Landing door and elevator

Abstract

Provided are a landing door and an elevator capable of reducing the number of components of a locking mechanism capable of two-stage locking. The landing door has a locking mechanism that locks a door body in a door closed state in which a door body is closed, and in a door partially open state in which the door body is opened from the door closed state to a predetermined distance. A hook member of the locking mechanism has a first hook and a second hook, and rotates about a rotation axis perpendicular to a sliding direction and a vertical direction of the door body. A hook receiving part engages with the first hook in the door closed state and engages with the second hook in the door partially open state. A biasing member biases the hook member in a posture in which the first hook and the second hook face the hook receiving part in the sliding direction of the door body. A first unlocking part is connected to the hook member, and can be operated to rotate the hook member in the door closed state. A second unlocking part is connected to the hook member, and can be operated to rotate the hook member in the door partially open state.

Description

Landing doors and elevators

[0001] The present invention relates to a landing door and an elevator equipped with a locking mechanism.

[0002] Conventionally, elevator doors on the landing side are equipped with a locking mechanism. This prevents the landing door from being manually opened from the landing side unless it is unlocked. As a result, the landing door can prevent passengers from falling into the elevator shaft.

[0003] When performing elevator maintenance or inspection, or when a person is trapped inside the car, a worker unlocks the locking mechanism from the hall side and manually opens the hall door. During elevator maintenance work, the worker may open the hall door and enter the car.

[0004] Patent Document 1 discloses an elevator equipped with a first door locking device and a second door locking device arranged vertically. The first door locking device locks the landing door in a closed state. The second door locking device limits the opening width of the landing door to a second opening width that is smaller than the first opening width in a fully open state. The elevator disclosed in Patent Document 1 limits the opening width of the landing door to the second opening width, making it possible to confirm that the elevator car is located at the boarding floor.

[0005] Japanese Patent Application Laid-Open No. 2022-24571

[0006] However, when the two door locking devices disclosed in Patent Document 1 are used on various types of landing doors, it is difficult to secure the space for installing the two door locking devices. Furthermore, providing two door locking devices complicates the assembly work of the landing doors and hinders cost reduction.

[0007] In consideration of the above problems, the present invention aims to provide a landing door and an elevator that can reduce the number of parts in a locking mechanism that is capable of two-stage locking.

[0008] To solve the above problems and achieve the object, a landing door embodying one aspect of the present invention includes a door body that slides horizontally to open and close a doorway communicating with an elevator shaft, and a locking mechanism. The locking mechanism locks the door body in a closed state in which the door body is closed, and in a partially open state in which the door body is opened a predetermined distance from the closed state. The locking mechanism includes a hook member, a hook receiving portion, a biasing member, a first unlocking portion, and a second unlocking portion. The hook member has a first hook and a second hook and rotates around a rotation axis that is perpendicular to the sliding direction and the up-down direction of the door body. The hook receiving portion engages with the first hook in the closed state and engages with the second hook in the partially open state. The biasing member biases the hook member in a position in which the first hook and the second hook face the hook receiving portion in the sliding direction of the door body. The first unlocking portion is connected to the hook member and is rotatable in the closed state. The elevator according to one aspect of the present invention includes a car that moves up and down within a hoistway, and the landing door.

[0009] According to the landing door and elevator having the above configuration, the number of parts of the locking mechanism capable of two-stage locking can be reduced.

[0010] FIG. 1 is a schematic configuration diagram showing an elevator according to one embodiment; FIG. 2 is a side view showing a state in which the elevator car according to one embodiment has stopped at an arbitrary floor; FIG. 3 is a view showing a car door of an elevator according to one embodiment; FIG. 4 is a front view of a landing door according to one embodiment as seen from the landing car side; FIG. 5 is a perspective view showing a landing locking mechanism according to one embodiment; FIG. 6 is a perspective view showing a state in which a hook receiving portion is removed from the landing locking mechanism according to one embodiment; FIG. 7 is a front view showing a landing locking mechanism according to one embodiment; FIG. 8 is a front view showing a state in which a car-side locking mechanism of an elevator according to one embodiment is unlocked; FIG. 9 is a front view showing a door-opening operation of a car door of an elevator according to one embodiment; FIG. 10 is a view showing a landing locking mechanism when a door main body of a landing door according to one embodiment is in a door-closed state; FIG. 11 is a view showing a landing locking mechanism when a door main body of a landing door according to one embodiment has moved to an unlocked position; FIG. 12 is a view showing a landing locking mechanism when a door main body of a landing door according to one embodiment is in a partially open state.

[0011] An elevator according to an embodiment will be described below with reference to Figures 1 to 12. Note that common members in each figure are given the same reference numerals.

[0012] 1. Elevator Configuration First, the configuration of an elevator according to one embodiment will be described with reference to Figs. 1 to 3. Fig. 1 is a schematic diagram showing an example of the configuration of an elevator according to one embodiment. Fig. 2 is a side view showing a state in which a car has stopped at an arbitrary floor. Fig. 3 is a front view of the car door of the car as seen from the landing side.

[0013] As shown in Figure 1, elevator 1 is a so-called machine room-less elevator that does not have a machine room above a hoistway 100 formed within a building structure. Note that the elevator of the present invention is not limited to machine room-less elevators, and may also be an elevator that has a machine room above the hoistway 100.

[0014] The elevator 1 has a car 110 that moves up and down in the elevator shaft 100, a hoist 120, a counterweight 130, a first driven pulley 140, a second driven pulley 150, and a rope 170.

[0015] A lifting pulley 111 is provided at the bottom of the car 110. A rope 170 is wound around the lifting pulley 111. The car 110 will be described in detail later.

