Elevator hoist and elevator device

Abstract

To obtain an elevator hoist which can inhibit a hoist brake from being immersed in water and inhibit a temperature in a brake cover from being increased to a high temperature with a simple structure.SOLUTION: A brake disc 36 has a fan structure. In other words, the brake disc 36 rotates to generate airflow from an outer peripheral surface to the outer side. A brake cover 40 has a cover main part 41 and a heat radiation member 42. The heat radiation member 42 is fixed to the cover main part 41 so as to close an opening provided at the cover main part 41. Further, the heat radiation member 42 is disposed at a position which airflow generated by rotation of the brake disc 36 hits.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to elevator machines and elevator systems. [Background technology]

[0002] In conventional elevators, a vertical column is installed in the pit of the elevator shaft. The hoisting machine is fixed on a base. A moving device is provided on the base. The base can be raised along the vertical column by the moving device. The moving device raises the base when the pit is flooded (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-247557 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional elevators such as those described above, in order to raise the heavy hoisting machine, it is necessary to install sufficiently strong vertical columns, bases, moving devices, etc. in the pit, making the structure large-scale.

[0005] On the other hand, if the hoist brake is covered with a cover to prevent water from entering the hoist brake, the heat generated by passing electricity through the hoist brake will be trapped inside the cover, and the hoist brake may be exposed to high temperatures.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an elevator hoist and elevator apparatus that can, with a simple configuration, prevent water from entering the hoist brake while preventing the inside of the brake cover from becoming too hot. [Means for solving the problem]

[0007] The elevator hoist according to the present disclosure has a drive sheave, a hoist motor that rotates the drive sheave, a brake rotor, and a brake body that applies a braking force to the brake rotor, and is equipped with a hoist brake that keeps the drive sheave stationary and a brake cover that covers the hoist brake, and the brake rotor has a fan structure that generates an airflow from the outer circumferential surface outward as it rotates. [Effects of the Invention]

[0008] According to the present disclosure, a simple configuration can be used to prevent water from entering the hoisting machine brake while preventing the temperature inside the brake cover from rising too high. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing an elevator apparatus according to a first embodiment. [Figure 2] FIG. 2 is a side view showing the elevator hoisting machine of FIG. [Figure 3] FIG. 3 is an enlarged side view showing a main part of FIG. 2. [Figure 4] FIG. 4 is a front view showing the hoisting machine body of FIG. 3. [Figure 5] FIG. 10 is a side view showing a main part of an elevator hoisting machine according to a second embodiment. [Figure 6] FIG. 6 is a front view showing the hoisting machine body of FIG. 5. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1 1 is a perspective view showing an elevator apparatus according to embodiment 1. In the figure, a first car guide rail 12, a second car guide rail 13, a first counterweight guide rail 14, and a second counterweight guide rail 15 are installed in an elevator shaft 11.

[0011] The car 16 is provided between the first car guide rail 12 and the second car guide rail 13. The car 16 is guided by the first car guide rail 12 and the second car guide rail 13 and moves up and down in the elevator shaft 11.

[0012] The counterweight 17 is provided between the first counterweight guide rail 14 and the second counterweight guide rail 15. The counterweight 17 is guided by the first counterweight guide rail 14 and the second counterweight guide rail 15 and moves up and down within the hoistway 11.

[0013] A machine base 18 is installed in the pit 11a of the hoistway 11. An elevator hoisting machine 30 is installed on the machine base 18. That is, the elevator hoisting machine 30 is installed in the pit 11a of the hoistway 11. The elevator hoisting machine 30 also has a hoisting machine main body 31 and a drive sheave 32.

[0014] A suspension body 19 is wound around the drive sheave 32. The suspension body 19 is formed of a plurality of ropes or a plurality of belts.

[0015] The car 16 and the counterweight 17 are suspended within the hoistway 11 by a suspension body 19. The car 16 and the counterweight 17 move up and down within the hoistway 11 as the drive sheave 32 rotates.

[0016] A first car sheave 21 and a second car sheave 22 are provided below the car 16. A counterweight sheave 23 is provided above the counterweight 17.

