CN103917475B - Airtight device for elevator car and elevator car with airtight device - Google Patents

Abstract

Provided is an airtight device for an elevator car, which can sufficiently ensure airtightness even when the change in the air pressure in the car chamber is small. The airtight device (7) is provided with a door-side member (21) and a frame-side member (23). When the car door moves away from the entrance frame, the door-side member and the frame-side member approach each other. There is a relationship: when the gap between the door-side member and the frame-side member is expanded, the door-frame gap (27) is reduced, and when the gap between the door-side member and the frame-side member is reduced, the door-frame gap is expanded. The door-side member and the frame-side member are in close contact with each other in the fully closed state.

Description

Airtight device for elevator car and elevator car with airtight device

technical field

The present invention relates to an airtight device for an elevator car and an elevator car provided with the airtight device.

Background technique

An elevator includes a car installed so as to be able to move up and down in a hoistway extending up and down. Patent Document 1 discloses an elevator car that has been studied to improve the airtightness of the car interior. In this car, the engaging member is arranged to extend from the door panel, and a retainer having a U-shaped longitudinal section is provided on the upper portion of the entrance and exit opening of the car chamber, and the engaging member is sandwiched by the retainer. Furthermore, a sealing member is provided between the front surface and the back surface of the joining member, and a pair of inner side surfaces of the holder corresponding thereto. The sealing member is attached to one of the retainer and the joint member, and is arranged to be separated from the other by a predetermined gap. And, according to the change of the air pressure of the car chamber, any sealing member is in close contact with the other one mentioned above, and it is intended to obtain desired airtightness.

However, in the structure of the above-mentioned Patent Document 1, when the change in the air pressure of the car chamber is small, the sealing member is not in close contact with the above-mentioned other of the retainer and the joint member, so that the desired airtightness cannot be obtained. issues like sex.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2003-81561

Contents of the invention

The problem to be solved by the invention

The present invention was made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide an airtight device for an elevator car that can sufficiently ensure airtightness even when the air pressure in the car room changes little. And an elevator car with an airtight device.

means to solve the problem

In order to achieve the above object, the airtight device for an elevator car according to the present invention includes: a door side member integrally provided with respect to the car door; and a frame side member integrally provided with respect to the doorway frame. The door side part and the frame side part are arranged such that when the car door moves away from the doorway frame, the distance between the door side part and the frame side part approaches, and the doorway frame has a front end portion located at a position close to the rear surface of the car door on the inside of the car interior, and is provided between the rear surface inside the car interior and the front end portion of the doorway frame There is a door-frame gap, the gap between the door side part and the frame side part, and the door-frame gap in such a relationship that if the gap between the door side part and the frame side part expands, the The door-frame gap is reduced, and if the gap between the door side member and the frame side member is reduced, the door-frame gap is enlarged, and the door side member and the frame side member are fully closed when the car door is fully closed. in close contact with each other.

The effect of the invention

According to the present invention, sufficient airtightness can be ensured even when the change in air pressure in the car interior is small.

Description of drawings

Fig. 1 is a perspective view of an elevator car according to Embodiment 1 of the present invention.

FIG. 2 is a side view of the airtight device according to Embodiment 1. FIG.

3 is a plan view of the airtight device according to Embodiment 1 when fully closed.

Fig. 4 is a diagram showing a state of the airtight device according to Embodiment 1 when the door is opened.

FIG. 5 is a diagram of the same form as FIG. 2 related to Embodiment 2. FIG.

FIG. 6 is a diagram of the same form as FIG. 3 related to Embodiment 2. FIG.

FIG. 7 is a diagram of the same form as FIG. 4 related to Embodiment 2. FIG.

FIG. 8 is a diagram of the same form as FIG. 2 related to Embodiment 3. FIG.

FIG. 9 is a diagram of the same form as FIG. 3 related to Embodiment 3. FIG.

FIG. 10 is a diagram of the same form as FIG. 4 related to Embodiment 3. FIG.

FIG. 11 is a diagram of the same form as FIG. 8 related to Embodiment 4. FIG.

Fig. 12 is a front view of the airtight device according to Embodiment 4 when fully closed.

Fig. 13 is a front view of the airtight device according to Embodiment 4 when the door is opened.

FIG. 14 is a diagram of the same form as FIG. 1 related to Embodiment 5. FIG.

detailed description

Embodiments of the present invention will be described below based on the drawings. Also, in the drawings, the same reference numerals denote the same or corresponding parts.

