JP2007008284A - Display device for working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for a working machine capable of meeting an operator's demand in a cab who responds to unexpected occurrence in a working machine. <P>SOLUTION: A display face part 26 is formed by sticking a film different in transmission on a front window 24 of the cab 14 of the working machine. A projector 27 providing visual information requested from the operator 20 in the cab 14 is installed with respect to the display face part 26. The projector 27 is installed in a console box positioned at one side of a driver's seat 21. A control means 58 controls to indicate occurrence of trouble in a corner of the display face part 26 when any trouble has occurred in the working machine, and controls to indicate detailed information for responding to the trouble on a whole face of the display face part 26 by starting a lock device 54 which forcibly stops operation of the working machine. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display device for a work machine mounted on a construction machine.

  When an unexpected trouble occurs in the work machine, the operator takes out the manual, finds the item corresponding to the trouble, and deals with the trouble while reading the item. In addition, the information that can be obtained by the operator is limited by the manual alone. Furthermore, even when referring to simple materials, the work efficiency is lowered because the work is interrupted and the work machine is lowered from the cab.

On the other hand, a semi-transparent screen is provided on the rear glass of the work machine, a projector is provided on the lower surface of the ceiling with respect to the screen, and a display device that displays information to the outside through the semi-transparent screen from the projector is provided, There is one that can transmit information related to the construction site in real time to the residents in the vicinity of the work site, and can notify caution information during operation of the work machine to people around the machine (for example, see Patent Document 1).
JP 2002-323869A (page 4-5, FIG. 1)

  Thus, conventionally, it is difficult to deal with troubles occurring in the work machine, and the invention described in Patent Document 1 also has a problem that the visual information required by the operator of the work machine cannot be obtained.

  The present invention has been made in view of these points, and an object of the present invention is to provide a display device for a work machine that can provide necessary visual information to an operator who copes with an unexpected situation that has occurred in the work machine. To do.

  According to the first aspect of the present invention, there is provided a display surface portion formed of a film having a different transmittance that is affixed to a transparent window material of a work machine, and an operator of the work machine visually installs the display surface portion through the display surface portion. A display device for a work machine including a projector that provides information.

  According to a second aspect of the present invention, the transparent window member in the work machine display device according to the first aspect is a front window.

  According to a third aspect of the present invention, the projector in the work machine display device according to the first or second aspect is provided in a console box located on one side of the driver's seat.

  According to a fourth aspect of the present invention, in the work machine display device according to any one of the first to third aspects, when a trouble occurs in the work machine, the occurrence of the trouble is displayed at one corner of the display surface, and the operation of the work machine is controlled. Control means for displaying detailed information for coping with a trouble on the entire surface of the display surface by starting the lock device forcibly stopped.

  According to a fifth aspect of the present invention, the visual information in the work machine display device according to any one of the first to fourth aspects is updated by data communication with an external server.

  According to the first aspect of the present invention, the visual information is provided from the projector to the operator of the work machine through the display surface portion formed by the film having a different transmittance attached to the transparent window material of the work machine. The machine operator can know that an unexpected situation has occurred in the work machine via the display surface of the transparent window material even when the work machine is in operation, and to deal with the unexpected situation, etc. You can get the visual information you need.

  According to the second aspect of the present invention, the display surface portion formed by the film having a different transmittance attached to the front window is easily noticeable to the operator who is working, and can be easily seen while being overlooked. it can.

  According to the third aspect of the present invention, the projector provided in the console box is suitable for displaying visual information at a height that is easy to see from an operator without taking up space.

  According to the invention of claim 4, the operator of the work machine can know the trouble occurrence by the trouble occurrence display displayed at one corner of the display surface portion, and detailed information for dealing with the trouble displayed on the entire surface of the display surface portion. Since the operation of the work machine is forcibly stopped by the lock device in a state where there is a possibility that the operator's field of view may be obstructed, erroneous operation due to the operator's poor field of view can be reliably prevented.

  According to the fifth aspect of the invention, the operator of the work machine can obtain the latest visual information updated by data communication with the external server.

  Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS.

