JPS5839753B2 - Elevator car guide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a guide device for guiding the elevator car up and down.

The elevator car has a guide shoe installed on the car,
A guide device such as a guide roller moves up and down while being guided by a guide rail.

This guide device is shown in FIGS. 1 and 2.

In the figure, 1 and 1 are guys 1 that are erected along the hoistway 2 and have a T-shaped cross section facing each other! Rail, 3 is a car frame placed between the rails 1 and 1 and suspended by the main rope 4, 5 is a car compartment installed inside the car frame, 6 is a guide fixed at four locations above and below the car frame 3. Although shown in a simplified manner, rollers 6a to 6c sandwiching the rail 1 from three sides are pivotally mounted.

Further, a counterweight (not shown) is similarly configured.

That is, the rollers 6a and 6b are pressed against both sides of the rail 1, and the roller 6c is pressed against the top surface of the rail 1 by springs (not shown), and these surfaces are moved as the car 5 moves up and down.

Thereby, the car 5 is smoothly guided to the guide rail 1.

A plurality of guide rails 1 are connected and erected from the bottom to the top of the hoistway 2.

If the guide rail 1 is bent at the seam or has a step at the seam, the roller 6a
When rollers 6a to 6c pass, rollers 6a to 6c receive a horizontal external force.

This causes the car frame 3 to sway, making the ride inside the car room 5 uncomfortable.

Therefore, extremely high precision has been required for the alignment and installation of the guide rail 1.

Particularly in recent years, as the number of ultra-high-speed, high-lift elevators has increased, the accuracy of the above-mentioned processing and installation has become extremely strict, and it has become difficult to ensure the same riding comfort as before.

The present invention is intended to improve the above-mentioned drawbacks, and aims to provide a guiding device that smoothly guides a car and does not impair riding comfort even when the elevator reaches extremely high speeds and high lifts.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

In FIGS. 3 and 4, γ to 9 are two locations above and below one side of the cage frame 3 (the lower side is not shown).

), and in particular, the attachment of electromagnets γ, 8 is omitted because the diagram would be complicated and difficult to read if the state of attachment of electromagnets γ, 8 to the heel 3 was drawn accurately.

io and 'ii are respectively formed in a U-shape and have their end surfaces facing both sides of the guide rail 1; 12 is an iron core that is also facing the top surface of the guide rail 1; 13 to 1;
5 are coils wound around iron cores 10 to 12, respectively, TA
9A are electromagnets installed on the right side of FIG. 3, and the same electromagnets 7 to 9 are installed at four locations above and below the basket frame 3.

Reference numeral 16 denotes a gap detector that outputs an output according to a change in the gap between the iron core 11 and the side surface of the guide rail 1. For example, it can also detect a change in capacitance due to a change in the gap.

17 is a gap detector for the gap between the iron core 12 and the top surface of the guide rail 1, and 1B is a gap detector for the electromagnet 8A on the right side of FIG.

In Figure 5, 20 is an AC power supply, 21.22 is a thyristor,
23 and 24 are ignition circuits corresponding to the thyristors 21 and 22, which operate differentially with respect to the output of the air gap detector 16.

The circuit in Figure 5 has one set for the other electromagnets 9 and 9A mentioned above,
Electromagnet γA.

One set is also provided for 8A, and similarly provided at the lower part of the heel frame 3 in FIG.

However, the power supply 20 may be shared by all.

Next, the operation of this embodiment will be explained mainly regarding the electromagnets γ to 9.

If the air gap between the iron core 11 and the side surface of the guide rail 1 is a predetermined value, the ignition circuit 23,
24 controls the thyristors 21 and 22 at appropriate firing angles;
The coils 13 and 14 are energized so that the attraction forces of the electromagnets 7 and 8 are equal to each other.

In this state, Katoframe 3 moves up and down. Now, assuming that the gap between the side surface of the iron core 11 and the guide rail 1 has become narrower than a predetermined value (the gap between the side surface of the iron core 10 and the guide rail 1 has become wider), the gap detector 16 emits a corresponding output, The ignition circuits 23, 24 operate differentially with respect to each other to control the ignition angle of the thyristor 2L22, increasing the energization of the coil 13 and decreasing the energization of the coil 14.

That is, the attractive force of the electromagnet 7 is strengthened, and the attractive force of the electromagnet 8 is weakened.

As a result, the electromagnet γ approaches the guide rail 1,
The electromagnets 8 are moved apart and the respective air gaps are always kept constant.

The same applies to the electromagnets γA and 8A, so that the gap in the front-rear direction (up-down direction in FIG. 4) of the car room 4 is always kept constant.

The same applies to the electromagnets 9 and 9A, and the gap between the guide rails 1 and 1 of the car room 4 is always kept constant.

FIG. 6 shows another embodiment of FIG. 5, in which 25 is a diode and 21 and 22 are coils 13
, 14 in parallel.

In this embodiment, when the gap between the side surface of the iron core 11 and the guide rail 1 becomes narrow, the firing angle of the thyristor 21 is controlled to energize the coil 13. The biasing force is increased, and the firing angle of the thyristor 22 is controlled to weaken the biasing force of the coil 14.

FIG. 7 shows another embodiment of the present invention, in which electromagnets γ to 9,7A are attached to a car frame 3 having a roller guide 6 as shown in FIG.
~9A (however, electromagnet 7.γA is not shown).

In FIG. 1, electromagnets γ-9 and electromagnets γA-9A are mounted in the middle of the car frame 3 in the longitudinal direction <3a.

