JP5094075B2 - How to renew an elevator - Google Patents

Description

  The present invention relates to a method for renewing an elevator using a new hoisting machine in place of an existing hoisting machine installed in a machine room.

  Conventionally, a large hoisting machine having a worm-type or helical-type reduction gear mechanism is installed in an elevator machine room and used as a drive source for the elevator. The hoisting machine is installed on a machine bed installed in the machine room, a main rope is wound around the traction sheave of the hoisting machine, and a car and a counterweight are placed in the hoistway through the main rope. A deflecting sheave is provided in the vicinity of the hoisting machine for deflecting the pulling position of the main rope.

  Worm type and helical type hoisting machines are large in size because they have a reduction gear mechanism, and occupy the machine room widely. For this reason, when renewing to use a new type of hoisting machine instead of the existing hoisting machine, the existing hoisting machine, machine bed, and deflector sheave are disassembled and removed from the machine room. Thereafter, a new hoisting machine is carried into the machine room and installed at a predetermined position.

  In this case, it takes a lot of time and labor to disassemble and remove the existing hoisting machine, and since the new hoisting machine is also large, it takes a lot of time and labor to secure the carrying-in route and carry-in work. It has become. For this reason, the renewal work period is prolonged and the cost is increased.

Therefore, in Japanese Patent Application Laid-Open No. 2005-126166, a small thin hoisting machine is used as a new hoisting machine, the existing hoisting machine in the machine room is left without being disassembled, and a new thin hoisting machine is installed. A technology is disclosed that is installed in a machine room side by side with a hoisting machine to realize efficient renewal.
JP 2005-126166 A

  The new hoist shown in JP-A-2005-126166 has a thin structure in which the length in the direction perpendicular to the rotation axis is larger than the length in the direction of the rotation axis. This thin-type hoisting machine is installed in the machine room so that the rotating shaft faces the horizontal direction and the whole stands upright.

  In the machine room, a machine bed for installing the hoisting machine is provided horizontally. This machine bed is configured by combining a plurality of beam members. Such a machine bed has a spread in the plane direction, but hardly spreads in the vertical direction. Therefore, in order to install a thin hoisting machine on this machine bed, a beam member is added and mounted vertically on the machine bed, and the hoisting machine is installed on the vertical beam member. For this reason, the vertical beam material must be added, the construction period is extended, material costs and work costs are increased, and the cost increases.

  The present invention has been made paying attention to such points, and its purpose is to leave the existing hoisting machine in the machine room as it is and to provide a machine bed for installation of the existing hoisting machine. An object of the present invention is to provide an elevator renewal method that can be used as it is and a new small hoisting machine can be installed to renew an elevator drive system efficiently and at low cost in a short construction period.

In the invention of claim 1, the elevator is driven using a new hoisting machine instead of the existing hoisting machine installed on the machine bed provided in the machine room above the hoistway. This is a renewal method in which a traction sheave is attached to the rotating shaft of a cylindrical motor to form a new hoisting machine, and this new hoisting machine is installed on the machine bed in the machine room. Install in the empty space above the machine bed next to the hoisting machine and hang the main rope that suspends the car and the balance weight in the hoistway around the traction sheave of the new hoisting machine. The car and the counterweight are driven by an upper machine.

  The invention of claim 2 is a method of suspending a car and a balance weight with a main rope. From a 1: 1 roping method in the case of using the existing hoisting machine to a 2: 1 roping in the case of using the new hoisting machine. It is characterized by changing to a method.

  The invention of claim 3 is a 2: 1 roping method in which a car sheave and a weight sheave are respectively attached to the car and the balance weight that have been driven by the existing hoisting machine. It is characterized by being suspended by.

  The invention of claim 4 is characterized in that the novel hoisting machine is of a type having no reduction gear mechanism for power transmission.

The invention of claim 5 is characterized in that the traction sheave of the new hoisting machine is directly attached to the rotating shaft of the new hoisting machine.

  According to the present invention, the existing hoisting machine in the machine room is left as it is, and a new small hoisting machine is installed by using the machine bed for installing the existing hoisting machine as it is to drive the elevator. The system can be renewed efficiently and at low cost in a short construction period.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view showing the overall configuration of the elevator before renewal. A large hoisting machine 3 having a reduction gear mechanism is installed in the machine room 2 above the hoistway 1. The machine room 2 includes a flooring 5, a machine bed 7 formed by combining a plurality of beam members 6 is provided on the flooring 5, and the hoisting machine 3 is installed on the machine bed 7.

