WO2004005177A1

WO2004005177A1 - Elevator device

Info

Publication number: WO2004005177A1
Application number: PCT/JP2002/006902
Authority: WO
Inventors: Naoki Hashiguchi
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2002-07-08
Filing date: 2002-07-08
Publication date: 2004-01-15
Also published as: JPWO2004005177A1; CN1251954C; EP1520830A4; JP4170290B2; EP1520830A1; KR100551616B1; CN1582251A; KR20040083054A; EP1520830B1

Abstract

An elevator device, comprising a hoist installed on the rear wall surface of a hoistway in depth direction with the shaft of the motor part thereof positioned orthogonal to the rear wall surface and a return wheel disposed in a clearance between a cage and one lateral side wall surface of the hoistway rotatably around a horizontal shaft, joined to the drive pulley of the hoist through a hoist rope, and changing the rope arrangement direction of the hoist rope, wherein the rope groove pitch of the return wheel is formed larger than the rope groove pitch of the drive pulley, whereby, since the thickness of the drive pulley can be reduced by increasing the rope groove pitch of the return wheel joined to the drive pulley through the hoist rope and changing the rope arrangement direction of the hoist rope larger than that of the drive pulley, a clearance between the cage and the wall surface of the hoistway can be reduced to reduce a construction cost.

Description

Specification

Elevator equipment Technical field

The present invention relates to an elevator apparatus in which a machine room is omitted, and more particularly to an elevator apparatus in which a hoist is arranged in a gap between a hoistway wall and a cab.

Background art

9 is a cross-sectional view showing a conventional elevator apparatus, FIG. 10 is an enlarged view of a portion A in FIG. 9, and FIG. 11 is a longitudinal sectional view showing the conventional elevator apparatus. Here, for convenience of explanation, the length direction of the hoistway (the direction orthogonal to the paper surface in FIG. 9) is the up-down direction, the depth direction of the hoistway (the left-right direction in FIG. 9) is the front-rear direction, and the width of the hoistway is The direction (vertical direction in Fig. 9) is the horizontal direction.

In each of the figures, the hoisting machine 1 is composed of a motor section 2 and a drive sheave 3 fixed to the rotating shaft of the motor section 2, and as a whole a flat disk in the axial direction of the rotating shaft of the motor section 2. It is configured in a shape. The hoisting machine 1 is mounted in a gap between the car room 5 on the lower rear wall of the drive hoistway 4 with the rotating shaft of the motor unit 2 facing in the front-rear direction. The car room 5 is guided by a pair of car guide rails 6 extending vertically on both right and left wall surfaces of the hoistway 4, and is arranged so as to be able to move up and down. The car room 5 is disposed in the hoistway 4 with the car door 5 a facing the front of the hoistway 4. In addition, a pair of car hanging cars 7 a and 7 b are rotatably mounted at substantially the center in the front-rear direction of the left and right ends of the lower end of the car room 5 so as to be rotatable around an axis whose axial direction is the front-rear direction.

The counterweight 8 is guided by a pair of counterweight guide rails 9 extending vertically on the rear wall surface of the hoistway 4, and is disposed so as to be able to move up and down. A deflecting pulley 10 for a counterweight is mounted on the upper part of the counterweight 8 so as to be rotatable around an axis whose longitudinal direction is the axial direction.

The first and second return wheels 11 and 12 are mounted on the upper part of the hoistway 4 so as to be rotatable around an axis whose left and right sides are in the axial direction. The first and second return wheels 1 1 and 1 2 are arranged side by side in the front-rear direction in the gap B between the car room 5 and the left wall of the hoistway 4 and behind the car suspension car 7 a. Have been. Also, the third return car 1 3 is on hoistway 4 And in the gap S between the car room 5 and the rear wall surface of the hoistway 4 so as to be rotatable around an axis whose longitudinal direction is the axial direction. The third return wheel 13 is disposed between the counterweight turning sheave 10 and the drive sheave 3 as viewed from above. One end of the hoisting rope 14 is fixed to the ceiling of the hoistway 4. The hoisting rope 14 is lowered from the ceiling, passed through the car suspension car 7b, passes through the lower part of the car cabin 5, passes through the car suspension car 7a, and is then lifted to the second return carriage 12. Then, the hoisting rope 14 is lowered to the drive sheave 3 after passing through the second return wheel 12 and the first return wheel 11. Then, the hoisting rope 14 is passed through the drive sheave 3 and then raised to the third return sheave 13. Then, the hoisting rope 14 is passed through the third return wheel 13 to be lowered to the turning block 10 for the counterweight, passed through the turning block 10 for the counterweight, and then lifted up. Is fixed to the ceiling.

