JP2018040753A - Heavy machine contact accident prevention system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heavy machine contact accident prevention system that can directly give an alarm to a proximity worker and prevent a contact accident between a heavy machine and the worker.SOLUTION: A heavy machine contact accident prevention system includes: portable notification means including a transmission unit for transmitting proximity information based on at least tag information carried around by a proximity worker, a reception unit for receiving alarm information, and a notification unit for giving notice of the received alarm information; a first antenna provided on a boom of a heavy machine or in the vicinity of a boom attachment place of an upper revolving body; a second antenna provided at an opposite side to the boom attachment place of the upper revolving body of the heavy machine; and a control device that is electrically connected with the first antenna and second antenna and upon obtaining the proximity information which the first antenna and second antenna received from the portable notification means, transmits alarm information to notification means attached to the heavy machine, and transmits the alarm information to the portable notification means via the first antenna and second antenna.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heavy machinery contact accident prevention system.

  Conventionally, in civil engineering and building construction sites (hereinafter referred to as work sites) using construction machines (hereinafter referred to as heavy machinery) such as backhoes (hydraulic excavators), wheel loaders, mobile cranes, cranes and the like placed on floating docks, Preventing contact accidents between heavy equipment and workers has become an important issue in ensuring work safety.

  For this reason, for example, detecting means such as an infrared sensor and an optical sensor is attached to a heavy machine to detect the distance to surrounding workers, and the heavy machine is stopped according to the detected distance or an alarm is given to an operator (operator) of the heavy machine. A system has been proposed. However, this method has a problem that errors are likely to occur due to the influence of the surrounding environment (for example, sunlight, wind, electromagnetic noise, etc.), and false detection of an approaching worker is likely to occur. On the other hand, a system for detecting an approaching worker around a heavy machine using a tag that transmits an ID signal by radio waves or ultrasonic waves has been developed (see Patent Document 1).

JP 2011-163835 A

  However, the above-described technique is to notify the operator who operates the heavy machinery of the proximity information of the proximity worker, and does not notify the proximity worker of the warning. Therefore, an operator who operates a heavy machine must alert a nearby worker from the cab or the like. In addition, the heavy machinery must be stopped every time alerting is performed, and workability is poor.

  Especially in the case of large cranes, the swinging movement of the suspension device swung from the boom is large, and the distance between the adjacent worker and the operator is often far away. It is a danger.

  An object of one embodiment of the present invention is made in view of the above-described problems, and it is possible to notify a proximity worker directly and effectively prevent contact between a heavy machine and a worker. It is to provide a possible heavy machinery contact accident prevention system.

The above issues
When a heavy machine having at least a boom and an upper turning body, and a nearby worker approaching the heavy machine at a work site enter a predetermined area, the proximity work of the proximity worker is notified to the operator, and the proximity work is performed. It is a heavy machinery contact accident prevention system that notifies warning information to employees,
Portable notification means comprising: a transmission unit that transmits the proximity information based on at least tag information carried by the proximity worker; a reception unit that receives the warning information; and a notification unit that notifies the received warning information;
A first antenna provided in the vicinity of a boom mounting position of the boom or the upper swing body of the heavy machinery;
A second antenna provided on the opposite side to the boom mounting position of the upper swing body of the heavy machinery;
When the first antenna and the second antenna are electrically connected to the first antenna and the second antenna and the proximity information received from the portable notification means is acquired by the first antenna and the second antenna, the warning information is attached to the heavy equipment. It can be solved by a heavy machinery contact accident prevention system characterized by having a control device that transmits the warning information to the portable notification means via the first antenna or the second antenna while transmitting to the notification means. .

  ADVANTAGE OF THE INVENTION According to this invention, a warning can be alert | reported directly with respect to an adjacent worker, and the heavy machinery contact accident prevention system which can prevent the contact with a heavy machinery and a worker effectively can be provided.

It is the figure which showed schematic structure of the heavy machinery contact accident prevention system which concerns on embodiment of this invention. It is a functional block diagram of the heavy machinery contact accident prevention system of FIG. It is a flowchart explaining the processing flow of the heavy machinery contact accident prevention system which concerns on this embodiment. It is a figure explaining different embodiment of the heavy machinery contact accident prevention system which concerns on embodiment of this invention.

