JP2017051271A - Safety belt use state management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety belt use state management method capable of more accurately grasping whether or not a safety belt is hooked to a main rope.SOLUTION: In a safety belt having a waist belt, a life rope 12, one end of which is attached to the waist belt, and a hook 13 attached to the other end of the life rope, a configuration of a management method includes: a step for imaging a hooking part 13f of the hook with a camera 21 fixed to a part of the hook; an early stage step for subjecting an image captured with the camera to image processing to make it into image data, and causing a storage device to store the image data; and a later stage step for causing a display device on a management terminal side to display the image based on the image data. Radio communication is conducted in at least one of the early stage step and the later stage step.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a safety belt usage status management method for managing a safety belt usage status by an aerial worker.

  In order to prevent a crash at a high altitude worker, a business operator who performs the work is obliged to have the high altitude worker use a safety belt. The safety belt mainly includes a waist belt, a lifeline having one end attached to the waist belt, and a hook attached to the other end of the lifeline. A worker at high altitude wears a waist belt around the waist and works while hooking a pipe called a “master rope” or a solid long bar material erected on the work site. As a result, even if the worker loses his / her posture or removes his / her foot from the scaffolding, the worker's body is supported by the master rope via the lifeline, thus avoiding a crash.

  The administrator needs to manage whether or not the worker is using the safety belt properly, but it is not possible for the administrator to visually check the situation of the worker working at a high place from the ground. Have difficulty. In addition, it is common to manage a plurality of workers per manager, but it is impossible to view the situation of a plurality of workers who work at remote positions at the same time.

  For this reason, conventionally, various techniques for detecting the usage status of the safety belt using a sensor have been proposed (see, for example, Patent Documents 1 and 2). The technique of Patent Document 1 has been proposed on the assumption that a winding device for storing a lifeline uses a safety belt of a type attached to a waist belt. Specifically, two types of tags are provided in the safety zone: an RFID tag that constantly transmits radio waves, and an RFID tag that transmits radio waves when a lifeline is pulled out from the winding device by a predetermined length. Multiple tag readers that receive radio waves from With this configuration, the lifeline was pulled out of the winding device even though it was detected that the worker was at the site of the high-altitude work by receiving the radio wave from the RFID tag that constantly transmits radio waves. When the radio wave from the RFID tag that sometimes transmits the radio wave is not detected, it is determined that the worker is not using the safety belt.

  Patent Document 2 discloses a safety belt provided with a hook sensor at a hook hook portion. The hook sensor has a pair of switch pieces and a spring that is biased in a direction to separate the switch pieces. When the hook is hooked on something, the pair of switch pieces come into contact with each other against the biasing force of the spring and the switch is turned on, and this is detected.

  However, just because the lifeline is pulled out of the winding device does not mean that the hook is hooked on the masterline. Further, even if the hook sensor detects that the hook is hooked on something, the “something” is not necessarily a master rope. For example, a general safety belt is provided with a ring-shaped hook hanger on the waist belt to temporarily hook the hook. Even in the state where the hook is hooked on the hook hanger, the techniques of Patent Documents 1 and 2 determine that the safety belt is properly used. That is, even if the hook is forgotten while hooked on the hook hanger due to carelessness, the operator cannot be alerted.

  In addition, it is necessary to frequently hook and remove the hook from the master rope during high-altitude work, so it is necessary to perform detection with sensors for workers who feel that the operation is complicated. Some people are working at high places with hooks hooked on hook hangers, belt loops of trousers, etc. with the intention of escaping. The techniques of Patent Documents 1 and 2 cannot resist the act of intentionally and improperly using the safety belt.

Japanese Patent No. 499729 Japanese Patent No. 3390421

  Therefore, in view of the above circumstances, an object of the present invention is to provide a safety belt usage status management method capable of more accurately grasping whether or not a safety belt is hooked on a master rope. .

