JPH11116185A - Working condition recording device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working condition recording device for construction machine which records the safety device set condition in the hazardous state, change in the machine situation and change in the manipulation of the operator continuously, displays the hazard information, and thereby is capable of contributing sufficiently to the grasp of and search after the cause of the present trouble. SOLUTION: The operating situation of the machine, the machine manipulating condition of the operator, and the device set condition are sensed by an overload preventive device ML which thereupon emits a machine condition signal, operator's manipulation signal, set condition signal, and machine operating system hazard signal. Besides this overload preventive device ML, the arrangement includes a clock 2 to emit clock signals, a record display device 4, and an information processing device 1 which connects the preventive device ML and clock 2 with the input port and also the record display device 4 with the output port. The information processing device 1 records the operating situation of the machine, the machine manipulating condition of the operator, the device set condition, and various pieces of real-time information about the construction machine are continuously recorded at intervals according to the unitary recording period lasting from the feed of the machine operating system hazard signal from the preventive device ML till the time the signal goes out, and on the basis thereof the hazard information showing the hazardous state of the construction machine is displayed on the record display device 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a construction machine such as a mobile crane and records the working state and running state of the machine in a danger such as an overload state or an engine overrun.
The present invention relates to a work state recording device for a construction machine to be displayed.

[0002]

2. Description of the Related Art A typical prior art relating to an overload information recording device used in construction machines such as cranes and aerial work vehicles is disclosed in Japanese Utility Model Laid-Open Publication No. 61-5888. This prior art will be described with reference to FIG. 3. A recording and display device 3 is connected to an output port of the information processing device 1 and is actually implemented by an overload prevention device ML (in the case of a crane, a legally required device). A danger signal output when the load exceeds the rated load and a time signal output by the clock 2 are input, and an operation signal is output when the danger signal is input and disappears. The recording display device 3 is configured to record the state of the state, the working posture such as the boom length and the boom angle at that time, and the time.

By providing such a recording device,
Since a record of when the cargo handling machine is overloaded can be obtained, it can be used for investigating the cause of the accident and for repair and maintenance.

[0004]

In the above prior art, only records at the time of an overload state and at the time of returning to a steady state remain. Also, the operation status and the like of the operator at that time are not completely clarified. Therefore, although the fact of whether or not there is an overload is obvious, it is not sufficient as a means for investigating the cause of the accident because it is not possible to know how the machine has fallen or been damaged, for example. .

In view of the fact that the conventional recording apparatus has a problem that cannot be said to be sufficient as a material useful for investigating a scientific cause at the time of occurrence of an accident, the present invention is intended to solve the problem. Therefore, an object of the present invention is to continuously record the setting state of the safety device, a change in the state of the machine, a change in the operation of the operator at the time of a danger, and a danger information. Is provided to provide a construction machine work state recording device that can sufficiently contribute to understanding and investigating the cause of an accident.

[0006]

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 of the present invention provides a machine working state,
An overload prevention device that detects an operator's machine operation state and apparatus setting state and outputs a machine state signal, an operator machine operation signal and a setting state signal, and a machine work system danger signal, a clock that outputs a time signal, and a record display. Equipment and
An operation state recording device provided in the construction machine including an overload prevention device and an information processing device input from a clock and output to the recording display device, wherein the information processing device includes:
The machine working state, operator machine operating state, machine setting state, and machine working system information of time are taken as a recording unit period from the time when the machine working system danger signal is input to the time when the machine working system danger signal is input from the overload prevention device. The apparatus is characterized in that it is configured to continuously record, and to display, on the recording and display device, danger information indicating a danger state of the construction machine based on the content thereof.

[0007] The invention of claim 2 of the present invention provides:
An overload prevention device that detects a machine working state, an operator's machine operating state and a machine setting state and outputs a machine state signal, an operator machine operating signal and a setting state signal, and a machine working system danger signal; A traveling system danger signal output device that detects a traveling operation state and a traveling setting state and outputs a traveling state signal, an operator traveling operation signal, a traveling setting state signal, and a mechanical traveling system danger signal; a clock that outputs a time signal; A work status recording device provided in a construction machine including a display device, and an information processing device that is input from an overload prevention device, a clock and a traveling system danger signal output device, and outputs the information to a recording display device, wherein the information processing device includes: The device is designed to reduce the number of danger signals of the machine operation system from the overload protection device and the danger signal of the machine traveling system from the traveling system danger signal output device. The time from when the danger signal for the machine work system is input until it disappears is set as the recording unit period. At least machine operation system information of the operation state, the traveling setting state and the machine traveling system information of the time are continuously recorded, and the danger information representing the danger state of the construction machine based on the contents is recorded. It is characterized in that it is configured to display on the recording and display device.

