JP5574351B1 - Pipe insertion tool and pipe insertion method for electric pole hole excavation - Google Patents

Abstract

An electric pole hole excavation pipe insertion tool and a pipe insertion method capable of preventing soil from entering the excavation hole after the electric pole hole is excavated until the electric pole is erected.
An excavating auger 11 has an excavating blade 22 provided in a spiral shape around a rotary shaft 21. The sheath tube 12 is made of paper, has a cylindrical shape, and has an inner diameter into which a portion embedded in the ground of the utility pole can be inserted. The excavation auger 11 is inserted into the sheath pipe 12 so that the distal end 11a of the excavation auger 11 protrudes from the distal end 12a during excavation. A fixing portion 13 is fixed to the rear end portion of the excavating auger 11. A pressing member 14 is disposed along the rear edge of the sheath tube 12. By pushing the holding member 14 with the fixing portion 13 during excavation, the rear end side of the sheath pipe 12 is pushed by the excavation auger 11 so that the sheath pipe 12 can be moved together with the excavation auger 11 toward the distal end side. Yes.
[Selection] Figure 1

Description

  The present invention relates to a utility pole hole excavation pipe insertion tool and a pipe insertion method.

  Conventionally, when an electric pole hole for standing an electric pole is excavated on the ground, there is a risk that the wall surface of the electric pole hole collapses immediately after the excavation and before the electric pole is set in the electric pole hole. Then, the electric pole hole collapse prevention tool which consists of a hollow body which can be expanded and contracted which can prevent collapse of the electric pole hole by putting it in the electric pole hole after excavation and expanding is developed (for example, Patent Document 1).

Utility Model Registration No. 3054108

  However, in the utility pole hole collapse prevention device described in Patent Document 1, after the utility pole hole is excavated until the utility pole hole collapse prevention device is installed, or after the utility pole hole collapse prevention device is removed, the utility pole is set up. There was a problem that the wall surface of the electric pole hole has a risk of collapsing. In particular, in the case of soil that tends to collapse, the wall surface collapses if the wall surface of the utility pole hole is opened even for a short time. Therefore, in order to prevent the collapse of the wall surface of the utility pole hole, it is required not to open the wall surface even for a moment. Moreover, when the wall surface collapses, re-digging with an excavator is required.

  The present invention has been made paying attention to the problem of such an easily eroded utility pole hole, and when excavating a collapsed existing utility pole hole and setting up a new utility pole, the soil is prevented from entering the excavation hole. It is an object of the present invention to provide an electric pole hole excavation pipe insertion tool and a pipe insertion method (electric pole hole excavation apparatus and electric pole hole excavation method).

In order to achieve the above object, an electric pole hole excavating device according to the present invention is an electric pole hole excavating device for excavating an electric pole hole for setting up an electric pole on the ground, and is provided spirally around a rotating shaft. An excavating auger having an excavating blade, a fixed portion fixed to a rear end portion of the excavating auger, a sheath tube having an inner diameter into which a portion embedded in the ground of the utility pole can be inserted, and a rear end of the sheath tube A presser member disposed along an edge of the excavating auger so that the tip of the excavating auger protrudes from the tip when excavating the utility pole hole with the excavating auger. An auger is inserted, the pressing member is pressed by the fixing portion of the excavating auger, and is configured to be movable toward the distal end side together with the excavating auger, and the pressing member is plate-shaped, In the center of the excavating auger A through hole provided so that a rolling shaft can be inserted; and a notch extending from an outer edge to the through hole; expanding the notch and inserting the rotating shaft into the through hole; and a rear end of the sheath tube The fixing portion has a plurality of rollers that rotate along the rotation direction of the rotary shaft on the tip side of the excavating auger, and excavates the electric pole hole with the excavating auger. When the excavating auger rotates, each roller rotates and moves on the surface on the rear end side of the pressing member, and is configured to press the pressing member .

  An electric pole hole excavation method according to the present invention is an electric pole hole excavation method for excavating an electric pole hole for standing an electric pole on the ground using the electric pole hole excavation apparatus according to the present invention, wherein the tip of the Saya tube Excavation of the utility pole hole while pushing the rear end side of the Saya tube with the excavation auger while the excavation auger is inserted into the Saya tube so that the tip of the excavation auger protrudes from The sheath tube is inserted into the utility pole hole.

