JP6729211B2 - Crane information presentation system - Google Patents

Description

The present invention relates to a crane information presentation system.

The crane includes a wire rope for hoisting and unwinding a suspended load, and a wire rope for hoisting a hoisting member such as a boom. These wire ropes deteriorate due to the load associated with crane work. Therefore, it is desirable to manage the deterioration of the wire rope and let the user know when to replace it.

Patent Document 1 detects the rotation amount of a drum of a hoisting winch of a crane, calculates the winding layer and winding train of the rope remaining on the drum from the detected rotation amount, and calculates the winding layer and winding train of the calculated rope. A system for displaying a number on a display unit is disclosed.

Japanese Patent Application Laid-Open No. 2004-242242 discloses a detection signal from a first detector that detects the winding and unwinding of a rope wound around a hoisting winch drum and a second detector that detects the movement amount of the rope, before the work. The lift characteristic is calculated and registered in the memory circuit. Then, Patent Document 2 discloses a technique in which, during the operation, the lift corresponding to the detection signal from the first detector is read from the storage circuit and displayed on the display.

Patent Document 3 discloses a winding layer number indicating which position of the suspension rope is paid out from the layer in contact with the outer circumference of the drum, and a column number indicating the number of the line where the hanging rope is paid out from the end of the drum. A technique for determining the amount of movement of the suspension rope and determining the depth of the work implement or the hook will be disclosed in consideration of and.

JP-A-11-240689 JP-A-8-192991 JP-A-4-38394

However, there is no conventional technique that presents information that serves as a guide for determining when to replace the wire rope. Therefore, in the above-mentioned conventional technique, if the elapsed time after the wire rope is attached to the winch drum, or the operating time of the crane reaches the specified time, it is determined that it is time to replace the wire rope. I had no choice.

Therefore, although the wire rope is not deteriorated so much that it actually needs to be replaced, there is a problem that the wire rope is replaced early and the economic burden increases. On the contrary, there is a problem in that the wire rope is not exchanged even though the wire rope is deteriorated and the safety is poor.

In addition, the crane has a plurality of wire ropes such as a hanging rope and a undulating rope, and each has a problem that they are uniformly replaced despite different use times and different degrees of deterioration.

An object of the present invention is to provide an information presentation system that presents information that serves as a guideline for appropriately determining the replacement time of a wire rope.

An information presenting system according to an aspect of the present invention is a crane that includes a winch that winds a wire rope that suspends an object through at least one sheave, and is an information presenting system that presents information about the wire rope. A load calculation unit that calculates a load index value that is an index value of a load applied to the wire rope, and a passage length of the wire rope with respect to the sheave in each section when the wire rope is divided into a plurality of sections is a reference value. The number of times of bending and stretching, which is the number of times over, counting unit that counts according to the calculated load index value, and based on the count result by the counting unit, bending and stretching for each section according to the load index value. a statistical information generating unit that generates statistical information indicating the number of times, e Bei a presentation unit for presenting the statistical information the generated, the counting unit, of the wire rope in the middle of the certain section to pass through the sieve When the winding direction is switched and the total passing length of the sheave in the section exceeds the reference value, the section is not counted.

According to this aspect, the number of times the wire rope passes through the sheave for each section is the number of times of bending and stretching which is the number of times exceeding the reference value, and the number of times of bending and stretching according to the load index value is counted. Then, based on the count result, statistical information indicating the number of times of bending and stretching for each section according to the load index value is generated, and the generated statistical information is presented.

When the wire rope passes through the sheave, the outside is pulled and the inside is contracted to bend and extend along the arc of the sheave, and then the bend and extension are released. In this way, when bending and stretching and releasing of bending and stretching continue, metal fatigue of the wire rope progresses. Therefore, the statistical information obtained by counting the number of times of bending and stretching for each section of the wire rope according to the load index value indicates which section of the wire rope has deteriorated and to what extent.

Therefore, the user can grasp the bias of the fatigue of the wire rope based on the statistical information, and determine the appropriate time to replace the wire rope. As a result, in this aspect, it is possible to avoid the situation in which the wire rope is forced to be replaced even though the wire rope is not deteriorated, and it is possible to reduce the economic burden and efficiently use resources. Further, in this aspect, it is possible to prevent the continued use of the deteriorated wire rope and ensure safety.

In addition, since this statistical information is information generated from actual crane data, not experimental data obtained by a test machine, highly reliable statistical information can be provided.

In the above aspect, the statistical information generation unit identifies which load category the calculated load index value belongs to among a plurality of predetermined load categories, and which corresponds to the identified load category. Information indicating the number of times of bending and stretching for each section may be generated as the statistical information.

In this aspect, since the statistical information indicating the number of bending and stretching for each section in which the load index value is divided into the load sections is presented to the user, the statistics indicating the number of bending and stretching according to the load section and the section in, for example, a table format. Information can be presented to the user. As a result, it is possible to present statistical information that is easy for the user to understand.

In the above aspect, the wire rope is attached to the undulating member of the crane,
The wire rope is hung around multiple sheaves,
The information presentation system,
A posture detection unit that detects the posture of the working device,
Further comprising a payout length calculation unit for calculating a payout length index value that is an index value of the length of the wire rope paid out from the winch,
The counting unit calculates the position of each sheave on the wire rope based on the calculated feeding length index value, the detected posture, and the number of sheaves of the sheave, and for each section for each sheave. May be calculated.

According to this aspect, the position of the sheave is calculated based on the feeding length index value, the posture of the undulating member, and the number of hooks. Here, the position of the sheave on the wire rope paid out from the winch can be uniquely specified if the payout length of the wire rope, the posture of the undulating member, and the number of hooks are known. Therefore, in this aspect, the position of the sheave on the wire rope can be accurately calculated.

In the above aspect, the information presentation system includes an information processing device and a server connected to the information processing device via a network,
The information processing device includes the load calculation unit and the counting unit,
The server includes the statistical information generation unit,
The information processing apparatus may accumulate the counting result by the counting unit, and transmit the accumulated counting result to the server every time a certain period of time elapses.

According to this aspect, since the count result is transmitted to the server every time a certain period of time has passed, the server does not need to access the information processing device every time one count result is obtained. Therefore, the communication load between the server and the information processing device can be reduced.

In the above aspect, it is preferable that the reference value is at least ¼ of the circumference of the sheave.

If the wire rope has a small passage length when passing through the sheave, the bending and stretching that occurs is small, so it is not appropriate to count it as the number of bending and stretching. In this aspect, the reference value is set to at least 1/4 of the circumference of the sheave. Therefore, in this aspect, it is possible to avoid the situation where the number of times of bending and stretching is counted up even though the length of passage of the wire rope is short. As a result, in this aspect, it is possible to calculate the number of times of bending and stretching, which accurately indicates the deterioration of the wire rope.

According to the present invention, it is possible to present information that serves as a guideline for appropriately determining the replacement time of a wire rope.

