JP2012167515A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the use of a work machine under the state where a warning is issued.SOLUTION: A work machine includes warning generating means 55 for determining whether it is abnormal or not and generating a warning if it is abnormal, warning storing means 56 for storing warning information on the warning, display means for displaying the warning information stored in the warning storing means 56, and warning pseudo erasing means 57 for erasing the warning information, in which the warning storing means 56 is configured to store warning information on a warning occurring after erasure by the warning pseudo erasing means 57.

Description

  The present invention relates to a work machine such as a backhoe, a tractor, or a combine.

Conventionally, when an abnormality occurs in the work machine in the work machine, the fact that the work machine is abnormal is stored in a control device provided in the work machine (for example, Patent Document 1).
In the display device for a work machine disclosed in Patent Literature 1, when an abnormality occurs in the work machine during operation of the work machine, the abnormality information related to the abnormality is stored in the controller so that the abnormality information can be viewed via the display device. It has become. As described above, in the display device of the work machine, the abnormality information can be stored while the abnormality information stored in the display device can be erased.

JP 2001-95345 A

Now, even if an abnormality occurs during use of the work machine and a warning is generated, if the work machine continues to be used, a heavy load is applied to the work machine. Even in such a situation, in the working machine as shown in Patent Document 1, abnormal information corresponding to a warning is automatically stored. Therefore, if the stored abnormal information is viewed, the working machine is loaded with a great load. You can see that you are using it.
Here, in the display device as shown in Patent Document 1, in order to hide that the user is using the work machine with a great load, abnormality information (warning information) is used by using an erasing function provided in the display device. If it is deleted, the warning information is practically difficult to take out, and it may be difficult for the user to know that he / she used the work machine with a great load.

  In view of the above problems, an object of the present invention is to provide a work machine that can suppress the use of the work machine in a situation where a warning is issued.

The technical means of the present invention for solving this technical problem is characterized by the following points.
In the invention according to claim 1, it is stored in the warning storage means for determining whether or not an abnormality has occurred and generating a warning when it is abnormal, the warning storage means for storing warning information related to the warning, and the warning storage means. It is characterized by comprising display means capable of displaying the warning information and warning pseudo-erasing means for erasing the warning information in a pseudo manner.

The invention according to claim 2 is characterized by comprising pseudo erase time storage means for storing the time when the pseudo erase was performed by the warning pseudo erase means.
In the invention according to claim 3, the warning pseudo-erasing means designates pseudo-erasure designating section for designating warning information to be pseudo-erased, and pseudo-erasing is designated for the warning information designated by the pseudo-erasing designating section. A flag setting unit that sets a pseudo-erasure flag indicating that the warning information is set by the flag setting unit, and a non-display command unit that instructs the display unit not to display the warning information. Features.

The present invention has the following effects.
According to the invention which concerns on Claim 1, it can suppress using a working machine in the condition where the warning has come out.
According to the second aspect of the present invention, it is possible to specify a time when an attempt is made to delete the warning information.

  According to the third aspect of the present invention, the pseudo-erasure process can be easily performed on the warning information stored in the warning storage means.

It is a block diagram of the control system in a working machine. 1 is an overall front view of a display device. It shows an example of information to be displayed when the display device is set to the normal display mode. It is the figure which showed the list of warning codes. An example in which warning information is stored in the storage table of the warning storage means is shown. It is explanatory drawing explaining overwriting of warning information. An example of information to be displayed when the display device is set to a special display mode is shown. It is explanatory drawing when the warning information to be pseudo-erased is automatically set. An example of displaying warning information before and after pseudo erasure is shown. It is explanatory drawing when the warning information to be pseudo-erased is set manually. The whole side view of a working machine is shown.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 11 shows an overall view of the working machine of the present invention. As shown in FIG. 11, in the present invention, the work machine is a backhoe, but it may be a tractor, a combiner, or other work.
First, the overall configuration of the work machine will be described.

As shown in FIG. 11, the work machine 1 includes a lower traveling device 2 and an upper rotating body 3.
The traveling device 2 includes a pair of left and right traveling bodies 4 each having a rubber cover, and a crawler traveling device in which both traveling bodies 4 are operated by a traveling motor M is employed. Further, a dozer 5 is provided at the front portion of the traveling device 2.

