JP5067732B2 - Branch line anchor and its drawing method - Google Patents

Description

The present invention relates to a branch anchor that shares the installation tension of an electric pole, a telegraph pole, and the like, and that prevents the electric pole and the telegraph pole from tilting or collapsing, and a method for extracting the branch anchor. .

As a driving-type branch line anchor using a small vibration driving machine or the like, there is, for example, Japanese Utility Model Publication No. 06-79830 (Patent Document 1).
The branch anchor proposed in this Patent Document 1 is driven by connecting a widening guide edge formed at the lower ends of a pair of struts to a widening guide edge formed at the upper edge of both sides of the arrowhead-shaped substrate. It comprises a member and a resistance plate in which the upper part of the two dividing plates is fixed and the lower part is releasably coupled, and the resistance plate is positioned at a right angle to the substrate, and with respect to the support In the anchor slidably fitted, an expanding guide portion formed at the lower end of the support is fixed to the upper end of a connecting plate having the lower portion movably coupled to the substrate.

As shown in FIG. 2 of Patent Document 1, the driving member (also referred to as the anchor main body) in this branch anchor has a frontal shape with an arrowhead shape, and the lower end of a driving rod (not shown) engages with the center of the upper end. A concave portion is formed, and a substrate is formed with symmetrically widened guide edges on the left and right of the upper end surface, and a support connected to the upper portion of the substrate.
Each of the pair of supports is formed at its lower end with an expansion guide portion connected to the base portion of the expansion guide edge of the substrate, and the lower surface portion of the expansion guide portion is attached to the substrate. On the other hand, the lower part is fixed to the upper end of the connecting plate that is loosely coupled.

On the other hand, as shown in FIGS. 6 to 8 of Patent Document 1, the resistance plate is fixed to the upper part of the two dividing plates, and the lower part is detachably temporarily joined, and the support is fitted. And it is comprised by what provided the ditch | groove fitted to the expansion guide edge of a board | substrate.
In addition, Japanese Utility Model Publication Nos. 49-5847, 49-5847, 49-5849, 49-5850, 49-5851 disclose branch anchors having the same form. Has been.

In this type of branch anchor, a pilot hole is drilled in the ground surface in which the branch anchor is embedded, and a small vibration driving machine or a driving rod is used to drive the substrate to a predetermined depth. The resistance plate is driven with a driving rod using the scissors as a guide.
When the dividing plate constituting the driven resistance plate reaches the expansion guide portion at the lower end of the support, the temporary connection is released, and then the distribution plate is expanded along the expansion guide portion of the substrate, It is buried in the position of.
After that, after attaching a branch line rod for connecting the base end portion of the branch line supporting the utility pole through the connecting member to the upper end of the support rod, the excavated pilot hole is backfilled. (See FIG. 1 of Patent Document 1)

The branch anchors thus buried need to be removed by removing the branch anchors from the ground when the utility poles are removed, for example, when they are replaced or when aerial distribution lines are abolished.
Japanese Utility Model Publication No. 06-79830 (Utility Model Registration Request, FIGS. 1 to 8)

  In this branch anchor removal operation, since the tip of the branch bar is exposed on the ground surface, a connecting plate for holding the support bar on the branch by digging up with a scoop or the like in the direction in which the branch bar extends from the periphery. After removal, the tip of the support can be removed by pulling upward.

  However, since the resistance plate is mounted in an expanded state along the upper edge portion of the substrate connected to the tip end portion of the support rod, the branch line anchor is greatly affected by the resistance force of the resistance plate at the time of drawing. However, since it cannot be pulled out easily, it is necessary to use a powerful machine such as a crane.

  Also, in places where mechanical force such as cranes cannot be used, the operator drills to the position where the board is buried, moves the resistance plate upward along the support, and then removes it from the support. Since it is necessary to remove the anchor main body, the removal work becomes extremely difficult.

In view of the present situation, the present invention does not require excavation for extracting and removing the driven anchor anchor, and after removing the large load applied to the resistance plate at the time of extraction, the resistance plate and the resistance plate are connected to each other. It is intended to provide a branch anchor that can be removed from the ground at the same time without disassembling the anchor main body, and a method for extracting the branch anchor.

In order to achieve the above object, a branch anchor according to claim 1 of the present invention is provided.
A front-side substrate having an arrowhead shape, a pair of supports integrally connected to the upper portion of the substrate, and a branch connection connected to the upper portions of the pair of supports and connecting the pair of supports to each other An anchor body composed of members ,
The tip part is a mountain shape, and two plate-like bodies in which a bulging part for inserting one of the support rods is inserted in the center part are temporarily joined so that the plate surface other than the upper end part can be freely separated. A resistance plate in which an engagement protrusion that engages with the driving member is formed at the center of the upper edge ,
A base end portion is rotatably connected to an upper end portion of the resistance plate, and is composed of a pull-out member made of a rod-like body having a hook portion formed at the tip end portion .

