JPH08288U - Elevator hoist - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide an elevator hoisting machine which is simple, inexpensive, and easy to install and maintain. The present invention is installed in a hoistway cross section of a hoistway bottom, transmits the driving force of a motor to an output shaft via an input shaft, and is coupled to a car by a drum attached to the output shaft. In an elevator hoist for driving a rope, a non-excitation operation type electromagnetic brake provided on the input shaft, a weight provided on the input shaft and displaced by centrifugal force when the input shaft rotates, and An elevator which is operated when the displacement amount of the weight reaches a set value, is provided with a switch for turning off the power source of the motor and the electromagnetic brake, and the weight and the switch are provided in a position separated from the horizontal projection plane of the car in a plane. It is a hoisting machine.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an elevator hoisting machine for personal residences.

[0002]

[Prior art]

 A conventional drum type elevator will be described with reference to FIGS. 5 and 6. For elevators for small buildings, especially elevators for private houses, it is not possible to secure a machine room at the top of the hoistway due to building height restrictions and machine room space saving. In many cases, the hoisting machine 1 is housed and installed in the cross section of the road. In such an elevator, the rope 3 connected to the car 2 is guided by the sorave sheave 4 at the upper part of the hoistway, inverted to the bottom of the hoistway, and guided around the drum 5 of the hoisting machine 1 to be wound. ing. The hoisting machine 1 decelerates the driving force of the motor 6 by the parallel shaft gear and transmits it to the output shaft 7, drives the drum 5 attached to the output shaft 7, and operates the car 2 in the hoistway.

Further, when the elevator car 2 significantly exceeds the steady speed for some reason, it is legally obliged to turn off the drive power source of the elevator and stop the car 2. Because of the nature of the safety device, the elevator speed detection mechanism must be mechanically switched off from the idea that it should be a fail-safe mechanism that operates even if there is an abnormality in control. Conventionally, the speed detection mechanism is provided with sheaves 8 and 9 above and below the hoistway and tensions the rope 10 with tension, and connects the rope 10 to the car 2 to change the speed of the car 2 to the sheaves 8 and 9. The rotation of the car 2 is stopped and the speed of the upper or lower sheaves 8 and 9 is mechanically detected to disconnect the switch when the car 2 significantly exceeds the steady speed and stop the car 2. It was

[0004]

[Problems to be solved by the device]

 In such a conventional elevator, when a speed detecting device was provided on the sheave 8 above the hoistway, the operator had to climb in the hoistway to check the speed detecting device, and there was a risk of falling and workability was poor. . Also, if a speed detection device is installed in the lower part of the hoistway, the speed detection device will be placed under the car 2 due to the layout of elevator equipment. If the car 2 descends below the lowest floor, it will be in a narrow space. The work was poor in workability, and there was a risk of being crushed by the car 2. Further, the speed detecting device including the sheaves 8, 9 and the rope 10 and the rope fixing device 11 is complicated and expensive.

The present invention has been made in order to solve the above drawbacks, and an object of the present invention is to provide a simple and inexpensive elevator hoisting machine which is easy to install and maintain.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is installed in the hoistway cross section at the bottom of the hoistway, transmits the driving force of the motor to the output shaft via the input shaft, and is mounted on the output shaft. In an elevator hoist that drives a rope coupled to a car by a drum, a non-excitation operation type electromagnetic brake provided on the input shaft, and when the input shaft rotates when the input shaft is rotated. The weight that is displaced by the centrifugal force and the switch that operates when the amount of displacement of this weight reaches the set value and that turns off the power of the motor and the electromagnetic brake are provided. (EN) Provided is an elevator hoist installed at a position off the horizontal projection plane.

[0007]

[Action]

 According to the present invention, when the rotation speed of the human power shaft rises and reaches the initial set value, the switch turns off the power of the brake, and the braking force of the brake stops the car.