[0017] A first cleat 24 is attached to the upper end of the first car guide rail 12. A first upper beam 25 and a second upper beam 26 are arranged at the top of the hoistway 11. The first upper beam 25 is fixed to the upper end of the first counterweight guide rail 14 and the upper end of the second counterweight guide rail 15. The second upper beam 26 is fixed to the first upper beam 25 and the upper end of the second car guide rail 13.

[0018] A car return wheel 27 is supported on the second upper beam 26. A counterweight return wheel 28 and a second cleat stopper 29 are supported on the first upper beam 25.

[0019] The suspension 19 has a first end 19a and a second end 19b. The first end 19a is connected to a first cleat 24. The second end 19b is connected to a second cleat 29.

[0020] In addition, the suspension body 19 is wound around the first car hoisting sheave 21, the second car hoisting sheave 22, the car return sheave 27, the drive sheave 32, the counterweight return sheave 28, and the counterweight hoisting sheave 23, in that order from the first end 19a, and reaches the second end 19b.

[0021] As described above, the elevator system of the first embodiment is a machine room-less elevator of the 2:1 roping system.

[0022] Fig. 2 is a side view showing the elevator hoist 30 of Fig. 1. The hoist main body 31 has a hoist motor 33, a shaft 34, a hoist brake 35, and a brake cover 40.

[0023] The hoist motor 33 rotates the shaft 34. A drive sheave 32 is fixed to the shaft 34. The drive sheave 32 rotates together with the shaft 34, centering around the shaft 34. In other words, the hoist motor 33 rotates the drive sheave 32 via the shaft 34.

[0024] The hoist brake 35 keeps the drive sheave 32 and the shaft 34 stationary. The hoist brake 35 also brakes the rotation of the drive sheave 32 and the shaft 34.

[0025] The brake cover 40 is attached to the end of the hoisting machine motor 33 opposite the drive sheave 32. The brake cover 40 also covers the hoisting machine brake 35 and prevents water from entering the hoisting machine brake 35. In other words, the brake cover 40 is a waterproof cover. In Figure 2, a portion of the brake cover 40 is cut away to show the internal configuration of the brake cover 40.

[0026] The hoisting machine brake 35 has a brake disc 36 as a brake rotor and a pair of clampers 37 as a brake main body. That is, the hoisting machine brake 35 of the first embodiment is a disc brake. In Fig. 2, one of the pair of clampers 37 is omitted.

[0027] The brake disc 36 is fixed to the end of the shaft 34 opposite to the drive sheave 32. The brake disc 36 rotates together with the shaft 34 around the shaft 34. A pair of clampers 37 grips the brake disc 36 to apply a braking force to the brake disc 36.

[0028] Fig. 3 is an enlarged side view showing a main part of Fig. 2. Fig. 4 is a front view showing the hoisting machine main body 31 of Fig. 3, as seen along the arrow IV of Fig. 3.

[0029] Although not shown in Fig. 2, the brake disc 36 has a fan structure. That is, when the brake disc 36 rotates, it generates an airflow from the outer circumferential surface to the outside, as indicated by the arrows in Fig. 3. Examples of the fan structure include a centrifugal fan structure and a sirocco fan structure. For example, the brake disc 36 has a plurality of blades 36a arranged radially.

[0030] The brake cover 40 includes a cover body 41 and a heat dissipation member 42, which are not shown in FIG.

[0031] The heat dissipation member 42 is fixed to the cover body 41 so as to close an opening provided in the cover body 41. The heat dissipation member 42 is also disposed in a position where it is exposed to the airflow generated by the rotation of the brake disc 36.

[0032] The heat dissipation member 42 is made of a material with a higher thermal conductivity than the material of the cover body 41. The heat dissipation member 42 is provided with a plurality of heat dissipation fins 42a. Each of the heat dissipation fins 42a protrudes outward from the brake cover 40.

[0033] In such an elevator hoist 30, the hoist brake 35 is covered by the brake cover 40. Therefore, even if water enters the pit 11a due to heavy rain, for example, the simple configuration can prevent water from entering the hoist brake 35.

[0034] Furthermore, the brake disc 36 generates an airflow from its outer circumferential surface outward as it rotates. Therefore, even if heat is generated from the pair of clampers 37, the hoisting machine motor 33, etc. during operation of the elevator hoisting machine 30, the temperature inside the brake cover 40 can be prevented from rising to a high temperature compared to natural convection. Moreover, because the brake disc 36 has a fan structure, there is no need to add a dedicated cooling fan.

