KR100871361B1 - Elevator without machine room - Google Patents

Abstract

The present invention is an elevator without machine room which vertically moves behind the counterweight cage and hangs in a jig back manner through the cage and the counterweight first pulley and the second switching pulley. By the elevator without machine room of the present invention, a sufficiently large lifting impact of the counterweight can be ensured and the durability of the hoist rope can be improved. In addition, since the tension difference does not occur in each portion of the hoist rope, it is possible to prevent the lifting vibration in the cage when the cage resumes vertical movement. Towing pulleys are arranged on one of the left and right side walls of the elevator hoistway. A first diverting pulley is disposed far enough below the tow pulley, and a second diverting pulley is disposed on top of the rear wall of the elevator hoistway. The pulley, when viewed vertically from above, is inclined relative to the sidewall such that its axis of rotation extends from the sidewall of the elevator hoistway to its rear wall.

Cage, hoistway, counterweight

Description

Elevator without machine room {MACHINEROOM-LESS ELEVATOR}

The present invention relates to an elevator without machine room without a machine room on top of the elevator hoistway.

Various elevators have been developed and proposed that do not have a machine room on top of the elevator hoistway in order to make efficient use of the space in the building and to observe the law on sunshine.

For example, in the elevator without the conventional machine room shown in FIGS. 5 to 7, the cage 1 is guided by a pair of right and left cage side guide rails 1L and 1R to move vertically in the hoistway 2. do. The counterweight 3 disposed at the rear of the cage 1 is guided by a pair of left and right counterweight guide rails 3L and 3R to vertically move inside the elevator hoistway 2 along its rear wall.

The drive device 4 fixed on the rear wall 2r side above the top of the elevator hoisting drive drives the pulley pulley 5 to rotate about the axis of rotation extending horizontally in the front-rear direction.

The first switching pulley 6 rotatable about the axis of rotation extending in the front-rear direction is disposed at a position just below the left end of the drive device 4 arranged on the rear wall 2r side of the elevator hoistway 2.

The second diversion pulley 7 rotatable about the axis of rotation extending in the lateral direction is arranged to be located above the first diversion pulley 6 of the left wall 2L of the elevator hoistway 2.

The hoist rope 8 wound on the towing pulley 5 has one end 8a extending downward to wind the first switching pulley 6 and an upward direction 8b to wind the second switching pulley 7. ) Extends in the lower direction 8c from the second switching pulley 7, extends horizontally between the pair of left and right cage side pulleys 1a and 1b attached to the bottom of the cage 1, and the front hitch The cage 1 is suspended in a 2: 1 rowing arrangement by extending upward from the cage side pulley 1b on the right side to be secured to a front hitch part 9f.

The other end 8f of the hoist rope 8 extends downward toward the counterweight 3 to wind the counterweight pulley 3a, and the upper side to be fixed to a rear hitch part 9r. Direction, thereby suspending the counterweight 3 in a 2: 1 rowing arrangement.

Disclosure of the Invention

The technical problem to be solved by the invention

By the way, in the elevator without the conventional machine room shown in FIGS. 5-7, the drive device 4 is arrange | positioned at the rear wall 2r of the elevator hoistway 2, and the counterweight 3 is an elevator hoistway 2 Vertical movement along the rear wall 2r).

In the above configuration, since the first switching pulley 6 must be disposed under the drive device 4, a sufficiently large lifting impact of the counterweight 3 is prevented due to the interference between the first switching pulley 6 and the counterweight 3. Could not be secured.

In order to ensure a sufficiently large lifting impact of the counterweight 3, when the first switching pulley 6 is disposed at a higher position, the first switching pulley 6 is the towing pulley 5 and the second switching pulley 7. )

Then, since the extending directions of the portion between the first switching pulley 6 and the second switching pulley 7 of the hoist rope and the portion between the pulling pulley 5 suddenly change, the hoist rope 8 is S-shaped. Bent

Therefore, there exists a possibility that the durability of the hoist rope 8 may fall.

In addition, when the cage 1 stops, a tension difference occurs in each of the hoist rope portions 8a and 8b extending from the first switching pulley 6 in the upward direction, and thus the cage 1 Vertical vibrations may occur in the cage 1 in the case of restarting vertical movement.

The torsion angle of the extending portion 8a between the pulley pulley 5 and the first switching pulley 6 and the extending portion 8b between the first switching pulley 6 and the second switching pulley 7 in the hoist rope is 90 degrees each. Therefore, if the hoist rope 8 is formed of a plurality of ropes of smaller diameter, the angular displacement between the direction of the rope groove of each pulley and the direction in which each rope extends from each rope groove becomes large, so that the angle constituted by the twist line The occurrence of noise and vibration accompanied by contact of the rope with each rope groove can be prevented.

