Elevator

Abstract

To provide an elevator in which vibrations generated when a braking part is operated are suppressed from being transmitted to a hoist.SOLUTION: The present invention comprises a car capable of moving along a hoistway, a main rope connected to the car, a hoist that drives the main rope, a braking unit attached to the hoist to control the drive of the hoist, and a damping unit provided between the braking unit and the hoist to damp vibrations transmitted from the braking unit to the hoist.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an elevator in which a braking unit is provided in a hoisting machine. [Background technology]

[0002] As an elevator hoist, there is known a hoist that includes a sheave and suspends a car and a counterweight from a main rope hung on the sheave (Patent Document 1). This hoist is provided with a brake. As shown in FIG. 5, this brake 9 includes a rotor 90 that rotates in conjunction with a sheave 900 of the hoist, a lining 91 that is provided so as to be movable toward and away from the rotor 90, and an actuator 92 that generates a force that moves the lining 91 away from the rotor 90. The brake 9 also includes a caliper 93 to which the lining 91 is attached, a lever 94 to which the caliper 93 is attached, and a biasing member 95 that presses the lining 91 against the rotor 90 via the lever 94.

[0003] 6, the actuator 92 includes a movable core 920 that is provided so as to be movable in one direction, and a coil 921 that is disposed around the movable core 920. The actuator 92 also includes a casing 922 that covers the movable core 920 and the coil 921, and an operating shaft 923 that is concentrically connected to the movable core 920 within the casing 922 and protrudes from the casing 922.

[0004] When the car ascends or descends, this hoist controls the torque with the brake 9 released to achieve a target speed that takes into consideration safety and passenger comfort, and rotates the sheave to raise or lower the car and the counterweight. When the car arrives at a stopping floor, the hoist similarly controls the torque with the brake 9 released, smoothly stopping the car and then engaging the brake 9.

[0005] To raise and lower the car, specifically, the coil 921 of the actuator 92 is energized. Then, the coil 921 is excited, and the magnetic field formed by the coil 921 tries to move the movable core 920 in one direction (leftward in FIG. 6). Then, when the force in one direction trying to move the movable core 920 becomes a force capable of pushing back the lever 94 biased by the biasing member 95, the movable core 920 moves in one direction, and the operating shaft 923 also moves in one direction. Accordingly, the operating shaft 923 pushes the lever 94, tilting the lever 94 to the side away from the rotor 90, and moving the lining 91 away from the rotor 90 (see FIG. 5). As a result, the brake 9 releases the fastening of the rotor 90, and the sheave connected to the rotor 90 rotates by the drive of the motor connected to the rotor 90, raising and lowering the car. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-043776 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the above elevator, when the operating shaft 923 of the actuator 92 moves in one direction, the movable iron core 920 may collide with the casing 922, causing an impact (vibration). When the impact caused by the brake 9 operating is transmitted to the hoist, the brake 9 may become a vibration source for the hoist. Specifically, when the vibration caused by the brake 9 operating is transmitted to the hoist, noise generated by the hoist may be propagated through the air in the landing or car, or the noise may be propagated through solid objects in the building.

[0008] An object of the present invention is to provide an elevator in which vibrations generated when the braking unit is activated are prevented from being transmitted to the hoist. [Means for solving the problem]

[0009] The elevator of the present invention is a car movable along a hoistway; A main rope connected to the cage; A hoist that drives the main rope; A braking unit attached to the hoist and controlling the driving of the hoist; The braking system further includes a damping section provided between the braking section and the hoisting machine, which dampens vibrations transmitted from the braking section to the hoisting machine.

[0010] According to this configuration, a damping section is provided between the braking section and the hoisting machine, so that vibrations generated in the braking section are damped by the damping section when they are transmitted to the hoisting machine, thereby suppressing the vibrations transmitted to the hoisting machine.

[0011] In the elevator, The damping portion may be configured to fix the position of the brake portion relative to the hoist.

[0012] According to this configuration, the position of the braking unit relative to the hoist is fixed to prevent positional deviation, so that the braking unit can reliably release and fasten the brake.

[0013] In the elevator, The damping unit has a vibration transmission path from the braking unit to the hoist, The length of the transmission path may be longer than a straight-line distance between the braking unit and the hoist. Good too.

