JP4901146B2 - elevator - Google Patents

Description

  The present invention relates to an elevator including a machine room in which a hoisting machine is installed.

  The elevator hoisting machine is installed in a machine room provided on a hoistway in which a car goes up and down. Further, as described in Japanese Patent Application Laid-Open No. 2001-31349 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2001-48448 (Patent Document 2), the machine room is accommodated in the horizontal projection plane of the hoistway to reduce the size. Technology is known.

JP 2001-31349 A JP 2001-48448 A

  In the elevator described in Patent Document 1, since there is no pulley, the position of the counterweight is determined by the position of the motor, and the degree of freedom in designing the machine room layout is small. In the elevator described in Patent Document 2, the position of the counterweight can be freely designed by the pulley, but it is difficult to secure the traction performance with the rope because the angle at which the rope is wound around the motor is small. It is. In order to supplement the traction performance, the hoisting machine needs to have a speed reduction mechanism or employ a motor with a large output torque to increase the pulley diameter. This increases the size of the hoisting machine, and there is a problem that a sufficient maintenance space cannot be secured in a small machine room.

  In addition, the hoisting machines are becoming larger due to the increase in the speed and capacity of the elevator accompanying the increase in the number of buildings. For this reason, also in a general conventional machine room, it is difficult to secure a maintenance space, and the degree of freedom in machine room layout design is reduced.

In an elevator according to the present invention, a hoistway, a machine room positioned on the hoistway, a hoisting machine provided in the machine room, a first pulley and a second pulley provided by being rotatably supported in the machine room And a car and a counterweight that move up and down in the hoistway, and a rope that hangs the car and the counterweight and is wound around the sheave of the hoist and the first and second pulleys. In the elevator, the directions of the ropes on both sides away from each of the first and second pulleys and the sheave are the same in the vertical direction, and one of the first and second pulleys is connected to the hoisting machine. Provided at a position higher than the sheave, provided the other at a position lower than the sheave, the rope hung the upper end of the car, and then entered the machine room upward, Over Bed, the first pulley, wound around the second pulley, then back to the hoistway downwardly, and wherein the hanging the upper portion of the counterweight.

  According to the present invention, the first and second pulleys and the sheaves of the hoisting machine are arranged close to each other in the horizontal projection plane. In addition, by changing the arrangement of the sheave and each pulley while maintaining the direction in which the ropes are separated, the degree of freedom in designing the position of the counterweight in the horizontal projection plane can be increased. Accordingly, the degree of freedom in designing the machine room layout is improved while securing a maintenance space in the machine room.

  FIG.1 and FIG.2 shows the elevator which is one Embodiment of this invention. Specifically, FIG. 1 shows a vertical section when the machine room 7 and the hoistway 14 are viewed from the side of the car 15, and FIG. 2 shows a vertical section when viewed from the front of the car 15, that is, from the landing direction. In the present embodiment, the machine room 7 is located on the hoistway 14, and a wall forming the machine room 7 is provided on an extension of the wall of the hoistway 14. In other words, the horizontal projection surface of the machine room 7 and the horizontal projection surface of the hoistway 14 overlap almost entirely, and the horizontal projection area of the machine room 7 is substantially equal to the horizontal projection area of the hoistway 14. Therefore, the machine room is downsized.

In the machine room 7 of the present embodiment, a hoisting machine 1 having a sheave 2 and a shaft 3 is installed on a beam 4 mounted on beams 5 and 6 fixed to the floor surface of the machine room 7. Yes. Further, a pulley 8 having a shaft 9 is rotatably supported at the lower part of the beam 4 by a pulley bracket 10. The pulley 12 having the shaft 13 is rotatably supported by a pulley frame 11 that is connected to the beam 4 and stands on the beam 4. Accordingly, the pulley 8 is located below the sheave 2 and the pulley 12 is located above the sheave 2. On the other hand, in the hoistway 14, the car 15 and the counterweight 16 located behind the car 15 as viewed from the landing direction move up and down. One end of the rope 17 is fixed to the upper part of the hoistway 14, and is wound around a pulley 18 provided at the upper end of the car 15 to hang the car 15 downward. Further, the rope 17 goes upward and enters the machine room 7, and then is wound around the sheave 2, the pulley 8, and the pulley 12, and returns downward into the hoistway 14. The counterweight 16 is wound around the pulley 19 and is suspended from the counterweight 16. The other end is fixed to the upper part of the hoistway 14.

