JP2002256593A - Elevating step structure in construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an operator to easily rise and fall in movement between the top face of a storage box and the top face of a fuel tank without increasing the cost and impairing the operator's visual field in a cab. SOLUTION: An elevating step 12 is fitted to the side of the adjacent side of the storage box 7 of the fuel tank 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of an elevator step structure provided for a worker to ascend and descend on the upper surface of a body of a construction machine such as a hydraulic shovel during maintenance or the like.

[0002]

2. Description of the Related Art Generally, in a construction machine such as a hydraulic shovel or the like, when performing inspection or repair of an engine or a pump, maintenance such as filter replacement, or refueling, a worker stands on the upper surface of the body and performs work. Some are configured to do so. In such a case, it is necessary to provide steps, stairs, and the like for the worker to ascend and descend on the upper surface of the fuselage.
As shown in the figure, the storage box (storage box) 7 arranged at the right front end of the fuselage rises from the upper surface 7a to the upper surface 8b of the fuel tank 8 arranged adjacent to the storage box 7. It has been known. In this case, on the upper surface 7a of the storage box 7 from the ground,
For example, the access can be made by the step 16 attached to the lower traveling body 2, the upper surface of the crawler 2a, the step 17 attached to the swing frame 5, and the like. In FIG. 6, reference numeral 6 denotes a cab provided in the left front half of the body, and the cab 6 and the storage box 7 are provided.
In between, the base end of the boom 4a is swingably supported.

[0003]

However, in the above-described apparatus, if the height difference from the upper surface 7a of the storage box to the upper surface 8b of the fuel tank is large, it is difficult to ascend and descend. Therefore, conventionally, a storage box 7 having a stepped upper surface as shown in FIG. 7 has been provided.
In this case, the shape of the storage box 7 becomes complicated, which causes a cost increase. Also in this one,
If the front-rear length A of the storage box 7 is short, if the height H of one step of the stairs is set to, for example, 250 mm or less, which is defined as the height of the stair of the access system of the earthmoving machine by the International Organization for Standardization (ISO), The step size (toe clearance) L is defined by the ISO 2
In some cases, the stairs are difficult to ascend and descend. Further, the storage box disposed at the right front end of the fuselage is located on the opposite side of the cab disposed at the left front half of the fuselage with the boom support portion interposed therebetween. In the storage box, there is a concern that the operator's view in the right direction of the machine in the cab may be impaired, and there is a problem to be solved by the present invention.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been created for the purpose of solving these problems, and has an upper surface of a storage box accessible from the ground side. And a step for ascending and descending between a tall fuel tank and an upper surface of a tall fuel tank disposed adjacent to the storage box are attached to a side surface of the fuel tank adjacent to the storage box. This makes it easy to move up and down between the upper surface of the storage box and the upper surface of the fuel tank, and it is possible to avoid an increase in cost and a loss of visibility of the operator. In this case, by attaching the step via a reinforcing plate fixed to the side surface of the fuel tank, there is an advantage that stress acting on the side surface of the fuel tank can be reduced and the strength of the fuel tank can be increased.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a hydraulic excavator. The hydraulic excavator 1 is a crawler-type lower traveling body 2, an upper revolving body 3 rotatably supported by the lower traveling body 2, and attached to the upper revolving body 3. It is composed of various parts such as a front attachment 4.

A swing frame 5 serving as a mount for the upper swing body 3 has a boom 4a constituting a front attachment 4 supported at the center front thereof so as to be able to swing up and down, and a left side of the boom support 5a. Is equipped with cab 6,
On the right side of the boom support portion 5a, a storage box 7, a fuel tank 8, and a hydraulic oil tank 9, which will be described later, are arranged from the front side.
It is arranged in the order. Further, an engine room 10 in which member devices (not shown) such as an engine, a pump unit, a battery, and a radiator are housed is disposed in a rear half portion of the swing frame 5. By the upper surface of the tank 9 and the fuel tank 8,
A substantially horizontal body upper surface 11 is formed. Then, the worker can perform operations such as maintenance and inspection such as repair and repair of the member devices, filter replacement, and refueling while being placed on the upper surface 11 of the machine body.

[0007] The storage box 7 is for storing a pail, a tool, a cold protection tool and the like therein, and the bottom of the storage box 7 is formed by a swing frame 5. Further, the upper surface 7a of the storage box 7 is formed in a substantially horizontal shape and can be opened and closed, but the height of the upper surface 7a is
The height is set to a low level so that the operator's rightward view of the cab 6 in the cab 6 is not impaired.

