Working machinery

Abstract

To provide a work machine that is equipped with a portable battery that can be attached to and detached from a device support body, and that can prevent the work machine from becoming unstable due to the removal of the portable battery from the device support body.SOLUTION: A high-lift working vehicle 1 includes a swivel base 20 provided on a vehicle body 2 that can run, and a lifting device consisting of a boom 30 and a work platform 40. A battery mounting space LS1, in which a portable battery 80 is removably placed, is provided on the vehicle body 2. The high-lift working vehicle 1 is configured to restrict removal of the portable battery 80 from the battery mounting space LS1 when the lifting device is not in a retracted position.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a working machine equipped with a portable battery.

Background Art

[0002] Conventionally, a work vehicle is known as a working machine equipped with working devices suitable for respective works, such as an earth auger device for digging holes and constructing columns, a device for loading and unloading loads to be transported from a loading platform provided on the vehicle body, and a lifting device for lifting workers and equipment to perform high-altitude work. As such a work vehicle, there is known one equipped with a battery capable of supplying electric power to an electric device (such as an electric motor that is a drive source of a hydraulic pump that generates hydraulic pressure for operating the working device) mounted on the work vehicle (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The working machine (work vehicle) as described above may be used for restoration work in disaster-stricken areas of natural disasters. However, at such a work site, it is highly conceivable that the power supply network is cut off. Therefore, if the battery of the working machine can also be used for purposes other than the working device (for example, charging a mobile phone at an evacuation site of a natural disaster or powering a lighting device), more beneficial support can be provided in the disaster-stricken area.

[0005] Therefore, if a portable battery that can be attached to the device support (for example, the vehicle body in the case of a work vehicle) is mounted on the work machine, and the portable battery can be removed from the device support as needed and used for purposes other than the work machine, convenience can be further improved. However, if the portable battery can be removed at will, depending on the orientation of the work machine, when the portable battery is removed, the machine weight (for example, the vehicle weight in the case of a work vehicle) will decrease by the amount of the removed portable battery, which may worsen the center of gravity and weight balance of the work machine and make the work machine unstable.

[0006] The present invention has been made in view of these problems, and aims to provide a work machine that is equipped with a portable battery that can be attached to and detached from the device support, while preventing the work machine from becoming unstable when the portable battery is removed from the device support. [Means for solving the problem]

[0007] To solve the above problems, the present invention provides a work machine comprising a device support (for example, a vehicle body 2 in the embodiment), a work device provided on the device support (for example, a lifting device composed of a turntable 20, boom 30, and work platform 40 in the embodiment), and a portable battery, wherein a battery mounting section is provided on the device support for the portable battery to be removable, and the work machine (for example, an aerial work platform 1 in the embodiment) is provided on the device support. The posture detection means for detecting the posture of the work apparatus (for example, a boom slewing angle sensor 121, a boom luffing angle sensor 122, a boom length sensor 123, and a work platform slewing angle sensor 124 in the embodiment) is detected by the posture detection means. The posture of the aforementioned work device In the storage position stored in the aforementioned device support If not present, the system is configured to restrict the removal of the portable battery from the battery mounting section.

[0008] In the above-described work machine, The portable battery (for example, the battery mounting space LS1 in the embodiment) is removablely installed in the first battery mounting section of the device support, and the fixed battery is fixedly installed in the second battery mounting section of the device support (for example, the battery mounting space LS2 in the embodiment). It is preferable.

[0009] In the work machine having the above configuration, it is preferable that the machine includes a cover member that covers a plurality of portable batteries placed on the battery mounting section and has an opening of a size that allows the portable batteries to be inserted and removed, and a door that can open and close the opening, and a door locking device that can lock the door when it is closed, thereby restricting the removal of the portable batteries covered by the cover member from the battery mounting section by locking the door with the door locking device.

[0010] In the work machine having the above configuration, it is preferable that the machine is configured to include a locking member capable of locking the portable battery placed on the battery mounting section, and a locking device capable of locking the locking member in a state where the portable battery is locked, thereby restricting the removal of the portable battery locked by the locking member from the battery mounting section.

