JP5307654B2 - Safety belt check device - Google Patents

Description

  The present invention relates to a check device for a safety belt used in a work place at a high place.

Generally, when working at a high place on a construction site, an operator attaches a safety belt to his / her waist and attaches a hook provided at the tip of a lifeline (rope) connected to the safety belt to a scaffold or a master rope. It is attached to the support part of the work. And it is managed by, for example, a work manager visually confirming that the safety belt is used reliably and legally.
By the way, in the case of railway construction, it is often done at night when there is no train operation, but at such nighttime work, forgetting to attach the hook of the safety belt of workers working at high places or illegal It is extremely difficult for the work manager to visually confirm the correct mounting method.
Further, for example, Patent Document 1 discloses a technique for emitting a warning or light on a worker's waist belt via a cable along a rope when a sensor or the like is attached to a hook and the hook is attached to a support portion. Yes.

  In Patent Document 1, a coil is built in a hook, a lead wire connected to the coil is extended to the belt along the rope, and a current sensor, warning means, control means, battery, etc. are incorporated in the belt. If the hook is attached to the main rope with magnetic material and moved along the main rope, an electromotive force is generated in the coil of the hook, and current is applied to the conductor. A safety band is disclosed in which an energization sensor detects the occurrence of an electromotive force and judges that a warning is unnecessary, and when a hook is not attached to the master rope, a timer is used to issue a warning after a predetermined time has elapsed. .

Japanese Patent Laid-Open No. 11-267237

However, the conventional safety belt check device has the following problems.
That is, in the safety device of Patent Document 1, the cable is wired so as to be embedded inside the rope connecting the belt and the hook, but this reduces the predetermined function of the rope, that is, the strength and stretchability of the rope. However, there is a problem that there is a risk that the safety belt use standard may not be satisfied.
In addition, for example, when a failure such as a contact failure occurs in a cable or the like, repair on site is difficult and the safety belt itself needs to be replaced, so there is room for improvement in that respect.

The present invention has been made in view of the above-described problems, and provides a safety belt check device that can confirm the use state of a safety belt even during night work without degrading the safety belt function. With the goal.
Another object of the present invention is to provide a safety belt check device that is easy to attach and detach and has excellent versatility.

In order to achieve the above object, a safety belt check device according to the present invention comprises a hook that is detachably connected to a support portion, a belt that a worker wears, and a rope that connects the belt and the hook. A safety belt check device that is provided in a safety belt for checking a hook attachment state, a device main body, a first sensor that detects a predetermined axial direction of the device main body with reference to a vertical direction, and a first sensor A display device that operates differently depending on the detection result of the sensor, and a fixture that removably attaches the device body to the rope by winding the device body around the rope so that a predetermined axial direction of the device body is parallel to the rope. The first sensor and the display device are integrally provided in the device main body.
In addition, when the axial direction of the apparatus main body is within a predetermined angle range that is angularly moved with respect to the vertical direction, the direction of the apparatus main body is preferably set to a normal state.

In the present invention, the apparatus main body integrally provided with the first sensor and the display device is attached by the fixture so that the axial direction thereof is parallel to the rope of the safety belt, so that the predetermined direction of the apparatus main body is determined based on the vertical direction. Therefore, the direction of the rope at the position where the apparatus main body is attached in parallel to the axial direction can be detected.
Therefore, the normal state is set when the axial direction of the apparatus main body detected by the first sensor, that is, the direction of the rope is within a predetermined angular range that is angularly moved with respect to the vertical direction, and the predetermined angular range is deviated. Is set as an abnormal state, the display device operates normally when the orientation of the device body detected by the first sensor is normal, and the normal state is displayed by the display device when the device is in an abnormal state. It is possible to cause an abnormal operation different from the normal operation. For example, when the display device is a light emitter or a buzzer, the light emitter flashes at regular intervals when the orientation of the device body detected by the first sensor is normal, and the light emitter flashes when the orientation is abnormal. You can flash the flash and display a buzzer.

  In other words, when the hook of the safety body is correctly attached to the support portion, the vicinity of the connecting portion connected to the hook of the rope is oriented in the vertical direction and hangs down in the direction of gravity. By detecting whether or not the apparatus main body attached to the head is oriented in the vertical direction, it is possible to confirm whether the hook is attached or forgotten. Therefore, even when working at night, the work manager must accurately check the usage status of the safety belt by checking the display emitted by the display device provided for the safety belt attached by the worker. Can do.

