Construction machinery

Abstract

[Problem] To provide a construction machine with which an attachment can be used safely. [Solution] A construction machine 1 comprises: a work machine 4 mounted on a machine body; an attachment 43 operably mounted on the work machine 4; an operation control means 51 for controlling the operation of the attachment 43; an information acquisition means 52 for acquiring operation information of the attachment 43; and a notification means 53 for performing notification of an operation state related to hazardous operation of the attachment 43, such notification being on the basis of the operation information acquired by the information acquisition means 52.

Description

Technical Field

[0001] The present invention relates to a construction machine that can be operated by attaching an attachment.

Background Art

[0002] Conventionally, a construction machine is equipped with a working device composed of a boom, an arm, a bucket, etc., and can perform excavation work with the bucket. Further, the construction machine can perform work peculiar to each attachment by attaching another attachment to the working device instead of the bucket. Some construction machines monitor and display their operating status.

[0003] For example, the attachment operation monitoring device disclosed in Patent Document 1 includes an arithmetic unit that calculates the operating pressure and operating time of a hydraulic drive device (attachment). During the use of the working machine, the arithmetic unit calculates the average operating pressure and continuous operating time of the hydraulic drive device based on the operating pressure and operating time, and controls the lighting state of the operation display lamp according to the calculated average operating pressure and continuous operating time.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional construction machines, attachments can be attached to the machine body to add new functions, so they are highly convenient and frequently used. By the way, since the use of attachments is sometimes dangerous, skilled experience is required. Therefore, in construction machines, it is required that even beginners can use attachments safely. However, in conventional construction machines and the attachment operation monitoring device of Patent Document 1 described above, although it is possible to notify and optimize the setting of the hydraulic pressure for driving the attachment, it is not possible to notify and optimize the usage state of the attachment to promote safe use.

[0006] An object of the present invention is to provide a construction machine that can use an attachment safely.

Means for Solving the Problems

[0007] In order to solve the above problems, a construction machine of the present invention includes a working machine attached to a machine body, an attachment attached to the working machine and operable, an operation control means for controlling the operation of the attachment, an information acquisition means for acquiring operation information of the attachment, and a notification means for notifying an operation state related to a dangerous operation of the attachment based on the operation information acquired by the information acquisition means.

Effects of the Invention

[0008] According to the present invention, it is possible to provide a construction machine that can use an attachment safely.

Brief Description of the Drawings

[0009]

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MODE FOR CARRYING OUT THE INVENTION

[0010] The construction machine 1 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the construction machine 1 of the present embodiment.

[0011] The construction machine 1 is used, for example, at a construction site, a demolition site, a mine, etc., and performs operations such as civil engineering work and construction work according to the operation of an operator. In the present embodiment, the construction machine 1 is composed of a hydraulic excavator that performs operations such as earth and sand excavation work. The construction machine 1 includes a lower traveling body 2, an upper revolving body 3, and a working machine 4, and is configured as a work vehicle in which the upper revolving body 3 and the working machine 4 are rotatably provided above the lower traveling body 2.

[0012] The lower traveling body 2 includes a pair of left and right crawlers 21 and a truck frame 22. Further, a blade 24 is attached to the lower traveling body 2 via a blade arm 23. The pair of crawlers 21 receive power from the engine 31 of the upper revolving body 3 and are driven to perform traveling and the like of the construction machine 1. The truck frame 22 is provided between the pair of crawlers 21 and rotatably supports the upper revolving body 3. The blade arm 23 supports the blade 24, and the blade 24 functions as a spoil board.

[0013] The upper revolving body 3 includes an engine 31, a counterweight 32, and a cabin 33. Inside the cabin 33, a driver's seat for an operator to sit, a display device 34 for displaying various information, an operating device 35 for the operator to operate, etc. are installed (see FIG. 2). The display device 34 displays a home screen 70 according to the operation of the construction machine 1, and displays various screens according to the operation of the operating device 35.

[0014] The operating device 35 receives operations for the traveling of the construction machine 1 and the slewing of the upper slewing body 3, operations for the work of the working machine 4, etc. For example, the operating device 35 includes a working machine operating means that receives the turning operations of the boom 41, the arm 42, and the attachment 43 of the working machine 4. When the operating device 35 is attached with an attachment 43 driven by a power take-off (PTO) to the working machine 4, the operating device 35 includes an attachment operating means that receives the PTO operation of the attachment 43. The working machine operating means and the attachment operating means of the operating device 35 output an operation signal corresponding to the operation to the control unit 5.

[0015] The working machine 4 performs various operations such as earth and sand excavation work and crushing work according to the operations of the operator. The working machine 4 is attached to the upper slewing body 3 and is composed of a boom 41, an arm 42, and an attachment 43 such as a bucket for excavation work. The construction machine 1 is driven by the hydraulic power of the hydraulic oil for the working machine 4 and includes a hydraulic actuator (not shown) that drives the boom 41, the arm 42, and the attachment 43. The construction machine 1 uses the power generated by the engine 31 to supply hydraulic oil from a hydraulic oil tank (not shown) to the hydraulic actuator by a hydraulic pump (not shown), and drives the hydraulic actuator using the hydraulic oil pressurized by the hydraulic pump as a power transmission medium.

[0016] The boom 41 is provided so as to be rotatable by hydraulic drive with respect to the machine body composed of the lower traveling body 2 and the upper slewing body 3. For example, the boom 41 has a base end near the lower part of the upper slewing body 3, extends with the base end as a fulcrum, and is configured to rotate up and down.

[0017] The arm 42 is attached to the tip of the boom 41 and is provided so as to be rotatable by hydraulic drive with respect to the boom 41. For example, the arm 42 has a base end near the tip of the boom 41, extends with the base end as a fulcrum, and is configured to rotate up and down.

[0018] The attachment 43 is detachably attached to the tip of the arm 42. For example, the bucket, which is the attachment 43, is provided so as to be rotatable up and down by hydraulic drive. The construction machine 1 usually attaches a bucket as the attachment 43, but depending on the type of work, other members such as a breaker 43a for crushing work, a fork, a grapple, a cutter, a crusher, a packer, a rake, a clam shell, etc. can be attached. In the present embodiment, an example will be described in which the construction machine 1 attaches a breaker 43a that performs a striking operation as an attachment 43 driven by a power take-off (PTO). The breaker 43a includes a rod 43b extending in the vertical direction, and performs a striking operation by vibrating the rod 43b up and down by the PTO.

