Elevator car door device

Abstract

The objective is to provide an elevator car door device that allows the car door locking mechanism to be unlocked more easily and reliably when the car door is forcibly moved in the open direction from the landing. [Solution] The door stop side blade 62 is provided with a blade projection 62a. The rotating cam 71 is also provided with a cam projection 71c. When the first car door 32 is manually moved in the opening direction from the landing via the first landing door 16, the rotating cam 71 rotates in the opposite direction, and the cam projection 71c strikes the blade projection 62a. As a result, the door stop side blade 62 is displaced toward the door stop side of the first car door 32, and the car door locking mechanism 35 is unlocked.

Description

Technical Field

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

Background Art

[0002] In a conventional elevator car door lock device, when the car is at the landing position, the car door moves toward the pocket side, so that the strike side blade hits the interlock roller and is displaced to the unlocking position. At the same time, the counterweight is displaced to the side opposite to the strike side blade (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 the conventional car door lock device as described above, a locking device for locking the car door in the closed position is provided between the car door frame and the car door. Therefore, when trying to forcibly move the car door in the opening direction from the landing, it is necessary to manually release the locked state by the locking device.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to obtain an elevator car door device that can unlock a car door locking mechanism more simply and reliably when forcibly moving the car door in the opening direction from the landing.

Means for Solving the Problems

[0006] The elevator car door device according to this disclosure comprises a car door provided on the car, a car-side coupling mechanism provided on the car door that connects the landing door to the car door by gripping a landing-side coupling member provided on the landing door when the car door is opened, an opening / closing interlocking mechanism that interlocks the car-side coupling mechanism with the operation of the car door, and a car door locking mechanism provided between the car and the car door that restricts the movement of the car door in the opening direction when the car is located away from the landing, the car-side coupling mechanism is displaceable relative to the car door in the opening / closing direction of the car door and has a landing door opening blade and a gripping blade that face each other in the opening / closing direction of the car door, and the opening / closing interlocking mechanism has a first follower provided on the gripping blade and a rotating cam rotatably provided on the car door. The landing door opening blade is provided with an unlocking part, and the rotating cam is provided with an unlocking part. During the normal opening operation of the car door, the rotating cam rotates in the forward direction in conjunction with the movement of the car door, and the first follower is guided by the rotating cam, causing the gripping blade to move toward the door stop side of the car door, so that the car-side coupling mechanism grips the landing-side coupling member. Also, the landing door opening blade is displaced toward the door stop side of the car door by being pushed by the landing-side coupling member, and the car door locking mechanism is unlocked. When the car door is manually moved in the opening direction from the landing through the landing door, the gripping blade is displaced toward the door pocket side of the car door by being pushed by the landing-side coupling member, and the rotating cam is pushed by the first follower and rotates in the reverse direction, the unlocking part contacts the unlocking part, the landing door opening blade is pushed toward the door stop side of the car door and displaced, and the car door locking mechanism is unlocked. [Effects of the Invention]

[0007] According to the elevator car door device of this disclosure, when the car door is forcibly moved in the opening direction from the landing, the car door locking mechanism can be unlocked more easily and reliably. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing the elevator according to Embodiment 1. [Figure 2] Figure 1 is a front view of the main part of the landing door device as seen from the hoistway side. [Figure 3] Figure 1 is a front view of the main part of the car door mechanism as seen from the landing side. [Figure 4] Figure 3 is a front view showing an enlarged view of the expandable connector. [Figure 5] Figure 4 is a front view showing the extended state of the expandable connector. [Figure 6] Figure 3 is a front view showing the state in which the first cage door has begun to move in the opening direction. [Figure 7] Figure 6 is a front view showing the first cage door in a state where it has moved further in the open direction. [Figure 8] Figure 7 is a front view showing the first cage door in a state where it has moved further in the open direction. [Figure 9] Figure 2 is a rear view of the interlock latch, fixed interlock roller, and movable interlock roller as seen from the landing side. [Figure 10] This is a front view showing the state when the elevator car is stopped at a position away from the landing, and an attempt is made to move the first elevator car door in the opening direction (Figure 6). [Figure 11] Figure 3 is a front view showing the movable interlock roller in the unlocked position, operated from the landing. [Figure 12] Figure 11 is a front view showing the rotating cam in a counterclockwise direction. [Figure 13] Figure 12 is a front view showing the first cage door in the open position. [Figure 14] This is a front view showing the first cage door in Figure 13 moved further in the open direction. [Figure 15] This is a front view showing the main parts of the elevator car door device according to Embodiment 2. [Figure 16] Figure 15 is a front view showing the state in which the first cage door has begun to move in the opening direction. [Figure 17] Figure 16 is a front view showing the first cage door in a state where it has moved further in the open direction. [Figure 18]It is a front view showing the state in which the first car door in FIG. 17 has further moved in the opening direction. [Figure 19] It is a front view showing the state in which, with the car stopped at a position away from the landing, an attempt is being made to move the first car door in FIG. 15 in the opening direction. [Figure 20] It is a front view showing the state in which the movable side interlock roller in FIG. 15 has been moved to the unlocking side by an operation from the landing. [Figure 21] It is a front view showing the state in which the rotary cam in FIG. 20 has rotated counterclockwise. [Figure 22] It is a front view showing the main part of the car door device of an elevator according to Embodiment 3. [Figure 23] It is a front view showing the state in which the first car door in FIG. 22 has started to move in the opening direction. [Figure 24] It is a front view showing the state in which the first car door in FIG. 23 has further moved in the opening direction. [Figure 25] It is a front view showing the state in which the first car door in FIG. 24 has further moved in the opening direction. [Figure 26] It is a front view showing the state in which, with the car stopped at a position away from the landing, an attempt is being made to move the first car door in FIG. 22 in the opening direction. [Figure 27] It is a front view showing the state in which the movable side interlock roller in FIG. 22 has been moved to the unlocking side by an operation from the landing. [Figure 28] It is a front view showing the state in which the rotary cam in FIG. 27 has rotated counterclockwise.

Mode for Carrying Out the Invention

[0009] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1. FIG. 1 is a schematic configuration diagram showing an elevator according to Embodiment 1. In the figure, a machine room 2 is provided above the hoistway 1. In the machine room 2, a hoisting machine 3, a compensator car 4, and an elevator control device 5 are installed.

[0010] The hoisting machine 3 includes a drive sheave 6, a hoisting machine motor (not shown), and a hoisting machine brake (not shown). The hoisting machine motor rotates the drive sheave 6. The hoisting machine brake maintains the drive sheave 6 in a stationary state. The hoisting machine brake also brakes the rotation of the drive sheave 6.

[0011] A suspension system 7 is wrapped around the drive sheave 6 and the deflector wheel 4. The suspension system 7 is made up of multiple ropes or multiple belts. A cage 8 is connected to the first end of the suspension system 7. A counterweight 9 is connected to the second end of the suspension system 7.

[0012] The elevator car 8 and counterweight 9 are suspended by the suspension body 7 and move up and down within the hoistway 1 by rotating the drive sheave 6. The elevator control device 5 controls the operation of the elevator car 8 by controlling the hoisting machine 3.

