JP2012158459A - Method of renewing hydraulic elevator into traction elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of renewing a hydraulic elevator into a traction elevator while making the most of the structure of the hydraulic elevator.SOLUTION: The method of renewing a hydraulic elevator into a traction elevator, includes steps of: detaching a sheave 44 by lowering most a plunger 32 of a hydraulic jack 28; installing a counterweight 64 having a weight of twice the value obtained from a calculating formula which is used when finding a weight of a normal counterweight used for a normal traction elevator; installing a hoist 60 at a position higher than a position of an upper end of the plunger 32 when the plunger 32 is most raised while the hydraulic jack 28 is left; and connecting and fixing another side end of a rope 66 with a rope cleat 22, and connecting and fixing one side end of the rope 66 with a fixing portion 67 of a hoistway 12 via a counterweight suspension sheave 63 mounted on the counterweight 64.

Description

  The present invention relates to a method of renewing a hydraulic elevator to a slewing elevator, and more particularly, to a method of renewing a hydraulic elevator that lifts and lowers a car with a hydraulic type to a slidable elevator that lifts and lowers a car with a slidable type.

  In so-called low-rise condominiums and the like, hydraulic elevators that do not require a machine room above the hoistway are installed. However, the hydraulic elevator requires a large amount of power to raise the car because the weight of the car is directly applied to the hydraulic jack. That is, the hydraulic elevator consumes more electric power than the slidable elevator using a counterweight. On the other hand, as a slidable elevator, a machine room-less elevator in which a machine room does not protrude on a hoistway has been developed in recent years. For this reason, the slidable elevator has been widely used in condominiums having a low-rise structure instead of the hydraulic elevator. And even if it is a case where the hydraulic type elevator is already installed, this is renewed to a slat type elevator.

  As a technique related to the present invention, for example, Patent Document 1 includes a hydraulic jack cylinder and a plunger in a hoistway, and is attached to one end of a main rope wound around a return wheel fixed to the top of the plunger. The cab is fastened, the other end of the main rope is fastened to the cylinder side of the hydraulic jack, and the indirect hydraulic elevator that lifts and lowers the cab along with the raising and lowering of the plunger of the hydraulic jack is renewed to a rope type elevator. A method is disclosed.

  Here, a hoisting machine is installed at the upper part of the hoistway or at the upper end of the car guide rail, the hydraulic oil of the hydraulic jack is removed, the packing at the upper part of the cylinder of the hydraulic jack is removed, and the hydraulic jack is removed. A counterweight suspension wheel is installed on the top of the plunger, a counterweight that moves up and down integrally with the plunger of the hydraulic jack is installed, and a cab is attached to one end of the main rope wound around the sheave of the hoisting machine. It is disclosed that the counterweight and the plunger are suspended and held at the other end of the main rope via the counterweight suspension wheel.

JP 2010-116231 A

  By the way, since the hydraulic jack of a hydraulic elevator is very heavy, it has considerable labor for removal work. Therefore, it is desired to renew the crane elevator while utilizing the structure of the hydraulic elevator.

  An object of the present invention is to provide a method for renewing a slidable elevator while utilizing the structure of a hydraulic elevator.

  A trolley that is a member that can be moved up and down in the hoistway according to the present invention, one end is connected and fixed to the first fixing portion of the hoistway, and the other end is a member that supports the bottom surface of the car A first main rope connected and fixed to a section, a pulley section around which an intermediate portion of the first main rope is wound, and a standing space in the hoistway between the carriage and the inner wall of the hoistway. A hydraulic elevator comprising a hydraulic jack portion that raises and lowers the pulley portion along the jack rail, and a counterweight provided in the hoistway so as to be movable up and down, and a hoisting machine, A method of renewing a counterweight elevator in which the counterweight and the car are connected in a slippery manner by a second main rope wound around a hoisting machine, wherein the plunger of the hydraulic jack portion is lowered most. Remove the pulley section. A step of removing, a step of providing the counterweight having a weight twice as large as a value obtained from a calculation formula used for determining a weight of a normal counterweight used in a normal slidable elevator, and the hydraulic type The step of providing the hoisting machine at a position higher than the height position of the upper end when the plunger is raised most with the jack portion remaining, and the other end of the second main rope is attached to the rope And a step of connecting and fixing one end of the second main rope to the second fixing portion of the hoistway via a return wheel provided on the counterweight. .

