elevator

Abstract

According to the present invention, a lock mechanism comprises a locking-side hook member, a fixing hook member, a detection switch, a hook-side protection part, and a switch-side protection part. The locking-side hook member is movably supported in a door. The fixing hook member engages with the locking-side hook member in a releasable manner. The detection switch detects opening / closing of the door. The hook-side protection part is provided to the locking-side hook member. The switch-side protection part overlaps the hook-side protection part in the vertical direction in a locked state and restricts the turning action of the locking-side hook member by coming into contact with the hook-side protection part.

Description

[Technical Field]

[0001] The present invention relates to an elevator equipped with a locking mechanism that locks a door in an unlockable manner. [Background technology]

[0002] Conventionally, the landing door on the landing side of an elevator is provided with a landing-side locking mechanism that locks and unlocks the opening and closing operation to prevent passengers from falling into the elevator shaft. In recent years, elevators have also been proposed that are provided with a car-side locking mechanism on the car side that locks and unlocks the opening and closing operation of the car-side door of the car.

[0003] An example of technology related to such a locking mechanism is described in Patent Document 1. Patent Document 1 describes an elevator equipped with a base plate, a locking hook member, a fixed hook member, a car-side engaging element, and a forced unlocking mechanism capable of operating the car-side engaging element. The base plate has a rope support surface portion extending to the lower end of the car-side door. The forced unlocking mechanism has an unlocking rope and a guide member that supports the unlocking rope. One end of the unlocking rope is disposed at the lower end of the car-side door, and the other end is connected to the car-side engaging element.

[0004] The locking mechanism is also equipped with a detection switch that detects the unlocked state of the door. The detection switch has a fixed contact point, and detects the locked or unlocked state of the locking mechanism by connecting or disconnecting a movable contact point provided on the locking hook member to or from the fixed contact point. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-99315 Summary of the Invention [Problem to be solved by the invention]

[0006] Furthermore, when elevator operation is interrupted due to a power outage, earthquake, or other reasons, an operator rotates the locking hook member to unlock the locking mechanism. To release the connection between the movable contact and the fixed contact, the door must be moved a predetermined distance in the door opening direction before the locking hook member can be rotated. However, with the technology described in Patent Document 1, the locking hook member can be rotated while the movable contact and the fixed contact are connected. Therefore, with the technology described in Patent Document 1, there is a risk of the detection switch being damaged if the locking hook member is rotated while the movable contact and the fixed contact are connected.

[0007] In consideration of the above problems, the present invention aims to provide an elevator that can prevent damage to the detection switch and safely unlock the lock mechanism. [Means for solving the problem]

[0008] In order to solve the above problems and achieve this object, the elevator is equipped with a door provided at the opening of the car that moves up and down in an elevator shaft provided in the building structure, or at the entrance and exit of the landing where the car stops in the building structure, and a locking mechanism that locks the door so that it can be unlocked. The locking mechanism includes a locking hook member, a fixed hook member, a detection switch, a hook side protection part, and a switch side protection part. The locking hook member is rotatably supported on the door. The fixed hook member releasably engages with the locking hook member. The detection switch detects whether the door is open or closed. The hook side protection part is provided on the locking hook member. In the locked state, the switch side protection part overlaps with the hook side protection part in the vertical direction, and the abutment of the hook side protection part restricts the rotational movement of the locking side hook member. The detection switch has a fixed contact provided on a member different from the member on which the locking hook member is provided, and a movable contact provided on the locking hook member. [Effects of the Invention]

[0009] According to the elevator having the above configuration, damage to the detection switch can be prevented, and the locking mechanism can be unlocked safely. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic diagram showing an elevator according to an embodiment of the present invention; [Figure 2] 1 is a side view showing a state in which an elevator car according to an embodiment has stopped at an arbitrary floor. FIG. [Figure 3] FIG. 1 is a front view of an elevator entrance according to an embodiment, seen from the elevator car side. [Figure 4] 1 is a front view showing a car-side door provided in an elevator car according to an embodiment. FIG. [Figure 5] 1 is a front view showing an elevator car-side locking mechanism (locking mechanism) according to an embodiment. FIG. [Figure 6] 1 is an enlarged view showing the vicinity of a detection switch of an elevator car-side locking mechanism according to an embodiment. FIG. [Figure 7] 1 is an explanatory diagram showing the unlocking operation of the elevator car-side locking mechanism under normal circumstances according to an embodiment of the present invention; FIG. [Figure 8] 10 is an explanatory diagram showing the unlocking operation of the elevator car-side locking mechanism during rescue in accordance with an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] An elevator according to an embodiment will be described below with reference to Figures 1 to 8. 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 an embodiment (hereinafter referred to as "this example") will be described with reference to Figs. 1 to 6. FIG. 1 is a schematic diagram showing an example of the configuration of the elevator of this embodiment, and FIG. 2 is a side view showing a state in which the elevator car has stopped at an arbitrary floor.