  Hereinafter, an embodiment of a heavy machinery contact accident prevention system according to the present invention will be described. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and redundant description thereof will be simplified or omitted as appropriate. The drawings are not intended to show the relative ratio between members or parts. Accordingly, specific dimensions can be determined by one skilled in the art in light of the following non-limiting embodiments.

  FIG. 1 is an elevation view showing a schematic configuration of a heavy machinery contact accident prevention system 1 according to the embodiment. FIG. 1 shows a case where the heavy machinery contact accident prevention system 1 according to the embodiment is applied to a large crane 10 arranged in a floating dock FD. However, the present invention is not limited to this, and can be implemented in general heavy machinery (construction machinery) such as a backhoe (hydraulic excavator), a wheel loader, and a crawler crane. Furthermore, it can be applied to a heavy machine having a boom.

  The floating dock FD shown in FIG. 1 has a bottom FDT on which an operator K works, a wall FDH standing in a vertical direction from the bottom FDT, and a column FDS that supports the crane 10. Note that the worker K described above will be referred to as a nearby worker K ′ when entering the predetermined area in the following description.

  The crane 10 includes an upper swing body 11 that is pivotably connected to the support column FDS, and a boom 12 that is provided on the front side (arrow X1 side) of the upper swing body 11.

  The upper swing body 11 is provided with an operation chamber 11a, and the operation chamber 11a is operated for turning the upper swing body 11, winding and unloading a cargo handling rope (wire rope for cargo handling) 13, unwinding the boom 12, and the like. An operating device (not shown) is installed. In addition, in the operation chamber 11a, a notification means 50 for notifying that the proximity worker K ′ has entered a predetermined area is mounted.

  The upper swing body 11 is provided with a winch 11b for winding and unloading the cargo handling rope 13 and winding and unwinding the boom hoisting rope (boom hoisting wire rope) 14.

  The boom 12 is supported by the upper swing body 11 so as to be able to undulate (swing) through a support shaft whose base end extends in the horizontal direction.

  At the tip of the boom 12, a tip portion of a boom hoisting rope 14 fed from the winch 11b is attached. Therefore, the boom 12 is raised and lowered by winding and unwinding the boom raising and lowering rope 14 by the winch 11b.

  A boom side pulley 12 a is rotatably supported at the tip of the boom 12.

  A cargo handling rope 13 fed out from the winch 11b is hung on the boom side pulley 12a.

  The tip of the cargo handling rope 13 is attached to the tip of the boom 12 after being hung around the pulley of the hook block 12b. Accordingly, the hook block 12b is moved in the vertical direction by winding and unwinding the cargo handling rope 13 by the winch 11b.

  The heavy machinery contact accident prevention system 1 of the present embodiment includes a first antenna 20, a second antenna 30, a control device 40, a notification unit 50, and a portable notification unit 60 carried by the operator K, which are mounted on the crane 10 having the above-described configuration. It is set as the structure containing.

  Hereinafter, the structure of the heavy machinery contact accident prevention system 1 of this embodiment is demonstrated in detail based on FIG. 1, FIG. FIG. 2 is a functional block diagram illustrating the functional configuration of the heavy machinery contact accident prevention system 1 according to the present embodiment. The “predetermined area” described in the claims refers to a dangerous area that is judged to be dangerous when the worker K enters, and further speaking, in the present embodiment, the first antenna 20 and the first area. It refers to the receivable area of the two antennas 30. That is, the receivable area N of the first antenna 20 is set to be the same as the dangerous area N, and is hereinafter referred to as a predetermined area N. Further, the receivable area M of the second antenna 30 is set to be the same as the dangerous area M, and is hereinafter referred to as a predetermined area M.

First, the portable notification means 60 carried by the worker K will be described.
The portable notification unit 60 includes a transmission unit 61, a reception unit 62, a notification unit 63, and a storage unit 64 inside a housing made of resin or the like. As the portable notification means 60, a passive type or an active type capable of securing a necessary communication distance can be arbitrarily selected and used, but an active type incorporating a power source (battery) is preferable. The casing is small enough to be portable.

