Elevator car door device

Abstract

The purpose of the present disclosure is to obtain an elevator car door device that can easily have a function of restricting a closing operation of a car door caused by a self-closing force of a landing door. The restricting device (50) has a restricting device main body (51). The restricting device body (51) is attached to the car door cross member (31). The closing operation of the first car door (32) and the second car door (33) caused by the self-closing force of the first landing door (16) and the second landing door (17) is restricted by the connection mechanism roller (69) abutting against the movable part located at the restriction position.

Description

Technical Field

[0001] The present disclosure relates to a car door device of an elevator. Background Art

[0002] In a conventional elevator door device, a portion made of a ferromagnetic material is provided on a hanger roller. A part of the door rail is made of a magnet. The magnet is arranged at a position corresponding to the ferromagnetic material when the door is at least in the closed position among the open position and the closed position (for example, refer to Patent Document 1).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent No. 6827653 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] In the conventional elevator door device as described above, it is necessary to use a special hanger roller including a portion made of a ferromagnetic material, and when applied to an existing door device, it is necessary to replace the hanger roller. In addition, it is necessary to arrange a magnet at a position corresponding to the ferromagnetic material when the door is at least in the closed position among the open position and the closed position, and it takes time to adjust the position.

[0008] The present disclosure has been made to solve the above problems, and an object thereof is to obtain a car door device of an elevator that can easily have a function of restricting the closing operation of the car door caused by the self-closing force of the landing door.

[0009] Means for Solving the Problems

[0010] The car door device of the elevator of the present disclosure includes: a car door crossbeam provided on the car; a door motor provided on the car; a car door provided on the car and opened and closed by the door motor; a car-side connection mechanism that connects the car door and the landing door and makes the opening and closing operations of the landing door and the car door interlock; and a restricting device that allows the opening and closing operation of the car door caused by the door motor and restricts the closing operation of the car door caused by the self-closing force of the landing door. The car-side connection mechanism has a connection mechanism roller provided on the car door and moving together with the car door. The restricting device has a restricting device main body provided on the car door crossbeam. The restricting device main body has: a movable part that can be displaced between a restricting position and an allowing position; and a return spring part that returns the movable part from the allowing position to the restricting position. By the connection mechanism roller abutting against the movable part located at the restricting position, the closing operation of the car door caused by the self-closing force of the landing door is restricted. When the car door is opened and closed by the door motor, the movable part is pressed by the connection mechanism roller, whereby the return spring part is elastically deformed and the movable part is displaced to the allowing position.

[0011] Advantages of the Invention

[0012] The car door device of the elevator according to the present disclosure can easily have a function of restricting the closing action of the car door caused by the self-closing force of the landing door. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an elevator showing Embodiment 1.

[0014] Figure 2 It is viewed from the hoistway side Figure 1 A front view of the main part of the landing door device.

[0015] Figure 3 It is viewed from the landing side Figure 1 A front view of a part of the car door device.

[0016] Figure 4 It shows Figure 3 An explanatory diagram showing the relationship between the restriction device main body and the connecting mechanism roller.

[0017] Figure 5 It is an enlarged front view showing Figure 3 The car-side connecting mechanism.

[0018] Figure 6 It is a front view of the car-side connecting mechanism after the first car door and the second car door have just started to open.

[0019] Figure 7 It is a front view of the car-side connecting mechanism and the restriction device main body before the first car door and the second car door reach the fully open position.

[0020] Figure 8 It is a front view of the car-side connecting mechanism and the restriction device main body when the first car door and the second car door reach the fully open position.

[0021] Figure 9 It is a front view of a part of the car door device of Embodiment 2 viewed from the landing side.

[0022] Figure 10 It shows Figure 9 The restriction device main body.

[0023] Figure 11 It shows Figure 10 A front view of the state where the movable part is shifted to the allowable position.

[0024] Reference Numeral Explanation

[0025] 8: car; 12: car door device; 16: first floor station door; 17: second floor station door; 31: car door crossbeam; 32: first car door; 33: second car door; 44: door motor; 50, 80: limiting device; 51, 81: limiting device body; 51a: movable part; 51b: return spring part; 60: car side connecting mechanism; 62: door stop side door knife; 63: door frame side door knife; 64: door knife driving mechanism; 67: connecting component; 67a: connecting component shaft; 69: connecting mechanism roller; 83: pressing spring (return spring part); 84: movable component (movable part). DETAILED DESCRIPTION

[0026] Hereinafter, embodiments will be described with reference to the drawings.

