WO2022024463A1 - Concrete mixer truck - Google Patents

Concrete mixer truck Download PDF

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Publication number
WO2022024463A1
WO2022024463A1 PCT/JP2021/015194 JP2021015194W WO2022024463A1 WO 2022024463 A1 WO2022024463 A1 WO 2022024463A1 JP 2021015194 W JP2021015194 W JP 2021015194W WO 2022024463 A1 WO2022024463 A1 WO 2022024463A1
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WO
WIPO (PCT)
Prior art keywords
mixer
mixer drum
operation panel
drum
truck
Prior art date
Application number
PCT/JP2021/015194
Other languages
French (fr)
Japanese (ja)
Inventor
幸徳 小森
恵介 木本
茂 川島
Original Assignee
Ｋｙｂ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｋｙｂ株式会社 filed Critical Ｋｙｂ株式会社
Publication of WO2022024463A1 publication Critical patent/WO2022024463A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
    • B60P3/16—Vehicles adapted to transport, to carry or to comprise special loads or objects for carrying mixed concrete, e.g. having rotatable drums

Definitions

  • the present invention relates to a mixer truck.
  • JP2010-228152A discloses a mixer truck equipped with a mixer drum mounted on a gantry and rotatable in the loading direction and the discharging direction, a drive device for rotationally driving the mixer drum, and a controller for controlling the operation of the drive device. Has been done.
  • this mixer truck when the controller determines that the vehicle is running, automatic stirring is performed to rotate the mixer drum in the loading direction in order to maintain the quality of the ready-mixed concrete that is mounted. Further, this mixer truck has an automatic stirring release switch for canceling automatic stirring and a rotation switch for manually controlling the rotation of the mixer drum.
  • the rotary switch is effective so that the ready-mixed concrete can be discharged when the parking brake is in the braking position and the automatic stirring of the mixer drum is stopped while the vehicle is stopped, and the automatic stirring of the mixer drum is performed while the mixer truck is running. In this state, the operation is invalid. Further, the rotary switch is effective when the automatic stirring release switch is turned on and the automatic stirring is stopped so that the ready-mixed concrete can be discharged when necessary even while traveling.
  • the mixer truck is a mixer truck rotatably mounted on the vehicle, an operation panel for manually operating the mixer drum, and a mixer drum control device for controlling the drive of the mixer drum.
  • the mixer drum control device controls so that the mixer drum can be operated by the operation panel when the first unlock operation is performed using the operation panel.
  • the mixer drum is not driven according to the operation even if the operation panel is operated.
  • FIG. 1A is a plan view of the mixer truck according to the embodiment of the present invention as viewed from above.
  • FIG. 1B is a rear view of the mixer truck according to the embodiment of the present invention as viewed from the rear.
  • FIG. 2 is a block diagram showing a hardware configuration of a mixer truck according to an embodiment of the present invention.
  • FIG. 3 is a flowchart showing a processing procedure that enables the controller of the present invention to operate the mixer drum by the operation panel.
  • the mixer truck 1 is a vehicle that transports so-called ready-mixed concrete (hereinafter referred to as "ready-mixed concrete") such as mortar and ready-mixed concrete put into the mixer drum 2.
  • ready-mixed concrete so-called ready-mixed concrete
  • the mixer truck 1 is a vehicle provided with a driver's cab 11 and a gantry 3.
  • the mixer truck 1 includes a mixer drum 2 rotatably mounted on the vehicle, an operation panel 40 for manually operating the mixer drum 2, and a controller 20 as a mixer drum control device for controlling the drive of the mixer drum 2. ..
  • the mixer drum 2 is a bottomed cylindrical container rotatably mounted on the gantry 3, and an opening 2a for loading and unloading ready-mixed concrete is provided at the rear end thereof.
  • the mixer drum 2 is mounted so as to be inclined so that its rotation axis O gradually rises from the front portion to the rear portion of the vehicle.
  • Drum blades (not shown) are spirally arranged in the mixer drum 2 along the inner wall surface of the drum, and the drum blades rotate together with the mixer drum 2 to stir the ready-mixed concrete loaded in the mixer drum 2. Will be.
  • a hopper 16 is provided at the upper rear portion of the opening 2a of the mixer drum 2.
  • the ready-mixed concrete put into the mixer truck 1 at the ready-mixed concrete factory is guided to the opening 2a by the hopper 16.
  • a flow guide 17 and a chute 18 are provided at the lower rear portion of the opening 2a of the mixer drum 2.
  • the ready-mixed concrete discharged from the opening 2a is guided to the chute 18 by the flow guide 17, and is discharged in a predetermined direction by the chute 18.
  • the mixer drum 2 is rotationally driven via a drive device 4 using a traveling engine 10 mounted on the mixer truck 1 as a drive source.
  • the drive device 4 is a fluid pressure device that is driven by the rotation of the engine 10 and rotationally drives the mixer drum 2 by the fluid pressure of the working fluid.
  • the engine 10 has a throttle valve 10a for adjusting the output and the rotation speed of the engine 10.
  • the opening degree of the throttle valve 10a is controlled by the controller 20 via an actuator (not shown) when the drive device 4 is driven by the engine 10.
  • the engine 10 is provided with a rotation sensor 10b that detects the rotation speed of the engine 10 and outputs a signal corresponding to the detected rotation speed to the controller 20.
  • the rotation speed of the engine 10 when driving the drive device 4 is controlled by the controller 20 via the throttle valve 10a so that the rotation speed detected by the rotation sensor 10b becomes a predetermined magnitude.
  • the rotation sensor 10b may detect the rotation speed of the PTO shaft 9 or the drive shaft 8 described later, which is the input shaft of the drive device 4, or may detect the rotation speed of the hydraulic pump 5 described later. May be.
  • PTO Power take-off
  • drive shaft 8 that connects the PTO shaft 9 and the drive device 4. Will be done.
  • the drive device 4 includes a hydraulic pump 5 driven by an engine 10 to discharge hydraulic oil as a hydraulic fluid, and a hydraulic motor 6 operated by hydraulic oil supplied from the hydraulic pump 5 to rotationally drive the mixer drum 2.
  • a hydraulic pump 5 driven by an engine 10 to discharge hydraulic oil as a hydraulic fluid
  • a hydraulic motor 6 operated by hydraulic oil supplied from the hydraulic pump 5 to rotationally drive the mixer drum 2.
  • another incompressible fluid may be used as the hydraulic fluid.
  • the hydraulic pump 5 is a swash plate type axial piston pump whose discharge amount is changed according to the tilt angle of the swash plate (not shown).
  • the hydraulic pump 5 includes a control valve 5a that controls the flow of hydraulic oil from the hydraulic pump 5 to the hydraulic motor 6, and a tilt angle adjustment that adjusts the discharge amount of the hydraulic pump 5 by changing the tilt angle of the swash plate. It has a mechanism 5b and a pressure sensor 5c that detects the pressure of hydraulic oil supplied to the hydraulic motor 6.
  • the hydraulic pump 5 is rotationally driven by the power constantly taken out from the engine 10 via the PTO shaft 9.
  • the drive source for rotationally driving the hydraulic pump 5 is not limited to the traveling engine 10, and may be an auxiliary engine or an electric motor that is not used for traveling.
  • the hydraulic oil discharged from the hydraulic pump 5 is supplied to the hydraulic motor 6, and the hydraulic motor 6 rotates.
  • the rotation of the hydraulic motor 6 is transmitted to the mixer drum 2 via the speed reducer 7.
  • the pump discharge pressure guided to the actuator is adjusted by a load sensing valve (not shown).
  • the load sensing valve adjusts the pump discharge pressure guided to the actuator so that the differential pressure between the discharge pressure of the hydraulic pump 5 and the pressure (load pressure) supplied to the hydraulic motor 6 becomes a predetermined value.
  • the hydraulic pump 5 is not limited to the above type of pump, and may be any type of pump as long as it has a variable discharge capacity.
  • the hydraulic motor 6 is a swash plate type axial piston motor with a variable capacity.
  • the hydraulic motor 6 is rotationally driven by receiving the supply of hydraulic oil discharged from the hydraulic pump 5.
  • the hydraulic motor 6 includes a solenoid valve (not shown) that receives a second speed switching signal from the controller 20 and adjusts the tilt angle of the swash plate (not shown).
  • the capacity of the hydraulic motor 6 is switched between a small capacity for high-speed rotation (2nd speed) and a large capacity for normal rotation (1st speed) by switching the solenoid valve.
  • the hydraulic motor 6 may have a capacity that can be switched steplessly.
  • the hydraulic motor 6 is provided with a rotation sensor 6a as a rotation speed detector.
  • the rotation sensor 6a detects the rotation direction of the output shaft (not shown) and the rotation speed of the output shaft, and outputs a rotation direction signal and a rotation number signal to the controller 20.
  • a closed circuit L is provided between the hydraulic pump 5 and the hydraulic motor 6, and hydraulic oil circulates in the closed circuit L.
  • An electromagnetic proportional valve 31 is provided in the closed circuit L.
  • the electromagnetic proportional valve 31 has a normal rotation position 31A that guides the hydraulic oil discharged by the hydraulic pump 5 to the hydraulic motor 6 so as to rotate the mixer drum 2 in the forward direction, and causes the hydraulic oil discharged by the hydraulic pump 5 to rotate in the reverse direction.
  • a reverse position 31B leading to the hydraulic motor 6 and a neutral position 31C for blocking the flow of hydraulic oil from the hydraulic pump 5 to the hydraulic motor 6 are provided.
  • the electromagnetic proportional valve 31 has a pair of solenoids 32a and 32b and a pair of return springs 33a and 33b.
  • the pair of solenoids 32a and 32b are operated by a control signal output from the controller 20.
  • the control signal is a current value.
  • the position of the electromagnetic proportional valve 31 is steplessly switched by the forward rotation position 31A, the neutral position 31C, and the reverse rotation position 31B.
  • the electromagnetic proportional valve 31 is switched to the normal rotation position 31A at an opening degree according to the amount of energization.
  • the hydraulic motor 6 is supplied with hydraulic oil having a flow rate corresponding to the opening degree of the electromagnetic proportional valve 31 so as to rotate the mixer drum 2 in the forward rotation direction.
  • the electromagnetic proportional valve 31 is switched to the reversing position 31B at an opening degree according to the amount of energization by energizing the other solenoid 32b.
  • the hydraulic motor 6 is supplied with hydraulic oil having a flow rate corresponding to the opening degree of the electromagnetic proportional valve 31 so as to rotate the mixer drum 2 in the reverse direction.
  • the opening degree of the electromagnetic proportional valve 31 increases as the amount of energization to the solenoids 32a and 32b increases, and a large flow rate is guided to the hydraulic motor 6.
  • the electromagnetic proportional valve 31 is switched to the neutral position 31C by the urging force of the pair of return springs 33a and 33b.
  • the neutral position 31C the supply of hydraulic oil to the hydraulic motor 6 is cut off, so that the hydraulic motor 6 is not rotationally driven.
  • the hydraulic motor 6 is supplied by supplying the hydraulic oil discharged from the hydraulic pump 5 to the hydraulic motor 6, and the flow of the hydraulic oil supplied, the amount of oil, and the inclination of the hydraulic motor 6 are inclined.
  • the rotation speed of the hydraulic motor 6 is changed according to the tilt angle of the plate. Further, the rotation direction of the hydraulic motor 6 is switched by switching the position of the control valve 5a of the hydraulic pump 5.
  • the output shaft of the drive device 4, that is, the output shaft of the hydraulic motor 6, is connected to the rotary shaft O of the mixer drum 2 via the speed reducer 7. Therefore, it is possible to increase or decrease the rotation speed of the mixer drum 2 by increasing or decreasing the rotation speed of the hydraulic motor 6. Further, by switching the rotation direction of the hydraulic motor 6, it is possible to switch the rotation direction of the mixer drum 2 between the charging direction which is the forward rotation direction and the discharge direction which is the reverse rotation direction.
  • the rotation speed and the rotation direction of the mixer drum 2 correlate with the rotation speed and the rotation direction of the hydraulic motor 6, the rotation speed and the rotation direction of the mixer drum 2 can be grasped from the detection value of the rotation sensor 6a of the hydraulic motor 6. It is possible to do.
  • the rotation sensor 6a may detect the rotation speed and the rotation direction of the mixer drum 2 instead of the hydraulic motor 6.
  • the ready-mixed concrete in the mixer drum 2 moves forward while being agitated by the drum blade.
  • the ready-mixed concrete in the mixer drum 2 moves backward while being agitated by the drum blade.
  • the ready-mixed concrete can be discharged from the opening 2a of the mixer drum 2.
  • the ready-mixed concrete discharged from the mixer drum 2 is guided to a predetermined position via the flow guide 17 and the chute 18.
  • the mixed ready-mixed concrete is rotated in the charging direction at a higher speed than during stirring, so that the charged ready-mixed concrete is quickly moved to the front of the mixer drum 2. Move it.
  • the controller 20 is composed of a microcomputer equipped with a CPU (central processing unit), ROM (read-only memory), RAM (random access memory), I / O interface (input / output interface), and the like.
  • the RAM stores data in the processing of the CPU
  • the ROM stores the control program of the CPU in advance
  • the I / O interface is used for input / output of information with the connected device.
  • the operation of the drive device 4 is controlled by operating the CPU, RAM, or the like according to a program stored in the ROM.
  • the rotation sensor 6a of the hydraulic motor 6, the rotation sensor 10b of the engine 10, and the pressure sensor 5c of the hydraulic pump 5 are connected to the controller 20, and the vehicle speed sensor that detects the vehicle speed of the vehicle is detected. 21 is connected, and the detection value detected by these sensors is input.
  • a parking brake switch 22 for detecting the operating state of the parking brake 12 is connected to the controller 20, and a parking signal indicating the operation or non-operation of the parking brake 12 is input.
