JPH0811633A - Side step of construction machine - Google Patents

Abstract

PURPOSE:To conduct housing so that step plates may not become hindrances at the time of passing a side walk and also to conduct easy getting on/off with the step plates as footholds when getting on/off the upper part of a machine room is necessary. CONSTITUTION:At the side part cover 10 of a machine room, openings 11 are formed at the upper and lower two places, and at each opening 11, a step plate 12 is provided. The side steps 12 are furnished to the side cover 10 by mans of hinges 14 so as to be able to be turned in an up and down direction, and by operating a lever 18, an approximately horizontal state is brought about, and an approximately perpendicular direction to an operation position where a foot can be put on, is brought about, and displacement between it and a housing position to cover an opening 11 can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side step mounted on a side cover of an upper swing body of a construction machine such as a hydraulic excavator.

[0002]

2. Description of the Related Art A hydraulic excavator is a typical construction machine. A conventional hydraulic excavator has a structure as shown in FIG. In the figure,
Reference numeral 1 denotes an upper revolving superstructure. A driver's cab 2 and a front working mechanism 3 are installed on the front side of the upper revolving superstructure 1, a machine room 4 is installed on the rear side, and a rearmost position is provided. The counterweight 5 is attached. Inside the machine room 4, devices such as an engine, a hydraulic pump, a hydraulic oil tank, and a directional control valve are mounted.

A side walk 6 as a passage is attached to the upper swing body 1 in order to perform maintenance such as inspection and repair of the machine room 4 and cleaning and other operations. Further, the machine room 4 is provided with a side step 8 on a side cover 7 at a portion where a hydraulic oil tank is mounted in order to get on and off the upper part thereof. Further, a handle 9 is provided at an upper position of the side cover 7. Here, the side steps 8 are generally provided in upper and lower two stages, but in the case of a large model, there is a configuration in which a larger number of stages are provided.

Further, as shown in FIG. 11, a side step 8'comprising a metal pipe and composed of handrails 8a 'and 8a' and a plurality of stepping portions 8b 'provided so as to be bridged therebetween. The one configured to use is also known.

[0005]

By the way, both the side step 8 shown in FIG. 10 and the side step 8'shown in FIG. 11 are provided so as to project from the side cover 7 to the side walk 6 side. Because it is
When the operator or the worker tries to move from the driver's cab 3 side to the rear side of the machine room 5, this side step 8,
There is a problem that 8'blocks traffic. In order not to obstruct the passage on the sidewalk 6, the width of the sidewalk 6 must be widened or the protruding length of the side steps 8 and 8'from the side cover 7 must be shortened. However, Sidewalk 6
If the width is increased, the width of the entire vehicle body is increased, which is not preferable from the viewpoint of vehicle width limitation during transportation. Further, if the side step is made smaller, there is a problem that it becomes difficult to get on and off by the side step.

The present invention has been made in view of the above points, and an object of the present invention is to make it easy to get on and off the upper part of a machine room without being an obstacle when passing a sidewalk. Especially.

[0007]

In order to achieve the above-mentioned object, the present invention forms a plurality of openings in a vertical direction in a side cover, each opening having an operating position in a substantially horizontal direction. It is characterized in that it comprises a step plate which is pivotable to be positioned between a storage position in a substantially vertical direction and an opening / closing means for displacing each of these step plates between an operating position and a storage position. It is a thing.

[0008]

The step plate is always held in the storage position. Then, when getting on and off the upper part of the machine room, the opening / closing means is operated to displace the step plate to the operating position in the horizontal state. As a result, an operator of the construction machine or a worker who performs maintenance or the like can get on and off the machine room by using the step board as a foothold. Forming an opening in the side cover is not preferable from the viewpoint of appearance, but in a normal state, the opening is covered with the step plate, and thus the step plate is the same as the side cover. If you adjust the color tones, the appearance will not be particularly difficult to see.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, FIGS. 1 to 5 show a first embodiment of the present invention, and FIG. 1 shows an external appearance of a hydraulic excavator as an example of a construction machine in a state in which its side steps are stored, FIG. 2 is a sectional view of the operating state of the side step, FIG. 3 is a sectional view of the accommodated state, and FIGS. 4 and 5 are configuration explanatory views of the lever stopper mechanism.

As is apparent from FIG. 1, the upper revolving structure 1 of the hydraulic excavator is provided with a driver's cab 2, a front working mechanism 3 and a machine room 4, and a counterweight 5 is provided at the rearmost part. , And that the sidewalk 6 is provided, there is no particular difference from the above-described conventional art.

