JP5050741B2 - How to upgrade existing elevators - Google Patents

Description

The present invention relates to a repair method of existing elevator retrofitting an existing hydraulic elevator hoisting drum type.

  FIG. 3 is an overall configuration diagram showing a conventionally used hydraulic elevator apparatus. In FIG. 3, reference numeral 1 denotes a car that moves up and down in the elevator hoistway 2, 3 denotes a car guide rail standing in the hoistway 2, 4 denotes a shock absorber provided below the car 1, and 5 denotes a hoistway 2. It is a shock absorber stand that is provided on the bottom surface of the pit and supports the lower end portion of the car guide rail 3 and the shock absorber 4. Reference numeral 6 denotes a hydraulic power unit including a driving device for the car 1, 7 denotes a control device that controls the entire elevator such as control of the hydraulic power unit 6, 8 denotes a hydraulic jack cylinder installed in the hoistway 2, and 9 denotes A plunger 10 of a hydraulic jack that moves in the vertical direction with respect to the cylinder 8 is a sheave rotatably provided at the upper end of the plunger 9.

  The main rope 11 is connected to the fixed body of the hoistway 2 and the car 1 with the intermediate portion wound around the sheave 10. Specifically, one end of the main rope 11 is elastically connected to a support base 12 that is provided in a pit of the hoistway 2 and supports a hydraulic jack. Further, the main rope 11 is disposed upward from one end portion, and the intermediate portion is folded downward by being wound around the rope groove of the sheave 10. Then, the other end of the main rope 11 is connected to the fixed body of the car 1 from above.

  In the hydraulic elevator apparatus having the above configuration, the main rope 11 is moved by moving the plunger 9 of the hydraulic jack up and down by the hydraulic power unit 6, that is, by moving up and down the sheave 10 around which the main rope 11 is wound. The car 1 is moved up and down. However, such a hydraulic elevator device has problems such as a large hydraulic power unit 6 serving as a drive device, requiring a large installation space, and difficult handling of hydraulic oil. It is rarely used in elevator devices.

  Thus, as a conventional technique, a method of refurbishing an existing hydraulic elevator device to a currently mainstream rope-type machine room-less elevator device has been proposed (see, for example, Patent Document 1). In the refurbishment method described in Patent Document 1, by implementing various processes such as installation of a thin hoisting machine in a hoistway, installation of a guide rail for a counterweight, installation of a counterweight, and connection of a main rope, Renewal from hydraulic elevator equipment to the latest machine room-less elevator equipment has been realized.

JP 2007-39224 A

  In the thing of patent document 1, there were many processes for repairing a hydraulic elevator apparatus, and there existed a problem that the expense and period for repair became large. In particular, in a building equipped with only one elevator apparatus, the elevator apparatus cannot be used during the renovation period, so that the refurbishment period becomes a serious problem.

The present invention has been made to solve the above-described problems, and its purpose is to renovate an existing elevator that can significantly reduce the cost and time required to renovate an existing hydraulic elevator apparatus. Is to provide a method.

The method of repairing an existing elevator according to the present invention includes a main rope having one end connected to a hoistway fixing body and the other end connected to an elevator car, and a sheave around which an intermediate portion of the main rope is wound. An existing hydraulic elevator comprising a hydraulic jack to be supported, a sheave support portion that rotatably supports the sheave, and guide rails that are provided on both sides of the sheave and guide the elevating direction of the sheave This is a method of refurbishing existing elevators, and operates the emergency stop device to stop the car in the hoistway so that the worker can work at the height of the upper end of the cylinder of the hydraulic jack. And after stopping the car by operating the emergency stop device, raising the plunger of the hydraulic jack, placing the sheave at a predetermined height, and placing the sheave at a predetermined height, Plunger to cylinder Fixing and restraining the vertical movement of the plunger relative to the cylinder; operating the emergency stop device to stop the car; then removing the main rope; in the hoistway; And a step of newly installing a control device for controlling the hoisting machine, a step of connecting the new main rope between the newly installed hoisting machine and the car with the intermediate portion wound around the sheave, and the sheave And a step of fixing the sheave support portion to the guide rail .

  According to the present invention, it is possible to significantly reduce the cost and time required for repairing an existing hydraulic elevator apparatus.

