JP2005016042A - Branch line anchor for pole and underground method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground method for a branch line anchor for a pole, reducing the work time, reducing the work labor, dispensing with expensive special device and boring machine, and facilitating implementation. <P>SOLUTION: This underground method of a branch line anchor for fixing the branch line supporting the pole to the ground surface includes: a process of providing a test excavated hole 11 for investigating a buried structure prior to the installation of the pole in an underground scheduled portion of the branch line anchor; a process of inserting a branch line anchor A having at least a peak-like resistance plate 2 in the test excavated hole; a process of making the resistance plate of the branch line anchor sunk into the inner wall surface of the testing excavated hole; and a process of performing back filling of earth to the test excavated hole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a utility pole branch anchor for fixing a utility line supporting a utility pole to the ground and a method of embedding the same.
[0002]
[Prior art]
Conventionally, as this kind of utility pole branch anchor, for example, as disclosed in Patent Document 1, a lower end of the resistor plate is formed in a pointed shape, and one end of the resistor plate is pivotally connected to the upper end portion of the resistor plate. In many cases, the guide plate is composed of a guide plate and a stabilizer plate slidably mounted on the outer periphery from the other end (free end) side of the guide plate. And when burying this branch line anchor in the ground, first, the lower end side of the resistance plate is stabbed into the ground, and the upper end portion of the resistance plate is driven using a driving rod or the like, so that the resistance plate and the guide plate are connected to the guide plate. Embed in the ground leaving only the free end on the ground. Subsequently, after one end of the stabilizing plate is mounted on the free end side of the guide plate, the other end of the stabilizing plate is driven with a driving rod or the like so as to be buried deep in the ground along the guide plate.
[0003]
Further, as another method of burying a branch pole anchor for a utility pole, for example, as disclosed in Patent Document 2, a hole is dug deep in the ground, and after inserting a branch line anchor into the hole, soil is buried in the hole. Things to do are also known.
[0004]
[Patent Document 1]
JP-A-10-195871 (page 3-4, FIGS. 7-10)
[Patent Document 2]
Japanese Patent Laid-Open No. 11-6148 (page 2-4, FIGS. 4 and 6)
[0005]
[Problems to be solved by the invention]
However, among the above conventional methods, the former burying method has a problem that it takes a lot of time and labor to drive the resistance plate of the branch line anchor deep into the ground. In addition, in Patent Document 1, a dedicated pile driving device has been proposed to solve this problem, but this type of dedicated device is costly and cannot be easily implemented. There is.
[0006]
Further, in the latter burying method, the burial hole must be made by hand digging in a place where a digging machine or the like cannot be used, and there is a problem that it takes much time and labor like the former one.
[0007]
The present invention has been made in view of such various points, and the first problem is that, in particular, prior to the installation of the utility pole, a hand drilling is performed near the planned installation location of the utility pole for the investigation of the buried object. At the same time, it is possible to reduce the work time and labor by using the test hole as an embedding hole for the utility pole branch line anchor. It is an object of the present invention to provide a method for burying utility pole anchors that can be easily implemented without requiring a digging machine.
[0008]
Moreover, the 2nd subject of this invention is providing the branch line anchor for utility poles suitable for utilizing the test hole mentioned above as a burial hole in implementing this burial method.
[0009]
[Means for Solving the Problems]
In order to solve the first problem, the invention according to claim 1 is a method for burying a branch line anchor for fixing a branch line supporting a power pole to the ground. A step of providing a hole at a planned location of the branch anchor, a step of inserting a branch anchor having at least a pointed resistance plate into the test hole, and a biting of the resistance plate of the branch anchor into the inner wall of the test hole It is set as the structure provided with a process and the process of refilling soil in the said test hole.
[0010]
In this configuration, because the drilling holes to be dug for investigating the buried objects prior to the installation of the utility poles are set at the planned locations of the branch anchors, the branch anchors are used as before when the branch anchors are buried. It is possible to embed by inserting a branch anchor into the trial hole without providing a special burial hole. Moreover, since the branch anchor is embedded with a pointed resistance plate biting into the inner wall surface of the test hole, the pullout strength of the branch anchor is ensured to be high even when the depth of the test hole is not sufficient. become.
