JPH08100443A - Cab for construction machine - Google Patents

Abstract

PURPOSE: To allow a driver to get on or off at a narrow site by openably fitting the vertically split front window of a cab via hinge connection or independently. CONSTITUTION: The upper section 10a and lower section 11a of the front window of the driver's cab 6a of a hydraulic shovel are rotatably connected via hinges 21a, and they are slidingly opened or closed along guide rails 14 by wires 18 driven by a motor 19. An outer switch 12 or an inner switch 20 is operated, the upper and lower windows 10a, 11a are opened to the prescribed position, the lower window 11a is rotated inward or outward, and a driver gets on or off. The upper window 10a and the lower window 11a are independently opened to form an entrance. The driver can get on or off without being hindered by a control box located on the side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab for a driver's cab, which is mainly installed in construction machines such as hydraulic excavators and work vehicles.

[0002]

2. Description of the Related Art FIG. 8 is a perspective view showing a mechanism for fully opening a windshield 2 of a cabin 1 disclosed in Japanese Utility Model Laid-Open No. 5-57048. In the cabin 1 shown in FIG.
In an excavating work machine, a vertical pivoting fulcrum of a main boom is provided on a side of a cabin 1 that covers an operator's seat space, and a windshield 2 of the cabin 1 is a center of rotation on a side where the main boom is disposed. As a result, it is configured such that it can be pivotally opened about 90 ° forward, and can be slidably stored on the side surface side of the cabin 1 at the open position. FIG. 9 shows Japanese Patent Laid-Open No. 6-242.
It is a perspective view of the cabin 60 disclosed by the 43rd gazette. In the cabin 60 shown in FIG. 9, a substantially uniform curve is formed from the front of the cabin 60 to the ceiling, and the window glass 4 is guided along the guide rails 3 provided on both sides of the front of the cabin 60 and the cable 5 is driven by the driving device a. It is designed to open and close in the vertical direction via.

[0003]

Conventionally, an entrance / exit of a driver's cab of a hydraulic excavator is provided on a side surface of a cab. However, there is a control box (not shown) equipped with a work lever on the front side of the driver's seat, and when it is difficult for the driver to get on and off when working on a site where the hydraulic excavator is narrow. There is. Therefore, various means for getting on and off from the front side of the cab are taken into consideration. For example, in one embodiment shown in FIG. 8, when the windshield 2 is opened forward, the windshield 2 interferes with the main boom or bucket. There is a risk of contact, and the condition is not good. Further, in the other embodiment shown in FIG. 9, it is difficult to form the lower portion (the portion indicated by the symbol b) of the front surface of the cabin 60 with the same curvature because of the vertical length of the window glass 4 and the opening / closing stroke movement amount. is there. Therefore, even if the window glass 4 is opened, a plate-like object remains at the lower part of the opened portion, so that it cannot be used as an entrance / exit. It is an object of the present invention to provide a cab for a construction machine that can solve the above problems.

[0004]

A first embodiment cab of the present invention has an upper front window and a lower front window on the front side of the cab,
In addition, a pair of left and right roller guide rails parallel to the inner wall surface of the cab are provided, and the upper front window with the rollers guided along the roller guide rails is driven by power via a cable to drive the cab ceiling. An upper end of the lower front window was hinged to a lower end of the upper front window so that the upper end of the lower front window was rotatable in either one of an inward direction and an outward direction of the cab.

The cab of the second embodiment of the present invention is provided with an upper front window and a lower front window on the front side of the cab, and a pair of left and right roller guide rails parallel to the inner wall surface of the cab are arranged. The upper front window with rollers guided along the rails is driven by power via a cable so that it can be moved to the storage position on the inner surface side of the cab ceiling.
The lower front window is hinged to the lower part on the front side of the cab so that the lower front window can rotate downward toward the front side.

The cab of the third embodiment of the present invention has an upper front window and a lower front window on the front side of the cab, and a pair of left and right roller guide rails parallel to the inner wall surface of the cab are arranged. The upper front window with rollers guided along the rails is driven by power via a cable so that it can be moved to the storage position on the inner surface side of the cab ceiling.
The upper edge of the lower front window was connected to the lower edge of the upper front window.

The cab of the fourth embodiment of the present invention is a cab for a driver's cab having an upper front window and a lower front window on the front side.
The front part of the cab is formed so as to be fully open from the upper edge part to the lower edge part, and the upper front window is turned upward and the lower front window is turned downward in the front part of the fully opened state. It was movably hinged.