  FIG. 3 shows a hydraulic excavator type work machine 10, in which an upper swing body 13 is turnably provided on a lower traveling body 11 via a swing bearing portion 12, and a work device 15 together with a cab 14 is placed on the upper swing body 13. Is installed. A transmitter / receiver 18 and an antenna 19 for data communication with an external server installed in the management office 16 via a communication satellite 17 are provided above the cab 14.

  As shown in FIG. 1, a driver's seat 21 on which an operator 20 sits is installed in a cab 14 of the work machine 10, and console boxes 22 are respectively arranged on the left and right sides of the driver seat 21. Operation levers 23 for work are respectively installed on 22, and an operation pedal (not shown) for traveling is installed on the front floor surface of the driver's seat 21.

  The cab 14 has a glass front window 24 as a transparent window material on the front side, side windows (not shown) on both the left and right sides, and a rear window (not shown) on the back side. A work machine display device 25 is provided.

  The work machine display device 25 includes a display surface portion 26 formed of a film having a different transmittance attached to the front window 24, and an operator in the cab 14 installed on the display surface portion 26 via the display surface portion 26. And a projector 27 that provides the visual information required by 20.

  As shown in FIG. 2, the projector 27 is provided in a console box 22 located on one side of the driver's seat 21. A projection window 28 is opened in front of the console box 22, and an image output from the projector 27 is projected from the projection window 28 toward the display surface portion 26 of the front window 24. Returning to FIG. 1, an operation switch 29 for manually operating the projector 27 is provided on the upper surface of the console box 22.

  As shown in FIG. 1, a hydraulic lock lever 31 that opens and closes the cab 14 is provided on the upper side surface of the console box 22 on the other side located on the cab 14 side. When the operator 20 is lowered to the passage opening position (solid line position in FIG. 1) so that the operator 20 moves up and down in the cab 14, the hydraulic control lever 31 and the operation pedal (not shown) To lock the hydraulic circuit so that the hydraulic circuit does not function even if it is operated. The lock lever switch 33 such as a limit switch provided in the lever base end cover 32 causes the hydraulic lock lever 31 to The lock release state raised to the blocking position (the two-dot chain line position in FIG. 1) and the lock state that is not so are identified and detected.

  A main pump 35 driven by an engine 34 mounted on the work machine 10 pressurizes and supplies hydraulic oil in a tank 36 to a control valve 37. The control valve 37 is a travel motor (not shown) of the lower traveling body 11. 1), the slewing motor (not shown) of the slewing bearing 12 and the working fluid (oil) to be supplied / discharged to / from the actuator 38 such as each cylinder of the work unit 15 by controlling the direction and flow rate of the actuator 38. To control.

  The control valve 37 incorporates a plurality of spools that are displaced by receiving pilot pressure supplied through a pilot pressure output passage 45 from a plurality of pilot valves 44 that are manually operated by a work operation lever 23 or a travel operation pedal. is doing.

  Each pilot valve 44 receives the pilot primary pressure supplied from the pilot pump 47 driven by the engine 34 together with the main pump 35 via the pilot primary pressure passage 48, and operates the operation lever 23 and the travel operation pedal ( This is a manual pressure reducing valve that performs pressure reduction control to a pilot secondary pressure substantially proportional to the operation amount (not shown) and outputs the pilot pressure to the pilot pressure output passage 45.

  A lock solenoid valve 51 is provided in a pilot primary pressure passage 48 for supplying pilot primary pressure to these pilot valves 44. The solenoid valve 51 for locking receives the electric signal (current) from the outside from the tank position Т that connects the pilot primary pressure passage 48 to the tank passage 53 and displaces the pilot primary pressure passage 48. Is switched to the communication position P for short-circuiting.

  The hydraulic lock lever 31, the lock lever switch 33, the lock electromagnetic valve 51, and the like form a lock device 54 that forcibly stops the operation of the work machine.

  The lock solenoid valve 51 of the lock device 54 does not supply the pilot primary pressure to the pilot valve 44 when the solenoid 52 is energized and is in the locked state shown in FIG. Even if the operating lever 23 for driving and the operating pedal for traveling (not shown) are operated, the spools of the control valve 37 cannot be displaced, and therefore the actuator 38 of the work machine 10 is controlled to be locked. it can. On the other hand, when the solenoid valve 51 for locking is turned on to switch to the communication position P by energizing the solenoid 52, the locked state can be released.

