JP2001058553A - Top guard for operator protection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable installation on a cab roof of various working vehicles that have a turning table equipped on the upper face, and then to have a fine outer design properties matched to the appearance form of the cab as well, and to enable to keep operability, workability of a working machine and safety of operators, without hindering its circling function. SOLUTION: The cab has, at least at one part, circular outer lateral side 1d that is swelling outward along a turning arc face of a turning table 3. An outer side face of a top guard body 5 fitted on roof of above-mentioned cab for the protection against a destruction by falling rocks forms a curved surface 5a in almost the same curvature with that of the outer lateral side 1d of the cab, and is arranged within the turning range between the turning radius of the cab 1 and the maximum turning radius R of the turning table 3. At the time of turning of the cab, it becomes possible for a hydraulic shovel 10 to turn without the protrusion of the top guard body 5 toward outside of the range of the maximum turning radius R of the turning table 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a top guard for protecting a driver, which is mounted on a roof of a cab of various working vehicles for construction and civil engineering, for example, and is prevented from being destroyed by falling objects. The present invention relates to a top guard for driver protection that can be installed without impairing good external appearance and designability and operability and workability of a working machine according to the external shape of the vehicle.

[0002]

2. Description of the Related Art Conventionally, various types of work vehicles for construction and civil engineering work sufficiently ensure the safety of drivers and the like in order to prevent accidents at work sites. As an example of such a work vehicle, there is a hydraulic excavator that performs excavation work at a place higher than the ground surface such as a mine or a hillside.

According to a standard hydraulic excavator, for example, as shown in FIGS. 3 and 4, a roof 1a of a cab 1 having a substantially rectangular box shape is provided with a top for protecting a driver from disasters such as falling rocks at a construction site. A guard body 2 is provided. The top guard body 2 is made of a substantially rectangular steel plate, and is fixed to the roof 1 a of the cab 1. The top guard body 2 includes a windshield 1 disposed on the front of the cab 1.
The projection protrudes outward beyond the maximum turning radius of the turntable 3 from the upper part of c toward the front.

[0004] The cab 1 is provided on one side in front of a swivel 3 installed on a traveling body (not shown) via a swivel support (not shown). It turns so as to draw a locus smaller than the radius. Further, a working machine (not shown) is provided adjacent to the cab 1 at a front portion of the swivel 3. An engine hood 4 is provided on the back side of the cab 1.

[0005]

The conventional hydraulic shovel includes a hydraulic shovel as shown in FIGS. 5 and 6 in addition to the standard hydraulic shovel. The excavator is provided with a box-shaped cab 1 having a substantially frustoconical half-shape and provided on one side of a front portion of a swivel base 3. In this conventional hydraulic excavator, the outer side portion 1d of the cab 1 has a portion forming an arc surface having a radius of curvature substantially equal to the maximum turning radius of the swivel base 3, and the maximum turning radius of the swivel base 3 is provided. It is arranged within. The outer side portion 1d of the cab 1 has a portion forming an arc surface bulging outward to secure a larger living space than a cab of a conventional standard hydraulic excavator. A work machine (not shown) is provided in front of the swivel 3 adjacent to the cab 1, and the work machine turns around the cab 1 around the center of swivel of the swivel 3. It has become. The rear of the swivel 3 is the engine hood 4
Is almost covered by

In view of the safety of the driver and the like, the top guard main body 2 made of a substantially rectangular steel plate attached to the roof of the substantially rectangular box-shaped cab 1 installed on the above-mentioned standard hydraulic excavator. However, when the cab 1 of the above-mentioned hydraulic excavator is applied to the cab 1 as it is, as described above, the outer side 1d of the cab 1 in the form of a box having a substantially frustoconical shape is formed by the standard hydraulic excavator. As shown in FIG. 5 (b), the top guard body 2 is provided on the inside of the cab 1 near the center of the roof 1a because the shovel is set to have a size larger than that of the cab 1 so as to protrude outside. Just by covering, the portion of the top plate surface of the roof 1a that protrudes outward is exposed from the top guard body 2 to the outside. For this reason, the top guard body 2 cannot completely cover the roof 1a, and as described above, the outer side portion 1d of the cab 1 is easily broken by a large collision such as a falling rock, and the safety of the driver is maintained. There is a problem that it is difficult.

