JPH0885979A - Revolving position indicating device of construction machine - Google Patents

Abstract

PURPOSE: To permit an operator at a driver seat to simply and quickly acknowledge the advancing direction of the body of a construction machine by sensing the revolving position of an upper revolving body relative to a lower running body. CONSTITUTION: Two light emitting devices in fore-and-aft arrangement are installed on each of the two control levers 18, 19 furnished at the driver seat 17. On the basis of the sensing value of a revolving position sensing device 20, a control part 21 judges in which region the upper revolving body 14 lies, i.e. (1) in the forward facing region, (2) backward facing. (3) left facing, (4) or right facing, and the position of the running motor is displayed by turning on and off the light emitting devices in differing mode from region to region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning position display device for a construction machine, and more particularly to a turning position display device for a construction machine provided with an upper turning body which can turn in all directions with respect to a lower traveling body. It is a thing.

[0002]

2. Description of the Related Art In a conventional construction machine of this type, a traveling motor is independently mounted on a lower traveling body, and the left and right traveling motors are drive-controlled by two operating levers provided in a driver's seat.
Further, the upper revolving structure is capable of revolving in all horizontal directions with respect to the lower traveling structure, and when performing work by revolving the upper revolving structure, the operator may position the front part of the lower traveling structure in any direction. It is difficult to determine if you are doing it.

Therefore, when moving the construction machine,
The operator visually recognizes the direction of the lower traveling body from the driver's seat and confirms in which direction the aircraft is moving.

[0004]

Conventionally, the direction of the lower traveling body is confirmed by the operator's visual observation as described above. However, depending on the machine, the direction of the lower traveling body when viewed from the driver's seat is difficult to understand. , There is a risk of accidental driving.

Therefore, the turning position of the upper revolving structure with respect to the lower traveling structure is detected so that the operator can easily and quickly recognize the position of the traveling motor of the lower traveling structure in the driver's seat to prevent accidents due to erroneous operation of the operating lever. A technical problem to be solved in order to prevent the occurrence occurs, and the present invention aims to solve this problem.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and an upper revolving structure is mounted on a lower traveling structure so as to be freely rotatable in all directions. In a construction machine in which the left and right traveling motors are driven and controlled by a book operation lever, two light emitting devices are provided in the front-rear direction on the knobs of the two operation levers, and A device for detecting the turning position of the upper revolving superstructure is provided, and it is determined by the detection device whether the upper revolving superstructure is located in any of the forward-facing region, the backward-facing region, the left-facing region, and the right-facing region. A turning position display device for a construction machine is provided, which is provided with a control unit that turns on and off the light emitting device differently for each region in order to display the position of the traveling motor corresponding to the region.

[0007]

When the upper revolving structure is revolving, the revolving position detecting device detects the revolving position of the upper revolving structure, and the upper revolving structure is located in any one of the frontward area, the rearward area, the leftward area, and the rightward area. The control unit determines whether or not it is present. Then, the light emitting devices provided on the operation knob, two light emitting devices each in the front-rear direction, are turned on / off differently for each region corresponding to the region of the upper revolving structure, and the position of the traveling motor corresponding to the region of the upper revolving structure is changed. Is displayed to let the operator recognize it.

[0008]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a hydraulic excavator 11 as an example of a construction machine, in which an upper revolving structure 14 is mounted on a lower traveling structure 12 equipped with left and right crawlers via a ball race 13. The traveling motors 15 and 16 are mounted on the left and right rear portions of the lower traveling body 12, and the left and right traveling motors 1 and 19 are driven by two operation levers 18 and 19 provided in the driver's seat 17.
5 and 16 are drive-controlled.

Although not shown, the ball race 13
A ring gear is provided on the inner side of, and a pinion gear meshing with the ring gear is rotated by a motor so that the upper revolving structure 14 revolves in all horizontal directions. Further, a sensor such as a potentiometer or a micro switch is provided on the swivel joint so that the upper swing body 1
4, the turning position detecting device 20 is formed. Alternatively,
A sensor such as a photoelectric switch or a vapor switch may be provided on the ball race 13 to form a turning position detecting device for the upper turning body 14.

Thus, the range of the lower traveling body 12 with respect to the forward direction F is the forward region, the range is the backward region,
Set the range of to the left area and the range of to the right area,
Based on the detected value of the turning position detecting device 20, the control unit 21 determines in which region the boom center line C of the upper turning body 14 is located.

As shown in FIGS. 2 and 3, the driver's seat 1
Knobs 18a of the two operating levers 18 and 19 provided on the
Two light emitting devices 22, 23 and 24, 25 are provided on the surface of 19a in the front-back direction. The light emitting devices 22 to 25 use LEDs, lamps, neon tubes, etc., and are turned on / off by a command of the control unit 21 based on the detection value of the turning position detection device 20, and turned on by a command from the control unit 21. Sometimes the light emitting devices 22 to 25
Lights up or flashes.