Embodiment 1

Fig. 1 is a perspective view of an elevator car according to the first embodiment. The elevator car 1 includes a doorway upper frame 3 as one of the doorway frames, a car door 5 and an airtight device 7 . The upper frame 3 of the entrance and exit is located above the entrance and exit 9 of the car.

As an example, two car doors 5 are provided, and are configured as a center-opening type door device. The car door 5 is guided by the door suspension part 11 and the sill 13 so as to be able to slide laterally to open and close the car entrance 9 defined by the entrance upper frame 3 , the sill 13 and the car chamber wall 15 .

The airtight device 7 is a device for improving the airtightness of the car interior. The details of the airtight device 7 will be described based on FIGS. 2 to 4 . FIG. 2 is a side view of the airtight device according to Embodiment 1. FIG. Fig. 3 is a plan view of the airtight device of Fig. 2 when fully closed, and Fig. 4 is a diagram showing a state of the airtight device of Fig. 2 when the door is opened.

As shown in FIG. 2 , the airtight device 7 has a door side member 21 integrally provided with the car door 5 , and a frame side member 23 integrally provided with the doorway upper frame 3 . That is, the door side member 21 is not limited to being directly fixed to the car door 5, but is provided so as to move together with the car door 5 when the car door 5 moves. The same applies to the frame side member 23 , and is not limited to being directly fixed to the doorway upper frame 3 , but is supported by the doorway upper frame 3 .

As an example of a frame, the side member 23 is fixed to the doorway upper frame 3 . The frame side member 23 extends horizontally toward the car door 5 (forward), and a terminal portion 23a on the side of the car door 5 is bent upward at a right angle. That is, in one section as shown in FIG. 2 , the frame side member 23 is formed in an L-shape.

As an example, the door side member 21 is provided between the upper surface of the car door 5 and the door suspension member 11 . The door side member 21 extends horizontally toward the doorway upper frame 3 (rearward), and a terminal portion 21a on the doorway upper frame 3 side is bent downward at a right angle. That is, the door side member 21 is also formed in an L-shape in one cross section as shown in FIG. 2 . Thereby, the door-side member 21 blocks the space between the car door 5 and the doorway upper frame 3 (frame-side member 23 ) so as to cover from above.

As a preferable example, for one or both of the door side member 21 and the frame side member 23 , the opposing surfaces of the door side member 21 and the frame side member 23 are constituted by contact members 25 having restoring force. In the present embodiment, the opposing surfaces of the door side member 21 and the frame side member 23 correspond to the above-described portion bent downward at a right angle and the portion bent upward at a right angle. Therefore, in other words, the contact member 25 of the frame side member 23 is located on the surface of the frame side member 23 opposite to the surface facing the car door 5, and the contact member 25 of the door side member 21 is located on the door side. On the surface of the component 21 opposite to the surface facing the upper frame 3 of the entrance and exit.

In addition, in this embodiment, both the door side member 21 and the frame side member 23 include the contact member 25 . Examples of the abutting member 25 include elastic members, cushioning members, fur members, etc., as long as they are once compressed and deformed and the compressive force is removed, they can obtain a restoring force to return to the original shape. limited to these examples.

The door side member 21 and the frame side member 23 are in substantially close contact with each other in the fully closed state of the car door 5 . In this embodiment, since the contact member 25 which comprises a part of the door side member 21 or the frame side member 23 is provided in the said opposing surface, these contact members 25 are mutually in close contact. In addition, in the fully closed state of the car door 5, the contact member 25 is compressed and deformed compared with the original shape.

The door side member 21 and the frame side member 23 are arranged so that the distance between the door side member 21 and the frame side member 23 becomes close when the car door 5 moves (forward) away from the doorway upper frame 3 . And, in the description related to the direction of the present invention, the left side of the paper of FIG. The up-down direction on the face is taken as the "up-down" direction.

In addition, the doorway upper frame 3 has a front end portion 3 a located at a position close to the rear surface 5 a of the car door 5 on the inside of the car interior. A door-frame gap 27 is provided between the back surface 5 a inside the car interior and the front end portion 3 a of the doorway upper frame 3 . And, the gap between the door side member 21 and the frame side member 23 has such a relationship with the door-frame gap 27 that when the gap between the door side member 21 and the frame side member 23 expands, the door-frame gap 27 shrinks. , when the gap between the door side member 21 and the frame side member 23 is reduced, the door-frame gap 27 is enlarged.