On the other hand, when the drive device 4 and the towing pulley 5 are disposed on the left wall 2L of the elevator hoistway 2 to solve the above problems, the towing pulley 5 on the rear wall 2r side. In order to guide the part of the hoist rope 8 which extends downward from the balance weight 3 to the counterweight 3, the diverting pulleys must be arranged on the left wall 2L of the elevator hoistway.

In the above configuration, the drive device 4, the pulley 5, and the switching pulley are arranged in the front-rear direction when viewed vertically from above, so that the hoist rope extends downward from the pulley pulley 5 to the cage side pulley 1a. The part of (8) is located in front of the elevator hoistway (2).

Accordingly, when viewed vertically from above, it becomes difficult to match the center of gravity G of the cage 1 with the portion 8d of the hoist rope extending horizontally between the pair of left and right cage side pulleys 1a and 1b. .

In addition, since the cage side pulleys 1b and 1c supporting the cage 1 are disposed at the lower part of the cage, the work space where the operator inspects the cage side pulleys 1b and 1c is provided with a pit disposed at the bottom of the elevator hoistway. It should be secured to the depth required for the pit).

In addition, in order for the hoist rope 8 to extend along the left and right sidewalls 1c and 1d of the cage 1, a pair of left and right cage side pulleys 1a and 1b are provided on the left and right sidewalls 1a and 1b of the cage 1. It must protrude from. Therefore, in order to secure the dimension W in the left-right direction (door opening / closing direction of the cage) of the cage 1, the left-right direction dimension L of the cross section of an elevator hoistway must be increased.

 That is, if the horizontal dimension L of the cross section of the elevator hoisting is fixed to a constant dimension, the horizontal dimension W of the cage 1 should be reduced.

Maintenance of the drive device 4, the pulley pulley 5, and the control device CP fixed to the top of the side walls of the elevator hoisting are carried out by raising the cage 1 to the highest position at which the operator can stand. Should be.

On the other hand, maintenance of the cage side pulleys 1a and 1b should be performed in the pit by lowering the cage 1 to the lowest position.

Therefore, in an elevator without a conventional machine room, maintenance work cannot be performed efficiently because an operator must move up and down between the top floor and the bottom floor of a building.

In an elevator without another machine room, the switching pulley 7 shown in FIG. 5 is replaced by a traction pulley, and the driving device is a part of the hoist rope 8d whose axis of rotation extends between the cage side pulleys 1a and 1b. It is arranged to extend in the same direction). As the towing pulley rotates, the counterweight 3 moves vertically at the rear of the cage 1.

However, an elevator without a machine room of such a configuration has problems to be solved such as durability of a hoist rope, a supporting method of a driving device, and vibration.

It is therefore a first object of the present invention to provide an elevator without machine room in which the counterweight moves vertically behind the cage, thereby solving the above conventional problems.

In the elevator, the lifting impact of the counterweight can be sufficiently secured, and the durability of the hoist rope is improved as the drawing of the hoist rope is relaxed. Since no tension difference occurs in each hoist rope, it is possible to prevent the cage's lifting vibration when the cage resumes vertical movement. In addition, it is possible to prevent the occurrence of noise and vibration accompanying the rope groove of each pulley and the hoist rope.

It is a second object of the present invention to provide an elevator without machine room which reduces the pit depth of the bottom of the elevator hoisting and is improved to allow maintenance work to be carried out intensively at the top of the cage. Moreover, it can manufacture so that the left-right dimension of an elevator hoistway cross section may become comparatively small with respect to the width dimension of a cage. Also, part of the hoist rope can be pulled to coincide with the center of gravity G of the cage when viewed vertically from above.

Means to solve the problem

Means according to the first aspect of the present invention for solving the above problems,

A cage guided by a pair of right and left cage side guide rails to vertically move in the elevator hoistway;

A counterweight having a counterweight gauge, guided by a pair of left and right counterweight guide rails and vertically moving at the rear of the cage along the rear wall of the hoistway;

A pulley pulley disposed in the vicinity of one of the left and right sidewalls on the top of the elevator hoisting shaft, and being driven to rotate about a rotation axis extending from the sidewall to the rear wall when viewed vertically from above;

A drive device for rotating the pulley;

A pair of left and right cage side pulleys that suspend and support the cage at an upper portion of the cage and rotate about a rotation axis parallel to the rotation axis of the towing pulley or around a rotation axis extending at an angle adjacent to the rotation axis of the towing pulley;

A first shift pulley disposed lower than the pulley in the vicinity of the side wall and rotated about a rotation axis extending in a left and right direction;

A second diversion pulley disposed higher than the first diversion pulley in the vicinity of the rear wall and rotated about a rotation axis extending in the front-rear direction; And

A hoist rope wound around the towing pulley, one end of which hangs the cage through the pair of left and right cage pulleys, and the other end of which hangs the counterweight through the first and second switching pulleys and the counterweight guess pulley; There is no machine room that includes an elevator.

In an elevator without a machine room according to the first aspect of the present invention, a counterweight moves vertically at the rear of the cage along the rear wall of the elevator hoisting, and the towing pulley and the first switching pulley are near one of the left and right sidewalls of the elevator hoisting. And a second diversion pulley is disposed on top of the elevator hoist near the rear wall.

