JP7368313B2 - construction machinery vehicle - Google Patents

Description

The present invention relates to technology related to construction machinery vehicles (vehicle-based construction machinery), and relates to safety in construction machinery vehicles that are provided with a work operator for performing work using the construction machinery at a position remote from the driver's seat. Regarding technology to increase

An example of a construction machinery vehicle is a road cutting vehicle equipped with a cutting object conveying device (belt conveyor, etc.) that cuts the road surface with a road cutting machine (construction machine) while traveling and conveys the cutting objects in the longitudinal direction of the vehicle body. I can give an example.
The road surface cutting vehicle has a structure described in, for example, Patent Document 1. That is, this road surface cutting vehicle is capable of self-propelling with front and rear wheels for running, and is also capable of cutting the road surface with a road surface cutting machine (cutter section) provided to the vehicle body so as to be movable up and down. Then, while the road cutting vehicle is self-propelled, the road cutting machine scrapes the asphalt pavement surface, and the scraped cutting waste is continuously conveyed to the front of the vehicle body by a conveyor.

Such construction equipment vehicles, for example, have a driver's seat provided in the upper part of the vehicle body, and a plurality of operating controls for driving the vehicle are arranged around the driver's seat, and workers operate the operating controls. Drive on public roads.
Further, in such a construction machinery vehicle, a plurality of work operators for performing work using the construction machinery are arranged at a position away from the vicinity of the driver's seat. When performing construction work, a worker operates a work operator of the work operation section to operate the construction machine while appropriately moving the vehicle for the construction work.

Japanese Patent Application Publication No. 11-50415

As mentioned above, the location of the controls used to perform driving operations when driving on public roads (for example, when forwarding on public roads) is different from the location of the controls used when working with construction machinery at a work site. In the case of a construction machinery vehicle, when driving on public roads, the worker can immediately notice unexpected vehicle behavior due to an operator's operational error through a display on a display panel provided on the driver's seat panel.
For example, if a worker who is operating a vehicle while seated in the driver's seat, notices that the vehicle is moving slightly forward or backward when the vehicle is stopped, the worker may This can be dealt with by checking whether the forward/reverse lever is in the neutral position. Furthermore, if the place where the vehicle has stopped is on a slope such as a slope, the worker can take actions such as activating the parking brake device.

On the other hand, in the case of construction machinery vehicles where the operation position when driving on public roads is different from the operation position of the construction machine during construction work, when performing construction work, the worker generally steps down from the driver's seat to the road surface and starts working. Operates construction machinery at designated operating positions and performs vehicle movement operations associated with construction work.
At this time, when a worker gets off the driver's seat to perform construction work, the larger the construction machinery vehicle, the more difficult it is to check the status of the display panel and operation controls around the driver's seat. Therefore, they rarely check the conditions 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 operating the construction machine during construction work. For this reason, the driver puts the forward/reverse lever around the driver's seat in the neutral position, turns on the main work switch to switch from the forwarding mode to the work mode, and then gets out of the driver's seat and starts working with the construction machine.
If a worker is careless and, for example, gets out of the driver's seat and checks the work site without turning on the parking lever located around the driver's seat, the worker may not notice the sudden vehicle behavior. Sometimes.
Furthermore, in order to prevent such a situation, it may be possible to have another worker always at the operating position. However, since there is no work required at the operating position (driver's seat) during the work, there is a problem that only unnecessary labor costs are incurred.

The present invention has been made with attention to the above-mentioned points, and an object of the present invention is to avoid vehicle behavior caused by worker's carelessness.

In order to solve the problem, one aspect of the present invention is a construction machinery vehicle that is a vehicle equipped with construction machinery, and includes a region around a driver's seat where a plurality of driving operators for running the vehicle are arranged, and a region around the driver's seat. A construction machinery vehicle comprising: a work operation section located at a location away from the section, and in which a plurality of work operators for performing work using the construction machine are arranged, the plurality of operation operators as the plurality of operation operators; , a forward/reverse operator that instructs the vehicle to move forward, backward, or neutral; a parking brake operator that instructs the operation of the parking brake device; and a service brake operator that instructs the operation of the service brake device. The work operators include a forward/reverse operator that instructs the vehicle to move forward, backward, or neutral, and a parking brake operator that instructs the operation of the parking brake device. A transmission capable of disconnecting power transmission between the engine and the driving wheels in response to a neutral position instruction, and determining whether the transmission is in a neutral position state in which power transmission between the engine and the driving wheels is disconnected. A neutral position state determining section, a vehicle speed detecting section that detects the vehicle speed of the vehicle, and the neutral position state determining section determine that the vehicle is in the neutral position state, and the vehicle is moving based on the detection by the vehicle speed detecting section. and a neutral position stop assisting section that executes a process of braking the wheels when it is determined that the wheels are present.

