JP6427804B2 - Master rope with signal line and safety belt hook detection device using the same - Google Patents

Description

The present invention relates to a master rope with a signal line and a device for detecting hooking of a safety belt for preventing falling during work at high places using the same.

As an example of a detection device that detects a state where a hook attached to a rope (lanyard) tip of a safety belt is hung on a master rope or other solid support and issues an alarm in case of inconvenience, Patent Document 1 discloses a patent. Reference 2 can be seen.
In Patent Document 1, whether the hook is hooked or not is detected by pressing a switch of the second sensor (use state detection sensor) in paragraphs 0008 and 0009. This is a switch that moves by being pressed by the object to be hung, and is described as a non-use switch. When this piece is moved by being pressed by the object to be hung, the electrical switch that arrives at the root is driven. It is what is done. The hook itself must be extremely sturdy from the beginning. In addition, since the contact with the master rope changes from time to time, the sense signal is unstable, and it is easy to be damaged by repeated stress of contact. In addition, the sense signal wiring is complicated such as passing through a hook configured as a tube, and there are many drawbacks such as requiring hook strength and weight.
In Patent Document 2, a coil is placed in a hook, a magnetic material is provided on the parent rope side, and whether or not the hook is hooked is detected by an electromotive force due to a change in magnetic flux. The coil in the hook is in contact with the electrode of the coil at the tip of the opening of the hook. This structure is extremely complex and difficult to manufacture. Furthermore, the reliability at the contact point is lacking, and the open part at the tip is a part through which the master rope passes, and it deteriorates with repeated contact. It has a drawback that the whole is not good. As in the previous example, there is a drawback that it is complicated and requires hook strength and weight, such as passing through a hook configured as a tube. In addition, there is a disadvantage that a magnetic material must be applied to the entire master rope. In the present invention, a magnetic material is provided on the master rope side. However, if it is provided uniformly, even if the hook is moved, since the amount of magnetic flux passing through the coil is constant, no electromotive force is generated. In any of the above, there is no detection device using the electrical relationship between the master rope having a conductive line and the signal line having the conductive wire in the master rope for detecting the hook between the master rope and the hook. .

Patent No. 5079637 Japanese Patent No. 3986656

The problem of the present invention is that the mechanical / electrical switch attached to the hook side, the optical sensor, etc.
Provided is a master rope with a signal line for detecting hook hooking by a signal line signal provided in the parent rope and an electric device on the hook side, and a safety band hook hook detecting device using the same.

The master rope with a signal line of the present invention and a safety belt hook detection device using the same,
A conductor wire that passes a signal for electrically detecting that a safety belt hook has been hooked on the rope is provided along the rope, inside or / and outside the rope, and the conductor wire is connected to the signal line. And the other is a conductor wire that is not electrically shielded or an electrically insulated conductor wire that is not electrically shielded, and the other is a conductor wire that is electrically insulated and coated from above. And a safety band using the same, wherein the conductor wire is electrically shielded by allowing the metal body to be grounded at a constant potential. It is a hooking detection device.
Hereinafter, it demonstrates along a claim.

The invention according to claim 1 is a master rope with a signal line,
Along the rope extending a conductor wire through which a signal for electrically detecting that a safety belt hook has been hooked on the rope is provided in and / or outside the rope,
The conductor wires are paired for signal going and return, one is an electrically unshielded conductor wire or an electrically uninsulated insulated conductor wire, and the other is an insulated conductor wire. The conductor wire is covered and covered with a metal body from above, and the metal body can be grounded to a constant potential, whereby the conductor wire is electrically shielded.

The invention according to claim 2 is the master rope with signal line according to claim 1,
The pair of the conductor wires is drawn out on the tip side of the rope, and includes a connecting tool for electrically connecting the two.

The invention according to claim 3 is a master rope with a signal line according to claim 1 or 2 ,
The conductor wire is inserted into a protective tube to protect the conductor wire.