It is a figure which shows the whole structure of the crane to which the information presentation system by embodiment of this invention was applied. It is a figure which shows the schematic whole structure of an information presentation system. It is a figure which shows the structure of the information processing apparatus, server, and terminal shown in FIG. It is a figure which shows the relationship between the number of sheaves and the hoisting speed. It is a figure which shows the relationship between the number of sheaves and the hoisting speed. It is a figure showing the 1st example of the case where the number of times of bending and stretching is counted. It is a figure showing the 2nd example of the case where the number of times of bending and stretching is counted. It is a figure showing the case where the number of times of bending and stretching is not counted. It is a figure which shows the positional relationship of a suspension rope and each sheave. It is a figure which shows the positional relationship of a suspension rope and each sheave. It is a figure which shows a mode that a passage length is calculated. It is a figure which shows the data structure of the statistical information table with which the statistical information was registered. It is a figure which shows the 1st example of a distribution map of the number of times of bending and stretching. It is a figure which shows the 2nd example of a distribution map of the number of times of bending and stretching. It is a figure which shows the 3rd example of the distribution chart of the number of times of bending and stretching. It is an explanatory view of erection work. It is an explanatory view of basic civil engineering work. It is a flowchart which shows the process of an information presentation system. It is a flow chart which shows generation processing of daily report data and monthly report data by a data logger. 9 is a block diagram showing an example of a configuration of an information presentation system 1 according to Modification 1. FIG. It is a figure which shows an example of the data structure of the state history table in which the state history of the hanging rope was accumulated. It is a figure which shows the data structure of the bending and stretching history table with which the bending and stretching history was registered. It is a figure which shows an example of a distribution chart of the number of times of two-dimensional bending and stretching.

FIG. 1 is a diagram showing an overall configuration of a crane 2 to which an information presentation system 1 according to an embodiment of the present invention is applied. The crane 2 is provided with a self-propelled lower traveling unit 40 and an upper revolving unit 46 mounted on the lower traveling unit 40 so as to be rotatable around the vertical axis.

The upper swing body 46 is provided with a working device 50 for performing a crane work. The working device 50 includes a boom 51 as a hoisting member, a mast 52, a gantry 53, a mast side spreader 55, a gantry side spreader 56, a hoisting winch 61, a hoisting winch 62, and a hook device 64. The hanging rope 66, the undulating rope 67, and the guy line 68 are included.

The boom 51 is attached to the front part of the upper swing body 46 so that it can be raised and lowered. A top sheave 51a is provided on the front side of the tip of the boom 51. An idler sheave 51b is provided on the rear side of the tip of the boom 51.

The mast 52 is provided at a position behind the boom 51 in the upper swing body 46. The mast 52 is provided so as to be rotatable around its lower end as a fulcrum. A mast side spreader 55 is provided at the upper end of the mast 52. The tip of the mast 52 is connected to the tip of the boom 51 via a guy line 68.

The gantry 53 is erected on the upper swing body 46 at a position further rearward of the mast 52, that is, at a rear portion of the upper swing body 46. A gantry-side spreader 56 is provided on the upper end of the gantry 53.

The hoisting winch 61 is an example of a winch according to the present invention, and is mounted on the upper swing body 46. The hoisting winch 61 has a hoisting drum 61a around which a hanging rope 66 which is a wire rope is wound. The suspension rope 66 fed from the hoisting drum 61a extends to the tip of the boom 51, and hangs down from the tip of the boom 51 via the idler sheave 51b and the top sheave 51a. A hook device 64 is suspended at the tip of the suspension rope 66. The hook device 64 suspends the suspended load 100. The hook device 64 includes a hook sheave (not shown), and a hanging rope 66 is hung on the hook sheave and the top sheave 51a with a predetermined number of hooks.

The hoisting winch 61 performs hoisting and unwinding of the hook device 64 and the suspended load 100 suspended by the hook device 64 by rotating the hoisting drum 61a and winding up and unwinding the hanging rope 66.

The undulating winch 62 is another example of the winch according to the present invention, and is provided below the gantry 53. The undulating winch 62 has an undulating drum 62a (an example of a drum) around which an undulating rope 67 that is a wire rope is wound. The hoisting rope 67 fed from the hoisting drum 62 a is wound around the sheave of the gantry side spreader 56 and the sheave of the mast side spreader 55. The hoisting winch 62 draws the mast side spreader 55 toward the gantry side spreader 56 by rotating the hoisting drum 62a and winding the hoisting rope 67. As a result, the mast 52 rotates rearward, pulls the tip end portion of the boom 51 rearward via the guy line 68, and erects the boom 51. Further, the hoisting winch 62 causes the mast side spreader 55 to be separated from the gantry side spreader 56 forward by rotating the hoisting drum 62 a and feeding the hoisting rope 67. As a result, the mast 52 rotates forward and the boom 51 is laid down.

4 and 5 are views showing the relationship between the number of sheaves and the hoisting speed. In the case of a single hanging, in which the number of hangings is one, the hanging rope 66 is directly attached to the hook device 64 via the top sheave 51a. In this case, the hoisting speed of the hook device 64 is the same as the hoisting speed V1 of the hoisting drum 61a. On the other hand, in the case of the five-hanging number of five, the hanging rope 66 alternately reciprocates between the three top sheaves 51a and the two hook sheaves 51c. In this case, the hoisting speed of the hook device 64 is ⅕ of the hoisting speed V1 of the hoisting drum 61a.

FIG. 5 shows the case of 9-line multiplication with the number of multiplications being 9. In this case, the suspension rope 66 alternately reciprocates between the five top sheaves 51a and the four hook sheaves 51c. For example, in order to lift a suspended load of 55 tons using the suspension rope 66 with a safety load of 6.6 tons, 55/6.6=8.3, so a minimum of 9 times of suspension is required. Therefore, in the example of FIG. 5, the 55t suspended load can be safely wound up.

The information presentation system 1 according to the present embodiment presents information that serves as a guide for determining the replacement timing of the suspension rope 66 and the undulation rope 67 of the crane 2 as described above. FIG. 2 is a diagram showing a schematic overall configuration of the information presentation system 1.

The information presentation system 1 acquires and presents information about a plurality of cranes 2. As shown in FIG. 2, the information presentation system 1 includes an information processing device 4 mounted on each crane 2, a server 10, and a terminal 14. The information processing device 4 and the server 10 are connected, for example, via a mobile phone network 6. The server 10 and the terminal 14 are connected via, for example, the Internet communication network 12. The information processing device 4 acquires various kinds of information about the crane 2 on which the information processing device 4 is mounted.

FIG. 3 is a diagram showing the configurations of the information processing device 4, the server 10, and the terminal 14 shown in FIG. The information processing device 4 includes a sensor unit 18, an overload prevention device 19, a first controller 21, a second controller 22, an ECU (Engine Control Unit) 24, and a data logger 28. The overload prevention device 19, the first controller 21, the second controller 22, and the ECU 24 are communicatively connected to each other via a CAN (Control Area Network) bus 30. Although the CAN bus 30 is adopted here, if a network other than CAN is adopted as the vehicle-mounted network, a bus complying with the standard of the network may be adopted instead of the CAN bus 30.

The sensor unit 18 includes a plurality of sensors that detect values related to the operation of each operating unit of the crane 2. Specifically, the sensor unit 18 includes a rotation amount sensor 41, a rotation amount sensor 42, a load sensor 43, a load sensor 44, and an angle sensor 45.