In the figure, 10 indicates a side cover,
The side cover 10 includes a vertical portion 10a and a vertical portion 10a.
It is composed of a bent portion 10b at the upper end of a. Then, the vertical portion 10a has openings 11 and 1 at two upper and lower positions.
1 is formed, and a step plate 1 is provided in each of these openings 11.
2, 12 are provided. The step plate 12 is in an inside of the vertical portion 10a of the side cover 10, and is in an operating position in which the tread surface 13 is arranged horizontally with the tread surface 13 facing upward, and a vertical state where the tread surface 13 faces outward. It is designed to be displaced to the stored position. Therefore, the tip of the step plate 12 is connected to the side cover 10 via the hinge 14 so as to be vertically rotatable. A stopper arm 15 is fixedly provided on the inner surface side of the side cover 10. When the step plate 12 is displaced to the operating position, the surface opposite to the step surface 13 is attached to the stopper arm 15. Upon contact, the load of the step plate 12 is received by the stopper arm 15.

The step plate 12 is interlocked to be displaced between the operating position and the storage position.
The operation wires 16a, 16 are provided on the side of each step plate 12.
b is connected. The operation wire 16a connected to the lower step plate 12 is inserted into a ring-shaped guide 17a provided on the inner surface of the side cover 10, and the guide 17a
The upper part is guided along the inner surface of the side cover 10. A guide 17b is also provided above the upper step plate 12 so that the operation wire 16
a is also inserted through this guide 17b, and the operation wire 16b connected to this upper step plate 12 is inserted through this guide 17b. Then, at the position of the guide 17b, the operation wires 16a and 16b are unified into the operation wire 16.

The tip of the operation wire 16 is attached to the side cover 10.
From the vertical portion 10a to the inner surface of the bent portion 10b at the upper end, and is led out upward from the end of the bent portion 10b, and the tip end is connected to the lever 18. The lever 18 is pivotally connected by a shaft 19a attached to a support member 19 provided upright on the bent portion 10b, and the other end thereof serves as a grip portion 18a. Therefore, by gripping and rotating the grip portion 18a of the lever 18, the step plate 12 is interlocked and displaced between the operating position and the storage position. Here, since the load is supported by the stopper arm 15 in the operating position, the step plate 12 is stably held. However, in the storage position,
It is the operating wire 1 that directly receives the load of the step plate 12.
Therefore, the lever 18 is provided with a lock mechanism so as to hold the step plate 12 in the storage position.

For this purpose, as shown in FIGS. 4 and 5, the support member 19 is provided with a stopper piece 20, and the stopper piece 20 is projected from the side surface of the support member 19 by the action of the spring 21. Biased in the direction. The tip of the stopper piece 20 has a tapered surface 20a, and when the lever 18 is rotated in the direction indicated by the arrow R in the drawing, the lever 18 follows the surface of the tapered surface 20a of the stopper piece 20. The stopper piece 20 can be pulled toward the support member 19 side against the urging force of the spring 21, and when the lever 18 rotates beyond the position of the stopper piece 20, the stopper piece 20 is moved. The pressing force against 20 is released, and the force of the spring 21 causes the lever 18 to project to restrict rotation of the lever 18 in the direction opposite to the arrow R. As a result, the step plate 12 is fixed in a stable state at the storage position. The lock release lever 2 is attached to the shaft 19a of the support member 19.
2 is rotatably mounted, and this lock release lever 22 is interposed between the lever 18 and the support member 19. The lock release lever 22 has a flat surface portion 22.
a is provided, and when the lock release lever 22 is rotated in the direction of arrow R, the stopper piece 20 is moved to the support member 19
Lever 1 by this stopper piece 20
The lock of 8 can be released.

The present embodiment is constructed as described above, and the step plate 12 constituting the side step is
At the storage position, the opening 11 is closed by being held vertically along the vertical portion 10a of the side cover 10. Further, even when the step plate 12 is displaced to the operating state, the step plate 12 becomes horizontal inside the side cover 10.
Therefore, any member does not project to the outside of the side cover 10, and when passing over the sidewalk 6,
Since objects that are obstructive to this passage are held in a state where they do not project from the side cover 10, smooth passage is ensured,
It also improves safety.

When riding on or off the upper part of the machine room in the upper swing body, the lever 18 is operated to rotationally displace the step plate 12 to the operating position.
As a result, when getting on and off the upper part of the machine room, by putting the foot on the tread surface 13 of the step plate 12 in the opening 11 of the side cover 10, this getting on and off can be performed smoothly. .

