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Industrial truck with limit switch assembly

A technology of transport vehicles and limit switches, which is applied in the direction of lifting devices, lifting equipment safety devices, etc., and can solve the problems of lowering the function of forks and additional functions of column translation

Active Publication Date: 2012-10-31
JUNGHEINRICH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the crane is not fully advanced and the fork is below a safe height, the known limit switch device locks further reducing the function of the fork, column translation, side feed and hydraulic additional functions, such as lateral Fork adjustment

Method used

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  • Industrial truck with limit switch assembly
  • Industrial truck with limit switch assembly
  • Industrial truck with limit switch assembly

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] figure 1 The reach truck 10 is shown in a perspective view, the right front wheel 11 being visible. The reach truck 10 has a lifting frame 12 with two extendable column sections 13 (not shown). Furthermore, a carrying device 14 is mounted on the lifting frame 12 , said carrying device being adjustable in its height on the lifting frame 12 . Described carrying device 14 has two goods fork tines 16 that are arranged parallel to each other, and these two goods fork tines are in figure 1 The middle falls on the outside of the wheel support arm 18 . The carrier device 14 is designed as a tine adjustment device 20 which allows individual lateral adjustment of the tines 16 so that they can be positioned on the inside of the wheel support arm 18 or the wheel support arm, for example. The outer side of the 18 is lowered. The adjustment of the fork tines into their lateral position makes it possible to accommodate long objects during transport and support them by the correspo...

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PUM

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Abstract

An industrial truck comprises a pair of wheel supporting arms protruding in longitudinal direction, a lift frame movable in longitudinal direction, a load tine adjusting device and a pair of load tines, the load tines capable of being adjusted together along the lift frame in the height direction and being adjusted independently in the direction transverse to the longitudinal direction. A limit switch assembly is provided with a control device for preventing collision between the load tines and the wheel supporting arms. The limit switch system is provided with a height sensor for at least one load tine, the height sensor used for detecting a shortfall of a predetermined minimum height, and a plurality of sensors used for detecting positions of the load tines relative to the wheel supporting wheels. The control unit of the limit switch system blocks the functions for movement of the load tines in a non-extended position of the lift frame when the predetermined minimum height falls short, and release the falling function of the load tines of reaching the height lower than the minimum height when the load tines are detected to be located at lateral positions of the wheel supporting arms.

Description

technical field [0001] The invention relates to a ground transportation vehicle having a pair of wheel support arms protruding in the longitudinal direction, a lifting frame movable in the longitudinal direction, a fork adjustment device and a pair of fork tines, each fork tine in its It is adjustable in height along the crane and individually transversely to the longitudinal direction. The invention relates in particular to a reach lift truck which is equipped with a fork adjustment device for lateral adjustment of the individual fork tines. Background technique [0002] It is known for limit switch arrangements to detect the center position of the fork carrier and the safety height of the fork for a lateral slide arranged on the column. Known limit switch arrangements allow, in principle, the raising and tilting of the forks, but shut down all other hydraulic functions when the fork carriage falls below a safety height of 500 to 600 mm. If the column is further moved for...

Claims

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Application Information

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IPC IPC(8): B66F9/24B66F17/00
CPCB66F9/14B66F17/003B66F9/0755
Inventor U・阿勒丁M・迪韦尔C・厄斯特曼
Owner JUNGHEINRICH AG
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