The rotation amount sensor 41 includes, for example, a proximity sensor and a processing unit, detects the rotation amount of the hoisting drum 61a in a predetermined control cycle (for example, several hundred msec), and outputs it to the first controller 21. The rotation amount sensor 42 includes, for example, a proximity sensor and a processing unit, detects the rotation amount of the undulating drum 62a in a control cycle, and outputs the rotation amount to the second controller 22.

The rotation amount sensor 41 includes, for example, a pair of proximity sensors. The pair of proximity sensors is composed of a pair of magnetic sensors that detect a convex portion of a gear that is provided coaxially with the rotating shaft of the hoisting drum 61a. The pair of proximity sensors are arranged side by side in the circumferential direction of the gear, and output a pulse signal including a pulse corresponding to the number of detected convex portions of the gear. Therefore, the processing unit of the rotation amount sensor 41 can detect the rotation amount of the hoisting drum 61a by counting the number of pulses included in this pulse signal. Further, since the pair of proximity sensors are arranged side by side in the circumferential direction of the gear, the processing unit of the rotation amount sensor 41 determines the proximity of the hoisting drum 61a depending on which proximity sensor outputs the pulse signal first. The direction of rotation can be detected. Therefore, the processing unit of the rotation amount sensor 41 may calculate a rotation amount that distinguishes the rotation direction of the hoisting drum 61a by plus and minus, and output the rotation amount to the first controller 21.

The above also applies to the rotation amount sensor 42. A rotary encoder or a resolver may be used as the rotation amount sensors 41 and 42.

The load sensor 43 is composed of, for example, a load cell, detects a load applied to the hoisting drum 61a in a control cycle, and outputs load data indicating the detected load to the overload prevention device 19. The load sensor 44 is composed of, for example, a load cell, detects a load applied to the undulating drum 62a in a control cycle, and outputs load data indicating the detected load to the overload prevention device 19.

The angle sensor 45 detects a boom angle indicating the attitude of the boom 51 and outputs the boom angle to the overload prevention device 19 in a control cycle. Specifically, the angle sensor 45 is provided at a boom point, which is an end of the boom 51 on the upper swing body 46 side.

In the example of FIG. 3, the sensor unit 18, the first controller 21, the second controller 22, and the overload prevention device 19 are connected via a dedicated signal line, but this is an example. The sensor unit 18 may be connected to the CAN bus 30.

The overload prevention device 19 is composed of, for example, a microcontroller and prevents the load applied to the work device 50 from being overloaded during crane work. The overload prevention device 19 includes a load calculation unit 191. The load calculator 191 calculates the actual load applied to the suspension rope 66 based on the load data of the hoisting drum 61a detected by the load sensor 43. Then, the overload prevention device 19 calculates the ratio of the actual load applied to the suspension rope 66 to the rated load of the suspension rope 66 as the load factor of the suspension rope 66.

The rated load is calculated using, for example, the boom angle indicating the current attitude of the boom 51, the type of attachment attached to the boom 51, the number of hooks of the suspension rope 66 on the sheave, and the working radius. .. The type and number of attachments are determined, for example, from the data previously input by the user. The working radius is determined, for example, from the boom angle and the total length of the boom 51.

Similarly, the overload prevention device 19 calculates the actual load applied to the undulating rope 67 based on the load data of the undulating drum 62a output from the load sensor 44. Then, the overload prevention device 19 calculates the ratio of the actual load applied to the undulating rope 67 to the rated load of the undulating rope 67 as the load factor of the undulating rope 67. The load factors of the hanging rope 66 and the undulating rope 67 correspond to an example of load index values.

When the load factor of the suspension rope 66 or the load factor of the undulating rope 67 exceeds a predetermined load factor upper limit value (for example, 105%), the overload prevention device 19 determines that an overload condition has occurred and determines that the crane Stop the operation of 2. In addition, when the actual load of the suspension rope 66 exceeds the rated load of the suspension rope 66, or when the actual load of the undulation rope 67 exceeds the rated load of the undulation rope 67, the overload prevention device 19 detects an overload state. It may be determined that it has occurred.

The first controller 21 is composed of, for example, a microcontroller and controls the hoisting winch 61. The first controller 21 includes a payout length calculation unit 211.

The payout length calculation unit 211 calculates the payout length, which is the length of the suspension rope 66 paid out from the hoisting drum 61a, from the rotation amount detected by the rotation amount sensor 41. The payout length calculation unit 211 calculates the payout length of the suspension rope 66 in a control cycle (for example, several hundred msec).

Here, the payout length calculation unit 211 uses the conversion information indicating the correlation between the rotation amount of the hoisting drum 61a and the winding layers and winding rows of the suspension rope 66 wound on the hoisting drum 61a. The payout length of the hanging rope 66 may be calculated by calculating the remaining amount of the hanging rope 66 remaining on the drum 61a and subtracting the calculated remaining amount from the total length of the hanging rope 66.

The second controller 22 is composed of, for example, a microcontroller, and controls the undulating winch 62. The second controller 22 includes a payout length calculation unit 221.

The feeding length calculation unit 221 calculates the feeding length, which is the length of the undulating rope 67 fed from the undulating drum 62a, from the rotation amount detected by the rotation amount sensor 42. The feeding length calculation unit 221 calculates the feeding length of the undulating rope 67 in a control cycle (for example, several hundred msec).

Here, the payout length calculation unit 221 uses the conversion information indicating the correlation between the rotation amount of the undulating drum 62a and the winding layer and winding sequence of the undulating rope 67 wound around the undulating drum 62a, to determine the undulating drum 62a. The payout length of the undulating rope 67 may be calculated by calculating the remaining amount of the remaining undulating rope 67 and subtracting the calculated remaining amount from the total length of the undulating rope 67.

The ECU 24 is composed of, for example, a microcontroller and controls the rotation speed of the engine of the crane 2.

The first controller 21 outputs the payout length of the suspension rope 66 calculated by the payout length calculation unit 211 to the CAN bus 30 in a control cycle. The second controller 22 outputs the payout length of the undulating rope 67 calculated by the payout length calculation unit 221 to the CAN bus 30 in a control cycle. The overload prevention device 19 outputs the rated load, the actual load, and the load factor of the suspension rope 66 and the undulating rope 67 to the CAN bus 30 in a control cycle, and outputs the boom angle to the CAN bus 30 in a control cycle.

The data logger 28 is composed of, for example, a microcontroller, and acquires and stores various data flowing through the CAN bus 30. The data logger 28 includes a counting unit 281 and a memory 282.

The counting unit 281 takes in the payout length, the rated load, the actual load, and the load factor of the suspension rope 66, which are output to the CAN bus 30 in the control cycle, from the CAN bus 30 and the boom angle from the CAN bus 30. Then, the counting unit 281 stores the captured data in the memory 282 in association with each other. As a result, a state history in which the payout length, rated load, load factor, and boom angle of the suspension rope 66 are associated in time series is accumulated in the memory 282.

FIG. 21 is a diagram showing an example of the data structure of the state history table T19 in which the state history of the suspension rope 66 is accumulated. As shown in FIG. 21, in the state history table T19, one state history is assigned to one record. The state history is data in which “date and time”, “feed length”, “rated load”, “actual load”, “load factor”, and “boom angle” are associated with each other. “Date and time” indicates the date and time when the state history was acquired. The "feed length", "rated load", "actual load", "load factor", and "boom angle" have been described above, and therefore description thereof will be omitted.

