Hoist and elevator

Abstract

To provide a hoist and an elevator capable of easily performing inspection work of a sheave and preventing parts from falling into a hoistway during the inspection work.SOLUTION: A hoist 4 comprises a sheave 22 around which the main rope is wound, a drive unit connected to the sheave 22 and rotating the sheave 22, a housing 21 that houses the drive unit, and a sheave cover 24 that covers at least a portion of the outer periphery of the sheave 22. The sheave cover 24 comprises fixed covers 32A, 32B that are fixed to the housing 21 and have openings that face the outer periphery of the sheave 22, and a movable cover 31 that is movably attached to the fixed covers 32A, 32B and closes the openings.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a hoist and an elevator. [Background technology]

[0002] Generally, a rope-type elevator is equipped with a car, a counterweight, a main rope that connects the car and the counterweight, and a hoist around which the main rope is wound. When the hoist is driven, the car and the counterweight move up and down the elevator shaft.

[0003] In addition, the hoist is provided with a sheave cover that covers at least a part of the sheave in order to prevent foreign matter from entering the sheave groove of the sheave, to prevent oil from scattering, to prevent the sheave from being caught during inspection, etc. As a conventional technique of this type, for example, there is one described in Patent Document 1.

[0004] Patent Document 1 describes a technique related to a cover that covers a drive sheave around which a rope is attached with one end attached to a cage and the other end attached to a counterweight. Patent Document 1 describes that the cover includes a cover main body that covers the drive sheave, and a rope cover member that is movably attached to the cover main body to cover the rope that is deflected from the drive sheave to the counterweight side by the deflection sheave. Patent Document 1 also describes that the rope cover member can be fixed to the cover main body in accordance with the angle of the deflected rope.

[0005] During regular inspections and maintenance, it is necessary to place a measuring jig on the sheave groove to check the amount of wear in the sheave groove. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 11-79604 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the technology described in Patent Document 1, in order to place a measuring jig on the sheave groove during inspection, it was necessary to remove the entire sheave cover from the housing. As a result, the technology described in Patent Document 1 not only made the inspection work very complicated, but also had the problem that there was a risk that parts such as the fixing screws and the sheave cover would fall into the hoistway when the sheave cover was removed.

[0008] In consideration of the above problems, the object of the present invention is to provide a hoist and elevator that allows for easy inspection of sheaves and prevents parts from falling into the hoistway during inspection. [Means for solving the problem]

[0009] In order to solve the above problems and achieve the object, the hoist includes a sheave around which the main rope is wound, a drive unit connected to the sheave and rotating the sheave, a housing that houses the drive unit, and a sheave cover that covers at least a part of the outer periphery of the sheave. The sheave cover includes a fixed cover that is fixed to the housing and has an opening facing the outer periphery of the sheave, and a movable cover that is movably attached to the fixed cover and closes the opening.

[0010] The elevator also includes a car, a counterweight connected to the car via a main rope, and a hoist that raises and lowers the car by winding the main rope around it. The hoist is the same as the hoist described above. Effect of the Invention

[0011] According to the hoist and elevator of the above configuration, the sheave can be easily inspected and parts can be prevented from falling into the hoistway during the inspection work. [Brief description of the drawings]

[0012] [Figure 1]FIG. 1 is a schematic diagram showing an elevator according to a first embodiment. [Diagram 2] FIG. 1 is a side view showing a hoist according to a first embodiment. [Diagram 3] FIG. 1 is a front view showing a hoist according to a first embodiment. [Figure 4] 4A and 4B show a sheave cover according to a first embodiment, with FIG. 4A being a top view and FIG. 4B being a front view. [Diagram 5] 5A and 5B show a movable cover of a sheave cover according to a first embodiment, with FIG. 5A being a top view and FIG. 5B being a front view. [Figure 6] 6A and 6B show a fixed cover of a sheave cover according to a first embodiment, with FIG. 6A being a top view and FIG. 6B being a front view. [Figure 7] 7A and 7B show a state in which a sheave cover according to a first embodiment is partially open, with FIG. 7A being a top view and FIG. 7B being a front view. [Figure 8] FIG. 11 is a top view showing a movable cover of the sheave cover according to the second embodiment. [Figure 9] FIG. 13 is a top view showing a movable cover of the sheave cover according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, embodiments of a hoist and an elevator will be described with reference to Fig. 1 to Fig. 9. In addition, the same reference numerals are used to designate common members in each drawing.

[0014] 1. First embodiment 1-1. Elevator configuration examples First, an example of the configuration of a hoist and elevator according to a first embodiment (hereinafter referred to as "this example") will be described with reference to FIG. FIG. 1 is a schematic diagram showing an example of the configuration of an elevator.