  • the electromagnetic proportional valve 31 and the throttle valve 10a are connected to the controller 20, and a command value for operating them is output from the controller 20.
  • an operation panel 40 for manually operating the rotation direction and rotation speed of the mixer drum 2 is connected to the controller 20.
  • the operation panel 40 includes a first operation panel 41 provided in the driver's cab 11, a second operation panel 42 provided on the right rear side of the mixer truck 1, and a third operation panel 43 provided on the left rear side of the mixer truck 1. It has a fourth operation panel 44 provided near the hopper 16.
  • the first operation panel 41 is provided in the driver's cab 11 so that the mixer drum 2 can be operated even while the vehicle is running.
  • the first operation panel 41 includes a dial knob type potentiometer 41a for changing the rotation direction and rotation speed of the mixer drum 2, an emergency stop switch 41b for stopping the rotation of the mixer drum 2 in an emergency, and an automatic mixer drum 2.
  • An automatic stirring release switch 41c for canceling stirring is provided.
  • the controller 20 can rotate the mixer drum 2 in response to the rotation operation of the potentiometer 41a. Therefore, for example, it is possible to discharge the ready-mixed concrete in the mixer drum 2 while the vehicle is running at an extremely low speed.
  • the second operation panel 42 is provided on the right rear side of the mixer truck 1 in order to enable the operation of the mixer drum 2 while observing the amount of ready-mixed concrete discharged to the right side of the vehicle via the chute 18.
  • the second operation panel 42 is provided with a dial knob type potentiometer 42a for changing the rotation direction and rotation speed of the mixer drum 2, and an emergency stop switch 42b for stopping the rotation of the mixer drum 2 in an emergency.
  • the third operation panel 43 is provided on the left rear side of the mixer truck 1 in order to enable the operation of the mixer drum 2 while observing the amount of ready-mixed concrete discharged to the left side of the vehicle via the chute 18. For example, when discharging ready-mixed concrete in a state where two mixer trucks 1 are arranged side by side, a second operation panel 42 provided on the right rear side of one vehicle is operated while a second operation panel 42 provided on the left rear side of the other vehicle is operated. 3 The operation panel 43 can be operated. This makes it possible to supply ready-mixed concrete without interruption or to supply a large amount of ready-mixed concrete.
  • the third operation panel 43 includes a dial knob type potentiometer 43a for changing the rotation direction and rotation speed of the mixer drum 2, and an emergency for stopping the rotation of the mixer drum 2 in an emergency.
  • a stop switch 43b and the like are provided.
  • the fourth operation panel 44 is provided around the hopper 16, that is, above the vehicle, so that the mixer drum 2 can be operated while checking the remaining amount of ready-mixed concrete in the mixer drum 2. Similar to the second operation panel 42 and the third operation panel 43, the fourth operation panel 44 includes a dial knob type potentiometer 44a for changing the rotation direction and rotation speed of the mixer drum 2, and the rotation of the mixer drum 2 in an emergency. An emergency stop switch 44b for stopping the engine is provided.
  • Each of the operation panels 41 to 44 of the operation panel 40 may be a stationary type fixed to the vehicle, or may be a removable type that is connected to the vehicle via a cable and can be removed.
  • the potentiometers 41a to 44a provided on the operation panels 41 to 44 are variable resistors whose electric resistance value changes according to the amount of rotation operation.
  • the controller 20 determines that the rotational state of the mixer drum 2 is in a state corresponding to the electric resistance value of the potentiometers 41a to 44a in the swash plate of the hydraulic pump 5. It controls each mechanism constituting the drive device 4, such as the tilt angle, the tilt angle of the swash plate of the hydraulic motor 6, and the control valve 5a of the hydraulic pump 5.
  • the potential meters 41a to 44a are located between the loading position where the mixer drum 2 is rotated in the loading direction, the discharging position where the mixer drum 2 is rotated in the discharging direction, and the loading position and the discharging position, and the rotation of the mixer drum 2 is performed. It has a neutral position for stopping the engine, a maximum charging position where the rotational speed of the mixer drum 2 is maximum in the charging position, and a maximum discharging position where the rotational speed of the mixer drum 2 is maximum in the discharging position.
  • the potentiometer 41a when the potentiometer 41a is rotated clockwise from the neutral position on the first operation panel 41, the potentiometer 41a is in the closing position and the controller 20 is rotated according to the electric resistance value of the potentiometer 41a.
  • the mixer drum 2 is rotated in the loading direction at a speed.
  • the potentiometer 41a When the potentiometer 41a is rotated to the maximum in the clockwise direction, the potentiometer 41a reaches the maximum closing position, and the rotation speed of the mixer drum 2 becomes the maximum in the closing position.
  • the potentiometer 41a when the potentiometer 41a is rotated counterclockwise from the neutral position by the operator, the potentiometer 41a is in the discharge position, and the controller 20 moves the mixer drum 2 at a rotation speed corresponding to the electric resistance value of the potentiometer 41a. Is rotated in the discharge direction.
  • the potentiometer 41a When the potentiometer 41a is rotated to the maximum in the counterclockwise direction, the potentiometer 41a reaches the maximum discharge position, and the rotation speed of the mixer drum 2 becomes the maximum in the discharge position.
  • potentiometers 41a to 44a may be of a linear type that is operated by sliding instead of a dial knob type that is operated by rotation.
  • the first operation panel 41, the second operation panel 42, the third operation panel 43, and the fourth operation panel 44 are mixers as described later. Operation rights are granted according to the traveling state of the vehicle 1 and the on / off state of the automatic stirring release switch 41c.
  • the controller 20 determines whether or not the mixer truck 1 is running based on the signal from the parking brake switch 22 and the detection value of the vehicle speed sensor 21. Specifically, the controller 20 determines that the mixer truck 1 is in a running state when the signal from the parking brake switch 22 indicates that the parking brake 12 is not operating and the vehicle speed is higher than 0. do. The state where the vehicle speed is higher than 0 is the state where the mixer truck 1 is moving.
  • the controller 20 automatically agitates the mixer drum 2 regardless of the operation of the operation panel 40 when the mixer truck 1 is running.
  • the automatic stirring of the mixer drum 2 is to automatically rotate the mixer drum 2 in the loading direction to stir the load. Specifically, when the controller 20 determines that the mixer truck 1 is running, the controller 20 rotates the mixer drum 2 in the loading direction in order to prevent the discharge of the ready-mixed concrete and maintain the quality of the ready-mixed concrete in the mixer drum 2. Automatic stirring of the mixer drum 2 for stirring the ready-mixed concrete is performed.
  • the ready-mixed concrete in the mixer drum 2 can be discharged by the controller 20.
  • the operation panel 40 is given the operation right of the mixer drum 2.
  • the mixer drum 2 is automatically stirred when the automatic stirring release switch 41c of the first operation panel 41 is turned on so that the ready-mixed concrete can be discharged when necessary even while the mixer truck 1 is running. Even in this state, the operation panel 40 is given the operation right of the mixer drum 2.
  • FIG. 3 is a flowchart showing a processing procedure that enables the controller 20 to operate the mixer drum 2 by the operation panel 40.
  • the controller 20 repeatedly executes the process shown in FIG. 3 at predetermined time intervals when the ignition switch ON signal is received, that is, when the engine of the own vehicle is started.
  • step S101 the controller 20 determines whether or not the mixer truck 1 is in a traveling state. Specifically, as described above, when the signal from the parking brake switch 22 indicates that the parking brake 12 is not operating and the vehicle speed is higher than 0, it is determined that the mixer truck 1 is in the traveling state. If the mixer truck 1 is not in the traveling state, the process proceeds to step S102, the operation panel 40 is given the operation right of the mixer drum 2, and the mixer drum 2 can be operated by the operation panel 40, and the process is terminated. That is, the mixer truck 1 is not in the running state, in other words, in the stopped state, the mixer drum 2 can be operated by the operation panel 40, and the ready-mixed concrete can be discharged by the operation panel 40. If the mixer truck 1 is in the traveling state, the process proceeds to step S103.
  • step S103 it is determined whether or not the automatic stirring release switch 41c is on. If the automatic stirring release switch 41c is off, the process proceeds to step S104, the operation panel 40 is not given the operation right of the mixer drum 2, the operation panel 40 cannot operate the mixer drum 2, and the process ends. That is, in the state where the mixer truck 1 is in a running state and the mixer drum 2 is automatically agitated, the mixer drum 2 cannot be operated by the operation panel 40, and the ready-mixed concrete cannot be discharged. If the automatic stirring release switch 41c is on, the process proceeds to step S105, and the operation panel 40 is given the operation right of the mixer drum 2. Here, unlike step S102, only the operation right of the mixer drum 2 is given to the operation panel 40, and in this state, the operation panel 40 cannot operate the mixer drum 2.
  • the mixer drum may be erroneously operated.
  • the load may be unintentionally ejected while the mixer truck is running.
  • the controller 20 of the mixer truck 1 gives the operation panel 40 the operation right of the mixer drum 2 according to the traveling state of the mixer truck 1.
  • the controller 20 grants the operation panel 40 the right to operate the mixer drum 2 while the mixer truck 1 is running.
  • a signal corresponding to the unlock operation is input to the controller 20.
  • the controller 20 controls so that the mixer drum 2 can be operated by the operation panel 40.
  • the controller 20 Does not drive the mixer drum 2 in response to the operation of the operation panel 40 even if the operation panel 40 is operated.
  • step S106 it is determined whether or not the lock release operation has been performed using the operation panel 40 within a predetermined time after the automatic stirring release switch 41c is turned on.
  • the unlock operation is to prevent erroneous operation of the mixer drum 2 by the operation panel 40.
  • the process proceeds to step S107, and even if the operation panel 40 is given the operation right of the mixer drum 2, the operation panel 40 cannot operate the mixer drum 2, and the process ends.
  • step S106 determines whether the unlock operation is performed. If the unlock operation is performed, the determination in step S106 becomes "YES" and the process proceeds to step S108. Then, the automatic stirring of the mixer drum 2 is canceled, the mixer drum 2 can be operated by the operation panel 40, and the process is completed.
  • the controller 20 does not accept the operation of the mixer drum 2 by the operation panel 40 until the lock release operation is performed. Therefore, even if the operation panel 40 is accidentally touched, the mixer drum 2 will not be operated. This prevents erroneous operation of the mixer drum 2 while the mixer truck 1 is running.
  • the automatic stirring release operation of the controller 20 when the lock release operation of the controller 20 is performed within a predetermined time after the automatic stirring release switch 41c for canceling the automatic stirring is turned on, the automatic stirring is released and the mixer drum 2 is operated by the operation panel 40. Is controlled so that That is, if the time from when the automatic stirring release switch 41c is turned on to when the lock release operation is performed is within a predetermined time, the controller 20 enables the mixer drum 2 to be operated by the operation panel 40.
  • a predetermined time has elapsed after the automatic stirring release switch 41c is turned on, the automatic stirring of the mixer drum 2 is not released even if the lock release operation is performed, the operation of the mixer drum 2 by the operation panel 40 becomes impossible, and the mixer drum 2 is intended. It will not be operated without it.
  • the controller 20 releases the automatic stirring of the mixer drum 2 even when a predetermined time or more has elapsed from the time when the automatic stirring release switch 41c is turned on until the lock release operation is performed, and the operation panel 40 cancels the automatic stirring. It may be controlled so that the mixer drum 2 can be operated by the above.
  • the operation panel 40 has potentiometers 41a, 42a, 43a, 44a as dials for controlling the rotation of the mixer drum 2.
  • the controller 20 determines that the unlock operation has been performed when the potentiometers 41a, 42a, 43a, 44a reciprocate in a predetermined section between the neutral position and the maximum input position, and determines that the unlock operation has been performed, and the mixer drum 2 by the operation panel 40 Control so that the operation of is possible.
  • the controller 20 has a position where any one of the potentiometers 41a, 42a, 43a, 44a is 10% when the rotation speed of the mixer drum 2 at the loading position is 100% when the maximum loading position is 100%, and the mixer drum 2 at the loading position.
  • the unlock operation When the operation of reciprocating between the position where the rotation speed of is 95% when the maximum input position is set to 100% and the position is performed, it is determined that the unlock operation has been performed.
  • the ready-mixed concrete is not charged into the mixer drum 2, so that the potentiometers 41a, 42a, 43a, 44a are not adjusted to the charging positions. Therefore, the unlocking operation is not performed unintentionally because it includes an operation that is not normally performed while the mixer truck 1 is running, in which the potentiometers 41a, 42a, 43a, 44a are adjusted to the insertion positions.
  • the potentiometers 41a, 42a, 43a, 44a are adjusted to the insertion positions.
  • the unlocking operation does not align the potentiometers 41a, 42a, 43a, 44a with the ejection positions, it is possible to prevent the mixer drum 2 from being rotated in the ejection direction after the unlocking operation and ejecting the ready-mixed concrete.
  • the unlocking operation is not limited to the one described above.
  • the operation panel 40 is given the operation right of the mixer drum 2 in step S108.
  • the mixer drum 2 may be operated by the operation panel 40.
  • step S102 and step S105 the operation right of the mixer drum 2 is given to only one of the operation panels 40, for example, only the first operation panel 41 provided in the driver's cab 11, and the mixer drum 2 is locked by the operation panel in step S106.
  • the mixer drum 2 may be operated by the operation panel in step S108.
  • step S101 the process may proceed to step S105 instead of step S102. That is, even if the vehicle is stopped, when the unlock operation is performed with the operation panel 40 given the operation right of the mixer drum 2, as in the case of the traveling state (steps S105, S106, S108), the operation panel is operated. It may be controlled so that the mixer drum 2 can be operated by 40.
  • the controller 20 controls the mixer truck 1 so that the mixer truck 1 can be operated by the operation panel 40 by performing the unlocking operation using the operation panel 40 when the mixer truck 1 is stopped.
