JP2017190220A - Double-deck elevator - Google Patents

Abstract

[Problem] To provide a double-deck elevator in which the upper car and the lower car are in a state of landing on their respective destination floors as much as possible when the outer car frame is stopped at a target stop position in raising/lowering control of the outer car frame. to do. A cage interval adjusting means for adjusting the cage interval in the vertical direction between an upper car 14 and a lower car 16 to the floor heights of two upper and lower target floors; Acquire the amount of downward displacement (ΔR/2) of the upper car 14 and the lower car 16 suspended from the current cable 20 with respect to the current cable 20 with respect to the current cable 20 and a target stop that corrects the target stop positions corresponding to the two destination floors of the outer car frame 12 upward by the displacement amount (ΔR/2) acquired by the displacement amount acquisition means. and position correction means. [Selection drawing] Fig. 8

Description

  The present invention relates to a double deck elevator, and more particularly to a double deck elevator in which an upper car and a lower car are provided in an outer car frame.

  A double-deck elevator installed in an outer car frame that goes up and down in the hoistway and that has a two-story structure is more transportable than an elevator that consists of a single car. Excellent. Moreover, the installation space for obtaining the equivalent transportation capacity is small. For this reason, introduction to large-scale high-rise buildings is being promoted.

  The outer car frame is connected to a counterweight and a main rope, and the main rope is hung on a sheave of a hoist installed in a machine room above the hoistway. And by driving the hoisting motor constituting the hoisting machine and rotating the sheave, the outer car frame is raised and lowered to the target position corresponding to the target floor of each of the upper and lower car, The upper and lower baskets are set on different floors.

  By the way, depending on the building, the floor height may be uneven. For example, the first floor is an entrance hall with a high ceiling, and the second floor or more is an office floor having a lower ceiling than the first floor.

  In such a double deck elevator installed in a building with uneven floor heights, it is necessary to adjust the distance between the upper car and the lower car according to the floor heights of the two floors to be landed at the same time. As a double-deck elevator that enables this adjustment, the upper car is hung on one end of a wire rope that is hung on a drive sheave and folded, and the lower car is hung on the other end. What has a structure is known (patent document 1, patent document 2).

  According to this configuration, if the drive sheave is rotated in the first direction and the lower car is lifted and raised, the upper car can be lowered and the interval between the cars can be shortened. What is the drive sheave in the first direction? When the car is rotated in the opposite second direction and the upper car is lifted and raised, the lower car is lowered and the car interval can be increased, so that the car interval can be adjusted. Thereby, the space | interval of a cage | basket | car can be adjusted according to the destination floor.

JP 2011-116541 A Japanese Patent No. 5523625 Japanese Patent No. 5837800

  However, even if the outer car frame is stopped at the target position, there may be a case where the upper car and the lower car are displaced in the vertical direction with respect to the respective destination floors.

  For example, the following causes can be considered. The wire rope that is always pulled by the weight of the upper car and the lower car is stretched over time. In addition, there is a temporary increase in the weight of passengers in the upper and lower cars. When elongation occurs in the wire rope, the upper car and the lower car are displaced downward relative to the outer car frame. In this case, even if the outer car frame is stopped at the target position, the upper car and the lower car are displaced in the vertical direction from the respective target floors.

  In view of the above-described problems, the present invention provides an ascending / descending control of an outer car frame at a stage where the outer car frame is stopped at a target position, and the upper car and the lower car are landed on each destination floor as accurately as possible. It aims at providing the double deck elevator used as a state.

  In order to achieve the above object, the double deck elevator according to the present invention has an upper cage hung on one end side of a cord-like body folded on a sheave and a lower car hung on the other end side. A double deck elevator that raises and lowers an outer car frame provided inside to a target stop position in a hoistway and places the upper car and the lower car on each target floor, wherein the upper car and the lower car A car interval adjusting means for adjusting the car interval in the vertical direction of the car to the floor height of the two upper and lower destination floors, and suspended from the cord in the initial state at any position in the vertical direction on the outer car frame. A displacement amount acquisition means for acquiring a downward displacement amount of the upper cage and the lower cage suspended from the current cage for the upper cage and the lower cage; and corresponding to the two destination floors The target stop position The displacement amount obtained by the displacement acquiring detection means, characterized by having a a target stop position correcting means for correcting upward.

  The displacement amount acquisition means includes a magnetic linear scale that detects an absolute position of the upper car and the lower car in the vertical direction with respect to the outer car frame, and the magnetic type in the cord-like body in the initial state. The displacement is acquired based on the absolute position of the upper car and the lower car detected by a linear scale, and the absolute position detected by the magnetic linear scale in the current cable-like body. It is characterized by that.

  Further, the magnetic linear scale includes a magnetic tape stretched vertically on the outer car frame and a first reading unit that is attached to the upper car and reads the scale of the magnetic tape that indicates the absolute position. And a second reading unit that reads the scale of the magnetic tape that is attached to the lower cage and that indicates the absolute position, and the displacement amount acquisition means is the first in the cord-like body in the initial state. The scale read by the first reading unit and the scale read by the second reading unit, the scale read by the first reading unit in the current cord-like body, and the second A difference from the total of the scales read by the reading unit is acquired as the displacement amount.

  Further, the displacement amount acquisition means obtains the displacement amount immediately before the raising and lowering of the outer car frame from the destination floor on which the upper cage and the lower cage are respectively landed to the next destination floor. It is characterized by acquiring.

  Alternatively, the displacement amount acquisition means includes elongation amount acquisition means for acquiring an extension amount of the current cord-like body from the initial state, and acquires the displacement amount from the extension amount.

  According to the double deck elevator according to the present invention having the above-described configuration, the upper car hung on one end side of the cord-like body folded on the sheave and the lower car hung on the other end side are inside. In the double deck elevator for raising and lowering the outer car frame provided in the hoistway to the target stop position, the upper car frame is suspended from the cable body in the initial state at an arbitrary vertical position on the outer car frame. The target stop position corresponding to the upper and lower two target floors is corrected upward by the amount of downward displacement of the upper car and the lower car suspended from the current car-like body with respect to the car and the lower car. The upper car and the lower car with the car interval adjusted to the height of the two destination floors are as far as possible on each destination floor when the outer car frame is stopped at the target stop position (after correction). It will be in a state where it is correctly landed

1 is a diagram illustrating a schematic configuration of a double deck elevator according to a first embodiment. It is a top view which shows schematic structure of the photo sensor and light-shielding plate which comprise the car frame detection means, the upper car detection means, and the lower car detection means which were provided in the said double deck elevator. It is the block diagram which showed the main control apparatus which controls a winding machine, a hoisting machine, etc., and the sub control apparatus which controls a moving unit, a moving unit, etc. It is a figure which shows a raising / lowering table. It is a figure which shows a part of storage area in RAM and ROM which the sub-control apparatus installed in the outer car frame of the said double deck elevator has. It is a flowchart which shows the content of the initial position acquisition program performed in the said sub control apparatus. It is a flowchart which shows the content of the elongation amount calculation program performed in the said sub control apparatus. It is a figure for demonstrating the principle of correction | amendment of the target stop position of the outer cage | basket | car frame in the said double deck elevator. It is a flowchart which shows the outline of the raising / lowering control program of an outer cage frame performed in the main control apparatus of the said double deck elevator. It is a figure which shows schematic structure of the double deck elevator which concerns on Embodiment 2. FIG. It is a conceptual diagram which shows the modification 1 of the hanging aspect in the outer cage | basket | car of an upper cage | basket | car and a lower cage | basket | car. It is a conceptual diagram which shows the modification 2 of the hanging aspect in the outer cage | basket | car of an upper cage | basket | car and a lower cage | basket | car. It is a conceptual diagram which shows the modification 3 of the hanging aspect in the outer cage | basket | car of an upper cage | basket | car and a lower cage | basket | car. It is a flowchart which shows the outline of the other example of the raising / lowering control program of the outer cage frame performed in the main control apparatus of the said double deck elevator. It is a flowchart which shows the content of the present amount calculation program of displacement currently performed in the said sub-control apparatus.

Hereinafter, embodiments of a double deck elevator according to the present invention will be described with reference to the drawings.
<Embodiment 1>
〔overall structure〕
As shown in FIG. 1, the double deck elevator 10 according to the first embodiment includes an upper beam 12A, a lower beam 12B, and two standing frames 12C and 12D that connect the upper beam 12A and the lower beam 12B. Thus, the outer car frame 12 having a substantially rectangular shape which is long in the vertical direction (vertical direction) is provided.

