JP2521365Y2 - Power line approach warning tool for heavy machinery such as cranes - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a power transmission line approach warning tool for heavy machinery such as cranes, and more specifically, heavy machinery such as cranes around high-voltage power transmission lines and transmission line towers. The present invention relates to a power line approach warning tool for heavy machinery such as a crane, which is capable of visually warning the operator of the heavy machinery and surrounding workers of the danger of approach when the vehicle approaches.

[Conventional technology]

Conventionally, when operating heavy machinery such as a crane around a power transmission line or a power transmission line tower, a protection wire arm is usually attached to the steel tower, and a protection made of Kevlar rope or the like is provided between the protection wire arms of adjacent steel towers. By suspending the line and attaching a danger sign to the protection line, heavy machinery such as a crane is prevented from approaching and causing an induction obstacle due to the power transmission line.

By the way, an induced voltage is generated in the electric conductors that are close to the power transmission line, and when a person touches them, a shock may be felt. In order to prevent this, "transmission lines are
In addition to facilities to ensure that the electric field strength at 1 m is 30 V / cm or less, facilities must be constructed so that there is no danger of human beings due to electrostatic induction. However, this is not the case if facilities are set up so that there is no danger of human beings in fields, fields, forests, and other places where there are few people coming and going. "(Denki 112).

However, in recent years, construction work is often performed using heavy machinery such as cranes even in places where there are few people coming and going due to construction of residential land, etc. The induced voltage causes various accidents such as personal injury (electric shock accident) and disconnection of power lines.

Therefore, the inventor of the present invention, based on this point of view, firstly states, "An induced voltage detection unit equipped with an induced voltage detection sensor for detecting an induced voltage due to a transmission line, and a predetermined induction voltage detected by the induced voltage detection unit. When a voltage is detected, it has an audible display unit that audibly warns that, and a visual display unit that visually warns that, and the sensor for detecting the induced voltage is used for heavy machinery such as cranes. It is installed at the tip, and at least one auditory display and visual display are installed in or near the cockpit of heavy machinery such as cranes, and the auditory display is made by the induced voltage detection signal of the induced voltage detection sensor. Warning device for warning the danger of approach of heavy machinery such as cranes to power transmission lines through the control section and the visual display section (see Japanese Utility Model Application No. 61-180887).

Further, according to this device, the proximity of the heavy machinery such as a crane to the power transmission line can be detected by detecting the induced voltage of the power transmission line. It has the advantage of preventing accidents and electric shocks to workers.

[Problems to be solved by the device]

However, in the case of the above-mentioned devices and means, there is a problem that the detection cannot be accurately performed if the sensor for detecting the induced voltage, the alarm device or the like has a failure.

In addition, it is difficult to install the protection line, and in particular, it is impossible to force the installation of the protection line one by one, especially for a short-time work.

By the way, an electric shock accident due to the approach or contact between the boom of the heavy machinery such as the crane and the power transmission line occurs when the boom enters the approaching danger distance determined by the power transmitted by the power transmission line. However, the power transmitted by the power transmission line differs depending on the location where the power transmission line is installed.
Therefore, there are many cases where the approaching danger distance is wrong.

The present invention has been made in consideration of the above-mentioned points, and the object of the present invention is that it can be easily attached to the boom of heavy machinery such as a crane, and the approach determined by the transmission power of the transmission line. Can easily handle dangerous distances,
Another object of the present invention is to provide a power transmission line approach warning tool for heavy machinery such as a crane, which makes it possible to easily check the distance from the power transmission line.

[Means for solving the problem]

Further, the power transmission line approach warning tool for heavy machinery such as a crane of the present invention as a means for achieving the above object is rotatably attached to a boom of a heavy machinery such as a crane, and an approach danger interval between the boom and the power transmission line. A power line approach warning tool for heavy machinery such as a crane for visually confirming
It consists of a distance measuring rod formed by an extension type insulating rod having a weight at the rear end and a tip indicator such as a ball at the tip, and the length of the distance measuring rod is extended or retracted to extend or retract the insulating rod. The distance can be adjusted to an approach danger interval determined by the power transmitted by the power transmission line.

