JPH10219743A - Cab for construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the getting-on-off to and from a cab by installing a getting-on-off door on the front of the cab disposed to the revolving superstructure of a construction equipment. SOLUTION: In the cab 10 mounted on the revolving superstructure 6 of a hydraulic backhoe 2, etc., a getting-on-off door 12 is set up onto the front of a cab body 14. Approximately the whole surface is opened in the front panel of the main body 14 at that time while the getting-on-off door 12 is slid along the front of the main body 14 and a ceiling surface and opened and closed and housed to the underside of a ceiling panel under an opened state. The getting-on-off door is fitted rotatably in the vertical direction centering around a hinge installed to the upper section of the front of the cab body in place of the sliding of the door 12. Accordingly, since there is a lower structure on the front of the cab directed towards the travelling direction of the construction equipment even at a narrow job site, a space is ensured surely, an operator can be elevated and lowered easily to and from the cab by utilizing the space, the structure of the cab can be simplified, and the shape of the cab can be designed and manufactured easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab of a construction machine, and more particularly, to a cab disposed on an upper revolving structure of a construction machine having a lower traveling structure and an upper revolving structure.

[0002]

2. Description of the Related Art A hydraulic shovel, a crane truck or the like, which is a typical construction machine having an upper revolving structure rotatably mounted on a lower traveling structure, includes a lower traveling structure having traveling means such as tracks or wheels, and an engine. An upper revolving structure having a room and a working device is provided, and a cab including a driver's seat is provided on the upper revolving structure. The getting on and off of the cab is performed by opening and closing the getting on and off doors provided on any one of the left and right sides of the cab.

[0003] This type of construction equipment is usually put on and off the cab.
The construction is carried out in a state in which the longitudinal direction of the lower traveling structure, which is the occupant's riding traveling posture or the occupant's getting-off parking posture, and the longitudinal direction of the upper revolving structure, which is the longitudinal direction of the cab, are substantially matched. Beside the machine (generally on the left side)
Get on and off the cab from. In some cases, utilizing the characteristics of a construction machine having an upper revolving structure, the upper revolving structure may be rotated with respect to the lower traveling structure, the upper revolving structure may be positioned at an arbitrary position around the vehicle, and the passenger may get on and off at that position. Done. However, not all steps or equivalents for getting on and off are prepared at all positions, and the turning state is not a normal parking posture of the construction machine, so it is not a general getting on and off method.

[0004]

The conventional construction machine of the type described above has the following problems to be solved. (1) In a narrow work site, for example, underground work, in-building work, urban area work, road work, river work, etc., there are many situations where an obstacle such as a structure is adjacent to a side surface including a door for a construction machine. Occur. In addition, the entrance door cannot be sufficiently opened due to the obstruction, and it is difficult to get on and off during the operation. If the upper revolving structure is swiveled to a position where the entrance door can be opened, the upper revolving structure, for example, the end of the engine room protruding outward, interferes with an obstacle. Therefore, it is necessary to move the door to a wide area where the door can be opened for getting off the vehicle and getting on the vehicle later. However, it is difficult to secure a large space when work is mainly performed in narrow places and getting on and off during work is frequently required. Moving to a site may hinder the efficiency of construction work. In such a situation, in the case of a relatively small hydraulic excavator that is often used at this kind of site, the size of the upper revolving superstructure viewed from above is set outside the width of the lower traveling superstructure even in the revolving state. A structure has been developed in which the upper revolving structure can be turned regardless of surrounding obstacles within the width of the body of the lower traveling structure so as not to be small. In addition, the door is slid along the side of the cab body to open and close.
Sliding doors have been developed. However, these complicate the structure of the cab and increase product costs,
There are problems such as the size of the cab being limited, the cabin interior space being narrow and the livability being poor, and being difficult to adopt for large construction machines. (2) It is important to provide a cab of a construction machine with an appropriate strength for protecting a driver against, for example, a falling object from above the cab. For this reason, it is desirable that the cab structure has a simple structure balanced in front, rear, left, and right from the viewpoint of manufacturing. However, when a door is provided on one side surface of this type of cab and the door is opened, it is necessary to reinforce the periphery of the door with a thick pillar, a reinforcing member, or the like in order to maintain the strength of the entire cab. . Then, the cab becomes complicated in structure, structurally unbalanced, and the cost of designing and manufacturing becomes high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a technical problem thereof is to provide a construction machine having an upper revolving unit which is rotatably mounted on a lower traveling unit. It is an object of the present invention to provide a cab for a construction machine, which is easy to get on and off the cab, and simple in structure.

[0006]

According to the present invention, a cab of a construction machine for solving the above technical problem is provided with a door for getting on and off the cab at a front surface of the cab. Cab is provided.

That is, according to the present invention, as a cab of a construction machine for solving the above technical problems, a lower traveling body,
In a cab arranged on the upper revolving structure of a construction machine having an upper revolving structure rotatably mounted on the lower traveling structure, the cab is provided with an entrance door at a front surface of the cab. A cab for a construction machine is provided.

