Elevator landing door engagement device and elevator

Abstract

To provide an elevator landing door engaging device having high operational reliability and not requiring fine adjustment work. [Solution] The device includes a pair of cams 601, 602 that are rotatable between a retracted position where they are away from the landing door 36 and cannot engage with the engaged portion 384, and an advanced position where they are close to the landing door 36 and can engage with the engaged portion 384, and an operating unit 603 that applies a force to the pair of cams 601, 602, thereby rotating the pair of cams 601, 602 from the retracted position to the advanced position by rotating the pair of cams 601, 602 from the retracted position to the advanced position, as the part of the cams that is in contact with an abutment portion 611 when the car door 56 is fully closed is released from the restraint caused by the abutment as the car door 56 is opened.

Description

[Technical Field]

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

[0002] One known form of the landing door engaging device is a structure in which 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 rollers (engaged portions) of a door lock device of the landing door to transmit a driving force for an opening operation to the landing door.

[0003] In this type of landing door engagement device, the movable cam is spaced farther apart to ensure sufficient clearance so that it does not come into contact with the roller of the door locking device of the landing door when the car passes through a passing floor. However, if the movable cam shifts to a position where it interferes with the roller of the door locking device of the landing door or other landing equipment due to, for example, an unbalanced load causing the car to tilt or an impact to the car door causing deformation of the car door, the movable cam will interfere with these equipment while the car is traveling, causing damage to the equipment.

[0004] To solve this problem, a landing door engagement device has been proposed that retracts the movable cam toward the car when the car is traveling and advances it toward the landing door when activated. For example, the landing door engagement device described in Patent Document 1 uses a solenoid to extend and retract the movable cam, while the landing door engagement 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] Japanese Patent Application Laid-Open No. 2007-182314 [Patent Document 2] Japanese Patent Application Laid-Open No. 2000-118923 [Patent Document 3] Japanese Patent Application Publication No. 1-267289 [Patent Document 4] Japanese Utility Model Application Publication No. 7-028170 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the landing door engagement device described in Patent Document 1 uses a solenoid, which is an electrical element, and therefore there is a concern that an electrical malfunction may occur, and it cannot be said that the reliability of operation is necessarily high. The landing door engagement devices described in Patent Documents 2 to 4 are configured using a mechanical mechanism, and therefore, although the reliability of operation is high, the adjustment work to prevent the movable cam from colliding with the roller when it advances is complicated.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevator landing door engaging device and an 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 comprises: An elevator landing door engaging device that is provided in a car door device and that engages with an engaged portion of a landing door when the car door is opened, thereby opening the landing door in conjunction with the opening operation of the car door, a pair of cams, each of which is vertically long and spaced apart in the left-right direction at a predetermined interval, each of which is rotatable around the up-down direction at a location on the other cam side, and each of which is rotatable between a retracted position where the cam is spaced apart from the landing door and cannot engage with the engaged portion, and an advanced position where the cam is close to the landing door and can engage with the engaged portion; and an operating unit that is rotatable around the front-to-rear direction between the pair of cams, and that rotates from a first state to a second state when the portion that is in contact with the contact portion when the car door is fully closed is released from the restraint caused by the contact as the car door opens, and that rotates from the first state to the second state by applying a force to the pair of cams to rotate the pair of cams from the retracted position to the advanced position. An elevator hall door engagement device.

[0009] As one aspect of the elevator landing door engagement device according to the present invention, A pair of cams Each of the first and second portions has a first portion in the shape of a vertically long strip and a second portion protruding in a direction intersecting the first portion from a position on the other cam side of the first portion, The pair of second parts rotates in response to the force generated by the rotation of the operating part located between them, and rotates from the retracted position to the advanced position. The above configuration can be adopted.

[0010] As one aspect of the elevator landing door engagement device according to the present invention, The cam is an angled piece, and one of the two parts of the angled piece that intersect at right angles is the first part, and the other part is the second part. The above configuration can be adopted.

[0011] As one aspect of the elevator landing door engagement device according to the present invention, The operation unit has a distal end surface whose distance to the rotation axis of the operation unit decreases toward the distal end. The above configuration can be adopted.

