JP4510717B2 - Construction machinery cab structure - Google Patents

Description

  The present invention relates to a cab structure for a construction machine, and more particularly to a cab structure for a construction machine in which large electrical components such as an air conditioner are mounted behind a cab seat.

  The conventional cab structure of this type of construction machine is such that a large electrical component such as an air conditioner is mounted behind the cab seat, a fixture is fixed to the inner wall of the rear portion, and a plate is attached to the fixture, Is known in which a storage portion is formed over the back portion of the cab (see, for example, Patent Document 1).

  Further, there is known a cab structure of a construction machine in which a frame reinforcing plate is extended between the pillars or the side panels substantially perpendicular to the pillars or side panels standing on both sides of the cab seat (for example, patents). Reference 2).

  In addition, as shown in FIG. 4, a large electrical component 4 such as an air conditioner is mounted behind the seat 3 installed on the floor 2 of the cab 1, and a fixture 5 is fixed to the rear inner wall of the cab 1. Wear 6 A small electrical component 7 such as a fuse box is installed on the upper surface of the plate 6 as necessary. Further, the front surface and the upper portion of the large electrical component 4 are covered with a cover 8.

In addition, as shown in FIG. 5, a structure in which a pillar 9 is erected from the floor 2 at the rear of the cab 1 and a plate 6 is placed on the pillar 9 to cover the large electrical component 4 is also considered. It is done.
Japanese Patent Laid-Open No. 11-21951 JP-A-11-165660

  In the invention described in Patent Document 1, when components such as a seat and an air conditioner are attached to the floor in advance, when the cab is put on and fixed from above, the storage portion is stored behind the seat so that the components do not come into contact with the components. A part is provided. Therefore, the upper surfaces of large electrical components such as air conditioners mounted behind the cab seat are all covered with the plate mounted on the rear inner wall. For this reason, when inspecting and maintaining the large electrical component, the plate must be removed, and the maintainability is poor.

  Further, in the invention described in Patent Document 2, a frame reinforcing plate is extended between pillars or side panels standing on both sides of a cab seat in order to obtain sufficient strength against a falling load. Although the rigidity of the cab is improved by the frame reinforcing plate, when inspecting and maintaining large electrical components such as an air conditioner mounted behind the seat, the frame reinforcing plate must be removed. The nature is bad.

  In the conventional cab structure shown in FIG. 4 and FIG. 5, the plate needs to be removed at the time of inspection and maintenance of a large electrical component, similarly to the above-mentioned patent document. In particular, when a small electrical component such as a fuse box is installed on the upper surface of the plate, careful attention and a long time are required for removing the plate so as not to damage the small electrical component. Further, when a cover is attached, the plate is further removed after the cover is removed, and the maintainability is extremely poor.

  Therefore, large electrical components such as an air conditioner are mounted behind the cab seat, and maintenance is improved when inspecting and maintaining large electrical components in a construction machine that covers the front and top of the large electrical components with a cover. Therefore, a technical problem to be solved arises, and the present invention aims to solve this problem.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is such that a large electrical component such as an air conditioner is mounted behind the cab seat and covers the front and top of the large electrical component. In construction machinery covered in
A cab of a construction machine in which a beam member is disposed in the left-right direction near the front upper portion of the large electrical component, both ends of the beam member are fixed to the left and right wall surfaces of the cab, and the cover is attached to the beam member. ,
A cab structure for a construction machine is provided, wherein a small electrical component such as a fuse box is attached to the beam member .

  According to this configuration, since both end portions of the beam member are fixed to the left and right wall surfaces of the cab, a cover that covers the front surface and the upper portion of the large electrical component can be attached to the beam member. By opening or removing the cover, the entire large electrical component is exposed, and the large electrical component can be inspected and maintained even when the beam member is still disposed.

  According to this configuration, since the beam member is located near the front upper part of the large electrical component and in the immediate vicinity of the seat, the small electrical component such as a fuse box having a high maintenance frequency is attached to the beam member. In addition, inspection and maintenance of small electrical components can be performed easily.

According to a second aspect of the invention, in the cover, a construction machine according to claim 1, characterized in that a lid for servicing on SL large electrical equipment or small electrical components to be openable or detachable Provides the structure of the cab.

  According to this configuration, by opening or removing the lid provided on the cover during maintenance, the large electrical component or the small electrical component in the cover is exposed, and inspection and maintenance can be performed.

According to the first aspect of the present invention, the beam members are fixed to the left and right wall surfaces behind the cab seat, and the beam member is provided with a cover for covering the front surface and the upper portion of the large electrical component. Is covered with a cover, the safety in the cab can be improved, and the appearance is not impaired. When inspecting and servicing large electrical components, opening or removing the cover exposes the entire large electrical component so that inspection and servicing can be performed even with the beam members still in place, improving maintainability. .
Further, according to the present invention, by attaching a small electrical component such as a fuse box to the beam member, a small electrical component having a high maintenance frequency is disposed near a seat where it is easy to maintain, and the maintainability is remarkably improved.

