Elevator

Abstract

This elevator comprises: a building-side door that is provided at an entry / exit of a landing at which a car stops in a building structure; a landing-side lock mechanism that locks the building-side door, in a closed state, in a manner enabling unlocking; and a load increasing mechanism. When the landing-side lock mechanism is unlocked and the building-side door moves toward an opening side in the opening-closing direction, the load increasing mechanism increases a load on the building-side door directed toward the opening side in the opening-closing direction via the landing-side lock mechanism.

Description

elevator

[0001] The present invention relates to an elevator.

[0002] Conventionally, the building-side door on the landing side of an elevator is equipped with a landing-side locking mechanism that locks and unlocks the opening and closing operation to prevent passengers from falling into the elevator shaft. During inspection work, this landing-side locking mechanism is unlocked and the building-side door is opened. In addition, to prevent workers from falling into the elevator shaft, it is necessary to open the building-side door a predetermined distance and then check that the car is stopped in the specified position.

[0003] An example of such a platform-side locking mechanism is described in Patent Document 1. Patent Document 1 describes a technology including a first door locking device and a second door locking device. The first door locking device includes a first hook having a first recessed portion and a first hook receiving portion with which the first recessed portion engages. The second door locking device includes a second hook having a second recessed portion and a second hook receiving portion with which the second recessed portion engages.

[0004] Japanese Patent Application Laid-Open No. 2022-24571

[0005] However, the technology described in Patent Document 1 requires unlocking two door locking devices to unlock the building door during inspection work, which not only makes the unlocking process very complicated but also increases the number of parts. Furthermore, to unlock the second door locking device, the worker must operate an unlocking key. As a result, there is a risk that one of the worker's hands will be occupied during the second stage of opening, making it difficult to safely open the building door.

[0006] In consideration of the above problems, the object of the present invention is to provide an elevator that can safely open the building side door during inspection work.

[0007] To solve the above problems and achieve the object, an elevator includes a building door provided at the entrance of a hall where the elevator car stops in an architectural structure, a hall locking mechanism that locks the building door so that it can be unlocked when it is closed, and a load increasing mechanism. The load increasing mechanism acts on the opening side of the building door in the opening direction relative to the hall locking mechanism. When the hall locking mechanism is unlocked and the building door moves toward the opening side in the opening direction, the load increasing mechanism increases the load on the opening side of the building door in the opening direction via the hall locking mechanism.

[0008] According to the elevator having the above configuration, the building side door can be opened safely during inspection work.

[0009] FIG. 1 is a schematic configuration diagram showing an elevator according to a first embodiment; FIG. 2 is a front view of an elevator entrance according to the first embodiment, as seen from the car side; FIG. 3 is a plan view of the hall-side locking mechanism and the load increasing mechanism in the elevator according to the first embodiment, as seen from above; FIG. 4 is a front view of the hall-side locking mechanism and the load increasing mechanism in the elevator according to the first embodiment; FIG. 5 is a front view of the building-side door in the elevator according to the first embodiment, as seen from above ... FIG. 1 is a front view showing the landing-side locking mechanism and the load increasing mechanism during a closing operation during inspection work in an elevator according to a first embodiment. FIG. 2 is a front view showing the landing-side locking mechanism and the load increasing mechanism during an opening / closing operation of a building-side door in a normal operation in an elevator according to a first embodiment. FIG. 3 is a front view showing the landing-side locking mechanism and the load increasing mechanism in an elevator according to a second embodiment with the building-side door opened by one stage. FIG. 4 is a front view showing the landing-side locking mechanism and the load increasing mechanism in an elevator according to a second embodiment with the building-side door opened by a second stage. FIG. 5 is a front view showing the landing-side locking mechanism and the load increasing mechanism during a closing operation during inspection work in an elevator according to a second embodiment. FIG. 6 is a front view showing the landing-side locking mechanism and the load increasing mechanism during a closing operation during inspection work in an elevator according to a third embodiment. FIG. 7 is a plan view of the landing-side locking mechanism and the load increasing mechanism in an elevator according to a fourth embodiment, viewed from above.Fig. 10 is a front view showing a hall-side locking mechanism and a load increasing mechanism in an elevator according to a fourth embodiment. Fig. 11 is a plan view of a hall-side locking mechanism and a load increasing mechanism in an elevator according to a fifth embodiment, as viewed from above. Fig. 12 is a front view of a hall-side locking mechanism and a load increasing mechanism in an elevator according to a fifth embodiment. Fig. 13 is a plan view of a hall-side locking mechanism and a load increasing mechanism in an elevator according to a sixth embodiment, as viewed from above. Fig. 14 is a front view of a hall-side locking mechanism and a load increasing mechanism in an elevator according to a sixth embodiment.

[0010] An elevator according to an embodiment will be described below with reference to Figures 1 to 22. Note that common members in each figure are given the same reference numerals.