The invention according to claim 4 is a safety belt hooking detection device using a master rope with a signal line,
A master rope with a signal line according to any one of claims 1 to 3 ,
A detection signal generator for generating a detection signal for detecting the hooking; a detector for determining the hooking with respect to the detection signal; a hook to be hooked on the rope; and an electric circuit unit provided in the hook The detection signal is sent from the detection signal generator to the conductor wire, and the hook has a C-shaped portion and a section for hanging on the rope, and one end of the C-shaped portion. One end of the section is rotatably attached, and the other end of the C-shaped part and the other end of the section are in contact with or apart from each other in correspondence with opening and closing of the hook,
The closed state of the hook due to the hook being hung on the rope forms an electric closed circuit with the electric circuit portion provided in the hook, and an electromagnetic field generated by the detection signal flowing through the conductor wire is generated by the electric field. Electrical effects on the closed circuit,
The detector detects the amount of electricity in the electric circuit unit due to an electromagnetic or electrical interaction between the detection signal flowing through the conductor wire and the electric circuit unit, and determines hooking. Features.

The invention according to claim 5 is the safety band hooking detection device using the master rope with the signal line according to claim 4 ,
The electrical circuit unit includes a resonant element circuit having a predetermined resonance frequency, and the detection signal generator generates a signal having the same frequency as the predetermined resonance frequency and sends the signal as the detection signal to the conductor line. The detector receives the detection signal returned through the conductor wire, detects a power loss due to the resonance element circuit based on the signal intensity of the predetermined frequency, and has a loss greater than a predetermined amount. It is characterized in that the case is judged to be hooked.

The invention according to claim 6 is a safety belt hooking detection device using the master rope with a signal line according to claim 5 ,
The resonant element circuit includes a resonant element circuit having a different resonant frequency for each hook, and the detection signal generator correspondingly generates and sends a plurality of signals having the same frequency as the different frequencies. The detector is capable of identifying each hook by the frequency of the lost detection signal by receiving and determining these returning signals.

The invention according to claim 7 is the safety band hooking detection device using the master rope with the signal line according to claim 4 ,
The detection signal generator generates a predetermined signal and sends the signal as the detection signal to the conductor line, and the electric circuit unit amplifies the detection signal component induced in the electric closed circuit. An amplifier is included, and the detector has a threshold value for determining whether or not the signal strength is higher than a desired value.

The invention according to claim 8 is a safety belt hooking detection device using a master rope with a signal line,
A master rope with a signal line according to any one of claims 1 to 3 ,
It has a detection circuit for detecting electrical contact between the conductor wire and the hook.

Since it is configured as described above, the signal line signal provided in the parent rope and the hook-side electrical device can be connected to each other without depending on the mechanical / electrical switch attached to the hook side or the optical sensor. By the action, hooking can be detected.

It is a figure which shows one embodiment of the master rope with a signal wire | line of this invention. It is a figure which shows one embodiment at the time of use of the master rope with a signal wire | line of this invention. It is a figure which shows another embodiment of the safety belt hooking detection apparatus using the master rope with a signal wire | line of this invention. It is a figure which shows another embodiment of the safety belt hooking detection apparatus using the master rope with a signal wire | line of this invention. It is a figure which shows another embodiment of the safety belt hooking detection apparatus using the master rope with a signal wire | line of this invention. It is a figure which shows one embodiment of the safety belt hooking detection apparatus using the master rope with a signal wire | line of this invention.

