Elevator traction machine and elevator device

Abstract

The invention provides an elevator traction machine and an elevator device, which can restrain water immersion of a traction machine brake through a simple structure and restrain high temperature in a brake cover. The cover body (41) is rotatable relative to the hoist motor (33) between a normal position and a closed position. The sealing position is a position where the space around the hoist brake (35) is sealed by the cover main body (41) and water immersion of the hoist brake (35) is suppressed. The normal position is a position where the upper part of the space around the hoist brake (35) is opened to the outside of the brake cover (40). When the cover body (41) is flooded, the cover body (41) automatically rotates from a normal position to a closed position by buoyancy.

Description

Technical Field

[0001] The present disclosure relates to an elevator hoisting machine and an elevator device. Background Art

[0002] In conventional elevators, vertical columns are installed in the pit of the hoistway. A traction machine is fixed to a base. A moving device is installed on the base. The base can be raised along the vertical columns by the moving device. The moving device raises the base when the pit is flooded (see, for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2000-247557 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] In the conventional elevator as described above, in order to raise the traction machine as a heavy load, it is necessary to install vertical columns, a base, a moving device, etc. having sufficient strength in the pit, resulting in a large structure.

[0008] On the other hand, if the hoisting machine brake is covered with a cover in order to suppress water ingress to the hoisting machine brake, heat generated by energization of the hoisting machine brake is accumulated in the cover, and the hoisting machine brake may be exposed to high temperature.

[0009] The present disclosure has been made to solve the above-mentioned problems, and an object thereof is to provide an elevator hoisting machine and an elevator apparatus capable of suppressing water intrusion into a hoisting machine brake and suppressing high temperature inside a brake cover with a simple structure.

[0010] Means for solving problems

[0011] The elevator hoisting machine disclosed in the present invention comprises: a driving sheave; a hoisting machine motor, which rotates the driving sheave; a hoisting machine brake, which has a brake rotor and a brake body that applies braking force to the brake rotor, and the hoisting machine brake maintains a stationary state of the driving sheave; and a brake cover, which covers the space around the hoisting machine brake, the brake cover having a cover body that can rotate relative to the hoisting machine motor between a normal position and a closed position, the closed position is a position in which the space around the hoisting machine brake is sealed to suppress water immersion in the hoisting machine brake, and the normal position is a position in which the upper part of the space around the traction machine brake is open, and the cover body rotates from the normal position to the closed position by buoyancy when flooded.

[0012] In addition, the elevator traction machine disclosed in the present invention includes: a driving sheave; a traction machine motor, which rotates the driving sheave; a traction machine brake, which has a brake rotor and a brake body that applies braking force to the brake rotor, and the traction machine brake maintains the driving sheave in a stationary state; and a brake cover, which covers the space around the traction machine brake, the brake cover has: a cover body, which is provided with a vent; and a cover member, which is provided on the cover body in a manner capable of shifting between a normal position and a closed position, the normal position is a position in which the vent is open, and the closed position is a position in which the vent is closed and the space around the traction machine brake is sealed, and the cover member shifts from the normal position to the closed position by buoyancy when flooded.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to suppress water intrusion into the hoisting machine brake and to suppress the temperature inside the brake cover from becoming high with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a perspective view showing the elevator apparatus according to the first embodiment.

[0016] Figure 2 Yes Figure 1 Side view of an elevator traction machine.

[0017] Figure 3 Yes Figure 2 The main view of the traction machine body.

[0018] Figure 4 Yes Figure 2 A side view of the brake cover in a normal state.

[0019] Figure 5 Yes Figure 4 A side view of the brake cover when the pit is flooded.

[0020] Figure 6 Yes Figure 5 A side view of a state where the water level rises.

[0021] Figure 7 It is a side view showing the main part of the elevator hoisting machine according to the second embodiment.

[0022] Figure 8 Yes Figure 7 A side view of the elevator traction machine when the pit is flooded.

[0023] Figure 9 Yes Figure 7 The main view of the traction machine body.

[0024] Figure 10This is a side view showing a modified example of the cover member according to the second embodiment.

[0025] Description of labels

[0026] 11: Hoistway, 11a: Pit, 30: Elevator hoist, 32: Drive sheave, 33: Hoist motor, 35: Hoist brake, 36: Brake disc (rotating body), 37: Clamp (brake body), 40, 50: Brake cover, 41, 51: Cover body, 41a: Main part, 41b: Protrusion, 42: Hinge, 43: Blocking part, 51a: Vent, 52: Cover part, 54: Intake fan, 55: Exhaust fan. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments will be described with reference to the drawings.

