JP7522283B2 - Automatic stop assist device for construction machinery and vehicles - Google Patents

Description

The present invention relates to technology related to construction machinery vehicles (vehicle-mounted construction machinery), and to technology for improving safety in construction machinery vehicles that are provided with operation controls for performing work using the construction machinery at a position away from the driver's seat.

An example of a construction machinery vehicle is a road cutting vehicle that cuts the road surface with a road cutting machine (construction machinery) while traveling and is equipped with a cuttings transport device (such as a belt conveyor) that transports the cuttings in the fore-and-aft direction of the vehicle body.
The road milling vehicle has a structure described in, for example, Patent Document 1. That is, this road milling vehicle is self-propelled by front and rear wheels for running, and can cut the road surface with a road milling machine (cutter unit) that is mounted on the vehicle body so that it can rise and fall. While self-propelled, the road milling vehicle cuts (chips) the asphalt pavement surface with the road milling machine, and continuously transports the cut waste material to the front of the vehicle body or the like by a transport conveyor.

In such construction machinery vehicles, for example, a driver's seat is provided on the upper part of the vehicle body, and a number of driving controls for driving the vehicle are arranged around the driver's seat, and a worker drives the vehicle on public roads by operating the driving controls.
In addition, such a construction machine vehicle has a plurality of operation controls for performing work using the construction machine located at a position away from the driver's seat. When performing construction work, a worker operates the operation controls of the operation control unit to operate the construction machine while moving the vehicle appropriately for the construction work.

Japanese Patent Application Publication No. 11-50415

In the case of a construction machinery vehicle as described above, in which the positions of the controls used to operate the vehicle when traveling on public roads (for example, when being driven on a public road) are different from the positions of the controls used when working with the construction machinery at a work site, when traveling on public roads, the worker can immediately notice unexpected vehicle behavior caused by an operating error by the worker through displays on a display panel or the like provided on the driver's seat panel.
For example, if a worker who is seated in the driver's seat and operating the vehicle notices that the vehicle is moving slightly forward or backward when the vehicle is stopped, the worker can check whether the forward/reverse lever is in the neutral position and take appropriate action. Also, if the vehicle is stopped on a slope such as a hill, the worker can take action such as activating the parking brake device.

On the other hand, in the case of a construction machinery vehicle in which the driving operating position when traveling on public roads is different from the operating position of the construction machinery during construction work, when performing construction work, the worker generally gets off the driver's seat onto the road surface and operates the construction machinery from the operating position for work and performs vehicle movement operations required for construction work.
In this case, when a worker gets out of the driver's seat to perform construction work, the larger the construction machinery vehicle, the more difficult it becomes to check the status of the display panel and driver's controls around the driver's seat, and the worker rarely proactively checks the status around the driver's seat.

In the case of a construction machine vehicle such as a road cutting vehicle, the vehicle can also be moved when the construction machine is operated during construction work. For this reason, the forward/reverse lever around the driver's seat is placed in the neutral position, the work main switch is turned on to switch from the transport mode to the work mode, and then the driver gets off the seat to carry out work using the construction machine.
Furthermore, if a worker is careless and, for example, gets out of the driver's seat without turning on the parking lever located around the driver's seat and checks the work site, he or she may not notice the unexpected vehicle behavior.
In order to prevent such a situation, it is possible to have another worker always be at the driving operation position. However, this poses a problem in that it results in unnecessary labor costs because no work is required at the driving operation position (driver's seat) during work.

The present invention was developed with the above points in mind, and aims to avoid vehicle behavior caused by carelessness on the part of workers.

