JPH1121043A - Method for attaching and detaching upper gear case of elevator hoist - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for attaching and detaching an upper gear case of an elevator hoist, by which the upper gear case can be easily detached without additional work for boring a ceiling even in a case where the distance between the upper gear case and the ceiling is extremely small. SOLUTION: A fitting device 17 provided with a bar-shaped member 17a in the position approximately parallel to the axis of a worm wheel and able to be moved in the longitudinal directions of the strength members 13a, 13b is constituted on the strength members 13a, 13b on the upper part of an upper gear case 8a, chain blocks 18a, 18b connected to the upper gear case 8a are attached to the strength members 13a, 13b on one side of the rod-shaped member 17a, a chain block 20 to which a wire rope 22 attached to the upper gear case 8a is connected through the upper part of the bar-shaped member 17a is provided on the other side of the bar-shaped member 17a, and the movement of the upper gear case 8a is controlled by respective chain blocks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching and detaching a gear case on an elevator hoist.

[0002]

2. Description of the Related Art In general, an elevator hoisting machine causes deterioration of constituent parts with aging. Therefore, maintenance work for exchanging parts after each deterioration or predicting the life before the deterioration is performed to maintain the performance. Is necessary for In order to replace the components, it is necessary to disassemble the hoist. At this time, since the individual components are heavy, a lifting operation using a lifting device is required. In a hoisting machine in which the gear case containing the worm shaft, worm wheel, bearings, and other components is divided into upper and lower parts, when replacing the components, lift the lift to separate the upper gear case from the lower gear case. Lifting work using the device is required.

[0003] A conventional method of attaching and detaching an upper gear case of an elevator hoisting machine is to lift a lifting device having a chain block to a position above the upper gear case where the upper gear case and the worm wheel do not overlap in the height direction. After being arranged at the position considered, the lifting rope is passed through the mounting bolt holes for fixing the upper gear case and the lower gear case, and the lifting operation is performed by slinging the lifting rope on the hook of the chain block. After lifting the upper gear case, perform the maintenance work in a state where the upper gear case is horizontally moved and kept in a position where it does not interfere with the maintenance work.After the maintenance work is completed, attach and detach the upper gear case to the lower gear case by the reverse procedure described above. Has been completed.

[0004]

However, in the conventional method of attaching / detaching the upper gear case of the elevator hoisting machine, since the lifting device having the chain block on the upper gear case is arranged as described above, the elevator machine room is used. When the distance between the upper gear case and the ceiling is extremely small due to the installation condition of the hoist in the above, the lifting device cannot be arranged above the upper gear case. Even if it can be arranged, the upper gear case may not be able to be attached or detached because there is no hanging allowance to move to a position that does not overlap the worm wheel in the height direction. In this case, work to punch the ceiling to secure the lifting allowance and remove the rubber vibration insulator attached between the hoist and machine beam, or move the entire hoist, but the work time will be longer. Recovery costs also increase.

[0005] It is an object of the present invention to provide an elevator in which the upper gear case can be easily attached and detached without an additional operation for punching the ceiling even when the distance between the upper gear case and the ceiling is extremely small. An object of the present invention is to provide a method of attaching and detaching a gear case on a hoisting machine.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an upper gear case for an elevator hoisting machine in which a gear case housing a worm shaft driven by a prime mover and a worm wheel is divided into upper and lower parts. In the desorption method of the above, a lifting device is provided in which a rod-shaped member arranged so as to be substantially parallel to the axis of the worm wheel at the upper part of the upper gear case is movable parallel to the axis of the worm wheel. On one side, a chain block is provided in which the lifting rope attached to the upper gear case is connected via the upper surface of the rod-shaped member, and another chain block connected to the upper gear case is provided on the other side of the rod-shaped member. Removing the upper gear case while controlling the movement of the upper gear case by the movement of each chain block and the rod-shaped member And it said that there was Unishi.

