Aerial work platform that can be used as both a transport and lifting machine.

Abstract

This prevents the work platform from rising when the protective fence is removed in a combined transport and lifting aerial work platform vehicle. [Solution] The aerial work platform that also serves as a transport and lifting machine according to the present invention comprises a chassis equipped with a traveling device, a control device mounted on the chassis, a work platform provided on the chassis, a lifting mechanism for raising and lowering the work platform, an operating device capable of operating the lifting mechanism, a protective fence detachably attached around the work platform, a protective fence detection means for detecting whether or not the protective fence is attached to the work platform, and a setting input unit provided on the operating device that can switch the setting of the operating mode between an aerial work platform and a transport and lifting machine, wherein the control device controls the work platform to be unable to be raised when the operating mode is set to an aerial work platform based on the operation of the setting input unit and the protective fence detection means determines that the protective fence is not attached to the work platform.

Description

Technical Field

[0001] The present invention relates to an aerial work vehicle combined with a carrier crane, which enables a protective fence surrounding a liftable work floor of the aerial work vehicle to be detachably attached, allows the protective fence to be removed and the vehicle to be used as a carrier crane, and prevents the vehicle from being used as an aerial work vehicle with the protective fence removed.

Background Art

[0002] Conventionally, an aerial work vehicle combined with a carrier crane has been proposed, which has a work floor (deck) on which workers performing aerial work can ride and move up and down, and can be used as a carrier crane.

[0003] In Patent Document 1 listed below, as shown in FIG. 15, in a mast-type aerial work vehicle, a protective fence 102 surrounding the space above a liftable work floor 101 is detachably attached. By removing the protective fence (refer to the two-dot chain line in the figure), an aerial work vehicle combined with a carrier crane 100 is disclosed, which can use the work floor 101 as a loading platform and be used as a carrier crane.

[0004] In Patent Document 2 listed below, as shown in FIG. 16, in a mast-type aerial work vehicle, when used as an aerial work vehicle, a lifting mast 210 for an aerial work vehicle having a work floor 211 surrounded by a protective fence 212 is attached to a traveling carriage 201. When used as a carrier crane, a lifting mast 220 for a hoisting operation having a loading platform 221 without a protective fence is attached to the traveling carriage 201 and can be operated. An aerial work vehicle combined with a carrier crane 200 is disclosed.

[0005] As shown in Figure 17, Patent Document 3, a high-altitude work vehicle, has a protective fence 320 surrounding the work platform 310, which is the scaffolding for workers, which comprises a support member 321 that is pivotably provided so as to be able to transition from an upright state to a suspended state on three of the four sides of the work platform 310, an auxiliary floor member 322 that is pivotably attached to the tip of the support member 321, and an auxiliary handrail member 323 that is pivotably attached to the tip of the auxiliary floor member 322. The invention discloses a combined transport and lifting vehicle, a high-altitude work vehicle 300, which is configured such that by deploying the protective fence 320, that is, by lowering the support member 321 from an upright state (the part shown by the dashed line in the figure) to a suspended state and sequentially deploying the auxiliary floor member 322 and the auxiliary handrail member 323 (the part shown by the solid line in the figure), the auxiliary floor member 322 spreads out around the lower periphery of the work platform 310, becoming a platform for workers, and by using the work platform 310 as a loading platform in this state, it can be used as a transport and lifting vehicle.

[0006] Patent Document 4, shown below, discloses a high-altitude work vehicle 400 that is a combination of a transport and lifting machine, comprising a forklift 410 and a basket 420 for a high-altitude work vehicle, which is made up of a work platform 421 and a protective fence 422 surrounding the work platform 421 and is inserted through the forks of the forklift 410, as shown in Figure 18, wherein the basket 420 for the high-altitude work vehicle can be used as a transport and lifting machine by replacing it with a pallet (cargo bed; not shown). [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Utility Model Publication No. 6-63593 [Patent Document 2] Japanese Utility Model Publication No. 6-63592 [Patent Document 3] Japanese Utility Model Publication No. 5-51887 [Patent Document 4] Japanese Patent Publication No. 2006-256810 [Overview of the project] [Problems that the invention aims to solve]

[0008] In the case of aerial work platforms, Article 23 of the Aerial Work Platform Structure Standards stipulates that protective fences (enclosures or handrails) must be installed around the work platform of the aerial work platform. Naturally, working at heights without protective fences poses a safety problem, as workers may fall from the elevated work platform, i.e., from the height.