Further, the counting unit 281 also takes in the payout length, the rated load, the actual load, and the load factor of the undulating rope 67 from the CAN bus 30, and stores them in the memory 282 in association with the boom angle. As a result, like the suspension rope 66, the state history of the undulating rope 67 is accumulated in the memory 282. The state history of the undulating rope 67 is also accumulated in the memory 282 in a table format, like the state history table T19 of the suspension rope 66 shown in FIG.

Referring back to FIG. The counting unit 281 counts the number of times of bending and stretching, which is the number of times the passage length of the suspension rope 66 with respect to the sheave in each section when the suspension rope 66 is divided into a plurality of sections, exceeds a reference value, according to the load factor. .. The counting unit 281 counts the number of times of bending and stretching of the undulating rope 67 according to the load factor, as in the suspension rope 66.

FIG. 6 is a diagram showing a first example of a case where the number of times of bending and stretching is counted. In the example of FIG. 6, a state where the wire rope 602, which is the suspension rope 66 or the undulation rope 67, passes through the sheave 601 is shown.

The wire rope 602 is composed of a plurality of metal element wires. When the wire rope 602 passes through the sheave 601, the outside is pulled and the inside is contracted to be bent and stretched along the arc of the sheave 601, and then the bending and stretching are released. In this way, when bending and stretching and releasing of bending and stretching continue, metal fatigue of the wire rope 602 progresses. Therefore, by counting the number of times of bending and stretching for each section of the wire rope 602, it is possible to know how much the wire rope 602 has deteriorated.

Therefore, the counting unit 281 counts the number of times of bending and stretching for each section of the wire rope 602. Here, the counting unit 281 counts 1 every time the passing length of the sheave 601 in a certain section moves, for example, ¼ round of the sheave 601.

In the example of FIG. 6, the sheave 601 is rotating clockwise. In the section (A), the tip of the section R1 reaches the sheave 601. In the section (B), the sheave 601 rotates 90 degrees with respect to the section (A), and the tip of the section R1 reaches the top of the sheave 601. As a result, the passing length of the sheave 601 in the section R1 becomes 1/4 round, so the number of bending and stretching in the section R1 is counted by one. In the section (C), the sheave 601 further rotates 90 degrees with respect to the section (B), and the tip of the section R1 reaches the right end of the sheave 601. As a result, the number of bending and stretching in the section R1 is further counted by 1. Therefore, in the example of FIG. 6, the number of times of bending and stretching in the section R1 is two.

FIG. 7 is a diagram showing a second example of the case where the number of times of bending and stretching is counted. Also in the example of FIG. 7, the sheave 601 is rotating clockwise. In the example of FIG. 7, the section R1 includes small sections R11, R12, and R13 in order from the tip. The small sections R11 to R13 are sections each having a length of one round of the sheave 601.

In the section (A), the tip of the small section R11 reaches the sheave 601. In the section (B), the sheave 601 rotates one round with respect to the section (A), and the rear end of the small section R11 reaches the right end of the sheave 601. In the section (C), the sheave 601 rotates two more turns with respect to the section (B), and the rear end of the small section R13 reaches the right end of the sheave 601. Therefore, in the case of FIG. 7, since the passage length of the sheave 601 in the section R1 is three turns of the sheave 601, the number of times of bending and stretching for the section R1 is 12 (=3×4).

FIG. 8 is a diagram showing a case where the number of times of bending and stretching is not counted. In the section (A), the tip of the section R1 reaches the sheave 601. In the section (B), the sheave 601 rotates clockwise about 45 degrees with respect to the section (A). In the section (C), the sheave 601 rotates counterclockwise about 45 degrees with respect to the section (B). As described above, in the example of FIG. 8, the total passing length of the sheave 601 in the section R1 is 1/4 round of the sheave 601, but the direction is switched in the middle. In this case, the counting unit 281 does not count the number of times of bending and stretching in the section R1. This is based on the idea that the wire rope 602 does not deteriorate so much unless the passage length of the wire rope 602 with respect to the sheave 601 is more than a certain distance in one direction (here, a quarter of the sheave 601). Is based. The direction of the wire rope (winding direction, winding direction) can be determined from the tilting direction of the operation lever (not shown), for example.

Here, in order to determine which section on the wire rope 602 has passed which sheave 601, the counting unit 281 needs to know the position of the sheave 601 on the wire rope 602.

9 and 10 are views showing the positional relationship between the suspension rope 66 and each sheave. In FIG. 9, the x-axis shows the direction parallel to the ground, and the y-axis shows the direction orthogonal to the ground. Further, in FIG. 9, the x-axis is positive on the right side and negative on the left side, and the y-axis is positive on the upper side and negative on the lower side.

The distance Z1 of the idler sheave 51b in the x-axis direction with respect to the boom point P91 is represented by the equation (1) using the boom angle θb detected by the angle sensor 45.

Z1=Li·cos(θb+θis) (1)
Li is a distance between the boom point P91 and the center of the idler sheave 51b (hereinafter, referred to as “idle sheave point P93”) and is known. θis is an angle formed by the boom center line L91 and the distance Li and is known. Lb is a boom length Lb, and passes on the boom center line L91 of the boom 51.

The distance Z2 of the idler sheave 51b in the y-axis direction with respect to the boom point P91 is represented by the equation (2) using the boom angle θb detected by the angle sensor 45.

Z2=Li·sin(θb+θis) (2)
The distance Z3 between the center of the hoisting drum 61a (hereinafter referred to as "hoisting drum point P92") and the idler sheave point P93 is represented by the equation (3) using the distance Z1 and the distance Z2.

Z3=√((Z1+Fdx) ² +(Z2-Fdy) ² ) (3)
Fdx is the distance between the boom point P91 and the hoisting drum point P92 in the x-axis direction, and is known. Fdy is the distance between the boom point P91 and the hoisting drum point P92 in the y-axis direction, and is known.

The distance hkf assuming the length of the suspension rope 66 between the hoisting drum 61a and the idler sheave 51b is expressed by the equation (4) using the distance Z3.

hkf=√(Z3 ² −(Pcd/2) ² ) (4)
Pcd is a value obtained by adding the thickness of the layer of the suspension rope 66 wound around the hoisting drum 61a to the diameter of the hoisting drum 61a, and is uniquely determined by the crane model and the hoisting layer.

Referring to FIG. 10, the tip (rope end E1) of the hanging rope 66 is located at a hook sheave point P96 at the center of the hook sheave 51c.

In FIG. 10, the angle θpe is an angle formed by the rope end E1 and the boom center line L91 with the boom point P91 as a reference, and is known. The distance Lpe is the length between the top sheave point P94 and the rope end E1 and is known. The distance Liy is a distance between the idler sheave point P93 and the boom center line L91, and is known.

The distance hpe, which is a component orthogonal to the ground at the distance Lpe, is expressed by the following equation (5).

hpe=Lpe×sin(θb−θpe) (5)
The amount of change Lch1 of the suspension rope 66 is expressed by the following equation (6) when the number of suspensions nf of the suspension rope 66 is odd, and by the following equation (7) when the number of suspensions nf of the suspension rope 66 is even. expressed.

