Elevator hoist

Abstract

To provide an elevator hoist capable of preventing dust from entering inside a cover even when the cover with an opening where a rope passes through is provided.SOLUTION: The present invention is an elevator hoist to raise / lower a car via a driving rope. The elevator hoist comprises a sheave to support the rope, a brake to brake the sheave, and a cover to cover the sheave and the brake, providing a rope passage opening through which the rope passes, and having a suction part to intake air into it. The suction part comprises an air blower to blow air into the cover and a filter through which the air flow introduced into the cover passes.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an elevator hoist provided with a brake. [Background technology]

[0002] 4, an elevator hoist includes sheave 902 that supports a rope that suspends a cage and a counterweight (Patent Document 1). Sheave 902 is provided with motor housing 903 that houses a motor, and brake housings 904a, 904b that house brakes (disc brakes, etc.). Patent Document 1 describes a configuration in which oil-shielding eaves 905a, 905b are provided to prevent oil splashing from sheave 902 from adhering to the braking surface of the brake and causing a decrease in performance of hoist 901. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-157662 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, hoists are often installed in hoists and are therefore exposed to dust. In addition, in the above-mentioned hoists, the sheaves and brake components (brake disks, etc.) are exposed, and so there is a risk of dust adhering to them. To address this issue, it is conceivable to cover the sheaves and brake components with a cover. However, even in a configuration with a cover, in order to pass the rope through this cover, an opening must be provided in the portion of the cover through which the rope passes, and there is a risk of dust entering the cover through this opening.

[0005] An object of the present invention is to provide an elevator hoist that can prevent dust from entering the inside of a cover even when a cover having an opening in the part through which the rope passes is used. [Means for solving the problem]

[0006] The elevator hoist of the present invention comprises: An elevator hoist that raises and lowers a car via a drive rope, A sheave supporting the rope; A brake for braking the sheave; a cover that covers the sheave and the brake, has a rope passage opening through which the rope passes, and has an air intake portion that takes in air therein; The air intake section includes an air blower that blows air into the cover, and a filter through which airflow introduced into the cover passes.

[0007] According to this configuration, when air is taken into the cover from the intake section, dust can be removed by the filter, and the air inside the cover is discharged from the rope passage opening. In this way, the air from which dust has been removed is introduced from the intake section and discharged from the rope passage opening, so that it is possible to prevent dust from entering the inside of the cover from the rope passage opening.

[0008] In the elevator hoist, In the cover, the rope passage opening and the air intake section may be located on opposite sides across the sheave and the brake.

[0009] According to this configuration, the sheave and the brake are located in the path through which air from which dust has been removed is introduced from the intake section and discharged from the rope passage opening, thereby preventing dust from adhering to the sheave and the brake.

[0010] In the elevator hoist, The space within the cover is divided into two spaces, The rope passage opening and the air intake section are disposed in the two spaces, respectively. The amount of air intake by the air intake section corresponding to the rope passage opening on the side where the rope enters the cover may be greater than the amount of air intake by the air intake section corresponding to the rope passage opening on the side where the rope exits the cover.

[0011] According to this configuration, by discharging more air from the rope passage opening on the side where the rope enters the cover depending on the direction in which the rope moves (the car rising or falling), it is possible to prevent dust from entering the inside of the cover through the rope passage opening due to the introduction of the rope. Effect of the Invention

[0012] As described above, according to the present invention, it is possible to provide an elevator hoist that can prevent dust from entering the inside of a cover, even when a cover is used that has an opening in the part through which the rope passes. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic perspective view of an elevator according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic front view of a hoist and a brake of the elevator. [Diagram 3] FIG. 3 is a schematic front view of an elevator hoist and a brake according to a modified example. [Figure 4] FIG. 4 is a side view of a conventional elevator hoist and brake. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, one embodiment of the present invention will be described with reference to Figures 1 and 2. First, an elevator equipped with a hoisting machine according to one embodiment of the present invention will be described, and then a specific configuration of the hoisting machine will be described.

[0015] As shown in Fig. 1, the elevator 1 includes a car C that can move along a hoistway 2, a rope 3 connected to the car C, a hoist 4 that drives the rope 3, and a counterweight W. The elevator 1 also includes a control unit 5 that controls the operation of the car C. In this embodiment, the hoist 4 is disposed at the bottom of the hoistway 2, but it may be disposed at another location, such as at the top of the hoistway 2.

[0016] Rope 3 is a rope that suspends car C and counterweight W.

[0017] The hoist 4 is an elevator hoist that raises and lowers a car C via a drive rope 3. As shown in Fig. 2, the hoist 4 includes a sheave 6 that supports the rope 3, and a brake 7 that brakes the sheave 6. The hoist 4 also includes a cover 8 that covers the sheave 6 and the brake 7. The hoist 4 also includes a motor that drives the sheave 6, and a support part on which the sheave 6 is supported.

