JP6358117B2 - Double deck elevator - Google Patents

Description

  The present invention relates to a double deck elevator, and more particularly, to a technique for acquiring an extension amount of a cord-like body that suspends an upper car and a lower car in an outer car frame.

  A double-deck elevator installed in an outer car frame and having a two-story structure is superior in transportation capacity compared to an elevator composed of a single car. 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.

  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 cage is suspended from one end of a rope, which is a type of cord-like body, folded around a drive sheave and the lower cage is suspended from the other end. (Patent Document 1) is known.

  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.

  However, the rope that is always pulled by the weight of the upper cage and the lower cage is stretched over time, and if the amount of elongation of this rope increases too much, for example, if the lower cage is lowered to the maximum However, a situation occurs in which the car spacing corresponding to the maximum floor height cannot be secured.

  For this reason, it is necessary to maintain and manage the rope by periodically measuring the amount of stretch of the rope and cutting the rope by the amount of stretch or replacing it with a new rope. The amount of stretch of the rope may be measured by a worker in the hoistway during periodic inspections, but requires a lot of time and labor, and the measurement time is limited.

  Therefore, Patent Document 1 discloses a technique that can automatically measure the amount of rope elongation during operation of a double deck elevator.

  In the double deck elevator described in Patent Document 1, the measurement of the amount of rope elongation is executed in a diagnostic mode different from the normal mode. In the diagnosis mode, first, (1) the drive sheave is rotated in the second direction to move the upper car to the upper end position (reference position) in the outer car frame. Next, (2) the outer car frame is raised until the outer car frame is detected by the upper terminal detection device in the hoistway provided on the inner wall of the hoistway.

  A floor plate corresponding to the nearest floor closest to the upper end position detection device is provided in the hoistway, and a lower car floor position detector for detecting the floor plate is provided in the lower car. ing.

  And in patent document 1, during the raising of the outer car frame in the above (2), the upper end detecting device in the hoistway detects the outer car frame from the time when the lower car floor position detector detects the floor plate. By comparing the travel distance of the lower car up to the time of detecting the car (calculated by integrating the speed of the outer car frame with time) and the travel distance in the previous diagnosis mode, It is supposed to calculate the amount of rope elongation from time.

JP 2012-162361 A

  However, in the double deck elevator described in Patent Document 1, in order to obtain the amount of elongation of the rope that suspends the upper car and the lower car, after moving the upper car to the upper end position in the outer car frame, It is necessary to raise the outer car frame to the top of the hoistway.

  If the outer car frame is landing on the lowest floor of the building (the lowest part of the hoistway) at the start of the diagnostic mode, the outer car frame is moved to the uppermost part of the hoistway only to measure the amount of rope elongation. In particular, in a double deck elevator that is often installed in a high-rise building, it is not preferable from the viewpoint of energy saving when considering the power consumed during this period.

  In view of the above problems, the present invention provides a double deck elevator that can acquire the amount of extension of a cable-like body that suspends an upper car and a lower car in an outer car frame without raising and lowering the outer car frame. For the purpose.

  In order to achieve the above object, a double deck elevator according to the present invention has an upper car and a lower car inside an outer car frame that moves up and down in a hoistway, and is hooked on a sheave and folded back. A double deck elevator having a configuration in which the upper car is suspended on one end side and the lower car is suspended on the other end side, and the car interval for changing the car interval in the vertical direction of the upper car and the lower car A change means, an absolute position detection means for detecting an absolute position of the upper car and the lower car with respect to the outer car frame in the vertical direction, and the absolute position of the upper car detected by the absolute position detection means at the first time point Storage means for storing the position and the absolute position of the lower car, the absolute position of the upper car and the absolute position of the lower car detected by the absolute position detecting means at a second time after the first time, and ,Previous Calculation for calculating the amount of elongation generated in the cord during the period from the first time point to the second time point, based on the absolute position of the upper car and the absolute position of the lower car stored in the storage means And means.

  Further, the absolute position detecting means records absolute position information from one end to the other end, and a recording tape attached to the outer cage frame so that the length direction is vertical. An upper car position reading unit fixed to the upper car and reading the absolute position information from the recording tape; and a lower car position reading unit fixed to the lower car and reading the absolute position information from the recording tape; It is characterized by including.

  In this case, the recording tape is one of a magnetic tape and an optical tape.

  Alternatively, the absolute position detecting means is a distance sensor that detects the absolute position as a vertical distance from a specific position in the vertical direction of the outer car frame of the upper car and the lower car. To do.

  In this case, the distance sensor is a laser distance sensor or an ultrasonic distance sensor.

