JP2002127785A - Explosionproof type industrial vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an explosionproof type industrial vehicle, in which the mechanical strength of the upper wall of an explosionproof container is maintained, while a good forward visibility is secured and the visibility of a display monitor can be improved. SOLUTION: In the exlosionproof type industrial vehicle 10, an opening 22 for a display monitor 21 is formed on the upper wall of the explosionproof container 15. For closing of the opening 22, a glass plate 26 is provided on the back surface 20a of the upper wall 20. On the back surface 26A of the glass plate 26, a liquid crystal panel 28 for the display monitor 21 is provided. Thus a driver 30 can see the display monitor 21 from his position, wherein at least the part of a rim 23 facing the driver's side has a beveled part 25, out of the rim 23 forming the opening 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof industrial vehicle, and more particularly, to an explosion-proof industrial vehicle provided with an explosion-proof container housing a control box in a vehicle body and a display monitor in the explosion-proof container.

[0002]

2. Description of the Related Art An explosion-proof industrial vehicle has an explosion-proof container 60 on its body as shown in FIG.
An opening 63 for a display monitor 62 is formed on 61, and a step 64 is further formed on the back surface 61A of the upper wall 61, and a glass plate 65 is provided on the step 64, and on the back surface 65A side of the glass plate 65. A liquid crystal panel 66 for the display monitor 62 is provided, and the driver 67 can view the display monitor 62.

[0003] As shown in FIG.
Is formed in a rectangular shape, and indicates a battery charge amount 62A, a fuel remaining amount 62B, a vehicle speed 62C, an operation time 62D, and the like.
By looking at the display monitor 62, the traveling state of the explosion-proof industrial vehicle can be grasped. For this reason, it is important to arrange the display monitor 62 at a position that is easy for the driver 67 to see.

[0004]

However, as shown in FIG. 6, in the explosion-proof container 60, the thickness t1 of the upper wall 61 must be set large in order to satisfy the explosion-proof standard. Therefore, when the driver 67 looks at the display monitor 62, the peripheral portion 63A of the opening 63 obstructs the driver's 67 view as shown by the arrow.

As a result, the area of the display monitor 62 seen by the driver 67 is shifted inward by the dimension a, so that the shaded area E is hardly seen by the driver 67 as shown in FIG. Therefore, in order to see the display monitor 62, the driver 67 needs to look into the display monitor 62 while shifting his / her body position. Therefore, there is a problem that it is difficult for the driver 67 to concentrate on the work.

In order to solve this problem, it is conceivable to form the opening 63 for the display monitor 62 large. However, if the opening 63 is formed to be large, the mechanical strength of the upper wall 61 of the pressure-resistant explosion-proof container 60 is reduced, so that it is not possible to meet the explosion-proof standard.

Further, To solve this problem, the display surface of the display monitor 62 may be inclined toward the driver 67. However, if the display surface of the display monitor 62 is tilted toward the driver 67, the display surface may obstruct the front view of the explosion-proof industrial vehicle.

The present invention has been made in view of the above-mentioned problems, and has as its object to maintain the mechanical strength of the upper wall of an explosion-proof container and to maintain a good front view while allowing a display monitor to be visually recognized. An object of the present invention is to provide an explosion-proof industrial vehicle capable of improving the performance.

[0009]

According to a first aspect of the present invention, there is provided an explosion-proof container having a control box housed in a vehicle body. An opening for a display monitor is formed in the upper wall of the device, a glass plate is provided on the back surface of the upper wall to close the opening, and a liquid crystal panel for a display monitor is provided on the back surface of the glass plate. In an explosion-proof industrial vehicle in which a display monitor can be viewed by a driver, a chamfer is provided at least on the driver's side of the peripheral part forming the opening.

Here, the opening for the display monitor is generally formed in a rectangular shape, but is not limited to this, and may be set in another shape such as an ellipse, a parallelogram, or a trapezoid. It is possible. Further, a material that covers the opening is not limited to a glass plate, and a transparent plate having mechanical strength and flame retardancy can be used instead.

In the thus constructed explosion-proof industrial vehicle, the chamfered portion is provided at least on the driver's side of the peripheral portion forming the opening. Therefore, when the driver looks at the display monitor, it is possible to prevent the driver's view from being obstructed by the periphery of the opening.

