JPH06316950A - Driver's seat of construction machine - Google Patents

Abstract

PURPOSE:To alleviate fatigue of a driver and to improve operation efficiency by easily stabilizing the upper part of the body of the driver. CONSTITUTION:A lower side arm member 20 of an arm member A is attached to the center of an upper fitting 7a of a supporting leg 7 in such a manner that the position of the member 20 can be adjusted and fixed in back and forth directions. An upper side arm member 21 of the arm member A is connected to the member 20 through a hinge 23 and a hook 24. A supporting member 26 provided with a cushion 26b for receiving the stomach or the chest of the driver is attached to the member 21 in such a manner that the position of the member 26 can be vertically adjusted and fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab for hydraulic excavators and other construction machines.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a hydraulic excavator. A revolving unit 2 is rotatably mounted on a tracked traveling unit 1. A boom 4 that constitutes the work implement F is mounted on the front part of the revolving structure 2 so as to be capable of undulating, and a driver's cab 3 is installed on the side of the front part. An arm 5 is connected to the tip of the boom 4 so that the boom can be lifted, and a bucket 6 is attached to the tip of the arm 5 so as to be rotatable.

As shown in FIGS. 11 and 12, a driver's seat device S is installed on the floor plate 3a of the driver's cab 3. A seat 8 on which an operator M sits is attached to a supporting leg 7 that constitutes the driver's seat device S, a backrest 9 is attached to a rear end portion of the seat 8, and an armrest 10 is provided in an intermediate portion of the backrest 9.
Is attached. Operating levers 11 and 12 and a footrest 13 are installed on the floor plate 3a on the front side of the driver's seat device S.

The operator M sits on the seat 8 and operates the operation lever 11 to perform excavation work by the boom 4, the arm 5 and the bucket 6 and the revolving structure 2, and operate the operation lever 12. Thus, the traveling body 1 travels. During the work, the operator M receives various vibrations transmitted from the vehicle body. The stability of the operator M against the vibrations is as follows: the seat 8, the backrest 9, the armrest 10, the footrest 1
3 and floor board 3a. Further, the support leg 7, the seat 8, the backrest 9, and the armrest 10 are provided with an adjusting mechanism so as to match the physique of the operator M.

[0005]

In the driver's cab 3 described above, when the operator M operates the operating lever 12 by hand to travel, the upper half of the body leans forward. Further, at the time of deep digging work, the operator M leans forward with the upper body and moves the operation lever 11. When working while descending the slope, the posture of the operator M leans forward. Therefore,
The operator M tends to be unstable. Therefore, the operator M must step on the floor plate 3a with both feet, which requires extra force and accelerates fatigue. In addition, it is difficult to stabilize the upper half of the body, which adversely affects the operation of the operation levers 11 and 12, resulting in a decrease in work efficiency.

The present invention has been made in view of the above problems, and provides a driver's cab provided with an upper body stabilizing device that can easily stabilize the upper body without applying extra force to the legs of a driver. The purpose is to provide.

[0007]

The driver's cab of the present invention is characterized in that an upper body stabilizing device having a supporting member for receiving the abdomen or chest of the operator or the vicinity thereof is arranged. The support member is configured so that its position can be adjusted according to the physique and working conditions of the operator, and that it can be moved to the retracted position so as not to hinder the operator from getting on and off and working. There is.

[0008]

[Operation] An operator who sits down on the seat of the driver's seat device presses the upper body against the support member to stabilize it.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described. In this embodiment, an upper body stabilizing device is attached to the driver's seat device S. 1 to 3, the same components as those in FIGS. 11 and 12 are designated by the same reference numerals.

An upper frame body 14 having an inverted U-shaped cross section is fixed to the central portion of the upper metal fitting 7a of the support leg 7.
A lower frame 15 having a U-shaped cross section is housed inside. Both frames 14 and 15 are connected by a pin 16 inserted into a pin hole provided at the front upper end of each frame. Both frames 1
The width from the middle to the rear end of the side plate portions 4 and 15 is narrow. The lower frame body 15 includes the upper fitting 7a and the lower frame body 1.
5 and elastically supported via a bottle 17 penetrating the flat plate portion of the upper frame body 14 and attached, and a coil spring 18 interposed between the flat plate portions of both frame bodies 14 and 15 of the bottle. Therefore, the pin 16 can swing about the fulcrum.