[0016] A weight-side pulley 131 is provided above the counterweight 130. A rope 170 is wound around the weight-side pulley 131. The hoist 120 is disposed at the bottom of the hoistway 100. The hoist 120 raises and lowers the car 110 and the counterweight 130 in a bucket-like manner via the rope 170. The drive of the hoist 120 is controlled by a control unit (not shown).

[0017] The first driven pulley 140 and the second driven pulley 150 are rotatably attached to the top of the hoistway 100. One end and the other end of the rope 170 are fixed to the top of the hoistway 100. The rope 170 is installed from the weight-side pulley 131 provided on the counterweight 130 to the first driven pulley 140, and then wound around the hoist 120, the second driven pulley 150, and the lifting pulley 111 of the car 110 in this order.

[0018] The car 110 and the counterweight 130 move up and down within the hoistway 100 in response to the drive of the hoisting machine 120. Hereinafter, the direction in which the car 110 and the counterweight 130 move up and down will be referred to as the up and down direction.

[0019] As shown in Fig. 2 , the building structure also includes a landing 101 at each floor where the car 110 stops. A doorway 102 communicating with the elevator shaft 100 is formed in the landing 101. People and objects enter and exit the car 110 through the doorway 102. A landing door 210 is disposed in the doorway 102. The landing door 210 opens and closes the doorway 102.

[0020] The landing door 210 has a pair of door bodies 211A, 211B, a landing-side door unit 212, and a landing-side door sill 213. The landing-side door unit 212 is arranged at the upper end of the entrance / exit 102 in the vertical direction. The landing-side door sill 213 is arranged at the lower end of the entrance / exit 102 in the vertical direction. The landing-side door unit 212 and the landing-side door sill 213 support the pair of door bodies 211A, 211B so that they can slide horizontally. The configuration of the landing-side door unit 212 will be described later.

[0021] [Car] Next, the configuration of the car 110 will be described. As shown in Fig. 1, the car 110 has a car chamber 10 where people and objects get on and off, a pair of car doors 11A, 11B, a car-side door unit 12, and a car-side door sill 13 (see Fig. 2). One side of the car chamber 10 is provided with an opening that is opened and closed by the pair of car doors 11A, 11B. People and objects enter and exit the car chamber 10 through the opening.

[0022] The car-side door unit 12 is disposed at the upper end in the vertical direction of the opening of the car chamber 10. The car-side door sill 13 is disposed at the lower end in the vertical direction of the opening of the car chamber 10. The car-side door unit 12 and the car-side door sill 13 support a pair of car doors 11A, 11B so that they can slide horizontally.

[0023] 1 and 3, the car-side door unit 12 has a car-side door rail 15, a drive unit 16 (see FIG. 1), a transmission belt 17, and a driven roller 18. The car-side door rail 15 extends along the sliding direction of the pair of car doors 11A, 11B.

[0024] The drive unit 16 is disposed at one horizontal end of the car-side door unit 12. The driven roller 18 is disposed at the other horizontal end of the car-side door unit 12. A transmission belt 17 is wound around the drive shaft of the drive unit 16 and the driven roller 18.

[0025] The transmission belt 17 is formed endless with both longitudinal ends connected. When the drive shaft of the drive unit 16 rotates, the transmission belt 17 moves circulatingly between the driven roller 18 and the drive shaft of the drive unit 16. The transmission belt 17 is formed in a ring shape with its upper and lower parts moving in opposite directions in the horizontal direction. A first connecting member 22 (described later) is connected to the lower part of the transmission belt 17. A second connecting member 23 (described later) is connected to the upper part of the transmission belt 17.

[0026] A fixed hook member 34 and a cam member 57 of the car-side locking mechanism 30, which will be described later, are fixed to the car-side door unit 12. The fixed hook member 34 and the cam member 57 are disposed above the first car door 11A in the up-down direction when the pair of car doors 11A, 11B are closed.

[0027] Next, the pair of car doors 11A, 11B will be described. As shown in FIG. 3 , the pair of car doors 11A, 11B are each formed in a rectangular shape. A first door hanger 21A is attached to the upper end portion of the first car door 11A in the vertical direction. A second door hanger 21B is attached to the upper end portion of the second car door 11B in the vertical direction. Sliders 14 are provided at the lower end portions of the pair of car doors 11A, 11B in the vertical direction. The sliders 14 slidably engage with guide grooves provided in the car-side door sill 13.

[0028] The first door hanger 21A and the second door hanger 21B each rotatably support a moving roller 24. The moving roller 24 is engaged with the car-side door rail 15 so as to be able to roll.

[0029] The first door hanger 21A has a first connecting member 22. The first connecting member 22 protrudes upward from the upper end of the first door hanger 21A in the vertical direction. The first connecting member 22 is connected to the lower part of the transmission belt 17. The second door hanger 21B has a second connecting member 23. The second connecting member 23 protrudes upward from the upper end of the second door hanger 21B in the vertical direction. The second connecting member 23 is connected to the upper part of the transmission belt 17.

[0030] When the transmission belt 17 moves circulatingly, the pair of car doors 11A, 11B slide in the door-opening direction or the door-closing direction via the first connecting member 22 and the second connecting member 23. The door-opening direction is the direction in which the pair of car doors 11A, 11B move toward each other along the car-side door rail 15. The door-closing direction is the direction in which the pair of car doors 11A, 11B move away from each other along the car-side door rail 15.

[0031] The first car door 11A is provided with a safety shoe 25 and a car-side locking mechanism 30. The safety shoe 25 is supported by an end of the first car door 11A on the door closing direction side, i.e., a door-stop side end 11a that is close to the second car door 11B.

