Slinging work support system, slinging work support method and slinging work support program

Abstract

To provide a technique capable of preventing artificial mistakes in a slinging work.SOLUTION: A slinging work support system includes: a first communication machine provided on a first wire rope; a second communication machine provided on a second wire rope; and a slinging angle calculation unit for calculating a slinging angle by the first wire rope and the second wire rope to a lifted cargo, on the basis of communication of the first communication machine and the second communication machine. The system also includes a load detection unit for detecting a load to the lifted cargo slung by the first wire rope and the second wire rope.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a rigging work support system, a rigging work support method, and a rigging work support program. [Background technology]

[0002] Conventionally, slinging work for lifting loads using a crane or the like has mainly depended on the worker's sense and level of experience. Patent Document 1 discloses technology related to a slinging work simulation system that enables workers with little work experience to acquire the correct sense for safely performing slinging work. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-127844 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the technology of Patent Document 1, workers with little work experience can acquire the correct feeling for safely performing rigging work by having them experience a realistic simulation of rigging work.

[0005] However, rigging work is still dependent on the worker's sense and experience, so there is a possibility of accidents occurring due to human error.

[0006] The present disclosure aims to provide a technique capable of preventing human error in rigging work. [Means for solving the problem]

[0007] In order to solve the above problems, the rigging operation support system according to the present disclosure comprises a first communication device provided in a first rigging device, a second communication device provided in a second rigging device, and a rigging angle calculation unit that calculates the rigging angle of the first rigging device and the second rigging device relative to a suspended load based on communication between the first communication device and the second communication device.

[0008] In order to solve the above-mentioned problems, the rigging operation support method according to the present disclosure includes a first communication device provided in a first rigging device and a second communication device provided in a second rigging device, and a rigging angle calculation step is executed by a computer to calculate the rigging angle of the first rigging device and the second rigging device relative to a suspended load based on communication between the first communication device and the second communication device.

[0009] In addition, in order to solve the above problem, the rigging work support program according to the present disclosure includes a first communication device provided in a first rigging device and a second communication device provided in a second rigging device, and causes a computer to execute a rigging angle calculation procedure that calculates the rigging angle of the first rigging device and the second rigging device relative to a suspended load based on communication between the first communication device and the second communication device. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide a technology that can prevent human errors in rigging work. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating an example of a configuration of a slinging operation support system according to an embodiment of the present invention. [Figure 2] FIG. 10 is a diagram showing an image of a sling attached to a suspended load. [Figure 3] FIG. 10 is a diagram illustrating an example of a sling angle calculation method. [Figure 4] FIG. 10 is a diagram showing an example of a wire rope type database. [Figure 5] FIG. 10 is a diagram showing an example of a wire rope management database. [Figure 6A] FIG. 10 is a diagram showing an example of a sequence relating to a rigging operation. [Figure 6B] FIG. 10 is a diagram showing an example of a processing sequence related to slinging work. [Figure 7] FIG. 10 is a diagram showing an example of a screen displayed on the operator device when performing two-line lifting. [Figure 8] FIG. 10 is a diagram showing an example of a screen displayed on the operator device when four-line lifting is performed. [Figure 9] 10A and 10B are diagrams showing examples of multi-stage hanging and lantern hanging. [Figure 10] FIG. 10 is a diagram showing an example of a screen displayed on the operator device when performing multi-stage lifting. [Figure 11] FIG. 10 is a diagram showing an example of a screen displayed on the worker's device when hanging a lantern. [Figure 12] FIG. 10 is a diagram showing another example of a sling angle calculation method. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. However, more detailed explanations than necessary, such as detailed explanations of well-known technical matters and redundant explanations of substantially identical configurations, may be omitted.

[0013] The drawings described below and referenced below are provided to enable those skilled in the art to understand the present disclosure, and are not intended to limit the scope of the claims of the present disclosure.

[0014] <System configuration> In an embodiment of the present disclosure, FIG. 1 is a diagram illustrating an example of the configuration of a slinging work support system. The slinging work support system 1 includes a worker device 10, a server 20, a slinging angle calculation device 30, a load detection device 40, and communication devices 50 (first communication device 51, second communication device 52, third communication device 53, fourth communication device 54, fifth communication device 55, sixth communication device 56, etc.). The communication devices 50 are provided (integrated or separately) on wire ropes 60 (first wire rope 61, second wire rope 62, third wire rope 63, fourth wire rope 64, fifth wire rope 65, sixth wire rope 66, etc.) as an example of slinging equipment. Note that the slinging equipment on which the communication devices 50 are provided is not limited to the wire ropes 60, and may also be, for example, fiber slings or shackles. Furthermore, it is preferable to provide the communication devices 50 as close to the lower end or lower end (near the load) of the slinging equipment as possible. This improves the accuracy of the sling angle of the slinging tool.

[0015] The worker device 10 and the server 20 are communicably connected via a communication network N. The communication network N is configured, for example, from the Internet, a mobile communication network, a LAN (Local Area Network), etc., or a combination of these.

[0016] The worker device 10 transmits and receives various data and signals to and from the sling angle calculation device 30 and the load detection device 40 via short-range communication such as infrared communication or Bluetooth (registered trademark, the rest of this document is omitted).

[0017] The sling angle calculation device 30 performs distance measurement and positioning by UWB (Ultra Wide Band) communication with the communication device 50.

[0018] The worker device 10 is configured with a mobile terminal, personal computer, etc. carried by a worker at a construction site or the like. Examples of mobile terminals include smartphones, tablet terminals, laptop computers, etc. Note that mobile terminals and the like are well-known technologies, so detailed explanations will be omitted.

[0019] The server 20 is configured by an information processing device such as a server computer, a personal computer, etc. The information processing device includes a CPU, storage, ROM, RAM, input / output I / F, a communication unit, a display unit, etc. Note that information processing devices are well-known technologies, so detailed explanations will be omitted.

[0020] The sling angle calculation device 30, the load detection device 40, and the communication device 50 are configured by a microcomputer including a processor and memory (e.g., RAM, ROM, storage, etc.). Note that since microcomputers are well-known technology, detailed explanations thereof will be omitted.

[0021] The worker device 10 includes a slinging work support unit 11, a short-range communication unit 12, a communication unit 13, an imaging unit (not shown), etc. A storage or the like of the worker device 10 stores a slinging work support application (slinging work support app), which is software for supporting slinging work, a web browser application (browser app), a QR code (registered trademark, omitted hereinafter), a scanning app, etc. The function of the slinging work support unit 11 is realized by a processor such as a CPU reading and executing the slinging work support app stored in the storage or the like. The short-range communication unit 12 is a short-range wireless communication interface such as infrared communication, Bluetooth, or an RFID (Radio Frequency Identifier) ​​reader (e.g., NFC (Near Field Communication)). The communication unit 13 is an interface for communicating with the server 20 via the communication network N.

[0022] The server 20 includes a wire rope management unit 21 that performs processing related to the management of the wire rope 60. The function of the wire rope management unit 21 is realized by reading and executing a wire rope management program stored in storage or the like by a processor such as a CPU. The storage or the like also stores a wire rope type database (wire rope type DB) 22, a wire rope management database (wire rope management DB) 23, a work log 24, a worker management DB (not shown), and the like, which are used by the wire rope management unit 21. The work log 24 is a work log related to slinging work, and the worker management DB stores worker identification information (worker ID), passwords, and the like. The wire rope type DB 22 and wire rope management DB 23 will be described later.

[0023] The sling angle calculation device 30 includes a sling angle calculation unit 31, a UWB communication unit 32, and a short-range communication unit 33. A sling angle calculation program is stored in the memory. The processor realizes the function of the sling angle calculation unit 31 by reading and executing the load detection program stored in the memory. The UWB communication unit 32 communicates with UWB communication units 512 to 562 (hereinafter collectively referred to as UWB communication unit 510) described below via UWB. The UWB communication unit 32 includes a first receiving unit (first antenna) 321 serving as a first communication unit and a second receiving unit (second antenna) 322 serving as a second communication unit. The second receiving unit 322 is disposed in the vertical direction at a predetermined distance (distance X: known distance) from the first receiving unit 321. The second receiving unit 322 may also be disposed in the horizontal direction (with no tilt, a right tilt, or a left tilt) relative to the first receiving unit 321. Furthermore, the first receiving unit 321 and the second receiving unit 322 may be configured as a communication unit capable of two-way communication. The sling angle calculation unit 31 calculates the distance and angle at which the UWB communication unit 510 is located relative to the UWB communication unit 32, based on UWB wireless communication between the UWB communication unit 32 and the UWB communication unit 510. The short-range communication unit 33 is a short-range wireless communication interface such as infrared communication or Bluetooth.