Further, the power transmission line approach warning tool for heavy machinery such as a crane of the present invention has a distance measuring rod, a horizontal measuring rod and a vertical measuring rod, and both the measuring rods can be cross-attached, if necessary. Moreover, it is characterized by being provided with a horizontal / vertical state holding portion capable of holding a horizontal state or a vertical state regardless of the vertical movement of the boom of heavy machinery such as a crane.

[Action]

The power transmission line approach warning tool for heavy machinery such as a crane of the present invention has a weight at the rear end and a distance measuring rod formed of an extended type insulating rod having a tip display member such as a ball at the tip. It is possible to adjust the length of the distance measuring rod by extending or retracting the insulating rod at an approach danger distance determined by the transmission power of the transmission line.
When the boom moves up and down, the distance measuring rod also moves up and down as a unit, so it is possible to visually check the position of the tip (release tip) of the distance measuring rod attached to the boom tip. This function allows the operator to easily check whether the boom tip of heavy machinery such as a crane is close to the approaching danger distance.

Further, the interval measuring rod is provided with a horizontal / vertical state holding portion capable of holding a horizontal state or a vertical state regardless of the vertical movement of the boom of a heavy machine such as a crane, and has a horizontal measuring rod and a vertical measuring rod, When both measuring rods are constructed so that they can be cross-attached, the distance measuring rods can be easily attached and the distance measuring rods are always held in a horizontal or vertical state, so that the distance measuring rods can be measured. You can check the rod in a stable state.

〔Example〕

Embodiments embodying the present invention will be described below with reference to the drawings. 1 to 7 show an embodiment of the present invention, FIG. 1 is a perspective view, FIG. 2 is a partially enlarged view, and FIG. 3 is a front view of a vertical distance measuring rod, and FIG. Is a front view of the fixture, FIG. 5 is a plan view of the fixture, FIG. 6 is a front view of the horizontal gap measuring rod, and FIG. 7 is an engagement state of the vertical gap measuring rod and the horizontal gap measuring rod. It is a front view for explaining.

In this embodiment, the crane vehicle 1 is provided with a space measuring unit 6 including a vertical distance measuring rod 4 and a horizontal distance measuring rod 5 at a boom tip 3 of a boom 2 of the mobile crane 1. When the boom tip 3 is close to the power transmission line 7, it can be visually confirmed.

The crane vehicle 1 is a normal crane vehicle, and the boom 2 thereof is configured to move up and down by a crane operation so that various operations can be performed. A space measuring unit 6 for detecting a space between the power transmission line 7 and the hole 8 formed in the boom tip 3 is detachably attached. Alternatively, it may be provided in the middle part of the boom.

The distance measuring unit 6 has a vertical distance measuring rod 4 and a horizontal distance measuring rod 5 in two directions.
Is attached to the boom tip portion 3 by a mounting tool 9. The attachment 9 can be inserted into the holes 8 and has a screw 10 formed at one end and an engaging portion 11 provided at the other end for attaching the vertical distance measuring rod 4, and a boom tip wall. It is composed of sandwiching plates 14 and 14 for sandwiching 13 and 13 from the outside, and a nut 15 for tightening one sandwiching plate (washer) 14 from the outside. The other sandwiching plate (stopper) 14 is fixed to the mounting rod 12. Here, the engaging portion 11
Engages with a dovetail groove 18 formed in a mounting tool 17 mounted at a predetermined position (a mounting position can be freely changed) of a metal tubular body 16 made of aluminum or the like for accommodating the vertical distance measuring rod 4. It is formed as a divergent protruding engagement body.

