JP7388598B2 - elevator door device - Google Patents

Description

The present disclosure relates to an elevator door device.

Conventional elevators have a hoist installed at the top of the hoistway to move the car. The hoist has a drive sheave, a hoist motor, and a hoist brake. A suspension body is wound around the drive sheave, and a cage is connected to one end of the suspension body, and a counterweight is connected to the other end of the suspension body. The hoist motor moves the car by rotating a drive sheave. The hoist brake stops the car by braking the rotation of the drive sheave (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2018-105109

In the conventional elevator described above, the hoisting machine brake brakes the rotation of the drive sheave to stop the car. When the car stops, the user gets into the car. When an elevator is installed in a high-rise building, etc., and the hoistway is long, even if the car is stopped by the hoisting machine brake, the suspension body may repeatedly expand and contract as the elevator user gets into the car. be. As a result, there was a problem in that the car pitched and swayed, giving the user a sense of discomfort.

The present disclosure has been made to solve the above-mentioned problems, and aims to suppress pitching of the car when a user of the elevator gets into the car.

An elevator door device according to the present disclosure includes a car door that opens and closes a car entrance, a first plate member provided on the car door and attached along the moving direction of the car, and a first plate member provided on the car door, A second plate is attached to the door-opening side of the first plate along the direction of movement of the car, and is displaced to narrow the distance from the first plate when the car door opens, and a second plate to open and close the landing entrance. a landing door fixed to the landing door and moved by being pushed by a first plate or a second plate , the outer diameter of which is fixed to the landing door when the car door is open; A first roller smaller than the interval between the first plate material and the second plate material is attached to a latch that is provided on the landing door and locks the landing door, and is more deformable than the first roller and has an outer diameter that is smaller than that of the car. The distance between the first plate and the second plate is smaller than the distance between the first plate and the second plate when the door is closed, and the latch is unlocked by being pushed toward the door opening side by the first plate, and the car door and landing door are opened. a second roller that is held by a first plate member and a second plate member and elastically deforms when the car door is closed; It is larger than the outer diameter of roller 1 .

According to the present disclosure, it is possible to obtain an elevator door device that can suppress pitching of a car when a user of the elevator gets into the car.

1 is a side view of an elevator using the elevator door device in Embodiment 1. FIG. 1 is a front view showing an elevator door device in Embodiment 1. FIG. FIG. 3 is a front view of the elevator door device according to the first embodiment when the elevator door device is performing a door opening operation. FIG. 3 is a front view of the landing door in Embodiment 1, viewed from the hoistway side. FIG. 2 is an enlarged front view of the interlock device according to the first embodiment. FIG. 2 is an enlarged front view of the interlock device when the landing door is unlocked in Embodiment 1; 3 is a side view of movable interlock roller 30 in Embodiment 1. FIG. 3 is a graph showing changes over time in pitching of a car when the elevator door device according to Embodiment 1 is used. 2 is a graph showing changes over time in pitching of a car when the movable interlock roller of the elevator door device in Embodiment 1 is changed. FIG. 3 is a front view showing another example of the elevator door device according to the first embodiment.

Embodiment 1.
FIG. 1 is a side view of an elevator using the elevator door device according to the first embodiment. In the figure, a machine room 101 is provided above a hoistway 100. A hoisting machine 102, a deflection wheel 103, and an elevator control device 104 are installed in the machine room 101. The hoist 102 includes a drive sheave 105, a hoist motor (not shown) that rotates the drive sheave 105, and a hoist brake (not shown) that brakes the rotation of the drive sheave 105. There is.

A suspension body 106 is wound around the drive sheave 105 and the deflection wheel 103. As the suspension body 106, a plurality of ropes or a plurality of belts are used. The car 1 is connected to a first end of the suspension body 106. A counterweight 107 is connected to the second end of the suspension body 106.

The car 1 and the counterweight 107 are suspended in the hoistway 100 by a suspension body 106, and are moved up and down in the hoistway 100 by the driving force of the hoist 102. Elevator control device 104 controls the operation of car 1 by controlling hoist 102 .

Inside the hoistway 100, a pair of car guide rails (not shown) for guiding the elevator car 1 up and down, and a pair of counterweight guide rails (not shown) for guiding the elevator lift 107 are installed. has been done.

