KR100403474B1 - Device for alerting change point of time of rope for safety device - Google Patents

Abstract

The present invention relates to a rope replacement timing alarm device for warning the replacement time by predicting the life of the safety belt to prevent the fall while working in a high place.

The present invention is to detect the cutting or broken state of the rope of the safety belt used in the workplace of the high place, in order to alert the replacement time of the safety rope rope replacement time, twisted together with the rope and the rope is safe A control unit that detects a cutting state of the wire twisted on the rope, a wire that is installed to detect a sag over a range, a control unit which receives a cutting state detection signal from the detection unit, and outputs an alarm control signal; An oscillator for outputting a lamp flashing control signal according to an alarm control signal output from the controller, a display unit for receiving a lamp flashing control signal from the oscillator and flashing the lamp, and a buzzer for receiving an alarm control signal from the controller and generating an alarm sound. It is characterized by.

Description

DEEPICE FOR ALERTING CHANGE POINT OF TIME OF ROPE FOR SAFETY DEVICE}

The present invention relates to a rope replacement time alarm device of the harness, and more particularly to a rope replacement time alarm device for warning the replacement time in anticipation of the life of the harness to prevent the fall during work in a high place.

In general, the safety belts used in the industrial field are belt type and safety swing type, which ranges from 1 to 5 types depending on the grade, and depending on the use type, U-hook only, 1-hook only, 1-hook and U-hook common, It is divided into safety block and fall prevention. However, safety belts are used at work sites where there is a risk of falling from working at heights of construction sites, handrails, and power poles.

This conventional harness causes the risk of falling when the rope fixed to the seatbelt is broken, despite the fact that the rope is extended because it is checked and used to visually cut and break to prevent the risk of falling. And it was difficult to identify with the naked eye, there was a problem that a safety accident occurs because the rope is cut off.

Accordingly, an object of the present invention is to provide a rope replacement time alarm device for alarming the replacement time by detecting a cutting or broken state of the rope used in the work place in a high place to solve the above problems. .

1 is an external view of a safety belt according to an embodiment of the present invention

Figure 2 is a block diagram of a safety belt rope replacement time alarm device according to an embodiment of the present invention

3 is a detailed circuit diagram of FIG. 2 according to an embodiment of the present invention.

4 is an operation waveform diagram of the oscillator 26 according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: seat belt 12: fixing part

14: rope 16: wire

18: linkage 20: detector

22: amplifier 24: controller

26: oscillation unit 28: display unit

30: buzzer

In the rope replacement time alarm device of the safety belt of the present invention for achieving the above object, the wire is twisted together with the rope and installed to detect the rope is stretched over the safety range, and the cutting of the wire twisted on the rope A detection unit for detecting a state, a control unit for receiving a cutting state detection signal from the detection unit, and outputting an alarm control signal, an oscillator for outputting a lamp blinking control signal according to the alarm control signal output from the control unit, and the oscillation unit from the And a display unit for blinking a lamp in response to a lamp blinking control signal and a buzzer for generating an alarm sound upon receiving an alarm control signal from the controller.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is an external view of a safety belt according to an embodiment of the present invention.

Safety belt 10 for wearing on the body of the worker, a fixing part 12 for fixing the rope 14 on the seat belt 10, and is connected to the fixing part 12 to the fall of the worker Rope 14 to be prevented, and is connected to the end of the rope 14 is composed of a connecting ring 18 for fixing to the fixing portion 12 or the support installed in the workplace. The rope 14 is made by twisting together with the wire 16 at the time of manufacture and the number of twisting of the wire 16 is less. The number of twists of the wires 16 is reduced so that the wires 16 are cut first when the rope 16 is stretched by a predetermined range or more. Both sides of the seat belt 10 are attached to the first and second lamps (LED1, LED2) for informing the replacement time of the rope 14, the buzzer (30) on the right side of the first lamp (LED1) Is attached.

Figure 2 is a block diagram of a safety belt rope replacement time warning device according to an embodiment of the present invention.

