JPH04115030A - Cabin interior lighting system for industrial machinery - Google Patents

Abstract

PURPOSE:To eliminate the necessity of switching manipulation for a change-over switch and to ensure a safety by providing a cut-off means for cutting off the connection between a door switch and a power source after a predetermined time elapses from the time when the door switch is turned on. CONSTITUTION:A cut-off means such as a timer device 8 or the like is connected between a door switch 7 connected to a first position 5a of a change-over switch 5 in an illuminating section 4 in a cabin, and a power source 6 so that the connection between the switch 7 and the power source 6 is cut off after a predetermined time elapses from the time when the door switch 7 is turned on. Simultaneously with the turn-on of the door switch 7, the timer device 8 initiates measuring the time, and after it measures a time to be estimated as that required for the operator entering into the cabin, it cuts off the connection between the door switch 7 and the power source 6. Further, another switch which is turned on when the door is locked in an opening condition but is turned off when the door is not locked in the opening condition, may be used, in stead of the time device 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cabin interior illumination device for illuminating a cabin interior forming a driver's cab of an industrial machine such as a hydraulic excavator.

[Conventional technology]

3 to 6 are explanatory diagrams showing a conventional interior lighting system for a cabin of an industrial machine, FIG. 3 is a side view showing a hydraulic excavator as an example of an industrial machine, and FIG. 4 is an explanatory diagram showing the hydraulic excavator shown in FIG. FIG. 5 is a side view showing the cabin door of the excavator shown in the closed state; FIG. 5 is a side view showing the cabin door of the hydraulic excavator shown in FIG. 3 in the open state and locked; FIG. 6 is the lighting provided in the hydraulic excavator shown in FIG. FIG. 2 is a circuit diagram showing the configuration of the device.

Generally, an industrial machine, such as a hydraulic excavator shown in FIG. 3, is equipped with a cabin 1 forming a driver's cab. As shown in Fig. 4.5, this cabin 1 is equipped with a door 2 that can be opened and closed in the horizontal direction.

Engagement members 3a, 3 that engage with each other at a lower position on the outer surface of this door 2 and a lower position on the outer surface of the cabin 1, respectively.
#2 is locked in the open state as shown in FIG. 5 by engaging these engaging members 3a and 3b. Note that by opening the door 2, the operator can enter the cabin 1 and exit from the cabin 1 to the outside. Further, as shown in FIG. 5, the cabin 1 is equipped with a door switch 7 that is turned off when the door 2 is closed and turned on when the door 2 is opened.

A circuit shown in FIG. 6 is provided as a lighting device for illuminating the interior of the cabin 1 as described above. This lighting device consists of a lighting section 4, a power source 6, and the aforementioned door switch 7 placed between the lighting section 4 and the power source 6. The lighting section 4 illuminates the interior of the cabin 1. Lighting light 4
a and a selector switch 5. Changeover switch 5
is connected to the door switch 7 mentioned above, and #2 of cabin 1
a first position 5 in which the lighting lamp 4a is turned on when the
a, a second position 5b that turns off the illumination light 4a regardless of the opening/closing operation of the door 2, and a third position 5C that is directly connected to the power source 6 and keeps the illumination light 4a on at all times.

In such a lighting device, the changeover switch 5 is
By switching the changeover switch 5 to the second position 5c, the interior of the cabin 1 can be illuminated when the operator intends, and by switching the changeover switch 5 to the second position 5b, the light can be kept off. is maintained. When the changeover switch 5 is kept at the first position 5a in this manner and the door 2 is in the open state as shown in FIG. The state will be as follows. Also,
When the door 2 is opened, the door switch 7 is turned on, the lighting lamp is turned on, and the interior of the cabin 1 is illuminated.

[Problem to be solved by the invention]

By the way, in a hydraulic excavator equipped with such a lighting device, when the operator opens the door 2 and gets into the cabin 1 during nighttime work in summer, etc., there is a need to open the door 2 to improve ventilation inside the cabin 1. As shown in Figure 5, the door 2
is often locked in the open position. In this state, as mentioned above, the door switch 7 is turned on and the lighting lamp 4 is turned on.
A lights up, but if the interior of the cabin 1 is illuminated during nighttime work, it is difficult to see the outside from inside the cabin 1, which is dangerous. In order to turn off the light 4a, the changeover switch 5 is switched to the second position 5b. In this way, in the past, when working with the door 2 open and locked at night in the summer, etc., the changeover switch 5
This requires an operation to switch from the first position 5a to the second position 5b, which is extremely complicated.

