safety harness

Abstract

To provide a safety belt that allows easy confirmation that work is being performed in a safe state. [Solution] The safety belt includes a waist belt worn by a worker, a work positioning rope, a metal hook, and a metal D-ring. One end of a first wire (15) is electrically connected to the metal hook (3), and one end of a second wire (16) is electrically connected to the metal D-ring (4), and a wire break detector (11) detects continuity / discontinuity between these first and second wires. By using the metal hook and metal D-ring as the movable and fixed contacts of a switch (SW), the wire break detector detects a wire break when the metal hook comes off the metal D-ring. When continuity between the first and second wires is detected and this state continues for a predetermined time, the device issues a warning that the safety belt is not properly worn.

Description

[Technical Field]

[0001] This invention relates to a work positioning device that allows the wearer to work while leaning their body against a rope, a so-called U-shaped suspension waist belt type safety belt. [Background technology]

[0002] Patent Document 1 describes a hook detection device that photographs a worker with an imaging device, analyzes the image, and outputs a warning signal if it detects that the worker is not using the hook of the safety belt.

[0003] Patent document 2 also describes a monitoring system that acquires images of a work site where workers equipped with safety harnesses are working, detects color images of the colors attached to the hooks of the safety harnesses and color images of the colors attached to the handrails or lifelines at the work site, and determines the usage status of the hooks based on the color images of the hooks and the color images of the handrails or lifelines. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6903251 [Patent Document 2] Patent No. 7380307 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the hook detection device described in Patent Document 1 and the monitoring system described in Patent Document 2 are applied to work positioning equipment used for pole-top work on utility poles, etc., there is a problem in that it is difficult to secure a place to install the imaging device, and the imaging device must be reinstalled every time the utility pole being worked on is moved.

[0006] Furthermore, blind spots occur when a worker changes their working position with a single camera, so multiple cameras are required, which inevitably leads to larger equipment and systems and higher costs.

[0007] The present invention was made in consideration of the above circumstances, and its purpose is to provide a safety belt that makes it easy to check whether work is being carried out in a safe manner. [Means for solving the problem]

[0008] The safety belt according to the present invention comprises a waist belt worn by a worker, a work positioning rope connected to the waist belt, a metal hook attached to the end of the work positioning rope, a metal D-ring fixed to the waist belt and onto which the metal hook is hung during work, a first wire having one end electrically connected to the metal hook, a second wire having one end electrically connected to the metal D-ring, a wire break detector disposed between the other ends of the first and second wires and detecting continuity / non-continuity of the first and second wires, and a clock value setting circuit for changing the setting of the clock time, and when the wire break detector detects non-continuity of the first and second wires, the clock value setting circuit changes. The device comprises a timer that starts timing, at least one of a light-emitting device that issues an alert by emitting light and a sound-emitting device that issues an alert by sound, and a wireless communication device that issues an alert via wireless communication to the supervisor's mobile communication terminal, and is equipped with an alerting means that alerts the worker and supervisor of improper wearing when the disconnection detector detects a discontinuity between the first and second wiring and the timer has counted down to a predetermined time, the disconnection detector, the timer, and the alerting means are attached to the waist belt, the metal hook and the metal D-ring are used as the movable contact and fixed contact of a switch, and the disconnection detector is used to detect continuity / discontinuity between the first and second wiring, thereby solving the above-mentioned problem.

[0009] According to the above configuration, the metal hook and metal D-ring are used as the movable contact and fixed contact of the switch, and the disconnection detector detects when the metal hook comes off the metal D-ring, and the alarm means notifies the worker or supervisor.

[0010] Furthermore, the disconnection detector detects a discontinuity between the first and second wiring, and when the timer has counted down to a predetermined time, it issues an alert indicating improper installation, thereby reducing false detections caused by temporary non-contact between the metal hook and metal D-ring due to the worker's actions.

[0011] Furthermore, the above-mentioned problem is solved by attaching the disconnection detector, the timer, and the notification means to the waist belt.