In the elevator apparatus thus configured, the motor section 2 of the hoisting machine 1 is drive-controlled by a control device (not shown), and the drive sheave 3 is rotationally driven. Then, the hoisting rope 14 is run by the drive sheave 3, and the car room 5 and the counterweight 8 are guided by the car guide rail 6 and the counterweight guide rail 9 to move up and down the hoistway 4.

Here, the winding port 14 is composed of a first rope 14a, a second rope 14b, and a third rope 14c. On the other hand, the drive sheave 3 and the first return sheave 11 have a thickness h0, and three ropes respectively containing the first to third ropes 14a, 14b, and 14c. Grooves 3a—3c, 11a—11c are formed at a pitch p0. Further, the rope grooves 3b and 11b are located at the center in the thickness direction of the drive sheave 3 and the first return sheave 11. The drive sheave 3 and the first return sheave 11 are arranged such that the rope groove directions are orthogonal to each other, and the ends of the rope grooves 3b and 11b coincide with each other in the vertical direction. Here, the arrangement direction of the drive sheave 3 and the rope groove 3a—3c, 11a-1c of the first return sheave 11 is the axial direction of the drive sheave 3 and the first return sheave 11 respectively. And coincides with the rope arrangement direction of the drive sheave 3 and the first return sheave 11.

Although not shown in detail, the second and third return wheels 12, 13, and the car suspension wheel 7a, 7b, the counterweight turning pulley 10 also has three rope grooves formed at a pitch p0 for accommodating the first to third ropes 14a, 14b, 14c, respectively. ing. The first and second return wheels 11 and 12 are arranged with the rope groove directions aligned. Further, the drive sheave 3, the third return sheave 13, and the deflecting pulley 10 for the counterweight are arranged so that the rope groove directions coincide with each other. Further, the car suspension carts 7a and 7b are arranged so that the rope groove directions coincide with each other, and the car suspension cart 7a and the second return carriage 12 are connected to each other.

-They are arranged with the groove directions orthogonal to each other.

When the hoisting rope 14 transfers from the drive sheave 3 to the first return sheave 11, the first rope 14a exits the rope groove 3a of the drive sheave 3, as shown in FIG. It extends upward at a predetermined inclination with respect to the rear up and down direction and transfers to the rope groove 1 1 a of the first return wheel 11, and the second rope 14 b comes out of the rope groove 3 b of the drive sheave 3 and then becomes true. Extends up to the 1 lb rope groove of 1st return wheel 1 1, and 3rd rope 14 c extends upward at a predetermined inclination with respect to the vertical direction after exiting from rope groove 3 c of drive sheave 3 Transfer to the rope groove 1 1c of the first return car 1 1 In other words, when the hoisting rope 14 transfers from the traction sheave 3 to the first return car 11, the arrangement direction of the first to third loops 14 a-14 c of the hoisting rope 14 is 90 degrees. Changed. When the gap δθ between the first to third ropes 14a to 14c is less than 0 in the transition section where the rope arrangement direction is changed, the ropes come into contact with each other, and the ropes wear and contact noise Therefore, the pitch p 0 of the rope grooves 3a—3c and 11a—11c is set so that the gap δθ is 1 mm or more.

