JPH0410276Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a screwing tool used when burying a screw anchor that supports a branch line of a utility pole or the like underground.

(Prior art) The screw anchor 1 has the following features as shown in FIG.
A prismatic portion 3 is provided at the upper end of the core rod 2 with a tapered tip, a spiral blade 4 is provided on the outer periphery of this core rod 2, and a rod 5 is provided protruding from the upper end of this core rod 2. The rod 5 has a thimble 6 at its tip. And this screw anchor 1
To bury it in the ground, as shown in Fig. 5, remove the auger screw (not shown) from the rotary drive device 8 installed at the tip of the boom 7 of the digging pole erecting vehicle (not shown), and remove the auger screw (not shown) from the rotary drive device 8. Rectangular tubular screw tool 10
Fixing the upper end, inserting the rod 5 from which the thimble 6 of the screw anchor 1 has been removed into the screwing tool 10, and fitting the lower end of the screwing tool 10 onto the outer periphery of the prismatic portion 3 of the core rod 2. The rotary drive device 8 of the digging pole erecting vehicle is operated to rotate the screwing tool 10 and the screw anchor 1, and the screw anchor 1 is screwed into the soil from a desired ground surface.

(Problem to be solved by the invention) However, when the rod 5 of the screw anchor 1 is inserted into the screwing tool 10, the prismatic portion 3 of the core rod 2
After fitting the lower end of the screwing tool 10 to the outer periphery of the screwing tool 10, the boom 7 is moved to move the screwing tool 10 and the screw anchor 1 onto the desired ground surface. Since the screw anchor 1 would come off and fall, the worker had to move it while supporting the screw anchor 1, which was an extremely time-consuming task.

(Means for solving the problem) Therefore, this invention solves the above problem by providing a screwing tool with good workability by providing a means for removably fixing the screw anchor to the screwing tool. This is what I am trying to do.

The specific structure of this invention is a screwing tool that inserts the screw anchor rod into the pipe body and locks the screw anchor to the pipe body. Fix an annular pedestal having a hollow part to pass through, provide a screw hole passing through one side of the annular pedestal, drill a hole communicating with this screw hole in one side of the pipe body, and tighten the screw hole through this hole. It is a bolt that is screwed on.

(Function) Insert the rod of the screw anchor into the pipe body of the screwing tool of this invention, and fit the lower end of the pipe body to the outer periphery of the prismatic part of the upper core of the screw anchor, or protrude from the lower end of the pipe body. When the screw anchor is locked in the rotating direction of the pipe body by bringing the locking piece into contact with one edge of the blade on the outer periphery of the core rod, and then tightening the above tightening bolt, the hollow of the annular pedestal inside the pipe body is tightened. The rod is pushed by the end of the tightening bolt within the screw anchor and is held between the inner periphery of the hollow part of the annular pedestal and the end of the tightening bolt, thereby fixing the screw anchor to the screwing tool.

(Example) An embodiment of this invention will be described below with reference to the drawings.

A short cylindrical stopper 22, which is slightly larger than the outer diameter of the pipe body 21, is fixed to the lower end of the pipe body 21 having a constant length. This stopper 22 continues to the hollow part 23 of the pipe main body 21, and has a small diameter hollow part 22 having an inner diameter smaller than the inner diameter of this hollow part 23.
a, and a large diameter hollow part 22b having approximately the same diameter as the inner diameter of the pipe main body 21, which is connected to the small diameter hollow part 22a via a stepped part, and this large diameter hollow part 2
From the lower end of the side wall of 2b, a locking piece 24 having an arcuate cross section has a straight edge 24a on one side and an inclined edge 24b on the other side.
have. Two annular pedestals 25 for fixing rods are fixed at a distance from each other in the hollow portion 23 in the middle of the pipe body 21. Each of these annular pedestals 25 is made of a thick cylindrical body, and the inner periphery of the lower end of the cylindrical body is tapered open. Further, one side of each of these annular pedestals 25 has a screw hole 26, and a hole 27 having a larger diameter than this screw hole 26 is provided on one side of the outer circumference of the pipe 21 corresponding to this screw hole 26. Each of the screw holes 26 through each hole 27
A butterfly bolt 28 is screwed onto the holder. Further, a columnar support 29 is fixed to the upper end of the pipe body 21, and a hole 30 for attaching to a rotary drive device of a drilling pole erecting vehicle, which will be described later, passes through the side surface of the support 29. .