  • the unlocking operation when the mixer truck 1 is stopped may be the same as the unlocking operation when the mixer truck 1 is stopped.
  • the unlocking operation performed when the mixer truck 1 is in the traveling state corresponds to the first unlocking operation
  • the unlocking operation performed when the mixer truck 1 is in the stopped state corresponds to the second unlocking operation.
  • the mixer truck 1 is loaded and unloaded with loads in a stopped state.
  • the load may be discharged while the vehicle is running. Discharging the load while driving is not a normal task, so it is rarely done. That is, the second unlock operation performed for loading and unloading the load in the stopped state is performed more frequently than the first unlock operation performed for discharging the load in the running state. ..
  • the second unlock operation is applied to the first unlock operation that is performed less frequently than the second unlock operation.
  • the mixer drum 2 can be easily operated by the operation panel 40.
  • the unlocking operation when the mixer truck 1 is stopped and the unlocking operation when the mixer truck 1 is running may be different.
  • step S101 the controller 20 indicates a state in which the signal from the parking brake switch 22 indicates the operation of the parking brake 12 and the vehicle speed is greater than 0, which cannot normally occur, in other words, the state indicated by the vehicle speed (mixer).
  • a state where there is a discrepancy between the state in which the vehicle 1 is running) and the state indicated by the signal from the parking brake switch 22 (the mixer vehicle 1 is stopped) an abnormality in the signal from the parking brake switch 22 is detected.
  • the mixer truck 1 is in the traveling state based on the information that the vehicle speed is greater than 0. Therefore, even if an abnormality occurs in the signal from the parking brake switch 22, the mixer drum 2 can be operated by operating the operation panel 40 by performing the unlock operation using the operation panel 40 while the mixer truck 1 is running. Can be driven accordingly.
  • the controller 20 determines the traveling state of the mixer truck 1 from the parking signal input by the parking brake switch 22 and the vehicle speed input by the vehicle speed sensor 21.
  • the vehicle speed is not limited to that input by the vehicle speed sensor 21, and may be calculated based on GPS position information, an acceleration sensor, an image taken by a drive recorder, or the like, and input to the controller 20. Further, the controller 20 may determine the traveling state of the mixer truck 1 only from the parking signal without using the vehicle speed.
  • the operation panel 40 has operation panels 41 to 44.
  • the number of operation panels included in the operation panel 40 is not limited to this, and the operation panel 40 may have only one or four or more.
  • the mixer truck 1 includes a mixer drum 2 rotatably mounted on the vehicle, an operation panel 40 for manually operating the mixer drum 2, and a controller 20 for controlling the drive of the mixer drum 2.
  • the controller 20 includes a controller 20.
  • the controller 20 does not accept the operation of the mixer drum 2 by the operation panel 40 until the first lock release operation is performed while the mixer truck 1 is running. Therefore, even if the mixer truck 1 accidentally touches the operation panel 40, the mixer drum 2 is not accepted. Is never manipulated.
  • the controller 20 automatically rotates the mixer drum 2 in the loading direction when the mixer wheel 1 is running to perform automatic stirring to stir the loaded object, and when the mixer wheel 1 is in a running state, the operation panel 40 has the right to operate the mixer drum 2. If the period from when the automatic stirring release switch 41c for releasing the automatic stirring to the first lock release operation is within a predetermined time is within a predetermined time, the mixer drum 2 is operated by the operation panel 40. Control to be possible.
  • the operation panel 40 has potentiometers 41a, 42a, 43a, 44a that control the rotation of the mixer drum 2, and the potentiometers 41a, 42a, 43a, 44a have a charging position at which the mixer drum 2 rotates in the charging direction and a discharger from the mixer drum 2.
  • a discharge position that rotates in the direction a neutral position that is located between the loading position and the discharging position and where the rotation of the mixer drum 2 stops, and a maximum loading position that maximizes the rotation speed of the mixer drum 2 in the loading position.
  • the controller 20 determines that the first unlock operation has been performed when the potentiometers 41a, 42a, 43a, 44a reciprocate in a predetermined section between the neutral position and the maximum input position.
  • the first unlock operation is unintentionally performed because it includes an operation of rotating the potentiometers 41a, 42a, 43a, 44a toward the loading position, which is not normally performed while the mixer truck is running. None.
  • the controller 20 controls so that the mixer drum 2 can be operated by the operation panel 40 by performing the second unlock operation using the operation panel 40, and the first unlock is released.
  • the operation and the second unlock operation are the same.
  • the first unlock operation when the mixer truck 1 is in the running state and the second unlock operation when the mixer truck 1 is in the stopped state are the same.
  • the second unlock operation performed for loading and unloading the load in the stopped state is performed more frequently than the first unlock operation performed for ejecting the load in the running state.
  • the second unlock operation is applied to the first unlock operation that is performed less frequently than the second unlock operation. This prevents erroneous operation of the mixer drum 2 and facilitates operation of the mixer drum 2 by the operation panel 40.

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  • Mechanical Engineering (AREA)
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Abstract

A concrete mixer truck 1 is provided with: a mixer drum 2 that is rotatably mounted on a vehicle; an operating panel 4 that is used to manually operate the mixer drum 2; and a controller 20 that controls driving of the mixer drum 2. When the concrete mixer truck 1 is in a traveling state, the controller 20 performs control to enable an operation of the mixer drum 2 when a first unlocking operation is performed using the operation panel 40 and does perform, even if the operation panel 40 is operated before the first unlocking operation is performed using the operation panel 40, the driving of the mixer drum 2 according to the operation.

Description

ミキサ車Mixer truck
　本発明は、ミキサ車に関する。 The present invention relates to a mixer truck.
　ＪＰ２０１０－２２８１５２Ａには、架台に搭載され、投入方向及び排出方向に回転可能なミキサドラムと、ミキサドラムを回転駆動するための駆動装置と、駆動装置の動作を制御するコントローラと、を備えるミキサ車が開示されている。このミキサ車では、コントローラによって車両が走行中であると判定されると、搭載物である生コンの品質を保つため、ミキサドラムを投入方向に回転させる自動撹拌が行われる。また、このミキサ車は、自動撹拌を解除する自動撹拌解除スイッチと、ミキサドラムの回転を手動制御するための回転スイッチと、を有する。 JP2010-228152A discloses a mixer truck equipped with a mixer drum mounted on a gantry and rotatable in the loading direction and the discharging direction, a drive device for rotationally driving the mixer drum, and a controller for controlling the operation of the drive device. Has been done. In this mixer truck, when the controller determines that the vehicle is running, automatic stirring is performed to rotate the mixer drum in the loading direction in order to maintain the quality of the ready-mixed concrete that is mounted. Further, this mixer truck has an automatic stirring release switch for canceling automatic stirring and a rotation switch for manually controlling the rotation of the mixer drum.
　回転スイッチは、パーキングブレーキが制動位置にあり停車中でミキサドラムの自動撹拌が停止した状態では、生コンを排出可能なように操作が有効とされ、ミキサ車の走行中でミキサドラムの自動撹拌が行われている状態では、操作が無効とされる。また、回転スイッチは、走行中であっても必要な際は生コンを排出できるように、自動撹拌解除スイッチがオンにされて自動撹拌が停止した状態では、操作が有効とされる。 The rotary switch is effective so that the ready-mixed concrete can be discharged when the parking brake is in the braking position and the automatic stirring of the mixer drum is stopped while the vehicle is stopped, and the automatic stirring of the mixer drum is performed while the mixer truck is running. In this state, the operation is invalid. Further, the rotary switch is effective when the automatic stirring release switch is turned on and the automatic stirring is stopped so that the ready-mixed concrete can be discharged when necessary even while traveling.
　ＪＰ２０１０－２２８１５２Ａに記載のミキサ車では、回転スイッチによる操作が有効な状態で誤って回転スイッチに人や物が接触し、ミキサドラムが誤操作されるおそれがある。特に、ミキサ車の走行中にミキサドラムが誤操作されると、走行中に搭載物が意図せずに排出されるおそれがある。 In the mixer truck described in JP2010-228152A, there is a risk that a person or an object may accidentally come into contact with the rotary switch while the operation by the rotary switch is enabled, and the mixer drum may be erroneously operated. In particular, if the mixer drum is erroneously operated while the mixer truck is running, the load may be unintentionally ejected while the mixer truck is running.
　本発明は、ミキサ車の走行中のミキサドラムの誤操作を防止することを目的とする。 It is an object of the present invention to prevent erroneous operation of the mixer drum while the mixer truck is running.
　本発明のある態様によれば、ミキサ車であって、車両上に回転自在に搭載されたミキサドラムと、前記ミキサドラムを手動で操作するための操作盤と、前記ミキサドラムの駆動を制御するミキサドラム制御装置と、を備え、前記ミキサドラム制御装置は、前記ミキサ車が走行状態では、前記操作盤を用いて第一ロック解除操作がされると前記操作盤による前記ミキサドラムの操作が可能となるように制御し、前記操作盤を用いて前記第一ロック解除操作がされる前では前記操作盤が操作されても当該操作に応じた前記ミキサドラムの駆動を行わない。 According to an aspect of the present invention, the mixer truck is a mixer truck rotatably mounted on the vehicle, an operation panel for manually operating the mixer drum, and a mixer drum control device for controlling the drive of the mixer drum. When the mixer truck is in a running state, the mixer drum control device controls so that the mixer drum can be operated by the operation panel when the first unlock operation is performed using the operation panel. Before the first lock release operation is performed using the operation panel, the mixer drum is not driven according to the operation even if the operation panel is operated.
図１Ａは本発明の実施形態に係るミキサ車を上方から見た平面図である。FIG. 1A is a plan view of the mixer truck according to the embodiment of the present invention as viewed from above. 図１Ｂは本発明の実施形態に係るミキサ車を後方から見た背面図である。FIG. 1B is a rear view of the mixer truck according to the embodiment of the present invention as viewed from the rear. 図２は本発明の実施形態に係るミキサ車のハードウェア構成を示すブロック図である。FIG. 2 is a block diagram showing a hardware configuration of a mixer truck according to an embodiment of the present invention. 図３は本発明のコントローラが操作盤によるミキサドラムの操作を可能とする処理手順を示すフローチャートである。FIG. 3 is a flowchart showing a processing procedure that enables the controller of the present invention to operate the mixer drum by the operation panel.
　以下、図面を参照して、本発明の実施形態に係るミキサ車について説明する。 Hereinafter, the mixer truck according to the embodiment of the present invention will be described with reference to the drawings.
　ミキサ車１は、ミキサドラム２内に投入されたモルタルやレディミクストコンクリート等のいわゆる生コンクリート（以下、「生コン」と称する。）を運搬する車両である。以下の説明では、ミキサ車１が積載物として生コンを積載する場合について説明する。 The mixer truck 1 is a vehicle that transports so-called ready-mixed concrete (hereinafter referred to as "ready-mixed concrete") such as mortar and ready-mixed concrete put into the mixer drum 2. In the following description, a case where the mixer truck 1 loads ready-mixed concrete as a load will be described.
　図１Ａ，Ｂに示すように、ミキサ車１は、運転室１１と架台３とを備える車両である。ミキサ車１は、車両上に回転自在に搭載されたミキサドラム２と、ミキサドラム２を手動で操作するための操作盤４０と、ミキサドラム２の駆動を制御するミキサドラム制御装置としてのコントローラ２０と、を備える。 As shown in FIGS. 1A and 1B, the mixer truck 1 is a vehicle provided with a driver's cab 11 and a gantry 3. The mixer truck 1 includes a mixer drum 2 rotatably mounted on the vehicle, an operation panel 40 for manually operating the mixer drum 2, and a controller 20 as a mixer drum control device for controlling the drive of the mixer drum 2. ..
　ミキサドラム２は、架台３に回転可能に搭載される有底円筒形の容器であり、その後端には生コンの投入と排出とが行われる開口部２ａが設けられる。ミキサドラム２は、その回転軸Ｏが車両の前部から後部に向かって徐々に高くなるように傾斜して搭載される。ミキサドラム２内には、図示しないドラムブレードがドラム内壁面に沿って螺旋状に配設されており、ミキサドラム２とともにドラムブレードが回転することによって、ミキサドラム２内に積載された生コンの攪拌等が行われる。 The mixer drum 2 is a bottomed cylindrical container rotatably mounted on the gantry 3, and an opening 2a for loading and unloading ready-mixed concrete is provided at the rear end thereof. The mixer drum 2 is mounted so as to be inclined so that its rotation axis O gradually rises from the front portion to the rear portion of the vehicle. Drum blades (not shown) are spirally arranged in the mixer drum 2 along the inner wall surface of the drum, and the drum blades rotate together with the mixer drum 2 to stir the ready-mixed concrete loaded in the mixer drum 2. Will be.
　ミキサドラム２の開口部２ａの後方上部には、ホッパ１６が設けられる。生コン工場においてミキサ車１に投入される生コンは、ホッパ１６によって開口部２ａへと導かれる。ミキサドラム２の開口部２ａの後方下部には、フローガイド１７及びシュート１８が設けられる。開口部２ａから排出される生コンは、フローガイド１７によってシュート１８に導かれ、シュート１８によって所定の方向に排出される。 A hopper 16 is provided at the upper rear portion of the opening 2a of the mixer drum 2. The ready-mixed concrete put into the mixer truck 1 at the ready-mixed concrete factory is guided to the opening 2a by the hopper 16. A flow guide 17 and a chute 18 are provided at the lower rear portion of the opening 2a of the mixer drum 2. The ready-mixed concrete discharged from the opening 2a is guided to the chute 18 by the flow guide 17, and is discharged in a predetermined direction by the chute 18.