In order to solve the above-described problem, a safety band usage status management method according to the present invention (hereinafter, simply referred to as “management method”)
“In a safety belt having a waist belt, a lifeline having one end attached to the waist belt, and a hook attached to the other end of the lifeline, a hooking portion of the hook is attached by a camera fixed to a part of the hook. Imaging step;
The first step of storing the image data in the storage device, and image processing the image picked up by the camera into image data;
A late step of displaying an image based on the image data on the display device on the management terminal side;
Comprising
Wireless communication is performed at least one of the first and second steps.

  According to this configuration, the hook hooking part is imaged by a camera fixed to a part of the hook, and an image based on this is displayed on the display device on the management terminal side. Thereby, the administrator can confirm whether the hook is hooked on something, and, when it is hooked, whether it is a master rope or not. Therefore, unlike the above-described conventional technology, the administrator can confirm the usage status of the safety belt without misidentifying the situation where the hook is hooked on the hook hanger or the belt loop of the trousers as an appropriate usage status. Accurately grasp.

  In addition, wireless communication is performed in at least a part of the process of displaying the image based on the image data on the display device on the management terminal side after the image picked up by the camera is processed. The manager who is able to grasp the usage status of the safety belt.

  Furthermore, since the operator always has the consciousness of being “seen” by taking an image with the camera, inappropriate use of the safety belt can be effectively suppressed.

  In addition, since the image data is stored in the storage device, the administrator can perform various analyzes using the stored image data, and the image data can be used as a proof of the usage status of the safety belt. Can be stored for a period.

In addition to the above configuration, the safety belt usage status management method according to the present invention includes:
“In the previous step, the outline of the hooking part is extracted as a straight line, and whether or not the hook is hooked on the master rope based on whether or not the extracted straight line is divided and divided. It includes a determination process for determining.

  When a straight line is extracted from an image based on imaging when the hook is hooked on the master rope, the outline of the hook hook portion and the contour of the master rope are extracted as intersecting straight lines. Since the camera is fixed to the hook, the direction and position of the outline of the hooking part in the image are known and constant, and only the outline of the hooking part can be extracted from the extracted straight line. The straight line thus extracted is divided by the thickness of the crossing parent rope. On the other hand, when the hook is hooked not on the master rope but on the hook hanger or trouser belt, the length of the extracted straight line is different from the thickness of the master rope. On the other hand, when the extracted straight line is not divided, the hook is not hooked on anything. Therefore, it is possible to determine whether or not the hook is hooked on the master rope by comparing the length of the extracted straight line with the known thickness of the master rope. .

  In this configuration, whether or not the hook is hooked on the master rope is determined by a determination process using an image. This allows the manager observing the image to notify the manager and / or operator of this without waiting for the hook to notice that the hook is not hooked on the master rope. Is possible. For example, when it is determined that the hook is not hooked on the master rope as a result of the determination process, at the worker side terminal or the management terminal, a warning is given by at least one of lighting, vibration, and alarm sound. Can do. Or it can be set as the structure which displays a warning on the screen of the display apparatus of the management terminal side.

  As described above, as an effect of the present invention, it is possible to provide a safety belt usage status management method capable of more accurately grasping whether or not a safety belt is hooked on a master rope.

It is a block diagram of the safety belt which attached the camera and the worker side terminal. It is a principal part enlarged view of the safety belt | band | zone of FIG. It is a block diagram of the other example of the safety belt which attached the camera and the worker side terminal. It is a block diagram of the management system which uses the management method of this invention. It is a block diagram of the other management system which uses the management method of this invention. It is a block diagram of the modification of the management system of FIG. It is explanatory drawing of a determination process. It is a flowchart of a first half step. It is explanatory drawing of the image displayed on a display apparatus. It is explanatory drawing of a hook cover. It is explanatory drawing of the other example of fixation to another camera and a hook.

