KR20010041323A - Elevator system having drive motor located between elevator car and hoistway sidewall - Google Patents

Abstract

The elevator system includes a hoistway formed by the surrounding construct. An elevator car and a counterweight are located in the hoistway, and a drive motor is located between the hoistway sidewall and the elevator car. The drive motor operably engages and suspends the elevator car and counterweight via at least one flat rope or belt.

Description

ELEVATOR SYSTEM HAVING DRIVE MOTOR LOCATED BETWEEN ELEVATOR CAR AND HOISTWAY SIDEWALL}

There is a considerable cost to build a machine room in an elevator. These costs include the cost of constructing the machinery room and the structures needed to support the weight of the machine room and elevator equipment, and the cost of blocking adjacent assets from sunlight (for example, the sunshine law in Japan and other countries). It includes.

It is an object of the present invention to provide an elevator system without a machine room that avoids the above-mentioned drawbacks associated with conventional elevator systems.

Another object of the present invention is to use a flat rope technique to reduce the size of the drive motor and pulley so that a conventional drive motor or flat drive motor can be replaced in the space between the side wall of the hoistway and the elevator car.

The present invention relates to an elevator system, and more particularly to an elevator system comprising a drive motor provided between the elevator car and the side wall of the hoistway.

1 is a plan view of an elevator system according to the present invention.

FIG. 2 is a side cross-sectional view of the elevator system of FIG. 1 showing the bottom suspension rope form. FIG.

3 is a side sectional view of a second embodiment of the present invention showing an elevator system employing a 1: 1 rope configuration;

4 is a side cross-sectional view of another embodiment of the present invention.

5 is a plan view of an elevator system according to another embodiment of the present invention showing a drive motor at a hoist pit.

6 is a partial side cross-sectional view of the elevator system of FIG.

7 is a side cross-sectional view of a plurality of flat ropes and a pulley having multiple cords.

8 is a sectional view of the flat rope;

The elevator system includes a hoistway defined by the surrounding construct. The elevator car and counterweight are located in the hoistway, and the drive motor is located between the elevator car and the hoistway sidewalls. The drive motor operably connects and suspends the elevator car and counterweight via at least one flat rope or belt.

An advantage of the present invention is that the elevator system significantly reduces the space and construction costs associated with elevator systems with machine rooms.

Another advantage of the present invention is that several optional drive motor positions are provided.

Another advantage of the present invention is that the flat rope technique reduces the size of the drive motor and the pulley, thereby reducing the space between the side walls of the hoistway and the elevator car required to accommodate the motor and the pulley.

1 and 2 an elevator system 10 according to the invention is shown. The elevator system includes a hoistway 12 formed by the surrounding construct 14. The elevator car 16 is arranged in the hoistway 12 and moved along the hoistway. The first and second elevator pulleys 20, 22 are connected to the lower side of the elevator car 16 on opposite sides. The elevator system 10 has a first and second support column 24, 26 disposed generally on one side 28 of the elevator car 16 on opposite sides 30, 32 of the hoistway 12 with respect to each other. It includes. The first and second support columns 24, 26 extend vertically from the bottom or floor 34 of the hoistway 12 to the top of the hoistway. The support member 36 (shown in dashed lines in FIG. 1) extends horizontally between the first and second support columns 24, 26 at the top of the hoistway 12.

A drive motor 42 comprising a drive pulley 44 operably connected to the drive motor is supported on the support member 36 and supports the hoistway 12 between the side walls 46 of the hoistway and the elevator car 16. Along the vertically extending space.

The elevator system 10 further includes a counterweight 48 having counterweight pulleys 50 connected to the top of the counterweight. The counterweight 48 is disposed below and aligned with the drive motor 42 in a space extending vertically along the hoistway 12 between the elevator car 16 and the side wall 46. The counterweight 48 is connected to the elevator car 16 via a flat rope or belt to balance the elevator car during vertical movement along the hoistway 12.

