JPH0565720A - Step base for fixing and inspecting construction machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a stepping device capable of easily performing maintenance and inspection of equipment installed on a revolving structure such as a large hydraulic excavator. [Structure] A cover 8 having a leg portion 9 attached to one end face thereof is fixed to an opening 6a of a frame 6 of a revolving structure 2 by a bolt 10. The legs 8 are stored inside the revolving structure 2. When performing repairs, inspections, etc., the bolt 10 is removed, the cover 8 is separated from the opening 6a, and this is inverted and the leg 9 is placed upright on the ground as shown by the chain line to be used as a stepping device. use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepping device for maintenance and inspection of construction machines such as large hydraulic excavators.

[0002]

2. Description of the Related Art FIG. 3 shows a hydraulic excavator with a working machine mounted thereon. A revolving structure 2 is rotatably mounted on an upper part of a traveling structure 1 via slewing wheels. Cab 3,
An engine 4, a hydraulic device and the like for operating the work machine are installed. The surroundings and the upper part of the engine 4, hydraulic equipment and the like are covered with a building cover 5 for protection and aesthetic purposes. In general, the central portion and the outer end portion of the revolving structure 2 have a structure shown in FIG.
As shown in FIG. 3, frames 6 and 7 for supporting the engine 4 and other devices and parts are provided, and the lower surface side of the frame is used at the time of assembly, daily maintenance, inspection, repair, etc. Openings 6a and 7a are provided. And the openings are rocks on the ground, dismantled objects at the dismantling site,
It is covered with a cover to prevent intrusion of forest trees and the like and to prevent noise of the engine 4 and the like from going outside. The cover is usually formed from a thin steel plate and is bolted to the opening edge. When performing assembly, daily maintenance, inspection, repair, etc., you can work from the ground side by removing the cover.

[0003]

Particularly, the portion of the lower part of the revolving structure 2 such as the lower part of the engine, etc., is significantly deteriorated in the working posture when it is on the building cover 5, so that it may be grounded. It is desirable to be able to stand and work. But,
In a large-sized machine, the height of the revolving structure 2 from the ground is high, and it is often difficult to work from the ground.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stepping device capable of easily performing maintenance and inspection from the ground side in a large-sized construction machine.

[0005]

In order to achieve the above object, the present invention relates to a construction machine in which a revolving structure is rotatably mounted on a traveling structure, and a revolving structure is provided in an opening on the lower surface side of the revolving structure. It is characterized in that a cover having legs to be housed inside is fixed by a fixing tool. Furthermore, the present invention is characterized in that the legs of the cover are foldable.

[0006]

When the machine is in operation, the legs are held inside the revolving structure and the cover is fixed to the opening on the lower surface side of the revolving structure through the fixing tool. If necessary, remove the fixture, turn the cover over, and place the legs on the ground.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to FIG. At the lower end edge of the opening 6a of the frame 6, a cover 8 having a leg 9 attached to one end surface by welding or the like is provided.
It is fixed by a bolt 10 in a state in which the inside of the revolving structure 2 is held. When repairing or inspecting, the bolt 10 is removed and the cover 8 is separated from the opening 6a.
This is inverted and the leg 9 is set upright on the ground as shown by the chain line and used as a stepping device. Therefore,
Work efficiency is improved. Since the cover portion is used as the step plate, the step device can be formed only by adding the leg portions 9, and the increase in weight can be minimized. It should be noted that the leg portion 9 may be provided with an arbitrary number of footrests, if necessary.

FIG. 2 shows another embodiment of the present invention in which the legs of the cover 8 are foldable, and the same members in FIG. 1 as those in FIG. 1 are designated by the same reference numerals. A bracket 11 is fixed to one end surface of the cover 8 by welding or the like, and one end portion of a leg portion 12 is swingably connected thereto by a pin 13. A stay 15 including a first stay member 15a and a second stay member 15b is connected by pins 16 and 17 to a bracket 14 fixed to a portion inside the bracket 11 of the cover 8 and an intermediate portion of the leg portion 12. There is. The opposite end portions of both stay members 15a and 15b are pin 1
8 are connected to each other.

During normal operation of the machine, the legs 12 and stays 15 are folded as shown by the solid line, and the revolving unit 2 is rotated.
The cover 8 inside the
Attach to a. As a result, it is possible to prevent the leg 12 from deeply entering the inside of the revolving structure 2, which is advantageous when the space between the devices inside the revolving structure 2 and the cover 8 is small. For repair and inspection, bolt 10
Is removed, the cover 8 is inverted, the legs 12 are raised, the stays 15 are aligned, and the legs 12 are erected on the ground and used as a stepping device. In this state, the stay 15 functions as a stopper that prevents the leg portion 12 from swinging more than necessary. The legs 12
May be folded according to another commonly used configuration.

[0010]

As described above, according to the present invention, the cover attached to the opening of the frame of the revolving structure is removed as needed, and the cover is installed on the ground to maintain or inspect equipment on the revolving structure. Can be performed easily and safely from the ground side. Also, since it is a table with a flat surface, it can be used as a workbench or table instead of a step.

[Brief description of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention,

FIG. 2 is a sectional front view showing another embodiment of the present invention,

FIG. 3 is a side view showing the hydraulic excavator with the work implement worn.

[Explanation of symbols]

 1 traveling body 2 revolving structure 4 engine 5 building cover 6 frame 6a opening 7 frame 8 cover 9 leg 10 bolt 11 bracket 12 leg 13 pin 14 bracket 15 stay 15a first stay member 15b second stay member 16 pin 17 Pin 18 pin

Claims (2)

[Claims] 1. A construction machine in which a revolving structure is rotatably mounted on a traveling structure, and a cover having an opening on the lower surface side of the revolving structure and a leg portion to be housed inside the revolving structure is provided with a fixture. A stepping device for maintenance and inspection of construction machines, characterized by being fixed via 2. The stepping device for maintenance and inspection of a construction machine according to claim 1, wherein the legs are foldable.