  The utility pole drilling device and the utility pole drilling method according to the present invention can simultaneously perform excavation of the utility pole hole by the excavating auger and insertion of the sheath pipe into the utility pole hole, so that the collapsed soil is inside the sheath pipe. The utility pole can be excavated without intruding into. In addition, after excavation, the pole can be inserted and stood inside the sheath pipe while the sheath pipe is inserted into the pole pole hole. Thus, the power pole hole excavation apparatus and the power pole hole excavation method according to the present invention can block the soil that has collapsed by the Saya tube until the power pole is set up after the power pole hole is excavated. Re-digging can be eliminated.

  In the utility pole drilling apparatus and utility pole drilling method according to the present invention, the excavation auger may be, for example, an existing earth auger. Moreover, it is preferable that the tip of the sheath tube is sharp so that it can be easily inserted into the excavated utility pole hole. The sheath tube may be made of any material, and may be made of hard paper, for example.

In the utility pole excavation apparatus and utility pole excavation method according to the present invention, when the excavator auger rotates during excavation, the rollers rotate the surface on the rear end side of the presser member, so that the presser member and the sheath pipe do not rotate. Can be. For this reason, even if the sheath tube is made of an inexpensive material such as paper, the sheath tube can be prevented from being damaged, which is economical. In addition, since the notch of the pressing member can be expanded and the rotary shaft of the excavating auger can be taken in and out of the through hole, the pressing member can be easily attached and detached.

  Further, the pressing member is provided on the front end surface so as to protrude toward the inside of the sheath pipe along the inner periphery of the sheath pipe when the opening at the rear end of the sheath pipe is closed. It is preferable to have a protruding portion. In this case, the plurality of protrusions can prevent the shear tube from being greatly displaced in the lateral direction during insertion into the utility pole hole or during excavation. As a result, it is possible to prevent the Saya tube from being damaged by hitting the excavating blade of the excavating auger, or from becoming difficult to insert the Saya tube into the utility pole hole.

  In the electric pole hole excavating device according to the present invention, the excavating auger has protrusions protruding outward from the outer edge of the excavating blade at a plurality of locations on the outer edge of the excavating blade facing the inner surface of the tip side of the sheath pipe. You may have the bracing member which has. In this case, it is possible to prevent the Saya tube from shaking greatly in the lateral direction at the distal end side of the Saya tube at the time of insertion into the utility pole hole or excavation by the bracing member. Accordingly, it is possible to prevent the Saya tube from being damaged by hitting the excavating blade of the excavating auger at the tip end side of the Saya tube, or being difficult to insert the Saya tube into the utility pole hole.

  ADVANTAGE OF THE INVENTION According to this invention, the electric pole hole excavation apparatus and the electric pole hole excavation method which can prevent the penetration | invasion of the soil to an excavation hole after the electric pole hole is excavated until it raises an electric pole can be provided.

It is the front view which saw through the inside of a Saya pipe which shows the electric pole hole excavation device of an embodiment of the invention. It is an enlarged side view of the fixing | fixed part and the pressing member of the utility pole hole excavation apparatus shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a power pole hole excavation apparatus and a power pole hole excavation method (a power pole hole excavation pipe insertion tool and a pipe insertion method) according to an embodiment of the present invention.
As shown in FIGS. 1 and 2, an electric pole hole excavating device 10 is an electric pole hole excavating device 10 for excavating an electric pole hole for standing an electric pole on the ground, and is fixed to an excavation auger 11 and a sheath pipe 12. A portion 13, a pressing member 14, and a suspending means 15 are provided.

  As shown in FIG. 1, the excavation auger 11 is made of an existing earth auger, and includes an excavation blade 22 provided in a spiral shape around the rotary shaft 21, and an expansion / contraction mounting portion that extends the rotary shaft 21 to the rear end side. 23. The telescopic attachment portion 23 has a plurality of adjustment holes 24 along the length direction, and by adjusting the attachment position of the excavation blade 22 with the adjustment holes 24, the position of the excavation blade 22 is set to the front end side or the rear end side. It can be moved. Further, the excavating auger 11 has a plurality of anti-vibration members 25 having protrusions 25 a protruding outward from the outer edge of the excavating blade 22 on the distal end side of the excavating blade 22. In the specific example shown in FIG. 1, the diameter of the excavation blade 22 is 350 mm.

  The sheath tube 12 is made of hard paper and is formed in a cylindrical shape. The sheath tube 12 has a portion embedded in the ground of the utility pole and an inner diameter into which the excavation blade 22 can be inserted. In the sheath tube 12, the excavating auger 11 is inserted so that the distal end 11a of the excavating auger 11 protrudes from the distal end member 12a. The sheath tube 12 has a pointed tip 12a so that it can be easily inserted into the excavated utility pole hole. Further, the sheath tube 12 has a pair of insertion holes 12b provided through the thickness at positions opposed to the upper end portion.