  Further, in the method of renewing the hydraulic elevator according to the present invention into a slidable elevator, it is preferable to include a step of using the jack rail as a guide rail for guiding the lifting and lowering of the counterweight.

  Further, in the method of renewing the hydraulic elevator according to the present invention to a slewing elevator, it is preferable that the counterweight includes a step of forming a notch portion along the outer shape of the rope stop portion.

  Further, in the method of renewing the hydraulic elevator according to the present invention to a slidable elevator, it is preferable to provide a step of providing a buffer member corresponding to the counterweight at the upper end of the plunger.

  Further, in the method of renewing the hydraulic elevator according to the present invention into a slewing elevator, it is preferable to provide a step of providing a slewing control panel for controlling the hoisting machine using an empty space in the hoistway.

  Further, in the method of renewing the hydraulic elevator according to the present invention into a slidable elevator, an operation for flowing the hydraulic oil connected between the hydraulic oil tank portion in which the hydraulic oil is stored and the hydraulic jack portion is provided. It is preferable to provide a step of passing a power control line connecting the slidable type control panel and the hoisting machine in the oil pipe.

  Moreover, in the method of renewing the hydraulic elevator according to the present invention to a slewing elevator, it is preferable to include a step of using the first main rope as the second main rope.

  With the above configuration, the value obtained from the calculation formula used when the plunger of the hydraulic jack part is lowered most and the pulley part is removed, and the weight of the normal counterweight used in the ordinary slat type elevator is obtained. The step of providing a counterweight having a weight twice as large as the above and the hoisting machine at a position higher than the height position of the upper end when the plunger rises most with the hydraulic jack portion remaining. The process and the other end of the second main rope are connected and fixed to the rope stop, and one end of the second main rope is connected and fixed to the second fixing portion of the hoistway through a return wheel provided on the counterweight. A process. Thereby, it can renew to a slidable elevator, utilizing the structure of a hydraulic elevator.

In embodiment which concerns on this invention, it is a figure which shows schematic structure of the hydraulic elevator before performing renewal. In embodiment which concerns on this invention, it is a figure which shows schematic structure of the slewing type elevator after renewal was performed. In embodiment which concerns on this invention, it is a figure which shows the relationship between a counterweight and a jack rail. 5 is a flowchart showing a procedure for renewing a hydraulic elevator into a slidable elevator in the embodiment according to the present invention. In embodiment which concerns on this invention, it is a perspective view which shows schematic structure of the hydraulic elevator before performing renewal.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Also, in the following, in all the drawings, the same symbols are attached to the same elements, and the duplicate description is omitted. In the description in the text, the symbols described before are used as necessary.

  FIG. 1 is a diagram showing a schematic configuration of a hydraulic elevator 10 before renewal. FIG. 5 is a perspective view showing a schematic configuration of the hydraulic elevator 10 before renewal. The hydraulic elevator 10 has a car 14 that moves up and down in a hoistway 12 that is a space extending in a vertical direction in a building. The car 14 is provided with a car door 20 on a side wall portion facing a hall door 18 installed in the elevator hall 16 of the building.

  A plate-shaped or frame-shaped rope stopper 22 for supporting the car 14 is provided at the lower part of the car 14. For example, each end of a plurality of ropes 24 made of wire is connected and fixed to the rope stopper 22. In FIG. 1, the rope 24 is shown by a single solid line, but the plurality of ropes 24 are arranged side by side in the depth direction of FIG. 1.

  A hydraulic jack 28 is erected on the bottom 26 of the hoistway 12. The hydraulic jack 28 includes a cylindrical cylinder 30 and a plunger 32 whose lower end is inserted into the cylinder 30 and protrudes upward from the upper end of the cylinder 30.

  In addition, a hydraulic oil tank 36 that stores hydraulic oil, and hydraulic oil from the hydraulic oil tank 36 is supplied into the cylinder 30 at a high pressure to the bottom 26 of the hoistway 12 or the machine chamber 34 that is provided adjacent to the hoistway 12. A hydraulic oil pump 38 is installed. An oil supply solenoid valve 40 is disposed in a hydraulic oil pipe 39 that connects the hydraulic oil pump 38 and the lower portion of the cylinder 30. In addition, an oil discharge solenoid valve 42 is disposed in a hydraulic oil pipe 41 that is connected to the lower portion of the cylinder 30 and returns hydraulic oil discharged from the cylinder 30 to the hydraulic oil tank 36.