Thus, even when the first switching pulley is disposed sufficiently below the towing pulley, interference between the first switching pulley and the counterweight can be prevented.

The second diverting pulley may be disposed at the top of the elevator hoistway regardless of the position of the towing pulley. Therefore, interference between the second switching pulley and the counterweight can be prevented, so that a sufficiently large lifting impact can be ensured.

Also, since the first diverting pulley can be disposed sufficiently below the towing pulley, the bent portion of the hoist rope extending from the towing pulley through the first and second diverting pulleys to the counterweight pulley can be smoothed. Thus, the durability of the hoist rope is improved. In addition, since the tension difference does not occur in each part of the hoist rope, it is possible to prevent the lifting vibration of the cage that occurs when the cage resumes vertical movement, and the contact between the rope groove of each pulley and the hoist rope It is possible to reliably prevent the occurrence of noise and vibration accompanying.

Further, when viewed vertically from above, the degree of freedom of arrangement of the cage side pulleys can be increased by appropriately adjusting the angle of the rotational axis of the pulley pulley relative to the side wall of the elevator hoistway. That is, by appropriately adjusting the angle of the axis of rotation of the towing pulley relative to the side wall of the elevator hoistway, when viewed vertically from above, the hoist rope portion and the center of gravity of the cage between the left and right pair of cage side pulleys and the center of gravity of the cage overlap each other. To lose, you can pull the hoist rope.

Since the cage side pulley is arranged at the top of the cage, it is not necessary to arrange a maintenance space at the bottom of the elevator hoistway, thereby reducing the depth of the pit.

In addition to the maintenance of the towing pulley and cage side pulley, the maintenance of a drive unit for rotationally driving the towing pulley and a control unit (CP) arranged on top of the elevator hoisting to control the operation of the drive unit is the top of the cage. This can be done intensively by ethane workers. Therefore, since the worker does not have to climb up and down between the top floor and the bottom floor of the building, maintenance work on an elevator without machine room can be performed efficiently.

Since the hoist rope does not extend along the left and right side walls of the cage, the pair of left and right cage side pulleys do not need to protrude from the left and right side walls of the cage. Thus, even if the horizontal cross section of the elevator hoisting is made to a certain size, a larger space for the cage can be secured. That is, even if the horizontal cross-sectional dimension of the cage is manufactured to a constant size, the horizontal cross-sectional dimension of the elevator hoistway can be made smaller.

Moreover, since the cage side pulley and the hoist rope do not exist in the lower part of the cage, the buffer provided in the bottom part of an elevator hoistway can be arrange | positioned facing the center position of the cage bottom face.

The means according to the second aspect of the present invention is arranged so that the drive device has the same axis as the pulley in the elevator without the machine room according to the first aspect.

The drive device may be a direct driving motor without gears.

That is, when the tow pulley and the drive device are disposed by the same axis as each other, by appropriately adjusting the angle of the axis of rotation of the tow pulley with respect to the side wall of the elevator hoisting when viewed vertically from above, the drive device is independent of the length of the axis of rotation. It can be stored between the side wall and the rear wall of the elevator hoisting.

The means according to the third aspect of the present invention is configured such that in an elevator without a machine room according to the first or second aspect, the hoist rope is formed of a plurality of ropes each having a diameter of 4 mm to 6 mm.

In the machineless elevator according to the third aspect of the present invention, since each of the ropes forming the hoist rope has a diameter of 4 mm to 6 mm, the respective outer diameters of the pulley, cage side pulley, and counterweight pulley are 200 It can be suppressed from mm to 250 mm.

Since the degree of freedom of arrangement of the towing pulley and the pair of cage-side pulleys on the elevator hoistway increases, the hoist rope is hoisted so that part of the hoist rope and the center of gravity of the cage overlap each other when viewed vertically from above. The rope can be pulled freely.

Means according to the fourth aspect of the present invention, in an elevator without a machine room according to any one of the first to third aspects, the rotation axis of the pulley pulley and the rotation axis of the cage side pulley are 0 when viewed vertically from above. It is configured to extend at an angle of 45 to 45 degrees.

The angle formed by the rotational shaft of the pulley and the pair of rotational shafts of the pair of cage-side pulleys is more preferably in the range of 0 to 30 degrees, and most preferably in the range of 0 to 15 degrees.

In an elevator without machine room according to the fourth aspect of the present invention, the torsion angle of the hoist rope portion extending between the towing pulley and the cage side pulley can be reduced.

Therefore, when the cage is raised to the uppermost position and the vertical space between the pulley and the cage side pulley is narrowed, the inclination angle of the hoist rope with respect to the rope groove of the pulley and the cage side pulley can be kept small.

As a result, when the hoist rope is made up of a plurality of ropes, generation of noise and vibration accompanying by contact of each rope made of twisted lines with the rope groove of each pulley can be prevented.