  The swivel body 3 includes a swivel base 12 supported on the traveling device 2 via a swivel bearing 11 so as to be able to turn left and right around a swivel axis in the vertical direction, and a working device 13 ( Drilling device). On the swivel base 12, an engine, a radiator, a driver's seat 9, a fuel tank, a hydraulic oil tank, a control valve for controlling hydraulic oil from the hydraulic oil tank, and the like are provided. Around the driver's seat 9, a display device 15 that displays various information regarding the work machine 1 is provided. The driver's seat 9 is surrounded by a cabin 14 provided on the turntable 12.

  The working device 13 includes a swing bracket 17 supported on a support bracket 16 provided at the front portion of the swivel base 12 so as to be offset slightly to the right from the central portion in the left-right direction, and swingable to the left and right around the vertical axis. The boom 18 is pivotally attached to the swing bracket 17 so as to be pivotable about a left-right axis, and is supported so as to be swingable up and down. The arm 19 is pivotally mounted and supported so as to be able to swing back and forth, and a bucket 20 is provided on the distal end side of the arm 19 so as to be capable of squeezing and dumping.

  The swing bracket 17 is swung by expansion and contraction of a swing cylinder provided in the swivel base 12, and the boom 18 is swung by expansion and contraction of a boom cylinder 22 interposed between the boom 18 and the swing bracket 17. The arm 19 is swung by the expansion and contraction of the arm cylinder 23 interposed between the arm 19 and the boom 18, and the bucket 20 is a bucket cylinder 21 interposed between the bucket 20 and the arm 19. Squeezing and dumping is performed by expanding and contracting.

Each cylinder (swing cylinder, boom cylinder 22, arm cylinder 23 bucket cylinder 21) is operated by hydraulic oil whose flow rate is controlled by a control valve.
FIG. 1 is a block diagram of a control system in a work machine.
As shown in FIG. 1, the control system for a work machine includes a main control device 30 that mainly controls the work machine, and a display device 15 arranged separately from the main control device 30. The main control device 30 and the display device 15 can transmit and receive data via a vehicle communication network N such as a controller area network (CAN communication). The vehicle communication network may be anything as long as the main control unit 30 and the sub control unit 31 can transmit and receive data, and may be a FlexRay or another network.

The main control device 30 is composed of a CPU and the like, and can control various devices (traveling device, working device, etc.) provided in the work machine 1.
For example, the main control device 30 can perform traveling second speed control, unload switching control, starter switching control, anti-theft control, and the like.
The traveling 2 speed control is a control for switching the traveling apparatus 2 between a high speed and a low speed based on an ON / OFF input signal from a traveling 2 speed switch 32 that switches the traveling apparatus 2 between a high speed and a low speed. In the unload switching control, the hydraulic oil discharged from the pump can be supplied to the control valve and cannot be supplied based on an ON / OFF input signal from a lever lock switch 33 provided on the side of the driver's seat 9. This is control to switch. The starter switching control is a control for switching the starter relay 35 based on an on or off input signal from the starter switch 34. The anti-theft control permits the starter relay 35 to be turned on from off when the ID code built in the engine key for starting the engine and the ID code built in the main control device 30 are verified. In this control, the starter relay 35 is not permitted to be turned on from off when collation is not established. The anti-theft means is provided with a registration function for registering a new engine key ID code in the main controller 30. The main control device 30 may be any device that controls various devices, and is not limited to the exemplified control.

The main controller 30 is connected to a plurality of detectors 40 that detect various states of the work implement with sensors or the like.
Specifically, the main control device 30 includes an engine rotation sensor (engine rotation detector) 40a that detects the engine speed, a water temperature sensor (water temperature detector) 40b that detects the water temperature, and fuel (remaining amount). Is connected to a fuel sensor (fuel detector) 40c. That is, the state detected by the detector 40 such as the engine rotation sensor 40a, the water temperature sensor 40b, and the fuel sensor 40c is input to the main control device 30. The main control device 30 is also supplied with an engine key ID code for starting the engine, a battery voltage, and the like.

When various pieces of detection information such as engine speed, fuel, and water temperature are input to the main control device 30, the main control device 30 transmits the respective detection information (actual measurement values) to the display device 15 for vehicle communication. The data is transmitted to the display device 15 via the network N. Further, the main control device 30 determines whether an abnormality has occurred in the work implement 1 based on the detection information (engine speed, fuel, water temperature, etc.) acquired from the detector 40 and determines that it is abnormal. When a warning is generated, information about the warning (called warning information) is stored (saved), or the warning information is transmitted to the display device 15 so that the warning information can be displayed on the display device 15. It is like that.