[0011] 1. First Embodiment 1-1. Elevator Configuration First, the configuration of an elevator according to a first embodiment (hereinafter referred to as "this example") will be described with reference to Fig. 1. Fig. 1 is a schematic diagram showing an example of the configuration of an elevator according to this example.

[0012] As shown in Figure 1, elevator 1 of this example moves up and down in hoistway 110 formed within an architectural structure. Elevator 1 includes car 120 for carrying passengers and cargo, rope 130, counterweight 140, hoisting machine 100, and control unit 50. Hoistway 110 is formed within the architectural structure, and a machine room 160 is provided at the top of the hoistway.

[0013] The hoist 100 is disposed in a machine room 160, and raises and lowers the car 120 by winding a rope 130 around it. A deflector wheel 150 on which the rope 130 is mounted is provided near the hoist 100. A control unit 50 is also installed in the machine room 160. The control unit 50 is connected to the car 120 by wire or wirelessly so that information can be transmitted and received.

[0014] The car 120 is connected to a counterweight 140 via a rope 130 and moves up and down in the elevator shaft 110. In addition, entrances and exits 202 for people and objects to enter and exit the car 120 are provided at landings 201 where the car 120 stops on each floor of the building structure.

[0015] The elevator car 120 has a car chamber 121 where people and objects get on and off, a pair of car side doors 124, 124, a car side door unit 122, and a car side door sill 123. An opening is provided on one side of the car chamber 121, and people and objects get in and out through this opening.

[0016] The car-side door unit 122 is provided at the upper end in the vertical direction of the opening of the car chamber 121, and the car-side door sill 123 is provided at the lower end in the vertical direction of the opening of the car chamber 121. The car-side door sill 123 is provided with guide grooves that guide the opening and closing of the pair of car-side doors 124, 124. The pair of car-side doors 124, 124 are supported by the car-side door unit 122 and the car-side door sill 123 so as to be able to open and close. The car-side door 124 is also provided with a car-side engaging element that engages with a landing-side engaging element 34, which will be described later.

[0017] Fig. 2 is a front view showing the entrance / exit 202 of each floor as seen from the car 120 side. As shown in Fig. 2, the entrance / exit 202 is provided with a pair of building-side doors 11, 11, a building-side door unit 12, a building-side door sill 13, a landing-side locking mechanism 30, and a load increasing mechanism 40. The building-side door unit 12 is provided at the upper end of the entrance / exit 202 in the vertical direction, and the building-side door sill 13 is provided at the lower end of the entrance / exit 202 in the vertical direction. The building-side door sill 13 is provided with a guide groove that guides the opening and closing of the pair of building-side doors 11, 11.

[0018] The building door unit 12 includes a building door rail (not shown), a pulley, a transmission belt, a fixed hook member 26, and a load increasing mechanism 40. The building door rail extends parallel to the horizontal direction of the building door unit 12 and in the opening and closing direction of the pair of building doors 11. The pulleys are disposed at both ends of the upper end of the building door unit 12 in the vertical direction. A transmission belt is wound around the pulleys. The transmission belt is formed endless with both longitudinal ends connected. The transmission belt moves cyclically between the two pulleys. At this time, the upper and lower parts of the transmission belt move in opposite directions.

[0019] The fixed hook member 26 is disposed at an intermediate position between the pair of building-side doors 11 when the pair of building-side doors 11 are closed. The fixed hook member 26 engages with a locking-side hook member 31 of a platform-side locking mechanism 30, which will be described later.

[0020] The building door unit 12 is also provided with a load increasing mechanism 40. The load increasing mechanism 40 is disposed at an intermediate position in the opening direction of the building door 11. The detailed configuration of the load increasing mechanism 40 will be described later.

[0021] Furthermore, the pair of building-side doors 11, 11 are each provided with a door hanger 21, 21. The door hanger 21 is provided at the upper end of the building-side door 11 in the vertical direction. When the car 120 stops at any floor, the door hanger 21 of the building-side door 11 faces the door hanger of the car-side door 124. Furthermore, the door hanger 21 is provided with a moving roller that slides on the building-side door rail.

[0022] Furthermore, a connecting member that connects to the transmission belt is provided on the door hanger 21. The connecting member of one door hanger 21 is connected to the lower part of the transmission belt, and the connecting member of the other door hanger 21 is connected to the upper part of the transmission belt. When the transmission belt moves, the pair of building doors 11, 11 move toward each other in a closing direction or away from each other in an opening direction via the connecting member.

[0023] Furthermore, a platform-side locking mechanism 30 is provided on the door hanger 21, of the two door hangers 21, which faces an engaging element provided on the car 120 when the car 120 stops.

[0024] [Landside Locking Mechanism and Load Increasing Mechanism] Next, the detailed configurations of the landside locking mechanism 30 and the load increasing mechanism 40 will be described with reference to Figures 3 and 4. Figure 3 is a plan view of the landside locking mechanism 30 and the load increasing mechanism 40 as viewed from above, and Figure 4 is a front view of the landside locking mechanism 30 and the load increasing mechanism 40.