[0024] The first communication device 51 includes an ID tag 511 and a UWB communication unit 512. The ID tag 511 is an RFID tag, an NFC tag, or the like that stores information (such as a wired ID) that can be read by an RFID reader, which is one of the short-range communication units 12 mounted on the worker device 10. The UWB communication unit 512 is a communication unit that performs UWB wireless communication and communicates with the UWB communication unit 32. A wired ID and a QR code that encodes the wired ID are displayed on the surface of the housing of the first communication device 51 (see FIG. 2). A microcomputer keeps track of the remaining battery power of the first communication device 51. Note that the configurations of the second communication device 52 to the sixth communication device 56 are the same as those of the first communication device 51, and therefore a description thereof will be omitted.

[0025] A load detection calculation program is stored in the memory of the load detection device 40. The processor reads and executes the load detection program stored in the memory to realize the function of a load detection unit 41. The load detection unit 41 detects a load based on a detection signal output from a load sensor (not shown). The short-range communication unit 33 is a short-range wireless communication interface such as infrared communication or Bluetooth.

[0026] <Image of a sling> FIG. 2 is a diagram showing an image of a load being slinged. As shown in this figure, a load detection device 40 is provided on the crane wire 70 of a crane (not shown). A slinging angle calculation device 30 is attached to the hook 80 along with a first wire rope 61 and a second wire rope 62 for slinging a load 800. The slinging angle calculation device 30 is attached so as to minimize the effect of the swinging of the crane wire 70, etc. A first communication device 51 is provided on the first wire rope 61 in the vicinity of the load 800 (for example, near the eye of the first wire rope 61), and a second communication device 52 is provided on the second wire rope 62 in the vicinity of the load 800 (for example, near the eye of the second wire rope 62). The sling angle calculation device 30 may be attached to the crane wire 70 in the vicinity of the hook 80 (between an over-winding prevention device (not shown) and the hook 80). Alternatively, the sling angle calculation device 30 may be provided on the hook 80.

[0027] <How to calculate the sling angle> 3 is a diagram showing an example of a method for calculating a sling angle by the sling angle calculation unit 31. In this embodiment, for example, the AoA (Angle of Arrival) method is adopted to calculate the sling angle. Note that since the AoA method is a well-known technique, detailed description thereof will be omitted.

[0028] 3(a) shows an example in which two loads 800 are slinged using a first wire rope 61 and a second wire rope 62. As shown in FIG. 3(a), the sling angle calculation unit 31 acquires the relative distance (distance Y1) between the first receiving unit 321 and the UWB communication unit 512, and the relative distance (distance Z1) between the second receiving unit 322 and the UWB communication unit 512. As described above, the relative distance between the first receiving unit 321 and the second receiving unit 322 is distance X (a known distance). Based on distance X, distance Y1, and distance Z1, slinging angle calculation unit 31 calculates angle θ11 formed by the direction of distance X (virtual line X) between first receiving unit 321 and second receiving unit 322 and the direction of distance Z1 (virtual line Z1) between second receiving unit 322 and UWB communication unit 512, and calculates angle θ12 formed by the direction of distance Y1 (virtual line Y1) between first receiving unit 321 and UWB communication unit 512 and the direction of distance Z1 (virtual line Z1) between second receiving unit 322 and UWB communication unit 512. Then, based on angles θ11 and θ12, slinging angle calculation unit 31 calculates angle θ1 formed by virtual line X and virtual line Y1.

[0029] Furthermore, the slinging angle calculation unit 31 acquires the relative distance (distance Y2) between the first receiving unit 321 and the UWB communication unit 522 and the relative distance (distance Z2) between the second receiving unit 322 and the UWB communication unit 522. Based on the distance X, the distance Y2, and the distance Z2, the slinging angle calculation unit 31 calculates an angle θ21 formed by the direction of the distance X (virtual line X) between the first receiving unit 321 and the second receiving unit 322 and the direction of the distance Z2 (virtual line Z2) between the second receiving unit 322 and the UWB communication unit 522, and calculates an angle θ22 formed by the direction of the distance Y2 (virtual line Y2) between the first receiving unit 321 and the UWB communication unit 522 and the direction of the distance Z2 (virtual line Z2) between the second receiving unit 322 and the UWB communication unit 522. Then, the sling angle calculation unit 31 calculates the angle θ2 formed by the imaginary line X and the imaginary line Y2 based on the angles θ21 and θ22.

[0030] The slinging angle calculation unit 31 compares the angle θ1 with the angle θ2 and sets the larger angle as θa. Next, the slinging angle calculation unit 31 calculates the slinging angle θA (the angle formed by the direction of the distance Y1 (imaginary line X1) and the direction of the distance Y2 (imaginary line Y2)) by doubling θa. Note that the slinging angle calculation unit 31 may also calculate the slinging angle θA by adding up the angle θ1 and the angle θ2.

[0031] Fig. 3(b) shows an example in which a load 900 is suspended by four slings, namely, a first wire rope 61, a second wire rope 62, a third wire rope 63, and a fourth wire rope 64. As shown in Fig. 3(b), first, the sling angle calculation unit 31 calculates the sling angle θB formed by the first wire rope 61 and the second wire rope 62. Next, the sling angle calculation unit 31 calculates the sling angle θC formed by the third wire rope 63 and the fourth wire rope 64.

[0032] The slinging angle calculation unit 31 acquires the relative distance (distance Y3) between the first receiving unit 321 and the UWB communication unit 512 and the relative distance (distance Z3) between the second receiving unit 322 and the UWB communication unit 512. Based on the distance X, the distance Y3, and the distance Z3, the slinging angle calculation unit 31 calculates an angle θ31 formed by the direction of the distance X between the first receiving unit 321 and the second receiving unit 322 (virtual line X) and the direction of the distance Z3 between the second receiving unit 322 and the UWB communication unit 512 (virtual line Z3), and calculates an angle θ32 formed by the direction of the distance Y3 between the first receiving unit 321 and the UWB communication unit 512 (virtual line Y3) and the direction of the distance Z3 between the second receiving unit 322 and the UWB communication unit 512 (virtual line Z3). Then, the sling angle calculation unit 31 calculates the angle θ3 formed by the imaginary line X and the imaginary line Y3 based on the angles θ31 and θ32.

[0033] Furthermore, the slinging angle calculation unit 31 acquires the relative distance (distance Y4) between the first receiving unit 321 and the UWB communication unit 522 and the relative distance (distance Z4) between the second receiving unit 322 and the UWB communication unit 522. Based on the distance X, the distance Y4, and the distance Z4, the slinging angle calculation unit 31 calculates an angle θ41 formed by the direction of the distance X between the first receiving unit 321 and the second receiving unit 322 (virtual line X) and the direction of the distance Z4 between the second receiving unit 322 and the UWB communication unit 522 (virtual line Z4), and calculates an angle θ42 formed by the direction of the distance Y4 between the first receiving unit 321 and the UWB communication unit 522 (virtual line Y4) and the direction of the distance Z4 between the second receiving unit 322 and the UWB communication unit 522 (virtual line Z4). Then, the sling angle calculation unit 31 calculates the angle θ4 formed by the imaginary line X and the imaginary line Y4 based on the angles θ41 and θ42.

[0034] The slinging angle calculation unit 31 compares the angle θ3 with the angle θ4 and sets the larger angle as θb. Next, the slinging angle calculation unit 31 calculates the slinging angle θB (the angle formed by the direction of the distance Y3 (imaginary line X3) and the direction of the distance Y4 (imaginary line Y4)) by doubling θb. Note that the slinging angle calculation unit 31 may also calculate the slinging angle θB by adding the angle θ3 and the angle θ4 together.

[0035] Next, the slinging angle calculation unit 31 acquires the relative distance (distance Y5) between the first receiving unit 321 and the UWB communication unit 532 and the relative distance (distance Z5) between the second receiving unit 322 and the UWB communication unit 532. Based on the distance X, the distance Y5, and the distance Z5, the slinging angle calculation unit 31 calculates an angle θ51 formed by the direction of the distance X between the first receiving unit 321 and the second receiving unit 322 (virtual line X) and the direction of the distance Z5 between the second receiving unit 322 and the UWB communication unit 532 (virtual line Z5), and calculates an angle θ52 formed by the direction of the distance Y5 between the first receiving unit 321 and the UWB communication unit 532 (virtual line Y5) and the direction of the distance Z5 between the second receiving unit 322 and the UWB communication unit 532 (virtual line Z5). Then, the sling angle calculation unit 31 calculates the angle θ5 formed by the imaginary line X and the imaginary line Y5 based on the angles θ51 and θ52.