[0027] Implementation method 1.

[0028] Figure 1 1 is a schematic diagram showing the structure of an elevator according to Embodiment 1. In the figure, a machine room 2 is provided on a hoistway 1. In the machine room 2, a traction machine 3, a deflection sheave 4, and an elevator control device 5 are provided.

[0029] The hoisting machine 3 includes a driving sheave 6, a hoisting machine motor (not shown), and a hoisting machine brake (not shown). The hoisting machine motor rotates the driving sheave 6. The hoisting machine brake keeps the driving sheave 6 stationary. In addition, the hoisting machine brake brakes the rotation of the driving sheave 6.

[0030] A suspension body 7 is wound around the driving sheave 6 and the deflector pulley 4. A plurality of ropes or a plurality of belts are used as the suspension body 7. A car 8 is connected to a first end of the suspension body 7. A counterweight 9 is connected to a second end of the suspension body 7.

[0031] The car 8 and the counterweight 9 are suspended by the suspension body 7, and are moved up and down in the hoistway 1 by rotating the driving sheave 6. The elevator control device 5 controls the operation of the car 8 by controlling the traction machine 3.

[0032] A pair of car guide rails (not shown) and a pair of counterweight guide rails (not shown) are provided in the hoistway 1. The pair of car guide rails guide the raising and lowering of the car 8. The pair of counterweight guide rails guide the raising and lowering of the counterweight 9.

[0033] The car 8 includes a car frame 10, a car room 11, and a car door device 12. The suspension body 7 is connected to the car frame 10. The car room 11 is supported by the car frame 10. The car 8 is provided with a door controller 13. The door controller 13 controls the car door device 12.

[0034] Each of the landings of the plurality of floors is provided with a landing door device 14. Each landing door device 14 is opened and closed in conjunction with the car door device 12 when the car 8 stops.

[0035] Figure 2 Viewed from the hoistway 1 side Figure 1 is a front view of the main part of the landing door device 14. Each landing door device 14 has a landing door crossbeam 15, a first landing door 16, a second landing door 17, a landing door linkage mechanism 18, an interlock device 19, and a door closer (not shown).

[0036] Landing door entrances 14a are respectively provided at the landings of multiple floors. The landing door crossbeam 15 is fixed to the upper part of the landing door entrance 14a. Landing door tracks 15a are provided on the landing door crossbeam 15. The landing door tracks 15a are arranged parallel to the width direction of the landing door entrance 14a and horizontally. The width direction of the landing door entrance 14a is the direction parallel to the opening and closing movement direction of the first landing door 16 and the second landing door 17, and is Figure 2 the left - right direction.

[0037] The first landing door 16 and the second landing door 17 are suspended from the landing door tracks 15a. In addition, when the landing door entrance 14a opens and closes, the first landing door 16 and the second landing door 17 are guided by the landing door tracks 15a and move in opposite directions to each other.

[0038] The first landing door 16 and the second landing door 17 respectively have a landing door body 20 and a landing door hanger 21. Each landing door body 20 opens and closes the landing door entrance 14a.

[0039] The landing door hanger 21 is fixed to the upper part of the landing door body 20. In addition, the landing door hanger 21 is hung on the landing door track 15a.

[0040] The landing door linkage mechanism 18 has a first landing door pulley 22, a second landing door pulley 23, an annular linkage rope 24, a first landing door connecting fitting 25, and a second landing door connecting fitting 26.

[0041] The first landing door pulley 22 and the second landing door pulley 23 are arranged on the landing door crossbeam 15 at intervals in the width direction of the landing door entrance 14a. The linkage rope 24 is wound around the first landing door pulley 22 and the second landing door pulley 23.

[0042] The first landing door 16 is connected to the lower part of the linkage rope 24 via the first landing door connecting fitting 25. The second landing door 17 is connected to the upper part of the linkage rope 24 via the second landing door connecting fitting 26.