Further, another aspect of the present invention is a construction machinery vehicle that is a vehicle equipped with construction machinery, and in which a region around the driver's seat where a plurality of operation controls for driving the vehicle are arranged, and a region around the driver's seat that is separated from the region around the driver's seat. an automatic stop assist device for a construction machinery vehicle, comprising: a work operation unit disposed at a location where a plurality of work operators for performing work using the construction machine are arranged; The main idea is to apply braking to the wheels if movement of the vehicle is detected when it is assumed that no one is present and the transmission is determined to be in a neutral position where power transmission between the engine and the drive wheels is cut off. shall be.

According to one aspect of the present invention, if movement of the vehicle is detected while the transmission is in the neutral position, which is instructed by the forward/reverse operation operator, braking is automatically applied. This makes it possible to avoid unexpected vehicle behavior due to worker's carelessness.

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

Next, embodiments 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 has a driving operation position when driving on a public road (also referred to as public road forwarding) and a work operation position for a construction machine at a work site. It is applicable to any construction machinery vehicle that can also be operated.

(composition)
As shown in FIG. 1, the road cutting vehicle 1 of this embodiment includes a vehicle body 2, wheels 6 for traveling, and a road cutting device (construction machine). Further, a driver's seat 9 is provided in the upper part of the vehicle body.
A plurality of driving operators for driving the vehicle are provided around the driver's seat 9, that is, around the driver's seat. Further, on the side of the vehicle body 2, an instruction panel 21 and other work operation parts are provided, in which a plurality of work operators for performing work using the construction machine are arranged.

<Road cutting equipment (construction machinery)>
In this embodiment, a road milling device (construction machine) includes a road milling machine 3 that is supported to be movable up and down with respect to a vehicle body 2, an actuator 4 that raises and lowers the road milling machine 3, and a conveyor that extends in the longitudinal direction of the vehicle body. 5.
The conveyor 5 is a conveyor that conveys cutting waste scraped by the road milling machine 3 to the front of the vehicle body 2 in the longitudinal direction, and is supported by the vehicle body 2 . When the road surface is being cut, the transport conveyor 5 is set to extend forward in the longitudinal direction of the vehicle body, as shown in FIG. 1, so that the cutting waste material resulting from cutting can be transported to a truck bed or the like.

The road milling machine 3 is arranged below the vehicle body 2 between the front wheels 6A and the rear wheels 6B. The road milling machine 3 is configured such that a large number of cutter bits are provided on the circumferential surface of a cutter drum whose axis is oriented in the width direction of the vehicle body. The cutter drum is rotatably supported by the machine frame 7 and 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 is composed of a pair of left and right lifting hydraulic cylinders. Each of the lifting hydraulic cylinders is attached to the vehicle body 2 with the cylinder body oriented vertically, and the cylinder rod extends downward from the cylinder body. The tip of the cylinder rod is connected to the machine frame 7. As a result, the machine frame 7, that is, the vertical position of the road milling machine 3 relative to the vehicle body 2 (position relative to the road surface) is adjusted according to the stroke amount of the lifting hydraulic cylinder, and the cutting depth by the road milling machine 3 is adjusted. Ru. The road milling machine 3 is adjusted to either an upper standby position or a lower position in a cutting operation state.

In addition, a third hydraulic cylinder (not shown) is provided which extends obliquely in the vehicle width direction and connects the lower part of the vehicle body and the machine frame 7, and by driving the third hydraulic cylinder, the machine frame 7 can be connected to the road surface. The position of the cutting machine 3 in the vehicle width direction can be shifted left and right. Note that each cylinder body of the lifting hydraulic cylinder is supported by the vehicle body in a state where 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 a parallel link 8 extending in the longitudinal direction of the vehicle body 2. A pair of parallel links 8 are provided on both sides in the vehicle width direction. By providing the parallel link 8, the posture of the machine frame 7 is maintained constant as it moves up and down.