[0032] The safety shoe 25 is formed of a long member extending in the vertical direction. The vertical length of the safety shoe 25 is set to be approximately the same as the vertical length of the first car door 11A. The safety shoe 25 is supported on the door stop side end 11a of the first car door 11A via a pair of link members so as to be movable in the vertical direction and the opening / closing direction.

[0033] At the door stop side end 11a of the first car door 11A, a detection unit (not shown) that detects movement of the safety shoe 25 is disposed near the link member that supports the safety shoe 25. The detection unit detects movement of the safety shoe 25. Movement of the safety shoe 25 means that a load has been applied to the safety shoe 25.

[0034] [Car-side locking mechanism] Next, the car-side locking mechanism 30 will be described. As shown in Fig. 3, the car-side locking mechanism 30 has a base plate 31, a first car-side engaging element 32, a locking-side hook member 33, a fixed hook member 34, a rotating shaft 35, a locking retaining member 39, and a pair of first link members 41A, 41B. The car-side locking mechanism 30 also has a second car-side engaging element 52, a cam member 57, and a pair of second link members 61A, 61B.

[0035] The base plate 31 is formed in a generally flat plate shape. The base plate 31 is fixed to the first door hanger 21A. Hereinafter, the door-opening direction of the first car door 11A will be referred to as the door pocket side, and the door-closing direction of the first car door 11A will be referred to as the door stop side. A pair of first link members 41A, 41B are disposed on the end of the base plate 31 on the door stop side.

[0036] The pair of first link members 41A, 41B is composed of a lower first link member 41A and an upper first link member 41B. The lower first link member 41A is disposed at the lower end of the base plate 31 in the vertical direction. The upper first link member 41B is disposed at the upper end of the base plate 31 in the vertical direction. The lower first link member 41A and the upper first link member 41B are each rotatably supported on the base plate 31 via link shafts 42.

[0037] A shaft portion 43 is disposed on each end of the pair of first link members 41A, 41B opposite to the link shaft 42. A first car side engaging element 32 is attached to the shaft portions 43 of the pair of first link members 41A, 41B. Therefore, the first car side engaging element 32 is movably supported on the base plate 31 via the pair of first link members 41A, 41B.

[0038] The first car-side engaging element 32 is formed in an elongated shape extending a predetermined length in the vertical direction. A transmission portion 36 is formed in the middle of the first car-side engaging element 32 in the longitudinal direction. The transmission portion 36 protrudes from the end of the first car-side engaging element 32 on the door pocket side. The transmission portion 36 contacts a transmission pin 37, which will be described later.

[0039] A first stopper 45 fixed to the base plate 31 is disposed near the lower first link member 41A. When the car-side locking mechanism 30 is in the locked state, the first stopper 45 abuts against the door pocket side of the lower first link member 41A. Therefore, the counterclockwise rotation of the lower first link member 41A in Fig. 3 is restricted by the first stopper 45. Note that in this embodiment, the locked state of the car-side locking mechanism 30 refers to a state in which the car-side locking mechanism 30 locks the opening and closing operations of the pair of car doors 11A, 11B.

[0040] A plurality of second stoppers 46 fixed to the base plate 31 are arranged on the doorstop side of the first car-side engaging element 32. When the car-side locking mechanism 30 is in the locked state, the second stoppers 46 are arranged at a predetermined interval from the first car-side engaging element 32. When the pair of first link members 41A, 41B rotate and the first car-side engaging element 32 moves toward the doorstop side, the first car-side engaging element 32 abuts against the second stoppers 46. As a result, the second stoppers 46 restrict the movement of the first car-side engaging element 32 and the pair of first link members 41A, 41B.

[0041] The rotation shaft 35 is disposed on the base plate 31 closer to the door pocket side than the first car-side engaging element 32. A locking-side hook member 33 is rotatably supported on the rotation shaft 35.

[0042] The locking-side hook member 33 has a hook portion 33a, a rotation receiving portion 33b, a connection portion 33c, and an unlocking receiving portion 33d. The rotation receiving portion 33b is rotatably supported on a rotation shaft 35. A transmission pin 37 is disposed on the rotation receiving portion 33b below the rotation shaft 35 in the vertical direction and on the door stop side.

[0043] The transmission pin 37 is in contact with a transmission unit 36 ​​provided on the first car-side engaging element 32. When the first car-side engaging element 32 moves downward in the vertical direction toward the door stop side via the pair of first link members 41A, 41B, the movement of the first car-side engaging element 32 is transmitted to the transmission pin 37 via the transmission unit 36. As a result, the locking-side hook member 33 rotates counterclockwise (unlocking direction) in FIG. 3 around the rotation shaft 35.

[0044] The connecting portion 33c protrudes from the end of the rotation receiving portion 33b on the door stop side. A hook portion 33a is formed on the end of the connecting portion 33c opposite the rotation receiving portion 33b. The hook portion 33a protrudes toward the door stop side beyond the first car-side engaging element 32. When the car-side locking mechanism 30 is in the locked state, the hook portion 33a is positioned above the fixed hook member 34 in the vertical direction and engages with the fixed hook member 34 with a predetermined locking gap L1.

[0045] The unlocking receiving portion 33d protrudes upward from the upper end of the door pocket side end of the rotation receiving portion 33b in the vertical direction. The unlocking receiving portion 33d is located closer to the door pocket side than the rotation shaft 35 that supports the rotation receiving portion 33b. The unlocking receiving portion 33d engages with an unlocking lever 54, which will be described later. When the unlocking receiving portion 33d is pulled toward the door pocket side by the unlocking lever 54, the locking-side hook member 33 rotates around the rotation shaft 35 and is displaced in the unlocking direction.

[0046] The locking retaining member 39 is disposed at the top end in the vertical direction of the connecting portion 33c of the locking-side hook member 33. The locking retaining member 39 is disposed closer to the door stop than the first car-side engaging element 32. The locking retaining member 39 biases the locking-side hook member 33 downward in the vertical direction, i.e., in the locking direction, via the connecting portion 33c.

