JPH0655823U - Front window opener for cab for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] Conventionally, the front window of the cab has been provided with a frame frame around the entire outer edge of the windshield. Therefore, since the weight of the front window is large, the hoisting capability of the drive motor of the front window opening / closing device is increased. The drive motor became large, occupying the space in the cab, and was in a bad condition.
Moreover, when the front window is damaged, it cannot be easily removed from the cab. This problem is solved. [Structure] In the front window opening / closing device of the present invention, the upper frame and the lower frame of the front windshield of the front window are respectively
The lower frame frame is fixed and attached, and rollers and the like are attached to the upper and lower frame frames, respectively. In addition, by disconnecting the connecting metal fittings that connect the front window and the cable, and removing the stopper that prevents the front window from moving rearward from the front window open position, the front window can be removed. It can be manually removed to the rear side of the open position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a front window opening / closing device for a cab for a driver's cab, which is installed in construction machines such as hydraulic excavators and work vehicles.

[0002]

[Prior art]

 Although not shown, the conventional front window opening / closing device is provided with a front window in the front part of the cab for construction machinery, and the front window is driven by a drive motor via a cable by a switch operation. It is opened and closed by moving it to the front window open position on the inside of the cab ceiling.

[0003]

[Problems to be solved by the device]

 Conventionally, the front window of the cab has been provided with a frame around the entire outer edge of the windshield. Because of this, the weight of the front window is large, and the hoisting capability of the drive motor of the front window opening / closing device was increased. The drive motor became large, occupying the space in the cab, which could be an obstacle. In addition, there were not enough measures taken to easily remove the front window from the cab when the front window was damaged. The present invention aims to solve the above problems.

[0004]

[Means for Solving the Problems]

 The front window opening / closing device of the present invention is provided with a front window on the front portion of the cab, and the windshield of the front window is formed into a curved surface curved in a substantially arc shape and extends from the front surface to the upper surface of the cab. A side view shape is formed on the curved surface that extends along the front window over the moving range of the front window, and the left and right roller guide rails parallel to the inner wall surface of the cab are arranged. The front window with the guide rails and the rollers guided along the roller guide rail at the four corners is driven by the power source via the cable that passes through the cable guide rail, and the front of the cab is in front. A front window opening and closing device that is opened and closed by moving it between a window closing position and a front window opening position on the inner side of the cab ceiling. Upper end of Fine lower end, each upper frame frame, fixedly attached to the lower framework was constructed by attaching a component equipment accessories such as the respective roller against the upper and lower frame edge. In addition, by releasing the connection of the connecting bracket that connects the front window and the cable, and removing the stopper that prevents the front window from moving rearward from the front window open position, It can be manually removed to the rear of the window opening position.

[0005]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of a main part of a cab 1 having a front window opening / closing device of the present invention. In the figure, 2 is a front window, 3 is an upper roller among the rollers provided at the four corners, 3'is a lower roller, 4 is a lock motor, 5 is a roller guide rail provided on the left and right inner wall surfaces of the cab 1, and 6 is a roller guide rail. Is a cable guide rail, 7 is a cable, 8 is a drive motor for winding and lowering the cable 7, 9 is the windshield of the front window 2, R is the radius of curvature of the curved surface of the windshield 9, and a is the front window 2. The window closing position, b (the hatched portion), is the front window opening position of the front window 2. FIG. 2 is a view seen from AA of FIG. 1, but the front window opening / closing device of the present invention is formed symmetrically. FIG. 3 is a side view of the front window 2. In the figure, 10 is an upper frame frame of the front window 2, 11 is a lower frame frame, and 12 is an L-shaped lever for locking and fixing the front window 2. FIG. 4 is a front view seen from B of FIG. In the figure, reference numeral 13 is a connecting fitting for connecting the lower frame frame 11 of the front window 2 and the cable 7. FIG. 5 is a side view of an essential part showing the connecting fitting 13 as seen from CC of FIG. In the figure, 14 is a front window side bracket metal fitting of the connecting metal fitting 13, 15 is a cable side bracket metal fitting, 16 is a long hole formed in the cable side bracket metal fitting 15, 17 is a bolt, and 18 is a cable terminal stopper. FIG. 6 is a view seen from D in FIG. In the figure, 19 is a screw hole (for the bolt 17) opened in the front window side bracket fitting 14. FIG. 7 is a side view of essential parts showing a state in which the bolt 17 in FIG. 5 is loosened and removed to disconnect the coupling fitting 13.

Next, the configuration of the front window opening / closing device of the present invention will be described with reference to FIGS. The front window opening / closing device of the present invention is provided with a front window 2 on a front portion of a cab 1, and a windshield 9 of the front window 2 has a substantially arc-shaped side view (as shown in FIGS. 1 and 3). The radius of curvature is R), and the side view shape from the front surface to the upper surface of the cab 1 is formed into a curved surface that extends along the front window 2 over the moving range of the front window 2. Left and right roller guide rails 5 parallel to the inner wall surface of the hub 1 are arranged, and cable guide rails 7 are arranged along the roller guide rails 5 and guided along the roller guide rails 5. The front window 2 having an upper roller 3 and a lower roller 3'that are driven by a drive motor 8 via a cable 7, and the front window closing position B (shown in FIG. 1) on the front of the cab (1) and the cab. (1) Move to the front window open position b on the inner surface of the ceiling A front window opening / closing device that opens and closes by opening the upper frame frame 10 and the lower frame frame at the upper end and the lower end of the windshield 9 of the front window 2 respectively in order to reduce the weight of the front window. 11 is fixed and attached, and the upper frame frame 10 and the lower frame frame 11 are provided with attached accessory devices such as the upper roller 3 and the lower roller 3 ', respectively. Further, a stopper 20 (Fig. 1) is provided to release the connection of the connecting metal fitting 13 connecting the front window 2 and the cable 7 and to prevent the front window 2 from moving rearward from the front window closing position (b). The front window 2 can be manually removed to the rear side of the front window opening position B by removing (1).

