JP2017154860A - Double deck elevator - Google Patents

Abstract

To provide a double deck elevator capable of raising and lowering both of two cars with a single hoisting machine and adjusting the distance between the cars even during the raising and lowering. A first end 18A of a first rope 18 as a first cable-like body for suspending a lower car 14 as a first car is used as a fixed end, and a second end side is used for raising and lowering the car. A first end portion of the second rope 20 that is a second cable-like body that hangs around the main sheave 284 of the main hoisting machine 28 and suspends the upper car 16 that is the second car is used for adjusting the distance between the cars. The secondary sheave 324 of the secondary hoisting machine 32 is wound around, and the second end side is wound around the main sheave 284 of the main hoisting machine 28. [Selection] Figure 1

Description

  The present invention relates to a double deck elevator, and more particularly, to a double deck elevator having a configuration for adjusting the vertical distance between two cars provided vertically in a hoistway.

  In a double deck elevator installed in a building with uneven floor height, the two cars (hereinafter referred to as “upper car” and “lower car”) are matched to the height of the two floors to be landed simultaneously. ) In the vertical direction (hereinafter referred to as “cage interval”) must be adjusted. As a double-deck elevator that enables this adjustment, FIGS. 1 to 5 of Patent Document 1 and FIG. 4 of Patent Document 2 connect a first end of a wire rope to an upper car and a second end. And a driven sheave provided on the first drive sheave and counterweight of the first hoisting machine between the first end and the second end. And what has the structure spanned by the 2nd drive sheave of the 2nd winding machine (henceforth "the 1st elevator") is indicated.

  Further, in FIG. 1 of Patent Document 2, a first wire rope for connecting an upper car and an upper car counterweight is wound around a first drive sheave of the first hoisting machine and is used for a lower car and a lower car. A double deck elevator (hereinafter referred to as “second elevator”) having a configuration in which a second wire rope for connecting a counterweight is wound around a second drive sheave of a second hoisting machine is disclosed. Yes.

  Both the first and second elevators can simultaneously raise and lower the upper car and the lower car by simultaneously driving the first hoisting machine and the second hoisting machine. Further, since the first hoisting machine and the second hoisting machine can be driven and controlled separately, in one elevating operation, the upper car elevating speed by the first hoisting machine and the second hoisting machine are used. By providing a difference in the ascending / descending speed of the lower car, the car interval can be adjusted as a result. In other words, while the upper and lower cars reach from one stop floor to the next stop floor (during lifting / lowering), the car interval can be adjusted according to the height of the destination floor.

  However, because the upper car and the lower car are raised and lowered separately in the first hoisting machine and the second hoisting machine, in order to prevent an unexpected collision between the upper car and the lower car, The control of the machine and the second hoisting machine becomes complicated.

  On the other hand, FIG. 5 of Patent Document 2 refers to a double deck elevator (hereinafter referred to as “third elevator”) that can simultaneously lift and lower both the upper car and the lower car with a single hoisting machine. ) Is disclosed. The third elevator connects the first end of the wire rope to the upper car, connects the second end to the lower car, and extends from the first end to the second end. The wire rope is stretched over the drive sheave of the hoisting machine, the drive sheave of the hoisting machine for adjusting the floor height provided in the counterweight, and the driven sheave.

  According to the third elevator, since the up and down speeds of the upper car and the lower car are inevitably approximately equal because the upper car and the lower car are raised and lowered by a single hoisting machine, complicated control is performed. Unnecessary collision between the upper car and the lower car during raising and lowering can be prevented.

  In addition, in the third elevator, “a single hoisting machine moves up and down between the floors of the upper car and the lower car, and the hoisting machine for adjusting the floor height is fixed with a brake during that time. It has become so. Then, after both cars arrive at the target floor and the upper car stops at the predetermined landing position, the brake of the hoisting machine for adjusting the floor height is released, and the rotation of the hoisting machine for adjusting the floor height is controlled. To adjust the floor height of the lower car. (Patent Document 2 paragraph [0042]).

JP 2001-310883 A JP-A-2005-231807

  In the third elevator, the middle part of the wire rope that connects the upper car and the lower car is wound around the drive sheave of the hoist for adjusting the floor height, so that the upper and lower cars on which the wire rope runs are moving up and down. It is difficult to adjust the car interval. For this reason, after the upper car has landed at a predetermined position, the car interval is adjusted as described above. Compared to the case where the car interval can be adjusted during raising and lowering as in the first and second elevators. As a result, the time required for passengers to get in and out of the destination floor from the start of raising and lowering becomes longer.

