JP6700021B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle, in particular, a work vehicle equipped with a work machine mounted on a vehicle body, a hydraulic actuator that drives the work machine, and a hydraulic pump that can supply hydraulic oil to the hydraulic actuator.

  In the above vehicle, a hydraulic pump that can be driven by either an engine or an electric motor is conventionally known as disclosed in, for example, Patent Document 1.

Japanese Utility Model Publication No. 55-51625

  In the above-described conventional work vehicle, when the hydraulic pump is driven by the electric motor to perform the work, the remaining capacity of the battery is excessively reduced (so-called battery exhaustion) to normally operate the electric motor. May not be possible. In this case, the discharge amount of the hydraulic pump may be reduced or the hydraulic pump may be stopped, causing the work machine to perform an unexpected operation.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a work vehicle capable of solving the above problems with a simple structure.

In order to achieve the above object, the present invention provides a working machine mounted on a vehicle body, a hydraulic actuator for driving the working machine, a hydraulic oil that can be supplied to the hydraulic actuator, and electric power from an engine and a battery. A hydraulic pump that can be driven by any of the electric motors that operate in the above, and a connection state in which power can be selectively taken from the engine and the electric motor and transmitted to the hydraulic pump, and a disconnection state that cuts off the transmission of the power can be switched. A power selection and extraction mechanism, and a control device capable of switching the engine, the electric motor, and the power selection and extraction mechanism to an engine driving state in which the hydraulic pump is driven by the engine and a motor driving state in which the hydraulic pump is driven by the electric motor. To a power source selection switch for selectively operating the drive state of the hydraulic pump to the engine drive state or the motor drive state, a work selection switch for arbitrarily selecting the operation mode of the hydraulic actuator, and the work selection switch At least a valve device for controlling the transfer of hydraulic oil between the hydraulic pump and the hydraulic actuator to control the operation of the hydraulic actuator according to the operation input of the hydraulic pump. Is configured so that it can be in a valve operating state that allows the supply of hydraulic oil to the hydraulic pump and a neutral state in which the hydraulic pump and the hydraulic actuator are shut off to hydraulically lock the hydraulic actuator. When an operation input to the selection switch is input to the control device, a valve operation signal is output to the valve device so that the valve device is in the valve operation state corresponding to the operation input, and the operation input is controlled. When not input to the device, the valve device stops outputting the valve operation signal so that the valve device is in the neutral state, and further, the control device is in the motor drive state and the remaining capacity of the battery is reduced to a predetermined value or less. In this case, the first feature is that an input prohibiting means for prohibiting the input of the operation input to the control device is attached .

  According to the present invention, in addition to the first feature, the input prohibiting unit serves as an input unit to the control device for a control signal output from the operation device in response to an operation input to the work selection switch. The common terminal block includes a terminal block, and the common terminal block has a common terminal that is independent from the input path of the control signal, and corresponds to the operation input when a predetermined voltage is applied to the common terminal from the control device. Although the control signal is allowed to be input to the control device, the control signal is configured not to be input to the control device when the predetermined voltage is not applied to the common terminal thereof. When the motor is in the driving state, normally, the predetermined voltage is applied to the common terminal, and when the remaining capacity of the battery drops below a predetermined value, the application of the predetermined voltage to the common terminal is stopped. Is the second feature.

As described above, according to the present invention, the valve device can be in the valve operating state in which the hydraulic oil is supplied from the hydraulic pump to the hydraulic actuator and the neutral state in which the hydraulic pump and the hydraulic actuator are shut off. When the operation input to the work selection switch is input to the control device, the control device outputs a valve operation signal to the valve device so that the valve device is in a valve operation state corresponding to the operation input, Further, when the operation input is not input to the control device, the output of the valve operation signal is stopped so that the valve device is in a neutral state, and the control device further indicates that the remaining capacity of the battery is a predetermined value when the hydraulic pump motor is driven. Since the input prohibiting means for prohibiting the input of the operation input to the control device is attached when the voltage drops below, the remaining capacity of the battery is reduced when the hydraulic pump is driven by the electric motor to perform the work. When the value is excessively reduced, the input prohibiting means prohibits the input of the operation input to the control device, whereby the valve device is automatically returned to the neutral state, and the working machine can be emergency stopped. Thus, with a simple structure in which the above-mentioned input prohibiting means is simply added to the control device, it is possible to effectively prevent the working machine from performing an unexpected operation due to a dead battery.

  According to the second feature, in particular, the input prohibiting means includes a common terminal block that serves as an input section to the control device of a control signal output from the operating device in response to an operation input to the work selection switch. The common terminal block has a common terminal independent of the input path of the control signal, and when a predetermined voltage is applied to the common terminal from the control device, the common terminal block is connected to the control device of the control signal corresponding to the operation input. Is allowed, but the control signal is not input to the control device when the predetermined voltage is not applied to its common terminal.The control device normally operates when the hydraulic pump is in the motor drive state. The predetermined voltage is applied to the common terminal, but the application of the predetermined voltage to the common terminal is stopped when the remaining capacity of the battery drops below a predetermined value. It has a simple configuration that includes a single common terminal block and a signal line that normally applies a predetermined voltage from the control device to the common terminal of that terminal block and does not apply it when the remaining battery capacity is low, greatly contributing to cost savings. can do.

Overall side view showing an embodiment of a vehicle for loading and unloading bodies according to the present invention Overall plan view of the vehicle for loading and unloading the body (view from arrow 2 in FIG. 1) Schematic of the power transmission system in the vehicle for loading and unloading the body Control block diagram of the embodiment Side view of the main part of the body slide mechanism of the vehicle for loading and unloading the body (enlarged sectional view taken along line 5-5 of FIG. 2) The principal part top view of the said body slide mechanism (6 arrow line view of FIG. 5) 6 is an enlarged sectional view taken along line 7-7 of FIG. Sectional view taken along line 8-8 of FIG. Rear view of the main part of the body front plate of the vehicle for loading and unloading the body (view from arrow 9 in FIG. 1) Front view showing an example of a remote control A circuit diagram showing an example of a hydraulic circuit of the body loading/unloading vehicle. Body loading and unloading process chart from the time when the body of the vehicle for loading and unloading the vehicle to the ground contact Body loading/unloading process diagram of the body of the vehicle for loading/unloading the vehicle from the secondary slide position to complete ground contact

  Embodiments of the present invention will be specifically described below based on the embodiments of the present invention illustrated in the accompanying drawings.

  First, FIGS. 1 and 2 show an example of a body loading/unloading vehicle V as a working vehicle, which is mounted on a base vehicle Vb and a main frame F of the base vehicle Vb after completion of assembly. It is composed of a body K for loading and unloading bodies. Front wheels and rear wheels W are suspended on the main frame F of the base vehicle Vb.

  Referring also to FIGS. 3 and 4, the base vehicle Vb has a vehicle-side control device UV having a microcomputer as a main part, and the body K has a body also having a microcomputer as a main part. Side control devices UK are provided respectively, and both control devices UV and UK cooperate with each other to form a control device U.

  An engine E capable of applying a driving force to wheels W, a battery BA, and an electric motor M which is connected to the battery BA via an inverter 12 and operates by electric power from the battery BA are mounted on a main frame F of the base vehicle Vb. And a power selection and extraction mechanism PS capable of selectively extracting the power of the engine E or the electric motor M from a wheel drive system D as a drive system including the engine E and the electric motor M, the engine E, the electric motor M, and At least a vehicle side control device UV capable of controlling the power selective take-out mechanism PS in cooperation with the bodywork side control device UK is mounted.

  The wheel drive system D is constructed by connecting wheels, that is, rear wheels W, to the output side of the engine E via the transmission 10, and connects the input side of the transmission 10 and the output side of the engine E. A clutch 11 such as an electromagnetic clutch for connecting and disconnecting the clutch 11 is provided therebetween, and a motor shaft (not shown) of the electric motor M is interposed in series between the clutch 11 and the transmission 10. ..

  Then, when the vehicle-side control device UV causes the electric motor M to be de-energized and the motor shaft to idle while the electromagnetic clutch 11 is connected, the output of the engine E passes through the clutch 11, the motor shaft, and the transmission 10. Since the power is transmitted to the wheel W side, the wheel W can be driven to travel by the engine E. On the other hand, if the electric motor M is energized from the battery BA while the clutch 11 is disengaged, the output of the electric motor M is transmitted to the wheel W side through the transmission 10, so the wheel W is driven by the electric motor M. can do. In this way, the body loading/unloading vehicle V is a hybrid work vehicle that can drive the wheels W to travel, using either the engine E or the electric motor M as a power source.