[0043] When the linkage rope 24 circulates due to the opening and closing movement of the first landing door 16, the second landing door 17 moves in the direction opposite to that of the first landing door 16. That is, the landing door linkage mechanism 18 makes the opening and closing movements of the second landing door 17 linked to those of the first landing door 16.

[0044] The interlocking device 19 is provided between the landing door beam 15 and the first landing door 16. In addition, the interlocking device 19 prevents the landing doorway 14a from being opened from the landing side when the car 8 is not stopped.

[0045] In addition, the interlocking device 19 includes a hook 27 , an interlocking latch 28 , a fixed-side interlocking roller 29 , and a movable-side interlocking roller 30 .

[0046] The hook 27 is fixed to the landing door crossbeam 15. The interlocking 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 end of the interlocking latch 28 is hooked on the hook 27, thereby preventing the first landing door 16 and the second landing door 17 from moving in the opening direction.

[0047] The fixed-side interlock roller 29 is disposed coaxially with the rotation axis of the interlock latch 28. The movable-side interlock roller 30 is attached to the interlock latch 28. Thus, the movable-side interlock roller 30 can move along an arc centered on the rotation axis of the interlock latch 28.

[0048] The door closer always applies a force in the closing direction, ie, a self-closing force, to the first and second landing doors 16 and 17. The door closer generates the self-closing force of the first and second landing doors 16 and 17 by, for example, utilizing the gravity acting on the door closer hammer.

[0049] Figure 3 Viewed from the landing side Figure 1 The car door device 12 is a front view of a part of the car door device 12. 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-side coupling mechanism 60, and a restriction device 50.

[0050] The car chamber 11 is provided with a car entrance 11a. The car door cross beam 31 is fixed to the car 8 above the car entrance 11a. The car door rail 31a is provided on the car door cross beam 31. The car door rail 31a is parallel to the width direction of the car entrance 11a and is horizontal. The width direction of the car entrance 11a is parallel to the opening and closing direction of the first car door 32 and the second car door 33. Figure 3 left and right direction.

[0051] The first car door 32 and the second car door 33 are suspended from the car door rail 31a. The first car door 32 and the second car door 33 are guided by the car door rail 31a and move in opposite directions when the car doorway 11a is opened and closed.

[0052] The first car door 32 and the second car door 33 each include a car door body 41 and a car door hanger 42. Each car door body 41 opens and closes the car entrance 11a.

[0053] The car door hanger 42 is fixed to the upper part of the car door main body 41. In addition, the car door hanger 42 is hung on the car door track 31a.

[0054] In addition, the car door hanger 42 has a hanger plate 42a, a plurality of hanger rollers 42b, and a plurality of upward push rollers (not shown).

[0055] The hanger plate 42a is fixed to the upper part of the car door main body 41. Each hanger roller 42b is rotatably provided on the hanger plate 42a. In addition, each hanger roller 42b is placed on the car door track 31a. In addition, each hanger roller 42b moves while rolling on the car door track 31a during the opening and closing operations of the first car door 32 and the second car door 33.

[0056] Each upward push roller is provided on the hanger plate 42a directly below the corresponding hanger roller 42b. In addition, each upward push roller is arranged below the car door track 31a. In addition, each upward push roller prevents the corresponding hanger roller 42b from falling off the car door track 31a.

[0057] The car door drive mechanism 34 is provided on the car door crossbeam 31. In addition, the car door drive mechanism 34 has a door motor 44, a first car pulley 45, a second car pulley 46, an annular drive belt 47, a first car door connecting fitting 48, and a second car door connecting fitting 49.

[0058] The door motor 44 is fixed to the car door crossbeam 31. The first car pulley 45 is mounted on the rotating shaft of the door motor 44. The door motor 44 rotates the first car pulley 45.

[0059] The second car pulley 46 is provided on the car door crossbeam 31 at an interval from the first car pulley 45 in the width direction of the car entrance 11a. The drive belt 47 is wound around the first car pulley 45 and the second car pulley 46.

[0060] The first car door 32 is connected to the lower side portion of the drive belt 47 via the first car door connecting fitting 48. The second car door 33 is connected to the upper side portion of the drive belt 47 via the second car door connecting fitting 49.