[0008]

In the cab of the first embodiment of the present invention, the upper front window is moved to the storage position on the inner surface side of the cab ceiling by the switch operation of the hoisting drive motor for the cable connected to the upper front window. be able to. Then, when the lower front window hinged to the lower end of the upper front window is bent and rotated in either one of the inward direction and the outward direction of the cab, the front portion of the cab is opened to the full open state. Therefore, the front part of the cab can be set to the driver's entrance / exit.
The switches are provided inside and outside the cab. In addition, devices, levers, etc. that hinder the entry and exit of the driver are not arranged in front of the driver's seat inside the cab, and the driver can enter and exit with the crawler upper surface as a step.

Next, regarding the cab of the second embodiment, the difference between the cab of the second embodiment and the cab of the first embodiment is that the lower front window can be pivoted downward to the front side so that the cab on the front side of the cab can be rotated. That is, it was hinged to the bottom. Therefore, by operating the switch, move the upper front window to the storage position on the inner side of the cab ceiling,
In addition, by rotating the lower front window toward the lower front side, the front portion of the cab can be opened to the fully open state. That is, the front part of the cab can be set as the driver's entrance / exit.

Next, regarding the cab of the third embodiment, the difference between the cab of the third embodiment and the cab of the first embodiment is that the upper edge of the lower front window is connected to the lower edge of the upper front window. Is. Therefore, by moving both the upper front window and the lower front window to the inner surface side of the cab ceiling by the switch operation, the front portion of the cab can be opened to the fully opened state or an opened state close to the fully opened state. Therefore, the front part of the cab can be set to the driver's entrance / exit.

Next, in the cab of the fourth embodiment, an upper front window is pivotally attached to the front portion formed in a fully opened state so that the upper front window is rotatable upward and the lower front window is rotatable downward toward the front side. As a result, by rotating the upper front window and the lower front window respectively upward and downward on the front side, the front portion of the cab can be opened to the fully open state. That is, the front part of the cab can be set as the driver's entrance / exit.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a hydraulic excavator equipped with a cab 6a according to a first embodiment of the present invention. In the figure, 7 is a lower traveling body of the hydraulic excavator, 8 is a crawler wound around the lower traveling body 7, 9 is an upper swing body, and 10a is a cab 6.
an upper front window provided on the front surface of a, a lower front window 11a,
12 is an external switch provided on the outer periphery of the cab 6a,
Reference numeral 3 denotes a work attachment mounted on the front portion of the upper swing body 9. FIG. 2 is a vertical cross-sectional view of the main part of the cab 6a in FIG. In the figure, 14 is a cab 6a
Roller guide rails disposed in parallel to the inner wall surfaces on the left and right of the vehicle, 15 is a cable guide rail, and 16 is an upper front window 10.
Rollers provided at the side edges of the four corners of a, 17 are lock motor portions for locking the upper front window 10a at arbitrary positions along the roller guide rails 14, and 18 is the upper front window 10.
A cable connected to a, 19 is an electric or hydraulic drive motor for hoisting and unwinding the cable 18, 20 (shown by phantom lines) is an internal switch provided inside the cab 6a, and 21a is an upper front window 10a. On the other hand, the hinge member has a lower front window 11a hinged thereto. FIG. 3 is a vertical cross-sectional view of the main part when the front surface of the cab 6a of FIG. 2 is in a fully open state. FIG. 4 is a vertical cross-sectional view of the main part of a modified cab 6'a of the first embodiment of the present invention. In the figure, the same reference numerals are given to those using the same constituent elements as the cab 6a of the first embodiment. 11'a is a lower front window and 21'a is a hinge member.