The master line with a signal line of the present invention,
A conductor wire that passes a signal for electrically detecting that a safety belt hook has been hooked on the rope is provided along the rope, inside or / and outside the rope, and the conductor wire is connected to the signal line. And the other is a conductor wire that is not electrically shielded or an electrically insulated conductor wire that is not electrically shielded, and the other is a conductor wire that is electrically insulated and coated from above. It is a master rope with a signal line, characterized in that the conductor wire is electrically shielded by allowing the metal body to be grounded at a constant potential, which is covered with a body and hooked with a safety belt Using this, the detection device includes a detection signal generator, a detector, and an electric circuit section provided in the hook.
This will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a master rope with signal lines according to the present invention.
1-A is an example in which two conductor wires that are electrical conductors pass through the center of the master rope.
Here, the two conductor wires 120 </ b> A and 120 </ b> B pass through the tube hole 112 of the protective tube 111. The conductor wire 120A is in a state of an insulation-coated electric wire covered with a metal mesh, and the inner insulation-coated electric wire can be electrically shielded by the coating of the metal mesh. That is, the metal net is used while being grounded at a constant potential for shielding. Since the conductor wire 120B is in the state of an insulation-coated electric wire, the electromagnetic field generated around the conductor wire 120B can be used for detection with the outside. Therefore, the two conductor lines 120A and 120B are connected at one end, so that a signal entering from the other end can be sent to the conductor lines 120A and 120B. Constitutes a circuit with a return line.
On the outside of the protective tube 111, a rope body 130 having strength as a parent rope is knitted and formed.
The protective tube 111 including the conductor wires 120A and 120B is flexibly bent so that the rope body 130 bends flexibly. In 1-A, the conductor wires 120A and 120B are drawn out in the length direction on the tip of the master rope (right tip in this figure), but in 1-B, the tip of the master rope (right in this figure) This is an example in which the conductor wires 120A and 120B are drawn out in the lateral direction of the rope on the tip side. As described above, 1-C shows the situation where the two conductor wires 120A and 120B are present in the tube hole 112 of the protective tube 111 described above with the left end enlarged. In the conductor wire 120 </ b> A, the insulation-coated electric wire 121 is covered with a metal net 122. A grounding wire 123 connected to the metal net 122 is used for grounding. For example, on the right side, the conductor wires 120A and 120B are connected, and the left insulated wires 121 and 124 are electrically connected as signal lines to a signal source and a detector, respectively. In this way, it is advantageous to provide two conductor wires in the master rope because an electric circuit can be configured only by this.
Of the two conductor wires, one of the reciprocating wires is shielded for the following reason.
When shielded, the electromagnetic field of the shielded wire does not come out and is not detected outside. Therefore, since only the electromagnetic field on the unshielded side is detected outside, a detection signal can be obtained. If both are unshielded, the same signal will flow through both wires, and in the opposite direction, the electromagnetic fields will cancel each other and will not come out. Therefore, a detection signal cannot be obtained. This is why only one side is shielded.
The protective tube 111 is not always necessary, but if it is taken in and out of an electric wire such as an insulation-coated electric wire, it becomes easy and convenient.

1-D and 1-E show the case where there is one conductor wire. 1-D has a configuration in which a rope body 130 having strength as a parent rope is knitted around the insulation-coated electric wire 140 (in this case, not necessarily insulated).
1-E is an example in which at least the side surface 150 of the rope body 130 having strength as a parent rope is a conductor.
Of course, the entire master rope may be knitted with a conductor.
Since there is only one conductor wire, it is a little inconvenient as compared with the case of two wires because it is necessary to prepare another return conductor wire connected to the conductor wire in addition to the master rope.
In the above description, the electric circuit is configured to detect the electromagnetic field. However, considering the mere electric contact, the electric circuit with the hook side is configured in order to see the hook contact. Main line may be used. However, since a single line cannot be used unless a conductor line is drawn to make a circuit as a whole, it is troublesome to use and extremely difficult to use.

FIG. 2 is a diagram showing an embodiment when the master line with signal lines of the present invention is used.
In particular, FIG. 1 shows a connector 200 that simply connects two conductor wires 120A and 120B of the master rope with signal lines shown in 1-A and 1-B of FIG. 1 at one end.
The main conductor side conductor wires 120A and 120B are respectively connected to two conductor pins 201. On the right side, there are two conductor pin receivers 202 into which the conductor pins 201 are inserted. 203 is electrically connected. The conductor pin 201 and the conductor pin receiver 202 are inherent in male and female connector containers 210A and 210B that can be fitted together.
Therefore, the conductors 120A and 120B can be easily electrically connected by fitting the connector as the connector.