The vertical distance measuring rod 4 is formed by an insulating rod whose length is adjustable, and its lower end is arranged so that it can be housed in the metal cylinder 16. An insulating ball member 19 made of rubber or the like is fixed to the tip (upper end) of the vertical distance measuring rod 4. Further, a weight 20 (here, about 3.4 kg) is fixed to the lower end of the metal tubular body 16, and the center of gravity of the weight 20 is located in the lower part to maintain the vertical direction. Then, the mounting tool 17 is fixed to the upper part of the metal tubular body 16 by means such as screwing. Further, the mounting tool 17 is provided with an engaging portion 21 made of a divergent projecting engaging body for fixing the horizontal gap measuring rod 5.

Like the vertical distance measuring rod 4, the horizontal distance measuring rod 5 is formed of an insulating rod whose length is adjustable, and an insulating ball body 22 made of rubber or the like is fixed to the tip thereof. The horizontal gap measuring rod 5 has a weight 23 at its rear end portion, and an engaging member provided with a dovetail groove 24 for engaging with the engaging portion 21 of the mounting member 17 at its rear end side intermediate portion.
25 is installed. The engagement tool 25 includes an inclination angle adjusting unit 26 for adjusting the inclination angle of the horizontal distance measuring rod 5 and the vertical distance measuring rod 4. In addition, here, the measuring rods 4 and 5 are formed of extended type insulating rods, that is,
It is shaped like a fishing rod and can be extended in length.

In the crane vehicle of the present embodiment based on the above-described configuration, the boom 9 of the crane vehicle 1 swings the fixture 9 including the mounting rod 12, the sandwiching plates 14 and 14, and the nut 15 in the hole 8 thereof. The metal tube body 16 that is freely mounted and has the mounting tool 17 having the dovetail groove 18 fixed to the engaging portion 11 is attached to the dovetail groove 18
The horizontal distance measuring rod 5 is fixed to the engaging portion 21 of the mounting device 17 via the engaging tool 25 fixed to the horizontal distance measuring rod 5. And
After the vertical distance measuring rod 4 and the horizontal distance measuring rod 5 are extended and pulled out to the distance determined according to the transmitted power of the power transmission line 7 at the place where the mobile crane 1 performs the crane work, the crane work is started. .

After the crane work is started, the boom 2 of the crane moves up and down, but the vertical distance measuring rod 4 and the horizontal distance measuring rod 5 act so that their states are always kept horizontal and vertical. Check whether the crane 1 moves up and whether the insulating ball members 19 and 22 fixed to the tips of the vertical distance measuring rod 4 and the horizontal distance measuring rod 5 are located outside the power transmission line 7 by a predetermined distance. It works so that the driver of the car 1 and the operator can visually confirm it. In addition, boom 2 of mobile crane 1
In addition, the distance measurement and the distance confirmation can be easily performed only by mounting the vertical distance measuring rod 4 and the horizontal distance measuring rod 5.

By the way, in the above-mentioned embodiment, the measuring rod has been described as the horizontal distance measuring rod and the vertical distance measuring rod.
It may be used as a distance measuring rod in the tilt direction, or in combination with these,
As a matter of course, it may be configured to be used alone. Further, with regard to the engaging tool, the mounting tool, etc., those having a configuration appropriately changed according to the shape, size, etc. of heavy machinery such as a crane can be used. Further, when the construction of the mobile crane 1 is, for example, a small one, the boom 8 may not have the hole 8. Therefore, at this time, the fixture 26 as shown in FIGS. 8 and 9 is used. May be fixed to the boom 2 by a wearing tool such as a belt (hand) 27. Here, the attachment 26 is configured so that its attachment shaft 28 is rotated, and the vertical distance measuring rod 4 can be held, for example, in a vertical state at all times.

Further, in the above-described embodiment, the configuration in which the measuring rod is disposed at the boom tip portion has been described, but it may be disposed at the boom intermediate portion. Moreover, you may make it use the distance detection device which detects the induced voltage etc. from a power transmission line at the boom tip part, and measures the sense of distance. Then, the detection result may be detected visually or audibly by a buzzer, a lamp blinking or the like in the driver's seat or the like. Here, the detection sensor may be provided on a ball body or the like attached to the measurement rod. Furthermore, the surface of the measuring rod may be provided with a continuous pattern of red and white.

