JP2012153445A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device equipped with a simple and lightweight pulley unit which has sufficient strength for a large-capacity elevator.SOLUTION: The elevator device includes: a pulley 5; a pulley shaft 13 rotatably supporting the pulley 5; and a holding member 12 holding the pulley shaft 13. The holding member 12 has an L-shaped cross section, and includes a through planar portion 12a through which the pulley shaft 13 passes; and a projection 12b projecting laterally from the through planar portion 12a. The holding member 12 is disposed with the projection 12b located in a loading direction in which a moving body is suspended by winding a rope 3 around the pulley 5 with respect to the pulley shaft 13 passing through the through planar portion 12a. The pulley shaft 13 is held, with respect to the holding member 12, with the circumferential surface of the pulley shaft 13 in contact with the projection 12b while passing through the through planar portion 12a.

Description

  The present invention relates to a pulley holding structure of an elevating body suspended by a rope being wound around.

  There is a method of suspending a car, which is an elevator body of an elevator device, with a rope. In this method, a pulley was attached to the car, and a rope was wound around the pulley to suspend the car. The pulley shaft was held by a holding member attached to the car. The cross section of the holding member that holds the pulley shaft has a horizontal protruding portion that protrudes outward and a vertical plane that holds the pulley shaft. The pulley shaft is held by a hole formed near the center of the vertical plane portion of the holding member.

JP 2005-200137 A JP-A-9-295777 Japanese Utility Model Publication No. 54-128257

  In the conventional pulley holding methods shown in Patent Document 1 and Patent Document 2, when the elevator has a large capacity and the load applied to the pulley shaft increases, an excessive load is applied to the vertical plane portion that holds the pulley shaft. The holding portion held by the thin flat portion is damaged, and the pulley unit has a short life. Therefore, conventionally, it has been dealt with by adding a reinforcing material to the pulley unit or by using the structure shown in Patent Document 3.

  However, as described above, when the reinforcing member is added to the pulley unit, the weight of the pulley unit increases, and as a result, the weight of the car increases. This increases the load on the rope and shortens the life of the rope. Further, by adding reinforcement to the pulley unit, the structure is complicated, such as an increase in the number of parts, which causes an increase in work processes during installation work.

  On the other hand, in the configuration of Patent Document 3, it is necessary to form a member that holds the pulley shaft with a mold or the like, or to cut out and shape it, resulting in poor production efficiency and high cost. Further, since the weight of the member itself is heavy, the same problem as the problem due to the reinforcing material of shortening the life of the rope due to the increase in the weight of the pulley unit and the increase in the weight of the car arises.

  The present invention has been made paying attention to such points, and an object of the present invention is to provide an elevator apparatus having a strength that can be applied to a large-capacity elevator and having a simple and lightweight pulley unit. It is in.

  In order to achieve the above object, an elevator apparatus according to the present invention is provided in the lifting body having a lifting body that moves up and down in a hoistway, a rope that suspends the lifting body, and a pulley around which the rope is wound. In the elevator apparatus provided with the driven pulley unit and a drive device that drives the rope to raise and lower the lifting body, the pulley unit includes the pulley, a pulley shaft that rotatably supports the pulley, A holding member that holds the pulley shaft, the holding member having an L-shaped cross section, and a through-plane portion through which the pulley shaft passes and a protruding portion that protrudes laterally from the through-plane portion. And the protrusion is positioned in a direction in which a load is applied to the pulley shaft that passes through the through-plane portion and the rope is wound around the pulley and the lifting body is suspended. Are, the pulley shaft with respect to the holding member, as well as through the through-plane portion, characterized in that the peripheral surface of the pulley shaft is held in contact with the protruding portion.

  ADVANTAGE OF THE INVENTION According to this invention, the elevator apparatus which has the intensity | strength which can respond also to a large capacity elevator, and was equipped with the simple and lightweight pulley unit can be provided.

It is a hoistway sectional view which shows the whole elevator apparatus outline in this embodiment. It is a front view which shows the outline | summary of the passenger car of the elevator apparatus in this embodiment. It is sectional drawing in the AA straight line in FIG. It is an enlarged front view which shows the outline | summary of the pulley unit in this embodiment. It is sectional drawing in the BB straight line in FIG.

