JP2020190145A - Safety system for construction machine - Google Patents

Abstract

To provide a safety system for a construction machine, capable of securing safety of a worker working around the construction machine by preventing an erroneous operation by a driver.SOLUTION: When a worker terminal held by a worker 56 or a director terminal held by a director 57 is located in a danger range 29, control for making an alarm recognizable by a driver be generated on the basis of terminal information acquired by a communication apparatus 28 and invalidating a driving operation to stop each of a plurality of motions is performed. When the terminal information includes ID information granted to the director, the director terminal receives terminal operation performed by the director and identifies driving operation corresponding to each of the plurality of stopped motions before originating restriction cancellation information for changing over the identified driving operation's state from a state in which the driving operation is invalidated to a validated state. On the basis of the restriction cancellation information, a controller performs control of changing over the identified driving operation's state from the state in which the driving operation is invalidated to the validated state and requesting the driver to perform the identified operation using a notification.SELECTED DRAWING: Figure 6

Description

The present invention relates to a construction machine safety system that communicates with a worker working around the construction machine and gives 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 work around the construction machines, causing contact accidents between the construction machines and the workers. Prevention has become an important issue. Therefore, the work is performed by determining whether or not the worker who has entered the work area set around the construction machine is a collaborator who acts with the construction machine, and if it is not a collaborator, an alarm is generated. An alarm system has been proposed that prevents unnecessary alarms and prevents a decrease in work efficiency while ensuring safety (see, for example, Patent Document 1).

JP-A-2009-193494

As described above, when a construction machine and a worker perform parallel work at the same work place, a conductor who gives a driving instruction to the driver is currently assigned, and the driver performs a driving operation according to the command of the conductor. Is going. However, in the field such as in rainy weather or at night, a situation may occur in which communication between positions separated from each other cannot be achieved well (signals cannot be transmitted). In particular, large pile drivers such as three-point pile drivers tend to have blind spots around them due to their unique shape, and if an incorrect operation is performed, workers engaged in pile replenishment work There is a risk of falling into a dangerous situation.

Therefore, an object of the present invention is to provide a safety system for a construction machine that can prevent erroneous operation by a driver and ensure the safety of workers working around the construction machine.

In order to achieve the above object, the construction machine safety system of the present invention communicates between the construction machine and the workers engaged in the work around the construction machine, and gives an alarm based on the communication. In a machine safety system, a worker terminal carried by the worker, a commander terminal carried by a commander who gives a driving instruction to the driver of the construction machine, and a peripheral of the construction machine mounted on the construction machine. It is composed of the worker terminal located within the set range of the above and a communication device capable of acquiring terminal information including position information and ID information transmitted by the commander terminal, and the construction machine is boarded by the driver. A control device for controlling the operation of the construction machine by operating the operation device provided in the driver's cab is provided, and the control device is used when the worker terminal or the commander terminal is located within the set range. Based on the terminal information acquired by the communication device, an alarm recognizable by the driver is generated, and control is performed to invalidate the driving operation and stop the operation, and the commander terminal is added to the terminal information. When is included, the commander terminal transmits deregulation information that enables the driving operation specified by the commander's operation from the invalid state, and the control device is based on the deregulation information. It is characterized in that the specified driving operation is effectively switched and the driver is notified that the specified driving operation has become effective.

Further, the driver's cab is provided with a release switch for switching the operation operation from invalid to valid, and the control device is said to be said when the conductor terminal is not included in the terminal information acquired by the communication device. It is characterized in that the operation is effectively switched by the release operation of the release switch.

Further, the construction machine includes a base machine including a lower traveling body provided with a crawler and an upper rotating body provided so as to be able to turn above the lower traveling body, and a vertical movement provided in the front portion of the upper rotating body. A possible working device is provided, and the set range includes a traveling range of the lower traveling body, a turning range of the upper rotating body, and a danger range corresponding to a movable range of the working device around the construction machine. The control device is divided into a plurality of site-specific setting ranges including the above, and the control device is the terminal acquired by the communication device when the worker terminal or the conductor terminal is located in any of the site-specific setting ranges. A control that generates an alarm that can be recognized by the driver based on the information, and invalidates the driving operation related to the setting range for each part where the worker terminal or the conductor terminal is located, and stops the corresponding operation. It is characterized by doing.

