Elevator equipment

Abstract

Provided is an elevator device wherein a first interlock device is provided above a first landing entry / exit. A second interlock device is provided above a second landing entry / exit. The second interlock device is disposed in the opposite left-right orientation from the first interlock device. A first unlocking mechanism which unlocks the first interlock device during an opening operation for a pair of car doors is provided to one of the pair of car doors. A second unlocking mechanism which unlocks the second interlock device during an opening operation for the pair of car doors is provided to the other one of the pair of car doors.

Description

Technical Field

[0001] The present disclosure relates to an elevator device.

Background Art

[0002] In a conventional elevator device, the opening operation of a pair of landing doors is blocked by an interlock device. The interlock device has a latch, a catch, a fixed-side interlock roller, and a movable-side interlock roller. When the car lands on the landing floor and the pair of car doors starts to open, the fixed-side interlock roller and the movable-side interlock roller are sandwiched by a vane mechanism. As a result, the movable-side interlock roller moves along an arc centered on the fixed-side interlock roller, the catch disengages from the latch, and the interlock device is unlocked (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a building where an elevator device is installed, the floor height of one landing floor may be different from that of other landing floors, and accordingly, a difference may occur in the height dimension of the landing entrance. However, in a conventional elevator device, since the zone in which the unlocking of the interlock device is permitted by the vane mechanism is limited, the installation position of the interlock device is restricted.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to obtain an elevator device capable of improving the degree of freedom in the installation position of the interlock device.

Means for Solving the Problems

[0006] The elevator system relating to this disclosure includes a car entrance and exit, a car that moves up and down the hoistway, a pair of car doors provided on the car that open and close the car entrance by mechanically interlocking and moving in opposite directions, a pair of first landing doors that open and close the first landing entrance by mechanically interlocking and moving in opposite directions, a pair of second landing doors that open and close the second landing entrance located on a different landing floor from the first landing entrance by mechanically interlocking and moving in opposite directions, and above the first landing entrance, The elevator includes a first interlock device that prevents the opening of a pair of first landing doors, a second interlock device located above the second landing entrance and positioned opposite to the first interlock device, which prevents the opening of a pair of second landing doors, a first unlocking mechanism located on one of the pair of car doors which unlocks the first interlock device when the pair of car doors are opened, and a second unlocking mechanism located on the other of the pair of car doors which unlocks the second interlock device when the pair of car doors are opened. [Effects of the Invention]

[0007] The elevator system of this disclosure makes it possible to improve the degree of freedom in the installation location of the interlock device. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing an elevator system according to Embodiment 1. [Figure 2] Figure 1 is a front view of the first landing door device in the elevator system, as seen from the hoistway side. [Figure 3] Figure 1 is a front view of the second landing door device in the elevator system, as seen from the hoistway side. [Figure 4] Figure 1 is a front view of the elevator car door mechanism as seen from the landing side. [Figure 5]This is an explanatory diagram schematically showing the positional relationship between the first interlock device in Figure 2 and the first and second unlocking mechanisms in Figure 4. [Figure 6] This is a schematic explanatory diagram showing the positional relationship between the second interlock device in Figure 3 and the first and second unlocking mechanisms in Figure 4. [Figure 7] This is a front view of the elevator car door device in the elevator system according to Embodiment 2, as seen from the landing side. [Figure 8] This is a front view of the first landing door device in the elevator system according to Embodiment 2, as seen from the hoistway side. [Figure 9] This is a front view showing an enlarged view of the main parts of Figure 8. [Figure 10] This is an explanatory diagram schematically showing the positional relationship between the first unlocking mechanism and the second unlocking mechanism in Figure 7, and the first interlock device and auxiliary roller in Figure 8. [Figure 11] This is a schematic diagram illustrating the positional relationship between the first unlocking mechanism, the second unlocking mechanism, the second interlocking device, and the auxiliary roller when the first interlocking device is a car door unlocking interlocking device. [Figure 12] This is an explanatory diagram showing an example where a maintenance unlocking device is installed on the top floor. [Figure 13] This is a front view of the landing door device on the lowest floor of the elevator system according to Embodiment 3, as seen from the hoistway side. [Modes for carrying out the invention]

[0009] The embodiments will be described below with reference to the drawings. Embodiment 1. Figure 1 is a schematic diagram showing an elevator system according to Embodiment 1. In the figure, a support beam 2 is provided at the top of the hoistway 1. A hoisting machine 3 is supported on the support beam 2. The hoisting machine 3 has a hoisting machine body 4 and a drive sheave 5.