[0015] The elevator 1 shown in FIG. 1 is a so-called machine-room-less elevator that does not have a machine room above a hoistway 100 formed within a building structure.

[0016] The elevator 1 has a car 2 that rises and falls in a hoistway 100, a main rope 3, a hoisting machine 4, and a counterweight 5. The hoisting machine 4 is installed on a machine beam 13 installed in the hoistway 100. The main rope 3 is wound around a sheave of the hoisting machine 4.

[0017] A car side pulley 2a is provided at the bottom of the car 2. A main rope 3 is wound around the car side pulley 2a. A weight side pulley 5a is provided at the counterweight 5. The main rope 3 is wound around the weight side pulley 5a.

[0018] The car 2 is movably supported by a car-side guide rail 6. The counterweight 5 is movably supported by a weight-side guide rail 7. The car-side guide rail 6 and the weight-side guide rail 7 are erected from a pit of the elevator shaft 100 toward the upward direction in the ascending / descending direction.

[0019] In addition, a car side shock absorber 11 and a weight side shock absorber 12 are installed in the pit of the elevator shaft 100. The car side shock absorber 11 is disposed below the elevator car 2 in the ascending and descending direction. The weight side shock absorber 12 is disposed below the counterweight 5 in the ascending and descending direction.

[0020] One end 8 of the main rope 3 is fixed to a machine beam 13 on which the hoisting machine 4 is installed. The other end 9 of the main rope 3 is fixed to a support beam 14 arranged above the hoistway 100. The main rope 3 hangs down from the one end 8 to the bottom of the hoistway 100, and is wound around the weight-side pulley 5a, the sheave 22 of the hoisting machine 4, and the car-side pulley 2a in this order, and the other end 9 is fixed to the support beam 14. Then, when the hoisting machine 4 is driven, the car 2 and the counterweight 5 move up and down in the hoistway 100.

[0021] 1-2. Example of a hoisting machine configuration Next, the configuration of the hoisting machine 4 will be described with reference to Figs. FIG. 2 is a side view showing the hoisting machine 4, and FIG.

[0022] 2 and 3, the hoist 4 has a housing 21, a sheave 22, a braking device 23, a sheave cover 24, a rope slippage prevention cover 25, a driving unit (not shown), and a drum. The driving unit is housed in the housing 21 and drives the sheave 22 and the drum to rotate. The braking device 23 is disposed radially outside the drum provided in the housing 21. When the braking device 23 is driven, it brakes the rotation of the drum.

[0023] In this embodiment, the two brake devices 23 are disposed above the housing 21 in the vertical direction, but the present invention is not limited to this. For example, the two brake devices 23 may be disposed so as to face each other in the vertical direction with the drum in between. The number of brake devices 23 may be one, or three or more.

[0024] A sheave 22 is connected to the main shaft of the drive unit. The sheave 22 is disposed on the front side of the housing 21. The sheave 22 is driven to rotate when the drive unit is driven. A plurality of continuous sheave grooves are formed in the outer edge of the sheave 22 along the circumferential direction of the sheave 22. The main rope 3 is wound around the sheave grooves. The sheave 22 is driven to rotate when the drive unit of the housing 21 is driven, and the main rope 3 wound around the sheave grooves moves.

[0025] A sheave cover 24 and a rope slippage prevention cover 25 are disposed on the radially outer side of the sheave 22. The rope slippage prevention cover 25 is disposed vertically lower than the center of the sheave 22. The rope slippage prevention cover 25 is fixed to the front part of the housing 21 via a fixing screw 25a. The sheave cover 24 is fixed to the vertical upper part of the rope slippage prevention cover 25 via a fixing screw 43.

[0026] The sheave cover 24 covers at least a portion of the outer periphery of the sheave 22. In this example, the sheave cover 24 covers the outer periphery of the sheave 22 above the center of the sheave 22. This sheave cover 24 not only prevents foreign matter from entering the sheave grooves of the sheave 22, but also prevents oil from splashing. In addition, the sheave cover 24 prevents an operator from getting caught in the sheave 22 during inspection work.

[0027] 1-3. Example of sheave cover configuration Next, a configuration example of the sheave cover 24 will be described with reference to Figs. 4A to 6B. Fig. 4A is a top view showing the sheave cover 24, and Fig. 4B is a front view showing the sheave cover 24. Figs. 5A and 5B are views showing a movable cover 31 of the sheave cover 24, which will be described later. Figs. 6A and 6B are views showing fixed covers 32A and 32B of the sheave cover 24, which will be described later.