Hereinafter, the display device 15 and the main control device 30 will be described in detail.
As shown in FIG. 2, the display device 15 includes a display unit 41 that can display various information, and a control unit 31 that controls the display unit 41.
Specifically, when the display device 15 is viewed from the front, twelve single LED display portions 41A are provided on the left side of the display device 15, a segment type display portion 41B is provided on the lower side, and on the right side. Two pointer-type display portions 41C arranged in the vertical direction are provided.

Each single-type LED display unit 41A (sometimes referred to as LED display unit 41A) displays detection information itself and warning information by turning on, turning off, and blinking LED elements.
Specifically, the LED display unit 41A provided in the display device 15 includes a traveling LED display unit 41A1, a registration LED display unit 41A2, a forgetting to remove LED display unit 41A3, a fuel LED display unit 41A4, and a water temperature LED display unit. 41A5, warning LED display 41A6, and the like.

  The traveling LED display 41A1 is lit when the work implement 1 is in a high-speed traveling state. The registration LED display section 41A2 is lit when an engine key is inserted into a cylinder when registering an ID code with the registration function (lights up to notify the timing of insertion). The forgetting to remove LED display portion 41A3 is lit when notifying that the engine key has been forgotten to be removed under the condition that the engine key inserted into the cylinder at the time of registration of the ID code has been inserted for a long time. The fuel LED display 41A4 blinks when the fuel is in shortage. The LED display section 41A5 for water temperature blinks when the water temperature becomes abnormal or when the water temperature sensor 40b becomes abnormal and a warning is issued. The warning LED display 41A6 blinks when a warning is issued due to some abnormality in the work machine 1. In addition, the LED display portion 41A of the display device 15 includes an AUX LED display portion 41A7, a time adjustment LED display portion 41A8, a blow LED display portion 41A9, etc., but the description thereof is omitted.

The segment type display unit 41B displays various information by turning on or off the plurality of segments 42. The segment type display unit 41B is composed of 48 segments 42 (segment elements).
Specifically, in the segment type display unit 41B, five segment groups 43 (referred to as seven segments) each including seven segments 42 are arranged in the left-right direction, and characters (Y, M, D) are arranged around the seven segments 43. , AM, PM) and nine segments composed of symbols (Δ) are arranged, and four segments composed of dots (:,.) Are arranged between seven segments 43. . The 7 segment 43 is for displaying numbers, characters, symbols, and the like. The segments of the characters and symbols arranged around the 7 segment 43 are used for instructing screen operations and on what screen. It is supplementary as you can see.

FIG. 3 shows an example of information displayed on the segment type display unit 41B.
As shown in FIG. 3, after the cylinder is turned with the engine key to supply power to the display device 15, when the first switch 50 connected to the display device 15 is pressed, the segment type display unit 41B has an hour meter ( (Cumulative time) is displayed.
The hour meter is an accumulated time that the manufacturer of the work machine 1 drives the work machine 1 after shipping the work machine 1 and is stored in the main control device 30 or the display device 15. It has become.

Next, when the second switch 51 connected to the display device 15 is pressed separately from the first switch 50 in a state where the accumulated time (hour meter) is displayed on the segment type display unit 41B, the segment type display unit 41B. The information to be displayed is switched, and the current time is displayed on the segment type display unit 41B.
When the second switch 51 is pressed while the time is displayed on the segment type display unit 41B, the engine speed is displayed on the segment type display unit 41B. Further, when the second switch 51 is pressed while the engine speed is displayed on the segment type display unit 41B, the warning code N of the warning generated in the work machine 1 is displayed on the segment type display unit 41B. Is done. When a plurality of warnings are generated on the work machine 1, warning codes N are displayed in order. If no warning has occurred, the warning code N is not displayed.

That is, when the cylinder is turned with the engine key, the display device 15 is in the normal display mode, and the hour meter, time, engine speed, and warning can be displayed in order on the segment type display unit 41B.
As shown in FIG. 2, the pointer-type display unit 41 </ b> C includes a needle unit 45 that rotates at a predetermined angle with respect to the center of rotation, and a gauge display unit 46 that overlaps the needle unit 45. Various information is displayed depending on the position of the tip of the needle 45 relative to the gauge display 46.

