JPH08297784A - Division net - Google Patents

Abstract

PURPOSE: To prevent a person and a vehicle from intruding and an accident from occurring by generating a signal by detecting the deformation of a net and mounting the sensor of an abnormality alarm device from which an alarm is issued based on a detection signal on the net. CONSTITUTION: A flexible net main body 6 is mounted on a flexible edge rope 5, and it is spread by binding with a fixed rope 8. The sensor 3 is to generate the detection signal by detecting the deformation of the net 1, and it is mounted on the net 1. A signal processor is connected electrically to the sensor 3, and generates an alarm signal corresponding to the detection signal from the sensor 3. An alarm device 2 is connected electrically to the signal processor, and issues the alarm corresponding to the alarm signal from the signal processor. By employing such constitution, when the net 1 is deformed due to an external stimulus, the deformation is detected by the sensor 3, and the detection signal is issued. The alarm device 2 issues the alarm based on the signal, and it is informed to a principal and another person, which prevents intrusion and the accident from occurring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partition net for partitioning a work place or a dangerous area and preventing accidents.

[0002]

2. Description of the Related Art Conventionally, in areas such as power stations such as power stations, substations, and switchyards, various work areas and dangerous areas are surrounded by partition nets to prevent personal injury or equipment accidents due to intrusion. I'm out.

A conventional partition net is composed of a red and white net body made of synthetic fiber and an edge rope. The partition net is used by being tied to a dedicated support stand, an iron structure, a structure or the like with a fixed rope.

Further, an automatic warning generating device shown by a microfilm of Japanese Utility Model Application No. 62-103374 (Japanese Utility Model Application Laid-Open No. 64-10896) is conventionally known. This is because the main body case is attached to the upper end of the support stand, and a sensor that outputs a detection signal by detecting a person approaching a dangerous area inside the main body case and a warning device that outputs a detection signal from the sensor are issued. This device is installed in the vicinity of the dangerous area, and there are sensors that emit electromagnetic waves and detect it by its reflection state and those that detect infrared rays and detect human body temperature and heat rays emitted from clothes. It is shown.

[0005]

In the conventional divisional net consisting of red and white nets, it is possible to visually recognize the work area or the dangerous area to some extent clearly, but the warning power is poor, and the net is violated by unconsciousness, misidentification, negligence or intentionally It may be pulled out or removed and intruded, and even if there is a collision accident on the net due to vehicles, equipment, etc., there are cases where the people concerned do not notice.

In the conventional automatic warning generating device, the sensor is provided in the main body case of the support stand and is installed in the vicinity of the dangerous area, and it is only a local detecting means, and the detecting area is narrow, so that the work place and the dangerous area are dangerous. When the area is wide, a large number of devices and installation labor are required, and the cost is high.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a sensor of an abnormality warning device in which a deformation of a flexible net is detected to generate a detection signal, and a warning device issues a warning based on the detection signal is used as the net. It is characterized by being attached to.

[0008]

[Operation] When an external stimulus such as a person crossing the net or a vehicle collides with the net, the net is deformed. The sensor detects this and outputs a detection signal. Based on this detection signal, a warning device gives a warning to notify the person and others. As a result, intrusion and accidents can be prevented.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, reference numeral 1 is a net, and the net 1 in the present embodiment is for various worksites or hazardous areas such as the premises of electrical stations such as power generation / substations, switchyards, etc. A flexible net rope 6 is attached to a flexible edge rope 5, specifically a synthetic fiber net body 6 colored red and white, and the supporting stands 7, 7 as shown in the figure. -A steel structure, a structure or the like (not shown) is tied with a fixed rope 8 and stretched. Reference numeral 4 is an abnormality warning device, which is configured by electrically connecting a sensor 3, a signal processor 9, and a warning device 2 described later. The sensor 3 is a sensor that detects deformation of the net 1 and generates a detection signal, and is attached to the net 1. The signal processor 9 is electrically connected to the sensor 3 and generates a warning signal in response to a detection signal from the sensor 3. The warning device 2 is electrically connected to the signal processor 9 for signal processing. A warning device that issues a warning in response to a warning signal from the device 9. The signal processor 9 and the warning device 2 are provided in the installation position of the net 1 or in the field box 10 provided in the vicinity thereof. Specifically, the site box 10 is attached to the upper end of the stand 11 shown by the solid line in FIG. 1 or the support stand 7 shown by the phantom line, or the above-mentioned steel structure or structure.

