CN109264556B

CN109264556B - Door device of elevator

Info

Publication number: CN109264556B
Application number: CN201710585529.8A
Authority: CN
Inventors: 王宙; 陈伟丰; 冈田恒彦
Original assignee: Fujitec Co Ltd
Current assignee: Fujitec Co Ltd
Priority date: 2017-07-18
Filing date: 2017-07-18
Publication date: 2021-10-26
Anticipated expiration: 2037-07-18
Also published as: JP2019018998A; CN109264556A; JP6658698B2

Abstract

The invention provides a door device of an elevator, which can ensure sufficient air tightness between a car door and a threshold member. The present invention is characterized by comprising: a car door; a threshold member for guiding the car door in an opening/closing direction at a lower end of the doorway; and a closing member that is movable up and down between a closing position that closes the space between the car door and the threshold member and a retracted position below the upper end of the threshold member, wherein the car door has a lift portion that moves in a door closing direction of the car door to lift the closing member to the closing position in a state of being in contact with the closing member, and the car door moves in a door closing direction, whereby the lift portion comes into contact with the closing member located at the retracted position, and the car door moves to a full-close position, whereby the lift portion lifts the closing member to the closing position, and the closing member has a size that can close the space between the car door and the threshold member, and is lifted up to the full-close position by the lift portion, whereby the upper end of the closing member is brought into close contact with the lower end of the car door.

Description

Door device of elevator

Technical Field

The present invention relates to a door device for opening and closing an entrance of an elevator.

Background

Conventionally, there is known an elevator door apparatus in which airtightness between a door and a threshold member guiding the door in an opening/closing direction is improved (see patent document 1). As shown in fig. 22, the gate device includes: a rectangular plate-shaped door 101 for opening and closing the entrance; a threshold part 102 extending horizontally at the lower end of the doorway and guiding the door 101 in the opening and closing direction; and a shielding member 103 for shielding a gap between the door 101 and the threshold part 102. The shielding member 103 extends downward from the lower portion of the door 101 and horizontally, and is formed of a material having flexibility and elasticity such as rubber. The shielding member 103 causes the lower end portion 103A to contact the upper surface of the threshold portion 102, and causes the lower end portion 103A to slide on the threshold portion 102 in association with opening and closing of the door 101. With this door device 100, airtightness is obtained between the door 101 and the rocker portion 102, and therefore, smoke can be prevented from entering between the door 101 and the rocker portion 102, that is, a smoke blocking effect can be achieved.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2004-323222

In recent years, in elevators such as ultra high-rise buildings in which a car is raised and lowered in a lifting path at a high speed, the air pressure in the car is adjusted by improving the airtightness of the car, thereby preventing a rapid change in the air pressure in the car during lifting. Therefore, a door device having high airtightness is required, and it is conceivable to use the door device 100 described above in a car of an elevator in a super high-rise building or the like.

However, in the door apparatus 100, the shielding member 103 has flexibility and must be slidable with respect to the threshold portion 102 when the door 101 is opened and closed, and therefore, the lower end portion 103A of the shielding member 103 is not firmly pressed against the threshold portion 102. Therefore, a large force is applied to the shielding member 103 due to an air pressure difference generated between the inside and the outside of the car by the adjustment of the air pressure in the car or the like, and thus airtightness between the shielding member 103 and the threshold portion 102 may not be ensured.

Therefore, an object of the present invention is to provide an elevator door apparatus capable of ensuring sufficient airtightness between a car door and a threshold member.

Disclosure of Invention

Means for solving the problems

The door device of an elevator of the present invention comprises:

a car door that opens and closes an entrance of the car;

a threshold member that extends in a horizontal direction at a lower end of the doorway and guides the car door in an opening/closing direction; and

a blocking member that is vertically movable below the car door between a blocking position at which the car door and the threshold member are blocked and a retracted position that is a position equal to or lower than an upper end position of the threshold member,

the car door has a lift portion at a lower end portion, and the lift portion lifts the closing member to the closing position by moving the car door in a door closing direction in a state where the lift portion is in contact with the closing member,

the lifting portion is arranged at the following positions: the car door moves from a fully open position in a door closing direction to come into contact with the blocking member located at the retracted position, and moves to a fully closed position to lift the blocking member to the blocking position,

the closing member has a dimension in the vertical direction capable of closing the gap between the car door and the threshold member, and is lifted to the fully closed position by the lift portion, whereby the upper end of the closing member is brought into close contact with the lower end of the car door.

According to this configuration, the blocking member can be lifted to the blocking position by the driving force of the car door and pressed against the lower end portion of the car door, and therefore, the close contact state between the car door and the blocking member can be reliably maintained, and thus, sufficient airtightness between the car door and the threshold member can be ensured. That is, the car door is driven to move from the fully open position to the fully closed position and is maintained at the position (fully closed position), whereby the closing member is lifted from the retracted position to the closing position by the lift portion, and the close contact state in which the closing member is pressed against the lower end portion of the car door with a sufficient force is maintained. Thereby, sufficient airtightness is ensured between the car door and the threshold member.

