JP2939896B2 - Branch line snow protector for utility pole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to prevent a branch line, which is tensioned between a high place of a telephone pole and the ground for the purpose of preventing the collapse of the telephone pole, from breaking due to the sedimentation pressure of a snow layer in a snowy area. Field of the Invention The present invention relates to a utility pole snow breaker for a utility pole to eliminate a collapse accident.

[0002]

2. Description of the Related Art There is a structure in which a branch line is extended between a high place of a telephone pole and the ground in order to prevent the collapse of the telephone pole. Since an excessive tension is applied to the branch line and the branch line itself may be broken, a snow-resistant structure for preventing the branch line from being overloaded has been proposed and implemented as shown in FIG.

That is, this type of snow-resistant structure is provided between a fastening band 52 fixed to a relatively high position of a telephone pole 51 established on the ground surface 50 and an anchor member 54 embedded in an inclined surface (slit surface) 53. When the branch line 55 formed by twisting wire iron wires is stretched, a coil spring 56 having a required tensile elastic force is interposed and connected between the branch line 55 and the fastening band 52.

In the snow-resistant structure, when sedimentation pressure due to snow accretion or snow accumulation is applied to the branch line 55 due to concentrated heavy snow, etc., the elasticity of the coil spring 56 expands and absorbs it. Then, the accident of collapse of the electric pole 51 is to be eliminated.

[0005]

However, the amount of sedimentation of the snow layer in a snowy area is unexpectedly large, and in particular, the snow accumulated on the slope 53 is reduced as shown by the broken line in FIG. Since the branch line 55 moves while being deformed by the sedimentation pressure (arrow A) sliding along the axis, the maximum extension length of the coil spring 56 is often exceeded. When the coil spring 56 exceeds the maximum elongation length, the coil spring 56 is fully extended, and the snow-resistant structure does not perform its function.
5 or the coil spring 56 is disconnected, so that the utility pole 51 cannot be supported, and the utility pole 51 is collapsed.

The present invention has been made in view of the above problems, and has a structure for elastically absorbing the displacement amount of a snow layer to prevent disconnection of a branch line even when the snow layer has a large sedimentation pressure. An object of the present invention is to provide a branch pole snow proof device having a new structure that can eliminate a collapse accident.

[0007]

According to the present invention, there is provided a branch pole snow protector for a utility pole, which comprises burying a lower end of the pole in the ground and setting up a pillar-like establishment such as a utility pole on the ground surface at a relatively high position of the pillar-like establishment. The gist of the present invention is that a structure supported by a branch line stretched in the middle has a structure interposed between the branch line and the columnar establishment.

The pole-pole snowproof device is pivotally attached to a lower fastening band attached to a utility pole via a pivot shaft such as a bolt and a nut so as to be pivotable in a vertical direction, and has a swing end. a swing arm formed by pivotally so as to be slidable along the slide member sliding pin shaft such hole edge to the sliding length hole formed in parts near the ring wear to the same electric pole A spring-suspended arm, which is shorter than the swinging arm pivotally attached to the upper tightening band via a pivot shaft such as a bolt and a nut so as to be vertically pivotable, the swinging arm and a spring The suspension arm is interposed between the two parts of the suspension arm near the pivot axis, and both ends are rotatably connected via pin shafts provided on the swing arm and the spring suspension arm, respectively. The connecting rod that synchronizes approximately the same amount and the sliding slot of the swing arm One end is connected to the sliding pin shaft member provided, the other end is connected to the swinging end of the spring suspension arm, and a coil spring is formed between the two arms so as to be elastically pulled. .

The gist of the invention is that the swing end of the swing arm of the power pole branch line snow proof device is rotatably connected to a branch line end connected to an anchor member embedded in the ground. It is.

Further, in the structure for synchronizing the swing angles of the swing arm and the spring suspension arm by an equal amount, the position of the pivot shafts of the upper and lower fastening bands, the swing arm, the spring suspension arm, and the connecting rod are adjusted. The present invention can also be implemented by a parallel link structure connected so as to exhibit a parallelogram .

[0011]

In the normal established state, since the sliding member connected to one end of the coil spring is located on the swinging end side of the sliding elongated hole, a tension substantially equal to the initial set elastic force of the coil spring is applied. It is structured to be held and pulled.

When the portion of the branch line buried in the snow layer is bent by the sedimentation pressure of the snow layer due to the snow accumulation, the swing arm pivots downward about the pivot axis and is connected to one end of the coil spring. Since the moving member moves to the turning center side end side of the sliding elongated hole and the spring suspension arm connected via the connecting rod also turns downward around the pivot shaft, the extension amount of the coil spring is relatively small. The tension is suppressed, and a tension substantially similar to the initial set elastic force is maintained.

When the swing arm is swiveled to the maximum, the branch line and the rod direction of the swing arm are in a straight line.
Since the bearing tension is directly applied to the fastening band which is firmly fixed to the electric pole, an excessive load exceeding the extension limit is not applied to the coil spring.

