JP3178589U - Reinforcing brackets for concrete utility poles - Google Patents

Abstract

To provide a reinforcing member for a concrete electric pole that can suppress the protruding amount of a fastening means for fastening a band body as much as possible without placing anchor bolts on the concrete electric pole.
The reinforcing metal fitting 1 includes an inner reinforcing plate 11 and an outer reinforcing plate 12 that are placed on the outer periphery of a concrete electric pole 2 and have different lengths in the vertical direction, and the inner reinforcing plate 11 and the outer reinforcing plate 12 from above. The fastening band 13 comprises a fastening band 13 that is wound and fastened. The fastening band 13 has a length that is equal to or larger than the diameter of the concrete electric pole 2 and has a folded portion provided at one end thereof, and a folded portion of the band body. And a buckle that is inserted from the other end of the band main body wound around the concrete power pole 2 and is fastened to the other end of the band and then folded back in the direction opposite to the insertion direction. Is done.
[Selection] Figure 1

Description

  The present invention relates to a reinforcing member for a concrete electric pole that covers an outer periphery of an existing concrete electric pole and reinforces the concrete electric pole.

  As a reinforcing metal fitting for a conventional concrete electric pole, for example, a semi-cylindrical reinforcing plate is fitted to the outside of an existing concrete electric pole, and anchor bolts are driven into a plurality of through holes provided side by side in the vertical direction of the reinforcing plate. The reinforcing plate is fixed to the concrete power pole by tightening with a fastening nut that is screwed to the anchor bolt, and has a locking hook that locks into a receiving hole provided on the side end of the reinforcing plate, and an annular receiving at the other end The reinforcing plate is made into a concrete utility pole by connecting and tightening the nut with the band body provided with the piece on the inside of the receiving piece and the two screw bolts screwed to the nut through the receiving piece. The thing to fix is proposed (for example, refer patent document 1).

JP2011-184985A

  However, in the above-mentioned conventional metal pole reinforcing metal fittings, not only is it fastened and fixed by the band body between the side edges of the reinforcing plate placed on the outer circumference of the concrete electric pole, but also in order to obtain a high reinforcing effect, Since it was necessary to drive a bolt, there was a problem that the work burden of the driving operation was large and noise was generated when the anchor was driven.

  In the first place, reinforcement of concrete utility poles with reinforcing plates is a work to be carried out in response to the secular change of utility poles, but old concrete that has not been pre-tensioned to high-strength concrete utility poles and internal reinforcing bars in advance. Many poles are used for electric poles and the like, and even if an anchor bolt is to be driven to attach a reinforcing plate, the tip may hit the internal reinforcing bar and the anchor bolt may not be driven. In addition, there is a concern that cracks on the concrete surface may increase due to the anchor bolt placement, and there is an increasing demand to avoid anchor bolt placement as much as possible.

  In addition, the concrete utility poles close to the border with the house are difficult to rebuild immediately even if they become obsolete, so they may be temporarily reinforced by reinforcing plates, but the installation work space is narrow, There is also a problem that if the protruding amount (protruding amount) of the tightening means such as a bolt or nut for tightening the band main body is large, it cannot be inserted between the wall and the like and cannot be attached.

  Therefore, the present invention has been made to solve such problems, and it is possible to suppress the protruding amount of the fastening means for fastening the band body as much as possible without placing anchor bolts on the concrete utility pole. An object of the present invention is to provide a reinforcing member for a concrete electric pole that can be used.

In order to solve the above-mentioned problem, the concrete metal pole reinforcing bracket of the present invention is a concrete utility pole reinforcing bracket that covers the outer periphery of an existing concrete power pole and reinforces the concrete power pole. The inner reinforcing plate and the outer reinforcing plate are wound around the inner reinforcing plate and the outer reinforcing plate, and the inner reinforcing plate and the outer reinforcing plate are wound around the inner reinforcing plate and the outer reinforcing plate so as to make at least one turn. It consists of a tightening band that is fixed to a concrete power pole, and the tightening band has a length that is equal to or greater than the diameter of the concrete power pole and has a folded portion provided on one end thereof, and a folded portion of the band body. And is inserted from the other end of the band body wound around the concrete power pole. The direction of insertion, characterized by being configured and a buckle for fixing folded in the opposite direction.
Here, the buckle is formed with an insertion hole having a space equal to or greater than the thickness of the band main body between the buckle main body and the surface of the buckle main body, and the band main body from the inlet side to the outlet side of the insertion hole. Is inserted from the other end side, and then folded back from the outlet side to the inlet side and folded back from both sides of the buckle body at the entrance side of the insertion hole in the buckle body. The tongue main body is composed of a tongue piece portion that sandwiches the band main body from both sides thereof with the buckle main body surface, and an end portion on the outlet side of the folded back support portion is provided with a corrugated retaining portion. More preferably, the cross-sectional shape of the tip of the retaining portion is formed at an acute angle.