As described above, in the method of detaching and mounting the upper gear case of the elevator hoist according to the present invention, a lifting device having a rod-like member movable in parallel with the axis of the worm wheel is provided, and the lifting device is provided. Set the chain block on the left and right of
The chain block on one side is connected to the upper gear case by a lifting rope provided via a rod-shaped member of the lifting device, and the chain block on the other side is also connected to the upper gear case,
Since the upper gear case is controlled and removed by moving these chain blocks and the lifting device, even if the distance between the upper gear case and the ceiling is extremely small, the elevator winding can be performed without additional work such as punching out the ceiling. The upper gear case of the upper machine can be easily attached and detached.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a front view of the hoist to which the method of attaching and detaching the upper gear case of the elevator hoist according to the embodiment of the present invention is applied. A worm shaft 2 is attached to a power shaft 2a of the prime mover 1 via a brake drum 4.
When the brake device 12 operates, the brake lever 12
The rotation of the power shaft 2a and the worm shaft 2b of the prime mover 1 is mechanically stopped by the brake drum 4 via a. The worm shaft 2 is engaged with a worm wheel 3, and the worm wheel 3 is mounted on a sheave shaft 6 of a sheave 5 and housed in a vertically divided gear case 8. The prime mover 1 is mounted on a support plate 7 mounted on a gear case 8, and the entire hoist is mounted on a machine beam 10 via an anti-vibration rubber 9. The machine beam 10 is provided with a beam pulley 11 for guiding the main rope 14 wound around the sheave 5 to come and go. On the other hand, on the ceiling above the hoist, a strength member 13 made of I-steel parallel to the power shaft 2a and the worm shaft 2b is provided.
a, 13b pass at a predetermined interval, and the hoisting machine is located at a lower portion substantially in the middle of the strength members 13a, 13b. The wiring of the motor 1 is laid and protected by a cable pipe 15.

FIG. 6 is a flowchart showing a procedure of a method of detaching and mounting a gear case on an elevator hoist according to an embodiment of the present invention. First, in step S1, a chain block mounting base is mounted. As shown in the front view of FIG. 1, these are two strength members 13 parallel to the worm shaft 2.
The chain block mounting tables 16a and 16b are attached to the a and 13b, respectively, as shown in FIG.
As shown in the perspective view, a chain block mounting table 16a is attached so as to sandwich the lower bottom of the strength member 13a. Although not shown, the chain block mounting table 16b is similarly mounted on the opposing strength member 13b. Installed.

Next, in step S2, the lifting device is mounted. As shown in FIG. 1, both ends of the rod-shaped member 17a are connected to the strength members 13a, 13a so as to be parallel to the sheave shaft 6.
The lifting device 17 is supported between the members 3b and is movable in the longitudinal direction of the strength members 13a and 13b. FIG. 4 is a perspective view showing an end support structure of the lifting device 17. A guide member 17b that can move in the longitudinal direction is fitted between the vertically projecting portions of the pair of opposed strength members 13a, 13b, and a square-shaped welding member is fixed to the projection of the guide member 17b by welding to the end of the rod-shaped member 17a. After applying the steel plate 17d, a rectangular steel plate 17c is inserted into the gap between the guide member 17b and the steel plate 17d, and these are fixed with bolts 17e. For this fixation, mounting holes for bolts 17e are drilled at the same position in the steel plates 17c and 17d, and screw holes are drilled at the same position in the guide member 17b. Although both ends of the rod-shaped member 17a can have various configurations, the rod-shaped member 17a is provided between a pair of opposed strength members 13a and 13b.
By selecting the axial length of a, it is possible to make it possible to easily move in the longitudinal direction while preventing falling off. Further, rolling means may be added to the guide member 17b for smooth movement.

In the following step S3, a chain block is mounted. The chain blocks 18a and 18b are respectively set on the chain block setting tables 16a and 16b mounted in the previous step S1. Next, step S4
To install the wire rope, and to install the chain block in step S5. As shown in FIG. 1, the wire rope 19 is wound around a machine beam 10 located at an arbitrary position, for example, a rope end portion 23 holding an end of the main rope 14, and fixed. Is performed, and the chain block 20 is set on the wire rope 19 in step S5.

Thereafter, a connecting operation for hanging the upper gear case is performed. As shown in FIG. 3 which is an enlarged perspective view seen from the back surface, in the upper gear case 8a constituting the gear case 8 in step S6, two holes 80a and 80b provided for fixing to the lower gear case 8b are formed. The wire ropes 24a and 24b are respectively passed through and connected by the shackle 21, and in step S7, the shackle 21 is connected to one end of the wire rope 22 which is the lifting rope shown in FIG. Wire rope 2
2 is fixed to the chain block 20 previously installed. In step S8, another one of the wire ropes 25a and 25b is passed through the holes 80a and 80b of the upper gear case 8a through the wire ropes 24a and 24b, respectively.
The respective wire ropes 25a, 25b are slung on the hooks of the chain blocks 18a, 18b set on the chain block setting tables 16a, 16b. Therefore, in the upper gear case 8a, each chain block 18a, 18b,
20 allows force to be applied in three directions.

