Landing doorway device for elevator

Abstract

In the present invention, a one-side claw part of a one-side door opening prevention tool and another-side claw part of another-side door opening prevention tool are such that the positional relationship thereof in the width direction of a landing doorway is inverse between a state in which the landing door has closed the landing doorway and a state in which the landing door has opened the landing doorway. The other-side claw part is provided so as to be movable downward, and is restricted from moving further downward by the stopper. Before the stopper melts, the landing door is not restricted from moving in the width direction of the landing doorway, and when the stopper melts, the landing door is restricted from moving in the width direction of the landing doorway as a result of the other-side claw part moving downward so that the the one-side claw part and the other-side claw part face each other in the width direction of the landing doorway.

Description

Elevator landing entrance / exit device

[0001] The present invention relates to an elevator hall entrance / exit device.

[0002] Conventionally, at the entrance and exit of a landing, when the door is closed, a shielding plate is provided that forms a curved labyrinth-shaped gap between the sliding door and the landing jamb and between the end faces of the sliding doors, forming a fire spread prevention structure and constituting a smoke and flame barrier structure that prevents the fire from spreading from the landing to the elevator shaft in the event of a fire in the building (see Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2003-012256

[0004] However, if a fire breaks out at a landing, the air pressure at the landing rises, and even if the sliding doors close the entrance to the landing, gaps widen between adjacent sliding doors and between the sliding doors and the vertical frames of the three-sided jamb, allowing flames and high-temperature gases from the landing to seep into the elevator shaft through these gaps, making it easier for the fire to spread from the landing into the elevator shaft.

[0005] The present disclosure has been made to solve the above-mentioned problems, and aims to provide an elevator landing entrance / exit device that can improve fire prevention performance by preventing fire from spreading from the landing to the hoistway.

[0006] The elevator landing entrance / exit device according to the present disclosure includes a landing jamb, one or more landing doors, and a door opening prevention device, the landing jamb forms a landing entrance / exit that connects the elevator shaft and the landing, the landing door moves in the width direction of the landing entrance / exit to open and close the landing entrance / exit, the door opening prevention device has a pair of door opening prevention devices, one side door opening prevention device and the other side door opening prevention device, and a stopper, the one side door opening prevention device is provided on the hoistway side of the first landing door that is the landing door, and has a one side claw portion, and the other side door opening prevention device is a second landing door which is a landing three-sided jamb or a landing door, the second landing door being provided on the side of the elevator shaft, and having a second-side claw portion, the positional relationship in the width direction of the landing entrance between the first-side claw portion and the second-side claw portion being reversed between a state in which the landing door closes the landing entrance and a state in which the landing door opens the landing entrance, the movable claw portion which is the first-side claw portion or the second-side claw portion being provided so as to be movable downward, and further the downward movement being restricted by a stopper, the stopper melting at a temperature lower than the temperatures at which the landing three-sided jamb, the landing door, the first-side door opening prevention device and the second-side door opening prevention device melt, Before the stopper melts, the one-side claw portion and the other-side claw portion do not face each other in the width direction of the landing entrance / exit, and therefore the movement of the landing door in the width direction of the landing entrance / exit is not restricted, and when the stopper melts, the movable claw portion moves downward and the one-side claw portion and the other-side claw portion face each other in the width direction of the landing entrance / exit, and therefore the movement of the landing door in the width direction of the landing entrance / exit is restricted.

[0007] According to the elevator landing entrance / exit device of the present disclosure, when a fire breaks out at a landing, the landing doors are restricted from moving from a state in which the landing entrance / exit is closed, thereby suppressing the widening of the gap at the landing entrance / exit, thereby improving fire prevention performance that prevents the fire from spreading from the landing to the elevator shaft.

[0008] 14 is a front view of a landing entrance / exit in Embodiment 1. FIG. 15 is a rear view of the landing entrance / exit in Embodiment 1. FIG. 16 is a view taken along arrows A-A in FIG. 2. FIG. 17 is a front view of a landing entrance / exit in Embodiment 2. FIG. 18 is a rear view of the landing entrance / exit in Embodiment 2. FIG. 19 is a view taken along arrows E-E in FIG. 5. FIG. 19 is a front view of a landing entrance / exit in Embodiment 3. FIG. 20 is a rear view of a landing entrance / exit in Embodiment 3. FIG. 21 is a view taken along arrows F-F in FIG. 8. FIG. 22 is a view taken along arrows B in FIGS. 3 and 6. FIG. 23 is a view taken along arrows G in FIG. 9. FIG. 24 is a view taken along arrows H-H in FIGS. 10 and 11. FIG. 25 is a view taken along arrows J-J in FIGS. 10 and 11. FIG. 26 is a view taken along arrows C in FIGS. 3 and 9. FIG. 27 is a view taken along arrows K-K in FIG. 24. FIG. 28 is a view taken along arrows L-L in FIG. 25. FIG. 29 is a view taken along arrows M-M in FIG. 30. FIG. 31 is a view taken along arrows M-M in FIG. 31. 20 is a view taken along the line N-N in FIG. 20. FIG. 21 is a view of a main part in embodiment 6. FIG. 22 is a view taken along the line P-P in FIG. 22. FIG. 22 is a view taken along the line Q-Q in FIG.

[0009] Hereinafter, preferred embodiments of an elevator hall entrance / exit device according to the present disclosure will be described with reference to the drawings. The same reference numerals throughout the drawings indicate the same or corresponding parts.

[0010] The elevator hall entrance / exit device according to the first embodiment will be described with reference to FIGS. 1 to 3, 10, and 12 to 17.

[0011] FIG. 1 is a front view of the landing entrance / exit 4 in the first embodiment. FIG. 1 is a drawing of the landing entrance / exit 4 as seen from the landing 2 side. FIG. 2 is a rear view of the landing entrance / exit 4 in the first embodiment. FIG. 2 is a drawing of the landing entrance / exit 4 as seen from the elevator shaft 1 side. FIG. 3 is a drawing as seen from the A-A arrows in FIG. 2. In FIG. 3, portions C' and D' are symmetrical to portions C and D with respect to the center of the width direction of the landing entrance / exit 4. In FIGS. 1 to 3, the landing doors 9, 9', 10, and 10' close the landing entrance / exit 4. FIG. 10 is a drawing of portion B in FIG. 3. FIG. 10 shows the state when the door-opening prevention device 20 is installed. FIG. 12 is a drawing as seen from the H-H arrows in FIG. 10. FIG. 12(a) shows the state when the door-opening prevention device 20 is installed. FIG. 12(b) shows the state when the door-opening prevention device 20 is activated. FIG. 13 is a view seen from the arrows J-J in FIG. 10. FIG. 13(a) shows the state of the door-opening prevention device 20 when installed. FIG. 13(b) shows the state of the door-opening prevention device 20 when activated. FIG. 14 is a view of part C in FIG. 3. FIG. 14 shows the state of the door-opening prevention device 20 when installed. FIG. 15 is a view seen from the arrows K-K in FIG. 14. FIG. 15(a) shows the state of the door-opening prevention device 20 when installed. FIG. 15(b) shows the state of the door-opening prevention device 20 when activated. FIG. 16 is a view of part D in FIG. 3. FIG. 16 shows the state of the door-opening prevention device 20 when installed. FIG. 17 is a view seen from the arrows L-L in FIG. 16. FIG. 17(a) shows the state of the door-opening prevention device 20 when installed. FIG. 17(b) shows the state of the door-opening prevention device 20 when activated.

[0012] An elevator shaft 1 is provided across multiple floors of a building in which an elevator is installed. An elevator car ascends and descends within the elevator shaft 1. A landing 2 is provided at the floor where the car stops. The landing 2 is located next to the elevator shaft 1. The elevator shaft 1 and the landing 2 are separated by a wall 3. The wall 3 has an opening 3a formed therein. The opening 3a connects the elevator shaft 1 and the landing 2.

[0013] The landing entrance / exit 4 is located inside the opening 3a. The hoistway 1 and the landing 2 are aligned in the depth direction of the landing entrance / exit 4. The hoistway 1 and the landing 2 are in communication with each other in the depth direction of the landing entrance / exit 4 via the landing entrance / exit 4. The landing entrance / exit 4 is formed by a landing jamb 5 and a landing threshold 6. The landing jamb 5 has vertical frames 7 and 7' and an upper frame 8. The vertical frame 7 forms one side in the width direction of the landing entrance / exit 4. The vertical frame 7' forms the other side in the width direction of the landing entrance / exit 4. The upper frame 8 forms the upper part of the landing entrance / exit 4. The upper frame 8 is connected to the upper part of the vertical frame 7 and the upper part of the vertical frame 7'. The landing threshold 6 forms the lower part of the landing entrance / exit 4.

[0014] The vertical frames 7 and 7' are formed as follows.

[0015] The vertical frame 7 is formed of a plate-shaped member. The vertical frame 7 has a recessed portion 7a, a visible portion 7b, a flare portion 7c, and an end portion 7d. The recessed portion 7a, the visible portion 7b, the flare portion 7c, and the end portion 7d extend in the vertical direction.

[0016] The projection portion 7a extends in the depth direction of the landing entrance / exit 4 and forms the width of the landing entrance / exit 4. The visible portion 7b extends from the end of the projection portion 7a on the side of the landing 2 to the side opposite the landing entrance / exit 4 in the width direction of the landing entrance / exit 4. The spillover portion 7c extends from the end of the projection portion 7b on the side opposite the landing entrance / exit 4 to the hoistway 1 side in the depth direction of the landing entrance / exit 4. The facing portion 7d extends from the end of the projection portion 7a on the side of the hoistway 1 in the width direction of the landing entrance / exit 4 to the side opposite the landing entrance / exit 4.

[0017] The cross section of the vertical frame 7 is formed in a groove shape that opens toward the side opposite the landing entrance 4, so that the inside of the vertical frame 7 is connected to the elevator shaft 1.

[0018] The vertical frame 7' is provided symmetrically to the vertical frame 7 with respect to the center in the width direction of the landing entrance / exit 4. The projection portion 7a', the visible portion 7b', the scattering portion 7c', and the end portion 7d' of the vertical frame 7' correspond to the projection portion 7a, the visible portion 7b, the scattering portion 7c, and the end portion 7d of the vertical frame 7, respectively.

[0019] The vertical frames 7 and 7' are formed as described above.

[0020] The landing entrance 4 is opened and closed by the landing doors 9, 9', 10, and 10' as described below.

[0021] The landing doors 9, 9', 10, and 10' are located on the hoistway 1 side of the landing jamb 5 in the depth direction of the landing entrance 4. The landing doors 9, 9', 10, and 10' are located above the landing threshold 6.

[0022] The landing door 10 is located on the hoistway 1 side of the vertical frame 7 in the depth direction of the landing entrance 4. The landing door 9 is located on the hoistway 1 side of the landing door 10 in the depth direction of the landing entrance 4. The landing door 10' is located on the hoistway 1 side of the vertical frame 7' in the depth direction of the landing entrance 4. The landing door 9' is located on the hoistway 1 side of the landing door 10' in the depth direction of the landing entrance 4.

[0023] The landing doors 9 and 10 do not face the vertical frame 7 in the width direction of the landing entrance / exit 4. The landing doors 9 and 10 do not face each other in the width direction of the landing entrance / exit 4. The landing doors 9' and 10' do not face each other in the width direction of the landing entrance / exit 4 with the vertical frame 7'. The landing doors 9' and 10' do not face each other in the width direction of the landing entrance / exit 4. The landing doors 9 and 9' face each other in the width direction of the landing entrance / exit 4. The landing doors 10 and 10' face each other in the width direction of the landing entrance / exit 4.

[0024] The landing doors 9, 9', 10, and 10' open and close the landing entrance 4 by moving in the width direction of the landing entrance 4. The landing doors 9 and 10 move from the center of the landing entrance 4 in the width direction along the side of the vertical frame 7. The landing doors 9' and 10' move from the center of the landing entrance 4 in the width direction along the side of the vertical frame 7'. The landing doors 9 and 10 move in the same direction in the width direction of the landing entrance 4. The landing doors 9 and 10 and the landing doors 9' and 10' move in opposite directions in the width direction of the landing entrance 4. The landing doors 9 and 10 open and close the landing entrance 4 by moving between the inside and outside of the landing entrance 4 at the vertical frame 7 in the width direction of the landing entrance 4. The landing doors 9 ′ and 10 ′ open and close the landing entrance 4 by moving between the inside and outside of the landing entrance 4 at the vertical frame 7 ′ in the width direction of the landing entrance 4 .

[0025] When the landing doors 9, 9', 10, and 10' close the landing entrance 4, the landing doors 9, 9', 10, and 10' are located inside the landing entrance 4. When the landing doors 9, 9', 10, and 10' open the landing entrance 4, the landing doors 9, 9', 10, and 10' are located outside the landing entrance 4 and are not located inside the landing entrance 4.

[0026] When the car ascends or descends in the hoistway 1 and arrives at the landing 2, the car entrance and the landing entrance 4 face each other, and the landing doors 9, 9', 10, and 10' open and close the landing entrance 4. When the landing doors 9, 9', 10, and 10' open the landing entrance 4, elevator users move between the inside of the car and the landing 2 through the car entrance and the landing entrance 4. When the car has not yet arrived at the landing 2, the landing doors 9, 9', 10, and 10' close the landing entrance 4.

[0027] The landing entrance 4 is opened and closed by the landing doors 9, 9', 10, and 10' as described above.

[0028] The landing doors 9, 9', 10, and 10' are formed as follows.

[0029] The landing door 9 is formed of a plate-shaped member. The landing door 9 has a front surface 9a, side surfaces 9b and 9c, and return surfaces 9d and 9e. The front surface 9a, the side surfaces 9b and 9c, and the return surfaces 9d and 9e extend in the vertical direction.

[0030] The front surface portion 9a extends in the width direction of the landing entrance 4. The side surface portion 9b extends from the door-tip side end of the landing door 9 in the front surface portion 9a toward the hoistway 1 in the depth direction of the landing entrance 4. The side surface portion 9c extends from the door-tail side end of the landing door 9 in the front surface portion 9a toward the hoistway 1 in the depth direction of the landing entrance 4. The returned portion 9d extends from the end of the side surface portion 9b on the hoistway 1 side toward the door-tip side of the landing door 9 in the width direction of the landing entrance 4. The returned portion 9e extends from the end of the side surface portion 9c on the hoistway 1 side toward the door-tip side of the landing door 9 in the width direction of the landing entrance 4.

[0031] The front surface 9 a, the side surface 9 b, and the return portion 9 d form the door tip portion of the landing door 9. The cross section of the door tip portion of the landing door 9 has a groove shape that opens toward the door tail side of the landing door 9, so that the inside of the door tip portion of the landing door 9 is connected to the elevator shaft 1.

[0032] The front surface 9 a, the side surface 9 c, and the return portion 9 e form a door tail portion of the landing door 9. The cross section of the door tail portion of the landing door 9 has a groove shape that opens toward the door tip side of the landing door 9, so that the inside of the door tail portion of the landing door 9 is connected to the elevator shaft 1.

[0033] The landing door 9' is formed symmetrically to the landing door 9 in the width direction at the landing entrance / exit 4. A front surface 9a', side surfaces 9b' and 9c', and return portions 9d' and 9e' of the landing door 9' correspond to the front surface 9a, side surfaces 9b and 9c, and return portions 9d and 9e of the landing door 9, respectively.