[0011] In the work machine with the above configuration, it is preferable that the working range of the work device can be set according to the number of portable batteries placed on the battery mounting section. [Effects of the Invention]

[0012] According to the present invention, if the posture of the work device does not meet predetermined conditions (for example, the condition that the stability of the work machine will not be adversely affected even if the portable battery is removed in that posture), the removal of the portable battery from the battery mounting section is restricted. This prevents the work machine from becoming unstable due to an adverse change in the center of gravity or weight balance caused by the removal of the portable battery.

[0013] Furthermore, in the above-described work machine, by configuring it so that the allowable working range of the work device can be set according to the number of portable batteries placed on the battery mounting section, it becomes possible to appropriately set the working range of the work device according to the number of portable batteries. [Brief explanation of the drawing]

[0014] [Figure 1] This is a side view showing the left side of the aerial work platform which is an embodiment of the present invention. [Figure 2] This is a side view showing the right side of the aerial work platform. [Figure 3] This is a block diagram showing the configuration related to the operation control of the aerial work platform. [Figure 4] This is a perspective view showing the configuration of the slot-in lock type battery placement space of the aerial work platform. [Figure 5] This is a schematic diagram showing the configuration of the battery locking member used in the slot-in lock type battery placement space. [Figure 6] This is a perspective view showing the configuration of the door lock type battery placement space of the aerial work platform. [Figure 7] This is a schematic diagram exemplifying the state when the lifting device of the aerial work platform is in the stowed position. [Figure 8] This is a schematic diagram exemplifying the state when the lifting device of the aerial work platform is in the working position. [Figure 9] This is a block diagram showing the configuration related to the lock control of the portable battery and the setting of the working range of the lifting device of the aerial work platform. [Figure 10] This is a diagram showing information related to the slot-in lock type locking lock of the aerial work platform in tabular form. [Figure 11] This is a diagram showing information related to the door lock type door lock of the aerial work platform in tabular form.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show the side external appearance of the aerial work platform 1 as a working machine according to an embodiment of the present invention. FIG. 1 shows the left side surface facing the front of the aerial work platform 1, and FIG. 2 shows the right side surface facing the front of the aerial work platform 1. In addition, the same components as those in FIG. 1 in FIG. 2 are denoted by the same reference numerals, and detailed descriptions thereof are omitted. Hereinafter, the overall configuration of the aerial work platform 1 will be mainly described with reference to these drawings.

[0016] As shown in FIGS. 1 and 2, the aerial work platform 1 has a cab 7 at the front part of the vehicle body 2 and is configured based on a truck vehicle that can travel by a pair of left and right tire wheels 5 arranged in the front and rear of the vehicle body 2. The tire wheels 5 are composed of a front wheel 5F including a left front wheel 5Fl and a right front wheel 5Fr, and a rear wheel 5R including a left rear wheel 5Rl and a right rear wheel 5Rr. The vehicle body 2 includes a chassis frame on which the left front wheel 5Fl, the right front wheel 5Fr, the left rear wheel 5Rl, and the right rear wheel 5Rr are arranged, and a sub-frame attached on this chassis frame.

[0017] Jacking devices for lifting and supporting the vehicle body 2 during aerial work are provided on the front, rear, left, and right of the vehicle body 2. The jacking devices are configured to include a pair of left and right front jacks 10F arranged behind the front wheel 5F and a pair of left and right rear jacks 10R arranged behind the rear wheel 5R. Specifically, a left front jack 10Fl is arranged behind the left front wheel 5Fl, a right front jack 10Fr is arranged behind the right front wheel 5Fr, a left rear jack 10Rl is arranged behind the left rear wheel 5Rl, and a right rear jack 10Rr is arranged behind the right rear wheel 5Rr. Each of the jacks 10F, 10R lifts and supports the vehicle body 2 by driving a jack cylinder 11 provided inside thereof to extend downward, thereby making the entire vehicle in a stable state.