[0035] Therefore, according to the elevator hoisting machine 30 of the first embodiment, with a simple configuration, it is possible to prevent water from entering the hoisting machine brake 35 and prevent the temperature inside the brake cover 40 from becoming too high.

[0036] In addition, the heat dissipation member 42 is disposed at a position where it is hit by the airflow generated by the rotation of the brake disc 36. This improves the heat dissipation properties of the brake cover 40, and more reliably prevents the inside of the brake cover 40 from becoming too hot.

[0037] In addition, a plurality of heat dissipation fins 42a are provided on the heat dissipation member 42. This increases the surface area of ​​the heat dissipation member 42, further improving the heat dissipation performance of the brake cover 40 and more reliably preventing the inside of the brake cover 40 from becoming too hot.

[0038] Two or more heat dissipation members 42 may be fixed to the cover body 41, and the number of heat dissipation members 42 is not particularly limited.

[0039] Additionally, a plurality of blades for generating airflow may be provided on the outer periphery of the brake disc 36 .

[0040] Moreover, the heat dissipation member 42 may be omitted, and for example, the entire cover body 41 may be made of a material with high thermal conductivity.

[0041] Embodiment 2 Next, Fig. 5 is a side view showing a main part of an elevator hoisting machine 30 according to embodiment 2. Fig. 6 is a front view showing the hoisting machine main body 31 of Fig. 5, as seen along arrow VI in Fig. 5. In Figs. 5 and 6, the configuration inside the brake cover 40 is shown by cutting away a part of the brake cover 40.

[0042] The brake cover 40 of the second embodiment has a cover body 41 and a disk-shaped lid member 43. The cover body 41 is provided with an intake port 41a as a vent and an exhaust port 41b as another vent.

[0043] The intake port 41a is provided in a position on the cover body 41 facing the end surface of the shaft 34. The exhaust port 41b is provided on the cover body 41 directly above the brake disc 36.

[0044] Lid member 43 is provided on cover body 41 so as to cover air intake port 41a. That is, air intake port 41a is covered by lid member 43. Lid member 43 is made of a porous material that allows air to pass through but prevents water from passing through.

[0045] An exhaust duct 44 passes through the exhaust port 41b. The exhaust duct 44 guides the airflow generated by the rotation of the brake disc 36 from inside the brake cover 40 to outside the brake cover 40.

[0046] The lower end of the exhaust duct 44 surrounds a portion of the brake disc 36 inside the brake cover 40. The upper end of the exhaust duct 44 protrudes to the outside of the brake cover 40. Water is prevented from entering the brake cover 40 between the inner peripheral surface of the exhaust port 41b and the outer peripheral surface of the exhaust duct 44.

[0047] A water intrusion prevention member 45 is provided at the upper end of the exhaust duct 44. The water intrusion prevention member 45 prevents water from passing into the exhaust duct 44 while allowing air to pass out of the exhaust duct 44.

[0048] The water ingress prevention member 45 is made of a porous material. The water ingress prevention member 45 may also be a check valve.

[0049] Other configurations in the second embodiment are the same as those in the first embodiment.

[0050] In such an elevator hoisting machine 30, an air intake 41a is provided in the cover main body 41. In addition, a lid member 43 is provided on the cover main body 41 so as to close the air intake 41a. This makes it possible to more reliably prevent the inside of the brake cover 40 from becoming too hot while suppressing water from entering the hoisting machine brake 35.

[0051] The brake cover 40 is also provided with an exhaust duct 44. The exhaust duct 44 is also provided with a water intrusion prevention member 45. This makes it possible to prevent water from infiltrating the hoisting machine brake 35, while improving the heat dissipation properties of the brake cover 40 and more reliably preventing the inside of the brake cover 40 from becoming too hot.

[0052] The water ingress prevention member 45 is made of a porous material or is a check valve. Therefore, with a simple configuration, it is possible to suppress water ingress into the hoisting machine brake 35 while improving the heat dissipation performance of the brake cover 40.

[0053] The exhaust duct 44 may be omitted, and a cover member 43 may be provided on the exhaust port 41b.