[0011]
The invention according to claim 2 is the method of embedment of the utility pole branch anchor according to claim 1, in particular, in the step of biting the resistance plate of the branch anchor into the inner wall surface of the test hole, a cylinder driven by a manual pump is provided. It fixes to a holding metal fitting, hold | maintains this holding metal fitting on the ground, inserts a cylinder in a borehole, presses a branch anchor with a cylinder, and makes it a structure which bites a resistance board into the inner wall face of a borehole. In this configuration, the workers hold the metal fittings on the ground and bring the cylinder into contact with the branch anchor, while the cylinder is driven to extend by a manual pump, so that the resistance plate of the branch anchor is tested by the cylinder pressing force. It can deeply and securely bite into the inner wall surface of the hole.
[0012]
Further, in order to solve the second problem, the invention according to claim 3 is a pair of leg members whose upper ends are rotatably connected via a fastening member as branch pole anchors for utility poles, and each leg. A resistance plate fixed to the lower end of each member and formed in a pointed outward shape, a reinforcing plate fixed to the joint between the resistance plate and the leg member, and one end pivotable to one leg member And a stopper member having an engaging portion that is engageable with the reinforcing plate on the other leg member side at the other end.
[0013]
In this configuration, when inserting the branch anchor into the test hole, the pair of leg members are inserted with their lower ends closed, and the leg members are opened using a cylinder or the like driven by a manual pump. Each of the resistance plates at the lower end of the member is made to bite into the inner wall surface of the test hole. After that, the stopper member is rotated around the connecting portion with one leg member, and the engaging portion is engaged with the reinforcing plate on the other leg member side. The state in which the plate bites into the inner wall surface of the test hole is held by the stopper member. If the soil is backfilled in the test hole in this state, the pullout strength of the branch anchor is permanently secured.
[0014]
According to a fourth aspect of the present invention, in the branch pole anchor for a utility pole according to the third aspect, the resistor plate is bent upward in a V shape or curved in an arc shape at the center line thereof, and substantially on the center line of the resistor plate. The lower end of the leg member is fixed substantially vertically, and the reinforcing plate is fixed to the resistance plate and the leg member while being orthogonal to the center line of the resistance plate and in contact with the end surface of the leg member. In this configuration, the resistance plate can be effectively increased in rigidity by the bending or bending structure of the resistance plate and the joining structure of the leg member and the reinforcing plate, and the leg members can be connected to each other using a cylinder driven by a manual pump. When the legs are opened, the reinforcing plate can be used as a pressing surface of the cylinder.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show a utility pole branch anchor A according to an embodiment of the present invention. The branch anchor A is fixed to a pair of leg members 1, 1 and the lower ends of the leg members 1, respectively. In order to maintain the open leg state between the two resistance plates 2 and 2, the two reinforcing plates 3 and 3 fixed to the joints between the resistance plates 2 and the leg member 1, and the leg members 1 and 1, respectively. The two stopper members 4 and 4 are provided.
[0016]
As shown in FIG. 3, each of the leg members 1 has a flat plate shape, and a bolt 7 as a fastening member is inserted into a bolt hole 6 formed at an upper end portion thereof to form a pair of leg members 1, 1. The upper ends are coupled so as to be rotatable. Each of the resistance plates 2 is formed in an outwardly-pointed shape that is the opening direction of the leg members 1 and 1 in plan view, and has a V-shape with a large opening upward at the center line. It is bent. And the lower end of the leg member 1 is being fixed to the substantially center line of this resistance board 2 by welding substantially perpendicularly.