[0047] In this example, a compression coil spring is used as the locking and retaining member 39. However, the locking and retaining member 39 is not limited to a compression coil spring, and various other elastic members such as a leaf spring or rubber may also be used.

[0048] Furthermore, a pair of second link members 61A, 61B are arranged at the end of the base plate 31 on the door pocket side. The pair of second link members 61A, 61B is composed of a lower second link member 61A and an upper second link member 61B. The lower second link member 61A is arranged at the lower end of the base plate 31 in the vertical direction. The upper second link member 61B is arranged at the upper end of the base plate 31 in the vertical direction. The lower second link member 61A and the upper second link member 61B are each rotatably supported on the base plate 31 via link shafts 62.

[0049] A shaft portion 63 is disposed on each end of the pair of second link members 61A, 61B opposite to the link shaft 62. The second car side engaging element 52 is attached to the shaft portion 63. Therefore, the second car side engaging element 52 is movably supported on the base plate 31 via the pair of second link members 61A, 61B.

[0050] The second car-side engaging element 52 is formed in an elongated shape extending a predetermined length in the vertical direction. The second car-side engaging element 52 is arranged at a predetermined interval from the first car-side engaging element 32 on the base plate 31. The interval between the first car-side engaging element 32 and the second car-side engaging element 52 is set larger than the interval between the landing-side engaging elements 235, 236 described below. This allows the landing-side engaging elements 235, 236 to pass between the first car-side engaging element 32 and the second car-side engaging element 52 in the vertical direction.

[0051] Additionally, a third stopper 65 fixed to the base plate 31 is disposed vertically below the upper second link member 61B. The upper second link member 61B rotated clockwise comes into contact with the third stopper 65 (see FIG. 8). This restricts the rotational movement of the upper second link member 61B and also restricts downward movement of the second car-side engaging element 52 in the vertical direction.

[0052] A fourth stopper 66 fixed to the base plate 31 is disposed on the door pocket side of the second car side engaging element 52. When the pair of second link members 61A, 61B rotate and the second car side engaging element 52 moves toward the door pocket side, the second car side engaging element 52 abuts against the fourth stopper 66. As a result, the fourth stopper 66 restricts the movement of the second car side engaging element 52 and the pair of second link members 61A, 61B.

[0053] The upper end of the second car-side engaging element 52 in the vertical direction protrudes upward in the vertical direction beyond the upper end of the first door hanger 21A. A cam roller 53 is rotatably attached to the upper end of the second car-side engaging element 52. When the pair of car doors 11A, 11B is in a closed state, the cam roller 53 abuts against a cam member 57 fixed to the car-side door unit 12.

[0054] The cam member 57 is formed in a generally arcuate shape, and is curved toward the door stop side with the door pocket side of the first car door 11A open. When the cam roller 53 abuts against the cam member 57, the position of the second car side engaging element 52 is maintained in the locked state shown in FIG. 3 . That is, the second car side engaging element 52 is maintained in a position where the upper second link member 61B does not abut against the third stopper 65 and the second car side engaging element 52 does not abut against the fourth stopper 66. When the cam roller 53 separates from the cam member 57, the second car side engaging element 52 moves downward in the vertical direction due to its own weight.

[0055] An unlocking lever 54 is fixed to the second car-side engaging element 52. The unlocking lever 54 is disposed between the cam roller 53 of the second car-side engaging element 52 and the upper second link member 61B. The unlocking lever 54 protrudes from the second car-side engaging element 52 toward the door stop side. In the locked state, the unlocking lever 54 faces the unlocking receiving portion 33d of the locking-side hook member 33 at an appropriate distance. When the second car-side engaging element 52 moves toward the door pocket side, the unlocking lever 54 engages with the unlocking receiving portion 33d and pulls the unlocking receiving portion 33d toward the door pocket side.

[0056] [Landing-side Door Unit] Next, the configuration of the landing-side door unit 212 will be described with reference to Fig. 4. Fig. 4 is a front view of the landing door 210 as seen from the car 110 side.

[0057] As shown in FIG. 4 , the landing-side door unit 212 has a unit base 214, a landing-side door rail 215, a first pulley 216, a second pulley 218, a transmission belt 217, door hangers 221A and 221B, and a landing-side locking mechanism 230.

[0058] Hereinafter, the direction in which the pair of door bodies 211A, 211B slide will be referred to as the "sliding direction." The direction perpendicular to the sliding direction and the up-down direction will be referred to as the "depth direction." The unit base 214 is formed in a generally rectangular parallelepiped shape that is long in the sliding direction. A landing-side door rail 215, a first pulley 216, and a second pulley 218 are attached to the unit base 214.

[0059] The door hangers 221A, 221B are attached to the upper ends of the pair of door bodies 211A, 211B in the vertical direction. A movable roller 224 is rotatably attached to the door hangers 221A, 221B. The movable roller 224 is engaged with a platform-side door rail 215 so as to be able to roll. The platform-side door rail 215 extends along the sliding direction of the pair of door bodies 211A, 211B.

[0060] The door hanger 221A has a connecting member 222. The connecting member 222 protrudes upward from the upper end of the door hanger 221A in the vertical direction. The door hanger 221B has a connecting member 223. The connecting member 223 protrudes upward from the upper end of the door hanger 221B in the vertical direction. The door hanger 221A faces the first door hanger 21A of the elevator car 110. The door hanger 221A is provided with a platform-side locking mechanism 230. The configuration of the platform-side locking mechanism 230 will be described later.

