JPH0419094Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to the footrest structure of an ultra-small backhoe.

(b) Prior art In the past, batshoes were introduced as large construction machines, and have gradually evolved into medium-sized and small-sized machines, but recently they have been developed into ultra-compact and passenger-carrying machines, especially for work in confined spaces. It is hoped that a type of Batsukuhoe will emerge.

(c) Problems that the invention aims to solve However, there are problems due to the ultra-small size, namely:
When the backhoe is made ultra-compact, the boarding space for the worker becomes narrower, and parts of the worker's body, especially the feet, protrude outside the machine, creating a danger during turning operations and making the worker unstable and cramped. In particular, one problem that was difficult to solve was adapting the position of the footrest to the size of the worker. .

(d) Means for solving the problem In this invention, a frame-shaped footrest with a side surface bent into an approximately inverted F-shape is arranged above the front edge of the aircraft frame, and the footrest is bent into an approximately inverted F-shape. It is configured to be able to freely rotate back and forth around a pivot point protruding downward from the lower surface of the bending part, and when the footrest is rotated rearward, the rear end of the footrest comes into contact with the upper surface of the fuselage frame. It is an object of the present invention to provide a footrest structure for an ultra-compact backhoe in which the front end of the footrest comes into contact with the front edge of the fuselage frame when the footrest is rotated forward.

(e) Effect In this design, the footrest bent into a substantially inverted F-shape can be tilted back and forth around the pivot at the bottom of the bend, so when the footrest is tilted forward, the lower part of the footrest touches the front end of the floor of the driver's cab. The top of the footrest protrudes forward from the front edge of the floor, making it suitable for supporting the feet of large workers.
When the footrest is tilted backwards, the rear part of the footrest touches the floor surface for stability, and the upper part of the footrest is located above the front edge of the floor, making it suitable for supporting the feet of workers of small build. Regardless of the situation, it is possible to support the worker's feet in an appropriate position.

(f) Effects According to this invention, even though it is an ultra-compact ball hoe, it stably supports the feet of the worker regardless of his or her physique, as shown in the above-mentioned functions, thereby ensuring work safety and improving the safety of the worker. This has the effect of stabilizing the worker's posture, increasing work efficiency, and reducing worker fatigue.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A shows an ultra-small backhoe, in which a rotating base 3 is erected approximately at the center of a traveling frame 2 equipped with a crawler-type traveling device 1, and a rotating base 4 is mounted on the top surface of the base 3.
A substantially rectangular fuselage frame 5 is mounted on the frame 5 so as to be able to turn left and right, a prime mover section 6 is disposed at the rear of the frame 5, a driver section 7 is disposed in front of the prime mover section 6, and a A seat 8 is arranged at a slightly offset position to the left of the center, an operation panel 9 is installed on the right side of the seat 8, and an operation stand 1 is installed at the front end of the driver section 7 in front of the seat 8.
0 is set upright, and a traveling section operating lever 11 and an excavating section operating lever 12 are set upright on the stand 10. In order to match the physique of the worker, the stand 10 can be tilted back and forth and fixed freely around a pivot 14 by operating a lock lever 13, and has a bracket protruding from the front center of the front end of the machine frame 5. A boom support 17, which is the base end of the excavation work section 16, is supported through the support member 15 so as to be rotatable left and right.
The base end of an arm 19 is attached to the tip of the arm 19, and a bucket 20 is attached to the tip of the arm 19 so as to be movable up and down, and a hydraulic cylinder 1 is interposed between the two.
The excavation work is performed by bending and extending each of the above-mentioned members by the extension and contraction operations of 8', 19', and 20'.

Since this Batshoe A is ultra-compact, the operator sits on the seat 8 and rides with the operation stand 10 held between the expanded left and right feet 21.
The passenger's left and right feet 21 reach near the front edge 5-1 of the substantially rectangular body frame 5.

The footrest 22 of the present invention is disposed on the left and right sides of the operation stand 10 on the front edge 5-1 of the aircraft frame 5, and the footrest 22 is a rectangular frame whose central portion is bent into a substantially inverted F-shape. A substantially inverted triangular pivot 24 is provided on the lower surface of the bent portion 23 having a substantially inverted F-shape, and a rotation fulcrum 25 is provided that protrudes upward from the pivot 24 and the front edge 5-1 of the fuselage frame 5. A footrest 22 having a substantially inverted F-shaped frame is supported so as to be freely rotatable back and forth around a pin 26 that is common to both. Therefore, when the footrest 22 is rotated rearward, the rear end 2 of the footrest 22
7 is stabilized by contacting the upper surface 5-2 of the fuselage frame 5, and the rear end 27 and front end 28 of the footrest 22 are stabilized.
becomes the footrest position suitable for a worker with a small physique (see Figure 1), and when the footrest 22 is rotated forward, the front end of the footrest 28, which had been in the front, moves downward and touches the machine frame. The footrest rear end 27, which is stabilized by contacting the front edge 5-1 and was located at the rear, is now located forward of the front edge 5-1 of the machine frame 5, making it suitable for workers with large physiques. This is the footrest position (see Figure 2).

In addition, when working in a narrow field, by keeping the footrest 22 in the backward rotation position, the tip of the footrest 22 is located inside the turning range r at the front corner of the fuselage frame 5, so that the left and right feet 21 are not exposed to the outside. It is safe without coming into contact with obstacles. In order to further improve safety, a safety frame 29 may be provided upright on the left and right sides of the front edge of the body frame 5 (see FIG. 3).

FIG. 4 shows another embodiment, in which the footrest 30 is of a fixed type, protruding forward and upward from the front edge of the body frame 5, and is constructed approximately in the shape of a frame using a round bar or the like.

[Brief explanation of drawings]

FIG. 1 is a side view showing the main parts of the footrest structure according to the present invention, FIG. The figure shows another example. 5... Airframe frame, 5-1... Front edge, 5
-2...Top surface, 22...Footrest, 27...
...same rear end, 28...same front end, 24...same pivot point.

Claims (1)

[Scope of utility model registration request] A frame-shaped footrest 22 whose side surface is bent into a substantially inverted F-shape is disposed above the front edge 5-1 of the fuselage frame 5, and a frame-shaped footrest 22 is provided above the front edge 5-1 of the fuselage frame 5, and a frame-shaped footrest 22 is provided on the lower surface of the bent portion 23 of the footrest 22, which is bent downward into a substantially inverted F-shape. The footrest 22 is configured to be freely rotatable back and forth around the protruding pivot 24, and when the footrest 22 is rotated rearward, the rear end 27 of the footrest 22 touches the upper surface 5-2 of the fuselage frame 5.
The footrest structure of the ultra-small backhoe is configured such that the front end 28 of the footrest 22 comes into contact with the front edge 5-1 of the fuselage frame 5 when the footrest 22 is rotated forward.