[0014] According to this configuration, the transmission path is lengthened, so that the amount of attenuation of the vibration from the braking unit before it is transmitted to the hoisting machine is increased. Effect of the Invention

[0015] As described above, according to the present invention, an elevator can be provided in which the vibrations generated when the braking unit is activated are prevented from being transmitted to the hoist. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a perspective view of an elevator according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the elevator hoist and braking unit. [Diagram 3] FIG. 3 is a front view including a partial half-section of the braking section of the elevator. [Figure 4] FIG. 4 is a schematic front view of the periphery of a damping portion of an elevator according to modified examples, where (a) shows a damping portion of a first modified example, and (b) shows a damping portion of a second modified example. [Diagram 5] FIG. 5 is a front view of a hoist and a brake unit of a conventional elevator. [Figure 6] FIG. 6 is a front view including a partial half section of the braking portion of the elevator. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0018] As shown in Fig. 1, elevator 1 includes car 3 movable along hoistway 2, main ropes 4 connected to car 3, and hoisting machine 5 that drives main ropes 4. Elevator 1 also includes a braking unit 6 attached to hoisting machine 5 and that brakes the drive of hoisting machine 5. Furthermore, elevator 1 also includes a damping unit 7 provided between braking unit 6 and hoisting machine 5 and that damps vibrations transmitted from braking unit 6 to hoisting machine 5, as shown in Fig. 2.

[0019] The main rope 4 is a rope that suspends the car 3 and the counterweight.

[0020] The hoisting machine 5 includes a sheave 51 around which the main ropes 4 are wound, and a motor 52 having a rotor (not shown in FIG. 1), with the sheave 51 being directly or indirectly connected to the rotor. As shown in FIG. 2, the motor 52 includes a motor housing 520 that supports the rotor rotatably around an axis extending in one direction (the door opening / closing direction, the direction perpendicular to the paper surface in FIG. 2). In this embodiment, the sheave 51 is concentrically connected to the rotor of the motor 52. The hoisting machine 5 is fixed to a building in which the hoistway 2 is provided via a foundation 53 (see FIG. 1).

[0021] In the elevator 1, when the car 3 rises or falls, the hoist 5 controls the torque with the brake unit 6 released so that the car 3 reaches a target speed that takes into consideration safety and passenger comfort, and raises or lowers the car 3 and the counterweight by rotating the sheave 51. When the car 3 arrives at a stopping floor, the hoist 5 controls the torque in the same manner with the brake unit 6 released, smoothly stopping the car 3, and then the brake unit 6 is engaged.

[0022] The braking unit 6 is a drum brake. In this embodiment, the braking unit 6 is disposed above the hoisting machine 5 with the damping unit 7 therebetween (see FIG. 2). The braking unit 6 may be disposed below the hoisting machine 5 with the damping unit 7 therebetween. The braking unit 6 may also be disposed so as to sandwich the damping unit 7 together with the hoisting machine in the horizontal direction.

[0023] The braking unit 6 also includes a rotor 60 that is mechanically connected to the sheave 51 and rotates in conjunction with the sheave 51. The braking unit 6 also includes a lining 61 that is provided so as to be movable toward and away from the rotor 60, and an actuator 62 that generates a force that moves the lining 61 away from the rotor 60. The braking unit 6 also includes a caliper 63 to which the lining 61 is attached, a lever 64 to which the caliper 63 is attached, and a biasing member 65 that presses the lining 61 against the rotor 60 via the lever 64.

[0024] The rotating body 60 includes a cylindrical drum-shaped main body 600. The outer peripheral surface of the main body 600 is a smooth braking surface.

[0025] The lining 61 is a member that can come into contact with the rotating body 60. In this embodiment, the lining 61 can appropriately adjust the gap with respect to the outer circumferential surface of the main body 600 of the rotating body 60. Specifically, the gap between the lining 61 and the outer circumferential surface of the main body 600 of the rotating body 60 is, for example, 1 mm or less. For example, the lining 61 is formed in an arc shape so as to fit along the outer circumferential surface of the main body 600 of the rotating body 60.

[0026] In this embodiment, the braking unit 6 includes a pair of linings 61. The pair of linings 61 are arranged to sandwich the rotating body 60. Specifically, the pair of linings 61 are arranged to sandwich the rotating body 60 in the horizontal direction (specifically, the direction of getting on and off the car 3, the left-right direction in FIG. 2). Hereinafter, the direction of getting on and off the car 3 is also referred to as one direction.