  In view of the above-described problems, an object of the present invention is to provide a double deck elevator that can raise and lower both two cars with a single hoisting machine and can adjust the distance between the cars even during the raising and lowering. To do.

  In order to achieve the above object, a double deck elevator according to the present invention is a double deck elevator having two cars spaced apart in the vertical direction in a hoistway provided in a building, A first cable that suspends a first car of the two cars, a second cable that suspends a second car of the two cars, and a main sheave. A car hoisting machine for raising and lowering the car, and an auxiliary hoisting machine for adjusting the car interval having a secondary sheave, the first end of the first cable-shaped body being a fixed end, An end portion is wound around the main sheave, and the first car is suspended between the first end portion of the first cord-like body and a portion wound around the main sheave. The first end portion side of the second cord-like body is wound around the secondary sheave, The end side is wound around the main sheave, and the second cord-like body is between the portion wound around the sub sheave and the portion wrapped around the main sheave. It is characterized in that two cars are suspended.

  The auxiliary hoisting machine is a hoisting type hoisting machine.

  Alternatively, the auxiliary hoisting machine is a traction type hoisting machine, and a counterweight for adjusting a car interval is attached to the second cord-like body portion that hangs down from the auxiliary sheave to the opposite side of the second car. Is suspended.

  In this case, it has a position detecting means for detecting the position in the vertical direction of the counterweight for adjusting the car interval that moves up and down with the rotation of the sub sheave.

  According to the double deck elevator configured as described above, the second end portion of the first cord-like body that suspends the first car on the main sheave constituting the main hoisting machine for raising and lowering the car. And the second end side of the second cord-like body that suspends the second cage is wound around, so that the second car and the second cage are rotated by rotating the main sheave. Both baskets can be raised and lowered at the same time. That is, the first and second cars can be raised and lowered by a single hoisting machine (main hoisting machine).

  In addition, since the first end side of the second cable-like body that suspends the second car is wound around the sub sheave constituting the sub hoist for adjusting the car interval, Adjusting the car spacing between the first car and the second car by rotating the secondary sheave to move the second car relatively close to or away from the first car. Can do. In this case, the second sheave is wound around the second sheave regardless of whether the first and second cars are stopped or lifted. Since it is the said 1st end part side of a cable-like body, the said cage | basket | car space | interval can be adjusted not only while the said 1st and 2nd cage | basket | car stops but during raising / lowering.

1 is a diagram illustrating a schematic configuration of a double deck elevator according to a first embodiment. (A), (b) is the main hoisting machine and the main control device for controlling the main hoisting machine, and the auxiliary hoisting machine and the auxiliary hoisting machine in Embodiments 1, 2, and 3, respectively. It is the block diagram which showed the sub-control apparatus which controls a machine. It is a figure which shows schematic structure of the double deck elevator which concerns on Embodiment 2. FIG. It is a figure which shows schematic structure of the double deck elevator which concerns on Embodiment 3. FIG. (A) is a top view which shows a part of position detection means provided in the double deck elevator of Embodiment 3, (b) is one of the double deck elevators provided with the position detection means concerning a modification. FIG.

  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 two cars 14 and 16 provided in a hoistway 12 provided in a building and spaced apart in the vertical direction. Of the two cars 14 and 16, the lower car is referred to as the lower car 14, and the upper car is referred to as the upper car 16.

  The lower car 14 has a lower car room 142 and a movable pulley 144 provided on the lower side of the lower car room 142, and the upper car 16 is provided on the lower side of the upper car room 162 and the upper car room 162. And a movable pulley 166.

  The lower cage 14 is suspended by a first rope 18 made of a wire rope that is a cord-like body, and the upper cage 16 is suspended by a second rope 20 that is also made of a wire rope. The manner of spanning the first rope 18 and the second rope 20 will be described later.

  The hoistway 12 is also provided with a main counterweight 22 that is suspended by both the first rope 18 and the second rope 20. The main counterweight 22 includes a main body 222 and a movable pulley 224 provided on the upper side of the main body 222.