[0019] Also, as shown in FIG. 2, the construction machine 1 includes a control unit 5 and a storage unit 6. The control unit 5 is composed of a CPU or the like and controls the operations of each part of the construction machine 1. For example, the control unit 5 inputs the operation signals output from the work machine operation means and the attachment operation means of the operation device 35, and controls each part according to the operation signals. The storage unit 6 is composed of a storage medium such as a ROM or a RAM, and stores programs and data for controlling each part and each function of the construction machine 1.

[0020] The control unit 5 controls each part and each function of the construction machine 1 by executing arithmetic processing based on the programs and data stored in the storage unit 6. For example, the control unit 5 functions as an operation control means 51, an information acquisition means 52, and a notification means 53 by executing a program, and monitors whether the work by the attachment 43 of the work machine 4 is appropriate. Further, the control unit 5 functions as an information determination means 54 (determination means) for determining a dangerous operation of the attachment 43 based on the operation information acquired by the information acquisition means 52.

[0021] Note that the construction machine 1 may be provided with attachment identification means such as a sensor or mechanism capable of identifying the type of the attachment 43 on the working machine 4. In this case, when the attachment 43 is attached, the attachment identification means automatically identifies the type of the attachment 43, and the control unit 5 inputs the type of the attachment 43 from the attachment identification means and stores it in the storage unit 6. Alternatively, the construction machine 1 may be configured to receive an input operation of the type of the attachment 43 by the operation device 35. In this case, the control unit 5 stores the type of the attachment 43 input via the operation device 35 in the storage unit 6.

[0022] The operation control means 51 controls the operations of the boom 41, the arm 42, and the attachment 43 of the working machine 4 according to the operation of the operation device 35 by the operator. Further, when the operation of the attachment 43 is dangerous or approaching danger based on the operation information of the attachment 43 acquired by the information acquisition means 52, the operation control means 51 stops or suppresses and restricts the operation of the attachment 43. For example, the operation control means 51 reduces the PTO output to suppress the operation of the attachment 43. Specifically, it decelerates the striking speed of the breaker 43a or reduces the amplitude.

[0023] The information acquisition means 52 acquires the operation information of the attachment 43 while the attachment 43 is operating or before operating the attachment 43.

[0024] The notification means 53 notifies the operation state regarding the dangerous operation of the attachment 43 based on the operation information of the attachment 43 acquired by the information acquisition means 52. For example, the notification means 53 notifies the operation state by screen display by the display device 34, lighting or flashing of the warning lamp, voice output, etc. The notification means 53 can notify the determination result by the information determination means 54 regarding the dangerous operation of the attachment 43 as the operation state.

[0025] Next, a first embodiment of the monitoring operation of the attachment 43 in the construction machine 1 will be described. In the construction machine 1, when driving an attachment 43 such as a breaker 43a by PTO, if the impact is continuously applied for a predetermined limit time (for example, 30 seconds) or more, abnormal friction of the rod 43b of the breaker 43a or an increase in the oil temperature of the hydraulic oil may occur, and the attachment 43 may malfunction. Therefore, in the first embodiment, the construction machine 1 detects continuous impacts of the breaker 43a, which is the attachment 43, for a time longer than the limit time as a dangerous operation.

[0026] In this case, the information acquisition means 52 functions as a timing means that measures the operation time of the attachment 43 and acquires it as operation information. The operation time of the attachment 43 is the time while the attachment 43 is being driven by the PTO, and the timing means executes (starts) the measurement of the operation time, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0027] The notification means 53 notifies the operation state of the attachment 43 based on the operation time measured by the timing means as the operation information of the attachment 43. The notification means 53 executes (starts) the notification of the operation time, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0028] For example, on the home screen 70 of the display device 34, in the case of a normal operation of driving an attachment 43 such as a bucket hydraulically, the working status is indicated in the working status column 71, while in the case of a PTO operation of driving an attachment 43 such as a breaker 43a by PTO, the operation state based on the operation time is displayed. As shown in FIG. 3, the notification means 53 displays the type information 72 indicating the type of the attachment 43, the operation time information 73 indicating the operation time, and the limit time information 74 indicating the limit time in the working status column 71 of the home screen 70 of the display device 34 as the operation state. Note that the operation time information 73 may be displayed in a count-up manner, the limit time information 74 may be displayed as a fixed value, or may be displayed in a count-down manner.

[0029] The information determination means 54 functions as a time determination means for determining the operation time measured by the time measurement means based on the limit time. The time determination means determines the operation of the attachment 43 when the operation time reaches the limit time as a dangerous operation. In this case, the notification means 53 notifies the time determination result of the operation time of the attachment 43 and the limit time by the time determination means as the operation state. For example, as the time determination result, the notification means 53 displays a message 75 describing that the operation time has reached the limit time or has reached a warning time slightly shorter than the limit time on the home screen 70 of the display device 34 as shown in FIG. 4 to notify the operation state. Further, the notification means 53 may notify the time determination result by lighting or flashing an alarm lamp or voice output. The time determination means executes (starts) the determination of the operation time, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0030] The operation control means 51 restricts the operation of the attachment 43 by stopping or suppressing it based on the time determination result of the operation time of the attachment 43 and the limit time by the time determination means. For example, the operation control means 51 suppresses the operation of the attachment 43 when the operation time reaches the warning time and stops the operation of the attachment 43 when the operation time reaches the limit time. Alternatively, the operation control means 51 suppresses the operation of the attachment 43 when the operation time reaches the limit time and stops the operation of the attachment 43 when the operation time reaches a limit time slightly longer than the limit time. The operation control means 51 executes (starts) the restriction of the operation of the attachment 43, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0031] In this case, the notification means 53 notifies, as an operation state, that the operation of the attachment 43 has been stopped or suppressed by the operation control means 51. For example, as shown in FIG. 5, the notification means 53 displays, on the home screen 70 of the display device 34, a message 76 stating that the operation of the attachment 43 has been suppressed, as the operation state. Further, as shown in FIG. 6, the notification means 53 displays, on the home screen 70 of the display device 34, a message 77 stating that the operation of the attachment 43 has been stopped, as the operation state. Note that the notification means 53 may notify in advance, before stopping or suppressing the operation of the attachment 43 by the operation control means 51, that the operation of the attachment 43 will be stopped or suppressed.

[0032] Further, when the operation control means 51 stops the operation of the attachment 43 based on the operation information of the attachment 43, the construction machine 1 may prohibit the resumption of the operation of the attachment 43 for a predetermined stop time from the stop. In this case, the notification means 53 may display on the home screen 70 of the display device 34 that the operation of the attachment 43 is stopped, and may also display on the home screen 70 the time until the operation of the attachment 43 can be resumed.

