JPH11268582A - Lighting system for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To illuminate in an advancing direction during running both forward and rearward regardless of the revolving position of an upper revolving structure. SOLUTION: A front working lamp 40 to illuminate the front working region of an upper revolving structure 21 is attached to a side face of a boom 22, and a rear working lamp 41 to illuminate the rear of the upper revolving structure 21 is arranged on the rear upper surface of the upper revolving structure 21. In a controller, the backward start of a lower running body 20 is detected with an operation switch brought into an ON-state and by a sensor. When it is detected by the sensor that the upper revolving structure 21 is in a set angle range, a lighting command signal to light the rear working lamp 41 is outputted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for a construction machine, and more particularly to a lighting device provided in a swing type construction machine having a lower traveling body and an upper rotating body such as a hydraulic shovel.

[0002]

2. Description of the Related Art A typical example of a construction machine is a hydraulic excavator used for operations such as excavation. The hydraulic excavator includes a lower traveling structure, an upper revolving structure rotatably mounted on the lower traveling structure, and a boom, an arm, and a bucket attached to a front portion of the upper revolving structure and rotatable in a vertical direction. And a front working machine including such a front working member. Such a work with a hydraulic excavator is performed not only during the daytime but also at night, and particularly in the case of work such as road repair in an urban area, it is often performed at night when traffic is low. Since it is necessary to illuminate the work area in such a nighttime work site, a hydraulic shovel is generally provided with a lighting device.

As a conventional lighting device for construction machines, for example, as described in Japanese Patent Application Laid-Open No. Hei 7-304385, a lighting device provided with a work light on the side of the center of a boom is generally used. Is performed, the work light is turned on to illuminate the work area in front of the upper revolving superstructure.

[0004]

When working at night with a hydraulic excavator equipped with the above-described lighting device, when excavating earth and sand by driving the front work machine,
As described above, the work light installed on the boom is turned on to illuminate the work area in front of the upper swing body, and work such as excavation is performed. Also, when the hydraulic excavator travels forward, the vehicle travels with the work light turned on.

[0005] However, when changing the excavation position in the excavation work at the work site, the hydraulic excavator is often once moved backward. At this time, usually, the upper revolving superstructure is caused to run backward with the front facing. When performing such rearward traveling, the front working machine provided with the working lights is directed to the front, so that the rear of the hydraulic shovel cannot be illuminated. Guidance was required, which was inconvenient.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting device for a construction machine which can illuminate the traveling direction both forward and backward irrespective of the turning position of an upper turning body.

[0007]

(1) In order to achieve the above object, the present invention is provided in a construction machine having a lower traveling structure and an upper revolving structure, and illuminates a work area in front of the upper revolving structure. In a lighting device for a construction machine having a first work light, a second work light installed so as to be able to illuminate at least the rear of the upper revolving structure, and a predetermined turning angle range including the front position of the upper revolving structure. Lighting control means for turning on the second work light when the lower traveling body travels rearward.

In the present invention configured as described above,
When the lower traveling body travels backward within a predetermined swing angle range including the front position, the illumination control means causes the second traveling body to move backward.
The work light is turned on, the rear of the construction machine is illuminated, and by using the work light together with the first work light, the traveling direction can be illuminated during both forward and rearward traveling regardless of the turning position of the upper revolving structure. .

(2) In the above (1), preferably,
The lighting control unit includes a first detection unit that detects a rearward start of the lower traveling unit, a second detection unit that detects a turning position of the upper revolving unit, and a rearward start of the lower traveling unit by the first detection unit. And a controller for turning on the second work light when the second detecting means detects that the upper revolving structure is within a predetermined turning angle range including the front position.

Accordingly, when the lower traveling body travels backward within a predetermined swing angle range including the front position, the second work light is automatically turned on.

(3) In the above (1), preferably, the apparatus further comprises switch means for turning on the first work lamp, and the illumination control means includes a switch which is turned on.
The second work light is turned on when the lower traveling body travels backward within a predetermined turning angle range including the front position of the upper revolving body.

Thus, the second work light can be turned on only when the switch means is turned on to turn on the first work light.

(4) In the above (1), for example, the second working light is attached to a rear portion of the upper revolving unit.

(5) In the above (1), the second work light may be installed at a position where the rear of the upper swing body around the construction machine can be illuminated.

(6) In the above (5), preferably,
The lighting control unit includes a communication unit that wirelessly sends a signal to the second work lamp.

Accordingly, when the second work light is installed around the construction machine, a signal can be transmitted in the simplest form.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. A first embodiment of the present invention will be described with reference to FIGS. The lighting device according to the present embodiment is provided in a hydraulic shovel. As shown in FIG. 1, the hydraulic shovel includes a lower traveling body 20 and an upper revolving body 21 rotatably mounted on the lower traveling body 20. A multi-joint type front working machine 25 which is attached to a front portion of the upper revolving unit 21 and comprises a boom 22, an arm 23, and a bucket 24 which can rotate in a vertical direction, respectively, A front work light 40 for illuminating a work area in front of the upper revolving superstructure 21; and a rear work light 41 installed on a rear upper surface of the upper revolving superstructure 21 for illuminating the rear of the upper revolving superstructure 21.
And The front working light 40 is tiltably attached to an L-shaped mounting plate 40a fixed to the side surface of the boom 22, and the rear working light 41 is fixed to a flat mounting plate 41a fixed to the rear upper surface of the upper swing body 21. Mounted so that it can be tilted.