  A pulley 44 is rotatably attached to an upper end portion of the plunger 32 of the hydraulic jack 28, and the pulley 44 moves up and down along a jack rail 29 erected adjacent to the hydraulic jack 28.

  One end portion of the rope 24 is connected and fixed to the bottom portion 26 of the hoistway 12 via a rope elongation corrector 50, and is wound around the upper side of the pulley 44. Then, the other end is connected and fixed to the rope stopper 22 of the car 14. The rope elongation corrector 50 is an instrument for adjusting the elongation of the rope 24.

  In the machine room 34 (or the bottom 26 of the hoistway 12), a hydraulic control panel 52 is installed as a control means. The hydraulic control panel 52 has a function of executing overall control over the entire hydraulic elevator 10, and includes a CPU that executes a control program, a ROM that stores control programs and control parameter threshold values in advance, measurement data, and the like. It includes a RAM that can be temporarily stored and read out as needed.

  An oil amount sensor 54 is installed in the hydraulic oil tank 36. The oil amount sensor 54 is for detecting the oil amount in the hydraulic oil tank 36 by measuring the distance to the oil surface using infrared rays, ultrasonic waves or the like, and the detected value is the hydraulic control panel 52. To be sent to.

  Here, in the hydraulic elevator 10, the oil supply solenoid valve 40 is opened in a state where the oil discharge solenoid valve 42 is closed, and the hydraulic oil is pressurized from the hydraulic oil tank 36 into the cylinder 30 by the hydraulic oil pump 38. The plunger 32 is pushed upward by being fed in. As a result, the pulley 44 provided at the upper end of the plunger 32 moves upward, whereby the car 14 is pulled up via the rope 24 and moved upward. At this time, the moving amount of the car 14 is doubled with respect to the moving amount of the pulley 44, that is, the plunger 32 from the principle of the moving pulley.

  When the car 14 reaches the elevator hall 16 on the uppermost floor, the pressure receiving portion 33 at the lower end of the plunger 32 is substantially at the uppermost position in the cylinder 30. At this time, it is designed so that a margin for further pushing up the plunger 32 remains between the uppermost portion 31 in the cylinder 30 and the pressure receiving portion 33.

  On the other hand, when the car 14 moves downward, the oil discharge solenoid valve 42 is opened with the oil supply solenoid valve 40 closed. As a result, the plunger 32 is pushed down by the gravitational action caused by the weight of the car 14 or the like, so that the hydraulic oil in the cylinder 30 returns to the hydraulic oil tank 36 via the draining electromagnetic valve 42. Then, the opening degree of the oil draining electromagnetic valve 42 is gradually reduced to gradually reduce the descending speed of the car 14, and when the valve is completely closed, the descending movement of the plunger 32 and the car 14 is stopped. Land on the designated floor registered for the destination floor in the car.

  Next, the slidable elevator 11 after renewal will be described. FIG. 2 is a diagram illustrating a schematic configuration of the sliding elevator 11 after the renewal is performed. The difference between the elevator elevator 11 and the hydraulic elevator 10 includes a hoisting machine 60, a buffer member 62, a counterweight 64, a rope 66, a elevator control panel 68, and a power control line 70. Is a point.

  The hoisting machine 60 is a device for raising and lowering the car 14 by driving a rope 66 that is wound under the control of the slewing-type control panel 68. The hoisting machine 60 is higher than the upper end of the plunger 32 when the pressure receiving portion 33 at the lower end of the plunger 32 is substantially at the uppermost position in the cylinder 30 (higher than the height at which the pulley 44 was present). Position).

  The buffer member 62 is a buffer member provided to protect each element in the hoistway 12 in case the counterweight 64 should fall. The buffer member 62 is attached to the upper end portion of the plunger 32 instead of the pulley 44 in a state where the pressure receiving portion 33 at the lower end portion of the plunger 32 is at the lowest position in the cylinder 30.

  The counterweight 64 is a weight having a weight twice as large as a value obtained from a calculation formula used when determining the weight of a normal counterweight used in a normal lift elevator. Specifically, for example, when the weight of the car 14 is 500 kg, the weight per person is 60 kg, and 10 passengers are seating capacity, in the normal case, {the weight of the car 14 ( kg) + (weight per person (kg) × the number of passengers in the car 14)} ÷ 2. In the above example, {500 kg + (60 kg × 10)} ÷ 2 = 550 kg In this case, since it has twice the weight, the counterweight 64 has a weight of 1100 kg.

