Maintenance apparatus for hoisting machine

Abstract

To provide a maintenance device of a hoisting machine capable of easily performing maintenance and inspection work.SOLUTION: The maintenance device 30 includes a hanging bracket 31, an arm member 32, and a holding bracket 33. The hanging bracket 31 is fixed to the hoisting machine 6. The arm member 32 is attached to the hanging bracket 31, and the lifting device 34 is attached to a tip end portion of the arm member 32. The holding bracket 33 is fixed to a work object part 14A which is a work object in the hoisting machine 6. The holding bracket 33 has a mounting part 43 on which a hook of the lifting device 34 is hooked.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a maintenance device for a hoist machine used when performing maintenance and inspection of a hoist machine in an elevator. [Background technology]

[0002] Conventionally, elevators are equipped with a car, a counterweight, a rope connecting the car and the counterweight, and a hoist around which the rope is wound. During maintenance and inspection, various components of the hoist, such as the brake and pedestal cover, are removed.

[0003] A technique for removing parts from a hoist during maintenance and inspection work is described, for example, in Patent Document 1. Patent Document 1 describes a technique related to an elevator braking device replacement device used when replacing a braking device. The replacement device described in Patent Document 1 includes a main body fixed to a pedestal at multiple locations, fixing means for fixing the main body to the pedestal, and a lifting device attached to the main body for lifting the braking device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-84199 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technology described in Patent Document 1, pin holes that support the brakes are used to install the main body on the pedestal, which means that the brakes, which are not the target of the work, must also be removed from the pedestal, making maintenance and inspection of the hoisting machine extremely complicated.

[0006] In consideration of the above problems, an object of the present invention is to provide a maintenance device for a hoist that can easily perform maintenance and inspection work. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the present object, a hoist maintenance device is a maintenance device used during maintenance and inspection work on an elevator hoist. The maintenance device includes a hanging bracket, an arm member, and a holding bracket. The hanging bracket is fixed to the hoist. The arm member is attached to the hanging bracket and has a lifting device attached to its tip. The holding bracket is fixed to a work target part of the hoist that is to be worked on. The holding bracket also has an attachment portion to which a hook of the lifting device is attached. [Effects of the Invention]

[0008] According to the maintenance device for a hoisting machine having the above configuration, maintenance and inspection work can be easily performed. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram showing an elevator to which a maintenance device according to an embodiment is applied. [Figure 2] 1 is a front view showing a hoist to which a maintenance device according to an embodiment is applied; [Figure 3] 10A and 10B are diagrams illustrating a brake removal operation using the maintenance device according to the embodiment. [Figure 4] 1 is a plan view showing a state in which a holding bracket of a maintenance device according to an embodiment is attached to a brake. FIG. [Figure 5] FIG. 2 is a plan view showing a holding bracket of the maintenance device according to the embodiment. [Figure 6] 1 is a side view showing a holding bracket of a maintenance device according to an embodiment; [Figure 7] 1 is a front view showing a hanging bracket and an arm member of a maintenance device according to an embodiment. FIG. [Figure 8]1 is a front view showing a state in which an arm member is attached to a hanging bracket of a maintenance device according to an embodiment. FIG. [Figure 9] 1 is a plan view showing a state in which a suspension bracket of a maintenance device according to an embodiment is attached to a brake. FIG. [Figure 10] 1 is a plan view showing a state in which a suspension bracket and an arm member of a maintenance device according to an embodiment are attached to a brake. FIG. [Figure 11] 10A and 10B are diagrams illustrating the removal of a brake in a conventional example. [Figure 12] 10A and 10B are diagrams illustrating a brake removal operation using the maintenance device according to the embodiment. [Figure 13] 13A shows a conventional example of a brake suspension state, and FIG. 13B shows an example in which the maintenance device according to the embodiment is used. [Figure 14] FIG. 10 is a front view showing another arm member in the maintenance device according to the embodiment. [Figure 15] FIG. 10 is a front view showing a state in which another arm member is attached to a hanging bracket in the maintenance device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a car and an elevator according to an embodiment will be described with reference to Fig. 1 to Fig. 15. Note that common members in each figure are given the same reference numerals.