[0009] In this regard, the transport and lifting machine combined aerial work platform 100 of Patent Document 1 does not have a function to prevent workers from riding on the work platform 101 with the protective fence 102 removed and raising the work platform 101 to operate it as an aerial work platform.

[0010] Furthermore, the combined transport and lifting aerial work platform 200 described in Patent Document 2 does not have a function to prevent workers from riding on the platform 221, which does not have a protective fence, and raising the platform 221 to operate it as an aerial work platform, even though the lifting mast 220 for lifting work is attached to the traveling chassis 201.

[0011] Furthermore, the combined transport and lifting vehicle 300 of Patent Document 3 does not have a function to prevent the work platform 310 from rising while a worker is on it when the protective fence 320 is deployed to form a scaffolding with an auxiliary floor 322 on the lower periphery of the work platform 310 and the work platform 310 is used as a loading platform.

[0012] Furthermore, the transport and lifting machine combined aerial work platform 400 of Patent Document 4 does not have a function to prevent a worker from riding on the pallet (not shown) inserted through the forks instead of the aerial work platform basket 420, and raising the pallet to operate it as an aerial work platform.

[0013] As described above, the conventional transport and lifting combined aerial work platforms 100, 200, 300, and 400 lack safety features to prevent workers from riding on the work platform or loading platform, which are not equipped with protective fences, and from raising the work platform or loading platform to operate them as aerial work platforms. This poses a risk of workers falling from heights and also violates the structural standards for aerial work platforms.

[0014] Therefore, the present invention has been made in view of the safety shortcomings of the conventional technology described above and the need to comply with the structural standards for aerial work platforms, and aims to prevent the work platform from rising when the protective fence is removed when using an aerial work platform that also serves as a transport and lifting machine. [Means for solving the problem]

[0015] The means for solving the problem are described below, along with the reference numerals used in the embodiments for carrying out the invention. These reference numerals are included to clarify the correspondence between the claims and the descriptions of the embodiments for carrying out the invention, and needless to say, they are not used restrictively to interpret the technical scope of the present invention.

[0016] To achieve the above objective, the transport and lifting machine combined aerial work platform 1 of the present invention comprises a chassis 2 equipped with a traveling device 3, a control device 40 mounted on the chassis 2, a work platform 10 provided on the chassis 2, a lifting mechanism 4 for raising and lowering the work platform 10, an operating device 51 capable of operating the lifting mechanism 4, a protective fence 20 detachably attached around the work platform 10, a protective fence detection means 30 for detecting whether or not the protective fence 20 is attached to the work platform 10, and a setting input unit 50 provided on the operating device 51 that can switch the setting of the operating mode between an aerial work platform and a transport and lifting machine, The control device 40 is characterized in that, when the operating mode is set to a high-altitude work vehicle based on the input operation at the setting input unit 50, and when the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10, it controls the lifting mechanism 4 to be unable to rise (Claim 1).

[0017] Furthermore, the operating device 51 includes a lower operating panel 60, a wired remote control 70, or a wireless remote control 75, which are disposed on the chassis 2, and the setting input unit 50 can be selectively disposed on the lower operating panel 60 or on the wired remote control 70 or the wireless remote control 75 (Claim 2).

[0018] Furthermore, the above-mentioned transport and lifting machine combined aerial work platform 1 may require the input of a password when switching between the aerial work platform and the transport and lifting machine in the setting input unit 50 (Claim 3).

[0019] Furthermore, the transport and lifting machine combined aerial work platform 1 of the present invention comprises a chassis 2 equipped with a traveling device 3, a control device 40 mounted on the chassis 2, a work platform 10 provided on the chassis 2, a lifting mechanism 4 for raising and lowering the work platform 10, a protective fence 20 detachably attached around the work platform 10, a protective fence detection means 30 for detecting whether or not the protective fence 20 is attached to the work platform 10, a wired remote control 70 capable of operating the lifting mechanism 4, an upper connector 80 provided on the work platform 10 and connectable to the wired remote control 70, and a lower connector 81 provided on the chassis 2 and connectable to the wired remote control 70. By plugging the wired remote control 70 into the upper connector 80 or the lower connector 81, the operating mode is switched to either a high-altitude work vehicle or a lifting and transporting machine. The control device 40 may also be characterized in that, when the operating mode is set to that of an aerial work platform based on the wired remote control 70 being connected to the upper connector 80, and when it is determined that the protective fence 20 is not attached to the work platform 10 based on the detection result of the protective fence detection means 30, it controls the lifting mechanism 4 to be unable to rise (Claim 4).