[0012] By attaching the disconnection detector, timer, and alarm means to the waist belt, the worker can be notified if the safety belt is forgotten or not worn properly, without being affected by surrounding environmental factors such as noise.

[0013] The timer solves the above-mentioned problem by including a count value setting circuit that changes the count time setting.

[0014] By making it possible to change the setting of the clock time, the clock time can be shortened or lengthened depending on the type of work and the worker, thereby reducing false detections due to differences in the type of work and the worker.

[0015] Furthermore, the above-mentioned problem is also solved by the fact that the notification means includes at least one of a light emitting device that notifies by emitting light and a sound generating device that notifies by an alarm sound.

[0016] By providing the notification means with at least one of a light emitting device and a sound generating device, it is possible to alert the worker by emitting light and / or sounding an alarm that the safety belt has been forgotten to be worn or is not being worn properly.

[0017] Furthermore, the above-mentioned problem is also solved by providing the notification means with a wireless communication device that notifies the mobile communication terminal of the monitor by wireless communication.

[0018] By providing the notification means with a wireless communication device, it is possible to notify the supervisor's mobile communication terminal via wireless communication that the worker has forgotten to wear the safety belt or that the safety belt is not being worn properly. [Effects of the Invention]

[0019] With the safety belt of this invention, when the connection between the metal hook and the metal D-ring is released for a predetermined time or longer, the alarm means can notify the worker or supervisor. In addition, by electrically detecting the connection and release between the metal hook and the metal D-ring, the device and system can be made relatively simple and cost-effective.

[0020] Therefore, a safety belt can be provided that allows easy confirmation that work is being performed in a safe state. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing an example of the configuration of a safety belt according to an embodiment of the present invention. [Figure 2] 2 is a block diagram showing an example of the configuration of a safety confirmation device that detects the connection state between the metal hook and the metal D-ring in the safety belt shown in FIG. 1.

[0023] FIG. [Figure 3] 3 is a flowchart for explaining the operation of the safety confirmation device shown in FIG. 2. [Figure 4] FIG. 2 is a perspective view showing an example of work using the safety belt shown in FIG. 1. [Figure 5] 4 is a block diagram showing an example of the configuration of a monitoring system using the safety confirmation device shown in FIG. 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] Figure 1 shows an example of the configuration of a safety harness (work positioning device) according to an embodiment of the present invention. This safety harness is called a "pole-mounted safety harness," in which a rope is looped around a structure such as a utility pole in a U-shape, and the wearer rests their body against the rope. It includes a waist belt 1, a work positioning rope 2, a metal hook 3, and metal D-rings 4-1 and 4-2.

[0024] The waist belt 1 is worn around the worker's waist together with the auxiliary belt 1a, and a work positioning rope 2 is connected to the waist belt 1 via an extension adjuster 5. A metal hook 3 is attached to the end of the work positioning rope 2. The metal hook 3 has a safety device 3a and a slip-off prevention device 3b.

[0025] Metal D-rings 4-1 and 4-2 onto which a metal hook 3 is attached during work are fixed to the waist belt 1. A buckle 6 is provided at one end of the waist belt 1, and the other end of the belt is fastened to a belt hole or the like through the buckle 6, allowing the belt to be worn around the waist.

[0026] 2 shows an example of the configuration of a safety confirmation device 10 that detects whether the metal hook 3 is hooked onto the metal D-ring 4-1 or 4-2 (connected state). The safety confirmation device 10 includes a wire break detector 11, a timer 12, and an alarm (alert means) 13. The safety confirmation device 10 is housed in a housing (not shown) and can be attached to the waist belt 1 or auxiliary belt 1a.

[0027] When the main switch 14 is turned on, the wire break detector 11 detects whether a first wire 15, one end of which is electrically connected to the metal hook 3, is connected to a second wire 16, one end of which is electrically connected to the metal D-rings 4-1 and 4-2 (collectively designated by 4), and whether there is continuity or non-conduction between the first and second wires 15, 16. In other words, the wire break detector 11 uses the metal hook 3 as the movable contact of the switch SW and the metal D-ring 4 as the fixed contact of the switch SW, and detects whether the metal hook 3 is connected to or disconnected from the metal D-ring 4 (whether the switch SW is on or off).