[0017]
Each of the reinforcing plates 3 has a substantially rhombus shape, and is fixed to the resistance plate 2 and the leg member 1 by welding while being orthogonal to the center line of the resistance plate 2 and in contact with the inner end surface of the leg member 1. ing. Each stopper member 4 is made of an angle material, and one end of each stopper member 4 is rotatably connected to a lower portion of one of the pair of leg members 1 and 1 through a bolt 8. In addition, an engaging portion 9 that can be engaged with the reinforcing plate 3 on the other leg member 1 side is formed at the other end portion of each stopper member 4 by notching from the end surface.
[0018]
Although not shown, one end of the branch line rod is coupled to the bolt 7 on the upper end side of the leg member 1, and the ground side end portion of the branch line supporting the utility pole is connected to the other end of the branch bar. ing.
[0019]
Next, a method for embedding the branch anchor A will be described with reference to FIGS. Prior to the installation of the utility pole, it is common to provide a test hole 11 having a diameter of about 700 mm and a depth of about 1000 mm near the planned installation location of the utility pole for investigation of the buried object. As a point, this test hole 11 is provided in the planned location of the branch anchor. Note that the planned location of the branch anchor is determined based on the planned installation location of the utility pole and the planned overhead state of the utility pole.
[0020]
Then, after installing the utility pole, the pair of leg members 1 and 1 of the branch anchor A are brought into a closed leg state in which the resistance plates 2 and 2 on the lower end side are in contact with each other on the inside, and at the lower part of each leg member 1 The connected stopper members 4 are superposed on the leg members 1, respectively, and the branch anchor A is inserted into the test hole 11 in this state, and the resistance plate 2 is placed at the bottom of the test hole 11 (see FIG. 4 (a)).
[0021]
Subsequently, each resistance plate 2 of the branch anchor A is bitten into the inner wall surface of the test hole 11 by using a hydraulic cylinder 12 driven by a manual pump (not shown) (see FIGS. 4B and 4C). ). The manual pump and the hydraulic cylinder 12 are general-purpose ones used for jacks and the like. In this embodiment, as shown in detail in FIG. 6, the hydraulic cylinder 12 is a double-acting type in which two hydraulic hoses 13, 13 communicated with a manual pump are connected to a cylinder body 12a. A pressing member 14 is attached to the tip of the piston rod 12b extending from one end of the cylinder body 12a, and a screw hole 15 is provided in the other end of the cylinder body 12a. Sixteen threaded portions 16a are screwed together. Then, a T-shaped holding bracket 17 as shown in FIG. 7 is prepared, and the hydraulic cylinder 12 is fixed to a fixing portion 17a provided at the tip of the holding bracket 17, and then the holding portion 17b of the holding bracket 17 on the ground. The hydraulic cylinder 12 is inserted into the test hole 11 while the pressure member 14 and the spacer 16 are arranged between the two reinforcing plates 3 and 3 of the branch anchor A. In this state, the hydraulic cylinder 12 is extended and driven by a manual pump to open the pair of leg members 1 and 1 via the reinforcing plate 3, so that the resistance plate 2 at the lower end of each leg member 1 is placed in the test hole 11. It begins to bite into the wall. A plurality of types of spacers 16 having different lengths are prepared, and the spacers 16 are successively longer in length as the distance between the two reinforcing plates 3, 3, that is, the leg opening angle of the leg members 1, 1 increases. 16 is attached to the hydraulic cylinder 12 for use.
[0022]
After each resistance plate 2 of the branch anchor A has digged deeply into the inner wall surface of the test hole 11 by such a procedure, the stopper member 4 superimposed on each leg member 1 is tilted around the bolt 8 that is the fulcrum. And the engaging portion 9 of the stopper member 4 is engaged with the reinforcing plate 3 on the other leg member 1 side, thereby maintaining the open leg state between the leg members 1 and 1 (FIG. 5A). reference). Thereafter, the soil is backfilled in the test hole 11 (see FIG. 5B). Thus, the burying of the branch line anchor A is completed.
[0023]
According to such a method of burying the branch line anchor A, since the test hole 11 to be dug by hand for the investigation of the buried object is set at the planned burial site of the branch line anchor A before the installation of the utility pole, the branch line At the time of burying the anchor A, the branch line anchor A can be inserted and buried in the test hole 11 without specially providing a burial hole for the branch line anchor as in the prior art. As a result, the working time can be shortened and the work labor can be reduced, and an expensive dedicated device or a digging machine is not required, and the implementation can be facilitated.