[0028] As shown in FIG. 4A and FIG. 4B, the sheave cover 24 has a movable cover 31, two fixed covers 32A and 32B, a rotating pin 41, and a stopper pin 42. As shown in FIG. 3 to FIG. 4B, the two fixed covers 32A and 32B are arranged on both sides in the radial direction of the outer periphery of the sheave 22. The first fixed cover 32A is arranged on one side in the direction perpendicular to the axial direction of the sheave 22, and the second fixed cover 32B is arranged on the other side in the direction perpendicular to the axial direction of the sheave 22. The upper parts of the two fixed covers 32A and 32B in the vertical direction are arranged with a space (opening). The opening formed by the two fixed covers 32A and 32B faces the outer periphery surface (sieve surface) of the sheave 22. The movable cover 31 is arranged to close the space (opening) provided on the upper parts of the two fixed covers 32A and 32B. The movable cover 31 is disposed at the upper part in the vertical direction on the outer periphery of the sheave 22 .

[0029] The movable cover 31 is rotatably supported by the first fixed cover 32A via a rotation pin 41. In addition, a stopper pin 42 is fixed to the second fixed cover 32B.

[0030] Next, the movable cover 31 will be described. 5A and 5B, the movable cover 31 is formed in a generally rectangular flat plate shape. A rotation hole 31a is formed at one end in the longitudinal direction of the movable cover 31. The rotation hole 31a is an elongated hole extending along the longitudinal direction of the movable cover 31. A rotation pin 41 is inserted into the rotation hole 31a. The movable cover 31 rotates around the rotation pin 41.

[0031] A locking portion 31b is formed at the other end in the longitudinal direction of the movable cover 31. The locking portion 31b is a notch formed from the other end in the longitudinal direction of the movable cover 31 toward the center in the longitudinal direction of the movable cover 31. Under normal circumstances, a stopper pin 42 is inserted into the locking portion 31b. The length of the notch of the locking portion 31b is set shorter than the length of the longest portion of the rotation hole 31a which is an elongated hole.

[0032] Next, the fixed covers 32A and 32B will be described. As shown in Figures 6A and 6B, the fixed covers 32A and 32B are formed by bending a flat plate-like member. A fixed piece 33 is formed at the bottom in the vertical direction of the fixed covers 32A and 32B. Furthermore, an upper piece 34 is formed at the top in the vertical direction of the fixed covers 32A and 32B. The fixed piece 33 and the upper piece 34 are formed by bending both end portions of the fixed covers 32A and 32B.

[0033] The fixing piece 33 has a fixing hole 33a formed as an elongated hole. The fixing piece 33 is overlapped on the upper part of the rope slippage prevention cover 25. The fixing piece 33 is fastened and fixed to the rope slippage prevention cover 25 by inserting the fixing screw 43 into the fixing hole 33a. Note that, although an example in which the fixing covers 32A and 32B are fixed to the rope slippage prevention cover 25 representing the fixing bracket has been described, the present invention is not limited to this. For example, the fixing covers 32A and 32B may be directly fixed to the front part of the housing 21.

[0034] An insertion hole 34a is formed in the upper piece 34. As shown in Figs. 4A and 4B, a rotation pin 41 is inserted into the insertion hole 34a of the upper piece 34 of the first fixed cover 32A. Also, a stopper pin 42 is inserted into the insertion hole 34a of the upper piece 34 of the second fixed cover 32B. The stopper pin 42 releasably engages with the engaging portion 31b of the movable cover 31. This makes it possible to prevent the movable cover 31 from moving unintentionally under normal circumstances.

[0035] In this embodiment, the movable cover 31 and the fixed covers 32A, 32B are formed in a flat plate shape, but the present invention is not limited to this. For example, the movable cover 31 and the fixed covers 32A, 32B may be formed in an arc shape along the curvature of the sheave 22. In consideration of workability, it is preferable to form the movable cover 31 and the fixed covers 32A, 32B in a flat plate shape rather than an arc shape.

[0036] 1-4. Example of sheave cover operation Next, an example of the operation of the sheave cover 24 during inspection work of the sheave 22 will be described with reference to Figs. 7A and 7B. 7A and 7B are diagrams showing a state in which the sheave cover 24 is partially open.

[0037] When inspecting the sheave groove of the sheave 22, the worker first slides the movable cover 31 toward the first fixed cover 32A in a direction parallel to the plane of the movable cover 31. This disengages the stopper pin 42 from the locking portion 31b of the movable cover 31. Next, the movable cover 31 is rotated about the rotation pin 41 in a direction parallel to the plane of the movable cover 31.

