JP2000118448A - Cabin supporting device for industrial vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cabin support device to be effective in the prevention of oscillation in the horizontal direction of a cabin, in a fork lift having a tilt type cabin falling sideways of a car body. SOLUTION: This cabin support device comprises a rotation support part to support in a manner to fall sideways of a car body, and a support part B on the fixed side to support the jumping-up part of the cabin in an operation position from the lower side. The support part B on the fixed side comprises a lower bracket 11 in a triangular chevron-shape welded to a pedestal 10 fixed at the car body, a buffering material 12, such as rubber, fixed on the slopes of the front and rear surfaces of the lower bracket 11, and an upper bracket 14 welded on the under surface of the floor 2a of the cabin. When the cabin is situated in an operation position, the upper bracket 14 is engaged in an adhered state in a manner to cover the front and rear buffering materials 12 from above.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cabin support device for supporting a cabin in an industrial vehicle such as a forklift having a tilt cabin capable of tilting to the side of a vehicle body (tilt).

[0002]

2. Description of the Related Art In a forklift, for the purpose of improving the workability of maintenance work of various devices and devices disposed below a cabin (operating cab), a tilt that allows a cabin to fall over to a vehicle body side. Forklifts with cabins are known. FIG. 9 is a schematic perspective view showing a tilt cabin support device that can fall over to the side of the vehicle body. In FIG. 9, the front of the vehicle is indicated by an arrow “front”, and the cabin inversion direction is indicated by an arrow “right”. As shown in the drawing, the cabin 32 is rotatably supported on the lower right side of the vehicle body 31 by two front and rear rotation side support portions A,
The hydraulic cabin tilt cylinder (not shown) is configured to fall to the side of the vehicle body. Cabin 3
2 is normally returned to the operating position, and the lower left (flip-up side) lower portion is supported by two fixed front and rear support portions B. Each of the rotation-side support portion A and the fixed-side support portion B includes a cushioning material such as rubber in order to prevent vehicle vibration such as engine vibration from being transmitted to the cabin 32.

FIG. 10 is a sectional view showing the structure of the rotation-side support portion A. As shown in the drawing, a substantially inverted U-shaped bracket 34 is provided on the lower surface of the floor 33 of the cabin 32, and the bracket 34 is attached to a bearing base 35 fixed to the frame side of the vehicle body 31 by a cushioning material 36 such as rubber. And is rotatably mounted by a bolt 37 as a rotation shaft. That is, the pipe 38, the bush 39, and the pipe 4 are provided between the outer peripheral surface of the rotating shaft 37 and the inner peripheral surface of the cylindrical hole of the bearing base 35.
0, the cushioning material 36 is inserted, and the bush 39
And the pipe 40 is a sliding surface. The cushioning material 36
Has an inner peripheral surface bonded to the pipe 40 and an outer peripheral surface bonded to the bearing base 35 side. On the other hand, FIG.
The structure of the fixed-side support portion B that supports the flip-up side of the cross section is shown in cross section. The cushioning material 41 such as rubber is formed in a disk shape,
Bolt 42 inserted through central counterbore mounting hole
Is mounted horizontally on a receiving base 43 fixed to a frame of the vehicle body 31, and is supported by the cabin 32 being mounted thereon.

[0004]

As described above, the conventional cabin supporting device supports both the rotating side support portion A and the fixed side support portion B in the vertical direction, but mainly supports the horizontal direction. This is a structure that is supported by the rotation-side support portion A. For this reason, the vertical vibration generated during the running of the vehicle can be absorbed by the elastic deformation of the cushioning members 36 and 41 on the rotating side and the fixed side, but the acceleration in the horizontal direction, in particular, the acceleration at the time of starting and the braking at the time of the braking operation. For deceleration, the fixed-side support portion B is shifted in the horizontal direction, and the cabin 32
There is a problem that shaking occurs and riding comfort is poor.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a cabin support device for an industrial vehicle which is effective in preventing the cabin from swinging in the horizontal direction. Is to do.

[0006]

To achieve the above object, the present invention is configured as follows. That is, the invention according to claim 1 is a cabin support device for an industrial vehicle for supporting a cabin provided to be capable of falling to the side of the vehicle body. A rotating support portion, and a fixed-side support portion for supporting a floor lower surface of the cabin at the operating position from below, and the fixed-side support portion is fixed to one of the vehicle body side and the cabin. And an engaging member fixed to the other and engaged with the cushioning member from above or below to restrain horizontal movement.