[0011] 1. Example of implementation 1-1. Elevator configuration example First, the configuration of an elevator to which a maintenance device according to an embodiment (hereinafter referred to as "this example") is applied will be described with reference to FIG. FIG. 1 is a schematic diagram showing an example of the configuration of an elevator.

[0012] As shown in Figure 1, elevator 1 has a car 4 that moves up and down in a hoistway 2 formed within a building structure. Elevator 1 also has a counterweight 5, a hoist 6, and a rope 7. A machine room 3 is provided at the top of hoistway 2.

[0013] The hoisting machine 6 is arranged in the machine room 3. A rope 7 is wound around a sheave 11 (see FIG. 2) of the hoisting machine 6. One axial end of the rope 7 is connected to the car 4, and the other axial end of the rope 7 is connected to the counterweight 5. Therefore, the car 4 is connected to the counterweight 5 via the rope 7. When the hoisting machine 6 is driven, the car 4 and the counterweight 5 move up and down within the hoistway 2.

[0014] 1-2. Example of hoisting machine configuration Next, the configuration of the hoisting machine will be described with reference to FIG. FIG. 2 is a front view showing the hoisting machine 6. As shown in FIG.

[0015] As shown in FIG. 2, the hoisting machine 6 is mounted on a machine beam 12. The machine beam 12 is installed in the machine room 3. The hoisting machine 6 also has a sheave 11, a pedestal 13 representing a frame, a plurality of brakes 14A, 14B, and a brake disc (not shown). The sheave 11 is rotatably supported by the pedestal 13. The brake disc (not shown) is connected to the sheave 11 and rotatably supported by the pedestal 13.

[0016] A plurality of brakes 14A, 14B, and 14C are disposed radially outward from the brake disc. The brakes 14A, 14B, and 14C are disposed at intervals along the outer circumferential edge of the brake disc. Of the brakes 14A, 14B, and 14C, the brake 14A is disposed vertically lower on the pedestal 13 than the other brakes 14B and 14C. The other brakes 14B and 14C are disposed near the top of the pedestal 13 vertically. The brakes 14A, 14B, and 14C each have a friction material that grips the brake disc during braking. The brakes 14A, 14B, and 14C are supported by the pedestal 13 via a connecting pin 15.

[0017] When replacing the friction materials of the brakes 14A, 14B, and 14C or overhauling the brakes 14A, 14B, and 14C, the brakes 14A, 14B, and 14C are removed from the pedestal 13. The maintenance device 30 of this example is used for removing the brakes 14A, 14B, and 14C.

[0018] 1-3. Maintenance device configuration example Next, an example of the configuration of the maintenance device will be described with reference to FIGS. Fig. 2 is a diagram showing a state in which the maintenance device 30 is installed on the hoisting machine 6, and Fig. 3 is a diagram showing the work of removing the brake 14A. In the following explanation, an example will be described in which the brake 14A is applied as an example of a part to be removed from the hoisting machine 6, out of the multiple brakes 14A, 14B, and 14C.

[0019] 2 and 3, the maintenance device 30 has a lifting bracket 31, an arm member 32, a holding bracket 33, and a chain block 34. The lifting bracket 31 is fixed to a brake 14B that is different from the brake 14A that is the component to be worked on. The arm member 32 is detachably attached to the lifting bracket 31. The chain block 34, which represents a lifting device, is connected to the tip of the arm member 32.

[0020] A retaining bracket 33 is fixed to the brake 14A, which represents the part to be removed from the pedestal 13. The retaining bracket 33 has a suspension pin 43 (see FIG. 4), which represents an example of an attachment portion for attaching a chain block 34. A hook of the chain block 34 is hung on this suspension pin 43. Then, by removing the lower connecting pin 15 of the brake 14A in the vertical direction and operating the chain block 34, the brake 14A can be removed from the pedestal 13 as shown in FIG.

[0021] [Retaining bracket] Next, the configuration of the holding bracket 33 will be described with reference to FIGS. Fig. 4 is a plan view showing the state in which the retaining bracket 33 is attached to the brake 14A, Fig. 5 is a plan view showing the retaining bracket 33, and Fig. 6 is a side view showing the retaining bracket 33.

