JP2003300690A - Display device of construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inform an operator in an operator cab of the direction and speed of wind. <P>SOLUTION: A revolving superstructure 113 is provided with a wind direction/ speed detector 4. A control unit 10 samples signals from the wind direction/speed detector 6 and then outputs picture control signals to a display 8. Based on the control signals, a crane is displayed on the display part 8a of the display 8 in the form of an icon, with the direction and speed of wind being displayed in the form of an icon 42 alongside the icon 41 using a display method matching a weather chart. Since the display (shape and direction) of the icon 24 is varied depending on the values detected by the wind direction/speed detector 6, the operator can easily know the direction and speed of wind. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for a construction machine, which displays various information on a display for display in a driver's cab.

[0002]

2. Description of the Related Art In construction machines such as cranes and jib cranes, there is known a device for displaying work-related information on a display for display in a driver's cab (for example, Japanese Patent No. 2644352). In the device described in this publication, a part of the crane is schematically displayed, and the display is changed according to the movement and shape of the crane.

[0003]

By the way, during hanging work of a crane, it is desirable to perform work while taking into consideration the wind direction and wind speed at the work site because load shake, crane boom, and sway of the jib itself easily occur. . In addition, since the stability of the vehicle body is poor on a sloping ground, it is necessary to work in consideration of the inclination angle of the vehicle body. Further, when the crane is turned, it is possible to prevent the operator from erroneously recognizing the front-back direction of the crawler (traveling body) and traveling the crawler in the reverse direction, so that the front-back direction of the crawler can be easily determined. Preferably.

However, the device described in the above publication displays the posture and load information of the crane, and
Information such as wind speed, vehicle inclination, and crawler longitudinal direction is not displayed. Therefore, the operator cannot accurately grasp such information while staying in the cab.

An object of the present invention is to provide a display device for a construction machine which allows an operator to easily grasp information such as wind direction, wind speed, vehicle body inclination angle, crawler front-back direction and the like.

[0006]

(1) A display device for a construction machine according to a first aspect of the present invention comprises a display for display provided in a driver's cab, and wind direction and wind speed detection means for detecting wind direction and wind speed at a work site. The above-described object is achieved by including display control means for displaying information on the wind direction and the wind speed detected by the wind direction and wind speed detection means as an icon on the display. (2) A display device for a construction machine according to a second aspect of the present invention is a traveling body, a revolving body provided so as to be revolvable with respect to the traveling body, a display for display provided in a driver's cab, and a wind direction at a work site. And a wind direction wind speed detecting means for detecting the wind speed,
A turning angle detecting means for detecting the turning angle of the turning body and information about the wind direction and the wind speed detected by the wind direction wind speed detecting means are displayed as an icon on the display, and the wind direction with respect to the turning body matches the direction of the icon. ,
The above-described object is achieved by including a display control unit that rotates the control unit according to the turning angle detected by the turning angle detection unit. (3) According to the invention of claim 3, in the display device for a construction machine according to claim 1 or 2, the display control means changes the color of the icon according to the wind speed detected by the wind speed wind speed detection means. is there. (4) The invention according to claim 4 is the display device for a construction machine according to any one of claims 1 to 3, further comprising selection means for selecting display contents to be displayed on the display, and the display control means selects. The icon is displayed or hidden depending on the selection by the means. (5) The invention according to claim 5 is the display device for a construction machine according to any one of claims 1 to 4, further comprising a tilt angle detection means for detecting a tilt angle of the vehicle body, and the display control means further tilts. According to the tilt angle detected by the angle detection means, the tilted state of the vehicle body is iconified and displayed on the display. (6) The display device of the construction machine according to the invention of claim 6 is
A traveling body, a revolving body provided so as to be revolvable with respect to the traveling body, a display for display provided in a driver's cab, a swing angle detecting means for detecting a swing angle of the swing body, and a swing angle detecting means for detecting the swing angle. The above-described object is achieved by including display control means for displaying the revolving structure as an icon on the display according to the determined turning angle.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a display device for a construction machine according to the present invention will be described below with reference to FIGS. FIG. 1 is a side view of a crawler crane having a display device according to an embodiment of the present invention. The crawler crane includes a traveling body 111 having a pair of left and right crawler tracks (crawlers), a revolving structure 113 rotatably mounted on the traveling structure 111 via a revolving wheel 112, and a undulating front portion of the revolving structure 113. The swing structure 1 includes a boom 114 and a front attachment 116 including a jib 115.
A counterweight 117 is mounted on the rear part of 13.
The main hook 12 is attached to the boom tip via the main winding rope 118.
0 is hung, and the auxiliary hook 121 is hung on the tip of the jib via the auxiliary winding rope 119. A plurality of winch drums (not shown) are mounted on the revolving structure 113. The ropes 118 and 119 are wound or unwound by driving the winch drums, or the boom 114 and the jib 115 are mounted.
The suspended load supported by the hooks 120 and 121 moves up and down due to the ups and downs. In addition, below, the case where a suspended load is supported by the main hook 120 is demonstrated.