  Hereinafter, the present invention will be described in detail by taking an embodiment of the present invention as an example.

  FIG. 1 is a cross-sectional view of a hoistway showing an overall outline of an elevator apparatus in the present embodiment. In the elevator apparatus 1 shown in the figure, a hoisting machine as a driving device is installed in an upper part of a hoistway 19, and the hoisting machine is provided with a sheave 2. A rope 3 is wound around the sheave 2 of the hoist. In addition, the rope 3 holds a car 4 and a counterweight 6 which are lifting bodies. One end of the rope 3 is locked to the upper part of the hoistway 19 and extends downward. The rope 3 is wound around the pulley 5 provided in the car 4 and turned upward, and is wound around the sheave 2 of the hoisting machine. Within the hoistway 19, the car 4 and the counterweight 6 are wound around a deflecting wheel 18 that holds the weight 6 at an appropriate distance and extends downward. The other end is locked to the upper part of the hoistway 19.

  The elevator car 4 and the counterweight 6 that are lifted and lifted in this way operate the hoisting machine that is the driving device to rotate the sheave 2 and the rope 3 is driven to move the hoistway 19 up and down. Drive in the opposite direction.

  FIG. 2 is a front view showing an outline of a car of the elevator apparatus in the present embodiment. As shown in FIG. 2, the car 4 includes a car frame 7 and a car room 11 installed in the car frame. The car frame 7 includes a pair of upright beams 9, a lower beam 10 installed between the lower portions of the upright beams 9, and an upper beam 8 installed between the upper portions.

  3 is a cross-sectional view taken along a line AA in FIG. As shown in the figure, the upper beam 8 is composed of a pair of U-shaped beam members spaced apart from each other and facing each other, and a pulley having a pulley 5 for winding the rope 3 around the lower surface of the intermediate part of these beam members. A unit 15 is provided. The pulley unit 15 has a structure covered with a pulley cover 16 as shown in FIGS.

  FIG. 4 is an enlarged front view showing an outline of the pulley unit in the present embodiment. In addition, the figure is a see-through | perspective view which permeate | transmitted the pulley cover 16 for description. As shown in FIG. 4, the pulley unit 15 is attached to the lower surface of the upper beam 8 of the car frame 7 having a U-shaped cross section. Since the pulley cover 16 in this embodiment covers the pulley unit 15, dustproof, soundproofing and safety of the pulley unit 15 are ensured. The size of the pulley cover 16 has a structure that depends on the size of the pulley unit. Therefore, by simplifying and downsizing the structure of the pulley unit 15, the structure of the pulley cover 16 can also be simplified and downsized, and the weight can be reduced.

  5 is a cross-sectional view taken along the line BB in FIG. In addition, this figure is also a perspective view through which the pulley cover 16 is seen for explanation. The pulley unit 15 includes a pulley 5, a pulley 13 shaft that rotatably supports the pulley 5, a pair of holding members 12 that hold the pulley shaft 13, and a pair of holding members 12 and a pair of upper beams. 8 is provided with a vibration isolator 14 disposed between the two.

  The holding member 12 has an L-shaped cross section, and has a penetrating flat surface portion 12a through which the pulley shaft 13 penetrates and a protruding portion 12b protruding sideways from the penetrating flat surface portion 12a. The holding member 12 is separated from each other. Opposed and attached to the beam material of the upper beam 8 of the car frame 7 via a vibration isolator 14. As shown in FIG. 4, the vibration isolator 14 is installed between the upper beam 8 and the holding member 12 along the longitudinal direction of the holding member 12, that is, the direction perpendicular to the axial direction of the pulley shaft 13 holding the car pulley 5. Has been. Then, the anti-vibration rod 17 is passed through a hole opened in the horizontal portion of the upper beam 8 and the holding member 12 and fastened with a nut, so that the upper beam 8 and the holding member 12 are fastened via the anti-vibration material 14. Fixed.