Therefore, in order to avoid such a danger for the driver, as shown in FIG. 6B, the width of the top guard body 2 is increased to completely cover the roof 1a of the cab 1. Although the cab 1 can completely protect the cab 1 from destruction due to falling rocks, since the entire top plate surface of the roof 1a is completely covered by the top guard body 2,
The front end corner of the top guard body 2 is greatly extended beyond the outer side 1 d of the cab 1.

As a result, when the turntable 3 turns, the front end corner of the top guard body 2 moves beyond the turn path of the outer side 1d of the cab 1 and has a locus larger than the maximum turning radius of the turntable 3. And make a circuitous turn above the driver's head. For this reason, the front end corner of the top guard main body 2 may accidentally collide with a peripheral device such as a working machine working around the vehicle, a worker's body, a rock wall of an excavation site, or the like. Danger and the like arise.

When the work machine is operated in the vicinity of the swivel base 3, the work machine easily interferes with the front corner of the top guard body 2 so as to avoid interference with the top guard body 2. Troublesome work is required, so that the operability and workability of the working machine are extremely deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and a specific object of the present invention is to attach a cab to a roof of a cab in various work vehicles having a swivel provided on an upper surface of a traveling body. It is possible to maintain good operability, workability, and safety of the driver without impairing the swivel function of the work machine, while having a good appearance design that matches the external shape of the cab. To provide a top guard for protecting the driver.

[0011]

The object of the present invention is to swell outwardly along a swivel surface of a swivel provided on the upper surface of a traveling body according to the first aspect of the present invention. A cab having at least a part of an arc-shaped outer side portion thereof, and various types of construction / civil work vehicles equipped with a top guard body for protecting a driver on a roof of the cab, The outer surface of the top guard main body has a curved surface along the outer side portion of the cab, which is effectively achieved by a top guard for protecting a driver.

Here, the shape of the outer surface of the top guard body in the present invention includes a curved surface having substantially the same radius of curvature (surface) as the arc-shaped outer side bulged outwardly of the cab.
A curved surface having a different radius of curvature from the arc-shaped outer side portion bulging to the outside of the cab, or a front portion and a rear portion of the arc-shaped outer side portion bulging to the outside of the cab are different. A curved surface or the like obtained by a continuous change in curvature is effectively adopted.

According to the first aspect of the present invention, the top guard body is provided with a cab roof that conforms to the outer shape of the cab having at least partly an arc-shaped outer side bulging outward. All top surfaces are completely covered.

By employing such a configuration, it is possible to turn the top guard body without exceeding the range of the maximum turning radius of the turntable when turning the turntable,
The vehicle body can be freely moved without impairing the turning function originally provided in the turning table. Therefore, the safety of the driver and the like can be sufficiently ensured, and good workability and operability of the working machine are guaranteed.

The top guard body according to the present invention is optionally attached to a cab. However, since the outer surface of the top guard main body has a curved surface along the arc-shaped outer side portion of the cab that bulges outward along the turning arc surface of the swivel table, the outer shape of the cab In addition to being able to smoothly integrate with the shape without a sense of incongruity, it is possible to obtain an appearance design that matches the external shape of the cab, and to sufficiently enhance the commercial value.

In addition to the configuration of the first aspect, as set forth in the second aspect of the present invention, the outer surface of the top guard main body is set within a range of a maximum turning radius of the swivel base, thereby being set in advance. The maximum turning radius of the turning table is maintained, and the workability and operability of the working machine can be maintained, and the appearance of the product can be appropriately and reliably achieved.

According to the second aspect of the present invention, the outer side surface of the top guard main body is disposed within a turning range between the turning radius of the cab and the maximum turning radius of the turning table.
According to this configuration, the outer side surface of the top guard body does not turn around outside the maximum turning radius of the turntable when the turntable turns.

