to the present invention, another plate having a smaller diameter than the bearing plate and having a tapered thread formed on the outer periphery is interposed between the bearing plate and the anchor head. An anchor for protecting the ground such as a slope is provided by welding the tip of a trumpet pipe to a plate and screwing and fixing an oil cap to a tapered screw formed on the outer periphery.

The trumpet pipe is welded to a separate, smaller diameter plate rather than the larger, heavier bearing plate, which reduces overall weight and makes it easier to handle. Easy to install with pipes. In addition, the trumpet pipe is welded to a plate different from the bearing plate interposed between the bearing plate and the anchor head, and the oil cap is fixed by screwing into a tapered screw formed on the outer periphery of the plate. Therefore, rainwater and the like will not enter the trumpet pipe between the bearing plate and the anchor head, and rusting of the tensile steel material due to rainwater can be prevented as much as possible.

[Example] Hereinafter, an example of the present invention will be described with reference to FIG. Note that the description of the same parts as the conventional example shown in FIG. 1 will be omitted.

In the illustrated example, the tip 3b of the tensile steel member 3 protruding from the slope 1 is fixed to the anchor head 7 by a fixing wedge 7a. Bearing plate 8
A tapered screw 13 having a smaller diameter than the bearing plate 8 and having a tapered outer circumference is connected between the bearing plate 8 and the anchor head 7.
Another plate 13 having a shape a is interposed therebetween, and the tip of the trumpet pipe 10 is welded 14 to the plate 13. trumpet pipe 10
A packing is provided between the and polyethylene pipe 6 as described above, and the packing consists of a V packing 11a and a presser ring 11b. A tightening ring 15 is placed over the insertion portion of the polyethylene pipe 6 of the tensile steel material 3 to reduce the diameter of the entire tensile steel material. An oil cap 9 is screwed into and fixed to a tapered screw 13a formed on the outer periphery of the plate 13 interposed between the bearing plate 8 and the anchor head 7.

[Operations and Effects of the Invention] According to the invention, the trumpet pipe is welded to a plate different from the bearing plate, which has a smaller diameter and weight than the bearing plate, so it is easy to handle and can be easily used with the trumpet pipe during construction. Synthetic resin pipes such as polyethylene pipes can be easily installed. In addition, the trumpet pipe is interposed between the bearing plate and the anchor head, welded to a separate plate from the bearing plate, and fixed by screwing an oil cap into a tapered screw formed on the outer periphery of the plate. Therefore, rainwater does not enter the trumpet pipe from between the bearing plate and the anchor head as in the past, and rusting of the tensile steel due to rainwater is prevented as much as possible, extending the life of the anchor. It can be expanded significantly.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing a part of a conventional anchor for protecting slopes, and Fig. 2 is a longitudinal cross-sectional view showing a part of the main parts of an anchor according to an embodiment of the present invention. It is. 3... Tensile steel material, 4... Injection material, 6... Polyethylene pipe, 7... Anchor head, 8...
Bearing plate, 9...Oil cap, 1
0...Trumpet pipe, 11...Patzkin,
12... Rust preventive material, 13... Plate, 13a...
Tapered screw, 14...welding part.

Claims (1)

[Scope of utility model registration request] A tensile steel material is buried in the ground such as a slope and fixed with injection material, the tensile steel material is passed through a synthetic resin pipe, the tip of the tensile steel material that protrudes above the ground is fixed to the anchor head, and an oil cap is attached to the anchor head. Place a bearing plate between the anchor head and the ground, cover the exposed part of the tensile steel protruding from the synthetic resin pipe with the trumpet pipe, put rust preventive material inside the trumpet pipe, and remove the exposed part of the tensile steel. In an anchor designed to prevent rust, another plate having a smaller diameter than the bearing plate and having a tapered thread formed on the outer periphery is interposed between the bearing plate and the anchor head, and a trumpet pipe is attached to the plate. An anchor for buried in the ground, characterized in that the tip is welded and an oil cap is screwed and fixed to a tapered screw formed on the outer periphery.