  When the wheel W is being driven by the engine E or is being decelerated, the electric motor M can generate an electromotive force due to the idle rotation of the motor shaft, so that the battery BA can be charged with the electromotive force. is there. The electric motor M may also be used as a generator as described above, or a dedicated charging generator (not shown) driven by the engine E may be provided separately from the electric motor M to generate electric power. The battery BA may be charged with the electric power generated by the machine.

  The engine E, the electric motor M, the battery BA, and the clutch 11 are connected to the vehicle side control device UV, and the starter switch ES-SW for starting the engine E is also connected to the vehicle side control device UV.

  In the battery BA shown in the control block diagram of FIG. 4, a battery sensor including a voltmeter and an ammeter for detecting the state of the battery BA, and power supply/charging between the battery BA and the electric motor M are provided on the vehicle side. A charging/charging circuit unit for controlling based on a control signal from the control device UV is included, and those sensors and charging/charging circuit unit are connected to the vehicle-side control device UV, and in particular, a battery sensor for detecting the remaining battery level is provided. , And is also connected to the bodywork side control device UK (a second control device UK2 described later).

  Further, the engine E shown in the control block diagram of FIG. 4 includes sensors for detecting the states of various parts of the engine, other battery mounted on the vehicle, and an electric load part of the engine (for example, a spark plug, a starter motor, a generator, etc.). The power supply/charge circuit section for controlling the power supply/charge between the vehicle side control apparatus UV and the vehicle side control apparatus UV is included. The engine side sensor and the charge/charge circuit section are included in the vehicle side control apparatus UV. Connected. Further, among the sensors provided in the engine E, a sensor that detects that the engine is in operation and outputs an engine operating signal is also connected to the bodywork side control device UK.

  Thus, the vehicle-side control device UV, the engine E, the electric motor M, and the battery BA are actually connected to each other by a plurality of power lines and/or signal lines. It is shown in simplified form with some parts omitted.

  The transmission 10 is additionally provided with a power take-off device PTO capable of taking out the output of the transmission at any time. Since the structure of such a power take-out device is well known in the art, description of the structure will be omitted. The output side of the power take-off device PTO is interlocked with and connected to a hydraulic pump P which will be described later, which is a part of the body K.

  Further, the power takeoff device PTO is connected to the vehicle side control device UV, and the output of the transmission 10 (that is, the speed change gear) according to an operation input to the power takeoff switch P-SW also connected to the vehicle side control device UV. Power from the power sources E and M on the machine upstream side can be selectively transmitted to the wheel W side and the hydraulic pump P side. That is, when the power take-out switch P-SW is turned on, the vehicle-side control device UV causes the power take-off device PTO to respond to the operation signal being output to the vehicle-side control device UV. A signal instructing the power connection state to the P side is output, whereby the output of the transmission 10 is transmitted to the hydraulic pump P side and the pump can be driven. On the other hand, when the power take-out switch P-SW is turned off, the vehicle side control device UV is transmitted to the power take-out device PTO in response to the operation signal from the power take-out switch P-SW being stopped. On the other hand, a signal for instructing the hydraulic pump P side to shut off the power is output, so that the output of the transmission 10 is transmitted to the wheel W side and the vehicle can be driven.

  When the power take-off device PTO is in a power connection state that actually enables power transmission from the power sources E and M to the hydraulic pump P side, the state is checked by the bodywork-side control device UK. The power takeoff signal is output from the vehicle side control device UV to the bodywork side control device UK (second control device UK2 described later), and the power takeoff device PTO outputs the power takeoff signal to the power source E, It is stopped in response to switching to a power cutoff state that cuts off power transmission from M to the hydraulic pump P side.

  The clutch 11 and the power take-off device PTO cooperate with each other to form the power selective take-out mechanism PS.

  In the wheel drive system D of the present embodiment, the engine E and the electric motor M are arranged in series with each other, but in the present invention, the electric motor M and the engine E are connected in parallel with each other on the transmission 10 side. May be.

  Next, the specific structure of the body K will be described with reference to FIGS. The body K has a subframe 2 having a rectangular frame shape in plan view, which is mounted and fixed on a main frame F as a vehicle body of the base vehicle Vb. A lift frame FL is mounted on the sub-frame 2 so as to be tiltable rearward and is pivotally supported, and a body B is mounted on the lift frame FL so as to be slidable back and forth.

  The body B is integrally provided on a front end of the load receiving base Bm, which is a flat plate having a rectangular shape in plan view so that an object to be transported, for example, a broken vehicle V', can be loaded on the upper surface. And a front plate Bf that extends in the vehicle width direction. The cargo receiving base Bm is formed wider than the main frame F and the sub frame 2 and long in the front-rear direction.

  Reinforcing ribs Bmc extending in the vertical and horizontal directions are integrally provided on the lower surface of the load receiving base Bm so as to give it necessary rigidity, and a pair of side plates Bms are integrally formed on the left and right edges of the load receiving base Bm. Is installed vertically. The side plate Bms may extend above the upper surface of the load receiving base Bm to function as a stopper for preventing the transported object from falling.

  At the rear end of the main frame F, a pair of guide wheels 3 for rollingly guiding the lift frame FL in the front-rear direction are rotatably supported around a horizontal axis. Further, at the rear end of the main frame F, an outrigger 4 that stably holds the main frame F is provided so as to be able to project during the loading and unloading work of the body B loaded with a troubled vehicle as an object to be transported.

  The lift frame FL is formed to be narrower than the main frame F and the sub-frame 2, and has a pair of vertical girders 6 made of channel materials extending in parallel to each other in the front-rear direction, and between the vertical girders 6. And a cross girder 7 for connecting the two. The rear portion of the lift frame FL is mounted on the pair of guide wheels 3 so as to be slidable back and forth, and the rear end portion is extended rearward longer than the vehicle body frame FS.

  Tilt means 8 is connected between the front-rear intermediate portion of the lift frame FL and the front-rear intermediate portion of the sub-frame 2. The tilt means 8 has a conventionally known structure, and includes a lift link 9 that is pin-connected p1 and p2 between the subframe 2 and the lift frame FL, and an intermediate portion of the lift link 9 and the subframe 2. The lift frame FL can be tilted rearward and upward by the extension operation of the first hydraulic actuator A1 composed of hydraulic cylinders pin-connected p3 and p4.

  The lift frame FL is provided with a connecting means J for connecting the body B in a detachable manner and a transfer means T for forcibly transferring the connecting means J back and forth.

As shown in FIGS. 5 to 8, the connecting means J is provided with a traveling frame 15 on which two sets of left and right rolling wheels 16 are mounted, and a locking piece 17 which is erected and fixed to the traveling frame 15. A hook 17 ₁ that opens upward is formed on the locking piece 17. The left and right rolling wheels 16 of the connecting means J are rotatably mounted on the lift frame FL, and even if the chain 23 of the transfer means T, which will be described later, is loosened, the connecting means J is placed on the lift frame FL without any problem. Can be transported along.

  The transfer means T is fixed to a drive sprocket 20 fixed to a drive shaft 19 rotatably mounted on the front end of the lift frame FL, and a driven shaft 21 rotatably mounted on the rear end of the lift frame FL. The driven sprocket 22 includes a chain 23 as an endless conveyor suspended by the sprockets 20 and 22, and a second hydraulic actuator A2 including a hydraulic motor that is interlocked with the drive shaft 19. The lower end of the locking piece 17 of the connecting means J is bonded to the upper side of the endless chain 23. Therefore, if the second hydraulic actuator A2 is rotationally driven, the transfer means T can be driven, and the connecting means J connected thereto can be forcibly driven back and forth along the lift frame FL.

  As shown in FIGS. 5 and 6, support shafts 26 are supported on the left and right rear ends of the lift frame FL in a cantilevered manner toward the outside, and rolling wheels 27 are supported on these support shafts 26. It is rotatably supported. A body B described later (a reinforcing rib Bmc on the lower surface of the body B that extends in the front-rear direction in the present embodiment) supported on the lift frame FL can move back and forth on the guide wheels 27.

An engaging pin 32 which is engageable with and disengageable from the hook 17 ₁ of the connecting means J is attached to the body B at the center of the front edge thereof via the bracket 33, whereby the body B connects the connecting means J. It is engaged with and disengaged from the transfer means T via the transfer means T, and in its locked state, the body B can be driven back and forth on the lift frame FL. Further, on the body B, a pair of left and right ground wheels 34 are rotatably supported on the left and right edges of the rear edge. The body B may be configured so as not to come off while being connected to the transfer means T.

  Further, as shown in FIG. 1, the body B and the lift frame FL are provided with an engagement/disengagement mechanism EK for engaging/disengaging them. The engagement/disengagement mechanism EK includes a male piece 35 provided on the body B and a female piece 36 provided on the lift frame FL corresponding to the male piece 35. As shown in FIGS. When returned to the running position, the male piece 35 engages with the female piece 36 to secure the body B on the lift frame FL, and when the body B slides backward, the engagement is released.