  Inside the outer car frame 12, an upper car 14 and a lower car 16 are provided side by side in the vertical direction.

  A driven sheave 18 is attached to the outer car frame 12, and one end portion of the wire rope 20 that is hooked and folded on the driven sheave 18 above the upper car 14 is connected to the upper car 14 and the other end portion. Is connected to the lower car 16. Thus, the upper cage 14 is suspended from one end side of the wire rope 20 hung on the driven sheave 18, and the lower cage 16 is suspended from the other end side. As will be described later, the driven sheave 18 is a sheave that rotates following the wire rope 20 that travels as the lower car 16 moves up and down. The upper car 14 and the lower car 16 are guided to be movable in the vertical direction by a pair of guide rails (not shown) installed between the upper beam 12A and the lower beam 12B.

  Below the lower car 16 in the outer car frame 12, a moving unit 22 for moving the lower car 16 in the vertical direction is attached. The moving unit 22 includes a screw-type jack 24 (hereinafter simply referred to as “jack 24”) having an actuator 24A that moves up and down, and a motor 26 that drives the jack 24. The upper end of the actuator 24A is It is connected to the lower end of the car 16.

  The motor 26 is provided with a rotary encoder 27 (FIG. 3) for detecting the rotation angle of the output shaft, and the rotation angle (number of rotations) of the output shaft is controlled based on the output result from the rotary encoder 27. By doing so, the displacement amount of the actuator 24A in the vertical direction can be controlled.

  When the jack 24 is driven to move the lower car 16 upward, the upper car 14 connected to the lower car 16 by the wire rope 20 hung on the driven sheave 18 moves the distance of the lower car 16 by its own weight. Move down the same distance as. Thereby, the space | interval (henceforth a "car space | interval") in the up-down direction of the upper car 14 and the lower car 16 can be shortened.

  On the other hand, when the jack 24 is driven to move the lower car 16 downward, the upper car 14 is pulled up, so that the car interval can be increased.

  In this manner, the moving unit 22 functions as a car interval changing unit that changes the car interval by moving the lower car 16 in the vertical direction.

  Here, the car interval refers to the distance (D) in the vertical direction between the floor surface 16A of the lower car 16 and the floor surface 14A of the upper car 14. In this example, there are four car intervals D to be adjusted, for example, D1, D2, D3, and D4. That is, in the building where the double deck elevator 10 is installed, there are four levels of height between two floors on which the lower car 14 and the upper car 16 are simultaneously landed.

  Since the upper car 14 and the lower car 16 have substantially the same weight, the upper car 14 and the lower car 16 are connected to the jack 24 that moves up and down the lower car 16 suspended in a slidable manner by the upper car 14 and the wire rope 20. When no passenger is on any of these, the load is not so much applied. However, when the passenger gets on the lower car 16, the corresponding load is applied downward on the jack 24, and when the passenger gets on the upper car 14, the corresponding load is applied upward on the jack 24. Therefore, the jack 24 also functions as support means for supporting a load caused by weight imbalance caused by a difference in the number of passengers in the upper car 14 and the lower car 16.

  In order to accurately adjust the car interval D, the present embodiment includes absolute position detecting means for detecting the absolute positions of the upper car 14 and the lower car 16 in the vertical direction with respect to the outer car frame 12.

  As an absolute position detecting means, the double deck elevator 10 includes an absolute type magnetic linear scale 28 (hereinafter referred to as “magnetic scale 28”).

  The magnetic scale 28 is a magnetic tape 30 that is a recording tape that records absolute position (distance) information between one end and the other end as a magnetic pattern (magnetic scale) with a resolution of 0.5 mm, for example. And two reading units 32 and 34 for reading the magnetic scale from the tape 30. As the magnetic scale 28, for example, a known one such as “Absolute Magnetic Scale LIMAX Series” manufactured by Ergo Electronic Co., Ltd. can be used.

  The magnetic tape 30 is attached to the outer car frame 12 so that the length direction is the vertical direction. In this example, it is stretched between the upper beam 12A and the lower beam 12B. The magnetic tape 30 is not limited to the upper beam 12A and the lower beam 12B. For example, a support bracket (not shown) may be fixed to the upper and lower portions of the standing frame 12D and stretched between the support brackets. I do not care.

  As an example of the tension, for example, the upper end of the magnetic tape 30 is fixed to the support bracket (not shown) or the upper beam 12A fixed to the upper part of the standing frame 12D, while the lower end of the magnetic tape 30 and the standing frame are fixed. The support bracket (not shown) or the lower beam 12B fixed to the lower part of 12D is connected by a tension coil spring (not shown) so that the magnetic tape 30 is stretched with a certain tension. Can be considered.

  In place of the tension coil spring, a weight (not shown) may be suspended from the lower end of the magnetic tape 30 to attach the magnetic tape 30 in a state where a certain tension is applied.

  For example, the guide rail (not shown) that guides the upper car 14 and the lower car 16 in the vertical direction is attached to a surface that does not interfere with the guidance of the upper car 14 and the lower car 16. It doesn't matter.

  In this example, the magnetic tape 30 is attached in a direction in which the scale is graduated from the bottom to the top (that is, the direction in which the scale value increases in the upward direction). The direction in which the magnetic tape 30 is attached to the outer car frame 12 may be reversed.

  The reading unit 32 is fixed to the upper car 14, and the other reading unit 34 is fixed to the lower car 16. The fixed positions in the vertical direction with respect to the upper car 14 and the lower car 16 of each of the reading units 32 and 34 are arbitrary. Each of the reading units 32 and 34 is fixed to the upper car 14 and the lower car 16 when the upper car 14 and the lower car 16 are moved up and down by the moving unit 22. Any position can be used as long as the position can be moved along and the magnetic scale recorded on the magnetic tape 30 can be read.

  In the magnetic scale 28 provided as described above, the value of the magnetic scale read by the reading unit 32 indicates the absolute position in the vertical direction of the upper car 14 with respect to the outer car frame 12 at the time of reading. The value of the magnetic scale to be read indicates the absolute position in the vertical direction of the lower car 16 with respect to the outer car frame 12 at the time of reading. That is, the absolute position of the upper car 14 and the lower car 16 with respect to the outer car frame 12 can be detected by the magnetic scale 28.

  Further, the difference (hereinafter referred to as “scale difference”) of the magnetic scale values read by the reading unit 32 and the reading unit 34 (hereinafter referred to as “scale difference”) has a one-to-one correspondence with the car interval D. Therefore, the car interval D is indexed. As shown in FIG. 1, when the reading units 32 and 34 are fixed at the same height from the floor surfaces 14A and 16A of the upper car 14 and the lower car 16, respectively, the scale difference becomes equal to the car interval D. . The scale values read by the reading units 32 and 34 are referred to, and the car interval D is adjusted to the height of the destination floor as will be described later.

  As described above, the machine room 38 is provided above the hoistway 36 where the outer car frame 12 provided with the upper car 14, the lower car 16, and the like moves up and down, and the machine room 38 includes a hoist 40. Is installed. The hoisting machine 40 includes a hoisting machine motor 40A (FIG. 3), a sheave 40B provided on an output shaft (not shown) of the hoisting machine motor 40A, and a rotary encoder 40C provided coaxially with the output shaft. Etc. As the rotary encoder 40C, for example, a multi-turn absolute type can be used.

  A deflecting wheel 42 is installed adjacent to the hoisting machine 40, and a main rope 44 is hung on the sheave 40 </ b> B and the deflecting wheel 42 of the hoisting machine 40.

  The outer cage frame 12 is connected to one end of the main rope 44, and the counterweight 46 is connected to the other end.

  In the above configuration, when the sheave 40B is rotated by using the hoisting motor 40A (FIG. 3) as a drive source, the outer car frame 12, the upper car 14, the lower car 16, and the counterweight 46 are in the hoistway. It moves up and down in the opposite directions in 36.

  A car frame detecting means 48 for detecting the vertical position of the outer car frame 12 in the hoistway 36, an upper car detecting means 50 for detecting the vertical position of the upper car 14 in the hoistway 36, and a lower car A lower car detecting means 52 for detecting the position in the vertical direction in the sixteen hoistways 36 is provided.

  The car frame detection means 48 includes a photo sensor 54A fixed to the outer car frame 12 and a light shielding plate 56A fixed to the side wall 36A of the hoistway 36.

  The upper car detecting means 50 includes a photo sensor 54B fixed to the upper car 14 and a light shielding plate 56B fixed to the side wall 36A of the hoistway 36.

  The lower car detecting means 52 includes a photo sensor 54C fixed to the lower car 16 and a light shielding plate 56C fixed to the side wall 36A of the hoistway 36.