[0061] When the first car pulley 45 rotates, the drive belt 47 circulates, and the first car door 32 and the second car door 33 move in opposite directions. That is, the drive belt 47 transmits the driving force of the door motor 44 to the first car door 32 and the second car door 33.

[0062] The car side connection mechanism 60 is provided between the first car door 32 and the car door crossbeam 31. In addition, the car side connection mechanism 60 has a mounting plate 61, a door stop side door knife 62, a door pocket side door knife 63, and a door knife drive mechanism 64.

[0063] The mounting plate 61 is mounted on the first car door 32. The door stop side door knife 62 and the door jamb side door knife 63 are respectively mounted on the mounting plate 61. In addition, the door stop side door knife 62 and the door jamb side door knife 63 are parallel to each other and arranged along the vertical direction.

[0064] The door jamb side door knife 63 is arranged on the door jamb side with respect to the door stop side door knife 62. In addition, the door jamb side door knife 63 can be displaced relative to the door stop side door knife 62 in a direction approaching and departing from the door stop side door knife 62.

[0065] The door knife drive mechanism 64 displaces the door jamb side door knife 63 in association with the opening and closing operation of the first car door 32.

[0066] When the car 8 stops and the first car door 32 performs an opening operation, the movable side interlock roller 30 and the fixed side interlock roller 29 are clamped between the door stop side door knife 62 and the door jamb side door knife 63. That is, the car side connection mechanism 60 is connected to the interlock device 19. Thereby, the interlock latch 28 rotates Figure 2 in the clockwise direction, and the interlock device 19 is unlocked.

[0067] Therefore, the car side connection mechanism 60 can connect the first car door 32 to the first landing door 16 and make the opening and closing operations of the first landing door 16 and the first car door 32 interlock.

[0068] The door knife drive mechanism 64 includes a first link 65, a second link 66, a connecting member 67, a connecting rod 68, a connection mechanism roller 69, and a connection mechanism cam 70.

[0069] The first end portion of the first link 65 is mounted on the mounting plate 61 so as to be rotatable about the first link shaft 65a. The second end portion of the first link 65 is rotatably connected to the middle portion of the door jamb side door knife 63.

[0070] The second link 66 is disposed below the first link 65. The middle portion of the second link 66 is mounted on the mounting plate 61 so as to be rotatable about the second link shaft 66a. The first end portion of the second link 66 is rotatably connected to the lower end portion of the door jamb side door knife 63. The portion of the second link 66 from the middle portion to the first end portion is parallel to the first link 65.

[0071] The connecting member 67 is mounted on the mounting plate 61 above the first link 65 so as to be rotatable about the connecting member shaft 67a. The outer shape of the connecting member 67 is a fan-shaped flat plate.

[0072] The upper end portion of the connecting rod 68 is rotatably connected to the first end portion of the connecting member 67. The lower end portion of the connecting rod 68 is rotatably connected to the second end portion of the second link 66.

[0073] The connecting mechanism roller 69 is rotatably mounted on the second end portion of the connecting member 67. Further, the connecting mechanism roller 69 moves together with the first car door 32.

[0074] The connecting mechanism cam 70 is fixed to the car door cross member 31. When the first car door 32 and the second car door 33 are in the fully closed position, the connecting mechanism roller 69 abuts against the connecting mechanism cam 70. Further, when the first car door 32 moves away from the fully closed position, the connecting mechanism roller 69 moves away from the connecting mechanism cam 70.

[0075] The restricting device 50 is provided on the car door cross member 31. Further, the restricting device 50 allows the opening and closing operations of the first car door 32 and the second car door 33 caused by the door motor 44, and restricts the closing operations of the first car door 32 and the second car door 33 caused by the self-closing forces of the first landing door 16 and the second landing door 17.

[0076] Further, the restricting device 50 has a restricting device main body 51 and a bracket 52. The restricting device main body 51 is mounted on the car door cross member 31 via the bracket 52. Further, the restricting device main body 51 is a leaf spring member formed by bending a strip-shaped spring steel.