One line of the wire 14 twisted together with the wire 16 and fixed to a support to prevent a worker from falling, and the wire 16 twisted on the rope 14 may be connected to the battery BA1. The other line is connected to the ground, and when the wire 16 is disconnected, no current flows, so that the sensing unit 20 detects a cutting state of the rope 14 and a wire twisted in the rope 16. One line 16 is connected to the battery BA1 of the sensing unit 20 and the other line is connected to the ground of the sensing unit 20. An amplifier 22 for amplifying the signal detected by the detector 20 to a predetermined level, a controller 24 for receiving an amplified signal from the amplifier 22 and outputting an alarm control signal, and the controller ( An oscillator 26 for outputting a lamp flashing control signal according to the alarm control signal outputted from 24), and a display unit 28 for indicating a replacement time of the rope by receiving a lamp blinking control signal from the oscillator 26 to flash the lamp; And a buzzer 30 that receives an alarm control signal from the control unit 24 and generates an alarm sound. The upper side line of the wire 14 is a line to which power is supplied from the battery of the sensing unit 20, and the lower side line of the wire 14 is a line connected to the ground of the sensing unit 20.

3 is a detailed circuit diagram of FIG. 2 according to an embodiment of the present invention.

The rope 14 is such that the electric wires 16 are twisted together and a current flows through the electric wires 16. The sensing unit 20 detects a disconnection state of the wire 16 by switching a resistor R1 for supplying power to the wire 16 from the battery BA1 and when the wire 16 is disconnected. A transistor Q1, the amplifier 22 having a collector of the transistor Q1 connected to a base, and having an emitter grounded to amplify the disconnection state detection signal outputted from the transistor Q1 ( It consists of Q2). The control unit 24 is connected to both ends of the diode (D1) coil (L1), the common terminal (COM) and the normal open terminal (NO) is connected in accordance with the current flow of the coil (L1), the current to the coil It is composed of a relay (RY1) consisting of the first and second switches (SW1, SW2) for switching selection so that the common terminal (COM) and the normal cross (NC) terminal is connected when not flowing. The buzzer 30 is connected to the common terminal COM of the second switch SW2, and when the common terminal COM is connected to the normal open terminal NC of the relay RY1, power is supplied to generate an alarm sound. The display unit 28 is composed of first and second lamps LED1 and LED2 connected to the battery BA1, respectively, connected to the common terminal COM of the first switch SW1 of the relay RY1. The oscillator 26 has a resistor R2 connected to the first lamp LED1 connected to the collector of the transistor Q3, and an emitter of the transistor Q3 being grounded, and the collector of the transistor Q3. A capacitor C1 connected to the base of the transistor Q4, a common terminal COM of the first switch SW1 of the relay RY1, and a connection of the capacitor C1 and the base of the transistor Q4. The resistor R3 connected to the node, the resistor R5 connected to the second lamp LED2 and connected to the collector of the transistor Q4, and the emitter of the transistor Q4 are grounded, and the transistor ( The capacitor C2 connected to the collector of Q4 and connected to the base of the transistor Q3, the common terminal COM of the second switch SW1 of the relay RY1, the capacitor C2, and the transistor Q3. It consists of a resistor (R10) connected to the connection node of. The battery BA1 supplies a power supply (for example, 9V) to the device for detecting the cutting state of the rope 14 of the present invention and for alarming the replacement timing of the rope 14.

4 is an operation waveform diagram of the oscillator 26 according to an exemplary embodiment of the present invention.

1 to 4, the operation of the preferred embodiment of the present invention will be described in detail.

First, when the user wears the safety belt as shown in FIG. 1, current flows from the battery BA1 to the wire 16 through the resistor R1. As a result, a low potential is applied to the base of the transistor Q1, and the transistor Q1 is turned off. When the transistor Q1 is turned off, no current flows through the base of the transistor Q2, and the transistor Q2 is turned off. When the transistor Q2 is turned off, no current flows through the coil L1 of the relay RY1, so that the common terminal COM of the first and second switches SW1 and SW2 is connected to the normal cross terminal NC. Since the buzzer 30 and the oscillator 28 do not operate.

