JP3210841B2 - Lighting equipment for 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 lighting device for a construction machine having an upper rotating body such as a hydraulic shovel.

[0002]

2. Description of the Related Art In general,
In construction machines such as this type of hydraulic excavator, for example, an illumination device that illuminates the front of the driver's seat is arranged above the cab,
It is designed to improve workability at night, in rainy weather, or in dark places such as in tunnels. By the way, when turning the upper swing body, the operator needs to check the presence or absence of an obstacle by looking ahead in the swing direction. In particular, in construction machines, even the work attachment provided so as to protrude forward from the upper revolving structure turns integrally, so it is necessary to turn with great care in front of the turning locus of the work attachment. There is. However, since the conventional lighting device is fixed so as to illuminate the front of the driver's seat,
The turning direction cannot be sufficiently illuminated. In particular, when the turning speed is high, the lighting cannot reach the turning direction. For this reason, when the lighting device is turned on at night or the like, it is a fact that the turning speed is used to check for an obstacle or the like, and there is a problem that the working efficiency is poor.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made with the object of providing a lighting device for a construction machine capable of solving these problems. In a construction machine in which an upper revolving body is pivotally supported on a traveling body, an illuminating means is provided on an upper revolving body side so as to be capable of changing an irradiation direction, a driving means for changing an irradiating direction of the illuminating means left and right, and A turning operation detecting means for detecting a turning operation of the revolving body, and a turning operation detecting means connected to the turning operation detecting means and the driving means for changing the irradiation direction in response to the turning operation detection of the turning operation detecting means. And a drive command section for outputting the drive control command of the above.

According to the present invention, when the upper revolving structure is swiveled, it is possible to sufficiently illuminate the turning direction ahead.

[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. The hydraulic excavator 1 includes a crawler-type lower traveling body 2, an upper revolving body 3 that is rotatably supported above the lower traveling body 2,
Although the basic structure such as being composed of each member such as a work attachment 4 attached to the front part of the upper revolving structure 3 is the same as the conventional one, the upper revolving structure 3 is provided with a cockpit 5a. A covering cab 5 is provided.

Reference numeral 6 denotes a pair of right and left lighting devices provided on the cab 5. A support shaft 7 extending vertically is suspended from a lower end of each lighting device 6. The support shaft 7 is supported by left and right brackets 8 attached to the left and right corners of the upper front end of the cab 5 so as to be rotatable around the respective axes, and an electric motor 9 housed in each bracket 8. Is linked to the output shaft of
Thus, the illumination device 6 swings in the left-right direction based on the forward / reverse drive of the electric motor 9 to change the irradiation direction left / right. Incidentally, in this embodiment, the electric motor 9 has a built-in speed reducer (for example, a geared motor).

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

The control section 13 is constituted by a microcomputer or the like, and controls the turntable detecting section 12 and the lighting section 6 to turn on the cockpit section 5a.
And outputs a control command 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 with reference to the flowchart illustrated in FIG.
First, it is determined whether or not the lighting switch 14 is ON. If it is determined to be ON, then
Based on an input signal from the turning operation detecting device 12, it is determined whether or not the upper revolving unit 3 is turning, and when it is determined that the upper turning body 3 is turning, the turning operation detecting device 12 The direction and the angle at which the lighting device 6 swings are calculated based on the input detection signals of the turning direction and the turning speed. Here, the memory of the control unit 13 includes the lighting device 6 corresponding to the turning direction and the turning speed of the upper turning body 3.
5, the swing direction is the same as the turning direction, and the swing angle is set to increase as the turning speed increases. The control unit 13 calculates the direction and angle at which the lighting device 6 swings based on the data. Note that this data may of course be set so as to change 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 turns the upper revolving unit 3. It is configured to swing left and right according to the direction and the turning speed. The lighting switch 14 is off.
Or when it is determined that the upper swing body 3 is not turning, the control unit 13 outputs a drive control command to the electric motor 9 so that the lighting device 6 faces forward.

In the embodiment of the present invention constructed as described above, when the upper revolving unit 3 is turned, the illuminating device 6 swings right and left with the turning to illuminate the turning direction ahead. As a result, the operator can easily confirm the turning direction ahead, and the workability is improved.

In addition, since the swing angle of the illuminating device 6 is set so that the swing angle increases as the swing speed of the upper swing body 3 increases, even if the swing angle of the upper swing body 3 is fast. The illuminating device 6 illuminates the turning direction ahead without delay, so that it is not necessary to reduce the turning speed for checking an obstacle or the like as in the conventional device in which the illuminating device is fixed, and the work efficiency is reduced. It can contribute to improvement.

In addition, in this embodiment, the lighting device 6
Is set to be performed only when the lighting switch 14 is in the ON state, so that waste such as driving of the electric motor 9 when the lighting device 6 is not turned on can be eliminated.