　ミキサドラム２は、ミキサ車１に搭載された走行用のエンジン１０を駆動源として、駆動装置４を介して回転駆動される。駆動装置４は、エンジン１０の回転によって駆動され、作動流体の流体圧によってミキサドラム２を回転駆動する流体圧装置である。 The mixer drum 2 is rotationally driven via a drive device 4 using a traveling engine 10 mounted on the mixer truck 1 as a drive source. The drive device 4 is a fluid pressure device that is driven by the rotation of the engine 10 and rotationally drives the mixer drum 2 by the fluid pressure of the working fluid.
　図２に示すように、エンジン１０は、エンジン１０の出力及び回転数を調整するためのスロットル弁１０ａを有する。スロットル弁１０ａの開度は、エンジン１０によって駆動装置４を駆動させる際に図示しないアクチュエータを介してコントローラ２０により制御される。また、エンジン１０には、エンジン１０の回転速度を検出し、検出された回転速度に応じた信号をコントローラ２０へ出力する回転センサ１０ｂが設けられる。 As shown in FIG. 2, the engine 10 has a throttle valve 10a for adjusting the output and the rotation speed of the engine 10. The opening degree of the throttle valve 10a is controlled by the controller 20 via an actuator (not shown) when the drive device 4 is driven by the engine 10. Further, the engine 10 is provided with a rotation sensor 10b that detects the rotation speed of the engine 10 and outputs a signal corresponding to the detected rotation speed to the controller 20.
　駆動装置４を駆動する際のエンジン１０の回転数は、回転センサ１０ｂによって検出された回転速度が所定の大きさとなるように、スロットル弁１０ａを介してコントローラ２０により制御される。なお、回転センサ１０ｂは、駆動装置４の入力軸である後述のＰＴＯ軸９やドライブシャフト８の回転速度を検出するものであってもよいし、後述の油圧ポンプ５の回転速度を検出するものであってもよい。 The rotation speed of the engine 10 when driving the drive device 4 is controlled by the controller 20 via the throttle valve 10a so that the rotation speed detected by the rotation sensor 10b becomes a predetermined magnitude. The rotation sensor 10b may detect the rotation speed of the PTO shaft 9 or the drive shaft 8 described later, which is the input shaft of the drive device 4, or may detect the rotation speed of the hydraulic pump 5 described later. May be.
　エンジン１０の回転は、エンジン１０から常時動力を取り出すＰＴＯ軸９（ＰＴＯ：Ｐｏｗｅｒ　ｔａｋｅ－ｏｆｆ）と、ＰＴＯ軸９と駆動装置４とを連結するドライブシャフト８と、を介して駆動装置４に伝達される。 The rotation of the engine 10 is transmitted to the drive device 4 via a PTO shaft 9 (PTO: Power take-off) that constantly takes out power from the engine 10 and a drive shaft 8 that connects the PTO shaft 9 and the drive device 4. Will be done.
　駆動装置４は、エンジン１０によって駆動され作動流体としての作動油を吐出する油圧ポンプ５と、油圧ポンプ５から供給される作動油によって作動しミキサドラム２を回転駆動する油圧モータ６と、を有する。なお、駆動装置４では、作動流体として作動油ではなく、他の非圧縮性流体が用いられてもよい。 The drive device 4 includes a hydraulic pump 5 driven by an engine 10 to discharge hydraulic oil as a hydraulic fluid, and a hydraulic motor 6 operated by hydraulic oil supplied from the hydraulic pump 5 to rotationally drive the mixer drum 2. In the drive device 4, instead of the hydraulic fluid, another incompressible fluid may be used as the hydraulic fluid.
　油圧ポンプ５は、図示しない斜板の傾転角に応じて吐出量が変更される斜板型アキシャルピストンポンプである。油圧ポンプ５は、油圧ポンプ５から油圧モータ６への作動油の流れを制御する制御弁５ａと、斜板の傾転角を変化させることで油圧ポンプ５の吐出量を調整する傾転角調整機構５ｂと、油圧モータ６に供給される作動油の圧力を検出する圧力センサ５ｃと、を有する。 The hydraulic pump 5 is a swash plate type axial piston pump whose discharge amount is changed according to the tilt angle of the swash plate (not shown). The hydraulic pump 5 includes a control valve 5a that controls the flow of hydraulic oil from the hydraulic pump 5 to the hydraulic motor 6, and a tilt angle adjustment that adjusts the discharge amount of the hydraulic pump 5 by changing the tilt angle of the swash plate. It has a mechanism 5b and a pressure sensor 5c that detects the pressure of hydraulic oil supplied to the hydraulic motor 6.
　油圧ポンプ５は、ＰＴＯ軸９を介してエンジン１０から常時取り出される動力によって回転駆動される。なお、油圧ポンプ５を回転駆動させる駆動源としては、走行用のエンジン１０に限定されず、走行に用いられない補機用のエンジンや電動モータであってもよい。 The hydraulic pump 5 is rotationally driven by the power constantly taken out from the engine 10 via the PTO shaft 9. The drive source for rotationally driving the hydraulic pump 5 is not limited to the traveling engine 10, and may be an auxiliary engine or an electric motor that is not used for traveling.
　油圧ポンプ５から吐出された作動油は油圧モータ６に供給され、油圧モータ６が回転する。油圧モータ６の回転は、減速機７を介してミキサドラム２に伝達される。油圧ポンプ５は、ポンプ吐出圧が導かれるアクチュエータ（図示省略）の作動により、アクチュエータに導かれるポンプ吐出圧が上昇するほど、斜板を付勢する傾転スプリングに抗してポンプ吐出量が小さくなるように制御される。アクチュエータに導かれるポンプ吐出圧は、ロードセンシング弁（図示省略）によって調整される。ロードセンシング弁は、油圧ポンプ５の吐出圧と油圧モータ６に供給される圧力（負荷圧）との差圧が所定値となるようにアクチュエータに導かれるポンプ吐出圧を調整する。 The hydraulic oil discharged from the hydraulic pump 5 is supplied to the hydraulic motor 6, and the hydraulic motor 6 rotates. The rotation of the hydraulic motor 6 is transmitted to the mixer drum 2 via the speed reducer 7. In the hydraulic pump 5, as the pump discharge pressure guided by the actuator increases due to the operation of the actuator (not shown) to which the pump discharge pressure is guided, the pump discharge amount becomes smaller against the tilting spring that urges the swash plate. Is controlled to be. The pump discharge pressure guided to the actuator is adjusted by a load sensing valve (not shown). The load sensing valve adjusts the pump discharge pressure guided to the actuator so that the differential pressure between the discharge pressure of the hydraulic pump 5 and the pressure (load pressure) supplied to the hydraulic motor 6 becomes a predetermined value.
　なお、油圧ポンプ５は、上記形式のポンプに限定されず、吐出容量が可変であるポンプであればどのような形式のポンプであってもよい。 The hydraulic pump 5 is not limited to the above type of pump, and may be any type of pump as long as it has a variable discharge capacity.
　油圧ポンプ５によってミキサドラム２が正転運転されるときには、ミキサドラム２内の生コンクリートが攪拌される。一方、油圧ポンプ５によってミキサドラム２が逆転運転されるときには、ミキサドラム２内の生コンクリートが後端の開口部からフローガイド１７及びシュート１８を介して外部へと排出される。 When the mixer drum 2 is rotated in the normal direction by the hydraulic pump 5, the ready-mixed concrete in the mixer drum 2 is agitated. On the other hand, when the mixer drum 2 is reversely operated by the hydraulic pump 5, the ready-mixed concrete in the mixer drum 2 is discharged to the outside from the opening at the rear end via the flow guide 17 and the chute 18.
　油圧モータ６は、容量が可変な斜板型アキシャルピストンモータである。油圧モータ６は、油圧ポンプ５から吐出された作動油の供給を受けて回転駆動される。油圧モータ６は、コントローラ２０からの二速切換信号を受信して斜板（図示省略）の傾転角を調整する電磁弁（図示省略）を備える。油圧モータ６の容量は、電磁弁が切り換えられることによって、高速回転用の小容量（２速）と通常回転用の大容量（１速）との二段階に切り換えられる。油圧モータ６は、容量が無段階で切り換えられるものであってもよい。 The hydraulic motor 6 is a swash plate type axial piston motor with a variable capacity. The hydraulic motor 6 is rotationally driven by receiving the supply of hydraulic oil discharged from the hydraulic pump 5. The hydraulic motor 6 includes a solenoid valve (not shown) that receives a second speed switching signal from the controller 20 and adjusts the tilt angle of the swash plate (not shown). The capacity of the hydraulic motor 6 is switched between a small capacity for high-speed rotation (2nd speed) and a large capacity for normal rotation (1st speed) by switching the solenoid valve. The hydraulic motor 6 may have a capacity that can be switched steplessly.
　油圧モータ６には、回転数検知器としての回転センサ６ａが設けられる。回転センサ６ａは、その出力軸（図示省略）の回転方向と出力軸の回転数を検知し、コントローラ２０に回転方向信号と回転数信号とを出力する。 The hydraulic motor 6 is provided with a rotation sensor 6a as a rotation speed detector. The rotation sensor 6a detects the rotation direction of the output shaft (not shown) and the rotation speed of the output shaft, and outputs a rotation direction signal and a rotation number signal to the controller 20.
　油圧ポンプ５と油圧モータ６の間には、閉回路Ｌが設けられ、この閉回路Ｌを作動油が循環するようになっている。この閉回路Ｌ中に電磁比例弁３１が設けられる。電磁比例弁３１は、油圧ポンプ５が吐出した作動油をミキサドラム２を正回転させるように油圧モータ６に導く正転位置３１Ａと、油圧ポンプ５が吐出した作動油をミキサドラム２を逆回転させるように油圧モータ６に導く逆転位置３１Ｂと、油圧ポンプ５から油圧モータ６への間の作動油の流れを遮断する中立位置３１Ｃと、を備える。 A closed circuit L is provided between the hydraulic pump 5 and the hydraulic motor 6, and hydraulic oil circulates in the closed circuit L. An electromagnetic proportional valve 31 is provided in the closed circuit L. The electromagnetic proportional valve 31 has a normal rotation position 31A that guides the hydraulic oil discharged by the hydraulic pump 5 to the hydraulic motor 6 so as to rotate the mixer drum 2 in the forward direction, and causes the hydraulic oil discharged by the hydraulic pump 5 to rotate in the reverse direction. A reverse position 31B leading to the hydraulic motor 6 and a neutral position 31C for blocking the flow of hydraulic oil from the hydraulic pump 5 to the hydraulic motor 6 are provided.
　電磁比例弁３１は、一対のソレノイド３２ａ，３２ｂ及び一対のリターンスプリング３３ａ，３３ｂを有する。一対のソレノイド３２ａ，３２ｂは、コントローラ２０から出力される制御信号によって作動する。制御信号とは、具体的には、電流値である。この電流値を調整することで、電磁比例弁３１は、正転位置３１Ａ、中立位置３１Ｃ、及び逆転位置３１Ｂによりそのポジションが無段階に切り換えられる。 The electromagnetic proportional valve 31 has a pair of solenoids 32a and 32b and a pair of return springs 33a and 33b. The pair of solenoids 32a and 32b are operated by a control signal output from the controller 20. Specifically, the control signal is a current value. By adjusting this current value, the position of the electromagnetic proportional valve 31 is steplessly switched by the forward rotation position 31A, the neutral position 31C, and the reverse rotation position 31B.
　電磁比例弁３１は、一方のソレノイド３２ａへ通電されることで、その通電量に応じた開度で正転位置３１Ａに切り換えられる。これにより、油圧モータ６には、電磁比例弁３１の開度に応じた流量の作動油が、ミキサドラム２を正転方向に回転させるように供給される。 By energizing one of the solenoids 32a, the electromagnetic proportional valve 31 is switched to the normal rotation position 31A at an opening degree according to the amount of energization. As a result, the hydraulic motor 6 is supplied with hydraulic oil having a flow rate corresponding to the opening degree of the electromagnetic proportional valve 31 so as to rotate the mixer drum 2 in the forward rotation direction.
　反対に、電磁比例弁３１は、他方のソレノイド３２ｂへ通電されることで、その通電量に応じた開度で逆転位置３１Ｂに切り換えられる。これにより、油圧モータ６には、電磁比例弁３１の開度に応じた流量の作動油が、ミキサドラム２を逆転方向に回転させるように供給される。なお、電磁比例弁３１は、ソレノイド３２ａ，３２ｂへの通電量が大きいほど、開度が大きくなり多くの流量が油圧モータ６に導かれる。 On the contrary, the electromagnetic proportional valve 31 is switched to the reversing position 31B at an opening degree according to the amount of energization by energizing the other solenoid 32b. As a result, the hydraulic motor 6 is supplied with hydraulic oil having a flow rate corresponding to the opening degree of the electromagnetic proportional valve 31 so as to rotate the mixer drum 2 in the reverse direction. The opening degree of the electromagnetic proportional valve 31 increases as the amount of energization to the solenoids 32a and 32b increases, and a large flow rate is guided to the hydraulic motor 6.
　電磁比例弁３１は、一対のソレノイド３２ａ，３２ｂへの通電が遮断されると、一対のリターンスプリング３３ａ，３３ｂの付勢力によって中立位置３１Ｃに切り換えられる。中立位置３１Ｃでは、油圧モータ６への作動油の供給が遮断されるため、油圧モータ６は回転駆動されない。 When the energization of the pair of solenoids 32a and 32b is cut off, the electromagnetic proportional valve 31 is switched to the neutral position 31C by the urging force of the pair of return springs 33a and 33b. At the neutral position 31C, the supply of hydraulic oil to the hydraulic motor 6 is cut off, so that the hydraulic motor 6 is not rotationally driven.
