CN1697775B - Seals for elevator doors - Google Patents

Abstract

A sealing member (20) that can be brought into contact with a standup wall (8a) of an upper frame (8) of a three-sided frame (3) by an elastic force of a plate spring (18) to seal a gap (G1) created between a hall door (2) and the three-sided frame (3) is provided in the hall door (2). While the hall door (2) is being opened or closed, rollers (22a, 22b) are brought into contact with a roller rolled portion (10a) provided on a side surface of a hanger rail (10) to rotate thereon, and thus the sealing member (20) and the standup wall (8a) are maintained in a non-contact state. When the hall door (2) is in a closed state, the rollers (22a, 22b) drop in recess step portions (24a, 24b). Thus, the sealing member (20) is brought into contact with the standup wall (8a) to seal the gap (G1).

Description

Seals for elevator doors

technical field

The invention relates to a sealing device for an elevator door, which seals the gap between the elevator door and a door adjacent element arranged adjacent to the door.

Background technique

The elevator entrance and exit are arranged on the wall surface of the elevator hall of the building, and the entrance and exit communicate with the elevator shaft in the building. The doorway includes a doorway-shaped three-sided frame (door adjacent member). Hall doors (elevator doors) for opening/closing the entrance are provided on the rear surface side of the three-sided frame. Under normal conditions, the entrance and exit are closed by the hall door.

The hall door has a hanger on its upper part. The suspension has a plurality of rotatable rollers. The entrance has a beam on the inner side of its upper part. The beam includes hanger rails extending in a horizontal direction. The hall door depends downwardly from the hanger rail, with each roller cooperating with the hanger rail. When the hall door moves from right to left or in the opposite direction along the hanger guide rail, the door is opened or closed, respectively.

The sill is installed at the bottom of the entrance, flush with the floor of the elevator hall. A guide groove is formed on the upper surface of the sill. A guide block is provided at the bottom of the hall door, and it fits with the guide groove with a play therebetween. When the hall door is opened/closed, the guide block slides along the guide groove.

Between the hall door and the three-side frame or sill, leave enough clearance so that the hall door can operate smoothly. With this structure, when a fire breaks out in the building, even if the entrance and exit are closed by the hall door, the smoke caused by the fire can enter the elevator shaft through the gap between the hall door and the three-side frame or the sill. As a result, the elevator shaft functions as a chimney allowing the fire to spread. In addition, the elevator cabin moving through the elevator shaft has the following problems. That is, if there is a gap between the elevator cabin entrance and the cabin door, smoke from the flames can enter the cabin through the gap. In this way, passengers in the cabin are exposed to danger.

However, those conventional methods of closing the gap increase the overall size of the door device and also complicate the structure of the door device. Therefore, adjustment operations performed during installation of these facilities become complicated.

Meanwhile, in order to close the gap formed between the bottom of the hall door and the sill, it has been proposed that the sealing member provided at the bottom of the hall door and the sill guide groove should be in sealing contact with each other. However, in utilizing this proposed technique, the frictional force between the sealing member and the guide groove increases, thus making it more difficult to open and close the hall door. In addition, the sealing elements wear out in a short time. In order to avoid this, the contact force between the sealing element and the guide groove should be weakened; in this way, however, if the contact force is weakened, the air-tightness is correspondingly reduced.

Contents of the invention

According to one aspect of the present invention, there is provided a sealing device for an elevator, which enables the entire door to have roughly the same size as a conventional door device, does not require fine adjustment of the sealing element when installed, and enables the door device to Open/close operation is smooth and prevents seal element wear.

According to the invention, a sealing device for an elevator door comprises an elevator door, a door adjacent element, a sealing element and a sealing element movement mechanism. The elevator door is used to close the passage between the elevator hall and the passenger compartment. The door adjacent element is arranged to Around the elevator door with some gap between the element and the elevator door. The sealing element is arranged on either one of the elevator door and the door adjacent element, and at the same time, by virtue of the elastic force of the elastic element, the element is in contact with the other element .The sealing element is used to seal the gap between the elevator door and the door adjacent elements. During the opening/closing operation of the elevator door, the sealing element movement mechanism is used to overcome the elastic force of the elastic element to keep the sealing element and other elements In the non-contact state. In addition, when the elevator door is closed, the mechanism is used to make the sealing element contact another element by means of the elastic force of the elastic element.