  In order to explain the present invention in more detail, it will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram showing an elevator apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a detailed view of a main part of the elevator apparatus according to Embodiment 1 of the present invention. 1 shows an elevator apparatus obtained by refurbishing the existing hydraulic elevator apparatus shown in FIG. 3, and FIG. 2 shows a portion A of FIG. Hereinafter, a method for modifying the hydraulic elevator apparatus shown in FIG. 3 to the winding cylinder type elevator apparatus shown in FIG. 1 will be described in detail with reference to FIGS.

  In the modification of the existing hydraulic elevator device, the elevator operator first operates the emergency stop device 13 so that the work can be performed at the height of the upper end portion (packing portion) of the cylinder 8 of the hydraulic jack, The car 1 is fixed to a predetermined height of the car guide rail 3. The emergency stop device 13 is a safety device that is always provided in the elevator, and usually has a function of detecting the relaxation of the main rope 11 and stopping the car 1 in the hoistway 2 in an emergency manner. . Thereafter, the worker enters the pit of the hoistway 2, removes one end of the main rope 11 from the support base 12, and short-circuits a safety circuit (not shown).

  After operating the emergency stop device 13 to stop the car 1 in the hoistway 2, the worker moves the plunger 9 of the hydraulic jack upward by operating the hydraulic power unit 6, Place at the top of the movable range. After placing the sheave 10 at the predetermined height, the operator fixes the plunger 9 to the cylinder 8 and restrains the vertical movement of the plunger 9 relative to the cylinder 8. FIG. 2 shows an enlarged view of the packing portion of the cylinder 8 and shows a state where the fixing operation of the plunger 9 is completed.

  That is, when the plunger 9 is fixed, the operator first forms the through-hole 14 horizontally at a position slightly above the upper surface of the cylinder 8 in the plunger 9. Next, an L-shaped fixing bracket 15 is applied to the upper surface of the cylinder 8 and the side surface of the plunger 9 from both sides of the plunger 9 and is fixed to the upper surface of the cylinder 8 using bolts 16 or the like. Note that a through hole is formed in the fixing bracket 15 in an upright portion 15 a that faces the side surface of the plunger 9. An operator arranges the fixture 15 so that the through hole of the fixture 15 and the through hole 14 formed in the plunger 9 are in a straight line. Then, a pin 17 is inserted into the through hole of each fixing bracket 15 and the through hole 14 of the plunger 9, and the pin 17 is fixed to the fixing bracket 15.

  After the fixing operation of the plunger 9 is completed, the operator next performs a recovery operation of the hydraulic oil used in the hydraulic elevator device. Specifically, first, the stop valve disposed in the machine room is fully closed to block the movement of the hydraulic oil between the hydraulic power unit 6 and the hydraulic jack. Then, all the hydraulic oil in the hydraulic jack and the hydraulic oil in the hydraulic power unit 6 (machine room oil tank) are extracted, and the hydraulic power unit 6 and the control device 7 are removed from the machine room.

  After the removal of the existing equipment that is no longer necessary, the worker then installs the new equipment. Specifically, a control device 20 for controlling the hoisting machine 18, the deflector 19, and the hoist 18 is newly installed in the hoistway 2. Note that existing hydraulic elevator apparatuses often do not have a sufficient installation location for the new equipment in the hoistway 2. In such a case, the hoisting machine 18 and the control device 20 are installed, for example, in the pit of the hoistway 2 where the installation space can be relatively easily secured. In addition, as the winder type hoisting machine 18, by adopting a horizontal type in which the rotation axis of the wind drum is oriented in the vertical direction, the installation space (especially in the height direction) of new equipment is further suppressed. It becomes possible to do. The main rope 11 used in the hydraulic elevator apparatus is generally arranged in the vertical direction. Accordingly, when a horizontal type hoisting type hoisting machine 18 is newly installed, a deflecting wheel 19 for changing the direction of the newly installed main rope in the horizontal direction is matched with the main rope winding position and direction of the hoisting machine 18. Need to be placed properly. In the elevator apparatus shown in FIG. 1, the case where the baffle 19 is supported by the shock absorber base 5 or the support base 12 is shown.

  After the installation of the new equipment is completed, the operator removes the existing main rope 11 and connects the new main rope 21 between the car 1 and the hoisting machine 18. Specifically, both ends of the main rope 21 are hung down in a state where the intermediate portion of the main rope 21 is wound around the sheave 10, and one end is connected to a portion where the main rope 11 of the car 1 is connected. Further, after the main rope 21 is swung around the vehicle 19 and turned in the horizontal direction, the other end is connected to the hoisting machine 18. Finally, the control cable 22 is connected to the control device 20.

