JPH0228489A - Hoisting device for elevator - Google Patents

Abstract

PURPOSE:To simplify mechanism and cut cost by using a rotary type linear motor as the electric motor of a hoisting device for an elevator and releasing the brake of a brake mechanism in interlocking with the shift of the primary side of the linear motor. CONSTITUTION:When a rotary type linear motor 23 used as electric motor is brought into electric conduction, the primary side 26 of a linear motor generates an attractive force and a rotary propulsion force between a reaction rotor 25. Therefore, the primary side 26 of the linear motor approaches to the reaction rotor 25 side until a prescribed small gap is generated. A brake mechanism 32 is brake-released through an interlocking link 36 interlocking with this shift, and the reaction rotor 25 revolves integrally with a rotary shaft 24, and drives a hoisting sheave (or hoisting drum) 30. On the contrary, when the electric conduction of the linear motor 23 is suspended, the attractive force between the primary side 26 of the linear motor and the reaction rotor 25 is eliminated, and the interlocking link 36 is set free, and a brake mechanism 32 is applied with brake.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a hoisting device for an elevator such as an elevator.

(Prior Art) Generally, in a hoisting device for an elevator such as an elevator, as shown in FIGS. 6 and 7, an electric motor 1 is connected to a stator 2.
, a rotor 3 and a rotating shaft 4. One end of the rotating shaft 4 is extended long, and a hoisting sheave (or hoisting drum) 5 and an electromagnetic brake 6 are integrally formed on this extended shaft. A brake drum 7 is fitted. Although not shown, the main lobe of the elevator is wrapped around the hoisting sheave 5 to rotate it.

As shown in FIG. 7, the electromagnetic brake 6 has a pair of brake shoes 8 on both sides that sandwich the outer peripheral surface of the brake drum 7 from both sides and apply braking to the brake arms 9 on both sides.
It is attached to the inner surface of the The brake arms 9 on both sides are rotatably erected by having their lower ends pivotally connected to the frame 10 of the electric motor 1 via hinges 11, and their upper ends are pressed in a direction toward each other by a brake spring 12. ing. The brake springs 12 on both sides are attached via rods 14 protruding from both sides of a support base 13 fixed above the brake tram 7. On the other hand, an electromagnetic coil 16 and a plunger 17 are attached to the support base 13 via a mounting frame 15, and a pair of rotating levers 18 on both sides to be pushed to the lower end of the plunger 17 are respectively pivotally attached to the support base 13. The configuration is as follows.

Then, by energizing the electromagnetic coil 16, the plunger 17 is attracted downward and pushes the rotation lever 18, thereby rotating the brake arms 9 on both sides so as to push them open against the brake spring 12. Then, the brake can be released by separating the inner brake shoe 8 from the outer peripheral surface of the brake drum 7. Conversely, when the electromagnetic coil 16 is de-energized, the force of the plunger 17 to push and open the brake arms 9 on both sides disappears, the brake arms 9 on both sides are pushed by the brake spring 12, and the brake shoes 8 are pressed against the outer peripheral surface of the brake drum 7. You will be able to apply the brakes by pinching it from both sides.

(Problem to be Solved by the Invention) By the way, in the conventional hoisting device having the above-mentioned configuration, a dedicated electromagnetic brake 6 is used to apply and release the brake.
In addition, a power source, a control device, and the like for exciting the electromagnetic coil 16 of the electromagnetic brake 6 are required, leading to a problem of increased costs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hoisting device for an elevator that can apply and release a brake with a simple configuration without requiring a dedicated electromagnetic brake or its power source, thereby reducing costs. With the goal.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a hoisting device for an elevator such as an elevator in which a hoisting sheave or a hoisting drum is provided on the rotating shaft of an electric motor and a brake mechanism is provided. The electric motor is a rotary type linear motor that includes a reaction rotor and a primary linear motor that is arranged so as to be movable in the approaching and separating directions facing the outer periphery of the reaction rotor and that generates an attractive force and rotational thrust between the reaction rotor and the reaction rotor when energized. The present invention is characterized in that it uses a motor and is provided with an interlocking link that releases the brake of the brake mechanism in conjunction with the suction approach movement of the linear motor toward the reaction rotor by energization of the linear motor.