[0033] Note that in the above example, the notification means 53 has been described as an example of displaying the operation time information 73 and the limit time information 74 of the attachment 43 on the home screen 70 of the display device 34 as the operation information based on the operation time of the attachment 43, but the present invention is not limited to this example. For example, in another example, the notification means 53 may display the operation time of the attachment 43 by a meter that increases as the operation of the attachment 43 progresses with the start time of the operation of the attachment 43 being 0 and has a maximum limit time or critical time. Note that this meter may have scales for the above-described warning time, limit time, and critical time, and may be displayed by different display methods such as color-coding the levels of these times. For example, this meter may be displayed in blue when the operation of the attachment 43 is normal, in yellow when it is suppressed, and in red when it is stopped.

[0034] Note that the construction machine 1 may define in advance the warning time, limit time, and critical time of the attachment 43 for each type of the attachment 43, or may be configured to be arbitrarily set according to the operation of the operation device 35.

[0035] Next, a second embodiment of the monitoring operation of the work of the attachment 43 in the construction machine 1 will be described. In the construction machine 1, by performing warm-up operation or the like, the oil temperature of the hydraulic oil for driving the attachment 43 is set to an appropriate temperature (for example, 50 to 70°C), so that the hydraulic drive of the work machine 4 and the PTO drive of the attachment 43 can be normally performed. By the way, when the oil temperature of the hydraulic oil is too low compared to the appropriate temperature, the viscosity of the hydraulic oil increases, and the hydraulic drive of the work machine 4 and the PTO drive of the attachment 43 cannot be normally performed, and the attachment 43 may malfunction. Further, in the construction machine 1, when the oil temperature of the hydraulic oil for driving the attachment 43 is too high compared to the appropriate temperature, problems caused by deterioration of parts and a decrease in the viscosity of the hydraulic oil may occur, and the attachment 43 may malfunction. Therefore, in the second embodiment, the construction machine 1 detects an abnormal temperature of the hydraulic oil for driving the attachment 43 as a dangerous operation.

[0036] Also, in the construction machine 1, the available time for continuous striking of the breaker 43a, which is the attachment 43, that is, the limit time may change according to the oil temperature of the hydraulic oil. Therefore, in the second embodiment, when detecting continuous striking for a time longer than the limit time of the breaker 43a as a dangerous operation as in the first embodiment described above, the oil temperature of the hydraulic oil is taken into consideration. Hereinafter, differences from the first embodiment will be described.

[0037] In this case, the information acquisition means 52 functions as temperature detection means for detecting the oil temperature of the hydraulic oil and acquiring it as operation information. The temperature detection means may detect the oil temperature of the hydraulic oil by a temperature sensor provided near the hydraulic oil tank, or may detect the oil temperature of the hydraulic oil by a temperature sensor provided near the attachment 43. Alternatively, the temperature detection means may detect the average value of the detection result of the temperature sensor near the hydraulic oil tank and the detection result of the temperature sensor near the attachment 43 as the oil temperature of the hydraulic oil. Note that the temperature detection means executes (starts) the detection of the oil temperature of the hydraulic oil according to the operation of the construction machine 1 regardless of the operation of the attachment 43.

[0038] The notification means 53 displays the oil temperature information 78 indicating the oil temperature of the hydraulic oil detected by the temperature detection means on the home screen 70 of the display device 34 as shown in FIG. 7. Note that the notification means 53 may display the oil temperature information 78 by a different display method such as changing the color when the oil temperature is outside the appropriate temperature range. Alternatively, the notification means 53 may display only the description of the oil temperature information 78 when the oil temperature is outside the appropriate temperature range.

[0039] In addition, the notification means 53 notifies the operation state based on the operation time measured by the timing means as the operation information of the attachment 43 and the oil temperature of the hydraulic oil detected by the temperature detection means. As described above, the notification means 53 notifies the operation state as the time determination result between the operation time of the attachment 43 and the limit time by the time determination means of the control unit 5. The time determination means changes the limit time according to the oil temperature and performs the time determination. The time determination means shortens the limit time when the oil temperature is low, lengthens the limit time as the oil temperature approaches the appropriate temperature, and shortens the limit time again when the oil temperature is high. The control unit 5 may determine the operation of the attachment 43 when the oil temperature is abnormally low or high compared to the appropriate temperature as a dangerous operation.

[0040] For example, as shown in FIG. 8, when the oil temperature is below a predetermined lower limit temperature (for example, 40°C), the limit time is set to a predetermined lower limit time (for example, 10 seconds) shorter than the appropriate value (for example, 25 seconds to 30 seconds). As the oil temperature rises from the lower limit temperature to the appropriate temperature (for example, 50 to 70°C), the limit time is gradually set higher, and when the oil temperature is at the appropriate temperature, the limit time is set to the appropriate value. As the oil temperature further rises beyond the appropriate temperature, the limit time is gradually set lower.

[0041] The notification means 53 displays the limit time information 74 corresponding to the oil temperature as described above in the working status column 71 on the home screen 70 of the display device 34. Further, the notification means 53 may notify, by means of screen display of the display device 34, lighting or flashing of an alarm lamp, voice output, etc., that the operation time has reached the limit time corresponding to the oil temperature, or that the operation time has reached a warning time slightly shorter than the limit time corresponding to the oil temperature. When the oil temperature has not reached the appropriate temperature, the notification means 53 displays, as shown in FIG. 9, a message 79 indicating that the oil temperature is low or prompting warm-up operation on the home screen 70 of the display device 34. At this time, when the oil temperature reaches the appropriate temperature by the warm-up operation, the notification means 53 may display a warm-up completion message on the home screen 70. Further, when the oil temperature exceeds the appropriate temperature, the notification means 53 displays a message 79 indicating that the oil temperature is high or prompting the stop of the PTO operation of the attachment 43 on the home screen 70.

[0042] Based on the time determination result of the operation time of the attachment 43 by the time determination means and the limit time corresponding to the oil temperature, the operation control means 51 stops or suppresses and restricts the operation of the attachment 43 when the operation time reaches the limit time or approaches the limit time. In this case, similar to the first embodiment, the notification means 53 notifies, as the operation state, a message 76 (see FIG. 9) for suppressing the operation of the attachment 43 or a message 77 (see FIG. 10) for stopping by the operation control means 51.

[0043] Note that the construction machine 1 may define in advance the appropriate temperature, lower limit temperature of the hydraulic oil, and lower limit time of the attachment 43 for each type of the attachment 43, and may be configured to be arbitrarily set according to the operation of the operation device 35.

