Elevator landing door engagement device and elevator

Abstract

To provide an elevator landing door engagement device that offers high operational reliability and requires no fine adjustments. [Solution] The device includes a pair of cams 601 and 602 that are rotatable between a retracted position, which is spaced away from the landing door 36 and cannot engage with the engaged portion 384, and an extended position, which is close to the landing door 36 and can engage with the engaged portion 384, and an operating unit 603 that rotates the pair of cams 601 and 602 from the retracted position to the extended position by applying force to the pair of cams 601 and 602 as the constraint by contact is released when the car door 56 is opened, while the car door 56 is in contact with the contact portion 611 when the car door 56 is fully closed.

Description

Technical Field

[0001] The present invention relates to a landing door engaging device and an elevator of an elevator that is provided in a car door device and engages with an engaged portion of a landing door when the car door is opened, so as to open the landing door along with the opening operation of the car door.

Background Art

[0002] As one form of a landing door engaging device, a pair of vertically long cams (movable cams) spaced apart at a predetermined interval in the left-right direction are provided at positions protruding from the car door toward the landing door, and engage with a roller (engaged portion) of a door locking device of the landing door to transmit a driving force for an opening operation to the landing door. A structure is known.

[0003] In this type of landing door engaging device, the movable cam widens the interval to ensure sufficient clearance so as not to contact the roller of the door locking device of the landing door when the car passes through a passing floor. However, for example, due to a state where the car is tilted due to uneven load or deformation of the car door due to an impact on the car door, if the movable cam is displaced to a position where it interferes with the roller of the door locking device of the landing door or other landing equipment, the movable cam and these devices interfere with each other during the running of the car, resulting in a problem of damage.

[0004] In order to solve this problem, a landing door engaging device has been proposed that retracts the movable cam to the car side during the running of the car and advances it to the landing door side during operation. For example, the landing door engaging device described in Patent Document 1 uses a solenoid to extend and retract the movable cam, and the landing door engaging devices described in Patent Documents 2 to 4 use a mechanical mechanism to extend and retract the movable cam.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] However, the landing door engagement device described in Patent Document 1 uses a solenoid, which is an electrical element, so there is a concern that electrical malfunctions may occur, and its operational reliability is not necessarily sufficiently high. The landing door engagement devices described in Patent Documents 2 to 4 are constructed using a mechanical mechanism, so their operational reliability is high, but the adjustment work required to prevent the movable cam from colliding with the roller when it extends is complicated.

[0007] Therefore, the present invention has been made in view of these circumstances, and aims to provide an elevator landing door engagement device and elevator that are highly reliable in operation and do not require fine adjustment work. [Means for solving the problem]

[0008] The elevator landing door engagement device according to the present invention is An elevator landing door engagement device provided in the car door device, which engages with the engaged portion of the landing door when the car door is opened, thereby opening the landing door in conjunction with the opening of the car door, A pair of cams, each vertically elongated and spaced apart with a predetermined distance between them in the left-right direction, each rotatable about the vertical direction at the point on the other cam side, and each cam rotatably moving between a retracted position, where it is spaced away from the landing door and cannot engage with the engaging part, and an extended position, where it is close to the landing door and can engage with the engaging part. The device includes an operating unit that allows rotation around the front-rear direction between a pair of cams, and when the car door is fully closed, the contact point is in contact with the contact point, but as the car door opens, the constraint caused by the contact is released, allowing it to rotate from a first state to a second state. This rotation from the first state to the second state applies force to the pair of cams, causing them to rotate from a retracted position to an extended position. This is an elevator landing door engagement device.

[0009] As one embodiment of the elevator landing door engagement device according to the present invention, A pair of cams, Each comprises a vertically elongated strip-shaped first portion and a second portion that protrudes in a direction intersecting the other cam-side portion of the first portion. The pair of second parts rotate due to the force generated by the rotation of the operating part located between them, and rotate from the retracted position to the extended position. This configuration can be adopted.

[0010] As one embodiment of the elevator landing door engagement device according to the present invention, A cam is an angle material, where one of two perpendicular parts of the angle material is the first part and the other is the second part. This configuration can be adopted.

[0011] As one embodiment of the elevator landing door engagement device according to the present invention, The operating part has a tip surface where the distance to the axis of rotation of the operating part decreases as it approaches the tip. This configuration can be adopted.