FIG. 6 is a diagram showing an embodiment of a safety belt hooking detection device using the master rope with signal lines of the present invention.
The safety belt hooking detection device 600 uses the master rope 610 with a signal line described above,
The master line with signal line 610, a detection signal generator 620 that generates a detection signal for detecting hooking, a detector 630 that receives the detection signal to determine hooking, a hook 640, and And a detection signal is sent from the detection signal generator 620 to the conductor wire (120A, 120B in FIG. 1) of the master rope 610 with a signal line via the conductor wire 611 and the hook 640. Has a C-shaped portion 642 and a section 643, and one end of the section 643 is rotatably attached to one end of the C-shaped section 642 by a rotation coupling portion 644, corresponding to opening and closing of the hook 640, Inside the other end of the C-shaped part 642, the other end of the section 643 is separated or in contact, and in the closed state of the hook in a state where the hook 640 is hung on the master rope 610 with a signal line, Letter C End end and intercept 643 Jo 642 in electrical contact,
An electrical closed circuit is formed between the electrical circuit unit 641 provided in the hook, and an electromagnetic field generated by the detection signal has an electrical effect on the electrical closed circuit, and the detection signal flowing through the conductor wire 611 and the electrical circuit unit 641 The hooking can be determined by the occurrence of an electrical interaction between the two.
The detection signal generator 620, the detector 630, and the electric circuit portion 641 provided in the hook 640 are different from each other in the example of FIG. 3 and FIG.
The hook 640 is used by being hung on the master rope 610 with a signal line. When you hang
The section 643 is pushed inward to open, and the master rope with a signal line 610 is taken into the C-shaped portion 642 from the gap. When the segment 643 is returned and closed, both ends of the segment 643 and the C-shaped portion 642 are in electrical contact, and the electric circuit unit 641 becomes an electrical closed circuit.
3 and FIG. 4 is common to the master rope with signal line 100 including the two signal lines of the one-side shield of 1-A or 1-B of FIG. It is that it is electrically connected by the connection tool 200.

FIG. 3 is a diagram showing an embodiment of a safety belt hooking detection device using the master rope with signal lines of the present invention.
The safety belt hooking detection device 3000 includes a master line 100 with a signal line, a hook 3100, a detection signal generator 3210 that sends a detection signal to the conductor wires 120A and 120B of the master line 100 with a signal line, and a hooking from a return signal. It has detector 3220 which detects.

As described with reference to FIG. 6, the hook 3100 has a C-shaped portion 642 and a section 643, and the electric circuit portion 641 is the same. The electric circuit unit 641 is a resonant element circuit 3110.
In the C-shaped portion 642 and the section 643, an electric wire (if the hook is a metal, it can be used as a conductor so that the electric wire is unnecessary) is arranged, and the tip of the hook section and the tip of the C-shaped portion receiving it are arranged. Electrical contact is made to form an electrical closed circuit. Therefore, in the state where the hook 3100 is hooked on the master rope with signal line 100, the signal line of the master rope penetrates the electrically closed circuit, the electromagnetic field of the signal line intersects, and the resonance element circuit 3110 Electromagnetic coupling is possible. As shown in the figure, the resonance element circuit 3110 may be a combination of passive elements of electric resistance, inductance, and capacitance, or a combination of these elements and active elements such as transistors. .

In the example of FIG. 3, the detector 3220 is provided substantially in the same body as the detection signal generator 3210. The detection signal generator 3210 generates a signal having the same frequency as the resonance frequency of the resonance element circuit 3110, and transmits the signal to the conductor lines 120A and 120B. Detector 3220 receives return signals from conductor wires 120A and 120B and detects them as follows. Since the resonant frequency of the resonant element circuit 3110 and the frequency of the signal oscillated by the detection signal generator 3210 are the same, the resonant element circuit 3110 resonates with the transmitted signal to obtain energy. As a result, energy loss can occur on the signal side. If the loss of the frequency is detected, it is possible to detect that there is hooking having the resonance element circuit 3110 if there is energy loss. If the hook is removed, there is little or no energy loss. This can be detected at any position in the length direction of the master rope.
If a plurality of resonant element circuits 3110 having different frequencies are provided and switched on the hook 3100 side, an oscillation signal having a plurality of frequencies may be transmitted on the detection signal generator 3210 side of the field terminal. Since energy loss is seen only in the frequency component, it can be determined which hook 3100 having the resonance element circuit 3110 is engaged, and individual recognition (recognition by the user) can be performed among a plurality.
In addition, since hooking can be detected on the site terminal side, if an alarm means or a communication means is provided, if the hook is not hooked or removed, the site terminal or other terminals can be managed remotely. Judgment or / and an alarm can be made by the device.