[0044] Next, a third embodiment of the monitoring operation of the work of the attachment 43 in the construction machine 1 will be described. In the construction machine 1, when performing a crushing operation by the breaker 43a or a crane operation by an attachment 43 such as a bucket, in order to perform the work stably, the driving shaft of the attachment 43 (for example, the driving shaft extending in the vibration direction of the rod 43b of the breaker 43a) needs to be within a predetermined safety range with respect to the vertical direction. For example, hitting the object with the driving shaft of the breaker 43a inclined, so-called diagonal hitting, or diagonal crane operation is not preferable. When the driving shaft of the attachment 43 is outside the safety range, the work becomes unstable, and the attachment 43 may malfunction or the construction machine 1 may tip over. Therefore, in the third embodiment, the construction machine 1 detects an abnormality in the posture of the attachment 43 as a dangerous operation.

[0045] In this case, the information acquisition means 52 functions as a posture detection means that detects the posture of the attachment 43 and acquires it as operation information. The posture detection means detects the angle of the driving shaft of the attachment 43 with respect to the horizontal direction (for example, the angle in the front-rear direction) as the posture of the attachment 43 according to the detection results of various sensors provided at various positions of the construction machine 1. The posture detection means executes (starts) the detection of the posture of the attachment 43, for example, according to an operation signal from the attachment operation means of the operation device 35.

[0046] For example, the construction machine 1 is provided with an inclination sensor 81 on the lower traveling body 2 and the upper slewing body 3 to detect the inclination angle of the construction machine 1 with respect to the horizontal direction. The construction machine 1 is provided with a slewing sensor 82 on the upper slewing body 3 to detect the slewing angle of the upper slewing body 3 with respect to the lower traveling body 2. The construction machine 1 is provided with an angle sensor 83 on the boom 41 to detect the rotation angle of the boom 41 with respect to the upper slewing body 3, an angle sensor 84 on the arm 42 to detect the rotation angle of the arm 42 with respect to the boom 41, and an angle sensor 85 on the link mechanism for attaching the attachment 43 to detect the rotation angle of the attachment 43 with respect to the arm 42. The attitude detection means detects the angle of the drive shaft of the attachment 43 according to the detection results of the inclination sensor 81, the slewing sensor 82, and the angle sensors 83 to 85.

[0047] The information determination means 54 functions as an attitude determination means for determining the attitude of the attachment 43 detected by the attitude detection means based on a predetermined attitude threshold value. For example, the attitude determination means defines in advance, as an attitude threshold value, a safe range that can be tolerated in terms of safety for the angle of the drive shaft of the attachment 43 by an angle value based on the vertical direction. Then, the attitude determination means determines whether or not the angle of the drive shaft of the attachment 43 detected by the attitude detection means is within the safe range. The attitude determination means may determine the operation of the attachment 43 when the angle of the drive shaft is outside the safe range as a dangerous operation. The attitude determination means executes (starts) the determination of the attitude of the attachment 43, for example, according to an operation signal from the attachment operation means of the operation device 35.

[0048] The notification means 53 notifies the attitude determination result by the attitude determination means as an operation state. The notification means 53 may notify, as an operation state, that the attitude of the attachment 43 is within the attitude threshold value or outside the attitude threshold value. The notification means 53 executes (starts) the notification of the attitude determination result of the attachment 43, for example, according to an operation signal from the attachment operation means of the operation device 35.

[0049] For example, as shown in FIG. 11 on the home screen 70 of the display device 34, the notification means 53 displays an attitude overview diagram 86 showing the relationship between the angle of the drive shaft of the attachment 43 and the safe range. In the attitude overview diagram 86, the actual attitude line 87 indicating the angle of the drive shaft of the attachment 43, the limit line 88 indicating the angle of the safe range, and the target attitude line 89 which is the most normal attitude of the attachment 43 are displayed so as to be comparable. The target attitude line 89 is in the vertical direction. At this time, when the drive shaft is within the safe range and when it is outside the safe range, the actual attitude line 87 or the limit line 88 may be displayed in different display methods. For example, as shown in FIG. 11, when the drive shaft is within the safe range, the actual attitude line 87 or the limit line 88 is displayed in blue, and as shown in FIG. 12, when the drive shaft is outside the safe range, the actual attitude line 87 or the limit line 88 is displayed in red.

[0050] Further, the notification means 53 may display on the home screen 70 of the display device 34 a message indicating that the attitude of the attachment 43 is within the attitude threshold or outside the attitude threshold. The notification means 53 may notify that the attitude of the attachment 43 is outside the attitude threshold by lighting or flashing an alarm lamp or voice output or the like.

[0051] Based on the attitude determination result of the attachment 43 by the attitude determination means, the operation control means 51 stops, suppresses, or restricts the operation of the attachment 43 when the drive shaft of the attachment 43 is outside the safe range. In this case, similar to the first embodiment, the notification means 53 notifies that the operation of the attachment 43 has been stopped or suppressed by the operation control means 51 as the operation state. The operation control means 51 executes (starts) the restriction of the operation of the attachment 43, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0052] Note that the construction machine 1 may define in advance the attitude threshold (safe range) of the attachment 43 for each type of the attachment 43, or may make it arbitrarily settable according to the operation of the operation device 35.

[0053] In the above example, the construction machine 1 has been described as an example of determining the angle of the drive shaft of the attachment 43 with respect to the horizontal direction. However, the present invention is not limited to this example. For example, in other examples, the construction machine 1 may determine the angle of the drive shaft of the attachment 43 with respect to the working surface of the object. In this case, the construction machine 1 may detect the working surface of the object by detection means such as a camera or an infrared sensor, and the notification means 53 may display the positional relationship of the working surface with respect to the horizontal direction.

[0054] Next, a fourth embodiment of the monitoring operation of the operation of the attachment 43 in the construction machine 1 will be described. In the construction machine 1, work may be performed by rotating the boom 41, the arm 42, and the attachment 43 of the work implement 4 to strike the attachment 43 against an object. However, in the case of the attachment 43 such as the breaker 43a driven by PTO, the attachment 43 may malfunction due to the striking operation. By the way, when performing normal excavation work or the like with the attachment 43 such as a bucket, the boom 41, the arm 42, and the attachment 43 of the work implement 4 are rotated according to the operation, so that vibration corresponding to the operation is generated in the attachment 43. On the other hand, when performing normal crushing work or the like with the attachment 43 such as the breaker 43a, the attachment 43 is operated by PTO drive with the rotation of the boom 41, the arm 42, and the attachment 43 stopped, so that vibration peculiar to PTO drive is generated in the attachment 43. Therefore, when performing the striking operation of the attachment 43 driven by PTO, abnormal vibration will occur in the attachment 43. Therefore, in the fourth embodiment, the construction machine 1 detects an abnormality in the vibration of the attachment 43 as a dangerous operation.