  Further, the calculating means is configured to calculate the absolute position stored in the storage means for one of the upper car and the lower car and the absolute position detected by the absolute position detecting means at the second time point. The absolute position of the other car at the second time point is estimated, and the extension amount is calculated based on the estimated absolute position and the other car absolute position detected by the absolute position detecting means at the second time point. It is characterized by that.

  According to the double deck elevator according to the present invention having the above configuration, the absolute value of the upper car detected at the first time point by the detecting means for detecting the absolute position of the upper car and the lower car with respect to the outer car frame in the vertical direction. The second position from the first time point based on the position and the absolute position of the lower car and the absolute position of the upper car and the lower car detected at a second time point after the first time point. Since the elongation amount generated in the cable-like body that suspends the upper cage and the lower cage is calculated during the time point of, the elongation amount can be acquired without raising and lowering the outer cage frame.

1 is a diagram illustrating a schematic configuration of a double deck elevator according to a first embodiment. It is a figure which shows a part of memory area in RAM 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 acquisition program performed in the said sub control apparatus. 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 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.

  Hereinafter, embodiments of a double deck elevator according to the present invention will be described with reference to the drawings.

<Embodiment 1>
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. And an outer car frame 12 having a substantially rectangular shape (in the vertical direction). In FIG. 1, a broken line with an arrow represents a control signal line connected between the devices.

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 a motor with an encoder (not shown) that detects the rotation angle of the output shaft, and controls the rotation angle (number of rotations) of the output shaft based on the output result from the encoder. 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.

  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.

  A pair of reference position sensors (not shown) for detecting that the lower car 16 is at the reference position in the vertical direction with respect to the outer car frame 12 are provided on the lower car 16 and the outer car frame 12. . As the reference position sensor, for example, a photoelectric sensor (not shown) composed of a light emitting element and a light receiving element can be used. By providing the light emitting element in the lower car 16 and providing the light receiving element in the outer car frame 12 at a position for receiving light emitted from the light emitting element when the lower car 16 is in the reference position, It can be detected whether or not the car 16 is located at the reference position.

  From the state in which the lower car 16 is at the reference position, the moving unit 22 moves the lower car 16 by a predetermined distance corresponding to each floor height of the target floor, thereby changing the car interval to the floor height of the target floor. Can be adjusted.

  However, a tension is always applied to the wire rope 20 that suspends the upper cage 14 and the lower cage 16, and because of this tension, the wire rope 20 is stretched over time. Even if 16 is moved from the reference position by the predetermined distance, a situation occurs in which the car interval does not match the floor height of the target floor. Therefore, it is necessary to grasp the amount of elongation of the wire rope 20 in order to correct the specified distance and adjust the car interval to the floor height of the target floor.

  Further, as described above, it is necessary to grasp the amount of elongation of the wire rope 20 for maintenance management in which the wire rope 20 is cut off or replaced with a new wire rope.

  Therefore, in the present embodiment, 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 are detected, and the extension amount of the wire rope 20 is obtained from the detection result as described later. Yes.

  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 and a magnetic tape 30 that are recording tapes in which absolute position (distance) information between one end and the other end is recorded as a magnetic pattern (magnetic scale) with a resolution of 0.5 mm. And two reading units 32 and 34 for reading the magnetic scale. 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.

  A sub-control device 36 is installed in the outer car frame 12. The sub-control device 36 includes a CPU 38 and a ROM 40 and a RAM 42 connected to the CPU 38. The ROM 40 stores various programs executed by the CPU 38.

  The RAM 42 is a non-volatile memory, and values of magnetic scales (hereinafter referred to as “scale values”) read by the reading units 32 and 34 of the magnetic scale 28 are respectively outside the upper car 14 and the lower car 16. The absolute position in the vertical direction with respect to the car frame 12 is stored. As shown in FIG. 2A, the RAM 42 stores initial position storage areas 421A and 422A for each of the reading unit 32 (upper car) and the reading unit 34 (lower car) as areas for storing the absolute position. Position storage areas 421B and 422B are provided. That is, the RAM 42 functions as a storage unit that distinguishes and stores the scale values (absolute positions) read by the reading units 32 and 34 of the magnetic scale 28. The initial position storage areas 421A and 422A and the time-lapse position storage areas 421B and 422B are storage areas provided in the RAM 42 according to the timing of reading by the reading units 32 and 34. The timing will be described later.

  Further, as shown in FIG. 2C, the RAM 42 is calculated as described below based on the absolute positions stored in the initial position storage areas 421A and 422A and the time-lapse position storage areas 421B and 422B. It has an elongation amount storage area 423 for storing the amount.