[0018] Furthermore, the left front jack 10Fl, the right front jack 10Fr, the left rear jack 10Rl, and the right rear jack 10Rr are each equipped with an outrigger device (not shown). Inside each outrigger device is an outrigger cylinder 12 (see Figure 3), and by extending or retracting the outrigger cylinder 12, the corresponding jack device is moved horizontally in the width direction of the vehicle body 2 (from front to back / from back to front in Figure 1). Specifically, by extending the outrigger cylinder 12, the jack device is moved in a direction that protrudes outward from the side of the vehicle body 2. Also, by retracting the extended outrigger cylinder 12, the jack device that has protruded outward from the side of the vehicle body 2 is moved in a direction that retracts it into the vehicle body 2. At the rear end of the vehicle body 2, there is a lower operating device 27 for operating each jack device, outrigger device, and the boom 30, which will be described later.

[0019] As shown in Figure 1, a battery mounting space LS1 is provided on the underside of the left subframe of the vehicle body 2, between the left rear wheel 5Rl and the left rear jack 10Rl. Three portable batteries 80 (for example, composed of lithium-ion batteries) that can be individually detached from the vehicle body 2 are mounted in this battery mounting space LS1. Near the front of this battery mounting space LS1, two jack bases 13 (which are placed on the road surface to support the tip of the extendable jack device) and two wheel chocks 14 are housed. Also, on the left side of the vehicle body 2, two toolboxes 26 for storing work tools and equipment are provided, stacked one above the other. Behind the left front jack 10Fl and below the lower toolbox 26, a power unit 51 housing a hydraulic pump 52 (see Figure 3) and a pump drive motor 53 (see Figure 3), which will be described later, is mounted.

[0020] As shown in Figure 2, a battery mounting space LS2 is provided on the right side of the vehicle body 2 and below the subframe, between the right rear wheel 5Rr and the right rear jack 10Rr, and a fixed battery is installed in this battery mounting space LS2, which is fixed to the vehicle body 2 by a fastener Fx. A battery unit (for example, composed of a lithium-ion battery) is installed. Near the front of this battery mounting space LS2, two jack bases 13 and two wheel chocks 14 are housed. Between the battery mounting space LS2 and the right rear jack 10Rr, there is a standard charging outlet 15 for connecting to an external AC 100V-200V power supply and a fast charging outlet 16 for connecting to an external fast charger.

[0021] A muffler 17 is provided in front of the right rear wheel 5Rr, from which exhaust gases from the engine of the aerial work platform 1 are discharged. Furthermore, on the upper part of the subframe of the vehicle body 2, a cargo bed space is provided from behind the right front jack 10Fr to the position of the right rear wheel 5Rr, where construction tools used at the work site can be loaded, and side panels 18 are attached to the sides of this cargo bed space so as to be able to be opened and closed.

[0022] As shown in Figure 1, a slewing platform 20 is provided on the subframe in the mounting area behind the driver's cab 7 of the vehicle body 2, which is driven by a slewing motor 24 and is configured to rotate horizontally around a vertical axis. The base end of a boom 30 is attached to a support column 21 extending upward from this slewing platform 20 via a foot pin 22 so that it can swing (raise and lower) in the vertical direction. The boom 30 has a configuration in which a base boom 30a, an intermediate boom 30b, and a tip boom 30c are nested together in order from the slewing platform 20 side, and the boom 30 can be extended and lowered in the axial direction (longitudinal direction) by driving the extension and retraction of a telescopic cylinder 31 provided inside. In addition, a luffing cylinder 23 is mounted between the base boom 30a and the support column 21, and by driving the extension and retraction of this luffing cylinder 23, the entire boom 30 can be raised and lowered in the vertical plane. Furthermore, a boom support 28 is provided in the mounting area behind the driver's cab 7 of the vehicle body 2, which supports the boom 30 in the stowed position described later.

[0023] A vertical post (not shown) is pivotally supported at the tip of the tip boom 30c so as to be able to swing up and down. This vertical post is controlled to maintain a vertical position at all times, regardless of the elevation angle of the boom 30, by an upper leveling cylinder (not shown) straddling the tip of the tip boom 30c and a lower leveling cylinder 25 straddling the base boom 30a and the support column 21. A work platform 40 for worker use is attached to this vertical post via a work platform bracket (not shown). A swivel motor 34 (see Figure 3) is provided inside this work platform bracket, and by driving this swivel motor 34, the entire work platform 40 can be made to swivel (horizontally rotate) around the vertical post. Here, as described above, the vertical post is always kept in a vertical position, and as a result, the floor surface of the work platform 40 is always kept horizontal regardless of the elevation angle of the boom 30. In the aerial work platform 1, the lifting device, which serves as the work equipment, is comprised of a swivel platform 20, a boom 30, and a work platform 40.