The invention according to claim 2 of the present invention is
A front-side substrate having an arrowhead shape, a pair of supports integrally connected to the upper portion of the substrate, and a branch connection connected to the upper portions of the pair of supports and connecting the pair of supports to each other An anchor body composed of members ,
The tip part is a mountain shape, and two plate-like bodies in which a bulging part for inserting one of the support rods is inserted in the center part are temporarily joined so that the plate surface other than the upper end part can be freely separated. A resistance plate in which an engagement protrusion that engages with the driving member is formed at the center of the upper edge ,
The base end portion is rotatably connected to the upper end portion of the resistance plate, and is a method of pulling out a branch anchor formed of a rod-like member formed of a rod-like body having a hook portion at the tip end portion from the ground,
A branch anchor that is pulled out at the same time without separating the anchor main body, the resistance plate, and the branch connecting member for connecting the branch to the support by lifting the pulling member upward. This is a drawing method.

Branch anchor of the present invention is connected is a substrate to achieve the forwarding function when implanting into the ground to the lower end Rutotomoni, and the anchor main body consisting支杆connecting the branch supporting the utility pole on the upper end portion, to the substrate Since the lower end portion of the drawing member whose upper end protrudes from the ground surface is connected to the resistance plate of the branch anchor made of the resistance plate that expands and contracts along the formed expansion guide edge, the branch line When the anchor is buried in the ground, the upper end portion of the extraction member is always kept on the ground surface.
Therefore, when removing branch anchors from the ground due to reasons such as removal of utility poles, the upper end portion of the extraction member that is exposed is secured by appropriate means without excavating the buried part as before, and then the crane The branch anchor can be easily removed from the ground simply by lifting it upward using a mechanical force such as.

In the method for pulling out the branch anchor according to the present invention , the pull-out member for pulling out the branch anchor is connected to the upper end of the resistance plate that holds the expanded state in the ground in order to maintain the resistance in the ground. Therefore, when the pulling member is pulled upward, the anchor main body, the resistance plate, and the branch line connecting member for connecting the branch line to the branch can be separated at the same time, and in the expanded state. Since the resistance plate contracts as it is pulled upward, it can be easily and easily pulled out and removed without receiving a large resistance.

  Hereinafter, the branch anchor according to the present invention and a method of extracting the branch anchor will be described in detail with reference to the accompanying drawings.

1 is a front view showing an example of a branch anchor according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a front view showing an example of an anchor main body constituting the branch anchor, and FIG. 4 is an example of the branch connecting member. (A) is a front view, (B) is a side view.
5A and 5B are explanatory views showing an example of a resistance plate, where FIG. 5A is a front view, FIG. 5B is a side view, FIG. 6C is a plan view, and FIG. 6 is a main portion showing the relationship between the drawing member and the resistance plate. It is an enlarged view, (A) is a front view, (B) is a side view.

  The branch anchor (hereinafter also simply referred to as “branch anchor”) 1 of the present invention is basically composed of an anchor main body A, a resistance plate B, and a drawing member C.

As shown in FIG. 3, the anchor main body A includes a steel substrate 2, two steel supports 3 and 3 connected to the upper portion of the substrate 2, and upper portions of the supports 3 and 3. It consists of the branch line connection member 5 with which it is mounted | worn.
The substrate 2 is shaped like an arrowhead, and spread guide edges 2a and 2a are formed symmetrically on the left and right of the upper end surface, and a guide pipe (illustrated) for placing the substrate 2 in the ground at the center of the upper end. A recess 2b is formed to engage the lower end of (substantially).

Each of the supports 3 and 3 is made of a steel rod-like body having a required length (depending on the embedding depth), and a cut piece having the same diameter as that of the support 3 is welded to the outside of the upper end portion. An engaging portion 3a is formed, and an expansion guide portion 3b connected to the base of the expansion guide edge 2a of the substrate 2 is formed at the lower end thereof.
The lower surface portion of the spreading guide portion 3b is fixed to the upper end of the connecting plate 4 in which the lower portion is loosely coupled to the substrate 2, and is integrated with the substrate 2.

Since the connecting plate 4 is disclosed in Patent Document 1, the details thereof are not shown, but a single steel plate is formed in a U-shape and is folded in two so as to sandwich the substrate 2. It is what.
The connecting plate 4 is pivotally supported on the substrate 2 in a vertical posture along the longitudinal axis direction of the support 3.

