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 cover main part 41 may rotate relative to a hoist motor 33 between a normal position and a sealed position. The sealed position is a position where a space surrounding a hoist brake 35 is sealed by the cover main part 41 to inhibit the hoist brake 35 from being immersed in water. The normal position is a position where an upper part of the space surrounding the hoist brake 35 is open to the outside of a brake cover 40. The cover body 41 is configured to be automatically rotated from the normal position to the sealed position by a buoyant force during flooding.SELECTED DRAWING: Figure 4

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 temperature inside the brake cover from rising too high. [Means for solving the problem]

[0007] The elevator hoist of the present disclosure has a drive sheave, a hoist motor that rotates the drive sheave, a brake rotor, and a brake main 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 space around the hoist brake, and the brake cover has a cover main body that can rotate relative to the hoist motor between a normal position and a sealed position, the sealed position is a position that seals the space around the hoist brake and prevents water from entering the hoist brake, and the normal position is a position that opens the upper part of the space around the hoist brake, and the cover main body is configured to rotate from the normal position to the sealed position by buoyancy when flooded. In addition, 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 main 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 space around the hoist brake, and the brake cover has a cover main body with an air vent, and a lid member that is attached to the cover main body and can be displaced between a normal position that opens the air vent and a sealed position that closes the air vent and seals the space around the hoist brake, and the lid member is configured to be displaced from the normal position to the sealed position by buoyancy when flooded. [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 a front view showing the hoisting machine body of FIG. 2. [Figure 4] FIG. 3 is a side view showing the brake cover of FIG. 2 in a normal state. [Figure 5] 5 is a side view showing the state of the brake cover when the pit in FIG. 4 is flooded. FIG. [Figure 6] FIG. 6 is a side view showing the state in which the water level in FIG. 5 has risen. [Figure 7] FIG. 10 is a side view showing a main part of an elevator hoisting machine according to a second embodiment. [Figure 8] FIG. 8 is a side view showing the state of the elevator hoisting machine when the pit in FIG. 7 is flooded. [Figure 9] FIG. 8 is a front view showing the hoisting machine body of FIG. 7. [Figure 10] FIG. 10 is a side view showing a modified example of the cover member of the second embodiment. 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. Fig. 3 is a front view showing the hoist main body 31 of Fig. 2, as seen along arrow III in Fig. 2. 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 hoist machine motor 33 opposite the drive sheave 32. The brake cover 40 also covers the space around the hoist machine brake 35, thereby preventing water from entering the hoist machine brake 35. In other words, the brake cover 40 is a waterproof cover. In Figure 2, part 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. 4 is a side view showing the brake cover 40 in Fig. 2 in a normal state. Fig. 5 is a side view showing the brake cover 40 when the pit 11a in Fig. 4 is flooded. Fig. 6 is a side view showing the state in Fig. 5 when the water level has risen. The hatched areas in Fig. 5 and Fig. 6 represent water.

[0029] The brake cover 40 has a cover body 41, a hinge 42, and a pair of left and right blocking members 43. In Figures 4 and 5, only one of the pair of left and right blocking members 43 is visible.

[0030] The cover body 41 is rotatably connected to the hoist motor 33 via a hinge 42 around a horizontal rotation axis. The hinge 42 is provided at the lower end of the cover body 41. This allows the cover body 41 to rotate relative to the hoist motor 33 between the normal position shown in FIG. 4 and the closed position shown in FIG. 6.

[0031] The sealed position is a position in which the cover body 41 seals the space around the hoisting machine brake 35 and prevents water from entering the hoisting machine brake 35.

[0032] The normal position is a position where the upper part of the space around the hoist brake 35 is open to the outside of the brake cover 40. When the cover body 41 is located in the normal position, an opening 40a is provided between the upper end of the cover body 41 and the hoist motor 33.