[0024] The work platform 40 is equipped with an upper operating device 45 that includes various operating means such as operating levers, operating switches, and operating dials for operation by the worker riding on it. Therefore, the worker riding on the work platform 40 can perform various operations such as the rotation of the turntable 20 (rotation of the turntable motor 24), the luffing of the boom 30 (extension and retraction of the luffing cylinder 23), the extension and retraction of the boom 30 (extension and retraction of the extension cylinder 31), and the swivel operation of the work platform 40 (rotation of the swivel motor 34) by operating the upper operating device 45.

[0025] Next, referring mainly to Figure 3, we will describe the configuration for controlling the operation of each hydraulic actuator, including the jack cylinder 11, outrigger cylinder 12, slewing motor 24, luffing cylinder 23, telescopic cylinder 31, and swivel motor 34, based on the operation signals output by the operation of the upper operating device 45 or lower operating device 27 described above.

[0026] As shown in Figure 3, the aerial work platform 1 includes a hydraulic unit 50 that supplies hydraulic fluid to operate each of the hydraulic actuators described above, and a controller 60 that receives operation signals from the upper operating device 45 and the lower operating device 27 and controls the operation of each hydraulic actuator. The hydraulic unit 50 is configured to include a hydraulic pump 52 and a pump drive motor 53 housed in the power unit 51 shown in Figure 1, and a control valve 54 that controls the supply direction and amount of hydraulic fluid supplied from the hydraulic pump 52 to each hydraulic actuator.

[0027] The pump drive motor 53 is rotationally driven by power supplied from the power supply device 90, which operates the hydraulic pump 52 and discharges hydraulic fluid to the control valve 54. More specifically, when the power switch 8 for the bodywork unit, which is located on the vehicle (e.g., the lower operating device 27), is operated from off to on when work is to start, the controller 60 turns on the power supply for the bodywork unit, making it possible to supply power to the pump drive motor 53 from the power supply device 90. The pump drive motor 53 is then rotationally driven by the power supplied from the power supply device 90, which discharges hydraulic fluid from the hydraulic pump 52 to the control valve 54.

[0028] The control valve 54 includes an electromagnetic proportional control valve V1 corresponding to the jack cylinder 11, an electromagnetic proportional control valve V2 corresponding to the outrigger cylinder 12, an electromagnetic proportional control valve V3 corresponding to the slewing motor 24, an electromagnetic proportional control valve V4 corresponding to the luffing cylinder 23, an electromagnetic proportional control valve V5 corresponding to the telescopic cylinder 31, and an electromagnetic proportional control valve V6 corresponding to the swivel motor 34.

[0029] When an operation signal output by the operation of the upper operating device 45 or the lower operating device 27 is input to the controller 60, the controller 60 outputs a command signal corresponding to that operation signal to the control valve 54. Based on the command signal from the controller 60, the control valve 54 electromagnetically drives the spools of each electromagnetic proportional control valve V1 to V6 to control the supply direction and amount of hydraulic fluid supplied from the hydraulic pump 52 to each hydraulic actuator, and controls the operating direction and operating speed of each hydraulic actuator. As a result, the upper operating device 45 or the lower operating device 27 can perform operations such as the extension and retraction of the jack device and outrigger device, the rotation of the turntable 20, the luffing and raising of the boom 30, the extension and retraction of the boom 30, and the swiveling of the work platform 40.

[0030] The power supply device 90 is connected to the fixed battery 70, portable battery 80, normal charging outlet 15, and rapid charging outlet 16 shown in Figure 3, and supplies power from the normal charging outlet 15 and rapid charging outlet 16 to the electric motors installed on the vehicle body 2. It also supplies power from the normal charging outlet 15 and rapid charging outlet 16 to the vehicle battery (not shown) via the fixed battery 70, portable battery 80, and a DC-DC converter (not shown). The power supply device 90 outputs a DC voltage to the DC-AC inverter 93, and the DC-AC inverter 93 converts the DC voltage supplied from the power supply device 90 to AC 100V and outputs it from the service outlet 19 installed on the vehicle body 2.