Preferably, in the door apparatus of the elevator,

a pair of car doors that are horizontally separated from and close to each other to open and close the doorway,

the intervals in the opening/closing direction between the lift portions provided to the pair of car doors become narrower as they go downward.

According to this configuration, since the closing member is sandwiched between the lift portions of the car doors from both outer sides in the opening/closing direction and lifted upward by the closing members when the pair of car doors are closed (brought close to each other), the closing member can be pressed against and brought into close contact with the lower end portions of the pair of car doors with a sufficient force at each position in the opening/closing direction even if the closing member is elongated in the opening/closing direction. As a result, sufficient airtightness can be ensured between the pair of car doors and the threshold member.

In addition, the door device of the elevator can also be provided with a force application component,

the biasing member generates a biasing force or increases a biasing force in association with elastic deformation of the closing member when lifted from the retracted position to the closing position, and biases the closing member to the retracted position when the closing member is positioned at the closing position.

According to this configuration, the urging member can generate a sufficient urging force by the driving force of the car door when the door is closed, and the closing member can be reliably moved from the closing position to the retracted position by the urging member without using other power or the like when the door is opened. That is, the blocking member located at the blocking position can be reliably moved to the retracted position only by the urging force or the increased urging force generated by the urging member when the car door is moved from the fully closed position to the door opening direction (specifically, the lift portion is separated from the blocking member) and the blocking member is lifted to the blocking position by the lift portion when the car door is closed.

In addition, in the door device of the elevator, the door device may further include,

the car door has a pressing portion at the lower end portion, the pressing portion extending downward at a position closer to the door opening direction than the lift portion and pressing the blocking member toward the retracted position by moving the car door in the door opening direction in a state of being in contact with the blocking member,

the closing member has:

a main body extending in the opening and closing direction;

a lifted portion that extends from an upper end portion of the main body toward the car door and is lifted by the car door moving in a door closing direction in a state where an end portion facing the lifted portion in the opening/closing direction is in contact with the lifted portion; and

a pressed portion extending from a position spaced apart from the lifted portion toward a door opening direction side toward the car door side at an upper end portion of the main body and lower than the lifted portion,

the end of the pressed part on the door closing side has a shape that is positioned upward as the pressed part moves toward the door opening direction.

According to this configuration, the pressed portion can be pressed by the pressing portion with the driving force of the car door when the door is opened, and therefore the blocking member can be pressed from the blocking position to the retracted position without using other power or the like when the door is opened.

the end portion of the lifted portion has a shape that comes into close contact with the lifted portion when the closing member is located at the closing position.

According to this configuration, when the closing member is located at the closing position, the lifted portion of the car door and the lifted portion of the closing member are also in close contact with each other, and therefore, the airtightness between the car door and the threshold member is further improved.

Effects of the invention

As described above, according to the present invention, it is possible to provide an elevator door apparatus capable of ensuring sufficient airtightness between the car door and the threshold member.

Drawings

Fig. 1 is a diagram showing an elevator structure including a door device according to the present embodiment.

Fig. 2 is a view showing the periphery of the doorway in the car.

Fig. 3 is a view showing a lower portion of a door device of an elevator in a fully closed state.

FIG. 4 is a cross-sectional view of the IV-IV position of FIG. 3.

Fig. 5 is a top view of the threshold member.

Fig. 6 is a cross-sectional view at the vi-vi position in fig. 5.

Fig. 7 is a cross-sectional view of the vii-vii position in fig. 5.

FIG. 8 is a sectional view taken at a position VIII to VIII in FIG. 5.

Fig. 9 is a front view of the car door.

Fig. 10 is a cross-sectional view at the X-X position in fig. 3.

Fig. 11 is a view showing the abutment portion and its periphery when the car door is at the fully closed position.

Fig. 12 is a diagram showing the abutting portion and its periphery when the abutting portion passes over the pressed portion.

Fig. 13 is a sectional view showing the vertical frame and the door-opening-side end of the car door at the fully closed position.

Fig. 14 is a sectional view showing the vertical frame and the car door positioned closer to the door opening side than the fully closed position.

Fig. 15 is a diagram for explaining the airtight structure between the car door and the upper frame.

Fig. 16 is a sectional view for explaining the airtight structure between the car door and the upper frame.

Fig. 17 is a front view of the lower airtight member.

FIG. 18 is a cross-sectional view taken at a location X VIII-X VIII in FIG. 17.

Fig. 19 is a schematic view of the door apparatus when the car door is at the fully closed position.

Fig. 20 is a schematic view of the door apparatus of the elevator with the car door at a position halfway between the fully closed position and the fully open position.

Fig. 21 is a schematic view of a door apparatus of an elevator with a car door at a fully open position.

Fig. 22 is a cross-sectional view of a lower portion of a conventional elevator door apparatus.

Detailed Description

An embodiment of the present invention will be described below with reference to fig. 1 to 21.