[0010] The hoist main body 4 has a hoist motor (not shown) and a hoist brake (not shown). The hoist motor rotates the drive sheave 5. The hoist brake holds the drive sheave 5 in a stationary state. Also, the hoist brake brakes the rotation of the drive sheave 5.

[0011] A suspension body (not shown) is wound around the drive sheave 5. As the suspension body, a plurality of ropes or a plurality of belts are used.

[0012] In the hoistway 1, a car 6 and a counterweight (not shown) are provided. The car 6 and the counterweight are suspended by the suspension body and move up and down in the hoistway 1 by rotating the drive sheave 5.

[0013] In the hoistway 1, a plurality of guide rails (not shown) are installed. The plurality of guide rails guide the up and down movement of the car 6 and the counterweight. The support beam 2 is supported by two or more of the plurality of guide rails.

[0014] On the front surface of the car 6, a car entrance 6a is provided. Also, the car 6 is provided with a car door device. The car door device has a pair of car doors, a right car door 7a and a left car door 7b. The right car door 7a is the car door located on the right side when looking at the car entrance 6a from the landing. The left car door 7b is the car door located on the left side when looking at the car entrance 6a from the landing.

[0015] The right car door 7a and the left car door 7b mechanically interlock with each other and move in opposite directions to open and close the car entrance 6a.

[0016] Between the plurality of landing floors and the hoistway 1, a plurality of landing entrances are provided. The plurality of landing entrances include at least one first landing entrance 10a and at least one second landing entrance 10b. The second landing entrance 10b is provided on a landing floor different from the first landing entrance 10a.

[0017] In this example, the landing entrances on multiple landing floors, excluding the lowest floor, are each designated as the first landing entrance 10a. The landing entrance on the lowest floor is designated as the second landing entrance 10b.

[0018] Furthermore, the height dimension h1 of each first landing entrance / exit 10a and the height dimension h2 of the second landing entrance / exit 10b are different from each other. In this example, the height dimension h2 of the second landing entrance / exit 10b is greater than the height dimension h1 of each first landing entrance / exit 10a. The height dimension of a landing entrance / exit is the vertical dimension from the landing floor to the top edge of the landing entrance / exit.

[0019] Each of the multiple landing levels where the first landing entrance 10a is located is equipped with a first landing door device. Each first landing door device has a pair of first landing doors: a first right landing door 8a and a first left landing door 8b. The first right landing door 8a is the landing door located to the right when viewed from the landing towards the first landing entrance 10a. The first left landing door 8b is the landing door located to the left when viewed from the landing towards the first landing entrance 10a.

[0020] In each first landing door device, the first right landing door 8a and the first left landing door 8b are mechanically linked to each other and move in opposite directions to open and close the corresponding first landing entrance / exit 10a. In addition, in each first landing door device, the first right landing door 8a and the first left landing door 8b open and close in conjunction with the right car door 7a and the left car door 7b when the car 6 lands.

[0021] A second landing door device is provided on the landing floor where the second landing entrance 10b is located. The second landing door device has a pair of second landing doors: a second right landing door 9a and a second left landing door 9b. The second right landing door 9a is the landing door located to the right when viewed from the landing towards the second landing entrance 10b. The second left landing door 9b is the landing door located to the left when viewed from the landing towards the second landing entrance 10b.

[0022] In the second landing door system, the second right landing door 9a and the second left landing door 9b are mechanically linked to each other and move in opposite directions to open and close the second landing entrance 10b. In addition, in the second landing door system, the second right landing door 9a and the second left landing door 9b open and close in conjunction with the right car door 7a and the left car door 7b when the car 6 lands.

[0023] Figure 2 is a front view of the first landing door system in the elevator system of Figure 1, as seen from the hoistway 1 side. In Figure 2, the first landing door system is viewed from the opposite side of the landing, so the first right landing door 8a is located on the left and the first left landing door 8b is located on the right.