　上記構成の駆動装置４において、油圧ポンプ５から吐出された作動油が油圧モータ６に供給されることによって油圧モータ６が回転し、供給される作動油の流れ、油量や油圧モータ６の斜板の傾転角に応じて、油圧モータ６の回転速度が変更される。また、油圧モータ６の回転方向は、油圧ポンプ５の制御弁５ａの位置が切り換えられることで切り換わる。 In the drive device 4 having the above configuration, the hydraulic motor 6 is supplied by supplying the hydraulic oil discharged from the hydraulic pump 5 to the hydraulic motor 6, and the flow of the hydraulic oil supplied, the amount of oil, and the inclination of the hydraulic motor 6 are inclined. The rotation speed of the hydraulic motor 6 is changed according to the tilt angle of the plate. Further, the rotation direction of the hydraulic motor 6 is switched by switching the position of the control valve 5a of the hydraulic pump 5.
　駆動装置４の出力軸、すなわち油圧モータ６の出力軸は、減速機７を介してミキサドラム２の回転軸Ｏに連結される。このため、油圧モータ６の回転速度を増減することによって、ミキサドラム２の回転速度を増減させることが可能である。また、油圧モータ６の回転方向を切り換えることによって、ミキサドラム２の回転方向を正回転方向である投入方向と逆回転方向である排出方向とに切り換えることが可能である。 The output shaft of the drive device 4, that is, the output shaft of the hydraulic motor 6, is connected to the rotary shaft O of the mixer drum 2 via the speed reducer 7. Therefore, it is possible to increase or decrease the rotation speed of the mixer drum 2 by increasing or decreasing the rotation speed of the hydraulic motor 6. Further, by switching the rotation direction of the hydraulic motor 6, it is possible to switch the rotation direction of the mixer drum 2 between the charging direction which is the forward rotation direction and the discharge direction which is the reverse rotation direction.
　このように、ミキサドラム２の回転数及び回転方向は、油圧モータ６の回転数及び回転方向に相関することから、油圧モータ６の回転センサ６ａの検出値からミキサドラム２の回転数及び回転方向を把握することが可能である。なお、回転センサ６ａは、油圧モータ６に代えて、ミキサドラム２の回転数及び回転方向を検出するものであってもよい。 As described above, since the rotation speed and the rotation direction of the mixer drum 2 correlate with the rotation speed and the rotation direction of the hydraulic motor 6, the rotation speed and the rotation direction of the mixer drum 2 can be grasped from the detection value of the rotation sensor 6a of the hydraulic motor 6. It is possible to do. The rotation sensor 6a may detect the rotation speed and the rotation direction of the mixer drum 2 instead of the hydraulic motor 6.
　ミキサドラム２が投入方向に回転駆動されると、ミキサドラム２内の生コンはドラムブレードにより攪拌されながら前方へと移動する。一方、ミキサドラム２が排出方向に回転駆動されると、ミキサドラム２内の生コンはドラムブレードにより攪拌されながら後方へと移動する。 When the mixer drum 2 is rotationally driven in the loading direction, the ready-mixed concrete in the mixer drum 2 moves forward while being agitated by the drum blade. On the other hand, when the mixer drum 2 is rotationally driven in the discharge direction, the ready-mixed concrete in the mixer drum 2 moves backward while being agitated by the drum blade.
　このようにミキサドラム２を投入方向とは反対の方向である排出方向に回転させることで、ミキサドラム２の開口部２ａから生コンを排出することができる。ミキサドラム２から排出された生コンは、フローガイド１７及びシュート１８を介して所定位置に誘導される。 By rotating the mixer drum 2 in the discharge direction opposite to the charging direction in this way, the ready-mixed concrete can be discharged from the opening 2a of the mixer drum 2. The ready-mixed concrete discharged from the mixer drum 2 is guided to a predetermined position via the flow guide 17 and the chute 18.
　なお、ホッパ１６を介して、ミキサドラム２内へ生コンを投入する場合には、攪拌時よりもミキサドラム２を高速で投入方向に回転させることで、投入された生コンを速やかにミキサドラム２の前方へと移動させる。 When the ready-mixed concrete is charged into the mixer drum 2 via the hopper 16, the mixed ready-mixed concrete is rotated in the charging direction at a higher speed than during stirring, so that the charged ready-mixed concrete is quickly moved to the front of the mixer drum 2. Move it.
　コントローラ２０は、ＣＰＵ（中央演算処理装置）、ＲＯＭ（リードオンリメモリ）、ＲＡＭ（ランダムアクセスメモリ）、及びＩ／Ｏインターフェース（入出力インターフェース）等を備えたマイクロコンピュータで構成される。ＲＡＭはＣＰＵの処理におけるデータを記憶し、ＲＯＭはＣＰＵの制御プログラム等を予め記憶し、Ｉ／Ｏインターフェースは接続された機器との情報の入出力に使用される。ＣＰＵやＲＡＭ等をＲＯＭに格納されたプログラムに従って動作させることによって、駆動装置４の作動が制御される。 The controller 20 is composed of a microcomputer equipped with a CPU (central processing unit), ROM (read-only memory), RAM (random access memory), I / O interface (input / output interface), and the like. The RAM stores data in the processing of the CPU, the ROM stores the control program of the CPU in advance, and the I / O interface is used for input / output of information with the connected device. The operation of the drive device 4 is controlled by operating the CPU, RAM, or the like according to a program stored in the ROM.
　コントローラ２０には、上記のように、油圧モータ６の回転センサ６ａと、エンジン１０の回転センサ１０ｂと、油圧ポンプ５の圧力センサ５ｃと、が接続されるとともに、車両の車速を検出する車速センサ２１が接続され、これらのセンサ類で検出された検出値が入力される。また、コントローラ２０には、パーキングブレーキ１２の作動状態を検出するパーキングブレーキスイッチ２２が接続され、パーキングブレーキ１２の作動及び非作動を示すパーキング信号が入力される。また、コントローラ２０には、上記のように、電磁比例弁３１と、スロットル弁１０ａと、が接続され、これらを作動させる指令値がコントローラ２０から出力される。 As described above, the rotation sensor 6a of the hydraulic motor 6, the rotation sensor 10b of the engine 10, and the pressure sensor 5c of the hydraulic pump 5 are connected to the controller 20, and the vehicle speed sensor that detects the vehicle speed of the vehicle is detected. 21 is connected, and the detection value detected by these sensors is input. Further, a parking brake switch 22 for detecting the operating state of the parking brake 12 is connected to the controller 20, and a parking signal indicating the operation or non-operation of the parking brake 12 is input. Further, as described above, the electromagnetic proportional valve 31 and the throttle valve 10a are connected to the controller 20, and a command value for operating them is output from the controller 20.
　さらに、コントローラ２０には、ミキサドラム２の回転方向及び回転速度を手動で操作するための操作盤４０が接続される。操作盤４０は、運転室１１内に設けられる第１操作盤４１と、ミキサ車１の右後方に設けられる第２操作盤４２と、ミキサ車１の左後方に設けられる第３操作盤４３と、ホッパ１６付近に設けられる第４操作盤４４と、を有する。 Further, an operation panel 40 for manually operating the rotation direction and rotation speed of the mixer drum 2 is connected to the controller 20. The operation panel 40 includes a first operation panel 41 provided in the driver's cab 11, a second operation panel 42 provided on the right rear side of the mixer truck 1, and a third operation panel 43 provided on the left rear side of the mixer truck 1. It has a fourth operation panel 44 provided near the hopper 16.
　第１操作盤４１は、車両が走行中であってもミキサドラム２の操作を可能とするために運転室１１内に設けられる。第１操作盤４１には、ミキサドラム２の回転方向及び回転速度を変更するためのダイヤルつまみ型のポテンショメータ４１ａと、非常時にミキサドラム２の回転を停止させるための非常停止スイッチ４１ｂと、ミキサドラム２の自動撹拌を解除するための自動撹拌解除スイッチ４１ｃと、が設けられる。後述のように、自動撹拌解除スイッチ４１ｃがオンにされてから所定時間以内にロック解除操作がされると、ミキサドラム２の自動撹拌が解除される。このため、ミキサ車１が走行中であっても、コントローラ２０は、ポテンショメータ４１ａの回動操作に応じてミキサドラム２を回転させることができる。よって、例えば、車両を極低速で走行させた状態においてミキサドラム２内の生コンを排出させることが可能である。 The first operation panel 41 is provided in the driver's cab 11 so that the mixer drum 2 can be operated even while the vehicle is running. The first operation panel 41 includes a dial knob type potentiometer 41a for changing the rotation direction and rotation speed of the mixer drum 2, an emergency stop switch 41b for stopping the rotation of the mixer drum 2 in an emergency, and an automatic mixer drum 2. An automatic stirring release switch 41c for canceling stirring is provided. As will be described later, when the lock release operation is performed within a predetermined time after the automatic stirring release switch 41c is turned on, the automatic stirring of the mixer drum 2 is released. Therefore, even when the mixer truck 1 is running, the controller 20 can rotate the mixer drum 2 in response to the rotation operation of the potentiometer 41a. Therefore, for example, it is possible to discharge the ready-mixed concrete in the mixer drum 2 while the vehicle is running at an extremely low speed.
　第２操作盤４２は、車両の右側へシュート１８を介して排出される生コンの量を見ながらミキサドラム２の操作を可能とするためにミキサ車１の右後方に設けられる。第２操作盤４２には、ミキサドラム２の回転方向及び回転速度を変更するためのダイヤルつまみ型のポテンショメータ４２ａと、非常時にミキサドラム２の回転を停止させるための非常停止スイッチ４２ｂと、が設けられる。 The second operation panel 42 is provided on the right rear side of the mixer truck 1 in order to enable the operation of the mixer drum 2 while observing the amount of ready-mixed concrete discharged to the right side of the vehicle via the chute 18. The second operation panel 42 is provided with a dial knob type potentiometer 42a for changing the rotation direction and rotation speed of the mixer drum 2, and an emergency stop switch 42b for stopping the rotation of the mixer drum 2 in an emergency.
　第３操作盤４３は、車両の左側へシュート１８を介して排出される生コンの量を見ながらミキサドラム２の操作を可能とするためにミキサ車１の左後方に設けられる。例えば、ミキサ車１を２台並べた状態において生コンを排出する際に、一方の車両の右後方に設けられた第２操作盤４２を操作しつつ、他方の車両の左後方に設けられた第３操作盤４３を操作することができる。これによって、生コンを途切れることなく供給したり多量の生コンを供給したりすることができる。 The third operation panel 43 is provided on the left rear side of the mixer truck 1 in order to enable the operation of the mixer drum 2 while observing the amount of ready-mixed concrete discharged to the left side of the vehicle via the chute 18. For example, when discharging ready-mixed concrete in a state where two mixer trucks 1 are arranged side by side, a second operation panel 42 provided on the right rear side of one vehicle is operated while a second operation panel 42 provided on the left rear side of the other vehicle is operated. 3 The operation panel 43 can be operated. This makes it possible to supply ready-mixed concrete without interruption or to supply a large amount of ready-mixed concrete.
　第３操作盤４３には、第２操作盤４２と同様に、ミキサドラム２の回転方向及び回転速度を変更するためのダイヤルつまみ型のポテンショメータ４３ａと、非常時にミキサドラム２の回転を停止させるための非常停止スイッチ４３ｂと、が設けられる。 Similar to the second operation panel 42, the third operation panel 43 includes a dial knob type potentiometer 43a for changing the rotation direction and rotation speed of the mixer drum 2, and an emergency for stopping the rotation of the mixer drum 2 in an emergency. A stop switch 43b and the like are provided.
　第４操作盤４４は、ミキサドラム２内の生コンの残量を確認しながらミキサドラム２の操作を可能とするためにホッパ１６の周辺、すなわち車両の上方に設けられる。第４操作盤４４には、第２操作盤４２及び第３操作盤４３と同様に、ミキサドラム２の回転方向及び回転速度を変更するためのダイヤルつまみ型のポテンショメータ４４ａと、非常時にミキサドラム２の回転を停止させるための非常停止スイッチ４４ｂと、が設けられる。 The fourth operation panel 44 is provided around the hopper 16, that is, above the vehicle, so that the mixer drum 2 can be operated while checking the remaining amount of ready-mixed concrete in the mixer drum 2. Similar to the second operation panel 42 and the third operation panel 43, the fourth operation panel 44 includes a dial knob type potentiometer 44a for changing the rotation direction and rotation speed of the mixer drum 2, and the rotation of the mixer drum 2 in an emergency. An emergency stop switch 44b for stopping the engine is provided.
　操作盤４０の各操作盤４１～４４は、車両に固定された据付型であってもよいし、車両にケーブルを介して接続され取り外すことが可能な着脱型であってもよい。 Each of the operation panels 41 to 44 of the operation panel 40 may be a stationary type fixed to the vehicle, or may be a removable type that is connected to the vehicle via a cable and can be removed.
　各操作盤４１～４４に設けられるポテンショメータ４１ａ～４４ａは、回動操作量に応じて電気抵抗値が変化する可変抵抗器である。作業者によりポテンショメータ４１ａ～４４ａが回動操作されると、コントローラ２０は、ミキサドラム２の回転状態が、ポテンショメータ４１ａ～４４ａの電気抵抗値に応じた状態となるように、油圧ポンプ５の斜板の傾転角や油圧モータ６の斜板の傾転角、油圧ポンプ５の制御弁５ａといった駆動装置４を構成する各機構を制御する。 The potentiometers 41a to 44a provided on the operation panels 41 to 44 are variable resistors whose electric resistance value changes according to the amount of rotation operation. When the potentiometers 41a to 44a are rotated by the operator, the controller 20 determines that the rotational state of the mixer drum 2 is in a state corresponding to the electric resistance value of the potentiometers 41a to 44a in the swash plate of the hydraulic pump 5. It controls each mechanism constituting the drive device 4, such as the tilt angle, the tilt angle of the swash plate of the hydraulic motor 6, and the control valve 5a of the hydraulic pump 5.