In the case of this embodiment, the thimble 6 of the screw anchor 1 is first removed, and the rod 5 is inserted into the hollow portion 23 of the pipe body 21 of this invention. This rod 5 is a stopper 2 at the lower end of the pipe body 21.
It is inserted into the hollow part 23 of the pipe body 21 from below through the large diameter hollow part 22b and the small diameter hollow part 22a of 2, and then passed through the hollow part of each annular pedestal 25. Then, insert the rod 5 until the upper end of the prismatic part 3 of the screw anchor 1 hits the step of the large diameter hollow part 22b of the stopper 22, and then apply the straight edge 24a of the locking piece 24 to the upper edge 4a of the blade 4. , tighten each butterfly bolt 28 at this position. As a result, the rod 5 of the screw anchor 1 is pushed against the end of each butterfly bolt 28, pressed against one side of the inner circumference of each annular pedestal 25, and held between them, and the screw anchor 1 is shown in FIG. It is fixed to the screwing tool like this.
Then, remove the auger screw (not shown) of the hole-drilling pole-erecting vehicle (not shown), fit the support 29 at the upper end of the pipe body 21 into the rotary drive device 8, and use the mounting hole 30 to pin the pin. Stop at (not shown). As a result, the pipe body 21 together with the screw anchor 1 is fixed to the rotary drive device 8 at the tip of the boom 7 of the digging pole erecting vehicle. Then, the boom 7 is moved to move the screwing tool and the screw anchor 1 onto the ground surface at a desired location, and the rotary drive device 8 is driven.
The screw anchor 1 can be screwed into the soil from the ground surface.

In the above embodiment, the pipe body 21 of the screwing tool
The locking piece 24 is suspended from the stopper 22, and the screw anchor 1 is rotated by locking the locking piece 24 to the blade 4 of the screw anchor 1. However, the present invention is not limited to this. As shown in the figure, attach the lower end of the pipe of the screwing tool 10 to the screw anchor 1.
Even in the case of the screwing tool 10 that rotates the screw anchor 1 by fitting it onto the outer periphery of the prismatic portion 3 of the screw anchor 1, an annular pedestal with a square outer shape is provided inside the prismatic cylindrical pipe, and the rod of the screw anchor can be held by this pedestal. .

(Effects of the invention) This invention has the above-mentioned configuration, and since the screw anchor can be easily fixed to the screwing tool with the tightening bolt, the screwing tool supporting the screw anchor can be attached to the tip of the boom of the drilling pole construction vehicle. Even if the boom is attached to a rotary drive device and moved to any position,
The screw anchor will not come off the screwing tool and fall. Therefore, when moving the screwing tool to any ground surface by moving the boom as in the past, there is no need for the worker to support the screw anchor each time, and the screwing work can be performed easily and quickly. .

[Brief explanation of drawings]

Figure 1 is a partial cross-sectional side view of this device, Figure 2 is an enlarged partial cross-sectional side view of the device with the screw anchor inserted, and Figure 3 is the screw anchor inserted and fixed in the device. A partially sectional side view showing the condition, Figure 4 A is a side view of the screw anchor used in this invention, B is A-A in Figure 4.
FIG. 5 is a partially sectional side view showing a method of screwing in a screw anchor using a conventional screwing tool. In the figure, 1 is the screw anchor, 2 is the core rod,
3 is a prismatic portion, 4 is a blade, 5 is a rod, 21 is a pipe body, 22 is a stopper, 24 is a locking piece, 25
26 is a screw hole, 27 is a hole, and 28 is a butterfly bolt.

Claims (1)

[Scope of utility model registration request] In a screwing tool for inserting a screw anchor rod into a pipe body and locking the screw anchor to the pipe body, an annular pedestal having a hollow portion through which the screw anchor rod passes is fixed in the pipe body. A screw hole passing through one side of the annular pedestal is provided, a hole communicating with the screw hole is bored in one side of the pipe body, and a tightening bolt is screwed into the screw hole through the hole. A screw-in tool for screw anchors.