The door device of an elevator according to the present embodiment (hereinafter, also simply referred to as "door device") is provided in a car that ascends and descends in an ascending and descending path. As shown in fig. 1 and 2, the door device is provided in a car body 11 on which an elevator passenger is going to get on and off, and in a state (parked state) in which a car 10 is stopped at a boarding/alighting place 9, the door device opens and closes a boarding/alighting place door 91 that opens and closes a boarding/alighting place 90 of the boarding/alighting place 9 by interlocking with the boarding/alighting place door to open and close a boarding/alighting place 12 of the car body 11. In the car 10 of the present embodiment, the peripheral edge portions (the sill member 3 and the frame 5) of the doorway 12 of the car body 11 and the car door 2 are highly airtight.

The door device 1 includes: a pair of car doors 2 that open and close doorway 12 of car 10 (car body 11); a threshold member 3 that extends horizontally at a lower end of the doorway 12 and guides the car door 2 in an opening/closing direction (a left-right direction in fig. 2); and a lower airtight member (closing member) 4 disposed below the car door 2 so as to be movable up and down. The lower airtight member 4 is vertically movable below the car door 2 between a blocking position (see fig. 11 and 19) for blocking the space between the car door 2 and the threshold member 3 and a retracted position (see fig. 12 and 21) which is a position equal to or lower than the upper end position of the threshold member 3.

Further, the gate device 1 includes: a frame portion 5 defining an entrance 12 together with the threshold member 3; and an opening/closing mechanism 6 that opens and closes the car door 2. The door device 1 of the present embodiment further includes a biasing member 7 (see fig. 4) that biases the lower airtight member 4. The door apparatus 1 of the present embodiment is a so-called center-split door apparatus in which a pair of car doors 2 are separated and approached in a horizontal direction to open and close.

As shown in fig. 3 to 8, the threshold member 3 is an elongated member extending in the opening and closing direction. The threshold member 3 includes: a guide groove 31 for guiding the car door 2; and a slit portion 32 through which the lower airtight member 4 moves up and down inside. In the threshold member 3 of the present embodiment, the guide groove 31 is disposed on the landing place 9 side, and the slit portion 32 is disposed on the indoor side of the car body 11.

The guide groove 31 is recessed downward from an upper end (upper surface) of the rocker member 3 and extends in the opening/closing direction. The width (dimension in the vertical direction in fig. 5) and depth of each position in the opening/closing direction of the guide groove 31 are constant.

The slit portion 32 has: a penetrating portion 321 that penetrates in the vertical direction and extends in the opening and closing direction; and groove portions 322 extending from both ends of the penetrating portion 321 in the same direction (opening/closing direction) as the penetrating portion 321. The width (the dimension in the vertical direction in fig. 5) of each position in the opening/closing direction of the slit portion 32 is constant. The width of the slit portion 32 corresponds to the size of the lower airtight member 4 that moves up and down inside. The dimension of the penetrating portion 321 in the opening/closing direction is larger (longer) than the dimension of the pair of car doors 2 (see fig. 19) in the fully closed position in the opening/closing direction. The groove portion 322 is a groove recessed downward from the upper end of the rocker member 3, and extends from the end portion of the penetrating portion 321 to a position corresponding to the end portion on the opening side of the car door 2 at the fully open position. The groove 322 has the same depth at each position in the opening/closing direction. Thus, the slit portion 32 having the penetrating portion 321 and the groove portion 322 is provided parallel to the guide groove 31.

The frame portion 5 defines the side end and the upper end of the inlet/outlet 12. The frame portion 5 includes: a pair of vertical frames 51 spaced apart in the opening/closing direction and extending in the vertical direction; and an upper frame 52 extending in the opening and closing direction and connecting upper ends of the pair of vertical frames 51 to each other.

The pair of vertical frames 51 each have a sealing sheet 511 (see fig. 13 and 14) protruding in the door opening direction and extending in the vertical direction at the end on the door opening side.

The upper frame 52 includes a sealing sheet 521 (see fig. 15 and 16) protruding toward the boarding/alighting location 9 and extending substantially in the opening/closing direction at an end portion on the boarding/alighting location 9 side. The sealing sheet 521 descends from the center in the opening/closing direction toward the end. That is, the sealing sheet 521 extends at a downward slope from the center to the end in the opening/closing direction.

Returning to fig. 1, the opening/closing mechanism 6 includes: a door rail 61 extending in the horizontal direction above the doorway 12 of the car body 11; a door hanger 62 movable along the door rail 61 in a state in which the car door 2 is suspended; and a driving unit 63 that drives the door hanger 62 to open and close the car door 2. A door hanger 62 suspends a car door 2. That is, the opening/closing mechanism 6 of the present embodiment has a pair of door hangers 62.

As shown in fig. 9, 11, and 12, each of the pair of car doors 2 has a sliding contact surface (lift portion) 213 at a lower portion, and the sliding contact surface 213 has a shape that is located lower in the door closing direction, and moves the car door 2 in the door closing direction (rightward in fig. 11 and 12) in a state of contact with the lower air-tight member 4, thereby lifting the lower air-tight member 4 to the closing position. Specifically, each of the pair of car doors 2 includes: a plate-shaped door main body 20; and an abutting portion 21 projecting downward from the lower end of the door main body 20. Further, each of the pair of car doors 2 includes: a sealing member 22 disposed at a lower end portion of the door main body 20; and a door shoe 23, wherein the door shoe 23 slides in the guide groove 31 of the rocker member 3 while being fitted in the guide groove 31. Fig. 9 to 12 show one of the pair of car doors 2 as the car door 2.