Further, the construction machine is a pile driver for creating piles in the ground, and the worker is a person engaged in pile replenishment work around the pile driver.

According to the safety system of the construction machine of the present invention, the operation of the construction machine once stopped is switched from the disabled state to the enabled state in response to the terminal operation performed by the commander, and the driver is notified by notification. Since the control that requires the driving operation specified in is performed, communication between the commander and the driver is ensured before the operation of the construction machine, and the driver's erroneous operation is prevented and the work is performed around the construction machine. It is possible to ensure the safety of the workers who are doing it. In particular, at the site where a pile driver is used, when adding piles, the work can be carried out while sufficiently ensuring the safety of workers and conductors who are directly under the auger, which is a dangerous area. ..

It is a side view of the pile driver to which the safety system which shows one embodiment of this invention is applied. Similarly, it is explanatory drawing which shows the detection state of the worker who is located around the pile driver. It is explanatory drawing which shows the detection state of the worker who is also located in the setting range. It is explanatory drawing which shows the detection state of a plurality of workers also located in the setting range. Similarly, it is explanatory drawing which shows the state which divided the setting range by part. It is explanatory drawing which shows the detection state of the conductor and the worker who are also located in the setting range.

1 to 6 show that the safety system of the present invention is applied to a pile driver which is one of construction machines, and the pile driver 11 is a lower traveling body provided with a crawler 12a as shown in FIG. A base machine 14 composed of an upper swivel body 13 rotatably provided on the upper part of the lower traveling body 12 and the lower traveling body 12, an undulating leader 15 provided on the front portion of the upper swivel body 13, and a front of the leader 15. A pair of left and right guide pipes 16 and 16 provided parallel to the longitudinal direction of the leader 15 and a plurality of guide gives that slidably hold the outer surface side of each of the guide pipes 16 and 16 in the width direction of the base machine. To suppress the runout of an auger 18 which is one of the working devices provided so as to be able to move up and down and rotate along the front surface of the reader 15 via the auger 17 and a rod or a steel pipe pile which is driven by the auger 18 and rotates. Is provided with a lower vibration damping member 19 provided so as to be able to move up and down along the lower front surface of the leader 15.

A driver's cab 20 on which the driver rides is installed in the front part on one side of the upper swing body 13, and a plurality of winches including a main winding winch and a supplementary winding winch (not shown) are in the central part of the upper swing body 13. ) Is provided, and a pair of left and right back stays 23, 23 that support the counterweight 21, the gantry 22, and the leader 15 are provided at the rear of the upper swing body 13. The main winding rope 24 from the main winding winch is connected to the auger 18 via a top sheave block 25 provided on the top of the leader 15, and the auger 18 can be raised and lowered by operating the main winding winch. The auxiliary winding rope 26 from the auxiliary winding winch is connected to the lower anti-vibration member 19 via the top sheave block 25, and the lower anti-vibration member 19 can be raised and lowered by operating the auxiliary winding winch. Further, jacks 27 for stabilization are provided at four locations on the front, rear, left and right sides of the upper swing body 13.

In the driver's cab 20, there are operation levers and operation pedals, push button switches and displays, release switches (not shown), etc., which are operation devices for performing a plurality of operations such as running, turning, winch, and auger 18. Devices are centrally located 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 control device is provided. Further, the upper swivel body 13 is connected to a control device and is carried by a worker terminal carried by a worker engaged in work around the pile driver 11 or a command carried by a conductor who gives a driving instruction to the driver. It is equipped with a communication device that communicates with the user terminal. Further, each part of the upper swing body 13 is provided with, for example, a plurality of magnetic field transmission units capable of partitioning a set range around the pile driver 11, and is predetermined by the magnetic field transmission unit during the operation of the pile driver 11. A frequency AC induced magnetic field is transmitted. As a result, the magnetic field detection unit of each terminal located within the set range detects the AC induced magnetic field, so that the terminal information including the position information and the registered ID information (identification information) is transmitted from each terminal. These elements constitute a safety system for the pile driver 11 that gives an alarm based on communication between the pile driver 11 and each terminal.

