JPH09105149A - Construction machine cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine cab which is easy to get on and off. SOLUTION: A boarding entrance 16, which allows an operator to get on and off, is provided on one side of a cab main body 15. A lift type door 17 is slidably provided from the boarding entrance 16 downward. This lift type door 17 moves vertically by means of guide machines 18, which are vertically provided so that they may face each other at the boarding entrance 16 and on both sides of the door 17. A plurality of steps 32, which are a rest for the foot to which the operator sets his or her foot are mounted on a face plate which is the outside surface of the lift type door 17 and is provided with no window while a vertical handrail located on both sides of the steps 32 are mounted on the face plate. When the lift type door 17 is lowered and opens the boarding entrance 16 of the cab main body 15, the steps 32 and the handrail 33, which are mounted on the outside surface of this lift type door 17, are spontaneously lowered so that they may be located between the ground surface and a floor surface 34 in the cab main body 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a cab for a construction machine in a hydraulic excavator, a bulldozer, a loader or the like.

[0002]

2. Description of the Related Art As shown in FIG. 2, in a conventional cab 1 such as a hydraulic excavator, a door 5 is rotated in a front-rear direction by a plurality of hinges 4 mounted vertically on an entrance / exit 3 of a cab body 2. It is a structure that opens and closes so that it can be opened.

When the operator gets on and off between the ground and the floor inside the cab body, the step 7 attached to the track frame 6 and, optionally, the crawler 8 are carried out.
You get on and off with your feet on the top of. Reference numeral 9 indicates a boom of the front working machine.

[0004]

In this case, step 7
Since the floor surface inside the cab body 2 is too far away, there is a problem that even if the operator puts his / her foot on the upper surface of the crawler 8, it is difficult for the operator to get on / off the vehicle. This problem becomes more pronounced as the construction machinery becomes larger.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cab for a construction machine which is easy to get on and off.

[0006]

According to a first aspect of the present invention, in a cab for a construction machine which surrounds a cockpit of an operator to form a living room space, the cab has an entrance / exit portion for the operator to get on and off. A main body, an elevating door provided slidably downward from the entrance / exit portion of the cab body, and a plurality of foot rests attached to an outer surface of the elevating door for an operator to rest his / her feet on. It is a cab for a construction machine having a configuration including.

When the raising / lowering door is lowered to open the entrance / exit portion of the cab body, a plurality of footrests attached to the outer side surface of the raising / lowering door are also lowered at the same time, so that the ground and the cab body are connected. Since a plurality of foot rests are located between the operator and the floor surface inside, the operator steps on and off while resting his feet on these foot rests.

According to a second aspect of the present invention, in the cab for a construction machine according to the first aspect, a vertical handrail is attached to the outer surface of the elevator door.

Then, the operator gets on and off while grasping the handrail while resting his or her feet on a plurality of foot rests located between the ground and the floor in the cab body.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

FIG. 1 shows a part of a hydraulic excavator as a construction machine, in which an upper revolving structure 13 is provided for a lower traveling structure 12 having a crawler 11 mounted thereon. A cab that surrounds and forms a living space 1
4. A front working machine (not shown) is provided.

The cab 14 is provided with an entrance / exit portion 16 on one side of the cab body 15 for an operator to get in and out, and an elevating type door 17 is slidable downward from the entrance / exit portion 16 of the cab body 15. It is the configuration provided.

The elevating type door 17 is vertically moved by vertical guide mechanisms 18 provided so as to face each other at the entrance / exit portion 16 of the cab body 15 and the left and right side portions of the door 17.

That is, the guide mechanism 18 is provided in the entrance / exit portion 16
Vertical guide rails 21 and 22 are provided on both left and right side portions of the door 17 and on both left and right side portions of the door 17, respectively, and fixed fulcrum shaft portions 23 are provided below the guide rail 21 on the cab body side and above the guide rail 22 on the door side, respectively. , 24 are provided, and the base ends of the links 25, 26 are rotatably supported by the fixed fulcrum shaft portions 23, 24, respectively, and the rollers 27, 28 are respectively attached to the tips of the links 25, 26. Each of these rollers is pivotally supported
27 and 28 are slidably fitted to the guide rails 22 and 21 of the opposite side, respectively.

When the door 17 is moved up and down, each roller is
27 and 28 move while rolling in the guide rails 22 and 21 of the other side. When the door is raised, the doors 17 are fitted into the entrance / exit portion 16 by the rotation of the links 25, 26 at the end of the ascending operation, and when the door is descended, the entrance / exit portion 16 is rotated by the rotation of the links 25, 26 at the start of descending. Try to pull out the door 17 from.

On the face plate portion outside the window 17 without the window 31, the step 32 as a plurality of foot rests for the operator to put his feet on, and the right and left sides of the step 32 are located. And a vertical handrail 33 is attached.

When the elevator door 17 is lowered to open the entrance / exit portion 16 of the cab body 15, the elevator door 17 is opened.
Steps 32 and handrails mounted on the outside of 17
Since 33 also descends at the same time and is located between the ground surface and the floor surface 34 in the cab body 15, the operator can easily get on and off while grasping the handrail 33 while stepping on a plurality of steps 32. it can.

According to the invention described in claim 1, the handrail 33 may not be provided on the outer surface of the elevating door 17. That is,
The handrail 33 may be provided on the side of the cab body 15 or may be caught in the step 32.

Furthermore, the foot rest is not limited to only step 32, but a plurality of steps 32 may be added to the handrail 33, for example.
A ladder (not shown) having an integrated shape may be provided as a footrest.

[0020]

According to the invention of claim 1, an elevator door is slidably provided downward from the entrance / exit portion of the cab body.
Since a plurality of foot rests are attached to the outer surface of the lift door, the foot rests attached to the outer surface of the lift door when the lift door is lowered to open the entrance / exit portion of the cab body. Since the parts can be located between the ground and the floor surface inside the cab body, the operator can easily get on and off the cab for the construction machine while putting his / her feet on these foot rests. In particular, it is possible to significantly reduce the difficulty in getting on and off as the construction machine becomes larger.

Further, since the elevating type door is slidably provided downward from the entrance / exit portion of the cab body, there is at least a space for opening and closing the door on the side surface of the construction machine as compared with the conventional opening / closing door by rotation. There is an advantage that the door can be fully opened even in a narrow place.

According to the second aspect of the present invention, it is possible to more easily get on and off the cab for the construction machine by utilizing the foot rest while being held by the handrail.

[Brief description of the drawings]

1A is a front view showing an embodiment of a cab for a construction machine according to the present invention, and FIG. 1B is a side view thereof.

FIG. 2 is a perspective view showing a conventional cab for a construction machine.

[Explanation of symbols]

 14 Cab 15 Cab body 16 Entrance / exit 17 Lifting door 32 Step as a foot 33 Railing

Claims (2)

[Claims] 1. A construction machine cab which surrounds an operator's cockpit to form a living room, and a cab body having an entry / exit portion for an operator to get in and out, and a downward sliding from the entry / exit portion of the cab body. A cab for a construction machine, comprising a vertically movable door that is movably provided and a plurality of foot rests that are attached to an outer surface of the vertically movable door and that allow an operator to rest his / her feet. 2. The cab for a construction machine according to claim 1, wherein a vertical handrail is attached to an outer surface of the lifting type door.