Further, since it is not necessary to form a large opening for the display monitor, the mechanical strength of the upper wall of the explosion-proof container can be maintained. In addition, there is no need to tilt the display surface of the display monitor toward the driver, so that the front view of the vehicle can be maintained well.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, an explosion-proof industrial vehicle 10 according to the first embodiment has a mast 12
The fork 13 is provided on the mast 12 so as to be able to move up and down, and an explosion-proof container 15 and an operation lever are provided behind the mast 12.
17A, 17B, and 17C are provided, a cab 18 is provided behind the operation levers 17A, 17B, and 17C, and a steering handle 19 is provided on the left side of the cab 18.

The explosion-proof industrial vehicle 10 has an explosion-proof container 15
An opening 22 for a display monitor 21 is formed in the upper wall 20 (see FIG. 2).
A step portion 24 is formed on 20A (see FIG. 3), a glass plate 26 is attached to the step portion 24 with a gasket 27 interposed therebetween, and a liquid crystal panel 28 for the display monitor 21 is provided on the back surface 26A side of the glass plate 26. The display monitor 21 changes the driver 30
It is provided on the left front of the cab 18 so that it can be seen from FIG.

In addition, the explosion-proof industrial vehicle 10 has a peripheral portion forming an opening 22 in the upper wall 20 as shown in FIGS.
A chamfered portion 25 is provided on the entire circumference of 23. Where the periphery
The entire circumference of 23 refers to a peripheral portion 23 of four sides on the left, right, front and rear.

The display monitor 21 has a rectangular display portion with an opening 22 and displays a charged amount 21A of the battery, a remaining fuel amount 21B, a vehicle speed 21C, an operating time 21D, and the like. By this, explosion-proof industrial vehicles 10
You can grasp the running state of the car.

The explosion-proof container 15 is provided on the vehicle body 11, and maintains the mechanical strength of the upper wall 20 of the explosion-proof container 15 to satisfy the explosion-proof standard. Is set to be large. However, as described above, the upper wall 20
Since the chamfered portion 25 is provided on the peripheral edge portion 23 forming the opening portion 22, the visibility of the display monitor 21 is kept good.

Therefore, in order to keep the visibility of the display monitor 21 good, the opening 22 for the display monitor 21 is required.
Need not be formed large. For this reason, explosion-proof containers
The mechanical strength of the upper wall 20 of the 15 can be adjusted to the explosion-proof standard. In addition, it is not necessary to tilt the display surface of the display monitor 21 (that is, the surface of the glass plate 26) toward the driver 30 in order to keep the visibility of the display monitor 21 good. For this reason, a good front view of the explosion-proof industrial vehicle 10 can be maintained.

Next, a display monitor will be described with reference to FIG.
The visibility of No. 21 will be described. Since the chamfered portion 25 is provided at the peripheral portion 23 forming the opening 22 for the display monitor 21, when the driver 30 looks at the display monitor 21, the peripheral portion 23 of the opening 22 (a portion shown by an imaginary line) , So that the field of view of the driver 30 is not obstructed. Therefore, the driver 30 moves the outer edge 21A of the display
You can easily see up to. Therefore, the visibility of the display monitor 21 is improved, and the driver 30 can concentrate on the work.

On the other hand, when the chamfered portion is not formed at the peripheral portion of the upper surface as in the prior art, when the driver 30 looks at the display monitor 21, the peripheral portion 23 of the opening 22 is formed.
(A part shown by an imaginary line) obstructs the field of view of the driver 30, and the area of the display monitor 21 seen from the driver 30 is shifted inward from the outer edge 21A by a dimension. Therefore, in order to see the display monitor 21, the driver 30 needs to look into the display monitor 21 while shifting his / her body position. Therefore, it is difficult for the driver 30 to concentrate on the work.

Next, the mechanical strength of the upper wall 20 of the explosion-proof container 15 will be described with reference to FIG. Should an explosion occur in the explosion-proof container 15, the upper wall supporting the glass plate 26
An evenly distributed load w is applied to the 20 step portions 24. Therefore, the glass plate
The shearing force F applied to the step portion 24 of the upper wall 20 supporting the glass plate 26 is expressed by F = w × x (where the length of the step portion 24 is x). Base 24 of step 24
A is maximum. This shearing force F is applied from the base 24A to the tip 24B.
And F = 0 at the tip 24B.