Further, when exiting from inside the cabin 1 to the outside, the door 2 must be returned to the first position 5a and closed, but as described above, the changeover switch 5 must be moved to the second position 5a.
It is easy to forget to return to the first position 5a while switching to position 5a. With the changeover switch 5 left in the second position 5b, when the operator opens the door 2 again and attempts to get into the cabin 1, the illumination light 4a does not turn on and the operator's feet are dark. I sometimes tripped over things and got injured.

The present invention has been made in view of the above-mentioned actual situation in the prior art, and its purpose is to enable work to be carried out with the door open at night, etc., without requiring the switching operation of a changeover switch. An object of the present invention is to provide an interior lighting device for the cabin of an industrial machine that can perform the following functions.

[Means to solve the problem]

In order to achieve this object, the first aspect of the present invention provides a lighting lamp that illuminates the interior of the cabin, and a lamp that is arranged between the lighting lamp and the power source and turns on the lighting lamp when the door of the cabin is opened. In a cabin interior lighting system for an industrial machine, the switch has a first position and a second position that turns off a lighting light regardless of whether a door is opened or closed; A door switch is provided that is turned off when the door is closed and turned on when the door is opened, and a switch is provided between the door switch and the power source that connects the door switch and the power source after a predetermined period of time after the door switch is turned on. The structure is provided with a cutoff means for cutting off the light.

Further, a second aspect of the present invention provides a lighting lamp for illuminating the inside of a cabin, a first position that is arranged between the lighting lamp and a power source and turns on the lighting lamp when the door of the cabin is opened, and a door. In a cabin interior lighting system for industrial machinery, the switch has a second position that turns off the illumination light regardless of whether the door is opened or closed. The door switch is connected in series with a door switch that is turned on when the door is opened, and another switch that is turned off when the door is locked in the open state and turned on when the door is not locked in the open state.

[Effect]

Since the first aspect of the present invention is configured as described above, it is only necessary to switch the changeover switch to the first position in advance, and when the operator tries to get into the cabin at night in summer, the cabin door is closed. When the door is opened, the door switch is turned on, which turns on the light and illuminates the interior of the cabin. Thereafter, after a predetermined period of time, the connection with the power source is cut off by the cutoff means, and the illumination light is turned off. Therefore, safety during nighttime work can be ensured without changing the changeover switch to the second position.

Moreover, since the second invention of the present invention is configured as described above, it is sufficient to switch the changeover switch to the first position in advance, and when the operator gets into the cabin at night in summer, etc. When you open the door of
When both the door switch and another switch are turned on, the lighting light is turned on and the interior of the cabin is illuminated. When the door is opened and locked, another switch is turned off, cutting off the connection to the power source and turning off the lights.

Therefore, even in this second invention, safety during night work can be ensured without changing the changeover switch to the second position.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a cabin interior lighting device for industrial machinery according to the present invention will be described based on the drawings.

FIG. 1 is a circuit diagram showing an embodiment of the first invention of the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the second invention of the present invention. It is drawn in correspondence with Figure 6. Further, in either embodiment of the first invention or the second invention, for example, the cabin 1 and the door 2 provided in the hydraulic excavator shown in FIG. 3 and shown in FIG.
, engaging members 3a, 3b, and a door switch 7.

In the embodiment of the first invention shown in FIG. 1, as in the prior art shown in FIG.
The selector switch 5 has a first position 5a that turns on the illumination light 4a when the door 2 of the cabin 1 is opened, and a first position 5a that turns on the illumination light 4a regardless of whether the door 2 is opened or closed. a second position 5b for turning off the light;
A third device that is directly connected to the power source 6 and constantly turns off the illumination light 4a.
position 5C, and the first position 5C.
The door switch 7, which is turned off when the door 2 is closed and turned on when the door 2 is opened, is connected to a.

In this embodiment, a cutoff means, such as a timer device 8, is provided between the door switch 7 and the power source 6 to cut off the connection between the door switch 7 and the power source 6 a predetermined time after the door switch 7 is turned on. This timer device 8 starts measuring time as soon as the door switch 7 is turned on, and after measuring the time considered necessary for the operator to get into the cabin 1, for example, 5 to 10 seconds, the timer device 8 starts measuring time between the door switch 7 and the power source 6. cut off.