  As shown in FIGS. 1 and 2, the fixing portion 13 is fixed to the rear end side of the excavating blade 22 of the excavating auger 11. The fixing portion 13 is fixed to the excavation auger 11 using the adjustment hole 24 of the telescopic attachment portion 23. The fixed portion 13 has a plurality of rollers 26 that rotate along the rotation direction of the rotation shaft 21 on the distal end side.

  The pressing member 14 is made of steel and has a disk shape, and is arranged so as to close the opening 12 c at the rear end of the sheath tube 12. The holding member 14 has a through-hole 27 provided in the center portion so that the rotating shaft 21 of the excavating auger 11 can be inserted, and a notch (not shown) extending from the outer edge to the through-hole 27. The pressing member 14 is provided so as to widen the cut and insert the rotating shaft 21 into the through hole 27 to close the opening 12 c at the rear end of the sheath tube 12. Further, the pressing member 14 is provided on the front surface side so as to protrude toward the inside of the sheath tube 12 along the inner periphery of the sheath tube 12 when the rear end opening 12c of the sheath tube 12 is closed. A plurality of protrusions 28 are provided.

  As shown in FIG. 1 and FIG. 2, in the utility pole excavation device 10, when the pressing member 14 closes the opening 12 c at the rear end of the sheath pipe 12, each roller 26 of the fixing portion 13 is moved to the rear end side of the pressing member 14. It arrange | positions so that the surface of may be touched. Further, at this time, the protrusions 25 a of the anti-vibration members 25 of the excavation auger 11 are opposed to the inner surface of the front side of the sheath tube 12. The utility pole hole excavator 10 is configured such that each roller 26 rotates and moves on the surface of the rear end side of the pressing member 14 and pushes the pressing member 14 by the rotation of the excavating auger 11. Further, the sheath tube 12 is pushed by the excavation auger 11 via the holding member 14 on the rear end side, and is movable toward the distal end side together with the excavation auger 11.

  As shown in FIG. 1, the suspending means 15 is suspended by being hooked on a pair of engaging portions 29 attached to the upper portion of the fixed portion 13 and extending to the left and right from the rotating shaft 21. The pair of belt members 30 and a hook 31 provided at the tip of each belt member 30 are provided. The suspension means 15 can suspend the sheath tube 12 and the holding member 14 by hooking the hook 31 into each insertion hole 12 b of the sheath tube 12.

  The utility pole hole excavation method of the embodiment of the present invention is suitably implemented using the utility pole hole excavation apparatus 10. In the utility pole hole excavation method according to the embodiment of the present invention, first, the position of the excavation blade 22 of the excavation auger 11 is moved to the tip side using the adjustment hole 24. The fixing portion 13 is attached to the excavation auger 11 using the adjustment hole 24 of the telescopic attachment portion 23. The notch is opened, the rotary shaft 21 is inserted into the through hole 27, and the pressing member 14 is attached to the distal end side of the fixing portion 13. The drill pipe auger 11 is inserted through the opening 12c at the rear end of the sheath pipe 12 with the tip member 12a facing down and the sheath pipe 12 standing upright. The sheath tube 12 is lifted until it hits the pressing member 14, and the sheath tube 12 and the retaining member 14 are suspended by the suspending means 15. As a result, the tip of the excavating auger 11 protrudes from the tip of the sheath tube 12.

  The excavator auger 11 is inserted inside the sheath tube 12 and the sheath tube 12 is suspended, and then moved to the excavation position of the utility pole hole. After the suspension means 15 is removed, the utility pole hole is excavated. Thus, excavation of the utility pole hole and insertion of the sheath pipe 12 into the utility pole hole can be performed while pushing the rear end side of the sheath pipe 12 through the fixing portion 13 and the holding member 14 by the excavation auger 11. it can.

  The utility pole drilling device 10 and the utility pole drilling method according to the embodiment of the present invention can simultaneously perform excavation of the utility pole hole by the excavator auger 11 and the insertion of the sheath tube 12 into the utility pole hole. The utility pole hole can be excavated without the soil entering the inside of the sheath pipe 12. Further, after excavation, the utility pole can be inserted into the interior of the sheath pipe 12 while the sheath pipe 12 is inserted into the utility pole hole. As described above, the utility pole drilling apparatus 10 and the utility pole drilling method according to the embodiment of the present invention can block the soil that has collapsed by the Saya tube 12 until the utility pole is erected after the utility pole drilling. It is possible to eliminate the need to re-dig the electric pole hole.

