JP2001316059A - Stabilizer for traveling cable characteristic of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that the temperature drop in a hoistway hardens the sheath material of a traveling cable, which makes the traveling cable collide against equipment or the like in the hoistway when a car is raised and lowered. SOLUTION: The outermost layer of an ordinary wire core 5 in a traveling cable 3 is taken as a specific wire core 6 of high resistance. When the temperature in the hoistway drops to a prescribed value or less, a current is carried in the specific wire core 6 to generate heat. The hardening of a sheath material 7 can be prevented by generation of heat in the specific wire core 6 and, the traveling cable 3 can be suspended in the same free bending diameter as at an ordinary temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for stabilizing a bending characteristic of a moving cable used in an elevator.

[0002]

2. Description of the Related Art FIGS. 9 and 10 are vertical sectional views of a hoistway showing a suspended state of a moving cable of a conventional elevator.
FIG. 10 is a state diagram when the car is lowered, and FIG. 10 is a state diagram when the car is raised. The moving cable 3 is a cable used for transmitting and receiving power and signals between the car 2 and a control panel (not shown).
It is fixed by the lower suspension 4. Then, the moving cable 3 is separated by a diameter (free bending diameter) that can be bent without difficulty when naturally bent, and the other end is fixed to a suspension (not shown) of the hoistway 1.

[0005] As the car 2 moves up and down, the bent portion of the moving cable 3 (hereinafter referred to as a U-shaped bottom) moves up and down as needed. In addition, the moving cable 3 has a collective core covered with a sheath material, and the core is twisted to improve flexibility. As the sheath material, a vinyl-based material is generally used. It is used. Since the hardness (rigidity) of the vinyl-based material rapidly increases at low temperatures, the free bending diameter of the moving cable 3 is much larger than the free bending diameter at room temperature.

Therefore, if the moving cable 3 is suspended with reference to the free bending diameter near normal temperature, the U-shaped bottom of the moving cable 3 increases as the car 2 moves up and down. Therefore, when the car 2 descends, as shown in FIG.
When the vehicle 2 collides with the equipment or the building structure 25 or the car 2 stops rising, the moving cable 3 may collide with the car 2 due to the swing back of the moving cable 3 as shown in FIG.

Therefore, as a countermeasure against this, for example, Japanese Unexamined Patent Publication
As shown in JP-A-288588, a device is proposed in which a magnet that generates a magnetic force is attached to a moving cable, a magnetic body is provided in a hoistway, and a cable guide that generates a damping force by the cooperation of the two is proposed. Have been.

[0006]

In the conventional moving cable damping device for an elevator as described above, a magnet is attached to the moving cable and a magnetic body is attached to the hoistway, so that the entire moving cable and hoistway are covered. In addition to the above, there is a problem that the cost is increased and the noise when the moving cable is attracted by the magnetic force is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a low-cost structure so that the moving cable can be suspended at the same free bending diameter even at a low temperature as at a normal temperature. It is intended to provide a device.

[0008]

According to a first aspect of the present invention, an apparatus for stabilizing the characteristics of a moving cable of an elevator is provided with a specific wire core which generates heat when energized in the moving cable.

Further, the moving cable characteristic stabilizing device for an elevator according to the second invention is provided with a specific core which generates heat by energization in the moving cable, and energizes the specific core according to the temperature in the hoistway. It is intended to be controlled.

In a third aspect of the present invention, there is provided the elevator moving cable characteristic stabilizing device according to the second invention, wherein the temperature in the hoistway is calculated based on the resistance value of a normal wire core in the moving cable. Things.

The moving cable characteristic stabilizing device for an elevator according to a fourth aspect of the present invention is the device according to the second aspect, wherein when a temperature in the hoistway falls below a predetermined value, a specific core is energized. is there.

A fifth aspect of the present invention is an elevator moving cable characteristic stabilizing apparatus according to the second to fourth aspects of the present invention, wherein the specific core is the outermost core of the normal core in the moving cable. It is set to.

According to a sixth aspect of the present invention, in the moving cable characteristic stabilizing device for an elevator according to the second to fourth aspects, a specific core is set separately from a normal core in the moving cable. It is arranged on the front side of the cable.

According to a seventh aspect of the present invention, there is provided the elevator moving cable characteristic stabilizing apparatus according to the second to sixth aspects, wherein the current is controlled to be large at the time of normal start to a specific wire core, and The current is limited to a predetermined value.

An eighth aspect of the present invention is an elevator moving cable characteristic stabilizing apparatus according to the second to seventh aspects, wherein the resistance value of the specific wire core is made higher than the resistance value of the normal wire core. It was done.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 6 show an embodiment of the first to fifth and eighth inventions of the present invention. FIG. 1 is a circuit configuration diagram, FIG. 2 is a hoistway cross-sectional view, and FIG. 3 is a hoistway longitudinal section. 4, FIG. 4 is an end view (partial cross section) of the moving cable, FIG. 5 is a diagram showing the relationship between the ambient temperature of the inner core of the moving cable and the conductor resistance, and FIG. 6 is a diagram showing the relationship between the ambient temperature of the moving cable and the hardness of the sheath material. In the drawings, the same reference numerals indicate the same parts.