[0013] As shown in Fig. 1, the elevator 1 of this example 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, although an example of a machine room-less elevator is described for the elevator 1 of this example, the elevator is not limited to this, 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 elevator shaft 100, and 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.

[0017] The first driven pulley 140 and the second driven pulley 150 are fixed 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 is then wound around the hoisting machine 120, the second driven pulley 150, and the lifting pulley 111 of the car 110 in that order.

[0018] When the hoist 120 is driven, the car 110 and the counterweight 130 move up and down within the hoistway 100. 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] 2, a landing 101 where the car 110 stops on each floor of the building structure is provided with a doorway 102 for people and objects to enter and exit the car 110. A pair of landing-side doors 211 (211A, 211B) are provided at the doorway 102 so that they can be opened and closed.

[0020] The landing side door 211 is supported so as to be openable and closable by a landing side door unit 212 provided at the upper end of the entrance / exit 102 in the vertical direction and a landing side door sill 213 provided at the lower end of the entrance / exit 102 in the vertical direction. [Landside door unit and landside door] Next, the configuration of the landing side door unit 212 will be described with reference to FIG. FIG. 3 is a front view of the entrance 102 as seen from the car 110 side.

[0021] As shown in Fig. 3, the landing-side door unit 212 has a landing-side door rail 215, a first pulley 216, a second pulley 218, a transmission belt 217, door hangers 221, 221, and a landing-side locking mechanism 230. The door hanger 221 is provided at the upper end of the landing-side door 211 in the up-down direction. A moving roller 224 is rotatably attached to the door hanger 221. The moving roller 224 slidably engages with the landing-side door rail 215. The landing-side door rail 215 extends along the opening and closing direction of the pair of landing-side doors 211, 211.

[0022] Furthermore, the two door hangers 221 are provided with connecting members 222 and 223, respectively. The connecting members 222 and 223 are connected to a transmission belt 217, which will be described later. Furthermore, of the two door hangers 221 and 211, the door hanger 221 that faces the first door hanger 21A of the car 110 is provided with a platform-side locking mechanism 230. The platform-side locking mechanism 230 will be described later.

[0023] The first pulley 216 is disposed on one side of the landing-side door unit 212 in the horizontal direction, and the second pulley 218 is disposed on the other side of the landing-side door unit 212 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 ends in the longitudinal direction connected. The upper and lower parts of the transmission belt 217 in the up-down direction move in opposite directions.

[0024] A first connecting member 222 is connected to the lower part of the transmission belt 217, which is the return side, and a second connecting member 223 is connected to the upper part of the transmission belt 217, which is the outgoing side. When the transmission belt 217 moves, the pair of landing side doors 211, 211 move via the connecting members 222, 223 in a door-closing direction in which they approach each other, or in a door-opening direction in which they move away from each other.

[0025] The landing-side locking mechanism 230 has a locking-side hook member 231, a rotating shaft 232, two landing-side engaging members 235, 235, and a fixed hook member 234. The rotating shaft 232 is provided on one of the two door hangers 221. The locking-side hook member 231 is rotatably provided on the rotating shaft 232. The locking-side hook member 231 is engaged with the fixed hook member 234 in an unlockable manner. In addition, landing-side engaging members 235, 235 are arranged on the locking-side hook member 231. The two landing-side engaging members 235, 235 are arranged opposite each other in the opening and closing direction of the pair of landing doors 211A. In addition, when the car 110 stops at a given floor, the landing-side engaging member 235 faces a car-side engaging member 32 of the car-side locking mechanism 30, which will be described later, at a predetermined interval.

[0026] The fixed hook member 234 is fixed to a door hanger 221 or the landing side door 211 different from the door hanger 221 on which the rotation shaft 232 and the locking side hook member 231 are provided.

[0027] In addition, a locking retaining member (not shown) is disposed near the hall-side engaging element 235 of the locking-side hook member 231. The locking retaining member biases the locking-side hook member 231 in the locking direction, i.e., downward in the up-down direction. This maintains the locked state of the locking-side hook member 231 of the hall-side locking mechanism 230.