  Since the photosensors 54A, 54B, and 54C are basically the same in configuration, the alphabetic suffixes (A, B, and C) will be omitted when it is not necessary to distinguish between them. The same applies to the light shielding plates 56A, 56B, and 56C.

  As shown in FIG. 2, the photosensor 54 is a transmission type photosensor in which a light emitting element 542 and a light receiving element 544 are provided to face each other, and is relatively located in a region where the light emitting element 542 and the light receiving element 544 are opposed to each other. The light shielding plate 56 that enters is detected.

  Returning to FIG. 1, the fixed positions of the light shielding plates 56A, 56B, and 56C in the vertical direction will be described.

  First, the light shielding plates 56B and 56C will be described. The light shielding plate 56B is fixed at a position detected by the photosensor 54B when the upper car 14 is landed on the target floor.

  The light shielding plate 56C is fixed at a position detected by the photosensor 54C when the lower car 16 reaches the destination floor.

  Therefore, whether or not each of the upper car 14 and the lower car 16 is landing on the destination floor can be determined depending on whether or not the photosensors 54B and 54C detect the light shielding plates 56B and 56C, respectively.

  The light shielding plate 56A is located at a position detected by the photosensor 54A when the upper car 14 and the lower car 16 are simultaneously landing on the respective target floors and the length of the wire rope 20 is the reference length. It is fixed. Here, the reference length refers to the length of the wire rope 20 when the installation of the double deck elevator 10 in the building is completed and no passengers are on the upper car 14 and the lower car 16. In other words, the reference length is the length of the wire rope 20 defined by the design specifications.

  The light shielding plate 56B and the light shielding plate 56C are provided as a pair for each of the two target floors on which the upper car 14 and the lower car 16 land simultaneously. Further, a light shielding plate 56A is provided corresponding to the pair of light shielding plates 56B and 56C. That is, the light shielding plate 56 </ b> A is provided for each target stop position in the vertical direction within the hoistway 36 of the outer car frame 12.

  The double deck elevator 10 having the above structure is controlled by the main control device 58 and the sub control device 66.

  The main controller 58 is installed in the machine room 38 and performs drive control of the hoisting machine motor 40A (FIG. 3) of the hoisting machine 40. Based on the output value (rotation angle) from the rotary encoder 40C of the hoisting machine 40, the main controller 58 controls the hoisting machine motor 40A to move the outer car frame 12 up and down.

  As shown in FIG. 3, the main controller 58 has a configuration in which a RAM 62 and a ROM 64 are connected to the CPU 60.

  As shown in FIG. 4, the ROM 64 has a lifting table 640. The lift table 640 is a table that stores the target rotary angle of the rotary encoder and the car interval identification information in association with each set of floors (target floors) on which the lower car 16 and the upper car 14 land simultaneously. Each of the associations is identified by an ID (001, 002, 003, ...).

  The target rotation angle is referred to by the CPU 60 in the raising / lowering control of the outer car frame 12. The CPU 60 drives the hoisting motor 40A to rotate until the output value (rotation angle) from the rotary encoder 40C matches the target rotation angle (E1, E2, E3,...) Corresponding to the target floor. Then, the hoisting machine motor 40A is stopped in a matched state. As a result, the outer car frame 12 is stopped at a position (target stop position) where the upper car 14 and the lower car 16 can land on the respective target floors in the vertical direction in the hoistway 36. Become. Since the target rotation angle has a one-to-one correspondence with the target stop position of the outer car frame 12 in the vertical direction in the hoistway 36, the target rotation angle is nothing but the target stop position.

  Each of the target rotation angles in the lifting table 640 is stored during the data acquisition operation. In the data acquisition operation, the outer car frame 12 is actually moved up and down, and each output value (rotation angle) output by the rotary encoder 40C when the outer car frame 12 is detected by each of the car frame detecting means 48 is sent to the elevating table 640. Store. The data acquisition operation is performed periodically when the double deck elevator 10 is installed in the building and thereafter, and the target rotation angle of the lifting table 640 is updated in a timely manner.

  The car interval identification information d1, d2, d3, d4 specifies the car intervals D1, D2, D3, D4, respectively. For example, when the destination floor of the lower car 16 is 1 and the destination floor of the upper car 14 is 2, the car interval D should be adjusted to D1, and therefore corresponds to ID = 001 of the car interval identification information of the lift table 640. “D1” is stored in the column to be.

Returning to FIG. 3, the CPU 60 executes various control programs stored in the ROM 64 to control the hoisting machine motor 40 </ b> A and the like so that the smooth outer car frame 12 (the upper car 14, the lower car 16). ) In the hoistway 36 is realized. The main controller 58 (the CPU 60 thereof) executes various executions such as a “car interval adjustment command”, an “initial position acquisition command”, and an “elongation amount transmission command”, which will be described later, at a predetermined timing with respect to the sub control device 66. Give orders.
The RAM 62 is used as a work memory when the CPU 60 executes various control programs.

  As shown in FIG. 1, the sub control device 66 is installed in the outer car frame 12. The sub-control device 66 controls the movement unit 22 to adjust the car interval D. As shown in FIG. 3, the sub controller 66 includes a CPU 68 and a ROM 70 and a RAM 72 connected to the CPU 68. The ROM 70 stores various programs executed by the CPU 68, and has a table and a storage area for storing various information.

  The RAM 72 is used as a work memory when the CPU 68 executes various programs, and has various storage areas.

  The ROM 70 has a car interval information table 700 as shown in FIG. The car interval information table 700 stores car interval identification information d1, d2, d3, d4 and scale differences ΔS1, ΔS2, ΔS3, ΔS4 corresponding to each other in association with each other. The scale differences ΔS1 to ΔS4 are hereinafter referred to as “reference scale differences”. Each of the reference scale differences ΔS1 to ΔS4 has an allowable width in consideration of the required car space accuracy. When receiving a car interval adjustment command including car interval identification information (any of d1, d2, d3, and d4) from the main controller 58, the CPU 68 reads the corresponding reference scale difference (ΔS1, ΔS2) from the car interval information table 700. , ΔS3, or ΔS4). Then, the CPU 68 moves the upper car 14 and the lower car 16 in the vertical direction by controlling the moving unit 22 so that the scale difference obtained from the scale values read by the reading units 32 and 34 falls within the range of the reference scale difference. Let As a result, the car interval D is adjusted to a car interval (any one of D1 to D4) that matches the floor heights of the two upper and lower destination floors.

  However, the wire rope 20 that suspends the upper car 14 and the lower car 16 is always under tension, and the wire rope 20 is stretched over time due to this tension. In addition, the vehicle temporarily grows depending on the weight of the passenger who gets on the upper car 14. For this reason, even if the outer car frame 12 is stopped at the target stop position in a state in which the car interval D is accurately adjusted, the upper car 14 and the lower car 16 are vertically moved between the respective target floors. Deviation occurs. Therefore, in order to correct the target stop position in the raising / lowering control of the outer car frame 12 and eliminate the deviation, it is necessary to grasp the extension amount of the wire rope 20.

  Furthermore, it is necessary to grasp the amount of elongation of the wire rope 20 in order to maintain and manage the wire rope 20 that has been elongated due to secular change or to replace it with a new wire rope.

  Therefore, in this embodiment, the amount of elongation of the wire rope 20 is acquired using the magnetic scale 28. In order to acquire the elongation amount, the ROM 70 and the RAM 72 further have a storage area for storing the scale values read by the reading units 32 and 34 of the magnetic scale 28.

As shown in FIG. 5B, the ROM 70 stores an initial position for each reading unit 32 (upper car) and reading unit 34 (lower car) as an area for storing the scale values read by the reading units 32 and 34. It has areas 701 and 702.
As shown in FIG. 5C, the RAM 72 stores a time-dependent position for each reading unit 32 (upper car) and reading unit 34 (lower car) as an area for storing scale values read by the reading units 32 and 34. It has areas 721 and 722. That is, the ROM 70 and the RAM 72 function as storage means for distinguishing and storing the scale values (absolute positions) read by the reading units 32 and 34 of the magnetic scale 28. The initial position storage areas 701 and 702 and the time-lapse position storage areas 721 and 722 are storage areas provided in the ROM 70 or the RAM 72 according to the timing of reading by the reading units 32 and 34. The timing will be described later. To do.

  Further, as shown in FIG. 5 (f), the RAM 72 is based on each of the absolute positions stored in the initial position storage areas 701 and 702 and the time-dependent position storage areas 721 and 722, and is calculated as described below. It has an elongation amount storage area 723 for storing the amount.