  In the concrete electric pole reinforcing bracket of the present invention, the tightening band that is wound and tightened on the inner reinforcing plate and the outer reinforcing plate on the outer periphery of the concrete electric pole is a band body having a length that is equal to or larger than the diameter of the concrete electric pole. And one end of the band main body is connected, the other end of the band main body wound around the concrete electric pole is tightened, and the other end of the band main body is folded back in the direction opposite to the insertion direction and fixed. Therefore, the amount of protrusion of the tightening means can be greatly reduced as compared with the conventional case where the bolt and nut are used as the tightening means of the band body. As a result, the reinforcing plate can be easily attached even in a place where the installation work space is narrow. In addition, the band body comes into contact with the entire circumference of the column via the reinforcing plate, and the other end of the band body is inserted into the buckle and folded back to tighten. However, the tightening force is increased, the adhesion between the reinforcing plate and the utility pole is improved over the entire circumference, and the load transmission efficiency is improved. As a result, since a high reinforcing effect can be obtained without placing anchor bolts on the concrete utility pole and the reinforcing plate, the workability of the reinforcing work is improved.

(A), (b) is the front view and side view which respectively show the state which reinforced the large diameter concrete electric pole with the reinforcement bracket of the concrete electric pole of this invention. (A), (b), respectively, is a developed view of the inner reinforcing plate before bending, and a plan view after bending. (A), (b), respectively, is a development view before bending of the outer reinforcing plate, and a plan view after bending. It is a perspective view of a band body. It is a perspective view of a buckle. (A)-(d) is a top view of a buckle, a front view, a rear view, and a bottom view, respectively. FIGS. 7A to 7C are an A partial enlarged plan view, a BB line end view, and a CC line end view of the buckle shown in FIG. (A), (b) is the top view and front view which respectively show the connection of the bending part of a band main body, and a buckle. It is a top view which shows the state which wound the fastening band around the outer side reinforcement board. (A)-(c) is a top view which shows the state after passing the other end of a band main body through a buckle, and turning up a tongue piece part, respectively. (A), (b) is the front view and side view which respectively show the state which reinforced the concrete electric pole of small diameter with the reinforcement metal fittings of the concrete electric pole of this invention.

  Hereinafter, embodiments of a reinforcing member for a concrete electric pole according to the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, a concrete metal pole reinforcing bracket 1 according to the present invention reinforces a concrete telephone pole 2 by placing it on an existing concrete telephone pole 2, for example, two pieces having different vertical lengths. The inner reinforcing plate 11 and the outer reinforcing plate 12, which are reinforcing plates, and a fastening band 13 are included. First, a case where a large-diameter concrete electric pole 2 having a column diameter (diameter) of 295 mm to 370 mm is reinforced will be described. In the present invention, the fastening band 13 according to the present invention is used to attach the inner reinforcing plate 11 and the outer reinforcing plate 12 to the portion of the concrete utility pole 2 that appears on the ground, and is hidden in the ground. As for the portion, a conventional tightening band using bolts and nuts may be used, or the tightening band 13 according to the present invention may be used. This is shown in FIG. The same applies to the concrete electric pole 2 'having a diameter.

  As shown in FIGS. 2 and 3, the inner reinforcing plate 11 and the outer reinforcing plate 12, respectively, are placed on the outer periphery of the concrete electric pole 2, and are, for example, 1.6 mm thick steel plates before bending. Then, as shown in FIGS. 2A and 3A, the width (length in the horizontal direction) is 870 mm, while the length in the vertical direction is changed to 1500 mm and 1300 mm. Yes. As shown in FIG. 1, first, an inner reinforcing plate 11 having a vertical length of 1500 mm is placed on a concrete electric pole 2 and its upper and lower ends are fixed with the fastening band 13 of the present invention. This is because the mounting work when covering the outer reinforcing plate 12 with a vertical length of 1300 mm and fixing with the fastening band 13 is taken into consideration.