[0013] Within the elevator shaft 1, there is a pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown). The pair of car guide rails guide the movement of the car 8. The pair of counterweight guide rails guide the movement of the counterweight 9.

[0014] The elevator car 8 comprises a car frame 10, a car compartment 11, and a car door device 12. A suspension system 7 is connected to the car frame 10. The car compartment 11 is supported by the car frame 10. A door controller 13 is provided on the elevator car 8. The door controller 13 controls the car door device 12.

[0015] Each of the landings on multiple floors is equipped with a landing door device 14. Each landing door device 14 opens and closes in conjunction with the car door device 12 when the elevator car 8 lands on the floor.

[0016] Figure 2 is a front view of the main parts of the landing door device 14 shown in Figure 1, as seen from the elevator shaft 1 side. Each landing door device 14 includes a landing door girder 15, a first landing door 16, a second landing door 17, a landing door interlocking mechanism 18, an interlock device 19, and a door closer (not shown).

[0017] Each of the landings on multiple floors is provided with a landing entrance 14a. A landing door beam 15 is fixed to the top of the landing entrance 14a. A landing door rail 15a is provided on the landing door beam 15. The landing door rail 15a is arranged parallel to the width direction of the landing entrance 14a and horizontally. The width direction of the landing entrance 14a is parallel to the opening and closing direction of the first landing door 16 and the second landing door 17, and is the left-right direction in Figure 2.

[0018] The first landing door 16 and the second landing door 17 are suspended from the landing door rail 15a. Furthermore, when the landing entrance / exit 14a is opened and closed, the first landing door 16 and the second landing door 17 are guided by the landing door rail 15a and move in opposite directions.

[0019] Each of the first landing door 16 and the second landing door 17 has a landing door body 20 and a landing door hanger 21. Each landing door body 20 opens and closes the landing entrance 14a.

[0020] The landing door hanger 21 is fixed to the top of the landing door body 20. The landing door hanger 21 is also hung on the landing door rail 15a.

[0021] The landing door interlocking mechanism 18 includes a first landing pulley 22, a second landing pulley 23, an endless interlocking rope 24, a first landing door connecting fitting 25, and a second landing door connecting fitting 26.

[0022] The first landing pulley 22 and the second landing pulley 23 are installed on the landing door girder 15, spaced apart from each other in the width direction of the landing entrance 14a. The interlocking rope 24 is wound around the first landing pulley 22 and the second landing pulley 23.

[0023] The first landing door 16 is connected to the lower part of the interlocking rope 24 via the first landing door connecting fitting 25. The second landing door 17 is connected to the upper part of the interlocking rope 24 via the second landing door connecting fitting 26.

[0024] When the interlocking rope 24 circulates due to the opening and closing operation of the first landing door 16, the second landing door 17 moves in the opposite direction to the first landing door 16. In other words, the landing door interlocking mechanism 18 links the opening and closing operation of the first landing door 16 to the operation of the second landing door 17.

[0025] The interlock device 19 is installed between the landing door girder 15 and the first landing door 16. The interlock device 19 also prevents the landing entrance 14a from being opened from the landing side when the elevator car 8 is not in contact with the floor.

[0026] Furthermore, the interlock device 19 includes a latch 27, an interlock latch 28, a fixed-side interlock roller 29, and a movable-side interlock roller 30. The fixed-side interlock roller 29 and the movable-side interlock roller 30 are landing-side connecting members, respectively.

[0027] The latch 27 is fixed to the landing door girder 15. The interlock latch 28 is rotatably mounted on the landing door hanger 21 of the first landing door 16. When the first landing door 16 and the second landing door 17 are in the fully closed position, the tip of the interlock latch 28 catches on the latch 27, thereby restricting the movement of the first landing door 16 and the second landing door 17 in the opening direction.

[0028] The fixed interlock roller 29 is positioned coaxially with the rotation axis of the interlock latch 28. The movable interlock roller 30 is attached to the interlock latch 28. This allows the movable interlock roller 30 to move along an arc centered on the rotation axis of the interlock latch 28.

[0029] The door closer constantly applies a closing force, i.e., a self-closing force, to the first landing door 16 and the second landing door 17. The door closer generates the self-closing force of the first landing door 16 and the second landing door 17 by, for example, utilizing gravity acting on the closer weight.

[0030] Figure 3 is a front view of the main parts of the car door device 12 shown in Figure 1, as seen from the landing side. The car door device 12 includes a car door beam 31, a first car door 32, a second car door 33, a car door drive mechanism 34, a car door locking mechanism 35, a car-side coupling mechanism 36, and an opening / closing interlocking mechanism 37.

[0031] The elevator car 11 is provided with an entrance / exit 11a. The elevator car door beam 31 is attached to the elevator car 8 above the entrance / exit 11a. The elevator car door rail 31a is provided on the elevator car door beam 31. The elevator car door rail 31a is parallel to the width direction of the entrance / exit 11a and is horizontal. The width direction of the entrance / exit 11a is parallel to the opening and closing direction of the first elevator car door 32 and the second elevator car door 33, and is the left-right direction in Figure 3.

[0032] The first car door 32 and the second car door 33 are suspended from the car door rail 31a. When the car entrance 11a is opened and closed, the first car door 32 and the second car door 33 are guided by the car door rail 31a and move in opposite directions from each other.

[0033] Each of the first car door 32 and the second car door 33 has a car door body 38 and a car door hanger 39. Each car door body 38 opens and closes the car entrance 11a.

[0034] The cage door hanger 39 is fixed to the top of the cage door body 38. The cage door hanger 39 is also hung on the cage door rail 31a.

[0035] The car door drive mechanism 34 is installed on the car door beam 31. The car door drive mechanism 34 also includes a door motor 41, a first car pulley 42, a second car pulley 43, an endless drive belt 44, a first car door connecting fitting 45, and a second car door connecting fitting 46.

[0036] The door motor 41 is fixed to the car door beam 31. The first car pulley 42 and the second car pulley 43 are provided on the car door beam 31, spaced apart from each other in the width direction of the car entrance 11a. The first car pulley 42 rotates when the driving force from the door motor 41 is transmitted to it.

[0037] The drive belt 44 is wound around the first cage pulley 42 and the second cage pulley 43. The rotation of the first cage pulley 42 is transmitted to the second cage pulley 43 by the drive belt 44.

[0038] The first car door 32 is connected to the lower part of the drive belt 44 via the first car door connecting fitting 45. The second car door 33 is connected to the upper part of the drive belt 44 via the second car door connecting fitting 46.

[0039] When the first cage pulley 42 rotates, the drive belt 44 circulates, causing the first cage door 32 and the second cage door 33 to move in opposite directions.

[0040] The car door locking mechanism 35 is installed between the first car door 32 and the car door beam 31. The car door locking mechanism 35 also restricts the movement of the first car door 32 in the opening direction when the car 8 is located away from the landing. The car door locking mechanism 35 also includes a fixed locking element 51, a movable locking element 52, a connecting rod 53, a lock detection switch 54, and a short-circuiting member 55.