[0036] Furthermore, the slinging angle calculation unit 31 acquires the relative distance (distance Y6) between the first receiving unit 321 and the UWB communication unit 542 and the relative distance (distance Z6) between the second receiving unit 322 and the UWB communication unit 542. Based on the distance X, the distance Y6, and the distance Z6, the slinging angle calculation unit 31 calculates an angle θ61 formed by the direction of the distance X (virtual line X) between the first receiving unit 321 and the second receiving unit 322 and the direction of the distance Z6 (virtual line Z6) between the second receiving unit 322 and the UWB communication unit 542, and calculates an angle θ62 formed by the direction of the distance Y6 (virtual line Y6) between the first receiving unit 321 and the UWB communication unit 542 and the direction of the distance Z6 (virtual line Z6) between the second receiving unit 322 and the UWB communication unit 542. Then, the sling angle calculation unit 31 calculates the angle θ6 formed by the imaginary line X and the imaginary line Y6 based on the angles θ61 and θ62.

[0037] The slinging angle calculation unit 31 compares the angle θ5 with the angle θ6 and sets the larger angle as θc. Next, the slinging angle calculation unit 31 calculates the slinging angle θC (the angle formed by the direction of the distance Y5 (imaginary line X5) and the direction of the distance Y6 (imaginary line Y6)) by doubling θc. Note that the slinging angle calculation unit 31 may also calculate the slinging angle θC by adding up the angle θ5 and the angle θ6.

[0038] Using the above-described sling angle calculation method, the sling angle calculation unit 31 calculates the sling angle when two slings are used and the sling angle when four slings are used. In this embodiment, the AoA method using UWB is used to calculate the sling angle. However, this is not limiting, and for example, the AoA method using Bluetooth 5.1 may also be used. The AoD (Angle of Departure) method may also be used.

[0039] <Wire rope type database> 4 is a diagram showing an example of an image of the wire rope type database (wire rope type DB) 22. The wire rope type DB 22 stores information about the types (kinds) of wire ropes 60 that can be used for slinging.

[0040] The wire rope type DB 22 includes a wire type column in which wire type information identifying the type of wire rope 60 is registered, a rope diameter column in which the rope diameter (mm) of the wire rope 60 is registered, and a length column in which the length (m) of the wire rope 60 is registered. There are 15 types of lengths (m) of the wire rope 60, for example, 1 (A), 1.5 (B), 2 (C), 2.5 (D), 3 (E), 5 (F), 8 (G), 10 (H), 12 (I), 15 (J), 18 (K), 20 (L), 22 (M), 25 (N), and 30 (O). The wire type information is composed of information indicating the rope diameter and information indicating the length. For example, wire type AA has a rope diameter of 9 mm and a length of 1 m, and wire type BO has a rope diameter of 12 mm and a length of 30 m.

[0041] Additionally, wire rope type DB22 includes two-strand and four-strand suspension types. Two-strand suspension types include vertical types, for which the safe load (t) when suspended vertically by two ropes is registered, and 10°-60° types, for which the safe load (t) when suspended by two ropes at a sling angle of 10°-60° is registered. The safe load (t) conforms to JIS Standard 6x24 Type A.

[0042] The wire rope type DB 22 also includes a deterioration coefficient column consisting of a number of uses (times) column in which the number of times the wire rope 60 has been used is registered and a number of months of use (months) column in which the number of months of use of the wire rope 60 has been registered. The number of uses (times) column consists of a 0-200 column in which deterioration coefficients are registered when the number of uses is 0 to 200, a 201-400 column in which deterioration coefficients are registered when the number of uses is 201 to 400, and a 401-600 column in which deterioration coefficients are registered when the number of uses is 401 to 600. The number of months of use (months) column consists of a 0-12 column in which deterioration coefficients are registered when the number of months of use is 0 to 12 months, a 13-24 column in which deterioration coefficients are registered when the number of months of use is 13 to 24 months, and a 25-36 column in which deterioration coefficients are registered when the number of months of use is 25 to 36 months. The deterioration coefficients are coefficients corresponding to the number of uses and the number of months of use of the wire rope 60. For example, if the wire type is AA to AO, the deterioration coefficient based on the number of uses will be 1.00 if the number of uses is 0 to 200, and 0.98 if the number of uses is 0 to 400. Also, for example, if the wire type is AA to AO, the deterioration coefficient will be 1.00 if the number of months of use is 0 to 12 months, and 0.99 if the number of uses is 13 to 24. These deterioration coefficients are used in the load judgment described below.

[0043] <Wire rope management database> 5 is a diagram showing an example of an image of the wire rope management database (wire rope management DB) 23. The wire rope management DB 23 stores information relating to management of wire ropes 60 that can be used for slinging.

[0044] The wire rope management DB 23 includes a wire ID column in which wire rope identification information (wire ID) for identifying the wire rope 60 and the communication device 50 attached to the wire rope 60 is registered, a registration date column in which the registration date (usable start date) of the wire rope 60 is registered, a usage month column in which the number of months (months) the wire rope 60 has been used is registered, a usage count column in which the number of times the wire rope 60 has been used (times), and a battery remaining capacity (%) in which the remaining battery capacity (%) of the communication device 50 is registered. The wire ID is composed of wire type information and a serial number for that wire type. For example, a wire ID of AA-0001 indicates that the wire rope 60 is number 1 for a wire rope with a rope diameter of 9 mm and a length of 1 meter, and a wire ID of BO-0015 indicates that the wire rope 60 is number 15 for a wire rope with a rope diameter of 12 mm and a length of 30 m.

[0045] <Processing sequence for rigging work> 6A and 6B are diagrams showing an example of a processing sequence for slinging work. The processing sequence for slinging work is mainly executed by the slinging work support unit 11 of the worker device 10, the wire rope management unit 21 of the server 20, the sling angle calculation unit 31 of the sling angle calculation device 30, and the load detection unit 41 of the load detection device 40.

[0046] When starting slinging work, the worker launches the slinging work support app on the worker device 10. The slinging work support unit 11 functions by launching the slinging work support app. When the slinging work support app is launched, a slinging work support page (screen) is displayed on the worker device 10. The worker enters a predetermined worker ID, password, etc. on the login screen of the slinging work support page and transmits a login request to the server 20 (step S1).

[0047] When the login request is received, the server 20 performs login authentication and transmits the authentication result (step S2). If the authentication is successful at the server 20, the worker selects a pairing setting page to set up pairing with the sling angle calculation device 30 and the load detection device 40.

[0048] The worker starts up the sling angle calculation device 30 (turns on the power). When the sling angle calculation device 30 is started up, the sling angle calculation unit 31 starts to function. When the start-up is complete, the sling angle calculation unit 31 is recognized by the worker device 10, and the device name and device number of the sling angle calculation device 30 are displayed on the pairing setting page. The worker confirms the device name and device number and performs the pairing operation. In response to the pairing operation, a first pairing request is sent to the sling angle calculation device 30 (step S3).

[0049] When the first pairing request is received, the slinging angle calculation device 30 replies with a first pairing response (step S4). When the worker device 10 receives the first pairing response, pairing between the worker device 10 and the slinging angle calculation device 30 is completed.

[0050] The worker starts up the load detection device 40 (turns on the power). When the load detection device 40 is started up, the load detection unit 41 starts to function. When the start-up is complete, the load detection device 40 is recognized by the worker device 10, and the device name and device number of the load detection device 40 are displayed on the pairing setting page. The worker checks the device name and device number and performs the pairing operation. In response to the pairing operation, a second pairing request is sent to the load detection device 40 (step S5).

[0051] The load detection device 40 that has received the second pairing request returns a second pairing response (step S6). When the worker device 10 receives the second pairing response, pairing between the worker device 10 and the load detection device 40 is completed.

[0052] (Example of two-rod hanging) Next, the worker selects a slinging method setting page. FIG. 7(a) is a diagram showing an example of the slinging method setting page. The worker selects a desired slinging method from a list of slinging methods displayed on the slinging method setting page (Step S7). Note that the following description will be given taking as an example a case where two-rope lifting is selected as the slinging method for the load 800. Furthermore, the wire ropes 60 used for two-rope lifting are a first wire rope 61 and a second wire rope 62.

[0053] When double slinging is selected as the slinging method, a wire rope setting page is displayed. When the wire rope setting page is displayed, the worker uses the RFID reader of the worker device 10 to read the ID tag 511 of the first communication device 51 of the first wire rope 61 to be used for this slinging and the ID tag 521 of the second communication device 52 of the second wire rope 62 (step S8). FIG. 7(b) is a diagram showing an example of a screen displayed when the ID tag 511 and the ID tag 521 are read by the RFID reader. When the ID tag 511 and the ID tag 521 are read by the RFID reader, the wire IDs and remaining battery levels of the ID tags 511 and 521 are displayed. Note that, for example, if there is a communication device 50 with a remaining battery level of 10% or less, this screen prompts the user to replace the battery (or charge) or the wire rope 60.

