JP2022062324A - Safety management system for high place work - Google Patents

Abstract

To provide a safety management system for a high place work, by which the high place work can be safely performed by not forgetting to hook a safety belt when working at the high place.SOLUTION: In a safety management system 1 for a high place work, it is determined whether or not an operator is at a height higher than a predetermined height above a reference height based on a difference between a detected value of atmospheric pressure output from an operator (slave unit)-side atmospheric pressure sensor 21 and a detected value of atmospheric pressure output from a reference atmospheric pressure sensor 30 of a master unit. If it is determined that the operator is in a high place and the hook state detection sensor 20 detects that the hook is not in the state of being hooked on a fall prevention member, a notification unit (display unit 40, speaker 42) is caused to notify that it is in an unsafe state.SELECTED DRAWING: Figure 3

Description

The present invention relates to an aerial work safety management system used in, for example, construction work, maintenance, maintenance and inspection work of various buildings.

For example, Patent Document 1 discloses a maintenance / inspection support system used in maintenance / inspection work of an elevator. The maintenance and inspection support system of Patent Document 1 includes a mobile terminal owned by a maintenance worker, and the mobile terminal has a built-in barometric pressure sensor. According to this maintenance and inspection support system, the difference in altitude between the position of the mobile terminal and the reference floor is determined by the difference between the atmospheric pressure value detected by the pressure sensor and the atmospheric pressure value on the preset reference floor. If the difference in altitude is less than or equal to a predetermined value, the display device is configured to display a message informing the display device that maintenance and inspection work will be performed by moving the car to the reference floor.

Further, Patent Document 2 discloses an aerial work platform estimation device. This aerial work platform estimation device is also equipped with a mobile terminal owned by the worker. The mobile terminal has a built-in barometric pressure sensor and an acceleration sensor. The high-altitude work estimation device acquires atmospheric pressure information indicating the atmospheric pressure information of the place where the operator is located by the atmospheric pressure sensor, and when the difference between the acquired atmospheric pressure information and the reference atmospheric pressure exceeds a predetermined threshold value, the operator It is determined that the worker is at a high place, and if the threshold value is not exceeded, it is determined that the worker is not at a high place. Further, the aerial work platform estimation device determines whether or not the worker is performing the work based on the acceleration information acquired by the acceleration sensor. Then, only when the worker is in a high place and the work is being carried out, warnings such as alerts and vibrations are output to the mobile terminal and the supervisor terminal.

JP-A-2017-165521 Japanese Patent No. 6648863

By the way, in the construction work, maintenance, maintenance and inspection work of various buildings, there are many situations where aerial work is required. Generally, workers wear safety belts, but they cannot prevent a crash in the unlikely event that they do not hook them when working at heights.

In this regard, in Patent Document 1, the difference in altitude between the position of the mobile terminal and the reference floor is detected by the barometric pressure sensor built in the mobile terminal possessed by the maintenance staff, but the detection result is simply that of the car. It was only used to control the display device to display a message announcing the movement or maintenance and inspection work, and was not used to prevent a crash.

Further, in Patent Document 2, since a warning is output only when the worker is in a high place and the work is being carried out, the hook of the safety belt is hung on a handrail or the like to correctly perform the work in the high place. However, the warning will be output one by one, and it is possible that the warning will be annoying. In addition, in Patent Document 2, when the worker is not moving, the acceleration becomes 0, so that it is determined that the work is not performed, and as a result, the warning is not output even if the worker is in a high place. However, even if the worker is not working, he / she must hook the safety belt if he / she is in a high place, and in such a case, the device of Patent Document 2 cannot handle it.

The present invention has been made in view of this point, and an object of the present invention is to make sure that the hook of the safety belt is not forgotten when working at a high place so that the work at a high place can be performed safely. ..

In order to achieve the above object, the first invention is provided on the hook of the safety band in the height work safety management system for managing the worker who wears the safety band and performs the work at a high place. A hook state detection sensor that detects whether or not the hook is hooked on the fall prevention member that prevents the fall, and a large worker side that is attached to the worker and detects the atmospheric pressure around the worker. The pressure sensor and the worker-side atmospheric pressure sensor are configured separately, and are arranged at a reference height that serves as a reference when determining whether or not the worker is at a high place. The control unit includes a reference atmospheric pressure sensor for detecting the pressure, a notification unit for notifying that the worker's work at a high place is in an unsafe state, and a control unit for controlling the notification unit. The control unit is the operator. Based on the difference between the detected value of the atmospheric pressure output from the side atmospheric pressure sensor and the detected value of the atmospheric pressure output from the reference atmospheric pressure sensor, the operator sets the height higher than the specified height by a predetermined value or higher. If it is determined whether or not the operator is in a high place, and the hook state detection sensor detects that the hook is not in a state of being hooked on the fall prevention member, it is not possible. It is characterized in that it is configured to notify the notification unit that it is in a safe state.

