JP4631210B2 - Elevator guide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator that moves up and down along a guide rail.
[0002]
[Prior art]
Conventionally, in an elevator apparatus, a car carrying a person or luggage is suspended at one end of a rope wound around a sheave of a hoisting machine, and a counterweight is suspended at the other end, and the car is utilized using friction between the rope and the sheave. A so-called traction system is generally used, but recently, a self-propelled type such as a low press elevator apparatus using a linear motor as a drive source and not using a rope has been proposed.
[0003]
FIG. 2 shows a configuration of a conventional low press elevator apparatus. In this apparatus, permanent magnets 2 are provided on a pair of opposing surfaces of a car 1, and armature windings 4 are provided on a hoistway wall 3. That is, a linear motor having a permanent magnet 2 as a mover and an armature winding 4 as a stator is configured, and the car 1 is directly driven by the linear motor and moves up and down along the guide rail 5. Yes.
[0004]
By supplying a three-phase AC voltage to the armature winding 4 provided on the hoistway wall 3 and generating a moving magnetic field, the phase of the moving magnetic field and the magnetic field of the permanent magnet 2 provided in the car 1 are shifted. The guide force is generated to cause the car 1 to have a propulsive force.
[0005]
The position and speed of the car 1 are detected by a photoelectric sensor composed of a projector 6 a and a light receiver 6 b, and the distance between the car 1 (movable element) and the hoistway wall 3 (stator), that is, the gap δ is determined by the gap sensor 7. Detected. Then, an output signal from the photoelectric sensor is input to the conversion circuit 8, converted into information on the speed S and the position X, and output to the propulsion force controller 9.
[0006]
The propulsive force controller 9 calculates an effective current value I ^* based on the speed S, position X, and gap δ of the car 1 and outputs it to the phase converter 10. Then, the phase converter 10 determines the effective current value I ^* from the effective current value I ^*. The voltage command (V _u , V _v , V _w ) is converted and output to the inverter 11. The inverter 11 controls the drive currents (I _u , I _v , I _w ) of the armature winding 4 based on the voltage command.
[0007]
[Problems to be solved by the invention]
Incidentally, in such a self-propelled elevator using a linear motor, it is necessary to keep the gap δ between the armature 4 and the permanent magnet 2 within a displacement amount of about 0.5 mm, but this gap δ is detected and this gap δ is detected. It is extremely difficult to control such that the amount is kept at an appropriate amount, and the mechanism itself is complicated.
[0008]
The present invention has been made in view of the above points, and an object thereof is to provide an elevator guide device having a simple mechanism gap adjustment function.
[0009]
[Means for Solving the Problems]
The present invention relates to an elevator guide device for guiding a car along a guide rail standing on a hoistway, wherein the guide device has a guide roller for guiding the car along the guide rail on one side. The rib is pivotally attached and the other side has a rib fixed to the car side. The rib has a wide portion for supporting a bending moment acting via the guide roller, and the bending moment causes distortion. A thin portion, and the thin portion is provided with a strain gauge for detecting the strain .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the guide device itself has a function of detecting a gap.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is an overall view of a roller guide according to the present invention provided on a car 1 and guided by a guide rail 5, FIG. 3 is a partially enlarged view of FIG. 1, and FIG. 4 is a detection circuit diagram of a gap δ according to the present invention. is there.
[0012]
In the figure, the same reference numerals as those in FIG. 2 denote the same parts, but 20 is a leaf spring, for example, an L-shaped bracket having ribs 21 on both sides. A guide roller 22 is supported and is in contact with the guide rail 5 so as to always press it. Reference numeral 23 also denotes a guide roller, which is arranged so as to sandwich the guide rail 5 from three directions together with the guide roller 22 and the guide roller 22 on the back side of the sheet.
[0013]
Reference numerals 24 and 25 denote holes provided in the rib 21 so that the thin portion thickness t ₁ and the thin portion thickness t ₂ are generated. Strain gauges 31, 32, 33, and 34 are provided around the thin portion thicknesses t ₁ and t _2. Is provided. The strain gauges 31, 32, 33, and 34 change electric resistance when a bending moment acts on the bracket 20.
[0014]
When the bending moment M _z shown in FIG. 1 is generated, the bending moment M _z is supported by the wide portion 21 a of the rib 21, and the thin portions 21 b and 21 c formed on the rib 21 are distorted. , 32, 33, and 34, and the signal is amplified by a bridge circuit.
[0015]
If the thin-walled portion thicknesses t ₁ and t ₂ are made equal (t ₁ = t ₂ ) and a circuit bridge is constructed with this strain gauge as shown in FIG. 4, the input voltage is as shown in FIG. A gap δ detector having an input / output characteristic for generating an output voltage can be obtained. This means that an electric circuit having a proportional relationship with the pressing force to the guide roller 22 can be easily obtained.
[0016]
With respect to such input / output characteristics, it is possible to know details of the proportional relationship by applying a load to the rib 21 in advance and measuring the output voltage. (Naturally, if the values of the thin wall thicknesses t ₁ and t ₂ change, the characteristics also change.)
[0017]
As described above, if the data regarding the amount of the gap δ is obtained as an electric signal, the control of the attractive force between the armature and the permanent magnet is performed based on this signal, and the active control for suppressing the vibration of the car 1 is performed. It can also be used for vibration signals. It is also possible to use the vibration data in the car and the pressure data to check the correlation between the guide device and the vibration phenomenon in the car. When processing data related to vibration, the guide device according to the present invention can naturally be used regardless of the presence or absence of a hoisting rope, that is, a low press elevator or a rope type elevator.
[0018]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a gap detector in the guide device itself having a simple structure, and this output signal can be used as it is for the investigation of vibration and various controls.
[Brief description of the drawings]
FIG. 1 is an overall view of a roller guide according to the present invention.
FIG. 2 is a configuration diagram of a low press elevator apparatus using a linear motor.
FIG. 3 is a partially enlarged view of FIG. 1;
FIG. 4 is a detection circuit diagram of a gap δ according to the present invention.
FIG. 5 is a diagram illustrating the input / output characteristics of FIG. 4;
[Explanation of symbols]
The wide portion 21b of the 1 car 5 guide rails 20 bracket 21 rib 21a rib 21, the thin portions 22, 23 guide rollers 31, 32, 33, and 34 strain gauges t ₁ of 21c rib 21, t thin section thickness of the _second rib 21

Claims (3)

In an elevator guide device that guides a car along a guide rail standing on a hoistway,
The guide device has a rib fixed to the car side on the other side, and a guide roller for guiding the car along the guide rail on one side and a rib fixed to the car side on the other side. It has a wide portion that supports a bending moment acting via a guide roller, and a thin portion that generates strain due to the bending moment, and the thin portion is provided with a strain gauge that detects the strain. Elevator guide device. In an elevator guide device that guides a car along a guide rail standing on a hoistway,
The guide device, on both sides of the bracket comprises a bracket L-shaped is disposed ribs, the said ribs have a thin wall portion, wherein the to Rue elevators, further comprising a strain gauge in the vicinity of said thin portion Guidance device. 2. The elevator guide device according to claim 1, wherein the thin portion and the wide portion are formed by holes provided in the rib . 3.

Images