[0024] A landing door frame 11 is fixed above the first landing entrance 10a. A landing door rail 12 is provided on the landing door frame 11. The landing door rail 12 is parallel to the width direction of the first landing entrance 10a and is horizontal. The width direction of the first landing entrance 10a is parallel to the opening and closing direction of the first right landing door 8a and the first left landing door 8b, which is the left-right direction in Figure 2.

[0025] A first pulley 13 is provided at the first end of the landing door frame 11 in the width direction of the first landing entrance 10a. A second pulley 14 is provided at the second end of the landing door frame 11 in the width direction of the first landing entrance 10a. An endless interlocking rope 15 is wound around the first pulley 13 and the second pulley 14.

[0026] Each of the first right-side landing door 8a and the first left-side landing door 8b has a landing door panel 16 and a landing door hanger 17. Each landing door hanger 17 is fixed to the top of the corresponding landing door panel 16.

[0027] Each landing door hanger 17 is equipped with multiple landing door rollers 18. Each landing door roller 18 moves by rolling along the landing door rail 12 when the first right landing door 8a and the first left landing door 8b are opened and closed. The first right landing door 8a and the first left landing door 8b are suspended from the landing door rail 12 and open and close along the landing door rail 12.

[0028] The first right-side landing door 8a is connected to the upper part of the interlocking rope 15 via the first landing door connecting fitting 19. The first left-side landing door 8b is connected to the lower part of the interlocking rope 15 via the second landing door connecting fitting 20.

[0029] A first interlock device 21a is provided between the first right-side landing door 8a and the landing door frame 11. That is, the first interlock device 21a is provided above the first landing entrance / exit 10a. The first interlock device 21a prevents the opening of the first right-side landing door 8a and the first left-side landing door 8b.

[0030] The first interlock device 21a includes a latch 22, a latch 23, a fixed-side interlock roller 24, and a movable-side interlock roller 25.

[0031] The latch 22 is fixed to the landing door frame 11. The latch 23 is rotatably mounted on the landing door hanger 17 of the first right landing door 8a. When the first right landing door 8a and the first left landing door 8b are in the fully closed position, the tip of the latch 23 catches on the latch 22, preventing the opening of the first right landing door 8a and the first left landing door 8b.

[0032] The fixed interlock roller 24 is positioned coaxially with the rotation axis of the latch 23. The movable interlock roller 25 is rotatably mounted on the latch 23. The latch 23 and the movable interlock roller 25 move along an arc centered on the rotation axis of the latch 23.

[0033] Figure 3 is a front view of the second landing door system in the elevator system of Figure 1, as seen from the hoistway 1 side. In Figure 3, the second landing door system is viewed from the opposite side of the landing, so the second right landing door 9a is located on the left and the second left landing door 9b is located on the right. The basic configuration of the second landing door system is the same as that of the first landing door system.

[0034] In the second landing door system, the second right landing door 9a and the second left landing door 9b each have a landing door panel 16 and a landing door hanger 17. However, the vertical dimension of each landing door panel 16 in the second landing door system is greater than the vertical dimension of each landing door panel 16 in the first landing door system.

[0035] Above the second landing entrance / exit 10b, similar to the first landing door device, a landing door frame 11, a landing door rail 12, a first pulley 13, a second pulley 14, and an interlocking rope 15 are provided.

[0036] The second right-side landing door 9a is connected to the upper part of the interlocking rope 15 via the first landing door connecting fitting 19. The second left-side landing door 9b is connected to the lower part of the interlocking rope 15 via the second landing door connecting fitting 20.

[0037] A second interlock device 21b is provided between the second left landing door 9b and the landing door frame 11. That is, the second interlock device 21b is provided above the second landing entrance / exit 10b. The second interlock device 21b prevents the opening of the second right landing door 9a and the second left landing door 9b.

[0038] The second interlock device 21b, like the first interlock device 21a, includes a latch 22, a latch 23, a fixed-side interlock roller 24, and a movable-side interlock roller 25.

[0039] However, the second interlock device 21b is positioned in the opposite direction to the first interlock device 21a when viewed from the elevator shaft 1 side. In this example, the second interlock device 21b is positioned symmetrically to the first interlock device 21a with respect to the widthwise center of the first landing entrance / exit 10a and the second landing entrance / exit 10b.