  In the order in which the rope 17 passes in the machine room 7, the hoisting machine 1 with the shaft 3 substantially horizontal, the pulley 8 with the shaft 9 substantially horizontal at a position lower than the hoisting machine 1, and the hoisting machine 1 The pulley 12 having the shaft 13 substantially horizontal at a higher position is disposed, and the directions of the ropes 17 on both sides away from the pulley 8, the pulley 12, and the sheave 2 are all the same in the vertical direction, that is, in the same direction with respect to the upper and lower sides. ing. That is, the axes of the pulley 8, the pulley 12, and the sheave 2 are arranged substantially horizontally, and the pulley 12, the axis of the pulley 12 is arranged higher than the axis of the sheave 2 of the hoist 1. The axis of the pulley 8 is disposed at a position lower than the axis of the sheave 2. For this reason, the hoisting machine, the sheave, and the pulleys are arranged close to each other in the horizontal projection plane of the machine room.

  FIG. 3 is a perspective view of the machine room in the embodiment of FIGS. 1 and 2. FIG. 4 is a horizontal sectional view showing the layout configuration of the pulleys and the hoisting machine in the machine room according to the embodiment viewed from above the machine room. However, the illustration of the rope is omitted in FIG.

  3 and 4, the shaft 3 to which the sheave 2 of the hoist 1 is attached, the shaft 9 of the pulley 8 and the shaft 13 of the pulley 12 are oriented horizontally, and the directions of the rotating surfaces of the sheave 2 and the pulley 8 are substantially the same. And the shaft 13 of the pulley 12 is arranged substantially perpendicular to the shaft 3 of the sheave 2 and the shaft 9 of the pulley 8. The rope 17 connected from the car 15 reaches the counterweight 16 from the sheave 2 through the pulley 8 and the pulley 12. The portion of the rope 17 that connects the sheave 2 and the pulley 8 is disposed so as to form an angle that is substantially vertical. Moreover, the part which connects the pulley 8 and the pulley 12 in the rope 17 is arrange | positioned so that the angle close | similar to vertical may be formed as much as possible. At this time, in the sheave 2, the pulley 8 and the pulley 12, the portions around which the rope is wound are the upper half of the sheave 2, the lower half of the pulley 8, and the upper half of the pulley 12. As seen in the direction of rotation of the sheave 2, pulley 8 and pulley 12 in FIG. 1, when the car 15 rises, the sheave 2 rotates to the right and the pulley 8 rotates to the left. The pulley 12 rotates from the near side to the other side. When viewed from the same region delimited by the rope 17 in the horizontal projection plane, that is, from the right side of the viewpoint in FIG. 1, the rotation direction of the pulley 12 is the right direction. (In FIG. 2, the rotation direction of the pulley 12 is the left direction.) That is, when viewed from the same side of each rotation surface, the rotation direction is the right, left, right direction, or reverse in the order of engagement with the rope. Left, right, left when moving direction. Thereby, the freedom degree of a layout design can be improved, arrange | positioning a winding machine and each pulley closely.

  In the present embodiment, the winding angle of the rope 17 on the sheave 2 is approximately 180 degrees by disposing the pulley 8 below the hoisting machine 1 and bringing it close to the sheave 2 (within the horizontal projection plane). Can be secured. By setting this winding angle large, the traction of the hoisting machine 1 can be efficiently transmitted by the rope 17, so that the diameter of the sheave 2 can be reduced. Therefore, the size of the entire hoist including the sheave can be reduced, and a sufficient space for maintenance work of equipment installed in the machine room can be secured. In addition, the hoisting machine and the two pulleys can all be accommodated in the machine room although the machine room is made smaller by making the horizontal projection area of the machine room substantially the same as the horizontal projection area of the hoistway.