[0025] 3 and 4, the landing-side locking mechanism 30 has a locking-side hook member 31, a pivot shaft 35, two landing-side engaging members 34, a lever 38, and an abutment portion 39. The locking-side hook member 31 is movably supported by the pivot shaft 35. The locking-side hook member 31 is also provided with two landing-side engaging members 34.

[0026] When the car 120 stops, the two platform-side engaging members 34 are inserted between the two engaging members provided on the car 120. When the car-side door 124 of the car 120 opens or closes, the platform-side engaging members 34 come into contact with the engaging members provided on the car 120. This causes the locking-side hook member 31 to rotate around the rotation shaft 35.

[0027] Furthermore, a hook portion 31a is formed on one end of the locking-side hook member 31 on the closing side in the opening / closing direction. The hook portion 31a engages with a fixed hook member 26 (see FIG. 2) provided on the building-side door unit 12. This causes the landing-side locking mechanism 30 to lock the building-side door 11 in the closed state. When the locking-side hook member 31 rotates around the rotation shaft 35, the engagement between the hook portion 31a and the fixed hook member 26 is released. Note that the position where the fixed hook member 26 is provided is not limited to the building-side door unit 12, and it may be provided on a door hanger 21 of the pair of door hangers 21, 21 that is different from the door hanger 21 on which the locking-side hook member 31 is provided.

[0028] Furthermore, a lever 38 is provided at the other end of the locking side hook member 31 on the opening side in the opening / closing direction. The lever 38 has a first lever piece 38a and a second lever piece 38b. The first lever piece 38a protrudes from the other end of the locking side hook member 31 toward the opening side in the opening / closing direction. The second lever piece 38b is provided contiguous to the end of the first lever piece 38a opposite the locking side hook member 31.

[0029] The second lever piece 38b is bent substantially perpendicularly from the first lever piece 38a and protrudes upward in the vertical direction. That is, the lever 38 is formed substantially in an L-shape. The second lever piece 38b of the lever 38 is positioned so as not to overlap the door hanger 21 when viewed from the front (see FIG. 2). An abutment portion 39 is provided on the end of the second lever piece 38b opposite the first lever piece 38a, i.e., on the top end in the vertical direction.

[0030] The abutment portion 39 protrudes from the second lever piece 38b in a direction perpendicular to both the opening / closing direction and the up-down direction. The abutment portion 39 protrudes from the second lever piece 38b toward the building-side door unit 12. When the locking-side hook member 31 moves toward the opening side in the opening / closing direction without rotating, the abutment portion 39 abuts against the second bracket 42 of the load increasing mechanism 40.

[0031] The load increasing mechanism 40 is disposed closer to the opening side in the opening and closing direction of the building-side door 11 than the hall-side locking mechanism 30 in the closed state. The load increasing mechanism 40 acts on the opening side in the opening and closing direction of the building-side door 11 than the hall-side locking mechanism 40. The load increasing mechanism 40 has a first bracket 41, a second bracket 42, a first pivot shaft 43, a second pivot shaft 44, a first stopper pin 45, a second stopper pin 46, and a biasing member 47.

[0032] The first bracket 41 is formed in a generally flat plate shape. A first pivot shaft 43 is disposed at the upper end of the first bracket 41 in the vertical direction. The first pivot shaft 43 is provided on the building-side door unit 12. The first bracket 41 is rotatably supported by the first pivot shaft 43. A first stopper pin 45 is provided near the lower end of the first bracket 41 in the vertical direction.

[0033] The first stopper pin 45 is provided on the building-side door unit 12. The first stopper pin 45 abuts against the closing side of the first bracket 41 in the opening and closing direction. The first stopper pin 45 restricts the movement of the lower end of the first bracket 41 toward the closing side in the opening and closing direction. In other words, the first stopper pin 45 restricts the first bracket 41 from rotating clockwise, which is the first rotation direction.

[0034] A second rotation shaft 44 and a second stopper pin 46 are provided at the lower end of the first bracket 41. The second bracket 42 is rotatably supported on the second rotation shaft 44. Therefore, the second bracket 42 is rotatably supported on the first bracket 41 via the second rotation shaft 44.

[0035] The second bracket 42 is formed in a generally flat plate shape. As described above, the upper end of the second bracket 42 in the vertical direction is rotatably supported by the second rotation shaft 44. The lower end of the second bracket 42 protrudes downward in the vertical direction from the first bracket 41. Furthermore, the lower end of the second bracket 42 on the closing side in the opening / closing direction is inclined upward in the vertical direction.