Next, the operation of suspending and moving the upper gear case is performed. That is, in step S9, the chain block setting table 1
Chain blocks 18a, 18 installed on 6a, 16b
The upper gear case 8a is moved by winding up the b. FIG.
FIG. 9 is a view seen from the back surface showing a state of movement when removing the upper gear case 8a, and shows the chain blocks 18a, 1;
The upper gear case 8a is lifted and moved as indicated by the arrow A by the winding up of 8b. When the upper gear case 8a moves to some extent, the upper gear case 8a slides down rapidly in the direction of arrow B due to its own weight. Remove the wheel 3 while removing it. At this time, the chain block 20 is used for preventing the upper gear case 8a from skidding, and the chain blocks 18a and 18b are used for moving the upper gear case 8a in the vertical direction.
As shown in a perspective view from the back of FIG. 3, the lifting device 17 is moved while moving away from the prime mover 1 between the strength members 13a and 13b. In this manner, the upper gear case 8a and the lower gear case 8b are separated, and the removed upper gear case 8a is temporarily placed at a position where it does not hinder the maintenance work, thereby completing the work of removing the upper gear case 8a. Then, step S
After carrying out the maintenance work in the gear case in step 10,
At 11, the upper gear case 8a is attached to the lower gear case 8b by performing the steps S1 to S9 in reverse order, and the lifting device 17 is removed.

As described above, even when the distance between the upper gear case 8a and the ceiling is extremely small, the three chain blocks 18a, 18b, 2 distributed to both ends of the rod-like member 17a.
The upper gear case 8a is removed while the upper gear case 8a is controlled by using the 0, so that an additional operation of punching out the ceiling is not required, and the anti-vibration rubber attached between the hoisting machine and the machine beam 10 is used. There is no need to secure the space by removing 9 or to move the hoist together, so that the work can be easily performed, and the work time is not increased and the burden of recovery costs is not increased. Further, since the rod-shaped member 17a is supported via the movable guide member 17b with a strength member provided on the ceiling, the configuration of the lifting device 17 is simplified.

In the flowchart of FIG. 6 showing the above-mentioned operation, steps S7 to S10 cannot be changed as a procedure, but steps S1 to S6 are performed in any order without any problem.

[0016]

As described above, in the method of detaching and mounting the upper gear case of the elevator hoist according to the present invention, a lifting device having a rod-shaped member movable in the axial direction of the prime mover is provided. Chain blocks are installed on the left and right, one chain block is connected to the upper gear case by a lifting rope provided via a rod-shaped member of the lifting device, and the other chain block is also connected to the upper gear case. The upper gear case is removed while controlling the upper gear case by moving the chain block and the lifting device, so even if the distance between the upper gear case and the ceiling is extremely small, the elevator hoisting machine does not require additional work such as punching out the ceiling. The upper gear case can be easily attached and detached.

[Brief description of the drawings]

FIG. 1 is a front view of a hoist showing a state in the middle of an operation employing a method of attaching and detaching an upper gear case of an elevator hoist according to an embodiment of the present invention.

FIG. 2 is a front view of the hoist to which the method of attaching and detaching the upper gear case of the elevator hoist according to the embodiment of the present invention is applied.

FIG. 3 is an enlarged perspective view showing a main part of the hoist shown in FIG. 1;

FIG. 4 is an enlarged perspective view showing another main part of the hoist shown in FIG. 1;

FIG. 5 is a front view showing a state of movement of the upper gear case shown in FIG. 3;

FIG. 6 is a flowchart showing an operation procedure by a method of attaching and detaching an upper gear case of an elevator hoist according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 motor 2 worm shaft 3 worm wheel 6 sheave shaft 8 gear case 8a upper gear case 17 lifting device 17a rod-shaped member 18, 18a, 20 chain block 22 wire rope

Claims (3)

[Claims] In a method of detaching an upper gear case of an elevator hoist, wherein a worm shaft driven by a prime mover and a gear case accommodating a worm wheel are divided into upper and lower parts, a shaft of the worm wheel is provided at an upper part of the upper gear case. A lifting device is provided in which a rod-shaped member arranged to be substantially parallel can move in parallel to the axis of the worm wheel, and a lifting rope attached to the upper gear case is provided on one side of the rod-shaped member. A chain block connected via the upper surface of the rod-shaped member is provided, and another chain block connected to the upper gear case is provided on the other side of the rod-shaped member. The movement of each of the chain blocks and the rod-shaped member moves the upper gear case. Wherein the upper gear case is removed while controlling the operation of the elevator gear. Method of desorption. 2. The bar-shaped member according to claim 1, wherein the rod-shaped member is disposed between a pair of strength members provided on a ceiling so as to be substantially orthogonal to an axis of the worm wheel, and both ends of the bar-shaped member are each of the strength members. A method of attaching / detaching a gear case on an elevator hoist, wherein the guide member is connected to guide members movably arranged in the longitudinal direction of the strength member between upper and lower projecting portions of the member. 3. A method according to claim 2, wherein said another chain block disposed on the other side of said rod-shaped member is fixed to said strength member.