JPH08291538A - Car body structure of construction machine - Google Patents

Abstract

PURPOSE: To eliminate a hindrance to getting on and off of an operator by lowering an almost all range of an opening time housing space of a getting on and off door in a side deck upper surface part by one stage more than the side deck upper surface part, and forming it as a stepped inclined face part having a downward gradient. CONSTITUTION: An almost all range of an opening time housing space of a getting on and off door 12 of an upper surface part of a side deck 9 projecting from a side surface of a cab 11 is lowered by one stage more than the upper surfrace part of the side deck 9. At the same time, a stepped inclined face part 10 having a gradient is formed to the outside surface side of the side deck 9 from the outside surface side of the cab 11. Therefore, earth and sand fell on the inclined face part 10 slip down but do not accumulate. Even if they remain in a small quantity, they do not hinder sliding opening-closing of a getting on and off door 12. Therefore, when an upper turning body is turned, the stepped inclined face part 10 and the getting on and off door 12 housed at opening time in its upper side space are prevented from collinding with an external obstacle, and a function of a small turning type hydraulic shovel can be exhibited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to the structure of an upper swing body equipped in construction machines such as hydraulic excavators and work vehicles.

[0002]

2. Description of the Related Art FIG. 7 is an overall side view of a hydraulic excavator described in Japanese Patent Laid-Open No. 6-193095. In the hydraulic excavator shown in Fig. 7, the front upper and lower parts of the door (3) are connected to the side surface of the operating cabin (1) via the upper and lower links (2) and (2), and the side wall of the operating cabin (1) is connected. The door (3) is opened and closed in the front-rear direction by connecting the rear part of the door (3) to the midway position of the rear side of the same via the rear link (4) having substantially the same length as the link (2). It is freely configured.

[0003]

In the conventional hydraulic excavator shown in FIG. 7, since the slide rail is provided in the middle of the side surface of the operating cabin, the soil is prevented from falling on the rail. are doing. Further, the height from the upper surface of the side deck 6 provided at the lower part of the upper swing body 5 to the lower end surface of the door 3 is set to the dimension l, but the falling earth and sand is the rear upper surface of the side deck 6. If a large amount is accumulated, the opening / closing operation of the door 3 will be hindered. Further, when the door 3 is opened, the lower part (b) of the driving cabin 1 is erected at the lower end of the opening of the entrance / exit, so that the driver's entry / exit is hindered. An object of the present invention is to provide a vehicle body structure for a construction machine that can solve the above problems.

[0004]

According to the present invention, an upper revolving structure is provided above a lower traveling structure, and a cab for a driver's cab is arranged on an upper surface side of a side deck below the upper revolving structure. In a construction machine that opens and closes the door for sliding along the outer periphery of the side of the cab, the storage space for opening and closing the door for loading and unloading on the upper surface of the side deck protruding outward from the side of the cab The entire area is formed one step lower than the upper surface of the side deck, and is formed on the step sloped surface portion which is a downward slope from the outer surface side of the cab to the outer surface side of the side deck. The stepped inclined surface portion was set so as not to fall within the width range of the lower end of the opening of the entrance / exit of the cab. Further, the stepped inclined surface portion is formed so as not to project from the inside of a circle whose radius is the maximum turning radius of the upper swing body.

[0005]

In the vehicle body structure of the present invention, the substantially entire range of the storage space for opening the door for getting on / off the side deck upper surface portion projecting outward from the side surface of the cab is one step lower than the side deck upper surface portion, and the outside surface of the cab is Since it is formed on the step sloped surface portion having a downward slope from the side to the outside surface side of the side deck, the earth and sand falling on the stepped sloped surface portion almost slides along the slope surface and is not accumulated. Even if a small amount of earth and sand remains on the stepped sloped surface, the stepped sloped surface is formed one step lower than the upper surface of the side deck, which does not hinder the sliding opening / closing of the entry / exit door. Since the step sloped surface portion is set so as not to fall within the width range of the lower end of the opening / closing opening of the cab, the lower end surface of the opening / closing opening of the cab is a horizontal flat surface having substantially the same height as the upper surface of the side deck. Becomes Therefore, the step sloped surface portion does not hinder the entry and exit of the driver. Further, since the step sloped surface portion is formed so as not to protrude from the circle having the maximum swing radius of the upper swing body as the radius, even when the upper swing body is swung, the step sloped surface portion and the upper side of the step sloped surface portion are formed. It is possible to prevent the door for loading and unloading stored in the space from colliding with an external obstacle.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of a hydraulic excavator having a vehicle body structure according to the present invention. In the figure, 7 is a lower traveling body of the hydraulic excavator, 8 is an upper revolving body provided above the lower traveling body 7, 9 is a side deck below the upper revolving body 8, and 10 is a step formed on the upper surface of the side deck 9. An inclined surface portion, 11 is a cab for the driver's cab arranged on the upper surface side of the side deck 9, 12 is a door for getting on and off the cab 11, and 13 is a work attachment mounted on the front portion of the upper swing body 8.
2 is a plan view seen from A of FIG. 1 (however, in order to clarify the range of the step sloped surface portion 10), the step sloped surface portion 10
Is shaded). In the figure, the circle S
(Shown by an imaginary line) is a circle drawn with a radius of a maximum turning radius R centered on the turning center 0 of the upper-part turning body 8. FIG.
[Fig. 2] is a cutaway view of a main part as seen from B-B in Fig. 1. In the figure, reference numeral 14 is a loading / unloading port of the cab 11, 15 is a sealing member provided along an edge of the loading / unloading port 14 of the cab 11,
C (shown by phantom lines) is the position where the door 12 for passengers is opened, 16 is the stopper for opening the door 12 for passengers, and the dimension W is the width of the opening lower end of the passenger door 14. 4 is shown in FIG.
FIG. 7 is a side view showing a state in which the entry / exit door 12 of the hydraulic excavator in FIG. FIG. 5 is a plan view of the side deck 9 as seen from CC of FIG. FIG. 6 shows D of FIG.
It is the partial cutaway front view seen further.

