JP2003096826A - Guard device for working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guard device for a working machine such as construction machinery, in which the weight of a guard is reduced and a take-up storage part is downsized by reducing the volume of the guard when the guard is taken up. SOLUTION: This guard device 5 is equipped with: the take-up storage part 6 which is installed in the rear of a skylight 10 of a roof part 9 of a driver's cab; and the guard 8 which is pulled out from the storage part 6. The guard 8 comprises: a shutter part 15 which covers a front window 11 of the cab 3; and a part 16 corresponding to the skylight 10, which is joined to the shutter part 15 and whose volume in a taken-up state is smaller than that of the shutter part 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a guard device provided with a vandalism guard that protects a front window of a cab of a work machine.

[0002]

2. Description of the Related Art In construction machines, especially hydraulic excavators that are often held on road shoulders during construction, it is necessary to prevent mischief such as damage to the window glass in the cab due to stones or the like. Regarding the windows on the side other than the front window of the cab,
It can be dealt with by changing the material from glass to reinforced resin such as polycarbonate. However, since the front window is wiped off with a wiper, a resin that is easily scratched cannot be used, and glass is used. Therefore, in order to protect the front window made of glass in the driver's cab, a guard made of a plurality of iron plates that can be attached to the driver's cab is provided.

In this conventional structure, when the construction machine is stopped on the road shoulder or the like, the iron plate is fixed to the operator's cab with bolts or the like. When working on the construction machine, the iron plate is removed from the operator's cab and stored in a storage box provided in the machine body. However, in such a conventional structure, since the heavy iron plate is attached and detached, a heavy labor is required. Further, in the conventional structure, since it is necessary to store the iron plate in the storage box provided in the machine body, if there is not enough space to store the guard in the machine body of the construction machine, it may be difficult to store it. .

Therefore, the above-mentioned drawback can be solved by installing a shutter-type guard device instead of the iron plate. However, when the winding and storing unit is arranged behind the skylight on the roof of the operator's cab, the front upper part The field of view of the shutter is not damaged, but the total length of the shutter is long, so the volume when the shutter is wound is large. Therefore, the winding / storing section needs a large capacity and a large and robust structure, and the shutter itself becomes heavy.

[0005]

The present invention was devised in view of the above circumstances, and the skylight does not have to be made of glass as described above, but can be made of a reinforced resin such as polycarbonate. Therefore, it is not necessary to protect the part corresponding to the skylight with a shutter-type guard, so the guard is divided into a front window corresponding part and a skylight corresponding part, the former has a shutter structure, and the latter when winding up rather than the shutter. An object of the present invention is to provide a guard device for a working machine such as a construction machine, which has a small and lightweight structure with a small volume.

[0006]

In order to achieve the above object, in the invention of claim 1, a guard device for protecting a front window of a cab of a working machine is provided behind a skylight provided on a roof of the cab. A winding storage unit installed, a pair of left and right guide rails provided from the installation position of the winding storage unit to the lower end position of the front window, and a retractable storage unit provided in the winding storage unit along the guide rails. And a guard for covering the front window, and the guard includes a shutter portion for covering the front window of the driver's cab and a skylight corresponding portion provided above the shutter portion. The technical means is to use a flexible member or structure that is thinner than the shutter portion and has a small volume when wound.
In addition, in the invention of claim 2, the technical means that the skylight corresponding portion of the guard is made of cloth or wire. Further, in the invention of claim 3, the technical means that the skylight corresponding part of the guard is formed in a mesh shape.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments in which the guard device for a working machine according to the present invention is applied to a hydraulic excavator as an example of a construction machine will be described below with reference to the drawings. The hydraulic excavator 1 has a well-known structure including a lower traveling body 2 and an upper revolving body 4 which is provided on the lower traveling body 2 so as to be rotatable and has an operator cab 3. A guard device 5 is attached to the operator's cab 3 as shown in FIGS. 1, 2, and 5.

The guard device 5 includes a winding / storing portion 6 installed in the operator's cab 3, a guide rail 7 extending from the winding / storing portion 6, and a winding / removing portion provided in the winding / storing portion 6. And a guard 8 having flexibility in the direction.

