JP3588858B2 - Cab front window structure - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front window structure of a cab for an operator cab, which is mainly mounted on a construction machine such as a hydraulic excavator or a work vehicle.
[0002]
[Prior art]
FIG. 6 is a perspective view of a hydraulic shovel described in Japanese Utility Model Publication No. 6-21978. As shown in FIG. 6, the driving cabin 2 mounted on the swivel base 1 is formed to have a curved surface in a side view, with its front upper part a being retracted.
[0003]
[Problems to be solved by the invention]
The cab mounted on recent construction machines and working vehicles has a curved surface shape that swells forward when viewed from the front due to design, function, etc. It is formed in the shape of a curved surface inclined backward. A transparent plate (a transparent plate such as glass or synthetic resin material) having a curved surface in a side view conforming to the curved surface is fitted to the front window of the cab in which the field of view on the front surface is set to the maximum. Therefore, when the driver looks at the external work situation or the like, the outside may look distorted. Further, since the transparent plate is formed by bending the curved surface, the transparent plate having a curved surface becomes expensive, and the cab manufacturing cost is poor. An object of the present invention is to provide a cab front window structure that can solve the above-mentioned problems.
[0004]
[Means for Solving the Problems]
In the present invention, it is mounted on a construction machine and work vehicles like, after the side view shape of the upper portion front surface of the side view shape cab for a driver chamber formed in a curved surface shape such as swelling forward or in front, A flat transparent plate was attached to the front window of the cab of a cab for a driver's cab that was formed in a tilted shape. And, as a mounting structure of the flat transparent plate, a window frame which is formed separately from the support frames on the right and left side edges of the front surface of the cab and is attached between these support frames is provided, and this window frame is provided on the front surface of the cab. And has a curved surface corresponding to the curved surface when viewed from the side, and is formed into a shape into which a flat transparent plate is fitted . In the present invention, it is formed by dividing the flat transparent plate to a small Do Kutomo two upper and lower side. In the present invention, a window frame, which is a frame of the flat transparent plate, is formed by press working, and the window frame is provided between the front surface of the cab and the flat transparent plate.
[0005]
[Action]
According to the present invention, since the flat transparent plate of the cab for the cab, which is mounted on a construction machine, a work vehicle, or the like, and has a front surface in a side view formed in a partially or entirely curved shape, is attached, This makes it possible to obtain accurate visibility without distorting the object. Further, as the mounting structure of the flat transparent plate, a flat transparent plate is fitted to a window frame formed on a curved surface corresponding to the curved surface of the front surface of the cab in a side view, and the window frame is formed on the left and right side edges of the cab front side. Since the flat transparent plate is mounted between the support frames, the mounting structure of the flat transparent plate to the front surface of the cab can be strengthened. Since the window frame is formed separately from the support frame, the mold production cost and the processing cost can be reduced. Since formed in small Do Kutomo two divided type upper side and lower side the flat transparent plate, it is possible to plan the transparent plate at low cost, it is possible to enable opening and closing of the front window. Further, in the present invention, since the window frame provided between the cab front surface and the flat transparent plate is formed by press working, the flat transparent plate can be appropriately and easily attached to the curved cab front surface, and the window frame is formed. Mold manufacturing costs can be kept low.
[0006]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall side view of a hydraulic excavator 7 having a front window structure according to the present invention. In the drawing, reference numeral 8 denotes a lower traveling body of the excavator 7, 9 denotes an upper revolving body provided on the upper part of the lower traveling body 8, 10 denotes an upper revolving body 9, and the front upper side has a rearwardly inclined curved surface when viewed from the side. A driver's cab formed in the shape of a cab, 11 is a door for getting on and off the cab 10, and 12 is a work attachment mounted on a front portion of the upper swing body 9. FIG. 2 is a plan view of a partially cut-away main part viewed from A in FIG. In the figure, 13L and 13R are support frames on both right and left side edges on the front side of the cab 10, 14 is a skylight of the cab 10, and a circle S (indicated by a phantom line) is a maximum turning radius around the turning center 0 of the upper turning body 9. A circle drawn with a radius of R. FIG. 3 is a front view of a main part near the cab 10 as viewed from B in FIG. In the figure, 15 is the front window, 16 _U upper flat transparent plate before the window 15 of the cab 10, 16 _L is a lower planar transparent plate. The material of the flat transparent plates 16 _U and 16 _L is glass, synthetic resin, or the like. FIG. 4 is an enlarged view of a portion C in FIG. In the figure, 17 is a window frame of the front window 15, 18 is H-shaped rubber, and 19 is a weather strip. FIG. 5 is a perspective view showing the upper flat transparent plate 16 _U and the window frame 17.
[0007]
Next, a front window structure according to an embodiment of the present invention will be described with reference to FIGS. According to the present invention, the front window 15 (see FIG. 1) of the cab 10 is formed such that the shape of the upper side of the front surface when viewed from the side is a curved surface inclined backward (the state of a substantially arc-shaped curved surface at the portion denoted by reference numeral A in FIG. 3), an upper flat transparent plate _16U and a lower flat transparent plate _16L were attached. As a mounting structure of the flat transparent plate (hereinafter, the upper flat transparent plate _16U will be described as a representative), the mounting structure corresponds to a curved surface in a side view of the front surface of the cab 10 (a curved surface indicated by reference numeral A in FIG. 1). An upper flat transparent plate 16 _U is fitted through a H-shaped rubber 18 to the inside of a window frame 17 formed on a curved surface (the curved surface indicated by the symbol B in FIG. 5), and the window frame 17 is attached to the front side of the cab 10. It mounted between the left and right side edge portions of the strut frame 13 _L and 13 _R. Note fixing means of the strut frame 13 _L, 13 window frame 17 with respect to _R are not shown. In the present invention also a window frame 17 is a frame of the upper planar transparent plate 16 _U shaped by press working, provided the window frame 17 between the cab 10 front and top plan transparent plate 16 _U.