[0027] The caliper 63 is a member that connects the lining 61 and the lever 64. In this embodiment, the braking unit 6 includes a pair of linings 61 and therefore a pair of calipers 63. The pair of calipers 63 are disposed on either side of the rotating body 60. Each of the pair of calipers 63 has a mounting surface 630 to which the lining 61 is attached, the mounting surface 630 being provided at one end in one direction, and a pivotal attachment part 631 rotatably connected to the lever 64, the pivotal attachment part 631 being provided at the other end in the one direction.

[0028] The lever 64 is a member that connects the actuator 62 and the caliper 63. In this embodiment, the braking unit 6 includes a pair of linings 61 (a pair of calipers 63) and therefore a pair of levers 64. The pair of levers 64 are disposed with the rotating body 60 sandwiched therebetween.

[0029] Each of the pair of levers 64 is an elongated member. A first end of each of the pair of levers 64 is pivotally attached to the motor 52. In this embodiment, a pivotal attachment portion 640 that is connected to the motor 52 is provided at the first end of each of the pair of levers 64. A second end of each of the pair of levers 64 faces the actuator 62. In this embodiment, an adjustment screw 641 that is screwed with the second end of each of the pair of levers 64 so as to be movably advanced and retreated in the lateral direction and faces the actuator 62 is provided at the second end of each of the pair of levers 64.

[0030] A pivot portion 631 of the corresponding caliper 63 is rotatably connected to a midpoint between the first end and the second end of each of the pair of levers 64 .

[0031] The biasing member 65 is a member that biases the lever 64 toward the rotating body 60. In addition, the biasing member 65 presses the lining 61 against the rotating body 60 via the lever 64. In this embodiment, the biasing member 65 is, for example, a compression coil spring that is elastically deformable in one direction.

[0032] The actuator 62 is a device that generates a force that separates the lining 61 from the rotor 60. In this embodiment, as shown in Fig. 3, the actuator 62 includes a movable core 620 that is provided so as to be movable in one direction, a coil 621 that is disposed around the movable core 620, and a casing 622 that covers the movable core 620 and the coil 621. The actuator 62 also includes an operating shaft 623 that is coupled to the movable core 620 and connected to the lining 61 so as to generate a force that separates the lining 61 from the rotor 60.

[0033] To raise or lower the car 3, specifically, the coil 621 of the actuator 62 is energized. Then, the coil 621 is excited, and a magnetic field formed by the coil 621 tries to move the movable iron core 620 in one direction (the movable iron core 620 on the left side of FIG. 3 moves leftward, and the movable iron core 620 on the right side moves rightward). Then, when the force in one direction that tries to move the movable iron core 620 becomes a force that can push back the lever 64 biased by the biasing member 65, the movable iron core 620 moves in one direction, and the operating shaft 623 also moves in one direction. Accordingly, the operating shaft 623 pushes the lever 64 via the adjustment screw 641, tilting the lever 64 to the side away from the rotating body 60, and moving the lining 61 away from the rotating body 60 (see FIG. 2). As a result, the brake unit 6 releases the rotor 60 from its fastening, and the sheave 51 connected to the rotor 60 rotates by the drive of the motor 52 connected to the rotor 60, causing the car 3 to rise and fall.

[0034] The damping unit 7 is configured to fix the position of the braking unit 6 relative to the hoisting machine 5. The damping unit 7 has sufficient rigidity so that the position of the braking unit 6 relative to the hoisting machine 5 does not move when the braking unit 6 is driven. Since the damping unit 7 has sufficient rigidity, the position of the braking unit 6 relative to the hoisting machine 5 is fixed, and the braking unit 6 operates appropriately. For example, each of the pair of linings 61 of the braking unit 6 can abut against the rotating body 60 in a well-balanced manner.

[0035] In this embodiment, the damping section 7 has a brake section mounting section 70 attached to the brake section 6, a hoist mounting section 71 attached to the hoist 5, and a connection section 72 connecting between the brake section mounting section 70 and the hoist mounting section 71. Furthermore, a pair of damping sections 7 are provided spaced apart from each other in the horizontal direction.