According to the first aspect of the present invention, when the cabin is in the operating position, the cushioning member of the fixed-side support portion engages with the engaging member so that the cabin jumps up and down. Support the floor underside. In this engaged state, the free movement of the cushioning material in the horizontal direction is restricted by the engaging member. For this reason, it is possible to absorb the swing of the cabin when the vehicle is traveling, for example, when acceleration is applied in the front-rear direction due to acceleration at the time of starting or deceleration at the time of braking.

According to a second aspect of the present invention, in the cabin support device for an industrial vehicle according to the first aspect, the mutual engagement surface between the cushioning member and the engagement member is formed by an inclined surface.
According to the second aspect of the present invention, it is possible to efficiently obtain the vibration absorbing action of the cushioning material in both the vertical direction and the horizontal direction.

According to a third aspect of the present invention, in the cabin support device for an industrial vehicle according to the second aspect, one member fixed to the vehicle body side is formed in a convex shape of a mountain, and the other member fixed to the cabin side. Are formed in a concave shape corresponding to the chevron. According to the third aspect of the present invention, a foreign substance is unlikely to ride on the upper surface of the mountain-shaped member on the vehicle body side. Therefore, when the cabin is returned from the overturned position to the operating position, it is effective in preventing the adverse effect such as foreign matter being caught in the engagement surface between the cushioning member and the engagement member.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view of a forklift with a tilt cabin (a cargo handling device is not shown).
FIG. 2 is a schematic perspective view showing a tilt cabin support device. In FIG. 2, the front of the vehicle is indicated by an arrow “front”, and the cabin inversion direction is indicated by an arrow “right”. As shown in the figure, a cabin 2 is arranged at an upper front portion of a vehicle body 1 of a forklift, an engine hood 3 is arranged at an intermediate upper portion, and a counterweight 4 is arranged at an upper rear portion. A cargo handling device including a fork and a mast is installed.

The cabin 2 is rotatably mounted on one of the left and right sides of the floor 2a, for example, a lower portion on the right side toward the front by two front and rear rotating side support portions A with respect to the vehicle body 1. A predetermined angle (for example, 45 degrees) to the side of the vehicle body by a cabin tilt cylinder (not shown)
It is configured to be overturned. In addition, when the cabin 2 is normally returned from the overturned position to the operating position, the lower surface of the floor 2a on the flip-up side (left side) is supported by two fixed front and rear support portions B. That is, when the cabin 2 is in the operating position, the cabin 2 is supported at four points: the rotation-side support portion A and the fixed-side support portion B. Of these support portions, the rotation-side support portion A is exactly the same as the conventional one. Be composed. Therefore, the detailed illustration and description of the rotating side support portion A having the same structure as the conventional one are omitted, and the improved fixed side support portion B will be described below with reference to FIG.

As shown in the figure, the fixed-side support portion B is
A lower bracket 11 fixed to the upper surface of the pedestal 10 fixed to the frame, a cushioning material 12 made of rubber for vibration absorption fixed to the upper surface of the lower bracket 11, and a lower surface of the floor 2a of the cabin 2 And an upper bracket 14 as an engaging member capable of engaging with the cushioning material 12 from above. The lower bracket 11 is formed in a mountain-shaped convex shape formed by bending an iron plate or a steel plate so that the apex angle is substantially 90 degrees, and is disposed on the upper surface of the receiving base 10 such that the front surface and the rear surface are inclined surfaces. Both front and rear lower ends are welded to the upper surface of the pedestal 10. The cushioning material 12 is formed in a disk shape having a mounting hole 12a with a counterbore at the center, and is disposed on the front and rear inclined surfaces of the lower bracket 11, respectively, and the tap hole 11a of the lower bracket 11 is passed through the mounting hole 12a. Are fixed on the base plate 11 by bolts 13 screwed to the base plate 11. Therefore, the front and rear cushioning materials 1
The upper surface of each 2 is a 45-degree inclined surface.

On the other hand, the upper bracket 14 is formed in a corrugated shape obtained by bending an iron plate or a steel plate into a substantially W shape, and is welded in a state in which front and rear ends and a center portion are in contact with the lower surface of the floor 2a. And, W in the upper bracket 14
The central concave portion corresponding to the U-shaped concave surface is in close contact with the front and rear cushioning members 12 so as to cover it from above.