In the elevator, as shown in FIGS. 2 and 3, between the car 2 and the hoistway 1 that move up and down the hoistway 1
The moving cable 3 is suspended. The moving cable 3 is fixed to the suspension 4 below the car 2 and suspended so as to have a diameter (free bending diameter) that can be bent without difficulty. As shown in FIG. 4, the moving cable 3 according to this embodiment includes a normal core 5 occupying most of the collective core and a high resistance core (hereinafter referred to as a specific core) disposed on the outermost layer of the collective core. 6) are covered with a sheath material 7.

In FIG. 1, reference numeral 11 denotes a reference resistor which is connected in series with the core 5 and connected between the power source V-0.
12 is a voltage detecting means connected to the connection point A, 13 is a cable resistance calculating means connected to the voltage detecting means 12, 14 is a temperature calculating means connected to the cable resistance calculating means 13, and 15 is a temperature calculating means. Relay driving means connected to the means 14, 16 is a transistor connected to the relay driving means 15, 17 is a relay connected to the transistor 16, 17a is a normally open contact, 18 is a current limiting resistor, and 18a is a current limiting resistor. Are connected in series with a specific wire core 6 via a power supply V-0.

Next, the operation of this embodiment will be described.
A potential is generated at a connection point A between the reference resistor 11 and the wire core 5 in FIG. This potential is detected by the voltage detecting means 12, and the resistance value of the core 5 is calculated by the cable resistance value calculating means 13. The cable temperature is calculated by the temperature calculation means 14 based on the calculated resistance value. Here, wire core 5
Can be represented by the following equation.

Rt = Ro (1 + αt) Here, Rt: electrical resistance at temperature t ° C. Ro: electrical resistance at temperature 0 ° C. α: temperature coefficient determined by material This relationship is shown in FIG. Here, R1 indicates a resistance change of a normal conductor, and R2 indicates a resistance change of a conductor having a high resistance value and a high temperature coefficient α.

The temperature calculating means 14 calculates the temperature t according to the above equation. When the temperature t falls below a predetermined value, the relay driving means 15 generates an output, the transistor 16 is turned on, and the relay 17 is energized. The contact 17a is closed. When the contact 17a is closed, the specific wire core 6 is energized via the current limiting resistor 18, and the specific wire core 6 generates heat and raises the temperature of the sheath material 7. As shown in FIG. 6, when the temperature of the sheath material 7 is low, the hardness of the sheath material 7 is high and the hardness of the sheath material 7 is high. When the temperature is high, the hardness of the sheath material 7 decreases.

Here, the hardness of the sheath material 7 corresponds to the free bending diameter of the cable. The higher the hardness, the larger the free bending diameter. The lower the hardness, the smaller the free bending diameter. D1 indicates an allowable cable bending diameter. In this way, due to the heat generated by energization of the specific wire core 6, even when the ambient temperature is low, the sheath material 7 does not become hard, has the same rigidity as normal temperature, and suspends the moving cable 3 with the same free bending diameter as normal temperature. It is possible to do.

The current can be supplied only when there is a possibility that the sheath member 7 is hardened. Further, since the specific wire core 6 is disposed on the outermost layer, the temperature of the sheath material 7 can be efficiently increased.

Embodiment 2 FIG. FIG. 7 is an end view (partial cross section) of a moving cable showing an embodiment of the sixth invention of the present invention. 1 to 3, 5 and 6 are also used in the second embodiment. In this embodiment, a normal wire core 5 is used.
Separately, a high-resistance specific core 20 is provided on the cable surface side, and power is supplied to the specific core 20, so that the temperature of the sheath material 7 can be efficiently increased.

Embodiment 3 FIG. 8 is a circuit diagram showing a seventh embodiment of the present invention. In addition, FIG.
FIG. 6 is also used in the third embodiment. In the figure, 17
b and 17c are normally open contacts of the relay 17, 21 is a current limiting resistor, 22 is connected between the power supply V-0 via the contact 17c, and when energized, closes the contact 22a, and after a certain time, the contact is closed. It is a timed relay that opens 22a. Further, the current limiting resistor 21 is connected to a specific core 6 via the contacts 17b and 22a. Other than the above, it is the same as FIG.

