JPH074499U - Upper battery charger for aerial workers - Google Patents

Abstract

(57) [Summary] [Purpose] In a device that charges the upper battery mounted on the work platform at the tip of the boom of an aerial work vehicle, the upper charging terminal connected to the upper battery and the vehicle battery are connected. Provided is a charging device in which a lower charging terminal is connected in a retracted state of a boom to charge an upper battery and prevent a short circuit between the lower charging terminals. [Structure] A boom is mounted on a vehicle body so that the boom can be raised and lowered, and a workbench attached to the tip of the boom is provided with a battery as a power source for an operating device and the like. By connecting the lower charging terminal connected to the side power supply when storing the boom,
An upper battery charging device for an aerial work vehicle configured to charge a battery provided on a workbench is equipped with a boom non-storage detection means for detecting that the boom is not in a storage state, and the boom is stored by the detection means. When it is detected that the vehicle body side power source is not provided, the vehicle body side power source and the lower charging terminal are disconnected from each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an upper battery charger device for charging an upper battery mounted on a work platform in an aerial work vehicle having a work platform at the tip of a boom that can be raised and lowered.

[0002]

[Prior art]

 An aerial work vehicle, in which a boom that can be undulated and the like is mounted on the vehicle body, and a work platform on which an operator is to mount is attached to the tip of the boom, has been conventionally used for overhead wire work. In such an aerial work vehicle, the boom is often partially insulated and the workbench is insulated from the vehicle body in consideration of worker safety. Such an aerial work vehicle is provided with an optical communication system in the insulation section, and when an operator operates the operation device on the workbench, this operation signal is sent to the vehicle body as an optical signal to control the operation of the boom or the like. Is to be done. In this case, the workbench is equipped with a device for converting the operation of the operating device into an optical signal and transmitting it to the vehicle body side, and the upper battery that supplies electric power for operating the device is also installed on the workbench. It

Since the upper battery is mounted on a workbench that is insulated from the vehicle body side, a charging current cannot be supplied from the vehicle body side to the upper battery at least during work. For this reason, an upper charging terminal connected to this upper battery and a lower charging terminal connected to the vehicle-side power supply (vehicle-side battery or generator) are provided, and when the work is completed and the workbench is retracted, the upper and lower When the charging terminals come into contact with each other, the upper battery connected to each terminal and the vehicle body side power source are connected, and the upper battery is charged.

[0004]

[Problems to be solved by the device]

 However, the connection between the upper battery and the power supply on the vehicle body side due to the contact of this charging terminal is such that the lower charging terminal and the vehicle body side power supply are always connected even when the boom is not retracted, and the lower charging terminal is exposed. As a result, if metal such as a driver is accidentally dropped and the positive and negative terminals of the charging terminal are touched, a short circuit may occur. In view of such a problem, the present invention has an object to provide an upper battery charger for an aerial work vehicle configured to prevent a short circuit at the charging terminal when the boom is not in the retracted state. .

[0005]

[Means for solving problems]

 In order to achieve such an object, the upper battery charger of the present invention is equipped with a boom non-retraction detecting means for detecting that the boom is not in the retracted state, and it is detected by this detecting means that the boom is not retracted. It is configured by cutting off the connection between the vehicle-side power supply provided on the vehicle body side and the lower charging terminal.

[0006]

[Action]

 By the above means, when the boom is in the retracted state, the upper connection terminal and the lower connection terminal are in contact with each other, and the lower connection terminal and the vehicle body side power supply are not cut off, so the upper battery is charged by the vehicle body side power supply. When the boom is not in the retracted state, the boom connection detection switch does not energize the lower connection terminal, so a short circuit can be prevented even if the + and-terminals of the lower connection terminal are contacted.

[0007]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an aerial work vehicle equipped with an upper battery charging device according to the present invention. In this aerial work vehicle, a boom 3 is attached to a swivel base 2 which is swingably mounted on a vehicle body 1 so as to be capable of undulating and extending and contracting, and a work platform 5 is mounted on the tip of the boom 3 in a balanced state. Has been. The boom 3 is composed of a base boom 3a attached to the swivel base 2 and a tip boom 3b that is extendable and retractable with respect to the base boom 3a. The tip boom 3b is made of an insulating material such as FRP. . A boom receiver 7 is provided on the vehicle body 1 to support the boom 3 when the boom 3 and the workbench 5 are stored in the storage position (position shown by the solid line in FIG. 1). Further, jack devices 8 are attached to the front, rear, left and right of the vehicle body 1 to support the vehicle body 1 by extending it as shown in the figure during work.