According to this configuration, when the worker wearing the safety band is in a high place (for example, 2 m or more from the reference height), the value of the atmospheric pressure output from the worker side atmospheric pressure sensor is the reference height. It becomes lower than the value of the atmospheric pressure output from the reference atmospheric pressure sensor arranged in, and the control unit can determine that the worker is in a high place based on this difference. Further, whether or not the hook of the safety belt is hung on a fall arrest member such as a handrail or a rope is detected by the hook state detection sensor. If the worker is at a high place but the hook of the safety belt is not hooked on the fall arrest member, it can be said that the worker's work at a high place is unsafe. In this case, the control unit can notify the notification unit that the aerial work by the operator is in an unsafe state, and, for example, notify the supervisor, the manager, or the like. This allows the operator to be careful to correct the unsafe condition. In addition, the notification unit can notify the worker himself that the unsafe state is in the unsafe state, and in this case as well, the unsafe state can be corrected and the work at a high place can be performed safely.

The second invention is characterized in that the worker-side atmospheric pressure sensor and the hook state detection sensor are provided on the hook. According to this configuration, the atmospheric pressure sensor on the worker side and the hook state detection sensor can be combined to make the size compact.

The third invention comprises a slave unit having the worker-side atmospheric pressure sensor and the hook state detection sensor, a master unit having the reference atmospheric pressure sensor and the control unit, and an administrator terminal having the notification unit. The slave unit is provided with a slave unit-side transmission unit that transmits the detection value of the atmospheric pressure output from the worker-side atmospheric pressure sensor and the detection result of the hook state detection sensor. Is a master unit side receiving unit that receives the detection value of the atmospheric pressure transmitted from the slave unit side transmitting unit and the detection result, and a parent that outputs a control signal of the notification unit output from the control unit. A machine-side transmission unit is provided, and the administrator terminal is provided with an administrator-side reception unit that receives the control signal transmitted from the master unit-side transmission unit.

According to this configuration, by installing and fixing the master unit at the installation location, it is possible to accurately detect the height change of the slave unit. When the worker is in a high place and the hook is not hooked on the fall prevention member, the administrator can be notified of this. As a result, it is possible to accurately instruct the worker to correct the unsafe condition.

In a fourth aspect of the invention, the slave unit includes a first slave unit and a second slave unit, and the first slave unit and the second slave unit are communicably connected to a single master unit. The master unit has a detection value of the worker-side atmospheric pressure sensor of the first slave unit and a detection value of the reference atmospheric pressure sensor of the master unit at the time of setting performed before the operation of the high-altitude work safety management system. The first offset value, which is the difference between the two, and the difference between the detection value of the worker-side atmospheric pressure sensor of the second slave unit and the detection value of the reference atmospheric pressure sensor of the master unit at the time of system setting. The control unit includes a storage unit that stores two offset values, and the control unit applies the first offset value and the second offset value stored in the storage unit to determine whether or not the worker is in a high place. It is characterized in that it is configured to determine.

According to this configuration, it is possible to determine whether or not the worker is at a high place by using the difference between the worker-side atmospheric pressure sensor and the reference atmospheric pressure sensor, so that the determination result is accurate.

In the fifth invention, the first offset value is obtained by subtracting the detection value of the reference atmospheric pressure sensor of the master unit from the detection value of the worker-side atmospheric pressure sensor of the first slave unit at the time of the setting. It is a value obtained, and the control unit has the detection value of the worker-side atmospheric pressure sensor of the first slave unit from the detection value of the reference atmospheric pressure sensor of the master unit, and the first offset value. It is characterized in that it is configured to determine whether or not the worker is at a high place based on a value obtained by subtracting a predetermined threshold value.

According to the present invention, it can be determined that the worker is at a high place based on the difference between the atmospheric pressure around the operator and the atmospheric pressure at the reference height, and in this case, the hook of the safety belt falls. When it is not in the state of being hung on the preventive member, it is possible to notify the surroundings that the aerial work by the worker is in an unsafe state, so it is safe not to forget to hook the safety belt when working at a high place. Can work at heights.

It is a figure which shows the work site where the aerial work safety management system which concerns on embodiment of this invention is used. It is a schematic block diagram of the said aerial work safety management system. It is a block diagram of the above-mentioned aerial work safety management system. It is a figure explaining the usage form which connected a plurality of slave units to one master unit. It is a figure explaining the usage form which connected the master unit to each of a plurality of slave units. It is a figure which shows the calculation method of the offset value when the master unit and the slave unit are at the same height. It is a figure which shows the calculation method of the offset value at the time of pairing a master unit and a slave unit. It is a figure explaining the operation time of the said aerial work safety management system.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

FIG. 1 is a diagram showing a work site where the aerial work safety management system 1 (shown in FIGS. 2 and 3) according to the embodiment of the present invention is used. The work site is, for example, a site where construction work, maintenance, maintenance and inspection work of various buildings are performed. In the case of construction work, indoor and outdoor plumbing work and wiring work are included. At such various work sites, so-called aerial work such as work on a scaffold, work on a machine, work on a high workbench, etc. may be involved. For example, when the height of the floor or the ground is taken as the reference height, the aerial work can be defined as the work at a place higher than the reference height by, for example, 1.5 m or 2.0 m or more (a place higher than a predetermined value). It may follow the definition of the Industrial Safety and Health Act.

As shown in FIG. 1, the work site is provided with a work floor 100 for the worker A to walk and perform various works, and a fall prevention member 101. The work floor 100 is a floor for performing work at a high place, and is arranged at a place higher than a predetermined height from a reference height. The work floor 100 may be composed of a scaffolding board or a workbench. The fall prevention member 101 is a member for preventing the worker A from falling from the work floor 100, and examples thereof include handrails and ropes stretched sideways, but the members are not limited thereto. It may be a part of various structures.