Thus, the step plate 12 has the side cover 10
Since it is provided inside the step board, the step board 1 is provided on the side walk 6 side even when the side step is not used.
Since 2 does not project, it does not hinder the passage on the sidewalk 6, but since the side cover 10 is provided with the opening 11, if these are left as they are, Not only is it unfavorable in appearance, but there is a risk that dust may get into the machine room. The step plate 12 is displaced to the storage position in order to close the opening 11 so as to cover it.

Next, FIGS. 6 to 9 show a second embodiment of the present invention, in which 30 denotes a side cover, and the side cover 30 includes a vertical portion 30a and this vertical portion. 30a
Is substantially the same as that of the first embodiment described above in that the vertical portion 30a is formed with a bent portion 30b and the vertical portion 30a is formed with an opening 31. The step plate 32 facing the opening 31 closes the opening 31 in the storage position, but projects outward from the side cover 30 in the operating position.

The construction of the step plate 32 is shown in FIG. One side of the step plate 32 is a tread surface 33, and the opposite side is a cover constituting surface 34. The tread surface 33 has unevenness or the like formed on its surface to prevent slipping. Further, when the step plate 32 is held at the storage position, the cover constituting surface 34 is exposed to the outside, and the cover forming surface 34 is coated with the same paint as the side cover 30. In order to displace the step plate 32 between the operating position and the storage position, a shaft 35 is mounted on the step surface 33 side of the step plate 32, and both ends of the shaft 35 are attached to the side cover 30. It is rotatably supported on the inner surface. As a result, the step plate 32, as shown in FIG. 6, has a storage position in which its cover constituting surface 34 substantially coincides with the outer surface of the side cover 30, and, as shown in FIG. 7, the side cover. It is rotatably displaced with respect to an operating position that extends horizontally outside 30.

As a means for opening and closing the step plate 32 between the storage position and the operating position, a pair of lifting rods 36, 36 are provided inside the side cover 30 on both left and right sides of the step plate 32. Each of these elevating rods 36 can slide vertically along a slide guide 37. Lever 38 is pivotally attached to the lower end portion and the intermediate portion of the elevating rod 36, and the other end of each lever 38 is pivotally attached to the step plate 32. Further, a roller 39 is provided upright on the upper end portion of the elevating rod 36, and the roller 39 is inserted into a long hole 41 provided in a lever 40. A rotary shaft 42 is integrally connected to an end portion of the lever 40, which is a pair of left and right, and the shaft 42 is rotatable with respect to a bearing portion 43 provided on the bent portion 30b of the side cover 30. Is supported by. A square portion 42a is formed on the rotary shaft 42, and an operating rod 44 is inserted through the square portion 42a. The pair of left and right operation rods 44 penetrates the bent portion 30b of the side cover 30 and extends upward, and a connecting rod 45 is provided at the tip thereof.

Further, as shown in FIG. 9, a pair of operating rods 44 extend to the outside through a guide hole 46 formed in the bent portion 30b of the side cover 30, and these operating rods 44 extend outside. The rod 44 can be rotated back and forth about the rotation shaft 42, and can be slid along the rectangular portion 42a of the rotation shaft 42 and the connecting rod 45 in the direction of approaching and separating from each other. Therefore, the guide hole 46 has a guide hole portion 46a extending in the direction of rotation of the operating rod 44, and the guide hole portion 46a.
At both ends of a, stopper holes 46b and 46c extending in a direction orthogonal to the guide hole 46a are formed.

With the above structure, when the side step is not used, the step plate 32 is held at the storage position as shown in FIG. As a result, it does not project to the sidewalk side, so it does not interfere with traffic on this sidewalk. In addition, the cover constituting surface 34 of the step plate 32 is attached to the side cover 3
0 of the opening 31 is almost completely covered, and the cover forming surface 34 forms a surface substantially continuous with the vertical portion 30a of the side cover 30. Therefore, not only is it preferable in terms of appearance, but it is possible to reliably prevent intrusion of dust and the like from the outside. Then, in order to hold the step plate 32 in this storage position, the operating rod 44 is slidably displaced in the direction in which the operating rod 44 approaches each other along the square portion 42a of the rotating shaft 42 and the connecting rod 45, and the operating rod 44 is moved. The guide hole portion 4 in the guide hole 46
By shifting from 6a to the stopper hole 46b, even if the weight of the step plate 32 acts in the direction in which the step plate 32 falls, the step plate 32 is reliably held at the storage position.