[0012] As one embodiment of the elevator landing door engagement device according to the present invention, When the cage door is of the center-opening type, the left and right cage doors each have a connecting body for connecting the cage door to the moving part of the door opening and closing device. The connecting body is configured to be movable within a predetermined range in the opening and closing direction of the car door throughout the entire car door. A pair of cams and an operating part are attached to one car door, The contact part is attached to the connecting body of the other car door via an arm and the configuration can be adopted.

[0013] The elevator according to the present invention comprises the landing door engaging device of any of the above elevators and is an elevator.

Effect of the Invention

[0014] According to the present invention, the device is configured by using a mechanical mechanism without the concern of electrical defects. Therefore, according to the present invention, high operating reliability can be obtained. Further, according to the present invention, there is no concern of collision between the engaged part of the landing door and the pair of cams when they protrude toward the landing door side. Therefore, according to the present invention, fine adjustment work can be made unnecessary.

Brief Description of the Drawings

[0015] [Figure 1] Fig. 1 is a perspective view of an elevator. [Figure 2] Fig. 2(a) is a front view of the car seen from the landing side with the car door fully closed. Fig. 2(b) is a front view of the car with the car door fully open. [Figure 3] Fig. 3 is a partial cross-sectional side view of the car door device and the landing door device. [Figure 4] Fig. 4(a) is a front view of the door lock device in the locked state seen from inside the hoistway. Fig. 4(b) is a front view of the door lock device in the unlocked state. [Figure 5] Fig. 5(a) is a front view of the landing door engaging device in the non-operating state with the car door fully closed seen from the landing side. Fig. 5(b) is a front view of the landing door engaging device in the operating state when the car door starts to open. [Figure 6]Figure 6(a) is a perspective view of the schematic configuration of the landing door engagement device in a non-operating state. Figure 6(b) is a perspective view of the schematic configuration of the landing door engagement device in an operating state. [Figure 7] Figure 7 is an explanatory diagram of the operation of the landing door engagement device. [Modes for carrying out the invention]

[0016] The following describes one embodiment of an elevator equipped with a landing door engagement device according to the present invention.

[0017] As shown in Figure 1, the elevator 1 comprises a hoistway 2 and a car 5. The hoistway 2 extends vertically within a building with multiple floors. The car 5 moves up and down within the hoistway 2 by the drive of a drive unit, and stops at a designated floor when the drive unit is stopped.

[0018] The elevator car 5 is equipped with an elevator car door device 55. The elevator car door device 55 comprises an elevator car door 56, a door support structure 57, and a door opening and closing device 58. The elevator car door 56 moves in the left-right direction (horizontal direction from left to right, hereinafter the same) to open and close the opening at the front of the elevator car 5 (elevator entrance / exit) and allow people to get on and off. The door support structure 57 is a structure that supports the elevator car door 56 while enabling its opening and closing operation. The door opening and closing device 58 is a device for opening and closing the elevator car door 56.

[0019] In contrast, the landing 30 on each floor is equipped with a three-sided frame 31 and a landing door device 35. The three-sided frame 31 is formed on the wall surface, and the inside of the frame is an opening of a size corresponding to the opening of the elevator car 5. The landing door device 35 is equipped with a landing door 36 and a door support structure 37. The landing door 36 moves in the left-right direction to open and close the opening (landing entrance) in the three-sided frame 31, allowing people to get on and off. The landing door 36 is normally closed by an elastic force, and opens against the elastic force in response to the opening movement of the elevator car door 56 of the elevator car 5 when it is stopped on the floor, and closes by the elastic force in conjunction with the closing movement of the elevator car door 56. The door support structure 37 is a structure that supports the landing door 36 while enabling the opening and closing movement of the landing door 36.

[0020] As shown in Figures 2 and 3, the car door 56 comprises a door panel 560, a door hanger 561, and a connecting body 563. The door panel 560 is arranged along a vertical plane and is the main body of the car door 56 that opens and closes the opening 5a of the car 5. The door hanger 561 is integrally attached to the upper end of the door panel 560. The door hanger 561 comprises a pair of rollers 562, 562. The pair of rollers 562, 562 are spaced apart in the left-right direction at the upper end of the door hanger 561. The connecting body 563 is attached at the upper end of the door hanger 561 between the pair of rollers 562, 562. The connecting body 563 is a device that connects the car door 56 (and its door hanger 561) to the drive belt 584 of the door opening and closing device 58, which will be described later.

