JPS6319397Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an anchor for stays on utility poles, etc.
In particular, the present invention relates to an anchor in which a rectangular resistance plate is driven into several pieces in the longitudinal direction, bent into a polygonal shape, and positioned substantially perpendicular to the direction of tension of the branch line.

Referring to the drawings, in Fig. 1, 1 is a rectangular resistance plate with a pointed triangular tip, and in some cases both ends 1a are bent for reinforcement as shown in Fig. 3. 2a and 2b are notches and small holes that serve as weakened sections for dividing the resistance plate 1 into several parts A to D in its longitudinal direction and bending it as shown in Fig. 1, and 3 is a U-shaped metal fitting fixed to the back surface of the top piece D, which serves as a guide for the driving bar 13 and receives the impact of the driving tool pipe 10. 4 is a metal fitting fixed to the approximate center of the back surface of the bottom piece A at a right angle to the plate surface and in the longitudinal direction of the plate 1, and the lower end of the driving bar 13 that is passed through the U-shaped metal fitting 3 abuts on its upper surface. The metal fitting 4 is an approximately triangular sheet metal as shown in the figure, and the split groove 16 at the lower end of the driving bar 13 is fitted into and abuts on its upper part.

5 is a plate-shaped bracket provided at right angles to the approximate center of the surface of the second bent segment B from the bottom and in the longitudinal direction of the plate 1; 6 is a branch line attachment rod connected to the bracket 5 in a freely tiltable manner; 7 is a plate-shaped bracket The branch line attachment rod guide rod 7a fixed to the surface of the uppermost piece D is a guide ring at the upper end of the rod 7.

The anchor of the present invention is buried using the following special tool. Reference numeral 10 denotes a driving tool pipe, 11 a blow receiving part at the upper end thereof, and 12 a blow transmitting part at the lower part of the pipe 10, which transmits the blow to the U-shaped fitting 3 of the resistance plate 1.

The driving rod 13 is inserted halfway into the tool pipe 10 from below, and a sliding elongated hole 15 formed in a part of the circumferential surface of the driving rod 13 is loosely engaged with a sliding pin 14 of the tool pipe 10.

Reference numeral 17 denotes a hammer which is provided with upper and lower striking rods 18 and 19, one striking rod 18 being shorter than the other one 19 and also shorter than the distance between the upper end of the tool pipe 10 and the upper end of the driving rod 13 therein.

When the resistance plate is stood on the ground and the driving rod 13 and the extension cylinder part 12a of the impact transmission part 12 are passed through the U-shaped metal fitting 3, the lower end of the driving rod 13 comes into contact with the upper part of the metal fitting 4.
The impact transmission part 12 at the lower end of the tool pipe 10 abuts on the upper surface of the U-shaped metal fitting 3. At that time, the sliding pin 14
is located at the lower end of the sliding elongated hole 15.

As shown by the chain line in FIG.
When brought into contact with the shaped metal fitting 3, the striking rod 18 and the driving rod 1
There is a gap between 3 and 3. In this state, hold the striking rod 19 and gripping rod 20 on the opposite side with your hands and move them up and down, and hit the striking receiver 11 at the upper end of the tool pipe with the hammer 17.
The impact force is transmitted from the receiving part 11 to the pipe 10 to the impact transmitting part 12 to the U-shaped fitting 3, and the resistance plate 1 enters straight into the soil.

Even if the weakened portions 2a and 2b are provided during this approach, the thickness of the resistance plate is designed to be rigid enough not to bend. Further, since the driving rod 13 is fitted into the metal fittings 3 and 4, the resistance plate 1 is not bent backwards against the desired direction. Also, plate-shaped triangular metal fittings 4 and brackets 5
also has the function of stabilizing the biting direction and guiding straight forward movement.

At this time, the sliding groove 15 and pin 14 prevent the driving rod 13 from floating up.

When the set scheduled depth is reached, strike rod 1
8 from the tool pipe 10, insert the long striking rod 19 on the opposite side into the pipe 10 as shown in FIG. The striking rod 19 does not touch the upper end striking surface 11 of the triangular metal fitting 4.
After that, hit the upper side of the upward slope (Fig. 2).

Therefore, the impact force is transmitted from the rod 19 to 13 to the triangular metal fitting 4 to the bottom piece A, and the bottom piece A is pushed forward from the back and bent from the weakened portion just above it.

Due to the bending, the lower end of the driving rod 13 comes off from the metal fitting 4, and around that time, the hammer 17 hits the impact receiving part 11 of the tool pipe 10, and passes through the U-shaped metal fitting 3 to the resistance plate 1.
Enter. At this time, the driving rod 13 moves straight to keep the driving direction stable.