Next, in order to get in and out of the machine room, the step plate 32 constituting the side step is displaced to the operating position. For this purpose, first, the operating rod 44 is slid to make a stopper hole of the guide hole 46. From the portion 46b to the guide hole portion 4
6a. In this state, the connecting rod 45 is operated by grasping it by hand and tilting it toward the front side. by this,
The operating rod 44 rotates, and this rotation causes the lever 40 to rotate. Since the roller 39 provided on the elevating rod 36 is engaged with the lever 40, the elevating rod 36 moves up. A lever 38 is pivotally attached to the lifting rod 36, and the other end of the lever 38 is attached to the step plate 32.
Since it is pivotally attached to the step plate 32, the step plate 32 rotates about the shaft 35. When the operating rod 44 is displaced from the guide hole portion 46a of the guide hole 46 to the transition portion to the stopper hole portion 46c, the tread 33 is projected horizontally from the side cover 30 by a predetermined length. It is displaced to the operating position shown in. In this state, if the operating rod 44 is slid and displaced so as to enter the stopper hole 46c, the step plate 32
Is fixed in the operating position.

As a result, an operator or the like can operate the step plate 3
You will be able to use 2 as a foothold to climb to the top of the machine room and get off the sidewalk. Then, by gripping the connecting rod 45 at this time, it is possible to more stably climb and descend. Moreover, although the step plate 32 is soiled by being put on the foot, it is the tread surface 33 that is soiled, which is the surface facing the inner surface of the side cover 30 in the stored state and the outer surface. Since the cover constituting surface 34 is not contaminated, when the cover constituting surface 34 constitutes a part of the side cover 30, the stain is not conspicuous in part.

In each of the above-mentioned embodiments, the step plates are provided in the upper and lower two stages, but the number of the step plates is not limited to this, and it can be used in a large construction machine. May be provided with a larger number of step plates. Further, the opening / closing means for displacing the step plate between the operating position and the storage position is arranged above the side cover, but this opening / closing means is provided in the vertical portion of the side cover or the like. You can also do so.

[0026]

As described above, according to the present invention, a plurality of openings are formed in the vertical direction of the side cover, and each opening has an operating position in a substantially horizontal direction and a storage position in a substantially vertical direction. Since a step plate that rotates so that it can be positioned is mounted between them, and each of these step plates is configured to be displaced between the operating position and the storage position by the opening / closing means, when the sidewalk is passed, the step plate is Can be stowed out of the way, and when it is necessary to get on and off the upper part of the machine room, the step board can be used as a scaffold to easily get on and off.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator as an example of a construction machine provided with a side step of the present invention.

FIG. 2 is a cross-sectional view of a portion taken along line XX in FIG. 1 showing a configuration in a stored state in a side step showing the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an operating state of the side step of FIG.

FIG. 4 is an external view showing a lever lock mechanism.

FIG. 5 is an explanatory diagram showing a configuration of a stopper piece in the lever lock mechanism.

FIG. 6 is a cross-sectional view of a state in which a side step according to a second embodiment of the present invention is stored.

FIG. 7 is a sectional view showing an operating state of the side step of FIG.

FIG. 8 is a perspective view of a side step of FIG.

FIG. 9 is a structural explanatory view of a lock mechanism of an operating rod.

FIG. 10 is an external view of a hydraulic excavator including a side step according to the related art.

FIG. 11 is an external view of a hydraulic excavator having a side step according to another conventional technique.

[Explanation of symbols]

 1 Upper revolving structure 4 Machine room 6 Side walk 10, 30 Side cover 11, 31 Opening 12, 32 Step plate 14 Hinge 15 Stopper arm 16, 16a, 16b Operation wire 18 Lever 20 Stopper piece 22 Lock release lever 34 Cover surface 35 shaft 36 lifting rod 38 lever 42 rotating shaft 44 operating rod 45 connecting rod 46 guide hole

Claims (5)

[Claims] 1. A side step provided on a side cover attached to an upper swing body of a construction machine, wherein the side cover is formed with a plurality of openings in a vertical direction, and each of the openings has a substantially horizontal direction. A step plate that pivotably moves between the operating position and the storage position in the substantially vertical direction, and an opening / closing means that displaces each step plate between the operating position and the storage position. Side step of the characteristic construction machine. 2. The side step of a construction machine according to claim 1, wherein the step plate, in its operating position, is in a state of protruding outward of the side cover. 3. The side step of a construction machine according to claim 1, wherein the step plate is in a state of protruding inside the side cover in the operating position thereof. 4. The side step of a construction machine according to claim 1, wherein the opening / closing means is configured to be opened / closed in conjunction with each other by link means connected to the step plates. 5. A handle is rotatably provided at an upper position of the side cover, and the link means is operated by rotating the handle to move the step plate between an operating position and a storage position. The side step of the construction machine according to claim 4, wherein the side step is configured to be displaced between them.