[Elongation acquisition processing]
Next, the elongation amount acquisition process of the wire rope 20 executed by the sub-control device 66 will be described based on the flowcharts shown in FIGS.

First, the initial position acquisition process will be described with reference to FIG.
As shown in FIG. 6, when an initial position acquisition command is received from the main controller 58 (YES in step S10), the CPU 68 (FIG. 3) of the sub controller 66 determines whether the upper car 14 and the lower car 16 are stopped. It is confirmed whether or not (step S11).

  The initial position acquisition command is sent from the main control device 58 to the sub control device 66, for example, when (i) the installation of the double deck elevator 10 in the building is completed, or (ii) the wire rope 20 is cut off. Immediately after being made, or (iii) immediately after the wire rope 20 is replaced with a new one, it is emitted. Both are timings immediately after the wire rope 20 is attached in a state adjusted to the reference length. Here, a state where the attached wire rope 20 is at the length of the reference length is referred to as an “initial state”. That is, the initial position acquisition command is issued from the main control device 58 to the sub control device 66 at a timing when the wire rope 20 is in the initial state.

  Moreover, in order to remove other factors (disturbances) that cause the wire rope 20 to stretch from the above-mentioned purpose of acquiring the amount of elongation of the wire rope 20, it is preferable that the initial position acquisition command is made at the following timing. That is, it is the timing when no passengers are on the upper car 14 and the lower car 16 and the outer car frame 12 is stopped.

  If it is determined in step S11 that the upper car 14 and the lower car 16 are not stopped (NO in step S11), waiting to stop and if it is determined that the car is stopped (YES in step S11), Proceed to step S12.

  In step S12, the CPU 68 acquires the absolute position (scale value) of the upper car 14 and the absolute position (scale value) of the lower car 16 from the reading unit 32 and the reading unit 34, respectively.

  The obtained absolute position of the upper car 14 and the absolute position of the lower car 16 are respectively stored in the initial position storage areas 701 and 702 (FIG. 5B) of the ROM 70 (step S13), and this program is terminated. To do. That is, the initial position storage areas 701 and 702 store the absolute positions read by the reading units 32 and 34 at the timings (i) to (iii).

  Here, the absolute positions (scale values) respectively stored in the initial position storage areas 701 and 702 are hereinafter referred to as “initial positions”. Further, the initial positions stored in the initial position storage areas 701 and 702 will be described below as “U1” and “L1” as shown in FIG.

Next, an elongation amount calculation process executed by the sub control device 66 will be described with reference to FIG.
As shown in FIG. 7, when the “elongation amount transmission command” is received from the main control device 58 (YES in step S20), the CPU 68 (FIG. 3) of the sub control device 66 stops the upper car 14 and the lower car 16. It is confirmed whether it is in the middle (step S21). The “elongation amount transmission command” is attached from the main control device 58 to the sub control device 66 in a state in which the length of the wire rope 20 shown in the above (i) to (iii) is adjusted to the reference length. For example, (a) the time when the double deck elevator 10 starts daily operation, (b) a predetermined time when the midnight sky is off, (c) It is issued at a timing (second time point) such as one week interval or (d) one month interval.

  Further, the timing of issuing the “elongation amount transmission command” is not limited to an equal time interval, and (e) the above (i) the installation of the double deck elevator 10 in the building is completed for a while or (iii) the wire While the wire rope 20 is replaced with a new one and the wire rope 20 is new for a while or the like, the progress of the wire rope 20 is relatively fast. Therefore, during this time, the time interval is shortened and the progress of the elongation is slowed down. As the time interval increases, it does not matter.

  Alternatively, when considering the growth due to the weight of passengers, etc., (f) it may be the timing immediately before the start of raising / lowering to the next destination floor while raising / lowering from one destination floor to the next destination floor. . Immediately before the start refers to the period before the elevator starts after the passenger boarding / exiting on the certain destination floor is finished and the car door (not shown) is closed. This is because it is considered that the vertical movement (extension and contraction of the wire rope 20) of the car accompanying the movement of the passenger has almost converged since the movement of the passenger in the car has been completed.

  If the upper car 14 and the lower car 16 are not stopped (NO in step S21), they wait for the car to stop, and if it is stopped (YES in step S21), the process proceeds to step S22 as it is.

  In step S22, the CPU 68 obtains the absolute position (scale value) of the upper car 14 and the absolute position (scale value) of the lower car 16 from the reading unit 32 and the reading unit 34, respectively.

  Then, the obtained absolute position of the upper car 14 and the absolute position of the lower car 16 are stored in the temporal position storage areas 721 and 722 (FIG. 5C) of the RAM 72, respectively (step S23). In other words, the absolute positions read by the reading units 32 and 34 are stored in the time-lapse position storage areas 721 and 722 by overwriting at the timings (a) to (f).

  Here, the absolute positions stored in the temporal position storage areas 721 and 722 are hereinafter referred to as “temporal positions”. Further, the temporal positions stored in the temporal position storage areas 721 and 722 will be described below as “U2” and “L2” as shown in FIG.

  Next, the CPU 68 calculates a difference ΔL between the elapsed time position L2 of the lower car 16 and the initial position L1 of the lower car 16 (step S24).

          ΔL = (L2) − (L1) (1)

  From the calculated difference ΔL and the initial position U1 of the upper car 14, an estimated position Us of the upper car 14 is calculated when it is assumed that the wire rope 20 is not stretched (step S25). Here, the “estimated position” is an estimated position when the absolute positions (temporal positions) stored in the temporal position storage areas 721 and 722 are read by the reading units 32 and 34, respectively.

          Us = (U1) − (ΔL) (2)

  Equation (2) is based on the assumption that if the wire rope 20 is not stretched, the upper car 14 will be located at a position displaced by the same amount as the displacement (ΔL) of the lower car 16.

  A difference ΔU between the elapsed time position U2 of the upper car 14 and the calculated estimated position Us is calculated (step S26).

          ΔU = (Us) − (U2) (3)

  In this example, since the difference ΔU becomes the elongation amount ΔR of the wire rope 20, ΔU is stored as it is in the elongation amount storage area 723 of the RAM 72 (FIG. 5F) as the elongation amount ΔR of the wire rope 20. (Step S27).

  That is, from the estimated position (scale value) of the upper car 14 when the wire rope 20 is not stretched (when the wire rope 20 remains at the reference length), the actual temporal position of the upper car 14 In the wire rope 20 by subtracting (scale value), the amount of elongation generated in the wire rope 20 from the time of detection of the initial position (first time point) to the time of detection of the time-dependent position (second time point) ( Elongation due to secular change) or elongation at the time of detection of the initial position (first time) (second time) relative to the detection of the initial position (second time) (elongation due to changes over time and the weight of passengers, etc.) Is calculated.

  In this way, steps S12, S13 (FIG. 6) and steps S22 to S27 (FIG. 7) function as means for acquiring the amount of elongation generated in the wire rope 20, and the amount of elongation ΔR is acquired.

  When the elongation amount ΔR of the wire rope 20 is stored in the ROM 72 (step S27), the elongation amount ΔR is transmitted to the main controller 58 (step S28). The reason for transmitting to the main controller 58 is to contribute to a target stop position (target rotation angle) correction process of the outer car frame 12 described later.

  In the above example, the magnetic tape 30 is attached in a direction in which the scale is graduated from the bottom to the top (that is, in the direction in which the scale value increases in the upward direction). Since the difference ΔU is calculated as a negative value when it is attached in a direction in which the scale is graduated from the bottom (that is, the lower side, the direction in which the scale value increases), its absolute value | ΔU Is stored in the extension amount storage area 723 (FIG. 5 (f)) of the ROM 72 as the extension amount ΔR of the wire rope 20.

  In addition, a maintenance portable terminal (not shown) is connected to the sub-control device 66, the extension amount is read from the RAM 72, and the read extension amount is displayed on the monitor screen of the portable terminal, thereby maintaining maintenance. Can know the amount of elongation of the wire rope 20 due to aging. The amount of elongation can contribute to the formulation of a time for cutting the wire rope 20 or replacing it with a new wire rope. However, in this case, it is preferable that both the upper car 14 and the lower car 16 have an elongation amount based on the absolute position (step S22) acquired in an empty state (a state in which no passengers are on board).

  Alternatively, the portable terminal may be connected to the main control device 58 so as to read out the elongation amount stored in the RAM 72 of the sub control device 66 from the main control device 58.

  As described above, according to the double deck elevator 10 according to the present embodiment, only the magnetic scale 28 installed in the outer car frame 12 and the upper car 14 and the lower car 16 provided inside the outer car frame 12 is detected. Based on the result, the amount of elongation of the wire rope 20 can be acquired.