Thereafter, as the resistance plate 1 is driven in, the weakened portion 2a is affected by the earth pressure applied to the lower surface of the divided piece that has already bent and changed direction, and the blow received by the uppermost piece D from the U-shaped metal fitting 3 on the back side. , 2b are buckled and bent sequentially as shown in FIG.
0, and the driving is completed when the upper end of the branch line attachment rod 6 coincides with the mark 21 on the tool pipe 10.

After completing the driving, the hammer 17 is inserted into the tool pipe 10 and the hammer 17
Pull out the striking rod 19 and turn the handle 22 fixed to the upper end of the tool pipe 10 to remove the tool pipe 1.
0. Pull up the driving rod 13 to complete the installation.

A driving anchor for bending a resistance plate into a polygonal shape is disclosed, for example, in Japanese Patent Publication No. 49-36569, but the known anchor is designed to prevent bending while driving the resistance plate straight to a predetermined depth. A regulating rod is passed through a semi-cylindrical metal fitting provided on the front surface of each bent section, and the regulating rod is struck to transmit a striking force to the lowermost section. After reaching the planned depth, the regulating rod is removed, the upper end of the resistance plate is struck, and the earth pressure resistance applied to the lower surface of the semi-cylindrical metal fitting of the lowermost piece causes it to bend. The bending angle is regulated by the collision of the end faces of the semi-cylindrical metal fittings.

In the present invention, in a resistance plate 1 having weakened parts 2a and 2b for bending, a U-shaped metal fitting 3 is provided on the back surface of the uppermost piece D of the bending section to receive a driving impact force, and A plate-shaped triangular metal fitting 4 is provided approximately in the center at right angles to the surface of the resistance plate 1 and in its longitudinal direction,
During the driving operation, the split groove 16 at the lower end of the driving rod 13 passed through the metal fitting 3 is fitted into the upper part of the triangular metal fitting 4, and a plate-shaped bracket is placed approximately in the center of the surface of the second segment B from the bottom. 5 is provided perpendicular to the plate surface and in the longitudinal direction, when driving the resistance plate, the selection of the plate thickness, material, etc. of the resistance plate 1 and the straight-line guiding action of the triangular metal fitting 4 and bracket 5 are combined. , the structure is such that it does not bend from the weakened part while it is being driven to the planned depth.

Therefore, in order to advance straight to the predetermined depth, the regulating rod is passed through a semi-cylindrical metal fitting provided on each segment, and when the predetermined depth is reached, the regulating rod is inserted into a long pull-out rod connected to the top and a pull-out handle at its upper end. The structure of the resistance plate and the process of driving to a predetermined depth are different from the above-mentioned known example, which is different from that of the prior art, but the present invention is extremely simple and has low resistance during driving.

In addition, in the present invention, after reaching the planned depth, the rear upwardly inclined side of the triangular metal fitting 4 is struck through the driving rod 13 fitted to the triangular metal fitting 4 to the front of the lowest piece A. However, in this known example, when the upper end is struck and the resistance plate is moved straight, the blockage plate on the bottom of the semi-cylindrical metal fitting of the lowest piece and the upper part for connecting the branch line attached to the surface of the blockage plate are bent. Since the lowermost piece is bent by the earth pressure resistance applied to the pulling plate, the structure for bending the lowermost piece A is different, and the present invention is far superior in terms of bending function.

[Brief explanation of drawings]

Fig. 1 is a front view of the anchor of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a cross-sectional plan view taken from Fig. 1,
Figures 4, 6, and 7 are explanatory views of the driving procedure, and Figure 5 is a side view of the driving hammer. 1 is a resistance plate, A to D are bent segment pieces, 2a,
2b is a weakened part, 3 is a U-shaped metal fitting, 4 is a triangular plate metal fitting, 6 is a branch line attachment rod, and 13 is a driving rod.

Claims (1)

[Scope of utility model registration request] A rectangular resistance plate 1 with a sharp tip is provided with weakened parts 2a and 2b for bending by driving into several parts A to D in the longitudinal direction, and the back surface of the uppermost piece D of the bent parts. The lower end of the driving rod 13 passed through the U-shaped metal fitting 3 is used to fix the U-shaped metal fitting 3 which is hit by the driving tool pipe 10, and to bend the lowermost piece A of the bending section forward. A plate-shaped triangular metal fitting 4, in which the split groove 16 fits and abuts, and whose upper side receives the blow is inclined backward upward, is placed approximately at the center of the back surface of the lowermost piece A at right angles to the plate surface and in the longitudinal direction of the resistance plate 1. established in
A driving anchor in which a branch line attachment rod 6 is freely tiltably connected to a plate-shaped bracket 5 provided approximately in the center of the surface of the second bent piece B from the bottom at right angles to the plate surface and in the longitudinal direction of the resistance plate 1.