[0028] The force with which the locking and retaining member in the hall-side locking mechanism 230 maintains the locked state is set to be greater than the force with which the locking and retaining member of the car-side locking mechanism 30, which will be described later, maintains the locked state. In other words, the biasing force of the locking and retaining member of the car-side locking mechanism 30 is set to be smaller than the biasing force of the locking and retaining member of the hall-side locking mechanism 230.

[0029] [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 side doors 11A and 11B, a car side door unit 12, and a car side door sill 13. An opening is provided on one side of the car chamber 10. People and objects get in and out through this opening.

[0030] The car side door unit 12 is provided at the upper end in the vertical direction of the opening of the car chamber 10, and the car side door sill 13 is provided at the lower end in the vertical direction of the opening of the car chamber 10. The pair of car side doors 11A, 11B are supported by the car side door unit 12 and the car side door sill 13 so as to be able to open and close in the horizontal direction perpendicular to the vertical direction.

[0031] FIG. 4 is a front view of the car-side door 11A as seen from the landing side. 1 and 4, the car side door unit 12 is provided with a car side door rail 15, a drive unit 16, a transmission belt 17, and a driven roller 18. The car side door rail 15 is parallel to the horizontal direction and extends along the opening and closing direction of the pair of car side doors 11A, 11B.

[0032] The drive unit 16 is disposed at one horizontal end of the car-side door unit 12, and 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.

[0033] The transmission belt 17 is formed endlessly with both longitudinal ends connected. When the drive unit 16 is driven, the transmission belt 17 moves circulatingly between the driven roller 18 and the drive shaft of the drive unit 16. At this time, the upper and lower parts of the transmission belt 17 move in opposite directions in the vertical direction. A first connecting member 22 (described later) is connected to the lower part of the transmission belt 17, which is the return side, and a second connecting member 23 (described later) is connected to the upper part of the transmission belt 17, which is the outward side.

[0034] Additionally, a fixed hook member 34 constituting a car side locking mechanism 30 (described later) is fixed to the car side door unit 12. The fixed hook member 34 is disposed above the first car side door 11A in the up-down direction when the pair of car side doors 11A, 11B are closed.

[0035] Next, the pair of car-side doors 11A and 11B will be described. The pair of car side doors 11A, 11B are each formed in a rectangular shape. A first door hanger 21A is provided at the top end in the vertical direction of the first car side door 11A, and a second door hanger 21B is provided at the bottom end in the vertical direction of the second car side door 11B. Furthermore, sliders 14 are provided at the bottom end in the vertical direction of the pair of car side doors 11A, 11B. The sliders 14 slidably engage with guide grooves provided in the car side door sill 13.

[0036] The first door hanger 21A and the second door hanger 21B are each provided with a rotatable moving roller 24. The moving roller 24 is slidably engaged with the car-side door rail 15.

[0037] The first door hanger 21A has a first connecting member 22, and the second door hanger 21B has a second connecting member 23. The first connecting member 22 protrudes upward from the upper end of the first door hanger 21A in the vertical direction. The second connecting member 23 protrudes upward from the upper end of the second door hanger 21B in the vertical direction. The first connecting member 22 is connected to the lower part of the transmission belt 17, and the second connecting member 23 is connected to the upper part of the transmission belt 17.

[0038] Therefore, when the drive unit 16 is driven and the transmission belt 17 moves, the pair of car side doors 11A, 11B move toward each other in the door opening direction, or away from each other in the door closing direction, via the first connecting member 22 and the second connecting member 23.

[0039] The first car-side door 11A is provided with a safety shoe 25 and a car-side locking mechanism 30. The safety shoe 25 is provided at the end of the first car-side door 11A on the door closing direction side, i.e., at the door stop side end 11a approaching the second car-side door 11B.

[0040] The safety shoe 25 is formed of a long member extending in the vertical direction with a length substantially equal to the vertical length of the first car-side door 11A. This safety shoe is supported on the doorstop side end portion 11a of the first car-side door 11A via a pair of link members so as to be movable in the vertical direction and the opening and closing direction. Furthermore, a detection unit (not shown) that detects movement of the safety shoe 25 is provided on the doorstop side end portion 11a of the first car-side door 11A near the link members that support the safety shoe 25. The detection unit detects the movement of the safety shoe 25, thereby detecting the application of a load to the safety shoe 25.