For example, when the display device 15 is viewed from the front, a fuel pointer type display unit 41C1 is provided on the upper side, and a water temperature pointer type display unit 41C2 is provided on the lower side of the fuel pointer type display unit 41C1. .
The fuel pointer type indicator 41C1 indicates that the fuel is full when the tip of the needle 45 points to the upper end of the gauge indicator 46, and the fuel is insufficient when the lower end of the gauge indicator 46 is indicated. Indicates that it is (lost).

The water temperature pointer type indicator 41C2 indicates that the water temperature is high when the tip of the needle portion 45 points to the upper end of the gauge indicator 46, and indicates that the water temperature is low when the lower end of the gauge indicator 46 is indicated. .
The control unit 31 of the display device 15 transmits / receives data (information) between the main control device 30 and the display device 15 and causes the display unit 41 to display various pieces of input information (detection information, warning information). Control, and includes a CPU, a general-purpose IC, and the like. Further, the “normal display mode” and the “special display mode” in the display device 15 are incorporated in the main control device 30 even if they are executed by the control program incorporated in the control unit 31 of the display device 15. It may be a control program.

Next, the main controller 30 will be described in detail.
The main control device 30 includes warning generation means 55 and warning storage means 56. The warning generation means 55 is configured by a program stored in the main control device 30.
The warning generating means 55 determines whether or not the work implement 1 is abnormal based on detection information detected by the detector 40, and generates a warning when it is determined that it is abnormal.

  As shown in FIG. 4, for example, the warning generating means 55 has a detected engine speed of a predetermined rotation or higher (for example, 700 rpm) and a detected water temperature of a predetermined temperature or higher (for example, 120 ° C. or higher). Furthermore, when the work machine 1 continues for a predetermined time or longer (for example, 1 second or longer), it is determined that the work machine 1 is abnormal (overheat), and a warning of overheat is generated.

The warning generating means 55 generates a warning when an abnormality such as a CAN communication abnormality, a fuel sensor disconnection abnormality, or a water temperature sensor disconnection abnormality occurs.
The CAN communication abnormality is, for example, an abnormality in which the CAN communication with the display device 15 cannot be performed normally although the main control device 30 is operating normally.
The fuel sensor disconnection abnormality is an abnormality in which the resistance value detected by the fuel sensor 40c is equal to or greater than a predetermined value and the resistance value is very large, and the fuel sensor 40c and the main control device 30 are considered to be disconnected. The water temperature sensor disconnection abnormality is an abnormality in which the resistance value detected by the water temperature sensor 40b is equal to or greater than a predetermined value, the resistance value is very large, and the water temperature sensor 40b and the main control device 30 are considered to be disconnected.

The warning generation means 55 outputs a warning code N (warning type) as shown in FIG. 4 so that each warning (abnormality) can be identified when the warning is generated.
The warning code N regarding CAN communication abnormality is “01”, the warning code N regarding overheating is “15”, the warning code N regarding fuel sensor disconnection abnormality is “17”, and the warning code N regarding water temperature sensor disconnection abnormality is “18”.

For example, the warning generating means 55 outputs a warning code “01” corresponding to the CAN communication abnormality when a CAN communication abnormality occurs, or outputs a warning code “15” corresponding to the overheating when the overheating occurs. Output.
That is, the warning generation unit 55 determines whether the work implement 1 is abnormal using various information input to the main control device 30. A warning code N corresponding to is generated. Needless to say, the warning generated by the warning generation unit 55 is not limited to the above-described example, and may be any warning.

  The warning storage means 56 is composed of, for example, a non-volatile memory (for example, flash memory) and stores information related to warning (warning information). The warning storage means 56 stores at least the warning code N (warning type) of warning and the time when the warning occurs in correspondence. In the following description, the warning code N is used to identify (distinguish) warning information.

As shown in FIG. 5, the warning storage means 56 has a storage table for storing the contents of warning information separately for each warning code N. That is, a storage table is assigned to each warning.
Further, each storage table is divided into an initial hour meter unit, an initial time unit, an after-erasure hour meter unit, a post-erase time unit, a final hour meter unit, a final time unit, a count unit, and a cumulative count unit.