Worker A wears a safety belt 200 in preparation for aerial work. In this embodiment, a case where the safety belt 200 is a full harness type will be described. The safety belt 200 includes a waist belt 201 that wraps around the waist of worker A, a leg belt 202 that wraps around the thigh, a shoulder belt 203 that extends from the waist belt 201 to the shoulder, and the tip of a rope 204 that extends from the waist belt 201 to the left and right. It is equipped with a hook 205 attached to. The present invention can also be applied to a safety belt other than the full harness type safety belt 200, for example, a safety belt without a leg belt 202 or a shoulder belt 203. Further, only one hook 205 may be provided.

FIG. 2 shows an example of a configuration of the aerial work platform safety management system 1, and is a schematic configuration diagram of the aerial work platform safety management system 1. The aerial work safety management system 1 includes a slave unit 2 mounted on the worker A, a master unit 3 installed away from the slave unit 2, and an administrator terminal 4. The slave unit 2 and the master unit 3 are configured to be communicable by short-range wireless communication of LPWA (Low Power Wide Area). Further, the master unit 3 and the administrator terminal 4 can be connected via, for example, an internet line or a local area network line, but this may also be configured to be communicable by LPWA short-range wireless communication. .. The details of the communication means will be described later.

The aerial work safety management system 1 is a system that manages a worker A who wears a safety belt 200 and performs aerial work. The management of the worker A is to determine whether or not the worker A is performing unsafe work at a high place, and if it is safe, the work is continued without any particular notification, and if it is unsafe, for example. It is to notify the manager or the worker A himself to inform him that it is unsafe and improve it. By using this aerial work safety management system 1, the worker A can be managed. Hereinafter, the details of the aerial work safety management system 1 will be described.

(Configuration of handset 2)
The slave unit 2 can be provided in the safety belt 200 and can be integrated with the safety belt 200. In the form shown in FIG. 2, the slave unit 2 is provided on the hook 205 and is integrated with the hook 205. The slave unit 2 can also be built in a portion to which the rope 204, which is the base end portion of the hook 205, is connected. The slave unit 2 may have a portion other than the hook state detection sensor 20, which will be described later, attached to the waist belt 201 of the safety belt 200, or may be attached to the worker A without going through the safety belt 200. May be good. When there are a plurality of workers A, a plurality of slave units 2 exist, and the plurality of slave units 2 form a part of the aerial work safety management system 1.

As shown in FIG. 3, the slave unit 2 includes a hook state detection sensor 20, a worker-side atmospheric pressure sensor 21, a slave unit-side transmission unit 22, and a slave unit-side microcomputer (slave unit-side control unit) 23. , A battery 24 is provided. The hook state detection sensor 20 and the worker-side atmospheric pressure sensor 21 can be separated, and the worker-side atmospheric pressure sensor 21 can be attached to the helmet of the worker A.

As shown in FIG. 2, the hook state detection sensor 20 is provided on the inner peripheral portion of the hook 205, that is, the portion of the hook 205 that comes into contact with the fall prevention member 101 (shown in FIG. 1), and the hook 205 is provided. It is a sensor for detecting whether or not it is in a state of being hooked on the fall prevention member 101. When the hook 205 is hooked on the fall prevention member 101, the hook state detection sensor 20 comes into contact with the fall prevention member 101 due to the weight of the hook 205. The hook state detection sensor 20 can be configured by a well-known switch or the like that switches from a non-conducting state (OFF state) to a conducting state (ON state) by contact with the fall prevention member 101. Further, the hook state detection sensor 20 can also be configured as a pressure-sensitive sensor or the like that detects that a pressure equal to or higher than a predetermined value is applied. A signal line (not shown) extending from the hook state detection sensor 20 is connected to the microcomputer 23 on the slave unit side.

All or part of the worker-side atmospheric pressure sensor 21, the slave unit-side transmitter 22, the slave unit-side microcomputer 23, and the battery 24 are built in the hook 205. The worker-side atmospheric pressure sensor 21 is a sensor that is attached to the worker A and detects the atmospheric pressure around the worker A, and is composed of a conventionally known pressure sensor. In this embodiment, the worker-side atmospheric pressure sensor 21 is built in the hook 205, but the hook 205 and the worker A are not so far apart in the height direction, and are generally abbreviated as the worker A. Since the hook 205 is arranged at the same height, the atmospheric pressure detected by the worker-side atmospheric pressure sensor 21 is equal to the atmospheric pressure at the height at which the worker A is present. The worker-side atmospheric pressure sensor 21 may be provided on the helmet of the worker A, the waist belt 201, or the like, and in this case as well, the atmospheric pressure at the height at which the worker A is present can be detected by the worker-side atmospheric pressure sensor 21. It is preferable that the atmospheric pressure sensor 21 on the worker side has a short atmospheric pressure detection cycle in consideration of the safety of the worker A, but considering the consumption of the battery 24, for example, the cycle is about once per second. Detects atmospheric pressure and outputs the detected value (atmospheric pressure value). The worker-side atmospheric pressure sensor 21 is connected to the slave unit-side microcomputer 23, and the value detected by the worker-side atmospheric pressure sensor 21 is input to the slave unit-side microcomputer 23.

