JP2530557Y2 - Pillar work fall prevention net - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention attaches to a utility pole below the feet of a worker when working mainly on poles such as utility poles, and is a danger to falling objects during work. The present invention relates to a net for preventing falling objects for work on a pole for preventing the occurrence of the object.

[Prior Art] Conventionally, as this kind of fallen object prevention net, as shown in FIG. 5, a metal fitting 32 having a band 31 wound around a telephone pole is used.
In addition, one end of each of the plurality of bone rods 33 is attached so as to be swingable in the horizontal direction, and a net 34 is directly laid on an upper surface on which the plurality of bone rods 33 are radially arranged. Are fixed to bone rods 33 arranged on both sides.

[Problems to be solved by the invention]

However, the above-mentioned conventional fallen object prevention net,
Although the bone rod is mounted so that it swings in the horizontal direction, it is not structured to absorb and receive the impact of falling objects. The impact load may cause the falling object to fall on the road by breaking through the net or damaging the bone rod, and there is a problem that the original role of preventing danger is not sufficiently fulfilled. .

Therefore, the present invention has been made based on the above circumstances, and provides a fallen object prevention net that can reliably receive a fallen object without being damaged and contribute to ensuring safety of passersby and ground workers. The purpose is to:

[Means for solving the problem]

In order to achieve the above-mentioned object, the present invention provides a support pole attached to a tightening band for a pole of a utility pole, in which a shaft having a first elastic body is attached at a lower part, and several arm rods are attached to the shaft. Are movably mounted in the circumferential direction of the shaft and in the direction along the shaft core, respectively.
An erecting pipe is erected at the tip of each arm rod, and each tip of each arm rod radially arranged from the axis is connected by a first wire, and a space is provided at an upper position along each arm rod. The second wire is stretched while being held, and held in each riser pipe through which both ends of the first wire and one end of the second wire are inserted, in a direction in which the insertion end is stretched. The second elastic body to be inserted is inserted, and a stopper that is movable in a direction along the axis of the shaft is attached to the upper part of the shaft, and the other end of the second wire is connected to the stopper, as described above. A spring member for urging the two arm rods located on both sides of the several arm rods in the direction in which the first wire extends is attached to a shaft, and a net continuous over the upper surfaces of the first wire and the second wire. And the periphery of the net is attached to the first and second wires. And it features.

[Action]

If a fastening band is wrapped around the pole at a predetermined height and tightened, and the net is spread in the circumferential direction of the pole, and fixed in a state where the net is spread, the impact load on the net of falling objects falling from the pole during the work, It absorbs and relaxes by the synergistic action of the wire supporting the net, the elastic body, and the arm rod. That is, each of the first wires and each of the second wires that directly hold the net with an interval between each arm rod and the upper side thereof are tensioned while maintaining the expansion and contraction force by the second elastic body and the spring member. Each arm rod, which is supported and supports the first and second wires, is pivotally movable up and down (axial direction) by a first elastic body together with a stopper connected to the other end of the second wire. Since the net is held, the net exerts a flexible cushion function against an impact load from above and absorbs the impact energy of a falling object. In addition, with respect to the impact load of a falling object dropped on the net near both sides, the arm rod receiving the urging force of the spring member is instantaneously moved in a direction opposite to the urging force, in combination with the cushion function described above. Therefore, the impact applied to the net is alleviated in a well-balanced manner. Further, since the net is held at an upper position with a distance from the arm rod, the falling object does not directly hit the arm rod.

〔Example〕

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

1 to 4 show an example of a typical embodiment of a fallen object prevention net for work on a pole according to the present invention. Reference numerals 1 and 1 denote upper and lower tightening bands that are wound around and fixed to a pole body such as a telephone pole. Each of the upper and lower tightening bands 1 and 1 has a ratchet type structure, and can be strongly fixed to the telephone pole by the tightening bracket 2. It has become. Reference numeral 3 denotes a support bracket which is attached to the upper and lower tightening bands 1 and 1 and which is spaced apart from the center of the circular tightening band 1 by approximately 80 degrees. It is provided in the place. Each support bracket 3,
The shaft 5 is attached to the bracket 3 by protruding brackets 4, 4 up and down.

A first coil spring 6 is wound around the lower part of each shaft 5, and two connecting rings 7, 8 are moved in a direction along the axis by receiving a cushion by the first coil spring 6, and at the same time, the shaft circumference is changed. It is inserted vertically so that it can rotate freely in the direction. Arms 10 are connected to each of the connecting rings 7, 8 by protruding a pair of mounting pieces 9, 9 on the left and right. The tip of each arm rod 10 is a rising tube 11 bent upward
have.

