JPH0226515Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is mainly related to safety belts used when working on steel towers and other steel structures, especially when the ropes and hooks of the safety belt are not securely connected to the members of the steel tower. This relates to a safety belt equipped with an alarm device that issues an alarm to notify the worker or other managers.

When working at heights of 2 meters or more, various safety belts or safety devices, including pole-mounted safety belts, are used to prevent falls. However, due to familiarity with work, human illusions and forgetfulness, people sometimes work or move without securely connecting the ropes and hooks of safety belts to structures such as steel tower members, and sometimes they are unable to use them. Because of the hassle, work was sometimes carried out without ropes, and many accidents occurred during these unprotected conditions.

In view of the current situation, the present invention is a safety belt equipped with a device that issues an alarm to notify the worker or site manager when the rope or hook of the safety belt is not securely connected to a structure such as a steel tower. Its purpose is to provide.

Aspects of the present invention will now be described in detail with reference to an embodiment illustrated in the accompanying drawings.

In this embodiment, an alarm device 7 comprising an electronic circuit 6 that stops the action of the alarm circuit 5 by short-circuiting the electrodes 1 and 2, and when the electrodes 1 and 2 are cut off, the alarm circuit 5 operates and issues an alarm. The alarm device 7 includes a switch circuit 3 made of one or more transistors, a control circuit 4 made of an IC that is activated by opening and closing of the switch circuit, and an alarm circuit 5 that issues an alarm by the action of this control circuit. An electronic circuit 6 consisting of several resistors, capacitors, switches, power supplies, and other parts is housed in a case, and a belt loop or magic fastener is provided so that it can be attached to a safety belt 8.

The safety belt 8 consists of a body support belt 11 having rings 9 and 10 at both ends, an outer tightening belt 13 with a buckle 12 attached to one end, and a hook 15 attached to the tip of a rope 14 made of twisted conductive fibers. A so-called pillar-mounted safety belt is used as an example, in which a telescopic adjuster 16 is provided in the middle portion, and the telescopic adjuster 16 is detachably connected to one ring 9.

One electrode 1 of the alarm device 7 is electrically connected to the ring 10 of the safety belt 8 with an electric wire or a cloth or belt woven with conductive fibers, and the other electrode 2 is connected with conductive clothing or conductive fibers. By electrically connecting to a conductive member 17 such as a woven fabric or belt, and wearing the ring-shaped part 18 of the conductive member 17 on the foot, and wearing conductive shoes (not shown) over it, the conductive material can be made conductive. The member 17 and the conductive shoe can be electrically connected.

In this way, the worker attaches the safety belt 8 to his body and climbs up to a high place such as a steel tower to perform work. During the work, he passes the rope 14 around the tower member and attaches the hook 15 to the safety belt. Work at high places is carried out while engaging the ring 10 of 8 and holding the body by these safety bodies. In this case, one electrode 1 of the alarm device 7 is connected to a steel tower member from a ring 10 through a hook 15 and a rope 14. At this time, the other electrode 2 is also electrically connected to the tower member through the conductive member 17 and the conductive shoe. In other words, since both electrodes 1 and 2 are in a short-circuited state,
A bias is applied to the base of the transistor in switch circuit 3, and current flows between the collector and emitter. At this time, the input side of the control circuit 4 connected to the collector side of the transistor becomes a negative state, so the electronic circuits do not operate after that, and therefore the alarm circuit 5 such as the buzzer or lamp stops. There is.

When the worker removes the hook 15 from the ring 10 when changing the working position or moving, both electrodes 1,
2 is in a cut-off state, and no current flows through the transistor of switch circuit 3, so the control circuit 4
Since the IC input side becomes positive, the control circuit operates and the alarm circuit 5's buzzer or LED intermittently sounds or lights up to notify the operator of danger.

The present invention is used in this way, and if the hook 15 or rope 14 completely connects the steel tower member and the safety belt 8 to ensure safety, the work can be carried out without issuing an alarm from the alarm device 7. This allows people to work at heights with peace of mind. In addition, if the hook 15 or rope 14 is not connected to the steel tower member, that is, if it becomes unprotected, the alarm device 7 will activate and issue a warning such as a buzzer to notify the worker, so the worker can immediately take safe measures. can. Therefore, I forgot to attach the safety belt rope or hook,
It is possible to protect workers from the risk of falling by eliminating defenseless situations caused by mis-latching or incorrect hooking.