In order to solve the problem, one aspect of the present invention is a construction machinery vehicle that is a vehicle equipped with a construction machine, and is equipped with a driver's seat periphery where multiple driving controls for vehicle travel are arranged, and a work operation unit that is arranged in a location away from the driver's seat periphery and where multiple work controls for performing work using the construction machine are arranged, and the multiple driving controls include a forward/reverse operation control that instructs forward, reverse, and neutral travel of the vehicle, a parking brake operation control that instructs operation of a parking brake device, and a service brake operation control that instructs operation of a service brake device, and the work .... The vehicle includes a forward/reverse operation button that instructs the vehicle to move to the neutral position and a parking brake operation button that instructs the vehicle to operate a parking brake device, and further includes a transmission that can cut off the power transmission between the engine and the drive wheels when a neutral position is instructed from the two forward/reverse operation buttons, a neutral position state determination unit that determines whether the transmission is in a neutral position state in which the power transmission between the engine and the drive wheels is cut off, a vehicle speed detection unit that detects the vehicle speed of the vehicle, and a neutral position stop assist unit that executes a process to brake the wheels when the neutral position state determination unit determines that the vehicle is in the neutral position and that the vehicle is moving based on the detection by the vehicle speed detection unit.

Another aspect of the present invention is an automatic stop assist device for a construction machinery vehicle, which is a vehicle equipped with a construction machine, and which includes a driver's seat periphery where multiple driving controls for vehicle travel are arranged, and a work operation section arranged away from the driver's seat periphery and where multiple work controls for performing work using the construction machine are arranged, and the gist of the device is that when it is determined that no worker is present in the driver's seat and the transmission is in a neutral position where the power transmission between the engine and the drive wheels is cut off, and when movement of the vehicle is detected, braking is applied to the wheels.

According to one aspect of the present invention, if the vehicle is detected moving while the transmission, which is controlled by the forward/reverse operation switch, is in the neutral position, the brakes are automatically applied. This makes it possible to avoid unexpected vehicle behavior due to carelessness on the part of the worker.

1 is a side view showing a vehicle configuration according to an embodiment of the present invention. FIG. 1 is a conceptual diagram showing a control system and a braking system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of an automatic stop assistance device.

Next, an embodiment of the present invention will be described with reference to the drawings.
In this embodiment, a road cutting vehicle equipped with a road cutting device (construction machine) will be described as an example of a construction machine vehicle.
The present invention is applicable to any construction machinery vehicle in which the driving operation position when traveling on public roads (also described as when being transported on public roads) is different from the work operation position for the construction machinery at the work site, and the operator provided at the work operation position can also be used to operate the movement of the vehicle.

(composition)
1, a road milling vehicle 1 of this embodiment includes a vehicle body 2, wheels 6 for traveling, and a road milling device (construction machine). A driver's seat 9 is provided on the upper part of the vehicle body.
A plurality of driving controls for vehicle travel are provided around the driver's seat 9. Also, an instruction panel 21 and other work operation units on which a plurality of work controls for performing work using the construction machine are arranged are provided on the side of the vehicle body 2.

<Road surface cutting equipment (construction machinery)>
In this embodiment, the road milling device (construction machine) includes a road milling machine 3 supported on a vehicle body 2 so as to be capable of ascending and descending, an actuator 4 for ascending and descending the road milling machine 3, and a transport conveyor extending in the front-rear direction of the vehicle body. 5 and is provided.
The transport conveyor 5 is a conveyor that transports the cutting waste material cut by the road surface cutting machine 3 forward in the front-rear direction of the vehicle body 2, and is supported by the vehicle body 2. In a cutting operation state in which the road surface is cut, as shown in FIG. As shown in FIG. 1, the transport conveyor 5 is set in a state in which it extends forward in the longitudinal direction of the vehicle body, so that cutting waste material produced by cutting can be transported to the bed of a truck or the like.

The road milling machine 3 is disposed under the vehicle body 2, between the front wheels 6A and the rear wheels 6B. The road milling machine 3 is configured by providing a large number of cutter bits on the peripheral surface of a cutter drum whose axis faces in the vehicle body width direction. The cutter drum is rotatably supported by a machine frame 7, and is configured to be rotatably driven by a hydraulic motor (not shown). The machine frame 7 is, for example, a box-shaped frame body that is open at the bottom.
The actuator 4 that raises and lowers the road milling machine 3 consists of a pair of left and right lifting hydraulic cylinders. Each lifting hydraulic cylinder is attached to the vehicle body 2 with the cylinder body facing up and down, and a cylinder rod extends downward from the cylinder body. The tip of the cylinder rod is connected to the machine frame 7. This adjusts the vertical position of the machine frame 7, i.e., the road milling machine 3, relative to the vehicle body 2 (position relative to the road surface) according to the stroke amount of the lifting hydraulic cylinder, and adjusts the cutting depth by the road milling machine 3. The position of the road milling machine 3 is adjusted to either an upper standby position or a lower position during cutting work.

