JPH06129597A - Proximity alarm device - Google Patents

Abstract

PURPOSE:To provide a proximity alarm device which raises notice certainly, can be installed and removed easily, and is suitable for works to be specified as a hazardous zone at any time. CONSTITUTION:A proximity sensor 5 to sense approach of any person, an alarm 7 to issue alarm in conformity to the sensing signal thus given, and a power supply for them are accommodated in a cylindrical case 2 which has a hollow at the axis part so that it can be mounted removably on a protrusion provided on a structure such as a steel tower, electric post, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proximity warning device for giving a warning to a person approaching a dangerous area, and in particular, it can certainly call attention, can be easily installed / removed, and a dangerous area can be set at any time. The present invention relates to a proximity warning device suitable for construction work.

[0002]

2. Description of the Related Art A transmission line has a plurality of arms 8 as shown in FIG.
A large number of electric wires 82 are installed on a steel tower 81 having three wires, and each electric wire belongs to two or more independent lines. Transmission line construction, including inspection of steel tower bolts and insulators, is carried out only on the stopped line by stopping the desired line among these lines.

Here, FIG. 9 exemplifies how a worker moves on a steel tower 81 in the construction of a transmission line.
First, the worker A uses the elevating step 61 planted along the legs 91 of the steel tower to climb above the steel tower from the ground (route a). The elevating step 61 of the leg portion 91 is usually provided only for one leg. In the steel tower arm 83a, the steel frame 9
It moves horizontally on 2 to reach the destination (the position of the worker B) (routes B to C). When moving to the next destination above this destination, return to the position of the ladder 93 (path C), climb the ladder 93 (path D), and move to the tower arm 83b.
It moves horizontally on the steel frame 92 (path E).

As described above, when a worker moves vertically and horizontally on the steel tower 81 to construct a power transmission line, it is necessary to distinguish between a line where electricity is stopped and a line where electricity is charged, which may lead to an accident. There is. In particular, when the power transmission line has an extremely high voltage, there is a possibility of electric shock without directly touching the power transmission line. Conventionally, as a measure against this, the charged line side is divided as a hazardous area, and in order to distinguish it, a net or rope is laid to prevent intrusion or a flag with "no entry" is displayed. A bar or similar sign is installed before the construction. In the case of steel towers, barred bars are often used as signs. In FIG. 9, among the steel tower arms, the steel tower arms 83a to 83c correspond to the side of the line where electricity is stopped, the steel tower arms 83d to 83f correspond to the line that is being charged, and the bases of the steel tower arms 83d to 83f are shown. The marker 16 is installed at the end and the elevating step 61b above the steel tower arm 83d.

FIG. 10 shows an example of a conventional sign 16. The out-of-limits section bar 101 shown in the figure comprises a bar 102 of an appropriate length, a flag 103 attached to the bar 102, and a mounting bracket 104, and the mounting bracket 10 is mounted on a steel frame 92 of a steel tower.
It is fixed through 4. Installation will be done prior to power line construction.

[0006]

By the way, in spite of all the measures described above, the worker C of FIG. , I'm constantly encountering accidents. After investigating past accident cases, 1. There was no sign.

2. Ignored the sign and entered the danger area.

3. The position of the sign was incorrect.

[0009] can be divided into the following examples. An accident has occurred even with the signs attached in this way, and further detailed analysis of the accident cases revealed that the signs were not noticeable in the following situations.

1. The sign was hidden and I couldn't see it while I was carrying goods.

2. Since it is a special work that requires high skill at high places, I lost the time to check the signs.

3. I lost sight because of my fatigue and missed the sign.

This is because the conventional sign appeals to the visual sense of the worker, and therefore the effect is reduced to half under the condition where the visual sense is difficult or when the mental and physical condition of the worker is weakened.

On the other hand, if a safety device that works actively is provided so that the safety device operates independently of the operator, the safety will be enhanced. For example, it is conceivable to use a proximity sensor that detects that a person is approaching as a safety device. As is well known, the proximity sensor has been widely used in various systems such as an infrared system, an ultrasonic system, an electromagnetic system, and an electrostatic system. In any of these methods, such a proximity sensor has a structure as shown in FIG. 11 and has various outer shapes. Commonly, fixtures (flange, screw, etc.) for fixing the proximity sensor 111 are commonly used. ) 112 is required. This is because a general-purpose proximity sensor is often fixed and used in one place.