  Operation discrimination that determines whether the operator has operated the operation lever 23 for work and the operation pedal for travel (not shown) in the pilot pressure output passage 45 of each pilot valve 44 or not in operation. Each means 55 is installed.

  These operation discriminating means 55 are configured such that a pressure switch 57 is connected to a pilot pressure output passage 45 of each pilot valve 44 via a shuttle valve 56, so that at least one pilot valve 44 can be moved in one direction or the other direction by an operator. Is operated, the pilot pressure output to the control valve 37 from one of the two pilot pressure output passages 45 is led out to the outside by the shuttle valve 56 and detected by the pressure switch 57. be able to.

  The control means 58 mounted on the work machine 10 is a controller incorporating hardware such as an arithmetic device and a storage device and software such as a control program. Transmitter / receiver 18, an operation switch 29 for manually operating the projector 27 of the display device 25 for work machine via the control means 58, and a lock lever switch for determining whether or not the hydraulic lock lever 31 is in the passage blocking position 33, the pressure switch 57 of the operation determination means 55 for determining whether or not the operation lever 23 for work and the operation pedal (not shown) for traveling are in an operation state are connected.

  On the other hand, at the output part of the control means 58, the projector 27 of the display device 25 for the work machine, the solenoid 52 of the solenoid valve 51 for locking, and the minimum necessary display such as a warning when a trouble occurs in the work machine 10. A sub monitor 59 or the like is connected.

  This control means 58 displays a trouble occurrence at one corner of the display surface portion 26 when a trouble occurs in the work machine 10, and causes the trouble on the entire surface of the display surface portion 26 by starting the lock device 54 that forcibly stops the operation of the work machine 10. The projector 27 has a function of controlling the projector 27 so as to display detailed information to cope with the above.

  Next, the operation of the illustrated embodiment will be described.

  When an unforeseen situation (trouble) such as a failure occurs in the work machine 10, the operator 20 uses the operation switch 29 to search the manual description content corresponding to the trouble from the storage device of the control means 58, or By retrieving data from an external server by data communication and projecting it onto the display surface portion 26 of the front window 24 by the projector 27, the operator can quickly cope with the trouble while reading this manual. At this time, the operation switch 29 is operated to turn on / off, change the display page, enlarge / reduce the screen, and the like.

  Also, maintenance information, work schedules, and various other visual information are projected onto the display surface 26 of the front window 24 by the projector 27, so that the operator can obtain the necessary information even during work by operating the work machine 10. Can do.

  For example, when working machine 10 is in operation, if you want to know machine information such as the temperature, pressure, remaining fuel level, and maintenance time of each part of the machine that is the content displayed on the existing main monitor, these machine information is displayed on the front window 24. It is good to display on the display surface part 26. As a result, the existing main monitor can be abolished, or downsized, that is, sub-monitoring limited to display of a minimum necessary warning or the like can be realized.

  Further, as the display content, a work guide screen may be displayed on the display surface portion 26 of the front window 24, and the work may be performed while viewing this. For example, when controlling the position of a work attachment (blade) provided on a work machine, the actual attachment position detected using GPS technology is compared with the target position of a field plan that has been computerized three-dimensionally. In order to achieve the plan, it is preferable to send a signal indicating the operation direction of the work attachment to the display surface portion 26 of the front window 24 and display it graphically or numerically to assist the operator's work operation.

  Furthermore, when the work machine 10 is used as a training vehicle, it is not necessary to prepare a training material if the training content and operation procedure are displayed on the display surface portion 26 of the front window 24 in conjunction with the actual operation.

  Note that visual information such as maintenance information, work schedules, and schedules is easily changed, so as shown in FIG. 3, it was updated by data communication with an external server using functions such as product links and GPS. When an object is displayed on the display surface portion 26 of the front window 24, the operator can obtain the latest visual information while staying in the driver's seat 21.

  Next, automatic display of the trouble response display can reduce the burden on the operator. However, the detailed display during work may interfere with visibility when driving or working. The function of the control means 58 that can be performed will be described with reference to the flowchart shown in FIG. Note that the circled numbers entered in this flowchart are step numbers indicating control procedures.