[0054] When the ID tags 511 and 521 are read by the RFID reader of the worker device 10, a wire matching request is transmitted (step S9). This wire matching request includes information indicating that it is a two-rope suspension, the wire ID (wire ID stored in the ID tag 511) and remaining battery level of the first wire rope 61 read by the RFID reader, the wire ID (wire ID stored in the ID tag 521) and remaining battery level of the second wire rope 62, etc.

[0055] Upon receiving the wire verification request, the wire rope management unit 21 refers to the wire rope management DB 23 and verifies the wire ID of the wire rope (step S10). If the verification is successful (step S10: YES), the values ​​in the columns for the number of uses and the remaining battery charge are updated, and the process proceeds to step S13. On the other hand, if the verification is unsuccessful (step S10: NO), verification unsuccessful information is sent to the worker device 10 (step S11). Note that if the wire rope 60 being verified has been used 600 times or 36 months have passed since the date of registration, the wire rope management unit 21 transmits replacement promotion information to urge the worker to replace the wire rope 60. Furthermore, the wire rope is registered, for example, as an unusable wire rope so that the worker will not use the wire rope. If verification unsuccessful information is received, the slinging work support unit 11 displays a wire rope verification unsuccessful page (step S12) and returns to step S7.

[0056] If the verification is successful (step S10: YES), the wire rope management unit 21 refers to the wire rope management DB 23 and extracts the number of months of use and the number of times of use associated with each verified wire ID. Next, the wire rope management unit 21 refers to the wire rope type DB 22 and extracts the deterioration coefficient (hereinafter referred to as the first deterioration coefficient) corresponding to the number of times of use for each extracted wire ID and the deterioration coefficient (hereinafter referred to as the second deterioration coefficient) corresponding to the number of months of use. In addition, safe load information corresponding to the wire type information included in each wire ID is extracted from the two-wire suspension row in the wire rope type DB 22 (vertical, 10 to 60 degrees are extracted). Next, the wire rope management unit 21 transmits verification successful information (step S13). This verification successful information includes the safe load information, first deterioration coefficient, and second deterioration coefficient for the first wire rope 61 and the second wire rope 62, respectively.

[0057] When the verification OK information is received, the slinging work support unit 11 displays a wire rope verification OK page (step S14). The slinging work support unit 11 also stores the safe load information, the first deterioration coefficient, and the second deterioration coefficient for the first wire rope 61 and the second wire rope 62 included in the verification OK information in RAM or the like.

[0058] After checking the wire rope verification OK page, the worker slings the first wire rope 61 and the second wire rope 62 onto the suspended load 800. Once the slinging is complete, the suspended load 800 is temporarily hoisted by the crane (step S15). Temporarily hoisting refers to winding up the crane wire 70 until the load of the suspended load 800 is fully applied to the load detection device 40, and in the case of temporary hoisting, the crane wire 70 is wound up to the point where the suspended load is slightly suspended in the air.

[0059] After confirming that the load 800 has been temporarily suspended, the worker selects the sling angle calculation page and transmits a request for calculating the sling angle for two-rod suspension to the sling angle calculation device 30 (step S16).

[0060] When a request for calculating the sling angle for dual slinging is received, since the sling angle calculation unit 31 is for dual slinging, the UWB communication unit 32 receives radio waves from each of the first communication device 51 and the second communication device 52 (step S17). Note that here, the first receiving unit 321 and the second receiving unit 322 receive radio waves transmitted from the UWB communication unit 512 and the UWB communication unit 522, respectively.

[0061] When the UWB communication unit 32 receives radio waves from the first communication device 51 and the second communication device 52, the sling angle calculation unit 31 calculates the sling angle θA (see FIG. 3(a)) (step S18).

[0062] Next, the slinging angle calculation unit 31 determines whether the calculated slinging angle θA is within the range of a safe angle (60°) (Step S19). If the calculated slinging angle θA is within the range of a safe angle (60°) (Step S19: YES), the process proceeds to Step S22. On the other hand, if the calculated slinging angle θA is outside the range of the safe angle (60°) (Step S19: NO), angle NG information is transmitted to the worker device 10 (Step S20). If angle NG information is received, the slinging work support unit 11 displays a slinging angle NG page (Step S21) and instructs the worker to redo the slinging work (return to Step S15).

[0063] If the calculated sling angle θA is within the range of the safe angle (60°) (step S19: YES), the sling angle calculation unit 31 transmits angle OK information to the worker device 10 (step S22). The angle OK information includes the sling angle information (θA) calculated by the sling angle calculation unit 31.

[0064] When the angle OK information is received, the slinging work support unit 11 displays a slinging angle OK page (step S23). The slinging angle is displayed on this slinging angle OK page.

[0065] After checking the sling angle OK page, the worker selects the load detection button displayed on the sling angle OK page and sends a load detection request to the load detection device 40 (step S24). The load detection request includes the safe load information, first deterioration coefficient, second deterioration coefficient, and sling angle information calculated by the sling angle calculation unit 31 for each of the first wire rope 61 and the second wire rope 62.

[0066] Upon receiving the load detection request, the load detection unit 41 detects the load applied by the suspended load 800 based on the detection signal output from the load sensor. Upon detecting the load, the load detection unit 41 performs a load determination (step S25).

[0067] In this load determination, the safe load information for the first wire rope 61 and the second wire rope 62, whichever is lower, is extracted from the safe load information for the first wire rope 61 and the second wire rope 62 included in the load detection request. The reason for extracting the safe load information for the lower safe load is that the rope diameters of the first wire rope 61 and the second wire rope 62 may differ. Next, based on the sling angle information and the extracted safe load information, the safe load for the angle corresponding to the sling angle information is referenced. For example, if the sling angle information is 45°, the 50° column is referenced, and if the sling angle information is 56°, the 60° column is referenced. Next, the first deterioration coefficient for the first wire rope 61 is compared with the first deterioration coefficient for the second wire rope 62, and the larger value is set as the current first deterioration coefficient. The second deterioration coefficient for the first wire rope 61 is compared with the second deterioration coefficient for the second wire rope 62, and the larger value is set as the current second deterioration coefficient. The current safe load is calculated by multiplying the referenced safe load by the current first deterioration coefficient and the current second deterioration coefficient. In addition, in calculating the current safe load information, the first deterioration coefficient and the second deterioration coefficient for the first wire rope 61, and the first deterioration coefficient and the second deterioration coefficient for the second wire rope 62 may be multiplied.

[0068] The load detection unit 41 compares the current safe load with the detected load (detected load) and determines whether the detected load is within the safe load range (step S26). If the detected load is within the safe load range (step S26: YES), the process proceeds to step S30, whereas if the detected load is outside the safe load range (step S26: NO), load NG information is sent to the worker device 10 (step S27). If load NG information is received, the slinging work support unit 11 displays a sling load NG page (step S28) and instructs the user to start over from selecting a slinging method (return to step S7).

[0069] After displaying the sling load NG page (step S28), the worker device 10 transmits a log of each process in the current slinging work to the server 20 as sling process result information (step S29). This sling process result information includes a log in which information about each process from step S1 to step S28 is recorded in chronological order. Having received the sling process result information, the server 20 updates and stores the work log 24 based on the log included in the sling process result information (step S34). Note that if the detected load is outside the safe load range (step S26: NO), a log that enables the administrator of the server 20 to confirm that there was a problem with the current sling load is stored in the work log 24.

[0070] If the detected load is within the safe load range (step S26: YES), the load detection unit 41 transmits load OK information to the worker device 10 (step S30). The load OK information includes the result of the load judgment by the load detection unit 41 (such as the ratio of the detected load to the current safe load).

[0071] When the load OK information is received, the slinging work support unit 11 displays a slinging load OK page (step S31). The detected load is displayed on this sling load OK page. Next, the slinging work support unit 11 displays a slinging work result page that displays the results of this slinging work (step S32). Figure 7(c) is a diagram showing an example of a slinging work result page for two-point lifting.

[0072] Furthermore, after displaying the slinging work result page (step S32), the worker device 10 transmits a log of each process in the current slinging work to the server 20 as slinging work result information (step S33). This slinging work result information includes a log in which information about each process from step S1 to step S31 is recorded in chronological order. Having received the slinging work result information, the server 20 updates and stores the work log 24 based on the log included in the slinging work result information (step S34). If the detected load falls within the safe load range (step S26: YES), a log that enables the administrator of the server 20 to confirm that there is no problem with the current slinging load is stored in the work log 24.

[0073] After checking the sling load OK page (step S31), the worker performs the lifting work of the suspended load 800 temporarily suspended by the crane (step S36). When the lifting work is completed (step S37: YES), or if there is another suspended load 800 to be lifted (step S38: YES), the worker continues the work by selecting the slinging method (return to step S7). If there is no other suspended load 800 to be lifted (step S38: NO), the worker ends the work by logging off (step S39). The server 20 is notified that the worker has logged off.

