JP2742227B2 - Travel direction display device for all-turn construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling direction display device for a full swing construction machine, and more particularly to a traveling direction of a full swing construction machine in which a pair of left and right operation levers drives and controls left and right traveling motors. The present invention relates to a display device.

[0002]

2. Description of the Related Art In a conventional construction machine of this type, a left and right traveling motor is mounted on a lower traveling body, and the left and right traveling motors are driven and controlled by two operation levers provided in a cabin. In addition, the upper revolving unit can freely swing in all directions in the horizontal direction with respect to the lower traveling unit. When the upper revolving unit is being turned and the work is being performed, the operator can determine in which direction the front part of the lower traveling unit is located. It is difficult to determine whether you are. Therefore, when moving the construction machine, the operator visually recognizes the direction of the lower traveling body from the cabin and confirms the direction in which the body advances.

On the other hand, a sensor for detecting a relative position between the lower traveling structure and the upper revolving superstructure is provided, a traveling direction of the lower traveling structure is determined based on a detection value of the sensor, and the traveling direction is displayed on a traveling lever. A device for notifying an operator is also known (JP-A-5-65726).

[0004]

Conventionally, as described above, the direction of the undercarriage is confirmed visually by the operator, but depending on the machine, the orientation of the undercarriage when viewed from the cabin is difficult to understand. There is a risk of accidents caused by accidental driving.

[0005] Further, in the device described in the above publication, the display is complicated, so that it is difficult for the operator to confirm the traveling direction, and when an immediate decision is made to avoid danger, the operation may be erroneously performed and an accident may occur. .

Therefore, there is a technical problem to be solved in order to enable the operator to recognize the traveling direction of the lower traveling body in the cabin reliably, simply and quickly, and to prevent an accident due to an erroneous operation of the operation lever. The present invention aims to solve this problem.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed to achieve the above object. An upper revolving unit is mounted on a lower traveling unit having left and right crawlers so as to be capable of revolving horizontally in all directions. The drive control of the left and right traveling motors is performed by a pair of left and right operation levers provided in the cabin, and the upper revolving structure is positioned in any one of a forward facing region, a backward facing region, a left facing region, and a right facing region with respect to the lower traveling structure. In the all-swing construction machine provided with the turning position detecting device for determining whether or not the operation is performed, one light emitting unit is provided for each of the knobs of the pair of left and right operation levers, and the light emitting unit is one of two colors. It is formed so as to be lit or blinkable in one color, and when the upper revolving unit is in the forward region, the left and right light emitting units are simultaneously lit or blinked in one color, and when the upper revolving unit is in the rearward region. Left and right light emitting parts When the upper revolving unit is in the leftward area, the right light emitting unit is turned on or blinking in any one color when the upper revolving unit is in the leftward area. An object of the present invention is to provide a traveling direction display device for an all-turn construction machine in which a left light emitting portion is lit or blinked in any one color.

[0008]

When the upper revolving structure turns, the turning position of the upper revolving structure is detected by the turning position detecting device, and the upper revolving structure is positioned in any one of the forward, rearward, leftward, and rightward regions. Is determined. And
Light emitting units provided respectively on the knobs of the pair of left and right operation levers are turned on and off differently for each area, corresponding to the area of the upper revolving superstructure.

When the upper revolving unit is in the forward region, the left and right light emitting units are simultaneously turned on or off in one color, and when the upper revolving unit is in the rearward region, the left and right light emitting units are switched to the other one color. Lights or blinks simultaneously. When the upper revolving unit is in the left-facing region, the right light emitting unit is lit or blinking in one color, and when the upper revolving unit is in the right-facing region, the left light emitting unit is lit in one color. Alternatively, by blinking, the operator is made to recognize in which area the upper-part turning body is located.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a hydraulic excavator 11 as an example of a full-rotation type construction machine. A lower traveling unit 12 having left and right crawlers is connected to an upper revolving unit 1 via a ball race 13.
4 is mounted so as to be pivotable in all horizontal directions. Left and right traveling motors 15 and 16 are mounted on the left and right rear portions of the lower traveling body 12, and a hydraulic circuit is controlled by a pair of left and right operation levers 18 and 19 provided in a cabin 17, and the left and right traveling motors 15 and 16 are controlled. Are driven independently. Also,
A rotary joint 20 is provided at the center of the ball race 13, and the lower traveling body 1 is connected via the rotary joint 20.
2 and the hydraulic circuit of the upper swing body 14 are connected.

Further, the rotary joint 20 is provided with a turning position detecting device 21 such as a potentiometer or a micro switch.
2 and the relative position of the upper swing body 14 are detected. The range of the lower traveling body 12 with respect to the forward direction F is a forward facing area, the range of the rearward facing area is a left facing area,
Is set as a rightward area, and the turning position detecting device 2
Based on the detection value of 1, the control unit 22 determines in which area the center line C of the boom of the upper swing body 14 is located.

