JP2002316789A - Operator cab of construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machine allowing an operator to safely operate without undue stress during operation, moving, and running by allowing the operator to directly observe downward from the inside of a cabin in the machine having the cabin at a high position. SOLUTION: A window allowing the operator to observe downward therethrough is provided in a floor part at the front of an operator seat located inside the cabin. A control box having operation levers is disposed on the side of the operator seat or on the forward right and left sides of the seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab of a construction machine.

[0002]

2. Description of the Related Art A construction machine used for cargo handling in harbors and the like, which is based on a mobile crane or a hydraulic excavator, has a high post (FIG. 6 (a)),
High cab (FIG. 6B), elevated cab (FIG. 6
(C)), the position of a driver's cab (hereinafter referred to as a cab) is raised.

[0003] By raising the cab in this way,
During unloading or loading work from the ship a, the inside of the hold can be seen (FIG. 7).
(A)). Alternatively, in the case of an operation of stacking earth and sand, stone, scrap, or the like, a driver can directly see a place where a load is grabbed (FIG. 7B). Further, in the case of a loading operation on a truck having a high surrounding of the loading platform, the operation becomes easy.

However, as shown by hatching in FIG. 7B, there is a blind spot which cannot be seen when the driver is sitting in the driver's seat, as shown by hatching in FIG. 7B. Because of this blind spot, the near side when approaching the ship or the crawler during traveling cannot be seen. To look down at the foreground, you would either float up and look down (even if you do not see directly below), or look out through your doors and side windows. Since all of these take an unnatural driving posture, fatigue tends to occur, which causes an accident or a work error.

[0005] A conventional mobile crane is a floor lever control in which an operation lever is arranged at the foot of the driver's seat (in front of the floor) (Fig. 9). For this reason, the field of view below the cab is blocked by a lever attached to the floor, and cannot be seen when sitting in the driver's seat. It is necessary to take a position away from the driver's seat to look down, but it is not suitable for crane operation that requires delicate operation.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a machine in which a driver's cab is located at a high position so that a driver can directly look down in the driver's cab, and can be operated at a time of working and traveling. It is an object of the present invention to provide a machine that allows a user to operate safely without difficulty (FIG. 2).

[0007]

A window is provided on the floor in front of the driver's seat provided in the cab so that the window can be seen downward. In addition, a control box having an operation lever is arranged next to the driver's seat or at the front left and right positions of the driver's seat.

[0008]

FIG. 1 shows an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a driver's seat, and an operation lever 2 is disposed on a control box 3 provided on a side of the driver's seat. Reference numeral 4 denotes a window provided at the front of the floor 5 of the cab, which can be seen downward.

With this configuration, as shown in FIG. 3, when the driver sits on the seat 1, the driver can look through the window 4 from the lower side of the cab windshield 6 through the window 4. If the hand lifts a little from the driver's seat or turns his upper body forward (FIG. 4) and looks down through the window 4, the crawler front end 7 directly below the cab A can be seen.

With the above construction, it is preferable to attach a heating wire or the like to the window glass in order to prevent fogging of the see-through window. This window can naturally be applied not only to a crane but also to an excavator (FIG. 5).

[0011]

According to the present invention, a window which can be seen downward is provided at the front of the cab floor. As a result, safe work became possible without a signal indicator.

[0012] Not only at the time of work but also at the time of movement (at the time of traveling), the driver can travel while directly looking at the crawler, which greatly contributes to improvement of safety.

Further, since the driver can directly look down through the window 4 and does not have to take an unreasonable posture, the driver's fatigue can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cab provided with a window according to the present invention.

FIG. 2A is a cab having a control box for installing an operation lever on a front side of a seat, and FIG.
FIG.

FIG. 3 is a view for explaining a state in which a work position can be seen well according to the present invention.

FIG. 4 is a view for explaining that a tip end position of a crawler can be seen;

FIG. 5 is a view showing an example in which the present invention is applied to a cab of an excavator and explaining that an operator can see the hole bottom.

FIGS. 6A and 6B show three examples of raising the cab in a known construction machine to a high position, where FIG. 6A shows a high post system, FIG. 6B shows a high cab system, and FIG.

FIG. 7 is a view for explaining that a blind spot occurs in a lower front part in a conventional cab structure.
(B) shows the time of stacking work of scraps and the like, and (c) shows the time of stacking work on a truck.

FIG. 8 is a view for explaining that an invisible area occurs in a known cab structure.

FIG. 9 is a view showing a position of a floor lever in a known cab.

[Explanation of symbols]

A cab 1 seat 2 operation lever 3 control box 4 (visible)
Window 5 (in the cab) Floor 6 Cab windshield 7 Crawler front end

Claims (2)

[Claims] An operator's cab for a construction machine, wherein a window is provided on a floor portion in front of an operator's seat provided in a cab so as to be able to see through downward. 2. The cab of a construction machine according to claim 1, wherein a control box provided with an operation lever is arranged next to a driver's seat or at a left and right position in front of the driver's seat.