  Returning to FIG. 1, the CPU 38 executes various programs stored in the ROM 40, adjusts the car interval, and based on the scale values read by the reading units 32 and 34 of the magnetic scale 28, as described later, The amount of elongation of the rope 20 is calculated.

  As described above, the machine room 46 is provided above the hoistway 44 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 46 includes a hoisting machine 48. And a deflecting vehicle 50 is installed. A main rope 52 is hung on the sheave 48 </ b> A and the deflecting wheel 50 that constitute the hoist 48. The hoisting machine 48 has a hoisting machine motor (not shown) that rotationally drives the sheave 48A.

  The outer cage frame 12 is connected to one end of the main rope 52, and a counterweight 54 is connected to the other end.

  The machine room 46 is also provided with a main controller 56 that performs drive control of the hoisting machine motor of the hoisting machine 48. The main controller 56 has a configuration in which a RAM and a ROM are connected to the CPU. The CPU executes various control programs stored in the ROM so as to control the hoisting machine motor and the like, and the hoistway 44 of the smooth outer car frame 12 (upper car 14, lower car 16). The operation by the raising and lowering operation etc. is realized. The main control device 56 (or its CPU) issues an execution command for processing necessary for measuring the amount of elongation of the wire rope 20 to the sub control device 36 at a predetermined timing.

  Next, the elongation amount measurement process of the wire rope 20 executed by the sub-control device 36 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. 3, when an initial position acquisition command is received from the main controller 56 (YES in step S10), the CPU 38 (FIG. 1) of the sub controller 36 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 56 to the sub control device 36, 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 where the length of the wire rope 20 is adjusted to the reference length.

  Further, in order to obtain the elongation amount of the wire rope 20 over time, the initial position acquisition command may be issued at the following timing in order to remove other factors (disturbances) that cause the wire rope 20 to stretch. preferable. 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 38 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.

  Then, 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 421A and 422A (FIG. 2A) of the RAM 42 (step S13), and this program is terminated. To do. That is, the absolute positions read by the reading units 32 and 34 are stored in the initial position storage areas 421A and 422A at the timings (i) to (iii).

  Here, the absolute positions (scale values) respectively stored in the initial position storage areas 421A and 422A are hereinafter referred to as “initial positions”. The initial positions stored in the initial position storage areas 421A and 422A will be described below as “U1” and “L1” as shown in FIG.

  Next, an elongation amount acquisition process executed by the sub control device 36 will be described with reference to FIG.

  As shown in FIG. 4, when an elongation amount acquisition command is received from the main controller 56 (YES in step S20), the CPU 38 (FIG. 1) of the sub controller 36 determines whether the upper car 14 and the lower car 16 are stopped. It is confirmed whether or not (step S21). The elongation amount acquisition command is attached from the main control device 56 to the sub-control device 36 in a state where the length of the wire rope 20 shown in (i) to (iii) is adjusted to the reference length. For example, (a) the time when the double deck elevator 10 starts daily operation, (b) one week interval, (c) one month interval, etc. after the timing immediately after (first time) Issued at (second time). Further, the timing for issuing the elongation amount acquisition command is not limited to an equal time interval, and (d) for a while after the installation of the (i) double deck elevator 10 in the building is completed, or (iii) the wire rope 20 described above. 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 period, the time interval is shortened, and the time of the progress of the elongation decreases. It does not matter if the interval is increased.

  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 38 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.

  Then, the obtained absolute position of the upper car 14 and the absolute position of the lower car 16 are respectively stored in the temporal position storage areas 421B and 422B (FIG. 2A) of the RAM 42 (step S23). That is, in the time-lapse position storage areas 421B and 422B, the absolute positions read by the reading units 32 and 34 are stored by being overwritten at the timings (a) to (d).

  Here, the absolute positions stored in the temporal position storage areas 421B and 422B are hereinafter referred to as “temporal positions”. Further, the temporal positions stored in the temporal position storage areas 421B and 422B will be described below as “U2” and “L2” as shown in FIG.

Next, the CPU 38 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 421B and 422B 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 423 (FIG. 2C) of the RAM 42 as the elongation amount ΔR of the wire rope 20. (Step S27).

  That is, in the wire rope 20, the initial time position (scale value) of the upper cage 14 is subtracted from the estimated position (scale value) of the upper cage 14 when the wire rope 20 is not stretched. The amount of elongation generated in the wire rope 20 from the time of position detection (first time point) to the time of detection of time-dependent position (second time point) is calculated.

  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 423 (FIG. 2 (c)) of the RAM 42 as the extension amount ΔR of the wire rope 20.