[0041] The fixed locking element 51 is fixed to the car door beam 31. The movable locking element 52 is attached to the first car door 32. The movable locking element 52 is also rotatable relative to the first car door 32 between the locked position shown in Figure 3 and the unlocked position shown in Figure 8. When the first car door 32 moves in the opening direction while the movable locking element 52 is in the locked position, the movable locking element 52 catches on the fixed locking element 51, restricting the opening movement of the first car door 32.

[0042] The upper end of the connecting rod 53 is rotatably connected to the movable lock 52. The lower end of the connecting rod 53 is connected to the car-side connecting mechanism 36.

[0043] The lock detection switch 54 is fixed to the car door beam 31 above the fixed locking element 51. The short-circuiting member 55 is fixed to the upper part of the movable locking element 52.

[0044] When the first car door 32 is in the fully closed position and the movable locking element 52 is in the locked position, the short-circuiting member 55 is inserted into the lock detection switch 54. As a result, the two contacts in the lock detection switch 54 are short-circuited via the short-circuiting member 55.

[0045] The short-circuiting member 55 is positioned above the rotation center of the movable locking element 52. When the movable locking element 52 rotates while the first car door 32 is in the fully closed position, the direction in which the short-circuiting member 55 is extended and retracted relative to the lock detection switch 54 is at an acute angle with respect to the opening and closing direction of the first car door 32.

[0046] The car-side coupling mechanism 36 is provided on the first car door 32. Furthermore, when the first car door 32 is opened, the car-side coupling mechanism 36 grips the fixed-side interlock roller 29 and the movable-side interlock roller 30, thereby connecting the first landing door 16 to the first car door 32.

[0047] When the elevator car 8 lands on the landing, the first car door 32 begins to open, and the movable interlock roller 30 and the fixed interlock roller 29 are clamped by the car-side coupling mechanism 36. As a result, the first car door 32 is connected to the first landing door 16, and the interlock device 19 is unlocked.

[0048] The car-side coupling mechanism 36 includes a support plate 61, a door stopper side blade 62 as a blade for opening the landing door, a first upper link 63, a first lower link 64, a door pocket side stopper 65, a door stopper side stopper 66, a door pocket side blade 67 as a gripping blade, a second upper link 68, and a second lower link 69.

[0049] The support plate 61 is fixed to the first car door 32. The door stop side blade 62 is attached to the support plate 61 via the first upper link 63 and the first lower link 64. The first upper link 63 and the first lower link 64 constitute a parallel link mechanism. As a result, the door stop side blade 62 can be displaced relative to the first car door 32 in the direction of opening and closing the first car door 32.

[0050] The door pocket side stopper 65 and the door stopper side stopper 66 are fixed to the support plate 61. The door pocket side stopper 65 restricts the displacement of the door stopper side blade 62 relative to the first car door 32 in the opening direction of the first car door 32. The door stopper side stopper 66 restricts the displacement of the door stopper side blade 62 relative to the first car door 32 in the closing direction of the first car door 32.

[0051] The door stopper blade 62 is displaceable relative to the first car door 32 within the range between the door pocket side stopper 65 and the door stopper side stopper 66. Furthermore, when the first car door 32 is in the fully closed position, the door stopper blade 62 is pressed against the door pocket side stopper 65 by gravity or the spring force of a blade spring (not shown).

[0052] The lower end of the door stopper blade 62 is rotatably connected to the first end of the first lower link 64. The lower end of the connecting rod 53 is rotatably connected to the second end of the first lower link 64. The second end of the first lower link 64 is the end opposite to the first end with respect to the rotation center of the first lower link 64.

[0053] When the door-stop side blade 62 is in contact with the door pocket side stopper 65, the movable locking element 52 is in the locked position. When the door-stop side blade 62 is displaced away from the door pocket side stopper 65, the first lower link 64 rotates clockwise in Figure 3, and the movable locking element 52 rotates toward the unlocked position.

[0054] The pocket-side blade 67 is provided on the pocket side of the first car door 32 relative to the door stop-side blade 62. The door stop-side blade 62 and the pocket-side blade 67 face each other in the opening and closing direction of the first car door 32. The pocket-side blade 67 is attached to the support plate 61 via the second upper link 68 and the second lower link 69.

[0055] The second upper link 68 and the second lower link 69 constitute a parallel link mechanism. This allows the pocket-side blade 67 to be displaced relative to the first car door 32 in the opening and closing direction of the first car door 32. As the pocket-side blade 67 is displaced toward the door stop side of the first car door 32, the pocket-side blade 67 grips the fixed-side interlock roller 29 and the movable-side interlock roller 30 by sandwiching them between itself and the door stop-side blade 62.

[0056] The opening / closing interlocking mechanism 37 interlocks the opening and closing operation of the first car door 32 with the car-side coupling mechanism 36. The opening / closing interlocking mechanism 37 also includes a first follower 70, a rotating cam 71, a fixed cam 72, a rotating member 73, a second follower 74, and an extendable coupling body 75.

[0057] The first follower 70 is attached to the pocket-side blade 67. The shape of the first follower 70 is roller-like.

[0058] The rotating cam 71 is rotatably mounted on the support plate 61. The rotating cam 71 is provided with a groove-shaped door-closing side guide portion 71a and a door-opening side guide portion 71b. The door-opening side guide portion 71b is connected to the door-closing side guide portion 71a.

[0059] As the door-closing side guide portion 71a moves away from the door-opening side guide portion 71b, that is, as it approaches the bottom of the groove, it moves closer to the rotation center of the rotating cam 71. Conversely, as the door-closing side guide portion 71a moves closer to the door-opening side guide portion 71b, it moves away from the rotation center of the rotating cam 71.

[0060] The door-opening guide portion 71b is an arc-shaped curved surface centered on the rotation center of the rotating cam 71. That is, the door-opening guide portion 71b is at a constant distance from the rotation center of the rotating cam 71.

[0061] As the rotating cam 71 rotates, the first follower 70 moves along either the door closing side guide portion 71a or the door opening side guide portion 71b. As a result, the pocket side blade 67 is displaced relative to the first car door 32 in the direction of opening and closing the first car door 32.

[0062] The fixed cam 72 is fixed to the car door beam 31. The fixed cam 72 is provided with a groove-shaped fixed-side guide portion 72a.

[0063] The rotating member 73 is rotatably mounted on the support plate 61 above the rotating cam 71.

[0064] The second follower 74 is attached to the rotating member 73. The shape of the second follower 74 is roller-shaped. When the first car door 32 is in the fully closed position, the second follower 74 is inserted into the fixed-side guide portion 72a and is in contact with the inner surface of the fixed-side guide portion 72a.

[0065] The upper end of the telescopic connector 75 is rotatably connected to the rotating member 73. The lower end of the telescopic connector 75 is rotatably connected to the rotating cam 71. In this way, the telescopic connector 75 connects the rotating cam 71 and the rotating member 73.