The car 1 includes a car frame 108 to which a suspension body 106 is connected, and a car chamber 109 supported by the car frame 108. A pair of car doors 5 are provided on the front surface of the car room 109 to open and close the car entrance by sliding horizontally in opposite directions.

A pair of landing doors 55 that open and close the entrance/exit of the landing by sliding horizontally in opposite directions to each other are provided in the landing of multiple floors. The landing door 55 opens and closes in conjunction with the car door 5 when the car 1 lands on the floor.

FIG. 2 is a front view showing an elevator door device according to Embodiment 1 of the present invention. Note that FIG. 2 is a front view of the car 1 when viewed from the landing side. In FIG. 2, a car 1 moving in a hoistway 100 is provided with a car entrance 2. Furthermore, a car door frame 3 disposed above the car entrance 2 is fixed to the car 1. A car side door rail 4 along the frontage direction of the car entrance 2 is fixed to the lower part of the car door frame 3.

A pair of car doors 5 for opening and closing the car entrance 2 are suspended from the car side door rail 4. Each car door 5 has a door panel 6 and a car door hanger 7 fixed to the upper part of the door panel 6 and hung on the car side door rail 4. The car door 5 is movable in the frontage direction (horizontal direction) of the car entrance 2 while being guided by the car side door rail 4. The car entrance 2 is opened and closed by moving the door 5 of each car toward the frontage of the car entrance 2.

A door drive device 8 is fixed to the upper part of the car door frame 3. The door drive device 8 has a door drive device main body 9 including a motor, and a drive pulley 10 rotated by the driving force of the door drive device main body 9.

A first driven pulley 11 and a transmission pulley (not shown), which are rotated together, are coaxially provided at one end of the car door frame 3. A second driven pulley 12 is provided at the other end of the car door frame 3. An endless drive belt 13 is wound between the drive pulley 10 and the transmission pulley, and an endless door belt 14 is wound between the first and second driven pulleys 11 and 12. The first driven pulley 11 is rotated by the rotation of the drive pulley 10. The door belt 14 is rotated by rotation of the first driven pulley 11. The second driven pulley 12 is rotated by the rotation of the door belt 14.

The door 5 of each car is connected to the door belt 14 via connection fittings 15 and 16, respectively. The connecting fitting 15 is attached to the car door hanger 7 of one car door 5, and the connecting fitting 16 is attached to the car door hanger 7 of the other car door 5. The doors 5 of each car are moved in opposite directions by the rotation of the door belt 14.

A fixed blade 19 that is a first plate material and a movable blade 21 that is a second plate material are attached to the door panel 6. The fixed blade 19 and the movable blade 21 are arranged along the moving direction (vertical direction) of the car 1, respectively. Furthermore, the fixed blade 19 and the movable blade 21 are provided at positions facing interlock rollers 29 and 30 provided at a landing door 55, which will be described later.

The fixed blade 19 is arranged closer to the door closing side than the movable blade 21 and interlock rollers 29 and 30, which will be described later. The movable blade 21 is arranged closer to the door opening side than the fixed blade 19 and interlock rollers 29 and 30. That is, the fixed blade 19, interlock rollers 29 and 30, and movable blade 21 are arranged in this order from the door closing side. There is a desired gap between the fixed blade 19 and the movable blade 21 for the interlock rollers 29, 30 to enter. Therefore, when the car 1 is stopped at a landing on a floor, the interlock rollers 29 and 30 are in a state between the fixed blade 19 and the movable blade 21.

The movable blade 21 moves between a release position where the distance from the fixed blade 19 is a predetermined distance in the frontage direction (horizontal direction) of the car entrance 2 and a gripping position where the distance from the fixed blade 19 is narrower than the release position. It is movable. FIG. 2 shows a state in which the car door 5 is closed and the movable blade 21 is in the released position. FIG. 3 shows a state in which the car door 5 is open and the movable blade 21 is in the gripping position. The movable blade 21 is displaced in accordance with the rotation of the drive link 20.

When the movable blade 21 is in the gripping position, the movable interlock roller 30 is gripped between the fixed blade 19 and the movable blade 21. At this time, the fixed interlock roller 29 is in contact only with the fixed blade 19 and not with the movable blade 21. The movable interlock roller 30 is released from being held between the fixed blade 19 and the movable blade 21 by moving the movable blade 21 to the release position.