The handset side transmission unit 22 is a part that transmits the value of the atmospheric pressure output from the worker side atmospheric pressure sensor 21 and the detection result of the hook state detection sensor 20. The slave unit side transmitter 22 is composed of a communication module or the like capable of short-range wireless communication, and for example, a low-power wide area network module such as a conventionally well-known LoRa module, a Sigfox module, or an NB-IoT module is used. Can be done.

The handset-side microcomputer 23 is a part that controls the handset-side transmission unit 22. The handset side microcomputer 23 outputs the detected value input from the worker side atmospheric pressure sensor 21 to the handset side transmitting unit 22 each time the detected value is input, and the handset side transmitting unit 22 outputs the detected value to the master unit 3 To send to. Further, the microcomputer 23 on the slave unit side outputs the detection result of the hook state detection sensor 20 to the transmission unit 22 on the slave unit side, and causes the transmission unit 22 on the slave unit side to transmit the detection result to the master unit 3. The detection result of the hook state detection sensor 20 includes an OFF state in which the hook 205 is not hooked on the fall prevention member 101 and an ON state in which the hook 205 is hooked on the fall prevention member 101. The detection result of the hook state detection sensor 20 transmitted from the slave unit side transmission unit 22 may be an ON / OFF signal of the hook state detection sensor 20, and the hook 205 is not hung on the fall prevention member 101. The signal and the signal indicating that the hook 205 is hung on the fall prevention member 101 may be used.

The battery 24 is for supplying electric power to the hook state detection sensor 20, the worker-side atmospheric pressure sensor 21, the slave unit-side transmission unit 22, and the slave unit-side microcomputer 23. The battery 24 may be a rechargeable battery or a replaceable dry battery.

(Configuration of master unit 3)
The master unit 3 is installed in a place (installation position) where the height does not change, such as the floor or ground of the work site or the lower part of the workbench. One master unit 3 may be installed at one work site, or a plurality of master units 3 may be installed. For example, in the case of a building having a plurality of floors, one master unit 3 can be installed on one floor. The master unit 3 may be installed so as not to move in the height direction, and may move in the horizontal direction. The reason is due to the high-altitude detection algorithm described later.

FIG. 4 is a diagram illustrating a usage mode in which the first slave unit 2A, the second slave unit 2B, and the third slave unit 2C are connected to one master unit 3. As shown in this figure, the first slave unit 2A is attached to the first worker A1, the second slave unit 2B is attached to the second worker A2, and the third slave unit 3A is attached to the third worker A3. Has been done. The number of slave units 2 is not limited to three, and may be two or four or more. That is, the slave unit 2 may include a plurality of slave units 2A, 2B, and 2C, and the plurality of slave units 2A, 2B, and 2C are communicably connected to a single master unit 3.

Further, the present invention can be applied not only to the usage mode shown in FIG. 4 but also to the usage mode in which the master units 3A, 3B and 3C are connected to a plurality of slave units 2A, 2B and 2B, respectively, as shown in FIG. As shown in this figure, the first slave unit 2A mounted on the first worker A1 is connected to the first master unit 3A fixed to the lower portion of the work floor 100 used by the first worker A1. The second slave unit 2B attached to the second worker A2 is connected to the second master unit 3B fixed to the lower portion of the work floor 100 used by the second worker A2. Further, the third slave unit 2C attached to the third worker A3 is connected to the third master unit 3C fixed to the lower portion of the work floor 100 used by the third worker A3. The pair of the slave unit 2 and the master unit 3 is not limited to three, and may be two or four or more.

As shown in FIG. 3, the master unit 3 includes a reference atmospheric pressure sensor 30, a master unit side receiving unit 31, a master unit side transmitting unit 32, a master unit side microcomputer (control unit) 33, and a storage unit 34. And a battery 35. The battery 35 can be configured to be the same as the battery 24 of the slave unit 2. As shown in FIG. 2, the reference atmospheric pressure sensor 30, the master unit side receiving unit 31, the master unit side transmitting unit 32, the master unit side microcomputer 33, the storage unit 34, and the battery 35 are housed in one housing 36. However, only a part of them can be housed in the housing 3A, and the other part can be housed in another housing (not shown).

As shown in FIG. 3, the reference atmospheric pressure sensor 30 is configured separately from the worker-side atmospheric pressure sensor 21 of the slave unit 2, and is a reference for determining whether or not the worker A is at a high place. It is a sensor installed at the reference height to detect the atmospheric pressure at the reference height. The reference atmospheric pressure sensor 30 itself can be configured with the same atmospheric pressure sensor that constitutes the worker-side atmospheric pressure sensor 21. Since the reference atmospheric pressure sensor 30 is provided in the master unit 3, when the worker A is performing the work, the reference atmospheric pressure sensor 30 is arranged away from the worker side atmospheric pressure sensor 21 of the slave unit 2, and the child Detects atmospheric pressure at a height different from that of the worker-side atmospheric pressure sensor 21 of the machine 2. Specifically, since the master unit 3 is installed in a place where the height does not change, the atmospheric pressure at the same height, for example, the floor, the ground, or the height of the workbench, is constantly detected during the work of the worker A.

The master unit side receiving unit 31 is a communication module capable of communicating with the slave unit side transmitting unit 22, and specifically, is composed of a communication module of the same standard as the slave unit side transmitting unit 22. The master unit side receiving unit 31 receives the atmospheric pressure detection value transmitted from the slave unit side transmitting unit 22, that is, the atmospheric pressure detected value detected by the worker side atmospheric pressure sensor 21 of the slave unit 2, and at the same time. Receives the detection result of the hook state detection sensor 20.