A main hoisting machine 28 for raising and lowering the lower car 14 and the upper car 16 is installed in a machine room 26 provided above the hoistway 12 with a ceiling wall 24 therebetween. The main hoisting machine 28 includes a main motor 282 (FIG. 2A), a main sheave 284 provided on an output shaft (not shown) of the main motor 282, and a rotary encoder 286 provided coaxially with the output shaft. Etc.
A baffle 30 is installed adjacent to the main hoist 28.

  The machine room 26 is also provided with a secondary hoisting machine 32 for adjusting the vertical distance between the lower car 14 and the upper car 16 (hereinafter referred to as “cage distance”). Here, the car interval refers to the distance (D) in the vertical direction between the floor surface 142A of the lower car room 142 and the floor surface 162A of the upper car room 162. 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.

  The auxiliary hoisting machine 32 is a hoisting type hoisting machine. The auxiliary hoisting machine 32 is provided coaxially with the auxiliary motor 322 (FIG. 2 (a)), the auxiliary sheave 324 that is provided on the output shaft (not shown) of the auxiliary motor 322, and the output shaft. A rotary encoder 326 and the like. As the rotary encoder 326, for example, a multi-turn absolute type can be used.

  Subsequently, a manner of extending the first rope 18 and the second rope 20 will be described. Hereinafter, in the first rope 18 that suspends the lower car 14 and the second rope 20 that suspends the upper car 16, the “first end side” refers to the lower car 14 (the movable pulley 144) and the upper car 16. (The second pulley 166) refers to all or part of the distance from the first end to the first end, and “second end side” refers to all or to the second end opposite to the first end It shall refer to a part. Therefore, although the range of the first end portion side and the second end portion side varies depending on the ascending / descending positions of the lower car 14 and the upper car 16, the following description is made mainly on the lower car 14 and the upper car 16. Therefore, there is no problem.

  First, the first rope 18 will be described. The first end 18 </ b> A of the first rope 18 is fixed to the floor of the machine room 26 by a fixing device 34. That is, the first end portion 18A of the first rope 18 is a fixed end fixed to the building (the machine room 26 floor). The first end 18 </ b> A is not limited to the machine room 26 floor, and may be fixed to another part of the building, for example, the ceiling of the hoistway 12 or the side wall of the hoistway 12.

  The second end portion side of the first rope 18 is wound around the main sheave 284 and is between the first end portion 18A (fixed end) of the first rope 18 and the portion wrapped around the main sheave 284. , The lower car 14 is suspended. The lower car 14 is suspended by the first rope 18 around the first pulley 18 wound around the movable pulley 144.

  The second end portion side of the first rope 18 that is wound around the main sheave 284 is further wound around the baffle wheel 30 and suspended, and is wound around the movable pulley 224 of the main counterweight 22 and folded upward. After that, the second end portion 18 </ b> B is fixed to the floor of the machine room 26 by the fixing device 36. The second end 18B is not limited to the machine room 26 floor, and may be fixed to other parts of the building, for example, the ceiling of the hoistway 12 or the side wall of the hoistway 12.

  Next, the second rope 20 will be described. The second rope 20 has a first end (not shown) fixed to the secondary sheave 324 and a part of the second rope 20 wound around the secondary sheave 324. That is, the first end portion side of the second rope 20 is wound around the secondary sheave 324. Further, the second end portion side of the second rope 20 is wound around the main sheave 284, and a portion wound around the sub sheave 324 and a portion wound around the main sheave 284 in the second rope 20. The upper cage 16 is suspended between the two. The upper cage 16 is hung by the second rope 20 with the second rope 20 wound around the movable pulley 166.

  The second end portion side of the second rope 20 wound around the main sheave 284 is further wound around the baffle wheel 30 and suspended, similarly to the first rope 18, and is wound around the movable pulley 224 of the main counterweight 22. After being hung and folded upward, the second end portion 20B is fixed to the floor of the machine room 26 by a fixing device 36. The second end 20B is not limited to the machine room 26 floor, and may be fixed to other parts of the building, for example, the ceiling of the hoistway 12 or the side wall of the hoistway 12.

  The lower car 14 suspended by the first rope 18 and the upper car 16 suspended by the second rope 20 are respectively provided by a guide rail for a car (not shown) provided in common for the two cars. Guided up and down. The main counterweight 22 suspended by the first rope 18 and the second rope 20 is guided in the vertical direction by a counterweight guide rail (not shown).

