JP2020043964A - Alarming device for safety belt - Google Patents

Abstract

To provide an inexpensive alarming device capable of outputting a use state of a safety belt without requiring modification to an existing safety belt.SOLUTION: An alarming device 100 for a safety belt comprises: a detachable case 110 which is formed to cover a portion of a hook-shaped member 210 of a hook 200 from an external edge part with an inner surface of the portion being exposed; a lever 120 and a switch 140 which are provided on the case 110 and are detection means for detecting that the hook 200 has been hooked on a target object 10; a speaker 140 and an LED 150 which are notification means for performing a notification operation; and a control circuit 160 for controlling the notification means so as to report that the hook has been hooked on the target object 10 on the basis of a detection signal from the detection means.SELECTED DRAWING: Figure 4

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety belt worn by a worker working at a high place, and to a warning device for reporting a use state of the safety belt.

  When working at high places such as construction sites, workers are obliged to wear safety belts to prevent falls. The safety belt includes a human belt worn on the worker's body, a rope having one end connected to the human belt, and a hook provided at the other end of the rope. The human belt is roughly classified into a full harness type having a structure to support at a plurality of locations such as a shoulder, a waist, and a thigh of an operator, and a belt-shaped torso belt type worn on an operator's waist. In addition, there are also known ones provided with a shock absorber for absorbing a shock at the time of a crash stop at a connecting portion between a human body belt and a rope, and those provided with a rope winder having a lock mechanism. Prior to the work at height, the worker hooks a hook on a mounting device such as a main rope, a handrail of a scaffold or a building, and then performs work at height. The safety belt is also called a crash stop device.

  In order to prevent a crash, it is essential that workers use the safety belt correctly and reliably. Therefore, a system has been proposed for prompting a worker to wear a safety belt and managing a use state (see Patent Document 1). In the device described in Patent Literature 1, sensors such as a pressure sensor and an open / close sensor and a transmission circuit for wirelessly transmitting a sensor signal are provided on a hook, and a control box is provided on a human belt. The control box includes a sensor signal receiving unit, a speaker, an LED, and a control device. The control device of the control box performs various types of notification control using a speaker and an LED based on the sensor signal received from the hook, and transmits the use state of the safety belt to the personal computer by wireless communication. The personal computer manages the use state received from the safety belt and performs notification control as needed.

Japanese Patent No. 5116815

  However, the safety belt described in Patent Literature 1 uses a dedicated hook to which sensors and the like are attached, and in other words, cannot use an existing safety belt, and thus has a problem of high cost. Further, the safety belt described in Patent Literature 1 requires batteries for both the hook and the control box, so that there is a problem that complicated battery management and replacement work are required. In addition, there is a problem that convenience is lacking because it is necessary to perform an operation of turning on the power using both the hook and the control box during use. Furthermore, since the sensor signal is transmitted from the hook to the control box by wireless communication, depending on the work environment, proper operation may be hindered due to communication failure, and power consumption and cost may increase. is there.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive alarm device capable of issuing an alert on the use state of a safety belt without modifying the existing safety belt. Is to provide.

  In order to achieve the above object, the present invention is a safety belt alarm device used by being attached to a safety belt including a hook having a hook-shaped member, wherein a part of the hook-shaped member is exposed at its inner surface. A detachable case formed so as to cover from the outer edge in a state in which the hook is hooked on the first hooked object, provided on the case, and a notification operation. And a notification control unit that controls the notification unit to notify that the first object has been hung based on the detection signal of the detection unit.

  According to the present invention, since the case of the alarm device for the safety belt is formed so as to cover a part of the hook-like member of the hook of the safety belt from the outer edge with its inner surface exposed, It can be used simply by attaching it to an existing hook without preparing a hook. In addition, since the detection means, the notification means, and the notification control means are provided in one case and have a simple configuration that does not require other devices, the manufacturing cost can be reduced, and the convenience at the time of use is improved. It will be expensive.

