JP7258653B2 - Pile driver safety system - Google Patents

Description

The present invention relates to a construction machine safety system that communicates with a worker working around the construction machine and issues an alarm based on the communication.

At construction sites where construction machines such as excavators, cranes, and pile drivers are used, it is common for a large number of workers to be working around the machines, which can lead to accidental contact between the machines and workers. Prevention is an important issue. Therefore, it is determined whether or not a worker who has entered a work area set around the construction machine is a joint worker acting together with the construction machine. An alarm system has been proposed that prevents unnecessary alarms and lowering of work efficiency while ensuring the safety of workers (see, for example, Patent Document 1).

JP 2009-193494 A

As described above, when a construction machine and a worker perform parallel work at the same work location, the worker is aware of the presence of the construction machine and voluntarily works around the construction machine. Therefore, in such a case, if the worker is frequently warned, the worker may rather feel annoyed by the warning. If workers find alarms to be annoying, they become less sensitive to them. Therefore, there is a safety device for construction machinery that ``prevents workers from coming into contact with construction machines by calling attention to workers''. There is a risk that it will not be possible to effectively demonstrate the original purpose of In particular, a large pile driver such as a 3-point type pile driver tends to have blind spots around it due to its unique shape. It is also necessary to allow workers to enter the vicinity directly below the auger because the work of adding steel pipe piles is performed. For this reason, there is a risk that the workers may fall into a dangerous situation due to the lack of attention of the driver of the pile driver or the workers.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a construction machine safety system capable of generating an alarm at an optimum time according to the operating state of a construction machine and ensuring the safety of workers working around the construction machine. .

In order to achieve the above object, the safety system for a pile driver of the present invention comprises a base machine comprising an undercarriage equipped with crawlers and an upper revolving body rotatably provided on top of the undercarriage; A pile driver having jacks provided on the front, rear, left, and right of the revolving body, an auger capable of moving up and down and rotating in front of a leader provided in the front part of the upper revolving body, and the jack being grounded . In a safety system for a pile driver that communicates with a worker engaged in pile replenishment work around the pile driver that is doing pile driving in a state and issues an alarm based on the communication, A communication device mounted on the pile driver , and a worker terminal carried by the worker that receives an alarm signal from the communication device and generates an alarm recognizable by the worker, The pile driver includes a control device that controls the lifting and rotating operation of the auger by operation of an operation device provided in a cab where the driver rides, and the control device controls the operation of the operator terminal. A first alarm mode in which the alarm signal is transmitted when the pile driver is positioned within a set range around the pile driver; and a second alarm mode for transmitting the alarm signal when a driving operation corresponding to either one is performed, and the first alarm mode and the second alarm mode are provided in the driver's cab. It is characterized by being configured so that it can be set by a changeover switch.

Further , the set range includes a plurality of parts including a travel range of the lower traveling body around the pile driver , a turning range of the upper revolving body, and a dangerous range corresponding to the movable range of the auger . It is characterized by being divided into different setting ranges.

According to the construction machine safety system of the present invention, a first alarm mode for generating an alarm under the condition that the worker terminal is positioned within a set range around the construction machine; For example, if the first alarm mode is set while the construction machine is moving toward the working position, the construction machine will not move. Even if there is a worker around who does not recognize the fact that the worker is about to move out or the approach after starting to move, the worker can be alerted by an alarm. On the other hand, if the second alarm mode is set in the work stage after the construction machine has moved to the working position, the operator can work around the construction machine voluntarily while recognizing the existence of the construction machine that has stopped operating. It is possible to prevent unnecessary warnings from being given to workers who are That is, it is possible to generate an alarm at an optimum time according to the operation state of the construction machine, and to ensure the safety of workers working around the construction machine. In particular, at a site where a pile driver is used, a worker engaging in pile replenishment work can react sensitively to an alarm, and the work can proceed while sufficiently ensuring safety.