  A rope 3 is wound around the pulley 5 of the pulley unit 15 when the elevator apparatus 1 is installed, and the car 4 is suspended in the hoistway by the rope 3. At this time, the weight of the car 4 of the elevator apparatus 1 is loaded on the pulley shaft 13 of the pulley 5 around which the rope 3 is wound and the holding member 12 of the pulley unit 15 that holds the pulley shaft 13. Therefore, when the elevator apparatus has a large capacity and its own weight increases, an excessive load is applied to the holding member 12 of the pulley unit 15.

  For this reason, the pulley unit 15 of the present embodiment first moves the rope 3 around the pulley shaft 13 that passes through the through flat surface portion 12a and moves it up and down in order to distribute and hold the weight of the car 4 in a distributed manner. It arrange | positions so that the load which suspends the car 4 which is a body may be applied, ie, the protrusion part 12b may be located upwards in this embodiment. In the pulley unit of the present embodiment, the pulley shaft 13 penetrates the holding flat surface 12a with respect to the holding member 12, and the peripheral surface of the pulley shaft 13 is held in contact with the protruding portion 12b. Yes. As a result, the load from the pulley shaft 13 can be held by the horizontal protrusion 12 b of the holding member 12. Conventionally, the load from the pulley shaft 13 is held only by the plane section of the holding member 12 in the vertical direction, that is, the through plane section 12a. Therefore, since the surface for holding the load of the pulley shaft 13 is only the through flat surface portion 12a of the holding member 12, a sufficient cross-sectional area cannot be secured, and the contact point between the pulley shaft 13 and the hole of the holding member 12 is excessive. There was a load. Therefore, in the present embodiment, the load from the pulley shaft 13 is held at the portion where the horizontal protruding portion 12b of the holding member 12 and the pulley shaft 13 are in line contact, and the pulley shaft 13 has a wider area than the conventional one. It is set as the structure which can hold | maintain the load of. Thereby, the force retained from the pulley shaft 13 can be dispersed. Further, since the holding member 12 has an L-shaped cross section, the protruding portion 12b is difficult to bend and deform even when the load of the pulley shaft 13 is received by the protruding portion 12b together with the through flat surface portion 12a.

  In addition, in the case of a large capacity elevator, two anti-vibration members 14 attached between the upper beam 8 and the holding member 12 of the pulley unit 15 are attached to the separated beam members of the upper beam 8 respectively. . That is, the holding member 12 has two surfaces sandwiching the pulley shaft 13 in the state shown in FIG. 4 when viewed from the axial direction of the pulley shaft 13 on the surface opposite to the contact surface of the protruding portion 12b with the pulley shaft 13. The structure is fixed through a vibration isolator 14. Thus, by installing the vibration isolator 14 at a position close to the portion that holds the load of the pulley shaft 13, the force that the holding member 12 holds from the pulley shaft 13 can be dispersed by the vibration isolator 14. In the present embodiment, the holding member 12 is subjected to a force that bends and deforms toward the upper side of the pulley shaft 13 due to the load received by the protruding portion 12 b. Then, a force to deform downward is exerted on both sides of the pulley shaft 13. However, since the anti-vibration rod 17 is fixed via the two anti-vibration members 14 with the pulley shaft 13 in between, the movement to deform downward on both sides of the pulley shaft 13 is performed. It is possible to prevent and receive it with a simple structure against a larger load.

  In the conventional structure, the holding member 12 has a U-shaped cross section. In the case of the U-shape, the strength of the holding member 12 is sufficient, but the weight increases as the cross-sectional area increases. In this embodiment, this cross-sectional shape is L-shaped. When the L-shape is used, the weight can be reduced by reducing the cross-sectional area, and the manufacturing cost can be reduced. In addition, by reducing the number of protrusions, the workability of installation work such as rope hanging work and maintenance management work is improved.

  In the present embodiment, the example of 2: 1 roping has been described. However, the present invention is not limited to this, and may be applied to any configuration having a pulley around which a rope for suspending a lifting body is wound. Is possible.

