JPS62111018A - Anchor for branch line - Google Patents

Abstract

PURPOSE:To obtain stable tensile forces free of restoring phenomenon of developed attitude by a method in when the developing of resistance plates is ended, a hinge formed on the lower part of an inversed U-shaped support lever is positioned at the same level as the hinge of the resistance plate. CONSTITUTION:An anchor for branch line is inserted into and set in a hole 12, and the tip of a driving pipe is coupled with a notch for receiving a driving tool and a striking force is applied. Both resistance plates 2 are developed at an expanded lead angle (alpha) and penetrated into the ground and a hook metal 10 provided on the upper end of an auxiliary support lever 7 is coupled with the upper side of the hook plate 8 of the lever 7. When the plates 2 are driven only by a necessary stroke L, the driving operation by a driving pipe is stopped, and the hole 12 is embedded to form a banking. The occurrence of the restoring phenomenon of developing attitude can thus be avoided, and stable tensile forces can be obtained. The developing attitude of the anchor can be kept.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a highly reliable branch line anchor.

[Conventional technology]

The lower end of the inverted U-shaped support rod is connected to the upper end with a hinge structure, and is connected to the tips of two resistance plates that are propelled into the soil by impact force. Connect the lower ends of the auxiliary support rods, and when the resistance plate has finished deploying,
An anchor in which both the apexes of the inverted U-shaped support rod and the auxiliary support rod coincide, and a branch line is commonly connected to both apexes, specifically, a branch line anchor as shown in Fig. 1θ has already been proposed. has been done.

In the anchor of B, when the resistance plate is in the final deployment position, the hinge part Q' point formed at the bottom of the inverted U-shaped support rod is located far below the hinge structure line P' point that connects the upper end of the resistance plate. configured to be located. If point Q' and point P' are set under such conditions (the coefficient of friction μ between the resistance plate and the soil
When is small 1 (clay or soft soil), the balance of the rotational moment acting around point P' is p Auxiliary support rod shared load W2: Inverted U-shaped support rod shared load T: Centripetal slurry X l-load (W z X tanθ2
), and the resistive plate inserted between 8 and 8 times will move back as shown by the dotted arrow, resulting in a significant decrease in tensile strength, and there is a risk that the anchor will come off when used as a high-load branch line such as a utility pole. There is a problem.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and solves the problems of the prior art by simple and rational means, and makes the rotational moment of the TxB act in a direction that further expands the resistance plate. It is an object of the present invention to provide a branch line anchor that does not cause the phenomenon of returning to its deployed position and provides stable tensile strength.

[Structure of the invention]

The structure of the present invention that solves the problems of the prior art is that the lower end of the inverted U-shaped support rod is connected to the upper end with a hinge structure, and
In a branch line anchor that is connected to the tips of two resistance plates that are propelled and deployed into the soil by impact force, and the lower end of an auxiliary support rod is connected to the upper end of the resistance plates, the resistance plate that constitutes the anchor is When the deployment is completed, the hinge part (Ql) formed at the bottom of the inverted U-shaped support rod is connected to the hinge part (Ql) of the resistance plate (
The lower end of the inverted U-shaped support rod is connected to the upper end by a hinge structure, and two resistance plates are propelled into the soil by impact force. In the branch line anchor, in which the lower end of the auxiliary support rod is connected to the upper end of the resistance plate, when the resistance plate constituting the anchor is in the deployed position, the bottom of the inverted U-shaped support rod is connected to the lower end of the support rod. The formed hinge portion (Q) is approximately at the same level as the sheep portion (P) of the resistance plate, or
The auxiliary support rod is positioned upward, and when the expansion is completed, the apex of the auxiliary support rod is combined with the inverted U-shaped support rod at a portion below the apex of the inverted U-shaped support rod. It is something to do.

〔Example〕

Embodiments of the configuration of the present invention will be described with reference to FIGS. 1 to 9. Figure 1 is a front view, Figure 2 is a side view of the same as above, Figure 3 is a front view of the upper part of the inverted U-shaped support rod, Figure 4 is a cross-sectional plan view of the same as above, and Figure 5 is a side view of the upper part of the auxiliary support rod. .