Therefore, in addition to the function and effect described in the first aspect, it is possible to turn the turntable without disturbing the driver's operational feeling, and to work around the vehicle when turning the turntable. It is possible to prevent a risk that the top guard body collides with a peripheral device, a worker's body, a surrounding rock wall, or the like, which is being used.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. 1 and 2
FIG. 1 is a representative first embodiment of the present invention. FIG. 1 is a perspective view and a plan view of a cab of a working vehicle equipped with a top guard body for protecting a driver, and FIG. 2 is a side view of the same. In these drawings, the same members as those in the above-described conventional technology are denoted by the same reference numerals as those in FIGS.

Hereinafter, the front side of the cab is referred to as a front portion, the rear side is referred to as a rear portion, and the cab is referred to as up, down, left and right as viewed from the front. In the present embodiment, a hydraulic excavator, which is a construction / civil vehicle, will be described as an example. However, the present invention is not limited to this, and technical solutions that can be easily changed by those skilled in the art from those embodiments. Naturally, the above range is also included.

In these figures, reference numeral 10 denotes a small turning type hydraulic excavator, and the hydraulic excavator 10 is mounted on a traveling body (not shown) so that the swivel 3 can turn via a turning support (not shown). Have been. One front side of the swivel 3 is provided with a cab 1 having a windshield 1c and the like. The cab 1 is in the form of an approximately frustoconical half-split box that bulges out in an arcuate shape outwardly to the right side of the swivel 3. The living space is larger than the shovel cab.
The outer side portion 1d of the cab 1 is formed with a curvature surface smaller than the radius of curvature of the maximum turning arc surface of the turning table 3, and a part thereof is disposed on the maximum turning radius R of the turning table 3.

On the roof 1a of the cab 1, a top guard body 5 for protecting a driver for protecting the driver from disasters such as falling rocks at a construction site is mounted. The top guard body 5 is made of a high-rigidity steel plate formed separately from the cab 1.

As shown in FIG. 2, the front surface of the cab 1 extends upward from the floor surface 1b of the cab 1 rearward in order to widen the driver's field of view and avoid interference with the work equipment. An inclined surface 1e is gradually inclined, and a windshield 1c is arranged there. The tip of the top guard body 5 extends slightly from the upper end of the inclined surface 1e toward the front, and the lower surface of the tip is gradually inclined upward and forward. One eaves portion 5b is provided, and the upper front view of the driver is secured.

An engine hood 4 that covers an engine (not shown) is disposed at the rear rear portion of the cab 1. A boom (not shown), which is a base of a working machine, is installed at a substantially central portion of the swivel base 3 so as to be swivelable adjacent to an inner side of the cab 1. It is equipped to be able to move up and down, bend and swivel around. The boom is pivotably supported by a boom cylinder (not shown) for operating the boom. An arm (not shown) is pivotally supported at an end of the boom by an arm cylinder (not shown) attached to the boom so as to be vertically swingable.

Further, a base of a bucket (not shown) is directly attached to the arm at the tip end support portion so as to be vertically swingable. The bucket is pivotally supported by a link (not shown) attached to the arm via a bucket cylinder (not shown). The hydraulic excavator 10 configured as described above is no different from the conventional work vehicle equipped with the cab 1 in the shape of a box having a substantially frustoconical shape, and the present invention is not limited to the above embodiment. Absent.

The most characteristic point of the present invention is that, as can be understood from the illustrated example, the cab 1 has an arc-shaped outer side portion 1d bulging outward along the turning arc surface of the turning table 3. An outer surface of a top guard body 5 for protecting a driver, which is provided on at least a part of the roof 1a of the cab 1 and is mounted on the entire top surface of the roof 1a, is curved along the outer side portion 1d of the cab 1. It has a curved surface 5a. The outer side surface of the top guard main body 5 is arranged within a range of a maximum turning radius R of the turntable 3.