In addition, a third hydraulic cylinder (not shown) is provided which is oblique to the vehicle width direction and connects the lower part of the vehicle body to the machine frame 7, and by driving the third hydraulic cylinder, the vehicle width direction position of the machine frame 7, i.e., the road surface milling machine 3, can be shifted left and right. Note that each cylinder body of the lifting hydraulic cylinders is supported by the vehicle body in a state in which it can swing at least in the vehicle width direction.
Here, the front side of the machine frame 7 is connected to the vehicle body 2 via parallel links 8 extending in the front-rear direction of the vehicle body 2. A pair of parallel links 8 is disposed on each side in the vehicle width direction. By providing the parallel links 8, the machine frame 7 is designed to maintain a constant posture when raised and lowered.

<Vehicle drive and braking systems>
The road cutting device 30 such as the road cutter 3 described above is driven by power from an engine 32, and the lifting and rotation of the road cutter 3 are controlled by a construction machine control unit 31 including a hydraulic circuit (see Figure 2).
The construction machine control unit 31 can be executed by instructions from operators such as buttons provided on a work instruction panel 21. The instruction panel 21 is provided in a work operation unit 40, and some of the work operators are provided on the instruction panel 21.

As shown in FIG. 2, the wheels 6 for traveling in this embodiment are composed of front wheels 6A provided at the front of the vehicle body 2 and rear wheels 6B provided at the rear of the vehicle body 2. The front wheels 6A can be steered by operating the steering wheel. The axles of the rear wheels 6B are connected to the engine 32 via the transmission 34, and constitute driving wheels that are rotated and driven by the driving force from the engine 32. The power of the engine 32 is also used as a hydraulic driving source that drives the above-mentioned road cutting device 30 (construction machine).

Further, the drive wheels 6B are provided with a parking brake device 36 that applies a braking force to the drive wheels 6B, and a service brake device 37.
As various control units, as shown in FIG. 2 , there are provided an engine control unit 33 that controls the operation of the engine 32, a transmission control unit 35 that controls the transmission 34, a parking brake braking control unit 38 that controls the parking brake device 36, and a service brake braking control unit 39 that controls the service brake device 37.
The vehicle also includes a plurality of driving operators and a plurality of work operators for instructing the operation of the vehicle.

<Driving controls>
A plurality of driving operators are arranged in the driver's seat periphery 50. The driving operators are operators for driving the vehicle, and can be operated by an operator seated in the driver's seat 9.
In this embodiment, the driving operators include an engine switch 44, a forward/reverse lever 45, an accelerator pedal 46, a steering wheel 47, a brake lever 48, a foot brake 49, and a main work switch 51, as shown in FIG.

The engine switch 44 is an operator that supplies an instruction to start/stop the engine 32 to the engine control unit 33 .
The driver's side forward/reverse lever 45 is an operator for indicating the vehicle travel direction, has a forward position, a neutral position, and a reverse position, and supplies set travel direction information to the transmission control unit 35. The instruction information of the driver's side forward/reverse lever 45 is also supplied to the work main switch 51.

The accelerator pedal 46 is an operator for instructing the vehicle speed, and supplies the vehicle speed instruction to the engine control unit 33 .
The steering wheel is an operator that indicates the steering direction.
The brake lever 48 is a parking brake operator, and a parking brake command is supplied to the parking brake control unit 38 .
The foot brake 49 is a service brake operator, and a service brake command is supplied to the service brake control unit 39 .