In the conventional elevator apparatus configured as described above, if the number of ropes and the diameter of the ropes constituting the hoisting ropes 14 are constant, the thickness h 0 of the driving sheave 3 and the first return sheave 11 is determined by the rope Grooves 3a—3c, 11a-Determined by the pitch p0 of 11c. The gap S in the hoistway 4 is defined by the thickness H (= h + h0) of the hoist 1. Here, h is the thickness of the motor unit 2. The clearance B in the hoistway 4 is defined by a cab 5, a car guide rail 6, and a mounting member (not shown) such as a rail bracket for mounting the car guide rail 6 to the hoistway wall. .

Therefore, the thickness の of the hoisting machine 1 is minimum when the pitch ρ 0 is set so that the gap δ 0 is 1 mm. As a result, the gap S could not be reduced any more, the cross section of the hoistway could not be reduced, and the construction cost increased.

Disclosure of the invention

The present invention has been made in order to solve the above-mentioned problem, and is connected to a driving sheave via a hoisting rope and changes a rope groove pitch of a return sheave that changes a rope arrangement direction of the hoisting rope. An elevator system that can increase construction cost by reducing the gap between the car cabin and the hoistway wall by increasing the rope groove pitch of the drive sheave and reducing the thickness of the drive sheave. The purpose is to obtain.

An elevator apparatus according to the present invention is a drive sheave having a car room arranged in a hoistway so as to be able to move up and down, and a plurality of rope grooves for accommodating hoisting ropes for moving the car room up and down. A hoisting machine attached to the shaft of the hoistway so that the axis of the shaft is substantially perpendicular to the wall of the hoistway, and the hoisting rope And a return sheave connected to the drive sheave via the hoisting rope and changing the arrangement direction of the hoisting rope. The mouth groove groove is formed larger than the mouth groove groove pitch of the driving sheave.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a horizontal sectional view showing an elevator apparatus according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of part A of FIG.

FIG. 3 is a schematic diagram illustrating the effect of reducing the thickness of the drive sheave in the elevator apparatus according to the first embodiment of the present invention.

FIG. 4 is an enlarged view showing a main part of an elevator apparatus according to Embodiment 2 of the present invention. FIG. 5 is a schematic diagram illustrating the effect of reducing the thickness of the drive sheave in the elevator apparatus according to Embodiment 2 of the present invention.

FIG. 6 is a horizontal sectional view showing an elevator apparatus according to Embodiment 3 of the present invention. FIG. 7 is a longitudinal sectional view showing an elevator apparatus according to Embodiment 3 of the present invention.

FIG. 8 is a horizontal sectional view showing an elevator apparatus according to Embodiment 4 of the present invention. FIG. 9 is a horizontal sectional view showing a conventional elevator apparatus.

FIG. 10 is an enlarged view of a portion A in FIG. FIG. 11 is a longitudinal sectional view showing a conventional elevator apparatus.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Example 1

FIG. 1 is a horizontal sectional view showing an elevator apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged view of a portion A in FIG. In the drawings, the same or corresponding parts as those of the conventional elevator apparatus are denoted by the same reference numerals, and description thereof will be omitted.

In FIGS. 1 and 2, the hoisting machine 20 is composed of a motor section 2 and a drive sheave 21 fixed to the rotating shaft of the motor section 2. It has a disk shape that is flat in the axial direction. The hoisting machine 20 is attached to the lower rear wall of the hoistway 4 with the rotating shaft of the motor section 2 facing the front-rear direction.

The drive sheave 21 is formed with a thickness h1 and has three opening grooves 2 1a-2 1 for accommodating the first to third ropes 14a, 14b, 14c, respectively. c is formed at the pitch p1. On the other hand, the first return wheel 2 2 is formed with a thickness h 2 (> h 0) and has three rope grooves for accommodating the first to third ropes 14 a, 14 b, and 14 c, respectively. 22a-22c are formed with a pitch p2 (p2> p0). Further, the rope grooves 21b and 22b are respectively located at the center in the thickness direction of the drive sheave 21 and the first return sheave 22. The drive sheave 21 and the first return sheave 22 are arranged so that the rope groove directions are orthogonal to each other, and the ends of the rope grooves 21b and 22b are vertically aligned. I have. Also, the first and second return wheels 22 and 12 are arranged with the rope groove directions aligned, and the driving sheave 21 and the third return wheel 13 are arranged with the rope groove directions aligned. I have.

