JP2001328779A - Guide device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise and vibration of a car and to improve comfortableness of the car by reducing exciting force applied on the car from bent of a guide rail or the like. SOLUTION: A guide device 24 includes two guide mechanisms 26. The guide mechanism 26 includes a guide lever 30 provided on an elevating body 12, a pivot support part 28 pivotally supporting the guide lever 30 on the elevating body 12, a guide part 32 moving along a guide rail 22, and an elastic support part 34 pivotally supporting the guide part 32 on the guide lever 30. The guide device 24 also includes a connection mechanism 36 connecting guide parts each other and a spring 42 pressing the guide part 32 toward each guide rail 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator apparatus, and more particularly to an elevator (eg, an elevator car, an elevator car, etc.) along a plurality of guide rails arranged along a hoistway of a building.
The present invention also relates to an elevator guide device for guiding an elevator car and a car frame provided outside the elevator car.

[0002]

2. Description of the Related Art FIG. 5 shows a part of an elevator apparatus 100. In this elevator apparatus 100, a car 102
And the car frame 104 holding the car 102 is the car frame 10
4, a plurality of guide rails 110 arranged on the hoistway 108 of the building via the guide mechanisms 106 provided on the upper, lower, left and right sides.
Is guided up and down freely. Guide mechanism 106
For example, as shown in FIG. 6, a base 112 fixed to the car frame 104, a horizontal arm 114 fixed to the base 112, A vertical arm 118 connected to a horizontal arm 114 by a horizontal pivot support point (pivot support shaft) 116 so as to be rotatable along a plane;
18 has a guide roller 122 supported via a support point (guide support point) 120, and a spring 124 for urging the guide roller 122 against the guide rail 110. Arm 118
(See Japanese Patent Application Laid-Open No. 11-35353).

As described above, in the conventional guide mechanism 106, the guide support point 120 of the guide roller 122 is disposed between the elastic support point 126 and the pivot support point 116. Therefore, the force F0 that the guide roller 122 receives from the guide rail 110 generates a reaction force F1 of the elastic support point 126 and a reaction force F2 of the pivot support point. And these reaction forces F1 and F2 are the car frame 104 and the car 1
Appears as 02 vibration.

[0004]

Therefore, the car frame 1
In order to reduce the vibrations of the car 04 and the car 102, it is necessary to reduce their reaction forces F1 and F2 as much as possible. For this purpose, first, it is conceivable to lower the spring stiffness at the support point 126. However, due to the deformation of the guide rail 110 and the eccentric load of the car 102,
Even if is tilted, the car 102 must not be brought into contact with the guide rail 110 or the door device at the landing, so that the spring rigidity cannot be significantly reduced.
The pivot support point 116 rigidly connects the vertical arm 118 and the horizontal arm 114. Therefore, a frequency component that greatly affects the vibration of the car frame 104 is transmitted to the car frame 104 with almost no attenuation, so that the vibration generated in the car frame increases. Specifically, the reaction force F1 generated at the elastic support point 126, the reaction force F2 generated at the pivot support point 116, and the resultant force F of these reaction forces
1 + F2 are shown in FIGS. 7A to 7C, respectively.

Accordingly, the present invention relates to an elevator guide device, in which a positional relationship between a guide support point, a pivot, and an elastic support point is minimized by a total reaction force (combined force) generated at the pivot support point and the elastic support point. Therefore, an object of the present invention is to reduce the exciting force transmitted to the car, suppress the vibration and noise of the car, and improve the riding comfort of the car.

[0006]

To achieve the above object, an elevator guide device according to the present invention is an elevator guide device for guiding an elevator body along two guide rails arranged on an elevator shaft. In the guide device,
(A) The guide device has two guide mechanisms respectively corresponding to two guide rails, and the guide mechanisms respectively move a guide lever provided on the elevating body and the guide lever with respect to the elevating body. A first support portion rotatably supported, a guide portion moving along the guide rail, and a second support point rotatably supporting the guide portion with respect to the guide lever; b) The guide device further includes a connecting mechanism that connects the guide portions of the two guide mechanisms to each other, and a biasing unit that biases the guide portions of the two guide mechanisms toward guide rails. It is characterized by having.

According to a second aspect of the present invention, in the elevator guide device, the first support portion is provided at the center of an impact acting on the guide lever from the guide rail.