[0034] The landing door 10 is formed in the same manner as the landing door 9. A front surface 10a, side surfaces 10b and 10c, and return portions 10d and 10e of the landing door 10 correspond to the front surface 9a, side surfaces 9b and 9c, and return portions 9d and 9e of the landing door 9, respectively.

[0035] The landing door 10′ is formed symmetrically to the landing door 10 in the width direction at the landing entrance / exit 4. The front surface 10a′, side surfaces 10b′ and 10c′, and return portions 10d′ and 10e′ of the landing door 10′ correspond to the front surface 10a, side surfaces 10b and 10c, and return portions 10d and 10e of the landing door 10, respectively.

[0036] The landing doors 9, 9', 10 and 10' are formed as described above.

[0037] When the landing doors 9, 9', 10, and 10' close the landing doorway 4, the landing doors 9, 9', 10, and 10' are positioned as follows.

[0038] The landing doors 9 and 10 are located on the side of the vertical frame 7 at the landing entrance 4 in the width direction of the landing entrance 4. The landing door 9 is farther from the vertical frame 7 than the landing door 10. The landing door 10 is closer to the vertical frame 7 than the landing door 9. The landing door 10 is located between the vertical frame 7 and the landing door 9 in the width direction of the landing entrance 4.

[0039] The landing doors 9' and 10' are located on the side of the vertical frame 7' at the landing entrance 4 in the width direction of the landing entrance 4. The landing door 9' is farther from the vertical frame 7' than the landing door 10'. The landing door 10' is closer to the vertical frame 7' than the landing door 9'. The landing door 10' is located between the vertical frame 7' and the landing door 9' in the width direction of the landing entrance 4.

[0040] The door leading edge of the landing door 9 and the door leading edge of the landing door 9' abut in the width direction of the landing entrance / exit 4. The gap between the door leading edge of the landing door 9 and the door leading edge of the landing door 9' is not sealed, and a gap 11a may occur. The gap 11a is located between a side surface portion 9b of the landing door 9 and a side surface portion 9b' of the landing door 9'. The gap 11a extends in the depth direction of the landing entrance / exit 4. The door leading edge of the landing door 10 and the door leading edge of the landing door 10' are spaced apart in the width direction of the landing entrance / exit 4.

[0041] The door end portion of the landing door 9 is located on the elevator shaft 1 side of the door tip portion of the landing door 10 in the depth direction of the landing entrance 4. A front surface portion 9a of the door end portion of the landing door 9 faces a return portion 10d of the door tip portion of the landing door 10 in the depth direction of the landing entrance 4. A gap 12a is provided between the front surface portion 9a of the door end portion of the landing door 9 and the return portion 10d of the door tip portion of the landing door 10 in the depth direction of the landing entrance 4. The gap 12a extends in the width direction of the landing entrance 4.

[0042] The door end portion of the landing door 10 is located on the hoistway 1 side of the vertical frame 7 in the depth direction of the landing entrance / exit 4. A front surface portion 10a of the door end portion of the landing door 10 faces the end portion 7d of the vertical frame 7 in the depth direction of the landing entrance / exit 4. A gap 13a is provided between the front surface portion 10a of the door end portion of the landing door 10 and the end portion 7d of the vertical frame 7 in the depth direction of the landing entrance / exit 4. The gap 13a extends in the width direction of the landing entrance / exit 4.

[0043] The landing door 9' is positioned symmetrically to the landing door 9 with respect to the center in the width direction of the landing entrance 4. The landing door 10' is positioned symmetrically to the landing door 10 with respect to the center in the width direction of the landing entrance 4.

[0044] A gap 12a' is provided between a front surface portion 9a' of the door end portion of the landing door 9' and a return portion 10d' of the door tip portion of the landing door 10' in the depth direction of the landing entrance 4. The gap 12a' extends in the width direction of the landing entrance 4.

[0045] A gap 13a' is provided between a front surface portion 10a' of the door end portion of the landing door 10' and an end return portion 7d' of the vertical frame 7' in the depth direction of the landing entrance / exit 4. The gap 13a' extends in the width direction of the landing entrance / exit 4.

[0046] When the landing doors 9, 9', 10, and 10' close the landing doorway 4, the landing doors 9, 9', 10, and 10' are positioned as described above.

[0047] The landing doors 9, 9', 10, and 10' are guided in their movement in the width direction of the landing entrance 4 as follows.

[0048] The landing doors 9 , 9 ′, 10 , and 10 ′ are guided in their movement in the width direction of the landing entrance / exit 4 by the landing door opening / closing device 14 and the landing threshold 6 .

[0049] The landing door opening and closing device 14 is located on the wall 3 side of the elevator shaft 1. The landing door opening and closing device 14 is located above the landing entrance 4.

[0050] The landing door opening and closing device 14 includes rails 14a and 14b, a hanger 14c, a roller 14d, a first interlocking mechanism, a second interlocking mechanism, and a third interlocking mechanism.

[0051] The rails 14a and 14b extend in the width direction of the landing entrance 4. The rail 14a is provided for the landing doors 9 and 9'. The rail 14b is provided for the landing doors 10 and 10'.

[0052] The hangers 14c are attached to the upper parts of the landing doors 9, 9', 10, and 10'. The rollers 14d are rotatably attached to the hangers 14c. The rollers 14d attached to the hangers 14c at the upper parts of the landing doors 9 and 9' are placed on the rails 14a. The rollers 14d attached to the hangers 14c at the upper parts of the landing doors 10 and 10' are placed on the rails 14b.

[0053] The landing threshold 6 has grooves 6a and 6b. The grooves 6a and 6b extend in the width direction of the landing entrance 4. The groove 6a is provided for the landing doors 9 and 9'. The groove 6b is provided for the landing doors 10 and 10'.

[0054] The landing doors 9, 9', 10, and 10' have door legs 15 attached to their lower parts. The door legs 15 attached to the lower parts of the landing doors 9 and 9' are inserted into the groove portions 6a. The door legs 15 attached to the lower parts of the landing doors 10 and 10' are inserted into the groove portions 6b.

[0055] The landing doors 9 and 9' are suspended from the rail 14a via hangers 14c and rollers 14d. The landing doors 9 and 9' are fitted into the groove 6a of the landing threshold 6 via the door legs 15. The landing doors 9 and 9' move along the rail 14a and the groove 6a. The landing doors 9 and 9' are guided in their movement in the width direction of the landing entrance / exit 4 by the rail 14a and the groove 6a.

[0056] The landing doors 10 and 10' are suspended from the rail 14b via hangers 14c and rollers 14d. The landing doors 10 and 10' are fitted into the groove 6b of the landing threshold 6 via the door legs 15. The landing doors 10 and 10' move along the rail 14b and the groove 6b. The landing doors 10 and 10' are guided in their movement in the width direction of the landing entrance / exit 4 by the rail 14b and the groove 6b.

[0057] The landing doors 9 and 10 are connected by a first interlocking mechanism. The landing doors 9 and 10 are interlocked by the first interlocking mechanism. When the landing doors 9 and 10 open and close the landing entrance 4, the landing door 9 moves at a speed faster than the speed of the landing door 10. When the landing doors 9 and 10 open and close the landing entrance 4, the landing door 9 moves at a speed that is twice the speed of the landing door 10, for example.

[0058] The landing doors 9 and 9' are connected by a second interlocking mechanism. The landing doors 9 and 9' are interlocked by the second interlocking mechanism. When the landing doors 9 and 9' open and close the landing entrance 4, the landing doors 9 and 9' move at the same speed.

[0059] The landing doors 9' and 10' are connected by a third interlocking mechanism. The landing doors 9' and 10' are interlocked by the third interlocking mechanism. When the landing doors 9' and 10' open and close the landing entrance 4, the landing door 9' moves at a speed faster than the speed of the landing door 10'. When the landing doors 9' and 10' open and close the landing entrance 4, for example, the landing door 9' moves at a speed twice as fast as the speed of the landing door 10'.

[0060] The landing door opening and closing device 14 has a locking device.

[0061] When the car has not arrived at the landing 2, the locking device is in a locked state. When the car has not arrived at the landing 2, the landing doors 9, 9', 10, and 10' close the landing entrance 4, and the upper parts of the landing doors 9, 9', 10, and 10' are restricted by the locking device from moving toward the side that opens the landing entrance 4. For example, the upper part of the landing door 9 is directly restricted by the locking device from moving toward the side that opens the landing entrance 4, the upper part of the landing door 10 is indirectly restricted by the locking device via the first interlocking mechanism from moving toward the side that opens the landing entrance 4, the upper part of the landing door 9' is indirectly restricted by the locking device via the second interlocking mechanism from moving toward the side that opens the landing entrance 4, and the upper part of the landing door 10' is indirectly restricted by the locking device via the third interlocking mechanism from moving toward the side that opens the landing entrance 4.

[0062] When the elevator car arrives at the landing 2, the locking device is unlocked. When the elevator car arrives at the landing 2, the upper parts of the landing doors 9, 9′, 10, and 10′ are not restricted by the locking device from moving toward the side that opens the landing entrance / exit 4.

[0063] The landing doors 9, 9', 10, and 10' are guided in their movement in the width direction of the landing entrance / exit 4 as described above.

[0064] Next, a description will be given of the door opening prevention device 20. The door opening prevention device 20 is provided as follows.

[0065] The door opening prevention device 20 includes a pair of door opening prevention devices 21 and 22, a pair of door opening prevention devices 23 and 24, a pair of door opening prevention devices 23' and 24', a pair of door opening prevention devices 25 and 26, a pair of door opening prevention devices 25' and 26', a plurality of screw members 27, and a plurality of fasteners 28.

[0066] The door opening prevention device 21 is provided on the elevator shaft 1 side of the landing door 9. The door opening prevention device 21 is attached to the landing door 9. The door opening prevention device 21 is located on the door tip side of the landing door 9.

[0067] The door opening prevention device 21 is formed of a plate-shaped material. The door opening prevention device 21 has an attachment plate 21 a, a shielding plate 21 b, and a plurality of claws 21 c. The attachment plate 21 a and the shielding plate 21 b extend in the vertical direction from near the upper end to near the lower end of the landing door 9.

[0068] The mounting plate 21a extends in the width direction of the landing entrance 4 along the outer side surface of the landing door 9 at a return portion 9d at the door tip portion of the landing door 9. The mounting plate 21a does not extend to the landing door 9' in the width direction of the landing entrance 4. The mounting plate 21a is attached to the return portion 9d at the door tip portion of the landing door 9 with a screw member 27.

[0069] The shielding plate 21b extends from the end of the mounting plate 21a on the side of the landing door 9'. The shielding plate 21b extends from the outer side surface of the landing door 9 at the return portion 9d of the door tip portion of the landing door 9. The shielding plate 21b extends toward the landing door 9' in the width direction of the landing entrance 4. The shielding plate 21b is located on the side opposite the landing 2 at the return portion 9d' of the door tip portion of the landing door 9'. The shielding plate 21b faces the return portion 9d' of the door tip portion of the landing door 9' in the depth direction of the landing entrance 4. A gap 11b is provided between the shielding plate 21b and the return portion 9d' of the door tip portion of the landing door 9' in the depth direction of the landing entrance 4. The gap 11b extends in the width direction of the landing entrance 4.

[0070] The claw portion 21c protrudes from the end of the shielding plate 21b on the side of the landing door 9'. The claw portion 21c protrudes in the depth direction of the landing entrance 4 on the side opposite the landing 2. The multiple claw portions 21c are lined up and spaced apart from one another in the vertical direction. The door-opening prevention device 21 is provided with through-portions 21d above the claw portions 21c. The claw portions 21c and the through-portions 21d are lined up alternately in the vertical direction. The claw portions 21c and the through-portions 21d are provided across the vicinity of the upper end and the lower end of the landing door 9 in the vertical direction.

[0071] The door opening prevention device 22 is provided on the side of the landing door 9' facing the elevator shaft 1. The door opening prevention device 22 is attached to the landing door 9'. The door opening prevention device 22 is located on the door tip side of the landing door 9'.

[0072] The door opening prevention device 22 is formed of a plate-shaped material. The door opening prevention device 22 has an attachment plate 22a, shielding plates 22b and 22c, and a plurality of claws 22d. The attachment plate 22a and the shielding plates 22b and 22c extend in the vertical direction from near the upper end to near the lower end of the landing door 9′.

[0073] The mounting plate 22a extends in the width direction of the landing doorway 4 along the outer side surface of the landing door 9' at the return portion 9d' at the door tip portion of the landing door 9'. The mounting plate 22a does not extend in the width direction of the landing doorway 4 to the landing door 9. The mounting plate 22a is attached to the return portion 9d' at the door tip portion of the landing door 9' with screw members 27 and fasteners 28.

[0074] The mounting plate 22a is provided with a plurality of elongated holes 22e. The longitudinal direction of the elongated holes 22e is oriented in the vertical direction. The screw members 27 are passed through the elongated holes 22e and screwed into the return portions 9d' at the door tip of the landing door 9'. The screw members 27 are passed through the elongated holes 22e at a position lower than the upper end thereof. The stoppers 28 are sandwiched between the mounting plate 22a and the heads 27a of the screw members 27.

[0075] That is, the door-opening prevention device 22 is attached to the landing door 9' so as to be movable downward, and furthermore, the downward movement is restricted by the stopper 28.

[0076] The shielding plate 22b extends from the end of the mounting plate 22a on the side of the landing door 9. The shielding plate 22b extends from the outer side surface of the landing door 9' at the return portion 9d' of the door tip portion of the landing door 9'. The shielding plate 22b extends on the side opposite the landing 2 in the depth direction of the landing entrance 4. The shielding plate 22b is located on the side of the shielding plate 21b opposite the landing door 9 in the width direction of the landing entrance 4. The shielding plate 22b faces the shielding plate 21b in the width direction of the landing entrance 4. A gap 11c is provided between the shielding plate 22b and the shielding plate 21b in the width direction of the landing entrance 4. The gap 11c extends in the depth direction of the landing entrance 4.

[0077] The shielding plate 22c extends from the end of the shielding plate 22b on the side opposite to the landing 2. The shielding plate 22c extends toward the landing door 9 in the width direction of the landing entrance 4. The shielding plate 22c is located on the side of the shielding plate 21b opposite to the landing 2. The shielding plate 22c faces the shielding plate 21b in the depth direction of the landing entrance 4. A gap 11d is provided between the shielding plate 22c and the shielding plate 21b in the depth direction of the landing entrance 4. The gap 11d extends in the width direction of the landing entrance 4.

[0078] Gaps 11a, 11b, 11c, and 11d are connected to each other and form a labyrinth-shaped gap 11 that bends at multiple points. Labyrinth-shaped gap 11 bends at the connection between gaps 11a and 11b, the connection between gaps 11b and 11c, and the connection between gaps 11c and 11d.

[0079] The claw portion 22d protrudes from the end of the shielding plate 22c on the side of the landing door 9. The claw portion 22d protrudes toward the landing 2 in the depth direction of the landing entrance 4. The claw portion 22d is positioned closer to the landing door 9 in the width direction of the landing entrance 4 than the claw portion 21c. The multiple claw portions 22d are lined up and spaced apart from each other in the vertical direction. The door-opening prevention device 22 is provided with through portions 22f below the claw portions 22d. The claw portions 22d and the through portions 22f are lined up alternately in the vertical direction. The claw portions 22d and the through portions 22f are provided across the vicinity of the upper end and the lower end of the landing door 9' in the vertical direction.