[0041] [Basket side locking mechanism] Next, the car-side locking mechanism 30 will be described with reference to FIG. FIG. 5 is a front view showing the car-side locking mechanism 30. As shown in FIG.

[0042] 5, a car-side locking mechanism 30, which is an example of a locking mechanism, has a base plate 31, a car-side engaging element 32, a locking-side hook member 33, a fixed hook member 34, a rotating shaft 35, a locking retaining member (not shown), a first link member 41A, and a second link member 41B. The car-side locking mechanism 30 also has a detection switch 81.

[0043] The fixed hook member 34 is fixed to the car-side door unit 12. The fixed hook member 34 may also be fixed to the second door hanger 21B or the car-side door 11B. The fixed hook member 34 is provided with a hook portion 34a. The hook portion 34a engages with a hook portion 33a (described later) of the locking-side hook member 33.

[0044] The base plate 31 is formed in a substantially flat plate shape. The base plate 31 is fixed to the first door hanger 21A. A rotation shaft 35, a first stopper 45, a plurality of second stoppers 46, and link shafts 42, 42 of link members 41A, 41B are fixed to the base plate 31.

[0045] The first link member 41A is rotatably supported by a link shaft 42 provided at the lower end in the vertical direction of the base plate 31. The second link member 41B is rotatably supported by a link shaft 42 provided at the upper end in the vertical direction of the base plate 31. A shaft portion 43 is provided at each end of the first link member 41A and the second link member 41B opposite to the link shaft 42.

[0046] The car-side engaging element 32 is rotatably attached to the two shaft portions 43, 43. The car-side engaging element 32 is formed of an elongated member extending a predetermined length in the ascending / descending direction of the car 110. Furthermore, when the car-side locking mechanism 30 is in a locked state, the first link member 41A and the second link member 41B face upward in the vertical direction so that the ends of the shaft portions 43, 43 that are connected to the car-side engaging element 32 are higher in the horizontal direction than the ends of the link shafts 42, 42. Therefore, when the car-side locking mechanism 30 is in a locked state, the car-side engaging element 32 is positioned in a state where it is lifted upward in the vertical direction by the first link member 41A and the second link member 41B.

[0047] Furthermore, when the car 110 stops at a given floor and before the car-side locking mechanism 30 is unlocked, a platform-side engaging element 235 of the platform-side locking mechanism 230, which will be described later, is disposed on the door-opening direction side of the car-side engaging element 32 toward the car-side door 11A. At this time, the car-side engaging element 32 and the platform-side engaging element 235 face each other with a predetermined distance T between them.

[0048] The first stopper 45 is disposed near the first link member 41A provided at the bottom end in the vertical direction. When the car-side locking mechanism 30 is in the locked state, the first stopper 45 abuts against the first link member 41A on the side of the car-side door 11A in the door-opening direction. Therefore, the first link member 41A and the second link member 41B are restricted from rotating in the counterclockwise direction in FIG. 5.

[0049] The multiple second stoppers 46 face the end of the car-side engaging element 32 on the door-closing direction side of the car-side door 11A at a predetermined interval M. This interval M is the horizontal movement range of the car-side engaging element 32. When the first link member 41A and the second link member 41B rotate and the car-side engaging element 32 moves downward in the up-down direction and toward the door-closing direction of the car-side door 11A, the car-side engaging element 32 comes into contact with the second stoppers 46, thereby restricting the movement of the car-side engaging element 32 and the first link member 41A and second link member 41B.

[0050] A transmission part 36 is provided at a longitudinal midpoint of the first car-side engaging element 32. The transmission part 36 is provided at the door pocket side end of the first car-side engaging element 32. The transmission part 36 contacts a transmission pin 37, which will be described later.

[0051] Further, a rotation shaft 35 is disposed on the door-opening direction side of the car-side door 11A from the car-side engaging element 32 attached to the base plate 31 via the first link member 41A and the second link member 41B. A locking-side hook member 33 is rotatably supported on the rotation shaft 35.

[0052] 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.

[0053] The transmission pin 37 is in contact with a transmission unit 36 ​​provided on the 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 link members 41A, 41B, the movement of the car-side engaging element 32 is transmitted to the transmission pin 37 via the transmission unit 36. This causes the locking-side hook member 33 to rotate counterclockwise (unlocking direction) in FIG. 5 around the rotation shaft 35.