The structure and operation of the cab 6a according to the first embodiment of the present invention will be described with reference to FIGS. Cab 6 of the first embodiment
a is a roller which has an upper front window 10a and a lower front window 11a on the front side, and is provided with a pair of left and right roller guide rails 14 parallel to the inner wall surface of the cab, and is guided along the roller guide rails 14. Upper front window 10a with 16
Is driven by a drive motor 19 via a cable 18 so as to be moved to the inner side storage position of the cab ceiling, and the upper end of the lower front window 11a is attached to the lower end of the upper front window 10a in the inward direction of the cab 6a. The hinge member 21 is rotatable.
I had a butterfly at a. Thereby, the internal switch 20 or the external switch 12 (shown in FIG. 1) is operated to drive the drive motor 19
The upper front window 10a is moved to the storage position on the inner surface side of the cab ceiling by rotating the lower front window 11a to the cab 6.
When the hinge member 21a is bent and rotated in the inward direction of a (the direction of arrow a in FIG. 3), the front portion of the cab 6a is in a fully opened state (the vertical opening dimension is as shown in FIG. 3). Ha). Therefore, the front portion of the cab 6a can be set as the driver's entrance / exit. In the modified cab 6'a (shown in FIG. 4) of the first embodiment of the present invention, the upper front window 10a is moved to the inner side storage position of the cab ceiling, and the lower front window 11'a is moved to the cab 6'a. When the hinge member 21'a is bent and rotated in the outer direction (the direction of arrow B shown in FIG. 4), the front portion of the cab 6'a is in a fully opened state (the vertical opening size is shown in FIG. 4). Thus, the dimension becomes H'a). Therefore, the front portion of the cab 6'a can be set as the driver's entrance / exit.

Next, FIG. 5 shows a cab 6 according to a second embodiment of the present invention.
It is a principal part vertical cross section of b. In the figure, the same reference numerals are given to those using the same constituent elements as the cab 6a of the first embodiment. The structure and operation of the second embodiment cab 6b will be described with reference to FIG. The difference between the cab 6b of the second embodiment and the cab 6a of the first embodiment is that the lower front window 11b is pivotable downward toward the front (in the direction of arrow C shown in FIG. 5) so that the front side of the cab 6b can be rotated. The hinge member 22 hinges to the lower part of the. Therefore, the internal switch 20 or the external switch (not shown, but the external switch 12 shown in FIG.
(The same as the above), the upper front window 10b is moved to the storage position on the inner surface side of the cab ceiling, and the lower front window 11b is rotated around the hinge member 22 in the direction of the arrow C. Is in a fully opened state (the opening dimension in the vertical direction is the dimension Hb as shown in FIG. 5). Therefore, the front portion of the cab 6b can be set as the driver's entrance / exit.

Next, FIG. 6 shows a cab 6 according to a third embodiment of the present invention.
It is a principal part vertical cross section of c. In the figure, the same reference numerals are given to those using the same constituent elements as the cab 6a of the first embodiment. 14 'and 15' are roller guide rails, cable guide rails, which are extended to the rear, respectively,
Reference numeral 23 is a connecting member. Next, the configuration and operation of the third embodiment cab 6c will be described with reference to FIG. The cab 6c of the third embodiment differs from the cab 6a of the first embodiment in that the lower front window 11
The upper end edge of c is connected to the lower edge of the upper front window 10c by the connecting member 2
That is, it was connected in 3. Therefore, internal switch 2
0 or an external switch (not shown, but the same as the external switch 12 shown in FIG. 1) is operated to operate the upper front window 10c.
By moving both the lower front window 11c and the inner front side of the cab ceiling, the front part of the cab 6c is fully opened,
It is possible to open to an open state close to the full open state (opening dimension in the vertical direction is dimension Hc as shown in FIG. 6).
Therefore, the front portion of the cab 6c can be set as the driver's entrance / exit.

Next, FIG. 7 shows a cab 2 according to a fourth embodiment of the present invention.
It is a principal part perspective view of FIG. In the cab 24, an upper front window 25 is rotatably provided on a front surface of the cab formed in a fully opened state by a hinge member 28 so that the upper front window 25 can rotate upward (in a direction of arrow D), and a lower front window 26 can be formed below a front side (arrow). Each of them is hinged by a hinge member 28 'so as to be rotatable in the direction of (e). Reference numeral 29 shown in FIG. 7 is a gas cylinder for lifting and rotating the upper front window 25. Therefore, the upper front window 25 and the lower front window 2
By rotating 6 upward and downward on the front side, respectively, the front surface of the cab 24 can be opened to a fully open state. That is, the front portion of the cab 24 can be set as the driver's entrance / exit.