  The storage unit 64 stores ID tag data, various data, a program, and the like as tag information given to each portable notification unit 60. The ID tag data is tag information previously associated with worker information, for example.

  The transmission unit 61 has a function of transmitting ID tag data. The radio wave transmission range of the transmission unit 61 of this embodiment may be a maximum of about 10 to 15 m. The transmission unit 61 is set to transmit ID tag data intermittently and automatically at intervals of, for example, 0.2 seconds or more. In the present embodiment, ID tag data transmitted by the transmission unit 61 is processed as proximity information. The transmitted proximity information can also be processed as position information in the control device 40 described later.

  The receiving unit 62 has a function of receiving warning information transmitted from the first antenna 20 or the second antenna 30. As will be described later, the warning information received by the receiving unit 62 is a distance between the portable notification means 60 and the first antenna or the second antenna in a predetermined area (N or M), or a predetermined area ( N or M) depending on the residence time.

  When the receiving unit 62 receives the warning information, the notification unit 63 has a function of generating a sound and / or vibration for notifying the proximity worker K ′ of the warning. The sound data or vibration data for notifying the warning may be stored in the storage unit 64, for example. The sound data stored in the storage unit 64 includes, for example, a plurality of warning sound patterns such as “Peepy” and a plurality of sound data patterns such as “entering a danger area”. In addition, the vibration data stored in the storage unit 64 includes a plurality of vibration patterns in which the strength and interval of vibration are changed. Therefore, the notification unit 63 includes a vibration unit that vibrates the portable notification unit 60. The notification unit 63 of the present embodiment preferably notifies the warning basically by both sound and vibration, but may be notification of only one of them.

  The notification unit 63 generates warning information that is changed according to the distance from the position of the portable notification unit 60 to the first antenna or the second antenna, or the staying time in the predetermined area (N or M) of the portable notification unit 60. Based on this, the pattern of the notification method may be changed. For example, the volume and interval of the warning sound may be changed, or voice data that prompts evacuation may be notified. In the notification by vibration, it is also possible to change the strength and interval of vibration. In addition, the alerting | reporting part 63 may have a light emission part which alert | reports warning information with light etc., and may alert | report combining a sound, a vibration, and light. Therefore, it is preferable that the storage unit 64 stores a plurality of lighting patterns such as light intensity and interval.

  As will be described in detail later, in the heavy machinery contact accident prevention system 1 according to the present embodiment, the portable notification means 60 carried by the worker K constantly transmits the ID tag data, so that the worker K has a predetermined area (N Or it can always be monitored whether it falls within M). Further, when the vehicle enters the predetermined area (N or M), since the warning can be directly notified to the nearby worker K ′ by the portable notification means 60, a contact accident with a heavy machine can be avoided in advance.

  In addition, the portable alerting | reporting means 60 of this embodiment may be equipped with the touchscreen type input display part etc. which perform a setting change.

Next, each member and function mounted on the crane 10 which comprises the heavy machinery contact accident prevention system 1 are demonstrated.
The first antenna 20 is an antenna having directivity, and proximity information based on ID tag data transmitted by the portable notification means 60 carried by the proximity worker K ′ that has entered the predetermined area N at a position directly below the boom 12. Receive. The first antenna 20 is provided in the vicinity of the boom mounting position of the upper swing body 11. In the case of this embodiment, since the work area of the worker K is at a position below the crane 10, the first antenna 20 is preferably arranged downward. Moreover, although the 1st antenna 20 of the example of illustration is made into the Yagi antenna, it is not this limitation.

  The installation of the first antenna 20 is not limited to the illustrated example, and may be provided at the tip of the boom 12. At that time, it is preferable that the tip of the first antenna 20 is directed vertically downward. Further, the first antenna 20 may be provided at any location in the extending direction of the boom 12.

  In addition, the maximum distance of the receivable area | region N (predetermined area | region N) of the 1st antenna 20 is 30-50 m. The radio wave angle of the receivable area N is, for example, 90 to 120 degrees.