(Function) By virtue of the above, the hoisting device for an elevator of the present invention is such that when the rotary linear motor used as an electric motor is energized, the primary of the linear motor generates an attractive force and a rotational thrust between it and the reaction rotor. , now the linear motor primary moves close to the reaction rotor side until there is a predetermined small gap, and the brake mechanism is released via the interlocking link linked to this movement, and the reaction rotor rotates together with the rotating shaft. Then, the hoisting sheave or hoisting drum is driven. Conversely, when the power to the linear motor is stopped, the attraction between the linear motor primary and the reaction rotor disappears, and the interlocking link becomes free. The brake mechanism will now apply the brakes.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3. Figure 1 is a plan view of the entire hoisting device, and Figures 2 and 3 are
The figure is a sectional view taken along the lines ■-■ and ■-□■ in FIG. In the figure, reference numeral 20 denotes a pedestal, and a rotating shaft 24 of an electric motor 23 is held via bearings 21 and 22 erected at both ends of the pedestal 20.

A rotary linear motor is used as the electric motor 23, and will be simply referred to as the linear motor 23 hereinafter.

The structure of this linear motor 23 consists of a reaction rotor 25 fitted onto a rotating shaft 24, and a pair of linear motor primaries 26 that are separated and independent from each other and are disposed opposite to each other on both sides of the outer periphery of the reaction rotor 25. The reaction rotor 25 has a cylindrical outer circumference. The pair of linear motor primaries 26 on both sides each have an iron core 26a having a substantially semicircular arc shape (arch shape) along the outer peripheral surface of the reaction rotor 25, and this iron core 26a.
The coil 26b is assembled into a coil 26b. Both near motor primaries 26 are arranged so that the lower end of each iron core 26a is pivotally mounted on the pedestal 20 by hinges 27 on both sides.
a is disposed to face the outer peripheral surface of the reaction rotor 25 and to be movable (rotatable) in the approaching and separating directions. When both of the near motor primary 26 are energized, each iron core 26a generates an attractive force with the rear crayon rotor 25, moves toward the rear crayon rotor 25, and at the same time generates a rotational thrust to react to the reaction. The rotor 25 is rotated. Note that protrusions 28 are provided on the opposing upper ends of the iron cores 26a of both near motor primaries 26, and when these protrusions 28 butt against each other, further movement of the iron cores 26a toward the rear crayon rotor 25 is prevented. As a result, a certain small gap can be maintained between the inner circumferential surface of each iron core 26a and the outer circumferential surface of the rear rotor 25 during energization.

Similarly to the conventional art, a hoisting sheave (or hoisting drum) 30 is fitted onto the extending portion of the rotating shaft 24 of the near motor 23 so as to rotate together with the hoisting sheave (or hoisting drum).

Further, a brake mechanism 31 is coaxially provided on one side of the hoisting sheave 30. This brake mechanism 31 holds a brake drum 32 fitted to a rotating shaft 24, a pair of brake shoes 33 on both sides that apply braking by sandwiching the outer peripheral surface of this brake drum 32 from both sides, and these brake shoes 33, respectively. A pair of brake arms 3 on both sides
4, and a pair of brake springs 35 on both sides that press the brake arms 34 on both sides in the direction of approaching each other.Like a conventional electromagnetic brake, it is equipped with an electromagnetic coil and plunger dedicated to releasing the brake, a dedicated power supply, It has a structure without a control device.

Instead, a pair of interlocking links 36 on both sides are provided. Both of these interlocking links 36 are pivotally connected at their intermediate portions via pins 38 to the lower surface of a support stand 37 which is erected from the pedestal 20 and fixed above the brake drum 32.
One end of each is connected to the iron core 2 of the linear motor primary 26 on both sides.
It is pivotally connected to the upper end portion of 6a via a pin 39. The other end of the interlocking link 36 is rotated about the pin 38 in conjunction with the suction approach movement of the linear motor primaries 26 on both sides of the linear motor 23 toward the rear crayon rotor 25 side. The brake arms 34 on both sides are rotated so as to push each other apart against the brake spring 35, and the inner brake shoes 33 are separated from the outer peripheral surface of the brake drum 32 to release the brake. . Note that the brake arms 34 on both sides are rotatably erected by having their lower ends pivotally connected to the pedestal 20 via hinges 40, and the brake springs 35 that press these from both sides are attached to the support pedestal. It is attached via rods 41 protruding from both sides of 37.

In the hoisting device configured as described above, when a three-phase alternating current is passed through the linear motor primaries 26 on both sides of the linear motor 23 as an electric motor, an attractive force is generated between the linear motor 26 and the rear rotor 25. , the rear rotor 2
A thrust force is generated that tries to rotate 5. It is known from actual measurements and analysis that the suction force, that is, the vertical force, exhibits a larger value than the thrust force, and in some cases can be two to four times larger than the thrust force.

This vertical force causes the linear motor primaries 26 on both sides to be sucked toward the rear crayon rotor 25 and rotate about their respective hinges 27 as fulcrums.