[0021] The door support structure 57 comprises a door rail 570 and a sill 571. The door rail 570 is formed in the shape of a strip and is provided in the left-right direction on the upper front of the car 5. The rollers 562, 562 of the door hanger 561 are placed on the upper edge of the door rail 570, so that the car door 56 is suspended from the door rail 570 in a state that allows it to slide left-right along the door rail 570. The door rail 570 is a structure that supports the upper part of the car door 56 while enabling the opening and closing operation of the car door 56. On the other hand, the sill 571 is provided in the left-right direction on the lower front of the car 5 along the lower edge of the opening 5a of the car 5, and so that both ends extend to the left and right beyond the lower edge of the opening 5a. The sill 571 is a structure that supports the lower part of the car door 56 while enabling the opening and closing operation of the car door 56.

[0022] The landing door 36 and door support structure 37 have the same structure as the car door 56 and door support structure 57.

[0023] The door opening and closing device 58 comprises a drive motor 580, a reduction pulley 581, a pair of pulleys 582, 582, a reduction belt 583, and a drive belt 584. The drive motor 580 is provided on the upper front part of the car 5. The reduction pulley 581 is provided on either the left or right end of the upper front part of the car 5. One pulley 582 is provided coaxially and integrally with the reduction pulley 581. The other pulley 582 is provided on either the left or right end of the upper front part of the car 5. The reduction belt 583 is an endless belt wrapped between the drive shaft of the drive motor 580 and the reduction pulley 581. The drive belt 584 is an endless belt wrapped between the pair of pulleys 582, 582. The drive belt 584 is provided in the left-right direction and is provided parallel to the door rail 570.

[0024] When the drive motor 580 is driven, rotation is transmitted to the reduction pulley 581 via the reduction belt 583, causing the reduction pulley 581 and pulley 582 to rotate, and consequently the drive belt 584 to move in a circular motion. As a result, the two car doors 56, 56 on the left and right reciprocate along the door rail 570, opening and closing. One car door 56 is connected to one side of the drive belt 584 by a connecting body 563, and the other car door 56 is connected to the other side of the drive belt 584 by a connecting body 563. As a result, the pair of car doors 56, 56 move in opposite directions. That is, the car door device 55 and the landing door device 35 are of the center-open type, in which the opening 5a of the car 5 opens from the center. The drive belt 584 is one form of the moving body of the present invention.

[0025] The elevator car door device 55 includes a landing door engagement device 60. The landing door engagement device 60 engages with the engaged portion of the landing door 36 when the elevator car door 56 is opened, thereby opening the landing door 36 in conjunction with the opening of the elevator car door 56. Details of the landing door engagement device 60 will be described later.

[0026] As shown in Figure 4, the landing door device 35 includes a door lock device 38. The door lock device 38 has a configuration on the landing entrance side that includes a locked portion 380a of the locked member 380 and a switch 381 of the door closing detection unit, and a configuration on the landing door 36 side that includes a lock member 382 and a conductor portion 383.

[0027] The locking member 380 and the switch 381 are attached directly or indirectly via brackets or the like to the inner wall surface 2A of the hoistway 2 around the landing entrance. The locking member 382 is pivotably attached to the door hanger 361, and when the landing door 36 is fully closed, it pivots so that its tip is vertically downward and engages with the locking member 380a (locked state). The conductor 383 is attached to the tip of the locking member 382, ​​and when the locking member 382 is in the locked state, it contacts a pair of terminals (not shown) of the switch 381 and acts to turn the switch 381 ON (or OFF). The control unit of the elevator 1 determines that the landing door 36 is in the fully closed state based on the ON signal (or OFF signal) of the switch 381.

[0028] On the other hand, the locking member 382 swings so that its tip rises vertically upward when the landing door engaging device 60 of the car door device 55 engages with the roller 384 on the locking member 382 as the car door 56 opens, releasing the engagement with the locked portion 380a (unlocked state). When the locking member 382 is in the unlocked state, the conductor portion 383 separates from the pair of terminals of the switch 381, turning the switch 381 OFF (or ON). Based on the OFF signal (or ON signal) of the switch 381, the control unit of the elevator 1 determines that the landing door 36 is not in a fully closed state. Note that the roller 384 is one form of the engaged portion of the present invention.