Here, with reference to FIGS. 2 to 6, various controls executed by the control device will be described according to the detection state of each terminal located in the set range around the pile driver 11. FIG. 2 shows the detection states of the workers 51 and 52 engaged in the work around the pile driver 11 that has moved to the pile driving construction position. Around the pile driver 11, for example, a circular range (not shown) of 2 m to 5 m is set by a magnetic field transmitter, and a control device receives a signal from a worker terminal within this range. Then, based on the terminal information of the workers 51 and 52 acquired by the communication device 28, the display in the driver's cab 20 indicates that the workers 51 and 52 are in a state of approaching the pile driver 11. As a result, the driver can perform the necessary driving operation while recognizing that the two workers 51 and 52 are nearby.

Further, a circular danger range 29 is set directly below the auger 18 and the lower anti-vibration member 19, and as shown in FIG. 3, for example, when a third worker 53 enters the danger range 29, In the control device, based on the terminal information of the worker 53 acquired by the communication device 28, an alarm that can be recognized by the driver is generated, for example, an alarm by red light emission or voice, and the operation of the winch, the auger 18, etc. The operation is invalidated, and the corresponding operation is performed, that is, the auger 18 is controlled to be lifted and lowered, the rotation drive, and the lower vibration member 19 to be stopped. At this time, when the acquired terminal information does not include the ID information given to the conductor, that is, in the situation where the conductor is absent, the control device receives the release operation of the release switch by the driver and performs the operation operation. Controls switching from the disabled state to the enabled state. As a result, when the worker 53 enters the danger range 29, the driver can visually confirm the safety by getting off the driver's cab 20 and then operating the release switch to perform the driving operation again. become.

Further, the authorized person can be identified based on the ID information, and as shown in FIG. 4, for example, the worker 54 who has the authority to perform the work enters the danger range 29. If this is the case, a normal determination is made by the determination process of the control device, and operation stop control is not performed. On the other hand, when the worker 55 who does not have the authority to perform the work enters the danger range 29, the abnormality judgment is made by the judgment processing of the control device, and the operation stop control is performed without accepting the release operation. It is maintained in the same state. Here, as shown in FIG. 5, the section of the set range includes a rectangular forward range 30, a reverse range 31, and a circular turning range of the upper turning body 13 as the traveling range of the lower traveling body 12, in addition to the danger range 29. 32 and the like can be set as the setting range for each part, and even when the worker is located within these setting ranges for each part, an alarm is similarly generated to control the operation stop. In this case, control may be performed to stop all operations, but for example, when an operator enters the turning range 32, only the turning operation associated with the turning operation is invalidated, and only the turning operation is stopped. It is possible to do. That is, it is possible to control the operation stop for each part.

By the way, when the pile driving work is carried out, it is necessary to allow the worker to enter the danger range 29 because the rods and steel pipe piles buried in the ground are added. In this case, as shown in FIG. 6, the worker 56 and the conductor 57, which gives a driving instruction to the driver based on the progress of the work, are in a state of entering the danger range 29, respectively. In this state, an alarm is generated by receiving terminal information from each terminal carried by the worker 56 and the conductor 57, and the operation stop is controlled by disabling the driving operation. Here, when the terminal information includes the ID information given to the conductor, the conductor terminal raises and lowers and lowers the auger 18 stopped by receiving, for example, a winch operation as a terminal operation performed by the conductor 57. The winch operation corresponding to the raising and lowering of the vibration damping member 19 is specified, and the restriction release information for switching from the disabled state to the enabled state of the specified winch operation is transmitted. Then, in the control device, based on the regulation release information acquired by the communication device 28, the winch operation is switched from the disabled state to the enabled state, and the winch operation is performed by the driver by notification such as display or voice. Control to request. As a result, when the worker 56 works within the danger range 29, the driver can perform only the limited driving operation required by the conductor 57, provided that the conductor 57 is accompanied. become.

As described above, according to the safety system of the construction machine of the present invention, in response to the terminal operation performed by the commander 57, the operation of the construction machine once stopped is switched from the disabled state to the enabled state. Since the control is performed to request the driver to perform the driving operation specified by the notification, the communication between the commander 57 and the driver is ensured before the operation of the construction machine, and the driver's erroneous operation is prevented. The safety of the worker 56 working around the construction machine can be ensured. In particular, at the site where the pile driver 11 is used, when performing the pile replenishment work, the safety of the worker 56 and the conductor 57 who are directly under the auger 18 and the lower vibration member 19 which is the danger range 29 is ensured. You can proceed with the work while securing enough.