  Further, as recognized from the above description, the positions of the upper car 14 and the lower car 16 in the vertical direction in the outer car frame 12 when detecting the initial position and the time-dependent position are arbitrary. For this reason, the elongation amount of the wire rope can be acquired immediately when necessary.

  In the above example, the estimated position Us of the upper car 14 is determined from the difference ΔL between the time-lapse position L2 of the lower car 16 and the initial position L1 of the lower car 16 and the initial position U1 of the upper car 14, and the estimated position Us. The elongation amount ΔR (ΔU) of the wire rope 20 is calculated from the time-lapse position U2 of the upper cage 14, but this may be reversed.

  That is, the estimated position Ls of the lower car 16 is determined from the difference ΔU between the elapsed time position U2 of the upper car 14 and the initial position U1 of the upper car 14 and the initial position L1 of the lower car 16, and the estimated position Ls and the lower car 16 are determined. You may make it calculate elongation amount (DELTA) R ((DELTA) L) of the wire rope 20 from the time passage position L2.

  Further, in the above example, the sub-control device 66 has executed processing necessary for obtaining the amount of elongation of the wire rope 20 according to a command from the main control device 58, but the sub-control device 66 does not depend on the command from the main control device 58. The control device 66 itself may perform the acquisition process (steps S12, S13, S22 to S27) of the amount of elongation of the wire rope 20 at the timing.

[Target stop position (target rotation angle) correction processing]
Correction of the target stop position (target rotation angle) of the outer car frame 12 based on the obtained elongation amount ΔR of the wire rope 20 will be described with reference to FIGS. 1 and 8.

  FIG. 1 shows the length of the wire rope 20 as a reference length, the outer car frame 12 by the car frame detecting means 48, the upper car 14 by the upper car detecting means 50, and the lower car by the lower car detecting means 52. Reference numeral 16 denotes a state where each is detected.

  For example, FIG. 1 will be described assuming that the lower car 16 is on the third floor and the upper car 14 is on the fourth floor. In this case, the rotation angle detected by the output from the rotary encoder 40C is E3 (FIG. 4), and the outer car frame 12 is stopped at the target stop position.

  A state where the wire rope 20 is extended by ΔR from the state shown in FIG. 1 is assumed. FIG. 8A shows a case where the lower car 16 is landed on the third floor in this assumed state. The upper car 14 is shifted downward from the landing position by the amount of elongation ΔR of the wire rope 20. Also, the car interval D is shorter than the car interval D2 by ΔR.

  FIG. 8B shows a state in which the moving unit 22 is controlled based on the detection result of the magnetic scale 28, the upper car 14 and the lower car 16 are moved in the vertical direction, and the car interval is adjusted to D2. The upper car 14 is displaced upward and the lower car 16 is displaced downward (ΔR / 2), respectively, and the car interval is adjusted to D2.

  Even when the car interval is properly adjusted and the outer car frame 12 is stopped at the target stop position, the upper car 14 and the lower car 16 are respectively moved downward from the landing position when the wire rope 20 is extended by ΔR ( It is shifted by [Delta] R / 2) (FIG. 8 (b)).

  In other words, the upper car 14 and the lower car 16 adjusted to the car interval D2 are suspended from the position suspended by the wire rope 20 in the initial state (reference length) in the vertical direction of the outer car frame 12. This means that the displacement amount (ΔR / 2) is displaced downward to the position suspended by the wire rope 20 (when the step S22 (FIG. 7) is executed). Needless to say, the upper car 14 and the lower car 16 are displaced downward by the amount of (ΔR / 2) regardless of the size of the car distance D, not limited to the car distance D2. ing. That is, the upper car 14 and the lower car hung on the current wire rope 20 with respect to the upper car 14 and the lower car 16 hung on the wire rope 20 in the initial state at any position in the vertical direction in the outer car frame 12. The downward displacement amount of 16 (hereinafter referred to as “current displacement amount”) is (ΔR / 2).

  Therefore, the target stop position of the outer car frame 12 is corrected upward by a distance corresponding to the extension amount ΔR of the wire rope 20. In this example, the current displacement amount corresponding to (ΔR / 2) is corrected upward. Specifically, in the lift table 640 (FIG. 4), the target rotation angle E3 identified by ID = 003 is corrected by the current displacement amount corresponding to (ΔR / 2). Here, the rotation amount of the sheave 40B corresponding to the current displacement amount ((ΔR / 2) in this example) is referred to as a corrected rotation amount. The relationship between the current displacement amount and the corrected rotation angle can be easily obtained from the diameter of the sheave 40B and the like.

  FIG. 8C shows a state where the outer car frame 12 is stopped at the corrected target rotation angle (corrected target stop position). The outer car frame 12 is stopped when it is displaced upward (ΔR / 2) from the target stop position before correction, and the upper car 14 and the lower car 16 are respectively placed on the target floors (in this example, the fourth floor and the third floor). Implanted.

  The elevation control of the outer car frame 12 including the target rotation angle correction process will be described with reference to the flowchart shown in FIG.

  The elevator control program is executed after the next destination floor is determined from the situation of the call in the car of the upper car 14 and the lower car 16 and the landing call on each floor.

  The CPU 60 (FIG. 3) of the main control device 58 transmits an “elongation amount transmission command” to the sub control device 66 (FIG. 3) (step S30). Receiving the “elongation amount transmission command”, the sub-control device 66 executes the above-described elongation amount calculation process (FIG. 7) and transmits the acquired elongation amount ΔR to the main control device 58 (FIG. 7, step S28). . Note that, as described above, it is preferable that the elongation amount calculation process is executed in a state where the passengers get on and off at the current stop floor and the car door (not shown) is closed.

  When the CPU 60 receives the extension amount ΔR from the sub-control device 66 (YES in step S31), the CPU 60 calculates a corrected rotation amount ΔE corresponding to the current displacement amount (ΔR / 2) from the extension amount ΔR (step S32). As described above, Steps S12, S13 (FIG. 6), Steps S22 to S27 (FIG. 7), and Step S32 function as an elongation amount acquisition unit as described above. The current displacement amount (ΔR / 2) is acquired from the elongation amount ΔR obtained in S27 (FIG. 7) (step S32). The current displacement amount acquisition unit functions, and from the acquired current displacement amount (ΔR / 2), A corrected rotation amount ΔE is calculated (step S32).

  The CPU 60 reads the target rotation angle E (E1, E2, E3,...) Corresponding to the next destination floor stop from the lifting table 640 (FIG. 4) (step S33) and corrects it to the read target rotation angle E. The corrected target rotation angle Eh (= E + ΔE) is obtained by adding the rotation amount ΔE (step S34). Thus, steps S32 to S34 are target stop position (target rotation angle) correction means for correcting the target rotation angle that is the target stop position by the correction rotation amount ΔE corresponding to the current displacement amount corresponding to the extension amount ΔR. Function as.

  Then, the CPU 60 activates the hoisting motor 40A to start raising / lowering the outer car frame 12 (step S35), and the target rotation angle Eh is detected with reference to the output value (rotation angle) from the rotary encoder 40C. (YES in step S36), the hoist motor 40A is rotated to move the outer car frame 12 up and down to the target floor (step S37).

  When the next destination floor is determined, the CPU 60 of the main controller 58 determines the car interval identification information (d1, d2, d3,...) Before and after the transmission of the “elongation amount transmission command” (step S30). A car interval adjustment command including any one of d4) is transmitted to the sub-control device 60. When receiving the car interval adjustment command, the sub-control device 66 adjusts the car interval D as described above until the raising and lowering of the outer car frame 12 to the destination floor is completed (step S37).

  When the raising / lowering of the outer car frame 12 is stopped (step S37), the main controller 58 indicates that the upper car detecting means 50 detects the upper car 14 and the lower car detecting means 52 detects the lower car 16. If necessary, each car door (not shown) is opened as necessary.

  As described above, according to the double deck elevator 10 according to the first embodiment, the elongation amount ΔR of the wire rope 20 that suspends the upper car 14 and the lower car 16 is acquired (FIG. 7, steps S26 and S27), and the elongation is increased. The target rotation angle, which is the target stop position, is corrected by the current displacement amount (corresponding to the correction rotation amount ΔE) corresponding to the amount ΔR. As a result, when the outer car frame 12 is stopped at the corrected target stop position, the upper car 14 and the lower car 16 with the car spacing adjusted to the height of the two upper and lower target floors are extended to the wire rope 20. Regardless, you will be landed on each destination floor as accurately as possible.

