JPH11349257A - Elevator having mechanism for damping vibration of compensation sheave - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator having little vertical vibration by improving the damping effect of vertical vibration of a compensation sheave. SOLUTION: A sheave support 2a for rotatably support a compensation sheave 2 is vertically movably attached to a guide rail 3 erected on the lower part of a hoistway. A base 8 is fixed to the guide rail 3 below the sheave support 2a. The base 8 and the sheave support 2a are connected to each other through liquid sealed dampers 7 to damp vibration of the compensation sheave 2 in relation to the base B. Since the compensation sheave 2 can be efficiently braked by the liquid sealed dampers 7, and comfortableness of a car is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator provided with a device for damping vibration of a compensive for suppressing vertical vibration of a car.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing an example of a conventional rope traction type 1: 1 single lap type elevator.

In FIG. 5, a machine beam 24 is fixed horizontally to a building wall (not shown) above a hoistway 18 formed vertically in a section of a building.
Is provided with a hoisting machine 19.

An electric motor 20 is fixed to the hoisting machine 19,
A sheave 22 is attached to the electric motor 19. A main rope 26 is wound around the sheave 22, and a car (ride car) 29 is suspended via a car frame 30 at one end (the lower right end in FIG. 5) of the main rope 26.

The other end of the main rope 26 (the left side in FIG. 5)
A counterweight 27 is suspended via the deflecting sheave 25. The counterweight 27 is connected to the hoistway 1 via guide rollers (not shown) provided at the upper and lower ends thereof.
The guide rails 8 are guided by a pair of guide rails 28 provided vertically.

Similarly, a pair of guide rails 23 are provided vertically on the hoistway 18, and the car frame 30 moves up and down the hoistway 18.
Are guided by guide rollers (not shown) that are pressed and rolled by guide rails 23 mounted above and below the car frame 30.

In the elevator configured as described above, the counterweight 27 has a weight corresponding to a load within the rating mounted on the car 29, for example, 40% to 60% of the rating. The car 29 and the counterweight 27 are operated in a sliding manner along the guide rails 23 and 28, respectively, due to friction between the sheave 22 and the main rope 26.

When the car 29 is located above and below the hoistway 18, the length of the main rope 26 on the side of the car 29 and the weight 27 is unbalanced. A compensating rope 1 and a compensive 2 are provided in order to prevent a situation in which the loads on both sides fluctuate.

The compensating rope 1 is for maintaining a dynamic balance with the main rope. This compen rope 1
Has one end locked to the lower end of the car 29 via the car frame 30, and the other end locked to the lower end of the counterweight 27. The compensive 2 guides the compens rope 1 so that the compens rope 1 moves smoothly and gives tension to the compens rope 1, and is hung on the compens rope 1.

FIG. 6 is an enlarged view of the compensive section shown in FIG. As shown in FIG. 6, the compensive sheave 2 is rotatably attached to a frame 2a (sheave support) via a rotating shaft (not shown). Frame 2
A guide shoe 4 is attached to a, and the compensive sheave 2 is guided by a compensating rail (guide rail) 3 via the guide shoe 4.

The guide shoe 4 is provided with a spring 5 for pressing the guide shoe 4 and a bolt 6 for adjusting the pressing force. The guide shoe 4 generates friction by pressing the guide shoe 4 against the compensating rail 3 with an appropriate force. Thus, the vertical vibration of the compensive 2 is attenuated, thereby suppressing the vertical vibration of the elevator car 29.

[0012]

However, if the resistance of the movement of the compensive 2 is merely given by the frictional force acting between the compensating rail 3 and the guide shoe 4 as in the conventional apparatus, the vibration damping effect is small. There is a problem that the vertical vibration of the car cannot be completely suppressed.

The present invention has been made to solve the above problems, and provides a vibration damping mechanism capable of more effectively suppressing vibration of a compensive and a compensating rope. The purpose is to improve.