[0066] The door stopper-side blade 62 is provided with a blade projection 62a, which serves as the unlocking portion. The blade projection 62a protrudes toward the door pocket side of the first cage door 32.

[0067] A cam projection 71c, which serves as an unlocking part, is provided on the outside of the door-closing side guide portion 71a of the rotating cam 71. The cam projection 71c protrudes toward the door stop side of the first cage door 32.

[0068] During the normal opening operation of the first car door 32, the rotating cam 71 rotates in the forward direction in conjunction with the operation of the first car door 32, and the first follower 70 is guided by the rotating cam 71, causing the pocket-side blade 67 to move toward the door stop side of the first car door 32. Then, the car-side coupling mechanism 36 grips the movable-side interlock roller 30 and the fixed-side interlock roller 29, and the door stop-side blade 62 is pushed toward the door stop side of the first car door 32 by the movable-side interlock roller 30 and the fixed-side interlock roller 29, and the car door locking mechanism 35 is unlocked.

[0069] The positive direction of rotation for the rotating cam 71 is clockwise in Figure 3, which is the direction in which the cam projection 71c moves away from the blade projection 62a. Therefore, when the rotating cam 71 rotates in the positive direction, the cam projection 71c does not come into contact with the blade projection 62a.

[0070] When the first car door 32 is manually moved in the opening direction from the landing through the first landing door 16, the pocket-side blade 67 is pushed by the movable-side interlock roller 30 and the fixed-side interlock roller 29, displacing it toward the pocket side of the first car door 32, and the rotating cam 71 is pushed by the first follower 70, rotating in the opposite direction to the forward direction, causing the cam projection 71c to strike the blade projection 62a. As a result, the door stop-side blade 62 is pushed toward the door stop side of the first car door 32, displacing it and unlocking the car door locking mechanism 35.

[0071] Figure 4 is an enlarged front view showing the telescopic connector 75 of Figure 3. The telescopic connector 75 includes an upper rod 76, a lower rod 77, a guide member 78, and a return spring 79.

[0072] The guide member 78 has a flat spring seat 78a, a flat rod fixing portion 78b, and a flat connecting portion 78c. The spring seat 78a protrudes perpendicularly from the upper end of the connecting portion 78c. The rod fixing portion 78b protrudes perpendicularly from the lower end of the connecting portion 78c. The rod fixing portion 78b is also opposite the spring seat 78a.

[0073] The upper rod 76 comprises a rod body 76a, a rod stopper 76b, and a spring retainer 76c. The upper end of the rod body 76a is rotatably connected to the rotating member 73. The middle portion of the rod body 76a passes through the spring seat 78a. The rod stopper 76b is fixed to the middle portion of the rod body 76a on the opposite side of the spring seat 78a from the spring retainer 76c.

[0074] The spring retainer 76c is provided at the lower end of the rod body 76a. Furthermore, the spring retainer 76c is located between the spring seat 78a and the rod fixing portion 78b. Also, the spring retainer 76c faces the spring seat 78a.

[0075] The upper end of the lower rod 77 is fixed to the rod fixing part 78b. The lower end of the lower rod 77 is rotatably connected to the rotating cam 71.

[0076] The return spring 79 is provided between the spring seat 78a and the spring retainer 76c. In this example, a coil spring is used as the return spring 79. The upper rod 76 passes through the return spring 79.

[0077] With this configuration, the telescopic connector 75 can extend and retract between the normal state shown in Figure 4 and the extended state, which is a state extended from the normal state. Figure 5 is a front view showing the extended state of the telescopic connector 75 in Figure 4.

[0078] The telescopic connector 75 maintains its normal state during the normal opening and closing operation of the first car door 32. However, when the first car door 32 is manually moved in the opening direction from the landing via the first landing door 16, the telescopic connector 75 changes to an extended state when it receives a tensile force exceeding the set tensile force.

[0079] That is, when a tensile force opposing the return spring 79 is applied to the telescopic connector 75 from the normal state, as shown in Figure 5, the return spring 79 is compressed, the rod stopper 76b separates from the spring seat 78a, and the entire telescopic connector 75 is extended. At this time, the upper rod 76 is guided by the spring seat 78a and moves straight relative to the guide member 78 along the extension of the lower rod 77.

[0080] When the tensile force resisting the return spring 79 is released, the restoring force of the return spring 79 causes the upper rod 76 to move relative to the guide member 78 until the rod stopper 76b strikes the spring seat 78a. This returns the entire length of the telescopic connector 75 to its original length. In the normal state, the rod stopper 76b is pressed against the side of the spring seat 78a opposite to the return spring 79 by the spring force of the return spring 79.

[0081] The set tensile force is set to a value sufficiently larger than the force received during normal opening and closing operations of the first car door 32, so that it does not extend beyond its normal state during normal opening and closing operations. Furthermore, the set tensile force is set to a value sufficiently smaller than the upper limit of the force required to pry open the first car door 32 from the landing. The upper limit of the force required to pry open the first car door 32 from the landing is, for example, 300 N.

[0082] Next, the normal operation of the car door device 12 will be described. As shown in Figure 3, when the first car door 32 and the second car door 33 are in the fully closed position, the door stop side blade 62 and the door pocket side blade 67 are separated from the fixed side interlock roller 29 and the movable side interlock roller 30, respectively.

[0083] Furthermore, the door stopper blade 62 is in contact with the door pocket stopper 65. Also, the movable locking element 52 is in the locked position.

[0084] The first follower 70 is positioned slightly closer to the door-opening guide 71b than the dead end of the door-closing guide 71a. The dead end is the end of the door-closing guide 71a opposite to the door-opening guide 71b. In this state, the first follower 70 is relatively movable with respect to the rotating cam 71 in both directions: towards the dead end and away from the dead end.

[0085] When the rotating cam 71 rotates so that the first follower 70 moves from the position shown in Figure 3 towards the dead end, the cam projection 71c strikes the blade projection 62a, and the door stop side blade 62 is pushed and moved toward the door stop side of the first car door 32.

[0086] As the first cage door 32 begins to move in the opening direction from the state shown in Figure 3, the door stop side blade 62 first hits the movable side interlock roller 30, as shown in Figure 6. Also, the short-circuit member 55 is pulled out from the lock detection switch 54, and the lock detection switch 54 turns off.

[0087] Subsequently, as the first cage door 32 moves further in the opening direction, the movable interlock roller 30 is pushed by the door stop blade 62, as shown in Figure 7, and the interlock device 19 is unlocked. Also, the second follower 74 moves slightly along the fixed guide portion 72a of the fixed cam 72, and the rotating member 73 rotates clockwise in Figure 7.

[0088] The rotation of the rotating member 73 is transmitted to the rotating cam 71 via the telescopic connector 75. As a result, the rotating cam 71 rotates clockwise, i.e., in the positive direction, as shown in Figure 7. Consequently, the first follower 70 moves relative to the rotating cam 71 in a direction toward the door opening side guide 71b along the door closing side guide 71a.

[0089] At this time, as the first follower 70 gradually moves away from the rotation center of the rotating cam 71, the pocket-side blade 67 gradually moves in a direction that approaches the door stop-side blade 62.