The first antenna 20 includes a reception unit 21 and a transmission unit 22.
The receiving unit 21 has a function of receiving, as proximity information, ID tag data transmitted from the transmitting unit 61 of the portable notification means 60 within a predetermined area N. The receiving unit 21 has a function of receiving warning information transmitted from the control device 40 described later.

  The transmission unit 22 has a function of transmitting proximity information received by the reception unit 21 in a predetermined area N to a control device 40 described later. The transmission unit 22 has a function of transmitting the warning information received by the reception unit 21 from the control device 40 to the portable notification unit 60 existing in the predetermined area N.

  The second antenna 30 is omnidirectional and has a receivable area M that is narrower than that of the first antenna 20. In this embodiment, it is a helical antenna, and ID tag data transmitted by the portable notification means 60 carried by the proximity worker K ′ that has entered the predetermined area M on the side opposite to the boom 12 of the upper swing body 11 (arrow X2 side). Proximity information based on is received. The second antenna 30 is provided on the opposite side (rear side) of the upper swing body 11 from the boom mounting position. The maximum diameter of the receivable area M (predetermined area M) of the second antenna 30 is 10 to 25 m.

The second antenna 30 has a reception unit 31 and a transmission unit 32.
The reception unit 31 has a function of receiving, as proximity information, ID tag data transmitted from the transmission unit 61 of the mobile notification means 60 within the predetermined area M. The receiving unit 31 has a function of receiving warning information transmitted from the control device 40 described later.

  The transmission unit 32 has a function of transmitting proximity information received by the reception unit 31 in a predetermined area M to a control device 40 described later. The transmission unit 32 has a function of transmitting the warning information received from the control device 40 by the reception unit 31 to the portable notification means 60 existing in the predetermined area N.

  The control device 40 is configured to include a reception unit 41, a transmission unit 42, an input unit 43, a processing unit 44, and a storage unit 45 inside a housing made of resin or the like.

  The receiving unit 41 has a function of receiving proximity information (ID tag data) transmitted from the first antenna 20 or the second antenna 30. The receiving unit 41 may output the received proximity information to the processing unit 44.

  The transmission unit 42 has a function of transmitting warning information to the notification unit 50, the first antenna 20, and the second antenna 30. The transmission unit 42 has a function of transmitting a signal for controlling the operation of the crane 10 (hereinafter referred to as “operation control signal”) to the heavy machinery control system 11 c mounted on the crane 10. Note that the warning information transmitted by the transmission unit 42 and the operation control signal for controlling the operation of the crane 10 may be acquired from the processing unit 44 described later.

  The input unit 43 has a function of storing ID tag information and the like in the storage unit 45 and inputting design information, work information, control information, and the like. The input unit 43 includes an external interface.

  When the processing unit 44 acquires the proximity information output from the reception unit 41, the processing unit 44 generates warning information and outputs the warning information to the transmission unit 42. Further, from the acquired proximity information and each data in the storage unit 45, the distance from the position of the portable notification means 60 to the first antenna or the second antenna, or the stay in a predetermined area (N or M) of the portable notification means 60 Calculate time. And the warning information changed according to the above-mentioned distance or stay time may be produced | generated, and you may output to the transmission part 42. FIG.

  Further, the processing unit 44 of the present embodiment determines whether or not to perform operation control for delaying or stopping the operation of the crane 10 (elevating the boom 12, turning the upper swing body 11, etc.) from the calculated distance or stay time. To do. When it is necessary to perform operation control of the crane 10, an operation control signal is generated and output to the transmission unit 42. The processing unit 44 may be a microcomputer.

  The storage unit 45 stores ID tag list information, design information, work information, control information, various data including data related to the first antenna 20 and the second antenna 30, programs, and the like of each portable notification unit 60. The storage unit 45 stores the ID tag data given to the control device 40, and is associated with each portable notification unit 60 carried by the worker K. Therefore, information exchange is established between the control device 40 mounted on one crane 10 and the portable notification means 60 associated with the control device 40.

  The notification unit 50 includes a reception unit 51, a notification unit 52, and a storage unit 53.