In addition, the bending moment M when an explosion occurs in the explosion-proof container 15 is represented by M = １ ／ × (w × x 2), and the step portion 24 of the upper wall 20 supporting the glass plate 26 is provided. Base 24
A is maximum. The bending moment M decreases as the distance from the base 24A to the tip 24B decreases.
= 0.

Therefore, at the base 24A of the step portion 24, the upper wall 2
By forming the chamfered portion 25 so as to secure the thickness t of 0, the mechanical strength of the upper wall 20 of the explosion-proof container 15 can be maintained. That is, the chamfer width x1 of the chamfered portion 24 is changed to the stepped portion.
By setting the length smaller than the length x, the mechanical strength of the upper wall 20 can be maintained.

The explosion-proof industrial vehicle 10 of the present invention is not limited to the above-described embodiment, but can be appropriately modified and improved. For example, the case where the chamfered portion 25 is provided on the entire periphery of the peripheral portion 23 has been described,
The chamfered portion 25 may be provided at least in the peripheral portion 23 of the peripheral portion 23 on the driver 30 side. Specifically, a chamfered portion 25 may be provided on each of the right peripheral portion 23 and the rear peripheral portion 23 in FIG.

The case where the display monitor 21 is disposed at the front left of the cab 18 has been described. However, the present invention is not limited to this, and the display monitor 21 is disposed at another position such as the front of the cab 18 or the front right. It is also possible.

In addition, materials, shapes, dimensions, and the like of the explosion-proof container 15, display monitor 21, opening 22, and chamfer 25 of the explosion-proof industrial vehicle 10 exemplified in the above-described embodiment.
The form, number, location, etc. are arbitrary and are not limited as long as the present invention can be achieved.

[0027]

As described above, according to the present invention, as described in claim 1, a chamfered portion is provided at least on the driver's side of the peripheral portion forming the opening. Was done. Therefore, when the driver looks at the display monitor, it is possible to prevent the driver's view from being obstructed by the periphery of the opening. For this reason, the visibility of the display monitor can be improved and the display monitor can be easily seen by the driver, so that the driver can concentrate on the work.

Furthermore, since it is not necessary to form a large opening for the display monitor, the mechanical strength of the upper wall of the explosion-proof container can be adjusted to the explosion-proof standard. In addition, there is no need to tilt the display surface of the display monitor toward the driver, so that the front view of the vehicle can be maintained well.

[Brief description of the drawings]

FIG. 1 is a plan view showing an explosion-proof industrial vehicle according to the present invention.

FIG. 2 is a perspective view showing a display monitor in the explosion-proof industrial vehicle according to the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a diagram illustrating the visibility of a display monitor in an explosion-proof industrial vehicle according to the present invention.

FIG. 5 is a diagram illustrating the mechanical strength of the upper wall of the explosion-proof container in the explosion-proof industrial vehicle according to the present invention.

FIG. 6 is a diagram illustrating the visibility of a display monitor in a conventional explosion-proof industrial vehicle.

FIG. 7 is a diagram illustrating the visibility of a display monitor in a conventional explosion-proof industrial vehicle.

[Explanation of symbols]

 10 Explosion-proof industrial vehicles 11 Body 15 Explosion-proof container 20 Top wall 20A Back 21 Display monitor 22 Opening 23 Peripheral edge 25 Bevel 26 Glass plate 26A Back 28 LCD panel 30 Driver

Claims (1)

[Claims] 1. An explosion-proof container accommodating a control box in a vehicle body, an opening for a display monitor is formed in an upper wall of the explosion-proof container, and a back surface of the upper wall is formed to close the opening. A glass plate is provided, a liquid crystal panel for a display monitor is provided on the back side of the glass plate, and in an explosion-proof industrial vehicle in which a driver can see the display monitor, of the peripheral portion forming the opening, An explosion-proof industrial vehicle, wherein a chamfered portion is provided at least on a peripheral portion on a driver side.