When the sedimentation pressure applied to the branch line is eliminated due to the disappearance of the snow layer, the branch line is no longer bent, and the swing arm and the spring suspension arm elastically return to the initial position by the elastic force of the coil spring. Demonstrate the initial setting of the bearing tension by the coil spring to ensure the stable establishment of utility poles.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a branch pole snow protector for a utility pole according to the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a utility pole whose lower end is buried in the ground and is established on the ground surface a. In this embodiment, the utility pole 1 is erected at predetermined intervals on an inner curved road surface having an inclined surface b, and the power pole 1 is relatively high. A branch line 5 made of a wire formed by twisting a plurality of iron wires is provided between the branch line snowproof device 3 of the present invention fixed to the fastening band 2 fixed at the position and the anchor member 4 buried in the ground on the inclined surface b. It is a structure that supports the load that is stretched and tilted in the direction of arrow B.

The branch wire snow protector 3 is fixed to one side of the utility pole 1 by two sets of upper and lower fastening bands 2, 2. Are opposed to each other, and the flanges formed at the ends of both members are annularly fastened by bolts and nuts 11 and 12.

Numerals 6 and 6 denote swing arms each having one end pivotally connected to the flange of the lower fastening band 2 via a bolt / nut 11 so as to be pivotable in the vertical direction (arrow C). The swing-side end of the member is provided in parallel with a pin member 61 interposed therebetween. Sliding elongated holes 62 extending in the longitudinal direction are formed in the vicinity of the swing-side ends of the swing arms 6 and 6 so as to have a length substantially equal to a half length of the swing arm 6. A sliding pin shaft 63 pivotally mounted so that the axial step portions formed at both ends with respect to the sliding elongated holes 62, 62 are slidable along the edge of the hole.

Reference numerals 7 and 7 denote spring suspension arms each having one end pivotally connected to the flange of the upper fastening band 2 via a bolt / nut 12 so as to be pivotable in the vertical direction (arrow D). The swing-side end of the member is provided in parallel with a pin member 71 interposed therebetween. The spring suspension arm 7
Is shorter than the half length of the swing arm 6.

Reference numeral 8 denotes a connecting rod interposed between the rocking arm 6 and the spring suspension arm 7 between the members near the rocking axis. Arms 6 and 6 and spring suspension arms 7 and 7 are rotatably connected to each other via pin shafts 14 and 15 provided on suspension shafts.

The length between the two pin shafts 14 and 15 attached to both ends of the connecting rod 8 is equal to the length between the bolts and nuts 11 and 12 of the upper and lower fastening bands 2 and 2 (L1). The length between the bolt and nut 11 and the pin shaft 14 in the swing arm 6 is equal to the length between the bolt and nut 12 and the pin shaft 15 in the spring suspension arm 7 (L2). It is constituted so that it becomes. That is, the base of the swing arm 6 and the spring suspension arm 7 is connected to the connecting rod 8.
A parallel link structure having a parallelogram shape connected by a link is formed, and the turning angles of the arms 6 and 7 are synchronized by the same amount.

Reference numeral 9 denotes a sliding elongated hole 6 of the swing arm 6.
2 and one end thereof is connected to a pin member 71 provided at the swinging end of the spring suspension arm 7, and a tension elastic load is applied between both ends. This is a coil spring. The coil spring 9 is
It has the necessary elasticity to support the telephone pole 1,
In the stable position shown in FIG. 3A (the spring suspension arm 7 is at the uppermost turning position and the swing arm 6 is at the 45 ° turning position), the axial elasticity of the coil spring 9 at the point P1. The force F1 is set to be about 300 kilograms.

The swing end of the swing arm 6 is a pin member 61.
And the other end of the branch line is connected to the connection end of the anchor member 4 buried in the ground on the inclined surface b. The anchor member 4 has a structure in which an anti-wing 41 perpendicular to the pulling direction is protruded from a portion to be buried in the ground to exert a sufficient underground gripping force.

Reference numeral 10 shown in FIG. 2 is a drop-in buffer hook for suspending a drop-in wire d for distributing power from a utility pole to a building c on the power consumer side on the building c side.

The electric pole branch wire snowproof device 3 having the above-described structure acts as follows on the sedimentation pressure due to the sedimentation displacement of the snow layer due to the snow accumulation. In a normal standing state, the branch line snowproof device 3 is supported by the branch line 5 in a posture shown in FIG. That is, in this position, the sliding pin shaft 63 connected to one end of the coil spring 9 is located on the swinging end side P1 of the sliding elongated hole 62, so that the initial set elastic force F1 ( = 300 Kg) and a tension support with a tension approximately equal to 300 kg).