  As shown in FIGS. 12 and 13, the body loading/unloading vehicle V controls the loading/unloading of the body B between the vehicle body F and the ground (more specifically, the tilt control of the lift frame FL or the lift frame of the body B). A plurality of first to fifth proximity switches S1 to S5 used to control the slide movement back and forth on the FL) are provided. That is, between the front end of the lift frame FL and the front end of the body B, the first proximity switch S1 (see FIG. 12A) that detects the slide amount of the body B is “0”, and the body frame F and the lift frame FL are also included. A second proximity switch S2 (see FIG. 12A) that detects the tilt angle “0” of the lift frame FL is provided between the two, and a primary slide amount of the body B between the body B and the lift frame FL ( A third proximity switch S3 (see FIG. 12B) for detecting about 1,900 mm) and a first proximity switch S3 for detecting the primary tilt angle (about 12°) of the lift cylinder between the lift frame FL and the tilt means 8. The fourth proximity switch S4 (see FIG. 12(c)) detects the secondary slide amount of the body B between the body B and the lift frame FL, that is, the fifth proximity switch S5 (FIG. 13(e). )) are respectively provided.

  The first to fifth proximity switches S1 to S5 are connected to a bodywork side control device UK (first control device UK1 to be described later), and detection signals of these proximity switches S1 to S5 are used for loading and unloading bodies to be described later. It is used for sequence control of the first and second hydraulic actuators A1 and A2, which is executed during control.

  Further, at the front part of the load receiving base Bm of the body B, it is possible to forcibly pull up an object to be conveyed (for example, a broken vehicle V'which is difficult to travel by itself) by operating with the oil discharged from the hydraulic pump P above the load receiving base Bm. A hydraulic winch HW is provided. The hydraulic winch HW includes a winch drum HWd capable of winding and unwinding the wire w, and a third hydraulic actuator A3 including a hydraulic motor which is linked to the winch drum HWd and can drive the drum to rotate. The casing of the 3-hydraulic actuator A3 is fixedly supported on the load receiving base Bm. Further, a plurality of guide pulleys g1 and g2 for rotatably engaging and guiding the wire w are attached on the load receiving base Bm, and a free end of the wire w can be engaged with and disengaged from a conveyed object such as a broken vehicle V'. A hook f to be locked to is provided.

  Further, at the rear end of the body B, the base of the road plate 100 that smoothly connects the upper surface of the body B and the ground and can smoothly pull up the failed vehicle V′ or the like onto the cargo receiving stand Bm is provided so that it can be undulated. Supported. Between the road plate 100 and the body B around the shaft support, an undulation driving means A4 that is operated by the discharge oil of the hydraulic pump P and can forcibly drive the road plate 100 up and down is interposed. The road plate 100 can be moved up and down between a down position in which the front end is in contact with the ground and a tilted down position and a substantially vertical upright position. In the present embodiment, the undulation driving means is composed of a fourth hydraulic actuator A4, which is composed of hydraulic cylinders, one end and the other end of which are pivotally connected to the lower portion of the load receiving base Bm and the base portion of the road plate 100, respectively.

  An operation panel CF (illustrated only in the block diagram of FIG. 4) as an operation device is provided in the cab of the base vehicle Vb. On this operation panel CF, the working modes of the working machine mounted on the body loading/unloading vehicle V, such as the body B, the hydraulic winch HW, and the road board 100 (more specifically, the first to fourth hydraulic actuators A1 to A4). First to third work selection switches CF-SW1 to 3 for arbitrarily selecting the operation mode, the power take-out switch P-SW, and the power source of the hydraulic pump P (that is, the engine E or the electric motor M). There is provided at least a first power source selection switch M-SWf for selecting, and a main switch (not shown).

  When the first power source selection switch M-SWf is turned on, the first motor selection signal is output to the bodywork side control device UK (the second control device UK2 described later), and when it is turned off, the first power source selection switch M-SWf is turned on. The motor selection signal is not output.

  Further, the first work selection switch CF-SW1 is used for loading and unloading the body B between the vehicle body F and the ground (more specifically, tilting control of the lift frame FL (that is, operating control of the first hydraulic actuator A1) and body operation). A switch for loading and unloading a body for instructing a front-back slide control (that is, an operation control of the second hydraulic actuator A2) on the lift frame FL of B in a predetermined order described later. It is composed of a pair of operation switches for individually instructing loading/unloading of the body B.

  Further, the second work selection switch CF-SW2 is a winch operation switch for instructing the operation of the hydraulic winch HW (that is, the operation control of the third hydraulic actuator A3), and in the present embodiment, winding/unwinding of the wire w is performed. It is composed of a pair of operation switches that individually issue commands.

  Further, the third work selection switch CF-SW3 is a road plate operation switch for instructing the operation of the road plate 100 (that is, the operation control of the fourth hydraulic actuator A4). It is composed of a pair of operation switches that individually command the tilt.

  Further, as illustrated in FIG. 10, a remote controller CR, which is independent of the operation panel CF and is portable, is prepared for the body loading/unloading vehicle V, and this remote controller CR also functions as an operation device. For this remote controller CR, each working mode of the working machines B, HW, 100 mounted on the body loading/unloading vehicle V (more specifically, operating modes of the first to fourth hydraulic actuators A1 to A4) is arbitrarily selected. A plurality of operation speeds of the hydraulic pump P (more specifically, the operational speed of the engine E or the electric motor M which is the power source of the hydraulic pump P). There is provided at least a speed changeover switch CR-SW4 for performing a switching operation to a step and a second power source selection switch M-SWr for selecting a power source of the hydraulic pump P (that is, the engine E or the electric motor M). Be done.

  The first to third work selection switches CR-SW1 to 3 of the remote control CR have basically the same operation function as the first to third work selection switches CF-SW1 to 3 provided on the operation panel CF. is there. That is, the first work selection switch CR-SW1 is a body loading/unloading switch including a pair of operation switches for individually instructing loading/unloading of the body B, and the second work selection switch CR-SW2 is a wire w. Is a switch for operating the hydraulic winch HW consisting of a pair of operation switches for individually instructing the winding/unwinding of the work, and the third work selection switch CR-SW3 individually commands the standing/falling of the road board 100. It is a road board operation switch including a pair of operation switches. When the second power source selection switch M-SWr is turned on, a second motor selection signal is output to the bodywork side control device UK (second control device UK2 described later), and when it is turned off, the second power source selection switch M-SWr is turned on. The 2-motor selection signal is not output.

  Further, the operation panel CF and the display plate Bfi attached to the rear surface of the front plate Bf standing upright on the front part of the cargo receiving stand Bm are used as a clue for determining the switching operation timing for the power source selection switches M-SWf and M-SWr. First to fifth notification lamps L1 to L5 are provided as notification means for notifying the worker of predetermined information. The display board Bfi is arranged at a height (for example, a height higher than the bumper height) that can be viewed by an operator who has boarded a defective vehicle V′ or the like loaded on the cargo receiving stand Bm without being obstructed by the vehicle hood. To be done. In addition, the installation position of the display plate Bfi on the front plate Bf is the rear surface of the front plate Bf in the present embodiment, but it is not limited to the installation position. For example, the display plate Bfi is installed on the outer peripheral portion of the front plate Bf. Good.

  The first to fifth notification lamps L1 to L5 can be turned on when a key switch (not shown) of the vehicle V is turned on. In particular, the first notification lamp L1 is the hydraulic pump P. When the electric motor M can be driven normally, it is lit to notify that fact, and the second notification lamp L2 notifies that when the remaining amount of the battery BA is below a predetermined value. The third notification lamp L3 is turned on to notify that effect when the hydraulic pump P is driven by the electric motor M (that is, the motor is being driven), and the fourth notification lamp L4 is turned on. Lights up to notify when the remaining amount of the battery BA exceeds a predetermined value and is sufficient, and the fifth notification lamp L5 indicates that the power source selection switch M-SWf or M-SWr indicates the motor drive state. The light is turned on to notify the user of the selected operation position. The operation panel CF and the display plate Bfi of the front plate Bf are provided with notification contents (display information) of the notification lamps L1 to L5, respectively.

  The "state in which the electric motor M can be normally driven" notified by the first notification lamp L1 means that the remaining amount of the battery BA (that is, the charged amount of electricity) is ensured, that is, a predetermined lower limit value or more. And a state in which an electric system including the electric motor M and the battery BA (hereinafter, simply referred to as “electric system”) for operating the electric motor M with electric power from the battery BA is not in failure ( That is, it means a state in which the electric system is functioning normally without any failure such as disconnection, short circuit, or element damage.