[0031] Next, the configuration of the battery mounting space LS1 on which the portable battery 80 is placed will be described, mainly with reference to Figures 4 to 6. Figures 4 and 5 are diagrams of one embodiment of the battery mounting space LS1, and Figure 6 is a diagram of another embodiment of the battery mounting space LS1. The battery mounting space LS1 shown in Figure 4 has three battery mounting sections 103 that are partitioned by four partition plates 102 provided on a mounting base plate 101. The distance between adjacent partition plates 102 is slightly wider than the width of the portable battery 80, and each battery mounting section 103 is designed to accommodate the portable battery 80 in an upright position.

[0032] The portable battery 80 is constructed by housing a lithium-ion battery module (not shown) in a rectangular battery case 81 having a handle 82. Protective devices are attached to each corner of the battery case 81 to prevent damage to the battery case 81 during transport, but these are not shown in the illustration. The portable battery 80 can be placed in or removed from the battery mounting section 103 by grasping the handle 82. The portable battery 80 placed in the battery mounting section 103 is electrically connected to the power supply device 90, and power can be supplied to the electric device installed on the vehicle body 2 via the power supply device 90. The portable battery 80 removed from the battery mounting section 103 can be used, for example, as a portable emergency power source in disaster areas.

[0033] As shown in Figure 4, the mounting base plate 101 of the mounting space LS1 has holes 106 formed in it, corresponding to each battery mounting section 103, through which the tip of the battery locking member 105 (see Figure 5) protrudes or retracts. As shown in Figure 5, the battery locking member 105 is configured to swing around its base end, allowing it to lock or unlock the portable battery 80 placed in the battery mounting section 103. The battery locking member 105 is also configured to be operated by a locking device 107. The locking device 107 is configured, for example, to have an electric motor (not shown) that swings the battery locking member 105, and is configured to lock the battery locking member 105 in a state where it has locked the portable battery 80 placed in the battery mounting section 103, so that the locked state is maintained, or to unlock it to release the locked state. Furthermore, the locking device 107 is configured to be controlled by the controller 60 to enable or disable the lock (also referred to as "locking") of the battery locking member 105.

[0034] When the locking mechanism is activated, the locking device 107 locks the portable battery 80 in the battery mounting section 103 where the portable battery 80 is placed using the battery locking member 105, and locks it to maintain that locked state. At this time, the portable battery 80 cannot be removed from the battery mounting section 103. On the other hand, when the locking mechanism is deactivated, the locking of the portable battery 80 by the battery locking member 105 is released in the battery mounting section 103 where the portable battery 80 is placed, and the battery locking member 105 is retracted into the hole 106. At this time, the portable battery 80 can be removed from the battery mounting section 103. Note that whether the locking mechanism is activated or deactivated, in the battery mounting section 103 where the portable battery 80 is not placed, the locking device 107 keeps the battery locking member 105 retracted into the hole 106. Therefore, it is possible to place the portable battery 80 on the battery mounting section 103 where the portable battery 80 is not currently mounted.

[0035] The battery mounting space LS1 in another configuration shown in Figure 6 (also referred to as the "door-lock type") includes a cover member 110 that covers a portable battery 80 mounted on a mounting base plate 101. This cover member 110 has an opening 111 large enough to allow the portable battery 80 to be inserted into and removed from the cover member 110, and a cover door 112 that swings upward to open and close the opening 111 is provided in the opening 111. This cover door 112 is operated manually by an operator. The internal configuration of the cover member 110 is the same as that shown in Figure 4 (however, the battery locking member 105, hole 106, and locking device 107 described above are not included), and a detailed explanation is omitted.

[0036] The cover member 110 is provided with a cover door locking device 108. This cover door locking device 108 is configured to include a door locking member that locks the cover door 112 in the closed position, and an electromagnetic solenoid (neither shown) that operates the door locking member, and the cover door 112 The cover door locking device 108 is configured to lock the cover door 112 to maintain the closed position of the opening 111, or to unlock the cover door 112 to allow the opening 111 to be opened. The cover door locking device 108 is also configured to be controlled by the controller 60 to enable or disable the lock (also referred to as "door lock") of the cover door 112.