(Step 1)
The control means 58 always determines whether or not an error code has been issued from each part of the work machine 10.

(Step 2)
When the error code is detected, it is determined whether there is a pressure signal from the pressure switch 57, thereby determining whether the work machine 10 is traveling or working.

(Step 3)
When the work machine 10 is traveling or working (YES in step 2), an error code or other error is displayed at one corner of the display surface section 26. Thereby, the field of view during traveling or working is secured.

(Step 4)
When the work machine 10 is not running or working, it is determined whether or not the hydraulic lock lever 31 is lowered.If the hydraulic lock lever 31 is not lowered, an error display such as an error code is displayed at one corner of the display surface 26. To do.

(Step 5)
When the hydraulic lock lever 31 is lowered (YES in step 4), the lock solenoid valve 51 of the lock device 54 communicates the pilot primary pressure passage 48 with the tank passage 53. Even if the lever 23 and the operating pedal (not shown) are operated incorrectly, no pilot secondary pressure is generated and the control valve 37 is not operated by mistake. Detailed information corresponding to the code is automatically displayed, and the operator can concentrate on troubleshooting while reading the detailed information corresponding to the error code.

  Next, effects of the illustrated embodiment will be described.

  Since the visual information required by the operator 20 in the cab 14 is provided from the projector 27 through the display surface portion 26 formed of a film with different transmittance attached to the front window 24 of the cab 14 of the work machine 10, Even when the work machine 10 is in operation, it is possible to know that an unexpected situation has occurred in the work machine 10 via the display surface portion 26 of the front window 24, and an operator can deal with the unexpected situation. You can get the visual information that 20 needs.

  The display surface portion 26 formed of a film having a different transmittance attached to the front window 24 is easily noticeable to the operator 20 who is working, and can be easily seen while being overlooked.

  The projector 27 provided in the console box 22 does not take a place, and is suitable for displaying visual information at a height position that is easy to see from the operator 20.

  The operator 20 in the cab 14 can know the trouble occurrence by the trouble occurrence display displayed at one corner of the display surface portion 26, and detailed information for dealing with the trouble displayed on the entire surface of the display surface portion 26 can be viewed from the operator 20 view. Since the operation of the work machine 10 in a state where there is a possibility of obstruction is forcibly stopped by the lock device 54, erroneous operation due to poor visibility of the operator 20 can be reliably prevented.

  An operator 20 in the cab 14 can obtain the latest visual information updated by data communication with an external server.

  In this way, conventionally, in order to check and search for materials, the user has been getting out of the driver's seat 21 or the cab 14, but maintenance information, work schedules, and various other visual information are displayed on the front window 24. Even when sitting on the driver's seat 21 or working, the necessary information can be obtained from the display surface portion 26 of the front window 24 and the document can be confirmed.

  In the illustrated embodiment, the work machine display device 25 is applied to the front window 24. However, the work machine display device 25 is a side window (not shown) located on the side of the operator 20. ) May be applied.

It is the cab side view and circuit diagram which show one Embodiment of the display apparatus for working machines which concerns on this invention. It is a front view of a cab equipped with the same display device. It is a system configuration | structure figure of the working machine carrying a display apparatus same as the above. It is a flowchart which shows the automatic display function of a display apparatus same as the above.

Explanation of symbols

10 work machines
21 Driver's seat
22 Console box
24 Front window as transparent window material
25 Display device for work machine
26 Display area
27 projector
54 Locking device
58 Control means

Claims (5)

A display surface portion formed by a film having a different transmittance that is affixed to the transparent window material of the work machine;
A work machine display device comprising: a projector installed on the display surface portion and providing visual information to an operator of the work machine via the display surface portion. The display device for a work machine according to claim 1, wherein the transparent window material is a front window. The work machine display device according to claim 1, wherein the projector is provided in a console box located on one side of the driver's seat. When a trouble occurs in the work machine, a control means is displayed that displays the trouble occurrence in one corner of the display screen, and displays detailed information to deal with the trouble on the entire display screen by starting the lock device that forcibly stops the work machine operation. The work machine display device according to any one of claims 1 to 3, further comprising: The visual information is updated by data communication with an external server. The work machine display device according to any one of claims 1 to 4, wherein the visual information is updated.

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