A movement-allowing space 29 is ensured behind the door side member 21, so that when the car door 5 moves close to the upper frame 3 of the entrance and exit until the door-frame gap 27 disappears, the door side member integrated with the car door 5 21's movement is also unimpeded. That is, in the movement allowing space 29, even if the car door 5 moves backward until the door-frame gap 27 disappears in a manner close to the doorway upper frame 3, there is no car door 5 integrated with the car door 5. The part that the door side member 21 that moves ground abuts.

In addition, in one or both of the door side member 21 and the frame side member 23, the opposing surfaces of the door side member 21 and the frame side member 23 are inclined forward and backward with respect to the opening and closing traveling direction of the car door in plan view. In this embodiment, especially as shown most clearly in FIG. 4 , for both the door side member 21 and the frame side member 23 , the opposing surfaces of the door side member 21 and the frame side member 23 are relative to the car when viewed from above. The opening and closing traveling direction D of the compartment door is inclined forward and backward. More specifically, the above-mentioned opposing surface of the frame side member 23 (contact member 25) is inclined in such a direction that the closer the part is to the fully-closed fitting surface C of the car door, the more rearward it is. In addition, the above-mentioned opposing surface of the door side member 21 (contact member 25) is inclined in such a direction that the portion on the front side in the traveling direction during the closing operation of the car door 5 is located more rearward. Thus, as shown in FIG. 4, in the state where the car door 5 is opened, the gap between the door side member 21 and the frame side member 23 is fully opened (the door side member 21 and the frame side member 23 are not in contact), and then As the closing operation of the car door 5 proceeds, the gap between the door side member 21 and the frame side member 23 is gradually closed.

According to the first embodiment constituted as above, since the door side member and the frame side member are in close contact with each other in the fully closed state of the car door, it is possible to ensure the safety of the car interior without depending on the pressurized state of the car interior. full airtightness. On the other hand, when the car door moves close to the upper frame of the entrance and exit due to the wind pressure in the hoistway or the decompression state in the car room, the door-frame gap is sufficiently reduced, thereby ensuring that the car Sufficient airtightness in the compartment. Therefore, in this embodiment, even when the air pressure change (pressurization change) in the car chamber from when the car door is fully closed is small, sufficient airtightness can be ensured.

In addition, when the car door moves close to the upper frame of the entrance and exit due to the wind pressure in the hoistway or the decompression state in the car room as mentioned above, the door-frame gap is sufficiently reduced, thereby ensuring that the car Sufficient airtightness in the room. At this time, since there is a movement allowance space behind the door side parts, the door-frame gap can be sufficiently reduced without hindering the movement of the car door towards the upper frame of the entrance and exit. move.

In addition, for one or both of the door-side member and the frame-side member, the mutually facing surfaces of the door-side member and the frame-side member are constituted by abutting members having a restoring force, and therefore, the car door moves toward the exit and exit of the car. When moving in the direction of the frame, the contact member compressively deforms, thereby further improving the airtightness of the car interior. In addition, if the abutting member is configured to be compressed and deformed compared with the original shape in the fully closed state of the car door, conversely, when the car door moves in a direction close to the upper frame of the entrance, the above-mentioned In addition to the narrowing effect of the door-frame gap, the abutting member expands to its original state due to the restoring force, so that the abutting member 25 of the door side member 21 and the abutting member of the frame side member 23 can also be obtained during this period. 25 of the mutual contact state, therefore, through these two effects, the effect of ensuring airtightness can be obtained more strongly.

In addition, since one or both of the door-side member and the frame-side member is configured such that the opposing surfaces of the door-side member and the frame-side member are inclined relative to the direction of opening and closing of the car door in plan view, the door-side The gap between the member and the frame-side member gradually closes as the car door closes, so that contact between the door-side member and the frame-side member can be avoided when the car door is not near the fully closed position. Therefore, when fully closed, desired airtightness can be ensured, and when not fully closed, friction caused by mutual contact between the door side member and the frame side member can be avoided, thereby preventing damage due to friction. The resulting damage to the part or the increase in the frictional resistance to the opening and closing of the car door.

