JPH0410275Y2 - - 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. 6, 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). Rectangular tubular screw tool 10
Fix the upper end, insert the rod 5 from which the thimble 6 of the screw anchor 1 has been removed into the screwing tool 10, and insert the screwing tool 1 around the outer periphery of the prismatic portion 3 of the core rod 2.
0, operate the rotary drive device 8 of the digging pole construction vehicle to rotate the screwing tool 10 and the screw anchor 1, and screw the screw anchor 1 into the soil from the desired ground surface. There is.

(Problem to be solved by the invention) However, this screw anchor 1 is available in various sizes depending on the required tension of the branch line, and the conventional screwing tool 10 is In order to fit into the prismatic portion 3 of the screw anchor 1, screwing tools of various sizes must be prepared depending on the size of the screw anchor. Therefore, depending on the size of the screw anchor, it is necessary to attach and detach the screwing tool to the excavation pole erecting vehicle, making the work complicated.

(Means for solving the problem) Therefore, this invention has a structure in which the locking to the screw anchor is performed by a locking piece that can freely come into contact with one end of the blade, and can be used for screw anchors of various sizes. The present invention aims to solve the above problems by providing a versatile screwing tool.

The specific structure of this invention is to insert the rod of the screw anchor into the hollow part of the pipe body, and to apply the upper end of the core rod provided at the lower end of the rod to the lower end of the pipe body. A locking piece that comes into contact with the upper edge of a spiral blade provided on the outer periphery of this core rod is suspended and fixed.

(Function) As mentioned above, when the rod of the screw anchor is inserted into the pipe body of this invention and the lower end of the pipe body is brought into contact with the upper end of the core rod of the screw anchor, the locking piece engages the blade of the screw anchor. When the screwing tool is rotated in this state, the screw anchor is pushed by the locking piece and rotates together with the screwing tool. Moreover, the downward pressure of the pipe body is received by the upper end of the core rod of the screw anchor. Therefore, when the tip of the screw anchor's core rod is pushed into the ground from the ground surface and rotates together with the screwing tool as described above, it is rotated and propelled by the spiral blades, and the screw anchor is pushed deep into the soil. Buried.

(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 22a having an inner diameter smaller than the inner diameter of this hollow part 23.
Continuing from this small-diameter hollow part 22a, there is a large-diameter hollow part 22b having approximately the same diameter as the inner diameter of the pipe main body 21 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.
The screw anchor 1 is inserted from below through the large diameter hollow part 22b and the small diameter hollow part 22a of the screw anchor 1, and the upper end of the prismatic part 3 of the screw anchor 1 is inserted into the large diameter hollow part 2 of the stopper 22.
Insert until it hits the step part 2b. Furthermore, the straight edge 24a of the locking piece 24 is applied 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 pressed against one side of the inner circumference of each annular pedestal 25, and the pipe body 2
Fixed to 1. 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. When this rotary drive device 8 is driven, the pipe body 21 and the screw anchor 1 rotate as one, and the screw anchor 1 is attached to the ground surface at a desired location.
can be inserted. At this time, the pipe main body 21 is directly fixed to the rotary drive device 8 of the drilling pole erecting vehicle, and the locking piece 24 of the stopper 22 at the lower end of the pipe main body 21 is attached to the upper edge 4a of the blade 4 of the screw anchor 1. Since the screw anchor 1 comes into contact with the pipe body 21 and presses it, the screw anchor 1 rotates together with the pipe body 21.

FIG. 4 shows, instead of the above embodiment, the locking piece 24 is extended so as to come into contact with the lower edge 4b of the blade 4 of the screw anchor 1, and the locking piece 24 is attached to the lower edge 4b of the blade 4. A notch 31 is provided for insertion. In this embodiment, since the locking piece 24 contacts and locks both the upper edge 4a and the lower edge 4b of the blade 4, the rotation of the pipe body 21 can also be reversed.

In the above embodiment, the large diameter hollow part 22b of the stopper 22 is located at the upper end of the core rod 2 of the screw anchor 1.
Although the configuration is such that the stepped portion is pressed, the configuration is not limited to this, and the configuration may be such that the lower end of the pipe body 1 is pressed directly, or the lower end of the pipe body 1 is pressed via an appropriate object. Further, the structure of the locking piece 24 is such that it has a straight edge 24a on one side and an inclined edge 24a on the other side.
4 is for reinforcing the locking piece 24 itself, and may have any other suitable shape.

(Effect of the invention) This invention has the above-mentioned structure, and if the rod of the screw anchor fits inside the hollow part of the pipe body and presses the core rod of the screw anchor at the lower end of the pipe body, it can be used with a large diameter. It is a highly versatile screwing tool that can screw in various screw anchors, even those with small diameters. Therefore, there is no need to prepare various screwing tools depending on the size of the screw anchor as in the past, and the screw anchor can be installed only once on the top-drilling pole construction vehicle, making screwing the screw anchor extremely easy. This makes it easier to work with.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of this device, Fig. 2 is a side view of the main part of this device in use, Fig. 3 is an enlarged partial sectional view of Fig. 2, and Fig. 4 is another example of this device. 5A is a side view of the screw anchor used in this invention, B is a sectional view taken along line A-A in FIG. FIG. 3 is a partially sectional side view showing a supported state of the anchor. In the figure, 1 is the screw anchor, 2 is the core rod,
4 is the blade, 5 is the rod, 21 is the pipe body, 22
23 is a hollow portion, and 24 is a locking piece.

Claims (1)

[Scope of utility model registration request] When the rod of the screw anchor is inserted into the hollow part of the pipe body at the lower end of the pipe body, and the upper end of the core rod provided at the lower end of this rod is brought into contact with the lower end of the pipe body, the outer periphery of this core rod A threading tool for a screw anchor, characterized in that a locking piece that abuts the upper edge of a spiral blade provided on the screw anchor is suspended and fixed.