FIG. 4 is a diagram showing another embodiment of the safety band hooking detection device using the master rope with signal lines of the present invention.
In the example of FIG. 3, the detector 3220 is provided substantially in the same body as the detection signal generator 3210. However, in FIG. 4, the detector 4120 is provided in the same body as the electric circuit portion 4110 on the hook 4100 side of the safety belt. Yes.
The overall configuration will be described.
The safety belt hooking detection device 4000 includes a master line 100 with a signal line, a hook 4100, and a detection signal generator 4210 that sends a detection signal to the conductor lines 120A and 120B of the master line with a signal line 100.
As described with reference to FIG. 6, the hook 4100 has a C-shaped portion 642 and a section 643, and the electric circuit portion 641 is the same, and the electric circuit portion 641 is a hook opening / closing piece. Are electrically contacted with each other at the tip of the C-shaped portion that receives the tip, thereby forming an electrical closed circuit.
Further, a detector 4120 is provided in electrical connection with the electric circuit portion 641.
As in the example of FIG. 3, when the hook is made of metal, it can be used as a conductor, so that no electric wire is required.
Therefore, in the state where the hook 4100 is hooked on the master rope with signal line 100, the signal line of the master rope penetrates through the electrical closed circuit, the electromagnetic field of the signal line intersects, and between the electrical closed circuit and Electromagnetic coupling is possible.
When an induced current flows through the conductor of the electric circuit portion of the hook 4100 by the detection signal, this is input to the amplifier in the detector 4120 and amplified, and if a signal having a magnitude greater than or equal to a predetermined value is detected, Assuming that a signal flowing through the signal line is detected, it is determined that the hook is hooked to the master rope.
Since the result is used for alarm output and communication with other terminals and remote management devices, it is convenient to have alarm means and communication means as in FIG.
Accordingly, the determination of hooking is performed by the hook 4100 including the detector 4120, and hence the device on the operator side, unlike FIG. 3. And since the difference with FIG. 3 is not using resonance, the frequency of the detection signal generator 4210 with which a field terminal is provided becomes arbitrary. Also, no loss of return signal is seen.

FIG. 5 is a diagram showing another embodiment of the safety belt hooking detection device using the master rope with signal lines of the present invention. In the figure, reference numeral 510 denotes a hook.
In 5-A, it is a case where the structure of FIG. 3 is taken using the master rope of 1-D of FIG. Other return lines are required as shown by the dotted lines. Of course, the determination is also the role of the detector.
5-B is a case where hooking detection by electrical contact is detected using the master rope of 1-E in FIG. Therefore, the electrical conductor of the master rope and the electrical conductor of the hook are contacted by detecting electrical continuity. In any case, in the case of a single line, it is necessary to prepare another conductor line, and inconvenience remains. Electrical continuity detection is also the role of the detector.

Note that ropes, bands and harnesses other than hooks as safety belts are omitted as they are natural as safety belts.
3 and 4 also show area sensing means for area sensing, which is managed by the safety band or the hook and therefore the operator wearing it to prevent falling. It is for detecting that the user is entering the working area for a high altitude, and during this time, it is for detecting hooking, which is convenient. In addition, since the area sensing means detects being in the area, many detection means such as RFID-TAG and its reader, foot switch, image detection, and screen light switch are conceivable. Furthermore, the area sensing means may be provided on any of the detection signal generator side, the hook side, a desired area, and the like.

As described above, in the master rope with a signal line according to the present invention and the safety belt hooking detection device using the same, without depending on the mechanical / electrical switch attached to the hook side, the optical sensor,
Since hooking can be detected by the interaction between the signal of the signal line provided in the master rope and the electric device on the hook side, it is extremely convenient for industrial use.