  Further, as shown in FIGS. 2 (a) and 3 (a), the inner reinforcing plate 11 and the outer reinforcing plate 12, respectively, have a plurality of slits 11a, 12a continuous in the vertical direction at predetermined intervals. A plurality of rows are provided at predetermined intervals, and are curved according to the outer diameter of the concrete utility pole 2 as shown in FIGS. 2 (b) and 3 (b). In the present invention, providing the slits 11a and 12a in the inner reinforcing plate 11 and the outer reinforcing plate 12 is optional and can be omitted. Further, the number of the inner reinforcing plate 11 and the outer reinforcing plate 12 is not limited to two, and may be three or more as long as the inner reinforcing plate and the outer reinforcing plate are configured.

  The fastening band 13 includes a band main body 131 wound around the concrete reinforcing pole 2 over the inner reinforcing plate 11 and the outer reinforcing plate 12 placed on the outer periphery of the concrete electric pole 2, and the band main body 131. It comprises a buckle 132 as a fastening means for fastening.

  The band main body 131 is, for example, a stainless steel band having a thickness of about 1 mm and a width of about 30 mm. As shown in FIG. 4, the length is equal to or greater than the diameter of the concrete utility pole 2, for example, about 1500 ± 10 mm. And a folded portion 131b having a length of about 70 ± 5 mm formed by folding one end of the body portion 131a. The folded portion 131b will be described later on the buckle 132. As shown in FIGS. 8 (a) and 8 (b), the band main body 131 is wound around the entire circumference of the pillar by using it, and it is immediately shifted to the tightening and fixing work without requiring a complicated structure or temporary fixing. can do. Instead of providing the folded portion 131b at one end of the band main body 131, one end of the main body 131a may be fixed to the buckle 132 by welding to the buckle 132 or placing a grommet.

  As shown in FIG. 5, the buckle 132 is formed to be thin by, for example, cutting a single steel plate having a thickness of 2.0 mm so as not to protrude (thicken) as much as a bolt or a nut. It has a folding back support part 132b and a pair of tongue pieces 132c, 132c.

  The folded back support portion 132b is formed by making two cuts of a width or more so that the band main body 131 passes through the flat buckle main body portion 132a and raising the gap between the cuts. An insertion hole 132d having an interval that allows the band main body 131 to pass therethrough is provided. Then, after the other end 131c of the band body 131 is inserted from the inlet 132d1 side of the insertion hole 132d to the outlet 132d2 side, the other end 131c is folded back from the outlet 132d2 side to the inlet 132d1 side, thereby tightening bolts and nuts. The band main body 131 can be fixed without using any means. Here, in this embodiment, as shown in FIG. 5 and FIG. 6 and the like, the central portion 132a1 of the buckle main body portion 132a through which the band main body 131 passes is recessed from both end portions 132a2 and 132a2.

  Further, the exit 132d2 side of the folded back support portion 132b has a wave shape (mountain shape) cut as shown in FIG. 5, FIG. 6 (a), and FIG. A portion 132b1 is provided, and a tip crack portion 132b2 is provided at the tip. Therefore, the end portion of the buckle body portion 132a facing the retaining portion 132b1 is also formed in a wave shape as shown in FIG. In the present embodiment, the corrugated retaining portion 132b1 and the tip crack portion 132b2 are crushed by surface pressing or the like and inclined so as to become thinner toward the tip portion, as shown in FIGS. 7B and 7C. The blade is formed at an acute angle like the blade shape of the blade, and the thickness of the tip portion is the thinnest in the buckle 132. Thereby, when the other end 131c of the band main body 131 is folded back by the folding support portion 132b, the distal end portion and the tip crack portion 132b2 of the retaining portion 132b1 having a waveform (mountain shape) and a thin thickness are folded back portions. Therefore, the band main body 131 can be reliably fixed in a tightened state without using bolts and nuts as the tightening means of the band main body 131. However, in the present invention, it is not essential to provide the tip crack portion 132b2, and it may be omitted.

  The tongue pieces 132c and 132c are respectively provided by cutting up from the both sides of the buckle body 132a to the middle at the end of the insertion hole 132d on the inlet 132d1 side in the buckle body 132a. The other end 131c of the band main body 131 folded back is clamped between the opposite sides of the band main body 131 and the surface of the buckle main body 132a. Thereby, even if it does not use a volt | bolt etc., the other end 131c of the band main body 131 can be fixed in the state clamp | tightened reliably. In addition, the tongue piece 132c is bent and the other end 131c of the band main body 131 is sandwiched between the opposite sides of the surface of the buckle main body 132a from both sides, thereby preventing the end of the band main body 131 and the extra length from rising. Can prevent protrusion to the sidewalk.

  Next, a procedure for winding the reinforcing pole 1 of the concrete electric pole configured as described above around the concrete electric pole 2 will be described.