  Hereinafter, a management method according to a specific embodiment of the present invention and a management system using the management method will be described with reference to FIGS. Prior to the description of the management method, the configuration of the management system will be described. The management system includes a safety belt 10 having a waist belt 11, a lifeline 12 having one end attached to the waist belt 11, a hook 13 attached to the other end of the lifeline 12, and a hooking portion 13f of the hook 13 in an imaging field of view. It includes a camera 21 fixed to a part of the hook 13 so as to include, a worker side terminal 30 fixed to the waist belt 11, and management terminals 61 and 62 used by the manager.

  First, the configuration of the safety belt 10 to which the camera 21 and the worker side terminal 30 are fixed will be specifically described with reference to FIGS. 1 to 3. The waist belt 11 of the safety belt 10 is composed of a belt body 11a having a buckle 11b at its end, and one end of a rope as a lifeline 12 is attached to the belt body 11a. A hook 13 is attached to the other end of the lifeline 12 via a ring-shaped member 19. The hook 13 includes a hook arm 13a having a substantially U-shaped outer shape, and a rotating arm 13b fastened to a base end portion 13c of the hook arm 13a so as to be rotatable around a shaft 13p. In the hook arm 13a, the inner peripheral surface of the substantially U-shaped curved portion is a hook portion 13f that comes into contact with the hook object.

  The rotating arm 13b is made of a member having a U-shaped cross section, and a small camera 21 is fixed in the internal space. FIG. 2 shows a state where the camera 21 is fixed to the rotating arm 13b by a partially cutaway view.

  Although the detailed illustration of the configuration of the camera 21 is omitted, the objective lens and the imaging module are mainly configured. The imaging module generates an imaging element that is arranged on the imaging surface of the objective lens and photoelectrically converts an optical image of a subject, an AD conversion circuit that digitally converts an image signal photoelectrically converted by the imaging element, and a timing pulse And an interface for serially converting the digitally converted image signal and transmitting it together with the clock signal. A transmission cable 22 is connected to the interface of the camera 21. The cable 22 is pulled out from the inner space of the rotating arm 13b and arranged along the outer peripheral surface of the rotating arm 13b. It is arranged along and is connected to the worker side terminal 30. As the cable 22, a cable for serial signal transmission such as a USB cable can be used.

  In the present embodiment, since the optical axis of the objective lens is not directed toward the hooking portion 13f in the camera 21, a mirror 23 that forms a reflected image on the objective lens is disposed in the internal space of the rotating arm 13b. The positional relationship between the mirror 23 and the camera 21 is set so that the hooking portion 13f is included in the field of view taken by the camera 21 (the range indicated by the one-dot chain line in FIG. 2). If the camera 21 can be fixed to the hook 13 so that the optical axis of the objective lens faces the hooking portion 13f depending on the shape and size of the hook 13, the mirror 23 may be omitted.

  In the safety belt 10 shown in FIG. 1, a small computer is fixed as the worker side terminal 30. The computer includes a CPU, a main storage device, and an auxiliary storage device as main hardware configurations, and further includes a communication device 31 and a notification device 35 that perform wireless communication. The notification device 35 includes an LED illumination 35a that lights and blinks illuminations of different colors, a vibrator (not shown) that generates vibration, and a speaker 35b that generates an alarm sound. As the auxiliary storage device, an external storage medium such as a memory card may be used in addition to the one built in the computer. In the vicinity of the computer, a battery 39 as a drive power source for the computer and the camera 21 is attached to the waist belt 11 and is detachably connected to the computer.

  As the worker side terminal 30, a smartphone can be used as illustrated in FIGS. 3A and 3B. The smartphone is the same as the computer of FIG. 1 in that the CPU, main storage device, and auxiliary storage device are the main hardware configurations, but the communication device that performs wireless communication, the LED illumination 35a as the notification device 35, the vibrator ( (Not shown) and a speaker (not shown) are already built in as a basic configuration. Further, since the battery is also built in, the overall configuration of the safety belt 10 is simpler than the case where the battery 39 separate from the worker side terminal 30 is attached to the waist belt 11 as in the example of FIG. There is an advantage that around 11 is not bulky.

