JPH0676592U - Operator cab open / close window seal structure - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To ensure waterproofness between the operator cab of construction machinery and the upper front window or lower front window, and to ensure good sealing between the upper front window and lower front window. . [Structure] Of the front windows of the operator cab 1, the lower front window is fixed to a U-shaped window frame 3A that is open upwards with a sealing rubber 3B interposed therebetween to secure a window glass 3C, and the sealing rubber is slightly cut off from the window frame and the window glass. And a sponge rubber 3D that is easily deformed and has excellent watertightness is provided so as to protrude from the end faces of the window frame and the window glass, and the lower front window is in contact with the upper front window. The sealing rubber interposed between the contact surfaces can be sealed without being strongly pressed, and the sealing rubber comes into contact with the inside of the sealing rubber at the upper and lower surfaces, and the sponge rubber having a gap in the front and rear is inserted, and further, the operator cab and the upper front window or lower portion. A cab sponge rubber 6 is provided between the front window and the cab seal rubber 1A to prevent rainwater from entering.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front window of an operator cab of a construction machine or the like, and more particularly to a seal structure for a front window of an operator cab in which the front window is composed of an upper front window and a lower front window, and the upper front window can be slidably opened and closed. It is a thing.

[0002]

[Prior art]

 Conventionally, the front window of the operator cab of construction machinery etc. has been an open / close type from the viewpoint of workability and visibility environment, and especially in the case of hydraulic excavators excavating earth and sand, the field of view below the front is required, therefore the front window Is divided into an upper part and a lower part, and is formed in a substantially V shape, the lower front window is fixed or removable, and the upper front window is slidable. Therefore, a cab seal rubber is interposed between the operator cab and the upper front window or lower front window to prevent rainwater from entering (FIG. 5), and a seal rubber is provided between the upper front window and the lower front window. (Fig. 6)

On the other hand, in the lower front window, the window glass is fixed by interposing a seal rubber in a U-shaped window frame that is open upward, but the upper end in contact with the upper front window is a window frame, a seal rubber, and a window glass. The fact that they are substantially flush is the best in terms of sealing performance. However, in reality, it is difficult to make the above three surfaces flush with each other, so that it is necessary to strongly press the interposing seal rubber in order to enhance the sealing property of the abutting surfaces of the upper front window and the lower front window. Since the front part of the rubber seal protrudes forward and deforms the cab seal rubber, gaps A and B are created between the cab seal rubber and the window frame of the upper front window and the seal rubber, resulting in poor sealing performance and intrusion of rainwater. Raised points. (Fig. 6)

[0004]

[Problems to be solved by the device]

 The present invention has been made in view of the above facts, and its purpose is to ensure good sealing performance of the contact surface without pressing it too strongly when the upper front window is brought into contact with the lower front window. The purpose is to ensure good sealing between the cab and the upper front window or the lower front window.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, among the front windows of the operator cab, the lower front window is fixed to the U-shaped window frame which is open upwards with the sealing rubber interposed therebetween, and the sealing rubber is fixed to the U-shaped window. It is constructed so that it is slightly retracted from the end faces of the frame and the window glass, and a sponge rubber that is easily deformable and has excellent water-tightness is provided on the back part so that it projects from the end faces of the U-shaped window frame and the window glass. When the upper front window is brought into contact with the front window, sealing is possible without pressing the sealing rubber interposed in the contact surface strongly, and the upper and lower surfaces are brought into contact with the inside of the sealing rubber and a sponge rubber with a gap in the front and back is inserted. Further, a cab sponge rubber was provided between the operator cab and the upper front window or the lower front window in addition to the cab seal rubber.

[0006]

[Action]

 As a result of the sponge rubber, which is easily deformable and has excellent watertightness, protruding from the end faces of the U-shaped window frame and the window glass, when the upper front window comes into contact with the lower front window, Sufficient sealing performance can be ensured without pressing the intervening seal rubber strongly, and sponge rubber is abutted on the upper and lower surfaces inside the hollow seal rubber provided on the abutting surfaces of the upper front window and the lower front window. Since the seal rubber is inserted so that there is a gap in the front and back, it is possible to prevent the seal rubber from protruding to the front. Furthermore, by providing a cab sponge rubber in the position adjacent to the cab seal rubber of the operator cab, the sealing performance is improved and rainwater intrusion is achieved. Made it possible to completely prevent.