The moving mechanism of the sealing element includes a roller and a roller rolling part, and the roller rolling part has a shape extending along the rotation direction of the roller. A concave stepped portion is formed on a part of the roller rolling portion. During the elevator door opening/closing operation, when pushed by the roller rolling portion by means of the elastic force of the elastic member, the roller rotates. In this way, the sealing element is kept in a non-contact state with respect to the other element. When the elevator doors are closed, the rollers drop into the recessed steps. With this structure, the sealing member comes into contact with another member by virtue of the elastic force of the elastic member, thereby sealing the gap formed between these members.

According to another embodiment of the present invention, a sealing arrangement for an elevator is provided, wherein the roller and the sealing element are arranged on the elevator door. The roller rolling portion is provided on the door adjacent portion. During the opening/closing operation of the elevator door, by means of the elastic force of the elastic member, the roller is in elastic contact with the rolling portion of the roller and rotates thereon. In this way, the sealing element remains in a non-contact state with respect to the door vicinity. When the elevator door is closed, the roller falls into the recessed step portion, and at the same time, by virtue of the elastic force of the elastic element, the sealing element contacts the adjacent portion of the door, thereby sealing the gap.

Optionally, according to another embodiment of the present invention, there is provided a sealing device for an elevator, wherein rollers are provided on the elevator doors. The roller rolling portion and the sealing element are provided on the door adjacent portion. During the opening/closing operation of the elevator door, the roller is brought into contact with the roller rolling portion by the elastic force of the elastic member and rotates thereon. In this way, the sealing element remains in a non-contact state with respect to the elevator door. When the elevator door is closed, by means of the elastic force of the elastic element, the roller falls into the recessed step portion, so that the sealing element contacts the elevator door, thereby sealing the gap.

In the above case, for example, the elevator door is a hall door that opens/closes an elevator hall passage, while the door adjacent member is a three-side frame provided in the passage. The sealing member seals the gap formed between the hall door and the upper sides of the three-side frame when the hall door is closed.

In addition, according to yet another embodiment of the present invention, there is provided a sealing device for an elevator, wherein the elevator door is a hall door that opens or closes the elevator hall passage, and the door adjacent element is a door that supports the lower end of the hall door and guides the door to open. and closing sills for operation. When the hall door is closed, the sealing member serves to seal the gap formed between the hall door and the sill.

Furthermore, according to the present invention, there is provided a sealing device for an elevator, wherein the elevator door is a hatch opening or closing the elevator passenger cabin passage, and the door adjacent element is a passage frame arranged on the passage. When the hatch is closed, the sealing element seals the gap formed between the hatch and the passage.

In addition, according to yet another embodiment of the present invention, there is provided a sealing device for an elevator, wherein the elevator door is a cabin door that opens or closes the passage of the elevator passenger compartment, and the door adjacent element supports the lower end of the cabin door and guides its opening and closing. Close the sill for operation. When the hall door is closed, the sealing element seals the gap formed between the hatch and the sill.

Description of drawings

Fig. 1 is a schematic front view of a hall door arranged in an elevator hall passage according to a first embodiment of the present invention when viewed from the elevator shaft side;

Fig. 2 is an enlarged front schematic diagram of the suspension structure of the hall door shown in Fig. 1;

Fig. 3A is a cross-sectional view of the sealing mechanism arranged on the suspension part when the hall door shown in Fig. 1 is in the closed state;

Fig. 3B is a cross-sectional view of the sealing mechanism provided on the suspension part when the hall door shown in Fig. 1 is opened or closed;

Fig. 4A is a cross-sectional view of the sealing mechanism arranged on the sill when the hall door shown in Fig. 1 is in a closed state;

Fig. 4B is a cross-sectional view of the sealing mechanism provided on the sill when the hall door shown in Fig. 1 is opened or closed;

