JPH0319893Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an invention for improving safety belts used by workers at heights to prevent falls and for work, and in particular, an invention for a device that issues an alarm when the connection between the hook and the ring is incomplete. It is.

Conventionally, this type of safety belt was worn on the body, and the rope 13 was passed around a telephone pole or steel tower, and the hook 14 attached to the end of the rope was connected to the ring 4 to perform work at high places. During work, depending on the working conditions, people may accidentally fail to hook the hook 14 due to frequent operation of hook 14, or the hook 14 may get caught in clothes, etc., or fall accidents may occur due to human illusions, etc. It was a contributing factor to this occurrence.

In order to prevent fall accidents caused by such illusions or psychological factors unique to humans, the present invention aims to provide a device that issues an alarm to notify the operator if the hook is not fully engaged with the ring. This is the purpose.

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

As shown in the figure, in this embodiment, two small rings 41 and 42, which are approximately D-shaped, are used as terminals 1 and 2, facing each other, and polymerized and bonded through an insulating material 3 such as synthetic resin or rubber to form a ring 4. A switch circuit 5 includes two transistors, a resistor, a capacitor, etc., a control circuit 6 includes an IC, a resistor, a capacitor, etc., and an alarm circuit 7 includes a buzzer 20, a lamp 21, a resistor, etc. It has a structure in which an alarm device 11 is attached to a safety belt 12 in which an electronic circuit 8 is formed, and electrodes 9 and 10 of the electronic circuit 8 are electrically connected to the terminals 1 and 2 using lead wires 15 and 16, respectively. It is something.

The ring 4 is attached to one end of the body support belt 17 of the safety belt 12 by sewing it using a complementary belt or the like.
The electronic circuit 8 is stored in a predetermined case and attached to the safety belt 12.
Attach it to the body support belt 17 or outer tightening belt 18.

Workers working in high places attach this safety belt 12 to their waist and climb to high places such as utility poles and steel towers to perform work. 14 is engaged with the ring 4 and the switch 19 of the alarm device 11 is turned on, the terminals 1 and 2 consisting of both small rings 41 and 42 of the ring 4 connected to the electrodes 9 and 10 are connected to the hook 14 engaged therewith. Since the voltage in the electronic circuit 8 is applied to the base of the first transistor 51 of the switch circuit 5, and the current flows from the collector to the emitter, the base side of the second transistor 52 is negative. Since the state is maintained, the circuit after that will not work. When the hook 14 is removed from the ring 4 or when it is not fully engaged, both terminals 1 and 2, that is, the electrodes 9 and 10 are cut off, so that voltage is applied to the base of the second transistor 52 and its collector. A control circuit 6 consisting of an IC or the like connected to the alarm circuit 7 is activated, and the buzzer 20 and lamp 21 of the alarm circuit 7 are activated to give a warning to the worker.
Since the control circuit 6 is equipped with a timer function,
As a result, the buzzer 20 and lamp 21 intermittently sound or light up. The time adjustment is performed using a variable resistor. When the hook 14 is engaged with the ring 4 again, both terminals 1 and 2 are short-circuited, so that the base of the first transistor 51 is biased as before, and the buzzer 20 stops sounding and the lamp 21 also goes out. That is, if the hook 14 is not engaged with the ring 4 or if the hook 14 is not fully engaged because it is biting into clothing, a buzzer or a lamp or both will sound an alarm to warn of danger. Since the switch circuit 5 is provided with a capacitor, even if the hook 14 is engaged with the ring 4 and both terminals 1 and 2 are temporarily cut off, the first transistor is connected to the switch circuit 5 for a short time. 51, that is, a delay circuit causes the alarm to be generated with a slight delay, thereby eliminating the discomfort caused by unnecessary alarm sounds during use.
The insulator 3 interposed between both the small rings 41 and 42 of the ring 4 has both small rings 41 and 42 on the outer peripheral side.
It is preferable to make it protrude slightly from 42 in order to prevent the movement when it comes into contact with a hook or other metal object.

The present invention is constructed as described above, and when the hook 14 and the ring 4 are connected normally and securely in the state of use for high-altitude work, the no-alarm state is maintained, and the hook 14 and the ring 4 are connected properly. If the connection is incomplete, notify the operator by a buzzer or lamp, call for attention, and eliminate the situation without a net.
It has a remarkable effect in preventing fall accidents.

In the description of the above embodiment, a configuration was described in which an alarm is issued when both terminals 1 and 2 are cut off, but conversely, an alarm may be issued when both terminals 1 and 2 are short-circuited. In that case the second
The transistor 52 may be removed and the control circuit 6 may be brought into contact with the first transistor 51.

Further, when generating continuous alarms, it is preferable to omit the control circuit 6 and connect the alarm circuit 7 to the second transistor of the switch circuit 5.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a safety belt equipped with the alarm device 11 of the present invention, Fig. 2 is a conceptual diagram of the present invention, and Fig. 3 is a cross-sectional view taken along the line X-X of Fig. 2 connected to a ring. Figure 4 is a partial cross-sectional view of the hook engaged with the ring, Figure 5 is a cross-sectional view taken along line X-X in Figure 2.
Another embodiment is shown in a cross-sectional view along the line. Codes in the figure: 1 and 2 are terminals, 3 is an insulator, 4 is a ring, 41 and 42 are small rings, 5 is a switch circuit, 6 is a control circuit, 7 is an alarm circuit, 8 is an electronic circuit, 9 and 10 is an electrode, 11 is an alarm device, 12 is a safety belt, 13 is a rope, 14 is a hook, 15, 16
is a lead wire, 17 is a body support belt, 18 is an external fastening belt, 19 is a switch, 20 is a buzzer, 21 is a lamp, and 51 and 52 are transistors.

Claims (1)

[Claims for Utility Model Registration] 1. Two terminals 1 insulated from each other in a ring 4,
2, the switch circuit 5, the control circuit 6, and the alarm circuit 7 are combined to form an electronic circuit 8, and the electrodes 9, 10 of the electronic circuit 8 are connected to the terminals 1, 2, respectively.
and connect the terminals 1 and 2 to the hook 1.
A safety belt equipped with an alarm device characterized by a structure in which an alarm device 11 that issues an alarm when cut off or short-circuited at a safety belt 12 is attached to the safety belt 12. 2 Ring 4 is made by polymerizing and bonding two small rings 41 and 42 through insulator 3, and connecting one small ring 41 to one terminal 1 and the other small ring 42.
A safety belt equipped with an alarm device according to claim 1, which is characterized by a structure in which the other terminal 2 is the other terminal 2. 3 The ring 4 is made by polymerizing and bonding the inner ring 43 and the outer ring 44 through the insulator 3.
Connect one terminal 1 and the outer ring 44 to the other terminal 2.
A safety belt equipped with an alarm device according to claim 1 of the utility model registration claim, characterized by a structure as follows. 4 Connect terminals 1 and 2 to the switch circuit 5 of the electronic circuit 8.
Utility model registration claim 1, characterized in that a delay circuit is provided so that when the hook 14 interrupts or short-circuits, a delay circuit is provided to issue a warning after a time delay.
A safety belt equipped with an alarm device according to paragraph 2, paragraph 2 or paragraph 3. 5. The utility model according to claim 1, 2, 3, or 4, characterized in that the control circuit 6 of the electronic circuit 8 is equipped with a timer function to generate an alarm intermittently. Safety belt with alarm device. 6. The ring 4 is characterized by a structure in which it is attached to one end of the body support belt 17 of the safety belt 12 as described in claim 1, 2, 3, 4, or 5 of the utility model registration claim. Safety belt with alarm device.