  In the double deck elevator 10 having the above configuration, when the main sheave 284 of the main hoisting machine 28 is rotationally driven in the direction of arrow A, the lower car 14 and the upper car 16 are raised and the main counterweight 22 is lowered. On the contrary, when it is rotationally driven in the direction of arrow B, the lower car 14 and the upper car 16 are lowered and the main counterweight 22 is raised.

  In this case, since the lower car 14 and the upper car 16 are moved up and down by a common (single) main hoist 28, the raising and lowering speeds of the lower car 14 and the upper car 16 are necessarily substantially equal. . Thereby, it is possible to prevent an unexpected collision between the upper car 14 and the lower car 16 during the raising / lowering operation of the upper car 14 and the lower car 16 without requiring complicated control.

  When the auxiliary sheave 324 of the auxiliary hoisting machine 32 is rotated in the direction of the arrow E, the upper car 16 is displaced in a direction relatively close to the lower car 14, and on the contrary, the arrow F Is rotated in a relatively spaced direction. As a result, the car interval D can be adjusted.

  In this case, the secondary hoisting machine 32 is provided on the first end side of the second rope 20 that is stationary regardless of whether the upper car 14 and the lower car 16 are stopped or lifted. Is taken up by the secondary sheave 324 (in the direction of arrow F) and is fed out from the secondary sheave 324 (in the direction of arrow E) to adjust the car interval D. Therefore, the state of the upper car 14 and the lower car 16 The car interval D can be adjusted regardless of whether the vehicle is stopped or lifted.

  Here, if the upper car 16 can be brought close to the lower car 14 without limitation, there is a risk that the upper car 16 and the lower car 14 will collide in an unexpected case. Therefore, even when all of the second ropes 20 wound up the longest by the secondary sheave 324 (for example, the state in which the car interval D is adjusted to the maximum interval) are fed out, the upper car 16 and the lower car 14 The longest take-up length is limited so as to prevent collision. Even if the second rope 20 is all drawn out from the secondary sheave 324, the upper cage 16 will not fall because the end of the second rope 20 is fixed to the secondary sheave 324.

In the machine room 26, a sub control device 38 and a main control device 40 are also installed.
The sub control device 38 controls the rotation of the sub motor 322 (FIG. 2A) based on the output signal (rotation angle information) from the rotary encoder 326 of the sub hoisting machine 32 and adjusts the car interval D.

  As shown in FIG. 2A, the sub control device 38 includes a CPU 382 and a ROM 384 and a RAM 386 connected to the CPU 382. The ROM 384 stores various programs executed by the CPU 382. The RAM 386 is a nonvolatile memory, and the RAM 386 stores the rotation angles E1, E2, E3, and E4 of the rotary encoder 326 in correspondence with the car intervals D1, D2, D3, and D4.

  The main control device 40 performs drive control of the main motor 282 of the main hoisting machine 28 and the like. The main controller 40 has a CPU 402 and a ROM 404 and a RAM 406 connected to the CPU 402. The CPU 402 executes various control programs stored in the ROM 404 to control the main motor 282 and the like, thereby realizing a smooth operation such as a lifting operation in the hoistway 12 of the lower car 14 and the upper car 16. To do.

  The main control device 40 (CPU 402) issues a car interval adjustment command to the sub control device 38 at a predetermined timing.

  The car interval adjustment command includes car interval information (any one of D1 to D4) corresponding to the floor heights of the two stop floors scheduled to be stopped next.

Receiving the car interval adjustment command, the sub-control device 38 reads the rotation angle (any of E1 to E4) corresponding to the car interval information (any of D1 to D4) included in the command from the RAM 386. The sub motor 322 is driven to rotate until the output signal (rotation angle information) from the rotary encoder 326 matches the read rotation angle (any of E1 to E4), and the sub motor 322 is stopped in a state of matching. Let As a result, the car interval is adjusted to the height of the two stop floors.
The predetermined timing is, for example, the time when the next stop floor is determined from the current stop floor.

