JP2000168452A - Step for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a step for construction machine easy to attach and detach and having a housing space for tools by mounting a step on the machine body of a construction machine in such a manner as to be attachable and detachable. SOLUTION: A housing box 18 comprises a housing box body 18a consisting of a rectangular container opened in the upper surface and having a length L and a lid body 24 openably and closably mounted on the opening part of the upper surface of the housing box body 18a. A connecting member comprises a hook to be mounted on the housing box 18 and a catch 20b to be mounted on a super structure frame 8, and a plurality of sets thereof is provided. The hook is formed by bending a steel plate having a prescribed width in L-shape, and a band steel is mounted on the catch 20b so that a plurality of bent hooks can be hooked in the lower part thereof. The hook is hooked on the catch 20b, whereby the both are connected, so that the housing box 18 can be attachably and detachably mounted on the super structure frame 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step provided on a construction machine such as a hydraulic shovel or a crane truck, and more particularly, to a step detachably provided on a body of a construction machine.

[0002]

2. Description of the Related Art A construction machine is provided with a step, which is a scaffold, on an airframe. The steps are as follows:
It is used when inspecting and maintaining the aircraft, or when moving on the aircraft. This step is integrally attached to the fuselage by means such as welding, rivets, bolts and the like.

[0003]

The steps of the conventional construction machine of the above-described embodiment have the following problems to be solved.

(1) Difficulty in detaching and attaching: Since the steps are integrally attached to the body by welding or the like, it is difficult to remove or replace them in the case of breakage or the like. In a relatively large construction machine, a so-called catwalk in which steps are formed in a corridor shape is provided on an outer portion of the body. The catwalk is attached by bolts so that it can be removed when the size of the body is limited, for example, when transporting a construction machine, but the attachment and detachment is troublesome.

[0005] (2) Deformation and breakage due to external force: The steps are usually provided by forming a steel plate and providing a non-slip projection on the tread or by forming a grid-like tread with a steel material.
Therefore, since it has a relatively simple structure, it is easily deformed and broken by contact with an obstacle or the like. Further, since the steps are integrally attached to the body, the body itself is also easily deformed.

(3) Unspecified storage space for tools and the like: As a storage space for tools and the like of construction machines, an unspecified, narrow and empty space such as an engine room is used. Therefore, installation in a specific, easy-to-use place is desired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem of the present invention is to provide a step of a construction machine which is easy to attach and detach, is hardly deformed by an external force, and has a storage space for tools and the like. That is.

[0008]

According to the present invention, a step of a construction machine for solving the above technical problem is characterized in that the step of the construction machine is detachably mounted on an airframe of the construction machine. Is provided.

The steps according to the present invention are removably mounted on the fuselage. Therefore, it can be easily attached and detached.

In a preferred embodiment, a storage box is formed in the step. Further, a lid that can be opened and closed is provided on the upper surface of the storage box, and a tread surface for the step is formed on the lid.

Therefore, since the steps are formed in a box shape, a storage space for tools and the like is secured, the strength is improved, and the steps are hardly deformed by an external force.

In a preferred embodiment, a connecting member is provided near the upper side of the step so that the step can be freely attached to and detached from the body, and a buffer member which comes into contact with the body is provided below the step. Have been.

[0013] Therefore, the steps are detachably connected by the connecting member, and the cushioning member is interposed between the steps and the body with which the steps come into contact. The generation of noise is also prevented, and the transmission of external force applied to the steps to the aircraft is damped.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The steps of a construction machine constructed in accordance with the present invention will be described in more detail with reference to the accompanying drawings, which illustrate a preferred embodiment of a hydraulic shovel as a typical construction machine. I do.

Referring to FIG.
The hydraulic excavator shown by the symbol
And an upper revolving body 6 mounted on the upper part so as to be freely rotatable. The upper slewing body 6 is provided with an operator cab 10, an engine room 12, a working device 14, and the like on an upper slewing body frame 8. The step 16 of the present invention is detachably attached to the upper revolving frame 8 constituting the body of the excavator 2.

Step 16 will be described with reference to FIGS. 2 to 5. Step 16 comprises a rectangular parallelepiped container-shaped storage box 18 having a length L in the front-rear direction (the left-right direction in FIG. 1) of the excavator 2. Storage box 18 and upper revolving frame 8
A connecting member 20 provided at an upper portion between the upper and lower revolving frames 8 to freely attach and detach the storage box 18 to and from the upper revolving unit frame 8;
And a buffer member 22 provided on the lower side.

The storage box 18 has a storage box body 18a of a rectangular container having a length L with an open upper surface, and a lid 24 attached to the opening of the upper surface of the storage box body 18a so as to be openable and closable. The lid 24 is connected to the storage box main body 1 by the hinge 18b.
A catch clip 18c, which is a well-known metal fitting for holding the lid 24 closed, is attached to the upper revolving structure frame 8 side of the upper revolving body frame 8a and the hinge 18b. A non-slip plate 26, which forms the tread surface of the step 16 on its upper surface, is large enough to cover the entire surface and is attached to the lid 24 by welding, screws, or the like. As shown in FIG. 5, the anti-slip plate 26 has a large number of anti-slip projections 26a protruding upward and arranged regularly.
The main body 18a, the lid 24, and the non-slip plate 26 are formed of a steel plate.