[0036] In this embodiment, the damping section 7 is bellows-shaped. Specifically, the damping section 7 has a horizontal extension section 73 extending along the horizontal direction and a vertical extension section 74 extending along the vertical direction. That is, the damping section 7 has the vertical extension section 74 extending in the arrangement direction of the braking section 6 and the hoisting machine 5 (the vertical direction in this embodiment), and the horizontal extension section 73 extending in a direction intersecting with the arrangement direction.

[0037] In this damping section 7, the brake unit mounting section 70 is composed of the uppermost vertical extension section 740, and the hoist mounting section 71 is composed of the lowermost vertical extension section 741. The connection section 72 includes both the horizontal extension section 73 and the vertical extension section 74. In this embodiment, the connection section 72 includes a plurality of (specifically, six) horizontal extension sections 73 and a plurality of (specifically, five) vertical extension sections 74. The number of the horizontal extension sections 73 and the vertical extension sections 74 included in the connection section 72 is not limited. In this embodiment, the transition section between the horizontal extension section 73 and the vertical extension section 74 is an angle, but may be a curved shape.

[0038] In this embodiment, the damping portion 7 is made of a metal plate. The damping portion 7 is formed by casting, for example.

[0039] Furthermore, the damping unit 7 has a vibration transmission path from the braking unit 6 to the hoisting machine 5. The length of this transmission path is longer than the linear distance between the braking unit 6 and the hoisting machine 5. In this embodiment, the transmission path includes a portion extending in the arrangement direction of the braking unit 6 and the hoisting machine 5 (in this embodiment, the vertical direction) and a portion extending in a direction intersecting this arrangement direction (in this embodiment, the horizontal direction, specifically, in one direction). Note that the linear distance between the braking unit 6 and the hoisting machine 5 is the linear distance in the arrangement direction of the actuator 62 and the hoisting machine 5 (in this embodiment, the vertical direction).

[0040] In this elevator 1, the hoisting machine 5 is attached to the damping unit 7, and the braking unit 6 is attached to the damping unit 7, so that the braking unit 6 is integrated with the hoisting machine 5. That is, in this embodiment, the motor 52 is a motor with a brake.

[0041] In an elevator equipped with such a braking unit 6, if the damping unit 7 is not provided between the hoisting machine 5 and the braking unit 6, the impact of the braking unit 6 being activated is transmitted to the hoisting machine 5, and the braking unit 6 may become a vibration source of the hoisting machine 5. Specifically, when the operating shaft 623 of the actuator 62 of the braking unit 6 moves in one direction, the movable iron core 620 may collide with the casing 622, causing an impact (vibration). As a result of the vibration generated when the braking unit 6 is activated being transmitted to the hoisting machine 5 in this way, noise generated by the hoisting machine 5 may be propagated through the air to the landing or inside the car. In addition, the vibration generated by the braking unit 6 may be propagated through solids via the hoisting machine 5 to the building in which the hoistway 2 is provided.

[0042] In contrast, in the elevator 1, the damping unit 7 is provided between the braking unit 6 and the hoisting machine 5, so that the vibrations generated in the braking unit 6 are damped by the damping unit 7 when they are transmitted to the hoisting machine 5, thereby reducing the vibrations transmitted to the hoisting machine 5. In addition, the vibrations transmitted to the building in which the hoistway 2 is provided via the hoisting machine 5 are also suppressed.

[0043] In the elevator 1 of this embodiment, the position of the braking unit 6 relative to the hoisting machine 5 is fixed to suppress positional deviation, so that the braking unit 6 can reliably release or fasten the brakes.

[0044] In the elevator 1 of this embodiment, the vibration transmission path from the braking unit 6 to the hoisting machine 5 includes a portion that extends in a direction (in this embodiment, horizontally, specifically, in one direction) that intersects with the arrangement direction of the braking unit 6 and the hoisting machine 5. By lengthening this transmission path, the amount of attenuation of the vibration from the braking unit 6 until it is transmitted to the hoisting machine 5 increases.

[0045] It should be noted that the elevator of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, or part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0046] In the above embodiment, the damping section 7 has a bellows shape, but may have other shapes. For example, the damping section 7 may be composed of a brake unit mounting section 70 extending in the vertical direction, a hoist mounting section 71 extending in the vertical direction, and a connection section 72 (connection section 72 composed of one horizontal extension section 73) that connects between the lower end edge of the brake unit mounting section 700 and the hoist mounting section 71 and extends in the horizontal direction.