In the operator's cab 3, a roof window 9 (hatch portion) 10 made of a reinforced resin is formed on a roof portion 9 thereof, and a front window 11 made of glass is provided on a front surface thereof. Front pillars (front pillars) 12 serving as window frames are arranged on the left and right sides of 11.

The winding / storing section 6 is fixed to a rear portion of the roof 9 of the operator's cab 3 beyond the skylight 10. A winding shaft core 13 to which the base end of the guard 8 is connected is pivotally supported in the winding storage section 6.

In the present embodiment, the shaft core 13 is provided with a winding urging spring (not shown) for urging the pulled-out guard 8 in the winding direction. This winding urging spring is an upward urging force that attempts to wind up the guard 8, and by appropriately balancing the downward force due to the weight of the guard 8 to wind and wind the guard 8. It is designed to reduce the operating force for

Next, a pair of left and right guide rails 7 are provided. The guide rails 7 pass through the skylight 10 of the roof portion 9 from the installation location of the winding and accommodating portion 6 and are parallel to each other along the front pillars 12 and the front windows 11 are provided.
It is designed to extend to the lower end position of. The guide rail 7 may be formed integrally with the front pillar 12, or may be provided in front of the front pillar 12 through a supporting means such as a pillar, and its mounting structure and mounting position may be different. There is no particular limitation.

The guard 8 has a flexible structure that can be wound into a roll, and the left and right ends of the guard 8 are slidably fitted to the guide rails 7. Then, from the open position where the windshield 11 and the skylight 10 are not covered and are stored in the winding storage portion 6, it is possible to displace to the closed position where the windshield 11 and the front windshield 11 are pulled out along the guide rail 7 and cover the entire surface of the skylight 10 and the front windshield 11. Has become.

In the illustrated example, the tip 8a of the guard 8 is bent to have an L-shaped cross section in the illustrated example so that it can be easily placed on the hand, and is pulled down to the window frame 14 at the lower end of the front window 11 or the window. It is pulled down to a receiving piece 14 ′ which is provided so as to project on the frame 14 or which is horizontally installed between the lower ends of the guide rails 7 and which abuts the shutter tip end without a gap.

The guard 8 is composed of a shutter portion 15 that covers the front window 11 of the cab 3, and a skylight corresponding portion 16 that extends above the shutter portion 15 and covers the skylight 10. The skylight corresponding portion 16 is made of a flexible member or structure that is thinner than the shutter portion 15 and has a small volume when wound.

That is, the shutter portion 15 is engaged with the slats 17, 17 vertically adjacent to the laterally extending slats 17 so as to be pivotally or flexibly engaged.
a and 17b are provided to have flexibility, and are set to have a predetermined thickness in relation to strength. Therefore, in the skylight corresponding portion 16 shown in FIG.
With slats 18 thinner or shorter than 7,
It has a thin shutter structure. In the figure, 18
Reference numerals a and 18b are a pair of engaging portions for giving flexibility to the slat 18, and 18b 'is formed at the base end of the thin slat 18 for engaging with the engaging portion 17a of the distal slat 17. It is an engaging part.

Alternatively, only the left and right ends of the slat 17 (portions fitted to the guide rails) may be used, and the independent left and right ends may be integrally connected by a wire material or a plate material. Further, not only the horizontal direction but also the vertically oriented wire material or plate material may be connected to form a mesh shape.

In the above construction, the flexible structure by hooking the slats to each other is used for the skylight corresponding portion 16, but instead of this, a flexible member 19 such as a flexible wire rod, plate or cloth is used. You may use (refer FIG. 4). That is, a pair of plate members or wire flexible members 19 extending in the longitudinal direction at both left and right ends and fitted into the guide rails 7 are connected to the shutter portion 15, and a space between the pair of left and right plate members or wires is laid horizontally. The structure may be such that they are connected by an extending horizontal member (which may be a plate material or a wire material). In this case as well, it is not limited to the configuration in which the laterally-extending horizontal bridging material is stretched, and may be in the form of a mesh connected vertically and horizontally. Alternatively,
Instead of these, a sheet shutter using cloth may be used.