  In addition, the device body including the first sensor and the display device is detachably attached to the rope by a fixture, and in a structure in which a sensor or the like is embedded in a hook or rope, or a cable is placed along the rope. Therefore, even if the safety belt check device breaks down during work, only the device main body can be easily replaced by the fixture.

  In the safety belt check device according to the present invention, it is preferable that the display device performs different operations depending on whether or not the orientation of the device body is in a normal state.

  In the present invention, the first sensor causes the display device to operate normally when the axial direction of the apparatus body, that is, the direction of the rope is in the normal state, and causes the display device to perform abnormal operation when the direction is not normal. it can.

  In the safety belt check device according to the present invention, it is more preferable that the display device behaves differently depending on whether the orientation of the device main body is continuously in a normal state for a predetermined time.

  In the present invention, when the movement of the rope that is less than the predetermined time, the display device does not operate, and the orientation of the device main body is continuously within a predetermined angle range for the set predetermined time, Since a predetermined operation can be performed by the display device, the usage state of the safety belt can be confirmed more accurately.

  Further, in the safety belt check device according to the present invention, the device body is provided with a second sensor for detecting the detected object arranged at a predetermined position of the belt, and the detected object is detected by the second sensor. In addition, the operation of the display device is preferably stopped.

  In the present invention, the display device does not operate when the detected object is detected by the second sensor, and the display device is effective when the detected object is not detected by the second sensor. Therefore, for example, when the hook is temporarily removed from the support portion and stored in the safety band storage unit, a detection object is provided in the safety band storage unit, and the detection object can be detected by the second sensor; As a result, the display device can be inactivated. When the hook is used, the display device can be validated by detaching the apparatus main body including the second sensor from the detection target and setting the second sensor in a non-detection state.

  In the safety belt check device according to the present invention, the second sensor may be a magnetic sensor, the detection target may be a magnet, and the magnet may be attached to the safety belt housing.

  In the present invention, the display device can be deactivated when the magnetism of the magnet provided in the safety belt storage unit is detected by the magnetic sensor of the apparatus main body. In addition, by using an iron material for the main body of the device, the main body of the device can be attracted and held by the magnet, and the main body of the device will not be detached from the magnet while the hook is stored in the safety band storage portion. The magnetism detection state can be maintained.

The safety belt check device according to the present invention includes a third sensor that detects a direction in which the hook faces, and a support member that is wound around the hook to attach the third sensor to the hook. The display device preferably operates differently based on detection results of both the third sensor and the first sensor.

  In the present invention, since the display device can be operated only when the correct direction of the hook and the correct direction of the rope coincide, the use state of the safety belt can be confirmed more accurately.

According to the safety belt check device of the present invention, when the axial direction of the device body detected by the first sensor, that is, the direction of the rope is in a normal state set in advance, the display device is operated in a normal state, and in an abnormal state. In some cases, the display device can be operated differently from the normal operation. Therefore, even when working at night, the work manager can accurately grasp the usage status of the safety belt by checking the display emitted by the display device provided for the safety belt attached by the worker. it can.
In addition, since the device body equipped with the first sensor and display device is detachably attached to the rope, even if the safety belt check device breaks down during work, only the device body is attached. It can be easily replaced by a tool, and it is not a configuration in which a sensor or a cable is incorporated in a hook or rope as in the prior art, and it is not necessary to replace the safety belt itself.

It is a figure which shows the use condition of the safety belt | band | zone provided with the safety belt check apparatus by embodiment of this invention. It is a perspective view which shows the structure of the check apparatus for safety belts shown in FIG. It is a perspective view which shows the attachment state of an apparatus main body. It is a perspective view which shows a partial structure of the check apparatus for safety belts attached to the rope side. It is a perspective view which shows the partial structure of the check apparatus for safety belts similarly attached to the rope side. It is a side view of the check device for safety belts attached to the rope side. It is a sectional side view of the check device for safety belts shown in FIG. It is the sectional view on the AA line shown in FIG. It is a figure which shows the attachment state of a hook, Comprising: (a) is a figure which shows a normal state, (b) is a figure which shows an abnormal state. It is a figure which shows the use condition of the check apparatus for safety belts by a modification.

