JP2553142Y2 - Operator cab opening / closing window seal structure - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention relates to an operator cab for a construction machine or the like, in which the front window is composed of an upper front window and a lower front window, and the upper front window is slidably openable and closable. And a seal structure of the front window.

[0002]

2. Description of the Related Art Conventionally, a front window of an operator cab of a construction machine or the like is of an open / close type in terms of workability, visibility environment, and the like.
A lower front view is required, so the front window is divided into an upper part and a lower part, and is formed into a substantially U-shape. The lower front window is fixed or detachable, and the upper front window is slidable. Have been. Therefore, the contact surface between the operator cab and the upper front window or the lower front window is provided with a cab seal rubber (FIG. 5) for preventing infiltration of rainwater, and a seal rubber is provided between the upper front window and the lower front window. (FIG. 6)

[0003] On the other hand, the lower front window has a U-shaped window frame which is opened upward with a seal rubber interposed therebetween to fix the window glass, but the upper end in contact with the upper front window is substantially formed of the window frame, the seal rubber, and the window glass. Being flush is the best in terms of sealing. However, in reality, it is difficult to make the above-mentioned three planes even, so that it is necessary to strongly press the interposed sealing rubber in order to enhance the sealing property of the contact surface between the upper front window and the lower front window, and as a result, the sealing rubber is required. A front portion of the boss protrudes forward to deform the cab seal rubber, and a gap A is formed between the cab seal rubber and the window frame of the upper front window and the seal rubber.
B was generated, and the sealing performance was deteriorated, causing problems such as infiltration of rainwater. (FIG. 6)

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object the purpose of making the upper front window abut against the lower front window without exerting too much pressure on the corresponding contact surface to achieve good sealing. It is an object of the present invention to ensure airtightness and to ensure good sealing between the operator cab and the upper front window or the lower front window.

[0005]

In order to achieve the above object, according to the present invention, among the front windows of the operator cab, a lower front window is fixed to a U-shaped window frame which is opened upward with a sealing rubber interposed therebetween to fix a window glass. Then, the seal rubber is configured so as to be slightly recessed from the end faces of the U-shaped window frame and the window glass, and a sponge rubber that is easily deformed and has excellent water tightness is formed on the recessed portion. When the upper front window abuts against the lower front window, sealing can be performed without strongly pressing the seal rubber interposed on the corresponding contact surface, and the upper and lower surfaces abut against the inside of the seal rubber. And a cab sponge rubber is provided between the operator cab and the upper front window or lower front window in addition to the cab seal rubber.

[0006]

[Function] The sponge rubber, which is easy to deform and has excellent water-tightness, is provided by projecting from the U-shaped window frame and the end surface of the window glass. Sufficient sealing can be ensured without strongly pressing the seal rubber interposed on the surface, and the sponge rubber is placed vertically on the inside of the hollow seal rubber provided on the contact surface between the upper front window and the lower front window. The seal rubber is prevented from protruding forward because it is in contact with and has a gap in front and back, and furthermore, cab sponge rubber is provided adjacent to the cab seal rubber of the operator's cab to improve the sealing performance and to infiltrate rainwater. Complete prevention.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. An operator cab 1 has an upper front window 2 slidably opened and closed and a lower front window 3 fixedly or detachably mounted on the front surface of the operator cab 1. The upper front window 2 is composed of a window frame 2A, a window glass 2B, and a window frame rubber 2C for fixing and sealing the window glass 2B. The lower end of the window frame 2A is hollow at the contact surface with the lower front window 3. Seal rubber 4 is fixedly provided by bolts 5 or the like. A cab seal rubber 1A is fixed to the contact surface between the upper front window 2 and the lower front window 3 of the operator cab 1 to enable the operator cab 1 to be sealed with the upper front window 2 to the lower front window 3 and at the same time to improve the sealing performance. Upper front window 2 and lower front window 3 to enhance
The cab sponge rubber 6 is fixed to a contact surface of the operator cab 1 at a position adjacent to the cab seal rubber 1A. On the other hand, the lower front window 3, glazing 3C shown in FIG. 2c through a shaped <br/> sealing rubber 3B co upper opening shown in FIG. 2b the shape window frame 3A of the U of the upper opening shown in FIG. 2a Is fixed, and the upper ends of the window frame 3A and the window glass 3C are substantially flush with each other, and the sealing rubber 3B is configured to be slightly lowered from the upper ends of the window frame 3A and the window glass 3C. The sponge rubber 3D shown in FIG. 2d having excellent watertightness is provided so as to protrude from the upper end surfaces of the window frame 3A and the window glass 3C. Further, a sponge rubber 7 abuts on the upper and lower surfaces of the seal rubber 4 inside the hollow seal rubber 4 fixed to the lower end of the upper front window 2 so as to have a gap in front and rear.