Fig. 5 is a cross-sectional view along the moving direction of the hall door between the concave step portion and the roller of the sealing mechanism of the sill shown in Fig. 4B;

Fig. 6 is a plan view viewed from above, roughly showing the structure between the recessed step portion and the rollers of the sealing mechanism provided at the sill of the hall door shown in Fig. 1;

Fig. 7 is a schematic front view of the hall door arranged in the passageway of the elevator hall when viewed from the side of the elevator shaft in the second embodiment of the present invention;

Fig. 8 is a cross-sectional view of the sealing mechanism arranged on the suspension part of the hall door in the passageway of the elevator hall in the third embodiment of the present invention;

Fig. 9 is a plan view viewed from above, showing the structure between the rollers of the sealing mechanism and the roller guide rails provided in the suspension part of the hall door shown in Fig. 8; and

Fig. 10 is a schematic front view of a hall door provided in the elevator door passage when viewed from the side of the elevator shaft in the fourth embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described below with reference to the drawings.

A first embodiment is shown in FIGS. 1 to 6 . Fig. 1 is a front view of a hall door 2 as an elevator door provided on an elevator hall passage 1 when viewed from the elevator shaft side. The channel 1 includes three side frames 3 and a sill 4 . The three-side frame 3 and the sill 4 are arranged to surround the hall door 2 and serve as door adjacent members provided near the hall door 2 .

The three-side frame 3 has a door shape formed along the periphery of the tunnel 1 except for the bottom. The three-side frame 3 includes a pair of vertical frames 7 arranged on left and right sides and an upper frame 8 coupled between upper portions of the vertical frames 7 formed in a door shape. The beam 9 is integrally formed with the upper part of the upper frame 8 . The hanger rail 10 is installed horizontally on the side surface of the beam 9 via a bracket 11 shown in FIG. 3 so as to extend in the left-right direction.

A pair of hall doors 2 are provided in the left-right direction on the rear surface side of the three-side frame 3 parallel to each other. The upper portion of each hall door 2 has a hanger 13 . A plurality of rollers 14 are rotatably provided at left and right portions adjacent to a side surface of each hanger 13 . Each hall door 2 is movably suspended on the hanger rail 10 by means of these rollers 14 . When hall door 2 moves, aisle 1 opens or closes.

2 and 3 each show an enlarged view of the structure of the suspension portion of the hall door 2 . A sealing mechanism 17 for sealing a gap G1 between the hall door 2 and the upper frame 8 of the three-side frame 3 is provided on the suspension portion.

The sealing mechanism 17 will be described below. That is, the leaf spring 18 as an elastic member is provided on one side surface of the hanger 13 of the hall door 2 , which side faces the three-side frame 3 . The lower half of the leaf spring 18 has approximately the same width as the hall door 2 while its upper part is fixed to the hanger 13 . The free end of the lower part of the leaf spring 18 is inclined towards the three-sided frame 3 with respect to the vertical surface. A sealing member 20 made of an elastic material such as rubber is mounted on the lower edge portion.

The sealing member 20 has a hollow body portion 20a and a tongue portion 20b extending downward from the body portion 20a. The sealing element 20 is designed to have a length approximately equal to the width of the hall door 2 .

The hall doors 2 each have a sealing plate 19 whose width is approximately the same as that on the upper end surface of each hall door 2. The standing wall 8a is integrally formed with the upper frame 8 of the three-side frame 3. The leaf spring 18 Press the main part 20a of the sealing member 20 against the vertical wall 8a of the three-side frame 3, and press the tongue part 20b against the sealing plate 19 of each hall door 2.

A pair of rollers 22a and 22b are installed on the approximately vertical middle portion of the leaf spring 18, spaced on the left and right sides so that the rollers 22a and 22b face the roller rolling portion 10a of the side surface of the hanger rail 10. The rollers 22 a and 22 b are arranged at high-low positions so as to be spaced apart from each other, and they are rotatably supported in the rotation direction of the vertical shaft via the support shaft 23 .