  In the above example, steps S32 to S34 are executed before the elevating from the current stop floor to the next destination floor is started (step S35). It may be executed before reaching the target rotation angle (target stop position) stored in 640 (FIG. 4). Even in this case, the outer car frame 12 is stopped at the corrected target stop position. In short, the outer car frame 12 moves from the target floor on which the upper car 14 and the lower car 16 are respectively landed to the target rotational angle corresponding to the next target floor (the target rotational angle stored in the lifting table 640). It is only necessary that the target rotation angle (target stop position) is corrected before the arrival.

<Embodiment 2>
The double deck elevator 10 according to the first embodiment is a jack type double deck elevator in which one of the upper car 14 and the lower car 16 (in this example, the lower car 16) is moved up and down by a jack 24. As shown in FIG. 10, the double deck elevator 74 according to the second embodiment has a secondary winding on which the wire rope 20 that connects the upper car 14 and the lower car 16 is installed on the upper beam 12 </ b> A of the outer car frame 12. This is a traction type double deck elevator that is hung on the drive sheave 76A of the machine 76 and rotates the drive sheave 76A with a motor 76B to change the car interval.

  The double deck elevator 74 according to the second embodiment has substantially the same configuration as the double deck elevator 10 of the first embodiment, except that the driving method for changing the car interval between the upper car 14 and the lower car 16 is different. . Therefore, in FIG. 10, the same reference numerals are given to substantially the same components as those of the double deck elevator 10 shown in FIG. 1, and the description thereof is omitted.

  The sub-control device 66 of the double deck elevator 74 is the same as that of the first embodiment, although the installation position is different. In the second embodiment, the initial position acquisition program and the elongation calculation program executed by the CPU 68 of the sub-control device 66 are the same as those described based on the flowcharts shown in FIGS. The lifting control program executed by the CPU 60 of the device 58 is also the same as that described based on the flowchart shown in FIG.

  As mentioned above, although the double deck elevator which concerns on this invention has been demonstrated based on embodiment, of course, this invention is not restricted to an above-described form, For example, it can also be set as the following forms.

  (1) In the above embodiment, the wire rope 20 is used as the cable-like body that suspends the upper car 14 and the lower car 16 in the outer car frame 12, but the rope that suspends the upper car 14 and the lower car 16. The shape is not limited to a wire rope, and for example, a rubber belt with a core wire such as a steel cord or a belt made of carbon fiber may be used. In short, the present invention can be applied to a double deck elevator having a configuration in which an upper car and a lower car are suspended by a cord-like body that is stretched due to secular change or stretched by a load of a passenger or the like. is there.

  (2) In the above embodiment, the magnetic scale 28 is used as the detecting means for detecting the absolute position of the upper car 14 and the lower car 16 in the vertical direction with respect to the outer car frame 12, but the present invention is not limited to this. May be used.

(A) Optical one-dimensional code position (distance) sensor An optical one-dimensional code position (distance) sensor including an optical recording tape using a one-dimensional code may be used. As the one-dimensional code, for example, a barcode can be used.

  The barcode tape is an optical tape in which absolute position (distance) information from one end portion to the other end portion is recorded with a barcode. The optical one-dimensional code position (distance) sensor includes a barcode reader that is a reading unit that optically reads a barcode recorded on a barcode tape.

  When the optical one-dimensional code position (distance) sensor is used instead of the magnetic scale 28, the bar code tape is stretched instead of the magnetic tape 30, and the bar code is replaced with the reading units 32 and 34. Bar code readers for reading bar codes recorded on the tape are installed in the upper car 14 and the lower car 16, respectively. As this optical one-dimensional code position (distance) sensor, for example, an optical linear distance sensor OLM manufactured by Gic Corporation can be used.

(B) Optical two-dimensional code position (distance) sensor An optical two-dimensional code position (distance) sensor including an optical recording tape using a two-dimensional code may be used. As the two-dimensional code, for example, a matrix type two-dimensional code can be used.

  The two-dimensional code tape is an optical tape in which position information data bits are divided and printed in a two-dimensional manner at a high density on a small area. When a two-dimensional code tape is used instead of the magnetic tape 30, position information in the length direction of the two-dimensional code tape is used. The optical two-dimensional code position (distance) sensor includes a reading head that is a reading unit that optically reads position information (for example, a data matrix code) recorded on a two-dimensional code tape. As this optical two-dimensional code position (distance) sensor, for example, a data matrix positioning sensor PCV manufactured by P & F Corporation can be used.

  (3) Furthermore, the following may be used as detection means for detecting the absolute position of the upper car 14 and the lower car 16 in the vertical direction with respect to the outer car frame 12.

(A) Laser distance sensor TOF (Time Of Flight) method (measures the time until the light (laser light) emitted from the light source is reflected by the object to be measured and returns, and is calculated from the light source by calculation processing. You may use the laser distance sensor of the measurement system converted into the distance to an object.

  Two laser distance sensors are prepared, one is installed in the upper car 14 and the other is installed in the lower car 16. Then, as a measurement object common to the two laser distance sensors, one laser reflector is fixed to a specific position in the vertical direction of the outer car frame 12, for example, the upper beam 12A or the lower beam 12B. Then, the distance to the laser reflector is measured by two laser distance sensors. The distance to be measured is the vertical distance between the upper car 14 and the lower car 16 from a specific position in the vertical direction of the outer car frame 12 (in this example, the upper beam 12A or the lower beam 12B). Since it is nothing but the absolute position in the vertical direction of the lower car 16 with respect to the outer car frame 12, it can be used as the detection means.

  The laser reflecting plate is not limited to the upper beam 12A and the lower beam 12B, and may be fixed to other parts of the outer cage frame 12.

  The laser reflector may be fixed to each of the upper car 14 and the lower car 16, and the laser distance sensor may be provided on the upper beam 12A or the lower beam 12B.

(B) Ultrasonic distance sensor Detects the distance to the measurement object by transmitting the ultrasonic wave toward the measurement object and receiving the reflected wave (time and sound speed required from transmission to reception of the ultrasonic wave) (The distance from the sensor to the measurement object is calculated based on the above) and an ultrasonic distance sensor may be used.

  The usage mode of the ultrasonic distance sensor as the detection means is the same as that of the laser distance sensor. That is, an ultrasonic distance sensor is installed in each of the upper car 14 and the lower car 16, and a sound wave reflector is fixed to the upper beam 12A or the lower beam 12B, for example, as a measurement object common to both ultrasonic distance sensors. Then, the distance to the sound wave reflecting plate is measured by both ultrasonic distance sensors.

  It should be noted that (i) the sound wave reflection plate is not limited to the upper beam 12A and the lower beam 12B, and may be fixed to other parts of the outer car frame 12, and (ii) the sound wave reflection plate may be fixed to the upper car 14 and the lower car. It is the same as the case where the laser distance sensor is used that the ultrasonic beam distance sensor may be fixed to each of the cars 16 and the ultrasonic beam distance sensor 12A or the lower beam 12B may be provided.

  In addition to the laser distance sensor and the ultrasonic distance sensor, other types of distance sensors such as an infrared distance sensor may be used.

  (4) In the above embodiment, one end of the wire rope 20 that is folded around the driven sheave 18 (FIG. 1) or the drive sheave 76A (FIG. 10) is directly connected to the upper cage 14, and the other end is The upper car 14 and the lower car 16 are suspended by being directly connected to the car 16, but the manner of hanging the upper car 14 and the lower car 16 by the wire rope is not limited to this, for example, one end of the wire rope (The first end) and the other end (the second end) are respectively fixed to the outer car frame, the first moving pulley is hung on the wire rope portion from the drive sheave to the first end, and the second Hang the second moving pulley on the wire rope part that reaches the end, connect the upper car to the first moving pulley, and connect the lower car to the second moving pulley. It does not matter even if it is configured to be hung.

  FIG. 11 (Modification 1) and FIG. 12 (Modification 2) are conceptual diagrams of roping in the case of such a suspended configuration. In describing the suspension mode, if an actual layout diagram in which the upper cage and the lower cage are arranged in the vertical direction is used, the handling of the wire rope becomes very complicated, which hinders understanding. In FIG. 12, for the sake of convenience, the upper car 81 and 96 and the lower car 82 and 98 are arranged side by side.

  (A) In the first modification shown in FIG. 11, the first end 79A and the second end 79B of the wire rope 79 hung on the drive sheave 78A of the auxiliary hoisting machine 78 are folded into an outer cage frame (the whole (Not shown) fixed to the outer cage member 80, and the upper cage 81 is suspended from the drive sheave 78A on the first end 79A side, and the lower cage 82 is suspended on the second end 79B side. It is. The first end 79A and the second end 79B are not limited to the same outer cage member, and may be fixed to different outer cage members depending on the handling of the wire rope.