Such a crane is provided with an overload preventing device for preventing the crane from tipping over. Figure 2
FIG. 3 is a block diagram showing configurations of a display device and an overload prevention device according to the present embodiment. The control unit 10 includes an angle detector 1 for detecting a boom angle and a load detector 2 for detecting a weight of a suspended load suspended by a crane.
And an engine rotation detector 3 for detecting the engine speed
A wind direction and a wind speed detector 4 for detecting a wind direction and a wind speed, a tilt angle detector 5 for detecting a tilt angle of the vehicle body, and a turning angle detector 6 for detecting a turning angle of the revolving structure 113 with respect to the traveling structure 111.
And an input device 7 for inputting various specification values by an operator, respectively.

FIG. 3 is an enlarged view of the input device 7. The input device 7 includes movement keys 7a, 7b, 7 for setting various specification values.
c, 7d, a decision key 7e for deciding the setting by the movement keys 7a, 7b, 7c, 7d, a cancel key 7f for canceling the decision by the decision key 7e, and a menu key 7g for displaying a display menu. Control unit 10
Then, predetermined processing is executed based on the input signals from the input device 7 and the detectors 1 to 6, and control signals are output to the display 8 for display and the solenoid valve 9 for stopping the winch drum, respectively, in the driver's cab.

FIG. 4 is a block diagram showing a detailed structure of the control unit 10. The control unit 10 converts signals from the angle detector 1, the load detector 2, the engine rotation detector 3, the wind direction wind speed detector 4, the inclination angle detector 5, and the turning angle detector 6 from an analog signal into a digital signal. A / D converter 11, interface 12 for inputting signals from input device 7, CPU 13, ROM 14, RAM
15 has a single chip microcomputer 20 which is integrated.

Further, the control unit 10 has a nonvolatile memory EEPR for storing various specification values set by an operator.
OM 19, display processing unit 16 that performs image creation processing, interface 1 that converts the output signal to the display 8
7, and an amplifier 18 that outputs to the solenoid valve 9. R
The OM 14 stores a plurality of rated load curves according to the specifications of the crane. The rated load curve shows the relationship between the working radius and the limit load (rated load) corresponding to the working radius. An example of the rated load curve is shown in FIG.

In the control unit 10, the working radius, the actual load, the limit load, and the load factor, which is the ratio of the actual load to the limit load, are respectively calculated based on the signals from the angle detector 1 and the load detector 2 and the rated load curve. It is calculated to determine whether or not it is in an overload state. When the load factor exceeds a predetermined value (for example, 100%), the overload state is determined, and a control signal is output to the solenoid valve 9. As a result, the drive of the winch drum is forcibly stopped, and work beyond the range of the rated load curve is prohibited.

Further, in the control unit 10, the input device 7
Also, the processing relating to image creation is performed based on the input signals from the detectors 1 to 6, and a predetermined image control signal is output to the display 8. The display 8 includes a display unit 8a such as an LCD, and displays an image as shown in FIG. 6 on the display unit 8a in response to a signal from the control unit 10.

