JP2013100175A - Thin hoist of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin hoist of an elevator which has a highly rigid brake drum and increases a braking force without employing something special.SOLUTION: The thin hoist 6 of the elevator brakes the rotation of the brake drum and a sheave 8 by bringing a brake lining 11 of an electromagnetic brake 10 into pressure contact with an outer peripheral braking surface 12 of the brake drum 9. A width dimension orthogonal to an axial rotation direction of the outer peripheral braking surface of the brake drum is set larger than a minimum thickness dimension of the brake drum, a minimum thickness part of the brake drum is provided in a plane of projection orthogonal to an axial rotation direction of the outer peripheral braking surface, a peripheral edge 19 of the brake drum has an approximately T-shaped cross-section, an opening angle of a sheave-side butt part 20 of the approximately T-shaped cross-section brake drum is set to an approximately acute angle, an oil groove for storing an oil running from a side surface of the brake drum is formed, and a motor rotor 21 is fixed to a butt part 22 on the side opposite to the sheave in the approximately T-shaped cross-section brake drum.

Description

  The present invention relates to a machine room-less elevator without a machine room, and more particularly to a thin hoisting machine.

  In an elevator, a hoisting machine and a motor control device for raising and lowering the car up and down, or a speed governor used for emergency braking when the car is overspeeded are generally installed at the top of the building. Installed in the formed machine room. However, in recent years, elevators that have a relatively slow ascending / descending speed of a car have become mainstream without a machine room called a machine room-less elevator. In the case of such an elevator, everything that was conventionally installed in the machine room must be installed in the hoistway, and the hoisting machine must also be installed in the hoistway. There are various shapes and installation forms of the hoisting machine of such a machine room-less elevator, for example, so that the hoisting machine partially overlaps the projection surface of the car at the lowermost part or the uppermost part of the hoistway. Some are installed, or some are installed in the clearance between the elevator car and the hoistway wall in the middle of the hoistway. In addition, since the clearance between the carriage and the hoistway wall is about several hundred mm, a flat hoisting machine is necessary in consideration of installing a hoisting machine in the gap, so-called thin hoisting. The machine is being used.

  In such a thin hoisting machine, conventionally, a configuration is known in which the hoisting machine is braked by pressing an outer peripheral braking surface of a brake drum with a brake lining of an electromagnetic brake (see, for example, Patent Document 1). . In the conventional one, the peripheral edge of the brake drum has a substantially L-shaped cross section.

  In addition, the machine room-less elevator thin hoisting machine is generally installed in the form of facing the hoistway wall in a gap of about several hundred mm between the hoistway and the car. If the hoisting machine can be made thinner, the hoistway cross section can be reduced, and the degree of freedom of layout of the equipment in the hoistway can be increased. Therefore, downsizing of a thin hoisting machine, in particular, reduction of the thickness dimension of the entire hoisting machine has been very important in increasing the value of a machine room-less elevator.

JP 2004-35121 A

  However, in the thin hoist described in Patent Document 1 described above, the shape of the brake drum with respect to the pressing force of the brake lining required to ensure the braking force of the hoist is not sufficiently studied. For this reason, in order to ensure the rigidity required for the brake drum, the thickness of the brake drum has been increased, and as a result, the brake has been increased in size. Also, oil attached to the side of the brake drum from the main rope that drives the car, the sheave that drives the main rope, etc., travels along the side of the brake drum due to centrifugal force caused by rotational motion, and Sufficient consideration has not been given to the structure that prevents the contact surface of the brake lining from adhering to the braking surface. For this reason, in order to ensure the braking force necessary for the hoisting machine, the size of the brake is increased. Therefore, it has been necessary to add a structure for preventing oil adhesion to the braking surface. Therefore, the conventional structure has a problem that the thickness dimension, which is important for increasing the value of the thin hoisting machine, cannot be effectively reduced.

  The present invention has been made from the state of the prior art described above, and its purpose is to increase the rigidity of the brake drum and reduce the thickness of the elevator that can improve the braking force without requiring a special one. It is to provide a superior machine.