In the invention according to claim 2 , since the cover is provided on the cover so that the cover can be opened and closed or detached, there is no need to remove the cover when inspecting and maintaining the large electrical component or the small electrical component, and the lid is simply opened or removed. Thus, it is possible to inspect each electrical component in the cover, and further improve the maintainability.

  Hereinafter, the structure of the cab of a construction machine according to the present invention will be described with reference to preferred embodiments. The purpose of improving the maintainability when inspecting and maintaining large electrical components in a construction machine in which large electrical components such as air conditioners are mounted behind the cab seat and the front and top of the large electrical components are covered with a cover This is realized by arranging a beam member in the left-right direction near the front upper part of the large electrical component, fixing both ends of the beam member to the left and right wall surfaces of the cab, and attaching the cover to the beam member.

  FIG. 1 shows a hydraulic excavator 10 as an example of a construction machine, and an upper swing body 13 is mounted on a lower traveling body 11 via a swing mechanism 12 so as to be rotatable. The upper swing body 13 is provided with a cab 14 on one front side thereof, and a boom 15 is attached to the front center portion so as to be able to be raised and lowered. Further, an arm 16 is attached to the tip of the boom 15 so as to be rotatable up and down, and a bucket 17 is attached to the tip of the arm 16.

  2 and 3 show the inside of the cab 14, a seat 21 is installed on the floor surface 20 inside the cab 14, an operation lever 22 is provided in front of the seat 21, and an air conditioner or the like is provided behind the seat 21. A large electrical component 23 is mounted.

  Near the front upper portion of the large electrical component 23, the beam member 24 is disposed in the left-right direction, and both ends of the beam member 24 are fixed to the left and right wall surfaces 25 of the cab 14. Considering the case where the large electrical component 23 is removed during maintenance, the beam member 24 is preferably a removable fixing method such as bolting. In this embodiment, L-shaped steel is used as the beam member 24. However, the material and shape of the beam member 24 are not particularly limited, and can be formed of other members. A small electrical component 26 such as a fuse box is attached to the beam member 24.

  A front surface and an upper portion of the large electrical component 23 are covered with a cover 27 over the interior width of the cab 14, and the cover 27 is divided into an upper cover 27a and a lower cover 27b. The upper cover 27a is curved in an arc shape and is disposed so as to cover the upper part of the large electrical component 23, and its upper end is fixed to the back surface 28 of the cab 14 and its lower end is fixed to the beam member 24. To do. The upper cover 27a is attached by a detachable fixing method such as bolting, and the upper cover 27a can be removed as needed during maintenance.

  Alternatively, an upper end portion or a lower end portion of the upper cover 27a may be pivotally attached so that the upper cover 27a can be opened upward or forward during maintenance. In this case, maintainability is improved as compared with the above-described removal of the upper cover 27a.

  On the other hand, the lower cover 27 b is disposed so as to cover the front surface of the large electrical component 23, and a lower end portion thereof is fixed to the floor surface 20 of the cab 14 and an upper end portion thereof is fixed to the beam member 24. Further, a lid H that can be opened and closed or detachable is provided in the vicinity of the upper end of the lower cover 27b. The size of the lid H is not particularly limited, and the lid H can be provided over the interior width of the cab 14, or the lid H may be provided only in the vicinity of the small electrical component 26 attached to the beam member 24. .

  When the lid H is provided across the cabin width of the cab 14, the front of the large electrical component 23 in the cover and the small electrical component 26 can be removed by opening or removing the lid H provided on the lower cover 27b during maintenance. Exposed. On the other hand, when the lid H is provided only in the vicinity of the small electrical component 26, only the small electrical component 26 is mainly exposed.

  In either case, the large electrical component 23 or the small electrical component 26 in the cover 27 is exposed by opening or removing the lid H during maintenance, so the upper cover 27a as well as the lower cover 27b must be removed. Therefore, the large-sized electrical component 23 or the small electrical component 26 can be inspected and maintained. After the maintenance is completed, the lid H is closed or attached to return to the original state.

  Thus, the maintainability is remarkably improved as compared with the conventional configuration.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is a side view of a hydraulic excavator to which the present invention is applied. The side view which shows the inside of the cab which concerns on this invention. The principal part perspective view which shows the inside of the cab which concerns on this invention. Explanatory drawing which shows an example of the structure of the conventional cab. Explanatory drawing which shows another example of the structure of the conventional cab.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Excavator 14 Cab 21 Seat 23 Large electrical component 24 Beam member 25 Left and right wall surface 26 Small electrical component 27 Cover 27a Upper cover 27b Lower cover 28 Rear H Cover

Claims (2)

In a construction machine in which a large electrical component such as an air conditioner is mounted behind the cab seat and the front and top of the large electrical component are covered with a cover,
A cab of a construction machine in which a beam member is disposed in the left-right direction near the front upper portion of the large electrical component, both ends of the beam member are fixed to the left and right wall surfaces of the cab, and the cover is attached to the beam member. ,
A cab structure for a construction machine, wherein a small electrical component such as a fuse box is attached to the beam member. To the cover, the structure of the construction machine cab according to claim 1, wherein the lid it was only set to be openable or removable for servicing the large electrical equipment or small electrical components.

Images