JPH0710421A - Car device of elevator - Google Patents

Abstract

PURPOSE:To provide 2:1 roving elevator which is light weight and for which energy is saved and also which is fully endulable to requirement on low vibration and low noise as an inexpensive and efficient car vibration-proof structure. CONSTITUTION:When a rotary shaft bearing 5(b) of two sheaves 5 is attached to the underfloor frame 1(a) of a car 1 via an elastic member 5(c), they are inclined by 45 degrees so that no shearing force is applied to the elastic member 5(c). Thereby, the space saving and small and light weight elevator can be provided at a low cost because an underfloor space of the car can be reduced sufficiently while giving an elevator enough vibrationproofing property and keeping agreeable riding comfortableness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 2: 1 roping type elevator car support bearing sheave mounting structure,
In particular, the present invention relates to an elevator car device that is space-saving and easy to reduce cost, is efficient, and is suitable for reducing vibration noise.

[0002]

2. Description of the Related Art In recent years, elevators have come into widespread use, but the buildings installed with them are not limited to the specified areas as they have been until now, and they are becoming larger. From this point of view, reducing the installation space of elevators is a major issue.

Therefore, as a means for solving this problem,
Although a 2: 1 roping type elevator has been proposed, a vibration and noise reduction method adopted in the so-called underslang type elevator car, in which a sheave for supporting the car is installed under the current car floor. Has a so-called double floor structure in which an elastic body is provided under the floor of a car as disclosed in, for example, Japanese Patent Laid-Open No. 57-126377, and is expected to reduce a relatively low vibration frequency. Therefore, it was a method of providing a soft or, in other words, a large elastic body.

[0004]

The above prior art has a double-floor structure in which an elastic body is interposed between the floor of the car and the frame of the car. The invalid space became large, which was a major obstacle to the reduction of the floor digging space on the lowest floor of the hoistway.

An object of the present invention is to provide a 2: 1 roping elevator, which is particularly lightweight, space-saving, and can withstand the requirements of low vibration and low noise, as an inexpensive and efficient car vibration damping structure for a car.

[0006]

[Means for Solving the Problems] The object is to provide the sheave of the sheave supporting the car and the bearing mounting portion installed in the underfloor of the car frame by the rope. This is achieved by being provided so as to be inclined in the direction of stress.

[0007]

According to the prior art, for the vibration isolation of the car, a so-called double structure is provided in which a separate frame is provided for mounting the sheave under the floor of the car and a vibration-proof elastic body is mounted between the frame and the car. Because of the floor structure, the structural dimensions under the floor of the car were large.

According to the present invention, the bearing of the sheave is directly attached to the underfloor of the car through the elastic body, whereby the space required for the underfloor structure can be reduced, and at the same time, stable vibration absorption, that is, in the car When it is possible to reduce noise and vibration, the stress acting on the elastic body can be limited to that acting in the compression direction, so a shear force prevention device is not required, so the configuration is simple and space saving Is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The elevator car device according to the present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 4 shows a longitudinal section of an elevator and an entire hoistway to which an embodiment of the present invention is applied. In this figure, 1 is a car, 2 is a counterweight, and 3 is a winding. Upper machine, 4 is a rope, 5 is a sheave provided under the floor of the car 1, 6 is a sheave above the counterweight 2, 7 is a floor digging pit on the lowest floor of the building, and car 1 is The rope 4 is wound around the sheave 3a of the hoisting machine 3 provided at the top of the hoistway, on the one hand through the sheave 2 under the car floor, and on the other hand through the sheave 6 with a counterweight. By attaching the elastic support members 4a and 4b to the support member 8 at the top, a 2: 1 roping type elevator is configured.

By the way, this roping method is a means adopted to minimize the space at the top of the hoistway, but on the other hand, there is a tendency that the bottom floor digging pit 7 becomes relatively large, and is particularly small. In the case of a residential building, the reduction in size has been raised as a major issue, as mentioned above.

As is clear from FIG. 4, the vibration generated by the hoisting machine 3 is transmitted through the rope 4 as it is,
Since it is transmitted to the sheave 5 under the floor of the car 1,
If the bearings of the sheave 5 are installed as they are under the floor of the car 1, the above vibrations are also transmitted from the sheave 5 to the floor of the car 1 to deteriorate the riding comfort.