As will be described later, the master unit side transmission unit 32 is a portion that outputs a control signal output from the master unit side microcomputer 33. The master unit side transmission unit 32 may be configured by the same communication module as the slave unit side transmission unit 22, or may be configured by a communication module capable of wireless communication with an Internet line or a local area network line. good.

The microcomputer 33 on the master unit side is a part that remotely controls the speaker 42 and the display unit 40 of the administrator terminal 4, which will be described later. The master unit-side microcomputer 33 is based on the difference between the atmospheric pressure detection value output from the worker-side atmospheric pressure sensor 21 and the atmospheric pressure detection value output from the reference atmospheric pressure sensor 30, and the operator A. Is provided with a height determination unit 33a for determining whether or not the vehicle is at a height higher than a predetermined height by a predetermined height or higher. The detection value of the worker-side atmospheric pressure sensor 21 received by the master unit-side receiving unit 31 and the detection value of the reference atmospheric pressure sensor 30 are input to the height determination unit 33a. Further, in the height determination unit 33a, the detection value of the worker-side atmospheric pressure sensor 21 of the slave unit 2 detected at the time of setting performed before the operation of the height work safety management system 1 and the reference detected substantially at the same time. An offset value, which is the difference from the detected value of the atmospheric pressure sensor 30, is also input.

That is, before the operation of the aerial work safety management system 1, the aerial work safety management system 1 is set. When setting the aerial work safety management system 1, first, the master unit 3 is installed at the installation position, the slave unit 2 is attached to the worker A, and the worker A equipped with the slave unit 2 is installed at the installation position of the master unit 3. Stand at the same height as the height of. Since the difference from the reference height due to the height of the worker A can be absorbed by the offset value, the height does not have to be the same.

Then, the detection values of the worker-side atmospheric pressure sensor 21 and the reference atmospheric pressure sensor 30 are input to the master unit-side microcomputer 33. The microcomputer 33 on the master unit side subtracts the detected value of the reference atmospheric pressure sensor 30 from the detected value of the atmospheric pressure sensor 21 on the worker side. The value obtained by this subtraction process is the offset value. That is, even if the worker-side atmospheric pressure sensor 21 and the reference atmospheric pressure sensor 30 are configured with the same atmospheric pressure sensor, it is inevitable that variation will occur. For example, even if the atmospheric pressure is detected at the same height and at the same timing. There may be a difference in the detected value. Further, the height of the worker-side atmospheric pressure sensor 21 worn by the worker A is the reference atmospheric pressure sensor 30 even if the worker A stands at the same height as the height of the installation position of the master unit 3. It may be located higher than. The offset value is calculated in advance in order to prevent the judgment error of the height determination unit 33a due to the variation of the sensor and the judgment error of the height determination unit 33a due to the height of the actual worker-side atmospheric pressure sensor 21. Keep it. That is, the origin is corrected in the height direction by calibration. The calculated offset value is stored in the storage unit 34. The storage unit 34 is composed of, for example, a semiconductor memory, an SSD (Solid State Drive), or the like, and can record and read data.

In the embodiment shown in FIG. 5, since there are three slave units 2A, 2B, and 2C corresponding to the three master units 3A, 3B, and 3C, the offset values of the master unit 3A and the slave unit 2A are set to the master unit 3A. The storage unit 34 stores the offset values of the master unit 3B and the slave unit 2B, stores the offset values of the master unit 3B and the slave unit 2B in the storage unit 34 of the master unit 3B, and stores the offset values of the master unit 3C and the slave unit 2C in the storage unit of the master unit 3C. It should be stored in 34.

On the other hand, in the form shown in FIG. 4, since there is one master unit 3 for a plurality of slave units 2, the offset value is calculated for each slave unit 2 and stored in the storage unit 34. For example, as shown in FIG. 4, when the first slave unit 2A, the second slave unit 2B, and the third slave unit 2C are present, the worker-side atmospheric pressure sensor 21 and the master unit 3 of the first slave unit 2A are present. It is the difference between the first offset value, which is the difference between the detected values from the reference atmospheric pressure sensor 30, and the detected values between the worker-side atmospheric pressure sensor 21 of the second slave unit 2B and the reference atmospheric pressure sensor 30 of the master unit 3. The storage unit 34 stores the second offset value and the third offset value, which is the difference between the detected values of the worker-side atmospheric pressure sensor 21 of the third slave unit 2C and the reference atmospheric pressure sensor 30 of the master unit 3. When there are four or more slave units 2, the offset value increases by that amount, but the storage unit 34 can store the offset value.

FIG. 6 shows an example of calculating the offset value between the worker-side atmospheric pressure sensor 21 of the slave unit 2 and the reference atmospheric pressure sensor 30 of the master unit 3. FIG. 6 shows a case where the first slave unit 2A, the second slave unit 2B, and the third slave unit 2C are communicably connected to a single master unit 3. When calculating the offset value, the first slave unit 2A, the second slave unit 2B, the third slave unit 2C, and the master unit 3 are arranged at substantially the same height, and the atmospheric pressure is detected at substantially the same timing. The obtained detection value is used. If the detection value of the worker-side atmospheric pressure sensor 21 of the first slave unit 2A is 10601.234pa and the detection value of the reference atmospheric pressure sensor 30 of the master unit 3 is 10625.678pa, the first offset value is the work. The value obtained by subtracting the detected value of the operator-side atmospheric pressure sensor 21 from the detected value of the operator-side atmospheric pressure sensor 21, that is, -24.444pa. The second offset value, which is the offset value between the second slave unit 2B and the master unit 3, and the third offset value, which is the offset value between the third slave unit 2C and the master unit 3, can also be calculated by the same calculation method. This makes it possible to perform calibration between the atmospheric pressure sensors 21 and 30.