  In this embodiment, as shown in FIG. 3, the hoist 1 has a relatively flat shape. That is, the hoist 1 has a thin shape in which the width in the direction parallel to the rotation surface of the sheave 2 is larger than the thickness in the direction perpendicular to the rotation surface. Thereby, an area required for installing the hoisting machine in the machine room is reduced, and a further maintenance work space is secured.

  Moreover, in this embodiment, since the length of the rope 17 of the part which connects the pulley 8 and the pulley 12 can be enlarged by installing the pulley 12 in a position higher than the hoisting machine 1, the life of the rope can be increased. There is also an effect that it can be kept for a long time.

In this embodiment, the pulley 18 and the pulley 19 are respectively provided on the upper part of the car 15 and the counterweight 16, and a 2: 1 roping configuration is shown. However, instead of this, pulleys 18 and 19 are used. A configuration of 1: 1 roping in which both ends of the rope 17 are directly attached to the car 15 and the counterweight 16 may be employed. Further, the horizontal projection area of the machine room may be narrower than the horizontal projection area of the hoistway, or may be slightly wide enough not to impair downsizing of the machine room.

  Hereinafter, other embodiments of the present invention will be described focusing on differences from the above embodiments.

FIG. 5 shows an elevator according to another embodiment of the present invention. However, the illustration of the rope is omitted in FIG. In the present embodiment, the depth size of the car 15 is set larger than that in the embodiment of FIG. An angle α formed between the shaft 13 of the pulley 12 and the shaft 9 of the pulley 8 and the shaft 3 of the hoist 1 in the horizontal projection plane is an acute angle. That is, the shaft 13 of the pulley 12 is arranged non-parallel to the shaft 9 of the pulley 8 and the shaft 3 of the hoisting machine 1 in the horizontal projection plane. According to the embodiment of FIG. 5, it is possible to easily cope with the difference in the machine room layout based on the difference in the shape of the hoistway.

  FIG. 6 shows still another embodiment of the present invention, and shows a so-called side-fall type elevator in which a counterweight is arranged on the side of the car as viewed from the landing direction. However, the illustration of the rope is also omitted in FIG. The shaft 3 of the hoisting machine 1 to which the sheave 2 is attached, the shaft 9 of the pulley 8 and the shaft 13 of the pulley 12 are all horizontally oriented, and the shaft 9 and the shaft 13 are arranged parallel to each other and perpendicular to the shaft 3 To place. According to the present embodiment, the hoisting machine and each pulley can be accommodated in the machine room even in the case of the falling type, even if the horizontal projection area of the machine room is reduced to substantially the same as the horizontal projection area of the hoistway 14. And the degree of freedom of layout in the machine room can be improved.

  FIG. 7 shows a vertical section of an elevator according to still another embodiment of the present invention. The sheave 2 attached to the hoisting machine 1 is disposed between the pulley 8 and the pulley 12, and the shaft 9 of the pulley 8 and the shaft 13 of the pulley 12 are disposed at substantially the same height. That is, the axes of the pulley 8 and the pulley 12 are arranged at a height that is higher than and substantially the same as the axis of the sheave 2 of the hoist 1. Both the shaft 9 and the shaft 13 are attached to the beam 4. The beam 4 is fixed to the floor surface of the machine room 7 by column members 20 and 21. Since the hoisting machine 1 has a relatively large mass compared to a pulley or the like, the hoisting machine 1 is installed near the floor of the machine room 7 in order to facilitate maintenance. According to this embodiment, since the pulley shafts 9 and 13 are supported by the beam 4 which is a single member, the support structure can be further simplified. Therefore, maintenance space can be secured and maintenance work can be facilitated.