The drive link 20 is rotatable around a first panel attachment shaft (link support shaft) 23 provided on the door panel 6. The driven link 22 is rotatable about a second panel attachment shaft 24 provided on the door panel 6.

The first and second panel mounting shafts 23 and 24 are spaced apart from each other in the vertical direction. Further, the first and second panel mounting shafts 23 and 24 are arranged closer to the door opening side than the fixed blade 19. The respective axes of the first and second panel mounting shafts 23 and 24 are perpendicular to the panel surface of the door panel 6.

An intermediate portion of the drive link 20 is attached to the first panel attachment shaft 23 . A blade attachment shaft 25 is provided at one end of the drive link 20, and a link connection shaft 26 is provided at the other end of the drive link 20. In this example, the drive link 20 has a bent shape bent at the position of the first panel attachment shaft 23.

The blade attachment shaft 25 is located closer to the door closing side than the first panel attachment shaft 23, and the link connection shaft 26 is located closer to the door opening side than the first panel attachment shaft 23. The blade attachment axis 25 and the link connection axis 26 are arranged parallel to the first panel attachment axis 23, respectively.

One end of the driven link 22 is attached to the second panel attachment shaft 24 . A blade attachment shaft 27 is provided at the other end of the driven link 22 . The blade attachment axis 27 is arranged parallel to the second panel attachment axis 24.

The movable blade 21 is rotatably attached to each blade attachment shaft 25, 27. The movable blade 21 is attached to each of the blade attachment shafts 25 and 27, so that the movable blade 21 is placed closer to the fixed blade 19 than the first and second panel attachment shafts 23 and 24. The distance between each blade mounting shaft 25, 27 is the same as the distance between the first and second panel mounting shafts 23, 24. Further, the distance between the blade mounting shaft 25 and the first panel mounting shaft 23 is the same as the distance between the blade mounting shaft 27 and the second panel mounting shaft 24. Therefore, the movable blade 21 is displaced by the rotation of the drive link 20 while remaining parallel to the fixed blade 19.

As shown in FIG. 3, when the movable blade 21 is in the gripping position, the direction of the straight line connecting the first panel mounting shaft 23 and the blade mounting shaft 25 is the same as the moving direction of the car door 5. Furthermore, a stopper 28 is fixed to the door panel 6 to restrict displacement of the movable blade 21. Stop 28 receives drive link 20 when movable blade 21 reaches the gripping position. This prevents the movable blade 21 from passing past the gripping position.

The movable blade 21 is displaced to the gripping position by rotating the drive link 20 by the weight of the movable blade 21 or by the action of a spring force. Further, the movable blade 21 is displaced to the release position by the drive link 20 being rotated by the driving force of the gripping drive device 33 against the self-weight of the movable blade 21 or the action of the spring force.

The gripping drive device 33 is fixed to the car door frame 3 with a rotating lever 34 rotatably attached to the car door hanger 7, a connecting rod 35 that interlocks the rotating lever 34 and the drive link 20 with each other, It has a cam 36 that rotates a rotation lever 34 that is moved together with the car door 5.

The rotating lever 34, fixed blade 19, drive link 20, movable blade 21 and driven link 22 are attached to the common car door 5. Further, the rotation lever 34 is rotatable around a hanger attachment shaft 37 provided on the car door hanger 7. The hanger mounting shaft 37 is arranged parallel to the first panel mounting shaft 23. In this example, the shape and size of the pivot lever 34 are the same as the shape and size of the drive link 20.

An intermediate portion of the rotary lever 34 is attached to the hanger attachment shaft 37. A roller shaft 38 is provided at one end of the rotating lever 34, and a lever connecting shaft 39 is provided at the other end of the rotating lever 34. The roller shaft 38 is located closer to the door closing side than the hanger mounting shaft 37, and the lever connecting shaft 39 is located closer to the door opening side than the hanger mounting shaft 37. The roller shaft 38 and the lever connection shaft 39 are arranged parallel to the hanger attachment shaft 37, respectively.