When the snow layer sinks due to the snowfall, the portion of the branch line 5 buried in the snow layer e is bent (arrow E) due to the sedimentation pressure of the snow layer, and swings as shown in FIG. Arm 6
Pivots downward (arrow C) about the bolt and nut 11. In this position, the sliding pin shaft 63 connected to one end of the coil spring 9 is located at the end of the sliding elongated hole 62 on the turning center side, and the spring suspension arm 6 connected via the connecting rod 8 is connected. Since the coil spring 9 is pivoted downward (arrow D) about the bolt and nut 12, the amount of extension of the coil spring 9 is suppressed to a relatively small amount, and the initial set elastic force F
The structure is such that it is supported by tension with a tension substantially similar to 1.

Compared with the conventional structure shown by a two-dot chain line (arrow F) in which the coil spring 9 is connected to the end of the branch line 5, the extension amount of the coil spring in the conventional structure is approximately twice the initial length. In this case, the tension load at this time is such that the initial set elastic force is almost doubled and the coil spring may be damaged even when the elongation limit is not exceeded.

In the structure of the present invention, as shown in FIG. 3 (c), the pivot line of the swing arm 6 is 135 degrees, that is, the branch line 5 stretched so as to be 45 degrees with respect to the telephone pole 1 and the swing line 5 and the swing line. When the rod direction of the moving arm 6 is straight, the bearing tension is directly applied to the fastening band 2 tightly fixed to the electric pole 1 via the bolt / nut 11, and the extension of the supporting band with respect to the coil spring 9 is limited. Excessive load exceeding the limit is not applied.

When the sedimentation pressure applied to the branch line 5 is eliminated by the disappearance of the snow layer, the bending of the branch line 5 (arrow E) is eliminated, and the resilient force of the coil spring 9 causes the swing arm 6 and the spring suspension. The suspension arm 7 is shown in FIG.
, And the stable setting of the utility pole 1 is ensured by exhibiting the initial set bearing tension.

It should be noted that the branch line snowproof device 3 of the present invention is not limited to the utility pole 1 described in the above-described embodiment, but also has various structures for supporting a ground-based building subjected to an eccentric load using the branch line 5 due to snow. Needless to say, it can be used as a structure for protecting the branch line 5 from the sedimentation pressure of the snow layer.

[0030]

As described above, the branch pole snow protector for a utility pole according to the present invention is provided with a swinging arm pivotally provided so as to be pivotable in the vertical direction so that the sedimentation pressure of the snow layer caused by snow accumulation is elastically restored by a coil spring. The coil spring is absorbed by the displacement of the rocking position of the coil spring, and an excessive load exceeding the allowable elongation is not applied to the coil spring. It has excellent features for eliminating problems such as breakage accidents due to loads exceeding the elastic limit and preventing collapse of columnar establishments such as electric poles, and the effect after the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a utility pole snow-resistant device according to the present invention.

FIG. 2 is an explanatory view showing a use state of the utility pole snow breaker.

3 (a), 3 (b) and 3 (c) are explanatory views showing the operation of a utility pole snow breaker according to the present invention.

FIG. 4A is a schematic view showing a conventional snow-resistant structure, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power pole 2 Tightening band 3 Branch line snowproofer 5 Branch line 6 Swing arm 62 Sliding long hole 63 Sliding pin shaft 7 Spring suspension arm 8 Connecting rod 9 Coil spring 11, 12 Bolt and nut

Claims (2)

(57) [Claims] 1. A structure in which a pillar-shaped establishment such as a telephone pole buried on the ground surface with its lower end buried in the ground is supported by a relatively high position of the pillar-shaped establishment and a branch line stretched in the middle of the ground. The structure is interposed between the pillar-shaped establishments, and is pivotally attached to the lower fastening band that is attached to the telephone pole so that it can pivot vertically in the vertical direction via a pivot shaft such as a bolt or nut. A long sliding hole extending in the longitudinal direction is drilled, and a sliding member such as a sliding pin shaft is pivotally mounted on the long sliding hole so as to be slidable along the edge of the hole. A moving arm, an upper fastening band that is attached to a telephone pole, and a spring suspension arm that is pivotally connected to a vertical axis via a pivot shaft such as a bolt and a nut and that is shorter than the swing arm. The swing arm and the spring suspension arm are interposed between the members near the pivot axis. A connecting rod for rotatably connecting the ends via pin shafts provided on a swing arm and a spring suspension arm, respectively, and synchronizing the turning angles of both arms by substantially the same amount; and a sliding length of the swing arm. One end is connected to the sliding member pivotally provided in the hole, and the other end is connected to the swinging end of the spring suspension arm, and a coil spring is formed between the two arms to urge elastically. A branch wire snowproofing device for a utility pole, wherein a pivot end of the pivot arm is rotatably connected to a branch end connected to an anchor member embedded in the ground. 2. A structure for synchronizing the turning angles of the swing arm and the spring suspension arm by an equal amount is provided at both ends of the pivot shafts of the upper and lower fastening bands and both ends of the connecting rod.
A quadrilateral with both pin axes as vertices should be a parallelogram
The swing arm, spring suspension arm and connecting rod
2. A connected parallel link structure.
A branch line snow protector for the utility pole described.