[0055] In this case, the information acquisition means 52 functions as a vibration detection means for detecting the vibration of the attachment 43 and acquiring it as operation information. The vibration detection means detects the vibration of the attachment 43 according to the detection result of a vibration sensor provided near the attachment 43. The vibration detection means executes (starts) the detection of the vibration of the attachment 43, for example, according to the operation of the work implement operation means of the operation device 35.

[0056] The information determination means 54 functions as a vibration determination means for determining the usage state of the attachment 43 based on the vibration of the attachment 43 detected by the vibration detection means. The vibration determination means executes (starts) the determination of the vibration of the attachment 43, for example, in response to the operation of the work implement operation means of the operation device 35.

[0057] For example, as shown in FIG. 13, in the striking operation of the attachment 43, the amplitude and period of the vibration are relatively large (dashed-dotted line), and in the PTO drive of the attachment 43, the amplitude and period of the vibration are relatively small (solid line). Therefore, when the type of the attachment 43 is an attachment 43 such as the breaker 43a driven by PTO, the vibration determination means determines that the usage state of the attachment 43 is appropriate when the amplitude or period of the vibration of the attachment 43 is equal to or less than a predetermined amplitude threshold or period threshold. On the other hand, when the amplitude or period of the vibration of the attachment 43 exceeds the amplitude threshold or period threshold, the vibration determination means determines that the usage state of the attachment 43 is inappropriate and determines the operation of the attachment 43 as a dangerous operation. Note that the vibration determination means does not need to perform the determination of the vibration of the attachment 43 when the type of the attachment 43 is an attachment 43 such as a bucket and the striking operation is assumed to be normal.

[0058] The notification means 53 notifies the vibration determination result by the vibration determination means as the operation state. The notification means 53 may notify whether the usage state determined from the vibration of the attachment 43 is appropriate or inappropriate as the operation state. For example, as shown in FIG. 14, the notification means 53 displays a message 90 notifying of abnormal vibration of the attachment 43 or a message indicating whether the usage state of the attachment 43 is appropriate or inappropriate on the home screen 70 of the display device 34. The notification means 53 may notify the abnormal vibration of the attachment 43 by lighting or flashing an alarm lamp or outputting sound. The notification means 53 executes (starts) the notification of the usage state, for example, in response to the operation of the work implement operation means of the operation device 35.

[0059] The operation control means 51 stops, suppresses, or restricts the operation of the attachment 43 when the use state of the attachment 43 is inappropriate based on the vibration determination result of the attachment 43 by the vibration determination means. In this case, similar to the first embodiment, the notification means 53 notifies the operation state that the operation of the attachment 43 has been stopped or suppressed by the operation control means 51. The operation control means 51 executes (starts) the restriction of the operation of the attachment 43, for example, in response to an operation signal from the work implement operation means of the operation device 35.

[0060] Note that the construction machine 1 may define in advance the amplitude threshold value and the period threshold value of the attachment 43 for each type of the attachment 43, or may be arbitrarily set according to the operation of the operation device 35.

[0061] Further, the construction machine 1 may detect the vibration of the attachment 43 while the attachment 43 is driven by PTO, and determine whether the use state of the attachment 43 is appropriate or inappropriate. In this case, by performing frequency analysis on the vibration detected from the attachment 43, it is determined whether a striking operation is included.

[0062] As described above, according to the present embodiment, the construction machine 1 includes a work implement 4 attached to the machine body, an attachment 43 attached to the work implement 4 and operable, an operation control means 51 for controlling the operation of the attachment 43, an information acquisition means 52 for acquiring the operation information of the attachment 43, and a notification means 53 for notifying the operation state regarding the dangerous operation of the attachment 43 based on the operation information acquired by the information acquisition means 52.

[0063] Thereby, by performing the support process for the PTO operation of the attachment 43 through the acquisition process of the operation information, the notification process of the operation state, etc., the operator can grasp the operation state regarding the dangerous operation of the attachment 43. Therefore, it is possible to avoid the dangerous operation of the attachment 43 and prevent the failure of the attachment 43. Accordingly, it is possible to provide the construction machine 1 that can safely use the attachment 43.

[0064] According to the first embodiment, in the construction machine 1, the information acquisition means 52 functions as a time measurement means for measuring the operation time of the attachment 43 and acquiring it as operation information, and the notification means 53 notifies the operation state based on the operation time. Thereby, the operator can grasp the operation time of the attachment 43 and be aware of the recommended operations related to the operation time. Therefore, by the operator avoiding dangerous operations of the attachment 43 based on the operation time, it is possible to prevent failures of the attachment 43.

[0065] The construction machine 1 further includes a time determination means of an information determination means 54 that determines the operation time measured by the time measurement means based on a predetermined limit time, and the notification means 53 notifies the time determination result by the time determination means as an operation state. Thereby, by informing the operator of the time determination result such as the elapse of the limit time regarding the operation time of the attachment 43, it is possible to prompt the operator to stop or suppress the operation of the attachment 43. Therefore, by the operator avoiding dangerous operations of the attachment 43 based on the time determination result, it is possible to prevent failures of the attachment 43.

[0066] In the construction machine 1, the operation control means 51 suppresses the operation of the attachment 43 based on the time determination result by the time determination means, and the notification means 53 notifies the suppression of the operation of the attachment 43. Thereby, according to the timing of the time determination result such as the operation time of the attachment 43 reaching the limit time, the operation of the attachment 43 can be automatically suppressed, and the load on the attachment 43 can be reduced. Therefore, it is possible to automatically avoid dangerous operations of the attachment 43 and prevent failures of the attachment 43.

[0067] In construction machine 1, the operation control means 51 stops the operation of the attachment 43 based on the time determination result by the time determination means, and the notification means 53 notifies the stop of the operation of the attachment 43. Thereby, according to the timing of the time determination result such as the operation time of the attachment 43 reaching the limit time, the operation of the attachment 43 can be automatically stopped, and the load on the attachment 43 can be reduced. Therefore, the dangerous operation of the attachment 43 can be automatically avoided, and the failure of the attachment 43 can be prevented.

[0068] The construction machine 1 further includes an attachment operation means of an operation device 35 that receives an operation of the attachment 43. The timing means measures the operation time according to the operation of the attachment 43 by the attachment operation means, and the notification means 53 executes a notification of the operation state according to the operation of the attachment 43 by the attachment operation means. Thereby, by executing the timing process and the notification process only during the operation of the attachment 43, it is possible to prevent the support process of the PTO operation of the attachment 43 from malfunctioning.