One end of the connecting rod 35 is rotatably attached to the link connecting shaft 26, and the other end of the connecting rod 35 is rotatably attached to the lever connecting shaft 39. That is, the connecting rod 35 is rotatably connected to the drive link 20 via the link connecting shaft 26 and rotatably connected to the rotating lever 34 via the lever connecting shaft 39. As a result, the direction in which the drive link 20 rotates around the first panel attachment shaft 23 and the direction in which the rotation lever 34 rotates around the hanger attachment shaft 37 become the same direction.

The distance between the link connection shaft 26 and the lever connection shaft 39 is the same as the distance between the first panel attachment shaft 23 and the hanger attachment shaft 37. Furthermore, the distance between the link connection shaft 26 and the first panel attachment shaft 23 is the same as the distance between the lever connection shaft 39 and the hanger attachment shaft 37. Therefore, a parallelogram is formed between the drive link 20 and the rotating lever 34, with the first panel attachment shaft 23, the link connection shaft 26, the lever connection shaft 39, and the hanger attachment shaft 37 as four vertices. .

The distance between the roller shaft 38 and the hanger mounting shaft 37 is the same as the distance between the blade mounting shaft 25 and the first panel mounting shaft 23. Further, the distance between the roller shaft 38 and the blade mounting shaft 25 is the same as the distance between the hanger mounting shaft 37 and the first panel mounting shaft 23. Therefore, a parallelogram is also formed between the drive link 20 and the rotation lever 34, with the first panel mounting shaft 23, the blade mounting shaft 25, the roller shaft 38, and the hanger mounting shaft 37 as four vertices.

A guide roller 40 is rotatably attached to the roller shaft 38. The guide roller 40 can come into contact with the cam 36 when the car door 5 is moved toward the frontage of the car entrance 2. The guide roller 40 contacts the cam 36 only when the car door 5 is within a predetermined movement range from the position where the car doorway 2 is closed to the position where the fixed blade 19 and the fixed interlock roller 29 come into contact. do.

As shown in FIG. 3, when the guide roller 40 is away from the cam 36, the movable blade 21 has reached the gripping position due to its own weight or the action of a spring force. At this time, even if the car door 5 moves, the position of the movable blade 21 is maintained at the gripping position.

When the guide roller 40 is in contact with the cam 36, when the car door 5 is moved in the door closing direction, the rotary lever 34 is rotated in the direction in which the movable blade 21 is displaced to the release position, and the car is closed. When the door 5 is moved in the door opening direction, the rotating lever 34 is rotated in the direction in which the movable blade 21 is displaced to the gripping position.

When the rotary lever 34 is rotated in the direction in which the movable blade 21 is displaced to the release position, the guide roller 40 is guided upward by the cam 36. When the rotary lever 34 is rotated in the direction in which the movable blade 21 is displaced to the gripping position, the guide roller 40 is guided downward by the cam 36.

FIG. 4 is a front view of the landing door 55 when viewed from the hoistway 100 side. A landing entrance (not shown) is provided at the landing on each floor. A landing door frame 50 is fixed to the upper part of the landing entrance. The hall door frame 50 is provided with a hall door rail 51 parallel to the width direction of the hall entrance.

A first landing door pulley 52 is provided at a first end of the landing door frame 50 in the longitudinal direction. A second landing door pulley 53 is provided at the second end of the landing door frame 50 in the longitudinal direction. An endless interlocking rope 54 is wound around the first and second landing door pulleys 52 and 53.

Each landing door 55 has a landing door panel 56 and a landing door hanger 57 fixed to the top of the landing door panel 56. Each landing door hanger 57 is provided with a plurality of landing door rollers 58 that move while rolling on the landing door rail 51. Each landing door 55 is suspended from the landing door rail 51, and opens and closes along the landing door rail 51.

A first landing door 55a, which is one landing door 55, is connected to the interlocking rope 54 via a connecting fitting 59. The second landing door 55b, which is the other landing door 55, is connected to the interlocking rope 54 via a connecting fitting 60. When the interlocking rope 54 circulates due to the opening/closing operation of the first landing door 55a, the second landing door 55b moves in the opposite direction to the first landing door 55a.

An interlock device 18 is provided between the first landing door 55a and the landing door frame 50 to prevent the landing door 55 from opening from the landing side when the car 1 is not on the landing. ing. The interlock device 18 includes a latch 31, an interlock latch 32 that is a latch, a fixed interlock roller 29 that is a first roller, and a movable interlock roller 30 that is a second roller.