The door main body 20 is a rectangular plate shape extending in the opening and closing direction and the vertical direction. The upper end of the door main body 20 is connected to a door hanger 62, and is suspended from the door hanger 62. The door main body 20 has a recess 201 (see fig. 4) at a lower end thereof, which is recessed upward from the lower end and extends in the opening/closing direction. The dimension of the recess 201 in the in-and-out direction of the car 10 (the direction orthogonal to the opening and closing direction on the horizontal plane: the left-right direction in fig. 4) is larger than the width of the slit portion 32 of the rocker member 3.

The contact portion 21 has: a sliding contact member 211 which is in sliding contact with the lower airtight member 4 when the door is closed; and a fixing member (pressing portion) 212 that fixes the sliding contact member 211 to the door main body 20. The contact portion 21 has a length dimension extending from the lower end portion of the door main body 20 into the slit portion 32 in the vertical direction and forming a minute space with the bottom of the groove portion 322.

The fixing member 212 is fixed to a lower portion (specifically, a side surface on the door opening side) of the door main body 20 and extends into the slit portion 32. A boundary portion 212A between the lower end of the fixing member 212 and the side end on the door-open side has an arc-shaped curved surface as viewed in the insertion and extraction direction (see fig. 11 and 12).

The sliding contact member 211 is disposed on the door closing side of the fixing member 212 in a state where at least the lower portion thereof is fitted into the slit portion 32. The sliding contact member 211 has a sliding contact surface 213 on which the lower airtight member 4 abuts when the door is closed. The sliding contact member 211 of the present embodiment has a triangular shape as viewed from the entrance and exit direction with the lower end surface 211A horizontal, and the sliding contact surface 213 is an inclined surface that descends as it goes toward the door closing direction. The lower end surface (horizontal surface) 211A of the sliding contact member 211 also serves as the lower end surface of the contact portion 21. The sliding contact surface 213 is disposed at the following positions: the car door 2 moves from the fully open position in the door closing direction to contact the lower airtight member 4 located at the retracted position, and the car door 2 moves to the fully closed position to raise the lower airtight member 4 from the retracted position to the blocking position (see fig. 9, 11, and 12).

The seal member 22 is disposed in the recess 201 of the door main body 20. As shown in fig. 4, the seal member 22 has a shape along the inner surface of the recess 201. Specifically, the seal member 22 includes: a belt-like portion 221 elongated in the opening and closing direction; and a pair of side wall portions 222 extending downward from both ends in the width direction (short-side direction) of the belt-like portion 221.

As shown in fig. 3, 4 and 10, the door shoe 23 is attached to the lower end of the door main body 20 and fitted into the guide groove 31. When the car door 2 is opened and closed, the door shoe 23 slides in the opening and closing direction in the guide groove 31, thereby guiding the lower end of the door main body 20 in the opening and closing direction. That is, the door shoe 23 prevents the lower end of the door main body 20 suspended from the door hanger 62 from swinging in the entrance and exit direction.

As shown in fig. 13 to 16, the car door 2 of the present embodiment includes: a side airtight part 24 capable of sealing between the door main body 20 and the vertical frame 51; and an upper airtight portion 25 capable of sealing between the door main body 20 and the upper frame 52.

The side airtight portion 24 protrudes from a surface of the side end portion of the door main body 20 facing the vertical frame 51 side. The side airtight portion 24 includes: a recess 241 recessed from an end in the door closing direction in the door opening direction and extending in the vertical direction; and a pair of elastic pieces 242 extending from the end of the side wall of the recess 241 on the opening side toward the center of the recess 241 in the width direction and extending in the vertical direction.

In the side airtight portions 24, when the car doors 2 are at the fully closed position, the airtight pieces 511 of the vertical frame 51 are inserted between the pair of elastic pieces 242 (see fig. 13), and airtightness between the side portions of the car doors 2 and the vertical frame 51 is ensured. Further, the car door 2 moves from the fully closed position in the door opening direction, and thereby the sealing piece 511 is pulled out from between the elastic pieces 242 (see fig. 14).

The upper airtight portion 25 protrudes from a surface of the upper end portion of the door main body 20 toward the upper frame 52. The upper airtight portion 25 includes: an upper piece 251 protruding toward the upper frame 52 side and extending substantially in the opening/closing direction; and a sealing member 252 provided on a lower surface of the upper plate portion 251. The upper plate 251 is disposed at a position above the sealing piece 521 of the upper frame 52 and parallel to the sealing piece 521 when the car doors 2 are at the fully closed position. The seal member 252 extends substantially in the opening/closing direction along the upper plate 251, and when the car door 2 is at the fully closed position, the seal member 252 seals between the upper plate 251 and the seal plate 521 of the upper frame 52 (see fig. 15 and 16). Further, the car door 2 moves from the fully closed position in the door opening direction, whereby the seal member 252 is separated from the seal piece 521 of the upper frame 52.