Front view of alarm device for safety belt Top view of safety belt alarm device Left side view of alarm device for safety belt Front view showing the appearance of the safety belt alarm device attached to the hook Sectional drawing cut | disconnected in the position of the A line of FIG. 2 in the state which attached the alarm device for safety belts to the hook. FIG. 4 is a cross-sectional view taken along line B in FIG. 4. Front view of the hook to which the safety belt alarm device is attached Circuit diagram of alarm device for safety belt

  A safety belt alarm device according to one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the alarm device for safety belt, FIG. 2 is a top view of the alarm device for safety belt, FIG. 3 is a left side view of the alarm device for safety belt, and FIG. FIG. 5 is a front view showing a state of being attached to the hook, FIG. 5 is a cross-sectional view taken along a line A in FIG. 2 in a state where the safety belt alarm device is attached to the hook, and FIG. 6 is a sectional view taken along a line B in FIG. FIG. 7 is a cross-sectional view, and FIG. 7 is a front view of a hook to which the safety band alarm device is mounted.

  First, with reference to FIG. 7, the configuration of a hook to which the safety belt alarm device is mounted will be described. As shown in FIG. 7, the hook 200 includes a hook member 210, a locking member 220 that opens and closes the opening of the hook member 210, and a lock member 230 that restricts the opening and closing operation of the locking member 220. It has.

  The hook-like member 210 has a shape in which a plate-like member is curved so that an object to be hung such as a main rope or a handrail of a scaffold is hooked inside the opening. On one end side of the hook-shaped member 210, a connection hole 211 for connecting to a rope (not shown) of the safety belt is formed.

  One end of the retaining member 220 is rotatably attached inside the opening of the hook-shaped member 210 by a rivet 221. The other end of the stopper member 220 is formed so as to be locked inside the tip of the hook-shaped member 210. The retaining member 220 is urged by a spring 222 in a direction to close the opening of the hook-shaped member 210.

  One end of the lock member 230 is rotatably attached to the outside of the hook-shaped member 210 by a rivet 231. The lock member 230 is urged toward the outside of the hook member 210 by a spring 232. A slide groove 233 is formed in the lock member 230. The slide groove 233 overlaps with a part of the stopper member 220, and a rivet 223 provided on the stopper member 220 is inserted therethrough. The slide groove 233 is formed such that the rivet 223 of the stopper member 220 moves in the slide groove 233 as the lock member 230 rotates when the stopper member 220 closes the opening of the hook-shaped member 210. ing. Further, the slide groove 233 is formed such that the rivet 223 moves in the slide groove 233 in accordance with the rotation of the retaining member 220 when the lock member 230 is rotated in the direction of the hook member 210. .

  Next, the configuration of the safety zone alarm device according to the present embodiment will be described. As shown in FIGS. 1 to 6, the alarm device 100 for a safety belt includes a case 110, a lever 120 and a switch 130 that constitute a detection unit that detects that the hook 200 is hooked on the object 10. A speaker 140 and a plurality of LEDs 150, which are notification means for performing a notification operation, and notification control means for controlling the notification means to notify that the object has been hung on the object 10 based on a detection signal of the detection means. And a control circuit 160.

  The case 110 is formed to have a substantially U-shaped cross section so as to cover a part of the hook-shaped member 210 of the hook 200, specifically, a curved portion from an outer edge with its inner surface exposed. The inner edge of the case 110 at a location that covers the curved portion of the hook-shaped member 210 is such that the hooked object 10 does not collide with the case 110 when the hook 200 is hung on the hooked object 10 or the impact due to the collision is reduced. , Is located at the same or slightly outside of the inner edge of the curved portion of the hook-shaped member 210. In other words, the ridge line at the inner edge of the case 110 coincides with or is located slightly inside the hook-shaped member 210 of the hook 200, specifically, the ridge line at the inner edge of the curved portion. The case 110 can be detachably fixed to the hook member 210 by a pressing member (a plurality of screws 111 in the present embodiment) that presses the hook member 210 from both sides while sandwiching the hook member 210 in the thickness direction. I have.