  In order to achieve the above-mentioned object, the present invention provides a housing that supports a suspended load, a main shaft that is cantilevered and supported by the housing, and a bearing that is fixed to the other end of the main shaft. A brake drum supported by the brake drum, a sheave that rotates integrally with the brake drum, and an electromagnetic brake disposed outside the brake drum, and the brake lining of the electromagnetic brake is disposed on the outer peripheral braking surface of the brake drum. In the elevator hoisting machine that presses against the brake drum and brakes the rotation of the sheave, the width dimension perpendicular to the axial rotation direction of the outer peripheral braking surface of the brake drum is the minimum thickness dimension of the brake drum. The brake drum minimum thickness portion is provided in a projection plane orthogonal to the axial rotation direction of the outer peripheral braking surface, and the periphery of the brake drum is substantially It is characterized in that it has a shaped cross section.

  In the present invention configured as described above, the peripheral portion of the brake drum has a substantially T-shaped cross section, so that the pressing force of the brake lining is efficiently received and the peripheral portion has the same volume and thickness dimensions as compared with the conventional one. Thus, the brake drum can be made highly rigid.

  Further, the present invention is characterized in that the opening angle of the sheave side abutting portion of the brake drum having a substantially T-shaped cross section is an acute angle, and an oil groove is provided for storing oil transmitted from the side surface of the brake drum.

  In the present invention configured as described above, the oil transmitted on the side surface of the brake drum is directed toward the outer peripheral braking surface by the rotational centrifugal force of the brake drum. However, when the hoisting machine is rotated, the centrifugal force causes a substantially T-shaped structure. Accumulate at the sheave side butt. On the other hand, when stopping, the oil travels along the side of the brake drum or the sheave side abutting section that becomes the oil groove and accumulates at the bottom of the sheave side abutting section. A function of preventing reaching to the outer peripheral braking surface is provided, and thereby the braking force can be improved.

  Furthermore, the present invention is characterized in that a motor rotor is fixed to the anti-shelter side abutting portion of the brake drum having a substantially T-shaped cross section.

  In the present invention configured as described above, the dead space in the space surrounded by the casing and the brake drum can be reduced by disposing the motor rotor in the space of the anti-shelter side butt portion having a substantially T-shaped structure. It becomes possible.

  According to the present invention, it is not necessary to increase the thickness dimension for the purpose of ensuring the rigidity of the brake drum and to increase the size of the brake for ensuring the braking force, and the oil transmitted on the side surface of the brake drum on the sheave side is braked It is possible to provide an oil receiving function for preventing adhesion to the surface without adding parts, and to reduce the dead space inside the hoisting machine, thereby effectively reducing the hoisting machine size. Can be made thinner and thinner.

It is a top view of the elevator apparatus with which the thin hoisting machine of this invention is applied. It is a front view of a thin hoisting machine. It is a side view of a thin hoisting machine. It is a longitudinal cross-sectional view which shows one Example of the thin hoisting machine of the elevator which concerns on this invention. It is an enlarged view of the brake drum peripheral part in a present Example. It is an enlarged view of the outer periphery braking surface peripheral structure of the brake drum in a present Example. It is a front view explaining the movement of the oil at the time of winding machine rotation in a present Example. It is a front view explaining the movement of the oil at the time of the winding machine stop in a present Example.

  Embodiments of a thin hoisting machine for an elevator according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the elevator apparatus includes a car 3 that can be raised and lowered along a pair of guide rails 2 in a hoistway 1, and a pair of guide rails 4 that are connected to the car 3 by a main rope (not shown). A counterweight 5 that can be moved up and down along with a thin hoist 6 installed in a gap between the hoistway 1 and the car 3 is provided. The thin hoisting machine 6 will be described in detail later, but a stationary casing 7 is positioned on the car 3 side, and a sheave 8 that is rotatable with respect to the casing 7 is on the hoistway wall side. Is located.