Further , a branch line connecting member 5 is detachably attached to the upper and lower ends of the supports 3 and 3 with respect to the supports 3 and 3.
As is apparent from FIG. 4, the branch line connecting member 5 is arranged on the left and right sides with a predetermined interval to integrally connect the two supports 3 and 3, and the central portion of the surface of the substrate 5a. In addition, a lower end portion of a branch rod 5b having a ring-shaped connector 5c for connecting a branch line (not shown) to the upper end portion is integrally fixed.

  The substrate 5a is integrally formed with side plates 5e and 5e formed with notches 5d engaged with the engaging portions 3a attached to the upper end of the support 3 so as to face the substrates 5a at the left and right ends, respectively. In addition, a pair of holding metal fittings 5f and 5f are integrally attached to the center of the back surface of the substrate 5 so as to come into contact with the outer peripheral portion of the support 3.

  The holding metal fittings 5f and 5f are engaged with engaging portions 3a and 3a provided on the upper end of the support rod 3 in the notches 5d and 5d, respectively, and then bent at a right angle in the direction of the arrow. This is for abutting and holding the flange 3 and the upper end surface of the engaging portion 3a, thereby preventing the branch rod 5b from descending. (See Figure 2)

In addition, the branch line connection member 5 with respect to the support rods 3 and 3 is not specified to the thing shown in figure, What is necessary is just a structure which can connect the branch line which supports a utility pole to an anchor main body.
Therefore, if the structure of the branch line connecting member 5 is changed, the connecting means to the supports 3 and 3 are naturally different, and the shape of the upper end portion of each branch 3 is also changed.

  The resistance plate B is arranged so as to be orthogonal to the substrate 2 and then lowered along the supports 3 and 3, and finally the spreading guide portions 2 a and 2 b formed on the upper edge of the substrate 2. It expands along 2a, and there exists a resistance with respect to the drawing direction load of the anchor main body 1.

As shown in FIG. 5, the resistance plate B is formed so that the tip portion is substantially in a mountain shape, and the bulging portion 6 b for inserting one support rod 3 in the center portion is formed outward. The upper edge portions of the two plate-like bodies 6a, 6a are integrally coupled with their lower portions being detachable.
An engagement portion 6c for engaging a tool such as a guide pipe for driving the resistance plate B is integrally provided at the center of the upper edge portion of the resistance plate B.

  The above-described branch anchor 1 is merely an example of implementation, and includes an anchor main body composed of a support to which a branch line is connected to the upper end, a substrate to which the lower end of the support is connected, and the support. The structure is not particularly limited as long as it is a branch anchor that is attached to the anchor main body via a rod and is composed of a resistance plate that exhibits resistance to the anchor main body in the pulling direction load.

  On the other hand, the drawing member C constituting the branch anchor 1 of the present invention is made of a steel rod-like body 7 having a required thickness and length as shown in FIG. The hook portion 7a is formed by being bent into a shape, and the engaging portion 7b is formed by bending the lower end portion at a substantially right angle.

The drawing member C having such a shape penetrates through a through hole 6d formed in a part of the engaging portion 6c integrally attached to the upper end portion of the resistance plate B, and the engaging portion 7b protrudes to the opposite side. Is integrally connected and fixed to the resistance plate B by means such as welding.
In addition, the connection means of the drawing member C to the resistance plate B is not limited to fixation, and may be rotatably mounted using a nut.

  The branch anchor 1 having the above-described structure has the substrate 2 driven to a predetermined depth using a small vibration driving machine (not shown) or a guide pipe in a prepared hole shallowly formed in a predetermined portion of the ground. After that, the supports 3 and 3 are inserted into the bulging portions 6b and 6b formed on the resistance plate B in a state where the substrate 2 and the plate-like bodies 6a and 6a are orthogonal to each other, and the supports 3 and 3 are guided. The resistance plate B is driven by a guide pipe.

The plate-like bodies 6a, 6a of the resistance plate B lowered along the supports 3, 3 are temporarily disengaged when reaching the expansion guide portion 3b of the support 3, and thereafter, the plate-like bodies 6a, 6a, 6a is unfolded along the expansion guide portion 2a of the substrate 2 to be in a state as shown in FIG.
At that time, the upper end portion of the branch line connecting member C and the upper end portion of the drawing member C whose lower end portion is connected to the engaging portion 6c formed on the upper end portion of the resistance plate B are required from the ground surface GL. The length is in a protruding state. (See Figure 1)

  When driving of the branch anchor 1 to the ground is finished, the branch connecting member 5 is attached to the upper ends of the supports 3 and 3, the holding metal fittings 5f and 5f are bent at right angles, and the inner surface thereof is engaged with the support 3 and After making contact with the upper end surface of the portion 3a, the earth is backfilled in the prepared hole and the driving operation is completed.

After that, after connecting the branch line to the connector 5c provided at the tip of the branch line rod 5b by an appropriate means, the branch wire rod 5b and the drawing member C are covered between the connector 5c and the ground surface GL. If a cover member (not shown) is attached, all operations are completed.
The procedure for laying the branch anchor 1 is not limited to the above means.