  FIG. 3B is an example in which the cable 22 extending from the camera 21 does not reach the worker side terminal 30. In the lifeline 12, a wireless transmission device 25 that wirelessly transmits an image signal is attached in the vicinity of the end on the hook 13 side, and a cable 22 is connected thereto. As such a wireless transmission device 25, a short-distance wireless communication standard transmission device such as Bluetooth (registered trademark) can be used. Further, in the vicinity of the wireless transmission device 25, a battery 29 as a driving power source for the wireless transmission device 25 and the camera 21 is attached to the lifeline 12, and is detachably connected to the wireless transmission device 25. In addition, although the smart phone is used as the worker side terminal 30 in the example of FIG.3 (b), a small computer provided with the communication apparatus which performs short-distance wireless communication may be sufficient.

  In this way, it is not necessary to arrange the cable 22 over the entire length of the lifeline 12 by transmitting the image signal by short-range wireless communication. Thereby, even if it is a safety belt | band | zone of the type which has a winding device which winds up and stores the lifeline 12, it has an advantage which does not have trouble in winding of the lifeline 12. On the other hand, when the image signal is transmitted from the camera 21 to the worker side terminal 30 via the cable 22 (wired), there is an advantage that the communication is more stable than the wireless case.

  The management system using the management method of this embodiment includes a management terminal in addition to the safety belt 10 to which the camera 21 and the worker side terminal 30 are fixed. Here, a case where there are two types of management terminals, that is, a management terminal 61 used by the administrator in the management office and a management terminal 62 that can be used while the administrator is moving is illustrated. Each of the management terminals 61 and 62 has a CPU, a main storage device, and an auxiliary storage device as main hardware configurations. The management terminal 61 is a general-purpose computer, and includes a communication device that performs communication via the wired LAN 80 and a communication device that performs communication via the Internet 81, and is connected to a monitor or printer as a display device. On the other hand, the management terminal 62 is a tablet-type portable information terminal, and incorporates a communication device that performs wireless communication using a wireless LAN such as WiFi, and a monitor as a display device.

  All of the management systems configured as described above use the following management method. That is, in a safety belt 10 having a waist belt 11, a lifeline 12 having one end attached to the waist belt 11, and a hook 13 attached to the other end of the lifeline 12, the camera 21 fixed to a part of the hook 13 is hooked by the camera 21. A step of capturing the 13 hooking sections 13f, a step of capturing the image by the camera 21 into image data and storing the image data in the storage device, and an image based on the image data on the management terminals 61 and 62 side. A later-stage step for displaying on the display device, and performing wireless communication at least one of the earlier-stage step and the later-stage step. In the previous step, the contour of the hooking portion 13f is extracted as a straight line L2, and the hook 13 is hooked on the master rope B based on whether or not the extracted straight line L2 is divided and divided. A determination process for determining whether or not there is included. Various configurations are possible as the management system depending on where the wireless communication is performed in the first step or the second step.

  The management system 1 shown in FIG. 4 uses a management method for performing wireless communication only in the later steps. The worker side terminal 30 of the management system 1 has, as functional configurations, a wireless communication unit 41 that performs wireless communication, and an image processing unit 42 that performs image processing based on a signal transmitted via the cable 22 and generates image data. And a determination notification means 43 for notifying the notification device 35 based on the determination result of whether or not the hook 13 is hooked on the master rope B, and a storage means 44 for storing the image data and the determination result in the auxiliary storage device. And image providing means 45 for transmitting image data via the wireless communication means 41 in response to a request signal, and a program for causing the processor to function as each means is stored in the main storage device. The auxiliary storage device corresponds to the “storage device” of the present invention.