The means according to the fifth aspect of the present invention is configured such that, in an elevator without a machine room according to any one of the first to fourth aspects, a pair of left and right cage side pulleys are arranged near the left and right side walls of the cage, respectively. do.

In an elevator without a machine room according to the fifth aspect of the present invention, either one of the left and right cage side pulleys may be disposed just below or near the pulley pulley.

Since the switching pulley does not need to be interposed between the towing pulley and the cage side pulley, the vertical space, i.e., the top clearance between the cage and the ceiling of the elevator hoistway can be reduced.

By increasing the hoist rope's reel angle to the towing pulley, the hoist rope can be reliably frictionally engaged to the towing pulley.

The means according to the sixth aspect of the present invention is a vertical projection of a cage when a pair of left and right cage side pulleys are viewed vertically in an elevator without a machine room according to any one of the first to fifth aspects. It is configured to be disposed inside the projection.

In an elevator without a machine room according to the sixth aspect of the present invention, when the side wall of the cage approaches the inner wall surface of the elevator hoisting, a larger space for the cage is secured when the horizontal cross-sectional dimension of the elevator hoisting is constant. Can be.

That is, when the horizontal cross-sectional dimension of the cage is set to a constant value, the horizontal cross-sectional dimension of the elevator hoistway can be reduced.

Means according to the seventh aspect of the present invention, in an elevator without a machine room according to any one of the first to sixth aspects, the left and right pair of cage-side pulleys at the center of gravity of the cage when viewed vertically from above Configured to be symmetrical about.

The center of gravity of the cage is the position assumed by design when no passenger is in the cage.

In an elevator without a machine room according to the seventh aspect of the present invention, the pair of left and right cage side pulleys are arranged symmetrically with respect to the center of gravity of the cage when viewed vertically from above, thus suspending the cage upwards with gravity acting on the cage. It is possible to prevent the forces for offsetting greatly from each other in the horizontal direction.

Therefore, the cage can be stably suspended without inclination and can be moved vertically smoothly without vibration.

Means according to the eighth aspect of the present invention, in the elevator without a machine room according to any one of the first to seventh aspect, at least a portion of the cage when the drive device is viewed vertically from above the vertical projection shape of the cage To overlap.

In an elevator without a machine room according to the eighth aspect of the present invention, since at least a part of the drive device is disposed above the cage, the space required for rotationally driving the pulley can be secured.

Since the side walls of the cage in which the drive device is disposed can access the inner wall surface of the elevator hoisting, a larger space for the cage can be secured when the horizontal cross-sectional dimension of the elevator hoisting is constant.

That is, when the horizontal cross-sectional dimension of the cage 10 is set to a constant value, the horizontal cross-sectional dimension of the elevator hoistway can be reduced.

Means according to the ninth aspect of the present invention, in an elevator without a machine room according to any one of the first to eighth aspects, are arranged such that the tow pulley overlaps with the cage when viewed from above vertically. do.

In an elevator without a machine room according to the ninth aspect of the present invention, a space required for the pulley can be secured, and the pulley can be disposed directly above or near one of the cage side pulleys.

Since the switching pulley does not need to be interposed between the towing pulley and the cage side pulley, the vertical space, ie the upper gap, between the ceiling and the cage of the elevator hoistway can be reduced.

Since the winding angle of the hoist rope with respect to the towing pulley can be made to a sufficient size of 180 degrees, the hoist rope can be reliably frictionally engaged to the towing pulley.

Means for solving the above problems, according to a tenth aspect of the present invention,

A cage guided by a pair of right and left cage side guide rails to vertically move in the elevator hoistway;

A counterweight having a counterweight pulley and guided by a pair of left and right counterweight guide rails to vertically move from the rear of the cage along the rear wall of the elevator hoist;

When viewed vertically from above, a pulley pulley driven to rotate about a rotation axis extending from the rear side of one of the left and right sidewalls of the elevator hoisting to the front side of the other of the left and right sidewalls of the hoistway;

A drive device for rotating the pulley;

A pair of left and right cage side pulleys, which are supported by a hoist rope extending in a direction transverse to a rotation axis of the towing pulley, for hanging the cage from the top of the cage;

A first diverting pulley that rotates on a lower side than the towing pulley; And

And a second switching pulley rotating at a higher side than the first switching pulley.

The hoist rope is wound on the towing pulley, one end of which hangs the cage through the pair of left and right cage pulleys, and the other end of the hoist rope pulls the balance weight through the first and second switching pulleys and the counterweight guessing pulley. An elevator without machine room, characterized by hanging.

In addition, the means according to an eleventh aspect of the present invention for solving the above problems,

A cage which is guided to the rail and vertically moves inside the elevator hoistway;

A pair of cage side pulleys disposed on the cage;

A counterweight moving vertically behind the cage in the elevator hoist;

A drive device having a rotating shaft extending across a straight line between the pair of cage side pulleys;

A pulley pulley which is rotationally driven by the drive device;

A hoist rope suspended in the elevator hoistway, one end of which is extended from the towing pulley and wound on the cage side pulley, and the other end of which is wound on the counterweight; And

It is an elevator without a machine room, including; the switching pulley disposed in the lower portion of the drive device between the pulley and the balance weight.