[0047] 4(a), the damping section 7 may have a brake unit mounting section 70 and a hoisting machine mounting section 71 each extending horizontally, and a curved connecting section 72 connecting the brake unit mounting section 70 and the hoisting machine mounting section 71. Specifically, the connecting section 72 is arc-shaped (e.g., semicircular arc-shaped), but may also be thin U-shaped or the like. In this damping section 7, the connecting section 72 extends in a direction intersecting the arrangement direction of the brake unit 6 and the hoisting machine 5 (in the present embodiment, the vertical direction).

[0048] As shown in FIG. 4(b), the damping section 7 may have two plates connected at the center in the arrangement direction of the brake section 6 and the hoist 5 (vertical direction in this embodiment). Specifically, the damping section 7 may have a brake section mounting section 70 and a hoist mounting section 71 each extending in the horizontal direction, and a flat connecting section 72 connecting the brake section mounting section 70 and the hoist mounting section 71. In the damping section 7, the two plates are connected to each other at the center in the vertical direction of the connecting section 72. Also, in the damping section 7, the connecting section 72 extends in a direction intersecting the arrangement direction of the brake section 6 and the hoist 5 (vertical direction in this embodiment).

[0049] In the above embodiment, the damping section 7 is made of metal, but it may be formed by combining a metal member with a member made of another material (e.g., a rubber elastic member). For example, the damping section 7 may be formed by combining a bellows-shaped metal member with an elastic member disposed in the gaps between the metal members. The damping section 7 may be formed only of an elastic member.

[0050] In the above embodiment, the braking unit 6 is a drum brake, but may be another type of brake (for example, a disk brake, etc.). [Explanation of symbols]

[0051] 1... elevator, 2... hoistway, 3... cage, 4... main rope, 5... hoisting machine, 6... braking unit, 7... damping unit, 9... brake, 51... sheave, 52... motor, 53... base, 60... rotating body, 61... lining, 62... actuator, 63... caliper, 64... lever, 65... biasing member, 70... braking unit mounting portion, 71... hoisting machine mounting portion, 72... connection portion, 73... horizontal extension portion, 74... vertical extension portion, 90... rotating body, 91... lining, 92... actuator actuator, 93...caliper, 94...lever, 95...biasing member, 520...motor housing, 600...main body, 620...movable core, 621...coil, 622...casing, 623...operating shaft, 630...mounting surface, 631, 640...pivot portion, 641...adjusting screw, 700...braking portion mounting portion, 740...vertical extension portion, 741...vertical extension portion, 900...sheave, 920...movable core, 921...coil, 922...casing, 923...operating shaft

Claims

1. a car movable along a hoistway; A main rope connected to the cage; A hoist that drives the main rope; A braking unit attached to the hoist and controlling the driving of the hoist; A damping unit is provided between the braking unit and the hoisting machine, and damps vibration transmitted from the braking unit to the hoisting machine. An elevator, wherein the damping portion is made of a metal plate and has a bellows shape in which first extension portions extending in the alignment direction of the braking portion and the hoist and second extension portions extending in a direction intersecting the alignment direction are arranged alternately.

2. A car movable along a hoistway; A main rope connected to the cage; A hoist that drives the main rope; A braking unit attached to the hoist and controlling the driving of the hoist; A damping unit is provided between the braking unit and the hoisting machine, and damps vibration transmitted from the braking unit to the hoisting machine. The damping section is made of a metal plate and has a brake section mounting section attached to the brake section and extending horizontally, a hoisting machine mounting section attached to the hoisting machine and extending horizontally, and a curved connection section connecting the brake section mounting section and the hoisting machine mounting section.

3. A car movable along a hoistway; A main rope connected to the cage; A hoist that drives the main rope; A braking unit attached to the hoist and controlling the driving of the hoist; A damping unit is provided between the braking unit and the hoisting machine, and damps vibration transmitted from the braking unit to the hoisting machine. An elevator, wherein the damping section is configured such that two metal plate-shaped portions are connected so as to intersect at the center in the arrangement direction of the braking section and the hoist.

4. The elevator according to any one of claims 1 to 3, wherein the damping section is configured to fix the position of the braking section relative to the hoist.

5. The damping unit has a vibration transmission path from the braking unit to the hoist, The elevator according to any one of claims 1 to 3, wherein the length of the transmission path is longer than a straight-line distance between the braking unit and the hoist.

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