JPH08231154A - Elevator car - Google Patents

Abstract

PURPOSE: To facilitate adjustment of a damper for damping low frequency vibration transmitted from a main wire. CONSTITUTION: Coil springs 9, 9 are arranged longitudinally at a leaf spring 6 so that they may hold rods 5, 5, 5 which penetrate the leaf spring 6 and support the same at its central part. Upper ends of these coil springs 9, 9 are fixed to an upper beam 1a by means of spring seats 10 while lower ends thereof are fixed to the leaf spring 6 by means of spring seats 10. Slotted holes extending in the longitudinal direction are provided for the leaf spring 6 and the upper beam 1a to make adjustable the position of the spring seat 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rope elevator car, in particular.

[0002]

2. Description of the Related Art FIG. 5 is an explanatory view showing a schematic structure of a conventional single-lap type rope elevator, and FIG. 6 is a partial plan view of FIG. In FIG. 5 and FIG. 6, a machine beam made of a shaped steel material is provided on the upper surface of a floor 20 provided in a machine room 18 formed above an elevator hoistway 19.
21 is installed, and a hoisting machine 22 is installed on the upper surface of the machine beam 21 via a machine bed.

A driving electric motor 27 is attached to the hoisting machine 22 via a mounting leg projecting like a cantilever on the rear side surface, and the output shaft of the electric motor 27 is coupled via a coupling 27a. An input shaft of a speed reducer (not shown) is connected. A non-excitation actuated disc brake 28, not shown in detail, is attached to the front side of this speed reducer in FIG.

The hoisting machine 22 is provided with a main sheave 23 at the end of the output shaft projecting forward from the left side of the hoisting machine 22, and a plurality of main ropes 24 are wound on the main sheave 23. It is equipped. At the lower end on one side of this main rope 24, a car 25 is shown in FIG.
Suspended as shown in, the lower end of the other end of the main rope 24,
A counterweight 26 is suspended.

In the thus constructed elevator, the electric motor 27 is speed-controlled and accelerated / decelerated by an inverter power source (not shown) installed in the machine room 18, and the car 25 is stopped at a predetermined floor.

Next, FIG. 7 is a front view showing the car 25 shown in FIG. In FIG. 7, between the upper ends of the vertical steel frame 1c vertically symmetrically provided on the left and right of the car frame 1a,
A pair of upper beams 1b made of channel steel are horizontally installed in parallel,
Both ends are fixed to the side surface of the vertical frame 1c with bolts.

A pair of lower beams 1d made of channel steel are horizontally provided between the lower ends of the pair of vertical frames 1c, and both ends thereof have vertical frames 1c.
It is fixed to. Anti-vibration rubber 13 is fixed to the left and right of the upper surface of the pair of lower beams 1d, and the car 2 is mounted on the upper surfaces of the anti-vibration rubber 13.

A main rope 3 is provided between the central portions of the pair of upper beams 1b.
A rope socket 4 fixed to the lower end of the rope socket and a rod 5 whose upper end is fixed to the lower end of the rope socket 4 are vertically suspended. The main ropes 3 are fastened with wooden cleats 3a, and the distance between them is maintained.

A support plate 8 is attached to the lower surface of the center portion of the pair of upper beams 1b and is fixed to the upper beams 1b by bolts.
Each rod 5 described above penetrates through the supporting plate 8, and a coil spring 7 is loosely fitted to the lower side of the supporting plate 8 on each rod 5.

At the lower ends of these coil springs 7, spring washers and nuts are inserted into the rods 5, of which the nuts are doubly screwed together to prevent loosening. Each coil spring 7 is compressed by the load of the car 25.

In the elevator car constructed as described above, the high frequency vibration transmitted from the reducer of the hoisting machine to the car 25 through the main ropes 3 is reduced by the coil spring 7 and the internal vibration of the car is reduced. It reduces passenger discomfort.

However, since low-frequency vibration cannot be absorbed by the coil spring 7, a vibration absorber as shown in FIG. 8 is attached to the lower end of the compression coil spring 7. That is, the lower end of each coil spring 7 has a rod 5 coaxial with each coil spring 7.
A leaf spring 6A whose lower end penetrates is provided in parallel with the upper beam 1b.

At both ends of the leaf spring 6A, an upper end of a shaft rod 12 having threads formed at upper and lower ends penetrates and is fixed to the leaf spring 6A by a nut. A weight receiving plate (not shown) is attached to the lower end of the shaft rod 12, and is fixed by a nut inserted in the lower end of the shaft rod 12.