[0020] Furthermore, the aerial work platform and crane combination vehicle 1 of the present invention includes a vehicle body 2 equipped with a traveling device 3, a control device 40 mounted on the vehicle body 2, a work floor 10 provided on the vehicle body 2, a lifting mechanism 4 for raising and lowering the work floor 10, an operating device 51 capable of operating the lifting mechanism 4, a protective fence 20 detachably attached around the work floor 10, a protective fence detection means 30 for detecting whether the protective fence 20 is attached to the work floor 10, a setting input section 50 provided on the operating device 51 for switching and inputting the operation mode to an aerial work platform or a crane, a wired remote control 70 which is the operating device 51, an upper connector 80 provided on the work floor 10 and connectable to the wired remote control 70, and a lower connector 81 provided on the vehicle body 2 and connectable to the wired remote control 70. The control device 40 may be characterized in that, when the operation mode is set as an aerial work platform based on an input operation at the setting input section 50 and / or when the wired remote control 70 is connected to the upper connector 80, and when it is determined based on the detection result of the protective fence detection means 30 that the protective fence 20 is not attached to the work floor 10, the lifting mechanism 4 is controlled so as not to be able to rise (Claim 5).

[0021] In addition, the aerial work platform and crane combination vehicle 1 may be configured to require input of a password when switching and inputting between an aerial work platform and a crane at the setting input section 50 (Claim 6).

Advantages of the Invention

[0022] When the operation mode of the aerial work platform and crane combination vehicle 1 of the present invention is set as an aerial work platform, since the work floor 10 can be controlled not to rise in the state where the protective fence 20 is not attached, it is possible to prevent the worker from falling and ensure safety, and at the same time, comply with the aerial work platform structure specifications.

[0023] In addition, by requiring the input of a password during the input operation of the setting input unit 50, the operation of switching the setting of the operation mode of the aerial work platform and crane integrated vehicle 1 can be limited to those who know the password (for example, rental companies or mechanics who rent out the aerial work platform and crane integrated vehicle 1), thereby preventing workers from inadvertently switching the operation mode setting and operating it.

[0024] In addition, for the aerial work platform and crane integrated vehicle 1 of the present invention, in a form where the operation mode can be switched between the aerial work platform and the crane by replacing the wired remote controller 70 with the upper connector 80 or the lower connector 81 instead of operating the setting input unit 50, structurally, when operating as an aerial work platform, it is easier for the worker boarding the work floor 10 to operate the wired remote controller by connecting the wired remote controller 70 to the upper connector 80. However, when the wired remote controller 70 is connected to the upper connector 80 and the protective fence 20 is not installed, the ascent of the work floor 10 is restricted. Therefore, when a worker boards the work floor 10 without the protective fence 20 installed, the ascent of the work floor 10 can be effectively prevented to ensure safety, and the structural specifications of the aerial work platform can be complied with.

[0025] In addition, for the aerial work platform and crane integrated vehicle 1 of the present invention, in a form including the setting input unit 50, the wired remote controller 70, the upper connector 80, and the lower connector 81, since the number of patterns for controlling the work floor 10 to be unable to ascend increases as described later, it can be used more safely.