[0036] A second stopper pin 46 provided on the first bracket 41 is disposed near the upper end of the second bracket 42. The second stopper pin 46 abuts against the closing side of the second bracket 42 in the opening / closing direction. The second stopper pin 46 restricts the movement of the lower end of the second bracket 42 toward the opening side in the opening / closing direction. In other words, the second stopper pin 46 restricts the counterclockwise rotation of the second bracket 42, which is the second rotation direction.

[0037] A spring bearing portion 48 is fixed to the end of the lower end of the second bracket 42 on the opening side in the opening / closing direction. One end of a biasing member 47 is fixed to the spring bearing portion 48. The biasing member 47 is formed, for example, by a coil spring. The other end of the biasing member 47 is fixed to a fixed-side spring bearing portion 49. The fixed-side spring bearing portion 49 is fixed to the building-side door unit 12 on the opening side in the opening / closing direction relative to the second bracket 42. The biasing member 47 biases the second bracket 42 toward the closing side in the opening / closing direction, i.e., the second bracket 42 clockwise.

[0038] 1-2. Operational Example Next, the opening and closing operation of the building-side door 11 in the elevator 1 having the above-described configuration will be described with reference to Figures 5 to 11. First, the opening and closing operation of the building-side door 11 during inspection work will be described with reference to Figures 5 to 8. Figure 5 is a front view showing the building-side door 11 in a state where it is opened one stage.

[0039] First, the worker inserts the unlocking key into the building-side door unit 12 from the landing 201 side and lifts the locking-side hook member 31 of the landing-side locking mechanism 30. This causes the locking-side hook member 31 to rotate about the rotation shaft 35, disengaging the hook portion 31a of the locking-side hook member 31 from the fixed hook member 26. Next, the worker moves the building-side door 11 toward the opening side in the opening / closing direction. This allows the building-side door 11 to be opened one step, as shown in FIG. 5. At this time, the unlocking key is withdrawn from the building-side door unit 12, and the locking-side hook member 31 returns to its initial position.

[0040] The distance between the pair of building-side doors 11, 11 when the building-side doors 11 are open one step is such that a person cannot enter the elevator shaft 110 from the platform 201. When the building-side doors 11 are open one step, the inside of the elevator shaft 110 can be checked from the platform 201. As a result, it can be confirmed that the car 120 is stopped at a predetermined position, and workers can be prevented from falling into the elevator shaft 110.

[0041] 6 and 7 are diagrams showing the landing-side locking mechanism 30 and the load increasing mechanism 40 when the building-side door 11 is opened by one stage. As shown in FIGS. 6 and 7 , when the building-side door 11 is opened by one stage, the abutment portion 39 provided on the lever 38 of the landing-side locking mechanism 30 abuts against the lower end of the second bracket 42 of the load increasing mechanism 40. A biasing member 47 that biases the building-side door 11 toward the closing side is provided on the opening side of the second bracket 42 in the opening / closing direction. Therefore, after the building-side door 11 is opened by one stage, the load for opening the building-side door 11 is increased by the biasing member 47 of the load increasing mechanism 40. The worker moves the building-side door 11 toward the opening side in the opening / closing direction against the biasing force of the biasing member 47.

[0042] 8 is a diagram showing the landing-side locking mechanism 30 and the load increasing mechanism 40 when the building-side door 11 is in the second stage of opening. When an operator moves the building-side door 11 toward the opening side in the opening / closing direction against the biasing force of the biasing member 47, the second bracket 42 attempts to rotate counterclockwise around the second pivot shaft 44. However, the upper end of the second bracket 42 abuts against the second stopper pin 46 provided on the first bracket 41. Therefore, as shown in FIG. 8 , the second bracket 42 becomes one with the first bracket 41 and rotates counterclockwise around the first pivot shaft 43.

[0043] Then, the load on the building-side door 11 in the opening direction is increased by the biasing member 47 until the abutment portion 39 provided on the lever 38 of the landing-side locking mechanism 30 is released from contact with the second bracket 42. When the abutment portion 39 provided on the lever 38 of the landing-side locking mechanism 30 is released from contact with the second bracket 42, the second stage of the opening operation is completed, and the opening operation of the building-side door 11 during inspection work is completed.

[0044] During this second-stage opening operation, the unlocking key is removed from the building-side door unit 12. That is, in the elevator 1 of this example, the second-stage opening operation of the building-side door 11 does not require an unlocking operation. Therefore, the worker can open and close the building-side door 11 with both hands free. As a result, the building-side door 11 can be opened safely during inspection work.

[0045] Furthermore, since the building-side door 11 only needs to be provided with the platform-side locking mechanism 30 that locks the first step, the number of parts can be reduced.