FIG. 6 is a front view of the main part, FIG. 7 is a front view of the main part of another embodiment, FIGS. 8a and b are explanatory diagrams of the burying process of the embodiment of the present invention, and FIG. It is a balance diagram of branch line load in a state.

Part 1 shown in Figure 1 is an inverted U-shaped support rod formed by bending a single metal rod so that the upper end becomes an inverted U-shape. It is opened downward at an angle θ1, and furthermore, the lower end of this inverted U-shaped support rod 1 is bent inward through a hinge portion Q point. Reference numeral 2 denotes two resistance plates whose upper ends are joined by spot welding processing means, etc. The two resistance plates 2 have an outwardly facing arcuate surface with a relatively large radius of curvature on the tip side. An expanded lead angle a is formed between the plates 2.

3 in the figure is a notch provided at the center of the upper end of the resistance plate 2 for receiving a driving tool.

A direction plate 4 along the longitudinal direction is attached to the outer side of both paper drag plates 2, and the lower end of the inverted U-shaped support rod 1 is fixed to the lower part of this plate by welding means or the like. Further, as is clear from FIG. 2, an elongated or arcuate hole 5 is provided in the horizontal direction slightly below the spot welding part of both embodiments 2, and a bendable hinge structure is provided in this part. Point P is formed.

Then, the vicinity of the lower part of the 99 pins formed at the lower part of the inverted U-shaped support rod 1 and the upper part of the direction plate 4 are connected with the stay rod 6, so that the hinge part of the inverted U-shaped support rod 1 is moved from the Q point. It is designed to be properly refracted.

Reference numeral 7 denotes an auxiliary support rod whose lower end is fixed slightly in the center of the upper end of one of the resistance plates 2, and the top of the auxiliary support rod 7 is attached to the above-mentioned inverted U-shaped support rod 1.
The upper part of this auxiliary support rod 7 is lower than the top of
It is inserted into a guide tube 9 fixed to the center of the sliding plate 8 of the auxiliary support rod provided as a bridge on the upper part of the auxiliary support rod 1. A hook-shaped latch 10 is engaged with the latch 10. As is clear from FIG. 5, at least the lower surface of this latch 10 is inclined so that the outer end faces downward. It is designed to be tightly engaged.

In the above embodiment, the lower end of the inverted U-shaped support rod 1 and the stay rod 6
and a part of the direction plate 4 constitute a triangular rigid body part, but instead of such a configuration, as shown in FIG. 7,
Isosceles triangle play!・Place the base of 11 in the above direction vs. 4
It may be fixed to a part of the plate 11 by welding means or the like, and the lower end of the inverted U-shaped support rod 1 may be pivotally supported at the apex of the plate 11.

Although not particularly shown, a direction plate 4 attached to the resistance plate 1
It is also possible to bend the material constituting the resistor plate into a 0-shape and construct it in one piece.

[For production]

Next, the method of driving the anchor of the present invention will be explained with reference to FIGS. 8a and 8b.

First, a hole 12 of the required diameter and depth is formed in front of the gate using a working machine such as a pole-erecting vehicle, as shown in FIG. 8a, and then the branch line anchor configured as shown in FIG. Insert and install. At this time, the tips of both paper antiplates 2 are connected to the holes 12.
It is placed on the bottom of the.

Next, the tip of a driving pipe (not shown), which is primarily used for anchor driving work, is engaged with the notch 3 for receiving a driving tool formed in the center of the upper end of the resistance plate 2. When the opening force is applied to this driving pipe to open both paper drag plates 2, both paper drag plates 2 are expanded along the angle a around the expansion 1, and are propelled into the soil, causing the auxiliary support rod 7 to open. Is the latch 10 on the top end? More specifically, when both paper drag plates 2 are expanded as shown in Fig. 8, and the required stroke is driven until they engage with the upper side of the sliding plate 8 of the support rod, the driving pipe is used to drive. By stopping the work and filling the hole 12 with earth, the burying of the branch line anchor is completed.

