JP3176166B2 - Operator's cab of construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction of a cab of a construction machine such as a power shovel or a bulldozer.

[0002]

2. Description of the Related Art There are open-type and closed-type cabs for construction machinery. Usually, a user selects a cab type according to a place of use, and a manufacturer selects a cab of a designated type. It is mounted on the body and shipped.

[0003] Even in an open cab, a protection frame 1 for protecting a driver is usually provided as shown in FIG. 6, and this protection frame 1 usually has a ceiling portion 4 and the vehicle falls over. The structure protects the driver from falling objects. The protective frame 1 is formed in a frame shape as shown in FIG. 7, the protective frame 1 is provided with a ceiling plate 6 and a rear plate 20 which cover the driver's head as shown in FIG. Various types of construction machines are used depending on the type of construction machine and work place, such as a construction machine having a side plate 21 together with the construction machine 6. In a bulldozer or the like, a side-reverse L-shaped one having a back plate 20 and a ceiling plate 6 (FIG. 8) is usually used. The front side may be formed in an inverted L shape with the side plate 21 attached to the boom side (FIG. 9). Such a protective frame 1 is provided with a support 22 and a window 23 as needed, and is fixedly attached at its lower end to a frame of a vehicle or a floor panel 11 of a driver's seat.

On the other hand, as shown in FIG. 10, a closed cab is formed in a box shape having a door 8, and a lower side thereof is fixedly mounted on a floor plate 11 of the cab. Since the operation of construction machinery requires a wide field of view, large windows are provided and these windows can be opened and closed and removed as needed. Since the windshield 24 is a self-supporting structure, it needs to have appropriate strength, and is usually structured to have strength at the window frame portion. In addition, since the windshield 24 also needs to have a function of protecting the driver from falling or falling objects of the vehicle, a frame is provided inside the windshield 24 along the window frame, and the frame is used to protect the vehicle from falling or falling objects. The windshield 24 is given sufficient strength to protect the driver.

Whether the construction machine is provided with an open cab shown in FIGS. 7 to 9 or a closed cab as shown in FIG. 10 is designated by a user. The protection frame 1 and the windshield 24 are designed in advance, and one of them is manufactured and attached to the vehicle body according to the selection of the user.

[0006]

In the conventional structure,
The driver's cab protection frame 1 and the draft shield 24 are designed and manufactured as completely separate components, so that the user has to specify the cab type and then start manufacturing the cab. There was a problem that it took. In addition, the self-supporting windshield 24 has a problem that the structure is complicated because it is necessary to secure a sufficient field of view and strength, and the number of parts is large, the production time is long, and the price is high.

Accordingly, the present invention enables the operator's cab of a construction machine to be easily changed between an open type and a closed type, and manufactures an operator's cab with a shorter delivery time for any type of operator's cab. It is an object of the present invention to obtain technical means that can provide a closed cab at a lower cost.

[0008]

In the cab of a construction machine according to the present invention, a protective frame 1 having a ceiling 4 located above the driver's head is fixed to a body of the construction machine or a floor panel 11 of the cab. A fastening element 12 is disposed at a portion surrounding the periphery 5 of the ceiling portion 4 and the driver's seat of the floor plate 11, and a windshield formed of a plate closing an open portion of the protection frame 1. The frame 7 has an anti-vibration rubber 1 at its upper side and lower side.
The driver's cab is fastened to the fastening element 12 via the bracket 5 and is mounted between the floor panel 11 of the driver's cab and the ceiling 4 of the protective frame, and is closed by the protective frame 1 and the windshield frame 7. Then, an open cab is formed by removing the windshield frame 7. When the ceiling portion 4 of the protective frame includes a ceiling plate 6 that covers the driver's head, the windshield frame 7 is a plane that closes the wall around the protective frame 1.
It is formed in a U-shape, and the ceiling part 4 of the protection frame forms the ceiling plate 6
If not provided, the draft shield frame 7 will cover the ceiling and surrounding walls.
It is formed in a box shape with all. The windshield frame 7 can be fixed by fastening its upper side to the ceiling portion 4 of the protective frame from below.

[0009]

The construction machine provided with the cab of the above construction can be shipped by attaching only a protective frame when the user desires an open cab, and a protective frame when the user desires a closed cab. All you have to do is ship with the windshield attached,
The windshield frame is low in strength because the upper and lower sides are held by the ceiling of the protective frame and the floor panel of the driver's cab, and the structure can be simplified compared to the freestanding type, so it is cheap and can be produced in a short time It is possible to Therefore, the maker can easily respond to the user's request, and the user can purchase a construction machine having a desired operator's cab at a lower cost and with a shorter delivery time.

Further, since the windshield frame 7 can be attached and detached relatively easily, and even if it is detached, the safety of the driver can be secured by the protection frame 1, the windshield frame 7 can be attached and detached according to the working environment and the season. Thus, for example, it becomes possible to work in an open type in summer and a closed type in winter.

If the ceiling plate 6 is provided on the protective frame 1 side, the ceiling plate of the windshield frame 7 can be omitted, and not only can the windshield frame 7 be made simpler, but also
The safety when the windshield is removed is also better. In addition, if a structure in which the upper side of the windshield frame 7 is fastened to the ceiling portion 4 of the protection frame from below is used, it is easy for the rainfall between the ceiling portion 4 of the protection frame and the windshield frame 7 to spread.

[0012]

FIG. 1 shows a first embodiment of the present invention. The protection frame 1 has a ceiling portion 4 and a back portion 20 held by two columns 3 provided behind the driver's seat 2. The ceiling portion 4 is stretched between a peripheral edge portion 5 made of a rod material and a space therebetween. Ceiling plate 6 provided. The windshield frame 7 is formed in a flat U-shape, has a sliding door 8 on one side, and the upper part 9 of the front window is moved along a rail 10 provided along the upper side inside the side frame. , Which can be opened upward.