[0074] (Example of 4-wire suspension) From here on, an example of four-strand suspension will be explained. Note that explanations of the processing sequence that is the same as the above-mentioned two-strand suspension example will be omitted, and only the differences will be explained. Note that, below, the wire ropes 60 used in four-strand suspension of the load 900 will be referred to as the first wire rope 61 to the fourth wire rope 64.

[0075] When four-point slinging is selected as the slinging method on the slinging method setting page displayed in step S7 (see FIG. 8(a)), the wire rope setting page is displayed. When the wire rope setting page is displayed, the worker reads the ID tag 511 of the first communicator 51 of the first wire rope 61 to be used for this slinging, the ID tag 521 of the second communicator 52 of the second wire rope 62, the ID tag 531 of the third communicator 53 of the third wire rope 63, and the ID tag 541 of the fourth communicator 54 of the fourth wire rope 64 with the RFID reader of the worker device 10 (step S8). FIG. 8(b) is a diagram showing an example of a screen displayed when the ID tags 511 to 541 are read by the RFID reader. When the ID tags 511 to 541 are read by the RFID reader, the wire IDs and remaining battery levels of the ID tags 511 to 541 are displayed.

[0076] When ID tags 511 to 541 are read by the RFID reader of worker device 10, a wire matching request is transmitted (step S9). This wire matching request includes information indicating that it is a four-strand suspension, the wire ID (wire ID stored in ID tag 511) and remaining battery level of first wire rope 61 read by the RFID reader, the wire ID (wire ID stored in ID tag 521) and remaining battery level of second wire rope 62, the wire ID (wire ID stored in ID tag 531) and remaining battery level of third wire rope 63, the wire ID (wire ID stored in ID tag 531) and remaining battery level of fourth wire rope 64, and the like.

[0077] If the verification is successful (step S10: YES), the wire rope management unit 21 updates the column for the number of uses in the wire rope management DB 23 (adding 1), updates the value in the column for the remaining battery charge, and then refers to the wire rope management DB 23 to extract the number of months of use and the number of uses associated with each verified wire ID. Next, the wire rope management unit 21 refers to the wire rope type DB 22 to extract a deterioration coefficient (hereinafter referred to as the first deterioration coefficient) corresponding to the number of uses for each extracted wire ID and a deterioration coefficient (hereinafter referred to as the second deterioration coefficient) corresponding to the number of months of use. Furthermore, the wire rope management unit 21 extracts safe load information corresponding to the wire type information included in each wire ID from the four-rope suspension column in the wire rope type DB 22. Next, the wire rope management unit 21 transmits verification success information (step S13). This verification success information includes the safe load information, first deterioration coefficient, and second deterioration coefficient for each of the first wire rope 61 to the fourth wire rope 64.

[0078] When the verification OK information is received, the slinging work support unit 11 displays a wire rope verification OK page (step S14). The slinging work support unit 11 also stores the safe load information, the first deterioration coefficient, and the second deterioration coefficient for the first wire rope 61 to the fourth wire rope 64 included in the verification OK information in RAM or the like.

[0079] After checking the wire rope verification OK page, the worker slings the first wire rope 61 to the fourth wire rope 64 onto the suspended load 900. When the slinging is complete, the worker temporarily suspends the suspended load 900 using a crane (step S15).

[0080] After confirming that the load 900 has been temporarily suspended, the worker selects the sling angle calculation page and transmits a request for calculating the sling angle for four-point suspension to the sling angle calculation device 30 (step S16).

[0081] When a sling angle calculation request for four-line slinging is received, since the sling angle calculation unit 31 is for four-line slinging, the UWB communication unit 32 receives radio waves from each of the first communication device 51 to the fourth communication device 54 (step S17). Note that here, the first receiving unit 321 and the second receiving unit 322 receive radio waves transmitted from the UWB communication unit 512, the UWB communication unit 522, the UWB communication unit 532, and the UWB communication unit 542, respectively.

[0082] When the UWB communication unit 32 receives radio waves from each of the first to fourth communication units 51 to 54, the sling angle calculation unit 31 calculates the sling angle θB and the sling angle θC (see FIG. 3(b)) (step S18).

[0083] Next, the slinging angle calculation unit 31 determines whether the calculated slinging angles θB and θC are all within the range of a safe angle (30°) (Step S19). If the calculated slinging angles θB and θC are all within the range of a safe angle (30°) (Step S19: YES), the process proceeds to Step S22. However, if any one of the calculated slinging angles θB and θC is outside the range of a safe angle (60°) (Step S19: NO), angle NG information is sent to the worker device 10 (Step S20). If angle NG information is received, the slinging work support unit 11 displays a slinging angle NG page (Step S21) and instructs the worker to redo the slinging work (return to Step S15).

[0084] If the calculated sling angles θB and θC are all within the range of the safe angle (30°) (step S19: YES), the sling angle calculation unit 31 transmits angle OK information to the worker device 10 (step S22). The angle OK information includes the sling angle information (θB, θC) calculated by the sling angle calculation unit 31.

[0085] After checking the sling angle OK page, the worker selects the load detection button displayed on the sling angle OK page and sends a load detection request to the load detection device 40 (step S24). The load detection request includes the safe load information, first deterioration coefficient, and second deterioration coefficient for each of the first wire rope 61 to fourth wire rope 64.

[0086] Upon receiving the load detection request, the load detection unit 41 detects the load applied by the suspended load 900 based on the detection signal output from the load sensor. Upon detecting the load, the load detection unit 41 performs a load determination (step S25).

[0087] In this load determination, the minimum safe load is extracted from the safe load information for the first wire rope 61 to the fourth wire rope 64 included in the load detection request. Next, the first deterioration coefficient for the first wire rope 61 to the first deterioration coefficient for the fourth wire rope 64 are compared, and the maximum value is set as the current first deterioration coefficient. The second deterioration coefficient for the first wire rope 61 to the second deterioration coefficient for the fourth wire rope 64 are compared, and the maximum value is set as the current second deterioration coefficient. Next, the current safe load is calculated by multiplying the minimum safe load by the current first deterioration coefficient and the current second deterioration coefficient. Note that in calculating the current safe load information, the first deterioration coefficient and the second deterioration coefficient for each of the first wire rope 61 to the fourth wire rope 64 may be multiplied.

[0088] When the load OK information is received, the slinging work support unit 11 displays a sling load OK page (step S31). The detected load is displayed on this sling load OK page. Next, the slinging work support unit 11 displays a sling work result page that displays the results of this sling work (step S32). Figure 8(c) is a diagram showing an example of a sling work result page using four-point lifting.

[0089] (Example of multi-stage lifting) Next, an example of multi-stage lifting will be explained. Figure 9(a) shows an example of multi-stage lifting (three stages). Note that explanations of the processing sequence that is the same as the two-stage or four-stage lifting described above will be omitted, and only the differences will be explained. Note that, below, the wire ropes 60 used in multi-stage lifting for the first stage load 810, the second stage load 820, and the third stage load 830 will be referred to as the first wire rope 61 to the sixth wire rope 66.

[0090] When multistage lifting (three stages) is selected as the slinging method on the slinging method setting page displayed in step 7 (see FIG. 10(a)), the wire rope setting page is displayed. When the wire rope setting page is displayed, the worker reads the ID tag 511 of the first communicator 51 of the first wire rope 61 to be used for this slinging, the ID tag 521 of the second communicator 52 of the second wire rope 62, the ID tag 531 of the third communicator 53 of the third wire rope 63, the ID tag 541 of the fourth communicator 54 of the fourth wire rope 64, the ID tag 551 of the fifth communicator 55 of the fifth wire rope 65, and the ID tag 561 of the sixth communicator 56 of the sixth wire rope 66, using the RFID reader of the worker device 10, and then inputs the weight and order (load information) of each of the loads 810 to 830 (step S8). Fig. 10(b) is a diagram showing an example of a screen displayed when ID tags 511 to 561 are read by an RFID reader. Fig. 10(c) is a diagram showing an example of a suspended load information input screen for inputting suspended load information. When ID tags 511 to 561 are read by an RFID reader, the wire IDs and remaining battery levels of ID tags 511 to 561 are displayed.

[0091] When the processing of step S8 is completed, a wire verification request is transmitted (step S9). This wire verification request includes information indicating that the suspension is a three-stage multi-stage suspension, the wire ID (wire ID stored in ID tag 511) and remaining battery level of first wire rope 61 read by the RFID reader, the wire ID (wire ID stored in ID tag 521) and remaining battery level of second wire rope 62, the wire ID (wire ID stored in ID tag 531) and remaining battery level of third wire rope 63, the wire ID (wire ID stored in ID tag 541) and remaining battery level of fourth wire rope 64, the wire ID (wire ID stored in ID tag 541) and remaining battery level of fifth wire rope 65, the wire ID (wire ID stored in ID tag 551) and remaining battery level of sixth wire rope 66, and the like.