[0029] As shown in Figures 5 and 6, the landing door engagement device 60 comprises a base 600, a first cam 601 and a second cam 602, and an operating member 603. The base 600 is attached to the door hanger 561 of the car door 56. The first cam 601 and the second cam 602 are rotatably (swingably) supported on the base 600 with a vertical axis. The operating member 603 is rotatably (swingably) supported on the base 600 with an axis perpendicular to the vertical plane of the car door 56 (front-rear direction (front-rear horizontal direction, hereinafter the same)). Note that the operating member 603 is one embodiment of the operating part of the present invention.

[0030] The base 600 is a metal component comprising a main body 600a and support pieces 600b to 600e. The main body 600a is a vertically elongated plate and is attached to the door hanger 561 of the car door 56 at its center. The upper first support piece 600b is a piece that protrudes forward from the upper part of the main body 600a on the side where the car door 56 closes. The lower first support piece 600c is a piece that protrudes forward from the lower part of the main body 600a on the side where the car door 56 closes. The upper second support piece 600d is a piece that protrudes forward from the upper part of the main body 600a on the side where the car door 56 opens. The lower second support piece 600e is a piece that protrudes forward from the lower part of the main body 600a on the side where the car door 56 opens. The upper first support piece 600b and the lower first support piece 600c rotatably support the first cam 601 at their tips. The upper second support piece 600d and the lower second support piece 600e rotatably support the second cam 602 at their tips. As an example, the base 600 (main body 600a and support pieces 600b to 600e) is formed from a single sheet of metal material through cutting and bending processes.

[0031] The first cam 601 and the second cam 602 are metal members, mounted vertically in an elongated shape, and mounted parallel to each other with a predetermined spacing in the left-right direction. The first cam 601 and the second cam 602 are elongated angle materials, comprising orthogonal strip-shaped first portions 601a, 602a and second portions 601b, 602b. The widths of the first portions 601a, 602a and the second portions 601b, 602b are the same. Alternatively, the width of one of them may be greater than the width of the other.

[0032] The first cam 601 and the second cam 602 are arranged symmetrically with respect to the vertical center line between them. As a result, the first parts 601a and 602a are in a symmetrical positional relationship, and the second parts 601b and 602b are in a symmetrical positional relationship.

[0033] The first cam 601 and the second cam 602 are rotatably supported at the tips of the support pieces 600b to 600e of the base 600 at the intersection (or near thereto) of the first portion 601a, 602a and the second portion 601b, 602b, and are rotatably mounted about the vertical. More specifically, the first cam 601 and the second cam 602 are positioned such that i) the first portion 601a, 602a are aligned on a plane parallel to the vertical plane of the car door 56, and the second portion 601b, 602b are parallel to the first portion 601a, 602a behind them and facing each other in the left-right direction, thereby moving the first portion 601a, 602a away from the landing door 36 and reaching a retracted position in which they cannot engage with the roller 384 of the door lock device 38 of the landing door 36 in the left-right direction. (Figures 5(a), 6(a)) and ii) the first parts 601a, 602a are parallel to the second parts 601b, 602b in front of them and face each other in the left-right direction, and the second parts 601b, 602b are aligned on a plane parallel to the vertical plane of the car door 56, so that the first parts 601a, 602a are rotatably movable between an advanced position (Figures 5(b), 6(b)) where they approach the landing door 36 and can engage with the roller 384 in the left-right direction.

[0034] The first cam 601 and the second cam 602 simultaneously switch between the retracted position and the extended position by rotating 90 degrees in opposite directions, one clockwise and the other counterclockwise. When the landing door engagement device 60 is not in operation, the first cam 601 and the second cam 602 are in the retracted position due to the elastic force of the elastic material. When the landing door engagement device 60 is in operation, they rotate from the retracted position to the extended position due to the pressing force of the operating member 603 (pressing force that opposes the elastic force of the elastic material). Although not shown, the elastic material is a tension spring or torsion spring provided between the base 600 and the first cam 601 and the second cam 602, and it biases the first cam 601 and the second cam 602 with an elastic force to rotate from the extended position to the retracted position. However, when the first cam 601 and the second cam 602 are in the retracted position, the support pieces 600b to 600e of the base 600 lock the first cam 601 and the second cam 602 (the second parts 601b and 602b) and act as stoppers to restrict further rotation of the first cam 601 and the second cam 602.