There are some problems in adopting this proximity sensor as a proximity warning device in the dangerous area of the power transmission line construction. That is, the fixing tool has to be attached and detached every time construction is performed or each time the dangerous area is reset, which requires a lot of work in high places and is troublesome. Further, it is troublesome to arrange the power supply line of the proximity sensor, and there is a great risk of short circuit. Since conventional signs that rely on vision are also important and cannot be abolished, a proximity sensor will be installed side by side with the sign, increasing the amount of work.

Therefore, an object of the present invention is to solve the above-mentioned problems, to surely call attention, and to install / remove easily.
It is to provide a proximity warning device suitable for construction in which a dangerous area is set at any time.

[0017]

In order to achieve the above-mentioned object, the present invention is a cylindrical body having a hollow central portion so that it can be removably attached to a protrusion provided on a structure such as a steel tower or an electric pole. In the case formed in, a proximity sensor that detects the approach of the human body,
An alarm device for issuing an alarm based on this detection signal and a power supply for these are accommodated.

Alternatively, a proximity sensor for detecting the approach of a human body in a case formed in a cylindrical body having a hollow shaft center portion so as to be removably attached to a projecting portion provided on a structure such as a steel tower or a telephone pole. And a transmitter that transmits a radio signal in response to the detection signal and a power supply for these, and a receiver that receives the radio signal and an alarm that issues an alarm when the radio signal is received. A portable receiver housing the receiver may be provided.

The power source may be a solar cell provided outside the case.

The case may be attached to the lifting step.

The case may be formed to have a hexagonal column shape.

The power source may be a battery.

[0023]

With the above structure, when the human body approaches, the proximity sensor operates and issues an alarm, so that the operator notices the alarm even if he or she misses the sign. Therefore, invasion into the dangerous area is prevented.

The proximity alarm device has a case formed in the shape of a cylinder whose hollow center is hollow, and can be removably attached to a protrusion provided on a structure such as a tower or telephone pole. . Therefore, it is easy to install the product before construction or replace it by changing the dangerous area during construction. Further, since it can be attached only by inserting it into the exclusion-forbidden partition rod, it is easy to install it together with the installation of the exclusion-forbidden partition rod.

Further, since the case has a power source, it is not necessary to provide wiring, so that it is safe and easy to install. Moreover, if this power source is a solar cell, it is not necessary to replace the battery.

The case containing the proximity sensor and the transmitter is attached to the steel tower, while the portable receiver containing the receiver and the alarm device is carried by each worker, whereby the detection based on the proximity sensor is performed. The alarm can be sounded with a portable receiver. The alarm sounds right next to the worker, so you do not miss it.

Further, when the case of the proximity alarm device is attached to the elevating step, not only the function of the proximity sensor described above but also the case itself serves as a sign and physically functions to prevent the elevating.

When the case is formed in the shape of a hexagonal prism, the side surfaces are flat, so that the proximity sensor, the solar cell, etc. can be easily attached, and at the same time, they can be prevented from rolling during storage and transportation and can be easily stacked.

If the battery is used as the power source, the battery can be charged and used, so that consumable items such as dry batteries are not required and the batteries need not be replaced, and the waterproofness of the case can be improved.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the proximity alarm device 1 has a case 2 which is formed in a cylindrical body having a hollow central portion, and the opening diameter of this hollow portion 3 is normally used. It has a diameter that allows it to be loosely fitted to the off-limits bar or the lifting step. In this example, the case 2 has a cylindrical shape, a cylindrical hollow portion 3 is formed in the axial center portion, and an outer peripheral portion 4 and a surface thereof can accommodate a proximity sensor described later. As shown in the block diagram of FIG. 2, the proximity alarm device 1 includes a proximity sensor 5 that detects the approach of a human body, and an alarm device 7 that issues an alarm using the output of an oscillator 6 based on this detection signal. , And a power source 8 such as a dry battery, which are housed in the outer peripheral portion 4. In FIG. 1, 9 is a lid for replacing the dry battery for the power source 8.

Although the sensitive surface 10 of the proximity sensor is shown in FIG. 1 so as to occupy a part of the outer circumference of the cylinder, the sensitive surface may be provided over the entire outer circumference of the cylinder. The sensitivity of the proximity sensor 5 may be fixed, for example, 50 cm, 5
You may make it possible to set it variably like m.

Next, the operation of the embodiment will be described.