[0040] Figure 4 is a front view of the elevator car door system in Figure 1, as seen from the landing side. The car door frame 31 is fixed to the upper part of the car entrance 6a. The car door rail 32 is provided on the car door frame 31. The car door rail 32 is parallel to the width direction of the car entrance 6a and is horizontal. The width direction of the car entrance 6a is parallel to the opening and closing direction of the right car door 7a and the left car door 7b, and is the left-right direction in Figure 4.

[0041] Each of the right-side car door 7a and the left-side car door 7b has a car door panel 33 and a car door hanger 34. Each car door hanger 34 is fixed to the top of the corresponding car door panel 33. The right-side car door 7a and the left-side car door 7b are suspended from the car door rail 32 and open and close along the car door rail 32.

[0042] The car door frame 31 is equipped with a car door interlocking mechanism (not shown) and a door motor (not shown). The car door interlocking mechanism mechanically interlocks the right car door 7a and the left car door 7b with each other. The output of the door motor is transmitted to the right car door 7a and the left car door 7b via the car door interlocking mechanism. As a result, the right car door 7a and the left car door 7b open and close.

[0043] One of the pair of elevator car doors, the right-hand car door 7a, is equipped with a first unlocking mechanism 41. The first unlocking mechanism 41 unlocks the first interlock device 21a when the right-hand car door 7a and the left-hand car door 7b are opened at each of the multiple landing floors where the first landing entrance 10a is located.

[0044] The first unlocking mechanism 41 has a first door-side vane 42 and a first door pocket-side vane 43. The first door-side vane 42 and the first door pocket-side vane 43 are provided on the car door panel 33 of the right-side car door 7a.

[0045] The first door pocket side vane 43 is movable in the width direction of the car entrance 6a relative to the right car door 7a. As the first door pocket side vane 43 moves relative to the right car door 7a, the distance between the first door per side vane 42 and the first door pocket side vane 43 changes.

[0046] The cage door frame 31 and the right cage door 7a are provided with a first operating mechanism 44. The first operating mechanism 44 moves the first door pocket side vane 43 relative to the right cage door 7a when the right cage door 7a is opened or closed.

[0047] The first unlocking mechanism 41 inserts the fixed-side interlock roller 24 and the movable-side interlock roller 25 of the first landing door device between the first door vane 42 and the first door pocket vane 43. As a result, the first unlocking mechanism 41 rotates the latch 23, unlocking the first interlock device 21a and moving the first right-side landing door 8a together with the right-side car door 7a.

[0048] The left car door 7b, which is the other of the pair of car doors, is equipped with a second unlocking mechanism 45. The second unlocking mechanism 45 unlocks the second interlock device 21b when the right car door 7a and the left car door 7b are opened on the landing floor where the second landing entrance 10b is located.

[0049] The installation height of the second unlocking mechanism 45 relative to the car entrance 6a is different from the installation height of the first unlocking mechanism 41 relative to the car entrance 6a. Specifically, the installation position of the second unlocking mechanism 45 relative to the car entrance 6a is higher than the installation position of the first unlocking mechanism 41 relative to the car entrance 6a.

[0050] The second unlocking mechanism 45 has a second door-side vane 46 and a second door pocket-side vane 47. The second door-side vane 46 and the second door pocket-side vane 47 are provided on the car door panel 33 of the left car door 7b.

[0051] The second door pocket side vane 47 is movable in the width direction of the car entrance 6a relative to the left car door 7b. As the second door pocket side vane 47 moves relative to the left car door 7b, the distance between the second door side vane 46 and the second door pocket side vane 47 changes.

[0052] The cage door frame 31 and the left cage door 7b are provided with a second operating mechanism 48. The second operating mechanism 48 moves the second door pocket side vane 47 when the left cage door 7b is opened or closed.

[0053] The second unlocking mechanism 45 inserts the fixed interlock roller 24 and the movable interlock roller 25 of the second landing door device between the second door vane 46 and the second door pocket vane 47. As a result, the second unlocking mechanism 45 rotates the latch 23, unlocking the second interlock device 21b and moving the second left landing door 9b together with the left car door 7b.