[0024]
Moreover, the branch anchor A has a pair of leg members 1 and 1 whose upper ends are rotatably connected via bolts 7 and two pointed shapes fixed to the lower ends of the both leg members 1 and 1, respectively. Resistance plates 2, 2, and the pair of leg members 1, 1 are opened and the resistance plates 2, 2 are embedded in the inner wall surface of the test hole 11. Even when the depth is not sufficient, the pull-out strength of the branch anchor A can be secured high. Further, even when the size and shape of the test hole 11 are different, when the branch line anchor A is inserted into the test hole 11, it can be dealt with by simply changing the leg angle of the leg members 1 and 1, and widely used. Can do. In addition, since the leg members 1 and 1 in the open leg state, that is, the state in which the resistance plate 2 bites into the inner wall surface of the test hole 11 is retained by the pair of stopper members 4 and 4 even after being buried, The pullout strength can be secured permanently high.
[0025]
Further, when the two resistance plates 2 and 2 of the branch anchor A are caused to bite into the inner wall surface of the test hole 11, the operators fix the hydraulic cylinder 12 driven by the manual pump to the fixing portion 17 a of the holding bracket 17. The hydraulic cylinder 12 is inserted into the test hole 11 while holding the holding portion 17b of the holding metal 17 on the ground, and the resistance plate 3 of the branch anchor A is pressed by the hydraulic cylinder 12 so that each resistance plate 2 is inserted into the test hole. 11 can be deeply and surely bitten into the inner wall surface, so that the pull-out strength of the branch line anchor A can be further increased while reducing work labor and the like.
[0026]
In addition, each of the resistance plates 2 is bent upward in a V shape at the center line thereof, and the lower end of the leg member 1 is fixed substantially vertically on the center line of the resistance plate 2, and the resistance plate 2 Since the reinforcing plate 3 is fixed to the resistance plate 2 and the leg member 1 while being in contact with the end surface of the leg member 1 and orthogonal to the center line of the leg member 1, the bending structure of each resistance plate 2 and the leg member 1 and the reinforcing plate In addition to effectively increasing the rigidity of each resistance plate 2 by the joining structure with 3, the reinforcing plate 3 is pressed against the pressing surface of the hydraulic cylinder 12 when the leg members 1, 1 are opened using the hydraulic cylinder 12. Can be used as
[0027]
In addition, this invention is not limited to the said embodiment, Other various embodiment is included. For example, in order to bite the resistance plate 2 of the branch anchor A into the inner wall surface of the test hole 11, a hydraulic cylinder 12 driven by a manual pump is fixed to the holding metal 17, and the holding metal 17 is held on the ground to hold the hydraulic cylinder. The cylinder 12 is inserted into the test hole 11, and the reinforcing plate 3 of the branch line anchor A is pressed by the hydraulic cylinder 12 to cause the resistance plate 2 to bite into the inner wall surface of the test hole 11. Instead of the hydraulic cylinder 12 and the holding metal 17, the pair of leg members 1, 1 of the branch anchor A inserted into the test hole 11 are opened by a manual mechanism, and the resistance plate 2 is attached to the inner wall surface of the test hole 11. You may make it bite.
[0028]
Further, the configuration of the branch anchor A is not limited to the above-described embodiment, and various types may be adopted. For example, the leg member 1 and the resistance plate 2 may be integrally formed, The shape may be curved upward in an arc shape.
[0029]
【The invention's effect】
As described above, according to the method of embedding a branch pole anchor for a utility pole in the present invention, a branch anchor can be used as in a conventional manner during burial work by using a test hole drilled for investigating a buried object as a buried hole of the branch anchor. It is not necessary to dig a buried hole, so that the working time can be shortened and the work labor can be reduced, and an expensive dedicated device or a digging machine is not required, so that the implementation can be facilitated. . Moreover, since the branch anchor is embedded with the pointed resistance plate biting into the inner wall surface of the test hole, it is possible to ensure high pull-out strength of the branch anchor even if the depth of the test hole is not sufficient. It is possible to produce an effect excellent in practicality.