As shown in fig. 3, the lower air seal member 4 has a dimension in the vertical direction that can close the space between the car door 2 and the rocker member 3, and is lifted to the closing position by the contact portion 21 (specifically, the sliding contact member 211), whereby the upper end of the lower air seal member 4 is brought into close contact with the lower end of the car door 2. The lower airtight member 4 of the present embodiment is pressed against the sealing member 22 (specifically, the strip-shaped portion 221) disposed in the recess 201 of the door main body 20, and thereby the upper end of the lower airtight member 4 is brought into close contact with the sealing member 22 (see fig. 4). Specifically, as shown in fig. 17 and 18, the lower airtight member 4 includes: a (elongated) main body 41 extending in the opening and closing direction; a lifted portion 42 lifted by the door closing operation of the car door 2; and a pressed portion 43 that is pressed by the door opening operation of the car door 2. The lower airtight member 4 of the present embodiment further includes a shaft portion 44 on which the urging member 7 is disposed.

The main body 41 has: a strip-shaped rising portion 411 that extends in the vertical direction and the opening/closing direction and is elongated in the opening/closing direction; a flange portion 412 extending horizontally from the rising portion 411; and a sealing member 413 disposed on the upper surface of the flange portion 412 in a state of surrounding the rising portion 411.

The rising portion 411 moves up and down in the penetrating portion 321 of the rocker member 3. The thickness (dimension in the direction of insertion and removal) of the rising portion 411 is slightly smaller than the width of the penetrating portion 321 (slit portion 32), and the dimension of the rising portion 411 in the direction of opening and closing is slightly smaller than the dimension of the penetrating portion 321 in the direction of opening and closing.

The flange portion 412 extends horizontally from the lower end of the rising portion 411, and when the rising portion 411 moves upward (that is, when the lower air-sealing member 4 moves to the closing position), the sealing member 413 is pressed against the peripheral edge of the through portion 321 on the lower surface side of the rocker member 3. In the flange portion 412 of the present embodiment, the seal member 413 is pressed against the peripheral edge portion of the penetrating portion 321 on the lower surface side of the rocker member 3 via the member 35 for fixing the rocker member 3 to the car body 11.

The seal member 413 is pressed by the flange portion 412 against the peripheral edge portion of the penetrating portion 321 of the rocker member 3, thereby sealing the gap between the lower air-sealing member 4 (the main body 41) and the rocker member 3 (the slit portion 32).

The lifted portion 42 is a portion that extends upward (i.e., toward the car door 2) from an upper end portion of the main body 41 (specifically, the rising portion 411), and is lifted by the car door 2 moving in the door closing direction while an end portion (end surface) 421 facing the sliding contact member 211 (specifically, the sliding contact surface 213) in the opening/closing direction is in contact with the sliding contact member 211. The lifted portion 42 of the present embodiment has an upper end that is flat in the opening/closing direction as viewed in the entering/exiting direction, and has a larger dimension in the opening/closing direction as going from the lower end to the upper end. That is, the lifted portion 42 has an inverted trapezoidal shape as viewed in the entering and exiting direction. The upper end portion of the lifted portion 42 has a tapered shape (a cross section taken along a plane including the entering and exiting direction and the vertical direction) whose width decreases toward the upper end (see fig. 18).

In addition, an end portion (side end surface) 421 in the opening/closing direction of the lifted portion 42 of the present embodiment is an inclined surface that descends as it goes toward the door closing direction. The end 421 has a shape that comes into close contact with the sliding contact surface 213 of the sliding contact member 211 when the car door 2 is at the fully closed position and the lower airtight member 4 is lifted to the closed position. The height of the lifted portion 42 is such that, when the car door 2 moves to the fully closed position in a state where the lower airtight member 4 is at the retracted position, the lower portion of the contact portion 21 (more specifically, the end portion on the closing side of the lower portion) contacts the upper portion of the end portion 421 of the lifted portion 42 (see fig. 12 and 20).

The pressed portion 43 extends upward (toward the car door 2) from a position spaced apart from the lifted portion 42 in the door opening direction at the upper end portion of the main body 41 (specifically, the rising portion 411). The end portion (side end surface) 431 of the pressed portion 43 on the door closing side has a shape that is positioned upward as going toward the door opening direction. For example, specifically, the end 431 of the pressed portion 43 is an inclined surface that rises as it goes toward the door opening direction. The pressed portions 43 of the present embodiment are provided on both sides of the lifted portion 42 in the opening and closing direction. That is, the lower airtight member 4 has a pair of pressed portions 43.

The distance between the pressed portion 43 and the lifted portion 42 is set so that the contact portion 21 can be positioned between the pressed portion 43 and the lifted portion 42 when the car door 2 is at the fully closed position (see fig. 11 and 19). The pressed portion 43 is lower than the lifted portion 42. Specifically, the height of the pressed portion 43 is such that the contact portion 21 can pass above the pressed portion 43 when the car door 2 moves in the opening and closing direction in a state where the lower air-tight member 4 is at the retracted position (see fig. 12 and 20).