<Vehicle drive/braking system>
The road cutting device 30 such as the road cutting machine 3 described above uses power from the engine 32 as a driving source, and the elevation and rotation of the road cutting machine 3 are controlled by the construction machine control section 31 including a hydraulic circuit. (see Figure 2).
The construction machine control unit 31 can be executed by instructions using operators such as buttons provided on the instruction panel 21 for work. The instruction panel 21 is provided in the work operation unit 40, and the instruction panel 21 is provided with a part of the work operation elements.

As shown in FIG. 2, the running wheels 6 of this embodiment include a front wheel 6A provided on the front side of the vehicle body 2 and a rear wheel 6B provided on the rear side of the vehicle body 2. The front wheels 6A can be steered by operating a steering wheel. The axle of the rear wheel 6B is connected to the engine 32 via a transmission 34, and constitutes a drive wheel that is rotationally driven by the driving force from the engine 32. Further, the power of the engine 32 is used as a hydraulic drive source for driving the road cutting device 30 (construction machine) described above.

Further, the drive wheel 6B is provided with a parking brake device 36 and a service brake device 37 that apply braking force to the drive wheel 6B.
In addition, as shown in FIG. 2, various control units include an engine control unit 33 that controls the drive of the engine 32, a transmission control unit 35 that controls the transmission 34, and a parking brake brake that controls the parking brake device 36. A control section 38 and a service brake braking control section 39 for controlling the service brake device 37 are provided.
The vehicle also includes a plurality of driving operators and a plurality of work operators that instruct the operation of the vehicle.

<Driving controls>
A plurality of driving operators are arranged around the driver's seat area 50. The plurality of driving operators are operators for running the vehicle, and can be operated by a worker seated in the driver's seat 9.
In this embodiment, as shown in FIG. 2, the plurality of 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. .

The engine switch 44 is an operator that supplies instructions to start and stop the engine 32 to the engine control section 33.
The forward/reverse lever 45 on the driving side is an operator that indicates the vehicle running direction, has a forward position, a neutral position, and a reverse position, and is an operator that supplies set running direction information to the transmission control unit 35. It is. Further, instruction information for the forward/backward movement lever 45 on the driving side is 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 section 33 .
The steering wheel is an operator that instructs the steering direction.
The brake lever 48 is a parking brake operator, and its parking brake instruction is supplied to the parking brake braking control section 38.
The foot brake 49 is a service brake operator, and its service brake instruction is supplied to the service brake braking control section 39.

The work main switch 51 is a switch for switching between work mode and forwarding mode.
By turning on the work main switch 51, the instructions from the work operators become valid.
The work main switch 51 is capable of supplying its information to the construction machine control section 31. The work main switch 51 of this embodiment can be switched to the work mode only when the forward/reverse lever 45 on the driving side is in the neutral position.

<Work operator>
The plurality of work operators are operators that give instructions for work operations using the construction machine, and are arranged in the work operation unit 40 that is remote from the driver's seat peripheral area 50. The position of the work operation unit 40 in this embodiment is such that it can be operated by a worker who is located on the road surface after getting off the vehicle.
In this embodiment, the instructions for work operations using the construction machine include instructions to the construction machine (road 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 machines.
The working forward/reverse lever 41 is an operator that instructs the vehicle running direction, has a forward position, a neutral position, and a reverse position, and is an operator that supplies set running direction information to the transmission control unit 35. It is.
The parking brake switch 42 is a parking brake operator, and its parking brake instruction is supplied to the parking brake brake control section 38.
The various operators 43 for construction machines are operators that instruct various operations of the road cutting device 30, and the instruction information is supplied to the construction machine control unit 31. The various operators 43 for construction machines instruct, for example, to raise and lower the road milling machine 3 and to drive it to rotate.

<Control unit>
The engine control section 33 is driven when the engine switch 44 is turned on. The engine control unit 33 executes drive control of the engine 32 based on instructions from the accelerator pedal 46 and the like.
The transmission control unit 35 controls the state of the transmission 34 based on instructions from the forward/reverse lever 45 for driving and the forward/reverse lever 41 for work. In addition, in the case of the work mode (work main switch 51: ON), the instruction of the forward/backward movement lever 41 for work is given priority, and in the case of the forwarding mode (work main switch 51: OFF), the instruction of the forward/backward movement lever 45 for driving is given priority. give priority to instructions.
The parking brake brake control unit 38 controls braking of the parking brake device 36.
The service brake braking control unit 39 controls braking of the service brake device 37.
The construction machine control unit 31 operates when there is an instruction from the work main switch 51 to be in the work mode, and operates the construction machine (road cutting device 30) in response to instructions from various operators 43 for the construction machine. control.