[0022] First, the configuration of the brake 14A will be described. As shown in Fig. 4, the brake 14A has a core 16 that moves the friction material, a housing portion 17 that houses the friction material, and a support member 18 that supports the core 16 and the housing portion 17. Connection holes into which connection pins 15 for connecting to the pedestal 13 are inserted are provided at both ends of the support member 18. The core 16 and the housing portion 17 are arranged along a direction perpendicular to the direction in which the two connection holes are provided, with the support member 18 sandwiched between them. The core 16 is set to be heavier than the housing portion 17. Therefore, the center of gravity of the brake 14A is located closer to the core 16 than to the housing portion 17.

[0023] The brake 14B, which is different from the work target part, has the same configuration as the brake 14A, and therefore its description will be omitted.

[0024] As shown in Figures 4 to 6, the holding bracket 33 is formed in a generally T-shape. The holding bracket 33 has a first holding piece 41, a second holding piece 42, and a hanging pin 43. The first holding piece 41 and the second holding piece 42 are formed in a generally flat plate shape. The second holding piece 42 is bent in a mountain shape along the outer diameter of the support member 18. Fixing holes 46 into which fixing bolts 48 are inserted are formed at both longitudinal ends of the second holding piece 42. The second holding piece 42 is fixed to the support member 18 by the fixing bolts 48.

[0025] The first holding piece 41 is connected to a middle portion of the second holding piece 42 in the longitudinal direction. The first holding piece 41 protrudes in a direction perpendicular to the longitudinal direction of the second holding piece 42. When the second holding piece 42 is fixed to the support member 18, the first holding piece 41 faces the core 16 of the brake 14A. A fixing hole 45 is formed in the end of the first holding piece 41 opposite the end connected to the second holding piece 42. The first holding piece 41 is fixed to the core 16 by inserting a fixing bolt 48 into the fixing hole 45.

[0026] Additionally, a hanging pin 43 is provided on the first holding piece 41. The hanging pin 43 is provided at a position facing the center of gravity of the brake 14A when the first holding piece 41 and the second holding piece 42 are fixed to the brake 14A. Therefore, when the brake 14A is lifted via the hanging pin 43, the brake 14A can be prevented from tilting toward the core 16, which is a heavy object, and the brake 14A can be lifted stably.

[0027] [Hanging bracket and arm components] Next, the configuration of the hanging bracket 31 and the arm member 32 will be described with reference to FIGS. 7 and 8 are front views showing the hanging bracket 31 and the arm member 32, FIG. 9 is a plan view showing the hanging bracket 31 attached to the brake 14B, and FIG. 10 is a plan view showing the hanging bracket 31 and the arm member 32 attached to the brake 14B.

[0028] 7 to 10, the hanging bracket 31 is formed in a generally flat plate shape. Like the second holding piece 42 of the holding bracket 33, the hanging bracket 31 is bent in a mountain shape along the outer diameter of the support member 18. The hanging bracket 31 has a connection surface portion 31a and fixing surface portions 31b provided continuously to both longitudinal ends of the connection surface portion 31a.

[0029] A connection portion 31c is provided at the longitudinal middle of the connection surface portion 31a. An arm member 32 is detachably connected to the connection portion 31c. The arm member 32 is bent so that, when the hanging bracket 31 is fixed to the brake 14B, its tip portion 32a is positioned above the brake 14A, which is the component to be worked on, in the vertical direction. A chain block 34 is connected to the tip portion 32a of the arm member 32.

[0030] The fixing surface portion 31b is bent relative to the connecting surface portion 31a. A fixing hole (not shown) into which a fixing bolt 48 is inserted is formed in the end of the fixing surface portion 31b opposite the end that connects to the connecting surface portion 31a. Then, as shown in FIGS. 10 and 11 , the hoisting bracket 31 is fixed to the support member 18 of the brake 14B via the fixing bolt 48. In this way, according to the maintenance device 30 of this example, the hoisting bracket 31 is fixed to the brake 14B, which is different from the brake 14A that is the component that is the target of the work. In other words, the hoisting bracket 31 is directly fixed to the hoisting machine 6. As a result, the hoisting bracket 31 is fixed without removing any components from the hoisting machine 6 other than the brake 14A that is the component that is the target of the work, and therefore maintenance and inspection work on the hoisting machine 6 can be easily performed.