Embodiments of a safety belt check device according to the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the safety belt check device 1 according to the present embodiment is configured to check whether the worker M is correctly using the safety belt 2 when working at a high place in, for example, railway work performed at night. Alternatively, it is used to confirm whether or not it is used correctly, and is used by attaching to a generally used safety belt.

First, the configuration of the safety belt 2 shown in FIGS. 1 and 2 employed in the present embodiment will be described.
The safety belt 2 is schematically composed of a hook 21 connected to a support portion 3 such as a single pipe of a work scaffold, a belt 22 worn by a worker M, and a rope 23 connecting the belt 22 and the hook 21. Has been. The belt 22 has a storage bag (not shown) for storing the hook 21 when not in use, and a D-shaped hook ring 25 (see FIG. 2) for temporarily hooking and storing the hook 21. It is provided at an arbitrary position. Here, the storage bag and the retaining ring 25 correspond to the “safety band storage portion” of the present invention.

Next, the configuration of the safety belt check device 1 will be described with reference to FIGS.
The safety belt check device 1 includes a device main body 11 that is integrally attached to the rope 23 of the safety belt 2, and an inclination sensor 12 that detects a predetermined axial direction (Y direction shown in the drawing) of the device main body 11 with reference to the vertical direction. (First sensor), a display unit 13 (display device) that operates differently depending on the detection result of the tilt sensor 12, and a surface on which the apparatus main body 11 is detachably attached so that its axial direction Y is parallel to the rope 23 It is generally configured from a fastener 14 (attachment). And the apparatus main body 11, the inclination sensor 12, and the display part 13 are provided integrally.
Further, in the safety belt check device 1 according to the present embodiment, the belt 22 is provided with an operation restricting member 15 for preventing the display unit 13 from being operated when the hook 21 is stored in the storage bag or the retaining ring 25. On the side.

The apparatus main body 11 is attached to a base end portion 23a in the vicinity of a connection portion between the rope 23 and the hook 21 in a certain direction. Specifically, the apparatus main body 11 accommodates the battery 16 and the above-described inclination sensor 12 inside, and includes display units 13 (light emitting display units 13A and buzzer generation units 13B described later) on both side end surfaces in the axial direction Y. A power switch 17 for power supply and a magnetic sensor 18 (see FIG. 7) for detecting a magnet piece 152 (described later) of the operation restricting member 15 shown in FIG. It is a substantially cylindrical frame extending in the direction Y). The apparatus main body 11 is made of an iron material and is attracted by the magnet piece 152 of the operation restricting member 15.
The power switch 17 is provided on the outer peripheral surface of the apparatus main body 11, and can turn on and off the power of the safety belt check apparatus 1 by the operation of the worker M shown in FIG.

  An angular velocity sensor such as an acceleration sensor or a gyro can be employed as the tilt sensor 12 accommodated in the apparatus main body 11. That is, the tilt sensor 12 detects the direction (tilt angle) of the apparatus body 11 itself, and the operation of the display unit 13 is selected according to the tilt angle. As will be described in detail later, the orientation of the apparatus main body 11 is detected when the orientation of the apparatus main body 11 in the axial direction Y is detected by the tilt sensor 12 and the axial direction Y is within a predetermined angle range that is angularly moved with reference to the vertical direction. Is set to a normal state, and a predetermined operation set in advance on the display unit 13 is performed. Similarly, when the axial direction Y is out of the angular range, the orientation of the apparatus main body 11 is set to an abnormal state. It is configured to perform different operations.

  The display unit 13 displays whether or not the orientation of the apparatus main body 11 is continuously in the normal state for a predetermined time, that is, after the time set based on the detection result of the tilt sensor 12 has elapsed. It has two functions: a light emitting display portion 13A that displays by turning on and blinking LEDs (light emitting diodes), and a buzzer generating portion 13B that generates a buzzer sound. The light emitting display portion 13A and the buzzer generating portion 13B are detachably attached to both end surfaces in the axial direction Y of the apparatus main body 11 via contact substrates 11a and 11b (see FIG. 7).