<Automatic stop assist device 60>
Further, this embodiment includes an automatic stop assist device 60.
When the automatic stop assist device 60 estimates that there is no worker in the driver's seat 9 and determines that the transmission 34 is in a neutral position where power transmission between the engine 32 and the drive wheels 6B is cut off, the automatic stop assist device 60 starts the vehicle. When movement of the wheels is detected, a process is executed to apply braking to the wheels. It is preferable that the automatic stop assist device 60 performs a process of applying braking to the wheels 6B, and also notifies a worker of a vehicle movement warning.
Note that, for example, when the work main switch 51 is turned on and the work mode is set, it is assumed that no worker is present in the driver's seat 9. Further, if the driver's seat 9 has a seating sensor, it may be estimated whether or not there is a worker in the driver's seat 9 based on detection by the seating sensor.
As shown in FIG. 3, the automatic stop assist device 60 includes a vehicle speed detection section 61, a neutral position state determination section 62, and a neutral position stop assist section 63.

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

<Neutral position state determination unit 62>
The neutral position state determining unit 62 executes processing for determining whether the transmission 34 is in a neutral position state in which 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 and 45 are both in the neutral position instruction state. The neutral position state determination unit 62 may directly determine whether or not the vehicle 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 may, for example, indicate that the work main switch 51 is on and the work mode is set, and the instruction of the work main switch 51 indicates that the forward/reverse lever 41 in the work operation unit 40 has priority. state, and when the forward/backward movement lever 41 in the work operation unit 40 is in the neutral position instruction state, it is determined that the neutral position state is present.

<Neutral position stop assist section 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 that the vehicle is moving based on the detection by the vehicle speed detection unit 61. do.
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 assisting section 63 of this embodiment includes a service brake braking control processing section 63A, a parking brake braking control processing section 63B, and an engine stopping section 63C.
When the neutral position state determining section 62 determines that the vehicle is in the neutral state and the vehicle is moving based on the detection by the vehicle speed detecting section 61, the service brake braking control processing section 63A executes the service brake braking control processing section 63A. By supplying a braking command to the service brake device 37 via 39, the service brake device 37 is brought into a braking state.

After the service brake device 37 is activated by the operation of the service brake brake control processor 63A, and when it is determined that the vehicle has stopped, the parking brake brake control processor 63B processes the parking brake brake controller 38 via the parking brake brake controller 38. A braking command is supplied to the parking brake device 36 to bring the parking brake device 36 into a braking state.
The engine stop unit 63C does not detect any change in the instruction of any of the above-mentioned operators during a preset period of time after the parking brake brake control processing unit 63B operates and the parking brake device 36 operates. In other words, when it is determined that the vehicle is not being operated, an engine stop command is supplied to the engine control unit 33 that controls the engine 32 of the vehicle, and processing for stopping the engine 32 is executed.
The preset time is, for example, 10 to 20 minutes, although it depends on the target construction equipment vehicle.
Note that the automatic stop assist device 60 may be configured to end the process when a change in any of the operators is detected after activation.

(Other operations)
In the construction equipment vehicle of this embodiment, when movement of the vehicle is detected with the vehicle stopped and the forward/reverse levers 41 and 45 set in the neutral position, the wheel braking device is automatically activated and the vehicle is automatically activated. stop.
In particular, if the worker forgets to operate the brake lever 48 (parking brake) due to his carelessness when getting off the driver's seat 9 and preparing for work, etc., the vehicle stops at a flat place. If so, the vehicle will not move, but if the vehicle is stopped on a slope, the vehicle will start moving and vehicle behavior will occur.
In contrast, in this embodiment, when the transmission 34 is in the neutral position and the automatic stop assist device 60 detects movement of the vehicle, it automatically applies the brakes to prevent unexpected vehicle behavior. It can be prevented.

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 the worker notices this movement of the vehicle and instructs the worker to perform a braking operation or shift the gear forward, the process of the automatic stop assist device 60 ends, but if the worker If the operator does not operate the operator (the vehicle is not operated), it is assumed that the operator has no intention of operating the vehicle, and the engine 32 is stopped.