Lch1=hkf/nf (6)
Lch1=((hkf)-(hpe))/nf (7)
Thus, since Li, θis, Fdx, and Fdy are known, the distance hkf can be calculated when the boom angles θb and Pcd are known. Further, Pcd can be calculated from the rotation amount of the hoisting drum 61a. Therefore, the counting unit 281 acquires the boom angle θb and the rotation amount of the hoisting drum 61a for each control cycle, and obtains the distance hkf.

Further, since the boom lengths Lb, θis, θpe, Lpe, and the number of hooks nf are known, if the payout length of the suspension rope 66 and the distance hkf are known, the idler sheave 51b, the top sheave 51a, and the hook sheave on the suspension rope 66 are known. The position of 51c can be specified.

Therefore, the counting unit 281 is provided with a position information table in which the position of each sheave on the suspension rope 66 according to the distance hkf and the feeding length of the suspension rope 66 is predetermined. Then, the counting unit 281 calculates the position on the suspension rope 66 of each sheave corresponding to the calculated length hkf and the payout length of the suspension rope 66 acquired from the payout length calculation unit 211 for each control cycle by using the position information table. It may be determined by referring to it.

The position information table may adopt, as the position of each sheave, for example, one point (for example, one end or the other end) on the region where each sheave and the wire rope contact each other, or each sheave and wire rope may be adopted. Two points (one end and the other end) that define the contact area may be adopted.

Alternatively, if the initial position of each sheave on the suspension rope 66 is known, the current position of each sheave can be specified by increasing or decreasing the variation Lch1 with respect to the initial position. Therefore, the counting unit 281 obtains the initial position of each sheave of the suspension rope 66 using the position information table, thereafter obtains the variation amount Lch1 for each control cycle, and increases or decreases the current position of each sheave with the obtained variation amount Lch1. By doing so, the position of each sheave may be determined.

The counting unit 281 may also determine the position of each sheave on the undulating rope 67 using the same method as that of the suspension rope 66.

The counting unit 281 time-sequentially tracks the position of each sheave calculated from when the hoisting or unwinding operation is input to when the shelving operation is stopped, and determines the passing length of each wire rope section for each sheave. calculate. Here, the section is, for example, an area obtained by dividing the wire rope at a predetermined interval (for example, every 10 m) from the tip.

FIG. 11 is a diagram showing how the passage length is calculated. The upper part of FIG. 11 shows the start time of the hoisting operation, and the lower part of FIG. 11 shows the end time of the hoisting operation. In FIG. 11, sections Rn, Rn+1, Rn+2, and Rn+3 indicate the nth, n+1, n+2, and n+3th sections, respectively. Note that n is an arbitrary integer.

As shown in the upper row, at the start of the hoisting operation, the first sheave is located at position P11 and the second sheave is located at position P21. Further, as shown in the lower part, at the end of the hoisting operation, the first sheave is located at the position P11' and the second sheave is located at the position P21'.

The wire rope passes over the section Rn and the section Rn+1 for the first sheave, and passes over the section Rn+2 and the section Rn+3 for the second sheave. Therefore, the counting unit 281 tracks the passage length L11 of the first sheave in the section Rn and the passage length L12 of the first sheave in the section Rn+1. Further, the counting unit 281 tracks the passage length L21 of the second sheave in the section Rn+2 and the passage length L22 of the second sheave in the section Rn+3, respectively.

Then, the counting unit 281 counts as the number of times of bending and stretching in the section Rn, for example, every time the passage length L11 becomes 1/4 round of the first sheave. The counting unit 281 counts the number of times of bending and stretching for the other passage lengths L12, L21, L22 as well as the passage length L11. Then, the counting unit 281 stores the number of times of bending and stretching for each section in the memory 282 in association with the load factor at that time. Hereinafter, the data in which the number of bending and stretching for each section and the load factor are associated with each other will be described as a bending and stretching history. Here, since the suspended load does not change during one winding operation or one winding operation, the load factor can be regarded as constant. Therefore, the count unit 281 stores the number of bending and stretching according to the load factor by storing the number of bending and stretching for each section in one winding or unwinding operation in the memory 282 in association with the load factor at that time. You can count.

FIG. 22 is a diagram showing a data structure of a bending and stretching history table T20 in which bending and stretching history is registered. In the bending/stretching history table T20, one bending/stretching history is assigned to one record. The bending and stretching history is, for example, data in which “date and time”, “number of times of bending and stretching”, and “load factor” are associated with each other. “Date and time” indicates the date and time when the number of bending and stretching is calculated. The “number of times of bending and stretching” indicates the number of times of bending and stretching for each section, for example, “section R1: 1 time, section R2: 3 times, section R3: 4 times”. The “load factor” indicates the load factor when the number of bending and stretching is calculated.

Referring back to FIG. For example, the data logger 28 transmits history information and bending history for a certain period accumulated in the memory 282 to the server 10 after a certain period has elapsed.

The server 10 includes a statistical information generation unit 101. The statistical information generation unit 101 generates statistical information indicating the number of times of bending and stretching for each section according to the load factor, based on the bending and stretching history transmitted from the data logger 28.

Specifically, the statistical information generation unit 101 identifies which load category the load factor included in the bending and stretching history belongs to among a plurality of predetermined load categories, and responds to the identified load category. The number of bending and stretching for each section is generated as statistical information.

FIG. 12 is a diagram showing a data structure of the statistical information table T11 in which statistical information is registered. The statistical information table T11 is a table in which “load factor” and “bending and stretching times” are associated with each other. The “load factor” is divided into a plurality of load categories. In the example of FIG. 12, the load factor (=m) is “m<5%”, “5%≦m<60%”, “60%≦m<90%”, “90%≦m<105%”. , “105%≦m” are divided into five load categories. In the example of FIG. 12, the wire rope has a total length of 600 m and is divided into 60 sections R1 to R60 every 10 m. Then, in each cell of the statistical information table T11, the cumulative value of the bending and stretching times corresponding to the load classification and the section is stored.

The statistical information generation unit 101 specifies, for one bending and stretching history, a cell corresponding to a load section to which a load factor included in the bending and stretching history belongs and a section included in the bending and stretching history, and in the specified cell, The statistical information table T11 may be generated by voting the corresponding number of times of bending and stretching.

For example, if the load factor is "50%" and there is a bending and stretching history of the number of times of bending and stretching "section R1: 1 time, section R3: 1 time, section R4: 2 times", load category "5%≤m< The bending and stretching times currently registered in the three cells corresponding to “60%” and the sections “R1”, “R3”, and “R4” are “1 time”, “1 time”, and “2 times”, respectively. Will be increased.

The statistical information generating unit 101 generates a distribution map of the number of times of bending and stretching based on the generated statistical information table T11.

FIG. 13 is a diagram showing a first example of a distribution diagram of the number of times of bending and stretching. In FIG. 13, the vertical axis represents the cumulative number of bending and stretching, the depth axis represents the load factor, and the horizontal axis represents the section. In the example of FIG. 13, in the load classification of “m<5%”, “60%≦m<90%”, and “90%≦m<105%”, bending and stretching of five sections of “110 m to 150 m” are performed. It is shown that the cumulative number is large. Therefore, it can be seen that the deterioration in these five sections is more advanced than in the other sections. In this way, the distribution chart of the number of times of bending and stretching shows the cumulative number of times of bending and stretching for each section according to the load factor, so that the user can easily see at which position of the wire rope the deterioration is progressing. Can be recognized by.

