Elevator

Abstract

To constitute a vertical vibration suppressing device for an elevator car at a low cost.SOLUTION: An elevator according to the present invention includes: a guide rail 20 installed in a hoistway; and an elevator car that moves upward and downward in the hoistway while a roller guide type guide body 32 is guided by the guide rail 20. As a vertical vibration suppressing device for the elevator car, the elevator includes a baking-force generation unit comprising a magnetic brake, magnetic coupling or mechanical coupling that is provided coaxially with a roller 326 in the guide body 32 and applies a braking force to the roller 326. These are magnetic or mechanical units that do not use electricity. Accordingly, there is no need for electronic components such as sensors, hardware and software related to a control unit, and electrical wiring, and the vertical vibration suppressing device can be constituted at a low cost.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an elevator in which a car suspended by ropes rises and falls within a hoistway. [Background technology]

[0002] In this type of elevator, when passengers get on after the car has stopped at a floor, the weight of the passengers causes the rope suspending the car to expand and contract, causing the car to swing up and down, resulting in a bouncy vibration (hereinafter referred to as "vertical vibration").The conventional problem has been how to suppress the vertical vibration of the car, which passengers find uncomfortable.

[0003] The elevator in Patent Document 1 has a roller guide type guide body that is attached to a designated location on the car and guided by a guide rail; when a sensor detects that vertical vibration has occurred in the car, power is supplied to an electromagnetic brake to apply a braking force to the rollers of the guide body, generating friction between the rollers and the guide rail, thereby suppressing the vertical vibration of the car. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2003-104655 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the car vertical vibration suppression device in Patent Document 1 requires electronic components such as sensors, hardware and software related to a control unit, and electrical wiring, which results in a problem of considerable cost.

[0006] The present invention has been made in view of the above circumstances, and has an object to provide a car vertical vibration suppression device that can be constructed at low cost. [Means for solving the problem]

[0007] The elevator according to the present invention comprises: An elevator comprising a guide rail installed in a hoistway, and a car that moves up and down in the hoistway while being guided by a roller guide type guide body on the guide rail, The car vertical vibration suppression device is provided with a braking force generating unit, which is a magnetic brake or a magnetic coupling that is provided coaxially with the rollers in the guide body and applies a braking force to the rollers. It's an elevator.

[0008] Another elevator according to the present invention is An elevator comprising a guide rail installed in a hoistway, and a car that moves up and down in the hoistway while being guided by a roller guide type guide body on the guide rail, The car vertical vibration suppression device is provided with a braking force generating unit that is arranged coaxially with the roller in the guide body and is made of a mechanical coupling that applies a braking force to the roller. It's an elevator.

[0009] Here, as one aspect of the elevator according to the present invention, The roller guide type guide body includes a pair of guide surface abutment portions that abut against two guide surfaces of the guide rail located in the thickness direction, and a tip surface abutment portion that abuts against a tip surface located between the widthwise tip edges of the two guide surfaces of the guide rail, The braking force generating portion is provided for the roller at the tip surface contact portion. The above configuration can be adopted.

[0010] Also, in this case, The braking force generating unit includes a fixed body supported by the guide body and a rotating body coaxially attached to the roller. The above configuration can be adopted. Effect of the Invention

[0011] According to the present invention, a magnetic or mechanical braking force generating unit that does not use electricity is used as the car vertical vibration suppression device, and therefore, according to the present invention, electronic components such as sensors, hardware and software related to the control unit, and electrical wiring are not required, and the car vertical vibration suppression device can be configured at low cost. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic perspective view of an elevator according to this embodiment. [Diagram 2] Fig. 2(a) is a plan view of a guide body provided in an elevator car, and Fig. 2(b) is a front view of the guide body. [Diagram 3] Fig. 3(a) is a plan view of a guide body to which a braking portion has been added, and Fig. 3(b) is a front view of the guide body to which a braking portion has been added. [Figure 4] Fig. 4(a) is a vertical cross-sectional view of a magnetic brake, which is an example of a braking force generating section that is the main component of the braking section, and Fig. 4(b) is a vertical cross-sectional view of a magnetic coupling, which is another example of a braking force generating section. [Diagram 5] Fig. 5(a) is a vertical sectional view of a mechanical coupling which is yet another example of the braking force generating unit, and Fig. 5(b) is an explanatory diagram relating to the operation of the braking force generating unit (the upper diagram in Fig. 5(b) is a diagram relating to one of the left and right guide bodies, and the lower diagram in Fig. 5(b) is a diagram relating to the other of the left and right guide bodies). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The elevator according to this embodiment will be described below.