[0080] The claw portion 22d does not face the claw portion 21c in the width direction of the landing entrance 4. When the landing doors 9 and 9' open the landing entrance 4, the claw portion 22d passes through the through portion 21d, and the claw portion 21c passes through the through portion 22f. The landing doors 9 and 9' are not restricted in their movement by the claw portions 21c and 22d from a state in which the landing entrance 4 is closed to a side in which the landing entrance 4 is opened. The positional relationship between the claw portion 21c and the claw portion 22d in the width direction of the landing entrance 4 is reversed between a state in which the landing doors 9 and 9' close the landing entrance 4 and a state in which the landing doors 9 and 9' open the landing entrance 4.

[0081] The door opening prevention device 23 is provided on the elevator shaft 1 side of the landing door 10. The door opening prevention device 23 is formed integrally with the landing door 10 by extending a member of the landing door 10. The door opening prevention device 23 is located on the door tip side of the landing door 10.

[0082] The door opening prevention device 23 is formed of a plate-shaped material and has a plurality of claw portions 23a.

[0083] The claw portion 23a protrudes from the end of the landing door 10 on the tail side of the landing door 10 at the return portion 10d of the door tip portion of the landing door 10. The claw portion 23a protrudes toward the landing 2 in the depth direction of the landing entrance 4. The multiple claw portions 23a are lined up and spaced apart from each other in the vertical direction. The door-opening prevention device 23 has through portions 23b provided above the claw portions 23a. The claw portions 23a and the through portions 23b are lined up alternately in the vertical direction. The claw portions 23a and the through portions 23b are provided across the vicinity of the upper end and the lower end of the landing door 10 in the vertical direction.

[0084] The door opening prevention device 24 is provided on the elevator shaft 1 side of the landing door 9. The door opening prevention device 24 is attached to the landing door 9. The door opening prevention device 24 is located on the door trailing edge side of the landing door 9.

[0085] The door opening prevention device 24 is formed of a plate-shaped material. The door opening prevention device 24 has an attachment plate 24a, shielding plates 24b and 24c, and a plurality of claws 24d. The attachment plate 24a and the shielding plates 24b and 24c extend vertically from near the upper end to near the lower end of the landing door 9.

[0086] The mounting plate 24a extends in the depth direction of the landing entrance 4 along the outer side surface of the landing door 9 at the side surface portion 9c of the door trailing edge of the landing door 9. The mounting plate 24a is attached to the side surface portion 9c of the door trailing edge of the landing door 9 by screw members 27 and fasteners 28.

[0087] The mounting plate 24a is provided with an elongated hole 24e. The longitudinal direction of the elongated hole 24e is oriented in the vertical direction. A screw member 27 is passed through the elongated hole 24e and screwed into a side surface portion 9c of the door trailing edge portion of the landing door 9. The screw member 27 is passed through a lower portion of the elongated hole 24e than the upper end portion. A stopper 28 is sandwiched between the mounting plate 24a and a head 27a of the screw member 27.

[0088] That is, the door-opening prevention device 24 is attached to the landing door 9 so as to be movable downward, and furthermore, its downward movement is restricted by the stopper 28 .

[0089] The shielding plate 24b extends from the end of the mounting plate 24a on the landing 2 side. The shielding plate 24b extends from the outer side surface of the landing door 9 at the side surface portion 9c of the door end portion of the landing door 9. The shielding plate 24b extends to the landing 2 side in the depth direction of the landing entrance / exit 4. The shielding plate 24b is located on the door end side of the landing door 10 at the return portion 10d of the door end portion of the landing door 10 in the width direction of the landing entrance / exit 4. The shielding plate 24b faces the return portion 10d of the door end portion of the landing door 10 in the width direction of the landing entrance / exit 4. A gap 12b is provided between the shielding plate 24b and the return portion 10d of the door end portion of the landing door 10 in the width direction of the landing entrance / exit 4. The gap 12b extends in the depth direction of the landing entrance / exit 4.

[0090] The shielding plate 24c extends from the end of the shielding plate 24b on the landing 2 side. The shielding plate 24c extends toward the door tip of the landing door 10 in the width direction of the landing entrance / exit 4. The shielding plate 24c is located inside the door tip portion of the landing door 10. The shielding plate 24c is located on the landing 2 side of the return portion 10d of the door tip portion of the landing door 10 in the depth direction of the landing entrance / exit 4. The shielding plate 24c faces the return portion 10d of the door tip portion of the landing door 10 in the depth direction of the landing entrance / exit 4. A gap 12c is provided between the shielding plate 24c and the return portion 10d of the door tip portion of the landing door 10 in the depth direction of the landing entrance / exit 4. The gap 12c extends in the width direction of the landing entrance / exit 4.

[0091] The gaps 12a, 12b, and 12c are connected to each other to form a labyrinth-shaped gap 12 that bends at multiple points. The labyrinth-shaped gap 12 bends at the connection between the gaps 12a and 12b and at the connection between the gaps 12b and 12c.

[0092] The claw portion 24d protrudes from the end of the shielding plate 24c on the door tip side of the landing door 10. The claw portion 24d protrudes on the side opposite the landing 2 in the depth direction of the landing entrance 4. The claw portion 24d is positioned closer to the door tip side of the landing door 10 in the width direction of the landing entrance 4 than the claw portion 23a. The multiple claw portions 24d are lined up and spaced apart from each other in the vertical direction. The door opening prevention device 24 is provided with penetration portions 24f below the claw portions 24d. The claw portions 24d and the penetration portions 24f are lined up alternately in the vertical direction. The claw portions 24d and the penetration portions 24f are provided across the vicinity of the upper end and the lower end of the landing door 9 in the vertical direction.

[0093] The claw portion 24d does not face the claw portion 23a in the width direction of the landing entrance 4. When the landing doors 9 and 10 open the landing entrance 4, the claw portion 24d passes through the through portion 23b, and the claw portion 23a passes through the through portion 24f. The landing doors 9 and 10 are not restricted in their movement by the claw portions 23a and 24d from a state in which the landing entrance 4 is closed to a side in which the landing entrance 4 is opened. The positional relationship between the claw portion 23a and the claw portion 24d in the width direction of the landing entrance 4 is reversed between a state in which the landing doors 9 and 10 close the landing entrance 4 and a state in which the landing doors 9 and 10 open the landing entrance 4.

[0094] The door opening prevention device 23' is provided on the elevator shaft 1 side of the landing door 10'. The door opening prevention device 23' is formed integrally with the landing door 10' by extending a member of the landing door 10'. The door opening prevention device 23' is located on the door tip side of the landing door 10'.

[0095] The door-opening prevention device 23' is provided symmetrically to the door-opening prevention device 23 with respect to the center in the width direction of the landing entrance 4. The claw portion 23a' and the through portion 23b' of the door-opening prevention device 23' correspond to the claw portion 23a and the through portion 23b of the door-opening prevention device 23, respectively.

[0096] The door opening prevention device 24' is provided on the side of the landing door 9' facing the elevator shaft 1. The door opening prevention device 24' is attached to the landing door 9'. The door opening prevention device 24' is located on the door trailing edge side of the landing door 9'.

[0097] The door-opening prevention device 24' is provided symmetrically to the door-opening prevention device 24 with respect to the center in the width direction of the landing entrance 4. The mounting plate 24a', the shielding plates 24b' and 24c', the claw portion 24d', the elongated hole 24e', and the through portion 24f' of the door-opening prevention device 24' correspond to the mounting plate 24a, the shielding plates 24b and 24c, the claw portion 24d, the elongated hole 24e, and the through portion 24f of the door-opening prevention device 24, respectively.

[0098] A gap 12b' is provided between the shielding plate 24b' and the return portion 10d' at the door tip of the landing door 10' in the width direction of the landing entrance 4. The gap 12b' extends in the depth direction of the landing entrance 4.

[0099] A gap 12b' is provided between the shielding plate 24b' and the return portion 10d' at the door tip of the landing door 10' in the width direction of the landing entrance 4. The gap 12b' extends in the depth direction of the landing entrance 4.

[0100] The gaps 12a', 12b', and 12c' are connected to form a labyrinth-shaped gap 12' that bends at multiple points. The labyrinth-shaped gap 12' bends at the connection between gaps 12a' and 12b' and at the connection between gaps 12b' and 12c'.

[0101] The door opening prevention device 25 is provided on the vertical frame 7 on the side of the elevator shaft 1. The door opening prevention device 25 is formed integrally with the vertical frame 7 by extending the members of the vertical frame 7.

[0102] The door opening prevention device 25 is formed of a plate-shaped material and has a plurality of claw portions 25a.

[0103] The claw portion 25a protrudes from the end of the facing portion 7d of the vertical frame 7 on the side opposite the landing entrance / exit 4. The claw portion 25a protrudes toward the landing 2 in the depth direction of the landing entrance / exit 4. The multiple claw portions 25a are lined up and spaced apart from each other in the vertical direction. The door-opening prevention device 25 has through portions 25b provided above the claw portions 25a. The claw portions 25a and the through portions 25b are lined up alternately in the vertical direction. The claw portions 25a and the through portions 25b are provided across the vertical direction from near the upper end to near the lower end of the vertical frame 7.

[0104] The door opening prevention device 26 is provided on the elevator shaft 1 side of the landing door 10. The door opening prevention device 26 is attached to the landing door 10. The door opening prevention device 26 is located on the door trailing edge side of the landing door 10.

[0105] The door-opening prevention device 26 is formed of a plate-shaped material. The door-opening prevention device 26 has an attachment plate 26a, shielding plates 26b and 26c, and a plurality of claws 26d. The attachment plate 26a and the shielding plates 26b and 26c extend vertically from near the upper end to near the lower end of the landing door 10.

[0106] The mounting plate 26a extends in the depth direction of the landing entrance 4 along the outer side surface of the landing door 10 at the side surface portion 10c of the door trailing edge of the landing door 10. The mounting plate 26a is attached to the side surface portion 10c of the door trailing edge of the landing door 10 by screw members 27 and fasteners 28.

[0107] The mounting plate 26a is provided with an elongated hole 26e. The longitudinal direction of the elongated hole 26e is oriented in the vertical direction. The screw member 27 is passed through the elongated hole 26e and screwed into the side surface portion 10c of the door trailing edge portion of the landing door 10. The screw member 27 is passed through a lower part of the elongated hole 26e than the upper end portion. The stopper 28 is sandwiched between the other mounting plate 26a and the head 27a of the screw member 27.

[0108] That is, the door-opening prevention device 26 is attached to the landing door 10 so as to be movable downward, and furthermore, its downward movement is restricted by the stopper 28 .

[0109] The shielding plate 26b extends from the end of the mounting plate 26a on the landing 2 side. The shielding plate 26b extends from the outer side surface of the landing door 10 at the side surface portion 10c of the door end portion of the landing door 10. The shielding plate 26b extends toward the landing 2 in the depth direction of the landing entrance / exit 4. The shielding plate 26b is located on the side of the end return portion 7d of the vertical frame 7 opposite the landing entrance / exit 4 in the width direction of the landing entrance / exit 4. The shielding plate 26b faces the end return portion 7d of the vertical frame 7 in the width direction of the landing entrance / exit 4. A gap 13b is provided between the shielding plate 26b and the end return portion 7d of the vertical frame 7 in the width direction of the landing entrance / exit 4. The gap 13b extends in the depth direction of the landing entrance / exit 4.

[0110] The shielding plate 26c extends from the end of the shielding plate 26b on the landing entrance / exit 4 side. The shielding plate 26c extends toward the landing entrance / exit 4 in the width direction of the landing entrance / exit 4. The shielding plate 26c is located inside the vertical frame 7. The shielding plate 26c is located on the landing 2 side of the end return 7d of the vertical frame 7. The shielding plate 26c faces the end return 7d of the vertical frame 7 in the depth direction of the landing entrance / exit 4. A gap 13c is provided between the shielding plate 26c and the end return 7d of the vertical frame 7 in the depth direction of the landing entrance / exit 4. The gap 13c extends in the width direction of the landing entrance / exit 4.

[0111] Gaps 13a, 13b, and 13c are connected to each other to form a labyrinth-shaped gap 13 that bends at multiple points. Labyrinth-shaped gap 13 bends at the connection between gaps 13a and 13b and at the connection between gaps 13b and 13c.

[0112] The claw portion 26d protrudes from the end of the shielding plate 26c on the side of the landing entrance 4. The claw portion 26d protrudes in the depth direction of the landing entrance 4 on the side opposite the landing 2. The claw portion 26d is positioned closer to the landing entrance 4 in the width direction of the landing entrance 4 than the claw portion 25a. The multiple claw portions 26d are lined up and spaced apart from each other in the vertical direction. The door opening prevention device 26 has through portions 26f provided below the claw portions 26d. The claw portions 26d and the through portions 26f are lined up alternately in the vertical direction. The claw portions 26d and the through portions 26f are provided across the vicinity of the upper end and the lower end of the landing door 10 in the vertical direction.

[0113] The claw portion 26d does not face the claw portion 25a in the width direction of the landing entrance 4. When the landing door 10 opens the landing entrance 4, the claw portion 26d passes through the through portion 25b, and the claw portion 25a passes through the through portion 26f. The landing door 10 is not restricted in movement by the claw portions 25a and 26d from a state in which the landing entrance 4 is closed to a side in which the landing entrance 4 is opened. The positional relationship between the claw portion 25a and the claw portion 26d in the width direction of the landing entrance 4 is reversed between a state in which the landing door 10 closes the landing entrance 4 and a state in which the landing door 10 opens the landing entrance 4.

[0114] The door opening prevention device 25' is provided on the vertical frame 7' on the side of the elevator shaft 1. The door opening prevention device 25' is formed integrally with the vertical frame 7' by extending the members of the vertical frame 7'.

[0115] The door-opening prevention device 25' is provided symmetrically to the door-opening prevention device 25 with respect to the center in the width direction of the landing entrance 4. The claw portion 25a' and the through portion 25b' of the door-opening prevention device 25' correspond to the claw portion 25a and the through portion 25b of the door-opening prevention device 25, respectively.

[0116] The door opening prevention device 26' is provided on the side of the landing door 10' facing the elevator shaft 1. The door opening prevention device 26' is attached to the landing door 10'. The door opening prevention device 26' is located on the door trailing edge side of the landing door 10'.

[0117] The door-opening prevention device 26' is provided symmetrically to the door-opening prevention device 26 with respect to the center in the width direction of the landing entrance 4. The mounting plate 26a', the shielding plates 26b' and 26c', the claw portion 26d', the elongated hole 26e', and the through-hole 26f' of the door-opening prevention device 26' correspond to the mounting plate 26a, the shielding plates 26b and 26c, the claw portion 26d, the elongated hole 26e, and the through-hole 26f of the door-opening prevention device 26, respectively.

[0118] A gap 13b' is provided between the shielding plate 26b' and the facing portion 7d' of the vertical frame 7' in the width direction of the landing entrance 4. The gap 13b' extends in the depth direction of the landing entrance 4.

[0119] A gap 13c' is provided between the shielding plate 26c' and the facing portion 7d' of the vertical frame 7' in the depth direction of the landing entrance 4. The gap 13c' extends in the width direction of the landing entrance 4.