[0008] The invention of claim 3 in the present invention provides:
According to the first or second aspect of the present invention, the information processing apparatus includes a memory that continuously records the information relating to the latest danger state, and records a history of a predetermined information item before that. An operation state recording device for a construction machine, characterized in that:

Further, the invention of claim 4 in the present invention provides:
4. The working state of a construction machine according to claim 1, wherein the information processing apparatus includes an output port through which each recorded information can be led to an external device such as a personal computer. It is a recording device.

According to the present invention, when a crane is taken as an example, an overload state that causes the crane to overturn or break, a boom extension / retraction error state that causes boom breakage, and the like. Since the change of the working state of the machine in the dangerous state in the crane operation can be recorded every time the dangerous state occurs, it is possible to secure operation information effective for scientific management and analysis.

Further, by providing a danger signal output device for a traveling system for outputting a danger signal for the traveling system, in the case of a mobile crane or the like, an engine overrun condition which causes damage to the machine and the like. Since the change in the working state of the machine based on the danger state during traveling such as the running state and the speed overrun state can be recorded together, further improvement of the management information is expected.

Further, the latest danger state is continuously recorded, and the previous state is recorded in the record as necessary information, so that a fall or breakage accident can be continuously recorded. The cause can be investigated, and the history record can be used to identify fatigue failure accidents.

[0013] Further, since the recorded data of the information processing device can be taken out to an external device such as a personal computer, a large amount of detailed data that cannot be displayed on the recording and display device can be easily obtained, and the data analysis can be performed. Can be done quickly and reliably.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a working state recording device for a construction machine according to an embodiment of the present invention. The work state recording device shown in FIG. 1 is a device when applied to a mobile crane, and ML is an overload prevention device that is legally obliged to equip the crane with a CPU (Central Processing Unit). Information processing device) 12a, memory 12b, input port 12c
It has two output ports 12d, 12e and a display 12f.

The overload prevention device ML includes an actual load detector 6a, a boom length detector 6b, a boom angle detector 6c,
A machine operation state detector 6 including an outrigger extension state detector 6d, a turning angle detector 6e, etc., an operator machine operation detector 7 for detecting an operator's machine operation state such as lever operation, a boom operation, a jib operation, etc. A device setting switch 8 for performing various device settings such as a work mode is connected to the input port 12c, and an output control device 20 such as an electromagnetic shut-off valve for stopping operation is connected to the output port 12d. Prepare.

The overload prevention device ML constantly performs arithmetic processing based on various types of input information, and displays a load factor, a boom length, a boom angle, a working radius, a head, and the like on a display 12f. When a danger state in the crane operation, such as an overload state or a boom extension operation error state, is determined, an operation stop output or a mechanical work danger signal is output. The output of the danger signal for the mechanical working system is not limited to the moment when the danger state is attained, but may be output before and after the level indicating the danger state. For example, in the case of an overload state, although the point of time when the load factor is 100% is the moment when the dangerous state is reached, the output of the danger signal may be set to the point of time when the load factor is 95% or 110%. That is.

The output of the above-mentioned danger signal and display signal of the machine working system is used as an input signal for the crane control and the information processing apparatus 1 which is an element member of the present embodiment via an output port 12e. Regarding the mechanical work danger signal, the output set values for the crane control and the input of the information processing device 1 do not necessarily have to match.

Further, in FIG. 1, C is a traveling danger signal output device, which is a CPU (central information processing device) 13a.
, Memory 13b, input port 13c and output port 1
3d, a mechanical traveling state detector 9 including a vehicle speed detector 9a, an engine rotation detector 9b, and the like, and an operator traveling operation detector 1 including a shift lever 10a, a brake operation detector 10b, an accelerator operation detector 10c, and the like.
0 is connected to the input port 13c.

The traveling system danger signal output device C includes:
A calculation is always performed based on various types of input information. As a result of the calculation, when a danger state during running, such as a speed overrun or an engine overrun, is determined, a danger signal for a mechanical traveling system is output. The output of the mechanical traveling system danger signal is not limited to the moment when the danger state is attained, and may be output before and after the level indicating the danger state. For example, the output of the danger signal may be set to 3100 rpm or 3400 rpm even when the engine overrun is in danger at 3200 rpm or more. The above-mentioned signals of the traveling state such as the vehicle speed, the engine rotation, and the gear output obtained from the calculation result and the mechanical traveling system danger signal are used as input signals of the information processing device 1.