  First, the inner reinforcing plate 11 having a long length in the vertical direction is fitted so as to be covered from the deteriorated portion side of the concrete electric pole 2 and attached so that the deteriorated portion is substantially at the center in the vertical direction of the inner reinforcing plate 11. In that case, when fitting in a high place, it lifts with the crane etc. through the hole etc. for dove pickling plating which the inner side reinforcement board 11 does not illustrate. Next, the inner reinforcing plate 11 is temporarily fixed by a temporary fixing belt or the like (not shown), and then the fastening band 13 is wound and fixed on the inner reinforcing plate 11 from above and below the inner reinforcing plate 11.

  As shown in FIGS. 8A and 8B, the fastening band 13 is wound first by hooking the buckle 132 to the folded portion 131b which is one end side of the band main body 131 and then as shown in FIG. The inner reinforcing plate 11 covered with the electric pole 2 is made to make a round from above, and the other end 131c of the band body 131 is passed through the insertion hole 132d of the buckle 132 as shown in FIG.

  Next, the other end 131c of the band main body 131 passed through the insertion hole 132d is tightened with a torque of about 25 N · m, for example, using a dedicated or generally distributed tightening tool (not shown). As shown in FIG. 10B, the other end 131c of the band main body 131 is folded back by the folding support portion 132b. In addition, when the other end 131c of the band body 131 is folded, the inner side of the folded portion bites into the retaining portion 132b1 and the front crack portion 132b2.

  Thereafter, the other end 131c of the band main body 131 folded back by the folding back support portion 132b is lightly struck with a hammer (not shown) or the like, and the tongue piece 132c is bent as shown in FIG. 10 (c). The inner reinforcing plate 11 is fixed to the outer peripheral surface of the utility pole 2 by hitting it with a hammer or the like from above. In addition, the extra length part of the band main body 131 which protrudes from the tongue piece part 132c is cut | disconnected.

  Next, the outer reinforcing plate 12 having a short vertical length from the top of the inner reinforcing plate 11 is filled with the gap between the tip portions of the inner reinforcing plate 11 from the direction opposite to the direction in which the inner reinforcing plate 11 is fitted. And are temporarily fixed at the center of the outer reinforcing plate 12 by a temporary fixing belt or the like (not shown), and then the five fastening bands 13 do not overlap the temporary fixing belt or the like at a predetermined interval of 30 cm or the like of the outer reinforcing plate 12. To wind and fix. The temporary fixing belt or the like is removed after the fastening band 13 is attached at several places.

  Thereby, in the case of a large-diameter concrete electric pole 2 having a column diameter (diameter) of 295 mm to 370 mm, the inner reinforcing plate 11 and the outer reinforcing plate 12 are tightened by the seven tightening bands 13 as shown in FIG. Can be fixed.

  Therefore, in the concrete metal pole reinforcing metal fitting 1 of the present invention, the buckle 132 formed by cutting and raising a single steel plate is used as a fastening means for the thin band main body 131, and bolts, nuts, etc. are not used. The number of parts is reduced, and the protruding amount of the fastening means protruding from the surfaces of the inner reinforcing plate 11 and the outer reinforcing plate 12 can be greatly suppressed. As a result, the inner reinforcing plate 11 and the outer reinforcing plate 12 can be easily attached even in a place where the installation work space is narrow.

  Particularly, when the other end 131c of the band main body 131 is inserted into the insertion hole 132d of the buckle 132 and tightened, the tightening force becomes stronger than the conventional bolt-nut coupling, so that the inner reinforcement The adhesion between the plate 11 and the outer reinforcing plate 12 and the concrete electric pole 2 is improved over the entire circumference, and the load transmission efficiency is improved. As a result, the inner reinforcing plate 11 and the outer reinforcing plate 12 can be firmly attached without placing anchor bolts on the concrete utility pole 2 as in the prior art, and the anchor bolt placing operation is unnecessary. Only workability is improved.

  In the present embodiment, the cross-sectional shape of the distal end portion of the retaining portion 132b1 is formed at an acute angle by surface pressing or the like, and the thickness of the distal end portion is the thinnest in the buckle 132. The folding angle of the band body 131 becomes more acute, and the inner interval when the band main body 131 is folded back is narrowed. Thus, the folded band main body 131 is in close contact with the retaining portion 132b1, and the retaining effect is further increased. Furthermore, in the present embodiment, the tip end portion of the retaining portion 132b1 has a corrugated shape as shown in FIGS. 5 to 8 and is provided with a tip crack portion 132b2, so that it receives a tension when the band body 131 is tightened. Since the top portion is increased, biting on the band body 131 is promoted, and the retaining effect can be further increased.