　具体的には、ポテンショメータ４１ａ～４４ａは、ミキサドラム２を投入方向に回転させる投入位置と、ミキサドラム２を排出方向に回転させる排出位置と、投入位置と排出位置との間に位置しミキサドラム２の回転を停止させる中立位置と、投入位置の中でミキサドラム２の回転速度が最大となる最大投入位置と、排出位置の中でミキサドラム２の回転速度が最大となる最大排出位置と、を有する。例えば、第１操作盤４１において作業者によりポテンショメータ４１ａが中立位置から時計回り方向に回動操作されると、ポテンショメータ４１ａは投入位置になり、コントローラ２０は、ポテンショメータ４１ａの電気抵抗値に応じた回転速度でミキサドラム２を投入方向へと回転させる。ポテンショメータ４１ａが時計回り方向に最大まで回動操作されると、ポテンショメータ４１ａは最大投入位置となり、投入位置の中でミキサドラム２の回転速度が最大となる。反対に、作業者によりポテンショメータ４１ａが中立位置から反時計回り方向に回動操作されると、ポテンショメータ４１ａは排出位置になり、コントローラ２０は、ポテンショメータ４１ａの電気抵抗値に応じた回転速度でミキサドラム２を排出方向へと回転させる。ポテンショメータ４１ａが反時計回り方向に最大まで回動操作されると、ポテンショメータ４１ａは最大排出位置となり、排出位置の中でミキサドラム２の回転速度が最大となる。 Specifically, the potential meters 41a to 44a are located between the loading position where the mixer drum 2 is rotated in the loading direction, the discharging position where the mixer drum 2 is rotated in the discharging direction, and the loading position and the discharging position, and the rotation of the mixer drum 2 is performed. It has a neutral position for stopping the engine, a maximum charging position where the rotational speed of the mixer drum 2 is maximum in the charging position, and a maximum discharging position where the rotational speed of the mixer drum 2 is maximum in the discharging position. For example, when the potentiometer 41a is rotated clockwise from the neutral position on the first operation panel 41, the potentiometer 41a is in the closing position and the controller 20 is rotated according to the electric resistance value of the potentiometer 41a. The mixer drum 2 is rotated in the loading direction at a speed. When the potentiometer 41a is rotated to the maximum in the clockwise direction, the potentiometer 41a reaches the maximum closing position, and the rotation speed of the mixer drum 2 becomes the maximum in the closing position. On the contrary, when the potentiometer 41a is rotated counterclockwise from the neutral position by the operator, the potentiometer 41a is in the discharge position, and the controller 20 moves the mixer drum 2 at a rotation speed corresponding to the electric resistance value of the potentiometer 41a. Is rotated in the discharge direction. When the potentiometer 41a is rotated to the maximum in the counterclockwise direction, the potentiometer 41a reaches the maximum discharge position, and the rotation speed of the mixer drum 2 becomes the maximum in the discharge position.
　なお、ポテンショメータ４１ａ～４４ａは、回動操作されるダイヤルつまみ型のものではなく、スライド操作されるリニア型のものであってもよい。 Note that the potentiometers 41a to 44a may be of a linear type that is operated by sliding instead of a dial knob type that is operated by rotation.
　第１操作盤４１、第２操作盤４２、第３操作盤４３、及び第４操作盤４４（以下、これらを総称して単に「操作盤４０」とする。）は、後述するように、ミキサ車１の走行状態及び自動撹拌解除スイッチ４１ｃのオン、オフの状態に応じて、操作権利が付与される。 The first operation panel 41, the second operation panel 42, the third operation panel 43, and the fourth operation panel 44 (hereinafter, these are collectively referred to simply as "operation panel 40") are mixers as described later. Operation rights are granted according to the traveling state of the vehicle 1 and the on / off state of the automatic stirring release switch 41c.
　コントローラ２０は、パーキングブレーキスイッチ２２からの信号と車速センサ２１の検出値とに基づいてミキサ車１が走行中であるか否かを判定する。具体的には、コントローラ２０は、パーキングブレーキスイッチ２２からの信号がパーキングブレーキ１２の非作動を示し、かつ、車速が０より大きい状態では、ミキサ車１が走行中である走行状態であると判定する。車速が０より大きい状態とは、ミキサ車１が移動している状態のことである。 The controller 20 determines whether or not the mixer truck 1 is running based on the signal from the parking brake switch 22 and the detection value of the vehicle speed sensor 21. Specifically, the controller 20 determines that the mixer truck 1 is in a running state when the signal from the parking brake switch 22 indicates that the parking brake 12 is not operating and the vehicle speed is higher than 0. do. The state where the vehicle speed is higher than 0 is the state where the mixer truck 1 is moving.
　コントローラ２０は、ミキサ車１が走行状態では操作盤４０の操作に関わらずミキサドラム２の自動撹拌を行う。ミキサドラム２の自動撹拌とは、自動でミキサドラム２を投入方向に回転させ搭載物の撹拌を行うことである。具体的には、コントローラ２０は、ミキサ車１が走行中であると判定すると、生コンの排出を防止するとともに生コンの品質を維持するために、ミキサドラム２を投入方向に回転させてミキサドラム２内の生コンを撹拌する、ミキサドラム２の自動撹拌を実行する。 The controller 20 automatically agitates the mixer drum 2 regardless of the operation of the operation panel 40 when the mixer truck 1 is running. The automatic stirring of the mixer drum 2 is to automatically rotate the mixer drum 2 in the loading direction to stir the load. Specifically, when the controller 20 determines that the mixer truck 1 is running, the controller 20 rotates the mixer drum 2 in the loading direction in order to prevent the discharge of the ready-mixed concrete and maintain the quality of the ready-mixed concrete in the mixer drum 2. Automatic stirring of the mixer drum 2 for stirring the ready-mixed concrete is performed.
　パーキングブレーキスイッチ２２からの信号がパーキングブレーキ１２の作動を示す状態、つまり、ミキサ車１が停車中でミキサドラム２の自動撹拌が停止した状態では、コントローラ２０によって、ミキサドラム２内の生コンを排出可能なように操作盤４０にミキサドラム２の操作権利が与えられる。これに対し、ミキサ車１が走行中でミキサドラム２の自動撹拌が行われている状態では、操作盤４０にミキサドラム２の操作権利が与えられない。しかし、ミキサ車１が走行中であっても必要な際は生コンを排出できるように、第１操作盤４１の自動撹拌解除スイッチ４１ｃがオンにされた状態では、ミキサドラム２の自動撹拌が行われている状態であっても、操作盤４０にミキサドラム２の操作権利が与えられる。 When the signal from the parking brake switch 22 indicates the operation of the parking brake 12, that is, when the mixer truck 1 is stopped and the automatic stirring of the mixer drum 2 is stopped, the ready-mixed concrete in the mixer drum 2 can be discharged by the controller 20. As described above, the operation panel 40 is given the operation right of the mixer drum 2. On the other hand, when the mixer truck 1 is running and the mixer drum 2 is automatically agitated, the operation panel 40 is not given the operation right of the mixer drum 2. However, the mixer drum 2 is automatically stirred when the automatic stirring release switch 41c of the first operation panel 41 is turned on so that the ready-mixed concrete can be discharged when necessary even while the mixer truck 1 is running. Even in this state, the operation panel 40 is given the operation right of the mixer drum 2.
　以下では、図３を参照して、コントローラ２０による操作盤４０へのミキサドラム２の操作権利の付与について具体的に説明する。図３は、コントローラ２０が操作盤４０によるミキサドラム２の操作を可能とする処理手順を示すフローチャートである。 In the following, with reference to FIG. 3, the granting of the operation right of the mixer drum 2 to the operation panel 40 by the controller 20 will be specifically described. FIG. 3 is a flowchart showing a processing procedure that enables the controller 20 to operate the mixer drum 2 by the operation panel 40.
　コントローラ２０は、イグニッションスイッチのオン信号を受信した場合、つまり、自車両のエンジンが始動した場合に、図３に示す処理を所定の時間間隔ごとに繰り返して実行する。 The controller 20 repeatedly executes the process shown in FIG. 3 at predetermined time intervals when the ignition switch ON signal is received, that is, when the engine of the own vehicle is started.
　コントローラ２０は、まず、ステップＳ１０１において、ミキサ車１が走行状態か否かの判定をする。具体的には、前述のように、パーキングブレーキスイッチ２２からの信号がパーキングブレーキ１２の非作動を示し、かつ、車速が０より大きい状態では、ミキサ車１が走行状態であると判定する。ミキサ車１が走行状態でない場合は、ステップＳ１０２へと進み、操作盤４０にミキサドラム２の操作権利を与えるとともに操作盤４０によるミキサドラム２の操作を可能とし、処理を終了する。つまり、ミキサ車１は、走行状態でない、言い換えると、停車状態では、操作盤４０によるミキサドラム２の操作が可能であり、操作盤４０により生コンを排出できる。ミキサ車１が走行状態である場合は、ステップＳ１０３へと進む。 First, in step S101, the controller 20 determines whether or not the mixer truck 1 is in a traveling state. Specifically, as described above, when the signal from the parking brake switch 22 indicates that the parking brake 12 is not operating and the vehicle speed is higher than 0, it is determined that the mixer truck 1 is in the traveling state. If the mixer truck 1 is not in the traveling state, the process proceeds to step S102, the operation panel 40 is given the operation right of the mixer drum 2, and the mixer drum 2 can be operated by the operation panel 40, and the process is terminated. That is, the mixer truck 1 is not in the running state, in other words, in the stopped state, the mixer drum 2 can be operated by the operation panel 40, and the ready-mixed concrete can be discharged by the operation panel 40. If the mixer truck 1 is in the traveling state, the process proceeds to step S103.
　ステップＳ１０３では、自動撹拌解除スイッチ４１ｃがオンであるか否かの判定をする。自動撹拌解除スイッチ４１ｃがオフであれば、ステップＳ１０４へと進み、操作盤４０にミキサドラム２の操作権利を与えず、操作盤４０によるミキサドラム２の操作を不可能とし、処理を終了する。つまり、ミキサ車１は、走行状態でありミキサドラム２の自動撹拌がされている状態では、操作盤４０によるミキサドラム２の操作が不可能であり、生コンを排出できない。自動撹拌解除スイッチ４１ｃがオンであれば、ステップＳ１０５へと進み、操作盤４０にミキサドラム２の操作権利を与える。ここでは、ステップＳ１０２とは異なり、操作盤４０にミキサドラム２の操作権利を与えるのみであり、この状態では、操作盤４０によるミキサドラム２の操作は不可能である。 In step S103, it is determined whether or not the automatic stirring release switch 41c is on. If the automatic stirring release switch 41c is off, the process proceeds to step S104, the operation panel 40 is not given the operation right of the mixer drum 2, the operation panel 40 cannot operate the mixer drum 2, and the process ends. That is, in the state where the mixer truck 1 is in a running state and the mixer drum 2 is automatically agitated, the mixer drum 2 cannot be operated by the operation panel 40, and the ready-mixed concrete cannot be discharged. If the automatic stirring release switch 41c is on, the process proceeds to step S105, and the operation panel 40 is given the operation right of the mixer drum 2. Here, unlike step S102, only the operation right of the mixer drum 2 is given to the operation panel 40, and in this state, the operation panel 40 cannot operate the mixer drum 2.
　ここで、操作盤にミキサドラムの操作権利を与えるとともに操作盤によるミキサドラムの操作を可能とすると、誤って操作盤に人や物が接触してしまうと、ミキサドラムが誤操作されるおそれがある。特に、ミキサ車の走行中にミキサドラムが誤操作されると、走行中に搭載物が意図せずに排出されるおそれがある。 Here, if the operation panel is given the right to operate the mixer drum and the mixer drum can be operated by the operation panel, if a person or an object accidentally comes into contact with the operation panel, the mixer drum may be erroneously operated. In particular, if the mixer drum is erroneously operated while the mixer truck is running, the load may be unintentionally ejected while the mixer truck is running.
　これに対し、本実施形態に係るミキサ車１のコントローラ２０は、ミキサ車１の走行状態に応じて操作盤４０にミキサドラム２の操作権利を与える。コントローラ２０は、ミキサ車１が走行中の走行状態では、操作盤４０にミキサドラム２の操作権利を付与する。ミキサ車１が走行中で操作盤４０に操作権利が付与された状態において、操作盤４０を用いてロック解除操作がされると、コントローラ２０にはロック解除操作に応じた信号が入力される。これにより、コントローラ２０は、操作盤４０によるミキサドラム２の操作が可能となるように制御する。操作盤４０に操作権利が付与された状態であっても、操作盤４０を用いてロック解除操作がされる前、つまり、コントローラ２０がロック解除操作による信号を受信していない状態では、コントローラ２０は、操作盤４０が操作されたとしても、操作盤４０の操作に応じたミキサドラム２の駆動は行わない。 On the other hand, the controller 20 of the mixer truck 1 according to the present embodiment gives the operation panel 40 the operation right of the mixer drum 2 according to the traveling state of the mixer truck 1. The controller 20 grants the operation panel 40 the right to operate the mixer drum 2 while the mixer truck 1 is running. When the unlocking operation is performed using the operation panel 40 while the mixer truck 1 is running and the operation right is granted to the operation panel 40, a signal corresponding to the unlock operation is input to the controller 20. As a result, the controller 20 controls so that the mixer drum 2 can be operated by the operation panel 40. Even if the operation right is granted to the operation panel 40, before the unlock operation is performed using the operation panel 40, that is, when the controller 20 has not received the signal due to the unlock operation, the controller 20 Does not drive the mixer drum 2 in response to the operation of the operation panel 40 even if the operation panel 40 is operated.