[0092] If the verification is successful (step S10: YES), the wire rope management unit 21 updates the value in the column for remaining battery capacity in the wire rope management DB 23, then references the wire rope management DB 23 and extracts the number of months of use and the number of times of use associated with each verified wire ID. Next, the wire rope management unit 21 references the wire rope type DB 22 and extracts a deterioration coefficient (hereinafter referred to as the first deterioration coefficient) corresponding to the number of times of use for each extracted wire ID and a deterioration coefficient (hereinafter referred to as the second deterioration coefficient) corresponding to the number of months of use. Furthermore, the wire rope management unit 21 extracts safe load information corresponding to the wire type information included in each wire ID from the two-rope suspension column in the wire rope type DB 22. Next, the wire rope management unit 21 transmits verification successful information (step S13). This verification successful information includes the safe load information, first deterioration coefficient, and second deterioration coefficient for each of the first wire rope 61 to the sixth wire rope 66.

[0093] When the verification OK information is received, the slinging work support unit 11 displays a wire rope verification OK page (step S14). The slinging work support unit 11 also stores the safe load information, the first deterioration coefficient, and the second deterioration coefficient for the first wire rope 61 to the sixth wire rope 66 included in the verification OK information in RAM or the like.

[0094] After checking the wire rope verification OK page, the worker slings the first wire rope 61 and second wire rope 62 to the first stage load, the third wire rope 63 and fourth wire rope 64 to the second stage load, and the fifth wire rope 65 and sixth wire rope 66 to the third stage load. Once the slinging is complete, the first to third stages are temporarily hoisted by the crane (step S15).

[0095] After confirming that the first to third stages of the load have been temporarily suspended, the worker selects the sling angle calculation page and sends a request to calculate the sling angle for three-stage multi-stage lifting to the sling angle calculation device 30 (step S16).

[0096] When a sling angle calculation request for three-stage multistage lifting is received, since the sling angle calculation unit 31 is for three-stage multistage lifting, the UWB communication unit 32 receives radio waves from each of the first communication unit 51 to the sixth communication unit 56 (step S17). Note that here, the first receiving unit 321 and the second receiving unit 322 receive radio waves transmitted from the UWB communication unit 512, the UWB communication unit 522, the UWB communication unit 532, the UWB communication unit 542, the UWB communication unit 552, and the UWB communication unit 562, respectively.

[0097] When the UWB communication unit 32 receives radio waves from each of the first communication unit 51 to the sixth communication unit 56, the sling angle calculation unit 31 calculates the angle θD formed by the distance Y7 between the first receiving unit 321 and the UWB communication unit 512 and the distance Y8 between the first receiving unit 321 and the UWB communication unit 522, the angle θE formed by the distance Y9 between the first receiving unit 321 and the UWB communication unit 532 and the distance Y10 between the first receiving unit 321 and the UWB communication unit 542, and the angle θF formed by the distance Y11 between the first receiving unit 321 and the UWB communication unit 552 and the distance Y12 between the first receiving unit 321 and the UWB communication unit 562 (step S18).

[0098] Next, the slinging angle calculation unit 31 determines whether or not all of the calculated slinging angles θD to θF are within the range of a safe angle (60°) (Step S19). If all of the calculated slinging angles θD to θF are within the range of a safe angle (60°) (Step S19: YES), the process proceeds to Step S22. On the other hand, if any one of the calculated slinging angles θD to θF is outside the range of a safe angle (60°) (Step S19: NO), angle NG information is transmitted to the worker device 10 (Step S20). If angle NG information is received, the slinging work support unit 11 displays a slinging angle NG page (Step S21) and instructs the worker to redo the slinging work (return to Step S15).

[0099] If the calculated sling angles θD to θF are all within the range of the safe angle (60°) (Step S19: YES), the sling angle calculation unit 31 transmits angle OK information to the worker device 10 (Step S22). The angle OK information includes the sling angle information (θD to θF) calculated by the sling angle calculation unit 31.

[0100] After checking the sling angle OK page, the worker selects the load detection button displayed on the sling angle OK page and sends a load detection request to the load detection device 40 (step S24). The load detection request includes the safe load information for each of the first wire rope 61 to the sixth wire rope 66, the first deterioration coefficient, the second deterioration coefficient, and the suspended load information for the suspended loads 810 to 830.

[0101] Upon receiving the load detection request, the load detection unit 41 detects the loads applied by the first to third stages of the suspended loads based on the detection signals output from the load sensors. Upon detecting the load, the load detection unit 41 performs a load determination (step S25).

[0102] In this load determination, first, a load determination is made with respect to the safe loads of the first wire rope 61 and the second wire rope 62. The safe load information for the first wire rope 61 and the second wire rope 62, whichever is lower, is extracted from the safe load information for the first wire rope 61 and the second wire rope 62 included in the load detection request. Next, based on the sling angle information and the extracted safe load information, the safe load for the angle corresponding to the sling angle information is referenced. Next, the first deterioration coefficient for the first wire rope 61 is compared with the first deterioration coefficient for the second wire rope 62, and the larger value is set as the current first deterioration coefficient. The second deterioration coefficient for the first wire rope 61 is compared with the second deterioration coefficient for the second wire rope 62, and the larger value is set as the current second deterioration coefficient. Next, the current safe load is calculated by multiplying the referenced safe load by the current first deterioration coefficient and the current second deterioration coefficient. It is then determined whether the weight of the suspended load 810 is within the calculated safe load. In addition, in calculating the current safe load information, the first deterioration coefficient and the second deterioration coefficient for the first wire rope 61, and the first deterioration coefficient and the second deterioration coefficient for the second wire rope 62 may be multiplied.

[0103] Next, using a method similar to that used for the load determination using the first wire rope 61 and the second wire rope 62, the load determination using the third wire rope 63 and the fourth wire rope 64 for the weight of the suspended load 820, and the load determination using the fifth wire rope 65 and the sixth wire rope 66 for the weight of the suspended load 830 are performed.

[0104] When the load OK information is received, the slinging work support unit 11 displays a slinging load OK page (step S31). The detected load is displayed on this sling load OK page. Next, the slinging work support unit 11 displays a slinging work result page that displays the results of this slinging work (step S32). Figure 10(d) is a diagram showing an example of a slinging work result page for multi-stage lifting (three stages).

[0105] (Example of hanging a lantern) Next, we will explain an example of multi-stage suspension. Figure 9(b) shows an example of lantern suspension (three stages). Note that explanations of the processing sequence that is the same as the two-strand or four-strand suspension described above will be omitted, and only the differences will be explained. Note that, below, the wire ropes 60 used in multi-stage suspension for the first stage load, second stage load 820, and third stage load 830 will be referred to as the first wire rope 61 to the sixth wire rope 66.

[0106] When lantern lifting (three stages) is selected as the slinging method on the slinging method setting page displayed in step 7 (see FIG. 11(a)), the wire rope setting page is displayed. When the wire rope setting page is displayed, the worker reads the ID tag 511 of the first communicator 51 of the first wire rope 61, the ID tag 521 of the second communicator 52 of the second wire rope 62, the ID tag 531 of the third communicator 53 of the third wire rope 63, the ID tag 541 of the fourth communicator 54 of the fourth wire rope 64, the ID tag 551 of the fifth communicator 55 of the fifth wire rope 65, and the ID tag 561 of the sixth communicator 56 of the sixth wire rope 66 using the RFID reader of the worker device 10, and then inputs the weight and order (load information) of each of the loads 810 to 830 to be used for this slinging (step S8). Fig. 11(b) is a diagram showing an example of a screen displayed when an RFID reader reads ID tags 511 to 561. Fig. 11(c) is a diagram showing an example of a suspended load information input screen for inputting suspended load information.

[0107] When ID tags 511 to 561 are read by the RFID reader of worker device 10, a wire verification request is transmitted (step S9). This wire verification request includes information indicating that the lantern is a three-tiered lantern hanging, the wire ID (wire ID stored in ID tag 511) and remaining battery level of first wire rope 61 read by the RFID reader, the wire ID (wire ID stored in ID tag 511) and remaining battery level of second wire rope 62 (wire ID stored in ID tag 521) and remaining battery level of third wire rope 63 (wire ID stored in ID tag 531) and remaining battery level of fourth wire rope 64 (wire ID stored in ID tag 541) and remaining battery level of fifth wire rope 65 (wire ID stored in ID tag 551) and remaining battery level of fifth wire rope 65, and the wire ID (wire ID stored in ID tag 561) of sixth wire rope 66.