[0120] Gaps 13a', 13b', and 13c' are connected to form labyrinth-shaped gap 13' that bends at multiple points. Labyrinth-shaped gap 13' bends at the connection between gaps 13a' and 13b' and at the connection between gaps 13b' and 13c'.

[0121] The door opening prevention device 20 is provided as described above.

[0122] When a fire breaks out at the landing 2, the door-opening prevention device 20 is activated. The door-opening prevention device 20 operates as follows.

[0123] If a fire breaks out at the landing 2, the stopper 28 is heated by the heat of the fire and melts. The stopper 28 melts at a temperature lower than the melting temperatures of the landing jamb 5, the landing doors 9, 9', 10, and 10', the pair of door opening prevention devices 21 and 22, the pair of door opening prevention devices 23 and 24, the pair of door opening prevention devices 23' and 24', the pair of door opening prevention devices 25 and 26, the pair of door opening prevention devices 25' and 26', and the screw member 27. For example, the stopper 28 is made of resin.

[0124] When the stopper 28 that attaches the door opening prevention device 22 to the landing door 9' melts, a gap is generated between the head 27a of the screw member 27 and the attachment plate 22a of the door opening prevention device 22, and therefore the claw portion 22d of the door opening prevention device 22 moves downward until the screw member 27 reaches the upper end of the elongated hole 22e. The claw portion 21c of the door opening prevention device 21 and the claw portion 22d of the door opening prevention device 22 face each other in the width direction of the landing entrance 4. This prevents the gap between the door leading edge of the landing door 9 and the door leading edge of the landing door 9' at the landing entrance 4 from widening in the width direction of the landing entrance 4 when the landing doors 9 and 9' are closing the landing entrance 4.

[0125] Similarly, when the stopper 28 that attaches the door-opening prevention device 24 to the landing door 9 melts, the gap on the door tip side of the landing door 9 at the landing entrance / exit 4 is prevented from widening in the width direction of the landing entrance / exit 4 from the state in which the landing doors 9 and 10 close the landing entrance / exit 4, and the gap on the door trailing side of the landing door 10 at the landing entrance / exit 4 is prevented from widening in the width direction of the landing entrance / exit 4.

[0126] Similarly, when the stopper 28 that attaches the door-opening prevention device 24' to the landing door 9' melts, the gap on the door tip side of the landing door 9' at the landing entrance 4 is prevented from widening in the width direction of the landing entrance 4 from a state in which the landing doors 9' and 10' close the landing entrance 4, and the gap on the door trailing side of the landing door 10' at the landing entrance 4 is prevented from widening in the width direction of the landing entrance 4.

[0127] Similarly, when the stopper 28 that attaches the door-opening prevention device 26 to the landing door 10 melts, the gap on the door tip side of the landing door 10 at the landing entrance / exit 4 is prevented from widening in the width direction of the landing entrance / exit 4 from a state in which the landing door 10 closes the landing entrance / exit 4.

[0128] Similarly, when the stopper 28 that attaches the door-opening prevention device 26′ to the landing door 10′ melts, the gap on the door tip side of the landing door 10′ at the landing entrance / exit 4 is prevented from widening in the width direction of the landing entrance / exit 4 from a state in which the landing door 10′ closes the landing entrance / exit 4.

[0129] The door opening prevention device 20 operates as follows.

[0130] When the door-opening prevention device 20 is activated while the landing doors 9 and 10 are closing the landing entrance / exit 4, the claw portions 25a and 26d face each other in the width direction of the landing entrance / exit 4, thereby restricting the landing door 10 from moving toward the side that opens the landing entrance / exit 4 relative to the vertical frame 7, and the claw portions 23a and 24d face each other in the width direction of the landing entrance / exit 4, thereby restricting the landing door 9 from moving toward the side that opens the landing entrance / exit 4 relative to the landing door 10.

[0131] Similarly, when the door-opening prevention device 20 is activated while the landing doors 9' and 10' are closing the landing entrance / exit 4, the claw portions 25a' and 26d' face each other in the width direction of the landing entrance / exit 4, thereby restricting the landing door 10' from moving toward the side that opens the landing entrance / exit 4 relative to the vertical frame 7', and the claw portions 23a' and 24d' face each other in the width direction of the landing entrance / exit 4, thereby restricting the landing door 9' from moving toward the side that opens the landing entrance / exit 4 relative to the landing door 10'.

[0132] That is, when the door-opening prevention device 20 is activated while the landing doors 9, 9′, 10, and 10′ are closing the landing entrance / exit 4, the landing doors 9, 9′, 10, and 10 are restricted from moving toward the side that opens the landing entrance / exit 4.

[0133] Furthermore, in a state in which the landing doors 9, 9', 10, and 10' are closing the landing entrance / exit 4, the landing doors 9 and 9' are opposed to each other in the width direction of the landing entrance / exit 4, thereby restricting the landing doors 9 and 9' from moving toward the side that closes the landing entrance / exit 4, and when the door-opening prevention device 20 is activated, the claw portions 23a and 24d are opposed to each other in the width direction of the landing entrance / exit 4, thereby restricting the landing door 10 from moving toward the side that closes the landing entrance / exit 4 relative to the landing door 9, and the claw portions 23a' and 24d' are opposed to each other in the width direction of the landing entrance / exit 4, thereby restricting the landing door 10' from moving toward the side that closes the landing entrance / exit 4 relative to the landing door 9'.

[0134] That is, when the door-opening prevention device 20 is activated while the landing doors 9, 9′, 10, and 10′ are closing the landing entrance / exit 4, the landing doors 9, 9′, 10, and 10 are restricted from moving toward the side that closes the landing entrance / exit 4.

[0135] Furthermore, when the landing doors 9 and 9′ are closing the landing entrance / exit 4, the shielding plate 21b of the door-opening prevention device 21 is located between the return portion 9d′ of the landing door 9′ and the shielding plate 22c of the door-opening prevention device 22 in the depth direction of the landing entrance / exit 4, thereby restricting the door leading edge of the landing door 9 and the door leading edge of the landing door 9′ from moving away from each other in both directions in the depth direction of the landing entrance / exit 4.

[0136] Furthermore, when the landing doors 9 and 10 are closing the landing entrance / exit 4, the return portion 10d of the landing door 10 is located between the front portion 9a of the landing door 9 and the shielding plate 24c of the door opening prevention device 24 in the depth direction of the landing entrance / exit 4, thereby restricting the door tail portion of the landing door 9 and the door tip portion of the landing door 10 from moving away from each other in both directions in the depth direction of the landing entrance / exit 4.

[0137] Similarly, in a state in which the landing doors 9′ and 10′ close the landing entrance / exit 4, the door trailing edge of the landing door 9′ and the door leading edge of the landing door 10′ are restricted from moving away from each other in both depth directions of the landing entrance / exit 4.

[0138] Furthermore, when the landing door 10 is closing the landing entrance / exit 4, the facing portion 7d of the vertical frame 7 is located between the front surface 10a of the landing door 10 and the shielding plate 26c of the door opening prevention device 26 in the depth direction of the landing entrance / exit 4, thereby restricting the door tail portion of the landing door 10 and the vertical frame 7 from moving away from each other in both directions in the depth direction of the landing entrance / exit 4.

[0139] Similarly, in a state in which the landing door 10′ closes the landing entrance 4, the door tail portion of the landing door 10′ and the vertical frame 7′ are restricted from moving away from each other in both depth directions of the landing entrance 4.

[0140] The landing entrance / exit device in the first embodiment includes a landing jamb 5, landing doors 9 and 9', and a door-opening prevention device 20, the landing jamb 5 forms a landing entrance / exit 4 that communicates between an elevator shaft 1 and a landing 2, the landing doors 9 and 9' move in the width direction of the landing entrance / exit 4 to open and close the landing entrance / exit 4, the door-opening prevention device 20 has a pair of door-opening prevention tools 21 and 22 and a stopper 28, the door-opening prevention tool 21 is provided on the landing door 9' on the side of the hoistway 1 and has a claw portion 21c, the door-opening prevention tool 22 is provided on the landing door 9' on the side of the hoistway 1 and has a claw portion 22d, and the claw portion 21c and the claw portion 22d are arranged to separate a state in which the landing doors 9 and 9' close the landing entrance / exit 4 and a state in which the landing doors 9 and 9' close the landing entrance / exit 4, When the platform entrance 4 is open, the positional relationship in the width direction of the platform entrance 4 is reversed, and the claw portion 22 d is provided so as to be movable downward, and furthermore, its downward movement is restricted by the stopper 28, and the stopper 28 melts at a temperature lower than the temperature at which the platform jamb 4, the platform doors 9 and 9′, and the door opening prevention devices 21 and 22 melt, and before the stopper 28 melts, the claw portion 21 c and the claw portion 22 d do not face each other in the width direction of the platform entrance 4, so that the movement of the platform doors 9 and 9′ in the width direction of the platform entrance 4 is not restricted, and when the stopper 28 melts, the claw portion 22 d moves downward and the claw portion 21 c and the claw portion 22 d face each other in the width direction of the platform entrance 4, so that the movement of the platform doors 9 and 9′ in the width direction of the platform entrance 4 is restricted.

[0141] As a result, if a fire breaks out at the landing 2, the landing doors 9 and 9' are restricted from moving from a state in which the landing entrance / exit 4 is closed to a state in which the landing entrance / exit 4 is opened, and the gap between the door leading edge of the landing door 9 and the door leading edge of the landing door 9' at the landing entrance / exit 4 is prevented from widening in the width direction of the landing entrance / exit 4, thereby improving the fire prevention performance that prevents the fire from spreading from the landing 2 into the elevator shaft 1.

[0142] Furthermore, the landing entrance / exit device in the first embodiment includes a landing jamb 5, landing doors 9 and 10, and a door-opening prevention device 20, the landing jamb 5 forms a landing entrance / exit 4 that communicates between an elevator shaft 1 and a landing 2 of the elevator, the landing doors 9 and 10 move in a width direction of the landing entrance / exit 4 to open and close the landing entrance / exit 4, the door-opening prevention device 20 has a pair of door-opening prevention tools 24 and 23 and a stopper 28, the door-opening prevention tool 24 is provided on the landing door 9 side of the hoistway 1 and has a claw portion 24 d, the door-opening prevention tool 23 is provided on the landing door 10 side of the hoistway 1 and has a claw portion 23 a, and the claw portion 23 a and the claw portion 24 d are used to prevent the landing doors 9 and 10 from closing the landing entrance / exit 4 and the landing doors 9 and 10 from closing the landing entrance / exit 4. When the platform entrance / exit 4 is open, the positional relationship in the width direction of the platform entrance / exit 4 is reversed, and the claw portion 24 d is provided so as to be movable downward, and its downward movement is restricted by the stopper 28. The stopper 28 melts at a temperature lower than the temperature at which the platform jamb 4, the platform doors 9 and 10, and the door opening prevention devices 23 and 24 melt. Before the stopper 28 melts, the claw portion 23 a and the claw portion 24 d do not face each other in the width direction of the platform entrance / exit 4, and therefore the movement of the platform doors 9 and 10 in the width direction of the platform entrance / exit 4 is not restricted, and when the stopper 28 melts, the claw portion 24 d moves downward, and the claw portion 23 a and the claw portion 24 d face each other in the width direction of the platform entrance / exit 4, and therefore the movement of the platform doors 9 and 10 in the width direction of the platform entrance / exit 4 is restricted.

[0143] As a result, when a fire breaks out at the landing 2, the landing doors 9 are restricted from moving from a state in which they close the landing entrance / exit 4 to a side in which they open the landing entrance / exit 4, thereby preventing the gap at the door tip side of the landing doors 9 at the landing entrance / exit 4 from widening in the width direction of the landing entrance / exit 4, and the landing doors 10 are restricted from moving to the side in which they close the landing entrance / exit 4, thereby preventing the gap at the door tail side of the landing doors 10 at the landing entrance / exit 4 from widening in the width direction of the landing entrance / exit 4, thereby improving fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0144] Here, the landing door 9, the landing door 10, the door opening prevention device 23, the claw portion 23a, the door opening prevention device 24, and the claw portion 24d in this specification can be replaced with the landing door 9', the landing door 10', the door opening prevention device 23', the claw portion 23a', the door opening prevention device 24', and the claw portion 24d'.

[0145] Furthermore, the landing entrance / exit device in the first embodiment includes a landing jamb 5, a landing door 10, and a door-opening prevention device 20, the landing jamb 5 forms a landing entrance / exit 4 that connects an elevator shaft 1 and a landing 2, the landing door 10 moves in a width direction of the landing entrance / exit 4 to open and close the landing entrance / exit 4, the door-opening prevention device 20 has a pair of door-opening prevention devices 26 and 25, and a stopper 28, the door-opening prevention device 26 is provided on the landing door 10 side facing the hoistway 1, and has a claw portion 26 d, the door-opening prevention device 25 is provided on the landing jamb 5 side facing the hoistway 1, and has a claw portion 25 a, and the claw portion 25 a and the claw portion 26 d are connected to each other to form a state in which the landing door 10 closes the landing entrance / exit 4 and a state in which the landing door 10 closes the landing entrance / exit 4 When the landing entrance / exit 4 is open, the positional relationship in the width direction of the landing entrance / exit 4 is reversed, and the claw portion 26 d is provided so as to be movable downward, and its downward movement is restricted by the stopper 28, and the stopper 28 melts at a temperature lower than the temperature at which the landing jamb 5, the landing door 10, and the door opening prevention devices 25 and 26 melt, and before the stopper 28 melts, the claw portion 25 a and the claw portion 26 d do not face each other in the width direction of the landing entrance / exit 4, so that the movement of the landing door 10 in the width direction of the landing entrance / exit 4 is not restricted, and when the stopper 28 melts, the claw portion 26 d moves downward and the claw portion 25 a and the claw portion 26 d face each other in the width direction of the landing entrance / exit 4, so that the movement of the landing door 10 in the width direction of the landing entrance / exit 4 is restricted.

[0146] As a result, when a fire breaks out at the landing 2, the landing door 10 is restricted from moving from a state in which the landing entrance / exit 4 is closed to a side in which the landing entrance / exit 4 is opened, and the gap on the door tip side of the landing door 10 at the landing entrance / exit 4 is prevented from expanding in the width direction of the landing entrance / exit 4, thereby improving the fire prevention performance that prevents the fire from spreading from the landing 2 into the elevator shaft 1.

[0147] Here, the vertical frame 7, the landing door 10, the door opening prevention device 25, the claw portion 25a, the door opening prevention device 26, and the claw portion 26d in this specification can be replaced with the vertical frame 7', the landing door 10', the door opening prevention device 25', the claw portion 25a', the door opening prevention device 26', and the claw portion 26d'.