  Next, the flow of processing in the management system 1 will be described mainly with reference to FIGS. FIG. 8 is a flowchart of the previous step. When imaging by the camera 21 is started, data is first initialized (step S1). For example, the camera 21 captures 5 frames per second. Based on the image signal and clock signal serially transmitted from the camera 21 via the cable 22, image processing is performed on the image signal based on the first (N = 1) imaging to generate image data (step S2). Image processing includes processing for converting a serial signal into parallel, correction of color tone, distortion caused by using a curved mirror, and the like.

  Images based on the image data are schematically shown in FIGS. 7 (a-1) and (b-1). FIG. 7A-1 is an image in a situation where the hook 13 is not hooked on anything (hereinafter, sometimes referred to as “non-holding situation”), and only the hooking portion 13f is photographed. FIG. 7B-1 is an image in a situation where the hook 13 is hooked on the master rope B (hereinafter sometimes referred to as “master rope holding situation”), and the master rope is in front of the hook portion 13f. B crosses. When edge extraction is performed for each image (step S3), in the non-holding state, only the contour line L1 of the hooking portion 13f is extracted as shown in FIG. In this case, as shown in FIG. 7 (b-2), the contour line L1 of the hooking portion 13f and the contour line L1 of the parent rope B intersecting with this are extracted.

  Next, a straight line is extracted by Hough transform (step S4). At this time, only the outline of the hook 13f of the hook 13 is extracted as a straight line L2. Since the camera 21 is fixed to the hook 13, the direction and position of the contour line of the hooking part 13f in the image are known and constant, and only the contour line of the hooking part 13f is extracted from the extracted straight lines as a straight line L2. Can be extracted as As a result, in the case of the non-holding state, the straight line L2 is not divided as shown in FIG. 7 (a-3), and in the case of the parent rope holding state, it intersects as shown in FIG. 7 (b-3). A straight line L2 divided by a length corresponding to the thickness of the master rope B is obtained. Therefore, the length at which the straight line L2 is divided (hereinafter referred to as “division length”) is detected (step S5). In the case of the straight line L2 that is not divided, the division length is zero.

  Since the thickness of the master rope B is known, if a threshold value is set in advance based on this, it is determined whether the hook 13 is hooked on the master rope B by comparing the divided length with the threshold value. Can be determined. Since the width of the hook hanger or the belt of the pants is shorter than the thickness of the master rope B, it can be determined that the hook 13 is not hooked on the master rope B when the split length is smaller than the threshold. When the division length is equal to or greater than the threshold (Yes in Step S6), it is determined that the parent rope is held, and “1” is assigned as the situation information (Step S7). On the other hand, when the division length is smaller than the threshold value (No in step S6), it is determined that the situation is a non-holding situation, and “0” is assigned as the situation information (step S8). Further, a signal is sent to the notification device 35, and a warning is given to the worker by the LED illumination 35a, vibration, and alarm sound (step S9). In addition, as a mode of notification by the LED illumination 35a, the green illumination that makes “safety” image is turned on when the parent rope is held, and the red that makes “danger” image turns on or blinks when it is not held. It can be set as an aspect.

  Along with the situation information given as described above, image data and imaging time information based on the clock signal are stored in the auxiliary storage device (step S10). Since the processing of one image for the imaging of one frame has been completed so far, 1 is added to N (step S11), the process returns to step S2, and the image processing based on the imaging of the next frame is similarly performed.

  By repeating the above processing, a database in which image data and status information are arranged in time series is stored in the auxiliary storage device of the worker side terminal 30. When the administrator views images, the management terminals 61 and 62 send a request signal for requesting image viewing to the worker side terminal 30 by wireless communication using a wireless LAN such as WiFi. At this time, the management terminal 61 connected to the wired LAN 80 in the office performs wireless communication via the access point 71.