  The hoisting machine 3 includes a traction sheave 10 that is rotationally driven, and a deflecting sheave 11 is rotatably attached to a side portion of the machine bed 7. A main rope 13 is wound around the traction sheave 10 of the hoisting machine 3, and one end side of the main rope 13 is directly pulled down into the hoistway 1, and the other end side is passed through the deflecting sheave 11 to enter the hoistway 1. Has been withdrawn. Then, the car 14 is connected to one end of the main rope 13 and the counterweight 15 is connected to the other end of the main rope 13, and the car 14 and the counterweight 15 are 1: 1 by the main rope 13. It is suspended in the hoistway 1 by the roping method.

  FIG. 2 shows the arrangement relationship of the car 14 and the counterweight 15 in plan view. The left side of the car 14 shown in FIG. 2 is the front surface and the right side is the back surface, and the counterweight 15 is arranged so as to pass through the back side of the car 14. The traction sheave 10 and the deflecting sheave 11 of the hoisting machine 3 are arranged along the longitudinal direction of the car 14.

  During the operation of the elevator, the hoisting machine 3 is activated and the traction sheave 10 is rotated. With this rotation, the main rope 13 travels in the length direction, and the car 14 and the counterweight 15 are reversed in the hoistway 1. Move up and down in the direction.

  When the elevator drive system is renewed, a cylindrical motor 20 shown in FIGS. 3 to 5 is used as a hoisting machine. The cylindrical motor 20 is a well-known motor used as a drive source for various devices including an elevator, and has a small and compact configuration in which a main body 21 extends in a cylindrical shape in the axial direction of a rotary shaft 22. Yes. A traction sheave 23 is directly attached to the rotary shaft 22 of the cylindrical motor 20 and used as a rewinding hoist 24.

  At the time of the renewal work, as shown in FIG. 6, the existing hoisting machine 3 installed in the machine room 2 is left as it is, and a space above the machine bed 7 on the side of the existing hoisting machine 3 is left. A new hoisting machine 24 for renewal is installed in the space. In other words, the existing hoisting machine 3 is left installed in the machine room 2 and a new renewal hoisting machine 24 is newly installed at a position where there is no interference in the vicinity thereof.

  The hoisting machine 24 is disposed on the machine bed 7 so that the main body 21 and the rotating shaft 22 of the cylindrical motor 20 are oriented in the horizontal direction, and is fastened and fixed to the machine bed 7 using fasteners such as bolts. The upper surface of the machine bed 7 has a certain spread, and therefore, the hoisting machine 24 can be easily installed without adding any beam material for installation in particular.

  After the hoisting machine 24 is installed on the machine bed 7, the main rope 13 is wound around the traction sheave 23 and both ends of the main rope 13 are pulled down into the hoistway 1. Then, the car 14 and the counterweight 15 are suspended in the hoistway 1 by the 2: 1 roping method between one terminal side and the other terminal side of the main rope 13. When pulling down the main rope 13, if the existing deflecting sheave 11 shown in FIG. 1 becomes an obstacle, the deflecting sheave 11 is removed.

  The traction sheave 23 of the newly installed hoisting machine 24 is directly attached to the rotating shaft 22 of the cylindrical motor 20, and the power is directly transmitted without passing through the reduction gear mechanism. Therefore, the driving torque is small. Therefore, the car 14 and the counterweight 15 are suspended and driven by a 2: 1 roping method.

  FIG. 7A shows the structure of the car 14 suspended by the 1: 1 roping method before renewal. The car 14 includes vertical frames 28 that are vertically spaced apart from each other, upper beams 29 and lower beams 30 that are installed between upper and lower ends of the vertical frames 28, and lower beams 30. A floor frame 31 installed on the top and a cab 32 installed on the floor frame 31 are configured. The end of one end side of the main rope 13 is connected to the upper beam 29 and is suspended in the hoistway 1 by the main rope 13.

  When the car 14 is renewed, the car 14 is modified as shown in FIG. 7B in order to be able to be suspended by the 2: 1 roping method. That is, a beam member 33 is attached horizontally below the upper beam 29, and a car sheave 34 is attached to both ends of the beam member 33 so as to be rotatable. Then, as shown in FIG. 6, the two car sheaves 34 pass through one terminal side of the main rope 13 pulled down from the traction sheave 23 of the new hoisting machine 24 so as to pass under the pair of car sheaves 34. And the terminal is connected and fixed to the hitch portion 35 of the machine room 2.

