JPH01127720A - Screw pipe-type stay anchor - Google Patents

Abstract

PURPOSE:To lay anchors without having to remove the screw auger by a method in which a stay anchor is formed by providing a crew blade on the periphery of a base pipe, a stopper on the inner surface, and a shaft core-receiving hole in a screw auger at the inner center. CONSTITUTION:A screw blade 6 is attached to the periphery of a base pipe 1, and a shaft hole 3 to bear the tip of the earth auger shaft core is provided at the inner center. A stopper 5 facing the screw excavating blade of the earth auger is also provided to the inner surface of the pipe 1. A junction branch plate 7 connecting branch lines is fixed by bolt to the periphery of the pipe 1. The anchor can thus be quickly buried without having to remote the screw auger.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a stay anchor for a branch line stretched between the L portion of a utility pole and the ground in order to prevent the utility pole from falling down.

(b) Conventional technology A stay anchor with screw blades attached to the outer periphery is disclosed in Japanese Patent Application No. 61-212578 filed by the same applicant.
As shown in Figure 6, this anchor has a cross-shaped reinforcing frame bltvA installed inside the foundation pipe a, and a square rotating box C is fixed at the center of the frame. Is the foundation pipe a forcibly screwed into the excavated auger hole via its screw ld?
First, remove the digging blade on the earth auger side from its drive shaft, and then attach the tip of the square drive shaft to the rotating box C.
They are trying to collude with each other.

(8) Problems to be Solved by the Invention The above-mentioned earth auger was originally used for digging holes for utility poles, so its screw cutting blade was designed to be removable due to its structure. However, in the past, there was almost no need for this, and the current situation is that it is fixed semi-permanently.

The weight of this cutting blade alone is several hundred kilograms, and it is extremely dangerous to remove it from the drive shaft by hand. Therefore, the work must be done on a suitable ground away from the travel destination, using a screwdriver. The connecting screw must be removed by twisting the blade into the ground to prevent it from falling.

In addition, in the case of reconnection, the drive shaft must be cleaned and then reattached by applying grease, etc. Therefore, the work is extremely troublesome, requires time and effort, and is inefficient. There was a problem.

(d) Means for solving the problem Therefore, in the present invention, when burying the foundation pipe using an earth auger, after removing the foundation pipe using a screw digging blade as in the conventional method, the foundation pipe is attached to the drive shaft. Instead of attaching the screw cutting blade to the drive shaft, the basic pipe is attached to the tip of the screw cutting blade, which saves the trouble and time mentioned above. This enables efficient burial work.

The present invention will be described in detail below based on embodiments shown in the drawings.

(E) Embodiment Figure 1 is a plan view of the stay anchor of the present invention, Figure 2 is a side view thereof, Figure 3 is a perspective view of the same anchor, and Figure 4 is a screw digging blade on the earth auger side and the present invention. It is a partially cutaway side view showing a state of connection with a stay anchor.

3 in the drawing, the code l is the foundation pipe, and its inner diameter is the same as the screw drilling blade l on the earth auger side, as shown in the 4th drawing.
It is formed to be slightly larger than the outer diameter of the hole 0 so that the digging blade 10 can be inserted easily.

2 crosses the center of the foundation pipe l and connects both ends to the foundation pipe l
1 and 5 are horizontal rods with a U-shaped cross section welded and fixed to the inner periphery of the rod, with a shaft hole 3 bored in the center and a reinforcing tube 4 fixed to the outer periphery.
Both ends are welded to the inner wall of the foundation pipe 1 using molded stoppers, and the bent pieces 5a are welded and fixed to the horizontal rod 2. 6 is a screw blade fixed to the outer periphery of the foundation pipe 1, which goes around the pipe 1, and one end is formed into an arcuate blade part 6a as shown in Fig. 1, so that it can be easily screwed into the soil. That's what I do. In addition, the screw blade 6
is fixed to the foundation pipe l so as to be located below the position of the horizontal rod 2 as shown in Fig. 2, and the resistance of the screw blade 6 is made as effective as possible against the upward pulling force by the branch line 15 (Fig. 5). This is to reduce the slope of the foundation pipe 1 in the soil.

Reference numeral 7 designates a middle-layer support plate connected to the branch line, and the rear end is fixed with a bolt 11 via a U-shaped support frame 8 welded and fixed to the horizontal rod 2 and the inner circumference of the vibrator, and a frame part 9 fixed to the upper part of the inner circumference. It is fixed. 1
2 is a leading blade protruding from the lower edge of the foundation pipe l, and 13 is a reinforcing plate for the screw 'R6.

(f) In the stay anchor of the present invention, which consists of a component that has more than the function,
When tensioning the branch line, after drilling the auger hole 14 with the earth auger as shown in Figure 5, the shaft core tip 10a of the screw drilling blade lO is fixed to the WIA driving shaft (not shown) of the earth auger. is inserted into the shaft hole 3 via the reinforcement @ 4, and its blade tip lOb is brought into opposing contact with the stopper 5. In this state, when the earth auger is started and the screw digging blade 10 is rotated and lowered, the foundation pipe 1, which is held at the tip of the screw digging blade 10 by the shaft hole 3 and the stopper 5, is integrated into one piece. The screw blade 6 is rotated and lowered to bite into the circumferential wall of the auger hole 14 and enter the auger hole 14, stop advancing at a predetermined position, and reverse the screw drilling blade lO to move the foundation pipe l to the bottom of the auger 14. , and the m-cutting blade 10 is pulled up.

In this way, the auger hole 14 shown in FIG.
Finish the locking work.

(G) Effects of the Invention As described above, according to the present invention, the use of an earth auger when burying an anchor equipped with screw wings is similar to the conventional example mentioned at the beginning, but In installation.

Conventionally, it was necessary to remove the screw cutting blade from the drive shaft of the earth auger, but in the present invention, the screw cutting blade is left as it is, and a basic vibe is attached to the shaft hole 3 and stopper 5 at the tip. It is possible to operate by locking the screw, and it can be removed very easily by reversing and raising the drive shaft, especially when removing the screw drilling blade.

When it comes to putting it on again, it is possible to eliminate extremely complicated work and to perform the work of putting it on and taking it off quickly and smoothly, which is extremely useful for improving efficiency at the site.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the anchor of the present invention, Fig. 2 is a side view of the same anchor, Fig. 3 is a perspective view thereof, and Fig. 4 shows the state of connection between the screw digging blade on the earth auger side and the anchor of the present invention. FIG. 5 is a side view showing the state of the anchor connected to the branch line in response to a pulling load, and FIG. 6 is a plan view of the anchor as an example of the conventional art. l - Basic vibe 3 - Shaft hole 5 - Stopper 6 - Screw blade lO - Screw drilling blade 10a - Shaft tip November 11, 1985 Patent applicant Tokyo Electric Power Co., Ltd. Fig. 1 1... Basic pipe No. Figure 3

Claims (1)

[Claims] A shaft hole for supporting the tip of the shaft core of the earth auger is provided at the center of the inside of the foundation pipe with screw blades attached to the outer periphery, and a stopper is provided inside the foundation pipe to face the screw drilling blade that surrounds the tip of the shaft core. The screw pipe type stay is characterized in that the base pipe is forcibly screwed into the soil and buried by inserting the tip of the shaft core into the shaft hole and rotating the screw digging blade so as to face the stopper. anchor.