[0046] After completing the inspection, the worker closes the building door 11. Figures 9 and 10 are diagrams showing the platform-side locking mechanism 30 and the load-increasing mechanism 40 during the closing operation during inspection. As shown in Figure 9 , when the building door 11 is moved toward the closing side in the opening / closing direction, the abutment portion 39 provided on the lever 38 of the platform-side locking mechanism 30 approaches the second bracket 42. When the building door 11 is further moved toward the closing side in the opening / closing direction, the abutment portion 39 abuts against the second bracket 42. When the building door 11 is further moved toward the closing side in the opening / closing direction in this state, the second bracket 42 is pressed by the abutment portion 39 and rotates clockwise around the second rotation shaft 44, as shown in Figure 10 . At this time, the biasing member 47 connected to the second bracket 42 is stretched by the rotation of the second bracket 42. The first bracket 41 does not rotate because it abuts against the first stopper pin 45 .

[0047] As described above, the lower end of the second bracket 42 has an end on the closing side in the opening / closing direction that is inclined upward in the vertical direction. Therefore, during the closing operation, the second bracket 42 can be smoothly released from contact with the contact portion 39. Then, the worker moves the building-side door 11 until the hook portion 31a of the locking-side hook member 31 of the hall-side locking mechanism 30 engages with the fixed hook member 26. When the hook portion 31a engages with the fixed hook member 26, the hall-side locking mechanism 30 locks, and the closing operation of the building-side door 11 is completed.

[0048] Next, the opening and closing operation of the building-side door 11 during normal operation will be described with reference to FIG. 11 . FIG. 11 is a diagram showing the hall-side locking mechanism 30 and the load increasing mechanism 40 during the opening and closing operation of the building-side door 11 during normal operation. During normal operation, when the car 120 stops, the two hall-side engaging members 34 of the hall-side locking mechanism 30 are inserted between the two engaging members provided on the car 120. When the car-side door 124 of the car 120 opens or closes, the hall-side engaging members 34 abut against the engaging members provided on the car 120. This causes the locking-side hook member 31 to rotate about the rotation shaft 35. As the locking-side hook member 31 rotates, the engagement between the hook portion 31 a and the fixed hook member 26 is released.

[0049] Furthermore, the building-side door 11 moves in the opening and closing direction together with the car-side door 124. Therefore, as shown in FIG. 11 , the locking-side hook member 31 of the hall-side locking mechanism 30 moves while rotating about the rotation shaft 35. Therefore, during normal opening and closing operations, the abutment portion 39 provided on the lever 38 does not come into contact with the second bracket 42 of the load increasing mechanism 40. As a result, during normal operation, the biasing force of the biasing member 47 of the load increasing mechanism 40 is not transmitted to the building-side door 11. As a result, during normal operation, the load increasing mechanism 40 does not operate, and the building-side door 11 can be opened and closed smoothly.

[0050] 2. Second Embodiment Next, an elevator according to a second embodiment will be described with reference to Figures 12 to 15. Figures 12 to 15 are diagrams showing the hall-side locking mechanism and the load increasing mechanism according to the second embodiment.

[0051] The hall-side locking mechanism and load increasing mechanism according to the second embodiment differ from those according to the first embodiment in the configuration of the load increasing mechanism, and therefore, parts common to those according to the first embodiment are designated by the same reference numerals and redundant explanations will be omitted.

[0052] 12, the load increasing mechanism 40B has a first bracket 41B, a second bracket 42, a first rotating shaft 43B, a second rotating shaft 44, a first stopper pin 45B, a second stopper pin 46B, and a biasing member 47. In the load increasing mechanism 40B according to the second embodiment, the first bracket 41B is disposed parallel to the opening / closing direction.

[0053] One end of the first bracket 41B on the opening side in the opening / closing direction is rotatably supported by a first rotating shaft 43B. A second rotating shaft 44 and a second stopper pin 46B are provided at the other end of the first bracket 41B on the opening side in the opening / closing direction. A second bracket 42 is rotatably supported by the second rotating shaft 44.

[0054] A first stopper pin 45B is provided at the bottom in the up-down direction at one end of the first bracket 41B on the opening side in the opening / closing direction. The first stopper pin 45B restricts the first bracket 41B from rotating downward in the up-down direction. In other words, the first stopper pin 45B restricts the first bracket 41B from rotating clockwise.

[0055] The other configurations are the same as those of the load increasing mechanism 40 according to the first embodiment, and therefore the description thereof will be omitted.

[0056] During inspection work, when the first stage of opening of the building-side door 11 is completed, the abutment portion 39 abuts against the second bracket 42, as shown in Fig. 12. In this state, when the building-side door 11 is moved toward the opening side in the opening / closing direction against the biasing force of the biasing member 47, the second bracket 42 rotates together with the first bracket 41 around the first rotation shaft 43B, as shown in Fig. 13.

[0057] Furthermore, when the building-side door 11 is closed during inspection work, the abutment portion 39 approaches the second bracket 42, as shown in Fig. 14 . When the building-side door 11 is further moved toward the closing side in the opening / closing direction, the abutment portion 39 abuts against the second bracket 42. When the building-side door 11 is further moved toward the closing side in the opening / closing direction in this state, the second bracket 42 is pressed by the abutment portion 39 and rotates clockwise around the second rotation shaft 44, as shown in Fig. 15 . At this time, the biasing member 47 connected to the second bracket 42 is stretched by the rotation of the second bracket 42. Note that the first bracket 41B does not rotate because it abuts against the first stopper pin 45B.