[0017]

According to the embodiment of the present invention, a pair of left and right roller guide rails parallel to the inner wall surface of the cab are provided,
The upper front window, which has rollers guided along the roller guide rails, is driven by power via a cable to move to the storage position on the inner side of the cab ceiling. A hinge is attached to the lower end of the window, or a lower front window is separated from the upper front window and is attached to the lower portion of the front side of the cab, which is pivotable downward and forward, or the upper edge of the lower front window. The part was connected to the lower edge of the upper front window. As a result, in the cab in which the upper front window and the lower front window are connected, the switch is simply operated, and in the other cabs, the lower front window is pivotally adjusted together with the switch operation, so that the front portion of the cab is fully opened,
It is possible to open to an open state close to the full open state. Therefore, the front part of the cab can be set to the driver's entrance / exit. In the case of a cab that is hinged so that the upper front window of the cab can rotate upward and the lower front window can rotate downward, the front part of the cab can be opened by rotating both front windows together. It can be opened to the fully open state. That is, the front part of the cab can be set as the driver's entrance / exit. In the hydraulic excavator equipped with the cab of the present invention, the door (the upper front window and the lower front window) on the front of the cab is opened without being disturbed by the control box or the like on the front side of the driver's seat when the driver gets off the vehicle. Then, you can step on the upper surface of the crawler and get off from the entrance. In this case, the door can be automatically opened in a power window manner, which is convenient. And since the upper front window and the lower front window are shared with the door for the entrance and exit, it is not necessary to provide a separate door on the side surface of the cab, and the strength and weight of the cab can be improved and the cab The layout and shape of the side window can be freely set to improve the visibility.

[Brief description of drawings]

FIG. 1 is a perspective view of a hydraulic excavator equipped with a cab of a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the main part of the cab shown in FIG.

FIG. 3 is a vertical cross-sectional view of a main part of the cab shown in FIG. 2 when the front part of the cab is in a fully opened state.

FIG. 4 is a vertical sectional view of a main part of a modified cab of the first embodiment of the present invention.

FIG. 5 is a vertical sectional view of a main part of a cab of a second embodiment of the present invention.

FIG. 6 is a vertical sectional view of a main part of a cab of a third embodiment of the present invention.

FIG. 7 is a perspective view of a main part of a cab of a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing a windshield full-opening mechanism of a cabin of an embodiment of the prior art.

FIG. 9 is a perspective view of another example cabin of the prior art.

[Explanation of symbols]

1, 60 Cabin 2 Windshield 3, 18 Cable 4 Window glass 6a, 6'a, 6b, 6c, 24 Cab 10a, 10b, 10c, 25 Upper front window 11a, 11b, 11c, 26 Lower front window 12 External switch 14 , 14 'Roller guide rail 16 Roller 19 Drive motor 20 Internal switch 21a, 21'a, 22, 27, 27, 28' Hinge member 23 Connecting member

Claims (5)

[Claims] 1. A cab of an operator's cab having an upper front window and a lower front window on a front side thereof, wherein a front portion of the cab is formed in a fully open state from an upper end edge to a lower end edge of the cab. A cab for a construction machine characterized in that an upper front window and a lower front window are both openably and closably attached to the front part of the state. 2. The front side of the cab is provided with an upper front window and a lower front window, and a pair of left and right roller guide rails parallel to the inner wall surface of the cab are provided, and the rollers guided along the roller guide rails. The upper front window equipped with the above is driven by power through a cable so that it can be moved to the storage position on the inner surface side of the cab ceiling, and the upper end of the lower front window is connected to the inside and outside of the cab at the lower end of the upper front window. A cab for a construction machine, wherein the cab is hinged so as to be rotatable in either one of the directions. 3. A front cab of the cab is provided with an upper front window and a lower front window, and a pair of left and right roller guide rails parallel to the inner wall surface of the cab are provided, and the rollers guided along the roller guide rails. The upper front window equipped with the above is driven by power through a cable so that it can be moved to the storage position on the inner surface side of the cab ceiling, and the lower front window can be rotated downward to the front side. A cab for construction machinery characterized by being hinged against. 4. The front side of the cab is provided with an upper front window and a lower front window, and a pair of left and right roller guide rails parallel to the inner wall surface of the cab are provided, and the rollers guided along the roller guide rails. The upper front window equipped with the above is driven by power via a cable so that it can be moved to the inner side storage position of the cab ceiling, and the upper edge of the lower front window is connected to the lower edge of the upper front window. The cab of the characteristic construction machine. 5. A cab for a driver's cab having an upper front window and a lower front window on a front side thereof, wherein a front portion of the cab is formed in a fully opened state from an upper end edge to a lower end edge of the cab. A cab of a construction machine, wherein an upper front window is hinged to a front part of the state so as to be rotatable upward and a lower front window is pivotable downward to a front side.