JPH10147956A - Cab guard for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily perform cleaning and maintenance of a front glass in a cab by using a guard mounted on the front face of the cab. SOLUTION: A front guard 2 is provided on the front face of a front glass on a cab mainframe 1 to be freely tilted. On the lower face of the front guard 2, a stopper 4 is provided, which is put in contact with a frame 3 to horizontally hold the front guard 2, when tilted. In this way, the front guard 2 is held in a horizontal condition, so that cleaning and maintenance of the front glass on the cab mainframe 1 can be easily performed on the front guard 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard for protecting an operator's cab and an operator from rocks, debris, and the like that fly into an operator's cab of a construction machine such as a hydraulic shovel.

[0002]

2. Description of the Related Art A construction machine such as a hydraulic excavator is constructed of a wire mesh or the like in front of a front glass of an operator's cab in order to protect a driver's cab and, in turn, an operator in the operator's cab from rocks and the like flying from the front during work. The front guard is a necessity, especially for construction machines that perform a breaker operation.

Since such a front guard is provided in a driver's cab, it is necessary that the front window can be easily cleaned and maintained. For this reason, for example,
As shown in Japanese Patent No. 30252, a guard for tiltably supporting the guard below the cab is provided, and a spring for fixing the guard on the front of the cab is provided.
There is known an apparatus in which a guard is tilted so that a front window of a driver's cab can be easily cleaned and maintained.

[0004]

However, in the guard described in Japanese Utility Model Laid-Open No. 6-30252, although the guard can be tilted, it cannot be fixed in a state where the guard is tilted.
When cleaning or maintenance of the front window, the guard was in the way and it was difficult to perform the work. In addition, since the front window of the driver's cab is located at a relatively high position, reach out from the side of the driver's cab or install a scaffold such as a stepladder to clean and maintain the front window. Since the work had to be performed afterwards, the work efficiency was low.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a guard for a cab of a construction machine that can easily clean and maintain a front window of the cab.

[0006]

FIG. 1 shows an embodiment of the present invention.
3, the invention according to claim 1 is applied to a guard 2 provided in a cab 1 of a construction machine, and a support means 5 for tiltably supporting the guard 2 below the cab 1 is provided. , 7A and holding means 4 for holding the guard 2 in a substantially horizontal state. According to the first aspect of the present invention, the guard 2 is held by the holding means 4 in a substantially horizontal state with the guard 2 tilted forward.

In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments of the present invention are used to make the present invention easy to understand. However, the present invention is not limited to this.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a configuration of a guard according to an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is an overall front view, and FIG. 3 is a main part front view. FIG.
As shown in FIG. 3, the cab main body 1 is provided with two front glasses 1A and 1B, and a front guard 2 for protecting the cab main body 1 is provided in front of the lower front glass 1A. ing. The front guard 2 is tiltably supported by pins 5 on a lower guide 7 </ b> B protruding substantially forward from below the cab body 1. The upper part of the front guard 2
An upper guide 7 </ b> A projecting substantially forward from the cab main body 1 can be locked by a bolt 6. A stopper 4 is attached to the left and right lower surfaces of the front guard 2 to contact the frame 3 and maintain the horizontal state of the front guard 2 when the front guard 2 is in a substantially horizontal state. In addition,
A wiper 8 is attached to a front glass 1B provided above the front glass 1A.

Next, the operation of the present embodiment will be described. In the state shown in FIG. 3A in which the front guard 2 is tilted upward and its tip is fixed to the upper guide 7A with bolts 6, the front guard 2 is provided by the driver's cab body 1, from the rocks and debris flying from the front. It also serves to protect the operator.

On the other hand, when the bolt 6 is removed and the front guard 2 is pivoted about the pin 5 and tilted forward, the stopper 4 comes into contact with the frame 3 and the front guard 2 is substantially horizontal (FIG. 3). Rest in the state of b). In this state, since the front guard 2 functions as a scaffold, the user can work on the front guard 2 that is in a horizontal state when cleaning and maintaining the front window of the cab body 1. This eliminates the need to reach out from the side of the driver's cab body 1 and perform work using a scaffold such as a stepladder, so that cleaning and maintenance of the front glass 1A of the driver's cab body 1 can be efficiently performed. It can be carried out. Also,
As shown in FIG. 4, when the front guard 2 is mounted, the chain 1
0 does not get in the way.

In the above embodiment, the stopper 4 provided on the lower surface of the front guard 2 is brought into contact with the frame 3 to hold the front guard 2 in a horizontal state. As shown, a stopper 4A for abutting the lower upper surface of the front guard 2 on the frame 3 may be attached, and at the time of work, the lower upper surface of the front guard 2 may abut on the stopper 4A to hold the front guard 2 in a horizontal state. . As shown in FIG. 6, a stopper 4B is provided so as to abut on the upper surface of the lower guide 7B, and the lower surface of the front guard 2 is brought into contact with the stopper 4B during operation to hold the front guard 2 in a horizontal state. Is also good. The stoppers 4A and 4B may be provided only at the left and right end portions below the front surface of the cab main body 1, or may be provided so as to extend over the entire left and right region below the front surface.

Further, in the above embodiment, the front guard for protecting only the lower portion of the cab body 1 has been described. However, when the front guard is provided so as to cover the entire front surface of the cab body 1, The front guard may be divided into upper and lower parts, and the lower front guard may be held so as to be tiltable. At this time, it is preferable that the upper front guard is held so as to be openable and closable to the side like the conventional guard.

In the correspondence between the above embodiment and the claims, the lower guide 7B and the pin 5 constitute supporting means, and the stoppers 4, 4A and 4B constitute holding means.

[0014]

As described in detail above, the guard of the construction machine cab according to the present invention is tiltably supported by the support means and held substantially horizontally by the holding means. The scaffold can be used as a scaffold, which makes it possible to easily and efficiently perform maintenance such as cleaning of the glass provided on the front surface of the driver's cab and wipers and lights without preparing a scaffold such as a stepladder.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a guard of a construction machine cab according to an embodiment of the present invention.

FIG. 2 is an overall front view showing a configuration of a guard of a construction machine cab according to the embodiment of the present invention.

FIG. 3 is a front view of a main part showing a configuration of a guard of a construction machine cab according to the embodiment of the present invention.

FIG. 4 is a side view showing a comparative example.

FIG. 5 is a side view showing a configuration of a guard of a construction machine cab according to another embodiment of the present invention.

FIG. 6 is a side view showing a configuration of a guard of a construction machine cab according to still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cab body 1A, 1B Front glass 2 Front guard 3 Frame 4, 4A, 4B Stopper 5 Pin 6 Bolt 7A Upper guide 7B Lower guide 8 Wiper

Claims (1)

[Claims] 1. A guard provided in an operator's cab of a construction machine, comprising: support means for tiltably supporting the guard below the operator's cab; and holding means for holding the guard in a substantially horizontal state. A guard for a construction machine operator's cab.