JP2006036129A - Step device of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a step device of a construction machine capable of allowing a worker to safely get on/get off a top side of the construction machine for a long time, and reducing the maintenance work. <P>SOLUTION: The step device 30 for allowing a worker to get on/get off a construction machine comprises a U-shaped step 25 fixed to a front end face of a lower frame 24, a tool box 23 and a lid 23a provided on a top side thereof, a stepped part 28 consisting of a horizontal face 28a and a vertical face 28b rising vertically from the horizontal face 28a, and a house cover 22 to cover a tank 20 or the like. A stainless steel plate 31a is installed on the surface of the house cover 22, a stainless steel plate 31b is installed on the horizontal face 28a of the stepped part 28, and a stainless steel plate 31c is installed on the lid 23a. In addition, a projection part 32 consisting of a large number of projections and recesses is provided on the stainless steel plate 31a, the stainless steel plate 31b and the stainless steel plate 31c. The step device 30 can prevent slip and corrosion thereby. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a step device for a construction machine, and more particularly to a step device for a construction machine for facilitating getting on and off the upper surface of the construction machine.

  2. Description of the Related Art Conventionally, as a step device for a construction machine, there is known a structure in which an anti-slip protrusion is formed by performing burring processing or the like on the entire area of an iron plate serving as a scaffold. That is, in this step device, projections made up of a large number of projections or depressions are formed on the surface of a step member made of iron plate, and each projection is provided with a through hole. Therefore, water and mud are not collected on the surface of the step device, and an effect of preventing slipping can be exhibited by the shape of the protrusion (see, for example, Patent Document 1).

There is also known a boarding / exiting step in which a non-slip plate is laid so as not to slip a foot when getting on and off the driver's seat. The boarding / alighting step is provided with a non-slip plate that is bent into a protruding shape along the edge of the steel plate. Therefore, it is difficult for mud to accumulate around the boarding / alighting step, and even if mud accumulates, it can be easily removed, so that the anti-slip effect can be sufficiently exhibited (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 11-093215 JP 2004-124511 A

  However, in the invention disclosed in the above-mentioned Patent Document 1, since the burring process or the like is performed on the iron plate that is the step device and the whole is painted, the coating is peeled off from the edge portion during getting on and off the step device. There is a risk of rusting. When such rust occurs, the step device may corrode depending on the degree of rust, and the step device may break when an operator gets on or off the step device. Therefore, it is necessary to frequently perform maintenance work of the construction machine such as monitoring the progress of rust and replacing the step device. Also, in the invention disclosed in the above-mentioned Patent Document 2, when rust is generated at the bent portion of the edge portion of the anti-slip plate of the steel plate, the protruding portion of the bent portion is broken, and the anti-slip property is exhibited. Can not.

  Therefore, in the step device provided in the construction machine, it is possible to safely get on and off the upper surface of the construction machine over a long period of time, and a technical problem arises in order to reduce maintenance work. The purpose is to solve the problem.

  The present invention has been proposed in order to achieve the above-mentioned object, and the invention according to claim 1 is a step device which becomes a scaffold when getting on and off a construction machine, and the portion to be the scaffold is formed of a stainless plate. The present invention provides a step device for a construction machine.

  According to this structure, the stainless steel plate is installed on the surface of the step device as a scaffold for the construction machine so that rust does not occur.

  The invention described in claim 2 provides a step device for a construction machine, wherein the surface of the stainless steel plate is formed with a plurality of protrusions or protrusions comprising recesses.

  According to this structure, the protrusion part which consists of many convex parts or recessed parts is formed in the surface of a stainless steel plate by burring etc., and it prevents slip, and also prevents the generation | occurrence | production of rust in a step apparatus.

  According to the first aspect of the present invention, since the step device serving as a scaffold for getting on and off is covered with the stainless steel plate, there is no possibility that the step device corrodes due to rust generated in the portion serving as the scaffold. Therefore, it is possible to safely get on and off the construction machine and to reduce the maintenance work of the step device.

  According to the second aspect of the present invention, since the protrusions comprising a large number of convex portions or concave portions are formed on the surface of the stainless steel plate, in addition to the effects of the first aspect, the slip prevention of the scaffolding In addition, since there is no possibility that the protrusion is lost due to the progress of corrosion, a stable scaffold can be maintained over a long period of time.

  Hereinafter, a step device for a construction machine according to the present invention will be described with reference to preferred embodiments. In the step device provided in the construction machine, the present invention provides a stainless plate on a part of the upper surface of the construction machine for the purpose of safely getting on and off the upper surface of the construction machine and reducing maintenance work for a long time. Realized by that.

  Hereinafter, an embodiment of a step device for a construction machine according to the present invention is applied to a hydraulic excavator and will be described in detail with reference to FIGS. FIG. 1 is a side view of a hydraulic excavator as an example of a construction machine applied to the present invention. In the excavator 10, an upper swing body 13 is rotatably mounted on a lower traveling body 11 via a swing mechanism 12. The upper swing body 13 is provided with a cap 14 on one front side thereof, and a boom 15 is attached to the front center portion so as to be able to be raised and lowered. Further, an arm 16 is attached to the tip of the boom 15 so as to be rotatable up and down, and a bucket 17 is attached to the tip of the arm 16.