　具体的には、コントローラ２０は、ステップＳ１０５において操作盤４０にミキサドラム２の操作権利を与えると、ステップＳ１０６へと進む。ステップＳ１０６では、自動撹拌解除スイッチ４１ｃがオンにされてから所定時間以内に操作盤４０を用いてロック解除操作がされたか否かの判定をする。ロック解除操作は、操作盤４０によるミキサドラム２の誤操作を防止するものである。ロック解除操作がされていない状態では、ステップＳ１０７へと進み、操作盤４０にミキサドラム２の操作権利が与えられていても、操作盤４０によるミキサドラム２の操作を不可能とし、処理を終了する。ここまでの処理が所定の時間間隔ごとに繰り返して実行される中で、ロック解除操作がされた状態になると、ステップＳ１０６での判断が「ＹＥＳ」となってステップＳ１０８へと進む。そして、ミキサドラム２の自動撹拌を解除し、操作盤４０によるミキサドラム２の操作を可能とし、処理を終了する。 Specifically, when the controller 20 gives the operation panel 40 the operation right of the mixer drum 2 in step S105, the controller 20 proceeds to step S106. In step S106, it is determined whether or not the lock release operation has been performed using the operation panel 40 within a predetermined time after the automatic stirring release switch 41c is turned on. The unlock operation is to prevent erroneous operation of the mixer drum 2 by the operation panel 40. In the state where the unlock operation is not performed, the process proceeds to step S107, and even if the operation panel 40 is given the operation right of the mixer drum 2, the operation panel 40 cannot operate the mixer drum 2, and the process ends. While the processes up to this point are repeatedly executed at predetermined time intervals, when the unlock operation is performed, the determination in step S106 becomes "YES" and the process proceeds to step S108. Then, the automatic stirring of the mixer drum 2 is canceled, the mixer drum 2 can be operated by the operation panel 40, and the process is completed.
　このように、コントローラ２０は、ミキサ車１が走行状態で操作盤４０に操作権利が付与された状態であっても、ロック解除操作がされるまでは操作盤４０によるミキサドラム２の操作を受け付けないため、誤って操作盤４０に接触してもミキサドラム２が操作されることがない。これにより、ミキサ車１の走行中のミキサドラム２の誤操作が防止される。 As described above, even if the mixer truck 1 is in a running state and the operation panel 40 is granted an operation right, the controller 20 does not accept the operation of the mixer drum 2 by the operation panel 40 until the lock release operation is performed. Therefore, even if the operation panel 40 is accidentally touched, the mixer drum 2 will not be operated. This prevents erroneous operation of the mixer drum 2 while the mixer truck 1 is running.
　また、コントローラ２０は、自動撹拌を解除するための自動撹拌解除スイッチ４１ｃがオンにされてから所定時間以内にロック解除操作がされると、自動撹拌が解除され、操作盤４０によるミキサドラム２の操作が可能となるように制御する。つまり、自動撹拌解除スイッチ４１ｃがオンされてからロック解除操作がされるまでの間の時間が所定時間以内であれば、コントローラ２０は、操作盤４０によるミキサドラム２の操作を可能にする。自動撹拌解除スイッチ４１ｃがオンにされてから所定時間が経過すると、ロック解除操作を行ってもミキサドラム２の自動撹拌が解除されず、操作盤４０によるミキサドラム２の操作が不能となり、ミキサドラム２が意図せずに操作されることがない。これにより、ミキサ車１の走行中のミキサドラム２の誤操作が確実に防止される。なお、コントローラ２０は、自動撹拌解除スイッチ４１ｃがオンにされてからロック解除操作がされるまでの間が所定時間以上経過した場合であっても、ミキサドラム２の自動撹拌を解除し、操作盤４０によるミキサドラム２の操作が可能となるように制御してもよい。 Further, when the lock release operation of the controller 20 is performed within a predetermined time after the automatic stirring release switch 41c for canceling the automatic stirring is turned on, the automatic stirring is released and the mixer drum 2 is operated by the operation panel 40. Is controlled so that That is, if the time from when the automatic stirring release switch 41c is turned on to when the lock release operation is performed is within a predetermined time, the controller 20 enables the mixer drum 2 to be operated by the operation panel 40. When a predetermined time has elapsed after the automatic stirring release switch 41c is turned on, the automatic stirring of the mixer drum 2 is not released even if the lock release operation is performed, the operation of the mixer drum 2 by the operation panel 40 becomes impossible, and the mixer drum 2 is intended. It will not be operated without it. As a result, erroneous operation of the mixer drum 2 while the mixer truck 1 is running is reliably prevented. The controller 20 releases the automatic stirring of the mixer drum 2 even when a predetermined time or more has elapsed from the time when the automatic stirring release switch 41c is turned on until the lock release operation is performed, and the operation panel 40 cancels the automatic stirring. It may be controlled so that the mixer drum 2 can be operated by the above.
　また、操作盤４０は、ミキサドラム２の回転を制御するダイヤルとしてのポテンショメータ４１ａ，４２ａ，４３ａ，４４ａを有する。コントローラ２０は、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａが中立位置と最大投入位置との間の所定の区間を往復する操作がされると、ロック解除操作がされたと判定し、操作盤４０によるミキサドラム２の操作が可能となるように制御する。例えば、コントローラ２０は、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａのいずれかが、投入位置におけるミキサドラム２の回転速度が最大投入位置を１００％としたときの１０％である位置と、投入位置におけるミキサドラム２の回転速度が最大投入位置を１００％としたときの９５％である位置と、の間を往復する操作がされると、ロック解除操作がされたと判定する。ここで、通常はミキサ車１の走行中には、ミキサドラム２に生コンが投入されることはないため、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａを投入位置に合わせるということは行われない。よって、ロック解除操作は、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａを投入位置に合わせるというミキサ車１の走行中には通常行われない操作を含むため、意図せずに行われることがない。これにより、ミキサ車１の走行中のミキサドラム２の誤操作が確実に防止される。さらに、ロック解除操作は、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａを排出位置に合わせることがないため、ロック解除操作後にミキサドラム２が排出方向に回転され、生コンが排出されるということが防止される。なお、ロック解除操作は、前述したものに限らない。 Further, the operation panel 40 has potentiometers 41a, 42a, 43a, 44a as dials for controlling the rotation of the mixer drum 2. The controller 20 determines that the unlock operation has been performed when the potentiometers 41a, 42a, 43a, 44a reciprocate in a predetermined section between the neutral position and the maximum input position, and determines that the unlock operation has been performed, and the mixer drum 2 by the operation panel 40 Control so that the operation of is possible. For example, the controller 20 has a position where any one of the potentiometers 41a, 42a, 43a, 44a is 10% when the rotation speed of the mixer drum 2 at the loading position is 100% when the maximum loading position is 100%, and the mixer drum 2 at the loading position. When the operation of reciprocating between the position where the rotation speed of is 95% when the maximum input position is set to 100% and the position is performed, it is determined that the unlock operation has been performed. Here, normally, while the mixer truck 1 is running, the ready-mixed concrete is not charged into the mixer drum 2, so that the potentiometers 41a, 42a, 43a, 44a are not adjusted to the charging positions. Therefore, the unlocking operation is not performed unintentionally because it includes an operation that is not normally performed while the mixer truck 1 is running, in which the potentiometers 41a, 42a, 43a, 44a are adjusted to the insertion positions. As a result, erroneous operation of the mixer drum 2 while the mixer truck 1 is running is reliably prevented. Further, since the unlocking operation does not align the potentiometers 41a, 42a, 43a, 44a with the ejection positions, it is possible to prevent the mixer drum 2 from being rotated in the ejection direction after the unlocking operation and ejecting the ready-mixed concrete. The unlocking operation is not limited to the one described above.
　また、ステップＳ１０５においては操作盤４０にミキサドラム２の操作権利を与えずに、ステップＳ１０６において操作盤４０によりロック解除操作がされると、ステップＳ１０８において操作盤４０にミキサドラム２の操作権利を与え、操作盤４０によるミキサドラム２の操作を可能としてもよい。 Further, when the unlocking operation is performed by the operation panel 40 in step S106 without giving the operation panel 40 the operation right of the mixer drum 2 in step S105, the operation panel 40 is given the operation right of the mixer drum 2 in step S108. The mixer drum 2 may be operated by the operation panel 40.
　また、ステップＳ１０２及びステップＳ１０５においては、操作盤４０のいずれかのみ、例えば、運転室１１内に設けられる第１操作盤４１のみにミキサドラム２の操作権利を与え、ステップＳ１０６において当該操作盤によりロック解除操作がされると、ステップＳ１０８において当該操作盤によるミキサドラム２の操作を可能としてもよい。 Further, in step S102 and step S105, the operation right of the mixer drum 2 is given to only one of the operation panels 40, for example, only the first operation panel 41 provided in the driver's cab 11, and the mixer drum 2 is locked by the operation panel in step S106. When the release operation is performed, the mixer drum 2 may be operated by the operation panel in step S108.
　また、ステップＳ１０１において、ミキサ車１が停車状態である場合は、ステップＳ１０２ではなく、ステップＳ１０５へと進んでもよい。つまり、停車状態であっても、走行状態である場合（ステップＳ１０５、Ｓ１０６，Ｓ１０８）と同様に、操作盤４０にミキサドラム２の操作権利を与えた状態でロック解除操作がされると、操作盤４０によるミキサドラム２の操作を可能となるように制御してもよい。言い換えれば、コントローラ２０は、ミキサ車１が停車状態では、操作盤４０を用いてロック解除操作がされることで、操作盤４０によるミキサドラム２の操作が可能となるように制御し、ミキサ車１が走行状態におけるロック解除操作とミキサ車１が停車状態におけるロック解除操作は同一である構成であってもよい。ミキサ車１が走行状態である場合に行われるロック解除操作が第一ロック解除操作に該当し、ミキサ車１が停車状態である場合に行われるロック解除操作が第二ロック解除操作に該当する。ミキサ車１は、通常では、停車状態で搭載物の投入や排出が行われる。しかしながら、状況によっては、走行状態で搭載物の排出が行われる。走行状態での搭載物の排出は、通常の作業ではないため、行われる頻度は少ない。つまり、停車状態における搭載物の投入や排出等をするために行われる第二ロック解除操作は、走行状態における搭載物の排出をするために行われる第一ロック解除操作よりも高い頻度で行われる。この構成では、言い換えれば、第二ロック解除操作が、第二ロック解除操作よりも低い頻度で行われる第一ロック解除操作に適用される。これにより、ミキサドラム２の誤操作が防止されるとともに、ミキサ車１が走行状態におけるロック解除操作が停車状態におけるロック解除操作と同一であるため、作業者が混乱せず、ロック解除操作が煩雑化しないため、操作盤４０によるミキサドラム２の操作がしやすくなる。なお、ミキサ車１が停車状態におけるロック解除操作と走行状態におけるロック解除操作は、異なっていてもよい。 Further, if the mixer truck 1 is stopped in step S101, the process may proceed to step S105 instead of step S102. That is, even if the vehicle is stopped, when the unlock operation is performed with the operation panel 40 given the operation right of the mixer drum 2, as in the case of the traveling state (steps S105, S106, S108), the operation panel is operated. It may be controlled so that the mixer drum 2 can be operated by 40. In other words, the controller 20 controls the mixer truck 1 so that the mixer truck 1 can be operated by the operation panel 40 by performing the unlocking operation using the operation panel 40 when the mixer truck 1 is stopped. The unlocking operation when the mixer truck 1 is stopped may be the same as the unlocking operation when the mixer truck 1 is stopped. The unlocking operation performed when the mixer truck 1 is in the traveling state corresponds to the first unlocking operation, and the unlocking operation performed when the mixer truck 1 is in the stopped state corresponds to the second unlocking operation. Normally, the mixer truck 1 is loaded and unloaded with loads in a stopped state. However, depending on the situation, the load may be discharged while the vehicle is running. Discharging the load while driving is not a normal task, so it is rarely done. That is, the second unlock operation performed for loading and unloading the load in the stopped state is performed more frequently than the first unlock operation performed for discharging the load in the running state. .. In this configuration, in other words, the second unlock operation is applied to the first unlock operation that is performed less frequently than the second unlock operation. As a result, erroneous operation of the mixer drum 2 is prevented, and since the unlocking operation in the running state of the mixer truck 1 is the same as the unlocking operation in the stopped state, the operator is not confused and the unlocking operation is not complicated. Therefore, the mixer drum 2 can be easily operated by the operation panel 40. The unlocking operation when the mixer truck 1 is stopped and the unlocking operation when the mixer truck 1 is running may be different.
　また、コントローラ２０は、ステップＳ１０１において、パーキングブレーキスイッチ２２からの信号がパーキングブレーキ１２の作動を示し、かつ、車速が０より大きいという通常では生じえない状態、言い換えれば、車速が示す状態（ミキサ車１は走行中）とパーキングブレーキスイッチ２２からの信号が示す状態（ミキサ車１は停車中）とに矛盾が生じるような状態では、パーキングブレーキスイッチ２２からの信号の異常を検知する。この状態では、車速が０より大きいという情報に基づいて、ミキサ車１が走行状態であると判定する。そのため、パーキングブレーキスイッチ２２からの信号に異常が発生した場合であっても、ミキサ車１の走行中に操作盤４０を用いてロック解除操作を行うことで、ミキサドラム２を操作盤４０の操作に応じて駆動することができる。 Further, in step S101, the controller 20 indicates a state in which the signal from the parking brake switch 22 indicates the operation of the parking brake 12 and the vehicle speed is greater than 0, which cannot normally occur, in other words, the state indicated by the vehicle speed (mixer). In a state where there is a discrepancy between the state in which the vehicle 1 is running) and the state indicated by the signal from the parking brake switch 22 (the mixer vehicle 1 is stopped), an abnormality in the signal from the parking brake switch 22 is detected. In this state, it is determined that the mixer truck 1 is in the traveling state based on the information that the vehicle speed is greater than 0. Therefore, even if an abnormality occurs in the signal from the parking brake switch 22, the mixer drum 2 can be operated by operating the operation panel 40 by performing the unlock operation using the operation panel 40 while the mixer truck 1 is running. Can be driven accordingly.