[0012] As one aspect of the elevator landing door engagement device according to the present invention, When the car doors are of a center-opening type, the left and right car doors each include a connector for connecting the car door to a movable body of the door opening and closing device; the connecting body is configured to be movable within a predetermined range in the opening and closing operation direction of the car door as a whole, A pair of cams and an operating unit are attached to one of the car doors, The abutment portion is attached to the connector of the other car door via an arm. The above configuration can be adopted.

[0013] The elevator according to the present invention comprises: The elevator is provided with any one of the elevator landing door engagement devices described above. It's an elevator. [Effects of the Invention]

[0014] According to the present invention, the device is configured using a mechanical mechanism that is free from the risk of electrical malfunctions. Therefore, according to the present invention, high operational reliability can be obtained. Furthermore, according to the present invention, there is no risk of the pair of cams colliding with the engaged portion of the landing door when advancing toward the landing door. Therefore, according to the present invention, fine adjustment work can be eliminated. [Brief explanation 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 with the car doors fully closed as seen from the landing side, and Fig. 2(b) is a front view of the car with the car doors 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 a locked state as seen from inside the elevator shaft, and Fig. 4(b) is a front view of the door lock device in an unlocked state. [Figure 5] Fig. 5(a) is a front view of the landing door engagement device in an inoperative state as the car door is fully closed, as viewed from the landing side, and Fig. 5(b) is a front view of the landing door engagement device in an operative state as the car door starts to open. [Figure 6]Fig. 6(a) is a perspective view of a schematic configuration of a landing door engaging device in an inoperative state, and Fig. 6(b) is a perspective view of a schematic configuration of a landing door engaging device in an operative state. [Figure 7] FIG. 7 is an explanatory diagram of the operation of the landing door engaging device. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of an elevator equipped with a hall door engaging device according to the present invention will be described.

[0017] As shown in Figure 1, elevator 1 includes hoistway 2 and car 5. Hoistway 2 extends vertically in a building with multiple floors. Car 5 moves up and down in hoistway 2 by being driven by a drive device, and stops at a designated floor by stopping the drive device.

[0018] The car 5 is equipped with a car door device 55. The car door device 55 is equipped with a car door 56, a door support structure 57, and a door opening and closing device 58. The car door 56 moves left and right (horizontally left and right, the same applies below) to open and close an opening (car entrance / exit) on the front of the car 5, allowing passengers to get on and off. The door support structure 57 is a structure that supports the car door 56 while enabling the car door 56 to open and close. The door opening and closing device 58 is a device for opening and closing the car door 56.

[0019] In contrast, the landing 30 on each floor includes a jamb 31 and a landing door device 35. The jamb 31 is formed on a wall surface, and the interior of the frame forms an opening of a size corresponding to the opening of the car 5. The landing door device 35 includes a landing door 36 and a door support structure 37. The landing door 36 moves left and right to open and close the opening (landing entrance / exit) in the jamb 31, allowing passengers to get on and off. The landing door 36 is normally kept closed by an elastic force, and is opened against the elastic force in response to the opening operation of the car door 56 of the car 5 stopped at the floor, and is closed by the elastic force in response to the closing operation of the car door 56. The door support structure 37 is a structure that supports the landing door 36 while enabling the opening and closing operation of the landing door 36.

[0020] As shown in FIGS. 2 and 3 , the car door 56 includes a door panel 560, a door hanger 561, and a connector 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 attached integrally to the upper end of the door panel 560. The door hanger 561 includes a pair of rollers 562, 562. The pair of rollers 562, 562 are arranged at the upper end of the door hanger 561 with a gap between them in the left-right direction. The connector 563 is attached to the upper end of the door hanger 561, between the pair of rollers 562, 562. The connector 563 is a device that connects the car door 56 (the door hanger 561 of the car door 56) to a drive belt 584 (described later) of the door opening and closing device 58.