[0090] Subsequently, as the first cage door 32 moves further in the opening direction, the pocket-side blade 67 strikes the fixed-side interlock roller 29 and the movable-side interlock roller 30, as shown in Figure 8. As a result, the fixed-side interlock roller 29 and the movable-side interlock roller 30 are sandwiched between the door stopper-side blade 62 and the pocket-side blade 67. The door stopper-side blade 62 also strikes the door stopper-side stopper 66.

[0091] The movement of the door stop blade 62 is transmitted to the movable locking element 52 via the first lower link 64 and the connecting rod 53. This causes the movable locking element 52 to rotate to the unlocked position. This allows further movement of the first car door 32 in the opening direction.

[0092] As the first landing door 16 and the first car door 32 begin to move in the opening direction simultaneously, the car-side coupling mechanism 36 firmly grips the fixed-side interlock roller 29 and the movable-side interlock roller 30. This enables smooth opening and closing operation.

[0093] Furthermore, the straight line passing through the center of the first follower 70 and the point of contact between the first follower 70 and the door-opening guide portion 71b also passes through the rotation center of the rotating cam 71. For this reason, the pocket door blade 67 does not move in the opening direction even when subjected to an opening force from the first car door 32. Also, even if the rotating cam 71 rotates further due to the further rotation of the rotating member 73, the position of the pocket door blade 67 does not change. In addition, the telescopic connecting body 75 is not subjected to tensile force.

[0094] Therefore, while the first car door 32 is moving, the car-side coupling mechanism 36 securely grips the fixed-side interlock roller 29 and the movable-side interlock roller 30.

[0095] Here, the position of the first car door 32 shown in Figure 8 is the locking start position when the first car door 32 is closed. The locking start position is the position of the first car door 32 where the car door locking mechanism 35 starts the locking operation during the normal closing operation of the first car door 32, that is, the position of the first car door 32 where the movable locking element 52 starts rotating from the unlocked position to the locked position.

[0096] Figure 9 is a rear view of the interlock latch 28, fixed-side interlock roller 29, and movable-side interlock roller 30 shown in Figure 2, as seen from the landing side. When the interlock device 19 is locked, the fixed-side interlock roller 29 and the movable-side interlock roller 30 are positioned within a width W1 in the opening and closing direction of the first car door 32.

[0097] Furthermore, when the first cage door 32 reaches the locking start position during normal closing operation, the distance between the door stop side blade 62 and the door pocket side blade 67 is less than or equal to the width W1.

[0098] With this configuration, even if the first landing door 16 fails to close automatically just before reaching the fully closed position due to wind pressure or other reasons, the door motor 41's driving force allows the pocket-side blade 67 to move the first landing door 16 in the closing direction. This allows the movable-side interlock roller 30 to move the door-stop-side blade 62 to a position corresponding to the unlocked position of the movable lock element 52.

[0099] In contrast, when the first car door 32 reaches the locking start position during normal closing operation, if the distance between the door stop side blade 62 and the door pocket side blade 67 is not less than or equal to the width W1, the first car door 32 may self-lock and become unable to open.

[0100] In other words, if the first car door 32 moves to the fully closed position, but the first landing door 16 stops just before the fully closed position due to wind pressure or the like, the door closing detection switch of the interlock device 19 does not turn on, and therefore the car 8 cannot move. As a result, the first car door 32 attempts to open again, but even if the first car door 32 moves to the locking start position, the door stop side blade 62 does not come into contact with the movable side interlock roller 30. As a result, the first car door 32 self-locks, and it becomes impossible to open it.

[0101] As a solution to this problem, in Embodiment 1, the door pocket side blade 67 is configured to close earlier during the normal opening operation of the first car door 32. Therefore, even if the first landing door 16 stops just before the fully closed position during the normal closing operation of the first car door 32, the door pocket side blade 67 pushes the fixed side interlock roller 29 and the movable side interlock roller 30 toward the door stop at the timing when the first car door 32 is in the locked position, causing the first landing door 16 to close and the door closing detection switch of the interlock device 19 to turn on.

[0102] Therefore, according to the configuration of Embodiment 1, when the car 8 is resting on the landing, the movable locking element 52 will never engage with the fixed locking element 51 and self-lock under any circumstances.

[0103] Next, we will explain the case where the elevator car 8 stops at a location away from the landing due to some malfunction. Figure 10 is a front view showing the state in which the elevator car 8 has stopped at a location away from the landing and an attempt is made to move the first elevator car door 32 in Figure 6 in the opening direction.

[0104] In this case, there is no fixed interlock roller 29 and a movable interlock roller 30 between the door stopper side blade 62 and the door pocket side blade 67. As a result, even when the first car door 32 begins to move in the opening direction, the door stopper side blade 62 remains in contact with the door pocket side stopper 65.

[0105] Therefore, the movable locking element 52 remains in the locked position and strikes the fixed locking element 51, preventing further movement of the first car door 32 in the opening direction.

[0106] Next, we will explain the case where the elevator car 8 is resting on the landing and the car entrance 11a is opened from the landing during elevator maintenance. Figure 11 is a front view showing the state in which the movable interlock roller 30 in Figure 3 has been moved to the unlocked side by operation from the landing.

[0107] After the maintenance worker unlocks the interlock device 19 by operating it from the landing, they move the first landing door 16 in the opening direction. As a result, the fixed interlock roller 29 and the movable interlock roller 30 move in the opening direction of the first car door 32 and strike the door pocket side blade 67.

[0108] When attempting to move the first landing door 16 further in the opening direction, an opening force is applied to the door pocket side blade 67 of the first car door 32. Then, a force that rotates the rotating cam 71 counterclockwise in Figure 11 is applied to the rotating cam 71 from the door pocket side blade 67 via the first follower 70. As a result, the rotating cam 71 rotates counterclockwise, or in the opposite direction, in Figure 11.

[0109] When the rotating cam 71 rotates in the reverse direction, as shown in Figure 12, the cam projection 71c strikes the blade projection 62a, and the door stop side blade 62 is pushed toward the door stop side of the first car door 32 and moves. As a result, the movable locking element 52 rotates to the unlocked position, the car door locking mechanism 35 is unlocked, and further movement of the first car door 32 in the opening direction is permitted.

[0110] When the first landing door 16 is moved further in the opening direction from the state shown in Figure 12, the door pocket side blade 67 is attached to the first car door 32, so as shown in Figure 13, the rotating member 73 rotates clockwise in Figure 12. As a result, a tensile force is applied to the telescopic connector 75, and the telescopic connector 75 extends.

[0111] When the telescopic connector 75 extends to its extended state, it becomes impossible to move the first landing door 16 in the opening direction. However, if the force applied to the first landing door 16 is released, the telescopic connector 75 will return to its normal state due to the force that causes it to contract, as shown in Figure 14, and the rotating cam 71 will rotate clockwise as shown in Figure 13.