[0008]
Next, the operation of the front window structure of the present invention will be described. In the present invention, the front window 15 of the cab 10 side view shape of the front of the upper side is formed in the rear傾湾curved (shown in FIG. 3), the upper flat transparent plate 16 _U and the lower flat transparent plate 16 _L Is attached, the object in the field of view does not look distorted, and accurate visibility can be obtained. Further, as an attachment structure of the above-mentioned flat transparent plate (hereinafter, the upper flat transparent plate _16U will be described as a representative), H is provided inside a window frame 17 formed on a curved surface corresponding to the curved surface in a side view of the front surface of the cab 10. and fitting the upper planar transparent plate 16 _U through the form rubber 18, so attached to the window frame 17 between the strut frame 13 _L and 13 _R of the right and left side edge portions of the cab 10 the front side, the upper plane transparent plate The structure for attaching the 16 _U cab 10 to the front portion can be made strong. Since the formation of the flat transparent plate to the split type upper planar transparent plate 16 _U and the lower flat transparent plate 16 _L, it is possible to plan the transparent plate at a low cost, open and close operations in the front window 15 (open structure is not shown) Can be made possible. Further, in the present invention, since the window frame 17 provided between the front surface of the cab 10 and the upper flat transparent plate _16U is formed by press working, the upper flat transparent plate _16U is suitable for the curved front surface of the cab 10 and is suitable. The window frame 17 can be easily attached and the cost of manufacturing the window frame 17 can be reduced.
[0009]
【The invention's effect】
According to the present invention, the flat transparent plate is mounted on the cab for the driver's cab, which is mounted on a construction machine, a work vehicle, or the like, and has a partially or entirely curved front surface when viewed from the side. This makes it possible to obtain accurate visibility without distorting the object. Further, as the mounting structure of the flat transparent plate, a flat transparent plate is fitted to a window frame formed on a curved surface corresponding to the curved surface of the front surface of the cab in a side view, and the window frame is formed on the left and right side edges of the cab front side. Since the flat transparent plate is mounted between the support frames, the mounting structure of the flat transparent plate to the front surface of the cab can be strengthened. Since formed in small Do Kutomo two divided type upper side and lower side the flat transparent plate, it is possible to plan the transparent plate at low cost, it is possible to enable opening and closing of the front window. Therefore, in the cab having the front window structure of the present invention, since the driver can secure accurate visibility, it is possible to improve the safety of the cab formed by the curved surface and to reduce the cab manufacturing cost. Can be. Although a person skilled in the art generally considers various means for forming a drawn sheet metal by pressing or the like for the entire cab or the entire front portion of the cab, the cost of manufacturing the mold is extremely high. However, in the present invention, since the window frame is formed as a separate body and only the window frame is pressed, the pressing including complicated three-dimensional processing can be suppressed to a minimum necessary portion. Thereby, it is possible to reduce the mold manufacturing cost and the processing cost. Furthermore, even if the flat transparent plate (so-called windshield) is made to be a slide full-up type by using a separate window frame, the window frame can be moved along the curved shape of the cab. Overhang can be minimized.
[Brief description of the drawings]
FIG. 1 is an overall side view of a hydraulic excavator having a front window structure according to the present invention.
FIG. 2 is a partially cutaway plan view of a main part viewed from A in FIG. 1;
FIG. 3 is a front view of a main part near the cab as viewed from B in FIG. 1;
FIG. 4 is an enlarged view of a portion C in FIG. 2;
FIG. 5 is a perspective view showing an upper flat transparent plate and a window frame in the present invention.
FIG. 6 is a perspective view of a hydraulic excavator according to one embodiment of the prior art.
[Explanation of symbols]
7 Hydraulic excavator 9 Upper revolving structure 10 Cab 13 _L , 13 _R Column frame 15 Front window 16 _U Upper flat transparent plate 16 _L Lower flat transparent plate 17 Window frame

Claims (4)

A cab for a driver's cab that is mounted on construction machinery and work vehicles, etc., and has a curved front surface with a front side shape that swells forward, separate from the support frame on the left and right side edges of the cab front. A window frame formed and attached between the support frames, the window frame having a curved surface corresponding to a curved surface in a side view of the front surface of the cab, and a flat transparent plate fitted inside the curved surface. A cab front window structure formed in a shape to be worn . Mounted on a construction machine or work vehicle, etc. In the cab for a cab side view shape of the upper portion is formed in the rear傾湾curved in front, the post frame and another of the left and right side edge portions of the cab front surface A window frame formed and attached between the support frames, the window frame having a curved surface corresponding to a curved surface in a side view of the front surface of the cab, and a flat transparent plate fitted inside the curved surface. A cab front window structure formed in a shape to be worn . In front window structure claimed cab range claim 1 or claim 2 wherein the front of the cab, characterized in that formed by dividing the flat transparent plate to the two upper and lower side small Do Kutomo Window structure. In front window structure claimed cab range claim 1 or claim 2, wherein the front window structure of the cab, characterized in that it allowed molding the window frame by press working.

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