FIG. 7 shows an example of calculating an offset value when pairing a master unit and a slave unit. In the case of FIG. 7, unlike FIG. 6, the slave unit 2 is attached to the worker A. When calculating the offset value in this example, the slave unit 2 and the master unit 3 detect the atmospheric pressure at substantially the same timing while the worker A stands on the floor or the ground at the same height as the master unit 3. The obtained detection value is used. For example, a pairing switch (not shown) is provided in each of the slave unit 2 and the master unit 3, and the worker-side atmospheric pressure sensor 21 detects when the pairing switch of the slave unit 2 and the master unit 3 is pressed. The value and the detected value of the reference atmospheric pressure sensor 30 are stored. It is not possible to register in advance because it is necessary to pair in the same environment.

For example, if the detection value of the worker side atmospheric pressure sensor 21 of the slave unit 2 is 10607.234pa and the detection value of the reference atmospheric pressure sensor 30 of the master unit 3 is 10625.678pa, the offset value is the worker side. The value obtained by subtracting the detected value of the operator-side atmospheric pressure sensor 21 from the detected value of the atmospheric pressure sensor 21, that is, -18.444pa. When there are two or more slave units 2, the second offset value and the third offset value can be calculated in the same manner. As a result, the master unit 3 and the slave unit 2 can be paired.

The aerial work platform 33a is configured to apply an offset value stored in the storage unit 34 when operating the aerial work safety management system 1 to determine whether or not the worker is in a high place. When a plurality of offset values are stored, for example, a first offset value, a second offset value, ... Are applied to determine whether or not the worker is in a high place.

Specifically, the height determination unit 33a determines the detection value of the worker-side atmospheric pressure sensor 21 of the slave unit 2 from the detection value of the reference atmospheric pressure sensor 30 of the master unit 3, an offset value, and a predetermined threshold value. Based on the value obtained by subtraction, it is determined whether or not the worker is at a high place.

Next, the determination of the aerial work platform 33a during the operation of the aerial work safety management system 1 will be described with reference to FIG. FIG. 8 shows a case where the first slave unit 2A, the second slave unit 2B, and the third slave unit 2C are communicably connected to a single master unit 3 to operate the aerial work safety management system 1. .. The first offset value between the master unit 3 and the first slave unit 2A is -18.444pa, the second offset value between the master unit 3 and the second slave unit 2B is -15.256pa, and the master unit 3 and the third slave unit 2B. The third offset value with the slave unit 2C is -16.856pa. The first to third offset values in this case are values calculated by the pairing shown in FIG. 7. Further, the height threshold value for determining whether or not the height is a high place is 20.0 pa when the work at a height of 2 m or more is set as a high place. The height threshold value can be arbitrarily set according to the height determined to be a high place. Further, when operating the aerial work safety management system 1, the master unit 3 is installed at a reference height. It is assumed that the detected value of the reference atmospheric pressure sensor 30 of the master unit 3 is 10611.234pa.

It is assumed that the worker A1 equipped with the first handset 2A stands at the reference height, and the detected value of the worker-side atmospheric pressure sensor 21 of the first handset 2A is 10593.678pa. In this case, the height determination unit 33a executes the following calculation. The detection value of the reference atmospheric pressure sensor 30 of the master unit 3, the first offset value, and the height threshold value are subtracted from the detection value of the worker-side atmospheric pressure sensor 21 of the first slave unit 2A. The obtained value (Z) is 20.888pa. Since the height determination unit 33a has Z> 0, it is determined that the worker A1 is at a place lower than the place defined as the height.

Further, it is assumed that the worker A2 equipped with the second handset 2B is standing on the workbench, and the detected value of the worker-side atmospheric pressure sensor 21 of the second handset 2B is 10566.945pa. In this case, the height determination unit 33a executes the following calculation. The detection value of the reference atmospheric pressure sensor 30 of the master unit 3, the second offset value, and the height threshold value are subtracted from the detection value of the worker-side atmospheric pressure sensor 21 of the second slave unit 2B. The obtained value (Z) is -49.033pa. Since the height determination unit 33a has Z <0, it is determined that the worker A2 is in a place defined as a height.

Further, it is assumed that the worker A3 equipped with the third handset 2C is standing on the elevating device, and the detected value of the worker-side atmospheric pressure sensor 21 of the third handset 2C is 10480.678pa. In this case, the height determination unit 33a executes the following calculation. A value (Z) obtained by subtracting the detection value of the reference atmospheric pressure sensor 30 of the master unit 3, the third offset value, and the high altitude threshold value from the detection value of the worker-side atmospheric pressure sensor 21 of the third slave unit 2C. Is -127.7pa. Since the height determination unit 33a has Z <0, it is determined that the worker A3 is in a place defined as a height.