(effect)
This embodiment has the following effects.
(1) The present embodiment is a construction machinery vehicle that is a vehicle equipped with construction machinery, and a driver's seat peripheral area 50 in which a plurality of driving operators for driving the vehicle are arranged is separated from the driver's seat peripheral area 50. a construction machinery vehicle, comprising: a work operation unit 40 disposed at a location where a plurality of work operators for performing work using the construction machine are arranged; It includes a forward/reverse operator that instructs forward/reverse/neutral travel, 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 performs the above-mentioned work operations. The child includes a forward/reverse operator that instructs the vehicle to move forward, backward, or neutral, and a parking brake operator that instructs the operation of the parking brake device, and further includes a neutral position from the two forward/reverse operators. a transmission 34 capable of cutting off power transmission between the engine 32 and the drive wheels 6B in response to instructions from the above; a parking brake device 36 that brakes the wheels in response to braking instructions from the two parking brake operators; and a service brake. A service brake device 37 that brakes the wheels in response to a braking instruction from an operator, and a neutral position state determination that determines whether or not the transmission 34 is in a neutral position state where power transmission between the engine 32 and the driving wheels 6B is cut off. 62, a vehicle speed detecting section 61 that detects the vehicle speed of the vehicle, and the neutral position state determining section 62 determine that the vehicle is in the neutral position state, and the vehicle is moving based on the detection by the vehicle speed detecting section 61. A neutral position stop assisting section 63 is provided, which executes a process of braking the wheels when it is determined that the vehicle is present.

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

(2) The neutral position state determination unit 62 executes this by determining whether or not the neutral position state is established, for example, by determining whether the two forward/reverse operation operators are both in the neutral position instruction state.
According to this configuration, it can be determined that the transmission 34 is in the neutral position state.

(3) The present embodiment includes a work main switch 51 as the driving operator that enables the operation of the work operator, and the neutral position state determination unit 62 determines whether the state of the work main switch 51 is When the operation of the work operation element is in the instruction state to be valid and the forward/reverse movement operation element in the work operation section 40 is in the neutral position instruction state, the neutral position state is determined.
According to this configuration, in a state in which it is estimated that no worker is present in the driver's seat 9, the transmission 34 is in the neutral position state, and if the vehicle moves, braking is applied to the vehicle. The vehicle can be stopped automatically.
That is, in a situation where it is difficult to immediately notice vehicle behavior due to the worker's carelessness, it is possible to prevent unexpected vehicle behavior.

(4) In the present embodiment, the neutral position stop assist unit 63 determines that the neutral position state determination unit determines that the vehicle is in the neutral position state, and that the vehicle is moving based on the detection of the vehicle speed detection unit 61. Then, a service brake brake control processing section 63A is provided that operates the service brake device 37.
According to this configuration, when the vehicle starts moving, the service brake device can first perform braking to stop the vehicle.

(5) In the present embodiment, after the service brake device 37 is activated by the operation of the service brake braking control processing unit 63A and when it is determined that the vehicle has stopped, the neutral position stop assisting unit 63 A parking brake brake control processing section 63B that operates the parking brake device 36 is provided.
According to this configuration, when the vehicle is stopped by the service brake device, the parking brake device is activated to more reliably maintain the stop of the vehicle.
Note that the parking brake device may be operated without operating the service brake device.

(6) In the present embodiment, the neutral position stop assisting section 63 controls the operation of the driving operator while a preset time elapses after the parking brake braking control processing section 63B operates and the parking brake device operates. and an engine stop unit 63C that supplies an engine stop command to the engine control unit 33 that controls the engine 32 of the vehicle when no change in instruction of any of the work operators is detected.
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 the worker will not be able to immediately perform work using the construction machine.

(7) In this embodiment, the construction machinery vehicle is a vehicle equipped with construction machinery, and the driver's seat peripheral area 50 in which a plurality of driving operators for driving the vehicle are arranged is separated from the driver's seat peripheral area 50. an automatic stop assist device 60 for a construction machinery vehicle, comprising: a work operation section 40 disposed at a location where a plurality of work operators for performing work using the construction machine are disposed; 9, and when the transmission 34 determines that the vehicle is in a neutral position where power transmission between the engine 32 and the drive wheels 6B is cut off, if movement of the vehicle is detected, braking is applied to the wheels. Grant.
According to this configuration, when the worker gets out of the vehicle without applying the parking brake device or the like, the brake is automatically activated when movement of the vehicle is detected, thereby making it possible to avoid unexpected vehicle behavior.