[0054] A connecting portion 33c is provided at the end of the rotation receiving portion 33b on the door stop side. The connecting portion 33c protrudes from the rotation receiving portion 33b toward the door stop side. A hook portion 33a is formed at the end of the connecting portion 33c opposite the rotation receiving portion 33b. The hook portion 33a protrudes further toward the door stop side than the 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 hook portion 34a of the fixed hook member 34 with a predetermined distance S between them.

[0055] Here, the distance S between the hook portions 33a and 34a is set to be at least equal to or greater than the sum of the distance M between the second stopper 46 and the car side engaging element 32 and the distance T between the car side engaging element 32 and the platform side engaging element 235.

[0056] Here, the rotation shaft 35 is provided on the car-side engaging element 32 on the door-opening direction side of the car-side door 11A, and the hook portion 33a protrudes from the car-side engaging element 32 on the side opposite to the rotation shaft 35 in the door-closing direction side of the car-side door 11A. That is, the car-side engaging element 32 is disposed between the rotation shaft 35 and the hook portion 33a of the locking-side hook member 33. This makes it possible to increase the rotation radius of the locking-side hook member 33 compared to when the rotation shaft 35 is provided on the car-side engaging element 32 on the door-closing direction side of the car-side door 11A. This allows the hook portion 33a to move significantly upward in the vertical direction with a small rotation amount, making it possible to reduce the movement amount of the car-side engaging element 32.

[0057] A locking retaining member (not shown) is attached to the upper vertical end of the connecting portion 33c of the locking-side hook member 33, and the locking retaining member is disposed closer to the door stop than the car-side engaging element 32. The locking retaining member biases the locking-side hook member 33 downward in the vertical direction, i.e., in the locking direction, via the connecting portion 33c.

[0058] As the locking and retaining member, various elastic members such as a compression coil spring, a leaf spring, or a rubber band are used.

[0059] Next, the detailed configuration of the detection switch 81 will be described. FIG. 6 is an enlarged view showing the vicinity of the detection switch 81.

[0060] 5, the detection switch 81 and the fixed hook member 34 are fixed to the car-side door unit 12. The fixed hook member 34 may be fixed to the second door hanger 21B or the car-side door 11B. That is, the detection switch 81 is disposed on the car-side door 11B on the opposite side to the car-side door 11A or on a non-moving member.

[0061] 6, the detection switch 81 has a fixed contact 82 and a movable contact 72. The fixed contact 82 is provided at the end of the detection switch 81 on the door opening direction side, i.e., the end on the side facing the car door 11A. In this example, two fixed contacts 82 are provided in the detection switch 81, but the number of fixed contacts 82 is not limited to two.

[0062] The fixed-side contact 82 is a hole recessed from the end of the detection switch 81 in the door-opening direction along the opening / closing direction. Therefore, the end face of the fixed-side contact 82 in the door-opening direction is open. Furthermore, the electrode of the detection switch 81 is located on the end face of the fixed-side contact 82 in the door-closing direction, i.e., on the bottom surface of the hole. By locating the electrode of the detection switch 81 in a recessed position in the hole in this way, it is possible to prevent an operator from coming into contact with the electrode and receiving an electric shock. Furthermore, because the opening of the fixed-side contact 82 faces the opening / closing direction, which is perpendicular to the up-down direction, it is possible to prevent dirt, dust, etc. from entering the fixed-side contact 82. The movable-side contact 72 is inserted into this fixed-side contact 82.

[0063] In addition, a switch-side protective part 77 is provided at the lower end of the detection switch 81 in the vertical direction. The switch-side protective part 77 protrudes downward in the vertical direction from the lower end of the detection switch 81. The tip of the switch-side protective part 77, i.e., the lower end in the vertical direction, is positioned vertically lower than the connection part 33c of the locking-side hook member 33 in the locked state. In addition, the lower end of the switch-side protective part 77 protrudes in the door-opening direction. The hook-side protective part 76, which will be described later, abuts against this switch-side protective part 77.

[0064] A fixed bracket 75 is fixed to the locking side hook member 33. The fixed bracket 75 is provided on the connection portion 33c of the locking side hook member 33. The fixed bracket 75 is also disposed on the door closing direction side of the rotation shaft 35. A contact support portion 71 and a hook side protection portion 76 are fixed to the fixed bracket 75.

[0065] The contact support portion 71 is disposed at the end of the fixed bracket 75 on the door closing direction side. The contact support portion 71 is also disposed up and down higher than the locking-side hook member 33. In the locked state, the contact support portion 71 faces the end face of the detection switch 81 on the door opening direction side. The contact support portion 71 is provided with two movable-side contacts 72 of the detection switch 81.

