JPH0348285Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an opening fixing device for a vertically opening/closing hinged cover constituting a construction machine building having a handrail.

2. Description of the Related Art Conventional opening fixing devices for a vertically opening/closing hinged cover include those shown in the configuration diagrams of FIGS. 1 to 7, for example. To explain the drawings below, Figure 1 is a side view of the entire hydraulic excavator.
1 is a frame, 2 is a tank, 3 is a handrail, and 4 is a cover with a hinge that can be opened and closed up and down (hereinafter referred to as the cover)
The upper part of the hydraulic excavator building, that is, tank 2
A headlight 10 is mounted on the top of the machine by bolts and nuts so that it can be operated at night. FIG. 2 is a configuration diagram of a conventional example, and FIG. 3 is a view taken in the direction of arrow A in FIG. As shown by the dashed line, the tip of the opened cover 4 comes into contact with the side wall of the tank 2 and does not open any further. Therefore, the center of gravity of the cover 4 (second
Although the cross mark in the figure is located outside the vertical plane passing through the center line of the hinge 4a, the distance l between the center of gravity and the pin center of the hinge 4a is small, so for safety reasons, the cover 4 will not fall. Like a stick stopper 5
has been established. Further, there are cases where the stopper 5 is not provided, but in that case, it is necessary to hold the cover 4 by hand so that it does not fall down. The larger the opening of the cover 4 is, the more convenient it is to use, and it is normal to make the opening of the cover 4 as large as possible. Fig. 4 is a configuration diagram of another conventional example, and Fig. 5 is B of Fig. 4.
In the arrow view, the direction in which cover 4 is opened is the same as in the above example.
This is the case when the angle is changed by 90°. In this case, in order to increase the safety of getting on and off the building, the cover 4 is opened toward the handrail 3 side, which tends to be larger, and if you try to make the opening of the cover 4 larger,
Since the center of gravity of the cover 4 (indicated by an x in FIG. 5) does not exceed the vertical plane passing through the center line of the hinge 4a, a stopper 5 is provided to prevent the cover 4 from falling.
In addition, stopper 5 is also used for falling to the opposite side. 6 is a sectional view taken along the line C-C in FIG. 4, and FIG. 7 is a view taken along arrow D in FIG.
The stopper holding plate 5b constituting the hinge part is a stopper fixing plate having a hole into which the tip of the stopper 5 is inserted when storing the stopper 5. In addition,
The one-dot chain line in FIG. 7 indicates the position of the stopper 5 when the stopper 5 is removed from the hole in the stopper fixing plate 5b.
There is a hole for inserting. As described above, in the conventional example, the stopper 5 is required to safely hold the cover 4 in the open state.

Providing the stopper 5 increases the cost.

Since it takes time and effort to operate the stopper 5, some people may omit this operation, which is a safety problem.

In order to safely hold the cover 4 when opened without providing the stopper 5, it is necessary to increase the distance l, so the dimensions of the opening of the cover 4 are made small so that the cover 4 can be opened wide. This makes the cover 4 less convenient to use.

There were other problems.

This invention was made in order to solve the above-mentioned problems, and its purpose is to provide an opening fixing device for a vertically opening/closing hinged cover that does not require a bar-shaped stopper.

In order to achieve this purpose, in this invention, a construction machine having a building having a handrail and a vertically opening/closing hinged cover rotatably attached to the building by a hinge whose center line is horizontal, A headlight, which is an accessory for construction machinery, is attached to the top of the cover, and when the cover is opened and the cover touches the handrail,
The handrail is arranged such that the center of gravity of the cover and the headlight is located on the opposite side of a vertical plane passing through the center line of the hinge from the cover in the closed state.

This invention will be explained below based on the drawings. Figures 8 to 10 are configuration diagrams of one embodiment of this invention, with Figure 9 being a view taken in the direction of arrow E in Figure 8, and Figure 10 being a view of the
It is a FF arrow view of a figure. The configuration and operation will be explained below. Since 1 to 4a are the same as the above conventional example, only the different points will be described. 6 is a headlight that is an accessory of a construction machine attached to the upper surface of the cover 4 near the hinge 4a with bolts 8 and nuts 9;
7 is a cover fixed to the cover 4 to protect the headlight 6 and to serve as a step when getting on and off the building; when the cover 4 is opened and the cover 4 touches the handrail 3, the cover 4 and the headlight are removed. The handrail 3 is arranged such that the center of gravity of the handrail 6 and the cover 7 is located on the opposite side of the cover 4 in the closed state with respect to a vertical plane passing through the center line of the hinge 4a.

Therefore, if the cover 4 is brought into contact with the handrail 3 when the cover 4 is opened, the cover 4
can be kept open, so the stopper 5
There is no need to provide The center of gravity of the cover 4, headlight 6, and cover 7 and the hinge 4a
By increasing the distance l ₁ from the center of the pin, cover 4
can be reliably kept open. Further, since the headlight 6 is attached to the upper surface of the cover 4, the night illumination function is not impaired.

As explained above, in the opening fixing device for the vertically opening/closing hinged cover according to this invention,
Since there is no need to provide a bar-shaped stopper, the cost is reduced, and there is no need to forget to attach the bar-shaped stopper, resulting in safety. In this way, the effects of this invention are remarkable.

[Brief explanation of the drawing]

Figure 1 is a side view of the entire hydraulic excavator, Figure 2 is a configuration diagram of a conventional example, Figure 3 is a view taken in the direction of arrow A in Figure 2, Figure 4 is a configuration diagram of another conventional example, and Figure 5. is the fourth
A view in the direction of arrow B in the figure, Figure 6 is a sectional view taken along line C-C in Figure 4,
FIG. 7 is a view in the direction of the D arrow in FIG. 6, FIG. 8 is a configuration diagram of an embodiment of this invention, FIG. 9 is a view in the direction of the E arrow in FIG.
FIG. 10 is a view taken along the line FF in FIG. 8. 3...Handrail, 4...Cover, 4a...Hinge, 6...Headlight.

Claims (1)

[Scope of utility model registration request] In a construction machine that has a building having a handrail and a vertically opening/closing hinged cover that is rotatably attached to the building by a hinge whose center line is in a horizontal direction, a headlight that is an accessory of the construction machine is mounted on the top surface of the cover. Install it, open the above cover,
The said cover is arranged so that, when the cover is brought into contact with the handrail, the center of gravity of the cover and the headlight is located on the opposite side of the closed state of the cover with respect to a vertical plane passing through the center line of the hinge. A device for fixing the opening of a hinged cover that opens and closes vertically, and is characterized by a handrail.