If Z = 0 as a result of the above calculation, an error is included and it is basically impossible. Therefore, the height determination unit 33a is located at a position lower in the master unit 3 than in the slave unit 2. Is determined.

As shown in FIG. 3, the microcomputer 33 on the master unit side includes a control signal generation unit 33b. As a result of the determination by the height determination unit 33a, the control signal generation unit 33b determines that the worker A is in a high place, and the hook 205 is hung on the fall prevention member 101 by the hook state detection sensor 20. If it is detected that it is not, a notification signal (an example of a control signal) for notifying the surroundings is generated. The fact that the notification signal is generated means that the worker A is working at a high place, but the hook 205 is not hooked on the fall prevention member 101, and the worker's work at a high place is in an unsafe state. I can say. That is, the control signal generation unit 33b generates a notification signal only when the aerial work by the operator is in an unsafe state.

On the other hand, when the control signal generation unit 33b determines that the worker A is not at a high place as a result of the determination by the height determination unit 33a, the control signal generation unit 33b outputs a notification signal regardless of the detection result of the hook state detection sensor 20. Do not generate. Further, when the hook state detection sensor 20 detects that the hook 205 is in a state of being hooked on the fall prevention member 101, the control signal generation unit 33b does not care about the determination result by the height determination unit 33a. Does not generate a notification signal. The notification signal generated by the control signal generation unit 33b is transmitted from the master unit side transmission unit 32 to the administrator terminal 4.

(Configuration of administrator terminal 4)
The administrator terminal 4 is composed of an information terminal carried by the administrator. Examples of the administrator terminal 4 include, but are not limited to, smartphones, tablet terminals, notebook personal computers, and the like, and may be configured by, for example, a desktop personal computer. The manager is, for example, a person who manages the work site, a supervisor who supervises the work site, and the like, and does not necessarily have to be at the work site, and may be, for example, at a management office or the like.

The administrator terminal 4 includes a display unit 40, an operation unit 41, a speaker 42, an administrator-side receiving unit 43, an administrator-side microcomputer (administrator-side control unit) 44, and a battery 45. .. The display unit 40, the operation unit 41, and the speaker 42 are connected to the administrator-side microcomputer 44. Further, the battery 45 can be configured to be the same as the battery 24 of the slave unit 2.

The display unit 40 is provided in the housing 46 of the administrator terminal 4, and is composed of, for example, a liquid crystal display, an organic EL display, or the like. The operation unit 41 is composed of, for example, a touch-operable pressure-sensitive touch panel, buttons, switches, and the like. In the case of a pressure-sensitive touch panel, it can be provided so as to overlap with the display unit 40. The speaker 42 can emit various sounds.

The administrator-side receiving unit 43 is a communication module capable of communicating with the master unit-side transmitting unit 32, and specifically, is composed of a communication module of the same standard as the master unit-side transmitting unit 32. The administrator-side receiving unit 43 receives the notification signal transmitted from the master unit-side transmitting unit 32.

The administrator-side microcomputer 44 is a part that receives the operation of the operation unit 41 and the input of the notification signal received by the administrator-side reception unit 43, and controls the display unit 40 and the speaker 42. Specifically, when the administrator-side microcomputer 44 receives the input of the notification signal received by the administrator-side receiving unit 43, the administrator-side microcomputer 44 notifies the display unit 40 that the aerial work by the operator is in an unsafe state. Let me. As an example of notification by the display unit 40, a display form such as "not hooked while working at a high place" or a form of displaying a symbol or a mark indicating an unsafe state is provided on the display unit 40. Can be mentioned. Further, when the administrator-side microcomputer 44 receives the input of the notification signal received by the administrator-side receiving unit 43, the administrator-side microcomputer 44 notifies the speaker 42 that the aerial work by the operator is in an unsafe state. Examples of the notification by the speaker 42 include a form in which the speaker 42 is voiced, for example, "the hook is not hooked while working at a high place", a form in which various alarm sounds (alarm sounds) are generated, and the like. The display unit 40 and the speaker 42 are examples of a notification unit that notifies that the worker's work at a high place is in an unsafe state. Only one of the display unit 40 and the speaker 42 may be provided. Further, the notification unit may be composed of, for example, a vibration generator that generates a predetermined vibration.

With the above configuration, when the microcomputer 33 on the master unit side determines that the worker A is in a high place and it is detected that the hook 205 is not in the state of being hooked on the fall prevention member 101, the master The machine-side transmission unit 32 transmits the notification signal to the administrator terminal 4. As a result, it is possible to control the display unit 40 and the speaker 42 of the administrator terminal 4 to notify that the worker A is in an unsafe state.

The display unit 40 and the speaker 42 as the notification unit may be provided on the slave unit 2 in addition to the administrator terminal 4. Although not shown, a speaker and a vibration generator are provided in the slave unit 2, the microcomputer 33 on the master unit side determines that the worker A is in a high place, and the hook 205 is hung on the fall prevention member 101. When it is detected that the state is not the same, a notification signal is transmitted to the slave unit 2, whereby the speaker or the vibration generator can notify the worker A that the state is unsafe.