In an elevator without machine room according to the tenth and eleventh aspects of the invention, the degree of freedom of the arrangement of the drive arrangement can be increased. In addition, the twist angle of the hoist rope is reduced, and the durability thereof is improved. In addition, the occurrence of noise and vibration accompanying the hoist rope and the rope groove of each pulley is prevented.

Effects of the Invention

The elevator without a machine room of the present invention can secure a sufficiently large lifting impact against the counterweight, and the durability of the hoist rope is improved by easing the drawing of the hoist rope. In addition, since the tension difference does not occur in each part of the hoist rope, the lifting vibration of the cage, which occurred when the cage restarts the vertical movement, can be prevented. In addition, it is possible to prevent the occurrence of noise and vibration accompanying the contact between the rope groove of each pulley and the hoist rope.

1 is a perspective view of an elevator without a machine room according to one embodiment of the invention.

2 is an enlarged perspective view of the main part of FIG. 1;

3 is a plan view of the elevator without the machine room shown in FIG.

4 is a front view schematically showing the arrangement of the pulley and cage side pulleys;

Figure 5 is a perspective view schematically showing an elevator without a conventional machine room.

FIG. 6 is a plan view of the elevator without a machine room shown in FIG. 5; FIG.

7 is a front view of the elevator without a machine room shown in FIG.

Explanation of the sign

1: cage

2: hoistway

3: counterweight

4: driving device

5: towing pulley

6,7: pulley

8: hoist rope

9f, 9r: hitch part

10: cage

11L, 11R: Cage Side Rails

12L, 12R: Door

13: upper beam

14L, 14R: Vertical Beam

15: pulley support beam

16L, 16R: Pulley on the cage side

17: towing pulley

18: drive unit

19: Counterweight

19a, 19b: Balance estimation pulley

20L, 20R: Counterweight Guide Rail

21: support table

31,32: first transition pulley

33: 2nd transition pulley

Hereinafter, an elevator without a machine room according to the present invention will be described with reference to FIGS. 1 to 4.

In the following description, the direction in which the door of the cage is opened and closed is referred to as the left and right direction, the direction in which the passenger exits from the cage is referred to as the front, the direction in which the passenger enters the cage is referred to as the rear, and the vertical direction is in the vertical direction. Respectively.

The same reference numerals are used for the same parts, and their description is omitted.

In the elevator without machine room according to the embodiment of the present invention shown in Figs. 1 to 4, the cage 10 is guided by a pair of right and left cage side rails 11L and 11R, and the elevator hoistway 2 installed in the building. It moves vertically inside of.

The pair of left and right doors 12L and 12R disposed on the front surface of the cage 10 are opened and closed in the left and right directions.

The cage frame supporting the cage 10 includes an upper beam 13 extending horizontally from the top of the cage 10 in the horizontal direction, and a pair of left and right vertical beams 14L connected to the left and right ends of the upper beam 13, respectively. 14R).

In a vertical gap between the cage 10 and the upper beam 13, the pulley support beam 15 is arranged to be spaced upwardly from the top surface of the cage 10. As shown in FIG. 3, the pulley support beam 15 is inclined in the front-rear direction and the left-right direction in a horizontal plane with respect to the upper beam 13, so that the pulley support beam 15 and the top beam 13 when viewed vertically from above. ) Forms an X-shaped shape.

The pulley support beam 15 is connected to the upper beam 13 such that the longitudinal center portion of the upper surface thereof is in close contact with the longitudinal center portion of the lower surface of the upper beam 13. Therefore, the force acting on the pair of left and right cage side pulleys 16L and 16R to suspend the cage 10 upwards is from the pulley support beam 15 and the upper beam 13 and the pair of left and right vertical beams 14L, Can be delivered to cage 10 via 14R).

Brackets 15a for rotatably supporting the pair of left and right cage side pulleys 16L and 16R are disposed at both upper ends of the pulley support beam 15, respectively.

Since the pulley support beam 15 may be disposed lower than the rotation axis of the pair of left and right cage side pulleys 16L and 16R, the upper beam 13 of the cage frame may be disposed adjacent to the upper surface of the cage 10. .

Thus, when the cage 10 is raised to the best position, the vertical space, ie top clearance, between the ceiling of the elevator hoist and the top of the cage 10 can be reduced.

As shown in Fig. 3, on the top of the elevator hoisting path 2, the pulley pulley 17 is located near the left wall 2L of the elevator hoisting path 2, in the front-rear direction of the left wall 2L at a substantially central position. It is arranged. The axis of rotation of the pulley 17 is inclined to the left wall 2L when viewed vertically from above, and extends horizontally to the rear wall 2r.