  The notification lamps L1 to L5 described above are appropriately color-coded for each notification function to facilitate visual identification of the notification function, or at least a part of the notification lamps is changed in blinking mode (for example, blinking interval). May be changed). Further, as the first to fifth notifying means, instead of (or in addition to) the first to fifth notifying lamps L1 to L5 of the present embodiment, use a sound generating means that emits a predetermined notifying sound or announcement sound. Is also possible. In this specification, the notification lamps L1 to L5 are used in a broad concept including not only a light bulb and a pilot lamp but also an LED (light emitting diode) and a liquid crystal with a backlight.

  By the way, although the operation panel CF is installed in the driver's cab of the base vehicle Vb in this embodiment, a third operation panel (not shown) is provided outside the driver's cab of the base vehicle Vb in addition to or instead of this arrangement. The vehicle may be placed in a proper place. Further, in the present embodiment, the remote controller CR uses the radio wave to input each operation input to the work selection switches CR-SW1 to CR-3, the speed changeover switch CR-SW4, and the second power source selection switch M-SWr on the body side control device. Although the wireless remote controller capable of transmitting to the UK is used, a wired remote controller may be used.

  Further, a hydraulic circuit including the hydraulic pump P for operating the vehicle-mounted working machine, that is, the body B, the hydraulic winch HW, and the road plate 100 is mounted at an appropriate position of the body K. As shown in FIG. 11, this hydraulic circuit connects a hydraulic pump P having a suction side connected to an oil tank T and a discharge side of the hydraulic pump P to the first to fourth hydraulic actuators A1 to A4 in parallel. First to fourth valves v1 to v4 respectively installed in the oil passages, and relief valves installed between the discharge side of the hydraulic pump P and the oil tank T in order to keep the discharge pressure of the hydraulic pump P below a predetermined value. And at least R.

  In the present embodiment, the first to fourth valves v1 to v4 each include a three-position electromagnetic switching valve, and are connected to the first control device UK1 of the bodywork side control device UK. Then, the first control device UK1 responds to the operation input to the work selection switches CF-SW1 to 3 and CR-SW1 to 3 (that is, the work selection switches CF-SW1 to 3 and CR-SW1 to 3 are turned on). The corresponding valves v1 to v4 are switched to one side or the other by exciting the solenoids of the corresponding valves v1 to v4 which are transmitted during the operation (depending on the control signal input to the first control unit UK1). The hydraulic actuators A1 to A4 (more specifically, the work machines B, HW, 100) are caused to perform the work corresponding to the operation input as the valve operating state switched to the position. Further, when the input of the control signal from the first control unit UK1 is stopped (that is, the solenoid is demagnetized), the valves v1 to v4 are automatically returned to and held at a predetermined neutral position by the elastic force of the built-in neutral spring. , The hydraulic actuators A1 to A4 (more specifically, the work machines B, HW, 100) stop the above work.

  That is, the first to fourth valves v1 to v4 independently switch the operation of the corresponding first to fourth hydraulic actuators A1 to A4 (forward/reverse operation in the case of a hydraulic motor, expansion/contraction operation in the case of a hydraulic cylinder). In order to perform control, it is configured to be able to perform supply/discharge control of hydraulic oil between each of the first to fourth hydraulic actuators A1 to A4 and the hydraulic pump P. Then, when the valves v1 to v4 are switched to the neutral position, at the same time, the valves v1 to v4 are disconnected from the corresponding hydraulic oil chambers of the hydraulic actuators A1 to A4, and the hydraulic actuators A1 to A4 are hydraulically locked. As a result, the corresponding work machine B, HW, 100 is stopped and locked at the work position at that time. In the present embodiment, the first to fourth valves v1 to v4 are collectively arranged as a multi-valve MV in a single base body and are unitized, and the multi-valve MV constitutes a valve device.

  The hydraulic pump P is composed of a variable discharge capacity type hydraulic pump. In particular, in the present embodiment, a plurality of plungers annularly arranged in a pump casing (not shown) and slidably fitted in the pump casings, and end portions of the plungers are provided. It consists of a swash plate type plunger pump that has a swash plate that can slide relative to the pump casing and that can rotate relative to the pump casing.By changing the tilt angle of the swash plate, the operating stroke of each plunger, and thus the pump discharge capacity It is possible. An electric actuator A for driving the swash plate is interlocked and connected to the swash plate so that the inclination angle can be changed.

  By the way, the bodywork side control device UK operates the work machines B, HW, 100 (more specifically , A first control device UK1 having a microcomputer as a main part, capable of outputting a valve control signal to the multi-valve MV to control the operation of the hydraulic actuators A1 to A4, and the first control device UK1 and vehicle side control. It is composed of a second control device UK2 which is interposed between the devices UV and can perform signal exchange between them, that is, an interface function. It should be noted that the vehicle-side control device UV and the bodywork control device UK are both energized and activated by the vehicle-mounted power source in response to the on-operation of the key switch of the vehicle, and the key switch is off-operated. According to the above, the power is turned off and the operation is stopped.

  The first control device UK1 is a work device control device that is conventionally mounted and used on a body loading/unloading vehicle V in order to control the operation of the work devices B, HW, 100 (more specifically, hydraulic actuators A1 to A4). The control device basically has the same structure as that of the control panel CF and the operation selection switches CF-SW1 to 3 and CR-SW1 to 3 of the remote control CR (more specifically, the control panel CF). And a control signal transmitted by the remote control CR in response to the operation input) and an operation input to the speed changeover switch CR-SW4 of the remote control CR (more specifically, a control signal transmitted by the remote control CR in response to the operation input). And an operation input to the power source selection switches M-SWf and M-SWr of the operation panel CF and the remote controller CR (more specifically, output of a motor selection signal transmitted by the operation panel CF and the remote controller CR in response to the operation input.・Connected to receive (non-output).

Further, the first control device UK1 has a first control of a control signal output from an operation panel CF as an operation device or a remote controller CR according to an operation input to the work selection switches CF-SW1 to 3 and CR-SW1 to 3. A common terminal block CT that serves as a signal input unit to the device UK1 is attached . The common terminal block CT has a common terminal CTa that is independent of the input path of the control signal. Normally, the common terminal CTa is supplied with a predetermined voltage from the second control device UK2 (for example, the output voltage of the on-vehicle battery). 24V) is applied. This applied voltage supplies power to the connection device of each terminal via each terminal of the common terminal block CT, so that the connection device can function normally.

  On the other hand, unless the predetermined voltage is applied to the common terminal CTa, the connected device cannot receive electric power and does not function effectively. For example, if the connected device is a switch, an operation input is made to this. However, the operation signal corresponding to the operation input cannot be output from the switch, and if the connected device is, for example, a receiver, the reception function is invalid. Thus, the common terminal block CT allows the control signal corresponding to the operation input to the first control device UK1 when a predetermined voltage is applied to the common terminal CTa. When the predetermined voltage is not applied, the input of the control signal to the first control device UK1 is prohibited.

  Thus, the second control device UK2 normally applies the predetermined voltage to the common terminal CTa when the hydraulic pump P is in the motor drive state, but when the remaining capacity of the battery BA drops below the predetermined value, the second control device UK2 receives the common voltage. The application of the predetermined voltage to the terminal CTa is stopped. Thus, the common terminal block CT, the signal line 201 for applying the predetermined voltage from the second control unit UK2 to the common terminal CTa thereof, and the second control unit UK2 cooperate with each other to drive the hydraulic pump P to drive the motor. The input prohibiting means CX prohibits the input of the operation input to the control device U (first control device UK1) when the state of charge and the remaining capacity of the battery BA drops below a predetermined value.

  Further, in the present embodiment, since the remote controller CR is a wireless remote controller, the first control device UK1 is provided with a receiver 200 capable of receiving the control signal (radio wave) emitted by the remote controller CR. The receiver 200 has a signal output unit that outputs a reception signal corresponding to a control signal (radio wave) emitted from the remote controller CR in response to an operation input to the work selection switches CR-SW1 to SW3. The output unit is connected to the first control device UK1 via the common terminal block CT.

  Further, the receiver 200 has a signal output section for outputting a reception signal corresponding to a control signal (radio wave) emitted by the remote controller CR in response to an operation input to the speed changeover switch CR-SW4. Is connected to the first control device UK1 without going through the common terminal block CT.

  Further, the receiver 200 has a signal output unit that outputs a reception signal corresponding to the control signal (radio wave) generated by the remote controller CR in response to an operation input to the motor drive selection switch M-SWr. The output unit is connected to the second control device UK2 without passing through the common terminal block CT and the first control device UK1.

  The receiver 200 outputs the reception signal from the signal output unit while receiving the control signal (radio wave) emitted from the remote controller CR.