On the weight receiving plate, a thick disk-shaped weight 11 is shown in FIG.
There are 5 of them. A groove into which the shaft rod 12 is inserted is formed in the weight 11, and the outer periphery is supported by a plurality of auxiliary rods (not shown) provided upright on the outer periphery of the weight receiving plate.

In an elevator car equipped with such a vibration absorber, the low-frequency vibration propagated from the hoisting machine to the lower ends of the rods 5 through the main ropes 3 is transmitted to the leaf springs 6A, and the vibrations are transmitted. The transmission to the car 25 is prevented by the vertical vibration of the leaf spring 6A which vibrates. for that reason,
The leaf spring 6A and the weight 11 are designed and manufactured so that the natural frequency of the vibration absorber composed of the leaf spring 6A and the weight 11 matches the low-frequency excitation frequency.

[0016]

However, according to the result of the adjustment test at the time of installing the elevator, the frequency transmitted from the hoisting machine may not completely match the natural frequency of the vibration absorber. The number of 11 is changed and the difference from the design value is adjusted.

The adjustment work of the weight 11 is carried out by removing the auxiliary rod erected on the outer circumference of the weight receiving plate from the upper beam 1b and the car 2.
Since it has to be done in a narrow space between, workability is poor and it takes time.

Further, as a result of this adjustment work, the excess weight 11 has to be discarded and therefore is wasted. Furthermore, this adjustment work must be performed within a limited time due to other construction of the building in which the elevator is installed and the elevator installation and adjustment work. Then, the objective of this invention is to obtain the elevator car which can adjust a vibration absorber easily and in a short time.

[0019]

In the elevator car according to the first aspect of the present invention, a buffer spring is inserted between the lower part of the rod of the main rope that penetrates the upper beam of the car and the upper beam, It is characterized in that a weight is suspended at both ends of a leaf spring supported by the lower end of the plate spring, and an elastic member is interposed between the weight of the leaf spring and the rod.

In the elevator car according to the second aspect of the present invention, a buffer spring is inserted between the lower portion of the rod and the upper beam of the main rope that penetrates the upper beam of the car and is attached to the lower end of the rod. The plate spring is supported by the central portion of the spring receiving plate, the weight is suspended at both ends of the plate spring, and the elastic member is interposed between the weight of the plate spring and the spring receiving plate and between the upper beams. Characterize.

Further, in the elevator car according to a third aspect of the present invention, a support member is constituted by a spring seat having an upper end fixed to the upper beam and the leaf spring, and a coil spring inserted between the spring seat. Is configured.

[0022]

In the elevator car using such means, the natural frequency of the leaf spring can be adjusted by moving the support member in the longitudinal direction of the upper beam and the leaf spring.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an elevator car according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a first embodiment of an elevator car according to the present invention, and is a view corresponding to FIGS. 7 and 8 shown in the prior art.

1 is substantially different from FIG. 8 in that a coil spring 9 and a pair of coil springs 9 are loosely fitted between the left and right of the leaf spring 6 for vibration absorption and the upper beam 1b. Others are the same as FIG. 8 except that the spring seat 10 of FIG. Therefore, the same elements as those in FIG. 8 are designated by the same reference numerals and the description thereof will be omitted.

That is, the leaf spring 6 is made of a material whose plate thickness is slightly thicker than that of the leaf spring 6A shown in the prior art. In order to adjust the frequency of the transmitted low frequency, as shown in FIG. 3 showing a partial bottom view of FIG. 1, an elliptical hole 6a for adjusting the position of a coil spring 9 described later is formed. Has been done.

Similarly, an oval hole having the same shape as the oval hole 6a is also provided in the central portion of a spring support plate (not shown) attached to the lower surfaces of the pair of upper beams 1b.
The spring seat 10 is inserted from the inside into these oblong holes. A compression coil spring 9 having a wire diameter slightly smaller than that of the compression coil spring 7 is loosely fitted in the spring seat 10.

The male screw portion on one side of the spring seat 10 on the small diameter side is fixed to the leaf spring 6 by a nut screwed to the male screw portion. On the other hand, the male thread on the other side of the spring seat 10 is screwed onto the end of the compression coil spring 9.

In an elevator car in which such a vibration absorber is incorporated, when adjusting the natural frequency of the leaf spring 6 at the time of installation, loosen the nuts screwed to the upper and lower ends of the spring seat 10 and slightly move it to the left. Alternatively, the spring seat 10 is moved to the right.