For example, there is a slight gap between the roller 6c and the top surface of the guide rail 1, and the gap between the iron core 12 and the top surface of the guide rail 1 is smaller than the gap between the roller 6c and the top surface of the guide rail 1. It is set widely.

The control circuit for this is the same as above.

(FIG. 5 or 6) When the power supply 20 is out of power, the coils 13 and 14 are deenergized and the air gap adjustment function is lost.

Therefore, the car frame 3 moves back and forth and left and right.

However, for example, when the upper left side of the car frame 3 moves toward the guide rail 1, the roller 6c comes into contact with the top surface of the guide rail 1, which prevents the iron core 12 from coming into contact with the top surface of the guide rail 1. It will be done.

This prevents damage to the iron core 12 and the guide rail 1 due to contact or sliding between them.

Figures 8 to 10 also show other embodiments of the present invention, and in Figure 9,
30 and 32 are capacitors, and 33 is a normally open contact of an electromagnetic contactor (not shown) which is deenergized when the car 4 is stopped or running at low speed and is energized in other cases.

The rest of the structure is the same as that in FIG. 7.

Coils 13-15 are connected in series with capacitors 30-32, respectively, forming a well-known series resonant circuit.

Therefore, if the inductance and capacitance are appropriately selected, the characteristics of the air gap versus attraction force as shown in FIG. 10 can be obtained.

That is, the horizontal axis in FIG. 10 represents, for example, the gap between the iron core 12 and the top surface of the guide rail 1, and the vertical axis represents the suction force.

The suction force is maximum when the gap is A, and the suction force decreases even if the gap becomes wider or narrower.

In this embodiment, a gap B defined by the roller 6c,
It is designed to be used within the gap C defined by the left roller 6d in FIG.

That is, as the gap between the iron core 12 and the top surface of the guide rail 1 becomes narrower, the suction force decreases, and as the gap widens, the suction force increases.

As a result, the car frame 3 is always automatically maintained at a point where the attractive forces of the electromagnets 9 and 9A are balanced.

The contact 33 is open when the car 4 is stopped or running at low speed.

This prevents the guide rail 1 from overheating due to the alternating magnetic flux of the electromagnets 7 to 9 and the like.

Since the frame 3 is guided by the roller guide 6 while the vehicle is stopped or running at low speed, there is no problem even if the electromagnets 7 to 9 do not operate.

As explained above, this invention provides a guide rail with electromagnets facing each other across a gap and a gap detector for detecting the gap, and reduces the attractive force of the electromagnet in the narrower gap, and reduces the attraction force in the narrower gap. Since the attraction force of the electromagnet is increased, each horizontal gap is always kept constant, making it possible to smoothly guide the car even at extremely high speeds and high lifts, resulting in a comfortable ride. can be improved.

In addition, a series resonant circuit is formed by an electromagnetic coil and a capacitor, and the above-mentioned attraction force is automatically adjusted according to the characteristics of this circuit, and the above-mentioned series resonant circuit is opened when the car is stopped or running at low speed. Therefore, a control device is not required, and the configuration can be simplified, and overheating that occurs in the guide rail during elm or low-speed running can be prevented.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional elevator car guiding device.
FIG. 2 is an enlarged cross-sectional view taken along the line ■-■ in FIG. 5 is a control circuit diagram of the electromagnet shown in FIG. 3, FIG. 6 is a circuit diagram of a control device showing another embodiment of the embodiment shown in FIG. 5, and FIG. This is a partially omitted front view showing an embodiment, and is a view corresponding to FIG. 3, and FIG.
FIG. 9 is a circuit diagram of the control device for the electromagnet shown in FIG. 8, and FIG. 10 is a diagram showing the attractive force characteristic curve of the electromagnet. 1... Guide rail, 3... Kago Waku, 7-9... Electromagnet, 10-12...
Iron core, 13-15... Coil, 16-18...
... air gap detector, 20 ... AC power supply, 21
, 22... Thyristor, 23° 24...
- In the ignition circuit, the same or equivalent parts in the figures are indicated by the same symbols.

Claims (1)

[Scope of Claims] 1. A guide rail constructed of a magnetic material, erected along the hoistway and facing the car; a plurality of electromagnets each having a coil energized by a power source, a gap detector provided in the cage to detect the gap, and an output of the gap detector to control the coil of the electromagnet to detect the gap among the electromagnets. A guiding device for an elevator car, comprising a control device that increases the suction force on the side where the gap is wider and decreases the suction force on the side where the gap is narrower. 2. A guide rail constructed of a magnetic material that is erected along the hoistway and facing the car, and is provided on the heel and faces the guide rail at a distance from the horizontal direction and engages with the guide rail. a guide body for regulating the position of said corner; a plurality of electromagnets each having a coil provided at said corner and facing said guide rail from the horizontal direction with a gap wider than said interval therebetween and each energized by an alternating current power supply; , a plurality of capacitors provided in the above-mentioned hook, the above-mentioned electromagnet and the above-mentioned capacitor are each connected in series, and the suction force of the above-mentioned electromagnet where the above-mentioned gap is widened is amplified, and the suction of the above-mentioned gap is narrowed. a series resonant circuit that reduces the force; a detection circuit that detects whether the car is stopped or running at low speed; and a series resonant circuit that is inserted between the AC power source and the series resonant circuit and when the detection circuit operates. An elevator car guide device comprising a contact point for disconnecting the AC power from the AC power source.