[0028] The first wiring 15 is woven into, for example, the work positioning rope 2, and routed through the auxiliary belt 1a via the expansion adjuster 5. The second wiring 16 is routed through the auxiliary belt 1a.

[0029] The timer 12 starts timing when the disconnection detector 11 detects a discontinuity between the first and second wirings 15, 16. The timer 12 is equipped with a timing value setting circuit 12a that changes the timing time setting by operating a setting dial 17.

[0030] The alarm 13 is equipped with a light-emitting device 13a such as an LED that emits light to alert, and a sound-emitting device 13b such as a buzzer or bell that emits an alarm sound, and alerts the worker if they have forgotten to wear the safety belt or if they are wearing it improperly by emitting light and sound.

[0031] When the disconnection detector 11 detects a discontinuity between the first and second wirings 15, 16 and a predetermined time set in the timer value setting circuit 12a has elapsed since the timer 12 started timing (represented by an AND gate 18 in Figure 2), the alarm 13 notifies the operator with light and an alarm sound.

[0032] FIG. 3 is a flowchart for explaining the operation of the safety confirmation device 10 shown in FIG.

[0033] First, the worker puts on a safety belt and turns on the main switch 14 of the safety confirmation device 10 immediately before starting work (step ST1).

[0034] Next, within the time set on the timer 12, as shown in Figure 4, the worker hooks the metal hook 3 onto the metal D-ring 4-1 (or 4-2) so that the work positioning rope 2 wraps around a utility pole 19 or the like (step ST2), and supports his / her body while working (step ST3).

[0035] During the work, the wire break detector 11 detects continuity, and in this state the work continues by returning to step ST3. On the other hand, if the electrical connection between the metal hook 3 and the metal D-ring 4-1 is temporarily cut off or if the worker removes the metal hook 3 from the metal D-ring 4-1, the wire break detector 11 detects a discontinuity between the first and second wirings 15, 16 (step ST4).

[0036] Upon detecting this non-conduction, the timer 12 starts counting (step ST5). At this point, the alarm 13 does not operate.

[0037] Then, when non-conduction of the first and second wirings 15, 16 is detected in step ST4 and the predetermined time set by the timing in step ST5 has elapsed (step ST6), the alarm 13 is activated and issues an alarm by emitting light from the light-emitting device 13a and sounding an alarm from the sound-producing device 13b (step ST7).

[0038] In step ST6, the operation continues by returning to step ST3 until a predetermined time has elapsed, and if it is determined in step ST4 that the electrical connection between the metal hook 3 and the metal D-ring 4-1 has been restored, the operation continues by returning to step ST3.

[0039] In this way, when the connection between the metal hook 3 and the metal D-ring 4-1 is released for a period of time equal to or longer than the predetermined period set in the timer 12, the alarm 13 can alert the worker with light and sound. In this case, by alerting the worker to improper attachment when the timer 12 has counted down to the predetermined period of time, it is possible to prevent false detections due to temporary non-contact between the metal hook 3 and the metal D-ring 4-1 caused by the worker's actions.

[0040] Therefore, a safety belt can be provided that allows easy confirmation that work is being performed in a safe state.

[0041] Fig. 5 is a block diagram showing an example of the configuration of a monitoring system 100 using the safety confirmation device 10 shown in Fig. 3. In Fig. 5, parts corresponding to those in Fig. 3 are given the same reference numerals.

[0042] It is similar to the circuit shown in Figure 2 in that a metal hook 3 and a metal D-ring 4 (4-1, 4-2) are used as the movable contact and fixed contact of the switch SW, and a wire break detector 11 is used to detect continuity / non-continuity between the first and second wiring 15, 16, but it differs in that a control judgment device 20 and a wireless communication device 21 are provided and a notification is sent via wireless communication to the monitor's mobile communication terminal 22, such as a tablet or smartphone.