[0014]

In order to achieve the above object, the present invention provides a car and a counterweight suspended by a main rope hung on a sheave, and a compensating rope connected to the car and the counterweight. An elevator equipped with a compensive rope on which the compensating rope is hung, a guide rail, a base attached to the guide rail, and a rotatable support for the compensive sheave. A sheave support movably provided with respect to the base and displaceable with respect to the base, and a damping element provided between the base and the sheave support and damping vibration of the compensive with respect to the base. Provide elevator equipped with.

The base can be vertically movably attached to the guide rail via a sliding member that provides resistance to movement of the base relative to the guide rail by frictional force. In addition, it is also possible to attach the base to the guide rail immovably.

Further, it is possible to further comprise a pressing mechanism capable of adjusting a force for pressing the sliding member against the guide rail. In this case, the pressing mechanism acts between the sliding member and the guide rail. The maximum static friction force can be set to be larger than the maximum damping force of the damping element.

[0017] When the displacement of the compensive with respect to the base exceeds a predetermined amount, the displacement of the compensive with respect to the base is provided between the sheave support and the base. May be configured to further include an elastic member that moves the.

Further, it is possible to further comprise a stopper for limiting the displacement of the compensive with respect to the base and for moving the base when the displacement of the compensive with respect to the base exceeds a predetermined amount. .

Further, the sheave support can be vertically movably mounted on the guide rail via a sliding member that gives resistance to the movement of the sheave support relative to the guide rail by frictional force.

The damping element may be constituted by a liquid ring damper or a friction damper.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. In addition, the following first to fourth
The elevator of the embodiment is different from the conventional elevator,
The only difference is that the configuration of the compensive unit shown in FIG. 6 is replaced with any of the configurations of FIGS. 1 to 4, and the configuration of the other parts is the same as the configuration of the conventional elevator. Therefore,
In the description of each embodiment, only the configuration of the compensive unit will be described.

[First Embodiment] First, a first embodiment will be described with reference to FIG.

In FIG. 1, reference numeral 1 denotes a compensating rope (also referred to as a balancing rope) which is engaged with a lower end of a car frame and a lower end of a weight to maintain dynamic balance with the main rope, and reference numeral 2 denotes a control rope. This is a compensive (also referred to as a balancing rope tensioner) for guiding the compens rope 1 so that the pen rope 1 moves smoothly and for giving tension to the compens rope 1.
The compensive 2 is hung on the compensating rope 1.

The compensive sheave 2 is rotatably mounted on a frame 2a (sheave support) via a rotating shaft (not shown). The frame 2a is guided by a guide rail (compensation rail) 3 erected at the lowermost part of the hoistway, and is vertically movable. A guide shoe 4 is attached to the frame 2a. The frame 2a is connected to a compensating rail (guide rail) 3 via the guide shoe 4.
Guided by The guide shoe 4 is provided with a spring 5 for pressing the guide shoe 4 and a bolt 6 for adjusting the pressing force. The guide shoe 4 is pressed against the compensating rail 3 with an appropriate force to generate friction, and The vertical vibration of the pen sheave 2 is attenuated.

A damper mounting base (hereinafter referred to as "base") 8 is fixed to the guide rail 3 below the frame 2a so as not to move. The frame 2 a movably attached to the guide rail 3 is displaceable with respect to a base 8 fixed to the guide rail 3.

Between the base 8 and the frame 2a, there is provided a liquid ring damper (damping element) 7 for suppressing displacement of the frame 2a with respect to the base 8 to attenuate vibration. The liquid seal damper 7 has its cylinder side fixed to the base 8 and its rod side fixed to the frame 2a.

During normal operation of the elevator, the compensive 2 can move up and down along the compensating rail 3 as the elevator travels. On the other hand, the base 8 is fixed to the guide rail 3 and does not move up and down. The liquid ring damper 7 functions to attenuate the amplitude of the relative displacement between the compensive 2 and the base 8.