[0007]

【Example】

 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 that fixes and seals the window glass 2B. The lower end of the window frame 2A is hollow at the contact surface with the lower front window 3. The rubber seal 4 is fixed by bolts 5 and the like. A cab seal rubber 1A is fixed to the contact surfaces of the upper front window 2 and the lower front window 3 of the operator cab 1 to enable the operator cab 1 and the upper front window 2 to the lower front window 3 to be hermetically sealed. A cab sponge rubber 6 is fixed to the operator's cab 1 at a position adjacent to the cab seal rubber 1A on the contact surface with the upper front window 2 and the lower front window 3 in order to improve the performance. On the other hand, in the lower front window 3, the window glass 3C is fixed to the U-shaped window frame 3A which is open upward through the seal rubber 3B, and the upper ends of the window frame 3A and the window glass 3C are substantially flush with each other. The frame 3A and the window glass 3C are configured so as to be slightly restrained from the upper ends thereof, and a sponge rubber 3D which is easily deformed and has excellent watertightness is provided on the back portion so as to project from the upper ends of the window frame 3A and the window glass 3C. ing. 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, and is inserted so as to have a front and rear gap.

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 mounted. In order to close the upper front window 2 and to ensure the sealing performance between the upper front window 2 and the lower front window 3 or the operator cab 1, the upper front window 2 is pressed against the lower front window 3 which is opened upward with an appropriate pressing force. Although necessary, it is possible to easily seal the lower front window 3 with a slight pressing force due to the presence of the sponge rubber 3D which is easily deformed and has excellent watertightness. Further, since the hollow seal rubber 4 fixed to the lower end of the upper front window 2 is brought into abutment with the upper and lower surfaces and the sponge rubber 7 having a gap in the front and the back is inserted, the deflection of the seal rubber 4 can be reduced, and the seal rubber 4 can be reduced. 4 can be prevented from projecting forward, and a gap between the seal rubber 4, 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, when the seal rubber 3B to the sponge rubber 3D of the lower front window 3 come into contact with the cab seal rubber 1A, the cab sponge rubber 3A is also attached. The window frame 3A of the lower front window 3 comes into contact with the sponge rubber 6 and is double-sealed to completely prevent the intrusion of rainwater. Further, waterproofing between the operator cab 1 and the upper front window 2 is also possible by the cab sponge rubber 6.

[0009]

[Effect of device]

 This invention has the structure described in detail in the above-mentioned one embodiment, which prevents rainwater from entering the operator cab 1, particularly between the upper front window 2 and the lower front window 3 and between them and the cabin seal rubber 1A. It has remarkable effects such as preventing the infiltration of rainwater.

[Brief description of drawings]

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

FIG. 2 is a perspective view of an operator cab of the lower front window or an upper front window contact portion according to the present invention.

FIG. 3 is a sectional view of the same.

FIG. 4 is a cross-sectional view of the upper front window and the lower front window contact portion according to the present invention.

FIG. 5 is a perspective view of a conventional operator cab of the lower front window or an upper front window contact portion.

FIG. 6 is a cross-sectional view of a conventional upper front window and lower front window contact portion.

[Explanation of symbols]

 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

Front page continued (72) Inventor Ryusei Kawahara 1-1-1 Shiohama, Kawasaki-ku, Kawasaki-shi, Kanagawa Press Industry Co., Ltd. (72) Yoshinobu Miyake 1-1-1 Shiohama, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Industry Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A front window of a construction machine or the like comprising an upper front window that can be slidably opened and closed and a lower front window that can be fixed or detached, and a contact surface of the upper front window (2) with the lower front window (3). A sealing rubber (4) is fixed to the lower front window (3), and a sealing rubber (3B) is provided slightly above the upper end of the U-shaped window frame (3A) of the lower front window (3). ) Is attached to the window glass (3C), and a sponge rubber (3D) that is easily deformable and has excellent watertightness is projected from the window frame (3A) to the upper edge of the window glass (3C). The front window of the operator cab, which is characterized by being provided. 2. The hollow seal rubber (4) is fitted with a sponge rubber (7) which is in contact with the seal rubber (4) at the upper and lower surfaces thereof and has a gap in the front and rear thereof. Front window of the listed operator cab. 3. A cab seal rubber (1A) to a cab sponge rubber (6) are disposed on the contact surfaces of the operator cab (1) with the upper front window (2) to the lower front window (3). The front window of the operator cab according to claim 1 or 2.