  The receiving unit 51 has a function of receiving warning information transmitted from the transmitting unit 42 of the control device 40.

  The notification unit 52 has a function of notifying the operator of a warning when the reception unit 51 receives the warning information. Specifically, it may be an indicator lamp, a flashing lamp, and / or a speaker. The indicator lamp and the blinking lamp may be configured to have one color or a plurality of colors. The speaker outputs a warning sound or a voice message.

  The storage unit 53 may store lighting patterns such as indicator lights and flashing lights, warning sound patterns output from speakers, and voice message patterns.

  In the present embodiment, the warning information received by the receiving unit 51 may be changed according to the distance or the stay time described above. Therefore, the notification unit 52 preferably changes the notification method based on the changed warning information. For example, the indicator lamp and the flashing lamp may be three colors (red, yellow, and green), and the warning may be notified by changing the lighting color or lighting interval according to the distance or the length of staying time. Moreover, it is preferable to change the content of the voice message according to the distance or the length of the staying time.

<Processing>
Next, the processing flow of the heavy machinery contact accident prevention system according to the present embodiment will be briefly described with reference to FIG. FIG. 3 is a flowchart for explaining the processing flow of the heavy machinery contact accident prevention system according to the present embodiment.

  First, in step (hereinafter abbreviated as ST) 1, the crane 10 is operated.

  Then, the first antenna 20 and the second antenna 30 monitor whether or not the worker K has entered each predetermined area (N or M) in ST2. Specifically, the first antenna 20 and the second antenna 30 monitor whether ID tag data (proximity information) transmitted from the transmission unit 61 of the portable notification means 60 is detected.

  When the first antenna 20 and the second antenna 30 detect the ID tag data (proximity information) transmitted from the transmission unit 61 of the portable notification means 60 (YES), the first antenna 20 and the second antenna 30 immediately transmit to the control device 40 (ST3). If the ID tag data (proximity information) is not detected from the transmitter 61 of the portable notification means 60 in ST2 (NO), since the worker K has not entered the predetermined area (N or M), step 12 Proceed to

  Next, when the reception unit 41 of the control device 40 receives proximity information, the processing unit 44 acquires proximity information from the reception unit 41 and generates warning information in ST4. At this time, the processing unit 44 determines the distance from the position of the portable notification unit 60 to the first antenna or the second antenna from the proximity information acquired as described above and each data in the storage unit 45 or a predetermined value of the portable notification unit 60. The staying time in the area (N or M) is calculated. And the warning information according to above-mentioned distance or stay time is produced | generated.

  Further, the processing unit 44 determines whether or not it is necessary to perform operation control such as delaying or stopping the operation of the crane 10 in ST5. This determination process may be determined by comparing the calculated distance or stay time with a preset distance threshold or time threshold.

  If the processing unit 44 determines in ST5 that it is necessary to control the operation of the crane 10 (YES), an operation control signal is generated and transmitted to the transmission unit 42. The transmission unit 42 transmits the operation control signal to the heavy machinery control system 11c mounted on the crane 10 (ST6). When the heavy equipment control system 11c acquires the operation control signal, the heavy equipment control system 11c controls the operation of the crane 10 by controlling the amount of hydraulic oil, the pilot pressure, or the electric system supplied to the upper swing body 11 and the boom 12, for example. .

  When the processing unit 44 determines in ST5 that it is not necessary to control the operation of the crane 10 (NO), the process proceeds to ST7.

  In ST7, the processing unit 44 transmits the generated warning information to the notification unit 50 and the portable notification unit 60 carried by the proximity worker K ′.

  Then, the notification unit 50 notifies the operator of a warning by the notification unit 52 by turning on a display lamp or flashing lamp and / or a voice message. Moreover, the portable alerting | reporting means 60 alert | reports a warning to the adjacent worker K 'by a sound and vibration by the alerting | reporting part 63 (ST8).

  In ST9, the control device 40 determines whether the first antenna 20 and the second antenna 30 are detecting ID tag data (proximity information) from the transmission unit 61 of the portable notification means 60. When the proximity information is detected (YES), the control device 40 determines that the proximity worker K ′ is present in the predetermined area (N or M), and warns by the notification means 50 and the portable notification means 60. Continue to report.