[0037] When the door lock is activated, the cover door lock device 108 locks the cover door 112 so that it remains closed to the opening 111. At this time, the portable battery 80 cannot be removed from any of the battery mounting sections 103 inside the cover member 110, nor can it be placed on any of the battery mounting sections 103. On the other hand, when the door lock is deactivated, the cover door lock device 108 releases the lock on the cover door 112. At this time, it becomes possible to open the cover door 112, allowing the portable battery 80 to be removed from the battery mounting section 103 on which it is placed, and to place the portable battery 80 on a battery mounting section 103 on which it is not placed. In the following description, unless otherwise specified, the locking device 107 and the cover door lock device 108 are collectively referred to as the portable battery lock device 109.

[0038] As described above, the portable battery 80 can be placed in the battery mounting space LS1 or removed from the battery mounting space LS1. However, even though it is portable, the portable battery 80 is quite heavy. Therefore, if the portable battery 80 could be removed at any time, depending on the position of the lifting device (boom 30, etc.), when the portable battery 80 is removed, the vehicle weight will decrease by the amount of the removed portable battery 80, which may worsen the center of gravity and weight balance of the aerial work platform 1 and make the aerial work platform 1 unstable. For this reason, the aerial work platform 1 has restrictions on when the lifting device can be removed, and the working range of the lifting device can be set according to the number of portable batteries 80 installed.

[0039] The following explanation will primarily refer to Figures 7 to 11 to describe the conditions under which the portable battery 80 can be removed and the settings for the working range of the lifting device. In the following explanation, the stowed position of the lifting device refers to the position shown in Figure 7 when the vehicle body 2 is lifted and supported horizontally by the front jack 10F and rear jack 10R, and the boom 30 is retracted and supported by the boom support base 28. The working position of the lifting device refers to the position shown in Figure 8 when the vehicle body 2 is lifted and supported horizontally by the front jack 10F and rear jack 10R, and the boom 30 is separated from the boom support base 28.

[0040] The aerial work platform 1 is equipped with various detection devices to detect the posture of the lifting device and the number of portable batteries 80 installed, and the detection signals output from these detection devices are input to the controller 60. For example, as shown in Figure 9, the controller 60 receives a battery installation count detection signal from the portable battery detector 120 corresponding to the number of portable batteries 80 installed in the battery installation space LS1. Also, for example, the controller 60 receives a slewing angle detection signal from the boom slewing angle sensor 121 corresponding to the slewing angle of the boom 30 (slewing platform 20), a luffing angle detection signal from the boom luffing angle sensor 122 corresponding to the luffing angle of the boom 30, an extension amount detection signal from the boom length sensor 123 corresponding to the extension amount of the boom 30, and a slewing angle detection signal from the work platform slewing angle sensor 124 corresponding to the slewing angle of the work platform 40.

[0041] For example, the controller 60 receives an overhang detection signal from the jack overhang sensor 125 corresponding to the amount of overhang of the front jack 10F and rear jack 10R to the side of the vehicle body, and the controller 60 receives an overhang detection signal from the jack ground contact sensor 126 corresponding to the amount of overhang of the front jack 10F and rear jack 1 A ground contact detection signal of 0R is input. Additionally, for example, the controller 60 receives a travel speed detection signal from the travel speed sensor 128 corresponding to the travel speed of the aerial work platform 1, and a driver cab lock detection signal from the driver cab lock sensor 129 corresponding to the locking status of the driver cab 7. Furthermore, the controller 60 receives an on / off signal from the power switch 8 of the mounting unit.

[0042] The battery count detection signal from the portable battery detector 120 indicates the number of portable batteries 80 placed in the battery placement space LS1. The swing angle detection signal from the boom swing angle sensor 121, the luffing angle detection signal from the boom luffing angle sensor 122, the extension amount detection signal from the boom length sensor 123, the swing angle detection signal from the work platform swing angle sensor 124, the extension amount detection signal from the jack extension amount sensor 125, and the ground contact detection signal from the jack ground contact sensor 126 indicate whether the lifting device is in the stowed position or the working position. The travel speed detection signal from the travel sensor 128 indicates whether the vehicle body 2 is moving or not. The driver cab lock detection signal from the driver cab lock sensor 129 indicates whether the driver cab 7 is locked or not. The on / off signal from the mounting unit power switch 8 indicates whether the mounting unit power is on or off.