[0014] <Overall elevator configuration> As shown in Fig. 1, elevator 1 includes a hoistway 2, a car 3, and a drive mechanism 4 for the car 3. The hoistway 2 extends vertically in a building having several floors. The car 3 ascends and descends in the hoistway 2 by being driven by the drive mechanism 4, and stops at a designated floor by stopping the drive mechanism 4.

[0015] Guide bodies 32 are attached to the upper left and right ends and the lower left and right ends of the car frame 31 of the car 3. A pair of guide rails 20, 20 extending in the vertical direction are arranged on both sides of the car 3 in the hoistway 2. The car 3 can move up and down in the hoistway 2 while the four guide bodies 32, ... on the top, bottom, left and right sides, are guided by the pair of guide rails 20, 20.

[0016] The car 3 is equipped with a car door 34. The car door 34 moves laterally to open and close an opening (entrance) on the front side of the car 3 to allow passengers to get on and off. The car door 34 may be of a double-door type or a single-door type.

[0017] On the other hand, the landing 25 on each floor is equipped with a landing door 27. The landing door 27 moves laterally to open and close an opening in the jamb 26 to allow passengers to get on and off. The landing door 27 also comes in a double-leaf type and a single-leaf type corresponding to the car door 34. The landing door 27 is normally closed, and is opened and closed following the opening and closing operation of the car door 34 of the car 3 stopped at the floor.

[0018] The drive mechanism 4 includes a car sheave 40, a hoist 41, a counterweight 42, a counterweight sheave 43, and a main rope 44. The sheave refers to a rope. The drive sheave of the hoist 41 is driven to rotate, causing the main rope 44 to run, and as a result, the car 3 to which the car sheave 40 is attached rises and falls in the hoistway 2. Similarly, as the main rope 44 runs, the counterweight 42 to which the counterweight sheave 43 is attached rises and falls in the hoistway 2.

[0019] <Configuration of Guide Rail 20> 2, the guide rail 20 has a T-shape in a plan view, and includes a base 200 and a protruding portion 201. The base 200 is in the form of a strip extending in the vertical direction, is disposed parallel to the wall surface of the hoistway 2, and is attached to the wall surface of the hoistway 2 using rail clips 206. The protruding portion 201 is in the form of a strip extending in the vertical direction, is connected at one side to the center of the base 200, and protrudes perpendicularly from the base 200.

[0020] The protruding portion 201 includes a connecting portion 202 and a guide portion 203. The connecting portion 202 connects the base portion 200 and the guide portion 203. The connecting portion 202 is narrower than the guide portion 203 and forms a constricted portion in the protruding portion 201. The guide portion 203 slides against the guide body 32 and guides the guide body 32 to move linearly in the vertical direction. The guide portion 203 includes two guide surfaces 204, 204 and a tip surface 205. The two guide surfaces 204, 204 are surfaces located in the thickness direction of the guide portion 203 and are parallel to each other or face each other in a tapered shape with the tip side narrowing. The tip surface 205 is a surface located between the widthwise tip edges of the two guide surfaces 204, 204 and is a flat surface or a curved surface such as a circular arc surface.

[0021] <Configuration of guide body 32> The guide body 32 is of a roller guide type and includes a base 320, a pair of guide surface contact portions 321, 321, and a tip surface contact portion 325.

[0022] The base 320 is attached directly or indirectly via a mounting member such as a bracket to each of the upper left and right ends and each of the lower left and right ends of the car frame 31 of the car 3. The base 320 is a fixed portion of the guide body 32. The base 320 is provided with an extension portion 320a that extends upward (or downward if the guide body 32 is attached upside down) at a location that faces the tip surface 205 of the guide rail 20 with a gap therebetween.