[0028] Implementation method 1.

[0029] Figure 1 This 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 provided in a hoistway 11 .

[0030] 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 upward and downward in the hoistway 11.

[0031] 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 raised and lowered in the hoistway 11.

[0032] A machine base 18 is provided in the pit 11a of the hoistway 11. An elevator hoisting machine 30 is provided on the machine base 18. That is, the elevator hoisting machine 30 is provided in the pit 11a of the hoistway 11. The elevator hoisting machine 30 includes a hoisting machine body 31 and a drive sheave 32.

[0033] The suspension body 19 is wound around the driving sheave 32. As the suspension body 19, a plurality of ropes or a plurality of belts are used.

[0034] The car 16 and the counterweight 17 are suspended in the hoistway 11 by a suspension body 19. The car 16 and the counterweight 17 are moved up and down in the hoistway 11 by the rotation of the drive sheave 32.

[0035] A first car suspension pulley 21 and a second car suspension pulley 22 are provided at the lower portion of the car 16. A counterweight suspension pulley 23 is provided at the upper portion of the counterweight 17.

[0036] A first rope end fastener 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 upper end of the first upper beam 25 and the second car guide rail 13.

[0037] The second upper beam 26 supports a car return pulley 27. The first upper beam 25 supports a counterweight return pulley 28 and a second rope end fastener 29.

[0038] The suspension body 19 has a first end 19a and a second end 19b. The first end 19a is connected to the first rope end fastener 24 and the second end 19b is connected to the second rope end fastener 29.

[0039] The suspension body 19 is sequentially wound around the first car suspending sheave 21, the second car suspending sheave 22, the car return sheave 27, the drive sheave 32, the counterweight return sheave 28, and the counterweight suspending sheave 23 from the first end 19a side to reach the second end 19b.

[0040] As described above, the elevator apparatus according to the first embodiment is a machine-room-less elevator of the 2:1 roping system.

[0041] Figure 2 Yes Figure 1 30 is a side view of an elevator traction machine. Figure 3 Yes Figure 2 The main view of the traction machine body 31 is along Figure 2 The hoisting machine body 31 includes a hoisting machine motor 33 , a shaft 34 , a hoisting machine brake 35 , and a brake cover 40 .

[0042] The hoisting machine motor 33 rotates the shaft 34. The drive sheave 32 is fixed to the shaft 34. The drive sheave 32 rotates together with the shaft 34 about the shaft 34. That is, the hoisting machine motor 33 rotates the drive sheave 32 via the shaft 34.

[0043] The hoisting machine brake 35 keeps the drive sheave 32 and the shaft 34 stationary. In addition, the hoisting machine brake 35 brakes the rotation of the drive sheave 32 and the shaft 34.

[0044] The brake cover 40 is attached to the end of the hoisting machine motor 33 on the side opposite to the drive sheave 32. In addition, the brake cover 40 covers the space around the hoisting machine brake 35, thereby preventing the hoisting machine brake 35 from being immersed in water. In other words, the brake cover 40 is a waterproof cover. Figure 2 In FIG. 1 , a portion of the brake cover 40 is cut away to show the structure inside the brake cover 40 .

[0045] The hoisting machine brake 35 includes a brake disc 36 as a brake rotor and a pair of clamps 37 as a brake body. That is, the hoisting machine brake 35 of the first embodiment is a disc brake. Figure 2 In the embodiment, one of the pair of clampers 37 is omitted.

[0046] The brake disc 36 is fixed to the end portion of the shaft 34 on the opposite side from the drive sheave 32. The brake disc 36 rotates together with the shaft 34 about the shaft 34. The pair of clampers 37 applies a braking force to the brake disc 36 by gripping the brake disc 36.

[0047] Figure 4 Yes Figure 2 1 is a side view of the brake cover 40 in a normal state. Figure 5 Yes Figure 4 A side view of the brake cover 40 when the pit 11a is flooded. Figure 6 Yes Figure 5 A side view of a state where the water level rises. Figure 5 and Figure 6 The slashed part represents water.

[0048] The brake cover 40 includes a cover body 41, a hinge 42, and a pair of left and right blocking members 43. Figure 4 and Figure 5 In the figure, only one of the pair of left and right blocking members 43 can be seen.

[0049] The cover body 41 is connected to the traction machine motor 33 via a hinge 42 so as to be rotatable around a horizontal rotation axis. The hinge 42 is provided at the lower end of the cover body 41. Figure 4 The usual position shown is Figure 6 The closed positions shown rotate relative to the hoisting machine motor 33.