At the time of construction of the power transmission line, the proximity alarm device 1 is installed along with the installation of the sign of the dangerous area. As shown in FIG. 3, the installation is carried out in the hollow portion 3 of the case 2 by the exclusion bar 11
Can be done at the same time by inserting. That is, flag 1
The rod 13 to which 2 is attached is inserted into the case 2 and fixed to the steel frame 14 with the attachment fitting 15. As a result, the sign 16 and the proximity warning device 1 are in the same place. This location may be the same as the installation location described in FIG. The operator misses the sign 16 and enters the route to the proximity warning device 1
When it comes close to, the proximity sensor 5 generates a detection signal, the oscillation of the oscillator 6 is transmitted to the alarm device 7 by this detection signal, and the alarm device 7 makes a sound. The sound of the alarm device 7 draws the attention of the operator, and by checking the sign 16, it is possible to avoid entering the dangerous area.

Another embodiment will be described.

In an example in which a portable receiver is provided, FIG.
The case 2 having the hollow portion 3 and the outer peripheral portion 4 is used as in the above embodiment shown in FIG. 4A, and the portable receiver 41 shown in FIG. 4B is used. Portable receiver 4
The shape of 1 is small and thin so that it can be stored in a pocket or the like. A block diagram of each is shown in FIG. The case 2 includes a proximity sensor 5 and an oscillator 42 that oscillates a radio signal according to a detection signal of the proximity sensor 5.
And a transmitter 43 for transmitting the same and a power supply 8 for them are housed, and the portable receiver 41 has a receiver 44 for receiving the radio signal and an oscillator 45 for receiving the radio signal. An alarm device 46 that is driven to generate an alarm and a power source 8 are housed.

The case 2 is provided at various places along with the sign 16, and the portable receiver 41 is distributed to each worker. One portable receiver 41 can be sounded from any case 2, and any portable receiver 41 can react to one case 2.

In this example, when one person approaches a dangerous area somewhere, an alarm sounds at the portable receivers 41 of all of the workers, so that the workers can call and confirm each other. Of course, individual warnings can be obtained by weakening the radio waves.

When a radio signal is used as in this example, the case 2 may be made of an insulator.

Next, FIG. 7 collectively shows an example in which a solar cell is used as a power source, an example in which a battery is used, and an example in which the case has a hexagonal column shape. First, as shown in FIG. 7A, the case 2 is formed in a hexagonal cylinder shape and has a hollow portion 3. A transparent window 71 is provided on each side surface, and each transparent window 7
The solar cell 72 is arranged so as to face 1. Further, the proximity sensor 5 is an optical sensor, and has a sensitive surface (light receiving surface) 10
Is also provided on the side. A lens 73 is attached to the side surface provided with the proximity sensor 5.

In this embodiment, since the solar battery 72 is used as the power source 8, there is no need to replace the battery, which is economical and simple. The solar cell 72 is arranged on each side surface, and the case 2 can be freely attached in any direction without worrying about the direction of the sun. In addition, since it is not necessary to replace the battery, there is no lid or the like for battery replacement, and the structure is completely waterproof. And the lens 73
Since the change in light due to the movement of the object is emphasized and transmitted to the proximity sensor 5, the sensitivity performance is enhanced. Also, the lens 73
Has a function of expanding the directivity of the proximity sensor 5, so that a wide angle range can be detected.

Further, since the case 2 is formed in the shape of a hexagonal cylinder, it is convenient to arrange the planar solar cell 72. Further, due to this shape, it does not roll during storage and transportation. Further, since the side surface is flat, the lens 73 can be easily attached. Further, as shown in FIG. 7 (c), a plurality of proximity sensors 5 and lenses 73 can be attached at different angles, and a wider angle range can be detected. Of course, the case 2 may be cylindrical as shown in FIG. 7B, or the entire outer circumference of the case 2 may be transparent.

A rechargeable battery 74 is mounted as the power source 8 in the case 2 of FIG. 7 (c). The charging electrode 75 of the battery 74 is provided on the axial end surface of the case 2. In this example, since it is not necessary to replace the battery, an opening / closing part such as a lid for replacing the battery is eliminated and the structure is waterproof. Even when a battery is used, of course, the case 2 may have a cylindrical shape as shown in FIG. 1, in which case the lid 9 for replacing the battery in FIG. 1 is eliminated and the charging electrode 75 is provided instead, and the case shown in FIG. The power source 8 becomes the battery 74. When a battery is used, it is charged when it is not used, such as during storage. It goes without saying that the battery has a capacity enough to operate during the construction period.