[0031] 2. Comparison with conventional examples Next, a comparison will be made between the work of removing the brake 14A using the maintenance device 30 of this embodiment and the work of removing the brake 14A in a conventional example, with reference to FIGS. Fig. 11 is a diagram showing the removal of brake 14A in a conventional example. Fig. 12 is a diagram showing the removal of brake 14A using maintenance device 30 of this example. Figs. 13A and 13B are diagrams showing the suspension state of brake 14A in maintenance device 30 of the conventional example and this example.

[0032] As shown in FIG. 11, in the conventional example, a chain block 104, which is a lifting device, is installed on the ceiling of the machine room 3. Also, as shown in FIGS. 11 and 13A, a plurality of lifting pins 103 are provided on the support member 18 of the brake 14A. In the conventional example, the brake 14A is lifted by hanging hooks on the chain 102 of the chain block 104 on the plurality of lifting pins 103. As shown in FIG. 11, in the conventional example, a lifting point provided on the ceiling of the machine room 3 is used to install the chain block 104. However, if there is no lifting point in the machine room 3, a scaffolding must be assembled. Therefore, in the conventional example, maintenance work on the brake 14A is very complicated.

[0033] In contrast, in the maintenance device 30 of this example, the suspension bracket 31 on which the chain block 34 is mounted is fixed to the brake 14B, which is different from the part being worked on. This eliminates the need to use a suspension point in the machine room 3 or to assemble a tower, etc. As a result, the installation work of the chain block 34 can be easily carried out.

[0034] As described above, the center of gravity of the brake 14A is biased toward the core 16, not on the support member 18. Therefore, in the conventional example in which the suspension pin 103 is disposed on the support member 18 as shown in Fig. 13A, when the brake 14A is lifted up, the brake 14A hangs down toward the core 16, making it difficult to stably lift the brake 14A. Therefore, in the conventional example, it was necessary to provide multiple suspension pins 103 on the support member 18 and further balance the brake 14A when lifted up using a lever block (registered trademark) 105.

[0035] In contrast, in the maintenance device 30 of this embodiment, as described above, the suspension pin 43 provided on the holding bracket 33 is provided opposite the position of the center of gravity of the brake 14A. This allows the brake 14A to be balanced when lifted without using the lever block 105. As a result, the brake 14A can be stably lifted, making it easy to perform maintenance work on the brake 14A. Furthermore, only one suspension pin 43 needs to be provided on the holding bracket 33, which also reduces the number of parts.

[0036] 3. Modified examples of arm members Next, a modified example of the arm member will be described with reference to FIGS. 14 and 15 are diagrams showing modified examples of the arm member.

[0037] 14 and 15 is used to lift up the brake 14B arranged at the top of the hoisting machine 6 shown in FIG. 2. At this time, the holding bracket 33 is fixed to the brake 14B. Then, the lifting bracket 31 is fixed to the brake 14C, of ​​the two brakes 14B and 14C arranged at the top of the hoisting machine 6, that is adjacent to the brake 14B, which is the component to be worked on.

[0038] 14 and 15, the arm member 62 is bent at a different angle than the arm member 32 shown in FIGS. 7 and 8. The length of the arm member 62 is set to a different length than the arm member 32. When the hanging bracket 31 is fixed to the brake 14C, the tip end 32a of the arm member 62 is positioned above the brake 14B, which is the component to be worked on, in the vertical direction. The arm member 62 is detachably connected to the connection portion 31c of the hanging bracket 31. The chain block 34 is connected to the tip end 62a, which is the end of the arm member 62 opposite to the connection portion 31c.

[0039] As described above, the maintenance device 30 of this example is provided with a plurality of arm members 32, 62 corresponding to the positions of the brakes 14A, 14B, 14C, which are the components to be lifted. The worker selects the corresponding arm member 32, 62 from the plurality of arm members 32, 62 according to the brakes 14A, 14B, 14C, which are the components to be lifted, and attaches it to the lifting bracket 31. This allows the chain block 34 to always be positioned above the brakes 14A, 14B, which are the components to be lifted. As a result, the brakes 14A, 14B can be stably lifted.