[0033] The cover body 41 is designed to automatically rotate from the normal position to the sealed position due to buoyancy when flooded. Specifically, when the water level in the pit 11a rises due to flooding, if the buoyancy is greater than the weight of the cover body 41 at the center of gravity with the hinge 42 as the fulcrum, the cover body 41 will automatically rotate in a direction that brings it into close contact with the hoist motor 33 as the water level rises.

[0034] When the cover body 41 is in the normal position, each blocking member 43 blocks the gap between the side surface of the cover body 41 and the hoist motor 33. Each blocking member 43 is a flexible sheet-like member. As a result, each blocking member 43 is folded when the cover body 41 moves to the sealed position, and does not prevent the cover body 41 from sealing the space around the hoist brake 35.

[0035] The cover body 41 has a case-shaped main portion 41a and a protruding portion 41b. The main portion 41a is a portion that covers the space around the hoist brake 35. The protruding portion 41b protrudes from the lower end of the end of the main portion 41a on the side opposite the hoist motor 33 to the side opposite the hoist motor 33.

[0036] The protrusion 41b is displaced vertically as the cover body 41 rotates between the normal position and the sealed position. When the cover body 41 is in the normal position, the tip of the protrusion 41b contacts the floor of the pit 11a. When the pit 11a is flooded, the protrusion 41b is displaced upward due to buoyancy.

[0037] In such an elevator hoist 30, the cover body 41 is located in the normal position during normal operation of the elevator system. When the cover body 41 is located in the normal position, the upper part of the space around the hoist brake 35 is open to the outside through the opening 40a. In other words, the hoist brake 35 is exposed to the outside of the brake cover 40.

[0038] Therefore, even if heat is generated from the pair of clampers 37, the hoist motor 33, etc. during operation of the elevator hoist 30, the heat will not be trapped inside the brake cover 40, and the temperature inside the brake cover 40 can be prevented from becoming too high.

[0039] Furthermore, if water enters the pit 11a due to heavy rain, for example, as the water level rises, the cover body 41 rotates to the sealed position due to the buoyancy of the water. Therefore, with a simple configuration, it is possible to prevent water from entering the hoisting machine brake 35.

[0040] 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.

[0041] Furthermore, the cover body 41 is rotatably connected to the hoist motor 33 via a hinge 42. Therefore, with a simple configuration, the cover body 41 can be rotated between the normal position and the closed position.

[0042] Furthermore, a protrusion 41b is provided on the cover body 41. This allows the cover body 41 to be quickly rotated to the closed position by buoyancy when submerged in water, without increasing the overall size of the cover body 41.

[0043] In addition, the brake cover 40 has a pair of blocking members 43. Therefore, with a simple configuration, it is possible to more reliably prevent water from entering the hoisting machine brake 35.

[0044] A magnet may be provided between the cover body 41 and the hoist motor 33. This increases the degree of contact between the cover body 41 and the hoist motor 33 when the cover body 41 is rotated to the sealed position, and more reliably prevents water from entering the hoist brake 35.

[0045] Furthermore, a seal member may be provided between the cover body 41 and the hoist motor 33. This also increases the degree of adhesion between the cover body 41 and the hoist motor 33 when the cover body 41 is rotated to the sealed position, and more reliably prevents water from entering the hoist brake 35.

[0046] Embodiment 2 Next, Fig. 7 is a side view showing a main part of an elevator hoisting machine 30 according to a second embodiment. Fig. 8 is a side view showing the state of the elevator hoisting machine 30 when the pit 11a in Fig. 7 is flooded. The hatched area in Fig. 8 represents water. Fig. 9 is a front view showing the hoisting machine main body 31 in Fig. 7.

[0047] The hoist body 31 of the second embodiment has a hoist motor 33, a shaft 34, a hoist brake 35, and a brake cover 50. The configuration of the second embodiment other than the brake cover 50 is the same as that of the first embodiment.

[0048] The brake cover 50 has a case-shaped cover body 51, a pair of flat plate-shaped lid members 52, and a plurality of blocking members 53. The cover body 51 covers the space around the hoist machine brake 35. A pair of ventilation holes 51a are provided on the end face of the cover body 51 opposite to the hoist machine motor 33.