[0043] That is, the continuity / non-continuity between the first and second wirings 15, 16 detected by the disconnection detector 11 is input to the control decision device 20, and when the timing operation of the timer 12 detects that the non-continuity has continued for a predetermined period of time, the alarm 13 emits light and sounds an alarm to notify the worker that the safety belt has been forgotten to be worn or is not being worn properly, and the wireless communication device 21 transmits this information to the supervisor by wireless communication.

[0044] When the information is received by the mobile communication terminal 22, it is displayed on the display screen, so that the supervisor can be notified that a worker has forgotten to wear a safety belt or is wearing it improperly. When multiple workers are working, it is also possible to identify each worker by assigning an identification code to the control decision device 20 in advance.

[0045] According to the above-described configuration, when the connection between the metal hook and the metal D-rings 4-1, 4-2 is released for a period of time set in the timer 12 or longer, the alarm 13 can notify the supervisor, making it easy to check whether the work is being carried out in a safe manner.

[0046] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.

[0047] For example, in the above-mentioned embodiment, a pole-mounted safety belt was used as an example, but it is of course possible to similarly apply the present invention to a "slope safety belt" that is used by the wearer to rest their body on a rope when working at height.

[0048] Furthermore, although the alarm has been described as having both a light emitting device and a sound generating device, it is of course possible to have only one of them, and the alarm can also be made by vibration or the like.

[0049] Furthermore, although the safety confirmation device has been described as being attached to a waist belt or auxiliary belt, it can also be configured to be placed in a pocket of the worker's clothing or worn on the body in the form of a bracelet or necklace. [Explanation of symbols]

[0050] 1...Waist belt 1a...Auxiliary belt 2...Work positioning rope 3...Metal hook 3a…Safety device 3b...Prevention device 4…Metal D ring 4-1…Metal D ring 4-2…Metal D ring 5…Expansion adjuster 6...Buckle 7...Tip stopper 10…Safety confirmation device 11...Disconnection detector 12...Timer 12a...Time value setting circuit 13...Alarm (alarm means) 13a...light-emitting device 13b...sound generating device 14...Main switch 15...1st wiring 16…Second wiring 17...Setting dial 18...And Gate 19...Telephone pole 20...Control decision device 21...Wireless communication device 22...Mobile communication terminal 100...Surveillance system SW...Switch

Claims

1. a waist belt worn by the worker; a work positioning rope connected to the waist belt; a metal hook provided at the end of the work positioning rope; a metal D-ring fixed to the waist belt and onto which the metal hook is hung during work; a first wiring having one end electrically connected to the metal hook; a second wiring having one end electrically connected to the metal D-ring; a disconnection detector provided between the other ends of the first and second wirings and detecting continuity / discontinuity of the first and second wirings; a timer including a time count setting circuit for changing the setting of the time count, the timer starting time counting when the disconnection detector detects that the first and second wirings are disconnected; a notification means including at least one of a light-emitting device that notifies by light emission and a sound-emitting device that notifies by an alarm sound, and a wireless communication device that notifies by wireless communication to a mobile communication terminal of a supervisor, the notification means notifying the operator and the supervisor of improper installation when the disconnection detector detects a discontinuity between the first and second wirings and the timer has elapsed a predetermined time; Equipped with The disconnection detector, the timer, and the notification means are attached to the waist belt, The metal hook and the metal D-ring are used as a movable contact and a fixed contact of a switch, and the open circuit detector is used to detect continuity / non-continuity between the first and second wirings. A safety belt characterized by:

2. The safety belt according to claim 1 of the registered utility model, further comprising a control and judgment device which receives time information from the timer and information on continuity / non-continuity between the first and second wiring lines detected by the disconnection detector, and which, when the timing operation of the timer detects that non-continuity has continued for a predetermined period of time, notifies the worker of improper wearing by the notification means and causes the wireless communication device to transmit a notification of improper wearing to an observer.

3. The safety belt according to claim 2 of the registered utility model is characterized in that an identification code is assigned to the control determination device in advance, and when multiple workers are working, an identification code is assigned to each worker.

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