Embodiment 2

Next, Embodiment 2 will be described based on FIGS. 5 to 7 . FIGS. 5 to 7 are views in the same form as FIGS. 2 to 4 of Embodiment 2, respectively. Except for the parts described below, the second embodiment has the same configuration as the first embodiment described above.

The airtight device 107 of the present embodiment further includes a front-rear position changing mechanism 131 for the door side member 21 . The front-rear position changing mechanism 131 has a guide member 133 and a roller 135 . The guide member 133 is placed behind the frame side member 23 on the doorway upper frame 3 , more specifically, behind the movement allowing space 29 . The guide member 133 has a rail groove 137 . On the other hand, the roller 135 is attached to the door side member 21 via a support member 139 extending forward and backward toward the doorway upper frame 3 to move integrally with the door side member 21 . The roller 135 is engaged with the track groove 137 of the guide member 133 and is guided by the track groove 137 . The track groove 137 extends in the opening and closing traveling direction D (left-right direction) of the car door 5, and its position also changes in the front-back direction. In more detail, in the first area far enough away from the fully closed mating surface C of the car door, the track groove 137 extends along the opening and closing direction D of the car door with a sufficient length. In the second area close to the fully closed fitting surface C, the track groove 137 slightly extends along the opening and closing traveling direction D of the car door at a position closer to the front than the first area. In addition, in the third area located between the first area and the second area, the track groove 137 extends obliquely so that the closer to the fully closed fitting surface C of the car door, the more it is positioned forward.

Such a front-rear position change mechanism 131 changes the position of the door-side member in the front-rear direction along with the opening and closing movement of the car door 5 so that at least the door-side member 21 and the frame-side member 23 are aligned when the car door 5 is fully opened. It becomes a non-contact state, and when the car door 5 is close to the fully closed state, the contact state of the door side member 21 and the frame side member 23 is ensured. Accordingly, the gap between the door side member 21 and the frame side member 23 is gradually closed as the car door 5 is closed.

According to the airtight device of the second embodiment as described above, the same effect as that of the first embodiment can be obtained.

Embodiment 3

Next, Embodiment 2 will be described based on FIGS. 8 to 10 . FIGS. 8 to 10 are diagrams in the same form as FIGS. 2 to 4 relating to Embodiment 3, respectively. Except for the parts described below, this third embodiment has the same configuration as the above-mentioned first embodiment.

In the airtight device 207 of this embodiment, with respect to one or both of the door side member 221 and the frame side member 223, the opposing surfaces of the door side member 221 and the frame side member 223 are relative to each other in a side view. The direction is inclined, and it is inclined forward and backward relative to the direction of opening and closing of the car door when viewed from above. In a preferred example shown in the figure, the end portions 221a and 223a of both the door side member 221 and the frame side member 223 are inclined relative to the vertical direction in a side view, and are relative to the opening and closing of the car door in a plan view. The direction of travel is inclined forward and backward. In addition, as in Embodiment 1, since the contact members 25 are provided on these end portions 221a and 223a, the opposing surfaces of the contact members 25 are inclined with respect to the vertical direction in a side view, and are inclined in a plan view. It is tilted forward and backward relative to the direction of opening and closing of the car door.

Regarding the form of inclination of the facing surface, the facing surface of the frame side member 223 is inclined in such a direction that it gets closer to the car door 5 as it reaches the end. In other words, the opposing surface of the frame side member 223 extends obliquely upward and forward toward the end. In addition, the opposing surface of the door side member 221 inclines in the direction which gets closer to the doorway upper frame 3 as the terminal becomes. Likewise, in other words, the opposing surface of the door side member 221 extends obliquely downward and rearward toward the end.

According to the door side member 221 and the frame side member 223 of such structure, at least when the car door 5 is in the fully open state, the door side member 221 and the frame side member 223 become a non-contact state, and the car door 5 is close to the fully closed state. , the contact state between the door side member 221 and the frame side member 223 can be ensured. That is, the gap between the door side member 221 and the frame side member 223 is gradually closed as the car door 5 is closed.

According to the airtight device of the second embodiment as described above, the same effect as that of the first embodiment can be obtained.

Embodiment 4

Next, Embodiment 4 will be described based on FIGS. 11 to 13 . FIG. 11 is a diagram of the same form as FIG. 8 related to Embodiment 4. FIG. 12 and 13 are front views of the airtight device according to Embodiment 4 when fully closed and when the door is opened, respectively. Except for the parts described below, this fourth embodiment has the same configuration as that of the above-mentioned first embodiment.