[0008] Advantageously, the door is slidably opened and closed along the front and ceiling surfaces of the cab. Alternatively, the door may be conveniently opened and closed by pivoting up and down about a hinge installed at the top front of the cab. Preferably, the construction machine is a hydraulic shovel.

In the cab of the construction machine according to the present invention, the cab door is provided at the front of the cab. Therefore, even in a narrow work site, a space is always secured by the existence of a crawler belt, for example, in front of the front of the cab facing the running direction when the construction machine enters the site, for example, by the presence of a crawler belt, Getting on and off the cab can be easily performed through this space. Also,
The cab structure is simple and easy to design and manufacture because there is no door on the side of the cab, and the door on the front of the cab, which is conventionally provided with a relatively large front window. become.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a cab of a construction machine constructed according to the present invention will be described below in more detail with reference to the accompanying drawings. In the embodiment, a description will be given using a hydraulic shovel, which is a typical construction machine including an upper swing body on a lower traveling body.

Referring to FIG.
Has a lower traveling body 4 provided with a pair of traveling crawler tracks 4a and 4b, and an upper revolving body 6 rotatably mounted on the lower traveling body 4. Upper revolving superstructure 6
Is equipped with an engine room 7 at the rear, a cab 10 according to the present invention at the front left, and a working device 8 at the front. The working device 8 is provided with a bucket 8a. Cab 1
On the front surface of the cab 10, a door 12 is mounted on the cab body 14 so as to be openable and closable (the cab 10 will be described later in detail). Each of the pair of traveling crawler tracks 4a and 4b includes an idler 4c provided at one end in the front-rear direction of the lower traveling body 4 and a sprocket 4 serving as crawler drive wheels provided at the other end.
It is wound around d. A traveling crawler belt 4a is located below the cab 10 and extends in the front-rear direction.

Referring to FIG. 2, the cab 10
A cab body 14 having a substantially rectangular parallelepiped shape;
And a door 12 which is provided at the front of the vehicle so as to be openable and closable. Inside the cab body 14, a driver's seat 30 is provided facing the front of the cab, and steering devices 32 are provided on both sides of the driver's seat 30.

The cab body 14 is mainly formed of a steel plate, and includes a front panel 14a, a ceiling panel 14b, a left side panel 14c, a right side panel 14d, a rear panel (not shown), and a bottom panel (not shown). Not). These panels are joined to each other or to a cab frame (not shown) mainly by welding and assembled. The left side panel 14c and the right side panel 14d are formed substantially identically, and each of the left side panel 14c and the right side panel 14d has a window opening 14e as shown in the left side panel 14c.
Is provided so as to open substantially half or more of the left side panel 14c, and a window glass is fitted with a window sash or seal rubber. The front panel 14a is opened substantially all over, and the entrance door 12 is provided in the opening.

The door 12 is slid along the front surface and the ceiling surface of the cab and is opened and closed. When the door 12 is opened, it is accommodated in the lower surface of the ceiling panel 14b. Door 1
2 has a door frame 12a which is substantially rectangular and forms the contour of the entrance door 12. A pair of upper and lower rollers 12b are provided on the left side (the left side panel 14c side) of the door frame 12a, and the rollers 12c substantially identical to the rollers 12b are provided on the right side (the right side panel 14d side) of the door frame 12a. However, a pair of rollers 12b is provided with the same mounting position and the upper and lower positions of the roller 12b. The rollers 12b and 12c are provided on a guide rail 14f provided between the ceiling panel 14b of the cab body 14 and the left side panel 14c.
A roller 12b is provided along a guide rail 14g provided between the ceiling panel 14b and the right side panel 14d.
The doors 12 are opened and closed by the rollers 12c sliding along, respectively. As the slide mechanism, a well-known sliding window opening / closing device (for example, a window opening / closing device disclosed in Japanese Patent Application Laid-Open No. 8-20971 proposed by the present applicant) can be adopted. Glass 12d is fitted into the door frame 12a. Also,
A door handle 12e including a door latch for fixing the door 12 to the cab body 14 or opening the fixed state is provided below the door frame 12a. Thus, the entry / exit door 12 is attached to the cab body 14 so as to be freely opened and closed.

In the cab of a conventional construction machine, the left side panel 14 is provided with a door for getting on and off and forming a passage for getting on and off.
Inside c, a control device 32 such as an operation lever and an instrument, and a dwelling facility 34 such as an air conditioner and a storage box are provided.