Each of the rollers 22 a and 22 b comes into contact with the roller rolling portion 10 a on the side surface of the hanger rail 10 by virtue of the elastic force of the leaf spring 18 . With this structure, each roller 22a and 22b turns on the surface of the roller rolling portion 10a when the hall door 2 moves in the left-right direction.

Recessed step portions 24a and 24b are formed on the roller rolling portion 10a in the middle of the rolling paths of the rollers 22a and 22b, respectively. When the hall door 2 is closed, the rollers 22a and 22b drop into the concave step portions 24a and 24b, respectively, by the elastic force of the leaf spring 18 . It should be noted that in FIG. 3 , for the convenience of illustration, the concave step portions 24 a and 24 b are shown as being on the same cross section.

As shown in Fig. 1 and Figs. 4A and 4B, the sill 4 is horizontally arranged at the bottom of the tunnel 1, flush with the floor surface of the elevator hall, and extends in the left and right directions. A guide groove 27 is formed on the upper surface of the sill 4 along the longitudinal direction thereof. A plurality of guide blocks 28 are mounted to the lower end portion of each hall door 2 . Each guide block 28 is slidably installed in the guide groove 27 . Each guide block 28 slides along the guide groove 27 when the hall door 2 moves. Along the longitudinal direction of the guide groove 27, a plurality of through holes 27a for discharging dust and debris are formed at corresponding positions in the middle of the bottom surface thereof.

A sealing mechanism 29 is provided between each hall door 2 and the sill 4 for sealing the gap G2 between each hall door 2 and the sill 4 . The sealing mechanism 29 will be described below. A leaf spring 30 serving as an elastic member is installed at the lower portion of the inner wall surface of each hall door 2 . This leaf spring 30 has a bent portion 30a at its substantially vertical middle portion, and the upper portion of the spring is fixed to the corresponding hall door 2 . A seal member 31 made of an elastic material such as rubber is installed horizontally on a lower portion of the leaf spring 30 . When the bent portion 30a is elastically deformed, the sealing member 31 moves up and down.

The length of the sealing element 31 is approximately the same as the width of each hall door 2 , and can be slidably engaged with the rear surface of the corresponding hall door 2 . The sealing member 31 is supported by the leaf spring 30 such that its lower edge protrudes downward from the corresponding hall door 2 so as to face the upper surface of the sill 4 . The sealing element 31 is located at a position on the side of the elevator hall relative to the guide groove 27 of the sill 4 .

Rollers 34 a and 34 b are mounted on respective ends of the sealing member 31 via support shafts 33 , respectively. The rollers 34a and 34b are disposed spaced apart from each other in the front-rear direction inside the sealing member 31, and they are rotatably supported about respective shafts 33 disposed horizontally.

A part of the upper surface of the sill 4 is formed as a roller rolling portion 4a on which the rollers 34a and 34b rotate. As shown in FIGS. 5 and 6, depressed step portions 35a and 35b corresponding to the rollers 34a and 34b are formed on partial regions in the middle of the roller rolling portion 4a. When the hall door 2 is in the closed state, the rollers 34a and 34b drop into the corresponding concave step portions 35a and 35b by virtue of the elastic force of the leaf spring 30 . It should be noted that in FIGS. 4A and 4B , for the convenience of illustration, the concave step portions 35 a and 35 b are shown on the same cross section.

The operation of the elevator door sealing device according to the present invention will be described below.

The passageway 1 is closed when each hall door 2 is closed, as shown in FIG. The leaf spring 18 engages the body part 20a of the sealing member 20 provided at the lower edge thereof with the vertical wall 8a of the upper frame 8 of the three-side frame 3, and engages the tongue part 20b with the seal plate 19 of the hall door 2. In this way, the gap G1 between the corresponding hall door 2 and the upper frame 8 of the three-side frame 3 is sealed.

In addition, as shown in FIG. 4A, the rollers 34a and 34b of the sealing mechanism 29 fall into the corresponding concave step portions 35a and 35b formed in the roller rolling portion 4a. In this way, the sealing member 31 is connected with the elastic force of the leaf spring 18. The upper surface of the sill 4 fits. In this way, the gap G2 between the corresponding hall door 2 and the sill 4 is sealed.