Other configurations are the same as those of the conventional elevator apparatus.

In the first embodiment, when the hoisting rope 14 transfers from the driving sheave 21 to the first return sheave 22, as shown in FIG. 2, the first rope 14a is connected to the rope groove of the driving sheave 21. After exiting from 21 a, it extends upward at a predetermined inclination with respect to the vertical direction and transfers to the rope groove 22 a of the first return wheel 22, and the second rope 14 b is the rope groove of the drive sheave 21 After exiting from 2 1 b, it extended right above and changed to the rope groove 2 2 b of the first return car 2 2, and the third exit 14 c exited from the rope groove 2 1 c of the drive sheave 2 1 Predetermined for the rear vertical direction It extends upward at an angle and gets on the mouth groove 2 2 c of the first return wheel 22. As a result, the rope arrangement direction of the hoisting rope 14 can be changed by 90 degrees. In the transition section where the rope arrangement direction is changed, the rope grooves 2 la—2 1c, 2 2 are so arranged that the gap δ between the ropes of the first to third ropes 14a—14c is at least l mm. a—Pitches p 1 and p 2 of 2 2 c are set.

In the first embodiment, since the rope groove pitch p2 of the first return wheel 22 is set to be larger than the rope groove pitch p0 of the first return wheel 11 in the conventional device, the driving is performed as shown in FIG. When the rope groove pitch of the sheave 21 is p0, the gap δΐ between the ropes is larger than the gap SO between the ropes in the conventional device. In other words, when the gap δ between the ropes in the first embodiment is equal to the gap δθ between the ropes in the conventional device, the rope groove pitch ρ1 of the drive sheave 21 becomes smaller than ρθ. Therefore, the thickness h i of the drive sheave 21 depending on the pitch of the opening groove is smaller than the thickness h 0 of the conventional drive sheave 3.

Therefore, according to the first embodiment, the thickness H of the hoisting machine 1 is (h + h1), which can be reduced by (hO-hl) as compared with the conventional device. In this case, the gap S can be reduced. As a result, the cross section of the hoistway can be reduced, and the construction cost can be reduced.

Here, the gap B in which the first return wheel 22 is arranged is a mounting member (not shown) such as a cab 5, a car guide rail 6, and a rail bracket for attaching the car guide rail 6 to the hoistway wall. Is defined by each dimension. Since the gap B is larger than the thickness h2 of the first return wheel 22, the thickness h2 of the first return wheel 22 can be made closer to the gap B. Therefore, when the thickness h2 of the first return wheel 22 is maximized within a range that does not exceed the gap B (a range that does not hinder the vertical movement of the car 5), the rope groove pitch p2 of the first return wheel 2 2 Can be maximized, and the opening-to-ditch pitch of the drive sheave 21 can be minimized. In this case, the thickness of the hoist 20 is minimized, and the gap S can be minimized.

Example 2.

FIG. 4 is an enlarged view showing a main part of an elevator apparatus according to Embodiment 2 of the present invention. In FIG. 4, the drive sheave 21A of the hoisting machine 2OA is formed to a thickness h3, To the third ropes 14a, 14b, and 14c, respectively, are formed with three pitch grooves 21a to 21c at a pitch p3. The hoisting machine 2 OA is mounted on the lower rear wall of the hoistway 4 with the rotating shaft of the motor unit 2 facing in the front-rear direction. Also, the first return wheel 22 has an acute angle (0 <90 degrees) between the arrangement direction of the rope grooves of the first return wheel 22 and the arrangement direction of the rope grooves of the drive sheave 21, And it is arrange | positioned so that the edge part of the mouth groove 22b may correspond with the edge part of the rope groove 21b in the up-down direction.

Other configurations are the same as those of the first embodiment.