[0069] According to the second embodiment, in the construction machine 1, the attachment 43 is driven by the hydraulic power of the hydraulic oil. The information acquisition means 52 functions as a temperature detection means that detects the oil temperature of the hydraulic oil and acquires it as operation information. The notification means 53 notifies the operation state based on the operation time according to the operation time and the oil temperature. Thereby, according to the oil temperature (viscosity) of the hydraulic oil, it is possible to more accurately grasp the operation time that can operate safely. Therefore, even when the working environment changes, it is possible to notify a more appropriate operation state.

[0070] In construction machine 1, the operation control means 51 suppresses the operation of the attachment 43 based on the operation time and the oil temperature, and the notification means 53 notifies the suppression of the operation of the attachment 43. Thereby, by more accurately grasping the operation time in consideration of the oil temperature, the operation of the attachment 43 can be suppressed at a more appropriate timing, and the load on the attachment 43 can be reduced. Therefore, the dangerous operation of the attachment 43 can be avoided at a more appropriate timing, and the failure of the attachment 43 can be prevented.

[0071] In construction machine 1, the operation control means 51 stops the operation of the attachment 43 based on the operation time and the oil temperature, and the notification means 53 notifies the stop of the operation of the attachment 43. Thereby, by more accurately grasping the operation time in consideration of the oil temperature, the operation of the attachment 43 can be stopped at a more appropriate timing, and the load on the attachment 43 can be reduced. Therefore, the dangerous operation of the attachment 43 can be avoided at a more appropriate timing, and the failure of the attachment 43 can be prevented.

[0072] According to the third embodiment, in the construction machine 1, the information acquisition means 52 functions as a posture detection means that detects the posture of the attachment 43 and acquires it as operation information. The construction machine 1 further includes a posture determination means 54 of the information determination means that determines the posture detected by the posture detection means based on a predetermined posture threshold value, and the notification means 53 notifies the posture determination result by the posture determination means as an operation state. Thereby, the operator can make the attachment 43 in a safe posture (recommended posture) by grasping the actual posture of the attachment 43 (for example, the angle in the front-rear direction). Therefore, the dangerous operation of the attachment 43 can be avoided, and the failure of the attachment 43 can be prevented.

[0073] According to the fourth embodiment, in the construction machine 1, the information acquisition means 52 functions as a vibration detection means that detects the vibration of the attachment 43 and acquires it as operation information. The construction machine 1 further includes a vibration determination means that determines the usage state of the attachment 43 based on the vibration detected by the vibration detection means. The notification means 53 notifies the vibration determination result by the vibration determination means as an operation state. Thereby, based on the vibration of the attachment 43, the usage state (for example, appropriate or inappropriate) of the attachment 43 can be notified to the operator. Therefore, it is possible to prevent the failure of the attachment 43 caused by abnormal use, so that the product life of the attachment 43 can be maintained and the safe operation of the construction machine 1 can be ensured.

[0074] The construction machine 1 further includes a work implement operation means of an operation device 35 that receives the operation of the work implement 4. The vibration detection means executes the vibration detection of the attachment 43 according to the operation of the work implement 4 by the work implement operation means. The notification means 53 executes the notification of the operation state according to the operation of the work implement 4 by the work implement operation means. Thereby, it is possible to prevent the assist process of the PTO operation of the attachment 43 from malfunctioning by executing the vibration detection process and the notification process only during the operation of the work implement 4.

[0075] In the above-described embodiment, the construction machine 1 acquires the operation time of the attachment 43 to detect excessive continuous impacts, acquires the oil temperature of the hydraulic oil to detect temperature abnormalities and more accurately determine the operation time, acquires the posture of the attachment 43 to detect unstable operations such as diagonal hitting and diagonal crane operations, and acquires the vibration of the attachment 43 to detect inappropriate hitting. However, the present invention is not limited to these examples. For example, in other embodiments, the construction machine 1 acquires various operation information of the attachment 43 and, based on any of the operation information, detects inappropriate prying operations using the attachment 43, the necessity of grease lubrication of the attachment 43, operations at unstable locations, jacking up or shoveling floating, various dangerous operations such as inappropriate turning operations and sideward operations.

[0076] As another example, the construction machine 1 detects an operating load applied to an attachment 43 such as a bucket and detects a dangerous operation of the attachment 43 based on this operating load. For example, the construction machine 1 may perform a jack-up operation to lift at least one of the pair of crawlers 21 by causing the boom 41 and the arm 42 to perform a predetermined operation with the attachment 43 such as a bucket grounded. At this time, excessive force may be applied to the attachment 43, the boom 41, and the arm 42, which may cause a failure or the construction machine 1 to tip over. Therefore, the construction machine 1 detects the operating load of the attachment 43 based on the inclination of the machine body and detects such a jack-up state as a dangerous operation.

[0077] In this case, the information acquisition means 52 functions as a load detection means for detecting the operating load applied to the attachment 43. The load detection means measures the inclination angle of the construction machine 1 with respect to the vertical direction by means of the inclination sensor 81 and acquires it as operation information. The load detection means executes (starts) the measurement of the inclination angle, for example, in response to an operation signal from the attachment operation means of the operation device 35. The load detection means measures the inclination angle of the construction machine 1 in all directions in the horizontal direction with the vertical direction being 0 degrees.

[0078] The notification means 53 notifies the operating state of the attachment 43 based on the inclination angle of the machine body measured by the load detection means as the operation information of the attachment 43. The notification means 53 executes (starts) the notification of the inclination angle, for example, in response to an operation signal from the attachment operation means of the operation device 35. For example, as shown in FIG. 15, the notification means 53 displays on the home screen 70 of the display device 34 a schematic diagram (not shown) showing the inclination angle of the machine body with respect to the vertical direction or a schematic diagram (not shown) showing the center of gravity position of the machine body in the horizontal direction like a level.

[0079] The information determination means 54 functions as a load determination means for determining whether the operation of the attachment 43 is a dangerous operation based on the operation load of the attachment 43 detected by the load detection means. The load determination means determines, for example, the inclination angle of the machine body measured by the load detection means based on a predetermined inclination angle threshold value. When the inclination angle reaches the inclination angle threshold value, the load determination means detects the jacked-up state of the construction machine 1 and determines the operation of the attachment 43 at this time as a dangerous operation. The load determination means executes (starts) the determination of the operation time, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0080] In this case, the notification means 53 notifies the inclination determination result between the inclination angle by the load determination means and the inclination angle threshold value as the operation state. For example, the notification means 53 displays, on the home screen 70 of the display device 34, that the inclination angle has reached the inclination angle threshold value or that the construction machine 1 is in the jacked-up state as the inclination determination result to notify the operation state. Further, the notification means 53 may notify the inclination determination result by lighting or flashing an alarm lamp or outputting sound.