Therefore, as described above, in the prior art,
As a solution to this, a means for inserting an elastic body for vibration isolation between the underfloor frame supporting the sheave 5 and the car floor is adopted, but this method is used when a large underfloor dimension can be taken. Although it is good, if there are restrictions on the size of the underfloor, it is a big obstacle as described above.

Next, an embodiment of the present invention will be described with reference to FIGS.

In FIGS. 1 and 2, first, the sheave 5
Is rotatably attached to the support shaft 5a by a bearing B. On the other hand, a fixed bearing 5b is attached to the support shaft 5a, and the fixed bearing 5b is further attached to the underfloor frame 1a of the car 1 via an elastic body 5c.

At this time, as can be clearly seen from FIG. 1, the mounting angle of the fixed bearing 5b to the underfloor frame 1a is such that an inclination of about 45 ° is given to both side surfaces of the car 1. There is.

Further, a brim member 5d is attached to the support shaft 5a, and the brim member 5d is in contact with the support portion 1b of the underfloor frame 1a via an annular elastic body 5e.

Therefore, according to this embodiment, the vibration transmitted from the rope 4 to the sheave 5 is absorbed by the elastic body 5c and hardly transmitted to the car 1, and the vibration and noise in the car 1 are reduced. Can be sufficiently reduced.

At this time, the elastic body 5c is directly attached between the fixed bearing 5b and the underfloor frame 1a, and is installed between the floor of the car and the underfloor frame body as in the conventional example. Therefore, the installation of the elastic body 5c hardly increases the space, and a sufficient space can be obtained.

Further, in this embodiment, as is clear from FIG. 1, the fixed bearing 5b is attached at an angle of about 45 ° with respect to the floor surface of the car 1. FIG. 3 shows the relationship between the forces applied to the sheave 5 by the rope 4 that suspends the car 1. Here, the car 1
The weight of the vehicle and the passenger load are supported by the rope 4 via the underfloor sheave 5. The force relationship in this state is that the vertical hanging force P _V and the horizontal force P _H stretched for reversing the direction of the rope 4 are applied to the sheave 5.

However, since the force P _V and the force P _H are substantially equal to each other, the resultant force, that is, the force P applied to the sheave 5 is 45.
And the elastic body 5b is rotated by 45 degrees as in this embodiment.
If it is attached in the ° direction, no shearing force is applied to the elastic body 5c and no special shearing force preventing device is required, so that the structure is simplified and further space saving can be obtained.

Further, in this embodiment, the collar member 5d is integrally attached to the fixed shaft 5a of the sheave 5, and the collar member 5d is attached to the support portion 1b of the underfloor frame 1a by the annular elastic body 5e. Since they are attached by sandwiching, it is possible to easily prevent the displacement of the elastic body 5c, which essentially has the property of allowing axial movement, that is, the lateral shake of the sheave 5.

[0023]

EFFECTS OF THE INVENTION According to the present invention, the space under the floor of the car can be made sufficiently small while providing a sufficient vibration damping function and maintaining a good riding comfort. It can be provided at low cost.

[Brief description of drawings]

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

2 is a cross-sectional view taken along the line II of FIG.

FIG. 3 is an explanatory diagram of stress applied to a sheave.

FIG. 4 is a sectional view showing an example of an elevator device to which an embodiment of the present invention is applied.

[Explanation of symbols]

 1 Car 1a Car floor 1b Support part 2 Balance weight 3 Hoisting machine 4 Rope 5 Sheave 5a Support shaft 5b Fixed bearing 5c Elastic body 5d Collar member 5e Annular elastic body B bearing

Front page continued (72) Inventor Makoto Kawagoe, 1070 Ige, Katsuta, Ibaraki, Hitachi Elevator Engineering Co., Ltd. (72) Inventor, Joji Ichiyama 1070, Ige, Katsuta, Ibaraki Hitachi, Ltd.

Claims (1)

[Claims] 1. An elevator device of 2: 1 roping system, wherein ropes are hooked on a car by means of sheaves installed on one side and the other side near both sides of the floor part of the car frame, respectively. The bearing mounting part installed in the underfloor part of the car frame and the bearing part of
An elevator car device, wherein the sheave is formed so as to be inclined in a direction of stress applied by the rope.