In this embodiment, as shown in FIG. 1, the top guard main body 5, which is a feature of the present invention, matches the set size of the roof 1a of the cab 1 and It completely covers the whole. This top guard body 5
Has an arc-shaped curved surface 5a having substantially the same curvature as the outer side portion 1d of the cab 1, and has an arcuate curved surface 5a.
Has a radius of curvature smaller than the maximum radius of curvature R of the swivel 3. As shown in FIG. 2, the tip of the top guard body 5 extends from the upper end of the front surface of the cab 1 to just above the tip of the floor 1b to form an eaves portion 5b.

In the present invention, the top guard body 5
Of the outer surface of the cab 1 as described above.
The curved surface 5a is not necessarily limited to the curved surface 5a having an arc having a curvature radius substantially the same as that of the cab 1. The curved surface 5a has a curvature radius different from that of the arc-shaped outer side portion 1d bulging outward on the cab 1, or A curved surface or the like that continuously changes with different radii of curvature at the front portion and the rear portion of the arc-shaped outer side portion 1d bulging outward on the outer side of the cab 1 can be effectively adopted. However, in any case, the turning table 3 does not protrude from the maximum turning radius R.

According to the above configuration, when the swivel base 3 is swiveled, the top guard body 5 swivels in a swivel area between the maximum swivel radius R of the swivel base 3 and the swivel radius of the cab 1. Accordingly, the free turning performance and running performance of the excavator 10 are not impaired without impairing the original turning function of the turning table 3. Although the top guard body 5 is formed separately from the cab 1, it has substantially the same contour as the outer shape of the cab 1 in plan view. For this reason, it integrates with the external shape of the cab 1 without a sense of incongruity, and secures a good appearance design suitable for the external shape of the cab 1 and sufficiently enhances the commercial value.

The top guard body 5 of the present invention constructed as described above does not turn beyond the turning arc surface of the turntable 3 unlike the above-mentioned prior art, and the entire top plate of the roof 1a of the cab 1 is not rotated. Since the top guard main body 5 can be fixed so as to cover the surface, the safety of the driver or the like can be sufficiently ensured. In addition, since the visibility of the driver is not obstructed by the top guard body 5 except for the eaves portion 5b, the operation of the work machine can be performed smoothly and the work can be performed efficiently.

As is clear from the above description, according to the top guard for protecting the driver of the working vehicle according to the present invention, an arc-shaped outer side portion 1d bulging outward from the cab 1 is provided.
, All the roofs 1a of the cab 1 are covered, and accordingly, the safety of the driver and the like and the improvement of the commercial value as a good appearance are achieved.

Further, since the outer portion of the top guard main body 5 is disposed within the range of the turning radius between the turning radius of the cab 1 and the maximum turning radius R of the turning base 3, the top guard main body 5 is Since the outer portion does not turn and protrude within the range of the maximum turning radius R of the turning table 3, it can be used for equipment around the hydraulic excavator, workers working around the excavator, or surrounding rocks. The risk of collision is prevented, safety is ensured, and operations and operations can be performed smoothly and efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view and a plan view of a cab of a working vehicle equipped with a driver protecting top guard body according to the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view and a plan view of a cab equipped with a driver protection top guard body in a conventional work vehicle.

FIG. 4 is a side view of the same.

FIG. 5 is a perspective view and a plan view of a cab equipped with another example of the top guard body.

FIG. 6 is a perspective view and a plan view of a cab to which still another example of the top guard body is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cab 1a Roof 1b Floor surface 1c Windshield 1d Side 1e Inclined surface 2,5 Top guard body 3 Revolving base 4 Engine hood 5a Curved surface 5b Eave part 10 Maximum excavator radius of working vehicle R revolving base

Claims (2)

[Claims] 1. A cab having at least a portion of an arc-shaped outer side bulging outward along a turning arc surface of a turning table mounted on an upper surface of a traveling body, and a cab roof. In various work vehicles for construction and civil engineering work equipped with a top guard body for protecting the driver, the outer surface of the top guard body has a curved surface along the outer side portion of the cab. A top guard for protecting a driver, which is provided. 2. The top guard for protecting a driver according to claim 1, wherein an outer surface of the top guard body is disposed within a range of a maximum turning radius of the swivel base.