  The initial hour meter section warns the accumulated time (hour meter) at the time of occurrence of the warning when the warning corresponding to the warning code N is generated for the first time after the work machine 1 is shipped from the manufacturer that manufactures the work machine 1. It is a part that is stored as information. The initial time portion is a portion that stores the time (occurrence time) when the warning is generated as warning information when the warning corresponding to the warning code N is generated for the first time after the work machine 1 is shipped from the manufacturer.

For example, it is assumed that overheating occurs for the first time after the work machine 1 is shipped, the accumulated time (hour meter) at the time of warning is 100 hours (100h), and the occurrence time is March 2, 2009.
At this time, the warning storage means 56 stores “100 hours”, which is an accumulated time when an overheat warning is generated for the first time, in the initial hour meter unit corresponding to the overheat, and “2009 when the overheat occurs. “March 2” is stored in the initial time portion corresponding to overheating. For convenience of explanation, the warning information stored in the initial hour meter portion may be referred to as initial cumulative time, and the warning information stored in the initial time portion may be referred to as initial occurrence time.

As will be described later, the after-erasure hour meter section newly generates a warning after the warning information is pseudo-erased from the warning storage means 56 by the warning pseudo-erasing means 57 (after pressing an erase switch described later). In this case, the accumulated time (hour meter) at the time when a new warning occurs is stored as warning information.
The post-erase time section uses the warning generation time as warning information when a warning is newly generated after the warning information is pseudo-erased by the warning pseudo-erasing means 57 (after pressing an erase switch described later). The part to remember.

For example, it is assumed that after the warning information is pseudo-erased, a new overheat occurs, the accumulated time at that time is 140 hours (140 h), and the occurrence time is July 6, 2009.
At this time, the warning storage means 56 stores the accumulated time “140 hours” in the post-erase hour meter unit corresponding to overheating, and overheats “July 6, 2009”, which is the time when overheating occurred. Store in the corresponding post-erase time portion.

Note that once pseudo erasure is performed, the warning storage means 56 overwrites and updates the accumulated time stored in the hour meter portion after erasure, and also overwrites the time stored in the time portion after erasure. For convenience of explanation, the warning information stored in the hour meter portion after erasure may be referred to as an intermediate cumulative time, and the warning information stored in the time portion after erasure may be referred to as an intermediate occurrence time.
The final hour meter unit is a part that stores the accumulated time (hour meter) at the time of warning as warning information when the latest warning occurs. The last time part is a part that stores the time when the latest warning occurs as warning information.

As shown in FIG. 6A, for example, “100 hours” that is the accumulated time is already stored in the final hour meter portion, and “March 2, 2009” that is the time is already stored in the final time portion. In this case, it is assumed that a warning is subsequently issued with the same warning code N on July 6, 2009, and the accumulated time at that time is 140 hours.
At this time, the warning storage means 56 overwrites and stores “140 hours”, which is the accumulated time, in the final hour meter portion, and stores “July 6, 2009”, which is the time that occurred in the final time portion, as the final time portion. Overwrite and memorize. As a result, the warning information stored in the warning storage means 56 changes from the state shown in FIG. 6 (a) to the state shown in FIG. 6 (b).

For convenience of explanation, the warning information stored in the final time portion may be referred to as the latest accumulated time, and the warning information stored in the final time portion may be referred to as the latest occurrence time.
The count unit is a part that stores the number of times a warning has occurred (number of occurrences) as warning information. For example, every time an overheat warning is repeatedly generated, the number of occurrences of the warning is counted up, and the warning storage means 56 stores the number of occurrences by overwriting in the counting unit every time the number is counted up.

The cumulative count unit is a part that stores the cumulative number of occurrences of warnings for the same warnings after shipping the work machine 1 from the manufacturer. For convenience of explanation, the warning information stored in the count unit may be referred to as an intermediate occurrence count, and the warning information stored in the cumulative count unit may be referred to as an accumulated occurrence count.
As described above, the warning storage means 56 stores eight types of warning information (initial cumulative time, initial occurrence time, intermediate cumulative time, intermediate occurrence time, latest cumulative time, latest occurrence time, intermediate in a storage table defined for each warning type. The number of occurrences and the cumulative number of occurrences) are stored.

Now, various warning information stored in the warning storage means 56 can be displayed when the display device 15 is set to the special display mode instead of the normal display mode described above. That is, the display device 15 can be operated as a display unit that displays the warning information stored in the warning storage unit 56.
For example, when a special operation is performed (for example, the cylinder is rotated with the engine key while pressing the first switch 50) rather than the operation performed by the normal working machine of rotating the cylinder with the engine key, the display device 15 is in the normal display mode. To the special display mode.