  Further, the first control device UK1 operates the multi-valve MV (each valve v1 to v4) that controls the operation of the first to fourth hydraulic actuators A1 to A4 that operate the work machine (body B, hydraulic winch HW, road plate 100). ), and can individually output operation command signals (control signals) to the valves v1 to v4.

  Further, the first control device UK1 determines the speed when any of the work implements B, HW, 100 is operating based on the operation input status to the work selection switches CF-SW1 to 3 and CR-SW1 to 3. Depending on an operation input to the changeover switch CR-SW4, a plurality of (for increasing the rotational speed of the engine E in a plurality of stages (two stages in the present embodiment) or increasing or decreasing the rotational speed of the electric motor M in a plurality of stages are used. The first and second) idle-up signals can be output to the second control device UK2. Then, in response to the input of the idle up signal, the second control device UK2 outputs the work machine operating signal indicating that the work machines B, HW, 100 are operating, and the electronic governor signal corresponding to the idle up signal. Is output to the engine control unit and the motor control unit of the vehicle-side control device UV so that the output rotation speed of the engine E or the electric motor M can be increased and controlled in multiple stages.

  That is, the first control device UK1 outputs a plurality of idle-up signals (speed switching signals) for switching the operating speed of the hydraulic pump P to a plurality of stages in response to the operation input to the speed changeover switch CR-SW4. It is possible to output to UK2. When the signal conversion means TR included in the second control device UK2 can output a plurality of electronic governor signals corresponding to the plurality of idle-up signals as voltage signals, and the hydraulic pump P is in an engine driving state. Of the electronic governor signal (that is, the electronic governor signal for driving the engine) and the plurality of electronic governor signals when the hydraulic pump P is in the motor driving state (that is, the electronic governor signal for electric power) are different from each other. It is configured to change the output voltage range of the electronic governor signal depending on whether the hydraulic pump P is in the engine driving state or the motor driving state.

  For example, in the present embodiment, when the hydraulic pump P is in the engine driving state, the output voltage region of the electronic governor signal for driving the engine is the low voltage region, and when the hydraulic pump P is in the motor driving state. The output voltage region of the electronic governor signal for electric drive is set to the high voltage region.

  A specific example of this signal conversion is shown in Table 1 as follows.

  Thus, in this embodiment, when the vehicle side control device UV sets the power take-off device PTO to the power connection state in response to the power take-out switch P-SW being turned on, the power source selection switch M-SWf , M-SWr, when the engine E is selected as the pump power source by the operation input to the vehicle M, the vehicle-side control device UV controls the engine E to the idling state (that is, the slow speed), and accordingly the hydraulic pump P is Standby operation at slow speed. When the electric motor M is selected as the pump power source, the electric motor M stands by in a stopped state.

  From this state, when the first and second work selection switches CF-SW1, 2 and CR-SW1, 2 are operated and input, the first control device UK1 of the bodywork side control device UK is operated according to the operation input. , A control signal is output to the valve device MV (corresponding valves v1 to v4) to switch the valve device MV, and a first idle-up signal is output to the second control device UK2. , And outputs a first electronic governor signal corresponding to the first idle-up signal to the vehicle-side control device UV. In this case, the first electronic governor signal for driving the engine is output to the vehicle side control device UV when the hydraulic pump P is in the engine driving state, and the first electronic governor signal for driving the motor is output to the vehicle side control device UV when the hydraulic pump P is in the motor driving state. It As a result, the vehicle-side control device UV operates the engine E or the electric motor M at a normal speed higher than the slow speed, so that the hydraulic pump P (thus the first to third hydraulic actuators A1 to A3, and hence the body). B or hydraulic winch HW) operates at normal speed.

  From this state, when the worker presses the speed changeover switch CR-SW4 of the remote controller CR once, the first control device UK1 outputs the second idle up signal to the second control device UK2, and the second idle up signal is output. The corresponding second electronic governor signal is output to the vehicle-side control device UV. In this case, if the hydraulic pump P is in the engine driving state, the second electronic governor signal for driving the engine is output, and if the hydraulic pump P is in the motor driving state, the second electronic governor signal for driving the motor is output to the vehicle side control device UV. It As a result, the vehicle-side control device UV operates the engine E or the electric motor M at a higher speed than the normal speed, so that the hydraulic pump P (thus the first to third hydraulic actuators A1 to A3, and eventually the body B). Alternatively, the hydraulic winch HW) operates at high speed.

  From this state, when the worker presses the speed changeover switch CR-SW4 of the remote controller CR again, the first control device UK1 outputs the first idle-up signal to the second control device UK2, and the first idle-up signal is output. The first electronic governor signal corresponding to is output to the vehicle side control device UV. As a result, the vehicle-side control device UV operates the engine E or the electric motor M at the normal speed, so that the hydraulic pump P (thus the first to third hydraulic actuators A1 to A3, and eventually the body B or the hydraulic winch HW). ) Operates at normal speed. After that, each time the speed changeover switch CR-SW4 is pressed, the idle-up signal output from the first control unit UK1 is alternately switched, and accordingly, the operating speed of the engine E or the electric motor M is increased to the normal speed and the high speed. Alternate between and.

  In the second control device UK2 of the present embodiment, the electronic governor signal differs between the case where the hydraulic pump P is in the engine driving state and the case where the hydraulic pump P is in the motor driving state as described above (that is, the electronic governor signal for engine driving differs from the electronic governor signal). In order to output the electronic governor signal for electric power in a different signal form), the signal converter means TR for converting the idle-up signal from the first control device UK1 is provided. Therefore, the signal form of the speed switching signal (idle-up signal) output from the first control device UK1 in accordance with the operation input to the speed switching switch CR-SW4 is determined depending on whether the hydraulic pump P is in the engine driving state or the electric driving state. Therefore, the number of speed switching signals (idle up signals) to be output by the first control unit UK1 can be reduced accordingly. Therefore, in the body-side control device UK, not only can the structure of the first control device UK1 that is responsible for the switching control of the valve device MV be simplified, but also a common vehicle regardless of whether the work vehicle is a hybrid type or a non-hybrid type. One control device UK1 can be used, and the cost can be saved.

  Further, in particular, the first control device UK1 of the present embodiment outputs a plurality of idle-up signals for switching the operating speed of the hydraulic pump P to a plurality of stages (for example, two stages) according to the operation input to the speed changeover switch CR-SW4. It is possible to output to the second control device UK2, and the signal conversion means TR can output a plurality of electronic governor signals corresponding to a plurality of idle-up signals as voltage signals, and the hydraulic pump P is in an engine driving state. In this case, the output voltage range of the electronic governor signal is changed between the engine driving state and the motor driving state so that the plurality of electronic governor signals in the case and the plurality of electronic governor signals when the pump is in the motor driving state are different from each other. .. Therefore, even if the number of speed switching stages is large, the signal conversion means TR can simply change (that is, voltage convert) the output voltage region of the electronic governor signal in the second control device UK2 according to the speed switching stages. Since the configuration is sufficient, further cost reduction can be achieved.

  In the present embodiment, an example in which two types of idle-up signals for switching the operating speed of the hydraulic pump P to two stages are output from the first control device UK1 to the second control device UK2 has been exemplified. Can be arbitrarily set, and may be, for example, one step or three or more steps. In any case, the number of speed switching signals corresponding to the number of switching stages is output from the first control device UK1 to the second control device UK2.

  Further, the motor drive selection switch M-SWf of the operation panel CF is connected to the second control device UK2 so as to receive the operation input signal, and the first to fifth notification lamps L1 to 5 are connected to the second control device UK2. 2 The control unit UK2 is connected so that it can be informed (lighted) by the output current from the control unit UK2.

  Further, from the second control device UK2, the power source selection switches M-SWf, M-SWr are turned on and the motor selection signal is output, and accordingly, the motor drive command signal is output to the motor control of the vehicle side control device UV. The electric power can be output to the unit, and the energization from the battery BA to the electric motor M (therefore motor operation) can be executed based on the motor drive command signal and the working machine operating signal. That is, when the vehicle-side control device UV receives the motor drive command signal from the second control device UK2, the vehicle-side control device UV can control the engine E, the electric motor M, and the power selection and extraction mechanism PS so that the pump power source is the electric motor M. When the power take-out connection signal is received from the power take-out switch P-SW without receiving the motor drive command signal from the second control device UK2, the engine E, the electric motor M, and the power select are set so that the pump power source is the engine E. The take-out mechanism PS can be controlled. Thus, the second control device UK2 operates the hydraulic pump P in response to the operation input to the power source selection switches M-SWf, M-SWr and the power take-out switch P-SW and in cooperation with the vehicle side control device UV. The engine drive state driven by the engine E and the motor drive state driven by the electric motor M can be switched and controlled.