  Further, FIG. 8A shows a counterweight 15 before renewal, and the counterweight 15 is modified to a structure suitable for the 2: 1 roping method as shown in FIG. 8B. That is, the weight sheave 39 is rotatably attached to the upper end portion of the counterweight 15 via the bracket 38. Then, as shown in FIG. 6, the other end side of the main rope 13 pulled down from the traction sheave 23 of the newly installed hoisting machine 24 is wound around the lower side of the weight sheave 39 and lifted upward, It is connected and fixed to the hitch portion 40 of the machine room 2.

  As shown in FIG. 9, the car sheave 34 and the weight sheave 39 are arranged so as to be aligned along the front-rear direction of the car 14, and the car sheave 34 on the back side of the car 14 is balanced with the weight sheave 39 of the weight 15. It is set so that the traction sheave 23 of the newly installed hoisting machine 24 is disposed immediately above the balance, and the car 14 and the counterweight 15 are suspended by the 2: 1 roping method.

  By suspending the counterweight 14 and the counterweight 15 by the 2: 1 roping method in this way, the counterweight 14 and the counterweight 15 can be driven with approximately half the torque of the 1: 1 roping method. . Therefore, even if the drive torque of the newly installed hoisting machine 24 is small, it can sufficiently cope with it.

  The above embodiment is an example in which the counterweight 15 is arranged on the back side of the car 14, but the counterweight 15 is arranged on one side of the car 14 as shown in FIG. In this case, the car sheave 34 of the car 14 and the weight sheave 39 of the counterweight 15 are arranged obliquely as shown by the chain line in FIG. In other words, the car sheave 34 and the weight sheave 39 are arranged along a line that obliquely crosses the upper surfaces of the car 14 and the counterweight 15. Then, the hoisting machine 24 is disposed in a direction inclined with respect to the front-rear direction of the car 14, and the traction sheave of the hoisting machine 24 is directly above the car sheave 34 and the weight sheave 39 of the car 14. 23 is placed and the car 14 and the counterweight 15 are suspended by the 2: 1 roping method.

The side view which shows the structure of the elevator before renewal. The top view which shows the arrangement | positioning relationship between the winding machine before a renewal, and a passenger car and a balance weight. The side view which shows the structure of the hoist for renewal. The front view which shows the structure of the hoist for renewal. The rear view which shows the structure of the hoist for renewal. The side view which shows the structure of the elevator after renewal. A side view showing a car before renewal and a car after renewal. The side view which shows the balance weight before renewal and the balance weight after renewal. The top view which shows the arrangement | positioning relationship between the hoisting machine after a renewal, and a passenger car and a balance weight. The top view which shows the arrangement | positioning relationship between a winding machine when a balance weight is arrange | positioned at the side surface side of a passenger car, and a passenger car and a balance weight.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hoistway 2 ... Machine room 3 ... Existing winding machine 7 ... Machine bed 10 ... Traction sheave 11 ... Warp sheave 13 ... Main rope 14 ... Car 15 ... Balance weight 20 ... Cylindrical motor 22 ... Rotating shaft 23 ... Traction sheave 24 ... New hoist 34 ... Car sheave 39 ... Weight sheave

Claims (5)

It is a method of renewing to a form in which an elevator is driven using a new hoisting machine instead of an existing hoisting machine installed on a machine bed provided in a machine room above the hoistway,
Attach the traction sheave to the rotation axis of the cylinder motor and the new hoisting machine, the hoisting machine of this novel, said side of the installed state of the existing upper winding machine on the machine bed of the machine room A main rope that is installed in an empty space above the machine bed and suspends the car and the balance weight in the hoistway is wound around the traction sheave of the new hoisting machine, and the car and An elevator renewal method characterized by driving a counterweight.   As a method of suspending the car and the balance weight with the main rope, the 1: 1 roping method in the case of using the existing hoisting machine is changed to the 2: 1 roping method in the case of using the new hoisting machine. The elevator renewal method according to claim 1.   The car cage and the balance weight that were driven by the existing hoisting machine are modified to attach the car sheave and the weight sheave, respectively, and the car and the balance weight are suspended by a 2: 1 roping method. The elevator renewal method according to claim 2.   2. The elevator renewal method according to claim 1, wherein the new hoisting machine is of a type that does not have a reduction gear mechanism for power transmission. 5. The elevator renewal method according to claim 4, wherein the traction sheave of the new hoisting machine is directly attached to the rotating shaft of the new hoisting machine.

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