[0108] If the verification is successful (step S10: YES), the wire rope management unit 21 updates the value in the column for remaining battery capacity in the wire rope management DB 23, then references the wire rope management DB 23 and extracts the number of months of use and the number of times of use associated with each verified wire ID. Next, the wire rope management unit 21 references the wire rope type DB 22 and extracts a deterioration coefficient (hereinafter referred to as the first deterioration coefficient) corresponding to the number of times of use for each extracted wire ID and a deterioration coefficient (hereinafter referred to as the second deterioration coefficient) corresponding to the number of months of use. Furthermore, the wire rope management unit 21 extracts safe load information corresponding to the wire type information included in each wire ID from the two-rope suspension column in the wire rope type DB 22. Next, the wire rope management unit 21 transmits verification successful information (step S13). This verification successful information includes the safe load information, first deterioration coefficient, and second deterioration coefficient for each of the first wire rope 61 to the sixth wire rope 66.

[0109] When the verification OK information is received, the slinging work support unit 11 displays a wire rope verification OK page (step S14). The slinging work support unit 11 also stores the safe load information, the first deterioration coefficient, and the second deterioration coefficient for the first wire rope 61 to the sixth wire rope 66 included in the verification OK information in RAM or the like.

[0110] After checking the wire rope verification OK page, the worker slings the first wire rope 61 and second wire rope 62, which have the highest safe load value among the first wire rope 61 to sixth wire rope 66, to the first stage load. In addition, the worker slings the third wire rope 63 and fourth wire rope 64, which have a lower safe load value than (or the same safe load value as) the first wire rope 61 and second wire rope 62, from the first stage load to the second stage load. In addition, the worker slings the fifth wire rope 65 and sixth wire rope 66, which have a lower safe load value than (or the same safe load value as) the third wire rope 63 and fourth wire rope 64, from the second stage load to the third stage load. Once the slinging is complete, the first to third stages are temporarily hoisted by the crane (step S15).

[0111] After confirming that the first to third tiers of loads have been temporarily suspended, the worker selects the sling angle calculation page and sends a request to calculate the sling angle for three tiers of lantern suspension to the sling angle calculation device 30 (step S16).

[0112] When a request for calculating the sling angle for three-tiered lantern hanging is received, sling angle calculation unit 31 receives radio waves from each of first communication device 51 to sixth communication device 56 by UWB communication unit 32 because the hanging is three-tiered lantern (step S17). Note that here, first receiving unit 321 and second receiving unit 322 receive radio waves transmitted from UWB communication unit 512, UWB communication unit 522, UWB communication unit 532, UWB communication unit 542, UWB communication unit 552, and UWB communication unit 562, respectively.

[0113] When the UWB communication unit 32 receives radio waves from each of the first to sixth communication devices 51 to 56, the hanging angle calculation unit 31 determines the distances Y13, Y14, Y15, Y16, Y17, and Y18 between the first receiving unit 321 and the UWB communication units 512, 522, 532, 542, 552, and 562, respectively. Next, it determines whether the distances Y13 to Y18 satisfy the condition (usage condition) of "Y13≒Y14<Y15≒Y16<Y17≒Y18".

[0114] Next, the angle θG formed by the direction of the distance Y13 (virtual line Y13) between the first receiving unit 321 and the UWB communication unit 512 and the direction of the distance Y14 (virtual line Y14) between the first receiving unit 321 and the UWB communication unit 522 is calculated (step S18).

[0115] Next, the hanging angle calculation unit 31 determines whether the calculated hanging angle θG is within the range of the safe angle (60°) (step S19). If the usage condition is satisfied and the calculated hanging angle θG is within the range of the safe angle (60°) (step S19: YES), the process proceeds to step S22. On the other hand, if the usage condition is not satisfied or the calculated hanging angle θG is outside the range of the safe angle (60°) (step S19: NO), the angle NG information () is transmitted to the operator device 10 (step S20). When the angle NG information (including information indicating whether the usage condition is NG or the safe angle is NG) is received, the hanging work support unit 11 displays the hanging angle NG page (step S21) and instructs the operator to redo the hanging work (returns to step S15).

[0116] If the calculated hanging angle θG is within the range of the safe angle (60°) (step S19: YES), the hanging angle calculation unit 31 transmits the angle OK information to the operator device 10 (step S22). The angle OK information includes the hanging angle information calculated by the hanging angle calculation unit 31.

[0117] After checking the sling angle OK page, the worker selects the load detection button displayed on the sling angle OK page and sends a load detection request to the load detection device 40 (step S24). The load detection request includes the safe load information for each of the first wire rope 61 to the sixth wire rope 66, the first deterioration coefficient, the second deterioration coefficient, and the suspended load information for the suspended loads 810 to 830.

[0118] Upon receiving the load detection request, the load detection unit 41 detects the loads applied by the first to third stages of the suspended loads based on the detection signals output from the load sensors. Upon detecting the load, the load detection unit 41 performs a load determination (step S25).

[0119] In this load determination, first, a load determination is made with respect to the safe loads of the first wire rope 61 and the second wire rope 62. The safe load information for the first wire rope 61 and the second wire rope 62, whichever is lower, is extracted from the safe load information for the first wire rope 61 and the second wire rope 62 included in the load detection request. Next, based on the sling angle information and the extracted safe load information, the safe load for the angle corresponding to the sling angle information is referenced. Next, the first deterioration coefficient for the first wire rope 61 is compared with the first deterioration coefficient for the second wire rope 62, and the larger value is set as the current first deterioration coefficient. The second deterioration coefficient for the first wire rope 61 is compared with the second deterioration coefficient for the second wire rope 62, and the larger value is set as the current second deterioration coefficient. Next, the current safe load is calculated by multiplying the referenced safe load by the current first deterioration coefficient and the current second deterioration coefficient. It is then determined whether the total weight of the suspended loads 810 to 830 is within the calculated safe load. In addition, in calculating the current safe load information, the first deterioration coefficient and the second deterioration coefficient for the first wire rope 61, and the first deterioration coefficient and the second deterioration coefficient for the second wire rope 62 may be multiplied.

[0120] When the load OK information is received, the slinging work support unit 11 displays a slinging load OK page (step S31). The detected load is displayed on this sling load OK page. Next, the slinging work support unit 11 displays a slinging work result page that displays the results of this slinging work (step S32). Figure 11(d) is a diagram showing an example of a slinging work result page using lantern hanging (3 stages).

[0121] As described above, in this embodiment, the slinging angle of the wire rope 60 relative to the suspended load is calculated to determine whether the slinging angle is within an appropriate range. Also, it is determined whether the weight of the suspended load to be slinged is within the allowable range of the safe load of the wire rope 60. Therefore, it is possible to support the worker performing the slinging work with the aim of preventing human error in the slinging work.

[0122] <Modifications, etc.> The above-described technology of the present disclosure can be embodied in various forms, such as an information processing system, an information processing device, an information processing method, a program, or a recording medium.

[0123] Figure 12 is a diagram showing another example of a sling angle calculation method. Figure 12(a) shows an example in which the sling angle calculation device 30 is hung sideways on the hook 80, and an example in which the sling angle calculation device 30 is attached sideways to the crane wire 70 near the hook 80. When the sling angle calculation device 30 is installed sideways in this way, the second receiving unit 322 is arranged horizontally relative to the first receiving unit 321 (arranged with no inclination, right inclination, or left inclination).

[0124] Figure 12(b) is a diagram showing an example of a method for calculating the sling angle by the sling angle calculation unit 31 when the second receiving unit 322 is arranged horizontally relative to the first receiving unit 321 (arranged with no inclination, right inclination, or left inclination).

[0125] When calculating the sling angle using the first receiving unit 321 as a reference, the sling angle calculation unit 31 calculates the angles θ11 and θ12 using the method described above. Next, the sling angle calculation unit 31 calculates the angle θ1 based on the angles θ11 and θ12. When the second receiving unit 322 is horizontal with respect to the first receiving unit 321 (for example, 0° or within 0°±3°), the sling angle calculation unit 31 calculates the sling angle θA by doubling the value obtained by subtracting 90° from the angle θ1. On the other hand, when the second receiving unit 322 is inclined to the right with respect to the first receiving unit 321, the sling angle calculation unit 31 calculates the sling angle θA by doubling the value obtained by adding θα (a known, fixed, or appropriately measured angle) to the angle θ1 and subtracting 90° from the result. On the other hand, when the first receiving unit 321 is tilted to the left relative to the second receiving unit 322, the slinging angle calculation unit 31 calculates the slinging angle θA by doubling the value obtained by subtracting θα (a known, fixed, or appropriately measured angle) from the angle θ1 and then subtracting 90° from the result.