Next, FIG. 6 shows an example in which the case 2 is attached to the elevating step 61.

The case 2 of FIG. 6 is formed such that its axial length fits within the lifting step 61 provided on the leg portion 91 of the steel tower. Therefore, the mounting is completed only by ascending the elevating step 61 with the case 2 and hanging the hollow portion 3 on the elevating step 61 at a desired position. In this way, the case 2 can be attached and detached very easily. Moreover, the proximity warning device 1 not only functions as a proximity sensor, but the case 2 itself acts as the marker 16 and is almost never overlooked by an operator climbing the elevating step 61. Further, since the ascending / descending step 61 is hidden in the case 2, it is impossible to further climb, and it works to physically prevent the ascending / descending.

Since the ascending / descending step 61 is a route which always passes when moving up and down the tower, it is not necessary to provide the proximity warning device 1 (also serving as the marker 16) from an unintended wraparound route. It also has the effect that there is no possibility of intrusion and the number of installation locations can be reduced.

In each of the above embodiments, the outer shape of the case 2 is a cylinder or a hexagonal cylinder, and the hollow portion 3 is a cylinder. However, each shape has a circular or elliptical cross section.
It is possible to use a combination of shapes such as a semicircular quadrangle and a hexagon.

Further, the proximity alarm device 1 of the present invention is not limited to being used for power transmission line construction, but is also applicable to general construction work, power generation / transformation /
It can be applied to all general works such as power distribution and communication equipment work. It can also be applied to crime prevention equipment, not as construction safety equipment. For example, by utilizing the hollow part 2, it can be attached to a convenient existing rod, pipe, rope, etc.,
This is extremely easy and convenient for safety equipment and crime prevention equipment installed temporarily.

[0049]

The present invention exhibits the following excellent effects.

(1) A visual sign may be overlooked, but since the present invention uses hearing, attention can be surely drawn.

(2) Since the approach of a person is detected by the function of the proximity sensor, it is reliable without being overlooked due to carelessness and fatigue like a person.

(3) The hollow part can be installed simply by passing it through a rod,
No wiring is required, so installation and removal are easy and work efficiency is improved.

(4) Since it can be easily installed anywhere,
The setting location can be changed at any time, and there are many applications.

[Brief description of drawings]

FIG. 1 is an external view of a case of a proximity warning device showing an embodiment of the present invention.

FIG. 2 is an internal block diagram of the proximity warning device of the present invention.

FIG. 3 is an external view showing the proximity alarm device of the present invention mounted on an exclusion zone bar.

FIG. 4 is an external view of a case and a portable receiver of a proximity warning device according to another embodiment of the present invention.

FIG. 5 is an internal block diagram of a case and a portable receiver of a proximity alarm device according to another embodiment of the present invention.

FIG. 6 is an external view showing the proximity warning device of the present invention mounted on a lifting step.

FIG. 7 is a front view and a side view of a case showing another embodiment of the present invention.

FIG. 8 is an external view of a power transmission line.

FIG. 9 is an explanatory diagram showing a movement path of a worker on a steel tower.

FIG. 10 is an external view of a sign showing a conventional example.

FIG. 11 is an external view of various conventional proximity sensors.

[Explanation of symbols]

 2 Case 5 Proximity sensor 7 Alarm device 8 Power supply

Claims (6)

[Claims] 1. A proximity sensor for detecting the approach of a human body in a case formed in a cylindrical body having a hollow shaft center so as to be removably attached to a protruding portion provided in a structure such as a steel tower or a telephone pole. A proximity alarm device comprising: an alarm device for issuing an alarm based on the detection signal; and a power supply for these alarm devices. 2. A human body is approached to a case made of an insulator formed in a cylindrical shape having a hollow central portion so as to be removably attached to a protrusion provided on a structure such as a steel tower or a telephone pole. A proximity sensor for detecting, a transmitter for transmitting a radio wave signal in response to the detection signal, and a power supply for these are accommodated, and on the other hand,
A proximity alarm device comprising a portable receiver that accommodates a receiver that receives the radio signal and an alarm that issues an alarm when the radio signal is received. 3. The proximity alarm device according to claim 1, wherein the power source is a solar cell provided outside the case. 4. The proximity warning device according to claim 1, wherein the case is attached to an elevating step. 5. The proximity warning device according to claim 1, wherein the case has a hexagonal prism shape. 6. The proximity alarm device according to claim 1, wherein the power source is a battery.