[0021] The door support structure 57 includes a door rail 570 and a threshold 571. The door rail 570 is formed in a strip shape and is provided in the left-right direction on the upper front surface 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 hung from the door rail 570 in a state in which it can slide in the left-right direction along the door rail 570. The door rail 570 is a structure that supports the upper part of the car door 56 while allowing the car door 56 to open and close. On the other hand, the threshold 571 is provided in the left-right direction on the lower front surface of the car 5 along the lower edge of the opening 5a of the car 5 and so that both ends are wider in the left-right direction than the lower edge of the opening 5a. The threshold 571 is a structure that supports the lower part of the car door 56 while allowing the car door 56 to open and close.

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

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

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

[0025] The car door device 55 includes a landing door engaging device 60. The landing door engaging device 60 is a device that engages with an engaged portion of the landing door 36 when the car door 56 performs an opening operation, thereby causing the landing door 36 to perform an opening operation in conjunction with the opening operation of the car door 56. The details of the landing door engaging device 60 will be described later.

[0026] 4, the landing door device 35 includes a door locking device 38. The door locking device 38 includes, as components on the landing entrance / exit side, a locked portion 380a of a locked member 380 and a switch 381 of a door closing detection unit, and includes, as components on the landing door 36 side, a locking member 382 and a conductor portion 383.

[0027] The locked member 380 and the switch 381 are attached directly or indirectly via a bracket or the like to the inner wall surface 2A of the elevator shaft 2 around the landing entrance. The locking member 382 is attached to the door hanger 361 so as to be able to swing, and when the landing door 36 is fully closed, the locking member 382 swings so that its tip lowers vertically and engages with the locked portion 380a (locked state). The conductor portion 383 is attached to the tip of the locking member 382, and when the locking member 382 is in the locked state, the conductor portion 383 comes into contact with and acts on a pair of terminals (not shown) of the switch 381, turning the switch 381 ON (or OFF). The control unit of the elevator 1 determines that the landing door 36 is fully closed based on the ON signal (or OFF signal) of the switch 381.

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

[0029] 5 and 6, the landing door engagement device 60 is configured to include a base 600, a first cam 601, a second cam 602, and an operating member 603. The base 600 is attached to a door hanger 561 of the car door 56. The first cam 601 and the second cam 602 are supported on the base 600 so as to be rotatable (swingable) around an axis in the vertical direction. The operating member 603 is supported on the base 600 so as to be rotatable (swingable) around an axis in a direction perpendicular to the vertical plane of the car door 56 (front-rear direction (horizontal direction between front and rear, the same applies hereinafter)). The operating member 603 is one form of the operating unit of the present invention.

[0030] The base 600 is a metal member and includes a main body 600a and support pieces 600b to 600e. The main body 600a is shaped like a vertically long plate, and is attached at its center to a door hanger 561 of the car door 56. The upper first support piece 600b is a piece that protrudes forward from a portion of 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 a portion of 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 a portion of 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 a portion of 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 tip ends. The upper second support piece 600d and the lower second support piece 600e rotatably support the second cam 602 at their tip ends. As an example, the base 600 (main body 600a and support pieces 600b to 600e) is formed from a single plate-shaped metal material through cutting and bending processes.

[0031] The first cam 601 and the second cam 602 are metal members that are elongated in the vertical direction and are arranged parallel to each other with a predetermined gap between them in the left-right direction. The first cam 601 and the second cam 602 are long angle bars that have strip-shaped first portions 601a, 602a and second portions 601b, 602b that intersect at right angles. The widths of the first portions 601a, 602a and the second portions 601b, 602b are the same. Alternatively, one of the widths may be larger than the other.

[0032] The first cam 601 and the second cam 602 are disposed symmetrically about the vertical center line between the first cam 601 and the second cam 602. As a result, the first portions 601a and 602a are positioned in an axisymmetrical relationship, and the second portions 601b and 602b are positioned in an axisymmetrical relationship.