[0023] The guide surface abutment portion 321 includes a roller 322 and an arm 323. The roller 322 is disposed so that the rotation surface thereof is along the longitudinal direction of the guide rail 20, and abuts against the guide surface 204 of the guide rail 20. The arm 323 rotatably supports the roller 322. The arm 323 has a cantilever structure that supports the roller 322 from one side of the roller 322. The base end of the arm 323 is rotatably attached to the base 320. This allows the roller 322 and the arm 323 to swing around the base end of the arm 323. A tension coil spring 324 is interposed between the arm 323 and the extension portion 320a of the base 320. Alternatively, a torsion coil spring is interposed at the base end of the arm 323. As a result, the arm 323 is biased toward the guide surface 204 of the guide rail 20, and the roller 322 is pressed against the guide surface 204 by an elastic force.

[0024] The tip surface abutment portion 325 includes a roller 326 and an arm 327. The roller 326 is disposed so that the rotation surface is along the longitudinal direction of the guide rail 20, and abuts against the tip surface 205 of the guide rail 20. The arm 327 rotatably supports the roller 326. The arm 327 has a cantilever structure that supports the roller 326 from one side of the roller 326. The base end of the arm 327 is rotatably attached to the base 320. This allows the roller 326 and the arm 327 to swing around the base end of the arm 327. A tension coil spring 328 is interposed between the arm 327 and the extension portion 320a of the base 320. Alternatively, a torsion coil spring is interposed at the base end of the arm 327. As a result, the arm 327 is biased toward the tip surface 205 of the guide rail 20, and the roller 326 is pressed against the tip surface 205 by an elastic force.

[0025] In this manner, the guide body 32 includes a plurality of rollers 322, 322, 326 that come into contact with three surfaces of the guide rail 20, namely, the two guide surfaces 204, 204 and the tip surface 205, and moves along the guide rail 20 while rotating these rollers.

[0026] <Configuration of Braking Part 330> The guide body 32 includes a braking portion. Fig. 3 is a diagram in which a braking portion 330 is added to the guide body 32 of Fig. 2. The braking portion 330 is provided on at least one of the four guide bodies 32, ... on the top, bottom, left, and right. Preferably, the braking portion 330 is provided on at least two guide bodies 32, 32, on the left side of either the top or bottom and the right side of either the top or bottom. More preferably, the braking portion 330 is provided on all of the guide bodies 32, ...

[0027] The braking unit 330 includes a bracket 331 and a braking force generating unit 332. The bracket 331 is attached to the base 320. The bracket 331 is a part of the base 320 and is a fixed portion of the guide body 32. The bracket 331 includes an extension 331a extending upward (or downward if the guide body 32 is attached upside down) at a location of the tip surface abutment portion 325 facing the roller 326 with a gap therebetween. The braking force generating unit 332 is attached coaxially with the roller 326 to the other side surface of the roller 326 (the surface opposite to the one side surface cantilevered by the arm 327) and is disposed between the roller 326 and the extension 331a of the bracket 331.

[0028] The braking force generating part 332 has a shape smaller than the diameter of the roller 326 of the tip surface abutment part 325. More specifically, the braking force generating part 332 is a circular body having a diameter smaller than the diameter of the roller 326. The braking force generating part 332 is provided coaxially with the roller 326. The braking force generating part 332 includes a fixed body 333 and a rotating body 334.

[0029] The fixed body 333 includes a shaft 333a coaxial with the central axis. The shaft 333a is inserted into a groove 331b formed in the extension 331a of the bracket 331, and the groove 331b is an arc shape centered on the swing center (base end of the arm 327) of the arm 327 of the tip surface abutment part 325, and at least the part of the shaft 333a inserted into the groove 331b has a cross-sectional shape in which the dimension in the tangential direction of the groove 331b is larger than the width of the groove 331b. That is, at least the part of the shaft 333a inserted into the groove 331b has a non-circular cross-sectional shape. As a result, the shaft 333a can move in the groove 331b in accordance with the swing of the arm 327, and is restrained by the groove 331b and cannot rotate. Alternatively, the fixed body 333 may be slidably engaged with a guide part formed in the extension 331a of the bracket 331. Alternatively, instead of bracket 331, an arm that swings coaxially with arm 327 of tip surface abutment portion 325 may be provided, and fixed body 333 may be supported by the arm so as not to rotate. As a result, fixed body 333 is supported by bracket 331 or the arm so as to be movable and non-rotatable in association with the swing of arm 327 without impeding the swing of arm 327.