Further, in the elevator guide device according to a third aspect of the present invention, the elevator includes a car and a car frame provided outside the car, and the first support portion is provided on the car frame. It is characterized by the following.

Further, the elevator guide device according to claim 4 is characterized in that the elevating body has a car and the first support is provided on the car.

[0010]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description and the accompanying drawings, the same reference numerals indicate the same or corresponding parts or portions.

(1) First Embodiment FIG. 1 shows a part of an elevator apparatus 10 having a guide device according to the present invention. In this figure, the elevating body 12 of the elevator apparatus 10 includes a car 14 and a car frame 16 provided around the car 14. The car frame 16 is the car 14
Has a vertical frame 18 arranged on the left and right sides. A guide device 24 for guiding the car frame 16 and the car 14 along left and right guide rails 22 arranged along the hoistway 20 is provided at an upper portion and a lower portion of the vertical frame 18. In FIG. 1, the lower guide device is not shown.

The guide device 24 has guide mechanisms 26 provided on the left and right vertical frames 18, respectively. Guide mechanism 26
Has a guide lever 30 rotatably attached to the vertical frame 18 via a pivot support point (first support portion) 28, which is a horizontal support shaft, as shown in FIG. The guide lever 30 extends upward from the pivot support point 28 and holds the guide portion 32 at the upper part. In addition, the guide part 32
Elastic support points (second support portions) 34, which are horizontal support shafts
And is rotatably connected to the guide lever 30 via the. In the present embodiment, a guide shoe that slides along the guide rail 22 is employed as the guide portion 32, but the present invention is not limited to the guide shoe.

The guide levers 30 of the left and right guide mechanisms 26
Are connected to each other by a connecting mechanism (rod) 36 at substantially the same height as the elastic support points 34. For example, when the upper end of the left guide lever 30 in the drawing moves to the right, it corresponds to this. Then, the right guide lever 30 on the drawing
Are moved in the same direction. The connecting mechanism 36 has a length adjusting mechanism 38 (see FIG. 1) so that the length of the connecting mechanism 36 can be adjusted. Further, in order to urge the guide lever 30 and the guide portion 32 toward the corresponding guide rails 22, a stopper 40 fixed to the connecting mechanism 36, a stopper 40 and the guide lever 30 are provided near both ends of the connecting mechanism 36. A spring 42 is provided between the guide rails 30 to bias the guide lever 30 and the guide portion 32 against the guide rail 22.

According to the guide device 24 configured as described above, when the car 14 and the car frame 16 move up and down along the guide rails 22, the car is guided through the guide portions 32 due to the bending or unevenness of the guide rails 22. Horizontal excitation force F is applied to frame 16
Acts. This excitation force F is converted into the displacement of the guide portion 32 and the guide lever 30, and a part thereof is absorbed by the deformation of the spring 42. The rest is transmitted to the coupling mechanism 36. The vibrating force transmitted to the connecting mechanism 36 is transmitted to the other guide mechanism 26 via the connecting mechanism 36, where the guide portion 32
Pressing force against the guide rail 22. The pressing force on the guide rail 22 appears as a reaction force (Fk) on the guide lever 30 on the side receiving the excitation force F.
That is, the exciting force F acting on the car frame 16 due to the bending of the guide rail 22 or the like is canceled as an action reaction of the left and right guide rails 22. On the other hand, another support reaction force Fh acts on the pivot support point 28, but the reaction force Fh is small. Therefore, the reaction force transmitted to the car 14 and the vibration generated in the car 14 are reduced.

(2) Embodiment 2 A structure for minimizing the total (Fk + Fh) of the reaction force Fk acting on the coupling mechanism 36 and the reaction force Fh at the pivot support point 28 will be described. The symbols used in the following description are defined as follows. Pf Position of the elastic support point 34 which is the point of application of the excitation force F. Pk, Ks The position of the support point where the guide lever 30 is elastically supported by the coupling mechanism 36 (the elastic support point 34), and the rigidity thereof. Pp, Kp The position of the pivot support point 28 where the guide lever 30 is pivotally supported by the car frame 16, and its rigidity. Although the pivot support point 28 is rigidly connected to the guide lever and the car frame 16, the support rigidity is temporarily set to Kp. m, Pg The mass of the movable part composed of the guide lever 30 and the guide part 32 and the position of the center of gravity. J Moment of inertia around the center of gravity of the movable part Lf Distance from the center of gravity Pg to the point of action Pf. Lk Distance from the center of gravity Pg to the elastic support point Pk. Lp Distance from center of gravity Pg to pivot support point Pp.