FIG. 5 shows an enlarged front view of the interlock device 18 of FIG. 4. The latch 31 is fixed to the center of the landing door frame 50 in the longitudinal direction. The interlock latch 32 is rotatably attached to the landing door hanger 57 of the first landing door 55a. When the landing door 55 is fully closed, the tip of the interlock latch 32 is caught on the latch 31, thereby preventing the landing door 55 from moving in the opening direction.

Interlock rollers 29 and 30 are provided at the first landing door 55a. The fixed interlock roller 29 is arranged coaxially with the rotation axis of the interlock latch 32. When the car door 5 opens, the fixed side interlock roller 29 is pushed toward the door opening side by the fixed blade 19, thereby moving the landing door 55 and opening the door. Further, when the car door 5 is closed, the landing door 55 is moved and closed by being pushed by the movable blade 21 toward the door closing side.

The movable interlock roller 30 is attached to the interlock latch 32 and rotates together with the interlock latch 32. The movable interlock roller 30 is located above the fixed interlock roller 29 and closer to the door closing side than the fixed interlock roller 29 when the interlock latch 32 is engaged with the latch 31.

With this configuration, the fixed blade 19 provided on the car door 5 comes into contact with the movable interlock roller 30 when the car 1 stops at the landing on the floor and the car door 5 is opening. When the movable interlock roller 30 is pushed toward the door opening side, the interlock latch 32 rotates to a position where it is released from the latch 31, and the landing door 55 is unlocked.

The outer diameter of the movable interlock roller 30 is larger than the outer diameter of the fixed interlock roller 29. Furthermore, the hardness of the movable interlock roller 30 is lower than the hardness of the fixed interlock roller 29. In other words, the hardness of the fixed interlock roller 29 is higher than the hardness of the movable interlock roller 30. For example, the hardness of the fixed interlock roller 29 is 80 degrees, and the hardness of the movable interlock roller 30 is 50 degrees.

FIG. 6 shows an enlarged front view of the interlock device 18 when the landing door 55 is unlocked. When the movable blade 21 is displaced from the release position to the gripping position, the movable interlock roller 30 is gripped between the fixed blade 19 and the movable blade 21 . At this time, the movable interlock roller 30 is moved so that the outer diameter of the car entrance 2 in the frontage direction is smaller than the outer diameter before being gripped and larger than the outer diameter of the fixed interlock roller 29. Determine the outer diameter and hardness of the side interlock roller 30. At this time, it is preferable that the outer diameter of the movable interlock roller 30 in the frontage direction of the car entrance/exit 2 is slightly larger than the outer diameter of the fixed interlock roller 29, as shown in FIG. For example, the outer diameter of the movable interlock roller 30 in the frontage direction of the car entrance/exit 2 is 5 mm larger than the outer diameter of the fixed interlock roller 29.

The material used for the fixed side interlock roller 29 is preferably a highly durable material such as nitrile rubber that will not break even when subjected to loads such as running resistance and inertial force caused by opening the landing door 55.

FIG. 7 is a side view of the movable interlock roller 30. As shown in FIG. 7, it is preferable that the surface of the movable interlock roller 30 that contacts the fixed blade 19 and the movable blade 21 has minute convex portions 30a or concave portions 30b.

Next, the operation of the elevator door device configured as described above will be explained. In the following description, the car door 5 and the landing door 55 will be referred to as doors.

When the door is closed, the movable blade 21 is held at the release position with the guide roller 40 in contact with the cam 36. Further, at this time, the fixed blade 19 and the movable blade 21 are arranged at a position away from the interlock device 18 in the frontage direction of the car entrance/exit 2. Furthermore, at this time, since the tip of the interlock latch 32 is caught on the latch 31, the landing door 55 is locked.

When the car 1 stops at the landing on the floor and the car door 5 is moved in the door opening direction by the driving force of the door drive device 8 during the door opening operation, the fixed blade 19 comes into contact with the movable interlock roller 30. After that, while pushing the movable interlock roller 30, the movable interlock roller 30 is displaced from the forward position to the retreat position. As a result, the tip of the interlock latch 32 is disengaged from the latch 31, and the landing door 55 is unlocked.