[0058] The other configurations are the same as those of the elevator 1 according to the first embodiment described above, and therefore a description thereof will be omitted. An elevator having such a load increasing mechanism 40B can also obtain the same functions and effects as those of the elevator 1 according to the first embodiment described above.

[0059] In the load increasing mechanism 40B according to this second embodiment, the amount of rotation of the first bracket 41B during inspection operation can be made smaller than the amount of rotation of the first bracket 41 of the load increasing mechanism 40 according to the first embodiment.

[0060] 3. Third Embodiment Next, an elevator according to a third embodiment will be described with reference to Fig. 16. Fig. 16 is a diagram showing a hall-side locking mechanism and a load increasing mechanism according to the third embodiment.

[0061] The hall-side locking mechanism and the load increasing mechanism according to the third embodiment are obtained by changing the location of the biasing member 47 in the load increasing mechanism 40B according to the second embodiment. Therefore, parts common to the hall-side locking mechanism 30 and the load increasing mechanism 40 according to the first embodiment are designated by the same reference numerals, and redundant explanations will be omitted.

[0062] 16, the load increasing mechanism 40C has a first bracket 41C, a second bracket 42, a first rotating shaft 43C, a second rotating shaft 44, a first stopper pin 45C, a second stopper pin 46C, and a biasing member 47C. The first bracket 41C according to the third embodiment is disposed parallel to the opening / closing direction, similar to the first bracket 41B according to the second embodiment.

[0063] Furthermore, a spring bearing portion 48C is fixed to the top end of the first bracket 41C on the closing side in the opening / closing direction. One end of a biasing member 47C is fixed to the spring bearing portion 48C. The other end of the biasing member 47C is fixed to a fixed-side spring bearing portion 49C. The fixed-side spring bearing portion 49C is disposed above the first bracket 41C in the up-down direction. The biasing member 47C biases the first bracket 41C downward in the up-down direction, i.e., in a clockwise direction.

[0064] During inspection work, when the building-side door 11 is opened one stage, the abutment portion 39 abuts against the second bracket 42. When the building-side door 11 is moved toward the opening side in the opening / closing direction, the second bracket 42 becomes one with the first bracket 41C and rotates counterclockwise around the first rotation shaft 43C. Because the biasing member 47C biases the first bracket 41C clockwise, the load on the building-side door 11 in the opening direction increases.

[0065] Furthermore, in the load increasing mechanisms 40 and 40B according to the first and second embodiments described above, the biasing member 47 is stretched by the shear that rotates the second bracket 42 during the closing operation during inspection work. In contrast, in the load increasing mechanism 40C according to the third embodiment, the biasing member 47C is provided on the first bracket 41C. During the closing operation, the second bracket 42 rotates, but the first bracket 41C does not rotate. Therefore, during the closing operation, the biasing member 47C does not affect the rotation of the second bracket 42. As a result, the load increasing mechanism 40C according to the third embodiment allows the building door 11 to be closed smoothly during inspection work.

[0066] In the load increasing mechanism 40C according to the third embodiment, the biasing member 47C is at its natural length in the state shown in Figure 16. When the biasing force is strong enough, the first bracket 41C does not rotate during the closing operation even without the first stopper pin 45C, and only the second bracket 42D rotates. In such a case, the first stopper pin may be omitted.

[0067] The other configurations are the same as those of the elevator 1 according to the first embodiment described above, and therefore a description thereof will be omitted. An elevator having such a load increasing mechanism 40C can also achieve the same functions and effects as those of the elevator 1 according to the first embodiment described above.

[0068] 4. Fourth Embodiment Next, an elevator according to a fourth embodiment will be described with reference to Figures 17 and 18. Figures 17 and 18 are diagrams showing the hall-side locking mechanism and the load increasing mechanism according to the fourth embodiment.

[0069] The hall-side locking mechanism and the load increasing mechanism according to the fourth embodiment are obtained by changing the location of the biasing member 47 in the load increasing mechanism 40 according to the first embodiment. Therefore, parts common to the hall-side locking mechanism 30 and the load increasing mechanism 40 according to the first embodiment are given the same reference numerals, and redundant explanations will be omitted.

[0070] As shown in Figures 17 and 18, the load increasing mechanism 40D has a first bracket 41D, a second bracket 42D, a first rotating shaft 43D, a second rotating shaft 44D, a first stopper pin 45D, a second stopper pin 46D, and a biasing member 47D.