  When the proximity information is not detected in ST9 (NO), the control device 40 determines that the proximity worker K ′ has left the predetermined area (N or M), and immediately alerts by the notification means 50 and the portable notification means 60. Is stopped (ST10).

  Then, in ST11, the control device 40 transmits a signal for stopping the operation control signal to the heavy machinery control system 11c, and enables the crane 10 to operate in the normal mode.

  In ST12, the control device 40 determines whether the work by the crane 10 has been completed. This may be performed by detecting whether the power of the crane 10 is turned off. When the control device 40 determines in ST12 that the work by the crane 10 has been completed (YES), the process is terminated. When the control device 40 determines in ST12 that the work by the crane 10 has not been completed (NO), the process returns to ST2, and the above-described processing steps are repeated.

  In ST8 and ST9, even though the portable notification means 60 notifies the proximity worker K ′ of the warning, even if the proximity worker K ′ has passed a predetermined time (N or M) from the predetermined area. When not eviction, the notification unit 63 may perform notification based on the maximum level of the sound and vibration pattern stored in the storage unit 64.

  As described above, the heavy machinery contact accident prevention system 1 according to the present embodiment notifies the close worker K ′ who has entered the predetermined area (N or M) directly to the portable notification means 60 carried by himself / herself. Since it was set as the structure, the contact accident with a heavy machine can be prevented beforehand and effectively. Further, since the warning method for the proximity worker K ′ changes according to the distance and stay time between the proximity worker K ′ and the antenna in a predetermined area (N or M), the danger level to the proximity worker K ′ is changed. Can be recognized quickly and reliably.

  In addition, since it is not necessary for the operator who has detected the close worker K ′ to call attention directly as in the conventional case, it can be actively implemented on large heavy machinery and the like in which the distance between the heavy machinery and the worker is greatly separated. .

  In addition, it is determined whether or not to control the operation of the heavy machinery (crane 10) according to the distance and stay time between the adjacent worker K ′ and the antenna in a predetermined area (N or M), and the operation control is performed. Since appropriate operation control is automatically performed when necessary, it is possible to reliably prevent a contact accident between the adjacent worker K ′ and the heavy machinery.

(Modification)
FIG. 4 shows a different embodiment of the heavy machinery contact accident prevention system 1 according to the embodiment of the present invention. FIG. 4 shows a heavy machinery contact accident prevention system 1 ′ implemented in a floating dock FD having a plurality of cranes 10.

  In the illustrated example, two cranes 10 are arranged, but two or more cranes may be provided. Here, the crane arranged on the right side in the drawing is described as 10R, and the crane arranged on the left side is described as 10L. The first antenna 20R, the second antenna 30R, the control device 40R, and the notification means 50R similar to those shown in FIGS. 1 and 2 are mounted on the crane 10R. Similarly, the first antenna 20L, the second antenna 30L, the control device 40L, and the notification unit 50L are mounted on the crane 10L.

  Therefore, a predetermined area NR or MR that is a dangerous area is set in the crane 10R, and a predetermined area NL or ML that is a dangerous area is set in the crane 10L, and has predetermined areas in different areas. ing.

  In addition, the worker K who works in the area where the two cranes 10R and 10L operate carries the portable notification means 60 described above.

  In the case of the configuration as described above, the control device 40R is used when each worker K enters the predetermined region NR or MR of the crane 10R, and the control device 40L is configured so that each worker K is a predetermined value of the crane 10L. When entering the area NL or ML, it is desirable to transmit warning information to notify the adjacent worker K ′ of the warning. That is, it is desirable that the worker K is recognized as a common monitoring target by both the control device 40R and the control device 40L. This is because the ID tag data (including worker data) of each worker K and the data relating the ID tag data of the control device 40R and the control device 40L are stored in the storage units 64R and 64L in advance. Can be realized. In addition, although the control apparatus 40 which acquired the proximity | contact information of the proximity | contact worker K 'makes warning information transmit to the alerting | reporting means 50 mounted in the same crane 10 as self, the alerting | reporting means 50 mounted in the other crane 10 is carried out. The warning information may be transmitted by wireless or the like.