[0148] Moreover, in the landing entrance / exit device in the first embodiment, the landing doors 9 and 9' face each other in the width direction of the landing entrance / exit 4, and open and close the landing entrance / exit 4 by moving in opposite directions to each other in the width direction of the landing entrance / exit 4, the door opening prevention device 21 is located on the door tip side of the landing door 9, and has the shielding plate 21b, the door opening prevention device 22 is provided on the landing door 9', and is located on the door tip side of the landing door 9', and has the shielding plates 22b and 22c, and in a state in which the landing door 9 and the landing door 9' close the landing entrance / exit 4, a gap 11a extending in the depth direction of the landing entrance / exit 4 can be generated between the landing door 9 and the landing door 9', the shielding plate 21b extends from the landing door 9 in the width direction of the landing entrance / exit 4, and is located on the side of the landing door 9' opposite to the landing 2 in the depth direction of the landing entrance / exit 4, and a gap 11b extending in the width direction of the landing entrance / exit 4 is opened between the landing door 9' and the landing door 9', The shielding plate 22b extends from the landing door 9' in the depth direction of the landing entrance 4 to the side opposite to the landing 2, and is located on the side of the landing door 9' of the shielding plate 21b in the width direction of the landing entrance 4, and a gap 11c extending in the depth direction of the landing entrance 4 is provided between the shielding plate 22b and the shielding plate 21b. The shielding plate 22c extends from the shielding plate 22b in the width direction of the landing entrance 4 to the side of the landing door 9', and is located on the side of the landing door 9' of the shielding plate 21b in the depth direction of the landing entrance 4. The claw portion 22 d protrudes from the shielding plate 22 c, and the claw portion 21 c protrudes from the shielding plate 21 b and is located on the opposite side from the landing door 9 in the width direction of the landing entrance 4, with a gap 11 d being provided between the shielding plate 21 b and the landing door 9. The gaps 11 a, 11 b, 11 c, and 11 d are connected to form a labyrinth-shaped gap 11 that bends at a plurality of points.

[0149] As a result, when the landing doors 9 and 9′ are closing the landing entrance / exit 4, the gap between the door tip of the landing door 9 and the door tip of the landing door 9′ at the landing entrance / exit 4 becomes a labyrinth-shaped gap 11, thereby improving the fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0150] Furthermore, when the landing doors 9 and 9' are closing the landing entrance / exit 4, the door tip of the landing door 9 and the door tip of the landing door 9' are restricted from moving away from each other in both directions in the depth direction of the landing entrance / exit 4, and this prevents the gap between the door end of the landing door 9 and the door tip of the landing door 9' at the landing entrance / exit 4 from widening in the depth direction of the landing entrance / exit 4, thereby improving fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0151] Furthermore, the door-opening prevention device 20 is activated to restrict the movement of the landing doors 9 and 9′, and the labyrinth gap 11 is maintained, so that the fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1 can be more reliably improved.

[0152] In addition, in the landing entrance / exit device in the first embodiment, the landing doors 9 and 10 open and close the landing entrance / exit 4 by moving in the same direction in the width direction of the landing entrance / exit 4, and the landing door 9 opens and closes the landing entrance / exit 4 by moving at a speed faster than the landing door 10, and the cross section of the door tip portion of the landing door 10 forms a groove shape that opens toward the door tail side of the landing door 10, so that the inside of the door tip portion of the landing door 10 is in the shape of the elevator shaft. The door opening prevention device 24 is located on the door tail side of the landing door 9 and has shielding plates 24b and 24c, the door opening prevention device 23 is provided on the landing door 10 and is located on the door tip side of the landing door 10, and in a state where the landing doors 9 and 10 close the landing entrance / exit 4, the door tail part of the landing door 9 is located on the hoistway 1 side at the door tip part of the landing door 10 in the depth direction of the landing entrance / exit 4, and a landing entrance / exit is not formed between the door tip part of the landing door 10 and the door tail part of the landing door 10. The shielding plate 24b extends from the landing door 9 to the landing 2 side in the depth direction of the landing entrance / exit 4, and is located on the door trailing side of the landing door 10 at the door tip portion of the landing door 10 in the width direction of the landing entrance / exit 4, and a gap 12b extending in the depth direction of the landing entrance / exit 4 is provided between the door tip portion of the landing door 10 and the shielding plate 24c. The claw portion 24 d extends to the side and is located inside the door tip portion of the landing door 10, and a gap 12 c extending in the width direction of the landing entrance / exit 4 is provided between the door tip portion of the landing door 10 and the landing door 10, and the gaps 12 a, 12 b, and 12 c are connected to form a labyrinth-shaped gap 12 that bends at a plurality of points, and the claw portion 24 d protrudes from the shielding plate 24 c, and the claw portion 23 a is located on the door tail side of the landing door 10 at the claw portion 24 d in the width direction of the landing entrance / exit 4.

[0153] As a result, when the landing doors 9 and 10 are closing the landing entrance / exit 4, the gap between the door end portion of the landing door 9 and the door tip portion of the landing door 10 at the landing entrance / exit 4 becomes a labyrinth-shaped gap 12, thereby improving the fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0154] Furthermore, when the landing doors 9 and 10 are closing the landing entrance / exit 4, the door end portion of the landing door 9 and the door tip portion of the landing door 10 are restricted from moving away from each other in both directions in the depth direction of the landing entrance / exit 4, and this prevents the gap between the door end portion of the landing door 9 and the door tip portion of the landing door 10 at the landing entrance / exit 4 from widening in the depth direction of the landing entrance / exit 4, thereby improving fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0155] Furthermore, the door-opening prevention device 20 is activated to restrict the movement of the landing doors 9 and 10, and the labyrinth gap 12 is maintained, so that the fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1 can be more reliably improved.

[0156] Here, the landing door 9, the landing door 10, the labyrinth-shaped gap 12, the gap 12a, the gap 12b, the gap 12c, the door opening prevention device 23, the claw portion 23a, the door opening prevention device 24, the shielding plate 24b, the shielding plate 24c, and the claw portion 24d in this specification can be replaced with the landing door 9', the landing door 10', the labyrinth-shaped gap 12', the gap 12a', the gap 12b', the gap 12c', the door opening prevention device 23', the claw portion 23a', the door opening prevention device 24', the shielding plate 24b', the shielding plate 24c', and the claw portion 24d'.

[0157] Moreover, in the landing entrance / exit device in the first embodiment, the landing three-sided frame 5 has a vertical frame 7 that forms a side portion of the landing entrance / exit 4, and the cross section of the vertical frame 7 forms a groove shape that opens toward the side opposite the landing entrance / exit 4, so that the inside of the vertical frame 7 is connected to the hoistway 1, the landing door 10 does not face the vertical frame 7 in the width direction of the landing entrance / exit 4, and opens and closes the landing entrance / exit 4 by moving in the width direction of the landing entrance / exit 4 between the side of the vertical frame 7 of the landing entrance / exit 4 and the side of the vertical frame 7 opposite the landing entrance / exit 4, the door opening prevention device 26 is located on the door trailing edge side of the landing door 10, and has shielding plates 26 b and 26 c, the door opening prevention device 25 is provided on the vertical frame 7, and in a state where the landing door 10 closes the landing entrance / exit 4, the door trailing edge part of the landing door 10 is located on the hoistway 1 side of the vertical frame 7 in the depth direction of the landing entrance / exit 4, and A gap 13a is provided extending in the width direction of the landing entrance / exit 4, the shielding plate 26b extends from the landing door 10 toward the landing 2 in the depth direction of the landing entrance / exit 4 and is located on the opposite side of the vertical frame 7 from the landing entrance / exit 4 in the width direction of the landing entrance / exit 4, and a gap 13b is provided between the shielding plate 26c and the vertical frame 7, the shielding plate 26c extends from the shielding plate 26b toward the landing entrance / exit 4 in the width direction of the landing entrance / exit 4 and is located inside the vertical frame 7, and a gap 13c is provided between the shielding plate 26c and the vertical frame 7, and the gap 13a, the gap 13b, and the gap 13c are connected to form a labyrinth-shaped gap 13 that bends at a plurality of points, the claw portion 26d protrudes from the shielding plate 26c, and the claw portion 25a is located on the opposite side of the claw portion 26d from the landing entrance / exit 4 in the width direction of the landing entrance / exit 4.

[0158] As a result, when the landing door 10 is closing the landing entrance / exit 4, the gap between the vertical frame 7 at the landing entrance / exit 4 and the door tail of the landing door 10 becomes a labyrinth-shaped gap 13, thereby improving the fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0159] Furthermore, when the landing door 10 is closing the landing entrance / exit 4, the vertical frame 7 and the door end portion of the landing door 10 are restricted from moving away from each other in both directions in the depth direction of the landing entrance / exit 4, and this prevents the gap between the vertical frame 7 at the landing entrance / exit 4 and the door end portion of the landing door 10 from widening in the depth direction of the landing entrance / exit 4, thereby improving fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0160] Furthermore, the operation of the door-opening prevention device 20 restricts the movement of the landing door 10 and maintains the labyrinth gap 13, thereby more reliably improving the fire prevention performance that prevents the spread of fire from the landing 2 into the elevator shaft 1.

[0161] Here, the vertical frame 7, the landing door 10, the labyrinth-shaped gap 13, the gap 13a, the gap 13b, the gap 13c, the door opening prevention device 25, the claw portion 25a, the door opening prevention device 26, the shielding plate 26b, the shielding plate 26c, and the claw portion 26d in this specification can be replaced with the vertical frame 7', the landing door 10', the labyrinth-shaped gap 13', the gap 13a', the gap 13b', the gap 13c', the door opening prevention device 25', the claw portion 25a', the door opening prevention device 26', the shielding plate 26b', the shielding plate 26c', and the claw portion 26d'.

[0162] In the first embodiment, the claw portion 21c may be bent at an acute angle relative to the shielding plate 21b, and the claw portion 22d may be bent at an acute angle relative to the shielding plate 22c. In this case, even if the claw portion 21c and the claw portion 22d are pressed against each other in the width direction of the landing entrance 4 during operation of the door-opening prevention device 20, causing the door-opening prevention devices 21 and 22 to bend, it is possible to prevent the claw portion 21c and the claw portion 22d from coming off each other.

[0163] Here, the door opening prevention device 21, the shielding plate 21b, the claw portion 21c, the door opening prevention device 22, the shielding plate 22c, and the claw portion 22d in this specification can be replaced with the door opening prevention device 23, the return portion 10d, the claw portion 23a, the door opening prevention device 24, the shielding plate 24c, and the claw portion 24d, the door opening prevention device 23', the return portion 23', the claw portion 23a', the door opening prevention device 24', the shielding plate 24c', and the claw portion 24d', the door opening prevention device 25, the cover portion 7d, the claw portion 25a, the door opening prevention device 26, the shielding plate 26c, and the claw portion 26d, and the door opening prevention device 25', the cover portion 7d', the claw portion 25a', the door opening prevention device 26', the shielding plate 26c', and the claw portion 26d', respectively.

[0164] In the first embodiment, the claws 21c and 22d are plate-shaped, but at least one of the claws 21c and 22d may be rod-shaped. In this case, for example, the claw 21c may be formed of a member separate from the plate-shaped member of the door-opening prevention device 21 and joined to the plate-shaped member of the door-opening prevention device 21.

[0165] Here, the door opening prevention device 21, claw portion 21c, door opening prevention device 22, and claw portion 22d in this specification can be replaced with door opening prevention device 23, claw portion 23a, door opening prevention device 24, and claw portion 24d, door opening prevention device 23', claw portion 23a', door opening prevention device 24', and claw portion 24d', door opening prevention device 25, claw portion 25a, door opening prevention device 26, and claw portion 26d, and door opening prevention device 25', claw portion 25a', door opening prevention device 26', and claw portion 26d', respectively.

[0166] Furthermore, in the first embodiment, the claw portion 21c and the through portion 21d are provided across the vicinity of the upper end and the lower end of the landing door 9, and the claw portion 22d and the through portion 22f are provided across the vicinity of the upper end and the lower end of the landing door 9', but the claw portion 21c and the through portion 21d do not have to be provided at the upper part of the landing door 9, and the claw portion 22d and the through portion 22f do not have to be provided at the upper part of the landing door 9'. In this case, from a state in which the landing doors 9 and 9' close the landing entrance / exit 4, the movement of the upper parts of the landing doors 9 and 9' in the width direction of the landing entrance / exit 4 is restricted by the locking device.

[0167] Here, the landing door 9, the landing door 9' claw portion 21c, the penetration portion 21d, the claw portion 22d, and the penetration portion 22f in this specification can be replaced with the landing door 10, the landing door 9, the claw portion 23a, the penetration portion 23b, the claw portion 24d, and the penetration portion 24f, the landing door 10', the landing door 9', the claw portion 23a', the penetration portion 23b', the claw portion 24d', and the penetration portion 24f', the vertical frame 7, the landing door 10, the claw portion 25a, the penetration portion 25b, the claw portion 26d, and the penetration portion 26f, and the vertical frame 7', the landing door 10', the claw portion 25a', the penetration portion 25b', the claw portion 26d', and the penetration portion 26f', respectively.

[0168] Furthermore, in embodiment 1, the multiple claw portions 21c, the multiple through portions 21d, the multiple claw portions 22d, and the multiple through portions 22f may be one claw portion 21c, one through portion 21d, one claw portion 22d, and one through portion 22f.

[0169] Here, the claw portion 21c, the through portion 21d, the claw portion 22d, and the through portion 22f in this specification can be replaced with the claw portion 23a, the through portion 23b, the claw portion 24d, and the through portion 24f, the claw portion 23a', the through portion 23b', the claw portion 24d', and the through portion 24f', the claw portion 25a, the through portion 25b, the claw portion 26d, and the through portion 26f, and the claw portion 25a', the through portion 25b', the claw portion 26d', and the through portion 26f', respectively.

[0170] Furthermore, in the first embodiment, door-opening prevention device 21 is not attached so as to be movable downward, and door-opening prevention device 22 is attached so as to be movable downward, and its downward movement is further restricted by stopper 28, but door-opening prevention device 21 may be attached so as to be movable downward, and its downward movement may be restricted by stopper 28, and door-opening prevention device 22 may not be attached so as to be movable downward. In this case, door-opening prevention device 21 is provided with through-hole 21d below claw portion 21c, and door-opening prevention device 22 is provided with through-hole 22f above claw portion 22d.

[0171] Here, the door opening prevention device 21, claw portion 21c, penetration portion 21d, door opening prevention device 22, claw portion 22d, and penetration portion 22f in this specification can be replaced with door opening prevention device 23, claw portion 23a, penetration portion 23b, door opening prevention device 24, claw portion 24d, and penetration portion 24f, door opening prevention device 23', claw portion 23a', penetration portion 23b', door opening prevention device 24', claw portion 24d', and penetration portion 24f', door opening prevention device 25, claw portion 25a, penetration portion 25b, door opening prevention device 26, claw portion 26d, and penetration portion 26f, and door opening prevention device 25', claw portion 25a', penetration portion 25b', door opening prevention device 26', claw portion 26d', and penetration portion 26f', respectively.

[0172] Next, an elevator hall entrance / exit device according to the second embodiment will be described with reference to FIGS.

[0173] FIG. 4 is a front view of the landing entrance 4 in the second embodiment. FIG. 4 is a drawing of the landing entrance 4 as seen from the landing 2 side. FIG. 5 is a rear view of the landing entrance 4 in the second embodiment. FIG. 5 is a drawing of the landing entrance 4 as seen from the hoistway 1 side. FIG. 6 is a drawing as seen from the arrows E-E in FIG. 5. In FIG. 6, part D' is symmetrical to part D with respect to the center of the landing entrance 4 in the width direction. In FIGS. 4 to 6, the landing doors 31 and 31' close the landing entrance 4. FIG. 10 is a drawing of part B in FIG. 6. FIG. 10 shows the state when the door-opening prevention device 20 is installed. FIG. 12 is a drawing as seen from the arrows H-H in FIG. 10. FIG. 12(a) shows the state when the door-opening prevention device 20 is installed. FIG. 12(b) shows the state when the door-opening prevention device 20 is activated. FIG. 13 is a drawing as seen from the arrows J-J in FIG. 10. Fig. 13(a) shows the state when the door-opening prevention device 20 is installed. Fig. 13(b) shows the state when the door-opening prevention device 20 is in operation. Fig. 16 is a drawing of part D in Fig. 6. Fig. 16 shows the state when the door-opening prevention device 20 is installed. Fig. 17 is a drawing seen from the L-L arrows in Fig. 16. Fig. 17(a) shows the state when the door-opening prevention device 20 is installed. Fig. 17(b) shows the state when the door-opening prevention device 20 is in operation.