The shaft 44 extends downward from the lower end of the body 41. The shaft portions 44 of the present embodiment are arranged two by two with a gap in the opening and closing direction. The two shaft portions 44 are disposed at equal distances from the center of the main body 41 in the opening/closing direction.

The lower airtight member 4 configured as described above is disposed so as to be vertically movable such that when the lower airtight member 4 is located at the retracted position, the upper end of the lifted portion 42 is located at the same position as or slightly lower than the upper end (upper surface) of the threshold member 3, and when the lower airtight member 4 is located at the closed position, the upper end of the lifted portion 42 is located in close contact with the lower portion of the door main body 20 (specifically, a position in close contact with the band-shaped portion 221 of the sealing member 22 in the recess 201: see fig. 4).

The biasing member 7 generates or increases a biasing force due to elastic deformation accompanying the lower airtight member 4 being lifted from the retracted position to the closed position, and the biasing member 7 biases the lower airtight member 4 to the retracted position when the lower airtight member 4 is at the closed position. The urging member 7 of the present embodiment is a so-called coil spring. The urging member 7 is disposed so that the shaft portion 44 passes through the center of the spiral (see fig. 4). The lower end of the biasing member 7 is fixed to the shaft 44, and the upper end of the biasing member 7 is fixed to a bracket 351, the bracket 351 extending from the member 35 to which the rocker member 3 is fixed, and the shaft 44 penetrating the bracket 351. The spacing between the bracket 351 and the sill member 3 is constant.

The distance between the upper end and the lower end of the biasing member 7 (i.e., the vertical distance between the portion of the shaft 44 to which the lower end of the biasing member 7 is fixed and the bracket 351) is equal to or less than the natural length of the biasing member 7 when the lower airtight member 4 is at the retracted position. Then, the lower airtight member 4 is moved (lifted) to the closing position, and the biasing member 7 is compressed in the vertical direction, thereby generating a biasing force in a direction in which the lower airtight member 4 is retracted toward the threshold member 3, or increasing the biasing force.

The gate device 1 configured as described above operates as follows.

As shown in fig. 19, in the fully closed state of the car door 2, the lifted portion 42 is sandwiched between the pair of contact portions 21 (the sliding contact surfaces 213 of the sliding contact members 211), and therefore the lower airtight member 4 is located at the closing position. At this time, since the upper end of the lower air-tight member 4 (lifted portion 42) is in close contact with the lower portion of the door main body 20, the air-tightness between the car door 2 and the rocker member 3 is ensured. Further, when the car door 2 is at the fully closed position, the urging member (coil spring) 7 is in a sufficiently compressed state, and therefore the lower air-sealing member 4 is in a state of being urged downward, but the lower air-sealing member 4 cannot move downward (toward the retracted position) because the lifted portion 42 is sandwiched by the pair of contact portions 21.

In this state, the car 10 stops at the boarding/alighting place 9 (parked state), and the pair of car doors 2 open from the fully closed position. At this time, the pair of contact portions 21 (more specifically, the sliding contact surfaces 213 of the sliding contact members 211) are separated from each other in the opening/closing direction together with the car doors 2, and the lifted portion 42 sandwiched between the pair of contact portions 21 from the outside in the opening/closing direction is released (see fig. 20). With this release, the lower airtight member 4 biased downward by the biasing member 7 is retracted downward (to the retracted position).

At this time, when the lower airtight member 4 is not pressed to the retracted position due to damage or the like of the biasing member 7, the contact portion 21 (the boundary portion 212A of the fixing member 212) comes into contact with the pressed portion 43 by the movement of the car door 2 in the door opening direction, thereby pressing the pressed portion 43. Thus, the car door 2 opens from the fully closed position, and the lower airtight member 4 is reliably pressed to the retracted position.

In the door apparatus 1 of the present embodiment, since the pair of contact portions 21 are disposed at the end portions of the door main body 20 on the door opening side, the lower air-tight member 4 is retracted to the retreat position at a time point when the distance between the lower ends of the pair of contact portions 21 becomes larger than the length dimension of the upper end of the lifted portion 42 due to the door opening (that is, immediately after the car door 2 starts moving in the door opening direction from the fully closed position). When the lower air-tight member 4 is pressed by the contact portion 21, the car door 2 moves in the door opening direction from the fully closed position, the contact portion 21 comes into contact with the pressed portion 43, and the lower air-tight member 4 is also pressed to the retracted position. Thus, even if an elevator passenger exits the car 10 before the car door 2 is fully opened, the lower airtight member 4 does not cause an obstruction.

On the other hand, when the pair of car doors 2 are closed from the fully open position (see fig. 21), the pair of contact portions 21 (specifically, the sliding contact surfaces 213 of the sliding contact members 211) approach each other in the opening/closing direction together with the car doors 2, and the lifted portion 42 is sandwiched by the pair of contact portions 21 from the outside in the opening/closing direction. At this time, since the pushed portion 42 is higher than the pushed portion 43, the pair of contact portions 21 can pass above the corresponding pushed portion 43 to a position where the pushed portion 42 is sandwiched (see fig. 12 and 20). Then, the lower air-tight member 4 is lifted from the retracted position to the closing position against the biasing force of the biasing member 7 with the pair of contact portions 21 sandwiching the lifted portion 42. Thereby, airtightness between the car door 2 and the rocker member 3 is ensured. Further, since the urging member 7 is sufficiently compressed by lifting the lower airtight member 4 to the closing position, the lower airtight member 4 can be urged to the retracted position with a sufficient urging force when the door is opened next time.