[0071] A spring bearing portion 48D is fixed to the lower end of the first bracket 41D in the up-down direction, at the end on the opening side in the opening / closing direction. One end of a biasing member 47D is fixed to the spring bearing portion 48D. The other end of the biasing member 47D is fixed to a fixed-side spring bearing portion 49D. The fixed-side spring bearing portion 49D is fixed to the building-side door unit 12 on the opening side of the first bracket 41D in the opening / closing direction. The biasing member 47D biases the first bracket 41D toward the closing side in the opening / closing direction, i.e., in a clockwise direction.

[0072] In the load increasing mechanism 40D according to the fourth embodiment, similar to the load increasing mechanism 40C according to the third embodiment, the biasing member 47D increases the load on the building door 11 in the opening direction via the first bracket 41D during the opening operation during inspection work. Furthermore, during the closing operation, the second bracket 42D rotates, but the first bracket 41D does not rotate. Therefore, during the closing operation, the biasing member 47D does not affect the rotation of the second bracket 42D. As a result, similar to the load increasing mechanism 40C according to the third embodiment, the load increasing mechanism 40D according to the fourth embodiment allows the building door 11 to be closed smoothly during inspection work.

[0073] In the load increasing mechanism 40D according to the fourth embodiment, the biasing member 47D is at its natural length in the state shown in Figures 17 and 18. When the biasing force is strong enough, the first bracket 41D does not rotate during the closing operation even without the first stopper pin 45D, and only the second bracket 42D rotates. In such a case, the first stopper pin may be omitted.

[0074] The other configurations are the same as those of the elevator 1 according to the first embodiment described above, and therefore a description thereof will be omitted. An elevator having such a load increasing mechanism 40D can also obtain the same functions and effects as those of the elevator 1 according to the first embodiment described above.

[0075] 5. Fifth Embodiment Next, an elevator according to a fifth embodiment will be described with reference to Figures 19 and 20. Figures 19 and 20 are diagrams showing the hall-side locking mechanism and the load increasing mechanism according to the fifth embodiment.

[0076] The load increasing mechanism according to the fifth embodiment differs from the load increasing mechanism 40 according to the first embodiment in that a magnetic force is used as the force that increases the load during the closing operation. Therefore, parts that are common to the hall-side locking mechanism 30 and the load increasing mechanism 40 according to the first embodiment are assigned the same reference numerals, and redundant explanations will be omitted.

[0077] The load increasing mechanism 40E has a first bracket 41E, a second bracket 42E, a first rotating shaft 43E, a second rotating shaft 44E, a first stopper pin 45E, a second stopper pin 46E, a first magnet 51 and a second magnet 53.

[0078] The configurations of the first bracket 41E, the second bracket 42E, the first rotating shaft 43E, the second rotating shaft 44E, the first stopper pin 45E, and the second stopper pin 46E are the same as those of the load increasing mechanism 40D in the fourth embodiment, and therefore will not be described here.

[0079] 19 and 20 , a second magnet 53 is provided at the lower end of the first bracket 41E in the vertical direction, at the end on the closing side in the opening / closing direction. The first magnet 51 is fixed to the building-side door unit 12 via a bracket 52. The first magnet 51 is disposed opposite the second magnet 53. The first magnet 51 magnetically attracts the second magnet 53, thereby biasing the first bracket 41E in a clockwise direction. That is, during the opening operation for inspection work, the magnetic attractive force acting on the first magnet 51 and the second magnet 53 increases the load on the building-side door 11 in the opening direction.

[0080] In this example, the second magnet 53 is provided on the first bracket 41E, but this is not limiting and any magnetic material may be used as long as it can be attracted by the first magnet 51. Alternatively, the second magnet 53 or magnetic material may be provided on the second bracket 42E, and the first magnet 51 may be positioned opposite the second magnet 53 or magnetic material.

[0081] The other configurations are the same as those of the elevator 1 according to the first embodiment described above, and therefore a description thereof will be omitted. An elevator having such a load increasing mechanism 40E can also obtain the same functions and effects as those of the elevator 1 according to the first embodiment described above.

[0082] 6. Sixth Embodiment Next, an elevator according to a sixth embodiment will be described with reference to Figures 21 and 22. Figures 21 and 22 are diagrams showing the hall-side locking mechanism and the load increasing mechanism according to the sixth embodiment.

[0083] The load increasing mechanism and hall-side locking mechanism according to the sixth embodiment differ from the load increasing mechanism 40 according to the first embodiment in that a frictional force is used as the force that increases the load during the closing operation. Therefore, parts that are common to the hall-side locking mechanism 30 and the load increasing mechanism 40 according to the first embodiment are assigned the same reference numerals and redundant explanations will be omitted.

[0084] 21 and 22 , the load increasing mechanism 40F has a shoe 61 and friction members 71, 71. The shoe 61 is fixed to the upper end of the second lever piece 38b of the lever 38 of the hall-side locking mechanism 30. The friction member 71 is disposed at a position that comes into contact with the shoe 61 when the building-side door 11 is opened by one stage. The load increasing mechanism 40F increases the load in the opening direction of the building-side door 11 by the friction force generated when the shoe 61 and the friction member 71 come into contact with each other.