DESCRIPTION OF SYMBOLS 100 Master rope with signal line 111 Protective pipe 112 Pipe holes 120A, 120B Conductor wires 121, 124, 140 Insulated coated electric wire 122 Metal mesh 123 Grounding wire 130 Leash body 150 Side surface 200 Connector 201 Conductor pin 202 Conductor pin receiver 203 Connected body 210A, 210B Connector container 600 Safety belt hooking detection device 610 Master rope with signal line 620, 3210, 4210 Detection signal generator 630, 3220, 4120 Detector 640 Hook 641, 4110 Electric circuit portion 642 C-shaped portion 643 Section 644 Rotation coupling unit 3000, 4000 Safety belt hooking detection device 3100, 4100 hook 3110 resonance element circuit

Claims (8)

Along the rope extending a conductor wire through which a signal for electrically detecting that a safety belt hook has been hooked on the rope is provided in and / or outside the rope,
The conductor wires are paired for signal going and return, one is an electrically unshielded conductor wire or an electrically uninsulated insulated conductor wire, and the other is an insulated conductor wire. A signal which is covered and covered with a metal body from above, so that the metal body can be grounded to a constant potential so that the conductor wire is electrically shielded. Master line with lines. 2. The master rope with signal lines according to claim 1, wherein the pair of conductor wires is drawn out at a distal end side of the rope and includes a connection tool for electrically connecting the two. 3. The master rope with a signal line according to claim 1 , wherein the conductor wire is inserted into a protective tube in order to protect the conductor wire. A master rope with a signal line according to any one of claims 1 to 3 ,
A detection signal generator for generating a detection signal for detecting the hooking; a detector for determining the hooking with respect to the detection signal; a hook to be hooked on the rope; and an electric circuit unit provided in the hook The detection signal is sent from the detection signal generator to the conductor wire, and the hook has a C-shaped portion and a section for hanging on the rope, and one end of the C-shaped portion. One end of the section is rotatably attached, and the other end of the C-shaped part and the other end of the section are in contact with or apart from each other in correspondence with opening and closing of the hook,
The closed state of the hook due to the hook being hung on the rope forms an electric closed circuit with the electric circuit portion provided in the hook, and an electromagnetic field generated by the detection signal flowing through the conductor wire is generated by the electric field. Electrical effects on the closed circuit,
The detector detects the amount of electricity in the electric circuit unit due to an electromagnetic or electrical interaction between the detection signal flowing through the conductor wire and the electric circuit unit, and determines hooking. A safety band hooking detection device using a characteristic master rope with a signal line. The electrical circuit unit includes a resonant element circuit having a predetermined resonance frequency, and the detection signal generator generates a signal having the same frequency as the predetermined resonance frequency and sends the signal as the detection signal to the conductor line. The detector receives the detection signal returned through the conductor wire, detects a power loss due to the resonance element circuit based on the signal intensity of the predetermined frequency, and has a loss greater than a predetermined amount. 5. The safety band hooking detection device using a master rope with a signal line according to claim 4, wherein the case is judged to be hooking. The resonant element circuit includes a resonant element circuit having a different resonant frequency for each hook, and the detection signal generator correspondingly generates and sends a plurality of signals having the same frequency as the different frequencies. 6. The signal according to claim 5 , wherein the detector is capable of identifying each hook by the frequency of the detection signal which has received a loss by receiving and judging these returning signals. Safety belt hooking detection device using a master rope with wire. The detection signal generator generates a predetermined signal and sends the signal as the detection signal to the conductor line, and the electric circuit unit amplifies the detection signal component induced in the electric closed circuit. 5. The safety band hooking detection apparatus using a master rope with a signal line according to claim 4, wherein the detector has an amplifier and has a threshold having a threshold value for judging whether or not the signal intensity is higher than a desired value. A master rope with a signal line according to any one of claims 1 to 3 ,
A safety belt hooking detection apparatus using a master rope with a signal line, comprising a detection circuit for detecting an electrical contact between the conductor wire and the hook.

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