  In addition, the raising / lowering control of the lower car 14 and the upper car 16 is made on the basis of the lower car 14. That is, as with a general single deck elevator (a single car elevator), the lower car 14 is controlled to move up and down and land on the destination floor. If the lower car 14 is landed on the destination floor of the lower car 14, the distance (the car distance D) with respect to the lower car 14 of the upper car 16 is properly adjusted during the raising and lowering. At the same time, it will be landed on the destination floor of the upper car 16.

  However, the adjustment of the car interval by the sub-control device 38 may be performed after the lower car 14 has landed on the target floor of the lower car 14, not during the raising / lowering of the lower car 14 and the upper car 16.

  As described above, according to the double deck elevator 10 according to the first embodiment, the single main hoisting machine 28 moves up and down both the two cars, the lower car 14 and the upper car 16, and the car. The car interval can be adjusted not only when the vehicle is stopped but also when the vehicle is moving up and down.

  In the third elevator, the hoisting machine for adjusting the floor height is provided on the counterweight that moves up and down as the upper and lower cars move up and down, so that the power for supplying power to the hoisting machine for adjusting the floor height is provided. A so-called traveling cable is required as a cable or a signal cable for control, but the double deck elevator 10 does not require such a traveling cable for adjusting the car interval.

  Further, since the auxiliary hoisting machine 32 for adjusting the car interval is installed in the machine room 26, its maintenance becomes easier as compared with the hoisting machine for adjusting the floor height of the third elevator.

<Embodiment 2>
As shown in FIG. 3, the double deck elevator 50 according to the second embodiment has a traction type secondary hoisting machine 52 instead of the hoisting type secondary hoisting machine 32, and is balanced with the upper car 16. The configuration is basically the same as that of the double deck elevator 10 (FIGS. 1 and 2A) of the first embodiment except that a sub-counter weight 54 for adjusting the car interval is provided. Accordingly, in FIG. 3, components that are substantially the same as those of the double deck elevator 10 (FIG. 1) are denoted by the same reference numerals, and the description thereof is only referred to as necessary. The explanation is centered.

  The auxiliary hoisting machine 52 installed in the machine room 26 includes an auxiliary motor 522 (FIG. 2A), an auxiliary sheave 524 provided on an output shaft (not shown) of the auxiliary motor 522, and a coaxial with the output shaft. A rotary encoder 526 and the like. As the rotary encoder 526, the same encoder as the rotary encoder 326 can be used.

  The sub-counter weight 54 for adjusting the car interval is suspended by the second rope 20. The sub counterweight 54 includes a main body 542 and a movable pulley 546 provided on the upper side of the main body 542.

  In the double deck elevator 50, the first end 20 </ b> A of the second rope 20 is fixed to the floor of the machine room 26 by a fixing device 56. The first end 20A is not limited to the floor of the machine room 26, and may be fixed to other parts of the building, for example, the ceiling of the hoistway 12 or the side wall of the hoistway 12.

  A sub counterweight 54 is suspended between the first end 20 </ b> A of the second rope 20 and a portion of the second rope 20 that is wound around the sub sheave 524. That is, the secondary counterweight 54 is suspended from the secondary rope 20 that hangs from the secondary sheave 524 to the opposite side of the upper cage 16. The secondary counterweight 54 is suspended by the second rope 20 with the second rope wound around the movable pulley 546.

  The weight (Wa) of the auxiliary counterweight 54 is set to a size obtained by adding the weight (Wc / 2) of half of the rated load (Wc) to the upper car 16 to the own weight (Wb) of the upper car 16 [Wa = Wb + (Wc / 2)].

  In the double deck elevator 50 configured as described above, the lower car 14 and the upper car 16 are raised and lowered by the main hoisting machine 28 in the same manner as the double deck elevator 10 of the first embodiment.

  Further, when the auxiliary sheave 524 of the auxiliary hoisting machine 52 is rotated in the direction of the arrow G, the upper car 16 is displaced in a direction relatively close to the lower car 14. On the other hand, when it is rotated in the direction of arrow H, it is adjusted by displacing it in a relatively spaced direction. When the upper car 16 is displaced in a direction relatively close to the lower car 14, the sub counterweight 54 is raised, and when the upper car 16 is displaced in a relatively separated direction, the sub counterweight 54 is lowered. .

  Here, when the upper car 16 can be brought close to the lower car 14 without limitation, there is a possibility that the upper car 16 and the lower car 14 may collide with each other in the first embodiment. It is the same.