(8) At this time, in this embodiment, the plurality of driving operators include a forward/reverse operator that instructs the vehicle to move forward, backward, or neutral, and a parking brake operator that instructs the operation of the parking brake device; a service brake operator that instructs the operation of the service brake device, and the plurality of work operators mentioned above include a forward/reverse operation operator that instructs the vehicle to move forward, backward, or neutral; and a forward/reverse operation operator that instructs the operation of the parking brake device. and a parking brake operator.
According to this configuration, in a configuration in which the vehicle must be moved during work, when the worker gets off the vehicle without applying the parking brake device, etc., when movement of the vehicle is detected, the brakes are automatically activated, causing an unexpected vehicle behavior can be avoided.

1 Road milling vehicle 2 Vehicle body 3 Road milling machine 5 Conveyor 6A Front wheel 6B Rear wheel (drive wheel)
9 Driver's seat 21 Instruction panel 30 Road cutting equipment (construction machinery)
31 Construction machine control section 32 Engine 33 Engine control section 34 Transmission 35 Transmission control section 36 Parking brake device 37 Service brake device 38 Parking brake brake control section 39 Service brake brake control section 40 Work operation section 41 Front and rear for work Advance lever (forward/reverse operation)
42 Parking brake switch (parking brake operator)
43 Various controls for construction machinery 44 Engine switch 45 Forward/forward lever for driving (forward/forward control)
46 Accelerator pedal 47 Steering wheel 48 Brake lever (parking brake operator)
49 Foot brake (service brake operator)
50 Driver seat area 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 brake control processing unit 63B Parking brake brake control processing unit 63C Engine stop Department

Claims (5)

A construction machinery vehicle is a vehicle equipped with construction machinery;
A region around the driver's seat where a plurality of operation controls for driving the vehicle are arranged, and a plurality of work controls arranged at a location away from the region around the driver's seat for performing work using the construction machine. A construction machinery vehicle comprising: a work operation section;
The plurality of driving operators include a forward/reverse operator that instructs the vehicle to move forward, backward, or neutral, a parking brake operator that instructs the operation of the parking brake device, and a service brake operator that instructs the operation of the service brake device. including a child;
The work operator includes a forward/reverse operator that instructs the vehicle to move forward, backward, or neutral, and a parking brake operator that instructs the operation of a parking brake device;
Furthermore,
a transmission capable of disconnecting power transmission between the engine and the drive wheels in response to a neutral position instruction from the two forward/reverse operation operators;
a neutral position state determination unit that determines whether the transmission is in a neutral position state where 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;
a neutral position stop assist unit that executes a process of braking the wheels when the neutral position state determination unit determines that the vehicle is in the neutral position state and that the vehicle is moving based on the detection by the vehicle speed detection unit;
Equipped with
The neutral position state determination unit determines whether the two forward/reverse operators are in the neutral position state based on whether or not both of them are in the neutral position instruction state.
The construction machinery vehicle described above is characterized by: The driving operator has a work main switch that enables the operation of the work operator,
The neutral position state determining unit is configured to determine that the main work switch is in an instruction state in which the operation of the work operator is enabled, and the forward/reverse operator in the work operation unit is in a neutral position instruction state. The construction machine vehicle according to claim 1 , wherein the construction machine vehicle is determined to be in a neutral position state if the vehicle is in a neutral position. The neutral position stop assist unit provides a service that operates the service brake device when the neutral position state determination unit determines that the vehicle is in the neutral position state and the vehicle is determined to be moving based on the detection by the vehicle speed detection unit. 3. The construction machinery vehicle according to claim 1 , further comprising a brake control processing section for brakes. The neutral position stop assist unit is configured to perform parking brake braking control that operates the parking brake device after the service brake device is activated by the operation of the service brake brake control processing unit and when it is determined that the vehicle has stopped. The construction machinery vehicle according to claim 3 , further comprising a processing section. The neutral position stop assisting section is configured to control any one of the driving operation operator and the work operation operator during a preset period of time after the parking brake brake control processing section operates and the parking brake system is activated. 5. The construction machinery vehicle according to claim 4 , further comprising an engine stop section that supplies an engine stop command to an engine control section that controls the engine of the vehicle when a change in instruction is not detected.

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