FIG. 14 is a diagram showing a second example of a distribution diagram of the number of times of bending and stretching. FIG. 14 shows a distribution diagram of the number of times of bending and stretching when the crane 2 performs a erection work. FIG. 16 is an explanatory diagram of the erection work. In the erection work, the crane 2 repeats the work of hoisting the suspended load 1501 from the ground to a height of several tens m to several hundred m.

Therefore, in the distribution chart of the bending and stretching times in the erection work, as shown in FIG. 14, there is a tendency that the cumulative value of the bending and stretching times is concentrated in a specific section (here, 170 m to 200 m).

FIG. 15 is a diagram showing a third example of a distribution diagram of the number of times of bending and stretching. FIG. 15 shows a distribution diagram of the number of times of bending and stretching when the crane 2 performs basic civil engineering work. FIG. 17 is an explanatory diagram of basic civil engineering work. In the basic civil engineering work, the crane 2 repeats the work of burying the rod-shaped bodies 1601 in the ground at regular intervals in a constant direction. Therefore, the movement amount of the wire rope is not so large as that of the erection work.

Therefore, in the distribution chart of the number of bending and stretching in the basic civil engineering work, as shown in FIG. 15, there is a tendency that the number of bending and stretching is concentrated in a specific section (120 m to 140 m) narrower than the erection work.

In this way, the distribution diagram of the number of times of bending and stretching shows the characteristics of the work mainly performed by the crane 2, so that not only the degree of deterioration of the wire rope but also the work history of the crane 2 can be determined.

FIG. 18 is a flowchart showing the processing of the information presentation system 1. In FIG. 18, the first column shows the process of the ECU 24, the second column shows the process of the first controller 21 and the second controller 22 (hereinafter, both are collectively referred to as “MC”), and the third column. Indicates the processing of the overload prevention device 19 (ML), and the fourth column shows the processing of the data logger 28.

First, when the user turns on the ignition key of the crane 2, the ECU 24, the MC, and the overload prevention device 19 are turned on (S101, S111, S121). The data logger 28 is directly connected to the battery (not shown) of the crane 2 and is constantly supplied with electric power. When the ignition key is off, the data logger 28 is in the power saving mode (S131). Then, when the ignition key is turned on, the power saving mode is returned to the normal mode (S132). In addition, the data logger 28 returns from the power saving mode to the normal mode when an incoming call request from the mobile phone communication network or a periodic timer interrupt occurs.

When the ECU 24 is turned on (S101), the engine (not shown) is started (S102), and engine operation information is periodically output to the CAN bus 30 (S103). Here, the engine operation information includes, for example, the engine speed. In S104, since the ignition key is turned off, the ECU 24 is turned off.

When the MC is turned on (S111), it performs initialization processing (S112) and data restoration processing (S113). The MC stores the data processed immediately before it is turned off last time in the nonvolatile memory (not shown) as the end data. In the data restoration process, when turned on this time, the end-time data stored in the nonvolatile memory is read by the MC. Here, the end length data corresponds to the feed length.

Next, the MC starts measuring the control cycle (S114). After that, if the ignition key is not turned off (NO in S116), the MC repeats the process of calculating the payout length of the suspension rope 66 and the undulating rope 67 and outputting the same to the CAN bus 30 for each control cycle (S115). Specifically, the MC acquires the rotation amounts of the hoisting drum 61a and the undulating drum 62a from the rotation amount sensors 41 and 42, and determines the payout length of the hanging rope 66 and the undulating rope 67 from the acquired rotation amount using the above-described method. calculate.

On the other hand, when the ignition key is turned off (YES in S116), the MC executes a data saving process of saving the end data in the nonvolatile memory (S117), and is turned off (S118).

When the overload prevention device 19 is turned on (S121), it performs initialization processing (S122) and data restoration processing (S123). The data restoration process is the same as the process described in S113. Here, the load factor is adopted as the end data, and the load factor is read.

Next, the overload prevention device 19 starts measuring the control cycle (S124). After that, if the ignition key is not turned off (NO in S126), the overload prevention device 19 calculates the load factors of the suspension rope 66 and the undulating rope 67, and repeats the process of outputting to the CAN bus 30 every control cycle ( S125). In detail, the overload prevention device 19 acquires the load data of the suspension rope 66 and the undulating rope 67 from the load sensors 43 and 44, acquires the boom angle from the angle sensor 45, and acquires the acquired load data and boom angle. From the above, the load factors of the suspension rope 66 and the undulating rope 67 are calculated using the method described above. In S125, the rated load, the actual load, and the boom angle when the load factor is calculated are also output. Hereinafter, the data group output in S125 will be referred to as "load factor or the like".

On the other hand, when the ignition key is turned off (YES in S126), the overload prevention device 19 executes a data saving process of saving the end-time data in the nonvolatile memory (S127), and turns off (S128).

When the data logger 28 returns from the power saving mode to the normal mode (S132), it performs a state history data restoration process (S133), and reads the end data from the memory 282. Here, the state history of the suspension rope 66 and the undulating rope 67 stored in the memory 282 immediately before being turned off last time is read as the end time data.

Next, the data logger 28 performs a bending/stretching history data restoration process (S134). Here, the data logger 28 reads out the bending and stretching history stored in the memory 282 when it was turned off last time from the memory 282 as end data.

Next, the data logger 28 starts measuring the control cycle (S135). Next, the data logger 28 repeats the process of receiving the data flowing through the CAN bus 30 every control cycle (S136). Here, in S115, the respective feeding lengths of the suspension rope 66 and the undulating rope 67 output from the MC are received in each control cycle. Further, here, in S125, the load factor and the like output from the overload prevention device 19 is received for each control cycle.

Next, the data logger 28 accumulates in the state history table T19 a state history in which the payout length, the rated load, and the load factor for each of the suspension rope 66 and the undulating rope 67 are associated with the boom angle (S137). ..

Next, the data logger 28 calculates the passage length of the suspension rope 66 and the undulation rope 67 in each sheave (S138).

Specifically, the data logger 28 performs the following processing if a hoisting or lowering operation is input. First, the data logger 28 calculates the distance hkf (see FIG. 9) from the current boom angle θb by performing the calculations of the above equations (1) to (4). Next, the data logger 28 obtains, from the position information table, the position of each sheave on the suspension rope 66 according to the feeding length of the suspension rope 66 and the distance hkf received in S136. Next, the data logger 28 obtains the amount of change in the passage length for each section from the difference between the position of the sheave on the suspension rope 66 obtained last time and the position of the sheave on the suspension rope 66 obtained this time. Next, the data logger 28 obtains the current passage length for each section by integrating the calculated change amount for each section.

In S138, the process of accumulating the amount of change for each section is repeated during the hoisting operation or the lowering operation, and thus the sheave passage length of each section of the suspension rope 66 is calculated. In S138, the passing length of the sheave for each section is calculated for the undulating rope 67 as well as the hanging rope 66.

Next, the data logger 28 counts up the number of times of bending and stretching each time the sheave passage length calculated for each section becomes 1/4 round (S139).