[0033] The first cam 601 and the second cam 602 are rotatably supported on the tip ends of the support pieces 600b to 600e of the base 600 at the intersections (or nearby locations) of the first portions 601a, 602a and the second portions 601b, 602b, and are provided so as to be rotatable about the vertical direction. More specifically, the first cam 601 and the second cam 602 are in a retracted position where the first portions 601a, 602a are aligned on a plane parallel to the vertical plane of the car door 56, and the second portions 601b, 602b are parallel and opposed to each other behind the first portions 601a, 602a in the left-right direction, so that the first portions 601a, 602a are separated from the landing door 36 and cannot engage with the roller 384 of the door lock device 38 of the landing door 36 in the left-right direction. (FIGS. 5(a) and 6(a)), and ii) an advanced position (FIGS. 5(b) and 6(b)) in which the first portions 601a and 602a are parallel to each other in front of the second portions 601b and 602b and face each other in the left-right direction, and the second portions 601b and 602b are aligned on a plane parallel to the vertical plane of the car door 56, so that the first portions 601a and 602a 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 rotate 90 degrees in opposite directions, one clockwise and the other counterclockwise, to simultaneously switch between the retracted position and the advanced position. 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, and when the landing door engagement device 60 is in operation, the first cam 601 and the second cam 602 are rotated from the retracted position to the advanced position due to the pressing force of the operation member 603 (a pressing force that resists the elastic force of the elastic material). Although not shown, the elastic material is a tension spring or a torsion spring provided between the base 600 and the first cam 601 and the second cam 602, and applies an elastic force to the first cam 601 and the second cam 602 so that they rotate from the advanced position to the retracted position. However, when the first cam 601 and the second cam 602 are in their retracted positions, the support pieces 600b to 600e of the base 600 engage the first cam 601 and the second cam 602 (their second parts 601b, 602b), and act as stoppers to restrict further rotation of the first cam 601 and the second cam 602.

[0035] The operating member 603 includes a main body 603a. The main body 603a is rotatably supported at its center on the main body 600a of the base 600, at a location between the first cam 601 and the second cam 602, and is provided to be rotatable about a direction perpendicular to the vertical plane of the car door 56. The main body 603a has a rectangular parallelepiped shape (block-like, prismatic) that is elongated in a direction (first direction) parallel to the vertical plane of the car door 56. The length of the main body 603a in the first direction is a length that allows the main body 603a to straddle and 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 car 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 around this axis. The tip end surface is a surface that becomes closer to the rotation axis as it approaches the tip, and the width of the main body 603a becomes narrower as it approaches the tip. As one example, the tip end surface is an arcuate surface (curved surface) with a semicircular or semi-elliptical cross section. Alternatively, as another example, the tip end surface is a surface with a triangular or trapezoidal cross section.

[0037] The operation member 603 further includes an input portion 603b, which extends from one end of the main body portion 603a.

[0038] The operating member 603 is rotatable between a first state (FIGS. 5(a) and 6(a)) in which the main body portion 603a is upright and positioned between the first cam 601 and the second cam 602, and a second state (FIGS. 5(b) and 6(b)) in which the inclination of the main body portion 603a is gentler, the distance between both ends in the left-right direction is longer, and both ends overlap the first cam 601 and the second cam 602 when viewed from the front-to-back direction.

[0039] The operating member 603 receives an elastic force from an elastic material. Although not shown, the elastic material is a tension spring or a torsion spring provided between the base 600 and the operating member 603, and applies an elastic force to the operating member 603 so that the operating member 603 rotates from the first state to the second state. However, when the operating member 603 is in the second state, a stopper 604 provided on the base 600 locks the operating member 603 (main body 603a thereof), restricting further rotation of the operating member 603.

[0040] The first state is a state in which the operating member 603 rotates against the elastic force, and the input portion 603b abuts against the roller 611 when the car door 56 is fully closed. The second state is a state in which the operating member 603 rotates in the opposite direction due to the elastic force, and abuts against a stopper 604 on the base 600. The roller 611 is rotatably attached to the tip of the arm 610. The arm 610 is attached to the connector 563 of the other car door 56. The roller 611 is one form of the abutment portion of the present invention.