At the rear of the pulley 17, a drive device 18 for rotationally driving the pulley 17 is arranged on the same axis as the pulley 17.

A pair of right and left counterweight guide rails 20L, 20R for guiding the counterweight 19 moving vertically along the rear wall 2r of the elevator hoistway 2 is disposed below the rear end of the drive device 18. .

The drive device 18 is supported by the guide rails 20L and 20R on both the right and left sides and the cage-side guide rail 11L on the left side, and is mounted and fixed on the horizontally extending support table 21.

As shown in Figs. 1 and 2, the first switching pulleys 31, 32 rotatable about a horizontal axis extending horizontally in the left and right directions are provided on the left side wall of the elevator hoistway 2 below the pulley pulley 17. 2L) is arranged in the rear part of the center part in the front-back direction of the left wall 2L near.

The first switching pulleys 31 and 32 are supported by a supporting member (not shown) extending horizontally between the cage-side guide rail 11L on the left side and the balance-guided guide rail 20L on the left side.

A second diversion pulley 33 which can rotate around a rotation axis extending horizontally in the front-rear direction is the rear wall 2r, near the rear wall 2r of the elevator hoisting 2, just below the support table 21. It is arranged in the left end side of the).

The second switching pulley 33 is supported by a supporting member (not shown) connected horizontally between the left and right pairs of balance guessing guide rails 20L and 20R.

The hoisting rope 17 is wound with a hoist rope 8 consisting of eight mutually parallel ropes each having an outer diameter of, for example, 5 mm.

One end of the hoist rope 8 is a portion 8a extending downward from the pulley pulley 17 through the through hole penetrating the support table 21 toward the cage side pulley 16L on the left side, and the cage 10. A portion 8b extending horizontally between the pair of left and right cage side pulleys 16L and 16R that supports and suspends, and a portion extending upward from the right side cage side pulley 16R to be fixed to the front hitch portion 9f ( 8c) to suspend the cage 10 in a 2: 1 rowing arrangement.

The other end of the hoist rope 8 includes a portion 8d extending downward toward the front first switching pulley 31 disposed below the traction pulley 17 and a pair of front and rear first switching pulleys 31 and 32. ) 8a of horizontally extending between the part, the part 8f extended upward from the rear 1st switching pulley 32, and the 2nd switching pulley 33, and the counterbalance guess pulley 19a of the left side. Right side counterbalance pulley 19b to be fixed to portion 8g extending downwards toward the side, horizontally extended portion 8h between left and right pairs of counterweight pulleys 19a and 19b, and rear hitch portion 9r. ) Consists of a portion 8i extending upwards, suspending the counterweight 19 in a 2: 1 rowing arrangement.

As shown in FIG. 3, the pair of left and right cage side pulleys 16L and 16R are symmetrically disposed with respect to the center of gravity G of the cage 10 when viewed vertically from above.

That is, the right and left pairs of cage side pulleys 16L and 16R have a portion 8b extending horizontally between the left and right pairs of cage side pulleys 16L and 16R as viewed vertically from above. Is arranged to pass through the top of the center of gravity (G).

In addition, the pair of left and right cage side guide rails 11L and 11R are symmetrically disposed in the left and right direction with respect to the center of gravity G of the cage 10.

Therefore, the gravity acting on the cage and the force that suspends the cage upwards are not greatly offset in the horizontal direction, so that the cage can be stably suspended without tilting and can be moved vertically smoothly without vibration.

Since the hoist rope 8 is formed by an arrangement of eight ropes having an outer diameter of less than 5 mm, each outer diameter of the pair of left and right cage side pulleys 16L and 16R can be suppressed in the range of 200 mm to 250 mm.

With this configuration, interference between the pair of left and right cage side pulleys 16L and 16R and the upper beam 13 can be prevented. In addition, as shown in FIG. 3, the angle between the upper beam 13 and the pulley support beam 15 can be made smaller when viewed vertically from above.

Therefore, when viewed vertically from above, the degree of freedom in arrangement of the pair of left and right cage side pulleys 16L and 16R can be increased.

That is, as shown in FIG. 3, when viewed vertically from above, the left and right pairs of right and left pairs are appropriately adjusted by appropriately adjusting the angle α of the rotational axis of the towing pulley 17 with respect to the left wall 2L of the elevator hoistway 2. The degree of freedom of arrangement of the cage side pulleys 16L and 16R can be increased.

In addition, compared to a conventional elevator in which the rotating shaft of the tow pulley and the cage side pulley are parallel to each other using a flat flexible rope or belt, an elevator without a machine room according to an embodiment of the present invention is a pair of left and right pairs. Cage side pulleys (16L, 16R) and a pair of left and right cage side guide rails (11L, 11R) are symmetrically disposed with respect to the center of gravity of the cage, and the drive unit, the pulley, the cage side pulleys, and the guide rail It is arranged more freely inside the hoistway 2.