The information processing apparatus 1 has the same basic configuration as a known microcomputer, and includes a CPU 1a.
, A memory 1b, an input port 1c and an output port 1d. The input port 1c is connected to the overload prevention device M described above.
L and the danger signal output device C of the traveling system are connected to the output port 12e and the output port 13d of the danger signal output device C, and the danger signal for the mechanical working system of the crane system, the load factor, the boom length, the boom angle, the working radius,
Machine work system information related to crane work such as lift, machine operation state such as outrigger extended state, operator operation operation state such as lever operation, and device setting state such as operation mode, and machine traveling system danger signal, Machine traveling system information relating to machine traveling, such as a machine traveling state such as a vehicle speed, an engine rotation, and a gear output state obtained from a calculation result, and an operator traveling operation state such as a shift lever input state, a brake and accelerator state, and the like, is input. As well as
In addition, a time signal is also input by connecting to the clock 2.

Information processing apparatus 1 having such a structure
Further, an operation signal from the switch 3 for recording and display operation is input to the input port 1c. Then, a recording unit period from the time when the mechanical work danger signal is input by the CPU 1a to the time when it disappears, or the recording unit from the time when the mechanical work danger signal and the machine traveling danger signal are inputted to the time when it disappears. During the period, all the input information related to the danger signal is continuously stored in the memory 1.
Record in b. If the recording unit period is long and exceeds a predetermined memory capacity, new data retroactively starting from the latest data in the memory capacity can be accumulated while sequentially deleting old data, so that the data immediately before the accident can be stored. Is always left.

Furthermore, not only the latest data but also a record of a high danger state such as a record at the time of the highest load factor is left as a history, and a record related to fatigue failure is integrated with the record. It is a preferable embodiment that the recording is sequentially performed with the information items based on the conditions to be performed.
By providing a recording area in the memory 1b for each danger state such as an overload state, a boom extension / retraction operation error state, and an engine overrun state, even if a plurality of danger states occur almost simultaneously, there is no problem at all. Information can be recorded.

The data in the memory 1b is stored in the output port 1 for the danger state selected by the record / display operation switch 3.
The data can be displayed on the recording and display device 4 via d. Further, the memory 1b is connected to the external device 5 such as a personal computer through the output port 1d by the switch 3.
This data is sent using serial communication so that data can be graphed and analyzed in detail.

Next, the information processing process of the embodiment of FIG. 1 will be described with reference to FIG.
This will be described below with reference to the flowchart shown in FIG. Note that this information processing process is for the mode in which the overload prevention device ML outputs in the crane that is stationary and is operated. The flow is similar.

Prior to the start of the work, the operator operates the device setting switch 8 in step S1 to initialize the work mode and the like to start crane work. It is checked whether or not is operated on the display side,
If it is not operated on the display side, it is checked in the next step S3 whether the danger signal of the machine working system is turned on or off. Here, when the danger signal for the mechanical working system is not input, it means that the crane work is being performed in a steady state.
The check in step S3 is continuously performed.

In step S3, when a danger signal for the mechanical working system is input due to the occurrence of an overload condition or the like, step S4.
Then, the related data, that is, the machine operation state, the operator machine operation state, the apparatus setting state, and the machine work system information of the time are continuously input during the recording unit period in which the danger signal is input. Therefore, in the next step S5, it is checked whether or not there is data that needs to be integrated.

If there is no data that needs to be integrated, the process directly proceeds to step S7, while if there is data, the process proceeds to step S6, where the input data is stored at a predetermined address in the memory 1b, and then to step S6. It is checked whether the time of continuous recording is shorter or longer than a predetermined time in relation to the capacity of the memory 1b.

If the continuous recording time is shorter than the predetermined time, the flow shifts to step S8, where the input information of the machine working system is continuously stored in the memory 1b. On the other hand, if the continuous recording time is longer than the predetermined time, step S9
Then, it is checked whether or not the oldest data is data necessary to remain as a history. If the data is not necessary to be stored as a history, the process proceeds to the next step S11, where the oldest data is canceled, and the input information of the machine working system is continuously stored in the memory 1b. You.