The cabin support device according to the present embodiment is constructed as described above. When the cabin 2 is in the operating position, the cabin 2 is raised with the upper bracket 14 as shown in FIG. Are engaged with the upper surfaces of the front and rear cushioning members 12. In this state, the cushioning material 1
2 is sandwiched by the upper bracket 14 and the lower bracket 11 while free movement in the vertical and longitudinal directions is restricted. For this reason, the vertical vibration generated when the vehicle travels and the front-back vibration caused by acceleration at the time of starting and deceleration at the time of braking act in a direction to compress the cushioning material 12. As a result, the swing of the cabin 2 in the up-down direction and the back-and-forth direction can be absorbed and the riding comfort can be improved.

In the above embodiment, the cushioning material 12
Since the engagement surface between the upper bracket 14 and the upper bracket 14 is set to 45 degrees, substantially the same vibration absorption performance can be obtained in the vertical direction and the front-rear direction. Further, in the present embodiment, the engagement surface between the cushioning material 12 and the upper bracket 14 has a convex shape on the vehicle body 1 side and a concave shape on the cabin 2 side, so that foreign matter is caught between the engagement surfaces. This is effective in preventing.

The present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention. For example, as shown in FIG. 4, the cushioning material 12 fixed by bolts 13 on the receiving base 10 fixed to the vehicle body 1 is formed in a substantially mountain shape having a front and rear integrated structure, or as shown in FIG. The structure in which the cushioning material 12 is fixed to the floor 2a side of the cabin 2 by the bolt 13 can be changed. As shown in FIGS. 6 and 7, the cushioning member 12 is formed in a conical or pyramid shape and is directly fixed to the cradle 10 of the vehicle body 1 or the floor 2 a of the cabin 2 by the bolt 13, It is possible to change to a configuration in which a bracket 15 as an engaging member having a concave portion of a corresponding shape is provided on the floor 2a or the pedestal 10. Further, the inclination angle of the engagement surface does not necessarily need to be 45 degrees, and may be changed as appropriate. In some cases, as shown in FIG. 8, the cushioning member 12 may be a disk, and a slightly shallow dish-shaped bracket 16 may be engaged with the disk. And a horizontal vibration absorption effect can be obtained.

[0017]

As described in detail above, according to the present invention,
In an industrial vehicle equipped with a tilt cabin, it is possible to obtain a horizontal vibration absorption effect without impairing the vertical vibration absorption effect when the vehicle is running, and this makes it possible, for example, to accelerate the vehicle at the start or decelerate the vehicle at the time of braking. The vibration of the cabin when acceleration acts on the vehicle can be absorbed to improve the riding comfort.

[Brief description of the drawings]

FIG. 1 is a perspective view of a forklift with a tilt cabin according to an embodiment (a cargo handling device is not shown).

FIG. 2 is a schematic perspective view showing a tilt cabin support device.

FIG. 3 is a cross-sectional view showing a fixed-side support portion in the cabin support device.

FIG. 4 is a cross-sectional view showing a modification example regarding a fixed-side support portion.

FIG. 5 is a cross-sectional view showing another modification example of the fixed-side support portion.

FIG. 6 is a cross-sectional view showing another modification example of the fixed-side support portion.

FIG. 7 is a cross-sectional view showing another modification example of the fixed-side support portion.

FIG. 8 is a cross-sectional view showing another modification example of the fixed-side support portion.

FIG. 9 is a schematic perspective view showing a conventional tilt cabin support device.

FIG. 10 is a cross-sectional view showing a rotation-side support portion in a conventional cabin support device.

FIG. 11 is a cross-sectional view showing a fixed-side support portion in a conventional cabin support device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Cabin 2a ... Floor 10 ... Cradle 11 ... Lower bracket 12 ... Buffer material 14 ... Upper bracket A ... Rotation side support part B ... Fixed side support part

Claims (3)

[Claims] 1. A cabin support device for an industrial vehicle for supporting a cabin provided to be capable of falling to the side of a vehicle body, comprising: a rotation support portion for supporting the cabin so as to be capable of falling to the side of the vehicle body. A fixed-side support portion for supporting the floor lower surface of the cabin on the flip-up side from below in the operating position, wherein the fixed-side support portion is fixed to one of the vehicle body side and the cabin. A cabin support device for an industrial vehicle, comprising: a cushioning member; and an engaging member fixed to the other side and engaged with the cushioning member from above or below to restrict horizontal movement. 2. The cabin support device for an industrial vehicle according to claim 1, wherein a mutual engagement surface between the cushioning member and the engagement member is formed by an inclined surface. 3. The cabin supporting device for an industrial vehicle according to claim 2, wherein one member fixed to the vehicle body side is formed in a convex shape of a mountain, and the other member fixed to the cabin side corresponds to the mountain shape. Cabin support device for industrial vehicles formed in a concave shape.