BRIEF DESCRIPTION OF THE DRAWINGS It is a side view of the pile driver to which the safety system which shows the example of one form of this invention is applied. FIG. 11 is an explanatory diagram showing a detection state of a worker who is positioned within the set range of the pile driver in the same first alarm mode; FIG. 11 is an explanatory diagram showing a state in which the setting range is similarly divided by parts; It is an explanatory view showing the detection state of the worker positioned in the set range similarly in the second alarm mode. FIG. 11 is an explanatory diagram showing a detection state of an operator who is positioned within the set range when a turning operation is performed in the second alarm mode;

1 to 5 show the safety system of the present invention applied to a pile driver, which is one of construction machines. The pile driver 11, as shown in FIG. 12 and a base machine 14 consisting of an upper revolving body 13 rotatably provided on the upper part of the lower traveling body 12; A pair of left and right guide pipes 16, 16 provided parallel to the longitudinal direction of the leader 15 on the part side, and a plurality of guide gibs slidably holding the outer surface sides of the guide pipes 16, 16 in the width direction of the base machine. An auger 18, which is one of the working devices provided to be able to move up and down and rotate along the front surface of the leader 15 via the auger 17, and a rod or steel pipe pile driven by the auger 18 to suppress vibration. A lower anti-vibration member 19 is provided along the lower front surface of the reader 15 so as to be able to move up and down.

A driver's cab 20 is installed in the front part of one side of the upper revolving structure 13, and a plurality of winches (not shown) including a main hoist winch and an auxiliary hoist winch are installed in the central part of the upper revolving structure 13. ) is provided, and a counterweight 21, a gantry 22, a pair of left and right backstays 23, 23 for supporting the leader 15, and the like are provided at the rear portion of the upper rotating body 13. As shown in FIG. A main hoist rope 24 from the main hoist winch is connected to the auger 18 via a top sheave block 25 provided at the top of the leader 15, and the auger 18 can be raised and lowered by operating the main hoist winch. Auxiliary hoisting rope 26 from the auxiliary hoisting winch is connected to lower anti-vibration member 19 through top sheave block 25, and lower anti-vibration member 19 can be raised and lowered by operating the auxiliary hoisting winch. Stabilizing jacks 27 are provided at four locations on the front, rear, left, and right of the upper revolving body 13 .

Inside the operator's cab 20, there are provided operation levers and operation pedals, push button switches, a display, and a mode changeover switch (not shown), which are operation devices for performing multiple operations such as traveling, turning, winch, and auger 18. and other devices are centrally placed near the driver's seat in consideration of operability, and are configured around a controller (CPU) that is connected to these devices and performs various arithmetic processing such as data processing and judgment. A controlled controller is provided. The upper revolving body 13 is also equipped with a communication device that is connected to the control device and communicates with a worker terminal carried by a worker who is engaged in work around the pile driver 11 .

The communication device can divide a dangerous range as a set range around the pile driver 11 by, for example, transmitting an AC induced magnetic field of a predetermined frequency from a built-in magnetic field transmitter. As a result, when the magnetic field detection unit of the worker terminal located within the danger zone detects the AC induction magnetic field, terminal information including position information and registered ID information (identification information) is transmitted from the worker terminal. . Then, in the control device, control is performed so that an alarm signal is transmitted based on the terminal information acquired by the communication device. On the other hand, the operator's terminal receives the alarm signal and is controlled to generate an alarm buzzer or vibrator that can be recognized by the operator.

Further, the control device selectively executes a first alarm mode and a second alarm mode having different execution timings as one of control methods (modes) by receiving an operation detection signal of the mode changeover switch. is controlled. The first alarm mode is a control method that issues an alarm signal when the worker terminal is positioned within the danger zone. This is a control method for transmitting an alarm signal when any one of the driving operations such as slewing, turning, winch, and auger 18 is performed. These elements constitute a safety system for the pile driver 11 that issues an alarm based on communication between the pile driver 11 and the operator's terminal.