[0050] The sealed position is a position where the space around the hoisting machine brake 35 is sealed by the cover body 41 to suppress water intrusion into the hoisting machine brake 35 .

[0051] The normal position is a position where the upper portion of the space around the hoisting machine brake 35 is open to the outside of the brake cover 40. When the cover body 41 is in the normal position, an opening 40a is provided between the upper end of the cover body 41 and the hoisting machine motor 33.

[0052] When flooded, the cover body 41 automatically rotates from its normal position to its sealed position due to buoyancy. Specifically, if the water level in the pit 11a rises due to flooding, and if the buoyancy exceeds the weight of the cover body 41 at its center of gravity, with the hinge 42 as the fulcrum, the cover body 41 automatically rotates toward close contact with the hoisting machine motor 33 as the water level rises.

[0053] 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 hoisting machine motor 33. Furthermore, each blocking member 43 is a flexible, sheet-like member. Thus, when the cover body 41 moves to the sealed position, each blocking member 43 folds, thereby preventing the cover body 41 from sealing the space around the hoisting machine brake 35.

[0054] The cover body 41 includes a box-shaped main portion 41a and a protruding portion 41b. The main portion 41a covers the space around the hoisting machine brake 35. The protruding portion 41b protrudes from the lower end of the main portion 41a on the side opposite to the hoisting machine motor 33 toward the side opposite to the hoisting machine motor 33.

[0055] As the cover body 41 rotates between the normal position and the sealed position, the protrusion 41b shifts vertically. When the cover body 41 is in the normal position, the distal end of the protrusion 41b contacts the floor of the pit 11a. Furthermore, when the pit 11a is flooded, the protrusion 41b is displaced upward by buoyancy.

[0056] In such an elevator hoisting machine 30, during normal operation of the elevator apparatus, the cover body 41 is in its normal position. Furthermore, when the cover body 41 is in its normal position, the upper portion of the space surrounding the hoisting machine brake 35 is open to the outside through the opening 40a. In other words, the hoisting machine brake 35 is exposed to the outside of the brake cover 40.

[0057] Therefore, even when heat is generated from the pair of clamps 37, the hoisting machine motor 33, etc. as the elevator hoisting machine 30 operates, the heat is not accumulated in the brake cover 40, and the temperature inside the brake cover 40 can be suppressed from rising.

[0058] Furthermore, when water enters the pit 11a due to heavy rain, for example, the cover body 41 rotates toward the sealed position due to buoyancy from the water as the water level rises.

[0059] Therefore, according to the elevator hoisting machine 30 of Embodiment 1, it is possible to suppress water infiltration of the hoisting machine brake 35 with a simple structure and to suppress the temperature inside the brake cover 40 from becoming high.

[0060] Moreover, the cover main body 41 is rotatably connected to the hoisting machine motor 33 via the hinge 42. Therefore, the cover main body 41 can be rotated between the normal position and the sealed position with a simple structure.

[0061] Furthermore, the protrusion 41b is provided on the cover body 41. Therefore, the cover body 41 can be quickly rotated toward the sealed position by utilizing buoyancy when flooded without increasing the size of the entire cover body 41.

[0062] In addition, the brake cover 40 includes a pair of blocking members 43. Therefore, the hoisting machine brake 35 can be more reliably suppressed from being flooded with water with a simple structure.

[0063] Alternatively, a magnet may be provided between the cover body 41 and the hoisting machine motor 33. This improves the close contact between the cover body 41 and the hoisting machine motor 33 when the cover body 41 is rotated to the sealed position, and more reliably prevents the hoisting machine brake 35 from being flooded.

[0064] Furthermore, a sealing member may be provided between the cover body 41 and the hoisting machine motor 33. This can improve the close contact between the cover body 41 and the hoisting machine motor 33 when the cover body 41 is rotated to the sealed position, and can more reliably prevent the hoisting machine brake 35 from being flooded.

[0065] Implementation method 2.

[0066] then, Figure 7 It is a side view showing the main part of the elevator hoisting machine 30 according to the second embodiment. Figure 8 Yes Figure 7 1 is a side view of the elevator hoisting machine 30 when the pit 11a is flooded. Figure 8 The slashed part represents water. Figure 9 Yes Figure 7 A front view of the traction machine body 31.

[0067] The hoisting machine body 31 of the second embodiment includes a hoisting machine motor 33, a shaft 34, a hoisting machine brake 35, and a brake cover 50. The structure other than the brake cover 50 in the second embodiment is the same as that of the first embodiment.