[0041] In this way, the operating member 603 is a means for rotating from the first state to the second state as a result of the roller 611 moving away from the roller 611 when the car door 56 is in a fully closed state and being released from the restraint caused by the contact as the car door 56 opens, and by rotating from the first state to the second state, a force is applied to the first cam 601 and the second cam 602 to generate a rotational force, which causes the first cam 601 and the second cam 602 to rotate and move from the retracted position to the advanced position, thereby activating the landing door engagement device 60. In the second state, both end portions of the operating member 603 come into contact with and lock the first cam 601 and the second cam 602 (second portions 601b, 602b of the first cam 601 and the second cam 602), thereby restricting 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 in the fully closed state and comes into contact with the roller 611, and also rotates from the second state to the first state, thereby releasing the action on the first cam 601 and the second cam 602 and returning the first cam 601 and the second cam 602 to the retracted positions, thereby bringing the landing door engaging device 60 into a non-operating state.

[0043] As shown in FIG. 5 , the door hanger 561 of the car door 56 includes a recess 561a. The recess 561a is recessed downward from the upper edge of the door hanger 561. As an example, the recess 561a has a rectangular shape having left and right side edges. The width of the recess 561a in the left-right direction is somewhat larger than the width of the connector 563. Therefore, when the lower end of the connector 563 is disposed 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 connector 563. As a result, the connector 563 is configured to be slidable in the left-right direction relative to the door hanger 561, i.e., in the opening / closing operation direction of the car door 56, 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. As an example, the slide length is 30 to 100 mm.

[0044] The above is the configuration of the elevator 1 equipped with the landing door engaging device 60. Next, the operation of the landing door engaging device 60 will be described.

[0045] 7(a1) and 7(a2), in a state in which the left and right car doors 56, 56 are fully closed, the operating member 603 abuts against 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 retracted positions where they cannot engage with the roller 384 of the door lock device 38 of the landing door 36 in the opening / closing operation direction of the car door 56 and the landing door 36. In this inoperative state of the landing door engaging device 60, the car 5 is able to travel.

[0046] Next, when the car 5 lands on any floor, the door opening / closing device 58 is driven, the drive belt 584 moves circulatingly in one direction, and the opening operation of the car door 56 begins. However, as shown in FIGS. 7(b1) and (b2), within a predetermined range after the drive belt 584 starts its circulating movement, first, only the connector 563 moves (slides) in the opening operation direction, while the door panel 560, the door hanger 561, and the landing door engaging device 60 do not move and remain in the fully closed position. In contrast, the roller 611 is attached to the connector 563 of the other car door 56 via the arm 610, and therefore moves in the opening operation direction (direction away from the operating member 603) as the connector 563 moves. As a result, the operating member 603 is released from the constraint caused by the contact of the roller 611, and rotates from the first state to the second state. 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 due to the pressing force applied by both ends of the operating member 603 at the second portions 601b, 602b, and rotate from the retracted position to the advanced position. This series of operations is possible because the elastic force of the elastic material acting on the operating member 603 is greater than (is larger than) the elastic force of the elastic material acting on the first cam 601 and the second cam 602.

[0047] When the first cam 601 (first portion 601a) rotates to the advanced position, the roller 384 of the door lock 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 lock member 382 enters an unlocked state.

[0048] 7(c1) and 7(c2), when the drive belt 584 continues to circulate in this operating state of the landing door engagement device 60, the entire car door 56 starts to open with the connecting body 563 abutting and engaging with the door hanger 561. At this time, since the first cam 601 (first portion 601a) is engaged with the roller 384 of the door lock device 38 of the landing door 36, the entire landing door 36 also starts to open at the same time.

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

[0050] As described above, the landing door engagement device 60 according to this embodiment is configured using a mechanical mechanism that is free from the risk of electrical malfunctions. Therefore, the landing door engagement device 60 according to this embodiment can achieve high operational reliability.

[0051] According to the landing door engagement device 60 of this embodiment, the first portions (engagement portions) 601a, 602a of the first cam 601 and the second cam 602 perform rotational motion so as to approach the roller 384 of the door lock device 38 of the landing door 36 from diagonally forward toward the side, and advance toward the landing door 36, and there is no concern of collision with the roller 384. Therefore, according to the landing door engagement device 60 of this embodiment, it is possible to eliminate the need for fine adjustment work of the first cam 601 and the second cam 602.