  In the utility pole drilling device 10 and the utility pole drilling method according to the embodiment of the present invention, when the excavating auger 11 rotates during excavation, each roller 26 rotates the surface on the rear end side of the presser member 14. 14 and the sheath tube 12 do not rotate. For this reason, even if the Saya tube 12 is made of inexpensive paper, the Saya tube 12 can be prevented from being damaged, which is economical.

  In the utility pole drilling apparatus 10 and the utility pole drilling method according to the embodiment of the present invention, the plurality of protrusions 28 of the holding member 14 cause the shear pipe 12 to be greatly displaced in the lateral direction during insertion into the utility pole hole or during excavation. Can be prevented. Further, the swaying member 25 of the excavating auger 11 can prevent the Saya tube 12 from shaking greatly in the lateral direction at the distal end side of the Saya tube 12 during insertion into the utility pole hole or during excavation. Thereby, it can prevent that the Saya tube 12 hits the excavation blade 22 of the excavation auger 11, and it becomes difficult to insert the Saya tube 12 into a utility pole hole.

  Since the utility pole hole excavating apparatus 10 and the utility pole hole excavation method according to the embodiment of the present invention can widen the incision of the presser member 14 and put the rotary shaft 21 of the excavator auger 11 in and out of the through hole 27, the presser member 14 is easy to attach and detach. Moreover, the power pole hole excavation apparatus 10 and the power pole hole excavation method according to the embodiment of the present invention are not only used for excavating a broken existing power pole hole again and setting up a new power pole, but also newly creating a power pole hole for soft ground. It can also be used when excavating.

  Note that the utility pole drilling device 10 and the utility pole drilling method according to the embodiment of the present invention may not have the suspension means 15. In this case, the electric pole hole can be excavated at a desired excavation position by inserting the excavation auger 11 into the sheath pipe 12 in a state where the sheath pipe 12 is set up at the position for excavating the electric pole hole.

DESCRIPTION OF SYMBOLS 10 Electric pole hole excavation device 11 Excavator for excavation 21 Rotating shaft 22 Excavation blade 23 Telescopic attachment part 24 Adjustment hole 25 Anti-rest member 25a Protrusion 12 Saya tube 12a Tip member 12b Insertion hole 13 Fixing part 26 Roller 14 Holding member 27 Through-hole 28 Protrusion Part 15 Suspension means 29 Engagement part 30 Belt member 31 Hook

Claims (4)

An electric pole hole excavating pipe insertion tool for excavating an electric pole hole for standing an electric pole on the ground,
An auger for excavation having an excavation blade provided in a spiral around the rotation axis;
A fixed portion fixed to a rear end portion of the excavation auger;
A sheath tube having an inner diameter into which a portion embedded in the ground of the utility pole can be inserted ;
A pressing member disposed along the rear edge of the sheath tube,
When the utility pipe hole is excavated by the excavating auger, the excavating auger is inserted into the sheath pipe so that the distal end of the excavating auger protrudes from the distal end, and the holding member is connected to the excavating auger . It is configured to be pushed toward the tip side with the excavating auger by being pushed by the fixing portion ,
The pressing member is plate-shaped, and has a through hole provided in a central portion so that the rotating shaft of the excavating auger can be inserted, and a cut extending from an outer edge to the through hole. Expanding and inserting the rotary shaft into the through hole, provided to close the opening at the rear end of the sheath tube,
The fixing portion has a plurality of rollers that rotate along a rotation direction of the rotation shaft on a distal end side of the excavation auger, and the excavation auger rotates when the electric pole hole is excavated by the excavation auger. Accordingly, each of the rollers rotates and moves on the surface on the rear end side of the presser member, and is configured to press the presser member . The pressing member has a plurality of protrusions provided to protrude toward the inside of the sheath pipe along the inner periphery of the sheath pipe when the opening of the rear end of the sheath pipe is closed on the front surface side. The utility pole hole excavation pipe insertion tool according to claim 1 , further comprising a portion. The excavation auger has a bracing member having protrusions protruding outward from the outer edge of the excavation blade at a plurality of locations on the outer edge of the excavation blade facing the inner surface of the tip side of the sheath pipe. The utility pole hole excavation pipe insertion tool according to claim 1 or 2 . A pipe insertion method for excavating an electric pole hole for standing an electric pole on the ground using the electric pole hole excavation pipe insertion tool according to any one of claims 1 to 3 ,
While pushing the rear end side of the Saya tube with the excavating auger, the utility pole while the excavating auger is inserted into the Saya tube so that the distal end of the excavating auger protrudes from the distal end of the Saya pipe A pipe insertion method characterized by excavating a hole and inserting the sheath pipe into the utility pole hole.

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