[Effect of device]

As is clear from the above description, according to the power transmission line approach warning tool for heavy machinery such as a crane of the present invention, the distance measuring rod has a weight at the rear end and a tip display member such as a ball at the tip. Since it is formed of an extension type insulating rod, the length of the distance measuring rod is arbitrarily extended or retracted by extending or retracting the insulating rod at an approach danger interval determined by the transmission power of the transmission line. And, it has an effect that it can be easily adjusted.

In addition, since the distance measuring rod is formed of an extension type insulating rod, when working at a place where the transmission line is not installed, the distance measuring rod is retracted to shorten its length. Thus, there is an effect that heavy machinery such as a crane can be used without removing the distance measuring rods one by one.

Further, the interval measuring rod is provided with a horizontal / vertical state holding portion capable of holding a horizontal state or a vertical state regardless of the vertical movement of the boom of a heavy machine such as a crane, and has a horizontal measuring rod and a vertical measuring rod, When both measuring rods are constructed so that they can be cross-attached, the distance measuring rods can be easily attached and the distance measuring rods are always held in a horizontal or vertical state, so that the distance measuring rods can be measured. It has an effect that the rod can be confirmed in a stable state.

Therefore, according to the present invention, a power line approach warning tool for cranes and other heavy machinery that can be easily attached to the boom of cranes and other heavy machinery and that can respond to the approach danger interval determined by the power transmission of the power transmission line is provided. It has the effect of being able to.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a perspective view, FIG. 2 (a) and (b) are partially enlarged views, and FIG. 3 is a front view of a vertical distance measuring rod, FIG. 4 is a front view of the fixture, FIG.
FIG. 6 is a plan view of the fixture, FIG. 6 is a front view of the horizontal gap measuring rod, and FIG. 7 is a front view for explaining the engagement state of the vertical gap measuring rod and the horizontal gap measuring rod. 8 and 9 show another embodiment of the present invention. FIG. 8 is a perspective view of a main part and FIG. 9 is a partially enlarged view. 1 ... Crane truck (heavy machinery), 2 ... Boom, 3 ... Boom tip, 4 ... Vertical distance measuring rod, 5 ... Horizontal distance measuring rod, 6 ... Measuring unit, 7 ... Sending Electric wire, 8 ……
Hole, 9 ... Fixture, 10 ... Screw, 11 ... Engagement part, 12 ...
Mounting rod, 13 …… Boom tip wall, 14 …… Clamping plate, 15 …… Nut, 16 …… Metal cylinder, 17 …… Mounting tool, 18 …… Dovetail, 19
...... Insulated ball body, 20 ...... weight, 21 ...... engagement part, 22 ......
Insulating ball body, 23 ... weight, 24 ... dovetail groove, 25 ... engaging tool

Claims (2)

(57) [Scope of utility model registration request] 1. A power line approach warning tool for a crane or other heavy equipment for rotatably attached to a boom of a heavy equipment such as a crane for visually confirming a dangerous distance between the boom and the power line. The warning tool has a weight at the rear end and a distance measuring rod formed by an extension type insulating rod having a tip display body such as a ball at the tip, and the insulating rod is extended or retracted,
A transmission line approach warning tool for heavy machinery such as a crane, wherein the length of the interval measuring rod can be adjusted to an approach danger interval determined by the transmission power of the transmission line. 2. The distance measuring rod has a horizontal measuring rod and a vertical measuring rod, both measuring rods can be cross-attached and are in a horizontal state or a vertical state regardless of vertical movement of a boom of heavy machinery such as a crane. The transmission line approach warning tool for heavy machinery such as a crane according to claim 1, further comprising a horizontal / vertical state holding portion capable of holding the state.