As shown in FIG. 7, the light-emitting display unit 13 </ b> A houses a light-emitting body 132 made of LEDs in a transparent case 131, and the light-emitting body 132 is turned on and blinks according to the detection result of the tilt sensor 12. . The light emitter 132 emits light in the direction of 360 ° around. The battery 16 in the apparatus main body 11 can be replaced by removing the transparent case 131 from the apparatus main body 11.
Further, the buzzer generating unit 13B houses the piezoelectric buzzer 134 in the case 133, and the piezoelectric buzzer 134 sounds according to the detection result of the tilt sensor 12 described above.

  The magnetic sensor 18 is for stopping the display unit 13 when magnetism is detected, and when the apparatus main body 11 is in contact with a magnet piece 152 of an operation restricting member 15 described later, the magnetic sensor 18. Has a function of blocking the contact circuit of the display unit 13 by magnetically reacting.

  As shown in FIGS. 3 to 4, the hook-and-loop fastener 14 has a belt shape and is attached to the opposite side of the apparatus main body 11 from the power switch 17. The hook-and-loop fastener 14 is provided so as to be wound around the rope 23. In this state, the apparatus main body 11 can be attached so that its axial direction Y is parallel to the rope 23.

As shown in FIG. 2, the operation restricting member 15 provided on the storage portion side of the safety belt 2 is attached to the storage bag or the retaining ring 25. Note that FIG. 2 shows an example of attachment to the retaining ring 25.
The operation restricting member 15 includes a support plate 151 curved along the peripheral shape of the apparatus main body 11 and a thin plate-like magnet piece 152 (detected body, magnet) attached to the inner peripheral surface 151a of the support plate 151. And a connecting string 153 fixed to the upper end of the support plate 151 and detachably connected to the retaining ring 25. The operation restricting member 15 can attract the apparatus main body 11 to the inner peripheral surface 151a by the magnet piece 152, and a magnet is detected by the magnetic sensor 18 (see FIG. 7) provided in the apparatus main body 11 at the time of the adsorption. The magnetic force of the piece 152 is detected, and the display unit 13 is stopped as described above. That is, when the hook 21 is stored in the retaining ring 25 when the safety belt 2 is not used, the device main body 11 is kept in contact with the magnet piece 152 of the operation restricting member 15 so as to be in a non-display state. Can do.
As described above, the apparatus main body 11 is made of an iron material so that the apparatus main body 11 can be attracted to and held by the magnet piece 152. Thus, the magnetic sensor 18 can maintain the magnetism detection state.

Next, the usage method and operation of the safety belt check device 1 configured as described above will be described with reference to the drawings.
As shown in FIGS. 1 and 2, when a worker performs a work at a high place at night, the power switch 17 is first turned on at the start of the work so that the safety belt check device 1 can be used. Then, the hook 21 is taken out from the storage bag or the retaining ring 25, the apparatus main body 11 is removed from the operation restricting member 15, and the hook 21 is attached to the support portion 3 such as a scaffold at a predetermined work location. When the apparatus main body 11 is removed from the operation restricting member 15, the magnetic sensor 18 does not detect the magnetism of the magnet piece 152 of the operation restricting member 15, thereby enabling the display unit 13.

  In the safety belt check device 1, as shown in FIGS. 3 and 7, an apparatus main body 11 in which a tilt sensor 12 and a display unit 13 (light emitting display unit 13A, buzzer generating unit 13B) are integrally provided is provided as an axis. By attaching the surface fastener 14 so that the direction Y is parallel to the rope 23 of the safety belt 2, the predetermined axial direction Y of the apparatus main body 11 can be detected by the inclination sensor 12 with respect to the vertical direction. The direction of the rope 23 at the position where the main body 11 is attached in parallel to the axial direction Y can be detected.

  Therefore, as shown in FIGS. 9A and 9B, when the axial direction Y of the apparatus main body 11 detected by the inclination sensor 12, that is, the direction of the rope 23 is within a predetermined angular range, the normal state R1 (FIG. 9 (a)), and setting the abnormal angle R2 (FIG. 9 (b)) when the angle is outside the predetermined angle range, the orientation of the apparatus main body 11 detected by the tilt sensor 12 is normal. The normal operation can be performed by the display unit 13 in the case of R1, and the abnormal operation different from the normal operation can be performed by the display unit 13 in the abnormal state R2.