Further, even if the instruction of the conductor 57 is not given to the driver, the release operation based on the safety confirmation by the driver is possible, so that the safety of the worker 56 within the danger range 29 is safe. Is secured, and there is no need to worry about a large decrease in work efficiency. Further, by dividing the set range into a plurality of areas such as a forward range 30, a reverse range 31, and a turning range 32 in addition to the danger range 29, the driving operation can be regulated within a necessary range. As a result, it is possible to prevent unnecessary alarms while ensuring work safety. In addition, by applying the safety system of the present invention to the pile driver 11, if the worker needs to enter the danger range 29, this can be tolerated and the pile driving work can proceed safely. ..

In this embodiment, the safety system is applied to a pile driver, but the present invention is not limited to this, and can be widely applied to various construction machines equipped with a vertically movable excavator and a cargo handling device such as a shovel and a crane. .. In addition, the worker terminal may be small and wearable, and the conductor terminal may be, for example, a smartphone, a tablet computer, or the like, in addition to the wireless remote controller capable of inputting information. Various communication terminals can be used. In this case, the position information and ID information of each terminal may be acquired via a network using a positioning device such as GPS. Further, although the setting range is set by generating an induced magnetic field suitable for outdoor use, it can be set based on radio waves, ultrasonic waves, infrared rays, and an image acquired by a camera.

11 ... Pile driver, 12 ... Lower running body, 12a ... Crawler, 13 ... Upper swivel body, 14 ... Base machine, 15 ... Leader, 16 ... Guide pipe, 17 ... Guide give, 18 ... Auger, 19 ... Lower anti-vibration member , 20 ... cab, 21 ... counter weight, 22 ... gantry, 23 ... backstay, 24 ... main winding rope, 25 ... top sheave block, 26 ... auxiliary winding rope, 27 ... jack, 28 ... communication device, 29 ... dangerous Range, 30 ... forward range, 31 ... reverse range, 32 ... turning range, 51, 52, 53, 54, 55, 56 ... worker, 57 ... conductor

Claims (4)

In a construction machine safety system that communicates between a construction machine and workers engaged in work around the construction machine and gives an alarm based on the communication.
A worker terminal carried by the worker, a conductor terminal carried by a conductor who gives a driving instruction to the driver of the construction machine, and a commander terminal carried by the construction machine and located within a set range around the construction machine. It is composed of the worker terminal and a communication device capable of acquiring terminal information including position information and ID information transmitted by the conductor terminal.
The construction machine includes a control device that controls the operation of the construction machine by operating the operation device provided in the driver's cab on which the driver is boarding.
When the worker terminal or the conductor terminal is located within the set range, the control device generates an alarm recognizable by the driver based on the terminal information acquired by the communication device. Control is performed to invalidate the operation and stop the operation.
When the conductor terminal is included in the terminal information, the conductor terminal transmits deregulation information that enables the driving operation specified by the operation of the conductor from the invalid state.
The control device is a construction machine characterized in that the specified driving operation is effectively switched based on the regulation release information and the driver is notified that the specified driving operation has become effective. Safety system. The driver's cab is provided with a release switch for switching the operation operation from invalid to valid, and the control device uses the release switch when the commander terminal is not included in the terminal information acquired by the communication device. The safety system for construction machinery according to claim 1, wherein the operation for effectively switching the operation is controlled by the release operation of the above 1. The construction machine includes a base machine including a lower traveling body provided with a crawler, an upper rotating body provided so as to be rotatable on the upper portion of the lower traveling body, and a vertically movable movable body provided on the front portion of the upper rotating body. Equipped with work equipment
The set range includes a range of travel of the lower traveling body, a swivel range of the upper swivel body, and a danger range corresponding to a movable range of the work device around the construction machine. It is divided into
The control device is an alarm that can be recognized by the driver based on the terminal information acquired by the communication device when the worker terminal or the conductor terminal is located in any of the set range for each part. 1 or 2 is characterized in that the operation is invalidated and the corresponding operation is stopped by disabling the driving operation related to the setting range for each part where the worker terminal or the conductor terminal is located. Described construction machine safety system. The construction machine is a pile driver for creating piles in the ground, and the worker is a person engaged in pile replenishment work around the pile driver, according to claims 1 to 3. The safety system for construction machinery according to any one of the above.

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