In the embodiment of the first invention configured in this way, it is sufficient to switch the changeover switch 5 to the first position 5a in advance, and when working at night in summer, etc., the hydraulic excavator waiting in such a state When the operator attempts to enter the cabin 1 by opening the door 2, the door switch 2 is turned on and the illumination light 4a is turned on. When the operator arrived at the driver's seat in the cabin 1, the timer device 8, which was activated at the same time as the door switch 2 was turned on, counted 5 to 10.
When the time in seconds is not measured, the timer device 8 shuts off the door switch 2 and the power source 6, and the illumination light 4a is turned off.

As described above, in this embodiment, when working at night in the summer, the inside of the cabin 1 is illuminated when the operator gets into the cabin 1, so that the area underfoot is bright, and injuries caused by the operator stumbling over things when getting into the cabin are prevented. . In addition, when the operator is inside the cabin 1, the lights inside the cabin 1 are turned off, ensuring safety during nighttime work, and during this time, it is necessary to switch the changeover switch 5 to the second position 5b. Therefore, the operator is not burdened with any trouble associated with the switching operation of the changeover switch 5.

In addition, although the timer device 8 for measuring time is provided as a cutoff means in the above, a configuration may be adopted in which a capacitor is provided in place of the timer device 8.

The embodiment of the second invention shown in FIG. 2 turns on when the door 2 is locked in the open state, instead of the timer device 8 in the embodiment of the first invention shown in FIG. In addition, a separate switch 9 that is turned off is provided. The other configurations are the same as the embodiment of the first invention described above.

Even in the embodiment of the second invention configured in this way, it is sufficient to switch the selector switch 5 to the first position 5a in advance. When the operator opens the door to enter the cabin 1 during nighttime work in summer, both the door switch 7 and another switch 9 are turned on, and the lighting light 4 is turned on.
a lights up, and with the door 2 open, the aforementioned engaging members 3a and 3b
When the lock is not activated, another switch 9 is turned off and the lighting lamp 4a is turned off.

Therefore, even in this embodiment of the second invention, the interior of the cabin 1 is once illuminated when the operator boards the cabin 1, so that the operator's feet are brightly lit, thereby preventing injuries to the operator when boarding the cabin, and eliminating the need for troublesome switching. It is possible to turn off the lights in the room during work without requiring a switching operation of the switch 5 to the second position 5b, and it is possible to ensure safety during work such as at night.

〔Effect of the invention〕

Since the cabin interior lighting device for industrial machinery of the present invention is configured as described above, when performing work with the door open at night, the work can be performed without the need for changing the changeover switch. This eliminates the complication associated with switching the changeover switch that was previously given to the operator, and also makes it possible for the operator to have a bright place to step into the cabin, which prevents injuries from tripping over objects. .

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the first invention of the industrial machine cabin interior lighting device of the invention, and FIG. 2 is a circuit diagram showing an embodiment of the second invention of the invention. 3 to 6 are explanatory diagrams showing a conventional interior lighting system for a cabin of an industrial machine. 5 is a side view showing the cabin door of the hydraulic excavator shown in FIG. 3 in an open state and locked; FIG. 6 is a side view showing the hydraulic excavator shown in FIG. 3 with the cabin door open and locked. FIG. 1...cabin, 2...door, 4...
...Lighting section, 4a...Lighting light, 5...
・Choice switch, 5a...1st position,
5b...Second position, 5C...
3rd position, 6...Power supply, 7...State funeral switch, 8...Timer device (cutoff means),
9...Another switch.

Claims (2)

[Claims] (1) A lighting light that illuminates the inside of the cabin, a first position that is placed between this lighting light and a power source and turns on the lighting light when the cabin door is opened, and a lighting light regardless of the opening/closing operation of the door. In the cabin interior lighting system for an industrial machine, the lighting system includes a changeover switch that has a second position that turns off the light, and a switch that is connected between the first position of the changeover switch and the power source, and that is turned off when the door is closed, and turned off when the door is opened. a door switch that is turned on when A cabin interior lighting device for industrial machinery characterized by the following: (2) A lighting lamp that illuminates the inside of the cabin, a first position that is placed between the lighting lamp and the power source and turns on the lighting lamp when the cabin door is opened, and the lighting regardless of the opening/closing operation of the door. In the cabin interior lighting system for an industrial machine, the lighting device includes a changeover switch having a second position for turning off the light, and a switch that is connected between the first position of the changeover switch and the power source, and is turned off when the door is closed, and turned off when the door is opened. A cabin interior lighting for an industrial machine, characterized in that a door switch that is turned on when the door is operated and another switch that is turned off when the door is locked in the open state and turned on when the door is not locked in the open state are connected in series. Device.