  As described above, the heavy machinery contact accident prevention system 1 ′ of this embodiment is a proximity worker who has entered a predetermined area set for each heavy machine even in a large work site where a plurality of heavy machines are arranged in parallel. It is possible to reliably notify K ′ of a warning and prevent a contact accident with a heavy machine.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments described above, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

1, 1 ′ Heavy Equipment Contact Accident Prevention System 10 Crane 11 Upper Revolving Body 12 Boom 13 Cargo Rope 14 Boom Lifting Rope 20 First Antenna 21 Receiver 22 Transmitter 30 Second Antenna 31 Receiver 32 Transmitter 40 Controller 41 Reception unit 42 Transmission unit 43 Input unit 44 Processing unit 45 Storage unit 50 Notification unit 51 Reception unit 52 Notification unit 53 Storage unit 60 Portable notification unit 61 Transmission unit 62 Reception unit 63 Notification unit 64 Storage unit K Worker K 'Proximity worker FD floating dock

Claims (8)

When a heavy machine having at least a boom and an upper turning body, and a nearby worker approaching the heavy machine at a work site enter a predetermined area, the proximity work of the proximity worker is notified to the operator, and the proximity work is performed. It is a heavy machinery contact accident prevention system that notifies warning information to employees,
Portable notification means comprising: a transmission unit that transmits the proximity information based on at least tag information carried by the proximity worker; a reception unit that receives the warning information; and a notification unit that notifies the received warning information;
A first antenna provided in the vicinity of a boom mounting position of the boom or the upper swing body of the heavy machinery;
A second antenna provided on the opposite side to the boom mounting position of the upper swing body of the heavy machinery;
When the first antenna and the second antenna are electrically connected to the first antenna and the second antenna and the proximity information received from the portable notification means is acquired by the first antenna and the second antenna, the warning information is attached to the heavy equipment. A heavy machinery contact accident prevention system comprising a control device that transmits the warning information to the portable notification means via the first antenna or the second antenna, as well as transmitting the warning information to the notification means. The first antenna is
2. The heavy machinery contact accident prevention system according to claim 1, wherein the proximity information of the proximity worker that is an antenna having directivity and enters the predetermined area immediately below the boom is transmitted and received.   2. The heavy machinery contact accident prevention system according to claim 1, wherein the second antenna is an omnidirectional antenna and has a receivable area narrower than the first antenna. The controller is
Calculating a distance from the position of the portable notification means in the predetermined area to the first antenna or the second antenna, and a staying time of the portable notification means in the predetermined area;
The heavy equipment contact accident prevention system according to claim 1, wherein the warning information to be transmitted is changed according to the distance or the staying time. The controller is
When the proximity information is acquired from the first antenna and the second antenna, it is determined whether to control the operation of the heavy machinery from the distance or the stay time,
5. The heavy machinery contact accident prevention system according to claim 4, wherein when the operation of the heavy machinery needs to be controlled, an operation control signal is transmitted to a heavy machinery control system mounted on the heavy machinery. The portable notification means includes
5. The heavy machinery contact accident prevention system according to claim 1, wherein the warning information is notified to the adjacent worker by any one or two of sound, vibration and light, or sound, vibration and light. The portable notification means includes
Based on the warning information changed according to the distance or the staying time, the notification pattern is changed to any two or any one of sound, vibration and light, or sound, vibration and light, and is notified to the adjacent worker. The heavy machinery contact accident prevention system according to claim 4. The first antenna, the second antenna, the control device, and the notification means are respectively installed for a plurality of the heavy machinery,
A plurality of the control devices and the portable notification means are associated so as to be able to transmit and receive,
The plurality of control devices include:
The proximity information of the proximity worker is acquired over a plurality of the heavy equipment, the warning information is transmitted to the notification means of the heavy equipment that has entered the predetermined area, and the warning information corresponds to the warning information. It transmits to the said portable alerting | reporting means of a nearby worker, The heavy machinery contact accident prevention system as described in any one of Claims 1-7 characterized by the above-mentioned.

Images