[0061] The first pulley 216 is disposed on one side of the unit base 214 in the horizontal direction. The second pulley 218 is disposed on the other side of the unit base 214 in the horizontal direction. A transmission belt 217 is wound around the first pulley 216 and the second pulley 218. The transmission belt 217 is formed in an endless shape with both longitudinal ends connected. The transmission belt 217 is formed in a ring shape with an upper and lower portion that move in opposite directions in the horizontal direction.

[0062] A connecting member 222 is connected to the lower part of the transmission belt 217. A connecting member 223 is connected to the upper part of the transmission belt 217. When the transmission belt 217 moves in a circular motion, the pair of door bodies 211A, 211B move in the door-closing direction or the door-opening direction via the connecting members 222, 223. The door-opening direction is the direction in which the pair of door bodies 211A, 211B move toward each other. The door-closing direction is the direction in which the pair of door bodies 211A, 211B move away from each other.

[0063] [Platform-side locking mechanism] The platform-side locking mechanism 230 has a hook member 231, a pivot shaft 232, a hook receiving portion 234, a first platform-side engaging element 235, a second platform-side engaging element 236, a base plate 237, a locking retaining member 239, and a stopper 241.

[0064] The base plate 237 is formed in a generally flat plate shape and is fixed to the door hanger 221A. The hook receiving portion 234 is fixed to the door hanger 221B or the door main body 211B.

[0065] A rotation shaft 232 and a second landing-side engaging element 236 are fixed to the base plate 237. The rotation shaft 232 rotatably supports a hook member 231. A stopper 241 fixed to the base plate 237 abuts against the hook member 231. The stopper 241 restricts counterclockwise rotation of the hook member 231. A first landing-side engaging element 235 is rotatably attached to the upper end of the hook member 231.

[0066] The first landing-side engaging element 235 and the second landing-side engaging element 236 are arranged opposite to each other in the sliding direction of the pair of door bodies 211A, 211B. When the car 110 stops at any floor, the first landing-side engaging element 235 and the second landing-side engaging element 236 are arranged between the first car-side engaging element 32 and the second car-side engaging element 52 of the car-side locking mechanism 30 (see FIG. 3).

[0067] One end of the locking retaining member 239 is fixed to the base plate 237. The other end of the locking retaining member 239 is fixed to the upper end of the hook member 231 in the vertical direction. The locking retaining member 239 biases the hook member 231 in a direction in which it engages with the hook receiving portion 234, i.e., downward in the vertical direction. This maintains the engagement between the hook member 231 and the hook receiving portion 234, and keeps the hall-side locking mechanism 230 locked.

[0068] The locking and retaining member 239 corresponds to the biasing member according to the present invention. In this example, a compression coil spring is used as the locking and retaining member 239. However, the locking and retaining member 239 is not limited to a compression coil spring, and various other elastic members such as a leaf spring or rubber may also be used.

[0069] The force with which the lock retaining member 239 keeps the hall-side locking mechanism 230 locked is set to be greater than the force with which the lock retaining member 39 (see FIG. 3 ) of the car-side door unit 12 keeps the car-side locking mechanism 30 locked. In other words, the biasing force of the lock retaining member 39 of the car-side locking mechanism 30 is set to be smaller than the biasing force of the lock retaining member 239 of the hall-side locking mechanism 230.

[0070] The landing-side door unit 212 has an operating rope 245. One end of the operating rope 245 is connected to the side of the hook member 231 opposite to the side facing the hook receiver 234. The operating rope 245 is used when manually unlocking the landing-side locking mechanism 230 from the hoistway 100. When the operating rope 245 is pulled, a force is applied to the hook member 231 to rotate it about the rotation shaft 232 in a direction away from the hook receiver 234. As a result, the hook member 231 rotates against the biasing force of the locking retaining member 239, and the landing-side locking mechanism 230 is unlocked.

[0071] [Hook Member and Hook Receiving Portion] Next, the configurations of the hook member 231 and the hook receiving portion 234 will be described with reference to Figures 5 to 7. Figure 5 is a front view showing the platform-side locking mechanism 230. Figure 6 is a perspective view showing the platform-side locking mechanism 230. Figure 7 is a perspective view showing the platform-side locking mechanism 230 with the hook receiving portion 234 removed.

[0072] As shown in FIGS. 5 to 7, the hook member 231 has a hook base 251 , an extension portion 252 , and an unlocking portion 253 .

[0073] The hook base 251 is formed in the shape of a plate that is long in the horizontal direction. The hook base 251 is rotatably supported by the above-mentioned rotation shaft 232. The other end of the above-mentioned locking retaining member 239 is fixed to the upper end of the hook base 251 (see FIG. 4). A first hook 251a is formed at one longitudinal end of the hook base 251. When the pair of door bodies 211A, 211B (see FIG. 4) are in the door-closed state, the first hook 251a engages with the hook receiving portion 234.

[0074] The extension 252 is formed in the shape of a horizontally elongated rectangular plate. A second hook 252a is formed at one longitudinal end of the extension 252. The other longitudinal end of the extension 252 is fixed to the flat surface of the hook base 251 on the hoistway 100 side. The extension 252 can be fixed to the hook base 251 by welding or screws.

[0075] One longitudinal end of the extension 252 protrudes in the sliding direction beyond one end of the hook base 251. The second hook 252a of the extension 252 faces the first hook 251a of the hook base 251 in the sliding direction. As shown in Fig. 5, the distance from the surface of the first hook 251a that engages with the hook receiving portion 234 to the surface of the second hook 252a that engages with the hook receiving portion 234 is set to a predetermined distance M1.