In the door device 1 of the present embodiment, since the pair of contact portions 21 are respectively disposed at the end portions of the door main body 20 on the opening side, the lifted portion 42 starts to be lifted to the closing position at a time point when the distance between the lower ends of the pair of contact portions 21 is narrowed to the length dimension of the upper end of the lifted portion 42 by closing the door (that is, immediately before the fully closed position is reached: see fig. 20). Thus, even if an elevator passenger gets in or out of the car 10 immediately after the car door 2 starts to close, the lower airtight member 4 does not cause an obstacle.

According to the door apparatus 1 described above, the lower airtight member 4 can be lifted to the closing position by the driving force of the car door 2 and pressed against the lower end portion of the car door 2. Therefore, the close contact state between the car door 2 and the lower airtight member 4 can be reliably maintained, and thus sufficient airtightness between the car door 2 and the rocker member 3 can be ensured. That is, the car door 2 is driven to move from the fully open position to the fully closed position and is maintained at the position (fully closed position), whereby the lower airtight member 4 is lifted from the retracted position to the closed position by the sliding contact member 211, and the close contact state in which the lower end portion of the car door 2 is pressed against with a sufficient force is maintained. Thereby, sufficient airtightness can be ensured between the car door 2 and the rocker member 3.

In the door apparatus 1 of the present embodiment, a pair of car doors 2 are disposed, and the distance between the sliding contact surfaces 213 of the sliding contact members 211 provided in each of the pair of car doors 2 in the opening/closing direction becomes narrower as it goes downward. Therefore, when the pair of car doors 2 are closed (brought close to each other), the lower airtight member 4 is sandwiched between the sliding contact members 211 of the car doors 2 from both outer sides in the opening/closing direction and lifted upward. Thus, even if the lower airtight member 4 is elongated in the opening/closing direction, it can be pressed against and brought into close contact with the lower end portions of the pair of car doors 2 with sufficient force at each position in the opening/closing direction. As a result, sufficient airtightness can be ensured between the pair of car doors 2 and the rocker members 3.

Further, the biasing member 7 of the door device 1 according to the present embodiment biases the lower airtight member 4 to the retracted position when the lower airtight member 4 is located at the closed position, by generating a biasing force or increasing the biasing force due to the elastic deformation accompanying the lifting of the lower airtight member 4 from the retracted position to the closed position. Therefore, the urging member 7 can generate a sufficient urging force by the driving force of the car door 2 when the door is closed, and the lower air seal member 4 can be reliably moved from the closing position to the retracted position without using other power or the like when the door is opened. That is, when the door is closed, the lower air-tight member 4 in the closed position can be reliably moved to the retracted position only by the urging force generated or increased by the urging member 7 as the lower air-tight member 4 is lifted to the closed position by the sliding contact member 211, and the car door 2 is moved in the door opening direction from the fully closed position (specifically, the sliding contact member 211 is separated from the lower air-tight member 4).

In the lower airtight member 4 of the present embodiment, the pressed portion 43 is provided at a position spaced apart from the lifted portion 42 in the door opening direction side in the upper end portion of the main body 41, and the end portion 431 on the door opening side has a shape that is positioned upward as going toward the door opening direction. Therefore, the pressed portion 43 can be pressed by the contact portion 21 (specifically, the boundary portion 212A of the fixing member 212) by the driving force of the car door 2 when the door is opened. Thus, the lower airtight member 4 can be reliably pressed from the closed position to the retracted position without using any other power or the like when the door is opened. That is, even if the lower air-tight member 4 cannot be pulled down by the biasing force due to damage of the biasing member 7 or the like, the lower air-tight member can be pressed toward the retracted position by opening the door of the car door 2.

In the door device 1 according to the present embodiment, the end 421 of the lifted portion 42 has a shape that comes into close contact with the sliding contact member 211 (specifically, the sliding contact surface 213) when the lower air-tight member 4 is located at the closing position. Therefore, when the lower airtight member 4 is positioned at the closing position, the contact portion 21 of the car door 2 and the lower airtight member 4 are also brought into close contact with each other, and the airtightness between the car door 2 and the rocker member 3 is further improved.

The door device of an elevator according to the present invention is not limited to the above-described embodiment, and various modifications can be added without departing from the scope of the present invention. For example, the configuration of another embodiment may be added to the configuration of an embodiment, and a part of the configuration of an embodiment may be replaced with the configuration of another embodiment. Further, a part of the structure of the embodiment can be deleted.

The door apparatus 1 of the above embodiment is a so-called center-split type door apparatus that opens and closes by horizontally moving and approaching the pair of car doors 2, but is not limited to this configuration. The door device 1 may also be a so-called side-opening door device. If the size of the car door 2 in the opening/closing direction is small, the lower air-tight member 4 can be lifted to the closing position and pushed against the lower portion of the car door 2 with sufficient force even if the contact portion 21 is provided only at one end in the opening/closing direction.