As shown in FIGS. 4 (a) and 4 (b), when the upper revolving structure 14 is in the forward-facing region, the light-emitting devices 22 and 24 on the left and right front sides are moved to the front, as shown in FIG. Is turned off to turn off both lights, and the outputs to the left and right rear light emitting devices 23 and 25 are turned on to turn on or blink both. Therefore, the operator knows that the left and right traveling motors 15 and 16 are behind the upper swing body 14, and can recognize that the operation directions of the operation levers 18 and 19 and the traveling direction of the machine body match.

On the other hand, as shown in FIGS. 6A and 6B, when the upper swing body 14 is in the rearward facing region,
As shown in FIG. 7, the outputs to the left and right front light emitting devices 22 and 24 are turned on to turn on or blink both, and the outputs to the left and right rear light emitting devices 23 and 25 are turned off to turn off both. . Therefore, the operator knows that the left and right traveling motors 15 and 16 are in front of the upper swing body 14, and can recognize that the operating directions of the operating levers 18 and 19 and the traveling direction of the machine body are opposite to each other.

On the other hand, as shown in FIG.
Is in the leftward area, as shown in FIG. 9, the outputs to the front and rear left and right light emitting devices 22 and 23 are turned on and both are turned on or blinked, and the outputs to the front and rear right side light emitting devices 24 and 25 are set. Turn off and turn off both. Therefore, the operator finds that the traveling motors 15 and 16 are located on the left side of the upper swing body 14, and the operating lever 1
By tilting 8 and 19 forward, it can be recognized that the aircraft is moving to the right.

Further, as shown in FIG. 10, the upper swing body 1
When 4 is in the rightward area, as shown in FIG. 11, the outputs to the front and rear left and right light emitting devices 22 and 23 are turned off to turn off both, and the front and rear right light emitting devices 24 and 25 are also turned off.
Turn on the output to and both will light up or blink. Therefore, the operator knows that the traveling motors 15 and 16 are located on the right side of the upper swing body 14, and can recognize that the machine body moves to the left if the operation levers 18 and 19 are tilted forward.

In each of the above areas, the light emitting devices 22 to 25 are provided.
Instead of turning off, the display color may be changed. Further, by turning on the light emitting device green or blue in the frontward region and turning on the light emitting device red in the rearward region,
It may be possible to inform whether the operation lever is normally operated or reversely operated.

Therefore, the present invention can be variously modified without departing from the spirit of the present invention, and it is obvious that the present invention extends to the modified one.

[0018]

As described in detail in the above one embodiment, the present invention provides the upper swing body which is determined by the swing position detecting device by providing the knobs of the two operating levers with two light emitting devices each in the front and rear direction. The light emitting device is turned on / off corresponding to the area. Therefore, the operator can easily and quickly recognize the traveling direction of the machine only by visually recognizing the light emitting device, which contributes to the improvement of safety.

[Brief description of drawings]

FIG. 1 is a plan view of a hydraulic excavator showing an embodiment of the present invention.

FIG. 2 is a block diagram of a control system.

FIG. 3 is a perspective view of a main part of an operation lever.

4 (a) and 4 (b) are plan views showing a state in which an upper swing body is located in a frontward region.

FIG. 5 is an explanatory diagram showing an on / off state of the light emitting device in a front facing region.

6 (a) and 6 (b) are plan views showing a state in which the upper swing body is located in the rearward facing region.

FIG. 7 is an explanatory diagram showing an on / off state of the light emitting device in a rearward facing region.

FIG. 8 is a plan view of a state in which the upper swing body is located in the leftward area.

FIG. 9 is an explanatory diagram showing an on / off state of the light emitting device in the leftward area.

FIG. 10 is a plan view of a state in which the upper swing body is located in the rightward area.

FIG. 11 is an explanatory diagram showing an on / off state of the light emitting device in the rightward area.

[Explanation of symbols]

 11 hydraulic excavator 12 lower traveling structure 14 upper revolving structure 15, 16 traveling motor 17 driver's seat 18, 19 operating lever 20 turning position detection device 21 control unit 22, 23 light emitting device 24, 25 light emitting device frontward region rearward region leftward region rightward region

Claims (1)

[Claims] 1. A construction machine in which an upper revolving structure is mounted on a lower traveling structure so as to be rotatable in all directions, and left and right traveling motors are drive-controlled by two operation levers provided in a driver's seat. The knobs of the two operating levers to the front and back respectively.
Each of the light emitting devices is provided, and a device for detecting the turning position of the upper revolving structure with respect to the lower traveling structure is provided. The construction machine is characterized in that a control unit is provided for turning on and off the light emitting device differently for each area in order to determine whether the light emitting device is located in the area of the upper swing body and display the position of the traveling motor corresponding to the area of the upper swing body. Turning position display device.