  The thin hoisting machine 6 is wound so that a plurality of main ropes (not shown) connected between the car 3 and the counterweight 5 are respectively matched with a plurality of grooves formed in the sheave 8. When the main rope is driven by this rotation, the car 3 and the counterweight 5 are configured to move up and down in the opposite direction along the guide rails 2 and 4.

  As shown in FIGS. 2 and 3, a brake drum 9 is integrally coupled to the outer periphery of the sheave 8 on the car 3 side, and a housing 7 is disposed on the car drum 3 side of the brake drum 9. As with the sheave 8, the brake drum 9 is rotatably supported with respect to the housing 7.

  An outer rotor type motor is configured at the fitting facing portion between the brake drum 9 and the casing 7, and the detailed configuration thereof will be described later. The rotor of the outer rotor type motor is disposed on the peripheral edge of the brake drum 9, The stator of the outer rotor type motor is disposed at a position facing the casing 7. The movable part represented by the sheave 8 and the brake drum 9 is integrally rotated by energization to the outer rotor type motor, but the energization is cut off and the same configuration is arranged on the upper and lower parts of the housing 7 respectively. When the brake lining 11 of the electromagnetic brake 10 is pressed against the outer peripheral braking surface 12 of the brake drum 9, braking is performed.

  As shown in FIG. 4, the casing 7 has a main shaft 13 fitted to a boss formed at the center thereof, and a sheave 8 and a brake drum 9 are inserted into the insertion side of the main shaft 13 via a bearing 14. Is supported in a cantilevered manner. A sealing material 16 is disposed at the end of the bearing 14 to prevent the lubricating oil of the bearing 14 from leaking outside the movable housing 15. An annular recess 17 is formed on the sheave 8 side of the housing 7, and an annular motor stator 18 is fitted and fixed in the annular recess 17.

  As shown in FIG. 5, the brake drum 9 has a width dimension orthogonal to the axial rotation direction of the outer peripheral braking surface 12 larger than the dimension of the minimum thickness portion 23 and the brake drum minimum thickness portion 23. The outer peripheral braking surface 12 is provided in a projection plane orthogonal to the axial rotation direction, and the peripheral edge portion 19 has a substantially T-shaped cross section. In addition, the opening angle of the sheave side abutting portion 20 of the peripheral edge portion 19 that has a substantially T-shaped cross section is set to a substantially acute angle, and an oil groove for collecting oil transmitted from the side surface of the brake drum 9 is formed.

  As shown in FIG. 6, the annular motor rotor 21 is fixed to the counter sheave side abutting portion 22 of the peripheral edge portion 19 having a substantially T-shaped cross section, and the motor stator 18 described above via a predetermined gap. Is facing.

  In the present embodiment, when an alternating current is passed through the motor stator 18, a magnetic field that changes in the circumferential direction is generated, so that an electromagnetic force acts on the motor rotor 21, causing the brake drum 9 and the movable housing 15. The sheave 8 and the sheave 8 rotate integrally, and the car 3 and the counterweight 5 are driven up and down via the main rope wound around the sheave 8. On the other hand, when the car 3 is stopped, the motor stator 18 is de-energized, and the electromagnetic brake 10 is operated to press the brake lining 11 against the outer peripheral braking surface 12 of the brake drum 9. The movable housing 15 and the sheave 8 are braked. At this time, when the brake lining 11 is pressed against the brake drum 9, the peripheral edge 19 of the brake drum 9 is bent, but by forming the cross-section of the peripheral edge 19 in a substantially T shape, high rigidity against the pressing force is achieved. The increase in thickness of the brake drum 9 for the purpose of ensuring rigidity is avoided.