[0035] The operating member 603 comprises a main body portion 603a. The main body portion 603a is rotatably supported at its center on the main body portion 600a of the base 600 between the first cam 601 and the second cam 602, and is rotatably mounted about a direction perpendicular to the vertical plane of the car door 56. The main body portion 603a has a long rectangular parallelepiped shape (block-like, prism-like shape) in the direction parallel to the vertical plane of the car door 56 (first direction). The length of the main body portion 603a in the first direction is such that the main body portion 603a can engage with the first cam 601 and the second cam 602.

[0036] The main body 603a has a base end surface and a tip end surface in a direction perpendicular to the vertical plane of the cage door 56 (a second direction perpendicular to the first direction). An axis is provided on the base end surface along the second direction, and the operating member 603 is rotatable about this axis. The tip end surface is a surface whose distance from the axis of rotation decreases as it approaches the tip, and the width of the main body 603a narrows as it approaches the tip. For example, the tip end surface is a curved surface (arc surface) with a semicircular or semielliptical cross-sectional shape. Alternatively, as another example, the tip end surface is a surface with a triangular or trapezoidal cross-sectional shape.

[0037] The operating member 603 further includes an input section 603b. The input section 603b is a portion that extends from one end of the main body 603a.

[0038] The operating member 603 is rotatably provided to move between a first state in which the main body portion 603a is upright and positioned between the first cam 601 and the second cam 602 (Figures 5(a) and 6(a)), and a second state in which the inclination of the main body portion 603a becomes gentler, increasing the distance between both ends in the left-right direction, and causing both ends to overlap with the first cam 601 and the second cam 602 when viewed from the front-rear direction (Figures 5(b) and 6(b)).

[0039] The operating member 603 is subjected to the elastic force of an elastic material. Although not shown in the figures, the elastic material is a tension spring or torsion spring provided between the base 600 and the operating member 603, and it biases the operating member 603 with an elastic force so that it rotates from the first state to the second state. However, in the second state of the operating member 603, a stopper 604 provided on the base 600 locks the operating member 603 (its main body portion 603a) and restricts further rotation of the operating member 603.

[0040] The first state is when the operating member 603 rotates against an elastic biasing force, and the input part 603b contacts the roller 611 when the car door 56 is fully closed. The second state is when the operating member 603 rotates in the opposite direction due to the elastic biasing force and contacts the stopper 604 on the base 600. The roller 611 is rotatably mounted on the tip of the arm 610. The arm 610 is attached to the connecting body 563 of the other car door 56. Note that the roller 611 is one form of the contact part of the present invention.

[0041] Thus, the operating member 603, which was in contact with the roller 611 when the car door 56 was fully closed, rotates from the first state to the second state when the roller 611 separates as the car door 56 opens, releasing the constraint caused by the contact. This rotation from the first state to the second state applies force to the first cam 601 and the second cam 602, generating rotational force and rotating the first cam 601 and the second cam 602 from the retracted position to the extended position, thereby activating the landing door engagement device 60. In the second state, both ends of the operating member 603 contact the first cam 601 and the second cam 602 (the second parts 601b and 602b), locking them and acting as a stopper to prevent the first cam 601 and the second cam 602 from returning to the retracted position.

[0042] Furthermore, the operating member 603 rotates from the second state to the first state when the car door 56 is fully closed and comes into contact with the roller 611, and by rotating from the second state to the first state, it releases its action on the first cam 601 and the second cam 602, returning the first cam 601 and the second cam 602 to their retracted positions, thereby deactivating the landing door engagement device 60.