[0038] 7A and 7B, the movable cover 31 moves away from the second fixed cover 32B toward the first fixed cover 32A. A space is formed between the first fixed cover 32A and the upper piece 34 of the second fixed cover 32B. Therefore, a part of the sheave cover 24 opens, and the upper part of the sheave 22 in the vertical direction is opened.

[0039] In this way, according to the sheave cover 24 of this example, a part of the sheave cover 24 can be opened without removing the fixing screw 43, the rotating pin 41, or the stopper pin 42. Even when the sheave cover 24 is opened, the movable cover 31 is attached to the first fixed cover 32A via the rotating pin 41. As a result, during the inspection work of the sheave 22, i.e., during the opening operation of the sheave cover 24, the risk of parts such as the fixing screw 43, the rotating pin 41, the stopper pin 42, and the movable cover 31 falling into the hoistway 100 can be reduced.

[0040] Next, the worker inserts a measuring tool into the sheave groove of the sheave 22 through the opening formed in the sheave cover 24, and inspects the amount of wear of the sheave groove. Here, the movable cover 31 is disposed above the sheave 22 in the vertical direction, and the opening formed in the sheave cover 24 is located at the top of the sheave 22. This allows the measuring tool to be inserted vertically from above into the sheave groove of the sheave 22. As a result, the inspection work of the sheave 22 can be easily performed.

[0041] In the sheave cover 24 of this embodiment, the movable cover 31 is rotated about the rotation pin 41 in a direction parallel to the plane of the movable cover 31, but the method of moving the movable cover 31 is not limited to rotation. For example, the movable cover 31 may be slid along the axial direction of the sheave 22 in a direction parallel to the plane of the movable cover 31.

[0042] When sliding the movable cover 31 along the axial direction of the sheave 22 to open a part of the sheave cover 24, the movable cover 31 needs to be connected to both the first fixed cover 32A and the second fixed cover 32B when opening. Therefore, the opening formed in the sheave cover 24 can be made larger by rotating the movable cover 31 than by sliding the movable cover 31. As a result, the inspection work of the sheave 22 can be easily performed.

[0043] Also, although an example has been described in which the movable cover 31 is disposed above the sheave 22 in the vertical direction and the opening of the sheave cover 24 is formed at the top of the sheave 22, the present invention is not limited to this. For example, the movable cover 31 may be disposed below the top of the sheave 22 in the vertical direction and the opening of the sheave cover 24 may be formed below the top of the sheave 22. Note that by disposing the movable cover 31 above the sheave 22 in the vertical direction and forming the opening of the sheave cover 24 at the top of the sheave 22, it becomes easier to insert a measuring tool perpendicularly into the sheave groove during inspection work.

[0044] The amount of wear of the sheave groove is calculated from the amount of sinking of the main rope 3 into the sheave groove. Therefore, it is necessary to check the top surface of the sheave 22 in the vertical direction where the main rope 3 is hung on the sheave 22 during inspection. Therefore, it is preferable to arrange the movable cover 31 above the sheave 22 in the vertical direction and arrange the opening formed in the sheave cover 24 above the sheave 22.

[0045] 2. Second embodiment Next, a sheave cover according to a second embodiment will be described with reference to Fig. 8. Fig. 8 is a top view showing a movable cover of the sheave cover according to the second embodiment.

[0046] The sheave cover according to the second embodiment differs from the sheave cover 24 according to the first embodiment in the configuration of the movable cover. Therefore, the parts common to the sheave cover 24 according to the first embodiment are given the same reference numerals and the duplicated explanations are omitted.

[0047] 8, the movable cover 61 is formed in a substantially rectangular flat plate shape. A rotation hole 61a into which a rotation pin can be inserted is formed at one end of the movable cover 61 in the longitudinal direction. In the movable cover 61 according to the second embodiment, the rotation hole 61a is formed in a circular shape.

[0048] A locking portion 61b is formed at the other end in the longitudinal direction of the movable cover 61. The stopper pin 42 is inserted into the locking portion 61b. The locking portion 61b is formed by cutting out an arc shape from one end in the lateral direction of the movable cover 61 toward the center in the lateral direction of the movable cover 61. That is, the locking portion 61b is formed along the rotation trajectory of the movable cover 61. According to the sheave cover of the second embodiment, a sliding operation for releasing the lock between the locking portion 61b and the stopper pin 42 before rotating the movable cover 61 is not required.

[0049] Other configurations are the same as those of the sheave cover 24 according to the first embodiment, and therefore the description thereof will be omitted. With the sheave cover having such a movable cover 61, it is possible to obtain the same effects as those of the sheave cover 24 according to the first embodiment described above.