Brief Description of the Drawings

[0026] [Figure 1] An overall perspective view of the aerial work platform and crane integrated vehicle 1 of the first embodiment. [Figure 2] A view showing the state where the protective fence 20 of the aerial work platform and crane integrated vehicle 1 in FIG. 1 is removed. [Figure 3] A view for explaining the structure of the protective fence 20 of the aerial work platform and crane integrated vehicle 1 in FIG. 1. [Figure 4](a) is a diagram illustrating the installation location of the protective fence detection means (limit switch) 30 provided in the transport and lifting machine / high-altitude work vehicle 1 shown in Figure 1, and (b) is an overall view of the protective fence detection means (limit switch) 30 shown in (a). [Figure 5] Functional block diagram of the first embodiment of the transport and lifting machine / aerial work platform 1. [Figure 6] (a) is a diagram showing the lower control panel 60, which functions as a setting input unit 50 for the transport and lifting machine / high-altitude work vehicle 1 in Figure 1, installed on the chassis 2, and (b) is an overall view of the lower control panel 60 in (a). [Figure 7] Figure 1 shows the combined transport and lifting aerial work platform 1 in the state where the operating mode is set to aerial work platform and the work platform 10 is raised. [Figure 8] Figure 1 shows the transport / lifting combined aerial work platform 1 in the state where the operating mode is set to transport / lifting and the work platform 10 (equipped with protective fence 20) is raised. [Figure 9] Figure 1 shows the transport / lifting combined aerial work platform 1 in the state where the operating mode is set to transport / lifting and the work platform 10 (without protective fence 20 attached) is raised. [Figure 10] A diagram illustrating an example of use of the transport and lifting machine / aerial work platform 1 of the first embodiment. [Figure 11] This figure shows the wired remote control 70 of the transport and lifting machine / aerial work platform 1 of the second embodiment connected to the upper connector 80. [Figure 12] This figure shows the wired remote control 70 of the transport and lifting machine / aerial work platform 1 of the second embodiment connected to the lower connector 81. [Figure 13] This diagram illustrates how, in the second embodiment of the transport and lifting machine / aerial work platform 1, when the operating mode is set to aerial work platform, the work platform 10 without a protective fence 20 is controlled to be unable to be raised. [Figure 14] This figure shows the state in which the transport / lifting machine combined aerial work platform 1 of the second embodiment is set to transport / lifting mode and the work platform 10 (without protective fence 20 attached) is raised. [Figure 15] An overall view showing the conventional 100-type aerial work platform that also serves as a transport and lifting machine. [Figure 16]An overall view showing the 200 series of other conventional transport and lifting equipment / aerial work platforms. [Figure 17] An overall view showing the 300, another conventional transport and lifting machine / aerial work platform. [Figure 18] An overall view showing the 400, another conventional transport and lifting machine / aerial work platform. [Modes for carrying out the invention]

[0027] Hereinafter, a first embodiment of the transport and lifting machine combined with aerial work platform of the present invention will be described with reference to the attached drawings.

[0028] In Figure 1, reference numeral 1 denotes a transport and lifting machine combined with an aerial work platform. This transport and lifting machine combined with an aerial work platform 1 comprises a chassis 2 equipped with a running device 3 (in the illustrated example, a running device) such as wheels or tracks on both sides in the width direction, a drive source (not shown) such as a motor or engine for driving the running device 3, and a power battery (not shown), etc., on the chassis 2, a lifting mechanism 4 consisting of a scissor link and a hydraulic mechanism for operating the scissor link, etc., a work platform 10 that is raised and lowered by the lifting mechanism, and a control device (not shown) 40 which is a main controller mounted on the chassis 2 and controls the operation of each part.

[0029] Furthermore, the work platform 10 is equipped with a protective fence 20 that surrounds the work platform 10 and is detachably attached to the work platform 10. When the combined transport and lifting aerial work platform 1 is operated as an aerial work platform, the protective fence 20 is attached to the work platform 10, which serves as a platform for workers, as shown in Figure 1, to prevent workers from falling. On the other hand, when it is operated as a transport and lifting machine, the protective fence 20 can be removed and the work platform 10 can be used as a loading platform, as shown in Figure 2.

[0030] In this embodiment, as shown in Figure 3, the protective fence 20 is formed by installing a flat base plate 21b at the bottom of a frame 21a, which is made by bending a single pipe into a U-shape to have two legs 21d, and installing a pipe-shaped crossbar 21c in the middle. This fence body 21 is installed on three sides of the rectangular work platform 10, excluding the rear side, namely the front, right, and left sides. Above the rear side of the work platform 10 where the fence body 21 is not installed, a pipe-shaped support bar 22, a pipe-shaped crossbar 23, and a flat base plate 24 are installed in order from top to bottom, detachably connected between the rear legs 21d of the fence body 21 installed on the left and right sides of the work platform 10.