[0068] The brake cover 50 includes a box-shaped cover body 51, a pair of flat-plate cover members 52, and a plurality of blocking members 53. The cover body 51 covers the space surrounding the hoisting machine brake 35. A pair of vents 51a are provided on the end surface of the cover body 51 opposite to the hoisting machine motor 33.

[0069] Each cover member 52 is mounted on 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 cover member 52. In addition, each cover member 52 can be rotated relative to the cover body 41. Figure 7 The usual position shown is Figure 8 Shift between the enclosed positions shown.

[0070] The normal position is a position where the corresponding vent 51a is opened, and the sealed position is a position where the corresponding vent 51a is closed to seal the space around the hoisting machine brake 35.

[0071] When flooded, each cover member 52 automatically rotates from the normal position to the sealed position by buoyancy.

[0072] When the corresponding cover member 52 is in the normal position, each blocking member 53 blocks the gap between the side surface of the cover member 52 and the cover body 51. Furthermore, each blocking member 53 is a flexible sheet-like member. Thus, each blocking member 53 folds when the cover member 52 moves toward the sealed position, thereby not hindering the cover member 52 from moving toward the sealed position.

[0073] When the cover members 52 are located at the normal position, a pair of openings 50 a are provided between the upper ends of the pair of cover members 52 and the cover body 51 .

[0074] One of the pair of vents 51a is an air intake port. The other of the pair of vents 51a is an air exhaust port. An air intake fan 54 is provided inside the air intake port of the cover body 51. An air exhaust fan 55 is provided inside the air exhaust port of the cover body 51.

[0075] In such an elevator hoisting machine 30, during normal operation of the elevator apparatus, each cover member 52 is in a normal position. Furthermore, when each cover member 52 is in a normal position, the space around the hoisting machine brake 35 is open to the outside through the pair of vents 51a and the pair of openings 50a.

[0076] Therefore, even when heat is generated from the pair of clamps 37, the hoisting machine motor 33, etc. as the elevator hoisting machine 30 operates, the heat is not accumulated in the brake cover 50, and the temperature inside the brake cover 50 can be suppressed from rising.

[0077] Furthermore, when water enters the pit 11a due to heavy rain, for example, as the water level rises, the cover members 52 rotate to the sealed position due to the buoyancy of the water.

[0078] Therefore, according to the elevator hoisting machine 30 of the second embodiment, it is possible to suppress water intrusion into the hoisting machine brake 35 with a simple structure and to suppress the temperature inside the brake cover 50 from becoming high.

[0079] Furthermore, the brake cover 50 is 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 are driven to actively exhaust the inside of the brake cover 50. This can more reliably prevent the inside of the brake cover 50 from becoming hot.

[0080] In the second embodiment, the number of the vent 51a may be one or three or more. Accordingly, the number of the cover member 52 may be one or three or more.

[0081] In the second embodiment, the shape of the cover member 52 is not limited to a flat plate. For example, a protrusion such as the protrusion 41b of the first embodiment may be provided, or a protrusion may be provided. Figure 10 Box shape as shown.

[0082] In the second embodiment, either the intake fan 54 or the exhaust fan 55 may be omitted.

[0083] In addition, in the second embodiment, both the intake fan 54 and the exhaust fan 55 may be omitted.

[0084] Furthermore, a magnet may be provided between each cover member 52 and the cover body 51. This can improve the close contact between each cover member 52 and the cover body 51 when each cover member 52 is rotated to the sealed position, and can more reliably prevent the hoisting machine brake 35 from being flooded.

[0085] Furthermore, a sealing member may be provided between each cover member 52 and the cover body 51. This can improve the close contact between each cover member 52 and the cover body 51 when each cover member 52 is rotated to the sealed position, and can more reliably prevent the hoisting machine brake 35 from being flooded.

[0086] In addition, in Embodiment 2, 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.

[0087] Furthermore, Embodiment 1 and Embodiment 2 may be combined as appropriate. For example, the cover body 41 of Embodiment 1 may be provided with the vent 51a and the cover member 52. In this case, a fan may be provided inside the vent 51a.

[0088] Furthermore, in the first and second embodiments, the brake rotor may be a brake drum. In other words, the hoisting machine brake may be a drum brake.

[0089] Although preferred embodiments and the like have been described in detail above, the present invention is not limited to the above-described embodiments and the like, and various modifications and substitutions can be made to the above-described embodiments and the like without departing from the scope described in the claims.

[0090] Hereinafter, various aspects of the present disclosure are collectively described as supplementary notes.