For example, when in the normal state R1, the display is flashed at a constant interval by the light emitter 132 (FIG. 7) of the light emitting display unit 13A, and when in the abnormal state R2, the display different from the flashing is performed by the light emitter 132 of the light emitting display unit 13A. Or flashing the piezoelectric buzzer 134 (FIG. 7) of the buzzer generator 13B.
In the axial direction Y of the apparatus main body 11 detected by the inclination sensor 12, the normal state R1 can be set, for example, in a range where the inclination angle from the horizontal direction to the downward direction exceeds 30 °, and the abnormal state R2 Can be set, for example, in a range in which the inclination angle from the horizontal direction to the upward direction exceeds 30 °.

In the safety belt check device 1, the display unit 13 is configured to perform different operations depending on whether the orientation of the device body 11 is continuously normal for a predetermined time. For the movement of the rope 23 that is less than the predetermined value, the display unit 13 does not operate and the display unit 13 determines whether the direction of the apparatus main body 11 is continuously within the angle range for a set predetermined time. Can be operated.
For example, when the above-described normal state continues for 10 seconds, the normal operation set on the display unit 13, that is, the light emitter 132 of the light emitting display unit 13A continues to blink at regular intervals. When the abnormal state described above continues for 30 seconds, the abnormal operation set on the display unit 13, that is, the light emitter 132 of the light emitting display unit 13A flashes and flashes, and the piezoelectric buzzer 134 of the buzzer generating unit 13B continues. Keeps ringing.

  Further, in the safety belt check device 1, the device body 11 is provided with a magnetic sensor 18 that detects the magnet piece 152 of the operation restricting member 15 disposed at a predetermined position of the belt 22. Since the operation of the display unit 13 is stopped when the piece 152 is detected, when the hook 21 is temporarily detached from the support unit 3 and stored in the safety band storage unit such as the hook ring 25, By providing the operation restricting member 15 including the magnet piece 152 on the retaining ring 25 and making the magnet piece 152 detectable by the magnetic sensor 18, the display unit 13 can be inactivated. Become. And when using the hook 21, the apparatus main body 11 provided with the magnetic sensor 18 is removed from the magnet piece 152, and the display part 13 can be validated by making the magnetic sensor 18 into a non-detection state.

With such a configuration, the work manager can confirm the display emitted by the display unit 13 provided in the safety belt 2 attached by the worker M (see FIG. 1) even when working at night. Thus, the usage state of the safety belt 2 can be accurately grasped.
That is, when the hook 21 of the safety body 2 is correctly attached to the support portion 3, the vicinity of the connecting portion connected to the hook 21 of the rope 23 faces in the vertical direction and hangs down in the direction of gravity. 1, by detecting whether or not the device main body 11 attached in parallel to the rope 23 is oriented in the vertical direction, it is possible to confirm whether the hook 21 is attached or forgotten to be attached.

In the safety belt check device according to the present embodiment described above, when the axial direction Y of the device main body 11 detected by the tilt sensor 12, that is, the direction of the rope 23 is in a preset normal state, the display unit 13 performs normal operation. In the abnormal state, the display unit 13 can be operated differently from the normal operation. Therefore, even when working at night, the work manager can accurately grasp the usage state of the safety belt 2 by checking the display emitted by the display unit 13 provided for the safety belt 2 attached by the worker. can do.
Moreover, since the apparatus main body 11 provided with the inclination sensor 12 and the display part 13 is provided so that attachment or detachment is possible with respect to the rope 23, even if it is a case where the check apparatus 1 for safety belts fails during an operation | work, apparatus Only the main body 11 can be easily replaced by the hook-and-loop fastener 14, and it is not a configuration in which a sensor or a cable is incorporated in a hook or rope as in the prior art, and it is not necessary to replace the safety belt itself. The effect is excellent.

