JPH0286588A - Elevator - Google Patents

Abstract

PURPOSE:To prolong the service life of a main rope, eliminate any interference between this main rope and a sheave and prevent a noise from occurring as well as to improve the extent of riding quality by embedding each elastic ring in each peripheral groove part of respective deflecting sheaves, and installing these sheaves so as to cause a winding angle by the main rope to be formed at more than 90 degrees. CONSTITUTION:Each of deflecting sheaves 13, 14 is installed in respective brackets 16, 17 additionally installed in a machine frame 4 in making each height different, and these deflecting sheaves 13, 14 are installed so as to cause their winding angles beta1, beta2 by each main rope 7 to become more than 90 degrees. In consequence, abrasion due to application of the main rope 7 is abated, service life in the main rope 7 is prolonged, any interference between the main rope 7 and these deflecting sheaves 13, 14 is eliminated, and a noise is prevented from occurring so that good riding quality is giveable to passengers.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a traction type elevator that ascends and descends within a hoistway of a building, and particularly relates to a deflection sheave device in this elevator.

(Prior Art) A deflection sheave device for a traction type elevator of this kind that has already been proposed is constructed as shown in FIG. 40.

That is, in FIG. 4, a machine room 3 is formed in the upper part 2a of the hoistway 2 of the building 1, and a machine platform 4 is mounted on the upper part 2a of the hoistway 2 where the machine room 3 is located. has been
A hoisting machine 5 is installed on this machine stand 4. Further, a main rope 7 is wound around the hoisting drum 6 of this hoisting machine 5, and a car 8 is provided at one end 7a of this main row 17. The other end 7b has m
A first deflecting sheave 10 with a weight 9 attached to the machine base 4
and a second deflecting sheave 11.

That is, in the above-mentioned elevator deflection sheave device, when the distance M between the car 8 and the weight 9 becomes large,
Since the winding angle α between the winding drum 6 and the raw row 17 becomes smaller, the main rope 7 slips, impairing its elevating function as an elevator.
0 has been added to improve Traxidin's ability.

(Three Problems to be Solved by the Invention) However, since the above-mentioned deflection sheave device in the elevator is intended to improve the traction ability by adding the above-mentioned first deflection sheave 10, (1) the main rope 7 is The life of the main rope 7 is shortened due to increased wear due to use, and (2) when the main rope 7 interferes with each deflection sheave, noise is generated and gives a sense of anxiety to passengers. It has drawbacks such as making the ride uncomfortable.

The present invention has been made in view of the above-mentioned circumstances, and it reduces the wear caused by the use of the main rope, extends the life of the main rope, eliminates interference between the main rope and each deflecting sheave, and eliminates noise. To provide an elevator which prevents the occurrence of such problems and provides a good ride comfort to passengers.

[Structure of the invention]

(Means for Solving the Problems and Their Effects) The present invention provides a machine platform mounted in a machine room at the top of a hoistway, a hoist installed on this machine platform, and a winding drum of this hoist machine. A heavy rope is wound around the main rope, a weight is attached to one end of the main rope, a car is provided to the other end of the main rope, and at least two deflection sheaves are installed on the machine base. In an elevator which is equipped with a shaft so as to be wrapped around the main rope, each elastic ring is embedded in each circumferential groove of each of the deflection sheaves, and the winding angle of the main rope in each of the deflection sheaves is formed to be 90 degrees or more. This reduces the wear caused by the use of the main rope, extends the life of the main rope, eliminates interference between the main rope and each of the deflection sheaves, and prevents noise generation, which is good for passengers. It is designed to provide a comfortable ride.

(Example) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

Note that the present invention includes the same constituent members as those in the above-mentioned specific example.
The same reference numerals will be used to explain.

In FIGS. 1 to 3, reference numeral 1 denotes a building such as a high-rise building, and this building 1 is provided with a hoistway 2, and an upper part 2a of this hoistway 2 includes: A machine room 3 is formed, and a hoistway 2 in which this machine room 3 is located
A machine stand 4 is mounted on the upper part 2a of the machine.
A hoisting AI5 is installed through each cushioning material 12. In addition, a main rope 7 is attached to the hoisting drum 6 of this hoisting machine 5.
is wrapped around one end 7a of the main rope 7.
A car 8 is provided at the other end 7b of the main rope 7! l! The first weight 9 is attached to the machine base 4.
It is provided via a deflection sheave 13 and a second deflection sheave 14.