[0050] 3. Third embodiment Next, a sheave cover according to a third embodiment will be described with reference to Fig. 9. Fig. 9 is a top view showing a movable cover of the sheave cover according to the third embodiment.

[0051] The sheave cover according to the third embodiment differs from the sheave cover 24 according to the first embodiment in the configuration of the movable cover. Therefore, the parts common to the sheave cover 24 according to the first embodiment are given the same reference numerals and the duplicated explanations are omitted.

[0052] 9, the movable cover 71 is formed in a substantially rectangular flat plate shape. A rotation hole 71a into which a rotation pin can be inserted is formed at one end of the movable cover 71 in the longitudinal direction. In the movable cover 71 according to the third embodiment, the rotation hole 71a is formed in a circular shape.

[0053] A locking portion 71b is formed at the other end in the longitudinal direction of the movable cover 71. The stopper pin 42 is locked to the locking portion 71b. The locking portion 71b is formed by cutting out the other end of the movable cover 71 into a hook shape. That is, the locking portion 71b is formed so as to be able to be locked to the stopper pin 42. According to the sheave cover of the third embodiment, a sliding operation for releasing the lock between the locking portion 71b and the stopper pin 42 before rotating the movable cover 71 is not required.

[0054] Other configurations are the same as those of the sheave cover 24 according to the first embodiment, and therefore the description thereof will be omitted. With the sheave cover having such a movable cover 71, it is possible to obtain the same effects as those of the sheave cover 24 according to the first embodiment described above.

[0055] The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention as defined in the claims.

[0056] For example, in the above-described embodiment, an example has been described in which the hoisting machine 4 is installed at the top of the hoistway 100, but this is not limited to this. For example, the hoisting machine 4 may be installed at the bottom of the hoistway 100 or in the middle of the hoistway 100, and the location where the hoisting machine 4 is installed is not limited.

[0057] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but may also mean a "substantially parallel" or "substantially orthogonal" state that includes "parallel" and "orthogonal" and is within a range in which the respective functions can be exerted. [Explanation of symbols]

[0058]

[0033] 1... elevator, 2... car, 3... main rope, 4... hoist, 21... housing, 22... sheave, 23... brake device, 24... sheave cover, 25... rope stopper cover, 31, 61, 71... movable cover, 31a, 61a, 71a... rotation hole, 31b, 61b, 71b... latching portion, 32A... first fixed cover, 32B... second fixed cover, 33... fixed piece, 33a... fixing hole, 34... upper piece, 34a... insertion hole, 41... rotation pin, 42... stopper pin, 100... elevator shaft

Claims

1. a sheave around which the main rope is wound; A drive unit connected to the sheave and rotating the sheave; A housing that houses the drive unit; A sheave cover that covers at least a portion of the outer periphery of the sheave, The sheave cover is A fixed cover fixed to the housing and having an opening facing an outer circumferential surface of the sheave; a movable cover movably attached to the fixed cover and closing the opening; A hoisting machine equipped with

2. The fixed cover is provided with a rotation pin that rotatably supports the movable cover. A hoist as claimed in claim 1.

3. The fixed cover is provided with a stopper pin that releasably engages with a locking portion provided on the movable cover. A hoist as claimed in claim 1.

4. The opening formed in the fixed cover is located at an upper portion of the sheave in the up-down direction, The movable cover is disposed above the sheave in the up-down direction. A hoist as claimed in claim 1.

5. The fixed cover is A first fixed cover disposed on one side in a direction perpendicular to an axial direction of the sheave; A second fixed cover is disposed on the other side in a direction perpendicular to the axial direction of the sheave, The opening is a space formed between the first fixed cover and the second fixed cover. A hoist as claimed in claim 1.

6. The first fixed cover is provided with a rotation pin that rotatably supports the movable cover, The second fixed cover is provided with a stopper pin that releasably engages with a locking portion provided on the movable cover. A hoist according to claim 5.

7. The fixed cover and the movable cover are formed of flat plate-shaped members. A hoist as claimed in claim 1.

8. A car, A counterweight connected to the car via a main rope; A hoist that lifts and lowers the car by winding the main rope around it, The hoisting machine includes: a sheave around which the main rope is wound; A drive unit connected to the sheave and rotating the sheave; A housing that houses the drive unit; A sheave cover that covers at least a portion of the outer periphery of the sheave, The sheave cover is A fixed cover fixed to the housing and having an opening facing an outer circumferential surface of the sheave; a movable cover movably attached to the fixed cover and closing the opening; Equipped with elevator.

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