Further, at this time, the guide roller 40 is guided downward while contacting the cam 36 as the car door 5 moves in the door opening direction. As a result, the rotating lever 34 and the drive link 20 are rotated in the direction in which the connecting rod 35 is displaced upward, and the movable blade 21 is displaced from the release position to the gripping position. At this time, the rotation lever 34 and the drive link 20 are rotated in the same direction.

When the movable interlock roller 30 reaches the retracted position, the fixed blade 19 contacts the fixed interlock roller 29. Furthermore, the movable blade 21 reaches the gripping position. As a result, the movable interlock roller 30 is held between the fixed blade 19 and the movable blade 21. At this time, the guide roller 40 separates from the cam 36.

Thereafter, with the movable interlock roller 30 being held between the fixed blade 19 and the movable blade 21, the fixed interlock roller 29 is pushed by the fixed blade 19 toward the door opening side, thereby opening the car door. 5 moves in the door opening direction together with the landing door 55. At this time, loads such as running resistance and inertial force caused by opening the landing door 55 are applied to the fixed interlock roller 29. When the door moves to the fully open state, the door opening operation is completed.

When the door is fully open, the movable interlock roller 30 is held between the fixed blade 19 and the movable blade 21 and is elastically deformed. In other words, the movable interlock roller 30 receives a horizontal pushing force from the fixed blade 19 and the movable blade 21. At this time, a force is generated from the movable interlock roller 30 that pushes back the fixed blade 19 and the movable blade 21. Specifically, the pushing back force is a normal force. The vertical force includes a repulsive force that causes the movable interlock roller 30 to return to its original circular shape.

When a user of the elevator gets into the car 1, the suspension body 106 connected to the car 1 extends in the moving direction of the car 1, thereby causing the car 1 to move downward. After that, the stretched rope tries to contract, so the car 1 moves upward. In other words, when the user gets into the car 1, the car 1 causes pitching.

At this time, since a vertical force is generated from the movable interlock roller 30 on the fixed blade 19 and the movable blade 21, a frictional force is generated in the opposite direction to the vertical shaking of the car 1. Specifically, when the car 1 moves downward, a frictional force is generated upward, and when the car 1 moves upward, a frictional force is generated downward. In this way, by generating a frictional force in the direction opposite to the moving direction of the car 1, pitching of the car 1 can be suppressed.

Furthermore, the movable interlock roller 30 has minute convex portions 30a or concave portions 30b on its surface. Therefore, the convex portion 30a or the concave portion 30b of the movable interlock roller 30 engages with minute irregularities (not shown) on the surfaces of the fixed blade 19 and the movable blade 21, increasing the contact surface area, which further increases the surface area of the car 1. Vertical vibration can be suppressed.

FIGS. 8 and 9 show changes over time in the pitching of car 1 when a user gets into car 1. The vertical axis represents displacement of the car 1 in the vertical direction, and the horizontal axis represents time. A displacement of 0 mm is a position where the car 1 has stopped on the floor, and is a state where no user is getting on the car 1. A positive displacement indicates that the car 1 has moved upward, and a negative displacement indicates that the car 1 has moved downward. Assume that the user gets into car 1 at a time of 1 second.

The measurement shown in FIG. 8 was performed using the first embodiment. The measurements in FIG. 9 are for a case where the movable interlock roller 30 of the first embodiment is changed. Specifically, the hardness of the movable interlock roller 30 is increased or the outer diameter is decreased. This change reduces the vertical force generated from the movable interlock roller 30 in the direction of the fixed blade 19 and the movable blade 21.

Comparing the measurements in FIG. 8 and FIG. 9, there is almost no difference in the displacement values for 1 to 2 seconds, but a difference gradually appears in the displacement values from 2 seconds onwards. Then, the waveform in FIG. 8 completely converges after 5 seconds have elapsed. On the other hand, the waveform in FIG. 9 completely converges after 8 seconds. In other words, when the first embodiment is used, the pitching of the car 1 is quickly stopped.