Here, with reference to FIGS. 2 to 5, various alarm modes executed by the control device according to the detection state of the worker terminal positioned in the danger zone around the pile driver 11 will be described. First, since the large pile driver 11 has a weight limit during transportation, the components such as the leader 15, the auger 18, and the counterweight 21 are separated from the upper revolving body 13 and separately transported. are assembled and used. When the pile driver 11 is brought into the site, for example, the leader 15 is attached to the front portion of the upper revolving body 13 so as to be able to rise and fall by connecting a plurality of leader members.

The pile driver 11 that has been assembled is powered on, the engine is driven, and the pile driver 11 moves by itself to a position for driving piles. In this movement phase, the first alarm mode is set. FIG. 2 shows detection states of workers 51 and 52 working around the pile driver 11 . Around the pile driver 11, for example, a circular danger zone 28 of 2 m to 5 m is set by the magnetic field transmitter. Upon receiving the signal from the terminal carried by worker 51, the control device causes the communication device 29 to transmit an alarm signal based on the acquired terminal information of worker 51. FIG. At this time, the worker 51 can recognize that the nearby pile driver 11 that is not operating is about to start moving by the alarm issued by his/her own terminal, and the operator 51 can recognize that the pile driver 11 is about to start moving. In this case, it can be recognized that the pile driver 11 is approaching. Here, the control device displays on the display in the driver's cab 20 that the worker 51 is approaching the pile driver 11, and the driver recognizes that the worker 51 is nearby. A necessary driving operation can be performed. Here, no warning is given to the worker 52 who is outside the danger zone 28, but when the worker 52 is positioned inside the danger zone 28 due to the approach of the pile driver 11, the worker 52 is notified by his own terminal. By the alarm, it can be recognized that the pile driver 11 is nearby.

Here, as shown in FIG. 3, the section of the dangerous area 28 includes a fan-shaped forward movement range 30 and a backward movement range 31 as a movement range of the lower traveling body 12 including right under the auger 18 and the lower anti-vibration member 19, and an upper revolving body. 13, such as the right turning range 32 and the left turning range 33, can be set as part-specific setting ranges. Control is performed to call attention to the worker by means of an alarm issued by the terminal.

The pile driver 11 moved to the construction position enters the working stage, and the jacks 27 at four locations are grounded by the jack extension operation, and the pile driving construction is performed in a stable state. Here, when the first alarm mode is switched to the second alarm mode in response to the operation of the mode switching switch by the driver, as shown in FIG. If there is, no warning is issued to the worker 53 who is within the danger zone 28 . As a result, the worker 53 can move the necessary work to the vicinity directly below the auger 18 or the lower vibration-proof member 19 without being alerted while recognizing the presence of the pile driver 11 that is not in operation. , and can be used to replenish rods and steel pipe piles buried in the ground. Then, even if the worker 53 who has finished the work retreats outside the danger zone 28, for example, even if the winch operation corresponding to the lifting of the auger 18 or the lifting of the lower anti-vibration member 19 is performed, the worker 53 No danger.

When the pile driving work is completed, the pile driver 11 is retracted to retract the four jacks 27, and is operated in a direction away from the construction position. At this time, as for the control method, since the second alarm mode remains set, as shown in FIG. When the worker terminal carried by 54 is positioned within the left turn range 33 and when the driver performs a left turn operation as indicated by the arrow A in FIG. An alarm signal is transmitted, and control is performed to alert the worker 54 by an alarm issued by the terminal.

Thus, according to the construction machine safety system of the present invention, the first alarm mode for generating an alarm under the condition that the worker terminal is positioned within the set range around the construction machine; , and a second alarm mode for generating an alarm when a driving operation is performed. Even if there is a worker around who does not recognize that the construction machine is about to start moving or that it is approaching after it starts moving, the worker can be alerted by an alarm. On the other hand, if the second alarm mode is set in the work stage after the construction machine has moved to the working position, the operator can work around the construction machine voluntarily while recognizing the existence of the construction machine that has stopped operating. It is possible to prevent unnecessary warnings from being given to workers who are That is, it is possible to generate an alarm at an optimum time according to the operation state of the construction machine, and to ensure the safety of workers working around the construction machine. In particular, at the site where the pile driver 11 is used, workers engaging in pile replenishment work can respond sensitively to the alarm, and the work can proceed while sufficiently ensuring safety.