[0018] The sheave 6 is connected to a rotor of a motor. The sheave 6 is also connected to a brake disc 70, which will be described later. Furthermore, the sheave 6 is rotatably supported by the hoisting machine 4 via a bearing.

[0019] The brake 7 is, for example, a disc brake. In this embodiment, the brake 7 includes a disk-shaped brake disc 70 that rotates together with the sheave 6, and a plurality of clampers 71. Three clampers 71 are provided, but two, four or more clampers 71 may be provided. In addition, the brake 7 is disposed below the sheave 6, but it may be disposed in another position (such as above the sheave 6).

[0020] The cover 8 has a cover housing 80 that houses the sheave 6 and the brake 7. The cover 8 is also provided with a rope passing opening 81 through which the rope 3 passes, and has an air intake section 82 that takes in air inside.

[0021] The cover housing 80 is, for example, a box-shaped member. Specifically, the cover housing 80 has a front part 800, an upper part 801, a lower part 802, and a pair of side parts 803 and 804 that cover the sheave 6 and the brake 7 from the front, above, below, and sides, respectively (see Figs. 1 and 2). The front part 800, the upper part 801, the lower part 802, and the pair of side parts 803 and 804 are each substantially rectangular plate-shaped. Note that the cover housing 80 may have a back part that covers the back of the sheave 6 and the brake 7 in addition to the front part 800, the upper part 801, the lower part 802, and the pair of side parts 803 and 804. The shape of the cover housing 80 may be another shape (such as a shape that combines a cylindrical part and a disk part that closes one of the openings of the cylindrical part). The cover housing 80 is formed of a metal plate.

[0022] 2, in the cover housing 80 of this embodiment, the portion covering the sheave 6 and the portion covering the brake 7 are integrated, but they may be separate members. When the member covering the sheave 6 and the member covering the brake 7 are separate members, a seal may be provided between these members to prevent dust from entering the inside of the cover housing 80 through the gap between these members.

[0023] The rope passing opening 81 is an opening formed in the cover housing 80 .

[0024] The air intake section 82 includes a filter 83 through which the airflow introduced into the cover 8 passes, and an air blower 84 that blows air into the cover 8. In this embodiment, the filter 83 and the air blower 84 are disposed adjacent to each other. The filter 83 and the air blower 84 are also disposed in an opening (air intake) formed in the cover housing 80.

[0025] The filter 83 is a filter that removes dust. The blower 84 is provided inside the filter 83. The blower 84 may be provided outside the filter 83. The blower 84 is, for example, a fan, but the configuration is not important as long as it is a device that can blow air from the outside to the inside of the cover 8.

[0026] According to this configuration, when air is taken into the cover 8 from the intake section 82, dust can be removed by the filter 83, and the air inside the cover 8 is discharged from the rope passing opening 81. In this way, air from which dust has been removed is introduced from the intake section 82 and discharged from the rope passing opening 81, so that dust can be prevented from entering the inside of the cover 8 from the rope passing opening 81 and adhering to the bearings or the braking surfaces of the brakes 7.

[0027] In this embodiment, two rope passing openings 81 are provided on the side of the cover housing 80 where the rope 3 enters the cover 8 and on the side where the rope 3 exits the cover 8. The two rope passing openings 81 are formed in the upper surface 801 of the cover housing 80. When the hoisting machine 4 is disposed at the upper part of the hoistway 2, the rope passing opening 81 is disposed in the lower surface 802 of the cover housing 80.

[0028] In this embodiment, one intake section 82 is provided in the cover housing 80. Specifically, the intake section 82 is provided in the lower part of one side surface portion 803 of the cover housing 80. In this manner, when the intake section 82 is provided in the side surface portion 803 or the side surface portion 804 of the cover housing 80, maintenance of the intake section 82 can be easily performed from the side of the cover 8.

[0029] In the cover 8 of this embodiment, the rope passing opening 81 and the air intake section 82 are located on opposite sides of the sheave 6 and the brake 7. Specifically, the rope passing opening 81 is provided in the upper surface portion 801 of the cover 8, the air intake section 82 is provided in the lower end portion of the side surface portion 803 of the cover 8, and the sheave 6 and the brake 7 are disposed between the upper surface portion 801 and the lower end portion of the side surface portion 803 of the cover 8.

[0030] According to this configuration, the sheave 6 and the brake 7 are located in the path through which the air from which dust has been removed is introduced from the intake section 82 and discharged from the rope passage opening 81, thereby preventing dust from adhering to the sheave 6 and the brake 7.