  The extension amount stored in the extension amount storage area 423 of the RAM 42 is appropriately referred to when the moving unit 22 adjusts the car interval to the floor height of the target floor.

  In addition, a maintenance portable terminal (not shown) is connected to the sub-control device 36, and the extension amount is read from the RAM 42, and the read extension amount is displayed on the monitor screen of the portable terminal. Can know the amount of elongation of the wire rope 20. 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.

  Alternatively, the portable terminal may be connected to the main control device 56 so as to read out the elongation amount stored in the RAM 42 of the sub control device 36 from the main control device 56.

  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. That is, the extension amount of the wire rope 20 can be acquired without moving the outer car frame 12 up and down.

  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. That is, in the double deck elevator 10 according to the present embodiment, as in the double deck elevator described in Patent Document 1, the upper car is moved to a specific position within the outer car frame in the process of acquiring the wire rope elongation. There is no need to let them. For this reason, the elongation amount of the wire rope can be acquired immediately.

  Furthermore, in the double deck elevator described in Patent Document 1, it is necessary to raise the outer car frame regardless of the passenger transportation in order to acquire the amount of elongation of the wire rope. However, according to the double deck elevator 10 according to the present embodiment, such a problem does not occur.

  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 36 has executed processing necessary for obtaining the amount of elongation of the wire rope 20 in response to a command from the main control device 56, but the sub-control device 36 does not depend on the command from the main control device 56. The control device 36 itself may perform the acquisition processing of the elongation amount of the wire rope 20 at the timing.

<Embodiment 2>
The double deck elevator 10 according to the first embodiment is a jack type double deck elevator in which one of an upper car 14 and a lower car 16 (in this example, the lower car 14) is moved up and down by a screw type jack 24. However, in the double deck elevator 60 according to the second embodiment, as shown in FIG. 5, 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 62A of the hoisting machine 62 and rotates the drive sheave 62 with a motor 62B to change the car interval. In FIG. 5, a broken line with an arrow represents a control signal line connected between the devices.

  The double deck elevator 60 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. 5, 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 36 included in the double deck elevator 60 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 amount acquisition program executed by the CPU 38 of the sub-control device 36 are the same as those described based on the flowcharts shown in FIGS. The description is also omitted.

  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 is used. 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 causes elongation due to secular change.

(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.
The following 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 62A (FIG. 5) 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. 6 (Modified Example 1) and FIG. 7 (Modified Example 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. 7, for the sake of convenience, the upper car 76 and 96 and the lower car 78 and 98 are arranged side by side.

  (A) In Modification 1 shown in FIG. 6, the first end portion 72A and the second end portion 72B of the wire rope 72 that are hung on the drive sheave 70A of the auxiliary hoisting machine 70 are folded back into the outer cage frame (the whole is (Not shown) fixed to the outer cage member 74, and the upper cage 76 is suspended from the drive sheave 70A on the first end 72A side, and the lower cage 78 is suspended on the second end 72B side. It is. The first end portion 72A and the second end portion 72B are not limited to the same outer cage member, but may be fixed to different outer cage members depending on the handling of the wire rope.

  As shown in FIG. 6, the wire rope 72 portion from the drive sheave 70 </ b> A to the first end 72 </ b> A has a fixed pulley 80 fixed to the outer car member 74 and moving pulleys 82 and 84 attached to the upper car 76. It is being handed over. On the other hand, the portion of the wire rope 72 extending from the drive sheave 70A to the second end 72B is also spanned between a fixed pulley 85 fixed to the outer car member 74 and movable pulleys 86 and 88 attached to the lower car.

  In the above configuration, when the drive sheave 70A is rotationally driven, the upper car 76 and the lower car 78 move in the opposite direction in the opposite direction in the same distance.

  In this case, with the drive sheave 70A as the center, the upper car 76 and the lower car 78 are both roping suspended through two moving pulleys 82 and 84 and moving pulleys 86 and 88, respectively. Therefore, if the peripheral speed of the drive sheave 70A (the traveling speed of the wire rope 72) is S and the moving speed of the upper and lower cars 76 and 78 is K, S and K have the relationship of S: K = 4: 1. Become. In other words, when the length of the wire rope 72 fed out from the drive sheave 70A (drawn into the drive sheave 70A) is LR and the movement distance of the upper and lower cages 76 and 78 is LK, LR and LK Is a relationship of LR: LK = 4: 1.