  In the case 110, a box 112 for accommodating the speaker 140, the switch 130, and the control circuit 160 is formed at an end of the hook member 210 on the side of the connection hole 211. Further, the box portion 112 is formed with a hooking piece 113 facing outward, which is to be hooked on an object to be hooked, which is different from that used for fall prevention, such as a human body belt of a safety belt or a belt of work clothes. .

  A groove 114 for accommodating the lever 120 is formed inside the curved portion of the case 110 and on one of the left and right bottom surfaces. The lever 120 is rotatably provided in the groove 114 by a rivet 115. The lever 120 is urged by a spring 116 provided at an end of the lever 120 inward of the curved portion of the hook-shaped member 210. The movable range of the lever 120 is regulated by locking pieces 117a and 117b that come into contact with the end of the lever 120. Here, the lever 120 normally has a curved portion of the hook-like member 210 of the hook 200 so that when the hook 200 is hooked on the hooked object 10, the lever 120 rotates in contact with the hooked object 10. Is located slightly inside the ridgeline of the inner edge.

  The switch 130 is a sensor that detects that the lever 120 has rotated by abutting on the workpiece 10. The switch 130 is arranged such that the end of the lever 120 operates the actuator of the switch 130 when the lever 120 rotates.

  Recesses 118 and 119 formed along the curvature of the hook-shaped member 210 are formed on the upper surface and both side surfaces of the case 110. On the bottom surface of each of the recesses 118 and 119, a plurality of LEDs 150 as light emitting elements are provided at intervals. The depths of the recesses 118 and 119 are formed such that the head of the LED 150 is exposed from the outer surface of the case 110. This secures the visibility of the LED 150 and protects the LED 150 from being broken by an obstacle.

  The speaker 140 is, for example, a piezoelectric speaker. The box portion 112 of the case 110 is provided with an acoustic hole (not shown) for emitting a sound emitted from the speaker 140 to the outside.

  FIG. 8 shows a circuit diagram of the alarm device for the safety belt. As shown in FIG. 8, a switch 130, a speaker 140, and an LED 150 are connected to the control circuit 160. The control circuit 160 includes a battery and a power switch (not shown), and operates by turning on the power switch and supplying power from the battery. The control circuit 160 includes an input circuit for the switch 130, a drive circuit for the speaker 140, and a drive circuit for the LED 150.

  When the control circuit 160 detects the rotation of the lever 120 by the switch 130, the control circuit 160 performs predetermined notification control so as to notify that the hook 200 has been hooked on the object 10 using the speaker 140 and the LED 150. Specifically, for example, voice data “safe” is stored in a predetermined storage unit in advance, and the voice data is controlled to be output from the speaker 140 a predetermined number of times (for example, twice). Further, for example, control is performed to blink all the LEDs 150 at a predetermined interval for a predetermined time (for example, 3 seconds). It should be noted that the notification by sound (reporting that appeals to hearing) and the notification by light (reporting that appeals to vision) may be performed only on one of them, or both may be performed as in the present embodiment.

  As shown in FIG. 4, such a safety belt alarm device 100 is attached to the hook 200 by covering the curved portion of the hook-shaped member 210 of the hook 200 from the outside and fixing it with the screw 111. The worker turns on the power of the safety belt alarm device 100 before using the safety belt, such as before working at a high place or moving, and moves the hook 113 of the safety belt alarm device 100 to the position of the safety belt. Hang it on an object to be hung different from that used for fall prevention, such as a human belt or a workwear belt. Here, before the use of the safety belt, the alarm device 100 for the safety belt does not operate, so that erroneous notification can be prevented.

  Then, when the worker hooks the hook 200 on a parent rope or a handrail of a scaffold to use the safety belt, the lever 120 of the alarm device 100 for the safety belt rotates, and the speaker 140 and the LED 150 perform a notification operation. . Thereby, the worker can be made to recognize that the hook 200 of the safety belt is used reliably.

  As described above, according to the alarm device 100 for a safety belt according to the present embodiment, the case 110 is configured such that the hook-shaped member 210 of the hook 200 of the safety belt has a portion on the outer edge with its inner edge exposed. Since it is formed so as to cover from the part, it can be used simply by attaching it to an existing hook without preparing a dedicated hook. In addition, since the detection means, the notification means, and the notification control means are provided in one case 110 and have a simple configuration that does not require other devices, the manufacturing cost can be reduced, and the convenience at the time of use can be reduced. Will also be high.