[0043] Incidentally, as shown in Figure 5, the door hanger 561 of the car door 56 is provided with a recess 561a. The recess 561a is a recess that is recessed downward from the upper edge of the door hanger 561. For example, the recess 561a is rectangular in shape with left and right side edges. The width of the recess 561a in the left-right direction is somewhat larger than the width of the connecting body 563. Therefore, when the lower end of the connecting body 563 is placed in the recess 561a, a predetermined gap is formed in the left-right direction. A slide bar 561b is provided in the recess 561a in the left-right direction. The slide bar 561b penetrates the lower end of the connecting body 563. As a result, the connecting body 563 is configured to slide in the left-right direction relative to the door hanger 561, that is, in the opening and closing direction of the car door 56 as a whole, within a range in which the right edge abuts against the right edge of the recess 561a and the left edge abuts against the left edge of the recess 561a. For example, the slide length is 30-100 mm.

[0044] The configuration of elevator 1, which includes the landing door engagement device 60, is as described above. Next, the operation of the landing door engagement device 60 will be explained.

[0045] As shown in Figures 7(a1) and (a2), when the left and right car doors 56, 56 are fully closed, the operating member 603 is in contact with the roller 611 and is in the first state. Therefore, the first cam 601 (first portion 601a) and the second cam 602 (first portion 602a) rotate to a retracted position in which they cannot engage with the roller 384 of the door lock device 38 of the landing door 36 in the opening and closing direction of the car door 56 and the landing door 36. In this non-operating state of the landing door engagement device 60, the car 5 can travel.

[0046] Next, when the elevator car 5 lands on any floor, the door opening / closing device 58 is activated, the drive belt 584 moves in a circular motion in one direction, and the opening operation of the elevator car door 56 begins. However, as shown in Figures 7(b1) and (b2), within a predetermined range after the drive belt 584 starts its circular motion, only the connecting body 563 moves (slides) in the opening direction, while the door panel 560, door hanger 561, and landing door engagement device 60 remain in their fully closed position without moving. In contrast, the roller 611 is attached to the connecting body 563 of the other elevator car door 56 via the arm 610, and therefore moves in the opening direction (away from the operating member 603) as the connecting body 563 moves. As a result, the operating member 603 is released from the constraint imposed by the contact of the roller 611 and rotates from the first state to the second state. Then, when the operating member 603 rotates from the first state to the second state, the first cam 601 (first portion 601a) and the second cam 602 (first portion 602a) rotate at the second portions 601b and 602b due to the pressing force from both ends of the operating member 603, and rotate from the retracted position to the extended position. This series of operations is possible because the elastic force of the elastic material on the operating member 603 is greater than the elastic force of the elastic material on the first cam 601 and the second cam 602.

[0047] Then, as the first cam 601 (first portion 601a) rotates to the extended position, the roller 384 of the door locking device 38 of the landing door 36 engages with the first cam 601 (first portion 601a) and receives a pressing force. As a result, the locking member 382 is released.

[0048] Then, as shown in Figures 7(c1) and (c2), when the drive belt 584 continues to circulate in the operating state of the landing door engagement device 60, the entire car door 56 begins to open with the connecting body 563 in contact with and engaged with the door hanger 561. At this time, since the first cam 601 (first part 601a) is engaged with the roller 384 of the door lock device 38 of the landing door 36, the entire landing door 36 also begins to open simultaneously.

[0049] When the elevator car door 56 and landing door 36 move from a fully open state to a fully closed state, the elements of the landing door engagement device 60 operate in the reverse order of the above.

[0050] As described above, the landing door engagement device 60 according to this embodiment is constructed using a mechanical mechanism that eliminates concerns about electrical malfunctions. Therefore, the landing door engagement device 60 according to this embodiment can be made highly reliable in operation.

[0051] According to the landing door engagement device 60 of this embodiment, the first portions (engagement portions) 601a and 602a of the first cam 601 and the second cam 602 rotate to approach the roller 384 of the door lock device 38 of the landing door 36 from the diagonal front to the side, and advance toward the landing door 36, so there is no concern of collision with the roller 384. For this reason, with the landing door engagement device 60 of this embodiment, fine adjustment work of the first cam 601 and the second cam 602 can be eliminated.

[0052] In the landing door engaging device 60 according to this embodiment, the operating member 603 has a tip surface that acts as an acting surface for the first cam 601 and the second cam 602, and the distance from the axis of rotation of the operating member 603 decreases as it approaches the tip. When the operating member 603 rotates from the first state to the second state, it uses the elastic force of the elastic material, and since this elastic force is greater than the elastic force of the elastic material for the first cam 601 and the second cam 602, the operating member 603 can rotate from the first state to the second state. However, by having the above-mentioned tip surface, the load during rotation is reduced. For this reason, the landing door engaging device 60 according to this embodiment can be reliably activated when the car door 56 is opened.