  As shown in FIG. 11, the wire rope 79 portion from the drive sheave 78 </ b> A to the first end 79 </ b> A includes a fixed pulley 83 fixed to the outer car member 80 and moving pulleys 84 and 85 attached to the upper car 81. It is being handed over. On the other hand, a portion of the wire rope 79 extending from the drive sheave 78A to the second end 79B is also spanned between a fixed pulley 86 fixed to the outer car member 80 and movable pulleys 87 and 88 attached to the lower car.

  In the above configuration, when the drive sheave 78A is rotationally driven, the upper car 81 and the lower car 82 move the same distance in opposite directions in the vertical direction.

  In this case, with the driving sheave 78A as the center, the upper car 81 and the lower car 82 are both roping suspended through two moving pulleys 84 and 85 and moving pulleys 87 and 88, respectively. Therefore, assuming that the peripheral speed of the drive sheave 78A (the traveling speed of the wire rope 79) is S and the moving speed of the upper and lower cars 81 and 82 is K, S and K have the relationship of S: K = 4: 1. Become. In other words, when the length of the wire rope 79 fed out from the drive sheave 78A (drawn into the drive sheave 78A) is LR and the movement distance of the upper and lower cages 81 and 82 is LK, LR and LK Is a relationship of LR: LK = 4: 1.

  Accordingly, in the case of the configuration in which the roping is performed as shown in FIG. 11, in this example, the difference ΔU between the time-dependent position U2 of the upper car 81 and the calculated estimated position Us obtained by the above equation (3) The amount of elongation of the wire rope 79 is not the amount of elongation of the wire rope 79, but 4ΔU, which is four times the amount of elongation, is the amount of elongation of the wire rope 79.

  Therefore, in the case of this example, the CPU 68 of the sub-control device 66 stores 4ΔU in the extension amount storage area 723 (FIG. 5 (f)) of the RAM 72 as the extension amount ΔR of the wire rope 79.

Here, the upper cage (upper cage 14, upper cage) is re-applied to one end of the wire rope (wire rope 20, wire rope 79) hung on the sheave (the driven sheave 18, drive sheave 76A, drive sheave 78A). 81), and the lower car (lower car 16, lower car 82) is hung on the other end side, the ratio of the moving speed K of the upper and lower cars to the circumferential speed S of the sheave is the reduction ratio G. (= S / K).
Then

          ΔR = G × ΔU (4)

It becomes.
In the case of Embodiment 1 (Embodiment 2), since the reduction ratio G = 1, ΔU calculated by the equation (3) is directly ΔR (= 1 × ΔU). On the other hand, in the case of the modified example 1, since the reduction ratio G = 4, ΔR = 4ΔU.

  Further, as is clear from the above description, half of the difference ΔU (formula (3)) between the time-dependent position U2 of the upper car 14 and the calculated estimated position Us is the current displacement amount.

  Therefore, when the current displacement amount is expressed by the elongation amount ΔR, from the equation (4),

          Current displacement amount = (ΔU / 2) = {(ΔR / G) / 2} (5)

  It becomes.

  In the case of Embodiment 1 (Embodiment 2), since the reduction ratio G = 1, the current displacement amount = (ΔR / 2) (FIG. 9, step S32). On the other hand, in the case of Modification 1, since the reduction ratio is 4, the current displacement amount = (ΔR / 8). Therefore, in the modification process of the target stop position (target rotation angle) of the outer car frame 12 in Modification 1, the correction rotation amount ΔE corresponding to the current displacement amount (= (ΔR / 8)) is calculated (FIG. 9, step S32), the corrected target rotation angle Eh (= E + ΔE) is set by the corrected rotation amount ΔE and the target rotation angle E (FIG. 9, step S33) read from the lifting table 640 (FIG. 4). (FIG. 9, step S34).

  (B) In the second modification shown in FIG. 12, similarly to the first modification, the first end portion 92A and the second end portion 92B of the wire rope 92 that are hung on the drive sheave 90A of the auxiliary hoisting machine 90 and turned back are used. It is fixed to an outer car member 94 which is a constituent member of an outer car frame (the whole is not shown), and an upper car 96 is hung from the drive sheave 90A on the first end 92A side, and a lower car 98 is hung on the second end 92B side. This is a lowered configuration. The first end 92A and the second end 92B are not limited to the same outer cage member, and may be fixed to different outer cage members depending on the handling of the wire rope.

  As shown in FIG. 12, the wire rope 92 portion from the drive sheave 90A to the first end 92A has fixed pulleys 100 and 102 fixed to an outer car member 94 and movable pulleys 104 and 106 attached to an upper car 96. , 108. On the other hand, the portion of the wire rope 92 extending from the drive sheave 90A to the second end 92B is also hung on the fixed pulleys 110, 112 fixed to the outer cage member 94 and the movable pulleys 114, 116, 118 attached to the lower cage 98. Has been passed.

  In the above configuration, when the driving sheave 90A is rotationally driven, the upper car 96 and the lower car 98 move the same distance in opposite directions in the vertical direction.

  In this case, with the driving sheave 90A as the center, the upper car 96 and the lower car 98 are both suspended by three moving pulleys 104, 106, 108 and moving pulleys 114, 116, 118, respectively. Therefore, the reduction ratio G = 6.

  Therefore, in the case of the modification 2, based on the above formula (4), the value obtained by multiplying ΔU obtained by the above formula (3) by 6 is used as the stretch amount ΔR, and the stretch amount storage area 723 of the RAM 72 (FIG. 5 (f)). Is remembered.

  Further, the current displacement amount corresponding to the elongation amount ΔR is calculated from the above equation (5), and the corrected rotation amount ΔE corresponding to the current displacement amount (= (ΔR / 12)) is calculated (FIG. 9, step S32). The corrected target rotation angle Eh (= E + ΔE) is set by the corrected rotation amount ΔE and the target rotation angle E (FIG. 9, step S33) read from the lifting table 640 (FIG. 4) (FIG. 9, Step S34).

  (C) In the first and second modifications, a plurality of (two or three in the above example) moving pulleys are hung between the two fixed ends of the wire rope hung on the drive sheave. Although the upper car or the lower car is connected to these moving pulleys, the number of moving pulleys provided between the fixed ends of the wire rope hung on the drive sheave may be one.

In this case, since the above reduction ratio is G = 2, based on the above equation (4), the value obtained by doubling ΔU obtained by the equation (3) is set as the elongation amount ΔR, and the expansion amount storage area 723 of the RAM 72 is used. (FIG. 5 (f)).
Further, the current displacement amount corresponding to the elongation amount ΔR is (ΔR / 4) from the above equation (5).

  (5) In the second embodiment and the first and second modifications, the wire ropes 20, 79, which are hung on the drive sheaves 76A, 78A, 90A provided above the upper cages 14, 81, 96 and folded downward. The upper car 14, 81, 96 is hung on one end side of 92, and the lower car 16, 82, 98 is hung on the other end side (FIGS. 10, 11, and 12). For example, as in Modification 3 shown in FIG. 13, a drive sheave 120A (sub hoisting machine 120) is provided below the lower car 122, and a wire rope 124 hung on the drive sheave 120A is folded upward to provide a wire rope. It is also possible to suspend the upper car 126 at one end of 124 and suspend the lower car 122 at the other end. FIG. 13 is a diagram similar to FIGS. 11 and 12.

  In Modification 3, the first end portion 124A and the second end portion 124B of the wire rope 124 that are folded around the drive sheave 120A of the auxiliary hoisting machine 120 are constituted by components of an outer cage frame (the whole is not shown). It is fixed to a certain outer car member 128, and the upper car 126 is suspended from the drive sheave 120A on the first end 124A side, and the lower car 122 is suspended on the second end 124B side. The first end portion 124A and the second end portion 124B are not limited to the same outer cage member, and may be fixed to different cage members depending on the handling of the wire rope.

  As shown in FIG. 13, the wire rope 124 portion from the drive sheave 120A to the first end 124A includes a fixed pulley 130 fixed to the outer car member 128 and two movable pulleys 132 attached to the upper car 126. 134. On the other hand, the portion of the wire rope 124 extending from the drive sheave 120A to the second end 124B is also spanned between a fixed pulley 136 fixed to the outer cage member 128 and two movable pulleys 138 and 140 attached to the lower cage 122. Has been.