[0112] As a result, the door pocket side blade 67 moves toward the door stop side. At this time, the first landing door 16 moves slightly toward the closing direction. However, since the first car door 32 has moved sufficiently toward the opening direction, the car door locking mechanism 35 does not lock, and the first car door 32 can be moved further toward the opening direction.

[0113] Furthermore, since the first follower 70 has moved until it contacts the door-opening guide portion 71b of the rotating cam 71, even if the door pocket side blade 67 receives a force in the opening direction, no force is generated to rotate the rotating cam 71 clockwise. For this reason, even if the first car door 32 is moved further in the opening direction, no reaction force is generated.

[0114] In this type of car door device 12, a blade projection 62a is provided on the door stop side blade 62. Additionally, a cam projection 71c is provided on the rotating cam 71. When the first car door 32 is manually moved in the opening direction from the landing through the first landing door 16, the rotating cam 71 rotates in the opposite direction, and the cam projection 71c strikes the blade projection 62a. As a result, the door stop side blade 62 is displaced toward the door stop side of the first car door 32, and the car door locking mechanism 35 is unlocked.

[0115] Therefore, in order to unlock the car door locking mechanism 35, it is not necessary to manually rotate the movable locking element 52 to the unlocked position through the gap between the first landing door 16 and the second landing door 17 that is created when the first landing door 16 is moved in the opening direction. Consequently, when the first car door 32 is forcibly moved in the opening direction from the landing, the car door locking mechanism 35 can be unlocked more easily and reliably.

[0116] Furthermore, during the normal opening operation of the first car door 32, the door stop side blade 62 is pushed by the fixed side interlock roller 29 and the movable side interlock roller 30, displacing it toward the door stop side of the first car door 32, thereby unlocking the car door locking mechanism 35.

[0117] Therefore, with a simple configuration, the car door device 12 can be given the function of locking the first car door 32.

[0118] Furthermore, an extendable connector 75 is provided in the opening / closing interlocking mechanism 37. The extendable connector 75 maintains its normal state during the normal opening and closing operation of the first car door 32. However, when the first car door 32 is manually moved in the opening direction from the landing via the first landing door 16, the extendable connector 75 changes to an extended state when it receives a tensile force exceeding the set tensile force.

[0119] Therefore, the force required to forcibly move the first car door 32 in the opening direction from the landing can be reduced.

[0120] Furthermore, when the first car door 32 is in the fully closed position, the second follower 74 is inserted into the fixed-side guide portion 72a. Therefore, if the movement of the pocket-side blade 67 is accelerated, the fixed-side interlock roller 29 and the movable-side interlock roller 30 can be gripped as soon as the first car door 32 begins to move in the opening direction, making the opening and closing operation smoother.

[0121] Furthermore, the telescopic connector 75 has the configuration shown in Figures 4 and 5. Therefore, a telescopic connector 75 that can expand and contract between a normal state and an extended state can be obtained with a simple configuration.

[0122] Furthermore, during normal opening and closing operations, the car-side coupling mechanism 36 can maintain a grip on the fixed-side interlock roller 29 and the movable-side interlock roller 30. As a result, the first car door 32 and the first landing door 16 open and close smoothly without unnecessary shaking or misalignment.

[0123] Furthermore, when the first cage door 32 reaches the locking start position during normal closing operation, the distance between the door stop side blade 62 and the door pocket side blade 67 is less than or equal to the width W1.

[0124] Therefore, regardless of the position of the first landing door 16, that is, even if the first landing door 16 is not in the fully closed position, the car door locking mechanism 35 can be unlocked more reliably.

[0125] Embodiment 2. Next, Figure 15 is a front view showing the main parts of the elevator car door device 12 according to Embodiment 2. The configuration of the opening and closing interlocking mechanism 37 of the car door device 12 in Embodiment 2 differs from that of Embodiment 1. The opening and closing interlocking mechanism 37 of Embodiment 2 includes a first follower 70, a rotating cam 71, a fixed cam 81, a rotating member 82, a second follower 83, a connecting body 84, a tension spring 85, and a rotating stopper 86.

[0126] The fixed cam 81 is fixed to the car door beam 31. The middle portion of the rotating member 82 is rotatably mounted to the support plate 61 above the rotating cam 71.

[0127] The second follower 83 is attached to the upper end of the rotating member 82. The shape of the second follower 83 is roller-like. When the first car door 32 is in the fully closed position, the second follower 83 rides up on the fixed cam 81.

[0128] The upper end of the connecting body 84 is rotatably connected to the lower end of the rotating member 82. The lower end of the connecting body 84 is rotatably connected to the rotating cam 71. In this way, the connecting body 84 connects the rotating cam 71 and the rotating member 82. Unlike the telescopic connecting body 75 of Embodiment 1, the connecting body 84 is a rod-shaped member that does not have a telescopic function.

[0129] One end of the tension spring 85 is connected to the support plate 61. The other end of the tension spring 85 is connected to the portion of the rotating member 82 between the center of rotation and the second follower 83.

[0130] The tension spring 85 applies a force to the rotating member 82 that rotates it clockwise as shown in Figure 15 when the first car door 32 is in the fully closed position. That is, when the first car door 32 is in the fully closed position, the second follower 83 is pressed against the fixed cam 81 by the tension spring 85.

[0131] The rotation stopper 86 is attached to the support plate 61. The rotation stopper 86 also restricts the rotation of the rotating member 82 in the clockwise direction shown in Figure 15.

[0132] When the first cage door 32 is in the fully closed position, the rotating member 82 is rotatable in a direction that moves the second follower 83 away from the fixed cam 81. That is, the shape of the fixed cam 81 is such that it allows the rotating member 82 to rotate in a direction that moves the second follower 83 away from the fixed cam 81.

[0133] Other configurations in Embodiment 2 are the same as those in Embodiment 1.

[0134] Next, the main normal operation of the cage door device 12 will be described. Starting from the state shown in Figure 15, when the first cage door 32 begins to move in the opening direction, the door stop side blade 62 first hits the movable side interlock roller 30, as shown in Figure 16. Also, the short-circuit member 55 is pulled out from the lock detection switch 54, and the lock detection switch 54 turns off.

[0135] Subsequently, as the first cage door 32 moves further in the opening direction, the movable interlock roller 30 is pushed by the door stop blade 62, as shown in Figure 17, and the interlock device 19 is unlocked. Also, the second follower 83 moves slightly along the fixed cam 81, and the rotating member 82 rotates clockwise in Figure 17.

[0136] The rotation of the rotating member 82 is transmitted to the rotating cam 71 via the connecting body 84. As a result, the rotating cam 71 rotates in the clockwise direction, or positive direction, as shown in Figure 17.

[0137] Subsequently, as the first cage door 32 moves further in the opening direction, the pocket-side blade 67 comes into contact with the fixed-side interlock roller 29 and the movable-side interlock roller 30, as shown in Figure 18. As a result, the fixed-side interlock roller 29 and the movable-side interlock roller 30 are sandwiched between the door-stop-side blade 62 and the pocket-side blade 67.

[0138] The movement of the door stop blade 62 is transmitted to the movable locking element 52 via the first lower link 64 and the connecting rod 53. This causes the movable locking element 52 to rotate to the unlocked position. This allows further movement of the first car door 32 in the opening direction.