A screw hole 12 is provided at an appropriate position at a position surrounding the periphery 5 formed of the rod material of the ceiling portion 4 of the protective frame and the driver's seat 2 of the floor panel 11 of the cab. Are fastening portions for fixing the windshield frame 7. Windshield frame 7
An upper side and a lower side are formed with an inwardly bent flange portion 13, and a circular hole 14 is provided at a position of the flange portion facing the screw hole 12. 4), and a bolt 16 inserted into the center hole of the vibration isolating rubber is screwed into the screw hole 12, so that the upper and lower sides of the windshield frame 7 are respectively connected to the ceiling 4 of the protective frame and the operation thereof. It is fixed to the floorboard 11 of the room.

The anti-vibration rubber 15 is provided with a ring-shaped iron plate 17 on one side as shown in an enlarged view in FIG. 5, and the iron plate 17 is arranged vertically with the flange portion 13 side of the windshield frame. The protective frame is fastened to the screw holes 12 by bolts 16 while being sandwiched between the ceiling portion 4 of the protective frame or the floor plate 11 of the cab.

FIG. 2 shows a second embodiment of the present invention, which has a structure applied to, for example, a large-sized power shovel. The protective frame 1 is provided on a side plate 21 on the boom side of the driver's seat 2.
And a ceiling plate 6, and a flat U-shaped windshield frame 7 without a ceiling plate is fitted between the ceiling portion 4 and the floor plate 11, and a structure similar to that of the first embodiment is used. The closed cab is formed by fastening the protective frame to the ceiling 4 and the floor plate 11. This embodiment has a structure in which the windshield frame 7 is fitted into the protection frame 1 from the side of the vehicle body (the side where the driver gets on and off), particularly when the structure is used as a driver cab structure of a power shovel. There is a feature that the attachment / detachment becomes very easy.

The third embodiment shown in FIG. 3 is an example in which the protective frame 1 does not have a ceiling plate and a back plate, and the windshield frame 7 is formed in a box shape having all the ceiling and surrounding wall surfaces. In this structure, the windshield frame 7 is almost the same in shape as the conventional free-standing windshield 24, but is fixed in a state of being fitted between the strong protective frame 1 and the floor panel 11 of the driver's cab. Since the upper end is supported by the protective frame, the strength may be small, and the structure can be simplified as compared with the conventional freestanding windshield.
In the third embodiment, the windshield frame 7 is attached to the protection frame 1 and integrated, and then mounted on the vehicle body.

[0017]

The construction machine having a driver's seat according to the present invention described above may be manufactured by providing the entire vehicle with a protective frame, and by installing a windshield frame as necessary, the vehicle can be closed. Since a driver's cab can be provided, the driver's cab can be easily manufactured and assembled, the delivery time can be shortened, and specification changes can be relatively easily handled. In addition, the user can attach and detach the windshield frame according to the situation at the site, and select between an open cab and a closed cab according to the situation at the site, ensuring a more comfortable working environment for the driver There is an effect that can be.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an exploded cab of a first embodiment.

FIG. 2 is a schematic perspective view showing an exploded cab of the second embodiment.

FIG. 3 is an exploded schematic perspective view showing a cab of a third embodiment.

FIG. 4 is a sectional view showing an attachment structure of a windshield frame;

FIG. 5 is a cross-sectional side view showing, on an enlarged scale, a vibration-proof rubber mounting portion.

FIG. 6 is a side view of an open cab.

FIG. 7 is a perspective view showing a first example of a protection frame.

FIG. 8 is a perspective view showing a second example of the protection frame.

FIG. 9 is a perspective view showing a third example of the protection frame.

FIG. 10 is a schematic perspective view showing a conventional closed cab.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Protective frame 4 Ceiling part 5 Peripheral part 6 Ceiling board 7 Windshield frame 11 Floor plate 12 Screw hole 16 Bolt

Claims (3)

(57) [Claims] A protective frame (1) having a ceiling (4) located above a driver's head is used for a vehicle body of a construction machine or a floor panel (1) of a cab.
1) fixed to the periphery of the ceiling (4)
(5) and fastening elements (12) in the area surrounding the driver's seat of the floorboard (11)
Is arranged, and closes the opening of the protective frame (1).
A box-shaped windshield frame (7) having a ceiling and all surrounding wall surfaces is fastened to the fastening element (12) via anti-vibration rubber (15) at its upper and lower sides, and It is installed between (11) and the ceiling (4) of the protective frame.
A closed cab is formed by (7) and the windshield frame (7)
An operator's cab of a construction machine, wherein the operator's cab is opened by removing the operator's cab. 2. A ceiling (4) located above the driver's head.
The protective frame (1) provided is the body of the construction machine or the floor panel of the cab
(11), the ceiling (4) is provided with a ceiling plate (6) that covers the driver's head, the periphery of the ceiling (4)
(5) and floor plate (11) around the driver's seat
2) is arranged, and the opening of the protective frame (1) is closed.
A windshield frame (7) formed in a flat U-shape
And at the lower side, the fastening element via anti-vibration rubber (15)
(12) Fastened to the driver's cab floor panel (11) and the protective frame ceiling
(4), between the protective frame (1) and the draft shield frame (7)
A closed driver's cab is formed by removing the draft shield frame (7).
Open cab is formed by removing
A cab for a construction machine , characterized by: 3. The windshield frame (7) is fastened from below to a ceiling (4) of the protection frame by being fixed to the ceiling of the protection frame.
The cab of the construction machine described.