[0174] In the second embodiment, landing doors 31 and 31' are provided instead of the landing doors 9, 9', 10, and 10' in the first embodiment. Furthermore, in the second embodiment, the threshold groove portion 6b of the landing threshold 6, the rail 14b of the landing-door opening and closing device 14, the first interlocking mechanism, the third interlocking mechanism, the pair of door-opening prevention devices 23 and 24 of the door-opening prevention device 20, and the pair of door-opening prevention devices 23' and 24' of the door-opening prevention device 20 in the first embodiment are not provided.

[0175] The landing entrance 4 is opened and closed by the landing doors 31 and 31' as described below.

[0176] The landing doors 31 and 31′ are located on the side of the landing jamb 5 facing the hoistway 1 in the depth direction of the landing entrance 4. The landing doors 31 and 31′ are located above the landing threshold 6.

[0177] The landing door 31 is located on the hoistway 1 side of the vertical frame 7 in the depth direction of the landing entrance 4. The landing door 31′ is located on the hoistway 1 side of the vertical frame 7′ in the depth direction of the landing entrance 4.

[0178] The landing door 31 does not face the vertical frame 7 in the width direction of the landing entrance / exit 4. The landing door 31' does not face the vertical frame 7' in the width direction of the landing entrance / exit 4. The landing door 31 and the landing door 31' face each other in the width direction of the landing entrance / exit 4.

[0179] The landing doors 31 and 31' open and close the landing entrance 4 by moving in the width direction of the landing entrance 4. The landing door 31 moves from the center of the landing entrance 4 in the width direction along the side of the vertical frame 7. The landing door 31' moves from the center of the landing entrance 4 in the width direction along the side of the vertical frame 7' in the width direction of the landing entrance 4. The landing doors 31 and 31' move in opposite directions in the width direction of the landing entrance 4. The landing door 31 opens and closes the landing entrance 4 by moving between the inside and outside of the landing entrance 4 at the vertical frame 7 in the width direction of the landing entrance 4. The landing door 31' opens and closes the landing entrance 4 by moving between the inside and outside of the landing entrance 4 at the vertical frame 7' in the width direction of the landing entrance 4.

[0180] When the landing doors 31 and 31′ close the landing entrance 4, the landing doors 31 and 31′ are located inside the landing entrance 4. When the landing doors 31 and 31′ are open, the landing doors 31 and 31′ are located outside the landing entrance 4 and are not located inside the landing entrance 4.

[0181] When the car ascends or descends in the hoistway 1 and arrives at the landing 2, the car entrance and the landing entrance 4 face each other, and the landing doors 31 and 31' open and close the landing entrance 4. When the landing doors 31 and 31' open the landing entrance 4, elevator users move between the inside of the car and the landing 2 through the car entrance and the landing entrance 4. When the car has not yet arrived at the landing 2, the landing doors 31 and 31' close the landing entrance 4.

[0182] The landing entrance 4 is opened and closed by the landing doors 31 and 31' as described above.

[0183] The landing doors 31 and 31' are formed as follows.

[0184] The landing door 31 is formed in the same manner as the landing door 9 of embodiment 1. A front surface 31a, side surfaces 31b and 31c, and return portions 31d and 31e of the landing door 31 correspond to the front surface 9a, side surfaces 9b and 9c, and return portions 9d and 9e of the landing door 9 of embodiment 1, respectively.

[0185] The landing door 31′ is formed symmetrically to the landing door 31 with respect to the center in the width direction of the landing entrance / exit 4. The front surface portion 31a′, side surfaces 31b′ and 31c′, and return portions 31d′ and 31e′ of the landing door 31′ correspond to the front surface portion 31a, side surfaces 31b and 31c, and return portions 31d and 31e of the landing door 31, respectively.

[0186] The landing doors 31 and 31' are formed as described above.

[0187] When the landing doors 31 and 31' close the landing entrance 4, the landing doors 31 and 31' are positioned as follows.

[0188] The landing door 31 is located on the side of the vertical frame 7 at the landing entrance 4 in the width direction of the landing entrance 4. The landing door 31′ is located on the side of the vertical frame 7′ at the landing entrance 4 in the width direction of the landing entrance 4.

[0189] The positional relationship between the door leading edge of the landing door 31 and the door leading edge of the landing door 31′ is the same as the positional relationship between the door leading edge of the landing door 9 and the door leading edge of the landing door 9′ in the first embodiment.

[0190] The positional relationship between the door end portion of the landing door 31 and the vertical frame 7 is the same as the positional relationship between the door end portion of the landing door 10 and the vertical frame 7 in the first embodiment.

[0191] The landing door 31 ′ is positioned symmetrically to the landing door 31 with respect to the center of the landing entrance 4 in the width direction.

[0192] The positional relationship between the trailing edge of the landing door 31' and the vertical frame 7' is the same as the positional relationship between the trailing edge of the landing door 10' and the vertical frame 7' in the first embodiment.

[0193] When the landing doors 31 and 31' close the landing entrance 4, the landing doors 31 and 31' are positioned as described above.

[0194] The landing doors 31 and 31' are guided in their movement in the width direction of the landing entrance / exit 4 as follows.

[0195] The landing doors 31 and 31 ′ are guided in their movement in the width direction of the landing entrance / exit 4 by the landing door opening / closing device 14 and the landing threshold 6 .

[0196] The rail 14a of the landing door opening and closing device 14 is provided for the landing doors 31 and 31'.

[0197] The hangers 14c of the landing-door operating device 14 are attached to the upper parts of the landing doors 31 and 31'. The rollers 14d are rotatably attached to the hangers 14c. The rollers 14d attached to the hangers 14c at the upper parts of the landing doors 31 and 31' are placed on the rails 14a.

[0198] The grooves 6a of the landing threshold 6 are provided for the landing doors 31 and 31'.

[0199] The landing doors 31 and 31' have door legs 15 attached to their lower parts. The door legs 15 attached to the lower parts of the landing doors 31 and 31' are inserted into the grooves 6a.

[0200] The landing doors 31 and 31' are suspended from the rail 14a via hangers 14c and rollers 14d. The landing doors 31 and 31' are fitted into the groove 6a of the landing threshold 6 via the door legs 15. The landing doors 31 and 31' move along the rail 14a and the groove 6a. The landing doors 31 and 31' are guided in their movement in the width direction of the landing entrance / exit 4 by the rail 14a and the groove 6a.

[0201] The landing doors 31 and 31' are connected by a second interlocking mechanism. The landing doors 31 and 31' are interlocked by the second interlocking mechanism. When the landing doors 31 and 31' open and close the landing entrance 4, the landing doors 31 and 31' move at the same speed.

[0202] When the elevator car has not arrived at the landing 2, the landing doors 31 and 31' close the landing entrance 4, and the upper parts of the landing doors 31 and 31' are restricted by the locking device from moving toward the side that opens the landing entrance 4. For example, the upper part of the landing door 31 is directly restricted by the locking device from moving toward the side that opens the landing entrance 4, and the upper part of the landing door 31' is indirectly restricted by the locking device via the second interlocking mechanism from moving toward the side that opens the landing entrance 4.

[0203] When the elevator car arrives at the landing 2, the upper parts of the landing doors 31 and 31' are not restricted by the locking device from moving to the side that opens the landing entrance 4.

[0204] The landing doors 31 and 31' are guided in their movement in the width direction of the landing entrance / exit 4 as described above.

[0205] Next, a description will be given of the door opening prevention device 20. The door opening prevention device 20 is provided as follows.

[0206] The door opening prevention device 20 includes a pair of door opening prevention members 21 and 22, a pair of door opening prevention members 25 and 26, a pair of door opening prevention members 25' and 26', a plurality of screw members 27, and a plurality of stoppers 28.

[0207] The pair of door opening prevention devices 21 and 22 in the second embodiment are provided in the same manner as the pair of door opening prevention devices 21 and 22 in the first embodiment. In the first embodiment, the door opening prevention device 21 is provided at the door tip portion of the landing door 9, and the door opening prevention device 22 is provided at the door tip portion of the landing door 9', but in the second embodiment, the door opening prevention device 21 is provided at the door tip portion of the landing door 31, and the door opening prevention device 22 is provided at the door tip portion of the landing door 31'. The door tip portion of the landing door 31 corresponds to the door tip portion of the landing door 9 in the first embodiment, and the door tip portion of the landing door 31' corresponds to the door tip portion of the landing door 9' in the first embodiment.

[0208] The pair of door opening prevention devices 25 and 26 in the second embodiment are provided in the same manner as the pair of door opening prevention devices 25 and 26 in the first embodiment. In the first embodiment, the door opening prevention device 26 is provided at the door end portion of the landing door 10, but in the second embodiment, the door opening prevention device 26 is provided at the door end portion of the landing door 31. The door end portion of the landing door 31 corresponds to the door end portion of the landing door 10 in the first embodiment.

[0209] The pair of door opening prevention devices 25' and 26' in the second embodiment are provided in the same manner as the pair of door opening prevention devices 25' and 26' in the first embodiment. In the first embodiment, the door opening prevention device 26' is provided at the door end portion of the landing door 10', but in the second embodiment, the door opening prevention device 26' is provided at the door end portion of the landing door 31'. The door end portion of the landing door 31' corresponds to the door end portion of the landing door 10' in the first embodiment.

[0210] The door opening prevention device 20 is provided as described above.

[0211] The door opening prevention device 20 in the second embodiment operates in the same manner as the door opening prevention device 20 in the first embodiment.

[0212] The landing entrance / exit device in the second embodiment has the same effects as the landing entrance / exit device in the first embodiment.

[0213] Next, an elevator hall entrance / exit device according to a third embodiment will be described with reference to FIGS.

[0214] FIG. 7 is a front view of the landing entrance / exit in the third embodiment. FIG. 7 is a drawing of the landing entrance / exit 4 as seen from the landing 2 side. FIG. 8 is a rear view of the landing entrance / exit in the third embodiment. FIG. 8 is a drawing of the landing entrance / exit 4 as seen from the hoistway 1 side. FIG. 9 is a drawing as seen from the arrows F-F in FIG. 8. In FIGS. 7 to 9, the landing doors 9 and 10 close the landing entrance / exit 4. FIG. 11 is a drawing of part G in FIG. 9. FIG. 11 shows the state when the door-opening prevention device 20 is installed. FIG. 12 is a drawing as seen from the arrows H-H in FIG. 11. FIG. 12(a) shows the state when the door-opening prevention device 20 is installed. FIG. 12(b) shows the state when the door-opening prevention device 20 is activated. FIG. 13 is a drawing as seen from the arrows J-J in FIG. 11. FIG. 13(a) shows the state when the door-opening prevention device 20 is installed. FIG. 13(b) shows the state of the door-opening prevention device 20 when it is in operation. FIG. 14 is a drawing of part C in FIG. 9. FIG. 14 shows the state of the door-opening prevention device 20 when it is installed. FIG. 15 is a drawing seen from the arrows K-K in FIG. 14. FIG. 15(a) shows the state of the door-opening prevention device 20 when it is installed. FIG. 15(b) shows the state of the door-opening prevention device 20 when it is in operation. FIG. 16 is a drawing of part D in FIG. 9. FIG. 16 shows the state of the door-opening prevention device 20 when it is installed. FIG. 17 is a drawing seen from the arrows L-L in FIG. 16. FIG. 17(a) shows the state of the door-opening prevention device 20 when it is installed. FIG. 17(b) shows the state of the door-opening prevention device 20 when it is in operation.

[0215] In the third embodiment, a vertical frame 41 and landing doors 42 and 43 are provided instead of the vertical frame 7' and the landing doors 9, 9', 10, and 10' in the first embodiment. Furthermore, in the third embodiment, the second interlocking mechanism and the third interlocking mechanism of the landing-door opening and closing device 14, the pair of door-opening prevention devices 23' and 24' of the door-opening prevention device 20, and the pair of door-opening prevention devices 25' and 26' of the door-opening prevention device 20 in the first embodiment are not provided.

[0216] The landing jamb 5 has vertical frames 7 and 41, and an upper frame 8. The vertical frame 7 forms one side in the width direction of the landing entrance / exit 4. The vertical frame 41 forms the other side in the width direction of the landing entrance / exit 4. The upper frame 8 forms the upper part of the landing entrance / exit 4. The upper frame 8 is connected to the upper part of the vertical frame 7 and the upper part of the vertical frame 41.

[0217] The vertical frame 41 is formed as follows.

[0218] The vertical frame 41 is formed of a plate-shaped member. The vertical frame 41 has recessed portions 41a, 41b, and 41c, a visible portion 41d, a scattering portion 41e, an inside return portion 41f, and a scattering portion 41g. The recessed portions 41a, 41b, and 41c, the visible portion 41d, the scattering portion 41e, the inside return portion 41f, and the scattering portion 41g extend in the vertical direction.

[0219] The projection portion 41a extends in the depth direction of the landing entrance / exit 4 and forms the width of the landing entrance / exit 4. The projection portion 41b extends from the end of the projection portion 41a on the hoistway 1 side in the width direction of the landing entrance / exit 4 toward the side opposite the landing entrance / exit 4. The projection portion 41c extends from the end of the projection portion 41b on the side opposite the landing entrance / exit 4 toward the hoistway 1 in the depth direction of the landing entrance / exit 4. The visible portion 41d extends from the end of the projection portion 41a on the landing 2 side in the width direction of the landing entrance / exit 4 toward the side opposite the landing entrance / exit 4. The spillover portion 41e extends from the end of the projection portion 41d on the side opposite the landing entrance / exit 4 toward the hoistway 1 in the depth direction of the landing entrance / exit 4. The facing portion 41f extends from the end of the projection portion 41c on the hoistway 1 side in the width direction of the landing entrance / exit 4 toward the side opposite the landing entrance / exit 4. The spreading portion 41 g extends from the end of the end return portion 41 f on the side opposite to the landing entrance 4 toward the landing 2 in the depth direction of the landing entrance 4 .

[0220] The vertical frame 41 is formed as described above.

[0221] The landing entrance 4 is opened and closed by the landing doors 42 and 43 as described below.

[0222] The landing doors 42 and 43 are located on the side of the landing jamb 5 facing the hoistway 1 in the depth direction of the landing entrance 4. The landing doors 42 and 43 are located above the landing threshold 6.

[0223] The landing door 43 is located on the hoistway 1 side of the vertical frame 7 in the depth direction of the landing entrance 4. The landing door 42 is located on the hoistway 1 side of the landing door 43 in the depth direction of the landing entrance 4. The landing door 42 is located on the hoistway 1 side of the vertical frame 41 in the depth direction of the landing entrance 4.