[0081] The operation control means 51 stops, suppresses, and restricts the operation of the attachment 43 based on the inclination determination result between the inclination angle by the load determination means and the inclination angle threshold value. For example, when the inclination angle reaches the inclination angle threshold value, the operation control means 51 detects the jacked-up state of the construction machine 1 and suppresses or stops the operation of the attachment 43. The operation control means 51 executes (starts) the restriction of the operation of the attachment 43, for example, in response to an operation signal from the attachment operation means of the operation device 35.

[0082] In this case, the notification means 53 notifies the operation state that the operation of the attachment 43 has been stopped or suppressed by the operation control means 51. Note that the notification means 53 may notify in advance the fact that the operation control means 51 will stop or suppress the operation of the attachment 43 before the stop or suppression is performed. Further, when the operation control means 51 stops the operation of the attachment 43 based on the operation information of the attachment 43, the construction machine 1 may prohibit the restart of the operation of the attachment 43 for a predetermined stop time after the stop.

[0083] In the above-described other embodiments, an example has been described in which the jacked-up state of the construction machine 1 is detected as a dangerous operation based on the inclination of the construction machine 1. However, the present invention is not limited to this example. For example, in addition to the inclination of the construction machine 1, the construction machine 1 may detect the jacked-up state of the construction machine 1 as a dangerous operation based on the operating conditions of the boom 41, the arm 42, and the attachment 43.

[0084] In the construction machine 1, the operating conditions of the boom 41, the arm 42, and the attachment 43 can be determined based on the pressure of each hydraulic oil acting on the boom 41, the arm 42, and the attachment 43. Therefore, the construction machine 1 includes a pressure sensor (not shown) that detects the pressure of each hydraulic oil in each hydraulic actuator that drives the boom 41, the arm 42, and the attachment 43. The load detection means of the information acquisition means 52 measures the pressure of each hydraulic oil acting on the boom 41, the arm 42, and the attachment 43 by the pressure sensor in addition to the inclination angle of the construction machine 1 and acquires it as operation information.

[0085] The notification means 53 notifies the operating state of the attachment 43 based on the operating information of the attachment 43 in addition to the operating state of the attachment 43 based on the inclination angle of the machine body, based on the pressures of the hydraulic oils of the boom 41, the arm 42, and the attachment 43 measured by the load detection means. For example, as shown in FIG. 15 on the home screen 70 of the display device 34, the notification means 53 displays the pressures of the hydraulic oils of the boom 41, the arm 42, and the attachment 43, and a schematic diagram (not shown) showing the positional relationship of the boom 41, the arm 42, and the attachment 43.

[0086] The load determination means of the information determination means 54 determines, in addition to the inclination determination described above, the pressures of the hydraulic oils of the boom 41, the arm 42, and the attachment 43 measured by the load detection means based on a predetermined pressure threshold value, and determines whether the operation of the attachment 43 is a dangerous operation based on the inclination determination result and the hydraulic pressure determination result. For example, when the load determination means determines that the inclination angle has reached the inclination angle threshold value and determines that the pressure of the hydraulic oil has reached the pressure threshold value, the load determination means detects the jacked-up state of the construction machine 1 and determines the operation of the attachment 43 at this time as a dangerous operation.

[0087] In this case, the notification means 53 notifies, in addition to the inclination determination result by the load determination means, the hydraulic pressure determination result of the pressures of the hydraulic oils of the boom 41, the arm 42, and the attachment 43 by the load determination means as the operating state. For example, the notification means 53 displays on the home screen 70 of the display device 34 that the inclination angle has reached the inclination angle threshold value as the inclination determination result, that the pressure of the hydraulic oil has reached the pressure threshold value as the hydraulic pressure determination result, and that the construction machine 1 is in the jacked-up state, and notifies the operating state.

[0088] When the operation control means 51 detects the jacked-up state of the construction machine 1 based on the inclination determination result and the hydraulic pressure determination result by the load determination means, the operation control means 51 stops or suppresses and restricts the operation of the attachment 43.

[0089] Alternatively, in another embodiment, when the construction machine 1 drives the boom 41, the arm 42, and the attachment 43 by respective hydraulic actuators, the cylinder of each hydraulic actuator may reach the stroke end. At this time, an excessive force may be applied to the attachment 43, the boom 41, and the arm 42, which may cause a failure. Therefore, the construction machine 1 detects the operating load of the attachment 43 based on the operating conditions of the boom 41, the arm 42, and the attachment 43, and detects such a stroke end state as a dangerous operation.

[0090] In this case, the load detection means of the information acquisition means 52 measures the respective working angles of the boom 41, the arm 42, and the attachment 43 by the angle sensors 83, 84, and 85 and acquires them as operation information. Further, the load detection means of the information acquisition means 52 measures the pressure of each hydraulic oil acting on the boom 41, the arm 42, and the attachment 43 by a pressure sensor and acquires it as operation information.

[0091] The notification means 53 notifies the operating state of the attachment 43 based on the respective working angles of the boom 41, the arm 42, and the attachment 43 measured by the load detection means and the pressure of each hydraulic oil as the operation information of the attachment 43. For example, as shown in FIG. 16, the notification means 53 displays on the home screen 70 of the display device 34 a schematic diagram (not shown) showing the pressure of each hydraulic oil of the boom 41, the arm 42, and the attachment 43 and the positional relationship such as the respective working angles of the boom 41, the arm 42, and the attachment 43.

[0092] The load determination means of the information determination means 54 determines the working angles of the boom 41, the arm 42, and the attachment 43 and the pressures of the respective hydraulic oils detected by the load detection means based on a predetermined working angle threshold value and a predetermined pressure threshold value, and determines whether the operation of the attachment 43 is a dangerous operation based on the angle determination result and the hydraulic pressure determination result. For example, when the load determination means determines that the working angle has reached the working angle threshold value and the pressure of the hydraulic oil has reached the pressure threshold value for any one of the boom 41, the arm 42, and the attachment 43, the load determination means detects the stroke end state and determines the operation of the attachment 43 at this time as a dangerous operation.

[0093] In this case, the notification means 53 notifies the angle determination result between each working angle by the load determination means and the working angle threshold value and the hydraulic pressure determination result of the pressure of each hydraulic oil by the load determination means as the operation state. For example, the notification means 53 displays on the home screen 70 of the display device 34 that the working angle has reached the working angle threshold value as the angle determination result, that the pressure of the hydraulic oil has reached the pressure threshold value as the hydraulic pressure determination result, and that the boom 41, the arm 42, or the attachment 43 is in the stroke end state to notify the operation state.