[0031] Furthermore, the protective fence 20 is not limited to the structure of this embodiment described above, and is not particularly limited as long as it does not violate the standards for the structure of aerial work platforms, for example, by using a chain instead of a pipe-shaped horizontal bar 21c.

[0032] Furthermore, as shown in Figure 3, insertion holes 11 are provided at the four corners of the floor surface of the work platform 10, into which each leg 21d of each fence body 21 can be detachably inserted.

[0033] Furthermore, the combined transport and lifting aerial work platform 1 is equipped with a protective fence detection means 30 that detects whether or not the protective fence 20 is attached to the work platform 10.

[0034] In this embodiment, as shown in Figure 4(b), a limit switch 30 equipped with an actuator unit 31 connected to a contactor is used as the protective fence detection means 30, and as shown in Figure 4(a), the limit switch 30 is installed on the work platform 10 such that the legs 21d of each fence body 21 come into contact with the actuator unit 31 when the legs 21d of each fence body 21 are inserted into the insertion holes 11.

[0035] Furthermore, in this embodiment, three limit switches 30 are provided on the work platform 10 to detect the insertion of one of the two legs 21d of the three fence bodies 21 (all three limit switches 30 are not shown in Figure 4(a)).

[0036] The control device 40 determines whether the protective fence 20 is installed on the work platform 10 based on the detection results from the protective fence detection means 30. In this embodiment, the limit switch 30 is set to transmit a detection signal to the control device 40 when its actuator 31 comes into contact with the leg portion 21d of the fence body 21 (limit switch 30 is ON), and not transmit a detection signal to the control device 40 when the protective fence 20 is not installed (limit switch 30 is OFF).

[0037] Thus, the protective fence detection means 30 (limit switch 30) can detect information regarding whether or not the protective fence 20 is attached to the work platform 10. In this invention, the protective fence detection means 30 is not limited to a limit switch, but may be an optical sensor or the like.

[0038] Next, the control device 40 consists of a microcontroller and the like, and as shown in Figure 5, when it receives an operation command input via the lower control panel 60 installed on the chassis 2, for example, it can control the operation of a control valve (not shown) and a hydraulic pump (not shown) that control the supply and discharge of hydraulic fluid to, for example, a hydraulic cylinder (not shown) installed on the lifting mechanism 4, thereby controlling the lifting and lowering operation of the work platform 10 by the lifting mechanism 4. Furthermore, when the control device 40 receives an operation command input via a wired remote control 70 or a wireless remote control 75 that can be remotely operated, it can control the driving motor and steering device installed on the chassis 2 in accordance with the input operation command, thereby controlling the driving and steering of the chassis 2, as well as controlling the lifting and lowering operation as described above.

[0039] Furthermore, the combined transport and lifting aerial work platform 1 of this embodiment has a setting input unit 50 that allows input for switching the operating mode between an aerial work platform and a transport and lifting machine.

[0040] The setting input unit 50 is composed of, for example, a push button, key, switch, touch panel, etc. Alternatively, the setting input unit 50 may be placed on a lower control panel 60 (see Figure 6(a)) provided on the chassis 2 of the transport and lifting machine / high-altitude work vehicle 1, so that the lower control panel 60 functions as the setting input unit 50, and settings can be input by operating a push button (see Figure 6(b)) provided on the lower control panel 60. In addition, the setting input unit 50 can be provided separately on a wired remote control 70 or a wireless remote control 75, for example. Thus, the setting input unit 50 is provided on an operating device 51 that can operate the lifting mechanism 4, such as the lower control panel 60, wired remote control 70 or wireless remote control 75 (see Figure 5. In the example in Figure 5, the setting input unit 50 is provided on the lower control panel 60).

[0041] As described above, workers can switch the operating mode of the combined transport / lifting machine / aerial work platform 1 by operating the setting input unit 50. However, it is also possible to require a password when operating the setting input unit 50 to switch the settings, and to prevent switching the operating mode of the combined transport / lifting machine / aerial work platform 1 without entering the password. This allows limiting who can operate the combined transport / lifting machine / aerial work platform 1 to those who know the password.

[0042] Based on the input operation at the setting input unit 50 described above, the control device 40 sets the operating mode of the combined transport and lifting aerial work platform 1 to either an aerial work platform or a transport and lifting device.