Then, as shown in FIG. 7, after the display device 15 is set to the special display mode, the second switch 51 is pressed for a few seconds to set the display device 15 to the “warning history mode” in the “special display mode”. When the second switch 51 is pressed for a long time after the warning history mode is set, first, the warning code N of warning information is displayed on the segment type display unit 41B (warning code display screen).
This warning code display screen is a screen for selecting which warning to display from among a plurality of warnings. When the second switch 51 is pressed and held for a few seconds on the warning code display screen, the warning code N is changed. be able to. In other words, on the warning code display screen, it is possible to set which storage table of warning information is to be read from the warning storage means 56 for each warning type.

When the second switch 51 is pressed while the warning code display screen is displayed, the intermediate occurrence count (warning information stored in the count unit) is read from the storage table corresponding to the warning code N to the display device 15. The number of intermediate occurrences (warning information stored in the counting unit) is displayed on the segment type display unit 41B.
Subsequently, when the second switch 51 is pressed, the initial accumulated time (warning information stored in the initial hour meter unit) is read from the storage table corresponding to the warning code N to the display device 15 and is initially displayed in the segment type display unit 41B. The accumulated time is displayed.

  Further, when the second switch 51 is pressed, the initial occurrence time (warning information stored in the initial time portion) is read from the storage table corresponding to the warning code N, and a part of the initial occurrence time ( Next, when the second switch 51 is pressed, a part of the initial occurrence time (month and day) is displayed. In this way, each time the second switch 51 is pressed, the warning information is sequentially read from the storage table and displayed on the segment type display unit 41B.

  Even after the initial generation time is read out from the storage table, every time the second switch 51 is pressed, the intermediate cumulative time, the intermediate generation time, the latest cumulative time, and the latest generation time are read out, and the segment type display unit 41B. Each time the second switch 51 is pressed, each warning information is read from the storage table. However, when the warning code N is displayed on the warning code display screen, the warning information in the storage table corresponding to the warning code N is displayed. The information may be read out in a lump and temporarily stored, and thereafter, each time the second switch 51 is pressed, the warning information may be sequentially displayed on the segment type display unit 41B.

As described above, a large amount of warning information is stored in the warning storage means 56 for each warning code N.
In this way, a large amount of warning information is stored in the warning storage means 56, but the work machine 1 (main control device 30) pseudo-erases the warning information stored in the warning storage means 56. The warning pseudo-erasing means 57 is provided.

The warning pseudo erasure means 57 is configured by a program stored in the main control device 30.
Hereinafter, the warning pseudo-erasing means 57 will be described in detail.
The warning pseudo erasure means 57 does not erase the warning information in the warning storage means 56 by logically erasing the warning information stored in the warning storage means 56, but only makes it appear as if the warning information has been deleted. In reality, the warning information in the warning storage means 56 is processed so that it can be easily taken out without being erased. Specifically, the warning pseudo-erasing unit 57 allows the warning information before the pseudo-erasing to be displayed on the display device 15 to show that the warning information stored in the warning storage unit 56 is saved. Thus, the warning information after pseudo erasure is not displayed on the display device 15 so that the warning information stored in the warning storage means 56 is displayed as if it was erased.

In this embodiment, the warning pseudo-erasing means 57 can be operated (activated) by performing the following processing. A pseudo erasure designation unit 60, a flag setting unit 61, and a non-display command unit 62, which will be described later, are configured by a control program or the like.
First, as shown in FIG. 7, the second switch 51 is pressed for a few seconds to set the display device 15 to the “history deletion mode” in the “special display mode”. When the second switch 51 is pressed for a few seconds after the display device 15 is set to the history erasing mode, the warning pseudo erasing means 57 is activated. At this time, the second switch 51 serves as an erase switch for performing pseudo erase. When the warning pseudo-erasure means 57 is activated by pressing the erase switch 51, the pseudo-erasure time storage unit 58 provided in the warning pseudo-erasure means 57 performs the time when the erase switch 51 is pressed, that is, pseudo erase. The start time is stored in the warning storage means 56 so as not to be erased.