  Further, the second control device UK2 receives a tilt signal from the first control device UK1 in response to an operation input to the first work selection switches CF-SW1, CR-SW1 of the operation panel CF or the remote controller CR. It is possible to determine whether the body B is in the loading/unloading state between the vehicle body F and the ground based on the signal. The second control device UK2 also receives a winch operation signal from the first control device UK1 in response to an operation input to the second work selection switches CF-SW2 and CR-SW2 of the operation panel CF or the remote controller CR. The signal can be used to determine whether or not the hydraulic winch HW is in an operating state. Further, the second control device UK2 receives a road plate undulation signal from the first control device UK1 in response to an operation input to the third work selection switches CF-SW3, CR-SW3 of the operation panel CF or the remote control CR. The signal can be used to determine whether or not the road plate 100 is in the undulating operation state. Then, based on the results of these determinations, the second control device UK2 cooperates with the vehicle-side control device UV to operate the working machine (body B, hydraulic winch HW, road plate 100) in an operating manner as shown in Table 2. The pump power source (that is, the engine E or the electric motor M) for operating the pump is selected, and the operating speeds of the power sources E and M (and therefore the operating speed of the hydraulic pump P) are selected.

  As shown in Table 2, in the present embodiment, when the body B is loaded and unloaded according to the operation input to the first work selection switches CF-SW1 and CR-SW1, the power source selection switches M-SWf and M- are used. The power source of the hydraulic pump P is arbitrarily selected from the engine E or the electric motor M according to the operation input to the SWr, and the electric power is given priority. In this case, "electricity priority" means that if the engine E is selected as the pump power source according to the operation input to the power source selection switches M-SWf and M-SWr, the work immediately after the operation input is performed. If the driver is informed that "engine drive has been selected" for a predetermined period, and if the motor drive is not switched within the informed period, the engine is switched to the engine drive state (that is, waits for the informed period). On the contrary, when the electric motor M is selected as the pump power source according to the operation input to the power source selection switches M-SWf and M-SWr, the motor drive state is immediately issued without the above notification. It is to move to. In each of the above cases, the speed change of the engine E or the electric motor M is performed at any time according to the operation input to the speed change switch CR-SW4 as described above.

  When operating the hydraulic winch HW according to the operation input to the second work selection switches CF-SW2 and CR-SW2, the pump power source is operated according to the operation input to the power source selection switches M-SWf and M-SWr. As described above, the engine E or the electric motor M is arbitrarily selected, and the above-described "electrical priority" processing is not adopted. In addition, when operating the hydraulic winch HW as necessary, the above-mentioned option and "electrical priority" or "engine priority" may be adopted. Even in the above case, the speed change of the engine E or the electric motor M is performed at any time according to the operation input to the speed change switch CR-SW4 as described above.

  When the road plate 100 is raised and lowered by the fourth hydraulic actuator A4 in response to an operation input to the third work selection switches CF-SW3 and CR-SW3, the control unit U (vehicle-side control unit UV) is used to drive the power source. The pump power source is selected for the electric motor M regardless of the operation input to the selection switches M-SWf and M-SWr. Moreover, when the road board 100 is rotated upright, the electric motor M is rotated at a normal speed, and when the road board 100 is turned down, the electric motor M is rotated at a slow speed so that the road board 100 is grounded. This is done gently so that the impact at the time of touchdown can be reduced.

  As described above, in the present embodiment, when the road board 100 is driven up and down, the hydraulic pump P is placed in the motor drive state. Therefore, when the road board 100 with a relatively low load is driven up and down, the hydraulic pump P can be electrically operated without any trouble. It can be driven, and noise during work can be reduced.

  By the way, there are the following exceptions to the control in which the hydraulic pump P is electrically operated when the road plate 100 is driven up and down (particularly in a tilted rotation). That is, the control device U (vehicle-side control device UV) immediately after that (for example, before a lapse of a predetermined time) when the hydraulic pump P is placed in the engine drive state to lower the body B from the vehicle body to the ground. When the road plate 100 is turned down on the basis of the operation input to the third work selection switches CF-SW3 and CR-SW3 for operating the road plate, the hydraulic pump P is continuously placed in the engine drive state and the motor is operated. It does not switch to the driving state. As a result, it is possible to avoid the loss of work time due to the switching of the power source, and there is an advantage that the work efficiency is improved and the work time is shortened as a whole.

  Further, a motor drive permission signal can be output from the vehicle side control device UV to the second control device UK2 side. The motor drive permission signal is output when the electric system is normal and the battery BA is not dead (that is, the remaining amount is lower than the predetermined lower limit value). Therefore, the electric system fails. Alternatively, when the battery BA runs out of the battery, the motor drive permission signal is not output.

  Further, although not shown, a failure diagnosis circuit for detecting the presence/absence of a failure in the electric system is provided between the battery BA and the electric motor M. The failure diagnosis circuit and the battery sensor provided in the battery BA are provided. By inputting each detection signal from the vehicle-side control device UV, each output mode of the vehicle-side control device UV is used to determine whether to output the motor drive permission signal or stop the output. It

  Further, an engine operating signal for identifying whether the engine E is in operation or stopped can be input to the second control device UK2 of the bodywork side control device UK from a sensor provided in the engine E. A battery remaining amount signal indicating the remaining amount of the battery BA can be input from a sensor provided in the battery BA, and is output when the engine E is started by an operation input to the starter switch S-SW. An engine start signal can be input from a sensor provided in the starter switch S-SW, and a power take-out switch operation signal output when the power take-out switch P-SW is turned on is a power take-out switch P-SW. It is possible to input from the sensor provided in.

  Then, the second control device UK2, based on the motor drive permission signal from the vehicle-side control device UV and the motor selection signal from the power source selection switches M-SWf and M-SWr, which are input thereto, the operation panel CF. And the first to fifth notification lamps L1 to L5 provided on the display board Bfi of the front plate Bf of the cargo receiving stand can be controlled to perform notification (lighting).

  Further, when the second control device UK2 determines that the remaining capacity of the battery BA is sufficient in the motor driving state of the hydraulic pump P and no abnormality has occurred in the electric system, the common terminal CTa of the common terminal block CT is used. The predetermined voltage is applied to. As a result, the common terminal block CT inputs an operation input to the work selection switches CF-SW1 to 3 and CR-SW1 to 3 (more specifically, work selection switches CF-SW1 to 3 and CR-SW1 according to the operation input). (Control signals output from 3 to 3) are allowed to be input to the first control device UK1, and the corresponding hydraulic actuators A1 to A4 (hence the working machines B, HW, 100) are operated according to the control signals.

  On the other hand, when the second control device UK2 determines that the battery BA has run out (that is, the remaining amount has dropped below a predetermined lower limit value) in the motor drive state of the hydraulic pump P, or that an abnormality has occurred in the electric system. Stops the application of the predetermined voltage to the common terminal CTa of the common terminal block CT. As a result, an operation input to the work selection switches CF-SW1 to 3 and CR-SW1 to 3 (more specifically, output from the work selection switches CF-SW1 to 3 and CR-SW1 to 3 in response to the operation input). Control signal), which is supposed to be a control signal), is not input to the first control device UK1, so that the valve operation signal output from the first control device UK1 to the valve device MV is not output based on the control signal, and therefore the valve device MV is not output. Each of the valves v1 to v4 is demagnetized and automatically returned to the neutral state by the elastic force of the built-in neutral spring, so that the working machines B, HW, 100 in operation can be stopped urgently.

  Therefore, with a simple structure in which the input prohibiting means CX for prohibiting the input of the above-mentioned operation input to the first control device UK1 is simply added to the bodywork side control device UK, the work machines B, HW, It is possible to effectively prevent the 100 from performing an unexpected operation. In particular, in the present embodiment, the input prohibiting means CX applies a predetermined voltage from the second control device UK2 to the single common terminal block CT serving as the control signal input section of the first control device UK1 and the common terminal CTa of the terminal block CT. Has a simple structure including the signal line 201 which is normally applied and which is not applied when the remaining battery capacity is reduced, which can greatly contribute to cost reduction.

  Thus, in the bodywork side control device UK of the present embodiment, the motor drive state of the hydraulic pump P is determined according to the operation input to the motor drive selection switches M-SWf and M-SWr as power source selection switches. In switching control between the vehicle-side control device UK and the engine-driven state, all the signals to be transmitted/received between the vehicle-body side control device UK and the vehicle-side control device UV are input/output on the vehicle-body side control device UK side. It is provided only in the second control device UK2.