[0049] Each lid member 52 is attached to the cover body 41 via a hinge (not shown) so as to be rotatable about a horizontal rotation axis. The hinge is provided at the lower end of the lid member 52. Furthermore, each lid member 52 can be displaced between a normal position shown in FIG. 7 and a closed position shown in FIG. 8 by rotating relative to the cover body 41.

[0050] The normal position is a position where the corresponding vent hole 51 a is open, and the closed position is a position where the corresponding vent hole 51 a is closed to seal the space around the hoisting machine brake 35.

[0051] When submerged in water, each cover member 52 is designed to automatically rotate from the normal position to the closed position due to buoyancy.

[0052] Each blocking member 53 blocks the gap between the side surface of the corresponding lid member 52 and the cover body 51 when the lid member 52 is in the normal position. Each blocking member 53 is a flexible sheet-like member. As a result, each blocking member 53 is folded when the lid member 52 moves to the sealed position, and does not prevent the lid member 52 from moving to the sealed position.

[0053] When each of the cover members 52 is in the normal position, a pair of openings 50a is provided between the upper ends of the pair of cover members 52 and the cover body 51.

[0054] One of the pair of ventilation holes 51a is an intake port. The other of the pair of ventilation holes 51a is an exhaust port. An intake fan 54 is provided inside the intake port in the cover main body 51. An exhaust fan 55 is provided inside the exhaust port in the cover main body 51.

[0055] In such an elevator hoisting machine 30, each cover member 52 is positioned in a normal position during normal operation of the elevator system. When each cover member 52 is positioned in a normal position, the space around the hoisting machine brake 35 is open to the outside through the pair of vent holes 51a and the pair of openings 50a.

[0056] Therefore, even if heat is generated from the pair of clampers 37, the hoist motor 33, etc. during operation of the elevator hoist 30, the heat does not build up inside the brake cover 50, and the temperature inside the brake cover 50 can be prevented from becoming too high.

[0057] Furthermore, if water enters the pit 11a due to heavy rain, for example, as the water level rises, the buoyancy of the water causes each of the cover members 52 to rotate to the sealed position. Therefore, with a simple configuration, it is possible to prevent water from entering the hoisting machine brake 35.

[0058] Therefore, according to the elevator hoisting machine 30 of the second 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 50 from becoming too high.

[0059] The brake cover 50 is also provided with an intake fan 54 and an exhaust fan 55. Therefore, when the cover body 51 is in the normal position, the intake fan 54 and the exhaust fan 55 can be driven to actively exhaust air from inside the brake cover 50. This more reliably prevents the inside of the brake cover 50 from becoming too hot.

[0060] In the second embodiment, the number of vent holes 51a may be one or three or more, and accordingly, the number of cover members 52 may also be one or three or more.

[0061] Furthermore, in the second embodiment, the shape of the cover member 52 is not limited to a flat plate, and for example, it may be provided with a protrusion like the protrusion 41b in the first embodiment, or may be in a case shape as shown in FIG.

[0062] In the second embodiment, either the intake fan 54 or the exhaust fan 55 may be omitted.

[0063] In the second embodiment, both the intake fan 54 and the exhaust fan 55 may be omitted.

[0064] Furthermore, a magnet may be provided between each cover member 52 and the cover body 51. This increases the degree of contact between each cover member 52 and the cover body 51 when each cover member 52 is rotated to the sealed position, and more reliably prevents water from entering the hoisting machine brake 35.

[0065] Furthermore, a sealing member may be provided between each cover member 52 and the cover body 51. This also increases the degree of adhesion between each cover member 52 and the cover body 51 when each cover member 52 is rotated to the sealed position, and more reliably prevents water from entering the hoisting machine brake 35.

[0066] In addition, in the second embodiment, each cover member 52 is rotatable between the normal position and the sealed position. However, each cover member 52 may be slidable between the normal position and the sealed position.