The door device 1 of the above embodiment is provided with the biasing member 7 that biases the lower airtight member 4 from the closing position to the retracted position, but is not limited to this configuration. That is, the biasing member 7 may be omitted. In this case, since the lower air-tight member 4 has the pressed portion 43, the lower air-tight member 4 is also pressed from the closing position to the retracted position when the door is opened. For example, the lower airtight member 4 may be configured to move to the retracted position by its own weight when the lifted portion 42 is released from the pinching by the contact portion 21.

In the door device 1 of the above embodiment, the abutting portion 21 (the sliding contact member 211) is disposed at the end portion of the door main body 20 on the door opening side, but is not limited thereto. The contact portion 21 may be disposed at a position shifted from the end portion of the door main body 20 on the opening side toward the closing side. With this configuration, airtightness between the car door 2 and the rocker member 3 can be ensured at least at a position closer to the door closing side than the contact portion 21.

The pressed portion 43 is provided in the lower airtight member 4 of the above embodiment, but is not limited to this configuration. The lower airtight member 4 may not have the pressed portion 43. Even with this configuration, the lower airtight member 4 can be reliably pressed to the retracted position when the car door 2 is opened by the arrangement of the urging member 7.

The lifted portion 42 and the pressed portion 43 of the lower airtight member 4 of the above embodiment are in sliding contact with the contact portion 21 when lifted or pressed by the contact portion 21, but are not limited to this configuration. The roller may be disposed at least one of the end 421 of the lifted portion 42 and the end 431 of the pressed portion 43 on the door-closing side. With this configuration, resistance when the contact portion 21 lifts the lifted portion 42 or presses the pressed portion 43 can be suppressed.

In the door device 1 of the above embodiment, the sliding contact surface 213 in sliding contact with the lifted portion 42 and the boundary portion 212A in sliding contact with the pressed portion 43 are disposed at both ends in the opening and closing direction of one portion (the contact portion 21). A space may be provided between the portion where the sliding contact surface 213 is disposed and the portion where the boundary portion 212A is disposed.

Description of reference numerals

1 … door device, 2 … car door, 20 … door body, 201 … recess, 201a … inner surface, 21 … contact portion, 211 … sliding contact member, 211a … lower end face, 212 … fixing member, 212a … boundary portion, 213 … sliding contact surface, 22 … seal member, 221 … strip portion, 222 … side wall portion, 23 … door shoe, 24 … side airtight portion, 241 … recess, 242 … elastic piece, 25 … upper airtight portion, 251 … upper portion, 252 … seal member, 3 … threshold member, 31 … guide groove, 32 … slit portion, 321 … penetrating portion, 322 … groove portion, 35 … member with threshold member fixed thereto, … bracket, 4 … lower airtight member (closing member), 41 … body, 411 … rising portion, … lifting seal member, … pressed portion, … end portion, … pressed portion, … end portion, … pressed portion, … end portion, …, 51 … vertical frame, 511 … sealing piece, 52 … upper frame, 521 … sealing piece, 6 … opening and closing mechanism, 61 … door track, 62 … door hanger, 63 … driving part, 7 … urging part, 9 … boarding and descending place, 90 … boarding and descending place entrance and exit, 91 … boarding and descending place door, 10 … car, 11 … car body and 12 … car body entrance and exit

Claims

1. An elevator door device comprises:

a car door that opens and closes an entrance of the car;

the lifting part is arranged at the following positions: the car door moves from a fully open position in a door closing direction to come into contact with the blocking member located at the retracted position, and moves to a fully closed position to lift the blocking member to the blocking position,

the closing member has a dimension in the vertical direction capable of closing the gap between the car door and the threshold member, and is lifted to the closing position by the lift portion, whereby the upper end of the closing member is brought into close contact with the lower end of the car door.

2. The door apparatus for an elevator according to claim 1, wherein the car doors are provided in a pair, and the pair of car doors are separated from and approach each other in a horizontal direction to open and close the doorway,

3. The door device for an elevator according to claim 1, wherein the door device includes a biasing member that generates a biasing force or increases a biasing force in accordance with elastic deformation of the closing member when lifted from the retracted position to the closing position, and the biasing member biases the closing member to the retracted position when the closing member is located at the closing position.

4. The door device for an elevator according to claim 2, wherein the door device includes a biasing member that generates a biasing force or increases a biasing force in association with elastic deformation of the closing member when lifted from the retracted position to the closing position, and the biasing member biases the closing member to the retracted position when the closing member is located at the closing position.

5. The elevator door apparatus according to any one of claims 1 to 4, wherein the car door has a pressing portion at the lower end portion, the pressing portion extending downward at a position closer to a door opening direction side than the lift portion and pressing the blocking member toward the retracted position by moving the car door in the door opening direction while being in contact with the blocking member,

the closing member has:

a main body extending in the opening and closing direction;

6. The door device for an elevator according to claim 5, wherein the end of the lifted portion has a shape that fits closely to the lifted portion when the blocking member is located at the blocking position.