Also in this embodiment 2, when the hoisting rope 14 transfers from the driving sheave 21A to the first return car 22, the first rope 14a exits from the rope groove 21a of the driving sheave 21A. After that, it extends upward at a predetermined inclination with respect to the vertical direction and transfers to the rope groove 2 2 a of the first return wheel 22, and the second rope 14 b is from the rope groove 21 b of the drive sheave 21 A After exiting, extend right above and move onto the mouth groove 2 2 b of the first return car 22, and the third rope 14 c moves up and down after exiting the rope groove 21 c of the drive sheave 21 A To the rope groove 22c of the first return wheel 22. As a result, the rope arrangement direction of the hoisting ropes 14 can be changed by an angle 6>.

In the second embodiment, the first return sheave 22 is arranged such that the angle の between the arrangement direction of the rope grooves of the first return sheave 22 and the arrangement direction of the rope grooves of the drive sheave 21 A is an acute angle. As shown in Fig. 5, when the rope groove pitch of the driving sheave 21A is p1, the gap δ2 between the ropes at the transitional part where the rope arrangement direction changes is set as shown in Fig. 5. It is larger than the gap δθ between the ropes in Example 1. In other words, when the gap δ between the ropes in the second embodiment is made equal to the gap δθ between the ropes in the first embodiment, the rope groove pitch ρ3 of the drive sheave 21 # is smaller than p i. Therefore, the thickness h3 of the drive sheave 21A depending on the rope groove pitch is smaller than the thickness h1 of the drive sheave 21 of the first embodiment.

Therefore, according to the second embodiment, the thickness H of the hoist 2 OA is (h + h 3), and can be reduced by (hi−h 3) as compared with the first embodiment. However, the gap S in the hoistway 4 can be further reduced. As a result, the cross section of the hoistway can be reduced and the construction cost can be further reduced. Here, the gap B in which the first return wheel 22 is arranged is larger than the thickness of the first return wheel 22, so that the gap B does not exceed the gap B (a range that does not hinder the vertical movement of the car 5). Accordingly, the rope groove direction of the first return vehicle 22 can be inclined with respect to the front-rear direction of the hoistway 4. When the direction of the rope groove of the first return sheave 22 is inclined to the maximum with respect to the front-rear direction of the hoistway 4, the rope groove pitch of the driving sheave 21A, that is, the thickness can be minimized. Embodiment 3.

FIG. 6 is a horizontal sectional view showing an elevator apparatus according to Embodiment 3 of the present invention, and FIG. 7 is a longitudinal sectional view showing an elevator apparatus according to Embodiment 3 of the present invention.

In FIG. 6 and FIG. 7, a car turning pulley 23 is mounted at substantially the center of the upper part of the car room 5 so as to be rotatable around an axis whose longitudinal direction is the axial direction. In addition, the first and second return wheels 22 and 12 are mounted on the upper part of the hoistway 4 so as to be rotatable around an axis whose axial direction is the left-right direction. The first and second return wheels 22 and 12 are arranged behind the car turning pulley 23 in the front-rear direction.

The drive sheave 21 and the first return sheave 22 are arranged so that the rope groove directions are orthogonal to each other, and the ends of the opening grooves 21b and 22b coincide in the vertical direction. I have. The rope grooves 21b and 22b are located at the center in the thickness direction of the drive sheave 21 and the first return sheave 22.

One end of the hoisting rope 14 is fixed to the ceiling of the hoistway 4. The hoisting rope 14 is lowered from the ceiling, passed through the car pulley 23, and then raised to the second return wheel 12. Then, the hoisting rope 14 is passed through the second return wheel 12 and the first return wheel 22 and then lowered to the drive sheave 21. Then, the hoisting rope 14 is passed through the drive sheave 21 and then raised to the third return wheel 13. Then, the hoisting rope 14 is passed through the third return wheel 13 to be lowered to the deflecting pulley 10 for the counterweight, passed through the deflecting pulley 10 for the counterweight, and then raised, and the other end thereof is raised. Fixed to the ceiling. Therefore, when the hoisting rope 14 transfers from the drive sheave 21 to the first return car 22, the arrangement direction of the first to third ropes 14 a to 14 c of the hoisting rope 14 changes by 90 degrees. Can be

Other configurations are the same as those of the first embodiment.