  The worker terminal 30 that has received the request signal transmits image data to the management terminals 61 and 62. As a result, as shown in FIG. 9, images based on the images taken by the camera 21 can be displayed in time series on the display devices on the management terminals 61 and 62 side. Note that the image data transmitted to the management terminals 61 and 62 need not be image data corresponding to the total number of frames captured by the camera 21, but may be image data at predetermined time intervals or every predetermined number of images. it can. FIG. 9 illustrates a case where an image is displayed every 3 seconds.

  In addition, the image displayed on the display device can be displayed based on the situation information. For example, the field for displaying the frame of the image and the imaging time information is displayed in green when the parental rule is held, and is displayed in red when the flag is not held. As a result, the manager who monitors the screen can easily grasp whether the parent rope is held or not held.

  Note that the identification code of the camera 21 can be assigned to the image data transmitted from the worker side terminal 30 to the management terminals 61 and 62. The identification code of the camera 21 is also the identification code of the safety belt 10 to which the camera 21 is fixed, and is also the identification code of the worker wearing the safety belt 10. Accordingly, by simultaneously displaying images from the plurality of cameras 21 on the display device, it is possible to simultaneously manage the usage status of the safety belt 10 of a plurality of workers.

  Next, a management system 2 that uses a management method for performing wireless communication at least in the first half step will be described with reference to FIG. The management system 2 includes a management server 50 connected to the Internet 81 as a configuration different from the management system 1. The management server 50 is a general-purpose computer having a CPU, a main storage device, an auxiliary storage device, and a communication device that performs communication via the Internet 81. Unlike the management system 1 in which the processor of the worker side terminal 30 functions as the storage unit 44 and the image providing unit 45, the management system 2 causes the processor of the management server 50 to function as the storage unit 44 and the image providing unit 45.

  In the previous step, the worker side terminal 30 that has performed up to step S9 attaches the identification code of the camera 21 to the image data, the imaging time information, and the situation information, and transmits them to the management server 50. At this time, the worker side terminal 30 performs wireless communication such as WiFi and connects to the Internet 81 via the access point 71. When the administrator browses images, the management terminals 61 and 62 connect to the Internet 81 and send a request signal for browsing the images to the management server 50. At this time, the management terminal 62 that performs wireless communication such as WiFi is connected to the Internet 81 via the access point 71. The management server 50 transmits image data to the management terminals 61 and 62 in response to the request signal.

  In this way, even if the storage device for storing the image data is placed in the management server 50 on the Internet 81 so that the distance between the worker side terminal 30 and the management terminals 61 and 62 is long, in other words. Even if the operator and the manager are very far apart, the usage status of the safety belt 10 can be managed without any problem.

  A management system 2b shown in FIG. 6 is a modification of the management system 2 described above, in which the worker side terminal 30 is a smartphone and the mobile phone network 82 is connected to the Internet 81 as an access network. The worker-side terminal 30 communicates with the nearest base station 75 and connects to the Internet 81 via the gateway 76 of the mobile phone network 82. Even if the worker-side terminal 30 is a smartphone, any of the management systems 2 and 2b can be adopted as long as it is a type that can be connected to the Internet 81 via WiFi.

  As described above, according to the management method of the present embodiment and the management systems 1, 2, and 2b using the management method, the administrator pulls on the hook 13 of the safety belt 10 of the worker at high altitude. Whether or not it is hung and whether or not it is hooked can be accurately grasped by an image even from a remote position.

  Further, since the image data is stored together with the situation information, the administrator can perform various analyzes using the stored information and can save it as evidence of the use situation of the safety belt 10. Note that only status information (“1” or “0”) can be displayed in time series on the display devices of the management terminals 61 and 62. Further, after image data or the like is stored in the auxiliary storage device of the worker side terminal 30, the data may be moved to another terminal or the storage devices of the management terminals 61 and 62 via a storage medium such as a memory card. Good.