[0052] According to the landing door engagement device 60 of this embodiment, the operating member 603 has a tip end surface, which serves as an acting surface on the first cam 601 and the second cam 602, and the distance from the rotation axis of the operating member 603 decreases toward 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 this elastic force is greater than the elastic force of the elastic material acting on the first cam 601 and the second cam 602, which enables the operating member 603 to rotate from the first state to the second state, and the provision of the tip end surface reduces the load during rotation. Therefore, according to the landing door engagement device 60 of this embodiment, the device can be reliably put into an actuated state when the car door 56 is opened.

[0053] According to the landing door engagement device 60 of the present embodiment, the approach of the landing door 36 to the roller 384 of the door lock device 38 is performed by a 90-degree rotational movement of the first cam 601 and the second cam 602. For this reason, according to the landing door engagement device 60 of the present embodiment, it is possible to make the clearance with the roller 384 as small as possible, and in turn, it is possible to enhance the followability of the landing door 36 with respect to the car door 56 during the opening operation of the car door 56 and the landing door 36 (elimination of delay in the start timing of the opening operation of the landing door 36 with respect to the start timing of the opening operation of the car door 56).

[0054] According to the landing door engagement device 60 of this embodiment, the left-right distance between the first cam 601 and the second cam 602 is variable, being wide at the retracted position and narrow at the advanced position. If the two cams were fixed in a state where the distance between them was not variable and always wide, the rollers (engaged portions) would be able to move freely between the cams at the advanced position, which could result in the rollers colliding forcefully with the cams and generating abnormal noise and vibration. Furthermore, if the two cams were fixed in a state where the distance between them was not variable and always narrow, the cams could collide forcefully with the rollers (engaged portions) and be damaged if they were to unintentionally move from the retracted position to the advanced position while the car was traveling. However, according to the landing door engagement device 60 of this embodiment, by employing a rotational motion to vary the left-right distance between the first cam 601 and the second cam 602, both problems can be solved at once.

[0055] According to the landing door engagement device 60 of the present embodiment, the connecting body 563 is configured to be slidable over the entire car door 56 within a predetermined range in the opening / closing operation direction of the car door 56, and the roller 611 serving as the abutment portion is provided on the connecting body 563. As a result, after the landing door engagement device 60 is brought into an activated state, the door panel 560, which is the main body of the car door 56 as a door, starts an opening operation. For this reason, according to the landing door engagement device 60 of the present embodiment, it is possible to further improve the followability of the landing door 36 with respect to the car door 56 during the opening operations of the car door 56 and the landing door 36 (elimination of delay in the start timing of the opening operation of the landing door 36 with respect to the start timing of the opening operation of the car door 56).

[0056] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0057] In the above embodiment, the first cam 601 and the second cam 602 are angle bars, and the first portions 601a and 602a are the main components of the cams, while the second portions 601b and 602b are secondary components and are provided along the entire length of the side edges of the first portions 601a and 602a. However, the present invention is not limited to this. The second portions may be provided only on a portion of the side edges of the first portions, including at least the portion that is acted upon by the operating member. Alternatively, if the first cam and the second cam are acted upon by the operating member in different ways, the second portion is not required. Furthermore, the second portion may intersect with the first portion at an angle that is not perpendicular to the first portion.

[0058] In the above embodiment, the surfaces of the second portions 601b and 602b of the first cam 601 and the second cam 602, with which both ends of the operating member 603 slide, are made of metal. This does not have particularly high friction resistance. However, to achieve high sliding properties (and wear resistance), the surfaces may be provided with flat rollers, low-friction sheets, coatings, or other measures.

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

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

[0061] In the above embodiment, the door devices 55, 35 are of a center-opening type (2CO) with one door on each side. However, the present invention is not limited to this. It goes without saying that the present invention can also be applied to a side-opening type (2S) door device with two doors, a center-opening type (4CO) door device with two doors on each side, and a side-opening type (1S) door device with one door. In the case of a side-opening type door device, the abutment portion is not provided on the car door (movable portion), but is provided on the periphery of the opening (fixed portion) on the front surface of the car, either directly or indirectly via a bracket or the like. Alternatively, even in the case of a center-opening type, the abutment portion may be provided on the fixed portion.