When the alarm device 7 of the present invention is used, the steel tower is used as one of the conductive means, so the safety belt 8 is always connected to the steel tower member, and the alarm device operates in that relationship. Therefore, there are remarkable effects such as safety without the occurrence of a no-tether condition due to erroneous operation.

FIG. 4 is a block diagram of an electronic circuit showing a second embodiment of the present invention, in which an alarm circuit 5 is equipped with an alarm device 51 such as a buzzer or LED that issues an alarm, and a transmitter 52 that is linked to the alarm device 51. The radio waves sent from the antenna through the antenna 53 are sent to the antenna 5 on the receiving side.
4, a receiver 55 receives the information, and immediately activates an alarm 56 such as a buzzer or LED to notify the site manager at another location.

That is, the transmitter 52 side is attached to the safety belt 8 worn by high-place workers, the receiver 55 side is installed at the field office on the ground, and the electrodes 1,
2 is released, that is, when it becomes defenseless, the alarm 51 notifies the worker, and at the same time, the transmitter 52 sends this information to the ground, activates the alarm 56 on the receiver 55 side, and alerts the worker. Workers and managers can work together to prevent fall accidents, such as notifying the manager and, if the situation continues unprotected for a long time, having the manager warn the worker in some way, further increasing safety. can be ensured. If there are multiple workers, each worker can be managed and supervised by changing the transmission frequency for each worker.

FIG. 5 shows a third embodiment of the present invention, in which two rings 10, 10 are attached to the right side of the safety belt 8, and a rope 19 having conductivity different from the rope 14 is attached to one of the rings 10, 10. By attaching a hook 20 to the tip of the rope 19 and connecting the rope 14 or hook 15 and this rope 19 or hook 20 alternately to the steel tower member, the defenseless state can be completely protected even when moving. Although this embodiment differs from the first embodiment in that prevention is provided, the other functions and effects are the same.

[Brief explanation of the drawing]

Figure 1 is a plan view of the safety belt of the present invention, Figure 2 is a conceptual diagram of the alarm, Figure 3 is its circuit diagram, and Figure 4 is a conceptual diagram of the alarm showing the second embodiment of the invention. , 5th
The figure is a plan view of a safety belt showing a third embodiment of the present invention. In the figure, symbols 1 and 2 are electrodes, 3 is a switch circuit,
4 is a control circuit, 5 is an alarm circuit, 6 is an electronic circuit, 7
is an alarm circuit, 8 is a safety belt, 9 and 10 are rings, 1
1 is a belt, 12 is a buckle, 13 is an external tightening belt, 14 and 19 are ropes, 15 and 20 are hooks,
16 is a telescopic adjuster, 17 is a conductive member, and 18 is a ring-shaped portion.

Claims (1)

[Claims for Utility Model Registration] 1. An alarm device comprising an electronic circuit that stops the action of an alarm circuit by short-circuiting both electrodes, and when the two electrodes are cut off, the alarm circuit operates and issues an alarm. One electrode of the alarm device is electrically connected to the ring of the safety belt, the other electrode is connected to a conductive material such as conductive clothing or conductive fiber, and then electrically connected to the steel tower member via conductive shoes. A structure is provided in which the alarm action of the alarm device is controlled by connecting to the ring, connecting a rope/belt or hook, etc. mixed with a conductive member to the ring, and attaching/detaching the hook/rope/belt to the steel tower member. A safety belt with a distinctive warning device. 2 Claim No. 1 for utility model registration characterized by the use of a buzzer or lamp as an alarm circuit
Safety harness equipped with an alarm device as described in Section 1. 3. A safety belt equipped with an alarm device according to claim 1 of the utility model registration claim, which uses a radio transmitter and a receiver as an alarm circuit, and is characterized by a structure in which a buzzer and a lamp are provided.