[0053] According to the landing door engagement device 60 of this embodiment, the approach of the door lock device 38 of the landing door 36 to the roller 384 is performed by the 90-degree rotational movement of the first cam 601 and the second cam 602. Therefore, according to the landing door engagement device 60 of this embodiment, the clearance with the roller 384 can be made as small as possible, and consequently, the responsiveness of the landing door 36 to the car door 56 during the opening operation of the car door 56 and the landing door 36 can be improved (elimination of the delay in the start timing of the opening operation of the landing door 36 relative to the start timing of the opening operation of the car door 56).

[0054] In the landing door engagement device 60 according to this embodiment, the lateral distance between the first cam 601 and the second cam 602 is variable, being wider in the retracted position and narrower in the extended position. If the two cams were fixed in a wide position with no variable distance between them, the roller (engaged part) could move freely between the cams in the extended position, and in some cases, the roller could collide forcefully with the cam, causing problems such as abnormal noise and vibration. Also, if the two cams were fixed in a narrow position with no variable distance between them, if the cam unintentionally moved from the retracted position to the extended position while the elevator car was in motion, the cam could collide forcefully with the roller (engaged part), causing damage. However, the landing door engagement device 60 according to this embodiment solves both problems at once by employing rotational motion to make the lateral distance between the first cam 601 and the second cam 602 variable.

[0055] According to the landing door engagement device 60 of this embodiment, the connecting body 563 is configured to slide within a predetermined range in the opening and closing direction of the car door 56 across the entire car door 56, and the roller 611, which acts as a contact part, is provided on the connecting body 563. As a result, after the landing door engagement device 60 is activated, the door panel 560, which is the main part of the car door 56, begins to open. Therefore, according to the landing door engagement device 60 of this embodiment, it is possible to further improve the responsiveness of the landing door 36 to the car door 56 during the opening operation of the car door 56 and the landing door 36 (eliminating the delay in the start timing of the opening operation of the landing door 36 relative to the start timing of the opening operation of the car door 56).

[0056] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0057] In the above embodiment, the first cam 601 and the second cam 602 are made of angle material, and the second parts 601b and 602b, which are secondary components, are provided along the entire length of the side edges of the first parts 601a and 602a, which are the main components of the cam. However, the present invention is not limited thereto. The second part may be provided only on a part of the side edge of the first part, including at least the part that is acted upon by the operating member. Alternatively, the second part is not essential if the first cam and the second cam are acted upon by the operating member in different ways. Furthermore, the second part may intersect the first part at an angle that is not perpendicular.

[0058] In the above embodiment, the surfaces of the second portions 601b and 602b of the first cam 601 and the second cam 602, which are in sliding contact with both ends of the operating member 603, are metal surfaces. They do not have particularly high frictional resistance. However, in order to obtain high sliding properties (and wear resistance), measures such as attaching a flat roller, applying a low-friction sheet, or applying a coating may be taken to these surfaces.

[0059] In the above embodiment, the support pieces 600b to 600e of the base 600 are used as stoppers to hold the first cam 601 and the second cam 602 in the retracted position. However, the present invention is not limited thereto. For example, the operating part may be made to function as a stopper.

[0060] In the above embodiment, one operating member 603 is provided at the midpoint between the first cam 601 and the second cam 602 in the height direction. However, the present invention is not limited thereto. The operating part may be provided at two or more locations at different height positions.

[0061] In the above embodiment, the door devices 55 and 35 are of the center-opening type (2CO) with one door on each side. However, the present invention is not limited to this. Needless to say, the present invention can also be applied to side-opening type (2S) door devices with two doors, center-opening type (4CO) door devices with two doors on each side, and side-opening type (1S) door devices with one door. In the case of side-opening type door devices, the contact portion is not attached to the car door (movable part), but rather to the peripheral part of the opening on the front surface of the car (fixed part), either directly or indirectly via a bracket or the like. Alternatively, even in the case of a center-opening type, the contact portion may be provided on the fixed part.