[0054] Figure 5 is a schematic diagram illustrating the positional relationship between the first interlock device 21a in Figure 2 and the first unlocking mechanism 41 and the second unlocking mechanism 45 in Figure 4. When the elevator car 6 lands on a landing floor other than the lowest floor, the first unlocking mechanism 41 faces the first interlock device 21a.

[0055] Figure 6 is a schematic diagram illustrating the positional relationship between the second interlock device 21b in Figure 3 and the first unlocking mechanism 41 and the second unlocking mechanism 45 in Figure 4. When the elevator car 6 lands on the lowest floor, the second unlocking mechanism 45 faces the second interlock device 21b.

[0056] In this type of elevator system, the second interlock device 21b is positioned in the opposite direction to the first interlock device 21a. Furthermore, a first unlocking mechanism 41 for unlocking the first interlock device 21a is provided on the right car door 7a, which is one of the pair of car doors. And a second unlocking mechanism 45 for unlocking the second interlock device 21b is provided on the left car door 7b, which is the other of the pair of car doors.

[0057] Therefore, the installation positions of the first interlock device 21a and the second interlock device 21b can be changed depending on the landing floor, thereby increasing the degree of freedom in the installation positions of the first interlock device 21a and the second interlock device 21b.

[0058] Furthermore, the installation height of the second unlocking mechanism 45 relative to the elevator car entrance 6a is different from the installation height of the first unlocking mechanism 41 relative to the elevator car entrance 6a. Therefore, the restriction on the difference between the height dimension h1 of the first landing entrance 10a and the height dimension h2 of the second landing entrance 10b can be relaxed. In other words, the restriction on the difference in height dimensions between multiple different landing entrances can be relaxed.

[0059] Furthermore, the first interlock device 21a and the second interlock device 21b are located outside the landing door panel 16. Therefore, even if the landing door panel 16 is equipped with a glass window, the first interlock device 21a and the second interlock device 21b are not visible from the landing.

[0060] Embodiment 2. Next, Figure 7 is a front view of the elevator car door device in the elevator system according to Embodiment 2, as seen from the landing side. The car 6 is provided with a car door locking mechanism 51.

[0061] The car door locking mechanism 51 prevents the opening of the right car door 7a and the left car door 7b when the car 6 is located outside the door-opening area. The door-opening area is the area in which the opening of the right car door 7a and the left car door 7b is permitted when the car 6 lands on the ground during its up and down movement.

[0062] Furthermore, the cage door locking mechanism 51 allows the opening of the right cage door 7a and the left cage door 7b when the cage 6 is located within the door opening area.

[0063] The cage door locking mechanism 51 includes a fixed locking element 52 and an L-shaped rotating member 53. The fixed locking element 52 is fixed to the cage door panel 33 of the right-side cage door 7a. The fixed locking element 52 is provided with a groove 52a.

[0064] The middle portion of the rotating member 53 is rotatably connected to the door panel 33 of the left cage door 7b. The lower end of the rotating member 53 is rotatably connected to the second door vane 46. A locking pin 53a is provided at the upper end of the rotating member 53.

[0065] When the cage 6 is located outside the door opening area, there are no fixed interlock rollers 24 and movable interlock rollers 25 between the second door contact vane 46 and the second door pocket vane 47. In this state, if an attempt is made to open the right cage door 7a and the left cage door 7b, the rotating member 53 rotates clockwise in Figure 7, the lock pin 53a engages with the groove 52a, and the opening operation is prevented.

[0066] On the other hand, when the elevator car 6 is located within the door opening area on the lowest floor, the fixed interlock roller 24 and the movable interlock roller 25 of the second interlock device 21b are located between the second door-facing vane 46 and the second door pocket-facing vane 47. In this state, when the right elevator car door 7a and the left elevator car door 7b are opened, the rotation of the clockwise rotating member 53 in Figure 7 is restricted, the lock pin 53a does not enter the groove 52a, and the opening operation is permitted.

[0067] In Embodiment 2, the car door unlocking interlock device is the second interlock device 21b. The car door unlocking mechanism is the second unlocking mechanism 45. The car door unlocking mechanism is the unlocking mechanism among the first unlocking mechanism 41 and the second unlocking mechanism 45 that corresponds to the car door unlocking interlock device.