However, when the rope 14 is stretched and used while connecting the rope 14 to the support of the work site, the sensing unit 20 detects this when the wire 14 wound on the rope 14 is disconnected. That is, power supplied from the battery BA1 flows to the wire 14 through the resistor R1, and when the wire 16 is disconnected, no current flows and is applied to the base of the transistor Q1. As a result, the transistor Q1 is turned on. When the transistor Q1 is turned on, a current flows in the transistor Q2, and the transistor Q2 amplifies. When the NPN type explains the amplifying action of the transistor Q2, nothing is connected to the base, the negative voltage of the power source is connected to the emitter, and the positive voltage of the power source is applied to the collector. At this time, if the load resistance of the collector is Rc, the electrons of the collector and the holes of the base apply a reverse voltage to the PN junction, so the current hardly flows. Next, when the + voltage is connected to the base through the load resistor Rb, the electron of the emitter jumps over the potential barrier of the base and the emitter by the + voltage of the base, and the base current Ib flows because the base starts to move toward the hole. However, since the base is made extremely thin at the junction of the transistor Q2, the electrons of the emitter start to move by the + voltage of the emitter electrons and the collector together, and the current flows between the emitter and the collector. Current Ic flows. Also, because the base is so thin, the number of holes in the base is so small that the electrons in the emitter are overwhelmingly moving toward the collector's + voltage rather than toward the base. For this reason, the base current Ib modal has a large collector current Ic and reaches about 10 to 200 times. The ratio of the collector current Ic and the base current Ib can be expressed by the same equation as that of the current amplification factor.]

In other words, a large collector current can be obtained with a slight base current. It is also possible to increase or decrease the magnitude of the collector current by changing the base current.

When the amplification action of the transistor Q2 is performed in this way, the power supplied from the battery BA1 flows to the ground through the collector and emitter of the transistor Q2 through the coil L1 of the relay RY1, and the relay RY1. ) Is connected to the common terminal COM and the normal open terminal NO of the first and second switches SW1 and SW2. Accordingly, power supplied from the battery BA1 is supplied to the buzzer 30, the oscillator 26, and the display unit 16. The oscillator 26 operates as a square wave oscillator as an unstable multivibrator. When power is supplied to the oscillator 26, at the time t = 0 as shown in FIG. 4A, the capacitor C2 begins to be charged by the time constants of the resistor R4 and the capacitor C2, and the resistors R3 and Due to the time constant by the capacitor C1, the capacitor C1 starts to discharge as shown in FIG. 4B, so that the transistor Q3 is turned off and the transistor Q4 is turned on. At this time, the first lamp LED1 is turned off and the second lamp LED2 is turned on.

When the capacitor C2 starts charging and reaches 0V at -Vcc, the capacitor C2 starts to discharge as shown in FIG. 4C, and the capacitor C1 starts to discharge and when -Vcc is reached at 0V, as shown in FIG. 4D. The transistor Q3 is turned on and the transistor Q4 is turned off since the discharge starts together. At this time, the first lamp LED1 is turned on and the second lamp LED2 is turned off. This operation causes the first and second lamps LED1 and LED2 to alternately flash periodically due to the visibility determined by the resistor R4 and the capacitor C2 and the resistor R3 and the capacitor C1. Each of these time constants determines a delay time and the values do not have to be equal to each other, and the oscillation frequency F can be expressed by Equation 2 below.

Therefore, the first and second lamps LED1 and LED2 installed on the left and right sides of the belt of the safety belt alternately flash to inform the worker when to replace the rope 14.

At the same time, when the common terminal COM and the normal open terminal NO of the second switch SW2 of the relay RY1 are connected, the buzzer 30 attached to the seat belt 10 generates an alarm sound to the operator. Informs when to replace the rope (14).

As described above, the present invention allows the wire wound on the rope to be disconnected when the rope of the safety belt is extended beyond the safety range, thereby detecting the disconnection of the wire and thus warning the replacement time of the rope to prevent personal accident and economic loss due to the fall. The benefits are effective.

Claims (3)

In the rope replacement timing alarm of the harness, A wire twisted with a rope and installed to judge when the rope extends beyond a safe range; Detecting unit for detecting the cutting state of the wire twisted in the rope, A control unit which receives the cutting state detection signal from the detection unit and outputs an alarm control signal; An oscillator for outputting a lamp blinking control signal by an alarm control signal output from the controller; Rope replacement time alarm device of the safety belt, characterized in that consisting of a plurality of lamps flashing by the lamp flashing control signal from the oscillation unit to indicate the replacement time of the rope. The method of claim 1, And a buzzer for receiving an alarm control signal from the controller to generate an alarm sound. The method of claim 2, The control unit is a rope replacement time alarm device, characterized in that configured as a relay.