JP3230910B2 - Protective fence structure for excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence structure for an excavator.

[0002]

2. Description of the Related Art Heretofore, there has been a conventional excavator in which a turning radius of an airframe is shortened to facilitate excavation work in a narrow work site. In such an excavator, an excavating unit, an operating unit, and a motor unit are mounted. Since the rotating body to be installed is as small as possible, the space for the driving section is narrow, and a protective fence is erected on the front edge of the floor of the driving section to ensure the safety of the driver's feet. .

[0003] Therefore, the passage for the driver to get on and off, that is, the distance between the end of the protective fence and the seat is very narrow.

Also, the space on the floor in front of the driving section is narrow,
Since the levers for operating the excavation part cannot be provided, the levers are provided on the armrest of the driver's seat.

[0005]

As described above, since the space for the driver to get on and off is small, there is an obstacle for the driver to get on and off.
Touch the levers arranged on the front upper surface of the driver's armrest,
For this reason, there is a danger that the excavation unit and the traveling unit operate unexpectedly.

[0006]

According to the present invention, in an excavator having a protective fence erected in front of an operation unit, the protective fence comprises a fixed protective fence fixed to an airframe and an openable / closable protective fence. In order to provide a protective fence structure for an excavator, an open / close protective fence is constructed so that the open / close protective fence is linked to an open / close operating lever provided in the operation unit and the open / close protective fence is opened and closed by operating the open / close protective lever. Is what you do.

[0007]

An embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an excavator A equipped with a protective fence structure according to the present invention. Reference numeral 1 denotes a traveling unit equipped with a crawler 11, and reference numeral 12 denotes an upright standing on the upper surface of a central portion of the traveling unit 1. A turntable, 13 is a dump plate for bulldozer work, and 14 is a hydraulic cylinder for lifting and lowering the dump plate. Reference numeral 2 denotes a rotating body rotatably mounted on the turntable 12, and a bracket for supporting the excavation part 3 is formed by cutting out a part of the right side of a rotating frame 21 of the rotating body 2. .

[0009] The excavation part 3 is provided on the bracket.
Boom 33, arm 34, and bucket 35 are connected in this order, and between the bracket and the boom 33, the boom 33 and the arm 34
Between the arm 34 and the bucket 35, a boom operating hydraulic cylinder 36 and an arm operating hydraulic cylinder, respectively.
37, a bucket operating hydraulic cylinder 38 is interposed.

On the upper surface of the rotating frame 21, an operating unit 4 is provided from the front to the center, and a motor unit 24 is provided at the rear.

The driving unit 4 includes, as shown in FIGS.
A seat 41 is provided at the rear of the driving unit 4 and an armrest 42 of the seat 41 is provided.
An operation lever 43 for operating the excavation part 3 and the like is provided upright, and a flat floor surface 44 for accommodating the leg of the driver m is formed in front of the seat 41. .

A protective fence 5 is erected in front of the driving section 4, that is, at the front edge 22 of the floor surface 44 to protect the leg of the driver m.

As shown in FIG. 2, the protective fence 5 is composed of a fixed protective fence 51 erected from right in front of the seat 41 to the right and an openable protective fence 52 erected on the right side thereof. Hinge the left edge of the fence 51 and the right edge of the open / close fence 52
53 through the hinge 53
By rotating the opening / closing protection fence 52, the opening / closing protection fence 52 is opened / closed.

From the right edge of the opening / closing protection fence 52, the floor surface
44, a rotating shaft 54 is vertically provided, a rotating lever 55 is protruded from the lower end of the rotating shaft 54, and the tip of the rotating lever 55 is pushed and pulled. It is linked to the tip.

The proximal end of the push-pull wire 56 is connected to a middle part of an opening / closing operation lever 58 protruding from a front side surface of the armrest 42 of the seat 41 so as to be rotatable up and down around a fulcrum 57. The opening / closing protection fence 52 is opened by the upward operation, and the opening / closing protection fence 52 is closed by the downward operation.

With the above configuration, when the open / close protective fence 52 is closed, the feet of the driver m are protected, and when the driver m gets on / off, the open / close operating lever 58 is operated upward to open / close the protective fence.
By opening 52, the side edge of the opening / closing fence 52 and the seat 41 are opened.
The space between the front end of the vehicle, that is, the passage space for the driver getting on and off is expanded, which is convenient not only for getting on and off, but also for increasing the distance between the protective fence 5 and the seat 41.
A part of the body or clothes of the driver m is placed on the armrest of the seat 41.
Touching the operating levers 43 arranged at 42 is prevented,
It is possible to prevent a danger that the traveling unit 1, the excavating unit 3, and the like operate unexpectedly.

FIGS. 2 to 7 show a stable support device 6 for maintaining the stability of the excavating machine A during excavation work. The left and right support levers 61 are provided on the front side surface of the traveling frame 15 of the traveling section 1. And a pivot 64 for pivoting the proximal end of a hydraulic cylinder 63 for lifting and lowering the support device.
And protruding.

At the end of the left and right support lever 61, as shown in FIG. 5, a substantially round pipe-shaped support body 65 is provided.
As shown in FIG. 6, an extension pipe 67 covered with a cover 66 made of a soft material such as rubber is fitted to the left and right ends of the support section main body 65, and the extension pipe 67 is fixed to the support section main body 65 by fixing pins 68. It is fixed to the left and right ends of the. Also, the pin insertion hole of the fixing pin 68
By replacing with 69, the width of the support portion main body 65 can be changed.

Further, a pivoting portion 70 for pivotally connecting the tip of the hydraulic cylinder 63 is provided between the middle portions of the left and right support levers 61, and the support cylinder body 65 is raised and lowered by the operation of the hydraulic cylinder 63. I have to.

FIG. 7 shows another embodiment in which the central portion of the support portion body 65 is cut off so as not to hinder the operation of the bucket 35.

With the above configuration, during the excavation work, the stability of the excavator A is enhanced by lowering the support portion main body 65 at the tip of the left and right support lever 61 by the hydraulic cylinder 63 for elevating and lowering the support device and making contact with the ground. can do.

Further, since the extension pipe 67 covered with a cover 66 made of a soft material such as rubber is externally fitted to the left and right ends, which are the grounding portions of the support portion body 65, even when working on a pavement road surface. The lateral width of the support body 65 can be changed according to the type of work by replacing the fixing pins 68 without damaging the road surface.

[Brief description of the drawings]

FIG. 1 is an overall side view of an excavator equipped with a protective fence structure according to the present invention.

FIG. 2 is a perspective view of the protective fence and an operation unit.

FIG. 3 is a perspective view of a stable support device.

FIG. 4 is a side view of the stable support device.

FIG. 5 is a perspective view of a support portion main body and a support lever.

FIG. 6 is an axial cross-sectional view of a support portion main body and a cover.

FIG. 7 is a perspective view of a support portion main body and a support lever (another embodiment).

[Explanation of Signs] A Excavator 3 Drilling unit 4 Operation unit 5 Protective fence 51 Fixed protective fence 52 Opening / closing protective fence 58 Opening / closing operation lever

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02F 9/24 E02F 9/16

Claims (1)

(57) [Claims] 1. An excavator A having a protective fence (5) standing in front of an operating section (4), wherein said protective fence (5) is openable and closable with a fixed protective fence (51) fixed to an airframe. Composed of an open / close protective fence (52), the open / close protective fence (52) is linked to an open / close operating lever (58) provided in the operation unit (4), and the open / close protective fence is operated by operating the open / close protective fence (58). A protective fence structure for an excavator constructed to open and close the fence (52).