[0067] Furthermore, the first embodiment and the second embodiment may be combined as appropriate. For example, the cover body 41 of the first embodiment may be provided with the ventilation hole 51a and the lid member 52. In this case, a fan may be provided inside the ventilation hole 51a.

[0068] 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.

[0069] 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.

[0070] Various aspects of the present disclosure are summarized below as appendices.

[0071] (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 space around the hoist brake Equipped with The brake cover is A cover body rotatable relative to the hoist motor between a normal position and a closed position It has the sealed position is a position that seals a space around the hoisting machine brake and prevents water from entering the hoisting machine brake, the normal position is a position that opens an upper portion of a space around the hoisting machine brake, The elevator hoist is configured so that the cover body rotates from the normal position to the sealed position by buoyancy when the elevator is submerged. (Appendix 2) The brake cover is A hinge provided at the lower end of the cover body and 2. The elevator hoist according to claim 1, wherein the cover body is rotatably connected to the hoist motor via the hinge. (Appendix 3) The cover body is a main portion that covers a space around the hoisting machine brake; a protruding portion protruding from a lower end of the end of the main portion opposite to the hoisting machine motor; 3. The elevator hoisting machine according to claim 1 or 2, (Appendix 4) The brake cover is a closing member that closes a gap between a side surface of the cover body and the hoist motor when the cover body is located at the normal position; 4. The elevator hoisting machine according to any one of claims 1 to 3, further comprising: (Appendix 5) 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 space around the hoist brake Equipped with The brake cover is a cover body provided with a ventilation hole; a lid member provided on the cover body so as to be displaceable between a normal position in which the vent hole is opened and a sealed position in which the vent hole is closed to seal the space around the hoisting machine brake; It has The elevator hoist is configured so that the cover member is displaced from the normal position to the closed position by buoyancy when the elevator is flooded. (Appendix 6) a fan provided inside the vent hole in the cover body; 6. The elevator hoisting machine according to claim 5, further comprising: (Appendix 7) An elevator system in which the elevator hoisting machine according to any one of appendixes 1 to 6 is installed in a pit of a hoistway. [Explanation of symbols]

[0072] 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, 50 brake cover, 41, 51 cover body, 41a main part, 41b protrusion, 42 hinge, 43 closing member, 51a ventilation hole, 52 cover member, 54 intake fan, 55 exhaust fan.

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 space around the hoist brake Equipped with The brake cover is A cover body rotatable relative to the hoist motor between a normal position and a closed position It has the sealed position is a position that seals a space around the hoisting machine brake and prevents water from entering the hoisting machine brake, the normal position is a position that opens an upper portion of a space around the hoisting machine brake, The elevator hoist is configured so that the cover body rotates from the normal position to the sealed position by buoyancy when the elevator is submerged.

2. The brake cover is A hinge provided at the lower end of the cover body and The elevator hoist according to claim 1, wherein the cover body is rotatably connected to the hoist motor via the hinge.

3. The cover body is a main portion that covers a space around the hoisting machine brake; a protruding portion protruding from a lower end of the end of the main portion opposite to the hoisting machine motor; 3. The elevator hoisting machine according to claim 1 or 2, further comprising:

4. The brake cover is a closing member that closes a gap between a side surface of the cover body and the hoist motor when the cover body is located at the normal position; 3. The elevator hoisting machine according to claim 1 or 2, further comprising:

5. 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 space around the hoist brake Equipped with The brake cover is a cover body provided with a ventilation hole; a lid member provided on the cover body so as to be displaceable between a normal position in which the vent hole is opened and a sealed position in which the vent hole is closed to seal the space around the hoisting machine brake; It has The elevator hoist is configured so that the cover member is displaced from the normal position to the closed position by buoyancy when the elevator is flooded.

6. a fan provided inside the vent hole in the cover body; 6. The elevator machine of claim 5, further comprising:

7. An elevator system in which the elevator hoisting machine according to any one of claims 1 to 6 is installed in a pit of a hoistway.

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