  Here, a specific configuration of the counterweight 64 will be described with reference to FIG. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and shows the relationship between the counterweight 64 and the jack rail 29. A return wheel 63 is provided on the upper surface of the counterweight 64. The end surfaces 602 and 604 of the counterweight 64 are provided with notches 602 a and 604 a having a shape along the outer shape of the jack rail 29. Thereby, the counterweight 64 is guided up and down by the jack rail 29. Further, the end surface 606 is provided with a notch 606 a having a shape along the outer shape of the rope stopper 22. Thereby, it is possible to prevent the counterweight 64 and the rope stopper 22 from colliding with each other when performing the lifting / lowering operation.

  Returning to FIG. 2 again, the rope 66 is a rope for suspending the car 14, and is wound around the hoisting machine 60. One end of the rope 66 is connected and fixed to the rope stopper 22, and the other end is a fixing portion 67 (near the lower part of the hoisting machine 60) provided on the inner wall of the hoistway 12 via the return wheel 63 of the counterweight 64. Are fixedly connected to a fixing member).

  The vine-type control panel 68 has a function of executing overall control over the entire vine-type elevator 11 including control of the hoisting machine 60, and includes a CPU that executes a control program, a control program, a control parameter threshold value, and the like. It is configured to include a ROM that is stored in advance, a RAM that can temporarily store measurement data and the like, and that can be read out as needed.

  The power control line 70 is a cable for connecting the slat type control panel 68 and the power receiving panel 71. Here, a part of the hydraulic oil pipe 39 provided to connect the hydraulic oil pump 38 and the lower part of the cylinder 30 is used, and the power control line 70 uses the inside of the hydraulic oil pipe 39 as a wiring path. Has been passed.

  Next, a method for renewing the hydraulic elevator 10 to the slidable elevator 11 will be described. FIG. 4 is a flowchart showing a procedure for renewing the hydraulic elevator 10 to the slewing elevator 11.

  First, the pressure receiving portion 33 at the lower end of the plunger 32 is set to the lowest position in the cylinder 30, and the hydraulic elevator 10 is stopped (the hydraulic control panel 52 of the hydraulic control panel 52 is moved after the car 14 is moved to the lowest floor). The power is also turned off), and the car 14 is fixed so as not to descend using fixing means (not shown) (S10).

  Next, after removing one end of the rope 24 from the rope stopper 22 and the other end from the rope stretcher 50, the pulley 44 is removed from the upper end of the plunger 32 (S12).

  And the buffer member 62 is attached to the upper end part of the plunger 32 after the pulley 44 is removed (S14).

  Next, the notches 602a and 604a having a shape along the outer shape of the jack rail 29 and the notches 606a having a shape along the outer shape of the rope stopper 22 are formed, and the ordinary used in a normal lift type elevator. The counterweight 64 manufactured so as to have a weight twice as large as the value obtained from the calculation formula used when determining the weight of the counterweight is installed between the jack rails 29 (S16).

  Thereafter, with the cylinder 30 and the plunger 32 left, the coil 32 is wound to a position higher than the height position of the upper end portion of the plunger 32 when the pressure receiving portion 33 at the lower end portion of the plunger 32 is substantially at the uppermost position in the cylinder 30. The upper unit 60 is installed (S18).

  Then, the rope 66 is prepared, and one end thereof is connected and fixed to the fixing portion 67 provided on the inner wall of the hoistway 12 via the return wheel 63, and the other end is connected and fixed to the rope stopper 22 (S20).

  Next, a slip-type control panel 68 for controlling the hoisting machine 60 is arranged using the empty space in the hoistway 12 and the machine room 34 (S22).

  Thereafter, the hydraulic oil tank 36, the hydraulic oil pump 38, the oil supply solenoid valve 40, the oil discharge solenoid valve 42, and the hydraulic oil pipe 41 are removed while leaving a part of the hydraulic oil pipe 39, and the power control line 70 is removed. Is passed through the remaining hydraulic oil piping 39, and the slat-type control panel 68 and the power receiving panel 71 are further connected using the power control line 70 (S24).

  The fixing means used in S14 is removed, the power source of the slidable control panel 68 is turned on, and the operation of the slidable elevator 11 is started (S26).

  As described above, by replacing the hydraulic elevator 10 with the slewing elevator 11, it is possible to renew the cylinder 30 and the plunger 32, leaving the elements that are very heavy and difficult to remove. Can finish.