As mentioned above, although embodiment of the check device for safety belts by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the present embodiment, the apparatus main body 11 in which the inclination sensor 12 and the display unit 13 are integrally provided is attached to the rope 23, and the direction of the apparatus main body 11 and the rope 23 is detected by the inclination sensor 12. It is not limited to such a configuration. For example, the safety belt check device shown in FIG. 10 is another example (modified example). In the safety belt check device according to this modification, a hook-side inclination sensor 19 (third sensor) for detecting the direction of the hook 21 is provided on the hook 21 via a support member 19 a, and the hook-side inclination sensor 19 and the rope 23 are provided. The display unit 13 (13A, 13B) behaves differently depending on whether or not the axial directions Y and Z of the inclination sensor 12 (first sensor) provided in the apparatus main body 11 to be attached are oriented in the vertical direction. It has become. At this time, the hook-side inclination sensor 19 is attached to the hook 21 at a position with little interference when the hook 21 is attached or detached. The hook side inclination sensor 19 is connected to the apparatus main body 11 by a cable (not shown), and the detection value of the hook side inclination sensor 19 can be sent to the apparatus main body 11. As described above, in the present modification, the display unit 13 can be operated only when the correct orientation of the hook 21 and the correct orientation of the rope 23 coincide with each other. Can be confirmed.

Further, as the display device, the light emitting display unit 13A using the light emitter 132 and the buzzer generating unit 13B including the piezoelectric buzzer 134 are employed in the present embodiment, but the present invention is not limited to these configurations. . That is, the display method of the volume, sound quality, color, generation interval (time), etc. of the alarm sound generated by the display device can be changed as appropriate.
Further, the configuration of the apparatus main body 11, the fixture of the apparatus main body 11, the operation restriction member 15, and the like are not particularly limited and can be set as appropriate. For example, the operation restricting member 15 can be omitted, and the apparatus main body 11 does not have to be cylindrical. However, the configuration of the present invention attached in parallel to the rope 23 may be long in the axial direction Y. preferable. And the battery 16 accommodated in the apparatus main body 11 may be any kind, such as AA and AAA, and is not particularly limited.

DESCRIPTION OF SYMBOLS 1 Safety belt check apparatus 2 Safety belt 3 Support part 11 Apparatus main body 12 Inclination sensor (1st sensor)
13 Display unit (display device)
13A Light emitting display part 13B Buzzer generating part 14 Surface fastener (attachment)
15 Operation restriction member 152 Magnet piece (detected body, magnet)
18 Magnetic sensor (second sensor)
19 Hook-side tilt sensor (third sensor)
21 Hook 22 Belt 23 Rope 23a Base 25 Lock ring (safety belt storage)
M Worker Y Axial direction of the device body

Claims (7)

A safety belt that is provided on a safety belt composed of a hook that is detachably connected to the support portion, a belt that is worn by an operator, and a rope that connects the belt and the hook, and that checks the mounting state of the hook. A belt check device,
The device body;
A first sensor that detects a predetermined axial direction of the apparatus body with respect to a vertical direction;
A display device that operates differently depending on the detection result of the first sensor;
A fitting for removably attaching the device body to the rope by winding the rope so that a predetermined axial direction of the device body is parallel to the rope ;
Consisting of
The safety belt check device, wherein the first sensor and the display device are integrally provided in the device main body.   The safety belt check according to claim 1, wherein when the axial direction of the device main body is within a predetermined angle range that is angularly moved with respect to a vertical direction, the orientation of the device main body is set to a normal state. apparatus.   3. The safety belt check device according to claim 2, wherein the display device performs different operations depending on whether or not the orientation of the device body is in a normal state.   4. The safety belt check device according to claim 2, wherein the display device performs different operations depending on whether or not the orientation of the device main body is continuously in the normal state for a predetermined time. . The apparatus main body is provided with a second sensor for detecting a detection object disposed at a predetermined position of the belt,
5. The safety belt check device according to claim 1, wherein the operation of the display device is stopped when the second object is detected by the second sensor. 6.   The safety belt check device according to claim 5, wherein the second sensor is a magnetic sensor, the detected object is a magnet, and the magnet is attached to a safety belt housing portion. A third sensor for detecting a direction in which the hook faces ;
A support member for attaching the third sensor to the hook by being wound around the hook,
The safety band check device according to any one of claims 1 to 6 , wherein the display device performs different operations based on detection results of both the third sensor and the first sensor.

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