[0030] Rotating body 334 is coaxial with fixed body 333 and rotatably supported by fixed body 333. Rotating body 334 includes shaft 334a that is coaxial with the central axis, i.e., coaxial with shaft 333a of fixed body 333. Shaft 334a is attached (fixed) coaxially to roller 326 on the other side surface of roller 326 of tip surface abutment portion 325 (the surface opposite to the one side surface cantilevered by arm 327), and is integrated with roller 326.

[0031] <Specific example 1 of braking force generating unit 332> As shown in FIG. 4(a), the braking force generating unit 332 is, for example, a magnetic brake, a magnetic unit that does not use electricity. In the magnetic brake, one of the fixed body 333 and the rotating body 334 is provided with a hysteresis material 336, and the other is provided with magnets 335, 335 that sandwich the hysteresis material 336 without contact. The magnetic brake constantly applies a braking force (load against the rotation of the roller 326) to the rotating body 334, i.e., the roller 326 of the tip surface abutment portion 325 that is integral with the rotating body 334, by using the hysteresis effect. The configuration shown in FIG. 4(a) is an example of the configuration of the magnetic brake. The magnetic brake can adopt various configurations that are publicly known.

[0032] <Specific example 2 of braking force generating unit 332> As shown in FIG. 4(b), the braking force generating unit 332 is, as another example, a magnetic coupling, a magnetic unit that does not use electricity. In the magnetic coupling, a fixed body 333 and a rotating body 334 are provided with magnets 337, 338 on their opposing surfaces in a non-contact manner. The magnetic coupling constantly applies a braking force (load against the rotation of the roller 326) to the rotating body 334, i.e., the roller 326 of the tip surface abutment portion 325 that is integral with the rotating body 334, by the attraction force between the magnets 337, 338. Note that the configuration shown in FIG. 4(b) is one example of the configuration of the magnetic coupling. The magnetic coupling may be one of various known configurations.

[0033] <Specific example 3 of braking force generating unit 332> As shown in FIG. 5(a), the braking force generating unit 332 is, as another example, a mechanical coupling (torque limiter), which is a mechanical unit that does not use electricity. In the mechanical coupling, one of the fixed body 333 and the rotating body 334 has a ball or pin 339 that is elastically biased toward the other, and the other has a recess 333b that partially receives the ball or pin 339. The mechanical coupling applies a braking force (load against the rotation of the roller 326) to the rotating body 334, that is, the roller 326 of the tip surface abutment portion 325 that is integral with the rotating body 334, by the ball or pin 339 engaging with the recess 333b. However, when the rotation torque of the rotating body 334 exceeds a predetermined limit value and the ball or pin 339 comes out of the recess 333b against the elastic bias, the braking force is released. The configuration shown in FIG. 5(a) is an example of the configuration of a mechanical coupling. The mechanical coupling may have any of a variety of known configurations.

[0034] The configuration of the elevator 1 according to this embodiment is as described above. The braking unit 330 is added to the guide body 32 to configure a vertical vibration suppression device for the car 3. When the car 3 is stopped at a floor, a braking force generated by the braking force generation unit 332 is applied to the rollers 326 of the guide body 32. By applying the braking force to the rollers 326, the rollers 326 are placed in a state in which they cannot rotate (locked state) or in a state in which they rotate but have a large rotation resistance, and a frictional force is generated between the rollers 326 and the guide rail 20. This frictional force becomes a load (resistance force) against the movement of the car 3. As a result, even if vertical vibration occurs in the car 3 or if it is about to occur, the vertical vibration of the car 3 is suppressed by the frictional force based on the braking force.