On the other hand, if the data is necessary to be stored as a history, the process proceeds to step S10, where the oldest data is stored in the memory 1b in order to remain as a history, and then to step S11, where the oldest data is stored. The data is canceled, and the input information of the machine working system is continuously stored in the memory 1b. In this way, when the data related to the machine operation state, the operator machine operation state, the machine setting state, and the machine operation system information such as the time are continuously recorded during the recording unit period from step S3 to step S11, the information is continuously recorded. Then, returning to step S2, a series of information processing is repeatedly performed.

If it is checked in step S2 that the record display operation switch 3 has been operated on the display side, the flow advances to step S12 to execute the mechanical operation system input according to the contents of the display selection. The record information selected and extracted from each information is read, and further, the process proceeds to step S13, where the record information is displayed on the record display device 4 or stored in the external device 5. When display and storage are performed in this manner, step S
Returning to step 2, the same information processing is repeated.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 is for a construction machine involving movement such as a wheeled crane. For example, in the case of a construction machine involving no movement, the danger signal output device C for the traveling system is omitted. The information processing device 1 may be combined with the overload prevention device ML and the clock 2 as input signal elements. Further, regarding the configuration in the above embodiment,
The CPU and the memory of the information processing device 1, the overload prevention device ML, and the traveling-system danger signal output device C can be shared by one unit. Of course, it is also possible to incorporate it inside the processing device 1, whereby the number of CPUs, memories, input / output wirings and the like can be reduced, and the device can be simplified and the cost can be reduced.

[0032]

The present invention is embodied in the form described above and has the following effects.

The state of the machine when the construction machine is in a dangerous state such as an overload state, a machine operation error state, or an engine overrun state, and changes in the operation of the operator are continuously recorded over time. Can be displayed,
Investigation into the cause of an accident can be performed reliably, quickly, and rationally.

[Brief description of the drawings]

FIG. 1 is a configuration diagram shown by blocks according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a mode of information processing in the information processing apparatus 1 shown in FIG. 1;

FIG. 3 is a block diagram showing a basic configuration of the prior art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Information processing device 2 ... Clock 3 ... Record display operation switch 4 ... Record display device 5 ... External device 6 ... Machine working state detector 7 ... Machine operation detector 8 ... Device setting switch 9 ... Machine running state detector 10 ... Operator traveling operation detector 20 ... Output control device C ... Traffic danger signal output device ML ... Overload prevention device

Claims (4)

[Claims] 1. An overload prevention device for detecting a machine working state, an operator's machine operating state, and a machine setting state and outputting a machine state signal, an operator machine operating signal, a setting state signal, and a machine working system danger signal. The construction machine includes a clock that outputs a signal, a recording and display device, and an information processing device that is input from the overload prevention device and the clock and outputs the signal to the recording and display device. The machine working state, operator machine operating state, machine setting state, and machine working system information of time are continuously recorded as a recording unit period from the time when the machine working system danger signal is input to the time when the machine working system danger signal is input. And recording danger information indicating a danger state of the construction machine on the recording and display device based on the contents. Work status recording device for construction machinery. 2. An overload prevention device for detecting a machine working state, an operator's machine operating state and a machine setting state and outputting a machine state signal, an operator machine operating signal and a setting state signal, and a machine working system danger signal. A traveling system danger signal output device that detects a traveling state, an operator's traveling operation state and a traveling setting state, and outputs a traveling state signal, an operator traveling operation signal, a traveling setting state signal, and a mechanical traveling system danger signal, and outputs a time signal. Clock, a recording and display device, an overload prevention device, a clock and an information processing device that is input from a clock and a traveling system danger signal output device and output to the recording and display device are provided in the construction machine, and the information processing device is At least one of the machine operation danger signal from the overload prevention device and the machine operation danger signal from the traveling system danger signal output device. The time from when the system danger signal is input to when it disappears is the recording unit period, and the machine working state, the operator machine operating state, the device setting state, and the machine working system information of the time and the machine running state, the operator running state, At least machine working system information of the running setting state and time machine running system information are continuously recorded, and the danger information representing the danger state of the construction machine is recorded and displayed based on the contents. A work condition recording device for a construction machine, wherein the device is configured to be displayed on the device. 3. The information processing apparatus according to claim 1, further comprising a memory for continuously recording the information relating to the latest dangerous state, and for recording information before that as a history of predetermined information items. 3. A working state recording device for a construction machine according to claim 1. 4. The work status recording device for a construction machine according to claim 1, wherein the information processing device includes an output port through which the recorded information can be led to an external device such as a personal computer. .