As described above, when the hall door 2 is in the closed state, the gap G1 between the corresponding hall door 2 and the upper frame 8 of the three-side frame 3 and the gap G2 between the corresponding hall door 2 and the sill 4 are sealed. With this structure, when a fire breaks out in a building, it is possible to suppress the entry of smoke from the elevator hall into the elevator shaft. In this way, the elevator shaft is prevented from acting as a chimney. Thus, avoiding the spread of fire and also preventing the spread of smoke to other floors.

A sealing element 31 is arranged between the elevator hall and the guide groove 27 so as to form a closure therebetween. Thus, even if the through-hole 27a for discharging dust and debris is formed on the bottom surface of the guide groove 27 provided on the sill 4, the smoke in the elevator hall can be suppressed from entering the elevator shaft.

On the other hand, in general, after the passenger cabin reaches the elevator hall, the hall door 2 slides from the closed state to the left and right directions, so that the passage 1 is opened. In this operation, when the hall door 2 starts to move, the rollers 22a and 22b of the sealing mechanism 17 are separated from the concave step portions 24a and 24b of the corresponding roller rolling portion 10a. As shown in FIG. 3B, the rollers 22a and 22b run on the surface of the hanger rail 10 and rotate along the roller rolling portion 10a.

As each of the rollers 22a and 22b moves up onto the surface of the roller rolling portion 10a, due to this movement, the leaf spring 18 is pressed against its own elastic force to the side where the suspension is located. In this way, the sealing member 20 mounted to the lower end edge of the leaf spring 18 is separated from the vertical wall 8a of the upper frame 8 of the three-sided frame 3 and the sealing plate 19 of the corresponding hall door 2 . While maintaining the above state, each hall door 2 moves in the direction to open the passage 1 .

Thus, when each hall door 2 moves, the sealing member 20 and the vertical wall 8a are kept in a non-contact state. Therefore, the hall door 2 can be opened smoothly, and wear of the sealing member 20 can be prevented. In addition, when each hall door 2 moves in the direction of closing the passage 1, the sealing member 20 and the standing wall 8a are continuously kept in a non-contact state. In this way, the hall door 2 can be smoothly closed, and wear of the sealing member 20 can be prevented.

When the hall door 2 reaches the corresponding closing position to close the passageway 1, the rollers 22a and 22b drop into the concave step portions 24a and 24b respectively by virtue of the elastic force of the leaf spring 18. Therefore, the body portion 20a of the sealing element 20 mounted on the lower end edge of the leaf spring 18 is in close contact with the vertical wall 8a of the upper frame 8 of the three-side frame 3, while the tongue portion 20b is in close contact with the sealing plate 19. In this way, the gap G1 between the corresponding hall door 2 and the upper frame 8 of the three-side frame 3 is sealed.

Rollers 22 a and 22 b forming a pair are independently provided at respective left and right ends of the leaf spring 18 . The rollers are arranged to be spaced apart from each other in the front-rear direction, which is the thickness direction of the hall door 2 . With this structure, the rollers 22a and 22b of the hall door 2 are properly engaged with or disengaged from the recessed step portions 24a and 24b respectively corresponding to these rollers. Thus, it is possible to prevent such a mistake that the rollers engage or disengage from the other concave step portions 24b and 24a when the door is moved.

On the other hand, when the hall door 2 is opened from the closed state by moving in the left or right direction, the sealing mechanism 29 provided between the hall door 2 and the sill 4 operates as follows. That is, when the hall door 2 starts to move, the rollers 34 a and 34 b of the sealing mechanism 29 leave from the corresponding concave step portions 35 a and 35 b of the sill 4 . The rollers 34a and 34b are raised onto the surface of the roller rolling portion 4a against the elastic force of the leaf spring 30, and rotate on the surface.

As shown in FIG. 4B , when the rollers 34 a and 34 b run on the surface of the roller rolling portion 4 a , the sealing member 31 moves upward integrally with the rollers 34 a and 34 b and thus separates from the upper surface of the sill 4 . While maintaining this state, each hall door 2 moves in the direction in which the passage 1 is opened.