  Further, when the thin hoist 6 rotates, if oil from the main rope or sheave 8 adheres to the side surface of the brake drum 9 on the sheave 8 side, as shown in FIG. Is transmitted to the outer peripheral direction of the brake drum 9 and toward the outer peripheral braking surface 12, but the opening angle of the sheave side abutting portion 20 of the peripheral edge portion 19 is formed at a substantially acute angle, acting as an oil groove, When the thin hoisting machine 6 rotates, the sheave side butt 20 accumulates due to the centrifugal force. On the other hand, when the thin hoist 6 stops, the oil in the sheave-side butting portion 20 moves downward along the side surface of the brake drum 9 or the sheave-side butting portion 20 as shown in FIG. It collects in the lower part of the sheave side abutting portion 20. Since the sheave side abutting portion 20 can be visually observed from the outside, the accumulated oil can be removed as necessary at the time of periodic inspection.

  According to the present embodiment, the peripheral edge 19 of the brake drum 9 has a substantially T-shaped cross section, whereby the pressing force of the brake lining 11 can be received efficiently and the brake drum 9 can be made highly rigid. Further, it is possible to prevent the oil adhering to the side surface of the brake drum from reaching the outer peripheral braking surface 12 without adding new parts, and to improve the braking force. In particular, the portion having the oil groove function is effective by being present between the sheave 8 and the outer peripheral braking surface 12, but in order to exhibit the function as the oil groove with respect to the oil adhered to the inside from the portion, The closer the position is to the outer peripheral braking surface 12, the greater the effect. In the present embodiment, the sheave side abutting portion 20 serving as an oil groove is inevitably located at a position close to the outer peripheral braking surface 12, so that it is very effective as an oil adhesion preventing structure for the outer peripheral braking surface 12. Furthermore, the dead space in the space surrounded by the casing 7 and the brake drum 9 can be reduced by disposing the motor rotor 21 in the space of the anti-sheddle side butting portion 22 having a substantially T-shaped structure. . Accordingly, it is possible to realize an effective downsizing / thinning of the thin hoisting machine 6.

  In the above-described embodiment, the thin hoisting machine 6 employing the outer rotor type motor has been described as an example. However, the present invention is not limited thereto, and may be applied to a thin hoisting machine employing the inner rotor type motor. it can. In this case, the thickness dimension can be effectively reduced by disposing the motor stator supported by the housing in the space of the anti-shelter side abutting portion.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Guide rail 3 Car 4 Guide rail 5 Balance weight 6 Thin hoisting machine 7 Case 8 Sheave 9 Brake drum 10 Electromagnetic brake 11 Brake lining 12 Outer peripheral braking surface 13 Main shaft 14 Bearing 15 Movable side housing 16 Seal material 17 Annular concave part 18 Motor stator 19 Peripheral part 20 Sheave side abutting part 21 Motor rotor 22 Anti sheave side abutting part 23 Brake drum minimum thickness part

Claims (3)

A housing that supports the suspension load, a main shaft that is cantilevered and supported by the housing, a brake drum that is rotatably supported via a bearing that is fixed to the other end of the main shaft, and the brake drum A sheave that rotates integrally; and an electromagnetic brake that is disposed outside the brake drum, wherein the brake lining of the electromagnetic brake is brought into pressure contact with an outer peripheral braking surface of the brake drum, and the brake drum and the sheave In the elevator hoisting machine that brakes the rotation,
The width dimension orthogonal to the axial rotation direction of the outer peripheral braking surface of the brake drum is made larger than the minimum thickness dimension of the brake drum, and the brake drum minimum thickness portion is orthogonal to the axial rotation direction of the outer peripheral braking surface. A thin hoisting machine for an elevator provided in a projection plane and having a peripheral portion of the brake drum having a substantially T-shaped cross section.   The elevator groove according to claim 1, wherein an opening angle of a sheave side abutting portion of the brake drum having a substantially T-shaped cross section is an acute angle, and an oil groove for collecting oil transmitted from a side surface of the brake drum is formed. Thin hoisting machine.   2. A thin hoisting machine for an elevator according to claim 1, wherein a motor rotor is fixed to a butt portion on the side opposite to the sheave of the brake drum having a substantially T-shaped cross section.