  In the above configuration, when the drive sheave 120A is rotationally driven, the upper car 126 and the lower car 122 move in the opposite direction in the opposite direction in the same distance.

  The drive sheave is provided above the upper car in Embodiment 2 and Modifications 1 and 2, and is provided below the lower car in Modification 3, but the drive sheave is not limited to this. In the vertical direction, it may be provided between the upper car and the lower car, or the upper car and the lower car. Whether the wire rope is folded upward or downward with respect to the drive sheave is determined by the positional relationship with the pulley and the like, and is not limited to the examples shown so far.

  (6) In the above embodiment, the elongation amount ΔR of the wire rope 20 is calculated from the initial positions U1 and L1 and the time-lapse positions U2 and L2 by the equations (1), (2), (3), and (4). The current displacement amount was calculated and obtained from the elongation amount ΔR (step S32 (FIG. 9), equation (5)), but not limited to this, from the initial positions U1, L1 and the time-lapse positions U2, L2, the following is described. As described above, the current displacement amount may be directly acquired.

  In the double deck elevator 10 (FIG. 1) of the first embodiment, as described above, when the upper car 14 and the lower car 16 are moved in the vertical direction by the moving unit 22, the upper car 14 and the lower car 16 are respectively Move the same distance up and down.

  Therefore, when the scale value read by the reading unit 32 (upper car 14) increases, the scale value read by the reading unit 34 (lower car 16) decreases by the increment, and conversely, the reading unit 32 ( When the scale value read by the upper car 14) decreases, the scale value read by the reading unit 34 (lower car 16) increases by the decrease.

  Accordingly, assuming that the wire rope 20 does not stretch, the total scale value read simultaneously by the reading unit 32 and the reading unit 34 is always a constant value.

  When elongation occurs in the wire rope 20, each of the upper car 14 and the lower car 16 is displaced downward relative to the outer car frame 12. The sum of the displacement amounts of the upper car 14 and the lower car 16 appears as a difference between the value (U1 + L1) and the value (U2 + L2). Therefore, half of the sum is the current displacement amount (referred to as “ΔH”).

          Current displacement amount ΔH = {(U1 + L1) − (U2 + L2)} / 2 (6)

  The same applies to Embodiment 2 (FIG. 10), Modification 1 (FIG. 11), Modification 2 (FIG. 12), and Modification 3 (FIG. 13).

  Therefore, in the first embodiment, the second embodiment, the first modification, the second modification, and the third modification, the current displacement amount is directly calculated from the initial positions U1 and L1 and the time-lapse positions U2 and L2 based on the equation (6). Will be acquired.

  The raising / lowering control of the outer cage frame 12 when using the current displacement amount ΔH will be described based on the flowcharts shown in FIGS. 14 and 15.

  As shown in FIG. 14, the CPU 60 (FIG. 3) of the main control device 58 transmits a “current displacement amount transmission command” to the sub control device 66 (FIG. 3) (step S50). The timing for transmitting the “current displacement amount transmission command” to the sub-control device 66 transmits the “elongation amount transmission command” (FIG. 9, step S30). Of the above timings (a) to (e), (e) Is the timing. In other words, it is the timing immediately before the start of raising / lowering toward the next destination floor while it is going up / down from one destination floor to the next destination floor.

  As shown in FIG. 15, when the “current displacement amount transmission command” is received from the main control device 58 (YES in step S40), the CPU 68 (FIG. 3) of the sub control device 66 executes steps S41, S42, and S43. To do. Steps S41, S42, and S43 are the same processes as steps S21, S22, and S23 of FIG.

  When step S43 ends, the initial position storage areas 701 and 702 (FIG. 5B) of the ROM 70 (FIG. 3) of the sub-control device 66 and the time-dependent position storage areas 721 and 722 (FIG. 5 (FIG. 5)). c)) stores U1, L1, U2, and L2, respectively (FIG. 5 (d) and FIG. 5 (e)).

The sub-control device 66 calculates the current displacement amount ΔH from U1, L1, U2, and L2 by the above equation (6) (step S44). Thus, Steps S12, S13 (FIG. 6), Steps S42, S43, and S44 function as current displacement amount acquisition means.
The current displacement amount ΔH acquired by the calculation is transmitted to the main controller 58 (step S45).

  Returning to FIG. 14, when the CPU 60 (FIG. 3) of the main control device 58 receives the current displacement amount ΔH from the sub-control device 66 (YES in step S51), the corrected rotation amount ΔE corresponding to the received current displacement amount ΔH. Is calculated (step S52).

  Thereafter, steps S34 to S37 are executed to raise and lower the outer car frame 12 to the destination floor. Steps S34 to S37 shown in FIG. 14 are the same as steps S33 to S37 of FIG. 9 already described, and therefore the same step numbers as in FIG. 9 are given in FIG.

  In the first and second embodiments, the magnetic tape 30 is attached in a direction in which the scale is graduated from the bottom to the top (that is, in the direction in which the scale value increases toward the upper side). Since the current displacement amount ΔH is calculated as a negative value when mounted in a direction in which the scale is graduated from top to bottom (that is, the lower side, the direction in which the scale value increases), The absolute value | ΔH | is used for raising / lowering control of the outer car frame 12. Even in this case, if the equation for obtaining the current displacement amount ΔH is expressed by the following equation (7), the value can be used as it is without taking an absolute value.

          Current displacement amount ΔH = {(U2 + L2) − (U1 + L1)} / 2 (7)

  (7) In the first embodiment, the jack type is used as a method for moving the upper car and the lower car in the vertical direction. However, the invention is not limited to this, and the traction type as in the second embodiment and the first, second, and third modifications May be adopted. On the contrary, in the second embodiment and the first, second, and third modifications, a jack type may be adopted.

  (8) In the above-described embodiment, there are four car intervals to be adjusted (D1, D2, D3, D4), but it is needless to say that the present invention is not limited to this. Two, three, or five or more can be set according to the design of the building where the double deck elevator is installed. Alternatively, a car interval D to be adjusted may be set for every floor in the building. For example, in the case of a 10-story building, the car interval D is set to 9 (D1 to D9). This is because the floor height in a building does not necessarily match the design drawing.

  The double deck elevator according to the present invention can be suitably used, for example, as an elevator installed in a building with uneven floor height.

10,74 Double deck elevator 12 Outer car frame 14 Upper car 16 Lower car 18 Driven sheave 20 Wire rope 22 Moving unit 28 Magnetic linear scale 58 Main controller 66 Sub controller 76 Sub hoist 76A Drive sheave

Claims (5)

The upper cage hung on one end of the cord-like body folded on the sheave and the outer car frame provided on the inner side of the lower cage suspended on the other end reach the target stop position in the hoistway A double deck elevator that is moved up and down to land the upper car and the lower car on each destination floor,
A car interval adjusting means for adjusting a car interval in the vertical direction of the upper car and the lower car to a floor height of two upper and lower destination floors;
The upper cage suspended from the current cage and the upper cage suspended from the cable in the initial state at any position in the vertical direction of the outer cage frame Displacement amount acquisition means for acquiring the downward displacement amount of the lower car;
Target stop position correction means for correcting the target stop positions corresponding to the two destination floors upward by the amount of displacement acquired by the displacement amount acquisition means; and
A double deck elevator characterized by comprising: The displacement amount acquisition means includes
Including a magnetic linear scale for detecting an absolute position in the vertical direction of the upper car and the lower car with respect to the outer car frame;
The absolute position of the upper cage and the lower cage detected by the magnetic linear scale in the cord in the initial state, and the magnetic linear scale detected in the current cage. The double deck elevator according to claim 1, wherein the displacement amount is acquired based on the absolute position. The magnetic linear scale includes a magnetic tape stretched vertically on the outer car frame, a first reading unit that is attached to the upper car and reads the scale of the magnetic tape that indicates the absolute position; A second reading unit attached to the lower cage and reading a scale of the magnetic tape indicating the absolute position;
The displacement amount acquisition means includes
The total of the scale read by the first reading unit and the scale read by the second reading unit in the cord in the initial state, and the first reading in the current cord in the current state. The double deck elevator according to claim 2, wherein a difference between a scale read by the unit and a total of the scale read by the second reading unit is acquired as the displacement amount.   The displacement amount acquisition means acquires the displacement amount immediately before the raising and lowering of the outer car frame starts from the destination floor on which the upper car and the lower car are respectively landed to the next destination floor. The double-deck elevator according to any one of claims 1 to 3.   The displacement amount acquisition means includes elongation amount acquisition means for acquiring an elongation amount of the current cord-like body from the initial state, and acquires the displacement amount from the extension amount. Double deck elevator as described in

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