[0139] Next, we will explain the case where the elevator car 8 stops at a location away from the landing due to some abnormality. Figure 19 is a front view showing the state in which the elevator car 8 has stopped at a location away from the landing and an attempt is made to move the first elevator car door 32 shown in Figure 15 in the opening direction.

[0140] In this case, similar to Embodiment 1, even when the first car door 32 begins to move in the opening direction, the door stopper blade 62 remains in contact with the door pocket stopper 65. As a result, the movable locking element 52 remains in the locked position and contacts the fixed locking element 51, preventing further movement of the first car door 32 in the opening direction.

[0141] Next, we will explain the case where the elevator car 8 is resting on the landing and the car entrance 11a is opened from the landing during elevator maintenance. Figure 20 is a front view showing the state in which the movable interlock roller 30 of Figure 15 has been moved to the unlocked side by operation from the landing.

[0142] When a maintenance worker unlocks the interlock device 19 and moves the first landing door 16 in the opening direction, the fixed interlock roller 29 and the movable interlock roller 30 move in the opening direction of the first car door 32 and strike the door pocket side blade 67.

[0143] When attempting to move the first landing door 16 further in the opening direction, an opening force is applied to the door pocket side blade 67 of the first car door 32. Then, a force that rotates the rotating cam 71 counterclockwise in Figure 20 is applied to the rotating cam 71 from the door pocket side blade 67 via the first follower 70.

[0144] As a result, a tensile force is applied to the connecting body 84, causing the rotating member 82 to rotate counterclockwise in Figure 20, and the second follower 83 to move away from the fixed cam 81. Simultaneously, the rotating cam 71 rotates counterclockwise, or in the opposite direction, in Figure 20.

[0145] When the rotating cam 71 rotates in the reverse direction, as shown in Figure 21, the cam projection 71c strikes the blade projection 62a, and the door stop side blade 62 is pushed toward the door stop side of the first car door 32 and moves. As a result, the movable locking element 52 rotates to the unlocked position, the car door locking mechanism 35 is unlocked, and further movement of the first car door 32 in the opening direction is permitted.

[0146] With this type of car door device 12, the car door locking mechanism 35 can be unlocked more easily and reliably when the first car door 32 is forcibly moved in the opening direction from the landing.

[0147] Furthermore, when the first cage door 32 is in the fully closed position, the rotating member 82 is rotatable in a direction that moves the second follower 83 away from the fixed cam 81. This simplifies the configuration.

[0148] Embodiment 3. Next, Figure 22 is a front view showing the main parts of the elevator car door device 12 according to Embodiment 3. The car door locking mechanism 35 of Embodiment 3 includes a fixed locking element 51, a movable locking element 52, a lock detection switch 54, a short-circuiting member 55, and a shaft member 91.

[0149] The movable locking element 52 is rotatably mounted on the support plate 61. That is, the movable locking element 52 is attached to the first car door 32 via the support plate 61. Furthermore, the movable locking element 52 is positioned on the opposite side of the support plate 61 from the door stop side blade 62.

[0150] The shaft member 91 is provided on the first upper link 63 above its center of rotation. The support plate 61 is provided with a relief hole (not shown). The movable locking element 52 is also provided with a connecting hole (not shown). The shaft member 91 is passed through the relief hole and inserted into the connecting hole below the center of rotation of the movable locking element 52. This configuration allows the operation of the first upper link 63 and the operation of the movable locking element 52 to be linked.

[0151] When the door stop side blade 62 moves toward the door stop side of the first car door 32, the first upper link 63 rotates clockwise in Figure 22, and the shaft member 91 moves to the right in Figure 22. As a result, the movable locking element 52 rotates counterclockwise in Figure 22, and the car door locking mechanism 35 is unlocked.

[0152] Furthermore, as described above, the door stopper blade 62 is constantly subjected to a force that returns it to the door pocket side due to gravity or the spring force of the blade spring.

[0153] Other configurations in Embodiment 3 are the same as those in Embodiment 1.

[0154] Next, the main normal operation of the cage door device 12 will be described. Starting from the state shown in Figure 22, when the first cage door 32 begins to move in the opening direction, the door stop side blade 62 first hits the movable side interlock roller 30, as shown in Figure 23. Also, the short-circuit member 55 is pulled out from the lock detection switch 54, and the lock detection switch 54 turns off.

[0155] Subsequently, as the first cage door 32 moves further in the opening direction, the movable interlock roller 30 is pushed by the door stop blade 62, as shown in Figure 24, and the interlock device 19 is unlocked. Also, the second follower 74 moves slightly along the fixed guide portion 72a, and the rotating member 73 rotates clockwise in Figure 24.

[0156] The rotation of the rotating member 73 is transmitted to the rotating cam 71 via the telescopic connector 75. As a result, the rotating cam 71 rotates in the clockwise direction, or positive direction, as shown in Figure 24.

[0157] Subsequently, as the first cage door 32 moves further in the opening direction, the pocket-side blade 67 comes into contact with the fixed-side interlock roller 29 and the movable-side interlock roller 30, as shown in Figure 25. As a result, the fixed-side interlock roller 29 and the movable-side interlock roller 30 are sandwiched between the door-stop-side blade 62 and the pocket-side blade 67.

[0158] The movement of the door stop blade 62 is transmitted to the movable locking element 52 via the first upper link 63 and the shaft member 91. This causes the movable locking element 52 to rotate to the unlocked position. This allows further movement of the first car door 32 in the opening direction.

[0159] Next, we will explain the case where the elevator car 8 stops at a location away from the landing due to some malfunction. Figure 26 is a front view showing the state in which the elevator car 8 has stopped at a location away from the landing and an attempt is made to move the first elevator car door 32 shown in Figure 22 in the opening direction.

[0160] In this case, similar to Embodiment 1, even when the first car door 32 begins to move in the opening direction, the door stopper blade 62 remains in contact with the door pocket stopper 65. As a result, the movable locking element 52 remains in the locked position and contacts the fixed locking element 51, preventing further movement of the first car door 32 in the opening direction.

[0161] Next, we will explain the case where the elevator car 8 is resting on the landing and the car entrance 11a is opened from the landing during elevator maintenance. Figure 27 is a front view showing the state in which the movable interlock roller 30 in Figure 22 has been moved to the unlocked side by operation from the landing.

[0162] When a maintenance worker unlocks the interlock device 19 and moves the first landing door 16 in the opening direction, the fixed interlock roller 29 and the movable interlock roller 30 move in the opening direction of the first car door 32 and strike the door pocket side blade 67.

[0163] When attempting to move the first landing door 16 further in the opening direction, an opening force is applied to the door pocket side blade 67 of the first car door 32. Then, a force that rotates the rotating cam 71 counterclockwise in Figure 27 is applied to the rotating cam 71 from the door pocket side blade 67 via the first follower 70. As a result, the rotating cam 71 rotates counterclockwise, or in the opposite direction, in Figure 27.