[0043] Furthermore, the control device 40 can control the work platform 10 to prevent it from rising if the operating mode is set as an aerial work platform based on the input result at the setting input unit 50, and the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10, that is, in this embodiment, if even one of the three limit switches 30 detects that the protective fence 20 is not attached.

[0044] As a result, when the combined transport and lifting aerial work platform 1 is operated as an aerial work platform, the work platform 10 cannot be raised unless a protective fence 20 is attached to it. This prevents workers from accidentally falling from the work platform 10 at high altitudes and ensures compliance with the aerial work platform structural standards.

[0045] On the other hand, when the control device 40 sets the operating mode to a high-altitude work vehicle based on the input result at the setting input unit 50, and the protective fence detection means 30 detects that the protective fence 20 is attached to the work platform 10, that is, in this embodiment, when the attachment of the protective fence 20 is detected at all three of the three limit switches 30, the control device 40 can control the work platform 10 to be raised as shown in Figure 7.

[0046] Furthermore, if the control device 40 has set the operating mode to a transport and lifting machine based on the input result from the setting input unit 50, it can control the work platform 10 to be raised, as shown in Figure 8 (with the protective fence 20 attached) and Figure 9 (with the protective fence 20 not attached), regardless of whether the protective fence detection means 30 detects whether the protective fence 20 is attached to the work platform 10 or not.

[0047] In this embodiment, the cases in which the control device 40 prevents the work platform 10 from being raised and the cases in which it becomes possible to raise are summarized in Table 1 below.

[0048] [Table 1]

[0049] Furthermore, as an example of how to use the combined transport and lifting aerial work platform 1 of this embodiment, for example, as shown in Figure 10, two combined transport and lifting aerial work platforms 1 of this embodiment may be prepared. The operation mode of the first combined transport and lifting aerial work platform (reference numeral 1 in the figure) is set to aerial work platform, and a worker is placed on the work platform 10 fitted with a protective fence 20. The worker holds the wireless remote control 75 of the second combined transport and lifting aerial work platform (reference numeral 1' in the figure). The operation mode of the second combined transport and lifting aerial work platform 1' may be set to transport and lifting, and cargo A is placed on the work platform 10' which is not fitted with a protective fence 20' (not shown). The worker operates the wireless remote control 75 on the work platform 10 of the first combined transport and lifting aerial work platform 1 to remotely control the second combined transport and lifting aerial work platform 1'. Furthermore, in the usage method shown in Figure 10 above, the first transport / lifting machine / aerial work platform 1 on which the worker rides may be used in place of a conventional aerial work platform.

[0050] Next, a second embodiment of the present invention will be described. In this embodiment, the transport and lifting machine combined aerial work platform 1 is the same as the configuration of the first embodiment described with reference to Figures 1 to 10, except for the configuration described below, so the description will be omitted. Also, parts corresponding to those in the first embodiment will be denoted by the same reference numerals.

[0051] The transport and lifting machine combined aerial work platform 1 of this embodiment does not have the setting input unit 50 described above, but instead has a wired remote control 70 that enables the raising and lowering operation of the work platform 10, an upper connector 80 (see Figure 11) provided on the work platform 10 and connectable to the wired remote control 70, and a lower connector 81 (see Figure 12) provided on the chassis 2 and connectable to the wired remote control 70.

[0052] The control device 40 in this embodiment then determines whether the wired remote control 70 is connected to either the upper connector 80 or the lower connector 81 and powered on. If the wired remote control 70 is connected to the upper connector 80, the control device 40 sets the operating mode of the combined transport and lifting aerial work platform 1 to aerial work platform mode. On the other hand, if the wired remote control 70 is connected to the lower connector 81, the control device 40 sets the operating mode of the combined transport and lifting aerial work platform 1 to transport and lifting mode.

[0053] Thus, in this embodiment, instead of the switching operation by the setting input unit 50 described above, the operating mode can be switched to either an aerial work platform or a transport / lifting machine by plugging the wired remote control 70 into the upper connector 80 or the lower connector 81, and the setting input unit 50 can be omitted.

[0054] Furthermore, the control device 40 controls the work platform 10 to be unable to rise when the wired remote control 70 is connected to the upper connector 80 and the operating mode is set to a high-altitude work vehicle, and the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10.