In another embodiment, the warning device 2 is provided at a position remote from the net 1 such as an equipment operation monitoring station or a work office, that is, a remote position. In this case, the site box 1 is provided.
Transfer device 12 for transmitting a warning signal from signal processor 9 to 0
Is electrically connected to the signal processor 9, and is provided with a remote box 13 provided at a remote location for receiving the warning signal. A receiver 14 electrically connected to the receiver 14 is provided. A warning device 2 for issuing a warning in accordance with a warning signal from the electric wire 1 is provided.
5 are electrically connected.

As another embodiment, there is also an example in which a transfer device 12 for transmitting a warning signal by radio waves and a receiver 14 for receiving the radio waves are wireless type instead of the wired type as described above. Reference numeral 26 is a transmitting antenna of the wireless transfer device 12, and reference numeral 36 is a receiving antenna thereof. Further, a plurality of the warning devices 2 may be provided, for example, both in the installation site of the partitioned net, in the vicinity thereof and in the remote place, and specifically, may be provided in both the site box 10 and the remote box 13, in which case The warning signal from the signal processor 9 is output to the warning device 2 and the transfer device 12 of the field box 10, and the warning signal is sent to the warning device 2 of the remote box 13 via the transfer device 12 and the receiver 14. You may make it output.

Whether the warning device 2 is provided in the field box 10 or the remote box 13,
It may be a visible signal means 16 such as an indicator lamp or an audible signal means 17 such as a speaker, or may be provided with both the visible signal means 16 and the audible signal means 17.

Next, each embodiment of the sensor 3 will be described. FIG.
Uses the sensor 3 as the cable sensor 30, and the cable sensor 30 is attached to the signal processor 9 along both or one of the upper and lower edge ropes 5 and 5 with an attaching member 35 such as an insulating adhesive tape or an insulating cord. It is electrically connected. In addition, as shown by the broken line in FIG. 1, one or a plurality of cable sensors 30 may be attached in the longitudinal or lateral direction of the net body 6.

More specifically, the cable sensor 30 is an optical fiber cable 30A as shown in FIG.
The light emitting element 18 that outputs light to the optical fiber cable 30A is connected to the incident end of the optical fiber cable 30A, and the change in the refractive index of light when the net 1 is deformed is detected and a detection signal is sent to the signal processor 9. Output light receiving element 1
9 is connected to the emission end.

FIG. 5 shows an embodiment in which the cable sensor 30 is a coaxial cable 30B. This is a coaxial cable 30B which generates a detection signal in accordance with a frictional current generated when the net 1 is deformed. Insulation pipe 22 having
A core wire 23 is inserted in the center of the, and an external conductor 25 is interposed between the insulating pipe 22 and the insulating coating 24.
When the net 1 is deformed and vibration occurs, the core wire 23 slides in the axial direction as indicated by the arrow to generate a friction current, and this friction current generation type coaxial cable 30B is a signal. It is electrically connected to the processor 9.

FIG. 6 shows the sensor 3 as a mechanical switch 31 or a strain resistance element 32. In the case of the mechanical switch 31, a pair of upper and lower contacts 28, 28 are provided in an insulating case 27 as shown in FIG. The coil spring 20 in which the electric wires 29, which are normally opposed to each other with a predetermined interval and whose one end is connected to each contact 28, are interposed between the contact 28 and the insulating case 27.
And a plurality of such mechanical switches 31 are arranged with a space therebetween, and each of the electric wires 21 stretched along the upper and lower edge ropes 5 by the mounting member 35. The other end of the electric wire 29 is connected, and the sensor 3 including the mechanical switch 31 is electrically connected to the signal processor 9 via the electric wires 29 and 21. The mechanical switch 31 outputs a detection signal to the signal processor 9 when the upper and lower edge ropes 5 and 5 approach each other due to the deformation of the net 1 and the contacts 28 and 28 close and conduct. .