Next, the operation of this embodiment will be described.
As in FIG. 1, when the temperature in the hoistway falls below a predetermined value,
When the relay 17 is energized, the contacts 17a to 17c close. When the contact 17c is closed, the timed relay 22 is energized, and the contact 22a is closed. With this, the current limiting resistor 18,
Since the wires 21 are connected in parallel and connected to the specific wire core 6, a large current is supplied to the specific wire core 6 to rapidly raise the temperature of the sheath material 7. When a certain time elapses after the timed relay 22 is energized, the contact 22a is opened, the current limiting resistor 21 is disconnected, and the state is the same as that of FIG.

[0027]

As described above, in the first invention of the present invention, a specific wire core which generates heat by energization is provided in the moving cable, and in the second invention, a specific wire core is provided according to the temperature in the hoistway. Is controlled, the hardening of the sheath material can be prevented, and the moving cable can be suspended at the same free bending diameter as at room temperature.

Further, in the third invention, the temperature in the hoistway is
Since the calculation is performed based on the resistance value of the normal wire core in the moving cable, the temperature in the hoistway can be accurately measured.

According to the fourth aspect of the present invention, when the temperature in the hoistway falls below a predetermined value, power is supplied to a specific wire core. Therefore, power can be supplied only when there is a possibility that the sheath material is hardened. it can.

Further, in the fifth invention, the specific core is set as the outermost layer core of the normal core in the moving cable, and in the sixth invention, the specific core is set in the moving cable. Since it is set separately from the normal wire core and is arranged on the surface side of the moving cable, the temperature of the sheath material can be raised efficiently.

Further, in the seventh invention, the energizing current is controlled to be large at the start of energization to a specific core, and the energizing current is limited to a predetermined value after the energization starts. Can be raised in a short time.

In the eighth aspect, the resistance value of the specific core is set to be higher than the resistance value of the normal core, so that the current required for heat generation can be suppressed.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram showing Embodiment 1 of the present invention.

FIG. 2 is a hoistway cross-sectional view showing Embodiment 1 of the present invention.

FIG. 3 is a vertical sectional view of a hoistway showing the first embodiment of the present invention.

FIG. 4 is an end view (partial cross section) of the moving cable according to the first embodiment of the present invention;

FIG. 5 is a diagram showing the relationship between the ambient temperature and the conductor resistance of the inner core of the moving cable according to the first embodiment of the present invention.

FIG. 6 is a diagram showing the relationship between the ambient temperature of the moving cable and the hardness of the sheath material according to the first embodiment of the present invention.

FIG. 7 is an end view (partial cross section) of a moving cable according to a second embodiment of the present invention.

FIG. 8 is a circuit configuration diagram showing Embodiment 3 of the present invention.

FIG. 9 is a vertical sectional view of a hoistway (when a car descends) showing a suspended state of a moving cable of a conventional elevator.

FIG. 10 is a vertical sectional view of a hoistway (when a car is raised) showing a suspended state of a moving cable of a conventional elevator.

[Explanation of symbols]

1 hoistway, 2 cars, 3 moving cable, 5 normal wire core, 6 specific wire core, 7 sheath material, 13 cable resistance value calculation means, 14 temperature calculation means, 15 relay drive means, 17 relays, 17a-17c Relay contact 1
8 Current limiting resistance, 20 Specific core, 21 Current limiting resistance, 2
2 Timed relay, 22a Timed relay contact.

Claims (8)

[Claims] 1. A moving cable for an elevator, which is suspended in a free state with one end connected to a car that moves up and down in a hoistway, wherein a specific wire core that generates heat when energized is provided in the moving cable. Elevator moving cable characteristics stabilizer. 2. A moving cable of an elevator having one end connected to a car which moves up and down the hoistway and suspended in a free state, wherein a specific wire core which generates heat when energized is provided in the moving cable. A moving cable characteristic stabilizing device for an elevator, comprising an energization control means for controlling energization to the specific core according to a temperature. 3. A moving cable characteristic stabilizing device for an elevator according to claim 2, further comprising a temperature calculating means for calculating a temperature in the hoistway based on a resistance value of a normal wire core in the moving cable. 4. The moving cable characteristic stabilizing device for an elevator according to claim 2, wherein the energization control means is configured to energize a specific wire core when the temperature in the hoistway falls below a predetermined value. 5. The movement of an elevator according to claim 2, wherein the specific core is set to the outermost core of the normal core in the moving cable. Cable characteristic stabilizer. 6. The moving cable according to claim 2, wherein a specific wire core is set separately from a normal wire core in the moving cable, and is arranged on a surface side of the moving cable. A moving cable characteristic stabilizer for an elevator as described in the above. 7. A current limiting means for controlling an energizing current to a large value when energizing a specific wire core is started and for limiting the energizing current to a predetermined value after the energizing is started. An elevator moving cable characteristic stabilizing device according to any one of claims 2 to 6. 8. The elevator moving cable characteristic stabilizing device according to claim 2, wherein the resistance value of the specific core is higher than the resistance value of the normal core.