Next, the operation of the present invention will be described. The lower front window 3 is usually fixed to the operator cab 1, and the upper front window 2 is slidably opened and closed. Upper front window 2
To close the upper front window 2 and the lower front window 3 or the operator cab 1, it is necessary to press the upper front window 2 against the upper front opening lower front window 3 with an appropriate pressing force. It is easy to change the shape of the lower front window 3
In addition, due to the presence of the sponge rubber 3D having excellent watertightness, sealing can be performed with a small pressing force. Furthermore, since the sponge rubber 7 having a gap at the front and rear is fitted into the hollow seal rubber 4 fixed to the lower end of the upper front window 2 at the upper and lower surfaces, the warp of the seal rubber 4 can be reduced. 4 can be prevented from protruding forward, and the gap between the seal rubber 4 and the cab seal rubber 1A and the window frame 2A of the upper front window 2 to the seal rubber 3B of the lower front window 3 can be reduced, so that rainwater can be prevented from entering. On the other hand, since the cab sponge rubber 6 is provided adjacent to the cab seal rubber 1A of the operator cab 1, when the lower front window 3 is fixed, the seal rubber 3B to the sponge rubber 3D of the lower front window 3 abut the cab seal rubber 1A and the cab sponge rubber. The window frame 3A of the lower front window 3 abuts on 6 and is double-sealed to completely prevent rainwater from entering. Operator cab 1
The cab sponge rubber 6 can also provide waterproofing between the cab sponge rubber 2 and the upper front window 2.

[0009]

According to the present invention, it is possible to prevent rainwater from entering the operator's cab 1, particularly between the upper front window 2 and the lower front window 3 and between them and the cab seal rubber by the structure described in detail in the above embodiment. It has a remarkable effect, such as the prevention of rainwater infiltration with 1A.

[Brief description of the drawings]

FIG. 1 is a perspective view of an operator cab employing the present invention.

2 is a perspective view of the operator cab of the lower front window and the upper front window abutting portion according to the present invention (as viewed from the inside of the operator cab in the direction of arrows XX in FIG. 1).

FIG. 3 is an overall perspective view of a window frame 3A constituting a lower front window according to the present invention.

FIG. 4 is an overall perspective view of the seal rubber 3B constituting the lower front window according to the present invention.

FIG. 5 shows a window glass 3 constituting the lower front window according to the present invention .
Overall perspective view of C

FIG. 6 is a perspective view of the sponge rubber 3D constituting the lower front window according to the present invention.

FIG. 7 is a cross-sectional view of the lower front window and the operator cab contact portion according to the present invention (a view taken along the line YY in FIG. 2).

FIG. 8 is a vertical cross-sectional view of the upper front window and the lower front window contacting portion according to the present invention (a view taken along the line ZZ in FIG. 1).

FIG. 9 is a perspective view of a conventional operator cab of a lower front window and a contact portion of an upper front window.

FIG. 10 is a longitudinal sectional view of a conventional upper front window and lower front window contact portion.

[Explanation of symbols]

 Reference Signs List 1 operator cab 1A cab seal rubber 2 upper front window 2A window frame 2B window glass 3 lower front window 3A window frame 3B seal rubber 3C window glass 3D sponge rubber 4 seal rubber 6 cab sponge rubber 7 sponge rubber

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshinobu Miyake 1-1-1 Shiohama, Kawasaki-ku, Kawasaki-shi, Kanagawa Press Industry Co., Ltd. (56) References JP-A-3-244781 (JP, A) 59-73 (JP, U) Actually open 1987-71013 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A front face of an upper front window (2) in contact with a lower front window (3) of a construction machine or the like comprising a slidable open / close upper front window and a fixed or detachable lower front window. On the other hand, a seal rubber (3B) is provided on the U-shaped window frame (3A), which is open above the lower front window (3), slightly in front of the upper end of the window frame (3A). ), The sponge rubber (3D), which is easy to deform and is excellent in watertightness, is projected from the upper ends of the window frames (3A) to (3C). The front window of the operator cab, which is provided. 2. A sponge rubber (7) having upper and lower surfaces abutting on said seal rubber (4) and having a gap in front and rear, inside a hollow seal rubber (4). The front window of the described operator cab. 3. A cab seal rubber (1A) to a cab sponge rubber (6) are provided on the contact surface of the operator cab (1) with the upper front window (2) to the lower front window (3). A front window of the operator cab according to claim 1 or 2.