JP2563565Y2 - Cab of construction machinery - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a cab mounted on construction machines such as a hydraulic excavator that can be turned inside a vehicle.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view of a hydraulic shovel equipped with a cab 1 of the prior art as viewed from an obliquely upper rear side.
In the figure, 2 is a lower traveling body, 3 is an upper revolving superstructure, 4 is a door of the cab 1, and 5 is a counterweight. FIG.
FIG. 4 is a cutaway plan view of a main part showing an arrangement of the cab 1 as viewed from A in FIG. 3. In the figure, 6 is a driver's seat in the cab 1, 2R
Is the vehicle width dimension of the lower traveling unit 2 (shown by a virtual line), 0 is the turning center of the upper revolving unit 3, and a (shown by a virtual line) is the turning center 0.
It is a vehicle width circle having a radius R. FIG. 5 is a perspective view of the cab 1 as viewed obliquely from the front. The equipment structure inside the cab 1 is not shown. In FIG. 5, reference numeral 7 denotes a front surface of the cab 1, 8 denotes an oblique front surface, 9 denotes a front sash extended to the front surface 1, and 10 denotes a sash extended to the oblique front surface. FIG.
FIG. 6 is a cross-sectional view of a main part viewed from BB in FIG. 5. In the figure, 11 is H rubber, and 14 is a support. FIG. 7 is a cross-sectional view of a main part of a cab 1 'of another example of the prior art viewed from above. On the oblique front surface 8a of the cab 1 ', a so-called fitted-in window glass 12 is stretched.

The prior art cab 1 is described with reference to FIGS. The cab 1 and the counterweight 5 mounted on the upper revolving unit 3 are arranged within the vehicle width circle a of the lower traveling unit 2 so that the in-vehicle turning hydraulic excavator can work in a narrow place. For this purpose, the side edge of the front side of the cab 1 is cut obliquely obliquely as viewed from above to form an oblique front surface 8. A front sash 9 and a sash 10 are provided on the front surface 7 of the cab 1 and the oblique front surface 8 respectively.

[0004]

[Problem to be Solved by the Invention] In the in-vehicle turning hydraulic excavator, the front end of the cab is chamfered obliquely as viewed from above so that the cab is disposed within the vehicle width circle. The diagonal front surface is formed by shaving. In the cab of the prior art, separate sashes or glass are provided on the front surface of the cab and the above-mentioned oblique front surface, respectively. Therefore, at the boundary between the front surface and the oblique front surface of the cab, there are opaque members such as H rubber, a sash frame, and columns. The lateral width of the front of the hydraulic excavator within the vehicle width is considerably smaller than the front width of the cab of a general hydraulic excavator, and the opaque member is formed at the boundary with the oblique front surface. , The driver's forward visibility was significantly impaired. The purpose of the present invention is to solve the above problems.

[0005]

According to the present invention, a front sash having a rectangular cross section as viewed from above is formed on a cab equipped on an in-vehicle turning hydraulic excavator and having an oblique front surface. A front sash was extended from the front surface of the cab to the oblique front surface.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of the cab 15 of the present invention as viewed obliquely from the front. In the figure, the same reference numerals are given to components using the same components as the conventional technology. The equipment structure inside the cab 15 is not shown. 3 'is the upper revolving structure, 7' is the front surface of the cab 15, 8 'is the oblique front surface,
16 is a front sash, and 17 is a glass of the front sash 16. FIG. 2 is a cross-sectional view of a main part viewed from CC in FIG. In the figure, 18 is H rubber and 14 'is a support.

Next, the structure of the cab 15 according to the present invention will be described with reference to FIGS. In the present invention, a cab (1) equipped with an in-vehicle turning hydraulic excavator and having an oblique front surface 8 'is provided.
5), a front sash 16 having a rectangular cross section as viewed from above is formed, and the front sash 16 is attached to the cab (1).
5) From the front surface 7 'to the oblique front surface 8'.

Next, the operation of the cab 15 according to the present invention will be described. In the present invention, the front sash 16 of the cab 15 is formed from the front surface 7 'to the oblique front surface 8'.
The front surface and the oblique front surface are stretched with transparent glass 17, and there is no opaque member such as H rubber which hinders the driver's front view. Therefore, the front view of the driver is widened, and the forward visibility and safety can be improved. Further, since the front and oblique front portions of the cab are constituted by sashes, the cab does not lose air permeability.

[0009]

[Effect of the Invention] In the in-vehicle turning hydraulic excavator, the front end of the cab is cut obliquely obliquely as viewed from above so that the cab is disposed within the vehicle width circle. An oblique front surface is formed, and in the prior art cab, separate sashes or glass are provided on the front surface of the cab and the oblique front surface, respectively. For this reason, the front width of the cab is narrow, and an opaque member such as H rubber is present at the boundary between the oblique front surface and the front surface. However, in the present invention, a front sash having a rectangular cross section as viewed from above is formed on a cab equipped with an in-vehicle turning hydraulic excavator and having an oblique front surface, and the front sash is positioned above the front of the cab. It was stretched over the oblique front surface.
As a result, the front surface and the oblique front surface are stretched with transparent glass, and there is no opaque member such as H rubber which hinders the driver's front view. Therefore, the front view of the driver is widened, and the forward visibility and safety can be improved. In addition, since the front surface and the oblique front surface of the cab are formed of a sash, the cab does not lose air permeability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cab of the present invention as viewed obliquely from the front.

FIG. 2 is a cross-sectional view of a main part as viewed from CC in FIG.

FIG. 3 is a perspective view of a hydraulic excavator equipped with a cab according to the related art as viewed from a diagonally upper rear side.

FIG. 4 is a cutaway plan view of an essential part showing the arrangement of the cab as viewed from A in FIG. 4;

FIG. 5 is a perspective view of a cab according to the related art as viewed from an oblique front portion.

FIG. 6 is a cross-sectional view of a main part taken along line BB in FIG. 6;

FIG. 7 is a cross-sectional view of a main part of a cab according to another embodiment of the prior art, as viewed from above.

[Explanation of symbols]

 1,1 ', 15,15' cab 2 Lower traveling structure 3,3 ', 3'a Upper revolving structure 7,7', 7'a Front surface 8,8 ', 8a, 8'a Oblique front surface 9, 16 Front sash 10 Sash 11,18 H rubber 17 Glass a Car width circle

Claims (1)

(57) [Scope of request for utility model registration] An upper revolving structure is mounted on a lower traveling structure,
The cab and counterweight mounted on the upper revolving superstructure are cut into a chamfered shape by obliquely observing the front side corners of the cab from above, so that the cab and counterweight are arranged within the vehicle width circle of the lower traveling superstructure. A cab of an in-vehicle revolving construction machine having an oblique front surface and a sash extending between the front of the cab and the oblique front surface, the front sash having a rectangular cross section as viewed from above. A cab for a construction machine, wherein the front sash is formed so as to extend from the front surface of the cab to the oblique front surface.