  In addition, in the case of a concrete electric pole 2 ′ having a small diameter of about 205 mm to 253 mm, the inner reinforcement is performed in the same manner as in the case of reinforcing the large electric pole 2 having a diameter of 295 mm to 370 mm. Although it is the same in that it is reinforced by the plate 11 ′ and the outer reinforcing plate 12 ′, the inner reinforcing plate 11 ′ and the outer reinforcing plate 12 ′ have the same vertical lengths of 1500 mm and 1300 mm, respectively. The width of the inner reinforcing plate 11 and the outer reinforcing plate 12 is 600 mm shorter than the width (horizontal length) of the inner reinforcing plate 11 and the outer reinforcing plate 12 in accordance with the pole diameter (diameter) of the concrete electric pole 2 ', and the thickness is also inwardly reinforced. A steel plate of 2 mm thicker than the thickness of 1.6 mm of the plate 11 and the outer reinforcing plate 12 is used.

  Then, the same tightening band 13 is used, and the deteriorated portion is reinforced by the inner reinforcing plate 11 ′ and the outer reinforcing plate 12 ′ in substantially the same procedure as in the case of the large-diameter concrete electric pole 2, and finally, As shown in FIG. 11, all the eight fastening bands 13 are wound and tightened from above the inner reinforcing plate 11 ′ and the outer reinforcing plate 12 ′. Therefore, first, when attaching the inner reinforcing plate 11 'to the concrete electric pole 2', the upper and lower sides thereof are temporarily fixed with a temporary fixing belt or the like, and then the outer reinforcing plate 12 'is covered from above to temporarily fix the center. After temporarily fixing with a belt or the like, the eight fastening bands 13 are wound and fixed from above the outer reinforcing plate 12 ′ so as not to overlap the temporary fixing belt or the like at a predetermined interval. The temporary fixing belt or the like is removed after the fastening band 13 is attached at several places. That is, in the case of the large-diameter concrete electric pole 2, only one temporary fixing belt is necessary, but in the case of this small-diameter concrete electric pole 2 ′, at least three temporary fixing bolts are required. However, since all of the eight fastening bands 13 are wound and tightened from above the inner reinforcing plate 11 'and the outer reinforcing plate 12', the inner reinforcing plate 11 ' The outer reinforcing plate 12 ′ can obtain the same strength as the large-diameter concrete utility pole 2.

DESCRIPTION OF SYMBOLS 1 Concrete metal pole reinforcement metal fitting 11,11 'Inner reinforcement board 12,12' Outer reinforcement board 13 Fastening band 131 Band main body 131a Main body part 131b Folding part (one end of band main body)
131c The other end of the band body 132 Buckle 132a Buckle body part 132b Folding support part 132b1 Detachment part 132b2 Pre-crack part 132c Tongue piece part 132d Insertion hole 2,2 'Concrete electric pole

Claims (2)

A concrete power pole reinforcing bracket that reinforces the concrete power pole by covering the outer circumference of an existing concrete power pole,
An inner reinforcing plate and an outer reinforcing plate covering the concrete power pole,
From the tightening band that winds and tightens the concrete power pole over the inner reinforcement plate and the outer reinforcement plate that are placed on the outer periphery of the concrete power pole and fastens the inner reinforcement plate and the outer reinforcement plate to the concrete power pole. Become
The fastening band has a length that is equal to or greater than the diameter of the concrete utility pole, a band body provided with a folded portion at one end thereof, and hooked on the folded portion of the band body and wound around the concrete utility pole. A reinforcing bracket for a concrete electric pole comprising a buckle that is inserted from the other end side of the rotated band main body and that folds and fixes the other end of the band main body in a direction opposite to the insertion direction. In the reinforcement bracket of the concrete electric pole according to claim 1,
The buckle is
A buckle body,
An insertion hole having a gap larger than the thickness of the band main body is formed between the surface of the buckle main body portion, and the band main body is inserted from the inlet side to the outlet side of the insertion hole from the other end side, and then the outlet A folding support part for supporting the band body folded from the side to the entrance side;
By being bent from both sides of the buckle body part on the entrance side of the insertion hole in the buckle body part, it is composed of a tongue piece part that clamps the band body between the buckle body part surface from both sides thereof,
A reinforcing bracket for a concrete electric pole characterized in that a corrugated retaining portion is provided at an end portion on the outlet side of the folding support portion, and a cross-sectional shape of a distal end portion of the retaining portion is formed at an acute angle. .

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