FIG. 8 shows that the sensor 3 is a strain resistance element 32. The strain resistance element 32 issues a detection signal according to the variation amount of the strain resistance element which is reduced by the deformation of the net 1. Within 27, the strain resistance element 32 is connected to the electric wires 29, 29 stretched in the vertical direction so as to attract each other in the vertical direction. Other configurations are the same as those of the mechanical switch 31 described above as shown in FIG. 6, and detailed description thereof will be omitted.

FIG. 9 shows that the sensor 3 is composed of a transmitter 33 which is mounted on the net 1 at a predetermined interval and is opposed to each other, and a receiver 34 which receives a transmission signal from the transmitter 33. One pair or a plurality of pairs of upper and lower transmitters 33 and receivers 34 are connected to the electric wires 21, 21 attached by the above-mentioned attaching member 35 along the upper and lower edge ropes 5, 5, and the lower electric wire 21 is used. The receiver 34 is electrically connected to the signal processor 9. This transmitter 33
In the sensor 3 including the receiver 34 and the receiver 34, the receiver 34 detects that the received signal fluctuates due to the deformation of the net 1 and that the transmitted signal is not received.
Is output to

Specific examples of the sensor 3 including the transmitter 33 and the receiver 34 include an optical sensor, an infrared sensor, a microwave sensor, an ultrasonic sensor, and a magnetic sensor. In the case of the optical sensor, the transmitter 33 is a projector. An optical receiver is used as the receiver 34, an infrared projector is used as the transmitter 33 in the case of an infrared sensor, an infrared receiver is used as the receiver 34, and a transmitter is used as the transmitter 33 in the case of a microwave sensor and an ultrasonic sensor. A receiver is used as the child 34, a magnet is used as the transmitter 33 in the case of a magnetic sensor, and a magnetic field sensor is used as the receiver 34.

The operation of each embodiment will be described. When the sensor 3 is the optical fiber cable 30A, the light from the light emitting element 18 is always sent to the light receiving element 19. If there is an intrusion from the net 1 or a collision with the net 1, the flexible net 1 is deformed as shown by the phantom line in FIG. 1, and the optical fiber cable 30A is deformed along with the deformation of the net 1, The refractive index of light in the optical fiber cable 30A changes. The light receiving element 19 converts the change in the refractive index of the light into a detection signal according to the change amount, and outputs the detection signal to the signal processor 9. The signal processor 9 compares the detection signal with a reference signal, converts the detection signal into a warning signal and outputs the warning signal to the warning device 2, and the warning device 2 issues a warning.

In the case where the sensor 3 is the coaxial cable 30B, when the net 1 is deformed and vibrates due to intrusion and collision, the core wire 23 slides in the axial direction and a friction current is generated. This friction current is output to the signal processor 9 as a detection signal, and when the detection signal reaches a predetermined value in the signal processor 9, it is converted into a warning signal and output to the warning device 2, and the warning device 2 warns. Emit.

When the sensor 3 is the mechanical switch 31, when the upper and lower edge ropes 5 and 5 approach due to intrusion and collision, the upper and lower electric wires 29 and 29 approach and the coil spring 20 extends, and the contacts 28 and 28. Come into contact and conduct. The detection signal generated by the conduction is output to the signal processor 9, the signal processor 9 converts the detection signal into a warning signal and outputs the warning signal to the warning device 2, and the warning device 2 issues a warning.