In the airtight device 307 of this embodiment, for one or both of the door side member 221 and the frame side member 223, the opposing surfaces of the door side member 221 and the frame side member 223 are relative to each other in a side view. The direction is tilted. In a preferred example shown in the figure, the end portions 221a and 223a of both the door side member 221 and the frame side member 223 are inclined with respect to the up-down direction in a side view. Moreover, similarly to Embodiment 1, since the contact member 25 is provided in these terminal part 221a, 223a, the opposing surface of the contact member 25 is inclined with respect to the up-down direction in side view. Regarding the form of inclination of the facing surface, the facing surface of the frame side member 223 is inclined in such a direction that it gets closer to the car door 5 as it reaches the end. In addition, the opposing surface of the door side member 221 inclines in the direction which gets closer to the doorway upper frame 3 as the terminal becomes.

In addition, the airtight device 307 further includes a vertical position changing mechanism 331 for the door side member 221 . The vertical position change mechanism 331 has a guide member 333 and a roller 335 . The guide member 333 is placed above the door side member 221 or the frame side member 223 on the doorway upper frame 3 , more specifically, above the movement allowing space 29 . The guide member 133 has a rail groove 337 . On the other hand, the roller 335 is attached to the door side member 221 via a support member 339 extending up and down, and moves integrally with the door side member 221 . The roller 335 is inserted into the rail groove 337 of the guide member 333 and is guided by the rail groove 337 . The track groove 337 extends in the opening and closing traveling direction D (left-right direction) of the car door 5, and its position also changes in the up-down direction. More specifically, in the first area far enough away from the fully closed mating surface C of the car door, the track groove 337 extends along the opening and closing direction D of the car door with a sufficient length. In the second area close to the fully closed fitting surface C, the track groove 337 slightly extends along the opening and closing traveling direction D of the car door at a position lower than the first area. In addition, in the third area located between the first area and the second area, the track groove 337 extends obliquely so as to be located lower as it gets closer to the fully-closed fitting surface C of the car door.

Such a vertical position change mechanism 331 changes the vertical position of the door side member 221 as the car door 5 is opened and closed so that at least the door side member 221 and the frame side member are aligned when the car door 5 is fully opened. 223 is in a non-contact state, and when the car door 5 is close to the fully closed state, the contact state between the door side member 221 and the frame side member 223 is ensured. Accordingly, the gap between the door side member 221 and the frame side member 223 is gradually closed as the car door 5 is closed. In addition, the part indicated by the reference numeral 341 is a guide part which moves the door side member 221 and the support member 339 to the left-right direction. The guide part 341 is in a relation to move integrally with the door side member 221 and the support member 339 in the left-right direction, and is in a relation to be movable relative to each other to a certain extent in the up-down direction and the front-rear direction.

According to the airtight device of the second embodiment as described above, the same effect as that of the first embodiment can be obtained.

Embodiment 5

Next, Embodiment 5 will be described based on FIG. 14 . FIG. 14 is a diagram of the same form as FIG. 1 related to Embodiment 5. FIG. Except for the parts described below, Embodiment 5 is configured in the same way as any one of Embodiments 1 to 4 described above. For the airtight device of this embodiment, an airtight device with the same structure as any one of the airtight devices 7, 107, 207, and 307 in Embodiments 1 to 4 is provided between the entrance and exit upper frame 3 and the car door 5 , On this basis, an air pressure control device 443 for controlling the air pressure in the car room according to the lift of the car 1 is also provided. The air pressure control device 443 may be installed above the car chamber, for example. In the illustrated example, the air pressure control device 443 is arranged on the roof of the car.

According to this embodiment, there is an advantage in that the inside of the car can be positively set to a pressurized state or a depressurized state by the air pressure control device 443, thereby further remarkably enhancing the effects of the first to fourth embodiments described above. .

As above, the content of the present invention has been specifically described with reference to preferred embodiments, but it is obvious that those skilled in the art can adopt various modifications based on the basic technical idea and inspiration of the present invention.

For example, in the above-mentioned embodiments, in all the embodiments, the structure of the door side member and the frame side member has been described in the same or symmetrical form, but the present invention is not limited thereto, and may be used only in the door One of the side member and the frame side member is provided with the features of each embodiment. Therefore, for example, the installation of the abutment member, the inclination in the front-rear direction, and the inclination in the vertical direction may be performed on only one of the door-side member and the frame-side member.