That is, since the traction pulley 17 and the pair of right and left cage side pulleys 16L and 16R are arranged as described above, the system can be freely configured according to the cross-sectional shape of the elevator hoistway 2 and the cage 10.

The left and right pairs of cage-side pulleys 16L and 16R, when viewed vertically from above, have an angle θ of the rotational axes of the pair of left and right cage-side pulleys 16L and 16R with respect to the rotational axis of the tow pulley 17 from 0 degrees. It is the range of 45 degrees, More preferably, it is the range of 0-30 degree, Most preferably, it arrange | positions so that it may become the range of 0 degree-15 degree.

Therefore, the torsion angle of the hoist rope portion 8a extending between the pulley pulley 17 and the cage side pulley 16L on the left side can be minimized.

Thus, when the cage 10 is raised to the top position and the vertical space between the pulley pulley 17 and the left cage side pulley 16L is narrowed, the outer peripheral surface of the pulley pulley 17 and the left cage side pulley 16 The angular displacement of the rope grooves provided in the extending direction and the direction in which each rope extends can be kept small.

In more detail, the rope extending downward from the rope groove of the pulley pulley 17 toward the cage-side pulley 16L on the left side does not always extend vertically downward, and the position of the left cage-side pulley 16L. As a result, it is slightly inclined in the front-rear direction and the left-right direction and extends downward. Thus, friction occurs between the wall surface of the rope groove of the pulley pulley 17 and each rope. However, in an elevator without machine room according to an embodiment of the present invention, the angular displacement between the direction of the rope groove and the direction in which each rope extends from the rope groove can be kept small.

Therefore, the occurrence of noise and vibration accompanying by the contact between each rope composed of twisted lines and the rope groove of each pulley can be prevented, and also the durability of the hoist rope 8 can be improved.

In an elevator without machine room according to an embodiment of the invention, the counterweight 19 is moved vertically at the rear of the cage 10 along the rear wall 2r of the elevator hoistway 2. The towing pulley 17 and the first diverting pulleys 31 and 32 are arranged near the left wall 2L of the elevator hoisting path 2, and the second diverting pulley 33 is also arranged on the rear wall of the elevator hoisting path 2 2r) in the vicinity.

Therefore, even if the first switching pulleys 31 and 32 are sufficiently located below the traction pulley 17, the first switching pulleys 31 and 32 can be prevented from interfering with the counterweight 19. In addition, the second switching pulley 33 may be disposed on the top of the elevator hoistway 2 regardless of the pulley pulley 17.

As a result, interference between the second switching pulley and the counterweight can be prevented, so that a sufficiently large lifting impact of the counterweight can be ensured.

Since the first diverting pulleys 31, 32 can be disposed sufficiently below the towing pulley 17, balance from the towing pulley 17 through the first diverting pulley 31, 32 and the second diverting pulley 33. The drawing of each part 8d, 8e, 8f, 8g of the hoist rope extending to the guess pulleys 19a, 19b can be relaxed.

Therefore, the durability of the hoist rope 8 can be improved, and since tension differences do not occur in each part of the hoist rope 8, the lifting vibration generated when the cage starts vertical movement and the rope grooves and hoists of each pulley The occurrence of noise and vibration accompanied by the contact of the rope can be prevented.

As shown in FIG. 4, the pair of left and right cage side pulleys 16L and 16R are disposed in the vicinity of the left and right sidewalls 10L and 10R at the upper portion of the cage 10, respectively.

Therefore, a work space for maintaining the left and right pairs of cage side pulleys 16L and 16R need not be arranged at the bottom of the elevator hoisting, whereby the depth of the pit at the bottom of the elevator hoisting can be reduced. .

In addition, since the cage side pulley and the hoist rope do not exist in the lower part of the cage 10, a buffer provided at the bottom of the elevator hoistway can be disposed to face the center position of the bottom face of the cage 10.

Control device CP disposed at the top of the elevator hoistway to control the operation of the pair of left and right cage side pulleys 16L and 16R, the traction pulley 17, the drive device 18 and the drive device 18 thereof. Maintenance of the can be performed intensively at the top of the cage (10). In this case, maintenance work on an elevator without a machine room can be efficiently performed since the operator does not have to climb up and down between the top floor and the bottom floor of the building.

Since the hoist rope 8 does not extend along the left and right sidewalls 10L and 10R of the cage 10, the left and right sidewalls 10L of the cage 10 have the left sidewall 10L of the cage 10 of the tow pulley 17. It can extend up to the dimension W2 located below.

Therefore, a larger space for the cage 10 can be secured when the horizontal cross section of the elevator hoistway is constant.

That is, when the horizontal cross-sectional dimension of the cage 10 is constant, the horizontal cross-sectional dimension of the elevator hoistway can be made smaller.

Since the cage side pulley 16L on the left side is located immediately below the towing pulley 17, the winding angle of the hoist rope 8 with respect to the towing pulley 17 can be approximately 180 degrees, and the hoist rope 8 Can be reliably frictionally engaged with respect to the pulley 17.