[0066] The movable-side contact 72 protrudes from one surface of the contact support part 71 facing the detection switch 81 in the door closing direction, i.e., toward the main body of the detection switch 81. The movable-side contact 72 is removably inserted into the fixed-side contact 82. When the movable-side contact 72 is inserted into the fixed-side contact 82, the detection switch 81 detects that the car-side locking mechanism 30 is in the locked state. When the movable-side contact 72 comes out of the fixed-side contact 82, the detection switch 81 detects that the car-side locking mechanism 30 is in the unlocked state.

[0067] In this example, an example in which two movable contacts 72 are provided has been described, but this is not limited to this, and the number of movable contacts 72 may be any number as long as it corresponds to the number of fixed contacts 82.

[0068] The lower end of the fixed bracket 75 in the vertical direction is located vertically lower than the connection portion 33c of the locking-side hook member 33, and a hook-side protective portion 76 is provided at the lower end of the fixed bracket 75. The hook-side protective portion 76 is formed in a substantially flat plate shape. The hook-side protective portion 76 protrudes from the lower end of the fixed bracket 75 in the door closing direction. In addition, in the locked state, the hook-side protective portion 76 is located vertically below the switch-side protective portion 77 with a predetermined distance L4 therebetween. Therefore, in the locked state, the hook-side protective portion 76 and the switch-side protective portion 77 at least partially overlap when viewed from the vertical direction.

[0069] The overlapping distance between the hook-side protective part 76 and the switch-side protective part 77 in the vertical direction is set to be longer than the insertion depth of the movable-side contact 72 into the fixed-side contact 82. In addition, the overlapping distance between the hook-side protective part 76 and the switch-side protective part 77 is set to be shorter than the distance S (see FIG. 5) between the hook part 33a of the locking-side hook member 33 and the hook part 34a of the fixed hook member 34.

[0070] Here, if the outer diameter of the movable contact 72 is L1 and the opening diameter of the fixed contact 82 is L2, then the gap L3 between the fixed contact 82 and the movable contact 72 is L2 - L1. Furthermore, the length from the center of the pivot shaft 35 to the tip of the movable contact 72 is R, and the length from the center of the pivot shaft 35 to the tip of the hook-side protective part 76 is r. In the locked state, the angle formed by the line connecting the tip of the hook-side protective part 76 to the center of the pivot shaft 35 and the line connecting the tip of the movable contact 72 to the center of the pivot shaft 35 is β. In the locked state, the angle between when the movable contact 72 abuts against the fixed contact 82 and when the hook-side protective part 76 abuts against the switch-side protective part 77 is α.

[0071] In this case, the detection switch 81 is disposed at a position that satisfies the following formula 1. [Formula 1] L3(-Rsinβ+Rsin(α+β))≦L4(rsinα)

[0072] 2. Unlocking the car locking mechanism 2-1. Normal time Next, the unlocking operation of the car-side locking mechanism (locking mechanism) 30 having the above-described configuration will be described with reference to Figures 7 and 8. First, the unlocking operation under normal circumstances will be described with reference to Figure 7. FIG. 7 is an explanatory diagram showing the unlocking operation under normal circumstances.

[0073] As shown in Fig. 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, and the car-side locking mechanism 30 and the hall-side locking mechanism 230 face each other. Then, as shown in Fig. 5, the car-side engaging element 32 and the hall-side engaging element 235 face each other in the opening / closing direction.

[0074] At this time, as shown in Figure 7(a), the locking-side hook member 33 and the fixed hook member 34 of the car-side locking mechanism 30 are engaged, and the car-side locking mechanism 30 is in a locked state. In addition, the hook-side protective part 76 and the switch-side protective part 77 overlap each other in the vertical direction, restricting the rotational movement of the locking-side hook member 33.

[0075] In this state, when the drive unit 16 is driven and the pair of car-side doors 11A, 11B move in the door-opening direction away from each other, the car-side engaging element 32 comes into contact with the hall-side engaging element 235. When the first car-side door 11A moves further in the door-opening direction, the car-side engaging element 32 is pressed by the hall-side engaging element 235 in the direction opposite to the direction in which the first car-side door 11A moves. As a result, the link members 41A, 41B each rotate about the link shaft 42. Then, the car-side engaging element 32 moves downward in the vertical direction, in the direction opposite to the direction in which the first car-side door 11A moves.