  Therefore, in the second embodiment, the secondary counterweight 54 cannot be raised any more (in this example, the secondary counterweight 54 is in contact with the ceiling wall 24), that is, the second rope 20 is at the first end. In order to prevent the upper car 16 and the lower car 14 from colliding with each other even when the sub sheave 524 reaches the sub sheave 524 in the shortest path from the section 20A via the movable pulley 546, the upper car 16 can be The length of the second rope portion reaching the movable pulley 166 (the length on the first end side) is defined.

  A traction type secondary hoisting machine 52 is used as an auxiliary hoisting machine for adjusting the car interval, and a secondary counterweight 54 that is balanced with the upper car 16 is provided, whereby the hoisting drum type secondary hoisting machine 32 is used. Compared to the case where the upper car 16 is displaced, the torque required to displace the upper car 16 relative to the lower car 14 is smaller in the motor constituting the auxiliary hoisting machine. For this reason, in the second embodiment, the auxiliary hoisting machine can be made smaller than in the first embodiment.

  The car interval adjustment process performed by the sub control device 38 receiving the above-described car interval adjustment command from the main control device 40 and referring to the output signal (rotation angle information) from the rotary encoder 526 is the same as in the case of the first embodiment. Since it is basically the same, the description thereof is omitted.

<Embodiment 3>
In the second embodiment, the car interval D is adjusted with reference to the output signal (rotation angle information) from the rotary encoder 526 of the auxiliary hoisting machine 52 (the same applies to the first embodiment). On the other hand, in the third embodiment, referring to the detection result of the position detecting means for detecting the position in the vertical direction of the secondary counterweight 54 that moves up and down with the rotation of the secondary sheave 524, finally, The car interval D is adjusted.

  The double deck elevator 70 according to the third embodiment shown in FIGS. 2B and 4 is basically the same as the double deck elevator 50 (FIGS. 2A and 3) of the second embodiment except that position detecting means is added. The same configuration. Therefore, in FIGS. 2B and 4, the same reference numerals are given to the same components as those in FIGS. 2A and 3, and the description thereof is omitted or only referred to when necessary. The description will focus on the position detection means.

  As described in the second embodiment, when the auxiliary sheave 524 of the auxiliary hoisting machine 52 is rotated in the direction of arrow G, the upper car 16 is displaced in a direction relatively close to the lower car 14, and the auxiliary counter On the contrary, when the weight 54 is raised and rotated in the direction of the arrow H, the upper car 16 is displaced in a direction away from the lower car 14, and the sub-counter weight 54 is lowered. As a result, the car interval D is adjusted.

  In this case, the car interval D (D1, D2, D3, D4) and the vertical position of the sub counterweight 54 in the hoistway 12 correspond one-to-one. Therefore, in the third embodiment, position detecting means 72 for detecting the position of the sub counterweight 54 in the vertical direction is provided, and the car interval D is specified by adjusting the car interval D from the detection result of the position detecting means 72. I am doing so.

  The position detection means 72 is provided in a plurality of (four in this example) photosensors 74A, 74B, 74C, 74D and the sub counterweight 54 arranged in the vertical direction on the side wall 12A of the hoistway 12. And a light shielding piece 76.

  Since the photosensors 74A, 74B, 74C, and 74D all have the same configuration, the alphabetic suffixes (A to D) are omitted when it is not necessary to distinguish between them.

  As shown in FIG. 5A, the photo sensor 74 is a transmissive photo sensor in which a light emitting element 742 and a light receiving element 744 are provided to face each other.

  The light shielding piece 76 is fixed to the main body 542 of the sub counterweight 54 and moves up and down together with the sub counterweight 54. The fixing position of the light shielding piece 76 in the vertical direction with respect to the main body 542 is arbitrary.

  Each of the photosensors 74A, 74B, 74C, and 74D has an ascending / descending path of the light shielding piece 76 that is similarly raised and lowered as the sub counterweight 54 is raised and lowered, as shown in FIG. A light receiving element 744 is provided between the light receiving elements 744.