  Therefore, in the case of the configuration in which the roping is performed as shown in FIG. 6, in this example, the difference ΔU between the time-dependent position U2 of the upper car 76 and the calculated estimated position Us obtained by the above equation (3) is not changed. The amount of elongation of the wire rope 72 is not the amount of elongation of the wire rope 72, but 4ΔU, which is four times the amount, becomes the amount of elongation of the wire rope 72.

  Therefore, in the case of this example, the CPU 38 of the sub-control device 36 stores 4ΔU in the extension amount storage area 423 (FIG. 2C) of the RAM 42 as the extension amount ΔR of the wire rope 72.

  Here, the upper cage (upper cage 14, upper cage) is re-applied to one end of the wire rope (wire rope 20, wire rope 72) hung on the sheave (follower sheave 18, drive sheave 62A, drive sheave 70A). 76) and the lower car (lower car 16, lower car 78) 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.

  (B) In the second modification shown in FIG. 7, as in the first modification, the first end 92 </ b> A and the second end 92 </ b> B of the wire rope 92 that is hung on the drive sheave 90 </ b> A of the auxiliary hoisting machine 90 are folded. 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. 7, the wire rope 92 portion from the drive sheave 90 </ b> A to the first end portion 92 </ b> A has fixed pulleys 100 and 102 fixed to the outer cage member 94 and movable pulleys 104 and 106 attached to the upper cage 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 modified example 2, based on the above formula (4), the value obtained by multiplying ΔU obtained by the formula (3) by 6 is defined as the stretch amount ΔR, and the stretch amount storage area 423 of the RAM 42 (FIG. 2C). Is remembered.

  (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 above equation (3) is set as the elongation amount ΔR, and the expansion amount storage area 423 of the RAM 42 is used. (FIG. 2 (c)).

  (5) In Embodiment 2 and Modifications 1 and 2, the wire ropes 20, 72, hung downward on the drive sheaves 62A, 70A, 90A provided above the upper cages 14, 76, 96 The upper car 14, 76, 96 is hung on one end side of 92, and the lower car 16, 78, 98 is hung on the other end side (FIGS. 5, 6, and 7). For example, as in Modification 3 shown in FIG. 8, a drive sheave 120A (sub hoisting machine 120) is provided below the lower car 120, and the 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. 8 is a diagram similar to FIGS. 6 and 7.

  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. 8, the wire rope 124 portion from the drive sheave 120A to the first end portion 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 described so far.

  (6) In the first embodiment, the jack type is used as a method of 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 modified examples is used. May be adopted. On the contrary, in the second embodiment and the first, second, and third modifications, a jack type may be adopted.

  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, 60 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 36 Sub controller 38 CPU
42 RAM
62A drive sheave 62B motor

Claims (6)

There is an upper car and a lower car inside the outer car frame that goes up and down in the hoistway. The upper car is hung on one end side of the cord-like body folded on the sheave and the lower car on the other end side. A double deck elevator having a configuration in which a car is suspended,
A car interval changing means for changing the car interval in the vertical direction of the upper car and the lower car;
Absolute position detecting means for detecting the absolute position of the upper car and the lower car with respect to the outer car frame in the vertical direction;
Storage means for storing the absolute position of the upper car and the absolute position of the lower car detected by the absolute position detection means at the first time point;
The absolute position of the upper car and the absolute position of the lower car detected by the absolute position detection means at a second time after the first time, and the absolute position of the upper car stored in the storage means And a calculating means for calculating the amount of elongation generated in the cord-like body from the first time point to the second time point based on the absolute position of the lower car;
A double-deck elevator characterized by comprising: The absolute position detecting means includes
Recording absolute position information from one end to the other end, a recording tape attached to the outer cage frame so that the length direction is the vertical direction,
An upper cage position reading unit fixed to the upper cage and reading the absolute position information from the recording tape;
A lower car position reading unit fixed to the lower car and reading the absolute position information from the recording tape;
The double deck elevator according to claim 1, comprising:   The double deck elevator according to claim 2, wherein the recording tape is one of a magnetic tape and an optical tape. The absolute position detecting means includes
2. The double deck according to claim 1, wherein the absolute position is a distance sensor that detects the upper car and the lower car as a vertical distance from a specific position in the vertical direction of the outer car frame. elevator.   The double deck elevator according to claim 4, wherein the distance sensor is a laser distance sensor or an ultrasonic distance sensor. The calculating means includes
From the absolute position stored in the storage means and the absolute position detected by the absolute position detection means at the second time point for one of the upper car and the lower car, the other car at the second time point The absolute position of the car is estimated, and the extension amount is calculated based on the estimated absolute position and the other absolute position of the car detected by the absolute position detecting means at the second time point. The double deck elevator of any one of 1-5.

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