The work main switch 51 is a switch for switching between a work mode and a deadheading mode.
By turning on the work main switch 51, the instructions of the work operators become valid.
The work main switch 51 is capable of supplying information thereto to the construction machine control unit 31. The work main switch 51 in this embodiment is capable of switching to the work mode only when the forward/reverse lever 45 on the driver's side is in the neutral position.

<Operation controls>
The multiple work operators are operators that give instructions for work operations using a construction machine, and are arranged in a work operation unit 40 that is separated from the driver's seat periphery 50. The work operation unit 40 in this embodiment is located at a position where it can be operated by a worker who is positioned on the road surface after getting off the vehicle.
In this embodiment, instructions for operating a work using a construction machine include instructions for the construction machine (road surface cutting device 30) itself and instructions regarding vehicle movement associated with the work.
In this embodiment, as shown in FIG. 2, the work operators include a forward/reverse lever 41 for work, a parking brake switch 42, and various operators 43 for construction machinery.
The work forward/reverse lever 41 is an operator that indicates the vehicle travel direction, has a forward position, a neutral position, and a reverse position, and supplies set travel direction information to the transmission control unit 35.
The parking brake switch 42 is a parking brake operator, and a parking brake command is supplied to the parking brake braking control unit 38 .
The various operators 43 for construction machinery are operators that instruct various operations of the road cutting device 30, and the instruction information is supplied to the construction machinery control unit 31. The various operators 43 for construction machinery, for example, instruct the lifting and lowering and rotational drive of the road cutting machine 3.

<Control Unit>
The engine control unit 33 is driven when an engine switch 44 is turned on. The engine control unit 33 executes drive control of the engine 32 based on an instruction from an accelerator pedal 46 or the like.
The transmission control unit 35 controls the state of the transmission 34 based on the instructions of the driving forward/reverse lever 45 and the work forward/reverse lever 41. In the work mode (work main switch 51: ON), the instructions of the work forward/reverse lever 41 take priority, and in the deadheading mode (work main switch 51: OFF), the instructions of the driving forward/reverse lever 45 take priority.
The parking brake braking control unit 38 controls the braking of the parking brake device 36 .
The service brake braking control unit 39 controls the braking of the service brake device 37 .
The construction machinery control unit 31 operates when the work main switch 51 indicates work mode, and controls the operation of the construction machinery (road surface cutting device 30) in accordance with instructions from the various construction machinery operators 43.

<Automatic stop assist device 60>
This embodiment also includes an automatic stop assist device 60 .
When the automatic stop assist device 60 estimates that no worker is present in the driver's seat 9 and determines that the transmission 34 is in a neutral position in which power transmission between the engine 32 and the drive wheels 6B is cut off, and detects movement of the vehicle, it executes a process of applying brakes to the wheels. It is preferable that the automatic stop assist device 60 is configured to execute a process of applying brakes to the wheels 6B and to issue an alarm to the worker that the vehicle is moving.
For example, when the work main switch 51 is turned on and the work mode is set, it is presumed that no worker is present in the driver's seat 9. In addition, when the driver's seat 9 has a seat occupancy sensor, it may be presumed whether or not there is no worker in the driver's seat 9 by detection by the seat occupancy sensor.
As shown in FIG. 3 , the automatic stop assist device 60 includes a vehicle speed detection unit 61 , a neutral position state determination unit 62 , and a neutral position stop assist unit 63 .

<Vehicle speed detection unit 61>
The vehicle speed detection unit 61 detects the vehicle speed of the vehicle. The vehicle speed detection unit 61 is composed of, for example, a proximity sensor or a rotary sensor that detects the number of teeth of a gear that is constantly meshed with the running wheels 6A.

<Neutral position state determination unit 62>
The neutral position state determination unit 62 executes a process of determining whether or not the transmission 34 is in a neutral position state in which the power transmission between the engine 32 and the drive wheels 6B is cut off.
The neutral position state determination unit 62 determines whether the transmission 34 is in the neutral position state, for example, based on whether the two forward/reverse levers 41, 45 are both in the neutral position indicating state. The neutral position state determination unit 62 may directly determine whether the transmission 34 is in the neutral position state, for example, based on a shift signal from the transmission control unit 35.
Alternatively, the neutral position state determination unit 62 determines that the vehicle is in the neutral position state, for example, when the work main switch 51 is on and in work mode, the instruction of the work main switch 51 indicates that the forward/reverse lever 41 in the work operation unit 40 has priority, and the forward/reverse lever 41 in the work operation unit 40 is in an instruction state for the neutral position.