  In order to remove the branch anchor 1 thus buried from the ground, the cover member covering the branch rod 5b and the drawing member C is removed, and after the connection between the connector 5c and the branch line is released, for example, in a crane The tip of the mounted winch is engaged with a hook portion 7a formed at the tip of the rod-like body 7 and lifted upward to pull out the branch anchor 1 from the ground.

At the time of the extraction, since the lower end portion of the extraction member C is connected to the engagement portion 6c fixed to the upper end portion of the resistance plate B, when the lifting of the extraction member C by the crane is started, The resistance plate B connected to the drawing member C moves upward along the supports 3 and 3.
Therefore, the lower end portions of the plate-like bodies 6a and 6a that have spread along the spread guide edge 2a of the substrate 2 are contracted as the resistance plate B is lifted upward. The resistance force against the load is gradually reduced, the resistance generated in the drawing is largely lost, and the drawing operation can be carried out smoothly.

  When the upper end portion of the resistance plate B that rises along the support rods 3 and 3 comes into contact with the lower end portion of the branch wire connecting bracket 5 along with the drawing operation, the support rods 3 and 3 and the branch wire connecting bracket 5 are suppressed. Since the metal members 5f and 5f are integrated, when the pull-out member C is further lifted upward, the substrate 2 connected to the support rods 3 and 3 is also pulled upward, and the branch anchor 1 is removed from the ground. It is something that can be done.

  The branch anchor 1 according to the present invention connects the base end portion of the drawing member C that exposes the upper end portion to the ground surface to the upper end portion of the resistance plate B for increasing the resistance against the load in the drawing direction. Is pulled upward, the lower ends of the respective plate-like bodies 6a, 6a of the resistance plate B that have spread along the spread guide edges 2a, 2a of the substrate 2 constituting the anchor main body A are contracted. Therefore, the resistance in the drawing direction by the resistance plate B is largely eliminated.

Furthermore , when pulling out, there is no need to separate the branch line connecting member and resistance plate, which are connected to the support bar, from the anchor main body as before, and the branch line anchor itself can be pulled out in a single operation, making it easy to pull out. Moreover, it can be carried out easily, efficiently and in a short time.

It is a front view which shows an example of the branch line anchor concerning this invention. It is the same side view. It is a front view which shows an example of the anchor main body which comprises a branch line anchor. It is explanatory drawing which shows an example of the branch line connection member, (A) is a front view, (B) is a side view. It is explanatory drawing which shows an example of a resistance board, (A) is a front view, (B) is a side view, (C) is a top view. It is an enlarged view of the principal part which shows the relationship between a drawing member and a resistance board, (A) is a front view, (B) is a side view.

DESCRIPTION OF SYMBOLS 1 Branch line anchor 2 Board | substrate 2a Expansion guide edge 3 Branch 4 Connection plate 5 Branch connection member 5b Branch line 5f Holding metal 6a Plate body 6b Expansion part 6c Engagement part 7 Rod body 7a Rod body hook part 7b Rod body Engagement part A Anchor main B Resistance plate C Pull-out member

Claims (2)

A front-side substrate having an arrowhead shape, a pair of supports integrally connected to the upper portion of the substrate, and a branch connection connected to the upper portions of the pair of supports and connecting the pair of supports to each other An anchor body composed of members ,
The tip part is a mountain shape, and two plate-like bodies in which a bulging part for inserting one of the support rods is inserted in the center part are temporarily joined so that the plate surface other than the upper end part can be freely separated. A resistance plate in which an engagement protrusion that engages with the driving member is formed at the center of the upper edge ,
A branch anchor comprising a pull-out member made of a rod-like body having a base end portion rotatably connected to an upper end portion of the resistance plate and having a hook portion formed at a tip end portion . A front-side substrate having an arrowhead shape, a pair of supports integrally connected to the upper portion of the substrate, and a branch connection connected to the upper portions of the pair of supports and connecting the pair of supports to each other An anchor body composed of members ,
The tip part is a mountain shape, and two plate-like bodies in which a bulging part for inserting one of the support rods is inserted in the center part are temporarily joined so that the plate surface other than the upper end part can be freely separated. A resistance plate in which an engagement protrusion that engages with the driving member is formed at the center of the upper edge ,
The base end portion is rotatably connected to the upper end portion of the resistance plate, and is a method of pulling out a branch anchor formed of a rod-like member formed of a rod-like body having a hook portion at the tip end portion from the ground,
A branch anchor that is pulled out at the same time without separating the anchor main body, the resistance plate, and the branch connecting member for connecting the branch to the support by lifting the pulling member upward. Drawing method.

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