As described above in detail with respect to the elevator without a machine room according to an embodiment of the present invention, the present invention is not limited to the above embodiment, various modifications and changes can be made.

For example, in the above embodiment, the first switching pulley is constituted by a pair of front and rear pulleys 31 and 32 disposed in the vicinity of the left wall 2L of the elevator hoisting 2, but the pulley pulley 17 is the elevator hoisting. When arranged closer to the rear wall 2r of (2), the said 1st switching pulley can be comprised only by the pulley 31 of the front.

Similarly, in this embodiment, the second switching pulley consists of a single pulley 33 arranged near the rear wall 2r of the elevator hoisting 2, but the counterweight 19 is on the left side of the elevator hoisting 2 When it is arrange | positioned far from the wall 2L, the said 2nd switching pulley can be comprised by a pair of left and right pulleys.

Claims (13)

A cage guided by a pair of left and right cage side guide rails to vertically move in the elevator hoistway; A counterweight having a counterweight pulley and guided by a pair of left and right counterweight guide rails to vertically move from the rear of the cage along the rear wall of the elevator hoist; A pulley pulley disposed in the vicinity of one of the left and right sidewalls on the top of the elevator hoisting path, and being driven to rotate about an axis of rotation extending at an acute angle with respect to any one of the left and right sidewalls when viewed vertically from above; A drive device for rotating the pulley; A pair of left and right cage side pulleys suspended from and supported by the cage at an upper portion of the cage, and when viewed vertically from above, one of the pair of left and right cage side pulleys is disposed near the front side of the towing pulley, and the pair of left and right cages The other side of the side pulley comprises: a pair of left and right cage side pulleys disposed on the one front side of the pair of left and right cage side pulleys; A pair of front and rear first switching pulleys disposed lower than the towing pulley in one of the left and right side walls and being rotated about a rotation axis extending in the left and right directions, wherein the front and rear pair of first switching pulleys when viewed vertically from above A front and rear pair of first switching pulleys arranged at one side of the rear side of the tow pulley and the other of the front and rear pair of first switching pulleys arranged at one rear side of the front and rear pair of first switching pulleys; A second shift pulley disposed higher than the front and rear pair of first shift pulleys near the rear wall, the second shift pulley being rotated about an axis of rotation extending in the front-rear direction; And It is wound on the towing pulley, one end of which hangs the cage through the pair of left and right cage side pulleys, and the other end of the balance weight through the front and rear pair of first and second switching pulleys and the counterweight guessing pulley. Includes a hoist rope for hanging, As viewed vertically from above, a first angle between the axis of rotation of the pulley and the left and right sidewalls is greater than a second angle between the pair of left and right cage side pulleys and the left and right sidewalls, The tow pulley and the pair of left and right cage side pulleys are arranged such that when viewed vertically from above, a third angle between the axis of rotation of the tow pulley and the axis of rotation of the pair of left and right cage side pulleys is 0 degrees to 45 degrees. Elevator without machine room. The method of claim 1, And the drive unit is arranged to have the same axis as the towing pulley. The method according to claim 1 or 2, Said hoist rope is formed of a plurality of ropes each having a diameter of 4 mm to 6 mm. The method according to claim 1 or 2, And said rotary shaft of said pulley and said cage-side pulley extend at an angle of 0 degrees to 30 degrees when viewed vertically from above. The method according to claim 1 or 2, And the pair of left and right cage side pulleys are respectively disposed in the vicinity of the left and right side walls of the cage. The method according to claim 1 or 2, And the pair of left and right cage side pulleys are disposed inside a vertical projection of the cage when viewed vertically from above. The method according to claim 1 or 2, And the pair of left and right cage side pulleys are arranged symmetrically with respect to the center of gravity of the cage when viewed vertically from above. The method according to claim 1 or 2, And said drive device is arranged such that at least a portion thereof overlaps said cage when viewed vertically from above. The method according to claim 1 or 2, And the towing pulley is arranged such that at least a portion thereof overlaps with the cage when viewed vertically from above. delete delete The method according to claim 1 or 2, A cage frame for supporting the cage, the cage frame having an upper beam extending horizontally horizontally above the upper surface of the cage; And A cage side pulley support beam inserted horizontally in a vertical space between the upper beam and the upper surface of the cage, the center portion of which is connected to the center portion of the upper beam, and supporting the pair of left and right cage side pulleys at both ends; Including more, And one side of the pair of left and right cage side pulleys is disposed at the rear side of the upper beam, and the other side of the pair of left and right cage side pulleys is disposed at the front side of the upper beam. The method of claim 12, The cage side pulley support beam is disposed below the rotation axis of the cage side pulley, Viewed vertically from above, the one side of the pair of left and right cage side pulleys faces the rear sidewall of the upper beam, and the other side of the pair of left and right cage side pulleys faces the front sidewall of the top beam. Elevator without machine room.

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