Referring to FIG. 3, a cab 20 including a door 22 which is another embodiment of the door is described. The cab 20 comprises a cab body 24 and a hinge 26 installed on the upper front of the cab body 24. At the center, there is provided a door 22 which pivots up and down to open and close from an illustrated closed position to an open position indicated by a two-dot chain line. The cab body 24 is basically the same as the cab body 14 described above, and is mainly formed of a steel plate.
4c, a right side panel 24d, a rear panel (not shown), and a bottom panel (not shown). These panels are joined to each other or to a cab frame (not shown) mainly by welding. Left side panel 24c and right side panel 24d
Are formed substantially identically, and each of the left side panel 24c and the right side panel 24d has a concave cutout 24f with which the entrance door 22 is engaged in the closed position as shown in the left side panel 24c. It is formed on the front side of the cab body 24. Each of the left side panel 24c and the right side panel 24d has a window opening 24e as shown in the left side panel 24c.
The window glass is fitted with a window sash or sealing rubber. A substantially entire front surface of the cab body 24 is opened, and the door 22 is provided in the opening. The getting-in / off door 22 is connected to the cab 20
The cross section viewed from above forms a channel shape in which both ends are bent rearward from the front side of the cab body 24 to form the left and right side surfaces of the cab 20, and the bent end 2
2b and 22c are respectively engaged with the concave notches 24f of the left side panel 24c and the right side panel 24d when the door 22 is in the closed position. At the front end of the cab body 24 at the upper end of the door frame 22a, a door hinge 26, which may be a known one, is provided. Door frame 22a
The glass 22d is integrally molded in a channel shape in cross section, or is formed by bonding and fitted therein. A door handle 22e including a door latch for fixing the entry / exit door 22 to the cab body 24 or opening the fixed state with the cab body 24 is provided at a lower portion of the door frame 22a. Further, a gas cylinder (not shown) for assisting the smooth opening and closing of the door 22 is provided between the door 22 and the cab body 24. Thus,
The entry / exit door 22 is attached to the cab body 24 so as to be freely opened and closed.

The operation of the cab 10 and the cab 20 of the construction machine configured as described above will be described with reference to FIGS. The cab 10 will be described mainly with reference to FIGS. 1 and 2, and the cab 20 shown in FIG. 3 will be described with the corresponding reference numerals in parentheses or supplemented in the description.

The cab 10 (20) of the construction machine constructed as described above has a door 12 which can be opened and closed on the front surface thereof.
Since (22) is provided, (1) getting on and off the cab is easy. That is, since the space is secured by the lower traveling body 4 in front of the cab 10 (20), the rider 12e (24e) operates the handle 12e (24e) on the ground or on the crawler belt 4a to get on the vehicle. ) Is released, and the crawler belt 4a is used as a step to get on the cab 10 (20). At the time of getting off, the opening / closing door 12 (22) is opened by operating an opening / closing handle (not shown) provided inside the door 12 (22), and
Go down to the ground as a step. The entrance door 22 provided on the cab 20 is provided at both ends 2 of the entrance door 22.
2b and 22c make it easier to get on and off because the entrance to the cab body 24 is substantially widened. (2) The cab structure is simple. That is, cab 1
The left side surface and the right side surface of 0 (20) may have basically the same shape and structure. In addition, the cab 10 provided with the entrance door
The front surface of (20) is a portion where a window is formed over the entire surface of the conventional cab for a front working view, and special columns, reinforcement, and the like are not substantially required for the conventional cab. (3) The visibility on the side of the cab is good. That is to say, there is no longer a conventional door provided on the side surface of the cab 10 (20) for the entrance door and the entrance door, and there is no column for reinforcing the opening, so that a large window with good visibility is provided. Can be. (4) The space in the cab can be effectively used widely. That is, a steering device or the like can be installed inside the cab in which the entrance door is provided in the conventional cab. (5) It is convenient for a hydraulic excavator. That is, the hydraulic excavator 2 is a typical construction machine that works in a narrow work site, and the work efficiency is further improved by mounting the cab of the present invention.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various changes or modifications can be made within the scope of the present invention. . For example, the entrance door may be provided with a sash window that can be opened and closed freely without fitting glass over the entire surface.

[0020]

According to the cab of the construction machine constructed according to the present invention, (1) getting on and off the cab is easy,
(2) A cab for a construction machine having a simple structure is provided.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hydraulic excavator including a cab of a construction machine configured according to the present invention.

FIG. 2 is a perspective view of the cab shown in FIG.

FIG. 3 is a perspective view showing another embodiment of the cab.

[Explanation of symbols]

 2: Hydraulic excavator (construction machine) 4: Lower traveling structure 6: Upper revolving structure 10, 20: Cab 12, 22: Boarding door 14, 24: Cab body

Claims (4)

[Claims] 1. A cab disposed on an upper revolving structure of a construction machine having a lower traveling structure and an upper revolving structure rotatably mounted on the lower traveling structure. A cab for a construction machine, wherein a door is provided on a front surface of the cab. 2. The cab of a construction machine according to claim 1, wherein the door is slidably opened and closed along a front surface and a ceiling surface of the cab. 3. The cab of a construction machine according to claim 1, wherein said door is opened and closed by pivoting up and down around a hinge installed at a front upper portion of said cab. 4. The cab of a construction machine according to claim 1, wherein said construction machine is a hydraulic shovel.