The use of flat ropes or belts makes it possible to use smaller drive motors and pulleys for driving and suspending elevator cars as well as smaller counterweight loads as compared to drive motors and pulleys using conventional round ropes. The diameter of a drive pulley conventionally used in elevators with round ropes is limited to 40 times or greater than the rope diameter due to the fatigue of the rope due to repeated compliance with the pulley diameter. Flat ropes or belts have an aspect ratio greater than 1, which means the ratio of the belt width w to the thickness t (feature ratio = w / t). Thus, flat ropes or belts are essentially thinner than conventional round ropes. This thinning results in less bending stress in the fiber when the belt is wound around a given diameter pulley. This allows the use of smaller diameter pulleys. Torque is proportional to the diameter of the pulley. Therefore, the use of a small pulley pulley reduces motor torque. Motor size (rotor volume) is proportional to torque, so even if the mechanical output remains the same regardless of the pulley size, flat ropes or belts allow the use of small drive motors that operate at higher speeds than systems using conventional round ropes. do. Thus, a small flat drive motor can be accommodated in the hoistway between the elevator sidewall and the sidewall of the hoistway, which significantly reduces the construction cost of the overhead space.

In summary, the reduction in device size offers several advantages. First, the compact device reduces overhead space requirements when the device is located above elevator cars and hoists. This allows the building to have a flat roof, which not only reduces the cost of building, but also complies with the law on sunshine. Second, small devices use less material and require less production cost than larger devices. Third, the light weight of the compact device reduces the time for handling the device and the need for a facility to elevate the device to significantly reduce installation costs. Fourthly, low torque and high speeds eliminate costly gears. In addition, the gears cause vibration and noise and require lubrication. However, geared devices can also be used if necessary.

In addition, flat ropes or belts also distribute elevator and counterweight loads over a larger surface area on the pulley for reduced special pressure on the rope, thus increasing its operating life. The flat ropes or belts are also made of high-quality materials such as urethane or rubber jackets reinforced with fibers or steel.

The flat rope 52 has first and second ends 54, 56 connected within the top of the hoistway 12. The first end 54 of the flat rope is connected to the support member 36, and the second end 56 is connected to the ceiling 58 of the hoistway 12. As shown in FIG. 2, the flat rope 52 extends downwardly from the first end 54 at the support member 36, loops 180 ° around the counterweight pulley 50, and extends upward to drive the pulley 44. Loop 180 ° around, and extend downward to abut the elevator car 16 through the first and second elevator pulleys 20, 22, and generally extend upwards at the ceiling 58 of the hoistway 12. It ends at the second end 56.

The first and second guide members 60, 62 for guiding the elevator car 16 and the counterweight 48 are arranged along the length of the first and second support columns 24, 26. The guide members 60, 62 are formed integrally with the support columns 24, 26, or are disposed separately around the support column. As shown in FIG. 1, the first and second guide members 60, 62 form first and second elevator guide surfaces 64, 66. The first and second guide surfaces 64, 66 extend perpendicularly along the first and second support columns 24, 26 with respect to the length of the support column corresponding to the elevator car travel path. The opposing surfaces 68, 70 of the elevator car 16 are movable with the first and second elevator guide surfaces 64, 66 as the elevator car moves vertically along the first and second support columns 24, 26. Take the form of The first and second guide members 60, 62 form first and second counterweight guide surfaces 72, 74. The first and second counterweight guide surfaces 72, 74 extend perpendicularly along the first and second support columns 24, 26 with respect to the length of the support column corresponding to the counterweight travel path. Opposing surfaces 76 and 78 of counterweight 48 are movably engageable with respective first and second counterweight guide surfaces 72 and 74 as the counterweight moves vertically along the support column. Take In FIG. 2 the elevator car 16 is shown spaced apart from the first and second support columns 24, 26 for a clear illustration of the rope shape.

In operation, the drive motor 42 is signaled by a controller (not shown) that rotates the drive pulley 44 counterclockwise to move the elevator car 16 upward along the hoistway 12. The pulley 44 that rotates counterclockwise pulls a portion of the flat rope 52 upward between the drive pulley 44 and the elevator pulleys 20, 22, so that the elevator pulley pulls the second end 56. The elevator 16 is moved upwardly along the hoistway 12 by causing it to roll along the flat rope. As the drive pulley 44 rotates counterclockwise, a portion of the flat rope 52 that loops over the drive pulley 44 and extends downward toward the counterweight pulley 50 increases in length so that the counterweight The pulley is rotated counterclockwise, so that the counterweight 48 descends along the hoistway 12.