As described above, when the hall door 2 moves, the sealing member 31 and the sill 4 remain in a non-contact state. In this way, the hall door 2 can move smoothly, and wear of the sealing member 31 can be prevented. In addition, when the hall door 2 When moving in the direction of closing the passage 1, the sealing element 31 and the sill 4 are continuously kept in a non-contact state. In this way, the hall door 2 can be closed smoothly and the sealing element 31 can be prevented from being worn.

When the hall door 2 reaches the corresponding predetermined closing position to close the passageway 1, the rollers 34a and 34b drop into the concave steps 35a and 35b of the roller rolling part 4a respectively by virtue of the elastic force of the leaf spring 30. Therefore, the sealing member 31 is in close contact with the upper surface of the sill 4 . In this way, the gap G2 between the respective hall door 2 and the sill 4 is sealed.

Rollers 34 a and 34 b forming a pair are independently provided at respective left and right ends of the sealing member 31 . The rollers are arranged to be spaced apart from each other in the front-rear direction, which is the thickness direction of the hall door 2 . With this structure, the rollers 34a and 34b are suitably engaged with or separated from the recessed step portions 35a and 35b respectively corresponding to these rollers. Thus, it is possible to prevent such a mistake that the rollers 34a and 34b engage with or move away from the other rollers 34b and 34a, respectively, when the hall door 2 moves.

The sealing mechanism 17 provided on the upper portion of the corresponding hall door 2 can be accommodated in the cavity inside the hanger 13 . With this structure, the height of the door unit is not increased as a whole, so that the size of the door unit can be prevented from increasing.

Simultaneously, the sealing elements 20 and 31 of the sealing mechanism 17 and 29 are in close contact with the side surface of the suspension rail 10 and the upper surface of the sill 4 respectively by means of the elastic force of the leaf spring 18 and the leaf spring 30 . With this structure, the sealing mechanisms 17 and 29 can accurately seal G1 and G2, respectively, without finely adjusting the sealing member 20 and the sealing member 31 during the installation of the sealing mechanism 17 and the sealing mechanism 29 .

In the first embodiment, a pair of rollers 34a and 34b are independently provided at the left and right ends of the sealing member 31 . Here, as a second preferred embodiment, as shown in FIG. 7 , a roller 34 may be provided in the middle of the sealing member 31 . It can be seen in FIG. 7 that the sealing mechanism 29 may have such a structure that when the roller 34 moves in the vertical direction, the sealing member 31 contacts or separates from the upper surface of the sill 4 .

A third embodiment is shown in FIG. 8 . This embodiment provides a variation of the sealing structure for sealing the gap G1 formed between the hall door 2 and the upper frame 8 of the three-side frame 3 . The bracket 11 supporting the hanger guide rail 10 includes a movable plate 40 installed to face the hanger 13 of the corresponding hall door 2 .

The upper end of the movable plate 40 is supported by a pin 41 , which is swingable in a direction away from the hanger 13 . The moving plate 40 is elastically urged in a direction approaching the hanger 13 by means of a spring 42 serving as an elastic member.

A sealing member 45 made of an elastic material such as rubber is mounted on a lower end portion of the movable plate 40 . The sealing element 45 extends in the longitudinal direction of the suspension rail 10 . The sealing member 45 has a hollow body portion 45a and a tongue portion 45b extending downward from the body portion 45a, which are integrally formed. The main body portion 45a is in contact with the seal plate 19 provided at the upper end of the corresponding hall door 2 . The tongue portion 45b is in contact with the inner surface of the vertical wall 8a of the upper frame 8 of the three-side frame 3 .

A roller guide 46 is mounted on the approximately vertical middle portion of the movable plate 40 , facing the hanger 13 . The roller guide 46 extends in the longitudinal direction of the hanger guide 10 . The side surface of the roller guide rail 46 serves as a roller rolling portion 46a. As shown in FIG. 9, the longitudinal partial area of the roller rolling portion 46a is formed as a concave step portion 46b.