Reference numeral 12 denotes three first wires that connect the respective ends of the four arm rods 10 arranged substantially radially, and reference numeral 13 denotes an upper position along each arm rod 10 with a space therebetween. These are the four second wires to be stretched. Both ends of each of the first wires 12 and one end of each of the second wires 13 are connected to a rising pipe of each arm rod end, respectively.
11, each of its insertion ends is locked by a wire stopper 14, and a rising pipe is interposed through a second coil spring 15.
It is held by a receiver 16 fitted to the rim of the eleventh (see FIG. 3). The other end of the second wire 13 is connected to the shaft 5
The first coil spring 6 is held by a stopper 17 which is movably fitted in a direction along the axis at an upper position of the first coil spring 6. Therefore, each first wire
Each of the second wires 12 and the second wires 13 is held in a state of having elasticity of vertical movement as well as being extendable and contractible.

Reference numeral 18 denotes a spring member wound around each shaft 5. The spring member 18 extends in a direction in which the first wire 12 is stretched on both arm bars 10, 10 located on both sides of the four arm bars 10. Each first wire 12 can be stretched to an appropriate length by this urging force. However, the strength of the spring member 18 is set such that the elasticity of each first wire 12 by the second coil spring 15 is sufficiently maintained.

Reference numeral 19 denotes a tough net using, for example, a mesh yarn of nylon fiber yarn. The net 19 is laid continuously over the entire upper surface formed by the first wires 12 and the second wires 13 that are stretched. Further, the periphery of the net 19 is attached to the first wire 12 and the second wire 13 disposed at positions corresponding to the periphery. In addition, the net
The area where 19 is laid is the area that can sufficiently receive falling objects, that is, about 22 around the utility pole on the road side
It is preferable that the first wire 12 is extended over a range of about 0 degrees, so that the length of the first wire 12 is set using the urging force of the spring member 18 to determine the opening degree and the arrangement position of each arm rod 10. It is.

[Effect of the invention]

Since the fallen object prevention net for pole work of the present invention is configured as described above, the following effects can be obtained.

That is, according to the present invention, an appropriate number of wires are stretched in a state of maintaining elasticity by using a second coil spring (second elastic body) skillfully using a second coil spring (second elastic body) while maintaining an interval above the arm rod. Arm rod supporting the first coil spring (first elastic body)
The net held by this wire has a remarkably increased cushioning function and is designed to properly absorb the impact energy of falling objects falling on the net because it is configured to hold and support elasticity up and down together with the wire And
The falling object can be reliably received without damaging the net. Further, the arm rods arranged on both sides are appropriately biased in the direction in which the first wire is stretched by the spring member, so that the net can be reliably kept open, and the above-described net Not only can the cushion function be used effectively, but also the impact load of a falling object that has fallen on the net near both sides can instantaneously move the arm and rod in the direction of urging, thus balancing the impact on the net. Can absorb and absorb well. Furthermore, since the net is held at an upper position with a distance from the arm rod, the impact energy is not directly received by hitting the arm rod as in the related art, and all falling objects can be safely received by the net. .

Therefore, when the fall prevention net according to the present invention is installed around a power pole below a worker's foot when performing work on a pole such as a power pole on a road or in an urban area, bolts, nuts, electric wires and usage can be obtained. Even if a tool or the like is accidentally dropped, the falling object can be reliably received without damaging the net of the present invention, and the safety of passers-by and ground workers can be ensured.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a perspective view showing a holding structure of each wire end partly cut away, and FIG. FIG. 5 is a perspective view showing a conventional example in an attached state. DESCRIPTION OF SYMBOLS 1 ... Tightening band, 3 ... Support bracket, 5 ... Shaft, 6 ... 1st coil spring (1st elastic body), 10 ... Arm rod, 11 ... Rise pipe, 12 ... 1st wire, 13 ... 2nd wire, 15 ... second coil spring (second elastic body), 17 ... stopper, 18 ... spring member, 19 ... net

Claims (1)

(57) [Scope of request for utility model registration] 1. A shaft (5) provided with a first elastic body (6) at a lower portion thereof is attached to a support (3) attached to a tightening band (1) for a pole of a utility pole. At (5), several arm rods (10) are movably mounted in the circumferential direction of the shaft (5) and in the direction along the axis, respectively, and a rising pipe (11) is attached to the tip of each arm rod (10). )
A first wire (12) is used to connect each end of each arm rod (10) radially arranged from the shaft (5), and is positioned at an upper position along each arm rod (10). Keep the second
A wire (13) is stretched, and in each riser pipe (11) through which both ends of the first wire (12) and one end of the second wire (13) are inserted, the insertion ends are connected. A second elastic body (15) for holding a bias in the stretching direction is inserted, and a stopper (17) movable above the shaft (5) in a direction along the axis of the shaft (5). ), The other end of the second wire (13) is connected to the stopper (17), and the two arm rods (10, 10) located on both sides of the several arm rods are connected to the second arm (10, 10). 1
A spring (18) biasing in the direction in which the wire (12) stretches is attached to the shaft (5), and a net (19) continuous over the upper surfaces of the first wire (12) and the second wire (13).
And lay the periphery of this net (19)
Characterized by being attached to each of the second wires (12, 13) and a fall prevention net for work on poles