[0062] In the above embodiment, a two-stage measure is taken in which the first cam 601 and the second cam 602 are made to rotate, thereby improving the tracking ability of the landing door 36 relative to the car door 56 when the car door 56 and the landing door 36 are opening, and in addition, a movable structure for the connecting body 563 is adopted to further improve the tracking ability. However, since the first-stage measure is sufficient to improve the tracking ability, it is not essential in the present invention to adopt a movable structure for the connecting body. In this regard, the connecting body may be fixed to a door hanger, as in conventional car door devices.

[0063] In the present invention, terms specifying a shape, part, state, or direction, such as "rectangular," "semicircular," "semi-elliptical," "triangular," "trapezoid," "rectangular," "center," "central," "end," "same," "parallel," "vertical," "horizontal," "orthogonal," "up and down," "front and back," and "left and right," include not only the term itself, but also the concept of "approximately" meaning something close to or similar to it. Furthermore, "upper" and "lower" also include directions inclined relative to the vertical direction. [Explanation of symbols]

[0064] 1... elevator, 2... hoistway, 2A... interior wall, 30... landing, 31... jamb, 35... landing door device, 36... landing door, 360... door panel, 361... door hanger, 362... roller, 37... door support structure, 370... door rail, 371... threshold, 38... door lock device, 380... locked member, 380a... locked portion, 381... switch, 382... locking member, 383... conductor portion, 384... roller (engaged portion), 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 engaging device, 600...base, 600a...main body, 600b to 600e...support piece (also stopper), 601...first cam, 601a...first part (engagement part), 601b...second part, 602...second cam, 602a...first part, 602b...second part, 603...operation member (operation part), 603a...main body, 603b...input part, 604...stopper, 610...arm, 611...roller (contact part)

Claims

1. An elevator landing door engaging device that is provided in a car door device and that engages with an engaged portion of a landing door when the car door is opened, thereby opening the landing door in conjunction with the opening operation of the car door, a pair of cams, each of which is vertically long and spaced apart in the left-right direction at a predetermined interval, each of which is rotatable about the up-down direction at a location on the other cam side, and each of which is rotatable between a retracted position where the cam is spaced apart from the landing door and cannot engage with the engaged portion, and an advanced position where the cam is close to the landing door and can engage with the engaged portion; an operating unit that is rotatable around the front-to-rear direction between the pair of cams, and that rotates from a first state to a second state when a portion that is in contact with the abutment portion when the car door is fully closed is released from the restraint caused by the abutment as the car door is opened, and that rotates from the first state to the second state by applying a force to the pair of cams to rotate and move the pair of cams from the retracted position to the advanced position; Elevator landing door engagement device.

2. A pair of cams Each of the first and second portions includes a first portion having a longitudinal strip shape and a second portion protruding from a position on the other cam side of the first portion in a direction intersecting the first portion, The pair of second portions rotates by receiving the force generated by the rotation of the operating portion located between them, and rotates from the retracted position to the advanced position.

2. The elevator landing door engagement device according to claim 1.

3. The cam is an angled piece, and one of the two parts of the angled piece that intersect at right angles is the first part, and the other part is the second part.

3. The elevator landing door engagement device according to claim 2.

4. The operation unit has a distal end surface whose distance to the rotation axis of the operation unit decreases toward the distal end.

2. The elevator landing door engagement device according to claim 1.

5. When the car doors are of a center-opening type, the left and right car doors each include a connector for connecting the car door to a movable body of the door opening and closing device; the connecting body is configured to be movable within a predetermined range in the opening and closing operation direction of the car door as a whole, The pair of cams and the operating unit are attached to one of the car doors, The abutment portion is attached to the connector of the other car door via an arm.

2. The elevator landing door engagement device according to claim 1.

6. The elevator is provided with the landing door engaging device according to any one of claims 1 to 5. Elevator.

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