It should be noted that the present invention is not limited to the above embodiment. In the embodiment, both the left and right lighting devices 6 swing by the same angle in the turning operation direction of the upper turning body 3. Although the configuration is adopted, of the left and right illumination devices 6, the illumination device 6 on the turning operation direction side, that is, if it is a right turn, the right illumination device 6 is swing-controlled along with the turn as in the previous embodiment. However, the lighting device 6 on the opposite side to the turning operation direction (in this case, the left side) may be kept illuminating the front without swinging, or may swing by an angle smaller than the swing angle of the lighting device 6 on the turning operation direction side. It is also possible to irradiate the work attachment 4 so that the optical axis is directed toward the tip of the work attachment 4. In such a case, the lighting device 6 on the turning operation direction side turns the tip of the turning direction forward. While illuminating, the lighting device 6 on the opposite 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 carrying out the second embodiment. Furthermore, in the embodiment, the turning operation detecting device 12 is provided in the turning driving device 11, but the present invention is not limited to this. For example, the turning operation state of the operating device for turning the upper turning body 3 is detected. It is also possible to provide a detecting device for detecting the turning operation by the detecting device. Further, in each of the above embodiments, the magnitude of the swing angle of the lighting device is configured to change in accordance with the turning speed of the upper turning body, but only a fixed angle set in advance based on the detection of the turning 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, for example, speed detection becomes unnecessary. Furthermore, the number of the lighting devices is not limited to two, and may be one, or three or more. 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 a portion A, a portion B, or a portion C on the front surface of the upper rotating body 3.

[0013]

In summary, since the present invention is configured as described above, when the upper revolving unit is turned, the irradiation direction of the lighting device is changed left and right in accordance with the turning operation.
This will illuminate the turning direction ahead. As a result, the operator can easily confirm the turning direction ahead,
Workability is improved. Further, in a 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 rotating body, the lighting device is not delayed even if the turning angle of the upper rotating body is fast. By illuminating the tip of the turning direction, there is no need to reduce the turning speed to check for an obstacle or the like as in the conventional device in which the lighting device is fixed, and it is possible to further contribute to the improvement of work efficiency.

[Brief description of the drawings]

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

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

FIG. 3 is a block diagram showing input and 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 body 6 Lighting device 9 Electric motor 12 Turning operation detecting device 13 Control unit 14 Lighting switch

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norio Nakajima 4-10-1, Yoga, Setagaya-ku, Tokyo New Inside Caterpillar Mitsubishi Co., Ltd. (72) Inventor Atsushi Odashima 4-1-1, Yoga, Setagaya-ku, Tokyo New Caterpillar Mitsubishi Co., Ltd. (72) Inventor Shoji Tozawa 4-1-1, Yoga, Setagaya-ku, Tokyo New Caterpillar Mitsubishi Co., Ltd. (56) References JP-U 6-67177 (JP, U) JP-A 57- 53941 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02F 9/00 E02F 9/24 F21S 2/00 F21V 21/14

Claims (5)

(57) [Claims] 1. A construction machine in which an upper revolving unit is pivotally supported by a lower traveling unit, a lighting unit provided on the upper revolving unit side so as to be capable of changing an irradiation direction, and an illumination unit for changing the irradiation direction of the illumination unit. A driving means, a turning operation detecting means for detecting a turning operation of the upper revolving structure, and an irradiation connected to the turning operation detecting means and the driving means, the driving means corresponding to the turning operation detection of the turning operation detecting means. A driving command unit that outputs a driving control command for changing a direction, the lighting device for a construction machine. 2. The turning operation detecting means according to claim 1, wherein the turning operation detecting means detects a turning direction of the upper revolving body, and the driving command unit outputs the illuminating means toward the turning operation direction detected by the turning operation detecting means. A lighting device for a construction machine, wherein the driving device is configured to output a drive control command for changing an irradiation direction. 3. The turning operation detecting means according to claim 1, wherein the turning operation detecting means detects a turning operation direction and a turning operation speed of the upper revolving body, and the drive command unit detects the turning operation speed detected by the turning operation detecting means. The construction is such that 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 by the calculated change amount is output. Lighting equipment in machinery. 4. An upper revolving body according to claim 2, wherein at least one pair of left and right illumination means and driving means are provided on the upper revolving unit side, and the drive command unit performs a revolving operation with respect to the driving means on the revolving operation direction side. While the drive control command is output to change the illumination direction toward the direction, the drive control command is not output to the drive unit on the side opposite to the turning operation direction, or the illumination direction of the turning operation side illumination unit is changed. A lighting device for a construction machine, wherein the lighting device is set to output a drive control command for changing an irradiation direction toward a turning operation direction by an amount smaller than the amount. 5. The driving command unit according to claim 1, wherein the driving command unit is set to output a driving control command only while a lighting switch of the lighting unit is in an ON state. Lighting equipment in construction machinery.