(Action and effect of the embodiment)
As described above, according to the high-altitude work safety management system 1 according to this embodiment, when the worker A wearing the safety band 200 is in a high place, the atmospheric pressure sensor 21 on the worker side outputs a large amount. The value of the atmospheric pressure becomes lower than the value of the atmospheric pressure output from the reference atmospheric pressure sensor 30, and the height determination unit 33a can determine that the worker is in a high place based on the difference in the atmospheric pressure. Further, whether or not the hook 205 of the safety belt 200 is hooked on the fall arrest member 101 is detected by the hook state detection sensor 20. When the worker A is in a high place but the hook 205 of the safety belt 200 is not hooked on the fall arrest member 101, it can be said that the work in the high place by the worker A is in an unsafe state. In this case, the display unit 40 and the speaker 42 can notify that the aerial work by the worker A is in an unsafe state, and for example, the supervisor, the manager, and the like can be notified of this. This allows the operator to be careful to correct the unsafe condition. Further, it is possible to notify the worker A himself of the unsafe state, and in this case as well, the unsafe state can be corrected and the work at a high place can be safely performed.

When determining whether or not the height determination unit 33a is in a high place, the determination result is obtained by using the offset value which is the difference between the detected values of the worker side atmospheric pressure sensor 21 and the reference atmospheric pressure sensor 30. It will be accurate.

The above embodiments are merely exemplary in all respects and should not be construed in a limited way. Further, all modifications and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

As described above, the aerial work platform safety management system according to the present invention can be used, for example, at a work site where various aerial work is performed.

1 High-place work safety management system 2 Slave unit 3 Master unit 4 Administrator terminal 20 Hook state detection sensor 21 Worker side atmospheric pressure sensor 22 Slave unit side transmitter 30 Reference atmospheric pressure sensor 31 Master unit side receiver 32 Master unit side Transmitter 33 Master unit side microcomputer (control unit)
33a Height determination unit 33b Signal generation unit 40 Display unit (notification unit)
42 Speaker (notification unit)
100 Work floor 101 Fall arrest member 200 Safety belt 205 Hook

Claims (5)

In the aerial work safety management system that manages workers who wear safety belts and perform aerial work.
A hook state detection sensor provided on the hook of the safety belt and detecting whether or not the hook is hooked on the fall arrest member for preventing the operator from falling,
A worker-side atmospheric pressure sensor that is attached to the worker and detects the atmospheric pressure around the worker,
In addition to being configured separately from the worker-side atmospheric pressure sensor, it is placed at a reference height that serves as a reference when determining whether or not the worker is at a high place, and detects the atmospheric pressure at the reference height. With the reference atmospheric pressure sensor,
A notification unit that notifies that the aerial work by the worker is in an unsafe state,
A control unit that controls the notification unit is provided.
The control unit allows the operator to perform the reference height based on the difference between the detected value of the atmospheric pressure output from the worker-side atmospheric pressure sensor and the detected value of the atmospheric pressure output from the reference atmospheric pressure sensor. It is determined whether or not the user is at a higher place than a predetermined value, it is determined that the worker is at a high place, and the hook is not in a state of being hooked on the fall prevention member by the hook state detection sensor. A high-altitude work safety management system characterized in that, when detected, the notification unit is configured to notify that it is in an unsafe state. In the aerial work safety management system according to claim 1,
The worker-side atmospheric pressure sensor and the hook state detection sensor are an aerial work safety management system provided on the hook. In the aerial work safety management system according to claim 1 or 2.
A handset having the worker-side atmospheric pressure sensor and the hook state detection sensor,
A master unit having the reference atmospheric pressure sensor and the control unit,
It is equipped with an administrator terminal having the notification unit.
The handset is provided with a handset side transmitter that transmits the detection value of the atmospheric pressure output from the worker side atmospheric pressure sensor and the detection result of the hook state detection sensor.
The master unit receives the detection value of the atmospheric pressure transmitted from the slave unit side transmitter unit and the master unit side receiver unit that receives the detection result, and the control signal of the notification unit output from the control unit. A transmitter on the master unit side for output is provided, and
An aerial work platform safety management system characterized in that the administrator terminal is provided with an administrator-side receiving unit that receives the control signal transmitted from the master unit-side transmitting unit. In the aerial work safety management system according to claim 3,
The slave unit includes a first slave unit and a second slave unit.
The first slave unit and the second slave unit are communicably connected to the single master unit and are connected to each other.
The master unit has a detection value of the worker-side atmospheric pressure sensor of the first slave unit and a detection value of the reference atmospheric pressure sensor of the master unit at the time of setting performed before the operation of the high-altitude work safety management system. The first offset value, which is the difference between the two, and the difference between the detection value of the worker-side atmospheric pressure sensor of the second slave unit and the detection value of the reference atmospheric pressure sensor of the master unit at the time of system setting. Equipped with a storage unit that stores 2 offset values
The control unit is characterized in that it is configured to apply the first offset value and the second offset value stored in the storage unit to determine whether or not the operator is at a high place. High-altitude work safety management system. In the aerial work safety management system according to claim 4,
The first offset value is a value obtained by subtracting the detection value of the reference atmospheric pressure sensor of the master unit from the detection value of the worker-side atmospheric pressure sensor of the first slave unit at the time of the setting. ,
The control unit subtracts the detection value of the worker-side atmospheric pressure sensor of the first slave unit, the first offset value, and a predetermined threshold value from the detection value of the reference atmospheric pressure sensor of the master unit. An aerial work platform safety management system characterized in that it is configured to determine whether or not a worker is in a high place based on the obtained value.

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