[0043] As shown in Figure 9, the controller 60 includes a portable battery lock control unit 61 and a work range setting unit 63. The portable battery lock control unit 61 stores status data for determining whether to enable or disable the lock (locking lock or door lock) of the portable battery lock device 109. Based on the on / off signal from the mounting unit power switch 8 and the detection signals output from each detection device, the portable battery lock control unit 61 determines whether the situation matches the status data, and based on this determination, enables or disables the lock of the portable battery lock device 109. The work range setting unit 63 stores data for the workable range, which is defined as the area in which the tip of the boom 30 (work platform 40) can be moved without tipping the vehicle body 2. The work range setting unit 63 also stores data for the workable range corresponding to the number of portable batteries 80 installed (in this example, 0 to 3). The work range setting unit 63 reads data for the workable range corresponding to the number of portable batteries 80 installed from the data set of workable range data based on the battery number detection signal from the portable battery detector 120. The work range setting unit 63 then sets the read workable range data as the movable area of ​​the tip of the boom 30 that is permissible based on the current number of portable batteries 80 installed.

[0044] The working range (movable area) setting by the working range setting unit 63 has two processes: initial setting and resetting. Initial setting is performed at the start of work. Specifically, it is performed at the time the lifting device, which is in the stowed position, is started to operate (it is a necessary condition that the power supply of the mounting unit is turned on), based on the number of portable batteries 80 installed at that time. By performing initial setting, work can be started with the working range of the lifting device properly set according to the number of portable batteries 80 installed. Resetting may be performed when work is resumed or during work (in both cases, it is a necessary condition that the power supply of the mounting unit is turned on), if the number of portable batteries 80 installed changes. By resetting, the working range of the lifting device can be properly readjusted in response to the change in the number of portable batteries 80 installed.

[0045] Figure 10 shows whether the slot-in lock type locking mechanism is enabled or disabled under each of the following conditions: driver's cab locked, driving, storage position with the bodywork power on, storage position with the bodywork power off, working position with the bodywork power on, and working position with the bodywork power off. Figure 10 also shows whether the working range is reset under each condition. As shown in Figure 10, the slot-in lock type locking mechanism is enabled under each of the following conditions: driver's cab locked, driving, working position with the bodywork power on, and working position with the bodywork power off. When the locking mechanism is enabled, additional installation of the portable battery 80 is permitted, however, The portable battery 80 cannot be removed. In addition, the slot-in locking mechanism is invalid when the mounting unit is powered on and in the stowed position, or when the mounting unit is powered off and in the stowed position. When the locking mechanism is invalid, it becomes possible to add or remove portable batteries 80. By enabling the locking mechanism when the driver's cab is locked, it is possible to prevent theft of the portable battery 80. Also, by enabling the locking mechanism while the vehicle is in motion, it is possible to prevent the portable battery 80 from falling out while the vehicle is in motion.

[0046] Furthermore, the working range is not reset when the driver's cab is locked, when the vehicle is in motion, when the vehicle is in the stowed position with the power to the body off, or when the vehicle is in the working position with the power to the body off. However, it is reset when the vehicle is in the stowed position with the power to the body on. Also, when the vehicle is in the working position with the power to the body on, it is reset when a portable battery 80 is added.

[0047] Figure 11 shows whether the door lock of the door lock type is enabled or disabled under various conditions: when the driver's cab is locked, when the vehicle is in motion, when the vehicle is in the stowed position with the power to the bodywork unit on, when the vehicle is in the stowed position with the power to the bodywork unit off, when the vehicle is in the working position with the power to the bodywork unit on, and when the vehicle is in the working position with the power to the bodywork unit off. Figure 11 also shows whether the working range is reset under each condition. As shown in Figure 11, the door lock of the door lock type is enabled under the conditions: when the driver's cab is locked, when the vehicle is in motion, when the vehicle is in the working position with the power to the bodywork unit on, and when the vehicle is in the working position with the power to the bodywork unit off. When the lock is enabled, it is not possible to add or remove the portable battery 80. Also, the door lock of the door lock type is disabled under the conditions of when the vehicle is in the stowed position with the power to the bodywork unit on or when the vehicle is in the stowed position with the power to the bodywork unit off. When the locking mechanism is disabled, it becomes possible to add or remove the portable battery 80. Similar to the slot-in lock type, enabling the locking mechanism while the driver's cab is locked prevents the theft of the portable battery 80, and enabling the locking mechanism while the vehicle is in motion prevents the portable battery 80 from falling out during operation.