FIG. 6 shows an example of image display during work.
The display unit 8a is composed of a main screen 8A in the center of the screen and a sub screen 8B on the right side of the screen. On the main screen 8A,
A side view of the entire crane is schematically displayed, and display windows 31 to 39 are provided at predetermined locations corresponding to the schematic view.
The boom angle detected by the angle detector 11 is displayed on the display window 31, the mounting offset angle of the jib 115 is displayed on the display window 32, and the boom length input by the input device 7 is displayed on the display windows 33 and 34. , The jib length is displayed, and the work radius, the actual load, the limit load, the limit work radius, and the height of the boom tip calculated by the control unit 10 are displayed in the display windows 35 to 39, respectively. The load factor is displayed by a bar graph 40 above the schematic diagram of the crane.

On the sub-screen 8B, an icon (symbolized figure) 41 imitating a plan view of the crane is displayed, and an icon 42 indicating a wind direction and a wind speed is displayed on the side thereof. Below the icons 41 and 42, an icon 43 imitating a side view of the crane is displayed. The icon 43 is displayed tilted from the horizontal line 43a according to the tilt angle detected by the tilt angle detector 5. That is, the tilted state of the crane and the display match, which allows the operator to easily recognize the tilted state of the crane. The tilt angle detection value is also displayed on the icon 43.

FIG. 7 is an enlarged view of the icons 41 and 42. The display of the icon 41 is switched upside down according to the turning angle detected by the turning angle detector 5, as shown by the dotted line in the figure. That is, the traveling body 111 and the swinging body 113
When the front and back directions of the two are the same (turning angle: -90 ° ~
90 °), the icon 41 is displayed as shown by the solid line in the figure, and when the revolving structure 113 is in the opposite direction to the traveling structure 111 (revolving angle: 90 ° to 270 °), the icon 41 is shown as shown by the dotted line. Is displayed. Thereby, the operator can determine the direction of the revolving structure 113 with respect to the traveling structure 111, that is, the front-back direction of the crawler.

The icon 42 conforms to the method of displaying a weather map, and the wind direction line 42b starting from the white circle 42a.
And a plurality of wind speed blades 42c generated from the wind direction line 42b
Have and. The wind direction line 42b indicates the wind direction with respect to the revolving structure 113, and when the revolving structure 113 is rotated under a constant wind direction, the line 42b rotates around the white circle 42a as a fulcrum as shown by a dotted line in accordance with the revolving angle. . This allows the operator to easily recognize the wind direction with respect to the revolving structure 113.

The wind speed blade 42c indicates the wind speed,
As the wind speed increases, the number of wind speed blades 42c increases. In the present embodiment, the color of the icon 42 is further changed according to the wind speed. In this case, for example, when the wind speed is less than a preset predetermined value F1, green indicating that it is okay to perform the work, and when the wind speed is greater than or equal to the predetermined value F1 and less than the predetermined value F2, the work needs attention The display color is changed to yellow and red when the wind speed is equal to or higher than the predetermined value F2 to prompt the stop of the work. Thus, the operator can easily recognize the wind speed and can easily determine whether or not the work environment is suitable for performing work.

FIG. 8 is a flow chart showing an example of processing in the control unit 10. This flowchart starts when the power key switch is turned on. First,
In step S1, the EEP is preliminarily input by the input device 7.
The specification values such as boom type, boom length, and jib length stored in the ROM 19 are read. Next, in step S2, the signals from the detectors 1 to 6 are read, and in step S3, the wind direction, the wind speed, and the inclination angle of the main body are calculated based on the detection signals, and the front-back direction of the crawler is determined.