  Here, when the warning pseudo-erasure means 57 is activated by pressing the second switch 51, warning information to be automatically erased is designated by the pseudo-erasure designation unit 60 provided in the warning pseudo-erasure means 57. Specifically, when the erase switch 51 is pressed, the pseudo erasure designation unit 60 includes an intermediate accumulated time other than the initial accumulated time, the initial occurrence time, and the accumulated occurrence number among the warning information stored in the warning storage unit 56. The intermediate occurrence time, the latest accumulated time, the latest occurrence time, and the number of intermediate occurrences are automatically designated as pseudo erase.

  For example, as shown in FIG. 8A, the initial accumulated time is “100h”, the initial occurrence time is “2/3/2009”, the intermediate accumulated time is “140h”, and the intermediate occurrence time is “6”. / 7/2009 ", the latest accumulated time" 140h ", the latest occurrence time" 6/7/2009 ", the intermediate occurrence number" 1 ", and the accumulated occurrence number" 13 " 56.

  Here, as shown in FIG. 8B, the pseudo erasure designation unit 60 determines that the intermediate accumulated time is “140h”, the intermediate occurrence time is “6/7/2009”, and the latest accumulated time is “140h”. The latest occurrence time “6/7/2009” and the intermediate occurrence frequency “1 time” are the targets of pseudo-erasure. In the history erasure mode, the pseudo erasure designation unit 60 does not set warning information to be pseudo erased for each warning type (designates warning information to be pseudo erased for each storage table) but exists in all the storage tables. Pseudo erasure is set for intermediate accumulation time, intermediate occurrence time, latest accumulation time, latest occurrence time, and number of intermediate occurrences.

  Next, for the warning information (intermediate cumulative time, intermediate occurrence time, latest cumulative time, latest occurrence time, intermediate occurrence count) for which pseudo-erasure is designated by the flag setting unit 61 provided in the warning pseudo-erasure means 57 A pseudo erase flag F indicating that pseudo erase is designated is set. As shown in FIG. 8B, the flag setting unit 61 associates the warning information set by the pseudo erasure designation unit 60 with the pseudo erasure flag F, and then stores the warning information in the warning storage means 56 (storage table). The warning information with the pseudo erase flag F is saved.

Thus, when the pseudo erasure flag F is attached to the warning information, the warning pseudo erasure means 57 is activated when the warning information is displayed in the special display mode.
As described above, when the display device 15 is set to the “warning history mode” in the “special display mode”, the warning pseudo-erasing means 57 is activated. Here, when the pseudo-erasure is not performed by the pseudo-erasure means 57, the warning information is displayed in order by pressing the second switch 51 in order, but the pseudo-erasure flag F is set by the flag setting unit 61. When set, the non-display command unit 62 provided in the pseudo erasure means 57 instructs the display device 15 not to display the warning information for which the pseudo erasure flag F is set, and the warning information is not displayed. .

  That is, when displaying the warning information on the display device 15, the non-display command unit 62 displays the warning information in which the pseudo erase flag F is set among the warning information stored in the warning storage unit 56. Even if the display device 15 reads the warning information set with the pseudo-erasure flag F so that the warning information set with the pseudo-erasure flag F cannot be displayed on the display device 15 or is not read into the display device 15. The warning information for which the deletion flag F is set is not displayed.

  For example, in the above-described example, as shown in FIG. 9A, before the pseudo erasure, the initial cumulative time, the initial generation time, the intermediate cumulative time, the intermediate generation time, the latest cumulative time, the latest generation time, the intermediate generation number, Although the cumulative number of occurrences can be displayed on the display device 15, as shown in FIG. 9B, after the pseudo erase, the intermediate cumulative time, the intermediate occurrence time, and the latest cumulative are set for the pseudo erase flag F. The time, the latest occurrence time, and the number of intermediate occurrences are not displayed by the non-display command unit 62, and when the display device 15 is viewed, it appears as if the warning information has been deleted.

  As described above, according to the working machine of the present invention, since the warning pseudo-erasing means 57 for pseudo-erasing the warning information is provided, for example, the user or the like places the display device 15 in the “special display mode”. When the warning information is erased by the history erasing mode in the “history erasing mode”, the warning information erased by the history erasing mode is not displayed on the display device 15, and at first glance, the warning information in the warning storage means 56 is erased. I can think it was possible. However, in practice, the deleted warning information is stored in the warning storage means 56 and is not deleted, and the warning information can be extracted.