[0035] Even if the roller 326 is in a non-rotatable state (locked state) due to a large braking force, as shown in FIG. 5(b), the normal force based on the elastic force of the tension coil spring 328 occurs until then, but with the lateral displacement of the car 3 occurring at the timing when the car 3 starts traveling or at a timing thereafter, a normal force exceeding the limit value Nb is instantaneously generated in the roller 326 of the guide body 32, and the frictional force between the roller 326 and the guide rail 20 exceeds the holding force of the braking force generating unit 332, giving the roller 326 an opportunity to start rotating. When the roller 326 starts rotating, the braking force is reduced in the braking force generating unit 332 consisting of a magnetic brake or a magnetic coupling, and the braking force is released (eliminated) in the braking force generating unit 332 consisting of a mechanical coupling. As a result, the roller 326 becomes rotatable and rolls on the guide rail 20 while the car 3 is traveling.

[0036] As described above, according to the elevator 1 of this embodiment, the magnetic or mechanical braking force generating unit 332 that does not use electricity is used as the vertical vibration suppressing device for the car 3. Therefore, according to the elevator 1 of this embodiment, electronic components such as sensors, hardware and software related to the control unit, and electrical wiring are not required, and the vertical vibration suppressing device for the car 3 can be configured at low cost.

[0037] Moreover, in the elevator 1 according to this embodiment, the braking force generation unit 332 is provided on the roller 326 of the tip surface abutment portion 325. More specifically, the braking force generation unit 332 is disposed between the roller 326 and the extension portion 331a of the bracket 331. This location is a location in the guide body 32 where there is relatively more space. Therefore, in the elevator 1 according to this embodiment, it is possible to ensure the arrangement space for the braking force generation unit 332, and the vertical vibration suppression device for the car 3 can be configured compactly.

[0038] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.

[0039] In the above embodiment, the guide surface abutment portion 321 and the tip surface abutment portion 325 oscillate due to elastic biasing, and become movable portions of the guide body 32. However, the present invention is not limited to this. In one or both of the guide surface abutment portion and the tip surface abutment portion, the roller may have a form in which the rotation axis is fixed and does not displace.

[0040] In the above embodiment, the braking force generating portion 332 is provided on the tip surface contact portion 325. However, the present invention is not limited to this. The braking force generating portion may be provided on the guide surface contact portion instead of the tip surface contact portion, or may be provided on the guide surface contact portion in addition to the tip surface contact portion. [Explanation of symbols]

[0041] 1... elevator, 2... hoistway, 20... guide rail, 200... base, 201... protruding portion, 202... connection portion, 203... guide portion, 204... guide surface, 205... tip surface, 206... rail clip, 25... landing, 26... jamb, 27... landing door, 3... car, 31... car frame, 32... guide body, 320... base, 320a... extension portion, 321... guide surface abutment portion, 322... roller, 323... arm, 324... tension coil spring (tension spring), 325... tip surface abutment portion, 326... roller, 327... arm , 328... tension coil spring (tension spring), 330... braking portion, 331... bracket, 331a... extension portion, 331b... groove, 332... braking force generating portion, 333... fixed body, 333a... shaft, 333b... recess, 334... rotating body, 334a... shaft, 335... magnet, 336... hysteresis material, 337, 338... magnet, 339... ball, 34... cage door, 4... drive mechanism, 40... cage sheave, 41... hoist, 42... counterweight, 43... counterweight sheave, 44... main rope

Claims

1. An elevator comprising a guide rail installed in a hoistway, and a car that moves up and down in the hoistway while being guided by a roller guide type guide body on the guide rail, The car vertical vibration suppression device is provided with a braking force generating unit, which is a magnetic brake or a magnetic coupling that is provided coaxially with the rollers in the guide body and applies a braking force to the rollers. Elevator.

2. An elevator comprising a guide rail installed in a hoistway, and a car that moves up and down in the hoistway while being guided by a roller guide type guide body on the guide rail, The car vertical vibration suppression device is provided with a braking force generating unit that is provided coaxially with the roller in the guide body and is made of a mechanical coupling that applies a braking force to the roller. Elevator.

3. The roller guide type guide body includes a pair of guide surface abutment portions that abut against two guide surfaces of the guide rail located in the thickness direction, respectively, and a tip surface abutment portion that abuts against a tip surface located between the widthwise tip edges of the two guide surfaces of the guide rail, The braking force generating portion is provided for the roller at the tip surface contact portion.

3. An elevator according to claim 1 or 2.

4. The braking force generating unit includes a fixed body supported by the guide body and a rotating body coaxially attached to the roller.

4. The elevator of claim 3.

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