[0076] When the pair of door bodies 211A, 211B (see FIG. 4) are opened from the closed state to a predetermined distance M1, the second hook 252a engages with the hook receiving portion 234. As a result, the sliding of the pair of door bodies 211A, 211B is locked in a door-opening intermediate state, which is the middle of the door-opening process. In the door-opening intermediate state, the pair of door bodies 211A, 211B open the doorway 102 (see FIG. 2) to an extent that prevents a worker (person) from passing through. The pair of door bodies 211A, 211B are double-swing doors. Therefore, the gap (opening) between the pair of door bodies 211A, 211B is approximately twice the predetermined distance M1.

[0077] As shown in Figure 6, the unlocking unit 253 has a connecting portion 261 and an arm portion 262. The connecting portion 261 is formed in a substantially rectangular plate shape. The connecting portion 261 is fixed to the flat surface of the hook base 251 on the hoistway 100 side using a screw. The arm portion 262 is continuous with the end face of the connecting portion 261 on the hook receiving portion 234 side. The arm portion 262 is located closer to the landing side (building side) than the extension portion 252.

[0078] The arm portion 262 is made of a plate that is approximately L-shaped when viewed from above. The arm portion 262 has an intermediate plate piece and an operation plate piece. The intermediate plate piece is continuous with the connecting portion 261 and extends in the depth direction. The intermediate plate piece has a plane that is perpendicular to the sliding direction. The operation plate piece is continuous with the intermediate plate piece and extends in the sliding direction.

[0079] A first unlocking piece 263 and a second unlocking piece 264 are formed on the upper end of the operation plate in the unlocking portion 253. The first unlocking piece 263 corresponds to the first unlocking portion of the present invention, and the second unlocking piece 264 corresponds to the second unlocking portion of the present invention. The first unlocking piece 263 and the second unlocking piece 264 are located closer to the landing side than the first hook 251a and the second hook 252a.

[0080] The first unlocking piece 263 and the second unlocking piece 264 are made of plates with flat surfaces perpendicular to the vertical direction. The first unlocking piece 263 is located closer to the connection part 261 than the second unlocking piece 264. The distance from the center of the first unlocking piece 263 to the center of the second unlocking piece 264 is set to a predetermined distance M1. When the first unlocking piece 263 or the second unlocking piece 264 is pressed from below with a rod or the like, the hook member 231 rotates around the rotation shaft 232.

[0081] The hook receiving portion 234 is attached to the unit base 214 via a mounting bracket 271. The hook receiving portion 234 is a bent member that is approximately L-shaped when viewed from the depth direction. The hook receiving portion 234 has a vertical piece extending in the up-down direction and a horizontal piece extending in the sliding direction. An engaging protrusion 234a is formed on the end of the horizontal piece opposite the end that is continuous with the vertical piece. The engaging protrusion 234a engages with the first hook 251a and second hook 252a described above.

[0082] An auxiliary hook receiver 254 is attached to a horizontal piece of the hook receiver portion 234. When the pair of door bodies 211A, 211B (see FIG. 4) are in the door-closed state, the auxiliary hook receiver 254 engages with the second hook 252a.

[0083] 2. Door-Opening Operation of Car Doors and Landing Doors Next, the door-opening operation of the elevator 1 having the above-described configuration will be described with reference to Figures 2, 3, 8, and 9. Figure 8 is a front view showing the state in which the car-side locking mechanism 30 is unlocked. Figure 9 is a front view showing the door-opening operation of the car doors.

[0084] As shown in Figure 2, when the car 110 stops at any floor, the car-side door unit 12 and the hall-side door unit 212 face each other. The car-side locking mechanism 30 and the hall-side locking mechanism 230 face each other. At this time, as shown in Figure 3, the first hall-side engaging element 235 and the second hall-side engaging element 236 are inserted between the first car-side engaging element 32 and the second car-side engaging element 52.

[0085] In the state shown in Figure 3, when the drive unit 16 (see Figure 1) is driven, the pair of car doors 11A, 11B move in the door-opening direction away from each other, causing the first car-side engaging element 32 to come into contact with the first landing-side engaging element 235 (see Figure 8).

[0086] When the first car door 11A moves further in the door-opening direction, the first car-side engaging element 32 is pressed by the first landing-side engaging element 235 in the direction opposite to the direction in which the first car door 11A moves. As a result, the pair of first link members 41A, 41B each rotate about the link shaft 42. Then, the first car-side engaging element 32 moves downward in the up-down direction in the direction opposite to the direction in which the first car door 11A moves.

[0087] The movement of the first car-side engaging element 32 is transmitted to the locking-side hook member 33 via the transmission unit 36 ​​and the transmission pin 37. As a result, the locking-side hook member 33 rotates about the rotation shaft 35 against the biasing force of the lock retaining member 39. The locking-side hook member 33 rotates from the locked position where the hook portion 33a engages with the fixed hook member 34 to an unlocked position where it faces upward in the vertical direction. This releases the engagement between the hook portion 33a and the fixed hook member 34, and the car-side locking mechanism 30 is unlocked. The first car-side engaging element 32 comes into contact with the second stopper 46, thereby stopping its movement.

[0088] As shown in Figure 9, when the first car door 11A moves further in the door-opening direction, the cam roller 53 provided on the second car-side engaging element 52 moves away from the cam member 57. As a result, the second car-side engaging element 52 moves downward in the vertical direction due to its own weight. The pair of second link members 61A, 61B connected to the second car-side engaging element 52 rotates about the link shaft 62. As a result, the second car-side engaging element 52 moves in a direction approaching the first car-side engaging element 32, i.e., toward the door stop side. Thereafter, the second car-side engaging element 52 abuts against the second landing-side engaging element 236. As a result, the two landing-side engaging elements 235, 236 are held by the first car-side engaging element 32 and the second car-side engaging element 52.