[0224] The landing doors 42 and 43 do not face the vertical frame 7 in the width direction of the landing entrance / exit 4. The landing doors 42 and 43 face the vertical frame 41 in the width direction of the landing entrance / exit 4. The landing doors 42 and 43 do not face each other in the width direction of the landing entrance / exit 4.

[0225] The landing doors 42 and 43 open and close the landing entrance 4 by moving in the width direction of the landing entrance 4. The landing doors 42 and 43 move from the vertical frame 41 to the vertical frame 7 side in the width direction of the landing entrance 4. The landing doors 42 and 43 move in the same direction in the width direction of the landing entrance 4. The landing doors 42 and 43 open and close the landing entrance 4 by moving between the inside and outside of the landing entrance 4 at the vertical frame 7 in the width direction of the landing entrance 4.

[0226] When the landing doors 42 and 43 close the landing entrance 4, the landing doors 42 and 43 are located inside the landing entrance 4. When the landing doors 42 and 43 open the landing entrance 4, the landing doors 42 and 43 are located outside the landing entrance 4 and are not located inside the landing entrance 4.

[0227] When the car ascends or descends in the hoistway 1 and arrives at the landing 2, the car entrance and the landing entrance 4 face each other, and the landing doors 42 and 43 open and close the landing entrance 4. When the landing doors 42 and 43 open the landing entrance 4, elevator users move between the inside of the car and the landing 2 through the car entrance and the landing entrance 4. When the car has not yet arrived at the landing 2, the landing doors 42 and 43 close the landing entrance 4.

[0228] The landing entrance 4 is opened and closed by the landing doors 42 and 43 as described above.

[0229] The landing doors 42 and 43 are formed as follows.

[0230] The landing door 42 is formed in the same manner as the landing door 9 of embodiment 1. A front surface 42a, side surfaces 42b and 42c, and return portions 42d and 42e of the landing door 42 correspond to the front surface 9a, side surfaces 9b and 9c, and return portions 9d and 9e of the landing door 9 of embodiment 1, respectively.

[0231] The landing door 43 is formed in the same manner as the landing door 10 of embodiment 1. A front surface 43a, side surfaces 43b and 43c, and return portions 43d and 43e of the landing door 43 correspond to the front surface 10a, side surfaces 10b and 10c, and return portions 10d and 10e of the landing door 10 of embodiment 1, respectively.

[0232] The landing doors 42 and 43 are formed as described above.

[0233] When the landing doors 42 and 43 close the landing entrance 4, the landing doors 42 and 43 are positioned as follows.

[0234] The landing door 42 is located on the side of the vertical frame 7 at the landing entrance 4 in the width direction of the landing entrance 4. The landing door 43 is located on the side of the vertical frame 41 at the landing entrance 4 in the width direction of the landing entrance 4.

[0235] The vertical frame 41 and the door tip of the landing door 42 are spaced apart.

[0236] The door tip portion of the landing door 42 is located on the hoistway 1 side of the vertical frame 41 in the depth direction of the landing entrance / exit 4. The front surface portion 42a of the door tip portion of the landing door 42 faces the projection portion 41b of the vertical frame 41 in the depth direction of the landing entrance / exit 4. A gap is provided between the front surface portion 42a of the door tip portion of the landing door 42 and the projection portion 41b of the vertical frame 41 in the depth direction of the landing entrance / exit 4. This gap extends in the width direction of the landing entrance / exit 4.

[0237] Furthermore, the door tip portion of the landing door 42 is located on the side of the vertical frame 41 that faces the landing entrance / exit 4 in the width direction of the landing entrance / exit 4. A side surface portion 42b of the door tip portion of the landing door 42 faces the projection portion 41c of the vertical frame 41 in the width direction of the landing entrance / exit 4. A gap 11a is provided between the side surface portion 42b of the door tip portion of the landing door 42 and the projection portion 41c of the vertical frame 41 in the width direction of the landing entrance / exit 4. The gap 11a extends in the depth direction of the landing entrance / exit 4.

[0238] The positional relationship between the door tail portion of the landing door 42 and the door tip portion of the landing door 43 is the same as the positional relationship between the door tail portion of the landing door 9 and the door tip portion of the landing door 10 in the first embodiment.

[0239] The positional relationship between the door end portion of the landing door 43 and the vertical frame 7 is the same as the positional relationship between the door end portion of the landing door 10 and the vertical frame 7 in the first embodiment.

[0240] When the landing doors 42 and 43 close the landing entrance 4, the landing doors 42 and 43 are positioned as described above.

[0241] The landing doors 42 and 43 are guided in their movement in the width direction of the landing entrance / exit 4 as follows.

[0242] The landing doors 42 and 43 are guided in their movement in the width direction of the landing entrance / exit 4 by the landing door opening / closing device 14 and the landing threshold 6.

[0243] The rail 14a of the landing door opening and closing device 14 is provided for the landing door 42. The rail 14b of the landing door opening and closing device 14 is provided for the landing door 43.

[0244] The hanger 14c of the landing-door operating device 14 is attached to the upper part of the landing doors 42 and 43. The roller 14d is rotatably attached to the hanger 14c. The roller 14d attached to the hanger 14c at the upper part of the landing door 42 is placed on the rail 14a. The roller 14d attached to the hanger 14c at the upper part of the landing door 43 is placed on the rail 14b.

[0245] The groove portion 6a of the landing threshold 6 is provided for the landing door 42. The groove portion 6b of the landing threshold 6 is provided for the landing door 43.

[0246] The landing doors 42 and 43 have door legs 15 attached to their lower ends. The door leg 15 attached to the lower part of the landing door 42 is inserted into the groove 6a. The door leg 15 attached to the lower part of the landing door 43 is inserted into the groove 6b.

[0247] The landing door 42 is suspended from the rail 14a via a hanger 14c and a roller 14d. The landing door 42 is fitted into the groove 6a of the landing threshold 6 via the door legs 15. The landing door 42 moves along the rail 14a and the groove 6a. The landing door 42 is guided in its movement in the width direction of the landing entrance / exit 4 by the rail 14a and the groove 6a.

[0248] The landing door 43 is suspended from the rail 14b via a hanger 14c and a roller 14d. The landing door 43 is fitted into the groove 6b of the landing threshold 6 via the door legs 15. The landing door 43 moves along the rail 14b and the groove 6b. The landing door 43 is guided in its movement in the width direction of the landing entrance / exit 4 by the rail 14b and the groove 6b.

[0249] The landing doors 42 and 43 are connected by a first interlocking mechanism. The landing doors 42 and 43 are interlocked by the first interlocking mechanism. When the landing doors 42 and 43 open and close the landing entrance 4, the landing door 42 moves at a speed faster than the speed of the landing door 43. When the landing doors 42 and 43 open and close the landing entrance 4, for example, the landing door 42 moves at a speed twice as fast as the speed of the landing door 43.

[0250] When the elevator car has not arrived at the landing 2, the landing doors 42 and 43 close the landing entrance 4, and the upper parts of the landing doors 42 and 43 are restricted by the locking device from moving toward the side that opens the landing entrance 4. For example, the upper part of the landing door 42 is directly restricted by the locking device from moving toward the side that opens the landing entrance 4, and the upper part of the landing door 43 is indirectly restricted by the locking device via the first interlocking mechanism from moving toward the side that opens the landing entrance 4.

[0251] When the elevator car arrives at the landing 2, the upper parts of the landing doors 42 and 43 are not restricted by the locking device from moving to the side that opens the landing entrance / exit 4.

[0252] The landing doors 42 and 43 are guided in their movement in the width direction of the landing entrance / exit 4 as described above.

[0253] Next, a description will be given of the door opening prevention device 20. The door opening prevention device 20 is provided as follows.

[0254] The door opening prevention device 20 includes a pair of door opening prevention members 21 and 22, a pair of door opening prevention members 23 and 24, a pair of door opening prevention members 25 and 26, a plurality of screw members 27, and a plurality of stoppers 28.

[0255] The pair of door opening prevention devices 21 and 22 in the third embodiment are provided in the same manner as the pair of door opening prevention devices 21 and 22 in the first embodiment. In the first embodiment, the door opening prevention device 21 is provided on the landing door 9, and the door opening prevention device 22 is provided on the landing door 9', but in the third embodiment, the door opening prevention device 21 is provided on the landing door 42, and the door opening prevention device 22 is provided on the vertical frame 41. The vertical frame 41 corresponds to the door tip portion of the landing door 9' in the first embodiment, and the door tip portion of the landing door 42 corresponds to the door tip portion of the landing door 9 in the first embodiment.

[0256] The pair of door opening prevention devices 23 and 24 in the third embodiment are provided in the same manner as the pair of door opening prevention devices 23 and 24 in the first embodiment, and the door opening prevention device 24 is provided on the landing door 9, but in the first embodiment, the door opening prevention device 23 is provided on the landing door 10, but in the third embodiment, the door opening prevention device 23 is provided on the landing door 43, and the door opening prevention device 24 is provided on the landing door 42. The door trailing edge portion of the landing door 42 corresponds to the door trailing edge portion of the landing door 9 in the first embodiment, and the door leading edge portion of the landing door 43 corresponds to the door leading edge portion of the landing door 10 in the first embodiment.

[0257] The pair of door opening prevention devices 25 and 26 in the third embodiment are provided in the same manner as the pair of door opening prevention devices 25 and 26 in the first embodiment. In the first embodiment, the door opening prevention device 26 is provided on the landing door 10, but in the third embodiment, the door opening prevention device 26 is provided on the landing door 43. The door end portion of the landing door 43 corresponds to the door end portion of the landing door 10 in the first embodiment.

[0258] The door opening prevention device 20 is provided as described above.

[0259] The door opening prevention device 20 in the third embodiment operates in the same manner as the door opening prevention device 20 in the first embodiment.

[0260] The landing entrance / exit device in the third embodiment has the same effects as the landing entrance / exit device in the first embodiment.

[0261] Next, an elevator hall entrance / exit device according to the fourth embodiment will be described with reference to FIGS. 18 and 19.

[0262] Fig. 18 is a diagram of the main parts of the fourth embodiment. Fig. 18 shows the state when the door-opening prevention device 20 is installed. Fig. 18 is a diagram corresponding to Fig. 10. Fig. 19 is a diagram viewed from the arrow M-M in Fig. 18. Fig. 19(a) shows the state when the door-opening prevention device 20 is installed. Fig. 19(b) shows the state when the door-opening prevention device 20 is activated. Fig. 19 is a diagram corresponding to Fig. 13.

[0263] In the fourth embodiment, a pair of door opening prevention devices 51 and 52 are provided instead of the pair of door opening prevention devices 21 and 22 in the first embodiment.

[0264] The pair of door opening prevention devices 51 and 52 are provided as follows.

[0265] The door opening prevention device 51 is provided on the elevator shaft 1 side of the landing door 9. The door opening prevention device 51 is attached to the landing door 9. The door opening prevention device 51 is located on the door tip side of the landing door 9.

[0266] The door opening prevention device 51 is formed of a plate-shaped material. The door opening prevention device 51 has an attachment plate 51 a, a shielding plate 51 b, and a plurality of claws 51 c. The attachment plate 51 a and the shielding plate 51 b extend in the vertical direction from near the upper end to near the lower end of the landing door 9.

[0267] The mounting plate 51a extends in the width direction of the landing doorway 4 along the outer side surface of the landing door 9 at a return portion 9d at the door tip portion of the landing door 9. The mounting plate 51a does not extend to the landing door 9' in the width direction of the landing doorway 4. The mounting plate 51a is attached to the return portion 9d at the door tip portion of the landing door 9 with screw members 27.

[0268] The shielding plate 51b extends from the end of the mounting plate 51a on the landing door 9' side. The shielding plate 51b extends from the outer side surface of the landing door 9 at the return portion 9d of the door tip portion of the landing door 9. The shielding plate 51b extends in the depth direction of the landing entrance 4 on the side opposite to the landing 2.

[0269] The claw portion 51c protrudes from the end of the shielding plate 51b on the side opposite the landing 2. The claw portion 51c protrudes in the depth direction of the landing entrance 4 on the side opposite the landing 2. The multiple claw portions 51c are lined up and spaced apart from each other in the vertical direction. The door-opening prevention device 51 is provided with through-portions 51d above the claw portions 51c. The claw portions 51c and the through-portions 51d are lined up alternately in the vertical direction. The claw portions 51c and the through-portions 51d are provided across the vicinity of the upper end and the lower end of the landing door 9 in the vertical direction.

[0270] The door opening prevention device 52 is provided on the side of the landing door 9' facing the elevator shaft 1. The door opening prevention device 52 is attached to the landing door 9'. The door opening prevention device 52 is located on the door tip side of the landing door 9'.

[0271] The door-opening prevention device 52 is formed of a plate-shaped material. The door-opening prevention device 52 has an attachment plate 52a, shielding plates 52b, 52c, and 52d, and a plurality of claws 52e. The attachment plate 52a and the shielding plates 52b, 52c, and 52d extend vertically from near the upper end to near the lower end of the landing door 9′.

[0272] The mounting plate 52a extends in the width direction of the landing entrance 4 along the outer side surface of the landing door 9 at the return portion 9d' at the door tip portion of the landing door 9'. The mounting plate 52a does not extend in the width direction of the landing entrance 4 to the landing door 9. The mounting plate 52a is attached to the return portion 9d' at the door tip portion of the landing door 9' with screw members 27 and fasteners 28.

[0273] The mounting plate 52a is provided with a plurality of elongated holes 52f. The longitudinal direction of the elongated holes 52f is oriented in the vertical direction. The screw members 27 are passed through the elongated holes 52f and screwed into the return portions 9d' at the door tip of the landing door 9'. The screw members 27 are passed through the elongated holes 52f at a position lower than the upper end thereof. The stoppers 28 are sandwiched between the mounting plate 52a and the heads 27a of the screw members 27.

[0274] That is, the door-opening prevention device 52 is attached to the landing door 9' so as to be movable downward, and furthermore, its downward movement is restricted by the stopper 28.

[0275] The shielding plate 52b extends from the end of the mounting plate 52a on the side of the landing door 9. The shielding plate 52b extends from the outer side surface of the landing door 9' at the return portion 9d' of the door tip portion of the landing door 9'. The shielding plate 52b extends toward the landing door 9 in the width direction of the landing entrance 4. The shielding plate 52b is located on the side opposite the landing 2 at the return portion 9d of the door tip portion of the landing door 9. The shielding plate 52b faces the return portion 9d of the door tip portion of the landing door 9 in the depth direction of the landing entrance 4. A gap 11b is provided between the shielding plate 52b and the return portion 9d of the door tip portion of the landing door 9 in the depth direction of the landing entrance 4. The gap 11b extends in the width direction of the landing entrance 4.

[0276] The shielding plate 52c extends from the end of the shielding plate 52b on the side of the landing door 9. The shielding plate 52c extends in the depth direction of the landing entrance 4 on the side opposite the landing 2. The shielding plate 52c is located on the side of the shielding plate 51b on the landing door 9' side in the width direction of the landing entrance 4. The shielding plate 52c faces the shielding plate 51b in the width direction of the landing entrance 4. A gap 11c is provided between the shielding plate 52c and the shielding plate 51b in the width direction of the landing entrance 4. The gap 11c extends in the depth direction of the landing entrance 4.