  The installation positions of the photosensors 74A, 74B, 74C, and 74D in the vertical direction correspond to the car intervals D1, D2, D3, and D4, respectively. That is, the photo sensor 74A is located at a position where the light shielding piece 76 is detected when the cage interval is D1, the photo sensor 74B is located where the light shielding piece 76 is detected when the cage interval is D2, and the cage interval is D3. A photo sensor 74C is installed at a position where the light shielding piece 76 is detected, and a photo sensor 74D is installed at a position where the light shielding piece 76 is detected when the car interval is D4 (in this case, D1> D2>). D3> D4). FIG. 4 shows a state where the car interval D is D2 and the light shielding piece 76 is detected by the photosensor 74B.

  In the double deck elevator 70 having the above configuration, the auxiliary hoisting machine 52 is driven and controlled, the auxiliary counterweight 54 is moved up and down, and the light shielding piece 76 is detected by any of the photosensors 74A, 74B, 74C, and 74D. By positioning the sub counterweight 54 at the position, the car interval D can be adjusted to any one of D1, D2, D3, and D4.

  In the double deck elevator 70, as shown in FIG. 2B, photo sensors 74A, 74B, 74C, and 74D are connected to the sub control device 38. The RAM 386 of the sub-control device 38 stores information that associates the car intervals D1, D2, D3, and D4 with the photosensors 74A, 74B, 74C, and 74D (hereinafter referred to as “sensor information”).

  When the sub-control device 38 receives the car interval adjustment command including the car interval information (any of D1 to D4) from the main control device 40, the sub-control device 38 changes the received car interval information from the sensor information stored in the RAM 386. Identify the corresponding photo sensor. Then, the sub-control device 38 rotates the sub-motor 522 of the sub-winding machine 52 until the light-shielding piece 76 is detected by the specified photosensor, and the sub-motor 522 is detected with the light-shielding piece 76 detected. Stop. As a result, the car interval D is adjusted to the floor height at the next two stop floors scheduled to stop. The car interval is adjusted at the same timing as in the first embodiment.

  In the double deck elevator 70, as described above, the car interval D can be adjusted by controlling the rotation of the auxiliary motor 522 of the auxiliary hoisting machine 52 based on the detection result of the position detecting means 72. For this reason, in order to adjust the car interval D, the rotary encoder 526 provided in the auxiliary hoisting machine 52 is not necessarily required.

  In the third embodiment described above, the position detecting means for detecting the vertical position of the sub counterweight 54 in the hoistway 12 is configured by the light shielding piece 76 and the plurality of photosensors 74A, 74B, 74C, 74D. Instead, the position detecting means may be configured as in the following modifications.

(Modification)
As shown in FIG. 5B, an absolute type magnetic linear scale 78 (hereinafter referred to as “magnetic scale 78”) may be used as the position detecting means.

  The magnetic scale 78 includes a magnetic tape 80 and a magnetic tape 80 that are recording tapes that record absolute position (distance) information between one end and the other end as a magnetic pattern (magnetic scale) with a resolution of 0.5 mm. And a reading unit 82 for reading the magnetic scale. As the magnetic scale 78, for example, a known one such as “Absolute Magnetic Scale LIMAX Series” manufactured by Ergo Electronic Co., Ltd. can be used.

  The magnetic tape 80 is attached to the side wall 12A so that the length direction is the vertical direction. In this example, it is stretched between a pair of brackets 84 and 86 that are fixed to the side wall 12A with an interval in the vertical direction.

  In this example, the magnetic tape 80 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 toward the upper side). The direction in which the magnetic tape 80 is attached to the side wall 12A (brackets 84 and 86) may be reversed.

  The reading unit 82 is fixed to the sub counterweight 54. Note that the fixed position of the reading unit 82 in the vertical direction with respect to the sub counterweight 54 is arbitrary.

  In the magnetic scale 78 provided as described above, the value of the magnetic scale read by the reading unit 82 indicates the vertical position of the sub counterweight 54 in the hoistway 12 at the time of reading.

  When the magnetic scale 78 is used as described above, the magnetic scale value read by the reading unit 82 when the car intervals are D1, D2, D3, and D4 in the RAM 386 of the sub-control device 38 (FIG. 2B). Are stored in association with the car interval information D1, D2, D3, D4. The magnetic scale values stored in association with the car interval information D1, D2, D3, and D4 may have an allowable width in consideration of the required car interval accuracy. For example, when the magnetic scale corresponding to the car interval D1 is 300 mm, the allowable width is 6 mm, and 300 ± 3 (297 mm to 303 mm) is stored in association with the car interval information D1. Hereinafter, the value of the magnetic scale stored in association with the car interval information is referred to as “scale information”.