  According to the first embodiment of the present invention, when an existing hydraulic elevator apparatus is modified and renewed, the cost and time required for the modification can be greatly reduced. In other words, by refurbishing the elevator apparatus to a winding drum type, installation of a counterweight, installation of a counterweight guide rail, and the like are not required, and labor and time required for the renovation can be greatly reduced. Further, by fixing the plunger 9 with the sheave 10 placed at the top, the car 1 can be lifted and lowered using the sheave 10 after the repair, and the work of removing the hydraulic jack or the like is not necessary.

  In the fixing operation of the plunger 9, the upper side of the plunger 9 may be fixed to the fixed body of the hoistway 2 after the car 1 can be moved up and down. A sheave support portion 23 that rotatably supports the sheave 10 is provided at the upper end of the plunger 9. In the hydraulic elevator apparatus, guide rails 24 for guiding the sheave 10 in the up-and-down direction are provided on both sides of the sheave 10. Since the construction, dimensions, etc. of the sheave support portion 23 and the guide rail 24 are already known, after the sheave 10 is arranged at a predetermined height, suitable fixing means prepared in advance (for example, fixing metal, bolts, etc.) ) To fix the sheave support portion 23 to the guide rail 24, the work period can be shortened and the fixing operation can be easily performed.

1 is an overall configuration diagram illustrating an elevator apparatus according to Embodiment 1 of the present invention. It is a principal part detail drawing of the elevator apparatus in Embodiment 1 of this invention. It is a whole lineblock diagram showing the hydraulic elevator device used conventionally.

Explanation of symbols

1 car, 2 hoistway, 3 guide rail for car, 4 shock absorber,
5 shock absorber stand, 6 hydraulic power unit, 7 control device, 8 cylinder,
9 Plunger, 10 Sheave, 11 Main rope, 12 Support base,
13 Emergency stop device, 14 Through hole, 15 Fixing bracket, 15a Upright part,
16 bolt, 17 pin, 18 hoisting machine, 19 baffle,
20 control device, 21 main rope, 22 control cable, 23 sheave support,
24 guide rail

Claims (4)

A main rope having one end connected to the hoistway fixing body and the other end connected to the elevator car;
A hydraulic jack that moves up and down a sheave on which an intermediate portion of the main rope is wound;
A sheave support that rotatably supports the sheave;
Guide rails provided on both sides of the sheave, for guiding the elevating direction of the sheave,
A method of repairing an existing elevator that repairs an existing hydraulic elevator equipped with
Operating an emergency stop device to stop the car in the hoistway so that an operator can work at the height of the upper end of the cylinder of the hydraulic jack; and
After the emergency stop device is operated to stop the car, the plunger of the hydraulic jack is raised, and the sheave is disposed at a predetermined height; and
After placing the sheave at the predetermined height, fixing the plunger to the cylinder and restraining the vertical movement of the plunger relative to the cylinder;
Removing the main rope after operating the emergency stop device to stop the car;
In the hoistway, a step of newly installing a hoisting type hoisting machine and a control device for controlling the hoisting machine;
A step of connecting a new main rope in a state where an intermediate part is wound around the sheave between the newly established hoisting machine and the car;
After arranging the sheave at the predetermined height, fixing the sheave support to the guide rail;
A method of repairing an existing elevator characterized by comprising Existing hydraulic elevators
A support base provided in the pit of the hoistway and supporting the hydraulic jack;
Further comprising
A step of newly installing a hoisting type hoisting machine in the pit of the hoistway so that the rotation axis of the hoisting cylinder is in a vertical direction;
A step of turning a main rope horizontally in the hoistway in accordance with the main rope winding position of the hoisting machine for turning the main rope in a horizontal direction, and supporting the step on the support base ;
The method for repairing an existing elevator according to claim 1, further comprising: Existing hydraulic elevators
A shock absorber provided below the cage;
A shock absorber stand provided in the pit of the hoistway and supporting the shock absorber;
Further comprising
A step of newly installing a hoisting type hoisting machine in the pit of the hoistway so that the rotation axis of the hoisting cylinder is in a vertical direction;
A step for turning a main rope horizontally in the hoistway according to the main rope winding position of the hoisting machine, and supporting it on the shock absorber table ;
The method for repairing an existing elevator according to claim 1, further comprising: After arranging the sheave at a predetermined height, extracting hydraulic oil in the hydraulic jack and the hydraulic power unit that drives the hydraulic jack, and removing the hydraulic power unit;
The method for repairing an existing elevator according to any one of claims 1 to 3 , further comprising:

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