  In addition, as described above, the jack rail 29 can be used as a guide rail for the counterweight 64 by replacing the hydraulic elevator 10 with the slidable elevator 11, and the structure of the hydraulic elevator 10 can be utilized. it can.

  In the above description, the rope 24 and the rope 66 have been described as different ropes. However, if the rope can be used with a hydraulic hanging type, the rope 24 used with the hydraulic type is wound around the hoisting machine 60 and the hanging type. May be used. That is, the rope 24 and the rope 66 can be shared.

  DESCRIPTION OF SYMBOLS 10 Hydraulic elevator, 11 Rail type elevator, 12 Hoistway, 16 Elevator landing, 18 landing door, 20 Car door, 22 Tail stop, 24 Rope, 26 Bottom 28 Hydraulic jack, 29 Jack rail, 30 Cylinder, 31 Top part, 32 plunger, 33 pressure receiving part, 34 machine room, 36 hydraulic oil tank, 36 hydraulic oil tank, 38 hydraulic oil pump, 39, 41 piping, 40 oil supply solenoid valve, 42 oil discharge solenoid valve, 44 pulley, 50 Rope Elongation Compensator, 52 Hydraulic Control Panel, 54 Oil Level Sensor, 60 Hoisting Machine, 62 Shock Absorber, 63 Return Wheel, 64 Counterweight, 66 Rope, 68 Rail Type Control Panel, 70 Power Control Line 71 Power receiving panel.

Claims (7)

Each of the cars provided in the hoistway so as to be able to move up and down, one end is connected and fixed to the first fixing part of the hoistway, and the other end is connected and fixed to the rope stop that is a member that supports the bottom surface of the car A jack rail installed in a space between the first main rope, the pulley portion around which the intermediate portion of the first main rope is wound, and the inner wall of the hoistway in the hoistway. And a hydraulic jack part for raising and lowering the pulley part, and a hydraulic elevator comprising:
The counterweight includes a counterweight provided in the hoistway so as to be movable up and down, and a hoisting machine, and the counterweight and the ride car are connected to each other by a second main rope wound around the hoisting machine. It is a method of renewal to a smooth vine elevator
Removing the pulley part by lowering the plunger of the hydraulic jack part most;
A step of providing the counterweight having a weight twice as large as a value obtained from a calculation formula used when determining the weight of a normal counterweight used in a normal slat type elevator;
The step of providing the hoisting machine at a position higher than the height position of the upper end when the plunger is raised most with the hydraulic jack portion remaining;
The other end of the second main rope is connected and fixed to the rope stopper, and one end of the second main rope is connected to the second fixing portion of the hoistway via a return wheel provided on the counterweight. Fixing, and
A method of renewing a hydraulic elevator to a slewing elevator, comprising: In the method of renewing the hydraulic elevator according to claim 1 to a rail type elevator,
A method of renewing a hydraulic elevator to a slewing elevator, comprising the step of using the jack rail as a guide rail for guiding the lifting and lowering of the counterweight. In the method of renewing the hydraulic elevator according to claim 2 to a rail type elevator,
A method for renewing a hydraulic elevator into a slat-type elevator, comprising the step of forming a notch along the outer shape of the rope stopper in the counterweight. In the method of renewing the hydraulic elevator according to any one of claims 1 to 3 to a slewing elevator,
A method of renewing a hydraulic elevator to a slat-type elevator, comprising a step of providing a buffer member corresponding to the counterweight at an upper end portion of the plunger. In the method of renewing the hydraulic elevator according to any one of claims 1 to 4 to a slewing elevator,
A method for renewing a hydraulic elevator to a slewing elevator, comprising the step of providing a slidable control panel for controlling the hoisting machine using an empty space in the hoistway. In the method of renewing the hydraulic elevator according to claim 5 to a rail type elevator,
The hydraulic control pipe and the hoisting machine are connected between the hydraulic oil tank section in which the hydraulic oil is stored and the hydraulic jack section connected to the hydraulic oil pipe for flowing the hydraulic oil. A method of renewing a hydraulic elevator into a slewing elevator, comprising the step of passing a power control line connecting the two. In the method of renewing the hydraulic elevator according to any one of claims 1 to 6 to a slidable elevator,
A method of renewing a hydraulic elevator into a slewing elevator, comprising the step of using the first main rope as the second main rope.

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