[0076] Furthermore, as the car-side doors 11A and 11B move in the door-opening direction, the locking-side hook member 33 provided on the car-side door 11A also moves in the door-opening direction. Therefore, as shown in FIG. 7(b), the movable-side contact 72 provided on the locking-side hook member 33 comes out of the fixed-side contact 82. This causes the detection switch 81 to detect the door-opening operation of the car-side doors 11A and 11B. Furthermore, as the locking-side hook member 33 moves in the door-opening direction, the hook-side protective part 76 also moves in the door-opening direction. Therefore, the hook-side protective part 76 moves away from the switch-side protective part 77, and the hook-side protective part 76 and the switch-side protective part 77 no longer overlap in the vertical direction. As a result, the locking-side hook member 33 can rotate.

[0077] The movement of the car-side engaging member 32 is transmitted to the locking-side hook member 33 via the transmission portion 36 and the transmission pin 37. Therefore, the locking-side hook member 33 rotates about the rotation shaft 35 against the biasing force of the lock holding member. Then, the locking-side hook member 33 rotates from the locked position where the hook portion 33a engages with the fixed hook member 34 to the unlocked position where it faces upward in the vertical direction. In addition, since the overlap between the hook-side protective portion 76 and the switch-side protective portion 77 is eliminated, As shown in Figure 7(c), the hook portion 33a and the fixed hook member 34 are disengaged, and the car-side locking mechanism 30 is unlocked. The car-side engaging element 32 stops moving when it comes into contact with the second stopper 46. At this time, the movable-side contact 72 has come out of contact with the fixed-side contact 82, so the rotation of the locking-side hook member 33 does not cause the movable-side contact 72 to interfere with the fixed-side contact 82. This prevents damage to the detection switch 81.

[0078] When the first car-side door 11A further moves in the door-opening direction, the landing-side engaging element 235 is pressed by the car-side engaging element 32. Then, the locking-side hook member 231 of the landing-side locking mechanism 230 rotates about the rotation shaft 232 against the urging force. This unlocks the landing-side locking mechanism 230. As a result, the landing-side doors 211, 211 move in the door-opening direction together with the car-side doors 11A, 11B, and the door-opening operation of the car-side doors 11A, 11B of the car 110 and the landing-side doors 211, 211 of the landing 101 is completed.

[0079] 2-2. At the time of rescue Next, the unlocking operation of the car-side locking mechanism 30 during rescue will be described with reference to FIG. FIG. 8 is an explanatory diagram showing the unlocking operation during rescue.

[0080] In the event of a power outage or other such event, an operator rotates the locking-side hook member 33 of the car-side locking mechanism 30. At this time, if the car doors 11A and 11B have not yet been moved a predetermined distance in the door-opening direction, the hook-side protective portion 76 and the switch-side protective portion 77 overlap vertically, as shown in FIG. 8( a). The movable-side contact 72 is inserted into the fixed-side contact 82. In this state, when the locking-side hook member 33 is rotated, the hook-side protective portion 76 and the switch-side protective portion 77 come into contact with each other, as shown in FIG. 8( b). Therefore, the rotation of the locking-side hook member 33 is restricted. This prevents the locking-side hook member 33 from rotating while the movable-side contact 72 is inserted into the fixed-side contact 82, thereby preventing damage to the detection switch 81.

[0081] Furthermore, the positional relationship between the detection switch 81, the hook-side protective part 76, and the switch-side protective part 77 satisfies the relationship defined by the above-mentioned formula 1. Therefore, even if the locking-side hook member 33 rotates by a small angle α, the movable-side contact 72 can be prevented from interfering with the inner wall surface of the fixed-side contact 82.

[0082] As described above, even during rescue, the locking-side hook member 33 cannot be rotated until the overlap between the hook-side protective part 76 and the switch-side protective part 77 is released, so the worker first moves the car-side doors 11A, 11B in the door-opening direction. Then, once the movable-side contact 72 has come out of the fixed-side contact 82 and the overlap between the hook-side protective part 76 and the switch-side protective part 77 is released, the worker can rotate the locking-side hook member 33. This releases the engagement between the hook part 33a of the locking-side hook member 33 and the hook part 34a of the fixed hook member 34, unlocking the car-side locking mechanism 30.