<Neutral position stop assist unit 63>
The neutral position stop assist unit 63 executes a process of braking the wheels when the neutral position state determination unit 62 determines that the vehicle is in the neutral position state and also determines that the vehicle is moving based on detection by the vehicle speed detection unit 61 .
For example, when the vehicle speed detected by the vehicle speed detection unit 61 is greater than zero, it is determined that the vehicle is moving.

The neutral position stop assist unit 63 of this embodiment includes a service brake braking control processing unit 63A, a parking brake braking control processing unit 63B, and an engine stopping unit 63C.
When the neutral position state determination unit 62 determines that the vehicle is in the neutral state and determines that the vehicle is moving based on the detection by the vehicle speed detection unit 61, the service brake braking control processing unit 63A supplies a braking command to the service brake device 37 via the service brake braking control unit 39, thereby putting the service brake device 37 into a braking state.

After the service brake device 37 is activated by the operation of the service brake control processing unit 63A, and when it is determined that the vehicle has stopped, the parking brake braking control processing unit 63B supplies a braking command to the parking brake device 36 via the parking brake braking control unit 38, thereby putting the parking brake device 36 into a braking state.
If the engine stop unit 63C detects no change in the instruction of any of the above-mentioned operators within a predetermined time period after the parking brake braking control processing unit 63B is activated and the parking brake device 36 is activated, that is, if it determines that no vehicle operation is being performed, it supplies an engine stop command to the engine control unit 33 that controls the vehicle's engine 32 and executes processing to stop the engine 32.
The preset time period depends on the construction machine vehicle in question, but may be, for example, 10 to 20 minutes.
The automatic stop assist device 60 may be configured to end the process when it detects a change in any of the controls after activation.

(Action etc.)
In the construction machinery vehicle of this embodiment, when the vehicle is stopped and the forward/reverse levers 41, 45 are in neutral, if movement of the vehicle is detected, the wheel braking device is automatically activated and the vehicle is automatically stopped.
In particular, when a worker gets off the driver's seat 9 to prepare for work, if the worker inadvertently forgets to operate the brake lever 48 (parking brake) and gets off the vehicle, the vehicle will not move if the location where the vehicle is parked is flat, but if the location where the vehicle is parked is on a slope, the vehicle will start to move and abnormal vehicle behavior will occur.
In contrast, in this embodiment, when the automatic stop assist device 60 detects that the vehicle is moving when the transmission 34 is in neutral, it can automatically apply the brakes to prevent unexpected vehicle behavior.

At this time, in this embodiment, during automatic braking, the service brake device 37 is first activated to brake and stop the vehicle, and then the parking brake device 36 is activated to reliably stop the movement of the vehicle.
If an operator notices the vehicle moving and operates the brakes or instructs the vehicle to shift forward, the processing of the automatic stop assist device 60 is terminated. However, if the operator does not operate any of the controls (no vehicle operation is performed), it is assumed that the operator has no intention of operating the vehicle, and the engine 32 is stopped.