[0094] Based on the angle determination result and the hydraulic pressure determination result by the load determination means, when the operation control means 51 detects the stroke end state of the boom 41, the arm 42, or the attachment 43, the operation control means 51 stops or suppresses and restricts the operation of the attachment 43.

[0095] Alternatively, in other embodiments, in the construction machine 1, when the upper swing body 3 and the working machine 4 swing with respect to the lower traveling body 2, the upper swing body 3 and the working machine 4 may be in a lateral direction intersecting the traveling direction of the construction machine 1 by the lower traveling body 2. When the boom 41, the arm 42, and the attachment 43 are driven to perform work in such a state where the working machine 4 is in the lateral direction, excessive force is applied to the attachment 43, the boom 41, and the arm 42, which may cause a failure or the construction machine 1 to tip over. Therefore, the construction machine 1 detects the operating load of the attachment 43 based on the swing of the working machine 4 and the operating conditions of the boom 41, the arm 42, and the attachment 43, and detects such lateral work as a dangerous operation.

[0096] In this case, the load detection means of the information acquisition means 52 measures the swing angle of the working machine 4 by a swing sensor 82 such as a yaw rate sensor and acquires it as operation information. Further, the load detection means of the information acquisition means 52 measures the respective working angles of the boom 41, the arm 42, and the attachment 43 and the pressure of each operating oil and acquires it as operation information.

[0097] The notification means 53 notifies the operating state of the attachment 43 based on the swing angle of the working machine 4 measured by the load detection means as the operation information of the attachment 43, the respective working angles of the boom 41, the arm 42, and the attachment 43, and the pressure of each operating oil. For example, as shown in FIG. 17, the notification means 53 displays an outline diagram (not shown) showing the positional relationship such as the swing angle of the working machine 4, the pressure of each operating oil of the boom 41, the arm 42, and the attachment 43, and the respective working angles of the boom 41, the arm 42, and the attachment 43 on the home screen 70 of the display device 34.

[0098] The load determination means of the information determination means 54 determines the swing angle of the working machine 4 detected by the load detection means based on a predetermined swing angle threshold value, and also determines the working angles of the boom 41, the arm 42, and the attachment 43 and the pressures of the respective hydraulic oils based on a predetermined working angle threshold value and a predetermined pressure threshold value, and determines whether the operation of the attachment 43 is a dangerous operation based on the swing determination result, the angle determination result, and the hydraulic pressure determination result. For example, when the load determination means determines that the swing angle has reached the swing angle threshold value and the construction machine 1 is sideways, and determines that the construction machine 1 is in operation based on the working angles of the boom 41, the arm 42, and the attachment 43 and the pressures of the respective hydraulic oils, the load determination means detects the sideways operation and determines the operation of the attachment 43 at this time as a dangerous operation.

[0099] In this case, the notification means 53 notifies the swing determination result between the swing angle by the load determination means and the swing angle threshold value, the angle determination result between each working angle by the load determination means and the working angle threshold value, and the hydraulic pressure determination result of the pressure of each hydraulic oil by the load determination means as the operation state. For example, as the swing determination result, the notification means 53 notifies that the swing angle has reached the swing angle threshold value or the construction machine 1 is sideways, as the angle determination result, that the working angle has reached the working angle threshold value, and as the hydraulic pressure determination result, that the pressure of the hydraulic oil has reached the pressure threshold value, that the construction machine 1 is in operation, or that the construction machine 1 is performing a sideways operation, by displaying on the home screen 70 of the display device 34 to notify the operation state.

[0100] When the operation control means 51 detects the sideways operation of the construction machine 1 based on the swing determination result by the load determination means, the angle determination result, and the hydraulic pressure determination result, the operation control means 51 stops or suppresses and restricts the operation of the attachment 43.

[0101] In the above-described embodiment, an example in which the construction machine 1 displays and notifies the operation information and operation state of the attachment 43 on the home screen 70 of the display device 34 has been described, but the present invention is not limited to this example. For example, in other embodiments, the construction machine 1 may display the operation information and operation state of the attachment 43 on other screens of the display device 34.

[0102] Note that the present invention can be appropriately modified within a range not contrary to the gist or idea of the invention that can be read from the claims and the entire specification, and a construction machine involving such a modification is also included in the technical idea of the present invention.

Explanation of Reference Numerals

[0103] 1 Construction machine 4 Working machine 5 Control unit 6 Storage unit 31 Engine 34 Display device 35 Operating device 41 Boom 42 Arm 43 Attachment 43a Breaker 51 Operation control means 52 Information acquisition means 53 Notification means 54 Information determination means (determination means)

Claims

1. A construction machine, a working machine attached to the machine body, an attachment attached to the working machine and operable, information acquisition means for acquiring operation information of the attachment, and a display device for displaying an operation state related to a dangerous operation of the attachment based on the operation information acquired by the information acquisition means. The information acquisition means functions as a timing means for measuring a continuous operation time of the attachment and acquiring it as the operation information, the display device displays the continuous operation time together with a limit time of continuous operation of the attachment, further comprising determination means for determining a dangerous operation of the attachment based on the operation information acquired by the information acquisition means, the determination means determines an operation of the attachment when the continuous operation time reaches the limit time as the dangerous operation, the display device is characterized in that when the continuous operation time reaches the limit time, a determination result by the determination means is simultaneously overlaid and displayed above the continuous operation time and the limit time on the screen. The construction machine is characterized by this.

2. The construction machine according to claim 1, wherein the display device notifies the determination result by the determination means as the operation state.

3. further comprising operation control means for controlling the operation of the attachment, the operation control means suppresses the operation of the attachment based on the determination result by the determination means, the construction machine according to claim 2, wherein the display device notifies suppression of the operation of the attachment.

4. further comprising operation control means for controlling the operation of the attachment, the operation control means stops the operation of the attachment based on the determination result by the determination means, The construction machine according to claim 2, wherein the display device notifies the stop of the operation of the attachment.

5. The construction machine further comprises attachment operation means for receiving an operation of the attachment, The construction machine according to claim 1, wherein the time measuring means measures the continuous operation time in response to an operation of the attachment by the attachment operation means.

6. The attachment is driven by hydraulic power of hydraulic oil, The information acquisition means functions as temperature detection means for detecting an oil temperature of the hydraulic oil and acquiring the oil temperature as the operation information, The construction machine according to claim 2, wherein the determination means changes the limit time according to the oil temperature and performs a time determination with the continuous operation time.

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