In the case where the sensor 3 is the strain resistance element 32, the strain resistance element 32 is always pulled by the upper and lower electric wires 29, 29 to cause strain. When the upper and lower edge ropes 5 and 5 come close to each other due to intrusion and collision, the strain resistance element 3
The strain due to the tension of 2 decreases or disappears. This variation in the amount of distortion is detected and output to the signal processor 9 as a detection signal, the signal processor 9 compares the detection signal with a predetermined reference signal, and when it is greater than or equal to the reference value, it is converted into a warning signal, It outputs to the warning device 2, and the warning device 2 issues a warning.

When the sensor 3 is composed of a transmitter 33 and a receiver 34, the transmitter 33 always transmits a transmission signal,
The receiver 34 is set to receive this. When the net body 6 is deformed as shown in FIG. 10 due to intrusion or collision, for example, the upper edge rope 5 is lowered and the upper and lower edge ropes 5 and 5 approach, the received signal fluctuates more than usual, and FIG. When the lower part of the net 1 is bent and the transmitter 33 and the receiver 34 deviate from the facing position as shown by, the receiver 34 does not receive the transmission signal. The receiver 34 detects the variation of the received signal and the fact that the transmitted signal is no longer received, and outputs the detected signal to the signal processor 9. In the signal processor 9, the detection signal is compared with the reference value, and if it is different from the reference value,
That is, a warning signal is output to the warning device 2 when the value is equal to or greater than the reference value and equal to or less than the reference value, and the warning device 2 issues a warning.

When the sensor 3 including the transmitter 33 and the receiver 34 is an optical sensor, an infrared sensor or a microwave sensor which sends out an electromagnetic wave as a transmission signal, the transmitter 33 is a projector, an infrared projector or a transmitter. Light, infrared light, or microwave, which is an electromagnetic wave, is always sent from the wave device, and is received or received by the light receiver, the infrared light receiver, or the wave receiver that is the receiver 34. And intrusion,
When the net 1 is deformed as shown in FIG. 10 due to a collision, the level of the light flux, the infrared light flux, or the microwave changes, so that the receiver 34, the infrared receiver, or the wave receiver changes according to the variation amount. When the net 1 is deformed as shown in FIG. 11, it is detected that the receiver 34 does not receive or receive the light flux, the infrared light flux, or the microwave, and the detected signal is used as a detection signal. The signal is output to the signal processor 9, and as described below, the warning is issued by the warning device 2 through the comparison with the reference value and the output of the warning signal.

Similarly, when the sensor 3 including the transmitter 33 and the receiver 34 is an ultrasonic sensor, ultrasonic waves are constantly sent from the transmitter 33 and the receiver 34. If the net 1 is received and deformed due to intrusion or collision as shown in FIGS. 10 and 11, the receiver 3
Detecting that the ultrasonic wave receiver, which is 4, changes the level of ultrasonic waves and stops receiving ultrasonic waves, issues a warning through the output of the detection signal, the comparison with the reference value, and the output of the warning signal as described above. .

Similarly, when the sensor 3 including the transmitter 33 and the receiver 34 is a magnetic sensor, a magnetic field is generated by a magnet which is the transmitter 33, and a magnetic field sensor which is the receiver 34 senses the magnetic field. , As shown in FIGS. 10 and 11, when the net 1 is deformed due to intrusion or collision, the receiver 3
The magnetic field sensor 4 detects that the magnetic field strength has fluctuated and no longer senses the magnetic field, and outputs a detection signal, a comparison with a reference value, and outputs a warning signal to issue a warning as described above.

The sensor 3 of each of the above embodiments is turned on.
Except for the mechanical switch 31 which is an off switch,
Since the deformation of the net 1 is detected as each fluctuation amount, that is, as a so-called continuous change, the sensitivity adjustment in the signal processor 9 is possible.