[0054] Furthermore, it is possible to appropriately combine the first embodiment with the second embodiment. For example, the cover body 41 of the first embodiment may be provided with the intake port 41a and the lid member 43.

[0055] In addition, in the first and second embodiments, the brake rotor may be a brake drum, that is, the hoist brake may be a drum brake.

[0056] The above describes in detail preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0057] Various aspects of the present disclosure are summarized below as appendices.

[0058] (Appendix 1) Drive sheave, a hoist motor that rotates the drive sheave; a hoisting machine brake having a brake rotor and a brake main body that applies a braking force to the brake rotor and that maintains the drive sheave in a stationary state; a brake cover that covers the hoist brake Equipped with The brake rotor has a fan structure that generates an airflow from the outer peripheral surface to the outside when the rotor rotates. (Appendix 2) The brake cover is The cover body, a heat dissipation member that is arranged in a position where it is hit by an airflow generated by the rotation of the brake rotor and that is made of a material with a higher thermal conductivity than the material that constitutes the cover body; 2. The elevator hoisting machine according to claim 1, (Appendix 3) 3. The elevator hoisting machine according to claim 2, wherein the heat dissipation member is provided with a plurality of heat dissipation fins. (Appendix 4) The brake cover is provided with a vent hole, The vent hole is covered with a cover member, An elevator hoisting machine according to any one of appendices 1 to 3, wherein the cover member is made of a porous material that allows air to pass through while preventing water from passing through. (Appendix 5) an exhaust duct that guides an airflow generated by rotation of the brake rotor from inside the brake cover to outside the brake cover; a water intrusion prevention member provided in the exhaust duct, which allows air to pass outside the exhaust duct while preventing water from passing into the exhaust duct; 5. The elevator hoisting machine according to any one of claims 1 to 4, further comprising: (Appendix 6) 6. An elevator hoist according to claim 5, wherein the water-blocking member is made of a porous material. (Appendix 7) 6. An elevator hoisting machine according to claim 5, wherein the water-blocking member is a check valve. (Appendix 8) An elevator system in which the elevator hoisting machine according to any one of appendixes 1 to 7 is installed in a pit of a hoistway. [Explanation of symbols]

[0059] 11 elevator shaft, 11a pit, 30 elevator hoist, 32 drive sheave, 33 hoist motor, 35 hoist brake, 36 brake disc (rotating body), 37 clamper (brake body), 40 brake cover, 41 cover body, 41a intake port (vent), 41b exhaust port (vent), 42 heat dissipation member, 43 cover member, 44 exhaust duct, 45 water ingress prevention member.

Claims

1. Drive sheave, a hoist motor that rotates the drive sheave; a hoisting machine brake having a brake rotor and a brake main body that applies a braking force to the brake rotor and that maintains the drive sheave in a stationary state; a brake cover that covers the hoist brake Equipped with The brake rotor has a fan structure that generates an airflow from the outer peripheral surface to the outside when the rotor rotates.

2. The brake cover is The cover body, a heat dissipation member that is arranged in a position where it is hit by an airflow generated by the rotation of the brake rotor and that is made of a material with a higher thermal conductivity than the material that constitutes the cover body; 2. The elevator machine according to claim 1, further comprising:

3. 3. The elevator hoisting machine according to claim 2, wherein the heat dissipating member is provided with a plurality of heat dissipating fins.

4. The brake cover is provided with a vent hole, The vent hole is covered with a cover member, 4. The elevator hoisting machine according to claim 1, wherein the cover member is made of a porous material that allows air to pass through but prevents water from passing through.

5. an exhaust duct that guides an airflow generated by rotation of the brake rotor from inside the brake cover to outside the brake cover; a water intrusion prevention member provided in the exhaust duct, which allows air to pass outside the exhaust duct while preventing water from passing into the exhaust duct; The elevator hoisting machine according to any one of claims 1 to 3, further comprising:

6. 6. The elevator hoisting machine according to claim 5, wherein the water ingress prevention member is made of a porous material.

7. 6. The elevator hoisting machine according to claim 5, wherein the water ingress prevention member is a check valve.

8. An elevator system in which the elevator hoisting machine according to any one of claims 1 to 3 is installed in a pit of a hoistway.

Images