In conjunction with this, both side interlocking links 36 are connected to pins 38, respectively.
The two brake arms 34 of the brake mechanism 31 are rotated at the other end so as to be pushed apart against the brake spring 35, and the inner brake shoes 33 are rotated from the outer peripheral surface of the brake drum 32. Move away and release the brake.

Now the reaction rotor 25 is the linear motor primary 26
The thrust starts to rotate together with the rotating shaft 24, and the hoisting sheave 30 is rotationally driven.

Furthermore, when the power supply to the linear motor primary 26 is stopped during the rotation, the attraction force between the linear motor primary 26 and the reaction rotor 25 disappears, and the force of the both-side interlocking links 36 to push the both-side brake arms 34 open is released. do. As a result, the brake arms 34 on both sides are compressed by the spring force of the brake springs 35 on both sides, and the brake shoes 33 on the inner side are pressed against the outer peripheral surface of the brake drum 32 from both sides to apply the brake. This causes the hoisting sheave 30 to stop rotating together with the rotating shaft 24.

Such a hoisting device is configured to release the brake by using it as an electric motor or by using the attraction force between the linear motor primary 26 and the reaction rotor 25 when the near motor 23 is energized, so the brake mechanism 31 is not necessary in the past. There is no need for an electromagnetic coil or plunger dedicated to releasing the brake, as well as a dedicated power source or control device, as in the case of electromagnetic brakes.

Next, another embodiment of the present invention will be described with reference to FIGS. 4 and 5. Here, a brake mechanism 31A is built into the inner circumference of the reaction rotor 25 of the beam near motor 23, and the cylindrical reaction rotor 25 is used as a brake drum, with a pair of brake drums on both sides facing the inner circumference of the cylindrical reaction rotor 25. Brake shoes 33A and brake arms 34A respectively
It is supported and arranged by Brake arms 3 on both sides
4A is a support plate 37 whose lower end is erected from the frame 20;
A telescopic rod 4 is rotatably supported by a hinge 40 and has an intermediate portion protruding from the support plate 37A.
A pair of brake springs 3' and 3A provided on both sides of the reaction rotor 25 are always pressed, and each outer brake shoe 33A is brought into pressure contact with the inner peripheral surface of the reaction rotor 25 to apply braking. There is. A pair of interlocking links 36A on both sides are provided for releasing the brake of the brake mechanism 31A. These interlocking links 36A are arranged in an X-shape, and a pin 3 is attached to the upper end of the support plate 37A.
8, and their upper ends are pivotally connected by pins 39 to the upper end-side projections of the iron cores 26a of the linear motor primaries 26 on both sides. Further, a tension rod 42 is pivotally connected between the lower ends of both interlocking links 36A and the upper end of the brake arm 34A.

As the linear motors 23 are energized, the linear motor primaries 26 on both sides move toward the rear crayon rotor 25 by suction, and the connecting links 36A arranged in an X-shape rotate about the pins 38, thereby pulling the The brake arms 34A on both sides are rotated so as to be drawn toward each other against the brake spring 35A via the rod 42, and the outer brake shoes 33A are separated from the inner peripheral surface of the rear rotor 25 to release the brake. become.

With such a configuration, the reaction rotor 25 can also be used as a brake drum, and the axial length of the entire hoisting device can be significantly shortened.

〔Effect of the invention〕

Since the present invention is configured as described above, the hoisting device for an elevator can apply and release the brake with a simple configuration without requiring a dedicated electromagnetic brake or its power source as in the past, thereby reducing costs. is obtained.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
3 is a cross-sectional view taken along the line ■-■ in FIG. 1, FIG. 4 is a cross-sectional view showing another embodiment of the present invention, and FIG. 6 is a sectional view of a conventional hoisting device with the lower half omitted, and FIG. 7 is a sectional view of the electromagnetic brake section of FIG. 6. 23... Linear motor, 24... Rotating shaft, 25...
・Reaction rotor, 26.26A...Linear motor primary, 30...Hoisting sheave (or hoisting drum), 3
2...Brake mechanism, 36.36A...Interlocking link. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] In a hoisting device for an elevator such as an elevator, in which a hoisting sheave or a hoisting drum is provided on the rotating shaft of the electric motor, and a brake mechanism is provided, the electric motor is movable in a direction toward and away from a reaction rotor, facing the outer periphery of the reaction rotor. A rotary linear motor is used, which is composed of a linear motor primary which is arranged on the side and generates an attraction force and a rotational thrust between the linear motor and the reaction rotor when energized. A hoisting device for an elevator, comprising an interlocking link that releases the brake of the brake mechanism in conjunction with suction approach movement.