Further, by dividing the dangerous area 28 into a plurality of areas such as a forward movement area 30 including directly below the working device, a reverse movement area 31, and left and right turning areas 32 and 33, it becomes possible to issue warnings within the necessary areas. As a result, unnecessary warnings can be prevented while ensuring work safety. In addition, by applying the safety system of the present invention to the pile driver 11, if it is necessary for the worker to enter the danger zone 28, it is possible to allow this and proceed with the pile driving work safely. .

In this embodiment, the safety system is applied to a pile driver, but it is not limited to this, and can be widely applied to various construction machines equipped with vertically movable excavators and cargo handling equipment, such as shovels and cranes. . In addition, the execution timing of various alarm modes can be arbitrarily set. Regarding the first alarm mode, the safety of nearby workers is ensured in situations where a moving construction machine is stopped on the way. In addition, it is particularly useful in situations where periodic maintenance work is performed on construction machines, in that the safety of maintenance workers near the construction machines is ensured. Furthermore, the worker terminal may be small and wearable, such as a wristband type that can be worn on the arm of the worker or a device that can be attached to a helmet. In addition, the position information and ID information of the worker terminal may be obtained via a network using a positioning device such as GPS. Also, the setting range is set by generating an induction magnetic field suitable for outdoor use, but it can also be set based on radio waves, ultrasonic waves, infrared rays, and images acquired by a camera.

DESCRIPTION OF SYMBOLS 11... Piling machine, 12... Lower traveling body, 12a... Crawler, 13... Upper revolving body, 14... Base machine, 15... Leader, 16... Guide pipe, 17... Guide gib, 18... Auger, 19... Lower anti-vibration member , 20... Operator cab, 21... Counterweight, 22... Gantry, 23... Back stay, 24... Main hoisting rope, 25... Top sheave block, 26... Auxiliary hoisting rope, 27... Jack, 28... Danger area, 29... Communication Machine 30 Forward range 31 Backward range 32 Right turning range 33 Left turning range 51, 52, 53, 54 Worker

Claims (2)

A base machine consisting of a lower traveling body equipped with crawlers and an upper revolving body rotatably provided on the upper part of the lower traveling body, jacks provided on the front, back, left and right of the upper revolving body, and the front of the upper revolving body. A pile driver provided with an auger that can be raised and lowered and rotated in front of a leader provided in the part ;
Around the pile driver who is doing pile driving work with the jack grounded , communication is performed with a worker engaged in pile replenishment work, and a pile driver issues an alarm based on the communication. In the aircraft safety system,
A communication device mounted on the pile driver , and a worker terminal carried by the worker that receives an alarm signal from the communication device and generates an alarm that can be recognized by the worker,
The pile driver includes a control device that controls the lifting and rotating operation of the auger by operating an operation device provided in a driver's cab,
The control device has a first alarm mode for transmitting the alarm signal when the operator terminal is positioned within a set range around the pile driver , and a first alarm mode for transmitting the alarm signal when the operator terminal is positioned within the set range, and selectively executing a second alarm mode in which the alarm signal is transmitted when a driving operation corresponding to either lifting or rotating operation of the auger is performed,
A safety system for a construction machine, wherein the first alarm mode and the second alarm mode are settable by a selector switch provided in the cab. The set range includes a plurality of section-specific set ranges including a travel range of the lower traveling body around the pile driver , a turning range of the upper revolving body, and a dangerous range corresponding to the movable range of the auger . 2. The safety system for a pile driver according to claim 1, wherein the safety system is divided into .

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