When Embodiment 1 is used, since a frictional force is generated in the opposite direction to the moving direction of the car 1, pitching of the car 1 can be suppressed at an early stage. On the other hand, if the hardness of the movable interlock roller 30 is increased or the outer diameter is decreased, the movable interlock roller 30 may be gripped between the fixed blade 19 and the movable blade 21 when the door is fully open. However, the vertical force generated from the movable interlock roller 30 in the direction of the fixed blade 19 and the movable blade 21 is reduced. When this normal force becomes smaller, the frictional force generated in the opposite direction to the moving direction when the car 1 moves in the vertical direction becomes smaller. Therefore, the pitching of the car 1 cannot be suppressed by the frictional force.

During door closing operation, the movable interlock roller 30 is held between the fixed blade 19 and the movable blade 21, and the fixed interlock roller 29 is pushed by the movable blade 21 toward the door closing side, thereby closing the car. The landing door 55 is moved together with the landing door 5 in the door closing direction. Thereafter, when the landing door 55 reaches the position where the landing entrance is closed, the guide roller 40 comes into contact with the cam 36 and the fixed blade 19 comes off from the fixed interlock roller 29.

Thereafter, when the car door 5 is further moved in the door closing direction, the guide roller 40 is displaced upward by the guidance of the cam 36, and the rotating lever 34 and the drive are moved in the direction in which the connecting rod 35 is displaced downward. Link 20 is rotated. As a result, the movable blade 21 is displaced from the gripping position to the release position. At this time, the rotation lever 34 and the drive link 20 are rotated in the same direction. Thereafter, the fixed blade 19 separates from the movable interlock roller 30, and the car door 5 is further moved in the door closing direction, thereby completing the door closing operation.

In the elevator door device according to the first embodiment, the hardness of the movable interlock roller 30 is lower than the hardness of the fixed interlock roller 29. Therefore, when the door is fully open, the movable interlock roller 30 is held between the fixed blade 19 and the movable blade 21 and is elastically deformed. At this time, a vertical force is generated from the movable interlock roller 30 that pushes back the fixed blade 19 and the movable blade 21, so when the car 1 swings in the vertical direction, a frictional force is generated in the opposite direction to the moving direction of the car 1. This frictional force can suppress pitching of the car 1. Further, the hardness of the fixed interlock roller 29 is higher than that of the movable interlock roller 30. Therefore, the load generated by opening the landing door 55 can be withstood for a long period of time. Therefore, the elevator door device according to the first embodiment can suppress pitching of the car 1 while having high durability. As a result, the frequency of replacing parts of the interlock rollers 29, 30 can be reduced, and the discomfort caused to elevator users can be suppressed.

Further, in the elevator door device according to the first embodiment, when the door is closed, the outer diameter of the movable interlock roller 30 is larger than the outer diameter of the fixed interlock roller 29. Therefore, when the door is opened, the fixed blade 19 and the movable blade 21 can grip only the movable interlock roller 30. Furthermore, since no load is applied to the fixed interlock rollers 29 due to the suppression of pitching of the car 1, damage to the fixed interlock rollers 29 can be prevented.

Further, in the elevator door device according to the first embodiment, the hardness of the fixed interlock roller 29 is higher than the hardness of the movable interlock roller 30. Therefore, it is possible to prevent damage to the fixed side interlock roller 29 due to loads such as running resistance and inertial force caused by opening the landing door 55.

Further, in the elevator door device according to the first embodiment, the movable interlock roller 30 is configured to rotate together with the interlock latch 32. Therefore, the movable interlock roller 30 can rotate further rearward than the retracted position. With this configuration, even if the fixed blade 19 pushes the fixed interlock roller 29 and the movable interlock roller 30 when the landing door 55 is opened, the movable interlock roller 30 will move further than the retreated position. Since it rotates, no load is applied to the movable interlock roller 30. Similarly, when the landing door 55 is closed, no load is applied to the movable interlock roller 30. In other words, the load generated by opening and closing the door 55 of the landing can be borne by the fixed interlock roller 29.

Furthermore, in the elevator door device according to the first embodiment, when the door is opened, the outer diameter of the movable interlock roller 30 in the frontage direction of the car entrance 2 is larger than the outer diameter of the fixed interlock roller 29. Slightly larger. Therefore, the movable interlock roller 30 can bear the load of suppressing pitching of the car 1 when the door is fully open. Furthermore, it is possible to prevent the movable interlock roller 30 from separating from the fixed blade 19 or the movable blade 21 while the landing door 55 is being opened or closed. Therefore, failure to engage the interlock latch 32 due to erroneous rotation of the movable interlock roller 30 can be prevented.