In the elevator apparatus configured as described above, the motor section 2 of the hoisting machine 1 is controlled. The drive is controlled by a control device (not shown), and the drive sheave 21 is rotationally driven. There, the hoisting rope 14 is run by the drive sheave 21, and the car room 5 and the counterweight 8 are guided by the car guide rail 6 and the counterweight guide rail 9 to move up and down the hoistway 4. I do.

Also in the third embodiment, since the rope groove pitch p 2 of the first return sheave 22 is larger than the rope groove pitch p 1 of the drive sheave 21, the hoisting rope 14 is moved from the drive sheave 21 to the first 1 Secure the gap 5 between the ropes in the transition section where the rope arrangement direction changes when transferring to the return sheave 2 2 so that the thickness of the drive sheave 2 1 is thinner than the conventional drive sheave 3 be able to.

Further, by setting the gap 5 to l mm, the thickness of the hoisting machine 20 can be minimized.

Example 4.

FIG. 8 is a horizontal sectional view showing an elevator apparatus according to Embodiment 4 of the present invention. In FIG. 8, the hoisting machine 20 is attached to the upper part of the hoistway 4 with the rotating shaft of the motor section 2 facing up and down. In addition, a first return wheel 22 is rotatably mounted on an upper part of the hoistway 4 so as to be rotatable around an axis having a horizontal axis. The first return wheel 22 is disposed between the hoist 20 and the car suspension wheel 7a. The second return wheel 24 is formed to have a thickness h2, and is attached to the upper part of the hoistway 4 so as to rotate about an axis that is horizontal in the axial direction. The second return wheel 24 is disposed between the hoisting machine 20 and the deflecting pulley 10 for the counterweight. In the second return wheel 24, three rope grooves for accommodating the first to third ropes 14a, 14b, and 14c, respectively, are formed by the pitch P2.

The drive sheave 21 and the first return sheave 22 are arranged such that the arrangement directions of the rope grooves are orthogonal to each other. Similarly, the drive sheave 21 and the second return sheave 24 are arranged such that the arrangement directions of the opening grooves are orthogonal to each other.

One end of the hoisting rope 14 is fixed to the ceiling of the hoistway 4. The hoisting rope 14 is lowered from the ceiling, passed through the counterweight pulley 10, and then raised to the second return wheel 24. Then, the hoisting rope 14 is passed through the second return sheave 24, turned, and then extended to the drive sheave 21. About Then, the hoisting rope 14 is passed through the drive sheave 21, changed its direction, and then extended to the first return sheave 22. Then, the hoisting rope 14 is passed through the first return car 22 and then lowered to the car suspension car 7a. Further, the hoisting rope 14 is passed through the car suspension cars 7a and 7b, then raised, and the other end is fixed to the ceiling. Other configurations are the same as those of the first embodiment.

In the elevator device configured in this manner, the hoisting rope 14 moves from the second return sheave 24 to the drive sheave 21 and from the drive sheave 21 to the first return sheave 22. At this time, the arrangement direction of the first to third ports 14 a to 14 c of the hoisting rope 14 is changed by 90 degrees.

And since the opening groove pitch of the first return wheel 22 and the second return wheel 24 is formed at p 2 (> p 0), the drive sheave 21 The rope groove pitch can be pi (<p0). In other words, the gap 3 between the ropes at the transition section where the direction of the rope changes when the hoisting rope 14 transfers from the drive sheave 21 to the first return wagon 22 is d0, and the hoisting rope is secured. The gap between the ropes in the transition section where the rope arrangement direction changes when the 4 transfers from the second return car 24 to the drive sheave 2 1 Therefore, according to the fourth embodiment, the thickness of the hoisting machine 20 can be reduced, and the gap between the car room 5 and the ceiling of the hoistway 4 can be reduced. And construction costs can be reduced.