[0008]

[Embodiment of device]

 An embodiment of the present invention will be described below with reference to FIGS. The input shaft 14 of the hoisting machine 1a is connected to a motor shaft 15, has a speed reduction mechanism by a parallel shaft gear 16, an intermediate shaft 17, and an output shaft 18, and a drum 5 is attached to an output shaft 18. The non-motor side of the input shaft 14 passes through the gear case 19, and a shaft-penetrating non-excitation operation type electromagnetic brake 20 is attached to the end surface of the gear case 19. A centrifugal speed detecting device movable portion 21 is attached to the shaft end side of the input shaft 14 so as to penetrate therethrough, and a detecting portion 22 of the speed detecting device is attached to the frame of the brake 20. In plan view, the reducer 25 part of the hoisting machine 1a and the motor 6 part are arranged in the horizontal projection plane of the car 2, and the drum 5, the brake 20, the speed detecting device 23, and the input shaft end 24 are mounted on the car 2. It is located on the side surface of the car 2 that is off the horizontal projection plane. The hoisting machine 1a as a whole is housed and installed in the hoistway cross section B of the hoistway bottom portion A. As shown in FIG. 3, in the speed detecting device 23, a weight 26 is rotatably attached to a boss 28 by a pin 27 and pulled inward by a spring 29.

Next, the operation will be described. As the rotation speed of the input shaft 14 of the hoisting machine 1a increases, the centrifugal force of the weight 26 exceeds the tensile force of the spring 29, and the weight 26 projects outward. When the number of revolutions of the input shaft 14 significantly exceeds the steady speed and reaches the initial set value, the weight 26 strikes the switch 30 of the speed detecting unit 22 to turn off the switch 30 to turn off the power of the motor 6 and the brake 20, and the brake The hoisting machine 1a and the car 2 are stopped by the braking force of 20.

According to this embodiment, since the speed detecting device is provided integrally with the hoisting machine, the complicated sheaves 8 and 9, the rope 10 and the rope fixing device 11 which are required in the prior art are not required, and the manufacturing cost and the building are reduced. It is possible to reduce the installation cost and the number of days required for installation. Further, since the brake 20 and the speed detecting device 23 are mounted on the side opposite to the motor of the input shaft 14, even if the car 2 descends below the lowest floor, the brake 20 and the speed can be detected on the side of the car 2. Since the inspection work of the device 23 can be performed, safety and workability are good. Even when the car 2 is manually operated at the time of elevator failure or installation, the worker 13 stands on the side of the car 2, manually releases the brake, inserts the turning handle at the end of the input shaft, and rotates it. You can work safely.

[0011]

[Effect of device]

 As described above, according to the present invention, the input shaft of the hoisting machine is provided with the non-excitation operation type electromagnetic brake and the weight that is displaced by the centrifugal force when the input shaft rotates, and the displacement amount of this weight is A switch for turning off the power supply of the motor and the electromagnetic brake when the set value is reached is provided, and the weight and the switch are arranged in a plane position outside the horizontal projection plane of the car. The cost and number of days required for installation will be reduced by simplifying, and the workability will be good during elevator installation and maintenance, and it will be a stable elevator for workers.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of the elevator of the present invention.

FIG. 2 is an enlarged view showing the bottom of the hoistway of the present invention.

FIG. 3 is an enlarged plan view of the bottom of the hoistway of the present invention.

FIG. 4 is a front view of a speed detecting device used in the present invention.

FIG. 5 is a schematic diagram showing a conventional elevator.

FIG. 6 is an enlarged view showing a conventional hoistway bottom.

[Explanation of symbols]

 1a: Hoisting machine, 2 ... Car, 3 ... Rope, 5 ... Drum, 6 ... Motor, 12 ... Brake, 14 ... Input shaft, 18 ... Output shaft, 23 ... Speed detection device , 30 ... switch.

Claims (1)

[Scope of utility model registration request] 1. A housing is installed in a hoistway cross section at the bottom of the hoistway, and the driving force of a motor is transmitted to an output shaft via an input shaft,
In an elevator hoist for driving a rope coupled to a car by a drum attached to the output shaft, a non-excitation operation type electromagnetic brake provided on the input shaft,
A weight provided on the input shaft, which is displaced by centrifugal force during rotation of the input shaft, and a switch which operates when the displacement amount of the weight reaches a set value and turns off the power of the motor and the electromagnetic brake are provided, An elevator hoisting machine, characterized in that the weight and the switch are provided at a position which is two-dimensionally displaced from the horizontal projection plane of the car.