[0085] Furthermore, during normal operation, the locking-side hook member 31 of the hall-side locking mechanism 30 rotates, so the shoe 61 does not come into contact with the friction member 71. As a result, during normal operation, the frictional force generated by contact between the shoe 61 and the friction member 71 in the load increasing mechanism 40F is not transmitted to the building-side door 11.

[0086] The other configurations are the same as those of the elevator 1 according to the first embodiment described above, and therefore a description thereof will be omitted. An elevator having such a load increasing mechanism 40F can also obtain the same functions and effects as those of the elevator 1 according to the first embodiment described above.

[0087] The present invention is not limited to the embodiments described above and shown in the drawings, and various modifications can be made within the scope of the invention as set forth in the claims.

[0088] Furthermore, the configuration of the elevator 1 is not limited to the 1:1 roping elevator shown in Figure 1, but can be applied to various other elevators such as 2:1 roping elevators and hydraulic elevators. It can also be applied to machine room elevators.

[0089] 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.

[0090] DESCRIPTION OF SYMBOLS 1...Elevator, 11...Building side door, 12...Building side door unit, 13...Building side door sill, 21...Door hanger, 26...Fixed hook member, 30...Landing side locking mechanism, 31...Locking side hook member, 31a...Hook portion, 34...Landing side engaging element, 35...Pivoting shaft, 38...Lever, 38a...First lever piece, 38b...Second lever piece, 39...Abutment portion, 40, 40B, 40C, 40D, 40E, 40F...Load increasing mechanism, 41, 41B, 41C, 41D, 41E...First bracket, 42, 42D, 42E...Second bracket, 43, 43B, 43C, 43D, 43E...First pivoting shaft, 44, 44D, 44E...Second pivoting shaft, DESCRIPTION OF SYMBOLS 45, 45B, 45C, 45D, 45E...First stopper pin, 46, 46B, 46C, 46D, 46E...Second stopper pin, 47, 47C, 47D...Using member, 51...First magnet, 52...Bracket, 53...Second magnet, 61...Shoe, 71...Friction member, 100...Hoistway, 110...Hoistway, 120...Cab, 121...Cab room, 122...Cab side door unit, 123...Cab side door sill, 124...Cab side door, 130...Rope, 160...Machine room, 201...Landing area, 202...Entrance / exit

Claims

1. An elevator comprising: a building-side door provided at an entrance of a landing where a car in a building structure stops; a landing-side locking mechanism that locks the building-side door in a closed state and can be unlocked; and a load increasing mechanism that acts on the opening side in the opening / closing direction of the building-side door rather than the landing-side locking mechanism, wherein the load increasing mechanism increases the load on the opening side in the opening / closing direction of the building-side door via the landing-side locking mechanism when the landing-side locking mechanism is unlocked and the building-side door moves to the opening side in the opening / closing direction.

2. The elevator according to claim 1, wherein the landing-side locking mechanism includes: a rotating shaft provided on the building-side door; a locking-side hook member rotatably supported by the rotating shaft; a fixed hook member that engages with the locking-side hook member in an unlockable manner; and a lever provided on the locking-side hook member, and the load increasing mechanism increases the load on the opening side in the opening / closing direction of the building-side door via the lever.

3. The elevator according to claim 2, wherein the load increasing mechanism includes: a first rotating shaft provided on a building-side door unit provided at the entrance; a first bracket rotatably supported by the first rotating shaft; a second rotating shaft provided on the first bracket; and a second bracket rotatably supported by the second rotating shaft, and the lever is provided with a contact portion that contacts the second bracket when the landing-side locking mechanism is unlocked and the building-side door moves to the opening side in the opening / closing direction.

4. The elevator according to claim 3, wherein the load increasing mechanism includes: a first stopper pin that restricts rotation in a first rotation direction in the first bracket or a biasing member that restricts rotation in the first rotation direction; and a second stopper pin provided on the first bracket that restricts rotation in a second direction opposite to the first rotation direction in the second bracket, and the second bracket rotates in the second direction together with the first bracket when the building-side door moves to the opening side in the opening / closing direction and contacts the contact portion.

5. The elevator according to claim 4, wherein the load increasing mechanism includes a biasing member that biases the first bracket and the second bracket in the first rotation direction.

6. The elevator according to claim 5, wherein the biasing member is connected to the first bracket.

7. The load increasing mechanism has a magnet, and biases the first bracket and the second bracket in the first rotation direction by a magnetic attraction force of the magnet. The elevator according to claim 4.

8. The load increasing mechanism includes a shoe provided on the lever, and a friction member that contacts the shoe when the landing side locking mechanism is unlocked and the building side door moves to the opening side in the opening / closing direction, and increases the load on the building side door in the opening side direction of the opening / closing direction by the frictional force between the shoe and the friction member. The elevator according to claim 2.