Next, the data logger 28 stores the calculated bending/bending number for each section in the bending/bending history table T20 as a bending/bending history in association with the load factor acquired in S136 and the calculation date/time (S140). Specifically, when the hoisting or lowering operation is started, a new record is created in the bending and stretching history table T20, and the "bending and stretching number" and "load factor" of the record are updated. Then, when the winding or winding operation is completed, the update to the record is completed, and one bending and stretching history is fixed.

Next, if the ignition key is not turned off (NO in S141), the data logger 28 returns the processing to S136 and repeats the processing of S136 to S141 every time the control cycle comes.

On the other hand, when the ignition key is turned off (YES in S141), the data logger 28 executes a data saving process of storing the end time data in the memory 282 (S142). Here, the bending and stretching history and the state history calculated immediately before the ignition key is turned off are stored in the memory 282 as final data.

FIG. 19 is a flowchart showing a process of generating daily report data and monthly report data by the data logger 28. This process is executed every time a timer interrupt occurs (S200). Here, the timer interrupt is executed every time a predetermined time (for example, 0 hour 0 minute 0 second) arrives. Therefore, the flowchart of FIG. 19 is executed once a day.

First, the data logger 28 is in the power saving mode when a timer interrupt occurs (S200) (S201), and when the timer interrupt occurs, the data logger 28 returns from the power saving mode to the normal mode (S202).

Next, the data logger 28 performs state history data restoration processing (S203). Here, last time, the state history stored in the memory 282 immediately before the end of the flowchart of FIG. 19 is read as the end time data. Next, the data logger 28 performs a data restoration process of the bending and stretching history (S204). Here, the bending and stretching history stored in the memory 282 immediately before the end of the flowchart of FIG. 19 is read as the end time data.

Next, the data logger 28 acquires current date information (S205). Here, the data logger 28 includes a real-time clock (RTC) that constantly measures the time, and the current date information may be acquired from the RTC. The date information is composed of “year”, “month”, and “day” such as “May 30, 2016”.

Next, the data logger 28 reads the one-day state history from the state history table T19 stored in the memory 282, associates the read one-day state history with the current date information acquired in S282, and outputs the daily report data. Is generated and transmitted to the server 10 (S207).

Next, in the data logger 28, the “month” indicated by the date information associated with the daily report data transmitted last time is changed from the “month” indicated by the date information associated with the daily report data transmitted this time. It is determined whether or not (YES in S208). In the case of YES in S208, the data logger 28 generates monthly report data of bending and stretching history (S209). On the other hand, in the case of NO in S208, the data logger 28 advances the processing to S208. As a result, monthly report data is generated once a month. In step S209, the bending and stretching history for the last month is collected and monthly report data for one month is generated.

Next, the data logger 28 transmits the monthly report data generated in S209 to the server 10 (S210). Next, the data logger 28 deletes the bending and stretching history for the last month from the bending and stretching history table T20 stored in the memory 282 (S211).

Next, the data logger 28 stores the latest state history in the memory 282 as end-time data (S212). Next, the data logger 28 returns to the power saving mode (S213).

As described above, according to the flowchart of FIG. 19, since the bending and stretching history is collectively transmitted to the server 10 on a monthly basis, the information processing device 4 needs to access the server 10 every time the bending and stretching history is generated. Disappears. Therefore, the communication load between the server 10 and the information processing device 4 can be reduced.

When the statistical information generation unit 101 of the server 10 acquires the monthly report data, it extracts the bending and stretching histories included in the monthly report data one by one, and the statistics of bending and stretching for each section indicated by the extracted bending and stretching history are shown in FIG. Statistical information is generated by voting for the corresponding cell in the information table T11. Then, the server 10 may store the generated statistical information in a memory (not shown).

When the server 10 receives the statistical information acquisition request from the terminal 14, the server 10 may generate a distribution map (FIG. 13) of the number of times of bending and stretching from the statistical information and transmit it to the terminal 14. Alternatively, when the server 10 receives the statistical information acquisition request from the terminal 14, the server 10 may transmit the statistical information to the terminal 14 and cause the terminal 14 to generate a distribution map of the number of times of bending and stretching from the statistical information. Then, the terminal 14 may display a distribution chart of the number of times of bending and stretching on the presentation unit 141. Further, the terminal 14 may display the statistical information table T11 shown in FIG. 12 on the presentation unit 141.

In this embodiment, as shown in FIG. 2, the server 10 acquires a plurality of pieces of statistical information from a plurality of cranes 2. Therefore, the statistical information generation unit 101 may store the statistical information of each crane 2 in a memory (not shown) in association with the identification information of each crane 2, for example. Then, when the server 10 receives the statistical information acquisition request specifying the identification information of the crane 2 from the terminal 14, the server 10 may transmit the relevant statistical information to the terminal 14.

In this way, according to the present embodiment, the number of times of bending and stretching for each section of the wire rope with respect to the sheave, that is, the number of times of bending and stretching according to the load factor is counted. Then, based on the count result, statistical information indicating the number of times of bending and stretching for each section according to the load factor is generated, and the generated statistical information is presented.

Therefore, the user can grasp the bias of the fatigue of the wire rope based on the statistical information, and determine the appropriate time to replace the wire rope. As a result, in the present embodiment, it is possible to avoid the situation in which the wire rope is forced to be replaced, even though the wire rope has not deteriorated, and it is possible to reduce the economic burden and efficiently use resources. .. In addition, in the present embodiment, it is possible to prevent the continued use of the deteriorated wire rope and ensure safety.

In addition, since this statistical information is information generated from actual crane data, not experimental data obtained by a test machine, highly reliable statistical information can be provided.

(Modification 1)
In the first embodiment, the statistical information generation unit 101 is provided in the server 10, but the present embodiment is not limited to this, and the statistical information generation unit 101 may be provided in the information processing device 4. ..

20: is a block diagram which shows an example of a structure of the information presentation system 1 concerning the modification 1. As shown in FIG. As shown in FIG. 20, the statistical information generation unit 101 is provided in the information processing device 4.

In this case, the statistical information generation unit 101 generates statistical information by voting the bending and stretching history in the statistical information table T11 every time one bending and stretching history is created by the counting unit 281. Good. Alternatively, for example, every time the counting unit 281 creates a bending/stretching history for a certain period (for example, one day, one week, one month), the statistical information generating unit 101 stores the bending/stretching history in the statistical information table T11. Statistical information may be generated by voting.

In this case, the terminal 14 may be connected to the information processing device 4 via a communication line such as a USB (Universal Serial Bus). Then, the terminal 14 may read the statistical information generated by the statistical information generation unit 101 and store the statistical information in a non-volatile memory (not shown) included therein. Here, a USB memory or a hard disk may be used as the non-volatile memory.

As the terminal 14, for example, a personal computer is used. Then, the terminal 14 may analyze the statistical information read from the statistical information generation unit 101 with predetermined application software, generate a distribution map of the number of bending and stretching, and display the distribution unit 141 on the presentation unit 141.

In the first modification, the statistical information generation unit 101 may display the generated distribution map of the bending and stretching times on the operation panel provided in the crane 2.

In this case, the statistical information generation unit 101 generates statistical information from the bending and stretching history currently stored in the memory 282, generates a distribution map of the number of bending and stretching from the generated statistical information, and displays it on the operation panel of the crane 2. It may be displayed. In this case, the passenger of the crane 2 can confirm the statistical information in real time.