[0030]
In particular, in the invention according to claim 2, the workers hold the holding metal fitting on the ground and bring the cylinder into contact with the branch anchor, while the cylinder is driven to extend by a manual pump, and the branch anchor is driven by the pressing force of the cylinder. Since the resistance plate can be deeply and surely bite into the inner wall surface of the trial hole, the working time can be further shortened and the work labor can be further reduced.
[0031]
In addition, according to the utility pole branch anchor of the present invention, even if the size and shape of the test hole are different, it can be handled by changing the leg angle of the pair of leg members inserted into the test hole. It has an excellent effect. In addition, when the leg member is in the open state, that is, when the resistance plate at the lower end of each leg member bites into the inner wall of the test hole, it is held back by the stopper member, so the pullout strength of the branch anchor is permanently secured. can do.
[0032]
In particular, in the invention according to claim 4, the resistance plate can be effectively increased in rigidity by the bending or bending structure of the resistance plate and the joining structure of the leg member and the reinforcing plate. Can be increased. In addition, the reinforcing plate can be used as a pressing surface of the cylinder.
[Brief description of the drawings]
FIG. 1 is a front view of a utility pole branch line anchor according to an embodiment of the present invention in an open leg state.
FIG. 2 is a plan view of the same.
FIG. 3 shows one leg member side of the branch anchor, wherein (a) is a front view and (b) is a right side view.
FIG. 4 is a process diagram showing a first half of an operation process for explaining a method of burying the branch line anchor.
FIG. 5 is a process diagram showing the latter half part in the same manner.
FIG. 6 is a perspective view of a hydraulic cylinder and a spacer used for embedding a branch anchor.
FIGS. 7A and 7B show a holding metal fitting used for embedding a branch anchor, wherein FIG. 7A is a front view and FIG. 7B is a side view.
[Explanation of symbols]
A Telephone branch anchor 1 Leg member 2 Resistance plate 3 Reinforcement plate 4 Stopper member 7 Bolt (fastening member)
9 Engagement portion 11 Test hole 12 Hydraulic cylinder 17 Holding bracket

Claims (4)

A method of embedding a branch line anchor for fixing a branch line supporting a power pole to the ground,
Prior to the installation of the utility pole, a process of providing a test hole for investigating the buried object at a planned location of the branch anchor,
Inserting a branch anchor having at least a pointed resistance plate in the test hole;
A process of causing the resistance plate of the branch anchor to bite into the inner wall surface of the test hole;
A method for burying a branch anchor for a utility pole, comprising: a step of backfilling soil in the trial hole. In the process of biting the resistance plate of the branch anchor into the inner wall surface of the test hole, the cylinder driven by the manual pump is fixed to the holding metal, the cylinder is inserted into the test hole while holding the holding metal on the ground, The method of embedding a branch anchor for a utility pole according to claim 1, wherein the branch anchor is pressed into the inner wall surface of the test hole by pressing the branch anchor with a cylinder. A pair of leg members whose upper ends are connected to each other via a fastening member, a resistance plate fixed to the lower end of each leg member and formed outwardly in a pointed shape, and the resistance plate A reinforcing plate fixed to the joint portion with the leg member, and an engaging portion that is rotatably connected to one leg member at one end and engageable with the reinforcing plate on the other leg member side are formed at the other end. A branch anchor for a utility pole, comprising a stopper member. The resistance plate is bent upward in a V shape at its center line or curved in an arc shape, and the lower end of the leg member is fixed substantially vertically on the approximate center line of the resistance plate, 4. The utility pole branch anchor according to claim 3, wherein the reinforcing plate is fixed to the resistance plate and the leg member in a state of being orthogonal to the center line of the resistance plate and in contact with the end surface of the leg member.

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