Therefore, since it is not necessary to remove or attach the weight 11 in a narrow space between the upper beam 1b and the car, not only the leaf spring 6 can be easily adjusted, but also the conventional method. There is no need to discard the surplus weight. It should be noted that a plurality of elliptical holes 6a for adjusting the natural frequency shown in FIG. 3 may be formed in the longitudinal direction of the leaf spring 6 so as to be shared with the leaf spring for vibration absorption used in cars of different ratings.

Next, FIG. 4 is a partial front view showing a second embodiment of the elevator car of the present invention, and is a view corresponding to FIG. 4 is different from FIG. 1 in the fixing structure of the central portion of the spring plate 6, and is otherwise the same as FIG.

That is, in FIG. 4, the spring receiving plate 30 is inserted from the lower side to the lower end of each rod 5 and is fixed with a nut. A substantially T-shaped support fitting 17 is fixed to the lower surface of the central portion of the spring receiving plate 30 with bolts.

A through hole penetrating in the left-right direction is formed in the support fitting 17 with respect to a portion vertically provided at the center. The plate spring 6 is inserted into this through hole, and the support metal fitting 17
Is pressed by a set screw screwed from the lower end. As a result, both ends of the leaf spring 6 can swing about the through hole of the support fitting 17 as a fulcrum. Even in the elevator car configured as described above, the low-frequency vibration transmitted to the leaf spring 6 can be attenuated by vibrating the leaf spring 6.

[0033]

As described above, according to the invention of claim 1,
A buffer spring is inserted between the lower part of the rod of the main rope that penetrates the upper beam of the car and the upper beam, and the weight is suspended at both ends of the leaf spring supported by the lower end of the rod. By providing an elastic member in the middle part, this elastic member can be moved in the longitudinal direction of the upper beam and the leaf spring, and the natural frequency of this leaf spring can be adjusted. Therefore, the vibration absorber can be adjusted easily and in a short time. You can get an elevator car that can be done in.

According to the second aspect of the present invention, a buffer spring is inserted between the upper beam and the lower part of the rod of the main rope that penetrates the upper beam of the car, and the buffer spring is attached to the lower end of the rod. A spring bearing plate that supports the lower end of the leaf spring is provided, and the center portion of the leaf spring is supported by the center portion of this spring bearing plate. By providing the member, the elastic member is moved in the longitudinal direction of the upper beam and the leaf spring, and the natural frequency of the leaf spring can be adjusted, so that the vibration absorber can be easily adjusted in a short time. You can get an elevator car.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of an elevator car according to the present invention.

FIG. 2 is a partially enlarged detailed view of FIG.

FIG. 3 is a bottom view of FIG. 2;

FIG. 4 is a front view showing a second embodiment of the elevator car according to the present invention.

FIG. 5 is a diagram showing an example of a hoistway in which a conventional elevator car is suspended.

FIG. 6 is a plan view of FIG.

FIG. 7 is a front view showing an example of a conventional elevator car.

FIG. 8 is a partial front view showing an example of a conventional elevator car different from FIG. 7.

[Explanation of symbols]

1 ... Basket, 3 ... Main rope, 4 ... Rope socket, 5 ... Rod, 6 ... Leaf spring, 7, 9 ... Compression coil spring, 8 ... Support plate, 10 ... Spring seat, 11 ... Weight, 12 ... Shaft, 13 ... Anti-vibration rubber,
14 ... Spring washer, 17 ... Support bracket, 30 ... Spring receiving plate.

Claims (3)

[Claims] 1. A buffer spring inserted between a lower portion of a rod of a main rope penetrating an upper beam of a car and the upper beam, and a leaf spring supported by a lower end of the rod and having weights attached to both ends thereof. An elevator car including elastic members vertically provided between the upper beam and both sides of the rod of the leaf spring. 2. A buffer spring inserted between a lower portion of a rod of a main rope penetrating an upper beam of a car and the upper beam, a spring bearing plate supported by a lower end of the rod, and the spring bearing plate. An elevator car including a leaf spring supported by the plate and having weights attached to both ends thereof, and an elastic member vertically provided between both sides of the rod of the leaf spring and the upper beam. 3. The elastic member comprises a pair of spring seats fixed to the upper beam and the leaf spring, and a coil spring inserted into the spring seat and compressed by the upper beam and the leaf spring. The elevator car according to claim 1 or 2, characterized in that.