Also in the fourth embodiment, by setting the gap (5 to l mm), the thickness of the hoisting machine 20 can be minimized.

The arrangement of the first return sheave and the drive sheave is not limited to the arrangement in each of the above embodiments, but may be any arrangement as long as the direction in which the hoisting ropes are arranged in the mouth can be changed.

In addition, the present invention is not limited to the mouth-buffing method in each of the above embodiments, and it goes without saying that the invention may be applied to other mouth-buffing methods. In each of the above embodiments, the hoisting rope 14 is described as being composed of three ropes. However, the number of ropes constituting the hoisting rope is not limited to three. Any number is acceptable, for example, four. As described above, according to the present invention, a car room is provided in a hoistway so as to be able to move up and down, and a plurality of rope grooves are formed which respectively accommodate hoisting ropes for moving the car room up and down. A drive sheave is fixed to a rotating shaft of a motor portion, and a hoisting machine attached to a wall surface of the hoistway so that an axial direction of the rotating shaft is orthogonal to a wall surface of the hoistway; A plurality of rope grooves for accommodating each of the ropes are formed and connected to the drive sheave via the hoisting rope, and a return wheel for changing the arrangement direction of the hoisting rope. Since the rope pitch of the drive sheave is larger than the pitch groove pitch of the drive sheave, the thickness of the drive sheave can be reduced, and the gap between the car room and the wall surface of the hoistway can be reduced. Construction costs reduced Thus, an elevator apparatus which can reduce the amount of light is obtained.

In addition, since the hoist is mounted on the rear wall in the depth direction of the hoistway, the gap between the cab room and the directional wall of the hoistway can be reduced, and the cross-sectional area of the hoistway can be reduced. Reduction becomes possible.

Further, the cab is guided by vertically extending guide rails attached to both side walls in the width direction of the hoistway by mounting members, and is disposed so as to be able to move up and down freely. Is formed to the minimum size determined by the cab, the guide rail, and the mounting member, and the return wheel rotates around a horizontal axis in a gap between the cab and the side wall surface of the hoistway. Since it is arranged freely, the thickness of the return car can be made close to the gap between the above-mentioned cab and one side wall surface of the above-mentioned hoistway within a range not interfering with the elevating operation of the cab, and the cross-sectional area of the hoistway Can be further reduced.

In addition, since the hoist is mounted on the ceiling of the hoistway, the gap between the cab and the ceiling of the hoistway can be reduced, and the height of the hoistway can be reduced, reducing construction costs. it can.

Claims

The scope of the claims

1. The car sheave that can be raised and lowered in the hoistway, and the drive sheave that has a plurality of rope grooves to accommodate the hoisting ropes that lift and lower the car cabin, are mounted on the rotating shaft of the motor and sheave section. A hoisting machine attached to the wall of the hoistway so that the axis direction of the rotating shaft is substantially perpendicular to the wall of the hoistway, and a plurality of ropes respectively accommodating the hoisting ropes A groove is formed, and the elevator is connected to the drive sheave via the hoisting rope, and has a return wheel that changes the arrangement direction of the hoisting rope.

The elevator apparatus according to claim 1, wherein the pitch of the rope groove of the return sheave is larger than the pitch of the groove of the drive sheave.

2. The elevator apparatus according to claim 1, wherein the hoist is mounted on a rear wall surface in a depth direction of the hoistway.

3. The car room is guided by vertically extending guide rails attached to both side walls in the width direction of the hoistway by mounting members so as to be vertically movable, and the car room and both side wall surfaces of the hoistway are provided. Is formed to a minimum size determined by the cab, the guide rails, and the mounting member, and the return wheel is formed around the horizontal axis in a gap between the cab and one side wall surface of the hoistway. 3. The elevator apparatus according to claim 2, wherein the elevator apparatus is rotatably disposed.

4. The elevator device according to claim 1, wherein the hoist is mounted on a ceiling of the hoistway.