A fixing frame body 19 having an inverted U-shaped cross section is housed in the lower frame body 15 so as to be slidable up and down, and a horizontal portion of the lower arm member 20 of the arm member A is accommodated therein. 20a is inserted. An elongated hole 20b is provided in the horizontal portion 20a. The flat plate portion of the lower frame body 15, the fixing frame body 19
Screw holes 15a and 19a are provided in the flat plate portions of the upper plate 7a and the upper metal fitting 7a, respectively.
The threaded rod portion of the screw 22 is inserted through the hole provided in the. The middle of the screw 22 is the long hole 20b of the lower arm member 20.
Penetrates through.

The upper arm member 21 of the arm member A is the lower arm member 20.
Is connected by a hinge 23. A hook 24 is rotatably attached to the upper arm of the lower arm member 20 on the side opposite to the hinge.
And the hook 24 is attached to the upper arm member 2
The upper arm member 21 is fixed to the lower arm member 20 by being hooked by the hooking protrusion 25 provided at the lower end of the first arm 1.

A support member 26 is attached to the upper end of the upper arm member 21 for receiving the abdomen or chest of the operator M, or the vicinity thereof. The support member 26 includes a support fitting 26a, a cushion 26b made of a non-slip material fixed to the support fitting 26a, and a bracket 26c integrated with the support fitting 26a. The bracket 26c is fixed to the upper arm member 21 with a fixing screw 27.

The horizontal portion 20a of the lower arm member 20 is fixed by tightening the fixing screw 22 and pressing it by the fixing frame body 19. If the fixing frame 19 is loosened, the horizontal portion 20a
Can be slid in the front-back direction within the range of the length of the long hole 20b. That is, the arm member A can adjust the position in the front-back direction.

Further, by disengaging the hook 24 from the hooking protrusion 25, the upper arm member 21 is bent around the hinge 23 as a fulcrum, and the upper arm member 21 and the lower arm member 20 have substantially the same height as the seat 8. Can be kept at

The height of the support member 26 can be changed according to the physique of the operator M by adjusting the fixing position of the bracket 26c with respect to the upper arm member 21.

With the above-described structure, the support member 26 can be adjusted in position in the front-rear direction and the vertical direction according to the physique of the operator M, and the operation of the operator M getting on and off and the work for which this stabilizer is not necessary. In this case, the stabilizer can be stored below the seat 8. In addition, friction occurs between the cushion 26b and the abdomen or chest of the operator M, and the movement of the upper half of the operator M in the front-back direction can be restricted.

The present invention is not limited to hydraulic excavators,
Of course, it can be applied to wheel type hydraulic excavators, hydraulic type cranes, bulldozers and the like.

[0019]

According to the present invention described above, it is possible to easily stabilize the upper half of the body of the operator, reduce fatigue of the operator, and improve work efficiency.

[Brief description of drawings]

1 is a sectional side view corresponding to FIG. 11, showing an embodiment of the present invention;

FIG. 2 is an enlarged side view showing the upper body stabilization device in FIG.

FIG. 3 is a cross-sectional side view showing an upper frame body, a lower frame body, and a fixing frame body portion in FIG. 1;

FIG. 4 is an enlarged perspective view of a lower frame body in FIGS. 2 and 3;

5 is an enlarged perspective view of the fixing frame body in FIGS. 2 and 3;

FIG. 6 is an enlarged perspective view of a horizontal portion of the lower arm member shown in FIGS. 2 and 3.

FIG. 7 is an enlarged side view showing the detached hook of the arm member of FIG. 2 and its vicinity.

FIG. 8 is a front view of FIG.

9 is a front view showing a state in which a hook is hooked from the state of FIG. 7,

FIG. 10 is a side view showing an example of a hydraulic excavator,

FIG. 11 is a side view of the cab of the conventional hydraulic excavator, taken along line XX in FIG.

FIG. 12 is a plan view of FIG. 11.

[Explanation of symbols]

 7 Support Legs 7a Upper Metal Fittings 8 Seats 14 Upper Frames 15 Lower Frames 16 Pins 17 Bolts 18 Coil Springs 19 Frames for Fixing 19a Screw Holes A Arm Members 20 Lower Arm Members 20a Horizontal Parts 20b Long Holes 21 Upper Arm Members 22 Screw 23 Hinge 24 Hook 25 Hooking protrusion 26 Support member 26a Support metal fitting 26b Cushion 26c Bracket 27 Fixing screw

Claims (3)

[Claims] 1. A construction machine in which a driver's cab is installed on a machine body, wherein an operator's cab having an upper body stabilizer provided with a support member for receiving an operator's abdomen or chest, or the vicinity thereof. 2. The structure according to claim 1, wherein the position of the support member can be adjusted according to the size of the operator and working conditions.
The listed cab. 3. The driver's cab according to claim 1, wherein the support member can be moved to a retracted position so as not to hinder the operator from getting on and off and working.