  Moreover, in this embodiment, the direction in which the load is applied to the pulley 5 that wraps the rope 3 around the pulley shaft 13 that penetrates the through-plane portion 12a and suspends the elevator car 4 that is a lifting body is upward. However, the direction in which the load suspended by the rope 3 is applied may be downward. In that case, the protruding portion 12b may be disposed below.

  Further, in the present embodiment, the car 4 is described as an example of the lifting body, but the structure for holding the pulley 20 of the counterweight 6 as the lifting body is configured in the same manner as the pulley unit 15 described in the present embodiment. You can also

  Further, in the present embodiment, an example of a structure in which the horizontal protruding portion 12b of the holding member 12 and the pulley shaft 13 are in line contact has been described. If comprised in this way, since the load concerning the pulley shaft 13 can be received in a wider area, it is possible to ensure sufficient strength with a simple and lightweight structure, and it can be used conveniently for installation and the like. It is a shape that can be. However, according to the present invention, if there is no problem with the installation method or the like, the through-plane portion 12a is perpendicular to the peripheral surface of the pulley shaft 13 at the periphery of the through-shaft portion 13a of the through-plane portion 12a as in this embodiment. In addition to holding the pulley shaft 13 by the penetrating plane part 12a by bending the projecting part 12b or projecting the projecting part 12b at an acute angle from the penetrating plane part 12a. If it is made into the structure which contacts the peripheral surface of the pulley axis | shaft 13 with 12b and can receive a load also in a protrusion part besides the penetration plane part 12a, intensity | strength can be increased with a simple and lightweight structure.

  Moreover, in this embodiment, the protrusion part 12b of the holding member 12 demonstrated and demonstrated the example provided in the opposite surface to the pulley opposing side of the penetration plane part 12a. By comprising in this way, the space which installs the pulley 5 can be suppressed to the required minimum, and it can contribute to weight reduction. However, in the present invention, the protruding portion 12b of the holding member 12 may be provided on the surface of the penetrating flat surface portion 12a facing the pulley. If the projecting portion 12b that projects vertically from the penetrating plane portion 12a is provided on the periphery of the penetrating portion of the pulley shaft 13 of the penetrating plane portion 12a so as to contact the peripheral surface of the pulley shaft 13, the pulley shaft It is possible to maximize the area where the line 13 and the protruding portion 12b are in line contact with each other, and the strength can be increased with a simple and lightweight structure.

DESCRIPTION OF SYMBOLS 1 Elevator apparatus 2 Sheave 3 Rope 4 Car 5,20 Pulley 6 Balance weight 7 Car frame 8 Upper beam 9 Standing beam 10 Lower beam 11 Car chamber 12 Holding member 13 Pulley shaft 14 Vibration isolator 15 Pulley unit 16 Pulley cover 17 Shaking rod 18 Baffle 19 Hoistway

Claims (3)

A lifting body that moves up and down in the hoistway, a rope that suspends the lifting body, a pulley unit that is provided on the lifting body that has a pulley around which the rope is wound, and drives the rope to move the lifting body In an elevator apparatus provided with a drive device that moves up and down,
The pulley unit includes the pulley, a pulley shaft that rotatably supports the pulley, and a holding member that holds the pulley shaft,
The holding member has an L-shaped cross section, and has a penetrating plane part through which the pulley shaft penetrates and a projecting part protruding laterally from the penetrating plane part. On the other hand, the rope is wound around the pulley and arranged so that the protrusion is positioned in a direction in which a load is applied to suspend the lifting body,
The elevator apparatus according to claim 1, wherein the pulley shaft passes through the penetrating flat portion with respect to the holding member, and the peripheral surface of the pulley shaft is held in contact with the protruding portion.   The elevator apparatus according to claim 1, wherein the protruding portion of the holding member is provided on a surface opposite to the pulley facing side of the through-plane portion.   3. The elevator device according to claim 1, wherein the holding member is a surface opposite to a contact surface of the protruding portion with the pulley shaft when viewed from an axial direction of the pulley shaft. An elevator apparatus characterized by being fixed via two vibration-proofing materials with a pulley shaft interposed therebetween.

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