As shown in FIGS. 2 and 3, on the surfaces of the knobs 18a, 19a of the two left and right operation levers 18, 19, one light emitting portion 23, 24 is provided, respectively. The light emitting units 23 and 24 can emit two different colors by using LEDs, lamps, neon tubes, and the like.
In the present embodiment, the light emitting portions 23 and 24 are formed so as to emit two colors of red and green, and the turning position detecting device 21 is provided.
ON / OFF by a command of the control unit 22 based on the detection value of
When turned on by a command from the control unit 22,
The light emitting units 23 and 24 are lit or blinked in one of red or green.

As shown in FIGS. 4A and 4B, when the upper swing body 14 is in the forward facing area,
As shown in FIG. 5, the outputs to the left and right light emitting units 23 and 24 are turned on, and both light up green. Accordingly, the operator can recognize that the operation direction of the operation levers 18 and 19 and the traveling direction of the machine match.

On the other hand, as shown in FIGS. 6A and 6B, when the upper swing body 14 is in the rearward facing area, as shown in FIG. Turn on the output and light both in red. Therefore,
The operator can recognize that the operation direction of the operation levers 18 and 19 is exactly opposite to the traveling direction of the aircraft.

On the other hand, as shown in FIG.
Is in the left-facing area, as shown in FIG. 9, the output to the right light-emitting unit 24 is turned on, and only the light-emitting unit 24 blinks in red. Therefore, the operator knows that the front part of the lower traveling body 12 is located on the right side, and can recognize that the aircraft advances to the right by tilting the operation levers 18 and 19 forward.

Also, as shown in FIG.
When 4 is in the rightward region, as shown in FIG.
The output to the left light emitting unit 23 is turned on, and only the light emitting unit 23 blinks in red. Therefore, the operator knows that the front part of the lower traveling body 12 is located on the left side, and can recognize that the aircraft advances to the left by tilting the operation levers 18 and 19 forward.

In this embodiment, the light emitting unit 2 is used.
3, 3 and 24 are formed so as to be able to emit two colors of red and green, but may be a combination of other two colors. You may do it.

Thus, the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified ones.

[0019]

According to the present invention, as described in detail in the above embodiment, one light emitting portion is provided on each of the knobs of the pair of left and right operation levers, and the light emitting portion is provided in the area of the upper revolving body determined by the turning position detecting device. In response, the light emitting unit is turned on and off. Then, the left and right light emitting portions are simultaneously lit or blinked in one color different from each other in the forward region and the backward region, and only one different light emitting portion is lit or blinked in the left region and the right region, respectively.

Therefore, the operator can easily and quickly recognize the traveling direction of the machine simply by visually recognizing the light-emitting portion, thereby preventing erroneous operation of the operation lever and contributing to improvement of safety.

[Brief description of the drawings]

FIG. 1 is a plan view showing a hydraulic excavator according to 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.

FIGS. 4A and 4B are plan views showing a state in which the upper swing body is located in a forward facing area.

FIG. 5 is an explanatory diagram showing a lighting state of a light emitting unit in a forward facing area.

FIGS. 6A and 6B are plan views showing a state in which the upper swing body is located in a rearward facing area.

FIG. 7 is an explanatory diagram showing a lighting state of a light emitting unit in a backward area.

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

FIG. 9 is an explanatory diagram showing a blinking state of a light emitting unit in a leftward facing area.

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

FIG. 11 is an explanatory diagram showing a blinking state of a light emitting unit in a rightward region.

[Explanation of symbols]

 Reference Signs List 11 hydraulic excavator 12 lower traveling body 14 upper revolving body 15, 16 traveling motor 17 cabin 18, 19 operating lever 18a, 19a knob 21 turning position detecting device 22 control unit 23, 24 light emitting unit forward region rearward region leftward region rightward region

Claims (1)

(57) [Claims] An upper revolving body is mounted on a lower traveling body provided with left and right crawlers so as to be capable of revolving horizontally in all directions, and a pair of left and right operation levers provided in a cabin are used to drive and control the left and right traveling motors. An all-turn construction machine including a turning position detection device that determines whether an upper revolving structure is positioned in a forward facing region, a backward facing region, a left facing region, or a right facing region with respect to a lower traveling structure. One light emitting portion is provided for each of the knobs of the pair of left and right operation levers, and the light emitting portion is formed so as to be lit or blinked in any one of two colors, and the upper revolving body is in the forward facing region. When the upper and lower revolving superstructure is in the rearward area, the left and right light emitters are simultaneously turned on or blinked in the other one color, and the left and right light emitters are simultaneously turned on or blinked in one color.
When the upper revolving superstructure is in the left-facing region, the right light emitting unit is lit or blinking in one color, and when the upper revolving superstructure is in the right-facing region, the left light emitting unit is lit or blinking in one color. A traveling direction display device for an all-turn type construction machine, wherein the traveling direction display device is formed so as to be driven.