  In addition, according to the alarm device 100 for a safety belt according to the present embodiment, the case 110 has a hook-like shape by the screw 111 that is a pressing member that presses the hook-shaped member 210 from both sides while sandwiching the hook-shaped member 210 in the thickness direction. Since the device can be fixed to the member 210, the attachment and detachment of the safety belt alarm device 100 to and from the hook 200 can be performed reliably and easily.

  In addition, according to the alarm device 100 for a safety belt according to the present embodiment, the case 110 has the hook 113 for hooking on another object to be hung, such as a human belt of a safety belt or a belt of work clothes. Is formed, it is possible to prevent the notification operation from being performed except when the safety belt is used.

  Further, according to safety belt alarm device 100 according to the present embodiment, LED 150 is arranged on the bottom surfaces of recesses 118 and 119 formed in case 110 such that the head of LED 150 is exposed from the outer surface of case 110. Therefore, the visibility of the LED 150 can be ensured, and the LED 150 can be protected from being broken by an obstacle.

  As mentioned above, although one Embodiment of this invention was described in detail, this invention is not limited to this. For example, in the above embodiment, the hook 113 is formed on the case 110, but the hook 113 may be omitted.

  Further, in the above-described embodiment, the lever 120 and the switch 130 are used as means for detecting that the hook 200 is hooked on the object to be hooked 10, but the rotation of the lever 120 is detected by the optical sensor, Other sensors, such as using a pressure sensor, may be used.

  Further, in the above-described embodiment, the plurality of LEDs 150 are provided on the upper surface and the side surface of the case 110 as the light notification unit, but the number and the installation location of the LEDs 150 are irrelevant. Further, a light emitting element other than the LED may be used.

  Further, in the above-described embodiment, the screw 111 for pressing the hook-shaped member 210 so as to be sandwiched is used as a means for detachably fixing the case 110 to the hook-shaped member 210. For example, the case member 210 and the hook member 210 may be detachably fixed to the case 110 and the hook member 210 by another structure such as supporting the member 210.

DESCRIPTION OF SYMBOLS 10 ... Hanging object 100 ... Safety belt alarm device 110 ... Case 118, 119 ... Concave part 120 ... Lever 130 ... Switch 140 ... Speaker 150 ... LED
160: control circuit 200: hook 210: hook-like member 220: retaining member 230: locking member

Claims (7)

A safety belt alarm device used by being attached to a safety belt including a hook having a hook-like member,
A detachable case formed to cover a part of the hook-shaped member from the outer edge with the inner edge exposed,
Provided in the case,
Detecting means for detecting that the hook is hooked on the first hooked object;
An informing means for performing an informing operation;
And a notification control means for controlling the notification means so as to notify that the first hanging object has been hung on the basis of the detection signal of the detection means. The safety case according to claim 1, wherein the case is fixable to the hook-shaped member by a pressing member that presses the hook-shaped member from both sides while sandwiching the hook-shaped member in a thickness direction thereof. Information device. The safety case according to claim 1 or 2, wherein the case is formed with a hook for hooking on a second object to be hung such as a human belt of a safety belt or a belt of work clothes. Information device. The detecting means includes a lever that rotates when the hook is hooked on the first hooked object and contacts the first hooked object, and a sensor that detects the rotation of the lever. The alarm device for a safety belt according to any one of claims 1 to 3, characterized in that: The notification means includes an audio device,
The alarm device for a safety belt according to any one of claims 1 to 4, wherein the notification control unit outputs a sound from the audio device. The alarm device for a safety belt according to any one of claims 1 to 5, wherein the notifying unit includes a light emitting element provided to be exposed on an outer surface of the case. A recess is formed in the outer surface of the case, and the light emitting element is arranged on the bottom surface of the recess with its head exposed from the outer surface of the case. Alarm device.

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