  Therefore, in the bodywork-side control device UK, the interface function portion for exchanging information (signal) between this and the vehicle-side control device UV can be integrated in the second control device UK2, and thus the work selection switch. CF-SW1 to 3; a conventionally known work machine control device (that is, a control device corresponding to the first control device UK1) that controls the operation of the work machines B, HW, and 100 based on the operation input to the CR-SW1 to 3; It is possible to easily construct a new body-side control device UK compatible with a hybrid work vehicle by simply diverting it and simply adding and connecting the newly developed second control device UK2 thereto. As a result, the development cost can be reduced and the development period can be shortened, and the parts (i.e., the first part) can be provided between the normal type work vehicle that drives the hydraulic pump for the work machine only by the engine and the hybrid work vehicle. One control device (control device corresponding to the control device UK1) is shared.

  Next, the operation of the above embodiment will be described.

Next, an example of a work mode for loading and unloading a body will be described mainly with reference to FIGS.
[Process of lowering the body B on the vehicle to the ground]
1) In FIG. 12(a), the vehicle is in the running posture, the body B is on the vehicle body frame FS, and the connecting means J connects the body B and the lift frame FL. In this state, the first proximity switch S1 detects the slide amount of the body B at "0", and the second proximity switch S2 detects the tilt amount of the lift frame FL at "0".

  If the "down" operation switch of the first work selection switches CF-SW1 and CR-SW1 on the operation panel CF or the remote controller CR is turned on and the second proximity switch S2 detects "0", the hydraulic motor is used. A certain second hydraulic actuator A2 is driven in one direction, that is, in the backward direction, and with the backward movement of the connecting means J, the body B connected thereto starts to slide backward.

   2) As shown in FIG. 12(b), the body B is slid rearward by a predetermined amount, the male piece 35 is disengaged from the female piece 36, and the center of gravity CG of the body B is more than the rear end of the body frame FS. When the third proximity switch S3 also moves backward, the third proximity switch S3 detects the primary slide amount (about 1,900 mm), and in response to this detection signal, the one-way rotation of the second hydraulic actuator A2 is stopped and the first hydraulic actuator A1 is stopped. When the extension operation is performed, the body B tilts rearward together with the lift frame FL.

   3) As shown in FIG. 12C, when the body B is tilted backward by a predetermined amount (about 12°), the fourth proximity switch S4 detects this, and the detection signal causes the first hydraulic actuator A1 to extend. The operation is stopped, and the second hydraulic actuator A2 is driven again in one direction, that is, the reverse direction. By this reverse drive, as shown in FIG. 12D, the rear end of the body B is grounded via the grounding wheel 34 to the ground.

   4) After the ground contact, as shown in FIG. 13E, the body B slides backward to the secondary slide position while maintaining the ground contact state at the rear end. When the fifth proximity switch 5 detects the secondary slide position, the drive in the backward direction of the second hydraulic actuator A2 is stopped by this detection signal.

5) As shown in FIG. 13(f), when the first hydraulic actuator A1 is extended again and the body B is secondarily tilted, that is, tilted to the most tilted position, the rear end of the lift frame FL moves to the ground. Upon reaching, the body B is completely grounded (ie not only the rear end but also the front end). When the body B is completely lowered to the ground, the fourth hydraulic actuator A4 is operated based on the operation input to the third work selection switches CF-SW3 and CR-SW3 for operating the road plate, and the road plate 100 in the upright state is lowered. It is turned upside down to smoothly connect the top of the cargo receiving stand Bm to the ground, and in this state, the transported object such as the failed vehicle V′ is loaded on the body B through the road plate 100.
[Process of loading body B on the ground onto the vehicle]
In this case, basically, the reverse operation to the case of "unloading" is performed, and therefore its operation diagram is omitted.

   1) Before loading the body, the rear end of the lift frame FL and the front end of the body B are coupled with each other in a state where the lift frame FL is tilted to the most tilted position, that is, the secondary tilted position, as shown in FIG. 13(f). Is in a state. Further, the road plate 100 is rotated to the standing position by the fourth hydraulic actuator A4. If the "loading" switches of the first work selection switches CF-SW1 and CR-SW1 are turned on in this state, the lift frame FL tilts downward due to the contraction operation of the first hydraulic actuator A1.

   2) If the fourth proximity switch S4 detects the primary tilt (about 12°) of the lift frame FL due to the downward tilt, the downward tilt of the lift frame FL is stopped by stopping the contraction of the first hydraulic actuator A1, and then the 2 The hydraulic actuator A2 drives the body B in the forward direction.

   3) By this forward drive, the body B slides forward on the lift frame FL halfway, and the third proximity switch S3 detects the primary slide amount.

   4) By the detection of the third proximity switch S3, the forward drive of the second hydraulic actuator A2 is stopped, the first hydraulic actuator A1 is contracted again, and the lift frame FL is tilted downward together with the body B to be placed on the body frame F. It is mounted via the subframe 2. Then, the tilt angle “0” of the lift frame FL is detected by the second proximity switch S2. As a result, the contraction operation of the first hydraulic actuator A1 is stopped, the second hydraulic actuator A2 is driven in the forward direction again, and the body B slides forward to the foremost end position so that the center of gravity CG of the body B is above the lift frame FL. Then, the first proximity switch S1 detects the slide amount “0” of the body B.

   5) When the first proximity switch S1 detects the sliding amount "0" of the body B, the traveling lamp in the driver's seat is turned on, the vehicle is in the traveling posture, and the loading of the body B is completed.

For loading and unloading the body B between the vehicle body and the ground as described above, the first hydraulic actuator A1 that tilt-controls the body B and the second hydraulic actuator A2 that similarly slides back and forth are sequence-controlled in a predetermined order. The sequence control is performed based on the detection signals of the first to fifth proximity switches S1 to S5, and the vehicle body side control device UK, in particular, the first control device UK1 is operated by the valve device MV (valve v1, v2) is switched and controlled in a predetermined order.
[The process of loading the broken vehicle V'on the body B]
When loading a failed vehicle V′ or the like onto the body B, the body B is completely lowered to the ground as shown in FIG. 13(f), or the body B is tilted forward as shown in FIG. 13(e). Keep the rear end in contact with the ground. Then, the broken vehicle V′ or the like is locked to the hook f at the tip of the wire w fed from the hydraulic winch HW, and the hydraulic winch HW is wound by the third hydraulic actuator A3 to operate the broken vehicle V′ or the like of the body B. Make sure to forcibly pull it up on the receiving platform Bm.

  In this case, the worker may, for example, get in the front seat of the broken vehicle V′ or be outside the vehicle around the broken vehicle V′ and operate the winding operation switch of the third work selection switch CR-SW3 of the remote controller CR. If the button is kept pressed, the hydraulic winch HW can be wound and operated. Alternatively, even if the worker is in the driver's seat of the base vehicle Vb and continues to press the winding operation switch of the third work selection switch CF-SW3 of the operation panel CF, the operator operates the hydraulic winch HW. You can

  By the way, in the body loading/unloading vehicle of the present embodiment, when the electric motor M is selected as the pump power source when the failed vehicle or the like is lifted by the hydraulic winch HW (third hydraulic actuator A3), the lifting load is large, There is a possibility that the battery will run out on the way and the electric motor M and hence the hydraulic pump P will stop. In such a case, the reverse rotation prevention mechanism that is generally equipped in the electric motor or the winch operates, and the failed vehicle V', etc. suddenly stops while the failed vehicle V', etc. is being pulled up. At that time, an operator may not be able to easily determine whether the cause of the stop is a battery exhaustion or a broken vehicle is caught in the body or the like. In particular, it is more difficult for a worker who gets into the driver's seat of the faulty vehicle V′ or the like when pulling up the vehicle to perform a driving operation.

  However, in the present embodiment, the body front plate Bf is provided with notification lamps L1 to L5 for notifying the worker of predetermined information serving as a clue for determining the switching operation timing for the power source selection switches M-SWf and M-SWr. Since the worker is provided in the vehicle such as the faulty vehicle V′, the worker can determine that the above cause, that is, the faulty vehicle V′ or the like is caused by the body B or the like from the lighting state of the notification lamps L1 to L5 of the body front plate Bf. The worker can easily determine whether the vehicle is caught, the battery is dead, or the electric system is out of order. Especially, the operator who gets into the driver's seat of the broken vehicle V'at the time of pulling up and causes the operation is also the cause. It is easy to judge and very convenient.

  For example, when it is determined that the cause is a battery exhaustion or an electric system failure, the input prohibiting means CX (specifically, application of a predetermined voltage from the second control device UK2 to the common terminal CTa via the signal line 201). Is prohibited), the input of the control signal (operation input) to the first control device UK1 is prohibited. Therefore, since the operation input to the third work selection switch CR-SW3 for winch operation is not input to the first control device UK1, the valve device MV is demagnetized and returns to the neutral position, and the third hydraulic actuator A3 is stopped. . Next, the worker switches the power source selection switches M-SWf and M-SWr to switch the power source from the electric motor M to the engine E, whereby the hydraulic pump P is driven by the engine E and the common source is used. Since the application of the predetermined voltage to the terminal CTa is restarted, by pressing the third work selection switch CR-SW3 again (that is, restarting the operation input to the switch), the hydraulic winch HW is strongly operated again. The pulling operation can be restarted.

