JPH0571043U - Work light equipment for construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] A side light is provided on the upper revolving structure to prove the side view of the hydraulic excavator. Lights up,
Only turn off the side lights when not turning to ensure safety and save energy. [Structure] The upper swing structure of the construction machine is provided with a side light for illuminating its side view, and a detection switch is provided on the electric path leading to the side light, and the detection switch detects the operation signal of the turning operation lever. At that time, the circuit is energized, and the side lights are ignited when the upper revolving structure is swung when the headlight is illuminated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work light device mounted on an upper turning construction machine, a work vehicle, and the like.

[0002]

[Prior Art]

 FIG. 3 is a partially cutaway side view of a conventional hydraulic excavator. In the figure, 1 is a lower traveling body of a hydraulic excavator, 2 is an upper swing body, 3 is a swing motor, 4 is a driver's seat, 5 is an operation lever, 6 is a headlight, and 7 is a front portion of the upper swing body 2. This is a work attachment. In the hydraulic excavator, an upper revolving structure 2 is rotatably provided above the lower traveling structure 1, and a headlight 6 is mounted on the upper revolving structure 2.

Since a hydraulic excavator moves a work attachment 7 mounted on the front part to perform excavation work, a headlamp 6 (not shown, which is attached to the work attachment 7 or the like) illuminates the front during nighttime work. Work lights for front lighting are included). Therefore, even if the driver tried to make a turn while checking the safety when turning, it was dangerous because the side view of the hydraulic excavator was dark and difficult to see. In addition, if a work light for side lighting is provided to address the above-mentioned problems, it lights up even when the hydraulic excavator does not turn, and it consumes a large amount of power, which is a problem. Even if a switch for flashing the work light is installed, it was a problem that the driver could not do because of the trouble of the flashing operation.

[0004]

[Problems to be solved by the device]

 The problem to be solved is that there is no need for lighting to brighten the side view when the upper revolving structure is not turned during nighttime operation of the hydraulic shovel, but even if the driver tries to turn while confirming safety while turning. The side view of a hydraulic excavator is dark and difficult to see, which is dangerous.

[0005]

[Means for Solving the Problems]

 According to the present invention, the upper swing body is provided with a side light for illuminating its side view, and a detection switch is provided in the electric path leading to the side light, and the detection switch detects the operation signal of the turning operation lever. At that time, the circuit is energized, and the side lights are turned on when the upper revolving structure is turned when the headlight is illuminated.

[0006]

【Example】

 FIG. 1 is a circuit diagram of a work light device of the present invention. In the figure, 8 is a turning remote control valve for a hydraulic excavator, 9L and 9R are pilot valves for the turning remote control valve 8, 5'is a turning control lever, 10 is a pilot pressure hydraulic source, 11 is an oil tank, 6 ', 6'is the left and right headlights, 12L and 12R are the left and right side lights, and 13L and 13R are pressure switches as detection switches which operate by detecting the pilot pressure derived from the turning remote control valve 8, and 14 , 15 and 16 are relays, 17 is a work light switch, 18 is a power source, and symbols a and b are pilot conduits connected to a pilot pressure receiving portion of a swing motor control pilot switching valve (not shown). FIG. 2 is a side view of essential parts showing a hydraulic excavator having a side light 12L (12R is not shown). In the figure, reference numeral 2'denotes an upper revolving structure equipped with the work light device of the present invention. The side lights 12L and 12R are not limited to specific positions of the upper revolving structure 2 ', but can be installed by setting desired optimum positions.

Next, the construction of the work light device of the present invention will be described with reference to FIG. The upper swing body 2'is provided with side lights 12L and 12R for illuminating its side field of view, and pressure switches 13L and 13R are provided in the electric paths leading to the side lights 12L and 12R, respectively. When the pressure switch 13L or 13R is activated by the pilot pressure derived from the remote control valve 8 during the operation of ', the circuit is energized, and the upper revolving structure 2'is swung when the headlight 6'is illuminated. At this time, the side lights 12L or 12R are configured to be turned on.