  Further, a tank 20 is provided on the other front side of the upper swing body 13, and this tank 20 is covered with a house cover 22 such as a steel plate together with an engine 21 and the like. Further, a tool box 23 is fixed to the front portion of the tank 20, that is, the uppermost surface of the upper revolving body 13, and a U-shaped step 25 projects from the front end surface of the lower frame 24 of the upper revolving body 13. Has been. A cover 26 such as a steel plate is installed on the front surface of the house cover 22 covering the tank 20 and on the upper surface of the rear portion of the tool box 23. Further, a handrail 27 is disposed on the right side of the upper swing body 13 from the vicinity of the upper portion of the tank 20 to the front lower portion of the tool box 23.

  FIG. 2 is a diagram illustrating an example of the step device 30 provided in the hydraulic excavator illustrated in FIG. 1. The cover 26 includes a stepped portion 28 including a horizontal plane 28a and a vertical plane 28b that rises perpendicularly from the horizontal plane 28a. The step device 30 covers the step 25 fixed to the front end portion of the lower frame 24, the tool box 23 and the lid 23a provided on the upper surface thereof, the stepped portion 28, the tank 20, and the like. The house cover 22 is used.

  Further, a stainless plate 31a is installed on the upper surface of the house cover 22, a stainless plate 31b is installed on the upper surface of the horizontal surface 28a of the stepped portion 28, and a stainless plate 31c is installed on the upper surface of the lid 23a. Has been. In the following description, the stainless plate 31a, the stainless plate 31b, and the stainless plate 31c are collectively referred to as the stainless plate 31. Further, on the surface of the stainless steel plate 31, there are formed a plurality of protrusions 32 made up of a number of protrusions or recesses.

  Further, the handrail 27 that becomes a handrail when getting on and off the step device 30 is fixed to the cover 26 that forms the upper end portion of the vertical surface 28b of the stepped portion 28, and a rising portion 27a that is vertically formed, It consists of a curved portion 27b that is curved in a convex shape from the upper end of the rising portion 27a diagonally forward and downward, and the lower end portion of the curved portion 27b is bent to the lower surface side of the lower frame 24 and fixed by the clamp 33. .

  Next, the operation when getting on and off the step device 30 will be described with reference to FIGS. In order for the operator to get on and off the hydraulic excavator 10 using the step device 30, first, the operator climbs to the lower traveling body 11, and then puts his / her feet on the step 25 projecting from the front end surface of the lower frame 24, Ascending above the lid 23 a of the tool box 23 installed on the upper swing body 13. Furthermore, it rises to the upper surface of the house cover 22 that covers the tank 20 using the horizontal surface 28a of the stepped portion 28 as a scaffold.

  At this time, if the worker ascends with his / her hand holding the bending portion 27b of the handrail 27, the worker can ascend from the step 25 to the lid 23a of the tool box 23 in a stable posture. In addition, when ascending to the upper surface of the house cover 22 covering the tank 20 with the horizontal surface 28a of the stepped portion 28 as a scaffold, the operator can be stabilized by ascending while holding the hand rail 27 on the rising portion 27a. In this state, it can rise to the upper surface of the house cover 22.

  Further, since the stainless plate 31c installed on the lid 23a of the tool box 23 is provided with projections 32 made up of a large number of convex portions or concave portions, when the operator ascends above the lid 23a There is no risk of slipping. Further, since the stainless plate 31b installed on the horizontal surface 28a of the stepped portion 28 is also provided with a large number of protrusions 32, there is no possibility that the operator slips when the worker rises above the horizontal surface 28a. . In addition, since the stainless plate 31a installed on the house cover 22 covering the tank 20 is also provided with a large number of projections 32, the operator can slide his / her foot even when the worker rises on the house cover 22. There is no.

  In addition, since these protrusions 32 are directly formed on the stainless steel plate 31, rust or the like does not occur and corrosion does not occur, so there is no possibility that the protrusions 32 break or fall off. Therefore, the step device 30 can be used as a scaffold that stably prevents slipping over a long period of time.

  Note that the step device 30 is not limited to the structure shown in FIG. 2, and the present invention is not limited to the structure of various stepped portions that are easy to get on and off. Needless to say, is applied. Furthermore, you may form the horizontal surface 28a itself of the lid | cover 23a and the step part 28 with a stainless steel plate.

  Furthermore, the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The side view of the hydraulic excavator as an example of the construction machine applied to this invention. The figure which shows an example of the step apparatus provided in the hydraulic shovel shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hydraulic excavator 11 Lower traveling body 13 Upper revolving body 20 Tank 22 House cover 23 Tool box 23a Lid 24 Lower frame 25 Step 26 Cover 28 Step part 28a Horizontal surface 28b Vertical surface 30 Step apparatus 31, 31a, 31b, 31c Stainless plate 32 protrusion

Claims (2)

In a step device that will serve as a scaffold when getting on and off construction machines,
A step device for a construction machine, wherein the scaffolding portion is formed of a stainless steel plate.   2. The step device for a construction machine according to claim 1, wherein the stainless plate has a plurality of protrusions or protrusions formed on the surface thereof.

Images