On the other hand, the worker moves up and down on the front part (surface part adjacent to the storage box 7) 8a of the fuel tank 8 from the upper surface 7a of the storage box 7 to the upper part 8b of the fuel tank 8. Step 1 for lifting
2 are installed. In this case, a reinforcing plate 13 is welded to the step mounting portion of the fuel tank 8, and the elevating step 12 is detachably mounted on the reinforcing plate 13 via a screw 14. In this embodiment, the height H1 from the storage box upper surface 7a to the elevation step 12 and the height dimension H2 from the elevation step 12 to the fuel tank upper surface 8b.
Is set in the range of 230 mm to 400 mm so as to conform to the height of the step of the access system of the earthmoving machine specified by the International Organization for Standardization (ISO). Further, a step (toe clearance) dimension L1 of the elevating step 12 is set to 130 mm or more so as to conform to the step dimension of the step specified in the ISO. Further, in the present embodiment, the stepping distance L2 on the storage box upper surface 7a is sufficiently ensured, but since the toe can be put in the space below the lifting / lowering step 12, the substantial stepping distance L3 is set as described above. Even when the front and rear length A of the storage box 7 is shorter than the stepping distance L2, the stepping distance required for elevating the storage box upper surface 7a can be secured. It has become.
Reference numeral 15 denotes a decorative cover attached to the front surface 8a of the fuel tank 8, and the elevating step 12 projects forward from an opening 15a formed in the decorative cover 15.

Reference numeral 16 denotes a step for attaching to the frame of the lower traveling body 2, and 17 denotes a step for attaching to the front end of the swing frame 5. The worker climbs these steps 16, 17 and the upper surface of the crawler 2a. Thus, the upper surface 7a of the storage box 7 can be accessed from the ground. Further, reference numeral 18 denotes a handrail for the operator to grip when going up and down on the upper surface 11 of the machine body.

In the apparatus configured as described above, maintenance such as inspection and repair of member devices, filter replacement,
When ascending and descending to the upper surface 11 of the machine body for performing operations such as refueling, it is possible to ascend and descend between the upper surface 7a of the storage box and the upper surface 8b of the fuel tank using the elevating step 12 attached to the front surface 8a of the fuel tank 8. However, in this case, for example, it is difficult to conform to the dimensions stipulated as the access system of the earthmoving machine in the ISO on the stairs. The access system can be provided easily. In addition, the shape of the storage box is complicated as in the case where the upper surface of the storage box is stepped, which contributes to an increase in cost.
It does not obstruct the operator's view of the inside of the aircraft rightward. And in this thing, the step 12 for raising and lowering
The fuel tank 8 is mounted on a front surface 8a of the fuel tank 8 via a reinforcing plate 13 so that a step 12
When the load of the worker is applied to the front of the fuel tank 8a
Can be reduced, but there is an additional advantage that the strength of the fuel tank front surface portion 8a can be increased by the reinforcing plate 13 and the elevating step 12.
Further, since the elevating step 12 is detachably attached to the reinforcing plate 13, the elevating step 12 is removed when, for example, the swing support shaft of the boom 4a is attached to and detached from the boom support 5a. Removing it makes it easier to work and is convenient. In the present embodiment, only one elevating step 12 is attached to the front surface 8a of the fuel tank 8, but the storage box upper surface 7a
If the height difference between the fuel tank and the upper surface 8b of the fuel tank is large, it is a matter of course that a plurality of elevating steps 12 may be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic shovel illustrating an embodiment.

FIG. 2 is a side view of an elevating step mounting portion.

FIG. 3 is a plan view of an elevating step attaching portion.

FIG. 4 is a front view of an elevating step attaching portion.

FIG. 5 is a perspective view of an elevating step attaching portion in which a decorative cover is omitted.

FIG. 6 is a side view of a hydraulic shovel showing a conventional example.

FIG. 7 is a side view of a storage box showing a conventional example.

[Explanation of symbols]

 Reference Signs List 7 storage box 7a upper surface 8 fuel tank 8a front portion 8b upper surface 12 elevating step 13 reinforcing plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Yoshida 7-14-14 Wadamiya-dori, Hyogo-ku, Kobe City, Hyogo Prefecture Inside Nishiryo Engineering Co., Ltd. (72) Inventor Tomoya Terakawa 1-5-5, Takatsukadai, Nishi-ku, Kobe City, Hyogo Prefecture -8 Hanshin Kiki Co., Ltd. F term (reference) 2D015 EB02 3D022 AA02 AC10 AD10 AE01

Claims (2)

[Claims] 1. A step for raising and lowering between an upper surface of a storage box accessible from the ground side and an upper surface of a tall fuel tank disposed adjacent to the storage box, comprising the steps of: A step structure for raising and lowering a construction machine, wherein the step structure is attached to a side surface adjacent to a storage box. 2. A stepping structure for a construction machine according to claim 1, wherein the step is mounted via a reinforcing plate fixed to a side surface of the fuel tank.