The upper end of the skylight corresponding portion 16 is connected to the shaft core 13, and the lower end is directly fixed to the upper end of the shutter portion or is connected via an interposition tool 20. As described above, the skylight corresponding portion 16 may be any one that can guide the shutter portion 15 to the entrance of the winding storage portion 6 when the guard 8 is wound, and has a protective function as a cover like the shutter portion 15. You don't have to.

The guard 8 may be pulled out or wound up by a manual type or an automatic type. However, in this embodiment, the winding storage section 8 is located behind the skylight 10 and is out of reach of the operator. It is preferable to provide a motor (hydraulic type, electric type, etc.) for rotationally driving the winding shaft core 13 so as to automatically draw and wind. The guard 8 can be pulled out or wound up from the shaft core 13 by rotating the motor in the normal and reverse directions by operating a switch in the operator's cab 3.

Further, the guard 8 may be provided with a lock device (not shown) so as to be fixed at the closed position. Although not shown, this locking device is provided with, for example, a locking rod and a claw that can be displaced to a locking or unlocking position on the shutter-type guard 8 side, and a guide rail 7 on the fixed side and the tip of the shutter portion 15 on the closing position. A hole or a receiving portion for receiving the lock rod or the claw is provided in the frame at the contact position, and the guard 8 is closed to displace the lock rod or the claw in the locking direction to engage with the hole or the receiving portion on the fixed side. Let it lock, etc.
Other known locking means can be used. This locking means may be provided with a locking device so that the above engagement cannot be disengaged. Or without a locking device,
The guard 8 may simply be pulled down to the closed position.

In the above embodiment, a hydraulic excavator was illustrated as an example of the working machine, but in the present invention, a guard device can be similarly provided in a working machine provided with a driver's cab having a front window. The member corresponding to the skylight and the flexible structure are not limited to those in the above embodiment, and a chain structure or a known flexible structure or material can be used as long as it is thin and lightweight. In addition, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[0023]

As described above, in the guard of the working machine according to the present invention, the shutter portion covering the front window of the driver's cab in the guard and the flexible member having a smaller volume in the wound state than the shutter portion. Alternatively, since it is made of a structure, the volume of the winding and accommodating portion can be reduced to reduce the size and weight. Further, since the weight of the guard can be reduced, it is possible to easily open and close the guard.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a guard device for a hydraulic excavator.

FIG. 2 is a perspective view showing a state where a guard of the guard device is partially raised.

FIG. 3 is a partial cross-sectional view illustrating a guard portion.

FIG. 4 is a partial cross-sectional view illustrating another guard portion.

5 is a side view showing the entire hydraulic excavator including the guard device of FIG. 1. FIG.

[Explanation of symbols]

1 hydraulic excavator 3 cab 5 Guard device 6 winding storage 7 Guide rail 8 guards 9 roof 10 skylight 11 front window 12 front pillar 15 Shutter part 16 Skylight support 17 Slat of shutter 18 Slat for skylight 19 Flexible materials such as plates, wires, and cloth

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Eiji Akabane             4-10-1, Yoga, Setagaya-ku, Tokyo             Within Mitsubishi Corporation (72) Inventor Noriaki Endo             1-1-1, Shiohama, Kawasaki-ku, Kawasaki-shi, Kanagawa               Press Industry Co., Ltd. (72) Inventor Seiji Hiraoka             6-3-16 Daikaitsu, Hyogo-ku, Kobe-shi, Hyogo               Tomoe Shokai Co., Ltd. F-term (reference) 2D015 EA05

Claims (3)

[Claims] 1. A guard device for protecting a front window of a driver's cab of a work machine, comprising: a winding and storing section installed behind a skylight provided on a roof of the driver's cab; and a position where the winding and storing section is installed. It consists of a pair of left and right guide rails that are provided to the lower end position of the front window, and a guard that is provided so as to be able to move in and out of the winding storage section and that is pulled out along the guide rails and covers the front window. , Consisting of a shutter part covering the front window of the cab and a skylight corresponding part provided above the shutter part, and the skylight corresponding part is thinner than the shutter part and has flexibility with a small volume at the time of winding. A guard device for a working machine comprising a member or a structure. 2. The guard device for a working machine according to claim 1, wherein the portion corresponding to the skylight of the guard is made of cloth or wire. 3. The guard device for a working machine according to claim 1, wherein the skylight corresponding portion of the guard is formed in a mesh shape.