  If it is determined that the broken vehicle V′ or the like is an accident vehicle in which the lower part of the vehicle body, the tire, or the like is severely damaged and the bottom of the vehicle is strongly rubbed against the body B or the like, for example, the body B is On the other hand, by jacking up the broken vehicle V'and the like, and laying a carriage for guiding the movement between the broken vehicle V'and the loading platform Bm, it is possible to easily pull up the broken vehicle V'and the like on the loading platform Bm. it can. In any case, if the cause is easily known, the subsequent actions can be performed promptly and accurately, and the work efficiency can be improved as a whole.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments and various embodiments are possible within the scope of the present invention.

  For example, in the above-described embodiment, the body loading/unloading vehicle V is exemplified as the work vehicle, but in the present invention, various other work vehicles, for example, a refuse collection vehicle, a concrete mixer truck, a concrete pump truck, and a container with a loading/unloading function of a container. It is applicable to work vehicles such as transport vehicles.

  Further, in the above-described embodiment, the power of the electric motor M is applied to the hybrid vehicle in which the power of the electric motor M can be used for driving the wheels as well as the driving of the hydraulic pump. It may be used only for driving the hydraulic pump. In this case, an electric motor dedicated to driving the pump, a battery that supplies electric power to the electric motor, and an engine that is configured separately and independently from the running engine that applies driving force to the wheels and that is used only for driving the hydraulic pump, An embodiment in which a power selection and extraction mechanism capable of selectively extracting the power of the engine or the electric motor is mounted on the body K can also be adopted. In this embodiment, the vehicle-side control device UV of the above-described embodiment is used. The function of the engine/motor control unit may be configured such that the bodywork-side control device UK, particularly the second control device UK2, is responsible for controlling the engine/motor on the bodywork UK side.

  Further, in the above-described embodiment, each power source selection switch M-SWf, M-SWr has a motor drive selection position (on operation position in the embodiment) and an engine drive selection position (off operation position in the embodiment). In the present invention, one switch is used to alternately select both selection positions. However, in the present invention, whichever power source selection switch M-SWf, M-SWr is switched. Alternatively, the driving state (for example, engine driving state) of the hydraulic pump before the operation may be switched to another driving state (for example, motor driving state). Further, only the power source selection switch that has previously performed the power source selection operation of the hydraulic pump (for example, the ON operation for selecting the motor drive) among the plurality of power source selection switches M-SWf and M-SWr is the next time. A power source switching operation (for example, an off operation for selecting engine drive) may be performed.

  In the above embodiment, the motor drive state is selected by turning on the power source selection switches M-SWf and M-SWr, and the engine drive state is selected by turning off the power source selection switches M-SWf. The output signals of -SWf and M-SWr may be output modes capable of distinguishing and selecting the two power sources (motor/engine). For example, the engine drive is selected by the ON operation and the motor drive is selected by the OFF operation. It may be configured to be selected.

  Further, in the above-described embodiment, the power source selection switches M-SWf and M-SWr are shown to be exclusively used for power source selection, but in the present invention, the existing operation switch is also used as the power source selection switch. May be.

  In the above embodiment, the power take-out switch P-SW also serving as the engine drive state selecting switch is provided only on the operation panel CF, but the power take-out switch is provided separately from the engine driving state selecting switch. It may be an independent switch, and the power take-out switch can be installed not only on the operation panel CF but also on other parts of the driver's seat or the remote controller CR.

  Further, in the above embodiment, the road plate 100 is shown to be driven up and down by the hydraulic actuator A4, but in the present invention, the road plate 100 may be manually moved up and down.

  Further, in the above-described embodiment, the second control device UK2 of the vehicle-body-side control device UK is configured by a single control device, and the signal conversion means TR is incorporated therein. However, in the present invention, The second control device UK2 may be composed of a plurality of control device parts. In this case, in particular, if a specific control device portion that exerts the function of the signal conversion means TR and a control device portion that exerts other functions are separated, for example, when changing the electronic governor signal to be converted. It is sufficient to replace only the specific control device portion that exhibits the function of the signal converting means TR according to the type and signal form of the electronic governor signal to be converted, and the engine drive state and the electric drive state of the hydraulic pump P. When the vehicle-side control device UV that does not require different electronic governor signals is used, the control device portion that exhibits the other functions described above can be used as it is without any design change. Therefore, in either case, the corresponding cost can be reduced and the mounting can be facilitated.

A1 to A4... First to fourth hydraulic actuators (hydraulic actuators)
BA: Battery CF: Operation panel (operation device)
CR: Remote control (operating device)
CF-SW1, CR-SW1... Body loading/unloading switch (work selection switch)
CF-SW2, CR-SW2 ··· Winch operation switch (work selection switch)
CF-SW3, CR-SW3... Road plate operating switch (work selection switch)
CT: Common terminal block CTa: Common terminal CX: Input prohibition means E: Engine F: Vehicle body M: .... Electric motor M-SWf ... First power source selection switch (power source selection switch)
M-SWr: Second power source selection switch (power source selection switch)
MV ··· Multi valve (valve device)
P...-Hydraulic pump PS-Power selection and extraction mechanism U-Control device V-Vehicle loading/unloading vehicle (work vehicle)

Claims (2)

The working machine (B, 100, HW) mounted on the vehicle body (F), the hydraulic actuators (A1 to A4) for driving the working machine (B, 100, HW), and the hydraulic actuators (A1 to A4) A hydraulic pump (P) that can supply hydraulic oil and that can be driven by both an engine (E) and an electric motor (M) that operates with electric power from a battery (BA), an engine (E), and an electric motor A power selection and extraction mechanism (PS) capable of selectively extracting power from the motor (M) and transmitting the power to the hydraulic pump (P) and a disconnection state for interrupting the transmission of the power, and an engine (E) , An engine drive state in which the electric motor (M) and the power selective take-out mechanism (PS) are controlled to drive the hydraulic pump (P) by the engine (E), and a motor which drives the hydraulic pump (P) by the electric motor (M) A control unit (U) capable of switching to a drive state and a power source selection switch (M-SWf, M-SWr) for selectively operating the drive state of the hydraulic pump (P) to the engine drive state or the motor drive state. And work selection switches (CF-SW1 to 3 and CR-SW1 to 3) for arbitrarily selecting the operation mode of the hydraulic actuators (A1 to A4) and the work selection switches (CF-SW1 to 3 and CR). A valve for controlling the transfer of hydraulic oil between the hydraulic pump (P) and the hydraulic actuators (A1 to A4) so as to control the operation of the hydraulic actuators (A1 to A4) in accordance with the operation input to the SW1 to SW3). At least a device (MV),
The valve device (MV) is a valve operating state that allows supply of hydraulic oil from the hydraulic pump (P) to the hydraulic actuators (A1 to A4), and the hydraulic pump (P) and hydraulic actuators (A1 to A4). And a neutral state in which the hydraulic actuators (A1 to A4) are hydraulically locked.
When the operation input to the work selection switches (CF-SW1 to 3 and CR-SW1 to 3) is input to the control device (U), the control device (U) causes the valve device (MV) to operate. A valve operating signal is output to the valve device (MV) so as to be in the valve operating state corresponding to the operation input, and when the operation input is not input to the control device (U), the valve device (MV) is the neutral device. Stop the output of the valve actuation signal so that
Further, the control unit (U) prohibits the input of the operation input to the control unit (U) when the remaining capacity of the battery (BA) drops below a predetermined value in the motor driving state. A working vehicle, to which means (CX) are attached . The input prohibiting means (CX) is the control device for the control signal output from the operating device (CF, CR) in response to the operation input to the work selection switches (CF-SW1-3, CR-SW1-3). Includes a common terminal block (CT) that serves as an input to (U),
The common terminal block (CT) has a common terminal (CTa) independent of the input path of the control signal, and a state in which a predetermined voltage is applied to the common terminal (CTa) from the control device (U). Then, the input of the control signal corresponding to the operation input to the control device (U) is allowed, but in the state where the predetermined voltage is not applied to the common terminal (CTa) thereof, the control signal is sent to the control device (U). Configured to not be entered,
The control device (U) normally applies the predetermined voltage to the common terminal (CTa) when the hydraulic pump (P) is in the motor drive state, and the remaining capacity of the battery (BA) is The work vehicle according to claim 1, wherein application of the predetermined voltage to the common terminal (CTa) is stopped when the voltage drops below a predetermined value.

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