FIG. 8 shows still another embodiment of the present invention, and shows a horizontal cross section of the machine room of a so-called lift type elevator in which pulleys (18a, 18b) are attached under the car. Also in FIG. 8, the illustration of the rope for suspending the passenger car and the counterweight is omitted. The shaft 3 of the hoisting machine 1 is oriented obliquely with respect to the machine room and the hoistway wall, and one end of the side of the sheave 2 attached to the hoisting machine 1 is substantially the outer end of the pulley 18b. Arranged directly above. The pulley 8 is installed so that one end is adjacent to the other end of the sheave 2, and the pulley 12 is installed so that one end is adjacent to the other end of the pulley 8. In the present embodiment, the sheave shaft 3, the shaft 9 of the pulley 8 and the shaft 13 of the pulley 12 are arranged in parallel to each other. It is possible to arrange them in parallel.

  According to the embodiment of FIG. 8, in the elevated elevator, the horizontal projection area of the machine room is made to be the same as or substantially the same as the horizontal projection area of the hoistway by appropriately arranging the pulleys. Can do. If an environment where there is no inconvenience in installation such as waterproofing of the machine room is obtained, a hoisting machine with a relatively larger mass than other parts is placed near the floor of the machine room to improve maintainability. Can be improved.

  The arrangement configuration of the hoisting machine and each pulley in the above embodiment can be applied to a general machine room in which the horizontal projection area of the machine room is larger than the horizontal projection area of the hoistway, and the same effect is produced. Moreover, the said embodiment can be used in combination as appropriate.

  The present invention is not limited to the above embodiments, and various modifications are possible within the scope of the technical idea of the present invention. For example, the shape of the hoisting machine is not limited to a flat or thin shape, but may be a body length, that is, a shape whose dimension in a direction perpendicular to the rotating surface of the sheave is larger than a dimension in a direction parallel to the rotating surface. Further, the number of pulleys may be increased as appropriate.

The vertical sectional view which looked at the elevator which is one Embodiment of this invention from the side surface. The vertical sectional view which looked at the elevator which is one Embodiment of this invention from the front. FIG. 3 is a perspective view of a machine room in the embodiment of FIGS. 1 and 2. The layout structure in the machine room of embodiment of FIG.1 and FIG.2. The elevator which is other embodiment of this invention. A fall-down type elevator which is still another embodiment of the present invention. The vertical cross section of the elevator which is further another embodiment by this invention. The machine room horizontal cross section of the raising type elevator which is further another embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Hoisting machine, 2 ... Sheave, 3, 9, 13 ... Shaft, 4, 5, 6 ... Beam, 7 ... Machine room, 8, 12, 18, 19 ... Pulley, 10 ... Pulley bracket, 11 ... Pulley frame , 14 ... hoistway, 15 ... ride car, 16 ... counterweight, 17 ... rope, 20, 21 ... pillar member.

Claims (4)

A hoistway, a machine room positioned on the hoistway, a hoisting machine provided in the machine room, a first pulley and a second pulley provided rotatably supported in the machine room, and the hoistway An elevator comprising a car and a counterweight that lifts and lowers, and a rope that suspends the car and the counterweight and is wound around the sheave of the hoist and the first and second pulleys,
Ri same direction der direction with respect to the upper and lower sides of the rope away from each of said first and second pulleys and the sheave, than the first and second of said sheave of said traction machine to one of the pulleys And the other is provided at a position lower than the sheave. The rope suspends the upper end of the car and enters the machine room upward, then the sheave and the first pulley. The elevator is wound around the second pulley, then returns downward to the hoistway, and suspends the upper end of the counterweight .   2. The first and second pulleys and the axes of the sheaves are arranged substantially horizontally, and one axis of the first and second pulleys is more than the axis of the sheaves. The elevator characterized in that it is arranged higher and the other axis is arranged lower than the axis of the sheave. 3. The shaft according to claim 1, wherein one of the first and second pulleys is arranged non-parallel to the other shaft or the shaft of the hoisting machine. elevator. The elevator according to any one of claims 1 to 3 , wherein a horizontal projection area of the machine room is substantially equal to a horizontal projection area of the hoistway.

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