In addition, the present invention may be implemented without providing contact members on both the door-side member and the frame-side member. In addition, since the bending form of a door side member or a frame side member is an example, the bending angle is not limited to the above-mentioned right angle, either.

Label description

1: elevator car; 3: upper frame of entrance and exit; 5: car door; 7, 107, 207, 307: airtight device; 21, 221: door side parts; 23, 223: frame side parts; 25: contact Components; 27: door-frame gap; 29: allowable space for movement; 131: front and rear position change mechanism; 331: up and down position change mechanism; 443: air pressure control device.

Claims (9)

1. An airtight device for an elevator car, which has: a door side part, which is arranged integrally with respect to the car door; and a frame side part, which is provided integrally with respect to the access frame, The door side part and the frame side part are arranged such that when the car door moves away from the doorway frame, the distance between the door side part and the frame side part approaches each other, The doorway frame has a front end located at a position close to the back of the car door on the inside of the car room, A door-frame gap is provided between the rear surface inside the car interior and the front end of the doorway frame, The gap between the door side member and the frame side member and the door-frame gap have such a relationship that if the gap between the door side member and the frame side member expands, the door-frame gap decreases , if the gap between the door side part and the frame side part shrinks, the door-frame gap expands, The door side part and the frame side part are in close contact with each other in the fully closed state of the car door; the contact surface of the frame side part and the door side part is: the frame side part and the The surface on the opposite side of the surface facing the car door, the surface of the door side member that is in contact with the frame side member is opposite to the surface of the door side member that faces the doorway frame. side surface. 2. The airtight device of the elevator car according to claim 1, characterized in that, A movement allowance space is ensured behind the door side member so that when the car door moves close to the doorway frame until the door-frame gap disappears, the car door integrally The movement of the door side part is also not hindered. 3. The airtight device of the elevator car according to claim 1, characterized in that, In one or both of the door side member and the frame side member, the opposing surface of the door side member and the frame side member is constituted by an abutting member having a restoring force. 4. The airtight device of an elevator car according to claim 1, wherein: Regarding one or both of the door side member and the frame side member, the opposing surfaces of the door side member and the frame side member are inclined relative to the direction of opening and closing of the car door in plan view. , Thus, the gap between the door-side member and the frame-side member is gradually closed as the car door is closed. 5. The airtight device of an elevator car according to claim 1, characterized in that, The airtight device of the elevator car further includes a front-rear position changing mechanism for the door side member, The front-rear position change mechanism changes the position of the door-side member in the front-rear direction according to the opening and closing movement of the car door so that the door-side member can be moved at least when the car door is fully opened. and the frame side member are in a non-contact state, and when the car door is close to a fully closed state, the contact state between the door side member and the frame side member is ensured, Thus, the gap between the door-side member and the frame-side member is gradually closed as the car door is closed. 6. The airtight device of an elevator car according to claim 1, characterized in that, Regarding one or both of the door side member and the frame side member, the opposing surfaces of the door side member and the frame side member are inclined relative to the up-down direction when viewed from the side, and are opposite to each other when viewed from the top. tilted in the direction of travel of the opening and closing of the car door, Thus, the gap between the door-side member and the frame-side member is gradually closed as the car door is closed. 7. The airtight device of an elevator car according to claim 1, characterized in that, Regarding one or both of the door side member and the frame side member, the opposing surfaces of the door side member and the frame side member are inclined relative to the up-down direction in side view, The airtight device of the elevator car further includes a mechanism for changing the vertical position of the door side member, The vertical position change mechanism changes the vertical position of the door side member in accordance with the opening and closing movement of the car door so that the door side member and the frame side member are in a non-contact state, and when the car door is close to a fully closed state, the contact state between the door side member and the frame side member is ensured, Thus, the gap between the door-side member and the frame-side member is gradually closed as the car door is closed. 8. The airtight device of an elevator car according to claim 1, characterized in that, The airtight device for the elevator car further includes an air pressure control device for controlling the air pressure in the car chamber according to the lifting and lowering of the car. 9. An elevator car, said elevator car having: a doorway frame defining a car doorway for the car room; the car door, which opens and closes the car entrance; and airtight device, which is used to improve the airtightness of the car interior, In said elevator car, The airtight device is the airtight device described in any one of claims 1-8.