A roller 47 is mounted to a side surface of the hanger 13, facing the roller rolling portion 46a. The roller 47 is supported by a support shaft 48 so as to be rotatable in a rotational direction about a vertical axis. The roller rolling portion 46 a is in contact with the roller 47 by the elastic force of the spring 42 .

FIG. 8 shows a state in which the hall door 2 is opened or closed. FIG. 9 shows the positions of the roller rolling portion 46a and the roller 47 in relation to each other. In this figure, a solid line indicates an opening or closing operation, and a two-dot chain line indicates a closed state. As shown by the solid line in FIG. 9, the roller 47 is in contact with the roller rolling portion 46a, and when the hall door 2 is moved to open or close, the roller 47 rotates on the surface of the roller rolling portion 46a.

When the hall door 2 moves, the sealing member 45 remains in a non-contact state with respect to the sealing plate 19 and the vertical wall 8a. With this structure, the hall door 2 can be opened or closed smoothly, and in addition, the wear of the sealing member 45 can be prevented.

When the hall door 2 moves along the suspension member guide rail 10 in the direction of closing the passage and reaches the predetermined closing position to close the passage of the elevator hall, by means of the elastic force of the spring 42, as shown by the two-dot dash line in Figure 9, the roller 47 falls into the concave step portion 46b formed on the roller rolling portion 46a.

Thus, the movable plate 40 pivots about the pin 41 towards the hanger 13 . The spring 42 uses its elastic force to force the main body portion 45a of the sealing member 45 to be in close contact with the sealing plate 19, and makes the tongue portion 45b to be in contact with the vertical wall 8a. In this way, the gap G1 between the corresponding hall door 2 and the upper frame 8 of the three-side frame 3 is sealed.

As described above, when the hall door 2 is in the closed state, the gap G1 formed between the corresponding hall door 2 and the upper frame 8 is sealed. With this structure, when a fire breaks out in a building, it is possible to suppress the entry of smoke from the elevator hall into the elevator shaft. In this way, the elevator shaft is prevented from acting as a chimney. Thus, the spread of fire is avoided and the spread of smoke to other floors is also prevented.

In the case where the hall door 2 moves from the closed state to the opening direction, the roller 47 is relatively raised from the concave step portion 46b to the surface of the roller rolling portion 46a as soon as the hall door 2 starts to move. The movable plate 40 is pressed to pivot in a direction away from the suspension 13 against the force of the spring 42 . In this way, the sealing element 45 is separated from the sealing plate 19 and the leaf spring 18 in a non-contact state. Thus, in the non-contact state, the hall doors 2 can move in the opening direction so that they can be opened smoothly. Furthermore, wear of the sealing element 45 can be prevented. In this way, effects similar to those of the first embodiment can also be obtained by the second and third embodiments.

Each of the above-mentioned embodiments relates to the hall door 2 of the two-way sliding type. Alternatively, as a fourth embodiment, as shown in FIG. 10, the present invention may be applied to a hall door 2 of a one-side sliding type.

It should be noted that the entrance and exit of the passenger cabin of the elevator has a cabin door, an entrance and exit frame and a sill. The cabin door is an elevator door, which corresponds to the hall door arranged at the passenger entrance and exit of the elevator hall. The access frame is a door-adjacent element close to the cabin door, which corresponds to the three-side frame provided at the passenger passage of the elevator hall. The sill supports the bottom of the hatch and serves to guide the opening and closing operations of the door. Thus, a sealing structure can optionally be provided between the hatch and the access frame, that is, a sealing structure having a mechanism similar to that employed in each of the embodiments.

As described above, according to the present invention, the sealing device does not increase the size of the door device, or does not require fine adjustments in the installation of the sealing member. In addition, with the sealing device, the door can be opened and closed smoothly and wear of the sealing element is prevented.

Industrial Applicability

The present invention can be used not only in sealing devices for elevator doors, but also in sliding type doors that require airtight sealing in the closed state.