The drive motor 42 is signaled by a controller (not shown) that rotates the drive pulley 44 clockwise to move the elevator car 16 downward along the hoistway 12. The pulley 44 that rotates in the clockwise direction pulls a portion of the flat rope 52 to loop around the drive pulley 50 and extends downward toward the counterweight pulley 50 to rotate the counterweight pulley clockwise. As a result, the counterweight 48 is moved upward along the hoistway 12. The drive pulley 44, which rotates clockwise, extends a portion of the flat rope 52 between the second end 56 of the flat rope 52 and the drive pulley so that the elevator pulleys 20, 22 move away from the second end. The elevator car 16 moves downward along the hoistway 12 by causing it to roll along the flat rope.

As shown in Figs. 1 and 2, the provision of a drive motor in the space along the hoistway between the sidewalls of the hoistway and the elevator car does not allow the device or the like to occupy the hoist pit or the overhead protrusions of the elevator car, thus creating an internal building. Minimize height requirements. Providing the device on the side of the elevator car reduces the overhead dimensions of the hoistway, thus requiring only the space needed for rope extension, buffer stroke and allowance of counterweights.

3 shows an elevator system 100 according to a second embodiment of the invention. 1 and 2, the same reference numerals are given to the same components. The elevator system 100 is similar to the elevator system 10 in that it adopts a 1: 1 rope form that does not use counterweight pulleys or elevator pulleys. The embodiment of FIG. 3 will be described for different features from the previous embodiment.

The first end 102 of the flat rope 52 is connected to the top of the counterweight 48, and the second end 104 of the flat rope is connected to the bottom of the elevator car 16. The flat rope extends upwardly from its first end 102 at the top of the counterweight 48 and loops 180 ° around the drive pulley 44 and extends downward to connect at the bottom of the elevator car 16. . For convenience when shown in the figure, the elevator car 16 is shown spaced apart from the first and second support columns 24, 26.

In operation, the drive motor 42 is signaled by a controller (not shown) that rotates the drive pulley 44 counterclockwise to move the elevator car 16 upward along the hoistway 12. The pulley 44 that rotates counterclockwise pulls a portion of the flat rope 52 upward between the drive pulley 44 and the elevator car 16 so that the elevator car passes through the guide members 60 and 62. Move upward along (12). As the drive pulley 44 rotates counterclockwise, a portion of the flat rope 52 that extends between the drive pulley 44 and the counterweight pulley 48 increases in length so that the counterweight 48 moves in the hoistway. Descend along (12).

The drive motor 42 is connected to a controller (not shown) which rotates the drive pulley 44 clockwise to move the elevator car 16 downward along the hoistway 12 through the guide members 60 and 62. Signaled by The drive pulley 44, which rotates clockwise, pulls up a portion of the flat rope 52 extending between the drive pulley and the counterweight 48 so that the counterweight moves upward along the hoistway 12. The drive pulley 44, which rotates clockwise, also extends the length of a portion of the flat rope 52 between the drive pulley and the elevator car 16, causing the elevator car to move downward along the hoistway 12.

4 shows an elevator system 200 according to a third embodiment of the present invention. The same components as in the previous embodiment are given the same reference numerals. The embodiment of FIG. 4 will be described in terms of differences from the previous embodiment.

The drive motor 202 and drive pulley 204 are connected in part of the hoistway 12, such as the ceiling 208 of the hoistway or sidewall 206 (FIG. 4). The drive motor 202 is, for example, geared or belt-reduced to reduce the required motor torque and is aligned in the vertical extension space of the hoistway between the sidewall 206 of the hoistway and the elevator car 16 arranged in the hoistway. do. The elevator car comprises first and second elevator pulleys 20, 22 connected to the lower side of the elevator car on opposite sides of the car with respect to each other. Counterweight 48 and counterweight pulley 50 connected thereon are disposed below drive motor 202 and are driven in a space along hoistway 12 between elevator car 16 and sidewall 206. Is aligned with. The flat rope or belt 210 includes first and second ends 212, 214 connected to the top of the hoistway 12. As shown in FIG. 4, the first and second ends 212, 214 are connected to the ceiling 208 of the hoistway 12 on opposite sides with respect to each other. The flat rope 210 extends downwardly from the first end 212 and loops 180 ° around the counterweight pulley 50, and extends 180 ° around the drive pulley 204, generally downward. The lower suspension suspends the elevator car 16 through the elevator pulleys 20 and 22, and is extended upward to terminate at the second end 214 at the ceiling 208 of the hoistway 12. Operation of the elevator system 200 is similar to that of the elevator system 10 of FIGS. 1 and 2 with respect to the use of the rope form for moving the elevator car 16 and the counterweight 48, which will be described in detail. I never do that.