In particular, the first deflection sheave 13 and the second deflection sheave 1
As shown in FIG. 2, each 411j ring 15 is embedded in each circumferential groove portion 13a s 14a of 4, and the winding angle β11β2 of the main rope 7 in each deflecting sheave 13.14 is The angle is 90 degrees or more.

That is, each of the deflection sheaves 13.14 is mounted on each bracket 16.17 attached to the machine base 4 at different heights, and each of the deflection sheaves 13.14 is connected to the winding of the main rope 7. The angles βl and β2 are set to be 90 degrees or more.

Therefore, in the present invention, each of the deflecting sheaves 13 and 14 is formed so that the winding angles βl and β2 of the main rope 7 are 90 degrees or more, so that wear caused by the use of the main rope 7 can be prevented. The main rope 7 has a longer service life, eliminates interference between the main rope 7 and each of the deflecting sheaves 13 and 14, prevents noise generation, and provides a comfortable ride for passengers. be able to.

Next, the present invention will be explained using mathematical formulas.

': In Figure A3, if each deflecting sheave 13, 14 is formed so that the winding angle β11β2 of the main rope 7 is 90 degrees or more, the force P generated by the tension of the main rope 7 is deflected by the moment of inertia I. The amount of force required to move it must be greater than that required.

That is, if we express this mathematically, Force generated by rope tension Deflecting sheave moment of inertia angular acceleration Deflection sheave radius Wrapping angle of deflection sheave (βl, β2) Friction between elastic ring and deflection sheave number shall be.

In this way, as is clear from the above formula, each deflecting sheave 13, 14 has a wrapping angle β of the main rope 7.
By forming and providing β2 at an angle of 90 degrees or more, slippage of the main rope 7 is eliminated, wear caused by use of the main rope 7 is reduced, and the life of the main rope 7 is extended. can do.

〔Effect of the invention〕

As described above, according to the present invention, the upper part 2a of the hoistway 2
A machine stand 4 is installed in the machine room 3, a hoist 5 is installed on this machine stand 4, a main rope 7 is wound around the hoist drum 6 of this hoist 5, and the main rope 7 is A car 9 is provided at one end 7a, a weight 9 is provided at the other end 7b of the main rope 7, and at least two deflection sheaves 13.
14 is mounted on the shaft so that the main rope 7 is wound around the main rope 7, each elastic ring 15 is embedded in each circumferential groove part 13 a s 14 a of each deflecting sheave 13.14, and each deflecting sheave 13. Since the winding angle of the main rope 7 is formed to be 90 degrees or more, it is possible not only to reduce the wear caused by the use of the main rope 7, but also to extend the life of the main rope 7. Interference between the main rope 7 and each of the deflecting sheaves 13, 14 can be eliminated, noise generation can be prevented, and a good ride comfort can be provided to passengers.

[Brief explanation of the drawing]

1 is a diagrammatic view of an elevator according to the invention; FIG. 2 is a sectional view showing half of the deflection sheave incorporated in the invention; and FIG.
The figure is a diagram for explaining the present invention in detail, and the fourth factor is a diagram of an elevator that has already been proposed. 2... Hoistway, 3... Machine room, 4... Machine platform, 5...
・-Hoisting machine, 6... Winding drum, 7... Main rope,
8... Car, 9... 2 yen weight, 13... 1st
Deflection sheave, 14...Second deflection sheave, 15...
・Elastic ring.

Claims (1)

[Claims] A machine stand is installed in the machine room at the top of the hoistway, a hoist is installed on this machine stand, a main rope is wound around the winding drum of this hoist, and a heavy load is attached to one end of the main rope. In an elevator in which a weight is provided and a car is provided at the other end of the main rope, and at least two deflection sheaves are mounted on the machine base so as to wrap the main rope, each of the deflection sheaves is An elevator characterized in that each elastic ring is embedded in each circumferential groove, and the main rope is wrapped around each deflecting sheave at a wrapping angle of 90 degrees or more.