[0077] Figure 4 is an explanatory diagram showing Figure 3 the relationship between the restricting device main body 51 and the connecting mechanism roller 69. Further, Figure 4 the solid line in

[0078] shows the positional relationship between the restricting device main body 51 and the connecting mechanism roller 69 when the first car door 32 is in the fully open position. Figure 4 The allowing position is Figure 4 the position shown by the one-dot chain line in

[0079] As Figure 4 shown by the solid line in

[0080] the closing operations of the first car door 32 and the second car door 33 caused by the self-closing forces of the first landing door 16 and the second landing door 17 are restricted by the connecting mechanism roller 69 abutting against the movable portion 51a in the restricting position. During the opening and closing operations of the first car door 32 and the second car door 33 caused by the door motor 44, the movable portion 51a is pressed by the connecting mechanism roller 69, whereby the return spring portion 51b is elastically deformed and the movable portion 51a is displaced to the allowing position. Thereby, the connecting mechanism roller 69 is allowed to pass through the movable portion 56a, and the opening and closing operations of the first car door 32 and the second car door 33 are allowed.

[0081] The opening and closing force of the door motor 44 is greater than the self-closing force of the first landing door 16 and the second landing door 17. The elastic force of the return spring portion 51b is set to a value that is greater than the self-closing force of the first landing door 16 and the second landing door 17 and smaller than the opening and closing force of the door motor 44. In addition, the elastic force of the return spring portion 51b is set to a value that is closer to the self-closing force than the intermediate value between the self-closing force of the first landing door 16 and the second landing door 17 and the opening and closing force of the door motor 44.

[0082] Figure 5 Is an enlarged view Figure 3 The front view of the car-side connecting mechanism 60, showing the state of the car-side connecting mechanism 60 when the first car door 32 and the second car door 33 are in the fully closed position.

[0083] When the car 8 stops, the movable-side interlock roller 30 and the fixed-side interlock roller 29 are located between the door stop-side door knife 62 and the door pocket-side door knife 63. However, the door pocket-side door knife 63 is separated from the movable-side interlock roller 30 and the fixed-side interlock roller 29.

[0084] Figure 6 Is the front view of the car-side connecting mechanism 60 after the first car door 32 and the second car door 33 have just started to open. When the first car door 32 moves from the fully closed position in the opening direction, the connecting mechanism roller 69 moves downward along the connecting mechanism cam 70, and the connecting member 67 rotates Figure 6 In the clockwise direction.

[0085] In addition, the door pocket-side door knife 63 moves in the direction approaching the door stop-side door knife 62, and the first link 65 and the second link 66 rotate Figure 6 In the clockwise direction respectively, and the connecting rod 68 moves upward.

[0086] As a result, the movable-side interlock roller 30 and the fixed-side interlock roller 29 are clamped between the door stop-side door knife 62 and the door pocket-side door knife 63, and the interlock device 19 is unlocked. After that, the first car door 32 and the first landing door 16 move in the opening direction together.

[0087] Figure 7 Is the front view of the car-side connecting mechanism 60 and the restricting device main body 51 before the first car door 32 and the second car door 33 are about to reach the fully open position. Figure 8 Is the front view of the car-side connecting mechanism 60 and the restricting device main body 51 when the first car door 32 and the second car door 33 reach the fully open position.

[0088] The connecting mechanism roller 69 abuts against the restricting device main body 51 during the opening and closing operations of the first car door 32 and the second car door 33. Specifically, during the opening operation of the first car door 32 and the second car door 33, before the first car door 32 and the second car door 33 reach the fully open position, the connecting mechanism roller 69 abuts against the movable part 51a.

[0089] After that, the movable part 51a is pushed upward to the allowable position by the connecting mechanism roller 69, and the connecting mechanism roller 69 passes through the movable part 51a. Figure 8 In this state, the closing operations of the first car door 32 and the second car door 33 caused by the self-closing forces of the first landing door 16 and the second landing door 17 are restricted by the abutment of the connecting mechanism roller 69 against the movable part 51a.