[0091] (Note 1)

[0092] An elevator traction machine, comprising:

[0093] drive sheave;

[0094] a traction machine motor that rotates the drive sheave;

[0095] a hoisting machine brake having a brake rotor and a brake body for applying a braking force to the brake rotor, wherein the hoisting machine brake maintains the driving sheave in a stationary state; and

[0096] a brake cover that covers the space around the traction machine brake,

[0097] The brake cover has a cover body that is rotatable relative to the hoisting machine motor between a normal position and a closed position.

[0098] The sealed position is a position where the space around the hoisting machine brake is sealed to prevent the hoisting machine brake from being flooded.

[0099] The normal position is a position where the upper portion of the space around the hoisting machine brake is opened.

[0100] The cover body rotates from the normal position to the sealed position by buoyancy when flooded.

[0101] (Note 2)

[0102] The elevator traction machine according to Supplementary Note 1, wherein:

[0103] The brake cover further includes a hinge provided at the lower end portion of the cover body.

[0104] The cover body is rotatably connected to the hoisting machine motor via the hinge.

[0105] (Note 3)

[0106] The elevator traction machine according to Supplementary Note 1 or 2, wherein:

[0107] The cover body has:

[0108] a main portion covering a space surrounding the traction machine brake; and

[0109] A protrusion protrudes from a lower end of the main portion on the side opposite to the hoisting machine motor.

[0110] (Note 4)

[0111] The elevator traction machine according to any one of Supplementary Notes 1 to 3, wherein:

[0112] The brake cover further includes a blocking member configured to block a gap between a side surface of the cover body and the hoisting machine motor when the cover body is located at the normal position.

[0113] (Note 5)

[0114] An elevator traction machine, comprising:

[0115] drive sheave;

[0116] a traction machine motor that rotates the drive sheave;

[0117] a hoisting machine brake having a brake rotor and a brake body for applying a braking force to the brake rotor, wherein the hoisting machine brake maintains the driving sheave in a stationary state; and

[0118] a brake cover that covers the space around the traction machine brake,

[0119] The brake cover has:

[0120] a cover body provided with a vent; and

[0121] a cover member disposed on the cover body so as to be displaceable between a normal position in which the vent is opened and a sealed position in which the vent is closed to seal the space around the hoisting machine brake;

[0122] The cover member is displaced from the normal position to the sealed position by buoyancy when flooded.

[0123] (Note 6)

[0124] The elevator traction machine according to Supplementary Note 5, wherein:

[0125] The elevator hoisting machine further includes a fan provided inside the ventilating opening of the cover body.

[0126] (Note 7)

[0127] An elevator device, wherein the elevator traction machine according to any one of Supplementary Notes 1 to 6 is installed in a pit of a hoistway.

Claims

1. An elevator traction machine comprising: drive sheave; a traction machine motor that rotates the drive sheave; a hoisting machine brake having a brake rotor and a brake body for applying a braking force to the brake rotor, wherein the hoisting machine brake maintains the driving sheave in a stationary state; and a brake cover that covers the space around the traction machine brake, The brake cover has a cover body that is rotatable relative to the hoisting machine motor between a normal position and a closed position. The sealed position is a position where the space around the hoisting machine brake is sealed to prevent the hoisting machine brake from being flooded. The normal position is a position where the upper portion of the space around the hoisting machine brake is opened. The cover body rotates from the normal position to the sealed position by buoyancy when flooded.

2. The elevator traction machine according to claim 1, wherein: The brake cover further includes a hinge provided at the lower end portion of the cover body. The cover body is rotatably connected to the hoisting machine motor via the hinge.

3. The elevator traction machine according to claim 1 or 2, wherein: The cover body has: a main portion covering a space surrounding the traction machine brake; and A protrusion protrudes from a lower end of the main portion on the side opposite to the hoisting machine motor.

4. The elevator traction machine according to any one of claims 1 to 3, wherein: The brake cover further includes a blocking member configured to block a gap between a side surface of the cover body and the hoisting machine motor when the cover body is located at the normal position.

5. An elevator traction machine comprising: drive sheave; a traction machine motor that rotates the drive sheave; a hoisting machine brake having a brake rotor and a brake body for applying a braking force to the brake rotor, wherein the hoisting machine brake maintains the driving sheave in a stationary state; and a brake cover that covers the space around the traction machine brake, The brake cover has: a cover body provided with a vent; and a cover member disposed on the cover body so as to be displaceable between a normal position in which the vent is opened and a sealed position in which the vent is closed to seal the space around the hoisting machine brake; The cover member is displaced from the normal position to the sealed position by buoyancy when flooded.

6. The elevator traction machine according to claim 5, wherein: The elevator hoisting machine further includes a fan provided inside the ventilating opening of the cover body.

7. An elevator device, wherein: 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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