5 and 6 show an elevator system 300 according to another embodiment of the present invention. The same components as in the previous embodiment are given the same reference numerals.

The elevator system 300 includes a first support member 302 connected to and extending between the opposing sides 304, 306 of the hoistway 12 at the top of the hoistway, the elevator car 16 and the hoistway sidewalls ( 308 is located above the space extending vertically along the hoistway. The second support member also extends horizontally therebetween and is connected to the opposing sides 304 and 306 of the hoistway 12 at the top of the hoistway to the same level as the first support member 302. The second support member 310 is aligned in a space extending vertically along the hoistway 12 between the elevator car 16 and the side wall 308, and is interposed between the first support member 302 and the elevator car. . The first and second deflection pulleys 312, 314 are connected to the first and second support members 302, 310.

Counterweight 316 with counterweight pulley 318 connected to the top is provided in a vertical extension space along the hoistway for easy and safe access for maintenance personnel between elevator car 16 and sidewall 308. Disposed under the first and second support members 302, 310. Elevator car 16 and counterweight 316 are direct drive brushless motors and associated drive pulleys 322 located below the hoistway in the vertical extension space between elevator car 16 and sidewall 308. By this, it is partially moved along the hoistway 12. As shown in FIG. 6, drive motor 320 and drive pulley 322 are mounted to floor 324 within hoist pit 326. The flat rope or belt 328 is operatively coupled with the drive pulley 322 to vertically move the elevator car 16 and the counterweight 316 along the hoistway 12. The flat rope 328 has first and second ends 330, 332 connected within the top of the hoistway 12. As shown in FIG. 6, the first end 330 of the flat rope 328 is connected to the second support member 310, and the second end 332 is connected to the elevator car with respect to the first end 330. On the opposite side of 16 is connected to the ceiling 334 of the hoistway 12. The flat rope 328 extends downwardly from the first end 330 in the second support member 310, is extended upward and loops 180 ° around the first deflection pulley 312, and extends downward to drive the pulley ( 322 looped around, extending upwards 180 ° around the second deflection pulley 314 and extending downward to lower the elevator car 16 through the first and second elevator pulleys 20, 22. Suspension, upward extension ends at the second end 332 of the ceiling 334 of the hoistway.

In operation, the drive motor 320 rotates the drive pulley 322 clockwise to pull a portion of the flat rope 328 downward between the elevator pulley 322 and the second support member 310. Signaled). This downward movement of the flat rope 328 shortens a portion of the flat rope length between the second end 332 and the second deflection pulley 314 of the flat rope by rotating the second deflection pulley 314. The elevator pulleys 20, 22 move the elevator car 16 upward along the hoistway 12 by rolling towards this second end 332 by this shortened portion of the flat rope 328. The drive pulley 322, which rotates clockwise, moves a portion of the flat rope 328 between the drive pulley 322 and the first deflection pulley 302 to rotate the first deflection pulley to rotate the counterweight 316. It is possible to move downward along the hoistway (12).

The drive motor 320 is signaled by a controller (not shown) that rotates the drive pulley 322 counterclockwise to move a portion of the flat rope 328 up between the drive pulley and the second support member 310. do. This upward movement of the flat rope 328 may rotate the second deflection pulley 310 to increase a portion of the flat rope length between the second deflection pulley and the second end 332 of the flat rope. The elevator pulleys 20, 22 are rolled away from the second end 332 by this elongate portion of the flat rope, thereby moving the elevator car 16 downward along the hoistway 12. The drive pulley 322, which rotates counterclockwise, also moves the portion of the flat rope 328 downward between the drive pulley and the first deflection pulley 302 to rotate the first deflection pulley to rotate the counterweight 316. It is possible to move upward along the hoistway 12.