According to the present embodiment, the action of the liquid seal damper 7 acting to suppress the relative displacement between the compensive sheave 2 and the base 8 causes the eccentricity of the main sheave and the expansion and contraction of the main rope. Since the vibration of the compensating rope 1 and the compensive sheave 2 caused by the vertical vibration of the car caused by the car can be more effectively attenuated, the vertical vibration of the car can be effectively suppressed.

The guide shoe 4 provided on the frame 2a also contributes to the damping of the vibration of the compensive 2. Therefore, it is preferable to provide the guide shoe 4,
If the damping force of the liquid ring damper 7 is sufficiently high, it is not always necessary to provide the damping force.

As the damping element, another type of damper such as a friction damper can be used instead of the liquid ring damper 7.

[Second Embodiment] Next, a second embodiment will be described with reference to FIG. In the second embodiment,
It differs from the first embodiment in that the base 8 can be moved with respect to the guide rail 3, and the other configuration is substantially the same as that of the first embodiment. In the second embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

While the base 8 is fixed to the guide rail 3 in the first embodiment, in the present embodiment, the base 8 is guided by the guide rail 3 and can move up and down. I have. A guide shoe 9 is provided on the base 8. The guide shoe 9 is provided with a pressing mechanism including a pressing spring 10 and an adjusting bolt 11.

During normal running of the elevator, the frictional force acting between the guide shoe 9 of the base 8 and the guide rail 3 prevents the base 8 from moving up and down. The pressing force of the guide shoe 9 is adjusted by the spring 10 and the bolt 11 so as to be larger than the force. As a result, the base 8 becomes immovable with respect to the guide rail 3, so that the vibration of the car can be suppressed as in the first embodiment.

When the compensive sheave 2 is displaced due to expansion and contraction of the compensope 1 (due to aging), the holding force (frictional force) of the guide shoe 9 is adjusted to be smaller than the weight of the compensive sheave 2. By base 8
To restore the positional relationship between the compensive 2 and the base 8 to the initial state.

That is, according to the present embodiment, the adjustment work becomes easy even when the length of the compensating rope 1 changes.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the second embodiment in that an elastic member for limiting the relative displacement between the base 8 and the frame 2a is further provided, and the other is substantially the same as the second embodiment. It has the same configuration. In the third embodiment, the same parts as those in the second embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

In this embodiment, as shown in FIG. 3, the base 8 includes springs 12a and 12b and springs 12a.
A spring receiver 13 and a spring receiver 14 for the spring 12b are provided.

The spring receiver 13 comprises a pair of U-shaped spring receiving elements 13a and 13b attached to the base 8 and the frame 2a, respectively. As shown in FIG. 3, the terminal on the base 8 side of the spring 12a is the frame 2a.
The end of the spring 12a on the frame 2a side is supported by a spring receiving element 13a attached to the base 8.

With this configuration, the spring 12
a acts to limit the movement of the base 8 and the frame 2a of the compensive 2 in the direction away from each other, and the spring 12b causes the base 8 and the frame 2a of the compensive 2 to approach each other. Acts to restrict movement in the direction.

Incidentally, with the provision of the springs 12a and 12b, the rod of the liquid ring damper 7 can be attached to the frame 2a via the connecting member 15.

Next, the operation will be described. The operation of the elevator during normal traveling is the same as in the second embodiment.

When the compensive 2 is suddenly displaced during an emergency or inspection, that is, when the compensive 2 jumps up, the distance between the compensive 2 and the base 8 changes rapidly. Although there is a possibility that the sealing damper 7 may be broken, according to the present embodiment, the base 8 is displaced up and down by a spring force before the gap between the compensive 2 and the base 8 changes suddenly. In addition, breakage of the liquid ring damper 7 can be prevented.

[Fourth Embodiment] Next, a fourth embodiment will be described with reference to FIG. In a fourth embodiment,
The third embodiment is different from the third embodiment in that a stopper member for limiting the relative displacement between the base 8 and the frame 2a is further provided, and the other configuration is substantially the same as that of the third embodiment. I have. In the fourth embodiment, the same portions as those in the third embodiment are denoted by the same reference numerals, and overlapping description will be omitted.