The hydraulic excavator also includes, as actuators of a hydraulic drive system, a travel motor 26 for traveling the lower traveling body 20, a swing motor (not shown) for swinging the upper swing body 21, a boom 22, an arm 23, Bucket 2
Boom cylinder 2 for rotating each of the four in the vertical direction
7, an arm cylinder 28, and a bucket cylinder 29.

FIG. 2 shows a hydraulic drive system of the undercarriage 20 and an illumination control device related to the front work light 40 and the rear work light 41. The hydraulic drive system of the lower traveling unit 20 includes the upper revolving unit 2
1, a main pump 2 driven by the prime mover 1 and supplying hydraulic oil to a traveling motor 26;
And a control valve 3 for controlling the direction of pressure oil supplied from the main pump 2 to the traveling motor 26. Here, the control valve 3 is connected to the upper revolving superstructure 21.
And the traveling motor 26 is provided on the lower traveling unit 20, so that the pipe 9 a connected to the control valve 3 and the traveling motor 26 are connected between the upper revolving unit 21 and the lower traveling unit 20. A rotary joint 7 that communicates with the pipe 9b is provided so that pressure oil can be sent from the control valve 3 to the traveling motor 26.

The hydraulic drive system of the lower traveling unit 20 includes a pilot pump 4 that is driven integrally with the main pump 2.
A pilot relief valve 5 for limiting the maximum discharge pressure of the pilot pump 4, an operating lever 8 for traveling,
And a pilot valve 6 for generating a pilot pressure corresponding to the operation amount of the operation lever 8 to control the control valve 3. Here, the operating lever 8 is operated in the direction A when the hydraulic shovel is driven forward, and is operated in the direction B when the hydraulic shovel is driven backward.

The lighting control device relating to the front work light 40 and the rear work light 41 includes a battery 30, an operation switch 43 for turning on the front work light 40, and an operation switch 4
3, a switching relay 44 that conducts when the switch 3 is turned on to turn on the front work lamp 40, a sensor 32 that detects the backward start of the hydraulic shovel by detecting that the operation lever 8 is operated to the side B in the figure, and a rotation. A sensor 33 provided at the joint 7 for detecting a turning position (turning angle) of the upper turning body 21
And the operation signal of the operation switch 43 and the sensors 32 and 33
The detection signal is input to the rear work light 4
And a controller 31 for turning on 1.

The rear working light 4 by the controller 31
FIG. 3 shows details of the lighting control processing function No. 1. First, an operation signal of the operation switch 43 and a detection signal of the sensors 32 and 33 are input (step 101).
It is determined whether the operation signal is ON (step 10).
2) If it is ON, it is determined from the detection signal of the sensor 32 whether the excavator starts backward (step 10).
3) If not, a turn-off command signal for turning off the rear work light 41 is output (step 106).

When it is determined whether the hydraulic shovel is starting backward, if the starting is backward, it is determined from the detection signal of the sensor 33 whether or not the turning angle θ of the upper turning body 21 is within the range of the set angle θ ₀ (step 104). If not, a turn-off command signal for turning off the rear work light 41 is output (step 106). Here, as shown in FIG. 4, the set angle θ ₀ is set to 90 degrees in both the left and right directions from the state where the upper swing body 21 is at the front position.

The turning angle θ of the upper turning body 21 is equal to the set angle θ.
When determining whether the ₀ range, unless the set angle theta range ₀ outputs a lighting command signal for lighting the rear working light 41 (step 105), the rear working light 4 otherwise
A turn-off command signal for turning off the LED 1 is output (step 10).
6).

In this embodiment constructed as described above, when excavation work or the like is performed at night, the operator first turns on the operation switch 43 to turn on the front work lamp 40 and turn on the upper revolving unit 21. Illuminate the work area in front. When the hydraulic excavator travels forward, the operation lever 8 is operated to the A side in FIG. At this time, the front work light 40 illuminates the front of the excavator, that is, the traveling direction (FIG. 5).

Thereafter, when the excavator is to be driven rearward while the upper swing body 21 faces the front for the reason of changing the excavation position, the operator operates the operation lever 8 to the side B in FIG. At this time, since the upper revolving superstructure 21 faces the front and is within the range of the set angle θ ₀ , a lighting command signal is output from the controller 31, the rear work light 41 is automatically turned on, and the rear of the hydraulic shovel, that is, The direction is illuminated (FIG. 6).

As described above, in the present embodiment, if the vehicle 1 travels backward with the upper revolving unit 21 facing the front while the front work lamp 40 is on, the rear work lamp 41 is automatically turned on. Since the rear of the hydraulic excavator is illuminated, the upper working body 2
Regardless of the turning position, the traveling direction can be illuminated both when traveling forward and when traveling backward.