The main feature of the present invention lies in the flatness of the rope used in the elevator system described above. Increasing the aspect ratio is optimal for distributing the rope pressure and provides a rope having a mating surface formed by the width dimension w. Thus, the maximum rope pressure is minimized in the rope. In addition, by increasing the aspect ratio for a round rope having an aspect ratio equal to 1, the thickness t1 of the flat rope (FIG. 8) is reduced while maintaining a constant rope cross-sectional area supporting tension loads on the rope.

As shown in FIGS. 7 and 8, the flat rope 722 includes a number of individual load transfer cords 726 embedded within a common coating layer 728. The coating layer 728 separates each cord 726 and defines a mating surface 730 for mating with the pulley 724. The load transfer cord 726 is formed of a high strength light weight nonmetal material such as aramid fiber, or a metal material such as thin high carbon steel fiber. It is desirable to keep the thickness d of cord 726 as small as possible to maximize flexibility and minimize stress in the cord. Further, for cords formed of steel fibers, the diameter of the fibers is preferably 0.25 mm or less, preferably 0,20 mm. Steel fibers with these diameters improve the flexibility of cords and ropes. By associating a cord with a flat rope having the following characteristics, i.e., weight, strength, durability and especially flexibility, the pulley pulley diameter D is reduced while maintaining the maximum rope pressure within an acceptable value.

The engagement surface 730 is in contact with the corresponding surface 750 of the pulley 724. Coating layer 728 is formed of a polyurethane material, preferably thermoplastic urethane, which is compressed through multiple cords 726 in such a way that each cord 726 is inhibited in longitudinal movement relative to the other cord 726. do. Other materials may also be used as coating layers as long as they meet the required coating layer functions, such as traction, wear, towing load transfer to the cord, resistance to environmental elements, and the like. Other materials may be used if the mechanical properties of the thermoplastic urethanes are not exceeded or not met, but the advantages of using flat ropes will be reduced. Due to the mechanical properties of the thermoplastic urethane, the diameter of the pulley pulley 724 can be reduced to 100 mm or less.

By the shape of the flat rope 722, the rope pressure can be more evenly distributed to the rope 722. Since many small cords 726 are associated with the flat rope elastomeric coating layer 728, the pressure on each cord 726 is significantly reduced compared to conventional ropes. The cord pressure will be reduced to at least n ^-1/2 , where n is the number of parallel cords in a flat rope with a given load and wire cross section. Thus, the maximum rope pressure in flat ropes is considerably reduced compared to conventional rope type elevators with similar load carrying capacity. In addition, the effective rope diameter d (measured in the bending direction) is reduced to the same load bearing capacity, and a small value for the pulley diameter D can be obtained without reducing the D / d ratio. In addition, minimizing the diameter (D) of the pulley can reduce the cost and achieve a small size, it is possible to use a high-speed motor as a drive device.

7 shows a pulley pulley 724 having a traction surface 750 shaped to receive a flat fore 722. The engagement surface 750 takes a complementary form to guide the engagement between the flat rope 722 and the pulley 724 and provide traction. The pulley pulley 724 includes a pair of rims 744 disposed on opposite sides of the pulley 724 and one or more dividers 745 disposed between adjacent flat ropes. The pulley pulley 724 includes a liner 742 that is received in the space between the rim 744 and the divider 745. The liner 742 defines a mating surface 750 such that there is a lateral gap 754 between the side of the flat rope 722 and the liner 742. The pair of rims 744 and the dividers associated with the liner serve to guide the flat rope 722 to prevent overall alignment issues, such as in loose rope conditions. Although shown as including a liner, it should be appreciated that a linerless pulley can also be used.

The present invention has been described with reference to the preferred embodiments, and is not limited thereto, and one of ordinary skill in the art should recognize that various modifications and changes can be made to the present invention without departing from the appended claims.