(effect)
This embodiment provides the following advantages.
(1) This embodiment is a construction machinery vehicle that is a vehicle equipped with a construction machine, and is equipped with a driver's seat surrounding area 50 in which a plurality of driving operators for vehicle travel are arranged, and a work operation unit 40 that is arranged at a location away from the driver's seat surrounding area 50 and in which a plurality of work operators for performing work using the construction machine are arranged, and the plurality of driving operators include a forward/reverse operator that instructs forward/reverse/neutral travel of the vehicle, a parking brake operator that instructs operation of a parking brake device, and a service brake operator that instructs operation of a service brake device, and the work operators include a forward/reverse operator that instructs forward/reverse/neutral travel of the vehicle, and a parking brake operator that instructs operation of the parking brake device, and further, The vehicle is equipped with a transmission 34 capable of cutting off power transmission between the engine 32 and the driving wheels 6B upon a neutral position instruction from a reverse operation device, a parking brake device 36 that brakes the wheels upon a braking instruction from the two parking brake operation devices, a service brake device 37 that brakes the wheels upon a braking instruction from the service brake operation device, a neutral position state determination unit 62 that determines whether the transmission 34 is in a neutral position state in which power transmission between the engine 32 and the driving wheels 6B is cut off, a vehicle speed detection unit 61 that detects the vehicle speed of the vehicle, and a neutral position stop assist unit 63 that executes a process of braking the wheels when the neutral position state determination unit 62 determines that the vehicle is in the neutral position state and determines that the vehicle is moving based on the detection by the vehicle speed detection unit 61.

According to this configuration, when an operator stops the vehicle without activating the parking brake device or the like, the transmission 34 is in a neutral position, and if the vehicle moves, the brakes are applied to the vehicle to automatically stop it.
This makes it possible to avoid unexpected vehicle behavior due to carelessness on the part of the worker.

(2) The neutral position state determination unit 62 executes this by, for example, determining whether or not the vehicle is in the neutral position state based on whether or not both of the forward/reverse operation controls are in a state indicating the neutral position.
With this configuration, it is possible to determine that the transmission 34 is in the neutral position.

(3) In this embodiment, the driving operator has a work main switch 51 that enables the operation of the work operator, and the neutral position state determination unit 62 determines that the vehicle is in a neutral position when the state of the work main switch 51 is an instruction state that enables the operation of the work operator and when the forward/reverse operator in the work operation unit 40 is in an instruction state for the neutral position.
According to this configuration, when it is estimated that no operator is present in the driver's seat 9, the transmission 34 is in a neutral position, and if the vehicle moves, the brakes are applied to the vehicle to automatically stop it.
In other words, it is difficult for an operator to immediately notice vehicle behavior caused by carelessness, and it is possible to prevent unexpected vehicle behavior.

(4) In this embodiment, the neutral position stop assist unit 63 includes a service brake braking control processing unit 63A that activates the service brake device 37 when the neutral position state determination unit determines that the vehicle is in the neutral position state and determines that the vehicle is moving based on detection by the vehicle speed detection unit 61.
According to this configuration, when the vehicle starts to move, braking is first performed by the service brake device to stop the vehicle.

(5) In this embodiment, the neutral position stop assist unit 63 includes a parking brake braking control processing unit 63B that activates the parking brake device 36 after the service brake device 37 is activated by operation of the service brake braking control processing unit 63A and when it is determined that the vehicle has stopped.
According to this configuration, once the vehicle is stopped by the service brake device, the parking brake device is activated to more reliably maintain the vehicle stopped.
The parking brake device may be activated without activating the service brake device.

(6) In this embodiment, the neutral position stop assist unit 63 is equipped with an engine stop unit 63C that supplies an engine stop command to the engine control unit 33 that controls the vehicle engine 32 when no change in instruction of either the driving operator or the work operator is detected within a predetermined time after the parking brake braking control processing unit 63B is activated to activate the parking brake device.
According to this configuration, if the worker does not operate the vehicle for a certain period of time after the vehicle is automatically stopped, the engine 32 can be stopped as it is determined that the worker will not be performing work using the construction machine immediately.

(7) In this embodiment, the automatic stop assist device 60 for a construction machinery vehicle is a vehicle equipped with a construction machine, and includes a driver's seat surrounding area 50 in which a plurality of driving controls for vehicle travel are arranged, and a work operation unit 40 arranged at a location away from the driver's seat surrounding area 50 and in which a plurality of work controls are arranged for performing work using the construction machine, and when it is determined that no worker is present in the driver's seat 9 and the transmission 34 is in a neutral position in which power transmission between the engine 32 and the drive wheels 6B is cut off, and when movement of the vehicle is detected, braking is applied to the wheels.
According to this configuration, when an operator gets off the vehicle without applying the parking brake or the like, the brakes are automatically applied when the vehicle's movement is detected, thereby making it possible to avoid unexpected vehicle behavior.