[0040] The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention as set forth in the claims.

[0041] In the above-described embodiment, an example has been described in which the brakes 14A and 14B are applied as an example of a part to be worked on during maintenance and inspection work on the hoisting machine 6, but the present invention is not limited to this. Examples of parts to be worked on include the pedestal 13 of the hoisting machine 6, a cover that covers the drive unit, and various other parts. Therefore, the holding bracket is fixed to the part to be worked on, and the lifting bracket is fixed to the outer periphery of the hoisting machine 6. Therefore, the holding bracket is formed to fit the shape of the part to be worked on. Furthermore, the lifting bracket is formed to fit the shape of the fixing point on the hoisting machine 6.

[0042] Furthermore, the maintenance device has a plurality of arm members with different lengths and bending angles, and a predetermined arm member is selected from the plurality of arm members and attached to the hanging bracket depending on the length from the hanging bracket to the component to be worked on and the position of the component to be worked on.

[0043] In the above-described embodiment, the configuration of the elevator 1 is not limited to the 1:1 roping elevator shown in FIG. 1, but various other elevators such as a 2:1 roping elevator and a machine room-less elevator that does not have a machine room can also be applied.

[0044] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "substantially parallel" or "substantially orthogonal" state within a range in which the functions can be exerted. [Explanation of symbols]

[0045] DESCRIPTION OF SYMBOLS 1...Elevator, 2...Hoistway, 3...Machine room, 4...Cab, 5...Counterweight, 6...Hoisting machine, 7...Rope, 11...Sheave, 12...Machine beam, 13...Pedestal, 14A, 14B, 14C...Brake (work target part), 15...Connecting pin, 16...Core, 17...Storage part, 18...Support member, 30...Maintenance device, 31...Lifting bracket, 31a...Connection surface part, 31b...Fixing surface part, 31c...Connection part, 32, 62...Arm member, 32a, 62a...Tip part, 33...Retaining bracket, 34...Chain block (lifting device), 41...First retaining piece, 42...Second retaining piece, 43...Lifting pin (mounting part), 45, 46...Fixing hole, 48...Fixing bolt

Claims

1. In maintenance equipment used during maintenance and inspection work on elevator hoisting machines, A suspension bracket fixed to the aforementioned hoisting machine, An arm member attached to the aforementioned suspension bracket, with a lifting device attached to its tip, A retaining bracket fixed to the workpiece to be worked on in the aforementioned hoisting machine, Equipped with, The retaining bracket has a mounting portion for attaching the lifting device. Maintenance equipment for hoisting machines.

2. The suspension bracket has a connecting portion to which the arm member is detachably connected. The aforementioned arm member has a plurality of arm members with different lengths and bending angles. From a plurality of arm members, a predetermined arm member is selected according to the length from the suspension bracket to the workpiece and the position of the workpiece, and the selected arm member is attached to the suspension bracket. Maintenance device for a hoisting machine according to claim 1.

3. The hoisting machine has a plurality of brakes and a pedestal that supports the plurality of brakes, The aforementioned work target is one of several brakes, The retaining bracket is fixed to the brake, which is the part to be worked on. The suspension bracket is fixed to a brake other than the brake that is the work target among the multiple brakes. Maintenance device for a hoisting machine according to claim 1.

4. The mounting portion provided on the retaining bracket is positioned opposite to the center of gravity of the brake, which is the workpiece. Maintenance device for a hoisting machine according to claim 3.

5. The suspension bracket is fixed to a support member that supports the core in the brake. Maintenance device for a hoisting machine according to claim 3.

6. The retaining bracket includes a first retaining piece fixed to the brake core, The brake has a second retaining piece that supports the core of the brake, The mounting portion is provided on the first retaining piece. Maintenance device for a hoisting machine according to claim 4.

7. The aforementioned mounting portion is a suspension pin on which the hook of the lifting device is attached. Maintenance device for a hoisting machine according to claim 1.

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