Next, the operation of the work light device of the present invention will be described. When the hydraulic excavator performs night work, the work light switch 17 is closed. Since the relay 14 performs relay operation, the headlight 6'lights up. In this case, since the turning operation lever 5'is in the neutral position, the pilot valves 9L and 9R of the remote control valve 8 are both in the tank communication oil passage position. Since the pilot pressure from the pilot pressure hydraulic power source 10 is not introduced from the pilot valves 9L and 9R, both the pressure switches 13L and 13R are in the off position. Therefore, even if the headlight 6'is turned on, the side lights 12L and 12R are not turned on when the upper-part turning body 2'is not turning. Next, with the headlight 6'lighted, the operation lever 5'is operated in the c position direction. Since the pilot valve 9L is switched, the pilot pressure from the pilot pressure hydraulic pressure source 10 passes through the pilot valve 9L, and one of them is supplied to the pilot pressure receiving portion of the turning pilot switching valve (not shown) through the pilot line a. And the other acts on the pressure switch 13L by branching in the conduit of the pilot valve 9L outlet. Since the pressure switch 13L is turned on, the relay 15 is also relayed and the side lamp 12L is turned on. Therefore, when the hydraulic excavator starts to turn left, the side lamp 12L illuminates the left side view of the hydraulic excavator. The driver can confirm the safety by visually observing the illuminated left side. Next, the operating lever 5'is operated in the two-position direction with the headlight 6'lighted. Since the pilot valve 9R is switched, the pilot pressure from the pilot pressure hydraulic power source 10 passes through the pilot valve 9R, one of which acts on the pilot pressure receiving portion of the turning pilot switching valve through the pilot pipe B, and the other of which Acts on the pressure switch 13R by diverging at the outlet of the pilot valve 9R. Since the pressure switch 13R is turned on, the relay 16 is also turned on and the side lamp 12R is turned on. Therefore, when the hydraulic excavator starts to turn right, the side light 12R illuminates the right side field of view of the hydraulic excavator. The driver can check the safety by looking at the illuminated right side.

In the embodiment of FIG. 1 of the present invention, the pressure switches 13L and 13R are arranged as detection switches so that they are turned on by the pilot pressure derived from the remote control valve 8. However, the limit switches are used as detection switches. (Not shown) or the like may be arranged so that a mechanical force is applied to the operation signal of the turning operation lever to actuate the limit switch and the like. Further, the working light device of the present invention can be applied to a device using the turning pedal instead of the turning operation lever.

[0010]

[Effect of the device]

 As described above, in the present invention, the upper swing body of the hydraulic excavator is provided with the side light for illuminating its side view, and the detection switch is provided in the electric path leading to the side light, and the detection switch is used for the turning operation. When a lever operation signal is detected, the circuit is energized, and the side lights are turned on when the upper revolving structure is turned when the headlight is illuminated. As a result, when the turning operation lever is operated with the headlight turned on, the detection switch is turned on, and the side lamp in the turning direction is turned on. That is, when the hydraulic shovel starts to turn, the side lights illuminate the side view of the hydraulic shovel in the turning direction. The driver can visually check the illuminated side to confirm safety. Further, when the hydraulic excavator stops turning, the headlights are still on, but the side lights are off, so that an energy saving effect can be exhibited.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a work light device of the present invention.

FIG. 2 is a side view of an essential part of a hydraulic excavator having a side light according to the present invention.

FIG. 3 is a partially cutaway side view of a conventional hydraulic excavator.

[Explanation of symbols]

 1 Lower traveling body 2,2 'Upper revolving structure 5,5' Operating lever 6,6 'Headlight 8 Revolving remote control valve 12,12R Side light 13L, 13R Pressure switch 14,15,16 Relay 17 Work light switch

Claims (1)

[Scope of utility model registration request] 1. A construction machine in which an upper revolving structure is rotatably provided on an upper part of a lower traveling structure, and the upper revolving structure is equipped with a headlight, in which the upper revolving structure illuminates a side view thereof. A lamp is provided, and a detection switch is provided in the electric path leading to the side light, and when the detection switch detects the operation signal of the turning operation lever, the circuit is energized. A work light device for a construction machine, characterized in that a side light is turned on when turning.