JP2001253697A - Mast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand a forward visual field in a mast device applicable to a cargo handling vehicle such as a forklift truck. SOLUTION: This mast device is provided with a mast frame 2 and an upper connecting material 3, and the upper connecting material 3 is tilted by a predetermined angle θ along the line of sight of an operator A seated in a driver seat 102.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a mast device applied to a cargo handling vehicle such as a forklift.

[0002]

2. Description of the Related Art Conventionally, as this type of mast device, for example, the one shown in FIG. 2 is known. The mast device 50 includes a pair of left and right mast frames 51 erected on the front side of the vehicle body 101 of the cargo handling vehicle 100, and an upper connecting member 52 connecting upper portions thereof, and the upper connecting member 52 is horizontally Is provided.

[0003]

However, since the upper connecting member is provided horizontally, that is, at a right angle to the mast frame, a blind spot from a driver sitting in the driver's seat A is disadvantageous. B was large and the front view was very bad. This was particularly noticeable at the point of the maximum width of the upper connecting member. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in order to solve the problem. An object of the present invention is to provide a mast device which is designed to enlarge a forward visual field.

[0004]

The mast device of the present invention comprises:
Basically, in a mast device provided with a pair of left and right mast frames erected on the front side of the body of the cargo handling vehicle, and an upper connecting material for connecting the upper portions of the mast frames, the upper connecting material, It is characterized in that it is inclined by a predetermined angle along the line of sight of the driver sitting in the driver's seat.

[0005] When a driver sits in a driver's seat and looks up in an oblique front-up direction, an upper connecting member is present above the mast frame. However, since the upper connecting member is inclined by a predetermined angle along the line of sight of the driver, the blind spot obstructed thereby is minimized. For this reason, the front view is greatly expanded.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the outline of the mast device of the present invention.

The main part of the mast device 1 is composed of a mast frame 2 and an upper connecting member 3, and is used as an outer mast of a single-stage mast or a multi-stage mast.

[0008] The mast frame 2 is a vehicle body 10 of the cargo handling vehicle 100.
1 is a pair of right and left standing on the front side of this 1. In this example,
It is elongated in the vertical direction and has a substantially groove-shaped cross section (channel type).
The grooves are opposed to each other in the left-right direction.

The upper connecting member 3 connects the upper parts of the mast frame 2 together and is inclined by a predetermined angle θ along the line of sight of the driver A seated in the driver's seat 102. It has a mold, and both ends are welded and fixed to upper outer surfaces of both mast frames 2.

Although not shown, the mast device 1 includes a lower connecting member for connecting lower portions of both mast frames 2 and an appropriate number of lower connecting members for connecting lower portions of both mast frames 2. And a tilt support for a tilt cylinder provided on the vehicle body 101 of the cargo handling vehicle 100, a mast support for attaching the vehicle to the vehicle body 101 so as to be able to tilt forward and backward.

Next, the operation will be described based on such a configuration. When the driver A is seated on the driver's seat 102 of the cargo handling vehicle 100 and looks up in the front upper oblique direction, the upper connecting member 3 exists above the mast frame 2. However, since the upper connecting member 3 is inclined by a predetermined angle θ with respect to the horizontal along the line of sight of the driver A, the blind spot B hindered thereby is minimized. At this time, the width in the front-rear direction including the maximum width of the upper connecting member 3 is not relevant, and only the thickness of the upper connecting member 3 in the vertical direction is relevant. For this reason, the front view is greatly expanded. As a result, the cargo handling operation can be performed safely and efficiently.

Since only the upper connecting member 3 is inclined by the predetermined angle θ, the strength of the mast device 1 does not decrease. Since the upper connecting member 3 is inclined by the predetermined angle θ, the width of the mast device 1 in the front-rear direction can be reduced accordingly, and the mast device 1 can be made compact.

[0013]

As described above, according to the present invention, as described above,
The following excellent effects can be obtained. (1) Since the mast frame and the upper connecting member are provided, and in particular, the upper connecting member is inclined by a predetermined angle along the line of sight of the driver sitting on the driver's seat, the forward field of view can be expanded.

[Brief description of the drawings]

FIG. 1 is a side view showing an outline of a mast device of the present invention.

FIG. 2 is a side view showing an outline of a conventional mast device.

[Explanation of symbols]

1,50: Mast device, 2,51: Mast frame, 3,52
... upper connecting member, 100 ... cargo handling vehicle, 101 ... body, 10
2: Driver's seat, A: Driver, B: Blind spot, θ: Predetermined angle.

Claims (1)

[Claims] 1. A mast device comprising: a pair of left and right mast frames erected on a front side of a vehicle body of a cargo handling vehicle; and an upper connecting member for connecting upper portions of both mast frames. A mast device characterized by being inclined by a predetermined angle along the line of sight of a driver sitting in a driver's seat.