  When receiving the car interval adjustment command including the car interval information (any one of D1 to D4) from the main controller 40 (FIG. 2B), the sub controller 38 (FIG. 2B) receives the car interval adjustment command. The scale information corresponding to the car interval information is read from the RAM 386. Then, the sub motor 522 (FIG. 2B) is rotated until the magnetic scale read by the reading unit 82 enters the range of the scale information read from the RAM 386. When the magnetic scale to be read enters the range, the sub motor 522 is rotated. Stop. As a result, the car interval is adjusted to the height of the two stop floors.

  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 is good also as the following forms.

(1) In the above embodiment, the upper car 16 is displaced relative to the lower car 20 to adjust the car interval D. On the contrary, the lower car 20 is moved relative to the upper car 16. The car interval D may be adjusted by relative displacement.
That is, the first end 18A side of the first rope 18 for suspending the lower car 14 is wound around the auxiliary sheaves 324 and 524 of the auxiliary hoisting machines 32 and 52, and the auxiliary sheaves 324 and 524 are rotated to rotate the lower cage 20 Is displaced relative to the upper car 16.

  (2) 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.

  (3) In the above embodiment, the traction type hoisting machine (main hoisting machine 28) is used as the hoisting machine for raising and lowering the upper car 16 and the lower car 20. However, the present invention is not limited to this. A hoisting machine may be used. In this case, as a matter of course, the main counterweight 22 is not necessary.

  (4) A movable pulley 144, 166 is provided below the lower car room 142 and the upper car room 162, respectively, and the lower car 14 and the upper car 16 are suspended by the first rope 18 and the second rope 20; However, the movable pulleys 144 and 166 may be provided above the lower car room 142 and the upper car room 162, respectively.

  (5) In the above embodiment, in the main counterweight 22 and the sub counterweight 54, the moving pulleys 224 and 546 are provided on the upper side of the main bodies 222 and 542, respectively. It may be provided below the main bodies 222 and 542.

  (6) In the second and third embodiments, the secondary counterweight 54 is provided with the moving pulley 546, and the secondary counterweight 54 is connected to the first end 20A of the second rope 20 and the secondary sheave 524 of the secondary hoisting machine 52. It was decided to suspend from the part which is wound. However, the present invention is not limited to this, and the first end 20A may be directly connected to the sub counterweight 54 and the sub counterweight 54 may be suspended. In this case, the weight of the sub counterweight is half of the above Wa (Wa / 2). Further, the upper car 16 is relatively close to or separated from the lower car 14 by a distance corresponding to half the amount of displacement of the sub counterweight in the vertical direction.

  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, 50, 70 Double deck elevator 14 Lower car 16 Upper car 18 First rope 20 Second rope 28 Main hoisting machine 32,52 Sub hoisting machine 284 Main sheave 324,524 Sub sheave

Claims (4)

In a hoistway provided in a building, a double deck elevator having two cars provided apart in the vertical direction,
A first cord that suspends a first of the two cars;
A second cord that suspends a second of the two cars;
A main hoisting machine for raising and lowering the car having a main sheave;
An auxiliary hoisting machine for adjusting a car interval having an auxiliary sheave;
With
The first end of the first cord is a fixed end, and the second end is wound around the main sheave. The first end and the main end of the first cord are The first car is suspended between the portion wound around the sheave and
The second end of the second cord is wound around the secondary sheave, and the second end of the second cord is wound around the main sheave. A double deck elevator characterized in that the second car is suspended between a portion wound around the main sheave and a portion wound around the main sheave.   The double deck elevator according to claim 1, wherein the auxiliary hoisting machine is a hoisting type hoisting machine.   The auxiliary hoisting machine is a traction type hoisting machine, and a counterweight for adjusting a car interval is hung on the second cord-like body portion hanging from the auxiliary sheave to the opposite side of the second car. The double deck elevator according to claim 1, wherein the double deck elevator is lowered.   4. The double deck elevator according to claim 3, further comprising position detecting means for detecting a position of the counterweight for adjusting the car interval that moves up and down with the rotation of the sub sheave in the up and down direction.

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