Claims (7)

1. A sealing device for an elevator, comprising: Elevator doors (2) moving between an open state and a closed state; a door adjacent element (3, 4) arranged around the elevator door (2) in such a way that a gap is formed between the elevator door (2) and the door adjacent element (3, 4); A sealing element (20, 31) arranged on said elevator door (2), which can contact the door adjacent element (3, 4) by means of the elastic force of the elastic element (18, 30), so as to seal by this contact clearance; and Sealing element movement mechanism (17, 29), when the elevator door (2) is opening or closing, this mechanism overcomes the elastic force of the elastic element (18, 30) to make the sealing element (20, 31) relative to the door adjacent element (3 , 4) remain in a non-contact state, and when the door (2) is in a closed state, the sealing element (20, 31) is connected to the door adjacent element (3, 4) by means of the elastic force of the elastic element (18, 30) ) contact, It is characterized by: The elastic element is formed by a leaf spring (18, 30) on which said sealing element (20, 31) is mounted. 2. Sealing device for elevators according to claim 1, characterized in that: The sealing element movement mechanism (17, 29) includes rollers (22a, 22b, 34a, 34b) and roller rolling parts (10, 4) extending in the direction of rotation of the rollers, and the roller rolling parts (10, 4) include region forming recessed steps (24a, 24b, 35a, 35b); When the elevator door (2) is opening or closing, the rollers (22a, 22b, 34a, 34b) are in elastic contact with the roller rolling parts (10, 4) by means of the elastic force of the leaf springs (18, 30), and Up rotation, the sealing element movement mechanism (17, 29) keeps the sealing element (20, 31) in a non-contact state; and When the elevator door (2) is in the closed state and the rollers (22a, 22b, 34a, 34b) fall into the concave step (24a, 24b, 35a, 35b), the elastic force of the leaf spring (18, 30) makes the The sealing elements (20, 31) are in contact with the door adjacent elements (3, 4), and the sealing element movement mechanism (17, 29) seals said gap. 3. Sealing device for elevators according to claim 2, characterized in that: Rollers (22a, 22b, 34a, 34b) and sealing elements (20, 31) are arranged in the elevator door (2), and roller rolling parts (10, 4) are arranged in door adjacent elements (3, 4); When the elevator door (2) is opening or closing, the rollers (22a, 22b, 34a, 34b) are in elastic contact with the roller rolling parts (10, 4) by means of the elastic force of the leaf springs (18, 30), and upward rotation, thereby keeping the sealing element (20, 31) in a non-contact state with respect to the door adjacent element (3, 4); and When the elevator door (2) is in the closed state, the rollers (22a, 22b, 34a, 34b) fall into the concave step (24a, 24b, 35a, 35b), and the elastic force of the leaf spring (18, 30) , bringing the sealing element (20, 31) into contact with the door adjacent element (3, 4), thereby sealing said gap. 4. Sealing device for elevators according to claim 1, characterized in that: The elevator door is a hall door (2) that opens or closes the elevator hall passage, and the door adjacent element is a three-sided frame (3) arranged on the passage; and When the hall door (2) is in a closed state, the sealing element (20) seals the gap formed between the hall door (2) and the upper frame (8) of the three-side frame (3). 5. Sealing device for elevators according to claim 1, characterized in that: The elevator door is a hall door (2) that opens or closes the elevator hall passage, and the door adjacent element is a sill (4) that supports the lower end of the hall door (2) and guides its opening and closing operations; and When the hall door (2) is in a closed state, the sealing element (31) seals the gap formed between the hall door (2) and the sill (4). 6. Sealing device for elevators according to claim 1, characterized in that: The elevator door is a door that opens or closes the elevator passenger cabin passage, and the door adjacent element is a passage frame arranged on the passenger cabin passage; and The sealing element seals the gap formed between the door and the passageway when the door is in the closed state. 7. Sealing device for elevators according to claim 1, characterized in that: The elevator door is the door that opens or closes the passage to the elevator passenger compartment, and the door adjacent element is the sill that supports the lower end of the door and guides its opening and closing operations; and The sealing element seals the gap formed between the door and the sill when the door is in the closed state.

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