Next, the operation of the front window opening / closing device of the present invention will be described. In the front window 2 of the present invention, an upper frame frame 10 and a lower frame frame 11 are attached to the upper and lower ends of a windshield 9, respectively. That is, there is no frame on the left and right side edges of the windshield 9. As a result, the weight of the front window 2 is kept to a minimum, so that the hoisting capacity of the drive motor 8 can be made to correspond to the above weight, and the drive motor 8 can be downsized. Further, even if the front window 2 that is open upward falls to the front window closing position (i) on the front of the cab (1) in an unexpected accident, the impact can be reduced to improve safety. When the front window 2 is removed due to a damage accident or the like, the stopper 20 shown in FIG. 1 is removed and the connection fitting 13 connecting the front window 2 and the cable 7 is released as shown in FIG. , Manually lift in the direction of arrow c. Then, it can be removed along the roller guide rail 5 to the rear side thereof after passing through the front window opening position b on the inner surface side of the cab (1). FIG. 8 is a side view of a main part of the cab 1 showing a state in which the front window 2 is removed. Since the front window 2 is light in weight, it can be easily removed manually along the roller guide rail 5 to the rear side (the side indicated by the reference numeral 2 in FIG. 8).

[0008]

[Effect of device]

 Conventionally, the front window of the cab has been provided with a frame around the entire outer edge of the windshield. Because of this, the weight of the front window is large, and the hoisting capability of the drive motor of the front window opening / closing device was increased. The drive motor became large, occupying the space in the cab, and was in a bad condition. Also, when the front window was damaged, it could not be easily removed from the cab. However, in the front window of the present invention, an upper frame frame and a lower frame frame are attached to the upper end and the lower end of the front glass, respectively. That is, there is no frame on the left and right side edges of the windshield. As a result, the weight of the front window can be minimized, so that the hoisting capacity of the drive motor can be made to correspond to the above weight, and the size of the drive motor can be reduced. Therefore, the outer shape of the drive motor becomes compact and the space can be effectively used. Also, in the event of an unexpected accident, even if the front window that opens upward falls to the front window closing position on the front of the cab, the impact can be reduced and safety can be improved. In addition, if the front window is damaged, the metal fittings that connect the front window and the cable are disconnected, and a stopper is provided to prevent the front window from moving rearward from the front window open position. By removing it, the light front window can be easily removed manually along the roller guide rails to the rear side. Therefore, the front window opening / closing device of the present invention can improve the maintainability and safety of the front window.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a cab having a front window opening / closing device of the present invention.

FIG. 2 is a view seen from AA in FIG.

FIG. 3 is a side view of a front window according to the present invention.

FIG. 4 is a front view seen from B of FIG.

FIG. 5 is a side view of a main part showing the connecting fitting viewed from CC of FIG. 4;

FIG. 6 is a view seen from D in FIG.

7 is a side view of essential parts showing a state where the connection of the connection fitting in FIG. 5 is released.

FIG. 8 is a side view of the main part of the cab showing a state in which the front window is removed according to the present invention.

[Explanation of symbols]

 1 Cab 2 Front Window 3 Upper Roller 3'Lower Roller 5 Roller Guide Rail 7 Cable 8 Drive Motor 9 Windshield 10 Upper Frame Frame 11 Lower Frame Frame 13 Connecting Metal Fitting 20 Stopper

Claims (2)

[Scope of utility model registration request] 1. A front window is provided in a front portion of a cab, and a side view shape of a windshield of the front window is formed into a curved surface curved in a substantially arc shape. A curved surface is formed along the front window over the moving range of the front window, and left and right roller guide rails parallel to the inner wall surface of the cab are arranged, and cable guide rails are arranged along the roller guide rails. , The front window with rollers guided along the roller guide rail at the four corners is driven by a power source via a cable that passes through the cable guide rail, and the front window closing position on the front of the cab and the inner side of the cab ceiling The front window opening and closing device is adapted to be opened and closed by being moved to and from the front window opening position of the front window of the front window, and the front window opening device for reducing the weight of the front window. This A front window opening and closing device for a cab for a construction machine, characterized in that the upper frame frame and the lower frame frame are fixedly mounted, and accessory components such as rollers are mounted on the upper and lower frame frames, respectively. 2. The front window opening / closing device for a cab for a construction machine according to claim 1, wherein the connection fitting for connecting the front window and the cable is uncoupled, and the front window is the front window. A cab for a construction machine characterized in that the front window can be manually removed to the rear side of the front window opening position by removing a stopper provided so as not to move rearward from the window opening position. Front window opening and closing device.