Claims (18)

The hoistway formed by the surrounding construction, Counterweights and elevator cars located in the hoistway, A drive motor located between the side walls of the hoistway and the elevator car, And said drive motor operably couples and suspends said elevator car and counterweight through at least one flat rope. 2. The apparatus of claim 1, further comprising first and second support columns positioned on opposite sides of the hoistway relative to each other, and support members mounted to extend horizontally between the first and second support columns at the top of the hoistway. , And each support column is vertically extended from the bottom to the hoistway between the sidewall of the hoistway and the elevator car, on which the drive motor is supported. 3. The counterweight of claim 2, wherein the counterweight is located below the support member between the sidewall of the hoistway and the elevator car, wherein the drive motor includes a drive pulley operatively connecting the elevator car and the counterweight via a flat rope. Elevator system. 4. The apparatus of claim 3, further comprising a counterweight pulley connected to the top of the counterweight and at least one elevator pulley connected to the bottom of the elevator car, wherein the flat rope is first and second ends fixedly connected to the top of the hoistway. Wherein the flat rope extends downwardly from the first end to loop around the counterweight pulley, upwardly loops around the drive pulley, downwardly extends the undercarriage of the elevator car through the at least one elevator pulley, An elevator system, characterized in that it extends upward and terminates at the second end. 5. The elevator system of claim 4, wherein the at least one elevator pulley comprises first and second elevator pulleys located at the bottom of the elevator car on opposite sides. 5. An elevator system according to claim 4, wherein the first end of the flat rope is connected to the support member. 3. The drive motor of claim 2, wherein the drive motor includes a drive pulley for operatively connecting the elevator car and the counterweight through a flat rope, the counterweight being located below the support member between the hoistway sidewall and the elevator car, The rope has a first end connected to the top of the counterweight and a second end connected to the elevator car, the flat rope extending upward from the first end at the counterweight and looping around the drive pulley, extending downward to 1 An elevator system, characterized in that it terminates at a second end to form a: 1 rope form. 3. The elevator of claim 2, wherein the first and second support columns comprise first and second guide members, each guide member extending vertically along the length of the support column corresponding to the elevator car path of travel. And a guide surface, wherein the elevator car is shaped to be movably coupled with the elevator guide surface when the elevator car moves vertically along the support column. 9. The counterweight of claim 8, wherein each of the first and second guide members defines a counterweight guide surface extending vertically along the length of the support column corresponding to the path of travel of the counterweight. Elevator system characterized in that it takes the form that can be movably coupled with the counterweight guide surface when moving vertically along. 2. The elevator system of claim 1, wherein the drive motor is fixed to one of the ceilings of the hoistway and the sidewalls of the hoistway. 11. The elevator system of claim 10, wherein the drive motor is connected to a side wall of the hoistway. 11. The elevator system of claim 10, wherein the flat rope includes first and second ends connected to one of the hoist ceilings and the side walls. 11. The elevator system of claim 10, wherein the flat rope includes first and second ends connected to the ceiling of the hoistway. The counterweight of claim 12, wherein the counterweight is positioned below the support member between the hoistway sidewall and the elevator car, the counterweight pulley connected to the top of the counterweight, at least one elevator pulley connected to the bottom of the elevator car, and the drive motor. And a drive pulley operatively connected to the flat rope, the flat rope extending downward from the first end and looping around the counterweight pulley, upwardly looping around the drive pulley, extending downward and at least one elevator. The elevator system, characterized in that the suspension suspension down the elevator car through the pulley, is extended upward and terminated at the second end. 2. The first support member according to claim 1, wherein the first support member is disposed on the opposite side of the hoistway between the hoistway sidewall and the elevator car and moves horizontally therebetween, and the hoistway opposite the hoistway between the first support member and the elevator car. A second support member disposed on the side and horizontally moved therebetween, first and second deflection pulleys connected to the first and second support members, counterweight pulleys connected to the counterweight, and connected to the lower part of the elevator car. And at least one elevator pulley, wherein the drive motor and the drive pulley are disposed below the hoistway between the hoistway sidewall and the elevator car. 16. The flat rope of claim 15, wherein the flat rope has a first end connected to a second support member and a second end connected to one of the side walls and the ceiling of the hoistway above the hoistway, the flat rope extending downward from the first end. Looped around the counterweight pulley, extended upward looped around the first deflection pulley, extended downward looped around the drive pulley, extended upward looped around the second deflection pulley, extended downward and at least one elevator pulley Suspending the elevator car through the elevator system, characterized in that the upward extension is terminated at the second end. 16. The elevator system of claim 15, wherein the flat rope has a second end connected to the hoist ceiling. 16. The elevator system of claim 15, wherein the at least one elevator pulley comprises first and second elevator pulleys positioned at the bottom of the elevator car on opposite sides with respect to each other.