In the case of the embodiment in which the warning device 2 is provided in the field box 10, the visual signal means 16, for example, a display such as blinking of an indicator light, is displayed near the net 1, and the audible signal means 17 such as a speaker. Makes an alarm. In the case of the embodiment in which the warning device 2 is provided in the remote box 13, the warning signal output from the signal processor 9 to the transfer device 12 in the field box 10 is remote from the transfer device 12 via the electric wire 15 or the radio wave. The warning is transmitted to the receiver 14 of the box 13, and the warning device 2 issues a warning in response to the warning signal from the receiver 14. When the warning devices 2 and 2 are provided in both the field box 10 and the remote box 13, both the far and near warning devices 2 and 2 give a warning by both of the above actions. The warning is issued by at least one of the visual signal means 16 such as an indicator lamp and the audible signal means 17, as described above.

[0030]

According to the invention of claim 1, unlike the case of the conventional red and white net, a warning is issued when there is an intrusion or a collision, so that the alerting power is large, and the person himself or a person concerned can be alerted. It is easy for others to notice, it is easy to prevent accidents, and the sensor is attached to the flexible net itself, so it is possible to reliably detect the deformation of the net that occurs when an intrusion or collision occurs, and the conventional stand-type automatic warning Compared to the generator, only a small number of sensors need to be attached to the net, so that it is not necessary to arrange a large number of abnormality warning devices, the installation work is easy, and the device can be provided at low cost.

According to the second aspect of the present invention, the attachment to the net can be made extremely easy, the deformation of the net is directly transmitted, the detection sensitivity is good, and the variation of the cable sensor due to the deformation of the net is small. Since it is a continuous fluctuation, the sensitivity can be adjusted, and there is no external influence such as electromagnetic waves and temperature.

According to the invention of claim 3, it can be provided at a lower cost, can be easily attached to the net, and is not affected by external factors such as electromagnetic waves and temperature.

According to the invention of claim 4, the attachment to the net can be facilitated, and the variation of the strain resistance element is continuous variation, and the sensitivity can be adjusted.

According to the invention of claim 5, the fluctuation of the received signal is a continuous fluctuation, and the sensitivity can be adjusted.

According to the invention of claim 6, when an abnormality occurs, it is possible to immediately deal with it by a supervisor or the like, and it is possible to prevent the accident more reliably.

According to the invention of claim 7, an abnormal situation can be surely known.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of a partitioned net according to the present invention.

FIG. 2 is a block diagram of an abnormality warning device used in the above-mentioned partitioned net.

FIG. 3 is a partially enlarged front view showing a main part of the embodiment of the present invention.

FIG. 4 is an explanatory diagram of an optical fiber cable used in an embodiment of the present invention.

FIG. 5 is a partially enlarged front view in which a part of a coaxial cable used in another embodiment of the present invention is cut away.

FIG. 6 is a partial front view showing an essential part of an embodiment in which the sensor of the present invention is a mechanical switch or a strain resistance element.

FIG. 7 is an enlarged sectional view of the mechanical switch of the above.

FIG. 8 is an enlarged cross-sectional view showing a usage state of the strain resistance element.

FIG. 9 is a partial front view showing a main part of another embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along the line AA of the above.

FIG. 11 is a plan view of the above.

[Explanation of symbols]

 1 Net 2 Warning Device 3 Sensor 4 Abnormality Warning Device 16 Visible Signal Means 17 Audible Signal Means 30 Cable Sensor 31 Mechanical Switch 32 Strain Resistance Element 33 Sender 34 Receiver 34

Claims (7)

[Claims] 1. A sensor of an abnormality warning device, which detects a deformation of a flexible net, generates a detection signal, and causes a warning device to issue a warning based on the detection signal, is attached to the net. Partition net. 2. The compartment net according to claim 1, wherein the sensor is a cable sensor. 3. The compartment net according to claim 1, wherein the sensor is a mechanical switch. 4. The partition net according to claim 1, wherein the sensor is a strain resistance element. 5. The sensor sets a predetermined interval on the net,
Moreover, the partitioned net according to claim 1, comprising a transmitter attached to face each other and a receiver for receiving a transmission signal from the transmitter. 6. The partition net according to claim 1, wherein a warning device is provided at a remote position. 7. The partition net according to claim 1, wherein the warning device is at least one of a visual signal means and an audible signal means.