Furthermore, in the elevator door device according to the first embodiment, the surface of the movable interlock roller 30 has minute protrusions 30a or recesses 30b. Therefore, the convex portion 30a or the concave portion 30b of the movable interlock roller 30 engages with the minute irregularities on the surfaces of the fixed blade 19 and the movable blade 21, increasing the contact surface area, thereby further suppressing pitching of the car 1. be able to.

In the above embodiment, an example was explained in which the outer diameter of the movable interlock roller 30 is larger than the outer diameter of the fixed interlock roller 29. The outer diameter of the roller 29 may be the same as or smaller than that of the roller 29. In that case, it is preferable that the fixed blade 19 and the movable blade 21 have a Z-shaped cross section instead of a straight line, as shown in FIG.

In the above embodiment, an example was described in which the movable interlock roller 30 is held between the fixed blade 19 and the movable blade 21 and is elastically deformed due to the low hardness of the movable interlock roller 30. , the width of the movable interlock roller 30 may be made shorter than the width of the fixed interlock roller 29, so that the shape is easily elastically deformable. In this case, materials with the same hardness can be used for the fixed interlock roller 29 and the movable interlock roller 30.

Note that the cross sections of the fixed blade 19 and the movable blade 21 are not limited to rectangular shapes, and may have any shape as long as they can grip the movable interlock roller 30 from the horizontal direction. Moreover, the horizontal direction here does not have to be completely horizontal.

Even in the elevator door device configured in this manner, when the door is fully open, the movable interlock roller 30 is held between the fixed blade 19 and the movable blade 21 and is elastically deformed. At this time, a vertical force is generated from the movable interlock roller 30 that pushes back the fixed blade 19 and the movable blade 21, so when the car 1 swings in the vertical direction, a frictional force is generated in the opposite direction to the moving direction of the car 1. This frictional force can suppress pitching of the car 1. Further, the hardness of the fixed interlock roller 29 is higher than that of the movable interlock roller 30. Therefore, the load generated by opening the landing door 55 can be withstood for a long period of time. Therefore, the elevator door device according to the first embodiment can suppress pitching of the car 1 while having high durability. As a result, the frequency of replacing parts of the interlock rollers 29, 30 can be reduced, and the discomfort caused to elevator users can be suppressed.

1 Car, 2 Car entrance/exit, 5 Car door, 19 Fixed blade, 21 Movable blade, 55 Landing door, 29 Fixed side interlock roller, 30 Movable side interlock roller, 30a Convex part, 30b Concave part, 31 Latch, 32 interlock latch

Claims (4)

A car door that opens and closes the car entrance;
a first plate provided on the door of the car and attached along the moving direction of the car;
Provided on the door of the car, and attached so as to be closer to the door opening side than the first plate and along the moving direction of the car, so that when the door of the car opens, the distance from the first plate is narrowed. a second plate material that is displaced;
A landing door that opens and closes the landing entrance;
The landing door is fixed to the landing door and is pushed by the first plate or the second plate to move the landing door , and the outer diameter is the same as that of the first when the car door is open. a first roller smaller than the distance between the plate material and the second plate material ;
The first plate member is provided on the landing door, is attached to a latch for locking the landing door, is more deformable than the first roller, and has an outer diameter that is the same as the car door when the car door is closed. The latch is unlocked by being pushed toward the door opening side by the first plate, and when the car door and the landing door are open, the first plate and a second roller that is held by and elastically deformed by the second plate material ,
The elevator door device , wherein when the car door is closed, the outer diameter of the second roller is larger than the outer diameter of the first roller. The elevator door device according to claim 1, wherein the second roller has a lower hardness than the first roller. the second plate moves in the direction of the frontage of the car entrance;
When the car door and the landing door are open, the outer diameter of the second roller held by the first plate member and the second plate member in the frontage direction of the car entrance is 3. The elevator door device according to claim 1 , wherein the elevator door device has an outer diameter larger than the outer diameter of the roller. The elevator door device according to any one of claims 1 to 3, wherein the second roller has a convex portion or a concave portion on a surface thereof.

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