[0090] In a state where the closing operations of the first car door 32 and the second car door 33 caused by the self-closing forces of the first landing door 16 and the second landing door 17 are restricted, the connecting mechanism roller 69 receives a reaction force from the restricting device main body 51 in the direction opposite to the direction of arrow A shown in Figure 8 In this state, the inclination angle of the portion of the movable part 51a that abuts against the connecting mechanism roller 69 is set such that the direction of the reaction force from the restricting device main body 51 is closer to the landing-side door knife 63 side than the connecting member shaft 67a.

[0091] In such a car door device 12 of an elevator, the restricting device main body 51 is provided on the car door cross beam 31 at a position where it abuts against the connecting mechanism roller 69. Therefore, it is possible to easily have the function of restricting the closing operations of the first car door 32 and the second car door 33 caused by the self-closing forces of the first landing door 16 and the second landing door 17 by using the connecting mechanism roller 69, which is a component that is originally required.

[0092] Thus, for example, in an emergency elevator, even when a power failure occurs after a firefighter moves from the car 8 to the landing, it is possible to suppress the closing operations of the first car door 32 and the second car door 33 due to the self-closing forces of the first landing door 16 and the second landing door 17.

[0093] In addition, the restricting device main body 51 is a leaf spring component. Therefore, it is possible to restrict the closing operations of the first car door 32 and the second car door 33 with a simple structure, and cost reduction can be achieved.

[0094] In addition, the inclination angle of the portion of the movable part 51a that abuts against the connecting mechanism roller 69 is set such that the direction of the reaction force from the restricting device main body 51 is closer to the landing-side door knife 63 side than the connecting member shaft 67a. Therefore, by the reaction force from the restricting device main body 51, it is possible to suppress the displacement of the landing-side door knife 63 in the direction away from the landing-stop-side door knife 62. Thus, it is possible to more reliably maintain the connection state between the first car door 32 and the first landing door 16.

[0095] In addition, the elastic force of the return spring portion 51b is set to a value closer to the self-closing force than the intermediate value between the self-closing forces of the first landing door 16 and the second landing door 17 and the opening / closing force of the door motor 44. Therefore, the normal opening / closing operation caused by the door motor 44 can be made smooth, and the generation of noise during the normal opening / closing operation can be suppressed.

[0096] Embodiment 2.

[0097] Next, Figure 9 is a front view of a part of the car door device 12 of Embodiment 2 as viewed from the landing side. In Embodiment 2, the restricting device 80 is used instead of the restricting device 50 in Embodiment 1. The restricting device 80 is provided on the car door cross member 31.

[0098] The restricting device 80 of Embodiment 2 has a restricting device main body 81. That is, the restricting device 80 of Embodiment 2 is constituted by the restricting device main body 81.

[0099] Figure 10 is a front view of Figure 9 the restricting device main body 81. The restricting device main body 81 has a holding member 82, a pressing spring 83 as a return spring portion, and a movable member 84 as a movable part.

[0100] The holding member 82 is fixed to the car door cross member 31. A receiving hole 82a is provided in the holding member 82. The pressing spring 83 is received in the receiving hole 82a. That is, the pressing spring 83 is provided inside the holding member 82. The upper end of the pressing spring 83 is fixed to the bottom surface of the receiving hole 82a.

[0101] The movable member 84 is fixed to the lower end of the pressing spring 83. A ball is used as the movable member 84. That is, the restricting device main body 81 of Embodiment 2 is a ball plug.

[0102] In addition, the movable member 84 can Figure 10 shift up and down relative to the holding member 82 between the restricting position shown in Figure 11 and the allowing position shown in

[0103] By the connecting mechanism roller 69 abutting against the movable member 84 in the restricting position, the closing operation of the first car door 32 and the second car door 33 caused by the self-closing forces of the first landing door 16 and the second landing door 17 is restricted.

[0104] The allowing position is a position where the movable member 84 is retracted into the holding member 82. The pressing spring 83 returns the movable member 84 from the allowing position to the restricting position.

[0105] During the opening and closing operations of the first and second car doors 32 and 33 caused by the door motor 44, the movable member 84 is pressed by the connecting mechanism roller 69. As a result, the compression spring 83 is elastically deformed, and the movable member 84 is displaced to the permitted position. Thereby, the connecting mechanism roller 69 is allowed to pass through the movable member 84, and the opening and closing operations of the first and second car doors 32 and 33 are permitted.