[0031] Also, it is preferable that the rope passage opening 81 of the cover 8 is formed to have a size larger than the dimension through which the rope 3 can pass. This is because, for example, wear on the sheave 6 after the installation of the hoisting machine 4 may cause the rope 3 to be more likely to swing (vibrate) when the car C rises and falls compared to when it was installed. Note that the rope passage opening 81 may be provided with a brush or glass wool to fill the gap between the rope 3 and the cover housing 80.

[0032] In this embodiment, the control unit 5 controls the amount of intake air by the intake unit 82. The intake air by the intake unit 82 is always performed. The intake air by the intake unit 82 may be performed intermittently to the extent that the airflow inside the cover 8 is maintained. The amount of intake air by the intake unit 82 may be constant or may be changed according to the elevation and descent of the car C, etc.

[0033] The blower 84 of the intake section 82 is driven by the power source of the motor that drives the sheave 6, but may be driven by a separate power source (battery). Also, the current value of the blower 84 may be monitored, and the filter 83 of the intake section 82 may be replaced when the current value becomes large.

[0034] It should be noted that the elevator hoist 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, and 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.

[0035] In the above embodiment, the intake unit 82 is provided on the lower part of one side surface portion 803 of the cover housing 80, but the position of the intake unit 82 is not important. For example, the intake unit 82 may be provided on the lower surface portion 802 of the cover housing 80.

[0036] In the above embodiment, one intake section 82 is provided in the cover housing 80, but multiple intake sections 82 (specifically, two) may be provided as shown in Fig. 3. In this cover 8, the space inside the cover 8 is divided into two spaces A1 and A2. Specifically, the space inside the cover 8 is divided into spaces A1 and A2 by a wall section 805 located at the center in the width direction of the cover housing 80. The wall section 805 extends from the center in the width direction of the front section 800 of the cover main body 80 to the back side, and also extends from above to below. In addition, the sheave 6 is provided across the two spaces A1 and A2.

[0037] A rope passing opening 81 and an air intake section 82 are disposed in each of the two spaces A1 and A2. The air intake sections 82 are disposed in the lower parts of a pair of side sections 803 and 804 of the cover housing 80. Furthermore, the air intake volume of the air intake section 82 corresponding to the rope passing opening 81 on the side where the rope 3 enters the cover 8 is set to be larger than the air intake volume of the air intake section 82 corresponding to the rope passing opening 81 on the side where the rope 3 exits the cover 8.

[0038] According to this configuration, by discharging more air from the rope passing opening 81 on the side where the rope 3 enters the cover 8 depending on the direction in which the rope 3 moves (ascending or descending of the car C), it is possible to prevent dust from entering the inside of the cover 8 from the rope passing opening 81 due to the influence of the introduction of the rope 3 (being pulled by the rope 3). Also, by reducing the amount of air intake by the air intake section 82 corresponding to the rope passing opening 81 on the side where the rope 3 exits the cover 8, it is possible to reduce the power required for intake.

[0039] In the above embodiment, the filter 83 and the blower 84 are disposed adjacent to the opening (air intake) formed in the cover housing 80, but the filter 83 and the blower 84 may be disposed in different locations. For example, only the filter 83 may be disposed at an air intake provided in a lower portion inside the cover 8, and the blower 84 may be disposed in an upper portion inside the cover 8, etc.

[0040] In the above embodiment, the brake 7 is a disk brake, but it may be another type of brake (for example, a drum brake, etc.). [Explanation of symbols]

[0041] Reference Signs List 1...Elevator, 2...Hoistway, 3...Rope, 4...Hoisting machine, 5...Control unit, 6...Sheave, 7...Brake, 8...Cover, 70...Brake disc, 71...Clamper, 80...Cover housing, 81...Rope passage opening, 82...Air intake section, 83...Filter, 84...Blower, 800...Front section, 801...Top section, 802...Bottom section, 803, 804...Side sections, 805...Wall section, 901...Hoisting machine, 902...Sheave, 903...Motor housing, 904a, 904b...Brake housing, 905a, 905b...Eaves, A1, A2...Space, C...Cage, W...Counterweight

Claims

1. An elevator hoist that raises and lowers a car via a drive rope, A sheave supporting the rope; A brake for braking the sheave; a cover that covers the sheave and the brake, has a rope passage opening through which the rope passes, and has an air intake portion that takes in air therein; The air intake section of the elevator hoist includes a blower that blows air into the cover, and a filter through which the airflow introduced into the cover passes.

2. The elevator hoist according to claim 1 , wherein in the cover, the rope passage opening and the air intake are located on opposite sides across the sheave and the brake.

3. The space within the cover is divided into two spaces, The rope passage opening and the air intake section are disposed in the two spaces, respectively.

3. The elevator hoist according to claim 1, wherein an intake volume of the intake section corresponding to the rope passage opening on a side where the rope enters the cover is greater than an intake volume of the intake section corresponding to the rope passage opening on a side where the rope exits the cover.

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