A second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment in that the rear work light is installed around the hydraulic excavator instead of being installed at the rear of the upper swing body. In the figure,
Members that are the same as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

In FIGS. 7 and 8, the lighting device of this embodiment is different from the rear working lamp 41 of the first embodiment in that:
It has a rear working light 41A with a stand installed so as to be able to illuminate the rear of the upper swing body 21 around the hydraulic excavator. Further, the lighting device of the present embodiment has a transmitter 34, a receiver 35, a battery 36, and a control panel 37 in addition to those of the first embodiment. The transmitter 34 wirelessly transmits a lighting command signal from the controller 31, and the receiver 35 receives the lighting command signal transmitted from the transmitter 34. The control panel 37 sends the lighting command signal received by the receiver 35 to the rear work lamp 41A to turn on the rear work lamp 41A.

After the operation switch 43 is turned on to turn on the front work lamp 40, when the operation lever 8 is operated to the B side while the upper revolving superstructure 21 is facing the front to run backward, the controller 31 turns on. A command signal is output, and the lighting command signal is wirelessly transmitted from the transmitter 34, and the transmitted signal is received by the receiver 35 and transmitted to the rear work lamp 41A via the control panel 37. The rear work light 4
1A is turned on, and the rear of the excavator, that is, the traveling direction is illuminated.

Therefore, in the present embodiment, as in the first embodiment, the traveling direction can be illuminated both when traveling forward and when traveling backward, regardless of the turning position of the upper swing body 21.

When the rear working light 41A is installed around a hydraulic excavator, a signal can be sent in the simplest form.

In this embodiment, the controller 31
, The wireless signal is transmitted to the rear work light 41A, but it is also possible to connect the controller 31 and the rear work light 41A with a communication cable and transmit the signal by wire.

[0034]

According to the present invention, the traveling direction can be illuminated during both forward and backward running, regardless of the turning position of the upper turning body.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic shovel equipped with a lighting device according to a first embodiment of the present invention.

FIG. 2 is a hydraulic drive system of a lower traveling body mounted on the hydraulic excavator shown in FIG. 1 and a lighting control device of a lighting device.

FIG. 3 is a flowchart showing details of a lighting control process of a controller shown in FIG. 1;

FIG. 4 is a view showing a set angle of an upper-part turning body used in the illumination control processing shown in FIG. 3;

FIG. 5 is an operation explanatory diagram when the hydraulic shovel shown in FIG. 1 travels forward.

FIG. 6 is an operation explanatory diagram when the hydraulic shovel shown in FIG. 1 runs backward.

FIG. 7 is a diagram showing an illumination range of a rear working light of a lighting device according to a second embodiment of the present invention.

8 is a hydraulic drive device for a lower traveling body and an illumination control device for a lighting device mounted on the hydraulic excavator shown in FIG. 7;

[Explanation of symbols]

 Reference Signs List 20 lower traveling body 21 upper revolving superstructure 30 battery 31 controller 32 sensor (first detecting means) 33 sensor (second detecting means) 34 transmitter (communication means) 35 receiver (communication means) 36 battery 37 control panel (communication means) ) 40 front work light (first work light) 41 rear work light (second work light) 41A rear work light (second work light) 43 operation switch 44 switching relay

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasushi Fukushima 2-13-1, Aise-cho, Hitachi City, Ibaraki Pref.

Claims (6)

[Claims] 1. A lighting device for a construction machine having a first work light provided on a construction machine having a lower traveling structure and an upper revolving structure and illuminating a work area in front of the upper revolving structure, wherein at least one of the upper revolving structure is provided. A second work light installed so as to be able to illuminate the rear, and an illumination for illuminating the second work light when the lower traveling body travels rearward within a predetermined turning angle range including the front position of the upper revolving superstructure. A lighting device for a construction machine, comprising: a control unit. 2. The illumination device for a construction machine according to claim 1, wherein said illumination control means includes a first detection means for detecting a rearward start of said lower traveling body, and a lighting means for detecting a turning position of said upper revolving body. (2) when the backward detection of the lower traveling body is detected by the first detecting means and the first detecting means, and when the upper revolving body is detected to be within a predetermined turning angle range including the front position by the second detecting means. And a controller for turning on the second work light. 3. The lighting device for a construction machine according to claim 1, further comprising: switch means for turning on said first work lamp, wherein said lighting control means includes:
The lighting device for a construction machine, wherein the second work light is turned on when the lower traveling body runs backward within a predetermined turning angle range including the front position of the upper revolving body. 4. A lighting device for a construction machine according to claim 1, wherein said second work light is mounted on a rear portion of said upper swing body. 5. The construction machine lighting device according to claim 1, wherein the second work light is installed at a position where the rear of the upper swing body around the construction machine can be illuminated. Lighting equipment. 6. A lighting device for a construction machine according to claim 5, wherein said lighting control means has a communication means for wirelessly transmitting a signal to said second work light.