[0083] Furthermore, the timing at which the locking-side hook member 33 rotates can be adjusted by the overlapping distance between the hook-side protective part 76 and the switch-side protective part 77. Therefore, even if there is variation in the distance T between the landing-side engaging part 235 provided on the landing-side door 211 and the car-side engaging part 32, the locking-side hook member 33 can be rotated at a predetermined timing by adjusting the positional relationship between the hook-side protective part 76 and the switch-side protective part 77. As a result, it is possible to simplify the work of adjusting the arrangement of the multiple landing-side engaging parts 235 provided for each landing in a building structure.

[0084] The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the spirit of the invention as defined in the claims.

[0085] In the above-described embodiment, an example has been described in which the opening of the car is opened and closed by a pair of door sections moving toward and away from each other, but this is not limited to this, and the opening of the car may also be opened and closed by the movement of a single door section.

[0086] Furthermore, although an example in which the car-side locking mechanism 30 is applied as the locking mechanism has been described, the present invention is not limited to this, and the platform-side locking mechanism 230 may also be applied as the locking mechanism.

[0087] Furthermore, although an example has been described in which the switch-side protective part 77 and the hook-side protective part 76 are arranged vertically below the connecting part 33c of the locking-side hook member 33 in the locked state, this is not limitative. For example, the switch-side protective part 77 and the hook-side protective part 76 may be arranged vertically above the connecting part 33c, and the positions at which the switch-side protective part 77 and the hook-side protective part 76 are provided are not particularly limited.

[0088] 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. [Explanation of symbols]

[0089] DESCRIPTION OF SYMBOLS 1...Elevator, 10...Cab, 11A, 11B...Cab side door, 11a...Doorstop side end, 11b...Door pocket side end, 11c...Intermediate portion, 12...Cab side door unit, 13...Cab side door sill, 15...Cab side door rail, 16...Drive unit, 17...Transmission belt, 18...Driven roller, 21A, 21B...Door hanger, 25...Safety shoe, 30...Cab side locking mechanism, 31...Base plate, 31a...Main surface portion, 31b...Rope support surface portion, 32...Cab side engaging element, 33...Locking side hook member, 33a...Hook portion, 33b...Pivoting receiving portion, 33d...Unlocking receiving portion, 34...Fixed hook member, 35...Pivoting shaft, 36...Transmission unit, 37...Transmission pin, 41A, 41B...link member, 71...contact support portion, 72...movable side contact, 75...fixed bracket, 77...switch side protection portion, 76...hook side protection portion, 81...detection switch, 82...fixed side contact, 100...hoistway, 101...landing, 102...doorway, 110...car, 120...hoisting machine, 130...counterweight, 170...rope, 211...landing side door, 212...landing side door unit, 213...landing side door sill, 215...landing side door rail, 230...landing side locking mechanism, 235...landing side engaging element

Claims

1. a door provided at an opening of a car that moves up and down in an elevator shaft provided in the architectural structure or at an entrance and exit of a landing where the car stops in the architectural structure; a locking mechanism that locks the door in an unlockable manner, The locking mechanism is a locking hook member rotatably supported on the door; a fixed hook member that releasably engages with the locking hook member; a detection switch for detecting whether the door is open or closed; a hook side protection portion provided on the locking side hook member; a switch-side protective part that overlaps with the hook-side protective part in the vertical direction in the locked state and restricts the rotational movement of the locking-side hook member when the hook-side protective part abuts against the switch-side protective part; Equipped with The detection switch is a fixed contact provided on a member different from the member on which the locking hook member is provided; a movable contact provided on the locking hook member; Elevator.

2. When the fixed contact and the movable contact are separated from each other, the hook-side protective portion and the switch-side protective portion are no longer overlapped in the vertical direction, allowing the locking-side hook member to rotate. The elevator according to claim 1.

3. The switch-side protection part is fixed to the main body of the detection switch, The movable contact and the hook protection part are fixed to the locking hook member via a fixing bracket.

3. The elevator according to claim 2.

4. The fixed contact is a hole provided in the main body of the detection switch, and an electrode is disposed on the bottom surface of the hole. The movable contact is removably inserted into the fixed contact.

3. The elevator according to claim 2.

5. The fixed contact is a hole recessed along the door opening / closing direction, The overlapping area between the hook-side protective part and the switch-side protective part in the vertical direction in the locked state is set to be longer than the insertion depth of the movable-side contact into the fixed-side contact, and is set to be shorter than the distance between the locking-side hook member and the fixed hook member in the opening / closing direction.

5. The elevator according to claim 4.

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