[0062] In the above embodiment, the first cam 601 and the second cam 602 are made to rotate to improve the tracking ability of the landing door 36 to the car door 56 during the opening operation of the car door 56 and the landing door 36. In addition, a movable structure for the connecting body 563 is adopted to further improve tracking ability. However, since the effect of improving tracking ability can be sufficiently observed even with the first stage of the measure, it is not essential to adopt a movable structure for the connecting body in the present invention. In this regard, as with conventional car door devices, the connecting body may be fixed to the door hanger.

[0063] In this invention, terms that specify shapes, parts, states, or directions, such as "rectangular," "semicircular," "semielliptical," "triangular," "trapezoidal," "rectangular," "center," "outside," "same," "parallel," "vertical," "horizontal," "orthogonal," "up and down," "front and back," and "left and right," include not only the terms themselves but also the concept of "abbreviation" meaning something similar or alike. Furthermore, "upward" and "downward" also include directions that are inclined with respect to the vertical direction. [Explanation of symbols]

[0064] 1...Elevator, 2...Hoistway, 2A...Inner wall, 30...Landing, 31...Three-sided frame, 35...Landing door device, 36...Landing door, 360...Door panel, 361...Door hanger, 362...Roller, 37...Door support structure, 370...Door rail, 371...Sill, 38...Door lock device, 380...Locking member, 380a...Locking part, 381...Switch, 382...Locking member, 383...Conductor part, 384...Roller (engaged part), 5...Car, 5a...Opening, 55...Car door device, 56...Car door, 560...Door panel, 561...Door hanger, 561a...Recess, 561b...Slide bar, 562...Roller, 563...Connecting body 57...Door support structure, 570...Door rail, 571...Sill, 58...Door opening and closing device, 580...Drive motor, 581...Reduction pulley, 582...Pulley, 583...Reduction belt, 584...Drive belt (moving body), 60...Landing door engagement device, 600...Base, 600a...Main body, 600b~600e...Support piece (also serves as stopper), 601...First cam, 601a...First part (engaging part), 601b...Second part, 602...Second cam, 602a...First part, 602b...Second part, 603...Operating member (operating part), 603a...Main body, 603b...Input part, 604...Stopper, 610...Arm, 611...Roller (contact part)

Claims

1. An elevator landing door engagement device provided in the car door device, which engages with the engaged portion of the landing door when the car door is opened, thereby opening the landing door in conjunction with the opening of the car door, A pair of cams, each vertically elongated and spaced apart with a predetermined distance between them in the left-right direction, each rotatable about the vertical direction at the point on the other cam side, and each cam rotatably moving between a retracted position, where it is spaced away from the landing door and cannot engage with the engaging part, and an extended position, where it is close to the landing door and can engage with the engaging part. The device includes a pair of cams that are rotatable about the front-to-back direction, and when the car door is fully closed, the contact point is in contact with the contact point, but as the car door opens, the constraint caused by the contact is released, causing it to rotate from a first state to a second state. The device also includes an operating part that applies force to the pair of cams as it rotates them from a retracted position to an extended position. Elevator landing door engagement device.

2. A pair of cams, Each comprises a vertically elongated strip-shaped first portion and a second portion that protrudes in a direction intersecting the other cam-side portion of the first portion. The pair of second parts rotate due to the force generated by the rotation of the operating part located between them, and rotate from the retracted position to the extended position. The elevator landing door engagement device according to claim 1.

3. A cam is an angle material, where one of two perpendicular parts of the angle material is the first part and the other part is the second part. The elevator landing door engagement device according to claim 2.

4. The operating part has a tip surface where the distance to the axis of rotation of the operating part decreases as it approaches the tip. The elevator landing door engagement device according to claim 1.

5. When the cage door is of the center-opening type, the left and right cage doors each have a connecting body for connecting the cage door to the moving part of the door opening and closing device. The connecting body is configured to be movable within a predetermined range in the opening and closing direction of the car door throughout the entire car door. A pair of cams and operating parts are attached to one of the car doors. The contact portion is attached to the connecting body of the other car door via an arm. The elevator landing door engagement device according to claim 1.

6. The elevator is equipped with an elevator landing door engaging device as described in any one of claims 1 to 5. Elevator.

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