[0068] When the elevator car 6 reaches the lowest floor, the elevator car door locking mechanism 51 allows the right elevator car door 7a and the left elevator car door 7b to open when the second unlocking mechanism 45 strikes the second interlock device 21b.

[0069] Figure 8 is a front view of the first landing door device in the elevator system according to Embodiment 2, as seen from the hoistway side. Figure 9 is an enlarged front view showing the main parts of Figure 8.

[0070] An auxiliary guide body 61 is provided on the landing door frame 11. A movable body 62 is provided on the auxiliary guide body 61. The movable body 62 is guided by the auxiliary guide body 61 and can move in the width direction of the first landing entrance 10a.

[0071] The movable body 62 is provided with an auxiliary unlocking member 63. The auxiliary unlocking member 63 is positioned to correspond to the second unlocking mechanism 45. The auxiliary unlocking member 63, together with the movable body 62, is movable along the auxiliary guide body 61 in a direction parallel to the opening and closing directions of the right car door 7a and the left car door 7b. In this example, the auxiliary unlocking member 63 is a roller similar to the fixed-side interlock roller 24.

[0072] When the first right landing door 8a and the first left landing door 8b are in the fully closed position, the auxiliary unlocking member 63 is in the standby position shown in Figures 8 and 9. When the auxiliary unlocking member 63 is in the standby position, the vertical line C1 passing through the center of the auxiliary unlocking member 63 passes through the center of the fixed-side interlock roller 24 in the second landing door device.

[0073] Figure 10 is a schematic explanatory diagram showing the positional relationship between the first unlocking mechanism 41 and the second unlocking mechanism 45 in Figure 7 and the first interlock device 21a and the auxiliary unlocking member 63 in Figure 8. When the elevator car 6 lands on a landing floor other than the lowest floor, the elevator car door locking mechanism 51 allows the right elevator car door 7a and the left elevator car door 7b to open when the second unlocking mechanism 45 strikes the auxiliary unlocking member 63.

[0074] Other configurations in Embodiment 2 are the same as those in Embodiment 1.

[0075] In this type of elevator system, an auxiliary unlocking member 63 is provided on the landing floor where the first interlocking device 21a, which is not a car door unlocking interlocking device, is installed. The auxiliary unlocking member 63 is also positioned to correspond to the second unlocking mechanism 45. The car door locking mechanism 51 also allows the opening of the right car door 7a and the left car door 7b when the second unlocking mechanism 45 strikes the auxiliary unlocking member 63.

[0076] Therefore, even in elevator systems where the car 6 is equipped with a car door locking mechanism 51, the degree of freedom in the installation position of the first interlock device 21a and the second interlock device 21b can be improved.

[0077] In Embodiment 2, the second interlock device 21b is used as a car door unlocking interlock device, and the second unlocking mechanism 45 is used as a car door unlocking mechanism. However, the first interlock device 21a may be used as a car door unlocking interlock device, and the first unlocking mechanism 41 may be used as a car door unlocking mechanism.

[0078] In this case, the car door locking mechanism 51 is installed symmetrically with respect to the configuration in Figure 7, with respect to the center of the width direction of the car entrance 6a, and at a lower position than the position in Figure 7.

[0079] Figure 11 is a schematic explanatory diagram showing the positional relationship between the first unlocking mechanism 41 and the second unlocking mechanism 45, and the second interlocking device 21b and the auxiliary unlocking member 63 when the first interlocking device 21a is used as a car door unlocking interlocking device.

[0080] In Figure 11, the auxiliary unlocking member 63 is provided on the second right landing door 9a at each landing floor where a second interlock device 21b, which is not a car door unlocking interlock device, is installed. Furthermore, the auxiliary unlocking member 63 is provided on the second right landing door 9a at a position corresponding to the second unlocking mechanism 45.

[0081] Furthermore, in the configuration shown in Figure 11, as shown in Figure 12, a maintenance unlocking member 65 and a maintenance guide body 66 may be provided above the first landing entrance 10a on the top floor within the elevator shaft 1. The maintenance unlocking member 65 is guided by the maintenance guide body 66 and is movable in a direction parallel to the opening and closing operation directions of the right car door 7a and the left car door 7b. In this example, the maintenance unlocking member 65 is a roller similar to the auxiliary unlocking member 63.