Next, in step S4, the boom angle, working radius, limit load, actual load, and load factor are calculated, and in step S5, it is determined whether or not there is overload. If it is determined that the overload, that is, the load factor is equal to or more than the predetermined value, the process proceeds to step S6. In step S6, a control signal is output to the solenoid valve 9 to close the solenoid valve 9 and cut off the supply of pressure oil to the winch drum. As a result, the drive of the winch drum is stopped. Note that an alarm may be simultaneously output in step S6 to notify the operator of the work limit. On the other hand, if it is determined that the load factor is less than the predetermined value, the process proceeds to step S7. In step S7, a control signal is output to the solenoid valve 9 to open the solenoid valve 9 to allow the supply of pressure oil to the winch drum. In step S8, the icons 41 to 4
It outputs an image signal for displaying 3 and various numerical values. As a result, the image is displayed on the display 8.

The image display on the display 8 is performed by the input device 7.
It can be switched by operating the menu key 7g. FIG. 9 is a flowchart showing an example of processing relating to switching of image display executed by the control unit 10. This flow chart starts simultaneously with the flow chart of FIG. 8, and in step S11, the moment limiter image as shown in FIG. 6 is displayed. In step S12, it is determined whether or not the menu key 7g is operated. If the result is affirmative, the process proceeds to step S13, and if the result is no, the process returns to step S11. FIG. 10 shows an example of a display image when the menu key 7g is operated. In FIG. 10, a menu is displayed in a pop-up, and the move keys 7a, 7
The function is selected with b and is determined with the enter key 7e. In step S13, it is determined what the selected function is.

If, for example, work state setting is selected from the menu, the process proceeds to step S14. In step S14, the work status setting screen is displayed. Next, in step 15, it is determined whether or not the menu key 7g is operated. If the result is affirmative, the process proceeds to step S13.
Return to 14. An example of the work status setting screen displayed in step S14 is shown in FIGS. In FIG. 11, the display unit 8
The setting contents are displayed on the whole a. In FIG. 12, the setting window is displayed together with the schematic diagram of the crane, and when the set value is changed, the schematic diagram (the length of the jib in the figure) also changes accordingly.
In this state, the moving keys 7a to 7d and the enter key 7e are operated to set the working state. When setting the work state, the wind direction, the wind speed, etc. are irrelevant, and the icons 41 to 43 are not displayed.

As described above, according to this embodiment, the wind direction and the wind speed are displayed as icons during work.
The operator can easily recognize the wind direction and the wind speed while staying in the cab. As a result, it becomes possible to perform appropriate work in consideration of the influence of wind. Since the wind direction icon 42 is rotated along with the swing of the swing body 113, it is possible to prevent the operator from mistakenly determining the wind direction when the swing body 113 is swung. Since the color of the icon 42 is changed according to the wind speed, it is possible to easily determine whether or not the wind speed is suitable for the work.

Since the tilted state of the crane is displayed as an icon, the operator can grasp the tilted state to perform the work and prevent the crane from tipping over. Since the front and rear directions of the crawler are displayed as icons, it is possible to prevent the crawler from accidentally running backward. The image display is switched by operating the menu key 7g, and the display of the icons 41 to 43 is erased when the work state is set. Therefore, the display space is effectively used without displaying the icons 41 to 43 except when necessary. can do.

The display device for the construction machine according to the present invention is not limited to the above-described embodiment, and various modifications can be made. In the above embodiment, the wind direction is displayed based on the revolving structure 113, but a direction sensor may be provided to display the wind direction based on the direction. Although the front-back direction of the crawler is switched and displayed by the icon 41, it is also possible to display not only the front-back direction but also the middle direction. The arrangement, size, and shape of the icons are not limited to the embodiment. When the wind speed becomes a problem during work, the display of the icon 42 may be enlarged to call attention. When the wind speed is equal to or higher than the predetermined value F2, a control signal may be output to the solenoid valve 9 to prohibit the work.

In the above embodiment, the wind direction and wind speed detector 4 as the wind direction and wind speed detecting means may be any one as long as it can detect the wind direction and the wind speed. The control unit 10 as the display control means does not have to control the overload prevention device. The tilt angle detector 5 as the tilt angle detecting means may be any one as long as it can detect the tilt angle. The turning angle detector 6 as the turning angle detecting means may be any one as long as it detects a turning angle. You may comprise a selection means other than the menu key 7g. The display device of the present invention may be applied to construction machines other than cranes.