[0106] The elastic force of the compression spring 83 is set to a value that is greater than the self-closing force of the first landing door 16 and the second landing door 17 and smaller than the opening and closing force of the door motor 44. In addition, the elastic force of the compression spring 83 is set to a value that is closer to the self-closing force than the intermediate value between the self-closing forces of the first landing door 16 and the second landing door 17 and the opening and closing force of the door motor 44.

[0107] Other structures and operations in the second embodiment are the same as those in the first embodiment.

[0108] With such a restricting device 80, the same effects as those in the first embodiment can also be obtained.

[0109] In addition, the compression spring 83 is housed in the holder 82. In addition, the movable member 84 is fixed to the compression spring 83. Therefore, the expansion and contraction of the compression spring 83 is guided by the holder 82, and the movable member 84 can be appropriately displaced between the restricted position and the permitted position.

[0110] In addition, the movable member 84 is a ball. Therefore, a commercially available ball plug can be used as the restricting device main body 81, and cost reduction can be achieved.

[0111] In addition, in the first and second embodiments, the positions of the first and second car doors 32 and 33 whose closing operations are restricted by the restricting devices 50 and 80 are preferably the fully open positions, but are not necessarily limited to the fully open positions, and may also be positions closer to the door stop side, that is, the closing side, than the fully open positions.

[0112] In addition, the restricting devices 50 and 80 in the first and second embodiments can of course be provided in newly installed elevators, and can also be provided in existing elevators.

[0113] In addition, in the first and second embodiments, the number of car doors is not limited to two, and may be one or three or more.

[0114] In addition, in the first and second embodiments, the center-opening type car door device 12 is shown, but the restricting devices 50 and 80 can also be applied to the single-side opening type car door device 12.

[0115] In addition, the overall layout of the elevator is not limited to Figure 1 the layout. For example, the rope winding method can also be the 2:1 rope winding method.

[0116] In addition, the elevator can also be a machine-room-less elevator, a double-deck elevator, an elevator with multiple cars in a single hoistway, etc. The multiple-car-in-single-hoistway method is a method in which the upper car and the lower car arranged directly below the upper car move up and down independently in a common hoistway.

Claims

1. An elevator car door device, comprising: A car door crossbeam, which is arranged on the car; a door motor, which is arranged on the car; A car door, which is arranged in the car and is opened and closed by the door motor; A car-side coupling mechanism that couples the car door to a landing door so that the landing door and the car door can be opened and closed in conjunction with each other; and a limiting device that allows the opening and closing action of the car door caused by the door motor and limits the closing action of the car door caused by the self-closing force of the landing door, The car-side connection mechanism has a connection mechanism roller, and the connection mechanism roller is provided on the car door and moves together with the car door. The limiting device comprises a limiting device body arranged on the car door cross beam, The limiting device body comprises: a movable portion that is displaceable between a restricting position and a allowing position; and a return spring portion that returns the movable portion from the allowing position to the limiting position, The connecting mechanism roller contacts the movable portion located at the limiting position, thereby limiting the closing action of the car door caused by the self-closing force of the landing door. When the car door is opened or closed by the door motor, the movable portion is pressed by the coupling mechanism roller, whereby the return spring portion is elastically deformed and the movable portion is displaced to the allowing position.

2. The elevator car door device according to claim 1, wherein: The limiting device is a leaf spring member.

3. The elevator car door device according to claim 2, wherein: The car side connection mechanism also has: A door stopper side door knife, which is arranged on the car door; a door pocket side door knife, which is disposed on the car door in a manner capable of shifting toward and away from the door stop side door knife, and has an interlocking roller sandwiched between the door pocket side door knife and the door stop side door knife; and The door knife driving mechanism displaces the door knife on the door frame side in conjunction with the opening and closing action of the car door. The door knife driving mechanism comprises: The linking mechanism roller; and a connecting member provided on the car door in a manner rotatable about a connecting member axis, wherein the connecting mechanism roller is provided on the connecting member, The inclination angle of the portion of the movable portion that contacts the coupling mechanism roller is set so that the direction of the reaction force from the restriction device body to the coupling mechanism roller is closer to the door frame-side door blade side than the coupling member axis.

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