[0082] In this case, the first unlocking mechanism 41 may be extended upward, making its vertical dimension larger than that of the second unlocking mechanism 45.

[0083] When moving the elevator car 6 above the door opening area on the top floor and performing maintenance work on the elevator car 6, the worker moves the maintenance unlocking member 65 to a position directly above the first unlocking mechanism 41 before moving the elevator car 6 above the door opening area. After this, by moving the elevator car 6 above the top floor, the maintenance unlocking member 65 faces the first unlocking mechanism 41.

[0084] If, during maintenance work on elevator car 6, elevator car 6 becomes immobile for any reason, the worker will move into elevator car 6 through the ceiling escape hatch and manually move the right-side elevator car door 7a and the left-side elevator car door 7b in the opening direction.

[0085] At this time, the first unlocking mechanism 41 strikes the maintenance unlocking member 65, and the opening of the right car door 7a and the left car door 7b is permitted. In other words, the car door locking mechanism 51 also permits the opening of the right car door 7a and the left car door 7b when the first unlocking mechanism 41 strikes the maintenance unlocking member 65.

[0086] After moving the right car door 7a and the left car door 7b to a certain extent in the opening direction, the worker prevents the right car door 7a and the left car door 7b from moving in the closing direction using a door fixing jig (not shown). After this, the worker manually unlocks the first interlock device 21a and manually moves the first right landing door 8a and the first left landing door 8b in the opening direction, allowing them to escape to the landing.

[0087] As a result, even in elevator systems equipped with a car door locking mechanism 51, maintenance work can be performed with the car 6 closer to the hoistway equipment, improving the workability of maintenance work on the car 6. After the maintenance work is completed, the maintenance unlocking member 65 is moved to a position away from the position directly above the first unlocking mechanism 41.

[0088] Note that the auxiliary unlocking member 63 and the maintenance unlocking member 65 are not limited to rollers.

[0089] Furthermore, the configuration of the cage door locking mechanism 51 is not limited to the above configuration.

[0090] Embodiment 3. Next, an elevator system according to Embodiment 3 will be described. In Embodiment 3, since the height dimensions of the landing entrances are the same or the difference in height dimensions of the landing entrances is small at all landing floors, the installation height of the first unlocking mechanism 41 relative to the car entrance 6a and the installation height of the second unlocking mechanism 45 relative to the car entrance 6a are the same.

[0091] Figure 13 is a front view of the landing door device on the lowest floor of the elevator system according to Embodiment 3, as seen from the hoistway 1 side.

[0092] The second interlock device 21b, located on the lowest floor, is equipped with a pit unlocking mechanism 26. The pit unlocking mechanism 26 has, for example, a flexible operating member. As the operating member, for example, a wire or rope is used. The operating member is connected to the latch 23.

[0093] A pit ladder (not shown) is installed in the pit of elevator shaft 1. The pit ladder is used by workers to move between the lowest floor landing and the pit. The second interlock device 21b is manually unlocked by a worker operating an operating member from the pit or the pit ladder.

[0094] Typically, the pit unlocking mechanism 26 is installed on the landing door on the side where the latch 23 is located. The pit ladder is installed below the landing door where the pit unlocking mechanism 26 is located.

[0095] However, if latches 23 are to be installed on the same side of the landing doors on all landing floors, due to the layout of the elevator system, it may not be possible to install a pit ladder below the landing door on the side where the latch 23 is installed. In that case, the pit ladder and the pit unlocking mechanism 26 will be separated to the left and right, making it difficult to operate the pit unlocking mechanism 26 from the pit ladder.

[0096] In contrast, in Embodiment 3, the elevator car 6 is provided with a first unlocking mechanism 41 and a second unlocking mechanism 45, and the second interlock device 21b is located on the opposite side from each of the first interlock devices 21a on the other landing floors.

[0097] Therefore, the degree of freedom in the installation positions of the first interlock device 21a and the second interlock device 21b can be improved. As a result, regardless of the layout of the elevator system, the latch 23 and the pit unlocking mechanism 26 can be positioned on the same side with respect to the widthwise center of the second landing entrance 10b. Consequently, operation of the pit unlocking mechanism 26 from the pit ladder can be made easier.

[0098] In Embodiment 3, the height dimensions of multiple different landing entrances may be different.