[0055] In this embodiment, when the combined transport and lifting aerial work platform 1 is operated as an aerial work platform, due to the structure described above, it is easier for a worker on the work platform 10 to operate the wired remote control 70 on the work platform 10 if the wired remote control 70 is connected to the upper connector 80. In the case where the protective fence 20 is not installed with the wired remote control 70 connected to the upper connector 80 as shown in Figure 13, the rise of the work platform 10 is prevented. This effectively prevents the work platform 10 from rising when a worker is on the work platform 10 without the protective fence 20 installed, thereby ensuring safety and complying with the aerial work platform structural standards.

[0056] On the other hand, when the wired remote control 70 is connected to the upper connector 80 and the operating mode is set to a high-altitude work vehicle, and the protective fence detection means 30 detects that the protective fence 20 has been attached to the work platform 10, that is, in this embodiment, when all three of the three limit switches 30 detect that the protective fence 20 has been attached, the control device 40 can control the work platform 10 to be raised as shown in Figure 11.

[0057] Furthermore, when the wired remote control 70 is connected to the lower connector 81 and the operating mode is set to a transport and lifting machine, the control device 40 can control the work platform 10 to be raised, as shown in Figure 12 (with the protective fence 20 attached) and Figure 14 (with the protective fence 20 not attached), regardless of whether the protective fence detection means 30 detects whether the protective fence 20 is attached to the work platform 10 or not.

[0058] As described above, in the combined transport and lifting aerial work platform 1 of this embodiment, when the protective fence 20 is not installed, the wired remote control 70 is connected to the lower connector 81, that is, the worker can operate the wired remote control 70 connected to the lower connector 81 without boarding the work platform 10 to raise the work platform 10 for use as a transport and lifting machine.

[0059] In this embodiment, the cases in which the control device 40 prevents the work platform 10 from being raised and the cases in which it becomes possible to raise are summarized in Table 2 below.

[0060] [Table 2]

[0061] Next, a third embodiment of the present invention will be described. In this embodiment, the transport and lifting machine combined aerial work platform 1 is the same as the configuration of the first or second embodiment described with reference to Figures 1 to 14, except for the configuration described below, so the description will be omitted. Also, parts corresponding to the first or second embodiment will be denoted by the same reference numerals.

[0062] The transport and lifting machine combined aerial work platform 1 of this embodiment is equipped with the above-described setting input unit 50, a wired remote control 70 that enables the raising and lowering of the work platform 10, an upper connector 80 provided on the work platform 10 and connectable to the wired remote control 70, and a lower connector 81 provided on the chassis 2 and connectable to the wired remote control 70.

[0063] In this embodiment as well, the control device 40 determines whether the wired remote control 70 is connected to either the upper connector 80 or the lower connector 81 and is receiving power.

[0064] In this embodiment, the case in which the work platform 10 becomes unable to be raised by the control device 40 will be explained as follows: First, the control device 40 sets the operating mode as an aerial work platform based on the operation of the setting input unit 50, and when the wired remote control 70 is connected to the upper connector 80, if the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10, it controls the work platform 10 to be unable to be raised.

[0065] Furthermore, the control device 40 sets the operating mode as an aerial work platform based on the operation of the setting input unit 50, and when the wired remote control 70 is connected to the lower connector 81, if the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10, it controls the work platform 10 so that it cannot be raised.

[0066] Finally, the control device 40 sets the operating mode to transport and lifting machine based on the operation of the setting input unit 50, and when the wired remote control 70 is connected to the upper connector 80, if the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10, it controls the work platform 10 so that it cannot be raised.

[0067] To summarize the cases in this embodiment described above in which the control device 40 prevents the work platform 10 from being raised, the control device 40 sets the operating mode to that of an aerial work platform based on the operation of the setting input unit 50 and / or when the wired remote control 70 is connected to the upper connector 80, and the protective fence detection means 30 detects that the protective fence 20 is not attached to the work platform 10, then controls the work platform 10 to prevent it from being raised.

[0068] Thus, in this embodiment, the number of cases in which the work platform 10 is controlled to be unable to rise increases, making it possible to effectively prevent the work platform 10 from rising while a worker is standing on it without the protective fence 20 installed.

[0069] In this embodiment, the cases in which the control device 40 prevents the work platform 10 from being raised and the cases in which it becomes possible to raise are summarized in Table 3 below.

