JPH0569083U - Assembly structure of controller in forklift - Google Patents

Abstract

(57) [Summary] [Purpose] To protect the controller of an electronically controlled forklift from water and dust. [Structure] A cross member 22 constituting a frame of a forklift truck has a closed cross-sectional shape, and a controller 27 is attached to a wall 22a in the cross member 22. A mounting hole 30 for mounting or the like is closed with a cover 31.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an assembling structure of a controller for electronic control in a forklift.

[0002]

[Prior Art]

 A forklift is an industrial vehicle for loading and unloading that has a mast that moves up and down loaded cargo in the front of the vehicle body to enable movement between locations.

The above-mentioned forklift replaces the conventional mechanical forklift, that is, transmits the operation amount of the operating lever to a control valve via a mechanical link mechanism, and controls the opening degree of this control valve to control the oil amount. Instead of the one that adjusts the speed of raising and lowering etc. by controlling, the electronically controlled type that can perform predetermined control by operating the work machine lever with significantly lighter operating force Is popular in

In the electronically controlled forklift, a controller for calculating and processing various signals must be provided, but conventionally, the controller was only mounted inside the frame.

[0005]

[Problems to be solved by the device]

 Therefore, in the above configuration, water or dust may enter through the gap between the controller case and the frame mounting surface, and it cannot be said that the controller is sufficiently protected. Therefore, when water or dust is to be protected, it is necessary to finish the controller case precisely to eliminate the gap, or to fill the gap with a sealant or the like, which is a problem in terms of man-hours and cost.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, in the present invention, the cross member that constitutes the frame of the forklift has a closed cross-sectional shape, and the controller for electronic control is arranged in this cross member.

[0007]

[Action]

 In the above structure, the controller is housed in the cross member, so it is not affected by water or dust. The cross member is provided with work holes for assembling and inspecting the controller, which are covered with a cover.

[0008]

【Example】

 First, the outline of the electronically controlled forklift will be described. FIG. 3 shows an external perspective view of an example of an electronically controlled forklift. As shown in the figure, the lift cylinder 1 is fixed to a pair of left and right outer masts 2, and as the piston rod 1a expands and contracts, the outer mast 2 is used as a guide to move the pair of left and right inner masts 3 up and down. . At this time, the outer mast 2 is fixed to the vehicle body 6 in front of the vehicle body 6. As a result, as the inner mast 3 moves up and down, a lifting unit including a bracket 5 suspended on a chain (not shown) and a fork 4 for directly loading luggage moves up and down.

The tilt cylinder 7, together with the outer mast 2 and the inner mast 3, tilts the elevating part forward (opposite the vehicle body 6) and backward (on the vehicle body 6 side). That is, in the case of unloading, it tilts forward and in the case of loading and transporting luggage, it tilts backward to maintain good workability and ensure safety. .

The working machine levers 8a and 8b are for controlling the operation of the lift cylinder 1 and the tilt cylinder 7 through the controller and the electromagnetic proportional control valve when the operator operates them, and performs an emergency stop. It is stored in a Joystick box 12 together with a safety switch 11 for The working machine levers 8c, 8d, 8e are provided to deal with the case where various kinds of attachments such as roll clamps and bale clamps are attached. The seat switch 13 is a switch that operates when the operator sits in the driver's seat 14 and outputs its output signal to the controller.

FIG. 2 shows the front of the frame 21 of the forklift. The frame 21 is joined at its upper and lower parts in the left-right direction by cross members 22 and 23, and a fuel tank 24 and a hydraulic oil tank 25 are provided on both sides.

The cross member 22 that joins the upper portion of the frame 21 has a closed cross-sectional shape. As shown in FIG. 1, which is a sectional view taken along the line AA of FIG. 2, a controller 27 is attached to one wall surface 22a in the cross member 22 via a rubber cushion 26. The harness 28 extending from the controller 27 is led out through a hole provided in the lower surface 22b of the cross member 22, and a grommet 29 is attached to the harness 28 in order to protect the harness 28 and to seal this portion. The surface 22c of the cross member 22 facing the wall surface 22a on which the controller 27 is provided is provided with a mounting hole 30 for assembling the controller 27, inspection work, and the like. The hole 30 is closed by a plate-shaped cover 31 after the controller 27 is assembled.

In the above-described controller assembly structure, since the controller 24 is housed in the closed space, water and dust do not enter around the controller 24.

[0014]

[Effect of the device]

 According to the assembling structure of the controller for electronic control in the forklift according to the present invention, the controller is housed in the cross member, so that the controller can be protected from water and dust, and the cross member can be used as it is. As a result, it will be advantageous in terms of cost.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a controller assembly structure according to an embodiment.

FIG. 2 is a front view of a frame of a forklift truck.

FIG. 3 is a perspective view of an example of a forklift.

[Explanation of symbols]

 21 frame 22 cross member 27 controller 31 cover

Claims (1)

[Scope of utility model registration request] 1. An assembling structure of a controller in a forklift, wherein a cross member constituting a frame of the forklift has a closed cross-sectional shape and a controller for electronic control is arranged in the crossmember.