In this embodiment, a bolt 16a and a nut 16 screwed with the bolt 16a are attached to the base 8.
A stopper 16 composed of b and 16c is attached. The bolt 16a of the stopper 16 is connected to the connecting member 15
Is inserted through the hole formed in the hole. The nuts 16b and 16c are fixed to the bolt 16a with the connecting member 15 interposed therebetween, and the relative displacement amount of the frame 2a with respect to the base 8 is a predetermined value (specifically, the displacement amount at which the liquid ring damper 7 may be damaged). Is exceeded, the nuts 16b and 16c come into contact with the connecting member 15.

Next, the operation will be described. The operation of the elevator during normal running is the same as in the second and third embodiments.

According to this embodiment, at the time of emergency or inspection,
When a sudden displacement of the compensive 2 occurs, the spring 1
Even if the base 8 does not move up and down in the operations of 2a and 12b, if the relative displacement amount between the base 8 and the frame 2a exceeds a predetermined value, the base 8 is pulled up by the action of the stopper 16 or Press down, base 8 and frame 2
The relative displacement with respect to a can be prevented from increasing any more.

According to the present embodiment, the protection of the liquid ring damper 7 is more thorough.

[0048]

According to the present invention, the effect of damping the vertical vibration of the compensive can be enhanced, so that an elevator with less vertical vibration can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of an elevator according to the present invention, showing a configuration of a compensive unit.

FIG. 2 is a view showing a second embodiment of the elevator according to the present invention, and is a view showing a configuration of a compensive section.

FIG. 3 is a view showing a third embodiment of the elevator according to the present invention, and is a view showing a configuration of a compensive section.

FIG. 4 is a view showing a fourth embodiment of the elevator according to the present invention, showing a configuration of a compensive part.

FIG. 5 is a configuration diagram of a conventional elevator.

FIG. 6 is a detailed view showing a configuration of a compensating section of a conventional elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compensation rope 2 Compensive 3 Guide rail (compensation rail) 7 Liquid seal damper 8 Base 9 Guide shoe (sliding member) 10, 11 Pressing mechanism (spring and bolt) 12a, 12b Elastic member (spring) 16 Stopper 27 Balancing weight 29 basket (riding basket)

Claims (9)

[Claims] An elevator comprising a car and a counterweight suspended by a main rope hung on a sheave, a compen rope connected to the car and the counterweight, and a compensive on which the compen rope is hung. , A guide rail, a base attached to the guide rail, and rotatably supporting the compensive, provided vertically movable by being guided by the guide rail,
A sheave support displaceable with respect to the base; and a damping element provided between the base and the sheave support, and attenuating vibration of the compensive with respect to the base. Elevator. 2. The apparatus according to claim 1, wherein said base is vertically movably mounted on said guide rail via a sliding member for providing resistance to movement of said base relative to said guide rail by frictional force. 2. The elevator according to 1. 3. The elevator according to claim 2, further comprising a pressing mechanism capable of adjusting a force for pressing the sliding member against the guide rail. 4. The apparatus according to claim 3, wherein a maximum static friction force acting between said sliding member and said guide rail is set to be larger than a maximum damping force of said damping element.
An elevator according to claim 1. 5. When the displacement of the compensive with respect to the base exceeds a predetermined amount, the displacement of the compensive with respect to the base is limited between the sheave support and the base. 3. The apparatus according to claim 2, further comprising: an elastic member for moving the member.
The elevator according to any one of claims 1 to 4. 6. A stopper for restricting displacement of the compensive with respect to the base and moving the base when displacement of the compensive with respect to the base exceeds a predetermined amount. An elevator according to any one of claims 2 to 4. 7. The sheave support is vertically movably attached to the guide rail via a sliding member that gives a resistance to the movement of the sheave support relative to the guide rail by frictional force. The elevator according to any one of claims 1 to 6, wherein 8. An elevator according to claim 1, wherein said damping element comprises a liquid ring damper. 9. An elevator according to claim 1, wherein said damping element comprises a friction damper.