[0070] [Table 3] [Explanation of Symbols]

[0071] 1(1') Aerial work platform with transport and lifting capabilities 2 chassis 3. Traveling device 4. Lifting mechanism 10 (10') Work platform 11 Insertion hole 20(20') Guard fence 21 Fence body 21a Frame 21b Baseplate 21c horizontal bar 21d Legs 22 Erection bars 23 horizontal bars 24 base plate 30. Protective fence detection means (limit switch) 31 Actuator section 40 Control device 50 Setting Input Section 51 Operating device 60 Lower control panel 70 Wired Remote Control 75 Wireless remote control 80 Upper connector 81 Lower connector 100 Combined transport and lifting equipment for high-altitude work vehicles 101 Work platform 102 Protective fence 200 Combined transport and lifting equipment for high-altitude work vehicles 201 Bogie 210 Lifting mast for aerial work platform 211 Work platform 212 Protective fence 220 Lifting mast for lifting operations 221 Cargo bed 222 Protective fence 300 Combined transport and lifting equipment for high-altitude work vehicles 310 Work platform 320 Protective fence 321 Support member 322 Auxiliary floor member 323 Auxiliary handrail component 400 Combined transport and lifting equipment for high-altitude work. 410 Forklift 420 Basket for aerial work platform 421 Work platform 422 Protective fence A luggage

Claims

1. A chassis equipped with a running gear, a control device mounted on the chassis, a work platform provided on the chassis, a lifting mechanism for raising and lowering the work platform, an operating device capable of operating the lifting mechanism, and a protective fence detachably attached around the work platform, A protective fence detection means for detecting whether or not the protective fence is attached to the work platform, The aforementioned operating device is provided with a setting input unit that allows switching the setting of the operating mode to either a high-altitude work vehicle or a transport and lifting machine, The above-mentioned control device controls the lifting mechanism to prevent it from rising when the operating mode is set as an aerial work platform based on the input operation at the setting input unit, and when the protective fence detection means detects that the protective fence is not attached to the work platform based on the detection result.

2. The operating device includes a lower control panel, a wired remote control, or a wireless remote control, and the setting input unit is selectively provided on the lower control panel and on the wired remote control or the wireless remote control, as described in claim 1.

3. The aerial work platform that also functions as a transport / lifting machine according to claim 1 or 2, characterized in that a password is required when switching to aerial work platform or transport / lifting machine in the setting input unit.

4. A chassis equipped with a running gear, a control device mounted on the chassis, a work platform provided on the chassis, a lifting mechanism for raising and lowering the work platform, and a protective fence detachably attached around the work platform, A protective fence detection means for detecting whether or not the protective fence is attached to the work platform, A wired remote control capable of operating the aforementioned lifting mechanism, An upper connector provided on the work platform and connectable to the wired remote control, The chassis is provided with a lower connector that can be connected to the wired remote control, By plugging the aforementioned wired remote control into either the upper or lower connector, the operating mode is switched to either a high-altitude work vehicle or a lifting and transporting machine. The above-mentioned control device controls the lifting mechanism to prevent it from rising when the operating mode is set to that of an aerial work platform based on the wired remote control being connected to the upper connector, and when the protective fence detection means detects that the protective fence is not attached to the work platform.

5. A chassis equipped with a running gear, a control device mounted on the chassis, a work platform provided on the chassis, a lifting mechanism for raising and lowering the work platform, an operating device capable of operating the lifting mechanism, and a protective fence detachably attached around the work platform, A protective fence detection means for detecting whether or not the protective fence is attached to the work platform, The aforementioned operating device includes a setting input unit that allows switching the setting of the operating mode to either a high-altitude work vehicle or a transport and lifting machine, The aforementioned operating device is a wired remote control, An upper connector provided on the work platform and connectable to the wired remote control, The chassis is provided with a lower connector that can be connected to the wired remote control, The control device is characterized in that, when the operating mode is set as an aerial work platform based on the input operation at the setting input unit and / or when the wired remote control is connected to the upper connector and the protective fence detection means detects that the protective fence is not attached to the work platform, the lifting mechanism is controlled to be unable to be raised.

6. The aerial work platform that also functions as a transport / lifting machine according to claim 5, characterized in that a password is required when switching to aerial work platform or transport / lifting machine in the setting input unit.

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