　次に、上記実施形態の変形例について説明する。 Next, a modified example of the above embodiment will be described.
　上記実施形態では、コントローラ２０は、パーキングブレーキスイッチ２２により入力されるパーキング信号と、車速センサ２１により入力される車速と、からミキサ車１の走行状態を判定する。車速は、車速センサ２１により入力されるものに限定されず、ＧＰＳの位置情報、加速度センサ、ドライブレコーダー等が撮影した画像等に基づいて演算し、コントローラ２０に入力されてもよい。また、コントローラ２０は、車速を使わず、パーキング信号のみからミキサ車１の走行状態を判定してもよい。 In the above embodiment, the controller 20 determines the traveling state of the mixer truck 1 from the parking signal input by the parking brake switch 22 and the vehicle speed input by the vehicle speed sensor 21. The vehicle speed is not limited to that input by the vehicle speed sensor 21, and may be calculated based on GPS position information, an acceleration sensor, an image taken by a drive recorder, or the like, and input to the controller 20. Further, the controller 20 may determine the traveling state of the mixer truck 1 only from the parking signal without using the vehicle speed.
　上記実施形態では、操作盤４０は操作盤４１～４４を有する。操作盤４０の有する操作盤の数はこれに限定されず、１つのみを有しても、４つ以上有してもよい。 In the above embodiment, the operation panel 40 has operation panels 41 to 44. The number of operation panels included in the operation panel 40 is not limited to this, and the operation panel 40 may have only one or four or more.
　以上のように構成された本発明の実施形態の構成、作用、および効果をまとめて説明する。 The configuration, operation, and effect of the embodiment of the present invention configured as described above will be collectively described.
　ミキサ車１は、車両上に回転自在に搭載されたミキサドラム２と、ミキサドラム２を手動で操作するための操作盤４０と、ミキサドラム２の駆動を制御するコントローラ２０と、を備え、コントローラ２０は、ミキサ車１が走行状態では、操作盤４０を用いて第一ロック解除操作がされると操作盤４０によるミキサドラム２の操作が可能となるように制御し、操作盤４０を用いて第一ロック解除操作がされる前では操作盤４０が操作されても当該操作に応じたミキサドラム２の駆動を行わない。 The mixer truck 1 includes a mixer drum 2 rotatably mounted on the vehicle, an operation panel 40 for manually operating the mixer drum 2, and a controller 20 for controlling the drive of the mixer drum 2. The controller 20 includes a controller 20. When the mixer truck 1 is in a running state, when the first lock release operation is performed using the operation panel 40, the mixer drum 2 is controlled so that the operation panel 40 can be operated, and the first lock release operation is performed using the operation panel 40. Before the operation, even if the operation panel 40 is operated, the mixer drum 2 is not driven according to the operation.
　この構成では、コントローラ２０は、ミキサ車１が走行状態では第一ロック解除操作がされるまでは操作盤４０によるミキサドラム２の操作を受け付けないため、誤って操作盤４０に接触してもミキサドラム２が操作されることがない。 In this configuration, the controller 20 does not accept the operation of the mixer drum 2 by the operation panel 40 until the first lock release operation is performed while the mixer truck 1 is running. Therefore, even if the mixer truck 1 accidentally touches the operation panel 40, the mixer drum 2 is not accepted. Is never manipulated.
　コントローラ２０は、ミキサ車１が走行状態では自動でミキサドラム２を投入方向に回転させ搭載物の撹拌を行う自動撹拌を行い、自動撹拌が行われている状態では操作盤４０にミキサドラム２の操作権利を付与せず、自動撹拌を解除するための自動撹拌解除スイッチ４１ｃがオンにされてから第一ロック解除操作がされるまでの間が所定時間以内であると操作盤４０によるミキサドラム２の操作が可能となるように制御する。 The controller 20 automatically rotates the mixer drum 2 in the loading direction when the mixer wheel 1 is running to perform automatic stirring to stir the loaded object, and when the mixer wheel 1 is in a running state, the operation panel 40 has the right to operate the mixer drum 2. If the period from when the automatic stirring release switch 41c for releasing the automatic stirring to the first lock release operation is within a predetermined time is within a predetermined time, the mixer drum 2 is operated by the operation panel 40. Control to be possible.
　この構成では、自動撹拌解除スイッチ４１ｃがオンにされてから所定の時間が経過すると、第一ロック解除操作を行っても操作盤４０によるミキサドラム２の操作が不能となり、ミキサドラム２が意図せずに操作されることがない。 In this configuration, when a predetermined time elapses after the automatic stirring release switch 41c is turned on, the mixer drum 2 cannot be operated by the operation panel 40 even if the first lock release operation is performed, and the mixer drum 2 unintentionally becomes inoperable. It will not be operated.
　操作盤４０は、ミキサドラム２の回転を制御するポテンショメータ４１ａ，４２ａ，４３ａ，４４ａを有し、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａは、ミキサドラム２が投入方向に回転する投入位置と、ミキサドラム２が排出方向に回転する排出位置と、投入位置と排出位置との間に位置しミキサドラム２の回転が停止する中立位置と、投入位置の中でミキサドラム２の回転速度が最大となる最大投入位置と、を有し、コントローラ２０は、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａが中立位置と最大投入位置との間の所定の区間を往復する操作がされると、第一ロック解除操作がされたと判定する。 The operation panel 40 has potentiometers 41a, 42a, 43a, 44a that control the rotation of the mixer drum 2, and the potentiometers 41a, 42a, 43a, 44a have a charging position at which the mixer drum 2 rotates in the charging direction and a discharger from the mixer drum 2. A discharge position that rotates in the direction, a neutral position that is located between the loading position and the discharging position and where the rotation of the mixer drum 2 stops, and a maximum loading position that maximizes the rotation speed of the mixer drum 2 in the loading position. The controller 20 determines that the first unlock operation has been performed when the potentiometers 41a, 42a, 43a, 44a reciprocate in a predetermined section between the neutral position and the maximum input position.
　この構成では、第一ロック解除操作は、ポテンショメータ４１ａ，４２ａ，４３ａ，４４ａを投入位置へ向けて回転させるというミキサ車の走行中には通常行われない操作を含むため、意図せずに行われることがない。 In this configuration, the first unlock operation is unintentionally performed because it includes an operation of rotating the potentiometers 41a, 42a, 43a, 44a toward the loading position, which is not normally performed while the mixer truck is running. Never.
　コントローラ２０は、ミキサ車１が停車状態では、操作盤４０を用いて第二ロック解除操作がされることで、操作盤４０によるミキサドラム２の操作が可能となるように制御し、第一ロック解除操作と第二ロック解除操作は同一である。 When the mixer truck 1 is stopped, the controller 20 controls so that the mixer drum 2 can be operated by the operation panel 40 by performing the second unlock operation using the operation panel 40, and the first unlock is released. The operation and the second unlock operation are the same.
　この構成では、ミキサ車１が走行状態の際の第一ロック解除操作とミキサ車１が停車状態の際の第二ロック解除操作は同一である。停車状態における搭載物の投入や排出等をするために行われる第二ロック解除操作は、走行状態における搭載物の排出をするために行われる第一ロック解除操作よりも高い頻度で行われる。この構成では、言い換えれば、第二ロック解除操作が、第二ロック解除操作よりも低い頻度で行われる第一ロック解除操作に適用される。これにより、ミキサドラム２の誤操作が防止されるとともに、操作盤４０によるミキサドラム２の操作がしやすくなる。 In this configuration, the first unlock operation when the mixer truck 1 is in the running state and the second unlock operation when the mixer truck 1 is in the stopped state are the same. The second unlock operation performed for loading and unloading the load in the stopped state is performed more frequently than the first unlock operation performed for ejecting the load in the running state. In this configuration, in other words, the second unlock operation is applied to the first unlock operation that is performed less frequently than the second unlock operation. This prevents erroneous operation of the mixer drum 2 and facilitates operation of the mixer drum 2 by the operation panel 40.
　以上、本発明の実施形態について説明したが、上記実施形態は本発明の適用例の一部を示したに過ぎず、本発明の技術的範囲を上記実施形態の具体的構成に限定する趣旨ではない。 Although the embodiments of the present invention have been described above, the above embodiments are only a part of the application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiments. No.
　本願は２０２０年７月２９日に日本国特許庁に出願された特願２０２０－１２７９６７に基づく優先権を主張し、この出願の全ての内容は参照により本明細書に組み込まれる。 This application claims priority based on Japanese Patent Application No. 2020-129967 filed with the Japan Patent Office on July 29, 2020, and the entire contents of this application are incorporated herein by reference.

Claims (4)

  1. 　ミキサ車であって、
    　車両上に回転自在に搭載されたミキサドラムと、
    　前記ミキサドラムを手動で操作するための操作盤と、
    　前記ミキサドラムの駆動を制御するミキサドラム制御装置と、を備え、
    　前記ミキサドラム制御装置は、
    　前記ミキサ車が走行状態では、前記操作盤を用いて第一ロック解除操作がされると前記操作盤による前記ミキサドラムの操作が可能となるように制御し、前記操作盤を用いて前記第一ロック解除操作がされる前では前記操作盤が操作されても当該操作に応じた前記ミキサドラムの駆動を行わないミキサ車。     It ’s a mixer truck,
    A mixer drum that is rotatably mounted on the vehicle,
    An operation panel for manually operating the mixer drum,
    A mixer drum control device for controlling the drive of the mixer drum is provided.
    The mixer drum control device is
    When the mixer truck is in a running state, when the first lock release operation is performed using the operation panel, it is controlled so that the mixer drum can be operated by the operation panel, and the first lock is performed using the operation panel. A mixer truck that does not drive the mixer drum in response to the operation even if the operation panel is operated before the release operation is performed.
  2. 　請求項１に記載のミキサ車であって、
    　前記ミキサドラム制御装置は、前記ミキサ車が走行状態では自動で前記ミキサドラムを投入方向に回転させ搭載物の撹拌を行う自動撹拌を行い、前記自動撹拌が行われている状態では前記操作盤に前記ミキサドラムの操作権利を付与せず、前記自動撹拌を解除するための自動撹拌解除スイッチがオンにされてから前記第一ロック解除操作がされるまでの間が所定時間以内であると前記操作盤による前記ミキサドラムの操作が可能となるように制御するミキサ車。     The mixer truck according to claim 1.
    The mixer drum control device automatically rotates the mixer drum in the loading direction when the mixer truck is running to perform automatic stirring for stirring the load, and when the automatic stirring is performed, the mixer drum is mounted on the operation panel. According to the operation panel, the period from when the automatic stirring release switch for releasing the automatic stirring is turned on to when the first lock release operation is performed is within a predetermined time without granting the operation right of the above. A mixer truck that controls the mixer drum so that it can be operated.
  3. 　請求項１または２に記載のミキサ車であって、
    　前記操作盤は、前記ミキサドラムの回転を制御するダイヤルを有し、
    　前記ダイヤルは、
    　前記ミキサドラムを投入方向に回転させる投入位置と、
    　前記ミキサドラムを排出方向に回転させる排出位置と、
    　前記投入位置と前記排出位置との間に位置し前記ミキサドラムの回転を停止させる中立位置と、
    　前記投入位置の中で前記ミキサドラムの回転速度が最大となる最大投入位置と、を有し、
    　前記ミキサドラム制御装置は、前記ダイヤルが前記中立位置と前記最大投入位置との間の所定の区間を往復する操作がされると、前記第一ロック解除操作がされたと判定するミキサ車。     The mixer truck according to claim 1 or 2.
    The operation panel has a dial for controlling the rotation of the mixer drum.
    The dial is
    The loading position for rotating the mixer drum in the loading direction and
    The discharge position for rotating the mixer drum in the discharge direction and
    A neutral position located between the loading position and the discharging position to stop the rotation of the mixer drum, and a neutral position.
    It has a maximum loading position where the rotation speed of the mixer drum is maximum among the loading positions.
    The mixer truck is a mixer truck that determines that the first unlock operation has been performed when the dial is operated to reciprocate a predetermined section between the neutral position and the maximum closing position.
  4. 　請求項１から３のいずれか一つに記載のミキサ車であって、
    　前記ミキサドラム制御装置は、前記ミキサ車が停車状態では、前記操作盤を用いて第二ロック解除操作がされることで、前記操作盤による前記ミキサドラムの操作が可能となるように制御し、
    　前記第一ロック解除操作と前記第二ロック解除操作は同一であるミキサ車。     The mixer truck according to any one of claims 1 to 3.
    The mixer drum control device controls so that when the mixer truck is stopped, the second lock release operation is performed using the operation panel so that the mixer drum can be operated by the operation panel.
    The mixer truck in which the first unlock operation and the second unlock operation are the same.
PCT/JP2021/015194 2020-07-29 2021-04-12 Concrete mixer truck WO2022024463A1 (en)

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JP2020-127967 2020-07-29

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006188133A (en) * 2005-01-05 2006-07-20 Kayaba Ind Co Ltd Drum operating apparatus
JP2010228152A (en) * 2009-03-26 2010-10-14 Kayaba Ind Co Ltd Concrete mixer truck
JP2020066292A (en) * 2018-10-23 2020-04-30 新明和工業株式会社 Truck mixer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006188133A (en) * 2005-01-05 2006-07-20 Kayaba Ind Co Ltd Drum operating apparatus
JP2010228152A (en) * 2009-03-26 2010-10-14 Kayaba Ind Co Ltd Concrete mixer truck
JP2020066292A (en) * 2018-10-23 2020-04-30 新明和工業株式会社 Truck mixer

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