Using the above symbols, the guide lever 30
Is expressed by the following equations (1) and (2).

[0017]

Next, by subjecting the equations (1) and (2) to Laplace transform, the lateral displacement Xp at the pivot support point Pp is given by the following equations (3) to (6).

Xp (s) = X (s) + Lpθ (s) = [N ₁ (s) / D (s) + Lp (N ₂ (s) / D (s))] F (s) (3 ) Where D (s) ≡ [s ² J + (K ₁ Lk ₂ + KpLp ² )] [s ² m + (Ks + Kp)]-(KsLk-KpLp) ² (4) N1 (s) ≡s ² J + KkLk (Lk-Lt) + KpLp (Lp + Lt) (5) N2 (s) ≡-s ² mLf + Ks (Lk + Lf) -Kp (Lp + Lf) (6)

From the above, with respect to an arbitrary fluctuation of the exciting force F,
From the equation (3), it can be seen that the following equation (7) should be satisfied in order to minimize the lateral displacement Xp at the pivot support point Pp.

N1 (s) ≡D (s) + Lp (N ₂ (s)) / D (s) ≡0 (7)

Here, from equations (4) to (6), the necessary and sufficient conditions for satisfying equation (7) are as follows.

J-mL _f L _p = 0 & L _k + L _p = 0 (8) or J-mL _f L _p = 0 & L _k -L _p = 0 (9)

Here, equation (8) represents the pivot support point Pp
And the elastic support point Pk. However, when the two spring stiffnesses Ks and Kp are low, it is difficult to stably support the car with respect to the torsional force received from the guide rail with a guide structure that can make the pivot support point Pp and the elastic support point Pk coincide. is there. Therefore, in the present invention, a structure of the guide device that has the same effect as the structure that satisfies the expression (8) for completely elastically supporting and satisfies the condition of the expression (9) that is more feasible is considered.

From equation (9), to minimize the lateral displacement Xp at the pivot support point Pp with respect to the variation of F, the point of action Pf of the force and the elastic support point Pk are determined by the excitation force 41. And the distance Lp from the pivot support point Pp to the center of gravity Pg of the guide rail 22 is Lp = −
J / m · Lf may be used. The point at which the lateral displacement Xp generated by the excitation force F and the rotational displacement θ cancel each other and the lateral displacement Xp is displaced is referred to as the impact center with respect to the force application point Pf. In an ideal case where no friction or the like acts at all, the supporting reaction force becomes zero at this point.

The mass M of the guide lever 30, the moment of inertia around the center of gravity is J, and the distance from the center of gravity to the point of application of the force is L.
Assuming that k, the impact center position Lp is given by the following equation (10).

Lp = J / M / Lk (10)

FIG. 3 is a diagram showing a change in reaction force acting on each part when the pivot support point 28 in the elevator guide device 24 of the second embodiment is displaced from the position of the center of impact. Here, FIG. 3A shows the elastic support points 34 (P
3B shows a change in the reaction force Fk acting on the pivot support point 28 (Pp), and FIG.
(C) shows a change in the reaction force Fk + Fp acting on the entire guide device. In the figure, Lp ′ is the pivot support point 28
The value when (Pp) is shifted from the ideal impact center is shown. Lp ′ = 0.5 * Lp corresponds to the pivot support point 28 (P
The case where p) was adjusted to the ideal impact center is shown.

FIG. 3A shows a pivot support point 28.
It shows that even if (Pp) is shifted from the center of impact, the reaction force Fk acting on the elastic support point Pk does not change. This is because the elastic support point 34 (Pk) is supported by the connecting mechanism 36,
This is because the exciting force due to the displacement of the guide rail 22 is canceled. FIG. 3B shows the pivot support point 28 (Pp) when the pivot support point 28 (Pp) is aligned with the ideal center of impact.
This indicates that the reaction force Fp acting on p) becomes zero, and the larger the amount of deviation from the ideal center of impact becomes, the larger the reaction force Fp becomes. FIG. 3C shows that the sum of Fk + Fp becomes smaller when the pivot support point 28 (Pp) is set to the ideal center of impact. According to the ideal guide device according to the second embodiment,
Compared to the supporting reaction force acting on the conventional guide device, the peak
It is reduced to about 1/6 in the two peak value [FIG.
7 (a) to 7 (c) corresponding to FIG. 3 (c)].