[0126] When calculating the sling angle using the second receiving unit 322 as a reference, the sling angle calculation unit 31 calculates the angles θ21 and θ22 using the method described above. Next, the sling angle calculation unit 31 calculates the angle θ2 based on the angles θ21 and θ22. When the second receiving unit 322 is horizontal with respect to the first receiving unit 321 (for example, 0° or within 0° ±3°), the sling angle calculation unit 31 calculates the sling angle θA by doubling the value obtained by subtracting 90° from the angle θ2. On the other hand, when the second receiving unit 322 is inclined to the right with respect to the first receiving unit 321, the sling angle calculation unit 31 calculates the sling angle θA by doubling the value obtained by subtracting θα (a known, fixed, or appropriately measured angle) from the angle θ2 and then subtracting 90° from the value obtained. On the other hand, when the first receiving unit 321 is inclined to the left relative to the second receiving unit 322, the slinging angle calculation unit 31 calculates the slinging angle θA by doubling the value obtained by adding θα (a known, fixed, or appropriately measured angle) to the angle θ2 and subtracting 90° from the result. Note that the angle θα may also be obtained by detecting the inclination of the slinging angle calculation device 30 using, for example, an inclination sensor or the like.

[0127] For example, the functions of the rigging work support unit 11, wire rope management unit 21, rigging angle calculation unit 31, and load detection unit 41 may be provided by cloud computing, in which an external computer (e.g., a cloud server, etc.) realizes some or all of the functions.

[0128] Furthermore, for example, some or all of the functions of the wire rope management unit 21 in the server 20, the wire rope type DB 22, and the wire rope management DB 23 may be provided in the slinging angle calculation device 30. In this case, it is conceivable that the slinging angle calculation device 30 and the wire rope 60 equipped with the communication device 50 are carried in as a set to each work site, and slinging work is performed at that work site. In this case, at a minimum, information related to the wire rope 60 carried in as a set with the slinging angle calculation device 30 is stored in the wire rope type DB 22 and the wire rope management DB 23.

[0129] Furthermore, for example, some or all of the functions of the slinging work support unit 11, wire rope management unit 21, sling angle calculation unit 31, and load detection unit 41, as well as some or all of the wire rope type DB 22 and wire rope management DB 23, may be provided in the worker device 10. In this case, it is possible to reduce the effects of communication failures in the communication network N.

[0130] <Additional Notes> Other inventions according to embodiments of the present disclosure will be described below.

[0131] Invention A1 is a slinging work support system comprising: a first communication device provided on a first wire rope, a second communication device provided on a second wire rope, a third communication device provided on a third wire rope, a fourth communication device provided on a fourth wire rope, and a sling angle calculation unit that calculates the sling angle formed by the first wire rope and the second wire rope with respect to a suspended load based on communication between the first communication device and the second communication device, and calculates the sling angle formed by the third wire rope and the fourth wire rope with respect to the suspended load based on communication between the third communication device and the fourth communication device.

[0132] Invention A2 is a rigging work support system described in Invention A1, which includes a load detection unit that detects the load of a load slinging by the first wire rope, the second wire rope, the third wire rope, and the fourth wire rope.

[0133] a first communication device provided on a first slinging device, a second communication device provided on a second slinging device, and a sling angle calculation unit that calculates a sling angle by the first slinging device and the second slinging device with respect to a suspended load based on communication between the first communication device and the second communication device, the first communication device being capable of communicating with the first communication device and the second communication device, and a second communication device being arranged at a predetermined distance from the first communication device and being capable of communicating with the first communication device and the second communication device, and the sling angle calculation unit calculates the sling angle by communication between the first communication device and the first communication device. Invention B1 of a rigging work support system that detects a distance Y1 between the first communication unit and the first communication device, detects a distance Z1 between the second communication unit and the first communication device through communication between the second communication unit and the first communication device, calculates an angle θ1 formed by the vertical direction of the first communication unit and the direction of the distance Y1, calculates an angle θa formed by the direction of the distance Y1 and the vertical direction of the first communication unit by subtracting or adding a value corresponding to the arrangement positions of the first communication unit and the second communication unit from or to the angle θ1, and calculates the rigging angle by doubling the value of angle θa.

[0134] a first communication device provided on a first slinging device, a second communication device provided on a second slinging device, and a sling angle calculation unit that calculates a sling angle by the first slinging device and the second slinging device with respect to a suspended load based on communication between the first communication device and the second communication device, the first communication device being capable of communicating with the first communication device and the second communication device, and a second communication device being arranged at a predetermined distance from the first communication device and being capable of communicating with the first communication device and the second communication device, and the sling angle calculation unit calculates the sling angle by communication between the second communication device and the second communication device. Invention B2 of a rigging work support system that detects a distance Y2 between the second communication unit and the second communication device, detects a distance Z2 between the first communication unit and the second communication device through communication between the first communication unit and the second communication device, calculates an angle θ2 formed by the vertical direction of the second communication unit and the direction of the distance Y2, calculates an angle θb formed by the direction of the distance Y2 and the vertical direction of the second communication unit by subtracting or adding a value corresponding to the arrangement positions of the first communication unit and the second communication unit from or to the angle θ2, and calculates the rigging angle by doubling the value of angle θb.

[0135] Invention B3 is a rigging work support method in which a computer executes each step in Invention B1. Invention B4 is a rigging work support program that causes a computer to execute each step in Invention B1. Invention B5 is a rigging work support method in which a computer executes each step in Invention B2. Invention B6 is a rigging work support program that causes a computer to execute each step in Invention B2.

[0136] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the embodiments, and various modifications and changes are possible within the scope of the gist of the present disclosure described in the claims. [Explanation of symbols]

[0137] 1 Slinging work support system, 10 Worker device, 11 Slinging work support unit, 12 Short-range communication unit, 13 Communication unit, 20 Server, 21 Wire rope management unit, 22 Wire rope type database, 23 Wire rope management database, 24 Work log, 30 Slinging angle calculation device, 31 Slinging angle calculation unit, 32 UWB communication unit, 33 Short-range communication unit, 40 Load detection device, 41 Load detection unit, 42 Short-range communication unit, 50 Communication device 51 First communication device, 52 Second communication device, 53 Third communication device, 54 Fourth communication device, 60 Wire rope, 61 First wire rope, 62 Second wire rope, 63 Third wire rope, 64 Fourth wire rope, 65 Fifth wire rope, 66 Sixth wire rope, 70 Crane wire, 80 Hook, 321 First receiving unit, 322 Second receiver, 511, 521, 531, 541, 551, 561 ID tag, 512, 522, 532, 542, 552, 562 UWB communication unit

Claims

1. a first communication device provided on the first slinging device; a second communication device provided on the second slinging device; a sling angle calculation unit that calculates a sling angle between the first slinging device and the second slinging device relative to a suspended load based on communication between the first communication device and the second communication device; A slinging work support system comprising:

2. 2. The slinging operation support system according to claim 1, further comprising a load detection unit that detects the load of the load slinging by the first slinging device and the second slinging device.

3. a first communication unit capable of communicating with the first communication device and the second communication device; a second communication unit that is arranged at a predetermined distance from the first communication unit and is capable of communicating with the first communication device and the second communication device; The sling angle calculation unit a distance Y1 between the first communication unit and the first communication device is detected through communication between the first communication unit and the first communication device, and a distance Z1 between the second communication unit and the first communication device is detected through communication between the second communication unit and the first communication device; detecting a distance Y2 between the first communication unit and the second communication device through communication between the first communication unit and the second communication device, and detecting a distance Z2 between the second communication unit and the second communication device through communication between the second communication unit and the second communication device; Calculating an angle θ1 between a vertical direction of the first communication unit and the direction of the distance Y1; Calculating an angle θ2 between a vertical direction of the first communication unit and the direction of the distance Y2; 3. The slinging operation support system according to claim 1, wherein the slinging angle is calculated as an angle formed by a direction of the distance Y1 and a direction of the distance Y2 based on the angle θ1 and the angle θ2.

4. The angle calculation unit 4. A slinging operation support system according to claim 3, wherein the angle θ1 and the angle θ2 are compared, and the larger angle is doubled to calculate the sling angle.

5. A slinging work support method executed by a computer, comprising: a first communication device provided on the first slinging device; a second communication device provided on the second slinging device, A slinging operation support method comprising: executing a sling angle calculation step of calculating a sling angle between the first slinging device and the second slinging device relative to a suspended load based on communication between the first communication device and the second communication device.

6. a first communication device provided on the first slinging device; a second communication device provided on the second slinging device, A slinging operation support program that causes a computer to execute a slinging angle calculation procedure that calculates a sling angle by the first slinging device and the second slinging device relative to a suspended load based on communication between the first communication device and the second communication device.

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