For example, even if the user deletes the warning information using the history deletion mode in order to intentionally hide that the user has used the work machine 1 in a state where the warning is generated, the warning is actually Since the information remains, it is possible to prevent the work machine 1 from being used while generating a warning.
Since the warning pseudo-erasure means 57 does not perform logical or physical erasure of the warning information, the warning information stored in the warning storage means 56 can be easily extracted. The warning information can be extracted (output) by any method. For example, a personal computer or the like can be connected to the main control unit 30 or the display device 15, and the warning information is stored in the warning storage unit 56 using these. The warning information may be extracted to the outside, or may be extracted by connecting an external flash memory to the main control unit 30 or the display device 15.

  The warning pseudo-erasure means 57 is a pseudo-erasure designation unit 60 for designating warning information to be pseudo-erased, and pseudo-erase indicating that pseudo-erasure is designated for the warning information designated for pseudo-erasure by the pseudo-erasure designation unit 60 A flag setting unit 61 that sets the flag F, and a non-display command unit 62 that instructs the display device 15 not to display the warning information for which the pseudo erasure flag F is set by the flag setting unit 61 are provided. Therefore, it is possible to easily perform pseudo-erasure processing on the warning information stored in the warning storage unit 56.

In the above-described embodiment, when the history deletion mode is set, predetermined warning information among a plurality of warning information is automatically set by the pseudo deletion specifying unit 60. Warning information to be pseudo-erased may be set.
FIG. 10 shows a list of warning information displayed on the display device 15. As shown in FIG. 10, when performing pseudo-erasure on the display device 15, the pseudo-erasure designation unit 60 displays each warning information and sets whether or not to erase at a position corresponding to the warning information. The setting column A to be displayed can be displayed.

The user operates the second switch 51 and the like to add the symbol “L” to the setting field A displayed on the screen of the display device 15 so that the warning information to be deleted can be selected. When the user selects warning information to be deleted from the list of warning information and decides to delete by the deletion switch 51, the flag setting unit 61 adds a setting flag F to the warning information selected to be deleted. , Stored in the warning storage means 56.

As can be seen, the user thinks that the selected warning information has been erased, but in fact, even if such an operation is performed, the warning information will remain, so that the user conceals the occurrence of the warning. It is possible to stop the act of erasing or forcibly using the work machine 1 in a state where a warning is generated.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  In the embodiment described above, the warning generation means 55, the warning storage means 56, and the warning pseudo erasure means 57 are provided in the main control device 30, but the warning generation means 55, the warning storage means 56, and the warning pseudo erasure means 57 are It may be provided anywhere on the work machine 1. For example, the warning generation means 55, the warning storage means 56, and the warning pseudo erasure means 57 may be provided in the display device 15, or these may be provided in any of the control devices that control the work machine 1. .

In the above-described embodiment, the display device 15 includes the LED display unit 41A, the segment type display unit 41B, and the pointer type display unit 41C. It may be provided with a liquid crystal display unit for display, or may display information in other display formats.
In the embodiment described above, after pseudo-erasure, as shown in FIG. 9B, only the warning information that has been pseudo-erased is not displayed on the display device 15. “No history” may be displayed to notify the user as if the history has been deleted.

15 Display device (display means)
31 Control Unit 55 Warning Generation Unit 56 Warning Storage Unit 57 Warning Pseudo Erase Unit 60 Pseudo Erase Designation Unit 61 Flag Setting Unit 62 Non-Display Command Unit

Claims (3)

  Warning generation means for determining whether or not there is an abnormality and generating a warning when it is abnormal, warning storage means for storing warning information related to the warning, and display capable of displaying the warning information stored in the warning storage means And a warning pseudo erasing means for erasing the warning information in a pseudo manner.   2. The work machine according to claim 1, wherein the warning pseudo-erasing unit includes a pseudo-erasing time storage unit that stores a time when the pseudo-erasing is performed by the warning pseudo-erasing unit.   The warning pseudo-erasure means sets a pseudo-erasure designation section for designating warning information to be pseudo-erased and a pseudo-erasure flag indicating that pseudo-erasure is designated for the warning information designated for pseudo-erasure by the pseudo-erasure designation section. And a non-display command unit that instructs the display unit not to display the warning information for which the pseudo erasure flag has been set by the flag setting unit. The working machine described in.