[0027]

As described in detail above, according to the present invention, the information on the wind direction and the wind speed, the inclination information of the vehicle body,
Since the direction of the traveling body is displayed as an icon on the display, the operator can easily grasp this information while staying in the cab.

[Brief description of drawings]

FIG. 1 is a side view of a crawler crane having a display device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a display device and an overload prevention device according to an embodiment of the present invention.

FIG. 3 is an enlarged view of an input device that constitutes the display device according to the embodiment of the invention.

FIG. 4 is a block diagram showing a configuration of a control unit according to the embodiment of the present invention.

FIG. 5 is a diagram showing an example of a rated load curve.

FIG. 6 is a diagram showing an example of image display displayed by the display device according to the embodiment of the present invention.

7 is an enlarged view of the icon shown in FIG.

FIG. 8 is a flowchart showing an example of processing in the control unit.

FIG. 9 is a flowchart showing an example of processing relating to switching of image display.

FIG. 10 is a diagram showing an example of switching of image display.

FIG. 11 is a diagram showing an example of an image display when a work state is set.

FIG. 12 is a diagram showing another example of image display when the work state is set.

[Explanation of symbols]

4 Wind direction wind speed detector 5 Tilt angle detector 6 Swing angle detector 7 Input device 7g Menu key 8 Display 8a Display section 9 Solenoid valve 10 Control unit 41 Icon 42 icon 42b Wind direction line 42c Wind speed blade 43 icon 111 Traveling body 113 Swinging body 114 boom 115 jib

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junichi Narusawa             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Kenya Shoko             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Kenichi Sagitani             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Toshiyuki Miyamoto             Hitachi Construction Machinery Co., Ltd.             Ceremony Company Tsuchiura Factory (72) Inventor Shin Sasaki             5- 1-3 Nakagawa Adachi-ku, Tokyo Stock market             Company Hitachi Software Development Center F-term (reference) 2D015 HA03 HB00 HB04

Claims (6)

[Claims] 1. A display for display provided in a driver's cab, wind direction wind speed detection means for detecting wind direction and wind speed at a work site, and information on the wind direction and wind speed detected by the wind direction wind speed detection means on the display. A display device for a construction machine, comprising: a display control unit that displays the converted data. 2. A traveling body, a revolving body provided so as to be rotatable with respect to the traveling body, a display for display provided in a driver's cab, and a wind direction wind speed detecting means for detecting a wind direction and a wind speed at a work site. A turning angle detecting means for detecting a turning angle of a turning body, and information on the wind direction and wind speed detected by the wind direction wind speed detecting means is displayed as an icon on the display, and the wind direction with respect to the turning body is the direction of the icon. A display device for a construction machine, comprising: display control means for rotating the icon in accordance with the turning angle detected by the turning angle detection means so as to coincide with each other. 3. The display device for a construction machine according to claim 1, wherein the display control unit changes the color of the icon according to the wind speed detected by the wind speed wind speed detection unit. Display equipment for construction machinery. 4. The display device for a construction machine according to claim 1, further comprising a selection unit that selects display contents to be displayed on the display, and the display control unit is configured by the selection unit. A display device for a construction machine, wherein the icon is displayed or hidden according to selection. 5. The display device for a construction machine according to claim 1, further comprising a tilt angle detecting means for detecting a tilt angle of a vehicle body, wherein the display control means further comprises the tilt angle detecting means. A display device for a construction machine, wherein the tilted state of the vehicle body is iconified and displayed on the display in accordance with the tilt angle detected by. 6. A traveling structure, a revolving structure provided so as to be capable of revolving with respect to the traveling structure, a display for display provided in a driver's cab, and a rotation angle detecting means for detecting a rotation angle of the revolving structure, A display device for a construction machine, comprising: display control means for displaying the revolving structure as an icon on the display in accordance with the turning angle detected by the turning angle detecting means.