At this time, it goes without saying that the angle θ1 between the inverted U-shaped support rod 1 and the auxiliary support rod 7 before pouring changes greatly to θ2 after the pouring is completed, but the The point Q of the hinge part formed at the bottom of the support rod 1 was much lower than the point P of the hinge structure for deployment of both paper support plates 2, but at the end of casting and deployment, the distance of point Q from point P to point B was The anchor structure and the downward stroke L of the auxiliary support rod 7 are set so that it is in the upper position.
For example, at the anchor before casting,
By setting the distance gl L + between point P and point Q as L>L, the resistor plate is placed in the posture shown in Figure 8 at the end of deployment.

The balance diagram of the branch line load in the state shown in Fig. 8 is shown in Fig. 9.
The rotational moment that does not cause the developed resistor plate to return in FIG. 8 is (,17X W 2 X C) + (T X B ).

〔effect〕

According to the configuration of the present invention as described above, the following effects can be obtained.

(a) In the posture at the end of the deployment of the resistance plate, make sure that the point Q of the hinge formed at the bottom of the inverted U-shaped support rod is at the same level as the point P of the deployment hinge structure line of both paper resistance plates, or is above it. Therefore, the total rotational moment acting around point P is (μXW2XC) 10 (T'XB), and since the moment TXB acts in the direction in which the resistor plate is to be expanded, it is difficult to return to the deployed posture. No phenomenon occurs and stable tensile strength can be obtained.

(b) Since the auxiliary support rod is configured to be combined below the top of the inverted U-shaped support rod, the action of the TXB round moment that attempts to further expand the resistance plate is stopped at the combination point, and the expanded position In addition, since only the top of the inverted U-shaped support rod protrudes above the ground, connecting the branch line is easy at the ground level. It also has a nice finish.

[Brief explanation of drawings]

Figure 1 is a front view, Figure 2 is a top side view, Figure 3 is an inverted U.
A front view of the upper part of the glyph support rod, Figure 4 is a cross-sectional plan view of the same as above, Figure 5
The figure is a side view of the upper part of the auxiliary support rod, Figure 6 is a front view of the main part, Figure 7 is a front view of the main part of another embodiment, Figure 8 a and b are explanatory diagrams of the burial process, and Figure 9 is FIG. 8 is a balance diagram of the branch line load in the state shown in FIG. 8, and FIG. 10 is a front view showing the buried posture of the conventional example. 1. Inverted U-shaped support rod, 2. Resistance plate, 3. Notch. 4. Directional plate 25... Hole forming the hinge part, 6. Stay rod, 7. Auxiliary support rod, 8-. Plate for auxiliary support rod, 9-.
・Guide cylinder, 10 - Latch, 1 Hinge part of dobrate support rod, P... Hinge structure part of resistance plate. Figure 1 Figure 2 Figure 3 Figure 5 Figure 4 θ Figure 6 Figure 7 Figure 9 Figure 8 ≦ and -shi(g)i: =;

Claims (1)

[Scope of Claims] [Claim 1] (a) The lower end of the inverted U-shaped support rod is connected to the upper end by a hinge structure, and is attached to the tips of two resistance plates that are propelled and deployed into the soil by impact force. In a branch line anchor in which the lower ends of the auxiliary support rods are connected to the upper ends of the resistance plates, (b) when the resistance plates constituting the anchors are in the fully deployed position, the support rods are formed at the bottom of the inverted U-shaped support rods; hinge part (Q
) is at almost the same level as the hinge part (P) of the resistance plate,
Alternatively, a branch line anchor characterized in that it is positioned upward. [Section 2] (a) The lower end of the inverted U-shaped support rod is connected to the upper end with a hinge structure, and is also connected to the tips of two resistance plates that are propelled into the soil by impact force, and the resistance In a branch line anchor in which the lower end of the auxiliary support rod is connected to the upper end of the plate, (b) when the resistance plate constituting the anchor is in the deployed posture, the hinge portion (Q
) is at almost the same level as the hinge part (P) of the resistance plate,
(c) When the expansion is completed, the apex of the auxiliary support rod is joined to the inverted U-shaped support rod at a location below the apex of the inverted U-shaped support rod. A branch line anchor that is characterized by: