JPH0921144A - Lighting equipment in construction machinery - Google Patents

Abstract

(57) [Summary] [Purpose] When the upper revolving structure is turned, it should be possible to sufficiently illuminate the direction ahead. A lighting device is swingably provided to the left and right, an electric motor for swinging the lighting device, and a swing operation detection device for detecting a swing direction and a swing angle of an upper swing body are provided. The lighting device is configured to swing left and right in the turning direction by an angle corresponding to the turning speed.

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 having an upper swing body such as a hydraulic excavator.

[0002]

2. Description of the Related Art In general,
In this type of construction machine such as a hydraulic excavator, for example, an illumination device that illuminates the front of the driver's seat is provided at the upper part of the cab,
We are working to improve workability at night, in rain, or in dark places such as in tunnels. By the way, when the upper revolving superstructure is turned, the operator needs to look ahead of the turning direction to check the presence or absence of obstacles. In particular, in construction machines, even the work attachment, which is provided so as to project forward from the upper swing body, integrally turns, so it is necessary to turn with caution in front of the turning locus of the work attachment. There is. However, since the conventional lighting device is fixed so that it illuminates the front of the driver's seat,
It is not possible to sufficiently illuminate the turning direction ahead, and especially when the turning speed is high, the illumination cannot reach the turning direction ahead. For this reason, when the lighting device is turned on at night or the like, it is the actual situation that obstacles and the like are checked by controlling the turning speed, and there is a problem that work efficiency is poor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and was devised for the purpose of providing a lighting device for a construction machine capable of solving these problems. In a construction machine in which an upper revolving structure is rotatably supported by a traveling body, an illumination unit provided on the upper revolving unit side so as to be able to change the irradiation direction, a drive unit for changing the irradiation direction of the illumination unit to the left and the right, A turning operation detecting means for detecting the turning operation of the turning body, and for connecting the turning operation detecting means and the driving means to change the irradiation direction in response to the turning operation detection by the turning operation detecting means. And a drive command unit that outputs the drive control command of 1.

According to the present invention, when the upper revolving structure is revolved, the forward direction of the revolving structure can be sufficiently illuminated.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a hydraulic excavator, which comprises a crawler-type lower traveling body 2, an upper revolving body 3 which is rotatably supported above the lower traveling body 2,
The basic structure such as being composed of each member such as the work attachment 4 attached to the front part of the upper revolving superstructure 3 is the same as the conventional one. A cab 5 for covering is provided.

Reference numeral 6 denotes a pair of left and right lighting devices provided on the cab 5, and a support shaft 7 oriented vertically is integrally suspended from the lower end of each lighting device 6. The support shaft 7 is rotatably supported around left and right brackets 8 attached to the left and right corners of the upper front end of the cab 5, and an electric motor 9 housed in each bracket 8 is supported. Is linked to the output shaft of
As a result, the lighting device 6 is configured to swing in the left-right direction based on the forward / reverse driving of the electric motor 9 to change the irradiation direction to the left / right. Incidentally, in the present embodiment, the electric motor 9 is of a built-in speed reducer type (for example, a geared motor).

On the other hand, 11 is a turning drive device for turning the upper turning body 3, and the turning drive device 11 includes:
A turning operation detector 12 is provided to detect the turning operation direction and the turning speed. Then, the turning operation detection device 12 is configured to output a detection signal of the turning direction and the turning speed to the control unit 13 described later.

The control unit 13 is composed of a microcomputer or the like, and is used to turn on the turning operation detection device 12 and the lighting device 6 in the cockpit 5a.
A signal from a lighting switch 14 provided on the input side is input, and a control command is output to the electric motor 9 based on the input signal. That is, the swing control routine of the lighting device 6 in the control unit 13 will be described based on the flowchart shown in FIG. 4.
First, it is determined whether or not the lighting switch 14 is ON. If it is judged to be ON, then,
Based on an input signal from the turning operation detecting device 12, it is determined whether or not the upper-part turning body 3 is turning, and when it is determined that the upper turning body 3 is turning, the turning operation detection device 12 further determines The direction and the angle at which the lighting device 6 is swung are calculated based on the detected detection signals of the turning direction and the turning speed. Here, in the memory of the control unit 13, the lighting device 6 corresponding to the turning direction and the turning speed of the upper-part turning body 3 is stored.
Of the swing direction and swing angle, that is, as shown in FIG. 5, the swing direction is the same as the swing direction, and the swing angle is set to be larger as the swing speed is faster. The control unit 13 is configured to calculate the direction and angle of swinging the lighting device 6 based on this data. It should be noted that this data may be set so as to be changed stepwise as shown in FIG.
Subsequently, the control unit 13 outputs a drive control command to the electric motor 9 so that the lighting device 6 swings by the calculated direction and angle, whereby the lighting device 6 swings the upper swing body 3. It is configured to swing left and right according to the direction and the turning speed. The lighting switch 14 is off
In the case of, or when it is determined that the upper swing body 3 is not swinging, the control unit 13 outputs a drive control command to the electric motor 9 so that the lighting device 6 faces the front.

In the embodiment of the present invention constructed as described above, when the upper revolving structure 3 is revolved, the illuminating device 6 oscillates left and right in accordance with the revolving structure and illuminates the front side in the revolving direction. As a result, the operator can easily confirm the destination ahead of the turning direction, and the workability is improved.

Moreover, since the left and right swing of the lighting device 6 is set so that the swing angle becomes larger as the swing speed of the upper swing body 3 becomes faster, even if the swing angle of the upper swing body 3 becomes faster. The lighting device 6 illuminates the forward direction in the turning direction without delay, so that it is not necessary to reduce the turning speed for checking obstacles and the like unlike the conventional one in which the lighting device is fixed, and work efficiency is improved. It can contribute to improvement.

Moreover, in this embodiment, the lighting device 6 is used.
Since the swinging of is set to be performed only when the lighting switch 14 is in the ON state, it is possible to omit the waste of driving the electric motor 9 when the lighting device 6 is not lighting.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and in the embodiment, both the left and right lighting devices 6 swing by the same angle toward the turning operation direction of the upper swing body 3. Although the configuration is adopted, of the left and right illumination devices 6, the illumination device 6 on the side of the turning operation direction, that is, the right illumination device 6 in the case of a right turn is subjected to swing control along with the turning, as in the above embodiment. However, the illuminating device 6 on the side opposite to the turning operation direction (in this case, the left side) does not swing and keeps illuminating the front side or swings by an angle smaller than the swing angle of the lighting device 6 on the turning operating direction side. It can also be configured to move so that the optical axis is directed toward the tip of the work attachment 4. In such a configuration, the lighting device 6 on the side of the turning operation direction is directed toward the tip of the turning direction. While illuminating, the lighting device 6 on the other side Supposed to illuminate the distal direction of the use attachment 4, visibility of the tip direction of the working attachment 4 can be advantageously ensured. By the way,
FIG. 7 shows an example of a flowchart for implementing the second embodiment. Further, in the embodiment, the turning operation detecting device 12 is provided in the turning drive device 11, but the present invention is not limited to this, and for example, an operating tool for turning the upper-part turning body 3 detects the turning operation status of the operating tool. It is also possible to provide a detecting device for performing the turning operation detection. Further, in each of the above embodiments, the size of the swing angle of the lighting device is configured to change in accordance with the swing speed of the upper swing body, but the swing angle is set to a predetermined angle based on the detection of the swing direction. It can be set to swing in the turning direction. In this case, there is an advantage that the number of parts can be reduced, the structure can be simplified, and the cost can be reduced because speed detection is unnecessary. Furthermore, the number of lighting devices is not limited to two, but may be one or three or more, and the mounting portion is not limited to the ceiling surface of the cab, as shown in FIG. Of course, it may be provided on the boom 15 that constitutes the work attachment 4, such as the A portion, the B portion, or the C portion on the front surface of the upper swing body 3.

[0013]

In summary, since the present invention is configured as described above, when the upper swing body is turned, the irradiation direction of the illumination device is changed left and right in response to the turning operation,
The turning direction will illuminate the other side. As a result, the operator can easily confirm the turning direction ahead,
Workability is improved. Further, in the configuration in which the irradiation direction of the lighting device is changed by the change amount calculated to correspond to the turning speed of the upper swing body, the lighting device does not delay even if the swing angle of the upper swing body is fast. By illuminating the other side in the turning direction, it is not necessary to slow down the turning speed for checking obstacles and the like unlike the conventional one in which the lighting device is fixed, and it is possible to further contribute to the improvement of work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a hydraulic shovel.

FIG. 2 is an enlarged view of a lighting device section.

FIG. 3 is a block diagram showing input / output of a control unit.

FIG. 4 is a flowchart of a lighting device swing control routine.

FIG. 5 is a graph showing an example of the relationship between the turning operation and the swing of the lighting device.

FIG. 6 is a graph showing another example of the relationship between the turning operation and the swing of the lighting device.

FIG. 7 is a flowchart of a lighting device swing control routine in another example.

FIG. 8 is a diagram showing another example of a mounting portion of the lighting device.

[Explanation of symbols]

 2 Lower traveling body 3 Upper revolving structure 6 Lighting device 9 Electric motor 12 Turning motion detection device 13 Control unit 14 Lighting switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Nakajima 4-10-1 Yoga, Setagaya-ku, Tokyo Inside New Caterpillar Mitsubishi Corporation (72) Inventor Atsushi Odajima 4-10-1 Yoga, Setagaya-ku, Tokyo New Caterpillar Mitsubishi Corporation (72) Inventor Shoji Tozawa 4-10-1 Yoga, Setagaya-ku, Tokyo Inside New Caterpillar Mitsubishi Corporation

Claims (5)

[Claims] 1. A construction machine in which an upper revolving structure is rotatably supported by a lower traveling structure, and an illuminating unit provided on the upper revolving structure side so as to be able to change the irradiation direction, and an irradiation direction for changing the irradiation direction of the illuminating unit. Drive means, swing operation detecting means for detecting swing operation of the upper swing body, and irradiation means connected to the swing operation detecting means and the drive means, and irradiating the drive means in response to the swing operation detection of the swing operation detecting means. An illumination device for a construction machine, comprising: a drive command unit that outputs a drive control command for changing a direction. 2. The turning operation detecting means according to claim 1, wherein the turning direction of the upper-part turning body is detected, and the drive command section is illuminating means toward the turning operation direction detected by the turning operation detecting means. A lighting device in a construction machine, which is set to output a drive control command for changing the irradiation direction of the. 3. The turning operation detection means according to claim 1, wherein the turning operation direction and the turning operation speed of the upper-part turning body are detected, and the drive command section detects the turning operation speed detected by the turning operation detection means. The irradiation direction change amount is calculated based on the calculated change amount, and a drive control command for changing the irradiation direction toward the detected turning operation direction is output by the calculated change amount. Lighting equipment in machines. 4. The at least one left and right pair of a lighting unit and a driving unit are provided on the upper revolving structure side, and the drive command section turns the turning operation with respect to the driving unit on the turning operation direction side. Direction, the drive control command is output to change the illumination direction, but the drive control command is not output to the drive means on the side opposite to the turning operation direction, or the illumination direction of the turning operation side illumination means is changed. An illumination device in a construction machine, wherein the illumination device is set to output a drive control command for changing the irradiation direction toward the turning operation direction by an amount smaller than the amount. 5. The drive command unit according to claim 1, wherein the drive command unit is set to output a drive control command only while the lighting switch of the illumination means is in the ON state. Lighting equipment for construction machinery.