(8) In this embodiment, the multiple driving operators include a forward/reverse operator that instructs the vehicle to travel forward, reverse, or in neutral, a parking brake operator that instructs the operation of a parking brake device, and a service brake operator that instructs the operation of a service brake device, and the multiple work operators include a forward/reverse operator that instructs the vehicle to travel forward, reverse, or in neutral, and a parking brake operator that instructs the operation of the parking brake device.
According to this configuration, in a configuration in which the vehicle can be moved even during work, when an operator gets off the vehicle without applying the parking brake device, etc., the brakes are automatically applied when vehicle movement is detected, thereby avoiding unexpected vehicle behavior.

1 Road milling vehicle 2 Vehicle body 3 Road milling machine 5 Transport conveyor 6A Front wheels 6B Rear wheels (drive wheels)
9 Driver's seat 21 Indicator panel 30 Road cutting device (construction machinery)
31 Construction machine control unit 32 Engine 33 Engine control unit 34 Transmission 35 Transmission control unit 36 Parking brake device 37 Service brake device 38 Brake control unit for parking brake 39 Brake control unit for service brake 40 Work operation unit 41 Forward/reverse lever for work (forward/reverse operation member)
42 Parking brake switch (parking brake operator)
43 Various operation devices for construction machinery 44 Engine switch 45 Forward/reverse lever for driving (forward/reverse operation device)
46 Accelerator pedal 47 Steering wheel 48 Brake lever (parking brake operator)
49 Foot brake (service brake operator)
50 Driver's seat surroundings 51 Work main switch 60 Automatic stop assist device 61 Vehicle speed detection unit 62 Neutral position state determination unit 63 Neutral position stop assist unit 63A Service brake braking control processing unit 63B Parking brake braking control processing unit 63C Engine stop unit

Claims (3)

An automatic stop assist device for a construction machinery vehicle, which is a vehicle equipped with a construction machinery, comprising: a driver's seat peripheral portion around the driver's seat in which a plurality of driving operators for vehicle travel are arranged; and a work operation portion arranged at a location away from the driver's seat peripheral portion and in which a plurality of work operators for performing work using the construction machinery are arranged,
When it is presumed that no operator is present in the driver's seat and it is determined that the transmission is in a neutral position in which the power transmission between the engine and the drive wheels is cut off, if the movement of the vehicle is detected, braking is applied to the wheels ;
The driving operation device includes a work main switch for switching between a work mode and a deadheading mode, and when the work main switch is turned on, the instruction of the work operation device is enabled.
When the work main switch is on, it is assumed that no operator is present in the driver's seat.
An automatic stopping assist device for a construction machinery vehicle. An automatic stop assist device for a construction machinery vehicle, which is a vehicle equipped with a construction machinery, comprising: a driver's seat peripheral portion around the driver's seat in which a plurality of driving operators for vehicle travel are arranged; and a work operation portion arranged at a location away from the driver's seat peripheral portion and in which a plurality of work operators for performing work using the construction machinery are arranged,
When it is presumed that no operator is present in the driver's seat and it is determined that the transmission is in a neutral position in which the power transmission between the engine and the drive wheels is cut off, if the movement of the vehicle is detected, braking is applied to the wheels ;
A seating sensor is provided in the driver's seat, and whether or not an operator is present in the driver's seat is estimated based on the detection by the seating sensor.
An automatic stopping assist device for a construction machinery vehicle. The plurality of driving operators include a first forward/reverse operation operator for instructing forward, reverse, and neutral driving of the vehicle, a parking brake operation operator for instructing operation of a parking brake device, and a service brake operation operator for instructing operation of a service brake device,
The plurality of work operators include a second forward/reverse operation operator for instructing forward, reverse, and neutral travel of the vehicle, and a parking brake operation operator for instructing operation of a parking brake device.
3. An automatic stop assist device for a construction machine vehicle according to claim 1 or 2 .

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