In the aerial work vehicle having such a configuration, a swing motor (not shown) for swinging the swivel base 2, a hoisting cylinder 4 for hoisting the boom 3 and a telescopic cylinder (boom 3 for telescopically operating the boom 3). The work table is moved to a desired high place by the operation control of (arranged inside), and an operator on the work table 5 carries out work at high places. This operation control is performed by operating an upper operating device (not shown) provided on the vehicle body 1 side or by operating a lower operating device (not shown) provided on the workbench 5. Or

Here, since the tip boom 3b is made of an insulating material, and the workbench 5 is insulated from the vehicle body 1 side in this portion, the operation device signal of the workbench 5 is transmitted via the electric wire to the vehicle body. It cannot be configured to communicate to the side. For this reason, in this aerial work vehicle, an optical communication system using an optical fiber cable is provided in the boom 3, and the operation signal of the operation device provided on the workbench 5 is converted into an optical signal to convert the vehicle body. Then, the operation control is performed according to the operation of the operating device. For this reason, the workbench 5 is provided with a device for converting an operation signal of the operation device into an optical signal and sending the signal to the vehicle body side, and an upper battery 6 for supplying drive power to the device is further provided. .

By the way, since the upper battery 6 is insulated from the vehicle portion, the battery is consumed while it is being used, and thus needs to be charged. Therefore, the upper charging terminal 9 is provided at the tip of the boom 3 and the lower charging terminal 10 is provided on the upper surface of the vehicle body 1, and the upper charging terminal 9 and the lower charging terminal 10 are arranged to contact each other when the boom 3 is stored. An upper battery 6 is connected to the terminal 9, and a vehicle body side power source 13 such as a vehicle battery is connected to the lower charging terminal 10. Therefore, when the boom 3 is retracted, the upper battery 6 and the vehicle-side power supply 13 are connected and charging is performed. The connection terminals include a + terminal and a-terminal, and the lower connection terminal 10 is in an upward state and is exposed when the boom is not stored. For example, a metal object such as a tool is accidentally dropped, and the + terminal and the-terminal are formed. If you touch the terminal, you will short-circuit.

In the present case, a boom storage detection switch 11 is provided between the lower charging terminal 10 and the vehicle body side power source 13. When the boom 3 is retracted, the lower charging terminal 10 and the vehicle body side power source 13 are connected to each other, and When the battery pack 3 is stored, the circuit for disconnecting the lower charging terminal 10 and the vehicle body side power supply 13 is provided. Therefore, since the lower charging terminal 10 is not energized when the boom 3 is not stored, it is possible to prevent a short circuit even if the positive terminal and the negative terminal are made of metal.

[0012]

[Effect of device]

 As described above, according to the present invention, when the boom is retracted in an aerial work vehicle, the upper battery is automatically charged, and the lower charging terminal and the vehicle-side power supply are disconnected during the work. It is possible to prevent a short circuit at the charging terminal. This prevents the upper battery from discharging and hindering the next work. In addition, even during work, a metal object such as a tool is accidentally dropped, and even if it contacts the lower charging terminal, a short circuit does not occur, so that work can be performed safely.

[Brief description of drawings]

FIG. 1 is a front view of an aerial work vehicle equipped with an upper battery charging device according to the present invention.

FIG. 2 is an electric circuit diagram showing a structure of an upper battery charging device according to the present invention.

[Explanation of symbols]

 1 vehicle body 3 boom 5 workbench 6 upper battery 9 upper charging terminal 10 lower charging terminal 11 boom storage detection switch 13 vehicle side power supply

Claims (1)

[Scope of utility model registration request] 1. A boom is mounted on a vehicle body so that it can be raised and lowered, a work table attached to the tip of the boom is provided with a battery as a power source for an operating device, etc., and an upper charging terminal connected to the battery and a vehicle body side are provided. In the upper battery charger of the aerial work vehicle, the boom is retracted by connecting the lower charging terminal connected to the vehicle body side power supply when the boom is retracted to charge the battery equipped on the workbench. Boom non-retracting detection means for detecting the absence of the boom is provided, and when the detection means detects that the boom is not retracted, the connection between the vehicle body side power supply provided on the vehicle body side and the lower charging terminal is cut off. An upper battery charging device for an aerial work vehicle, which is characterized in that