[0089] When the two landing-side engaging elements 235, 236 are held by the first car-side engaging element 32 and the second car-side engaging element 52, the engagement between the pair of car doors 11A, 11B and the pair of door bodies 211A, 211B is completed. After this, the pair of door bodies 211A, 211B move in the door-opening direction together with the pair of car doors 11A, 11B.

[0090] When the first car door 11A further moves in the door-opening direction, the first landing-side engaging element 235 is pressed by the first car-side engaging element 32. This causes the hook member 231 (see FIG. 4) of the landing-side locking mechanism 230 to rotate about the rotation shaft 232 against the biasing force of the locking retaining member 239. As a result, the landing-side locking mechanism 230 is unlocked, and the pair of door main bodies 211A, 211B move in the door-opening direction together with the car doors 11A, 11B. Thereafter, the car doors 11A, 11B of the car 110 and the pair of door main bodies 211A, 211B of the landing door 210 enter the door-open state.

[0091] 3. Unlocking the Landing-Side Locking Mechanism Next, unlocking the landing-side locking mechanism 230 will be described with reference to Figures 10 to 12. Figure 10 is a diagram showing the landing-side locking mechanism 230 when the pair of door bodies 211A, 211B of the landing door 210 are in a door-closed state. Figure 11 is a diagram showing the landing-side locking mechanism 230 when the pair of door bodies 211A, 211B have moved to the unlocked position. Figure 12 is a diagram showing the landing-side locking mechanism 230 when the pair of door bodies 211A, 211B are in a half-open state.

[0092] 10, when the pair of door bodies 211A, 211B are in the door-closed state, a clearance of a specific distance M2 is formed between the first hook 251a of the hook member 231 and the engaging protrusion 234a of the hook receiver 234. Also, a clearance of the specific distance M2 is formed between the second hook 252a and the auxiliary hook receiver 254. Therefore, the pair of door bodies 211A, 211B can be opened up to the specific distance M2 when in the door-closed state.

[0093] The specific distance M2 is shorter than the predetermined distance M1 (see FIG. 5). The pair of door bodies 211A, 211B are double-hinged doors. Therefore, the gap (opening) between the pair of door bodies 211A, 211B is approximately twice the specific distance M2. When the pair of door bodies 211A, 211B are opened to the specific distance M2, the pair of door bodies 211A, 211B are positioned in the unlocked position.

[0094] 11, when the pair of door bodies 211A, 211B are in the unlocked position, the first unlocking piece 263 is positioned so that it can be operated through the gap between the pair of door bodies 211A, 211B. Specifically, the first unlocking piece 263 faces an operation opening (not shown) provided in the unit base 214.

[0095] The worker uses a rod-shaped tool or the like to press from below on the first unlocking piece 263 that faces the operation opening. This causes the hook member 231 to rotate about the rotation shaft 232, disengaging the first hook 251a from the engaging protrusion 234a and disengaging the second hook 252a from the auxiliary hook receiver 254. As a result, the pair of door bodies 211A, 211B become slidable in the door-opening direction.

[0096] When the first hook 251a moves over the engaging protrusion 234a, the first unlocking piece 263 moves to a position where it does not face the operation opening. This prevents the operator from pressing the first unlocking piece 263 from below, and the hook member 231 is urged by the lock retaining member 239 to rotate around the rotation shaft 232. As a result, the second hook 252a faces the engaging protrusion 234a of the hook receiver 234 in the sliding direction.

[0097] When the pair of door bodies 211A, 211B are slid in the door-opening direction, the second hook 252a engages with the engaging protrusion 234a of the hook receiving portion 234. This locks the pair of door bodies 211A, 211B from sliding in the door-opening direction when the door bodies are partially open. At this time, the second unlocking piece 264 faces an operation opening (not shown) of the unit base 214.

[0098] When the pair of door bodies 211A, 211B are in a door-opening state, they open the doorway 102 (see FIG. 2) to an extent that prevents a worker (person) from passing through. This allows the worker an opportunity to check the status of the car 110 in the elevator shaft 100 before opening the pair of door bodies 211A, 211B. As a result, the landing door 210 can improve safety during maintenance and inspection work.

[0099] For example, after confirming that it is possible to enter the upper part of the car, the worker uses a rod-shaped tool or the like to press the second unlocking piece 264 facing the operation opening from below. This causes the hook member 231 to rotate around the rotation shaft 232, disengaging the second hook 252a from the engaging protrusion 234a. As a result, the pair of door bodies 211A, 211B can slide in the door-opening direction from the half-open state.

[0100] The landing-side locking mechanism 230 configured as described above is capable of two-stage locking with a single hook member 231. This allows the number of parts in the landing door to be reduced. Furthermore, because the landing-side locking mechanism 230 is capable of two-stage locking, safety can be improved when an operator opens the landing door 210.

[0101] In the door-closed state, a clearance of a specific distance M2 is formed between the first hook 251a and the engaging protrusion 234a of the hook receiver 234. In the door-closed state, when an operator opens the pair of door bodies 211A, 211B by the specific distance M2 in the door-opening direction, the first unlocking piece 263 can be operated through an operation opening (not shown). This prevents the first unlocking piece 263 from being easily operated by anyone other than the operator. Furthermore, an operator who knows the existence of the operation opening can easily unlock the door by operating the first unlocking piece 263.

[0102] The first unlocking piece 263 and the second unlocking piece 264 are located closer to the landing side than the first hook 251a and the second hook 252a. This allows a rod-shaped tool or the like to easily contact the first unlocking piece 263 and the second unlocking piece 264 without using complicated tools. As a result, the first unlocking piece 263 and the second unlocking piece 264 can be easily operated. Furthermore, when operating the first unlocking piece 263 or the second unlocking piece 264, the rod-shaped tool or the like does not interfere with the first hook 251a and the second hook 252a. As a result, damage to the first hook 251a and the second hook 252a can be suppressed or prevented.