  Furthermore, in this embodiment, whether or not the hook 13 is hooked on the master rope B is automatically determined by a determination process using an image, and notification is given by the notification device 35 based on the determination result. Made. Thus, a warning can be issued to the operator without waiting for the administrator to notice that the safety belt 10 is not being used properly by observing the image. In particular, in the above embodiment, since the image processing and the determination processing based on the image data are performed by the worker side terminal 30, the processing from imaging to notification by the camera 21 is performed very quickly (almost in real time). Has advantages.

  The preferred embodiments have been described above, but the present invention is not limited to the above-described embodiments, and various improvements and designs can be made without departing from the scope of the present invention as described below. It can be changed.

  For example, the above embodiment exemplifies a case where at least image processing and determination processing are performed at the worker side terminal among image processing, determination processing, storage in a storage device, and provision of image data according to a request signal. . However, the present invention is not limited to this, and it may be configured to be performed on another terminal or the management terminal side including image processing and determination processing. In this case, an image signal obtained by digitally converting the image captured by the camera is wirelessly transmitted to another terminal or the management terminal via the communication device of the worker side terminal. Moreover, the signal based on the result of the determination process is transmitted from the other terminal or the management terminal to the worker side terminal, and is notified at the worker side terminal.

  Further, as shown in FIG. 10A, a hook cover 90 that is thick and has a different color from the hook 13 may be attached to the outer peripheral surface of the hook portion 13 f of the hook 13. When an image is taken from the camera 21 in this state, as shown in FIG. 10B, the hook cover 90 having a different color is photographed on the outer side along the outline of the hook portion 13f of the hook 13. Thereby, in the determination process, it is possible to extract the straight line L2 of the hooking portion 13f without performing edge extraction, and thus the number of steps of the determination process can be reduced.

  Further, in the above embodiment, the case where the camera 21 and the worker side terminal 30 are connected by the cable 22 is exemplified for the case where the camera 21 is connected to the worker side terminal 30 by wire. However, the present invention is not limited to this. A flexible endoscope of a fiber scope type or a video scope type may be used as a camera, and the distal end of the scope may be fixed to the hook 13 and the proximal end portion of the scope may be connected to the operator side terminal 30.

  Further, the fixing position of the camera 21 on the hook 13 is not limited to the internal space of the rotating arm 13b as long as the hooking portion 13f is included in the imaging field of view of the camera 21. For example, as illustrated in FIG. 11, at the base end portion 13 c that is connected to the lifeline 12 in the hook 13, a position that does not interfere with the rotating arm 13 b and the lifeline 12 (the ring-shaped member 19 that connects the lifeline 12 and the hook 13). In addition, the camera 21 can be fixed. In FIG. 11, the casing of the camera 21 is partially cut away.

  In addition, in order to temporarily hook the hook 13, the ring-shaped hook hanger generally provided in the safety belt 10 can be colored differently from the master rope B. Thereby, since the master rope B and the hook hanger can be distinguished also by the color information in the image, the hook 13 is hooked on the master rope B by using it together with the above-described determination processing based on the threshold value. It is possible to more accurately determine whether or not there is.

1, 2, 2b Management system 10 Safety belt 11 Waist belt 12 Lifeline 13 Hook 13f Hook 21 Camera 30 Worker side terminal 35 Notification device 61, 62 Management terminal

Claims (2)

In a safety belt having a waist belt, a lifeline having one end attached to the waist belt, and a hook attached to the other end of the lifeline, a hooking portion of the hook is imaged by a camera fixed to a part of the hook And steps to
The first step of storing the image data in the storage device, and image processing the image picked up by the camera into image data;
A late step of displaying an image based on the image data on the display device on the management terminal side;
Comprising
A safety band usage status management method, wherein wireless communication is performed in at least one of the first and second steps. In the preceding step, the outline of the hooking part is extracted as a straight line, and whether or not the hook is hooked on the master rope based on whether or not the extracted straight line is divided and the divided length. The method for managing the use status of a safety belt according to claim 1, further comprising a determination process for determining.

Images