(Modification 2)
The counting unit 281 and the statistical information generating unit 101 may be provided in the server 10. In this case, the information processing device 4 stores the feeding length of the suspension rope 66 and the undulating rope 67 and the load factor calculated by the overload prevention device 19 in the memory 282. Then, when a certain period (for example, one day, one week, one month) has passed, the information processing device 4 transmits the feeding length and the load factor to the server 10 and causes the counting unit 281 to generate a bending and stretching history. Good. In this case, since the information processing device 4 does not need to generate the bending and stretching history, the processing load is reduced.

(Modification 3)
In the above embodiment, the three-dimensional distribution of bending and stretching times as shown in FIG. 13 is adopted, but the present invention is not limited to this, and a two-dimensional distribution of bending and stretching times is adopted. Good. FIG. 23 is a diagram showing an example of a distribution diagram of the number of times of bending and stretching in two dimensions. FIG. 23 shows the distribution of the number of times of bending and stretching when an overload condition occurs.

In the example of FIG. 23, the number of times of bending and stretching for each section is shown, which is color-coded for each number of times when an overload condition occurs. The height of the bar in the 140m section shows that the number of bending and stretching is 13 times. The breakdown of the bar is that the number of bending and stretching in the second overloaded state is 3 times and in the third overloaded state. The number of times of bending and stretching is 6, and the number of times of bending and stretching in the fourth overloaded state is 2, and the number of times of bending and stretching is 5 times.

Therefore, from the two-dimensional distribution of bending and stretching times shown in FIG. 23, when an overload state occurs, it is possible to recognize in which section the bending and stretching often occur for each occurrence of the overload state.

(Modification 4)
In the above embodiment, the information processing device 4 was connected to the server 10 via the mobile phone network 6 as shown in FIG. 2, but the present invention is not limited to this. For example, the information processing device 4 may be connected via a LAN (Local Area Network) or an internet communication network.

(Modification 5)
The statistical information generation unit 101 may determine the degree of deterioration of the wire rope from the generated statistical information. In this case, the statistical information generation unit 101 sets a weight value for each cell of the statistical information table T11 shown in FIG. Then, the statistical information generation unit 101 may statistically process a value obtained by multiplying the weight value of each cell by the number of bending and stretching of each cell, and calculate the obtained value as an evaluation value indicating the degree of deterioration of the wire rope. .. As the evaluation value, an addition average value of values obtained by multiplying the weight value of each cell by the number of bending and stretching times of each cell can be adopted. In addition, the statistical information generation unit 101 determines the ease of pain for each section from the past maintenance information, and sets the weight value such that the value is high in the section that is easy to pain and low in the section that is hard to pain. Good.

Then, the statistical information generation unit 101 may present the evaluation value to the user by displaying the calculated evaluation value on the presentation unit 141 of the terminal 14 or by displaying it on the operation panel of the crane 2. As a result, it is possible to present the user with judgment information indicating how tired the wire rope is.

In addition, the statistical information generation unit 101 may calculate the degree of deterioration of the wire rope by calculating a statistical feature amount in the statistical information table T11 illustrated in FIG. In this case, it can be determined that the wire ropes having the same or similar characteristic amounts have the same fatigue. As the characteristic amount, for example, dispersion can be adopted.

(Modification 6)
The crane 2 may include a display monitor or the like as a notification unit that displays a message prompting the operator to inspect the suspension rope 66 and the undulating rope 67. In this case, for example, when the evaluation value calculated in the modified example 5 exceeds the reference value, the statistical information generation unit 101 causes a message prompting an inspection to be displayed on the presentation unit 141 of the terminal 14 or the operation panel of the crane 2. Good.

(Modification 7)
Further, as the load index value according to the present invention, the actual load applied to the suspension rope 66 and the undulating rope 67 may be adopted instead of the load factor.

(Modification 8)
In the above-mentioned embodiment, the reference value when counting the number of bending and stretching is set to ¼ circumference of the sheave, but the present invention is not limited to this. For example, the reference value may be changed according to the radius of the sheave and the type of the sheave. For example, in the idler sheave 51b, the length of the arc contacting the suspension rope 66 may be shorter than 1/2 turn. In this case, the reference value may be set to a value equal to or less than 1/4 round of the idler sheave 51b (for example, 1/8 round). Further, the smaller the radius of the sheave, the more the load applied to the wire rope during bending and stretching. Therefore, the count value for one time may be increased as the radius of the sheave becomes smaller.

T11 Statistical information table T19 State history table T20 Bending and stretching history table 1 Information presentation system 2 Crane 4 Information processing device 6 Mobile phone network 10 Server 12 Internet communication network 14 Terminal 18 Sensor section 19 Overload prevention device 21 First controller 22 Second Controller 28 Data logger 30 CAN bus 41,42 Rotation amount sensor 43,44 Load sensor 45 Angle sensor 51 Boom 51a Top sheave 51b Idler sheave 51c Hook sheave 61 Hoisting winch 61a Hoisting drum 62 Hoisting winch 62a Hoisting drum 64 Hooking device 66 Hanging Rope 67 Undulating rope 100 Suspended load 101 Statistical information generation unit 141 Presentation unit 191 Load calculation unit 211,221 Delivery length calculation unit 281 Count unit 282 Memory 601 Sheave 602 Wire rope

Claims (5)

A crane having a winch for winding a wire rope for suspending an object through at least one sheave, wherein the information presenting system presents information about the wire rope.
A load calculation unit that calculates a load index value that is an index value of the load on the wire rope,
When the wire rope is divided into a plurality of sections, the number of times of bending and stretching, which is the number of times the length of the wire rope with respect to the sheave in each section exceeds a reference value, is counted according to the calculated load index value. Counting part,
A statistical information generation unit that generates statistical information indicating the number of times of bending and stretching for each section according to the load index value, based on the counting result by the counting unit,
E Bei a presentation unit for presenting the generated the statistical information,
The counting unit, when the winding direction of the wire rope is switched in the middle of passing a certain section through the sheave and the total passing length for the sheave of the section exceeds the reference value, does not count for the section.
Information presentation system. The statistical information generation unit identifies which load category the calculated load index value belongs to among a plurality of predetermined load categories, and the section for each of the sections according to the identified load category. The information presentation system according to claim 1, wherein information indicating the number of times of bending and stretching is generated as the statistical information. The wire rope is attached to the undulating member of the crane,
The wire rope is hung around multiple sheaves,
The information presentation system,
And the attitude detection unit for detecting the attitude of the work equipment,
Further comprising a payout length calculation unit for calculating a payout length index value that is an index value of the length of the wire rope paid out from the winch,
The counting unit calculates the position of each sheave on the wire rope based on the calculated feeding length index value, the detected posture, and the number of sheaves of the sheave, and for each section for each sheave. The information presentation system according to claim 1, wherein the passage length of the information is calculated. The information presentation system includes an information processing device and a server connected to the information processing device via a network,
The information processing device includes the load calculation unit and the counting unit,
The server includes the statistical information generation unit,
4. The information presentation system according to claim 1, wherein the information processing device accumulates the counting result by the counting unit and transmits the accumulated counting result to the server every time a certain period of time elapses. The information presentation system according to any one of claims 1 to 4, wherein the reference value has a value of at least 1/4 of a circumference of the sheave.

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