The connecting member 20 includes a plurality of sets of hooks 20a attached to the storage box 18 and catches 20b attached to the upper revolving unit frame 8. In the present embodiment, four sets are provided. The hook 20a is formed by bending a steel plate having a predetermined width into an L-shape. The tip of one side of the L-shape is brought into contact with the storage box body 18a, and the other side is spaced from the storage box body 18a. It is positioned so as to hang down and is attached by welding. The catch 20b is formed by bending both ends of the steel strip so that the hanging portions of the hooks 20a can be inserted so that the plurality of hooks 20a bent downward can be hooked. It is attached to the revolving frame 8 by welding. A plurality of steel plate pieces 20c are attached to the catch 20b by welding to the upper revolving body frame 8 in the longitudinal direction. This steel plate piece 20c is a catch 2
0b and the catch 20b of the storage box 18
Is regulated along the longitudinal direction. Thus, by hooking the hook 20a on the catch 20b, the two are connected, and the storage box 18 is attached to the upper revolving unit frame 8 so as to be detachable.

The cushioning member 22 is formed into a prismatic shape using hard rubber, urethane rubber, or the like, and a plurality of cushioning members 22 are attached to the storage box 18a by means such as adhesion or bolts. In the present embodiment, four are attached. The height H of the buffer member 22 (see FIG. 3) is such that when the storage box 18 is hooked on the upper revolving frame 8 by the connecting member 20, the non-slip plate 26 on the upper surface of the storage box 18 is in a horizontal state and the buffer member 2
2 is in contact with the upper revolving unit frame 8. The number of the cushioning members 22 is determined by the weight on step 16,
It is determined based on the weight of the step 16 itself and the like. The shape of the buffer member 22 may be a columnar shape instead of a prismatic shape, or may be a shape in which a plurality of buffer members 22 are integrated into one.

The operation of step 16 of the construction machine as described above will be described with reference to FIG.

(1) Easy attachment / detachment: When the step 16 is mounted on the body, the hook 20a of the connecting member 20 in the step 16 may be fitted so as to be hooked on the catch 20b. When the step 16 is to be removed from the body, the hook 20a may be removed from the catch 20b. Therefore, the step 16 can be freely detached and attached and detached easily. It can be easily removed when the size of the body is limited during transportation.

(2) It is hardly deformed by external force: Since the step 16 is formed in a box shape, it is hardly deformed by external force. Further, since the cushioning member 22 is interposed between the body (the upper revolving structure frame 8) and the external force applied to the step 16, it is difficult to deform the body. Further, generation of noise due to the vibration in step 16 is prevented by the buffer member 22.

(3) Providing a storage space for tools and the like: Since the step 16 has the storage box 18, a fixed storage space for tools and the like is secured. If the stored tools are expected to be stolen or mischief, a padlock may be attached between the machine body 8 and the storage box 18, between the storage box 18 and the lid 24, or the like.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified or modified within the scope of the present invention. It is.

(1) Connecting member: In the embodiment of the present invention, the buffer member 22 is provided between the step 16 and the machine body 8. However, when the buffer member 22 is not required, the step 16 is performed again. When more firmly attaching to the body 8 or the like, the same member as the connecting member 20 (the hook 20a and the catch 20b) may be further attached instead of the cushioning member 22, as shown in FIG.

(2) Step size and mounting position: In the embodiment of the present invention, step 1 having a size and length L is used.
The step 16 is provided, but the size of the step 16 can be determined as appropriate at the position where the step 16 is attached and as needed. In the embodiment of the present invention,
The step 16 is mounted on the right side of the body 8 of the excavator 2, but may be mounted on the front of the body (upper revolving frame) 8 as in step 26 shown in FIG. Also, as shown in step 36 in FIG. 8, the hydraulic shovel 2 can be provided on the left side surface of the cab 10 side with a length LL.

[0027]

According to the steps of the construction machine constructed in accordance with the present invention, there are provided steps of the construction machine which can be easily attached and detached, are hardly deformed by external force, and have a storage space for tools and the like.

[Brief description of the drawings]

FIG. 1 is a side view of a typical construction machine, a hydraulic excavator, including steps configured according to the present invention.

FIG. 2 is a perspective view showing a part of the step in FIG. 1 in a state where the step is detached from the body.

FIG. 3 is a view as seen in the direction of arrows AA in FIG. 2;

FIG. 4 is a view as seen in the direction of arrows BB in FIG. 3;

FIG. 5 is a partially enlarged view of a non-slip projection of a non-slip plate viewed in a direction indicated by an arrow C in FIG. 3;

FIG. 6 shows another arrangement example of the connecting member between the step and the body.
The figure shown in the state seen in the AA arrow direction of FIG.

FIG. 7 is a perspective view showing an example in which steps are attached to the front side of the body.

FIG. 8 is a side view of a hydraulic excavator showing an example in which a step is mounted on the cab side of the aircraft.

[Explanation of symbols]

 2: Hydraulic excavator (construction machine) 8: Upper revolving body frame (part of body) 16, 26, 36: Step 18: Storage box 20: Connecting member 22: Buffer member 24: Lid 26: Non-slip plate (Tread surface) )

Claims (4)

[Claims] 1. A step of a construction machine which is detachably attached to a body of the construction machine. 2. The step of a construction machine according to claim 1, wherein a storage box is formed in said step. 3. The step of a construction machine according to claim 2, wherein an openable / closable lid is provided on an upper surface of the storage box, and the tread of the step is formed on the lid. 4. A connecting member which is attached to the upper part of the step so as to be able to attach and detach the step to and from the body, and a buffer member which comes into contact with the body is provided below the step. Item 4. The step of a construction machine according to any one of Items 1 to 3.