[0099] Furthermore, in embodiments 1 to 3, the number of landing entrances with a large height dimension is not particularly limited and may be two or more.

[0100] Furthermore, in embodiments 1 to 3, the number of landing entrances with small height dimensions is not particularly limited. For example, the height dimension of the landing entrance on the lowest floor may be smaller than the height dimension of the landing entrances on floors other than the lowest floor.

[0101] Furthermore, in embodiments 1 to 3, if the first interlock device 21a or the second interlock device 21b can be unlocked by the first unlocking mechanism 41 or the second unlocking mechanism 45, the number of patterns for the height dimension of the landing entrance may be three or more.

[0102] Furthermore, in embodiments 1 to 3, the structure and size of the first interlock device and the structure and size of the second interlock device do not have to be the same.

[0103] Furthermore, in embodiments 1 to 3, the car door device and the landing door device may be single-leaf door devices.

[0104] Furthermore, in embodiments 1 to 3, the number of door panels in the car door device and the landing door device may be one or three or more.

[0105] Furthermore, the layout of the elevator system is not limited to the layout shown in Figure 1. For example, the hoisting machine 3 may be installed at a location other than the top of the hoistway 1.

[0106] Furthermore, the elevator system may include an elevator system with a machine room, a double-deck elevator, a single-shaft multi-car elevator, etc. In the single-shaft multi-car system, the upper car and the lower car located directly below the upper car each move independently up and down a common hoistway. [Explanation of Symbols]

[0107] 1 elevator shaft, 6 elevator car, 6a elevator car entrance / exit, 7a right elevator car door, 7b left elevator car door, 8a first right landing door, 8b first left landing door, 9a second right landing door, 9b second left landing door, 10a first landing entrance / exit, 10b second landing entrance / exit, 21a first interlock device, 21b second interlock device, 41 first unlocking mechanism, 45 second unlocking mechanism, 51 elevator car door locking mechanism, 63 auxiliary unlocking member, 65 maintenance unlocking member.

Claims

1. An entrance / exit for the elevator car is provided, and the elevator car ascends and descends the hoistway. A pair of cage doors are provided in the cage and operate in opposite directions in a mechanically linked manner to open and close the cage entrance. A pair of first landing doors that open and close the first landing entrance by mechanically moving in opposite directions. A pair of second landing doors that mechanically interlock and operate in opposite directions to open and close a second landing entrance located on a different landing floor from the first landing entrance, A first interlock device is provided above the first landing entrance and prevents the opening of the pair of first landing doors. A second interlock device is provided above the second landing entrance and is positioned in the opposite direction to the first interlock device, and prevents the opening of the pair of second landing doors. A first unlocking mechanism is provided on one of the pair of cage doors, and unlocks the first interlock device when the pair of cage doors are opened. A second unlocking mechanism is provided on the other of the pair of cage doors, which unlocks the second interlock device when the pair of cage doors are opened, and A cage door locking mechanism provided in the cage, which prevents the pair of cage doors from opening when the cage is located outside the door opening area, and allows the pair of cage doors to open when the cage is located within the door opening area. Equipped with, The installation height of the second unlocking mechanism relative to the car entrance is different from the installation height of the first unlocking mechanism relative to the car entrance. The car door locking mechanism allows the pair of car doors to open when a car door unlocking mechanism, which is one of the first and second interlocking devices, strikes a car door unlocking interlocking device, which is one of the first and second unlocking mechanisms, which is the unlocking mechanism corresponding to the car door unlocking interlocking device. An auxiliary unlocking member is provided at a position corresponding to the car door unlocking mechanism on the landing floor where the other of the first interlock device and the second interlock device is installed, and which is movable in a direction parallel to the opening and closing direction of the pair of car doors. The car door locking mechanism is an elevator device that allows the opening of the pair of car doors even when the car door unlocking mechanism strikes the auxiliary unlocking member.

2. Within the elevator shaft, a maintenance unlocking member is provided that faces the elevator car door unlocking mechanism by moving the elevator car above the top floor. The maintenance unlocking member is movable in a direction parallel to the opening and closing direction of the pair of cage doors. The elevator device according to claim 1, wherein the car door locking mechanism allows the pair of car doors to open even when the car door unlocking mechanism strikes the maintenance unlocking member.

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