[0164] When the rotating cam 71 rotates in the reverse direction, as shown in Figure 28, the cam projection 71c strikes the blade projection 62a, and the door stop side blade 62 is pushed and moved toward the door stop side of the first car door 32. As a result, the movable locking element 52 rotates to the unlocked position, the car door locking mechanism 35 is unlocked, and further movement of the first car door 32 in the opening direction is permitted.

[0165] With this type of car door device 12, the car door locking mechanism 35 can be unlocked more easily and reliably when the first car door 32 is forcibly moved in the opening direction from the landing.

[0166] In embodiments 1 to 3, the car-side coupling mechanism 36 and the opening / closing interlocking mechanism 37 are attached to a common support plate 61. However, the car-side coupling mechanism 36 and the opening / closing interlocking mechanism 37 may be attached to separate support plates.

[0167] Furthermore, while embodiments 1 to 3 show a center-opening cage door device 12, the cage door device 12 may also be a single-opening type.

[0168] Furthermore, the number of cage doors and the number of landing doors may be one or three or more, respectively.

[0169] Furthermore, the configuration for unlocking and locking the movable locking element 52 by the operation of the door stop side blade 62 may also be a method other than that shown. As an example of a method other than those shown, a stop plate may be provided on the door stop side blade 62 and an unlocking part may be provided on the movable locking element 52, and when the door stop side blade 62 moves toward the door stop side, the stop plate may come into contact with the unlocking part.

[0170] Furthermore, while embodiments 1 to 3 show a reduced-connection type car door device in which a pair of landing-side connecting members are sandwiched between a landing door opening blade and a gripping blade, the car door device may also be an expanded-connection type. In the expanded-connection type, the gap between the landing door opening blade and the gripping blade is widened between a pair of landing-side connecting members fixed to the landing door, thereby gripping the pair of landing-side connecting members and connecting the landing door to the car door. In this case, the landing door opening blade is positioned on the door pocket side of the first car door 32, and the gripping blade is positioned on the door stop side of the first car door 32.

[0171] Furthermore, the overall layout of the elevator is not limited to the layout shown in Figure 1. For example, the roping method could be a 2:1 roping method.

[0172] Furthermore, the elevator may be a machine-room-less elevator, a double-deck elevator, or a single-shaft multi-car elevator. In a single-shaft multi-car elevator, 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]

[0173] 8 Car, 12 Car door device, 32 First car door, 29 Fixed side interlock roller (landing side connecting member), 30 Movable side interlock roller (landing side connecting member), 35 Car door locking mechanism, 36 Car side connecting mechanism, 37 Opening and closing interlocking mechanism, 62 Door stop side blade (blade for opening the landing door), 62a Blade projection (unlocked part), 67 Door pocket side blade (blade for gripping), 70 First follower, 71 Rotating cam, 71c Cam projection (unlocking part), 72, 81 Fixed cam, 72a Fixed side guide part, 73, 82 Rotating member, 74, 83 Second follower, 75 Telescopic connector, 84 Connector.

Claims

1. The cage door installed in the cage, A car-side connecting mechanism is provided on the car door, and when the car door is opened, it grips the landing-side connecting member provided on the landing door, thereby connecting the landing door to the car door. An opening and closing interlocking mechanism that links the car-side coupling mechanism to the operation of the car door, and A car door locking mechanism is provided between the car and the car door, and when the car is located away from the landing, it restricts the movement of the car door in the opening direction. Equipped with, The aforementioned car-side coupling mechanism is, It is displaceable relative to the car door in the opening and closing direction of the car door, and has a landing door opening blade and a gripping blade that face each other in the opening and closing direction of the car door. The aforementioned opening and closing interlocking mechanism is The first follower provided on the gripping blade, A rotating cam is rotatably mounted on the aforementioned cage door and It has, The aforementioned landing door opening blade is provided with an unlocking portion. The aforementioned rotating cam is provided with an unlocking mechanism. During the normal opening operation of the car door, the rotating cam rotates in the forward direction in conjunction with the movement of the car door, and the first follower is guided by the rotating cam, causing the gripping blade to move toward the door stop side of the car door, so that the car-side coupling mechanism grips the landing-side coupling member, and the landing-side coupling member pushes the landing-door-opening blade toward the door stop side of the car door, thereby unlocking the car door locking mechanism. An elevator car door device in which, when the car door is manually moved in the opening direction from the landing through the landing door, the gripping blade is pushed by the landing-side connecting member and displaced toward the door pocket side of the car door, the rotating cam is pushed by the first follower and rotated in the opposite direction, the unlocking part contacts the unlocked part, the landing door opening blade is pushed toward the door stop side of the car door and displaced, and the car door locking mechanism is unlocked.

2. The gripping blade is provided on the door pocket side of the car door relative to the landing door opening blade. The aforementioned landing door opening blade is a door stop side blade, The aforementioned gripping blade is the door pocket side blade, The elevator car door device according to claim 1, wherein when the car door is opened, the door stop side blade and the door pocket side blade grip the landing side connecting member by sandwiching the landing side connecting member.

3. The aforementioned opening and closing interlocking mechanism is A fixed cam provided in the aforementioned cage, A rotating member is rotatably provided on the aforementioned cage door, The second follower provided on the rotating member, A telescopic connecting body is connected between the rotating cam and the rotating member, and is expandable and contractible between a normal state and an extended state which is an extended state from the normal state. Furthermore, it has, During the normal opening operation of the cage door, the telescopic connecting body maintains the normal state, the second follower is guided by the fixed cam, causing the rotating member to rotate, and the rotation of the rotating member is transmitted to the rotating cam via the telescopic connecting body, causing the rotating cam to rotate in the forward direction. The elevator car door device according to claim 1 or claim 2, wherein when the car door is manually moved in the opening direction from the landing through the landing door, the telescopic connecting body changes to the extended state and the rotating cam rotates in the opposite direction when subjected to a tensile force greater than the set tensile force.

4. The aforementioned fixed cam is provided with a groove-shaped fixed-side guide portion. The elevator car door device according to claim 3, wherein when the car door is in the fully closed position, the second follower is inserted into the fixed side guide portion.

5. The aforementioned opening and closing interlocking mechanism is A fixed cam provided in the aforementioned cage, A rotating member is rotatably provided on the aforementioned cage door, A second follower is provided on the rotating member and is applied to the fixed cam when the cage door is in the fully closed position, A connecting body is connected between the rotating cam and the rotating member. Furthermore, it has, The elevator car door device according to claim 1 or claim 2, wherein when the car door is in the fully closed position, the rotating member is rotatable in a direction away from the fixed cam the second follower.

6. When the car-side connecting mechanism does not connect the landing door to the car door, the width of the landing-side connecting member in the opening and closing direction of the car door is width W1. During the normal closing operation of the car door, when the car door reaches the locking start position, the distance between the landing door opening blade and the gripping blade is less than or equal to the width W1. The elevator car door device according to claim 1 or claim 2, wherein the locking start position is the position of the car door where the car door locking mechanism starts the locking operation during the normal closing operation of the car door.

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