According to the second embodiment, the support reaction force Fh at the pivot support point 28 becomes zero. Therefore, the elastic support point 34 bears a larger reaction force, but since the elastic support point 34 is connected to the connecting mechanism 36, the exciting force due to the displacement of the guide rail 22 is canceled, and the pivot support point 34 The support reaction force Fk does not change with respect to the deviation amount from the ideal impact center of No. 28.

As described above, according to the guide device of the second embodiment, the support reaction force at the pivot support point 28, which is rigidly supported against lateral displacement, is reduced to zero,
Support reaction force generated as a whole guide device can be minimized,
Further, since the exciting force having the high frequency component transmitted from the pivot support point 28 to the car 14 can be removed, the vibration and noise generated in the car 14 can be reduced.

(3) Third Embodiment FIG. 4 shows an elevator apparatus 10A including a guide device 24 according to a third embodiment. Elevator device 10A shown in FIG.
Has a monocoque structure in which the car frame is eliminated and the guide device 24 is directly attached to the car 14 in the first embodiment.
Is different from the elevator apparatus 10 of FIG. Therefore, the weight of the elevator (car 14) in the elevator apparatus 10 is lighter than the weight of the elevator of the embodiment. Therefore, the lifted body that is reduced in weight is largely displaced in accordance with the reaction force Fk acting on the elastic support point and the reaction force Fp acting on the pivot support point 28, and the vibration and noise of the car tend to increase. Therefore, the connecting mechanism 36 is provided in the car 14 according to the third embodiment, or the pivot support point 28 is arranged at the center of impact. As a result, vibration and vibration
An elevator apparatus having a monocoque structure with low noise can be obtained.

[0033]

As described above, according to the elevator guide apparatus of the present invention, the shocking excitation force acting on the guide mechanism due to the displacement of one guide rail becomes a support reaction force and becomes the other. Act on the guide rail. Therefore, the above-described excitation force itself is canceled by the acting force / reaction force of the left and right guide rails. Further, a slight reaction force is generated at the first support portion (the pivot support point), but the reaction force itself is small, and the vibration and noise applied to the car are extremely small.

Further, by setting the first support portion as the center of the impact acting on the guide lever from the guide rail, the reaction force acting on the first support portion (pivot support point) becomes substantially zero, and the first support portion acts on the car. Shock, vibration and noise are further reduced.

Further, a first support portion (a pivot support point)
Even in the case of a guide device provided on a car, impact, vibration and noise acting on the car can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a partial front view of an elevator apparatus including an elevator guide apparatus according to a first embodiment.

FIG. 2 is a partially enlarged front view of the elevator guide device of the first embodiment.

FIG. 3 is a graph of forces (excitation force, reaction force) acting on the elevator guide device of the first embodiment.

FIG. 4 is a front view of an elevator guide device according to a third embodiment.

FIG. 5 is a front view of an elevator apparatus including a conventional elevator guide apparatus.

FIG. 6 is a side view of a conventional elevator guide device.

FIG. 7 is a graph of forces (excitation force, reaction force) acting on a conventional elevator guide device.

[Explanation of symbols]

10 elevator equipment, 12 elevators, 14 cars, 1
6 car frames, 20 hoistways, 22 guide rails, 24
Guide device, 26 guide mechanism, 28 pivot support point (first support portion), 30 guide lever, 32 guide portion, 36 coupling mechanism, 42 spring

Claims (4)

[Claims] 1. An elevator guide device for guiding an elevating body along two guide rails arranged on an elevator hoistway, wherein (a) the guide device has two guide mechanisms respectively corresponding to the two guide rails. A guide lever provided on the elevating body, a first support portion rotatably supporting the guide lever with respect to the elevating body, and moving along the guide rail. A guide portion; and a second support point for rotatably supporting the guide portion with respect to the guide lever. (B) The guide device also includes a guide portion for the two guide mechanisms. An elevator, comprising: a coupling mechanism for coupling; and urging means for urging the guide portions of the two guide mechanisms toward guide rails. Guide device. 2. The elevator guide device according to claim 1, wherein the first support portion is a center of an impact acting on the guide lever from the guide rail. 3. The car frame according to claim 2, wherein the lifting body has a car and a car frame provided outside the car, and the first support portion is provided on the car frame. Elevator guide device. 4. The elevator guide device according to claim 2, wherein the elevator body has a car, and the first support portion is provided on the car.