[0103] In this embodiment, the hook member 231 has a hook base 251 and an extension 252 fixed to the hook base 251. However, the hook member according to the present invention may have the hook base and extension formed integrally, which further reduces the number of parts in the hall-side locking mechanism.

[0104] The landing-side locking mechanism 230 includes an auxiliary hook receiver 254 that engages with the second hook 252a when the door is closed. This strengthens the lock when the door is closed (unlocked position). Furthermore, when the door is closed and an attempt is made to open the pair of door bodies 211A, 211B, the force applied to the first hook 251a can be reduced.

[0105] The above has described the landing door and elevator of the present invention, including its functions and effects. However, the landing door and elevator of the present invention are not limited to the above-described embodiment, and various modifications are possible within the scope of the invention as set forth in the claims.

[0106] For example, in the above-described embodiment, the landing door 210 is a double-leaf door. However, the landing door according to the present invention may be any door that slides to open and close the doorway 102, and may be, for example, a single-leaf door.

[0107] In the above-described embodiment, the worker places the pair of door bodies 211A, 211B in the unlocked position and presses the first unlocking piece 263 facing the operation opening from below. However, the landing door according to the present invention may be configured such that an operation through-hole is formed in the door body 211A or the door body 211B, and the first unlocking piece 263 is pressed from below through the through-hole. In this case, there is no need to place the pair of door bodies 211A, 211B in the unlocked position.

[0108] In this specification, the words "parallel" and "orthogonal" are used, but these do not mean only "parallel" and "orthogonal" in the strict sense, but also include "parallel" and "orthogonal" and may also mean a "substantially parallel" or "substantially orthogonal" state within a range in which the functions can be exerted.

[0109] DESCRIPTION OF SYMBOLS 1...Elevator, 10...Cab, 11A, 11B...Cab door, 12...Cab side door unit, 13...Cab side door sill, 14...Slider, 15...Cab side door rail, 16...Drive unit, 17...Transmission belt, 18...Driven roller, 21A...First door hanger, 21B...Second door hanger, 22...First connecting member, 23...Second connecting member, 24...Moving roller, 30...Cab side locking mechanism, 100...Hoistway, 101...Landing platform, 102...Entrance / exit, 110...Passenger car, 111...Lifting pulley, 120...Hoisting machine, 131...Weight side pulley, 140...First driven pulley, 150...Second driven pulley, 170...Rope, DESCRIPTION OF SYMBOLS 210...Landing door, 211A, 211B...Door body, 212...Landing side door unit, 213...Landing side door sill, 214...Unit base, 215...Landing side door rail, 216...First pulley, 217...Transmission belt, 218...Second pulley, 221A, 221B...Door hanger, 222, 223...Coupling member, 224...Moving roller, 230...Landing side locking mechanism, 231...Hook member, 232...Pivoting shaft, 234...Hook receiving portion, 234a...Engaging protrusion, 235...First landing side engaging element, 236...Second landing side engaging element, 237...Base plate, 239...Lock retaining member, 241...Stopper, 245...Operating rope, 251...Hook base, 251a...First hook, 252...Extension portion, 252a...Second hook, 253...Unlocking portion, 261...Connection portion, 262...Arm portion, 263...First unlocking piece, 264...Second unlocking piece, 271...Mounting bracket

Claims

1. A landing door comprising: a door body which slides horizontally to open and close a doorway communicating with an elevator shaft; and a locking mechanism which locks the door body in a door-closed state in which the door body is closed, and in a door-opening state in which the door body is opened a predetermined distance from the closed state, wherein the locking mechanism comprises: a hook member having a first hook and a second hook and rotating around a rotation axis perpendicular to the sliding direction and up-down direction of the door body; a hook receiving portion which engages with the first hook in the door-closed state and engages with the second hook in the door-opening state; a biasing member which biases the hook member to a position in which the first hook and the second hook face the hook receiving portion in the sliding direction of the door body; a first unlocking portion connected to the hook member and capable of rotating the hook member in the door-closed state; and a second unlocking portion connected to the hook member and capable of rotating the hook member in the door-opening state.

2. The landing door according to claim 1, wherein in the halfway open state, the door body opens to an extent that prevents a person from passing through the entranceway.

3. The landing door according to claim 1, wherein in the door closed state, a clearance of a specific distance shorter than the predetermined distance is formed between the first hook and the hook receiving portion, and when in the door closed state, an operator opens the door body to the specific distance in the door opening direction, the first unlocking portion becomes operable.

4. The landing door according to claim 3, wherein the first unlocking section and the second unlocking section are located closer to the landing side than the first hook and the second hook.

5. The landing door according to claim 1, wherein the first unlocking section and the second unlocking section are integrally formed.

6. The landing door according to claim 1, further comprising an auxiliary hook receiving portion that engages with the second hook in the door closed state.

7. An elevator comprising: a car that moves up and down within a shaft; a door body that slides horizontally to open and close an entrance communicating with the shaft; and a landing door having a locking mechanism that locks the door body in a door-closed state in which the door body is closed and in a door-opening state in which the door body is opened a predetermined distance from the door-closed state, the locking mechanism having: a hook member having a first hook and a second hook and rotating around a rotation axis perpendicular to the sliding direction and up and down directions of the door body; a hook receiving portion that engages with the first hook in the door-closed state and engages with the second hook in the door-opening state; a biasing member that biases the hook member to a position in which the first hook and the second hook face the hook receiving portion in the sliding direction of the door body; a first unlocking portion connected to the hook member and capable of rotating the hook member in the door-closed state; and a second unlocking portion connected to the hook member and capable of rotating the hook member in the door-opening state.

Images