Next, the vehicle body structure of the present invention and its operation will be described with reference to FIGS. According to the present invention, the open / close storage space of the door 12 at the upper surface of the side deck 9 (the portion indicated by the reference numeral E shown in FIG. 6) protruding outward from the side surface of the cab 11 (the portion indicated by the reference numeral D in FIG. 2) (see the drawing) 2 is one step lower than the upper surface e of the side deck 9 by a dimension h (shown in FIG. 6), and the outer deck side of the cab 11 is located on the side deck 9 side. Was formed on the stepped inclined surface portion 10 having a downward slope by an angle θ toward the outer surface side. As a result, the earth and sand that have fallen onto the stepped inclined surface portion 10 during excavation work of the hydraulic excavator, etc., almost slide down along the inclined surface and do not accumulate. Even if a small amount of earth and sand remains on the step sloped surface portion 10, since the step sloped surface portion 10 is formed one step lower than the upper surface e of the side deck 9, it does not hinder the sliding opening / closing of the entrance / exit door 12. . That is, since the earth and sand falling onto the stepped sloped surface portion 10 can be naturally discharged by the vibration of the vehicle body, etc., the opening / closing door 12 can be smoothly opened / closed.

In the present invention, the step sloped surface portion 10 is provided.
Is set so as not to fall within the width range (width range of the dimension W shown in FIGS. 3 and 4) of the opening lower end of the entrance / exit 14 (shown in FIGS. 3 and 4) of the cab 11. As a result, the opening lower end surface of the entrance / exit 14 becomes a horizontal flat surface having substantially the same height as the upper surface e of the side deck 9. Therefore, since the lower end face of the opening / closing opening 14 which is the horizontal flat surface is used as the tread surface, the step sloped surface portion 10 does not hinder the driver from getting in and out of the vehicle.

Further, in the present invention, the stepped inclined surface portion 10 is formed so as not to protrude from the circle S having the maximum turning radius R (shown in FIG. 2) of the upper turning body 8 as a radius. As a result, even when the upper revolving structure 8 is swung, the stepped inclined surface portion 10 and the door 12 for loading and unloading stored in the space above the stepped inclined surface portion 10 collide with an external obstacle (not shown). Can be prevented.

[0010]

In the vehicle body structure of the present invention, the substantially entire range of the storage space for opening the entry / exit doors on the upper surface portion of the side deck projecting outward from the side surface of the cab is one step lower than that of the upper surface portion of the side deck. Since it is formed on the step sloped surface portion having a downward slope from the outer side surface toward the outer surface side of the side deck, the earth and sand falling on the stepped sloped surface portion almost slides along the slope surface and is not accumulated. Even if a small amount of earth and sand remains on the step sloped surface, the step sloped surface is formed one step lower than the upper surface of the side deck, so it does not hinder the opening and closing of the door for sliding in and out. That is, since it is possible to naturally discharge the earth and sand falling on the stepped slope portion by the vibration of the vehicle body or the like, it is possible to smoothly open and close the entrance door. The step sloped surface portion was set so as not to fall within the width range of the lower end of the opening of the entrance / exit of the cab. As a result, the lower end surface of the entrance / exit opening becomes a horizontal flat surface having substantially the same height as the upper surface of the side deck. Therefore, the driver can get in and out with the lower end surface of the opening and exit of the entrance, which is a horizontal flat surface, as the tread surface. Further, in the present invention, since the step sloped surface portion is formed so as not to project from the circle having the maximum swing radius of the upper swing body as the radius, the step sloped surface portion and the upper portion of the step sloped surface portion are rotated when the upper swing body is swung. It is possible to prevent the door for loading and unloading stored in the side space from colliding with an external obstacle when the door is opened, and to exert the function of the small swing hydraulic excavator.

[Brief description of drawings]

FIG. 1 is a side view of a hydraulic excavator having a vehicle body structure according to the present invention.

FIG. 2 is a plan view seen from A in FIG.

FIG. 3 is a cutaway view of an essential part seen from BB of FIG.

FIG. 4 is a side view showing a state in which a door for getting on and off the hydraulic excavator in FIG. 1 is opened.

FIG. 5 is a plan view of the side deck seen from CC in FIG.

FIG. 6 is a partially cutaway front view seen from D in FIG. 5;

FIG. 7 is an overall side view of a hydraulic excavator according to an embodiment of the prior art.

[Explanation of symbols]

 5,8 Upper revolving structure 6,9 Side deck 10 Step sloped surface 11 Cab 12 Door for entrance / exit 14 Entrance / exit

Claims (3)

[Claims] 1. An upper revolving structure is provided above the lower traveling structure,
In a construction machine in which a cab for the driver's cab is placed on the upper surface side of the side deck below the upper revolving structure, and the door for getting on and off the cab is slidably opened and closed along the outer periphery of the side surface of the cab. , The entire storage space for opening the door for entrance / exit on the upper side of the side deck protruding outward from the side of the cab is one step lower than the upper side of the side deck, and from the outer side of the cab to both outer sides of the side deck. A vehicle body structure for a construction machine, characterized in that the vehicle body structure is formed on a stepped slope portion having a downward slope. 2. The vehicle body structure of a construction machine, wherein the stepped inclined surface portion is arranged so as not to fall within a width range of a lower end of an opening of an entrance / exit of a cab. 3. The vehicle body structure for a construction machine, wherein the stepped inclined surface portion is formed so as not to protrude from a circle having a radius of a maximum swing radius of an upper swing body.