[0048] Furthermore, the resetting of the working range is not performed under the following conditions: when the driver's cab is locked, while driving, when the power to the bodywork is off and the vehicle is in the stowed position, when the power to the bodywork is on and the vehicle is in the working position, but it is performed when the power to the bodywork is on and the vehicle is in the stowed position.

[0049] As explained above, in the aerial work platform 1, when the lifting device is not in the stowed position, the removal of the portable battery 80 from the battery mounting space LS1 is restricted. Therefore, it is possible to prevent the risk of the aerial work platform 1 becoming unstable and tipping over due to the removal of the portable battery when the lifting device is in the working position, which would worsen the center of gravity and weight balance of the aerial work platform 1 during operation.

[0050] In the above-described embodiment, the removal of the portable battery is restricted when the lifting device is in the working position. However, even in the working position, if it is determined that the possibility of the vehicle's stability decreasing is minimal compared to the removal of the portable battery, the portable battery may be made removable.

[0051] In the above-described embodiment, the locking member used for the slot-in lock type locking mechanism is provided on the vehicle body side, but the locking member may also be provided on the portable battery side. Alternatively, instead of providing a mechanical locking member, the portable battery may be held in place by, for example, magnetic force.

[0052] In the embodiments described above, a truck-mounted aerial work platform was used as an example of the work machine according to the present invention, but the present invention is not limited thereto, and for example, a self-propelled aerial work platform The present invention is also applicable to work vehicles. Furthermore, the present invention may be applied to other work vehicles such as hole-digging and pole-erecting vehicles and crane vehicles. In addition, the present invention is applicable to work machinery other than mobile work vehicles, for example, work machinery that is installed at a predetermined location and operates work devices (for example, stationary aerial work machines). [Explanation of Symbols]

[0053] 1. Aerial work platform 2 car bodies 10F Front Jack 10R Rear Jack 20 Turntables 28 Boom support 30 Boom 40 workbenches 52 Hydraulic pump 60 Controllers 70 Fixed-installation batteries 80 Portable Battery 102 Partition Plate 103 Battery mounting section 105 Battery locking member 107 Locking device 108 Cover door locking device 110 Cover component 112 Cover Door

Claims

1. A work machine comprising a device support, a work device provided on the device support, and a portable battery, wherein a battery mounting section is provided on the device support on which the portable battery is removably mounted, The device has a posture detection means for detecting the posture of the work device, A work machine characterized in that, if the posture of the work device detected by the posture detection means is not the stored posture in which it is stored in the device support, the removal of the portable battery from the battery mounting section is restricted.

2. The portable battery is removablely installed in the first battery mounting portion of the device support, The work machine according to claim 1, characterized in that a fixed-installation battery is fixedly installed in the second battery mounting portion of the device support.

3. A cover member that covers a plurality of portable batteries placed on the battery mounting section and has an opening large enough to allow the portable batteries to be inserted and removed, and a door that can open and close the opening, The system includes a door locking device that can lock the door in the closed position. The work machine according to claim 1, characterized in that the door locking device is configured to restrict the removal of the portable battery covered by the cover member from the battery mounting section by locking the door section.

4. A locking member capable of securing the portable battery placed on the battery mounting section, The locking device includes the locking member capable of locking the portable battery in a locked state, The work machine according to claim 1, characterized in that the locking device is configured to restrict the removal of the portable battery, which is locked by the locking member, from the battery mounting section.

5. The work machine according to any one of claims 1 to 4, characterized in that the working range of the work device can be set according to the number of portable batteries placed on the battery mounting section.

Images