[0277] The shielding plate 52d extends from the end of the shielding plate 52c on the side opposite the landing 2. The shielding plate 52d extends in the width direction of the landing entrance 4 on the side opposite the landing door 9'. The shielding plate 52d is located on the side of the shielding plate 51b opposite the landing 2. The shielding plate 52d faces the shielding plate 51b in the depth direction of the landing entrance 4. A gap 11d is provided between the shielding plate 52d and the shielding plate 51b in the depth direction of the landing entrance 4. The gap 11d extends in the width direction of the landing entrance 4.

[0278] The gaps 11a, 11b, 11c, and 11d are connected to each other to form a labyrinth-shaped gap 11 that bends at multiple points. The labyrinth-shaped gap 11 bends at the connection portion between the gaps 11a and 11b and at the connection portion between the gaps 11b and 11c.

[0279] The claw portion 52e protrudes from the end of the shielding plate 52d on the side opposite the landing door 9'. The claw portion 52e protrudes toward the landing 2 in the depth direction of the landing entrance 4. The claw portion 52e is located on the side opposite the landing door 9' in the width direction of the landing entrance 4 relative to the claw portion 51c. The multiple claw portions 52e are lined up and spaced apart from each other in the vertical direction. The door-opening prevention device 52 has through portions 52g provided below the claw portions 52e. The claw portions 52e and the through portions 52g are lined up alternately in the vertical direction. The claw portions 52e and the through portions 52g are provided across the vicinity of the upper end and the lower end of the landing door 9' in the vertical direction.

[0280] The claw portion 52e does not face the claw portion 51c in the width direction of the landing entrance 4. When the landing doors 9 and 9' open the landing entrance 4, the claw portion 52e passes through the through portion 51d, and the claw portion 51c passes through the through portion 52g. The landing doors 9 and 9' are not restricted in their movement by the claw portions 51c and 52e from a state in which the landing entrance 4 is closed to a side in which the landing entrance 4 is opened. The positional relationship between the claw portion 51c and the claw portion 52e in the width direction of the landing entrance 4 is reversed between a state in which the landing doors 9 and 9' close the landing entrance 4 and a state in which the landing doors 9 and 9' open the landing entrance 4.

[0281] The pair of door opening prevention devices 51 and 52 are provided as described above.

[0282] The door opening prevention device 20 in the fourth embodiment operates in the same manner as the door opening prevention device 20 in the first embodiment.

[0283] The landing entrance / exit device in the fourth embodiment has the same effects as the landing entrance / exit device in the first embodiment, except for the following points.

[0284] In a state in which the landing doors 9 and 9′ close the landing entrance / exit 4, the door leading portion of the landing door 9 and the door leading portion of the landing door 9′ are not restricted from moving away from each other to one side in the depth direction of the landing entrance / exit 4.

[0285] In addition, the pair of door-opening prevention devices 51 and 52 in embodiment 4 are provided in place of the pair of door-opening prevention devices 25 and 26 in embodiment 1, but it is clear that they can also be provided in place of the pair of door-opening prevention devices 21 and 22 in embodiments 2 and 3.

[0286] Next, an elevator hall entrance / exit device according to the fifth embodiment will be described with reference to FIGS. 20 to 21.

[0287] Fig. 20 is a diagram of the main parts in embodiment 5. Fig. 20 shows the state when the door-opening prevention device 20 is installed. Fig. 20 is a diagram corresponding to Fig. 16. Fig. 21 is a diagram viewed from the N-N arrows in Fig. 20. Fig. 21(a) shows the state when the door-opening prevention device 20 is installed. Fig. 21(b) shows the state when the door-opening prevention device 20 is activated. Fig. 21 is a diagram corresponding to Fig. 17.

[0288] In the fifth embodiment, a pair of door opening prevention devices 61 and 62 are provided instead of the pair of door opening prevention devices 25 and 26 in the first embodiment.

[0289] The pair of door opening prevention devices 61 and 62 are provided as follows.

[0290] The door opening prevention device 61 is provided on the vertical frame 7 on the side of the elevator shaft 1. The door opening prevention device 61 is attached to the vertical frame 7.

[0291] The door opening prevention device 61 is made of a plate-shaped material and has an attachment plate 61a, shielding plates 61b and 61c, and multiple claws 61d. The attachment plate 61a and the shielding plates 61b and 61c extend vertically from near the upper end to near the lower end of the vertical frame 7.

[0292] The mounting plate 61a extends in the width direction of the landing entrance 4 along the inner side surface of the vertical frame 7 at the end return portion 7d of the vertical frame 7. The mounting plate 61a is attached to the end return portion 7d of the vertical frame 7 with screw members 63.

[0293] The shielding plate 61b extends from the end of the mounting plate 61a on the side opposite to the landing entrance 4. The shielding plate 61b extends from the inner side surface of the vertical frame 7 at the end return portion 7d of the vertical frame 7. The shielding plate 61b extends in the depth direction of the landing entrance 4 towards the landing 2 side.

[0294] The shielding plate 61c extends from the end of the shielding plate 61b on the side of the landing 2. The shielding plate 61c extends in the width direction of the landing entrance 4 on the side opposite to the landing entrance 4.

[0295] The claw portion 61d protrudes from the end of the shielding plate 61c on the side opposite the landing entrance 4. The claw portion 61d protrudes in the depth direction of the landing entrance 4 on the side opposite the landing 2. The multiple claw portions 61d are lined up and spaced apart from each other in the vertical direction. The door-opening prevention device 61 has through-portions 61e provided above the claw portions 61d. The claw portions 61d and the through-portions 61e are lined up alternately in the vertical direction. The claw portions 61d and the through-portions 61e are provided across the vertical direction from near the upper end to near the lower end of the vertical frame 7.

[0296] The door opening prevention device 62 is provided on the elevator shaft 1 side of the landing door 10. The door opening prevention device 62 is attached to the landing door 10. The door opening prevention device 62 is located on the door trailing edge side of the landing door 10.

[0297] The door opening prevention device 62 is formed of a plate-shaped material. The door opening prevention device 62 has an attachment plate 62a, shielding plates 62b and 62c, and a plurality of claws 62d. The attachment plate 62a and the shielding plates 62b and 62c extend in the vertical direction from near the upper end to near the lower end of the landing door 10.

[0298] The mounting plate 62a, the shielding plate 62b, and the shielding plate 62c are provided in the same manner as the mounting plate 26a, the shielding plate 26b, and the shielding plate 26c in embodiment 1. The elongated hole 62e corresponds to the elongated hole 26e in embodiment 1.

[0299] The claw portion 62d protrudes from the end of the shielding plate 62c on the side of the landing entrance 4. The claw portion 62d protrudes toward the landing 2 in the depth direction of the landing entrance 4. The claw portion 62d is positioned closer to the landing entrance 4 in the width direction of the landing entrance 4 than the claw portion 61d. The multiple claw portions 62d are lined up and spaced apart from each other in the vertical direction. The door opening prevention device 62 has penetration portions 62f provided below the claw portions 62d. The claw portions 62d and the penetration portions 62f are lined up alternately in the vertical direction. The claw portions 62d and the penetration portions 62f are provided across the vicinity of the upper end and the lower end of the landing door 10 in the vertical direction.

[0300] The claw portion 62d does not face the claw portion 61d in the width direction of the landing entrance / exit 4. When the landing door 10 opens the landing entrance / exit 4, the claw portion 62d passes through the through portion 61e, and the claw portion 61d passes through the through portion 62f. The landing door 10 is not restricted in movement by the claw portion 61d and the claw portion 62d from a state in which the landing entrance / exit 4 is closed to a side in which the landing entrance / exit 4 is opened. The positional relationship between the claw portion 61d and the claw portion 62d in the width direction of the landing entrance / exit 4 is reversed between a state in which the landing door 10 closes the landing entrance / exit 4 and a state in which the landing door 10 opens the landing entrance / exit 4.

[0301] The pair of door opening prevention devices 61 and 62 are provided as described above.

[0302] The door opening prevention device 20 in the fifth embodiment operates in the same manner as the door opening prevention device 20 in the first embodiment.

[0303] The landing entrance / exit device in the fifth embodiment has the same effects as the landing entrance / exit device in the first embodiment.

[0304] Furthermore, in the landing entrance / exit device in the fifth embodiment, the vertical frame 7 and the door-opening prevention device 61 are formed of different materials, and therefore, for example, it is possible to determine the material of the vertical frame 7 by giving priority to design, and to determine the material of the door-opening prevention device 61 by giving priority to strength, workability, price, etc.

[0305] In the landing entrance / exit device in the fifth embodiment, the door-opening prevention device 61 is attached to the vertical frame 7 by the screw member 63, but it may also be attached to the vertical frame 7 by another joining means such as caulking or welding.

[0306] In addition, the pair of door opening prevention devices 61 and 62 in embodiment 5 are provided in place of the pair of door opening prevention devices 25 and 26 in embodiment 1, but it is clear that they can be provided in place of the pair of door opening prevention devices 25 and 26 in embodiments 2 and 3, the pair of door opening prevention devices 25' and 26' in embodiments 1 and 2, the pair of door opening prevention devices 23 and 24 in embodiments 1 and 3, and the pair of door opening prevention devices 23' and 24' in embodiment 1.

[0307] Next, an elevator hall entrance / exit device according to the sixth embodiment will be described with reference to FIGS. 22 to 24.

[0308] FIG. 22 is a diagram of the main parts of embodiment 6. FIG. 22 shows the state when the door-opening prevention device 20 is installed. FIG. 22 is a diagram equivalent to FIG. 16. FIG. 23 is a diagram viewed from the arrows P-P in FIG. 22. FIG. 23(a) shows the state when the door-opening prevention device 20 is installed. FIG. 23(b) shows the state when the door-opening prevention device 20 is activated. FIG. 23 is a diagram equivalent to FIG. 17. FIG. 24 is a diagram viewed from the arrows Q-Q in FIG. 22. FIG. 24(a) shows the state when the door-opening prevention device 20 is installed. FIG. 24(b) shows the state when the door-opening prevention device 20 is activated.

[0309] In the sixth embodiment, a stopper 71 is provided in place of the stopper 28 that attaches the door opening prevention device 26 to the landing door 10 in the first embodiment.

[0310] The pair of door opening prevention devices 25 and 26 of the sixth embodiment are provided as follows.

[0311] The door opening prevention device 25 of the sixth embodiment is provided in the same manner as the door opening prevention device 25 of the first embodiment.

[0312] The door opening prevention device 26 of the sixth embodiment is provided in the same manner as the door opening prevention device 26 of the first embodiment, except for the following points.

[0313] The mounting plate 26 a is attached to the side surface portion 10 c of the door tail portion of the landing door 10 by a screw member 27 and a fastener 71 .

[0314] A gap is provided between the head 27a of the screw member 27 and the mounting plate 26a.

[0315] The stopper 71 is passed through the elongated hole 26e of the mounting plate 26a and attached to the side surface portion 10c of the door trailing edge portion of the landing door 10. The stopper 71 is passed through the upper end portion of the elongated hole 26e. The mounting plate 26a is sandwiched between the side surface portion 10c of the door trailing edge portion of the landing door 10 and the head 71a of the stopper 71.

[0316] That is, the door-opening prevention device 26 is attached to the landing door 10 so as to be movable downward, and furthermore, the downward movement is restricted by the stopper 71.

[0317] The pair of door opening prevention devices 25 and 26 are provided as described above.

[0318] If a fire breaks out at the landing 2, the stopper 71 is heated by the heat of the fire and melts. The stopper 71 melts at a temperature lower than the melting temperatures of the landing jamb 5, the landing doors 9, 9', 10, and 10', the pair of door opening prevention devices 21 and 22, the pair of door opening prevention devices 23 and 24, the pair of door opening prevention devices 23' and 24', the pair of door opening prevention devices 25 and 26, the pair of door opening prevention devices 25' and 26', and the screw member 27. For example, the stopper 71 is made of resin.

[0319] The door opening prevention device 20 in the sixth embodiment operates in the same manner as the door opening prevention device 20 in the first embodiment.

[0320] The landing entrance / exit device in the sixth embodiment has the same effects as the landing entrance / exit device in the first embodiment.

[0321] Moreover, in the landing entrance / exit device in the sixth embodiment, it is possible to easily change the attachment position of the stopper 71. By bringing the lower surface of the door-opening prevention device 26 into contact with the stopper 71, the downward movement of the door-opening prevention device 26 is restricted.

[0322] It should be noted that the stopper 71 in embodiment 6 is provided in place of the stopper 28 that attaches the door-opening prevention device 26 in embodiment 1, but it is clear that it can also be provided in place of the stopper 28 that attaches the door-opening prevention device 26 in embodiments 2 and 3, the stopper 28 that attaches the door-opening prevention device 26' in embodiments 1 and 2, the stopper 28 that attaches the door-opening prevention device 22 in embodiments 1, 2 and 3, the stopper 28 that attaches the door-opening prevention device 24 in embodiments 1 and 3, and the stopper 28 that attaches the door-opening prevention device 24' in embodiment 1.

[0323] It is clear that the present invention can be applied to a landing entrance / exit device in which the landing doors move in the width direction of the landing entrance / exit to open and close the landing entrance / exit, regardless of the number of landing doors.

[0324] 1 elevator shaft, 2 landing, 3 wall, 3a opening, 4 landing entrance / exit, 5 landing three-sided jamb, 6 landing threshold, 6a groove portion, 6b groove portion, 7 vertical frame, 7a projection portion, 7b facing portion, 7c scattering portion, 7d facing portion, 7' vertical frame, 7a' projection portion, 7b' facing portion, 7c' scattering portion, 7d' facing portion, 8 upper frame, 9 landing door, 9a front portion, 9b side portion, 9c side portion, 9d return portion, 9e return portion, 9' landing door, 9a' front portion, 9b' side portion, 9c' side portion, 9d' return portion, 9e' return portion, 10 landing door, 10a front portion, 10b side portion, 10c side portion, 10d return portion, 10e Return portion, 10' landing door, 10a' front portion, 10b' side portion, 10c' side portion, 10d' return portion, 10e' return portion, 11 labyrinth-shaped gap, 11a gap, 11b gap, 11c gap, 11d gap, 12 labyrinth-shaped gap, 12a gap, 12b gap, 12c gap, 12' labyrinth-shaped gap, 12a' gap, 12b' gap, 12c' gap, 13 labyrinth-shaped gap, 13a gap, 13b gap, 13c gap, 13' labyrinth-shaped gap, 13a' gap, 13b' gap, 13c' gap, 14 landing door opening and closing device, 14a rail, 14b rail, 14c hanger, 14d roller, 15 door leg, 20 Door opening prevention device, 21 door opening prevention tool, 21a mounting plate, 21b shielding plate, 21c claw portion, 21d, through-hole, 22 door opening prevention tool, 22a mounting plate, 22b shielding plate, 22c shielding plate, 22d claw portion, 22e elongated hole, 22f through-hole, 23 door opening prevention tool, 23a claw portion, 23b through-hole, 23' door opening prevention tool, 23a' claw portion, 23b' through-hole, 24 door opening prevention tool, 24a mounting plate, 24b shielding plate, 24c shielding plate, 24d claw portion, 24e elongated hole, 24f through-hole, 24' door opening prevention tool, 24a' mounting plate, 24b' shielding plate, 24c' shielding plate, 24d' claw portion, 24e' Long hole, 24f' penetration portion, 25 door opening prevention device, 25a claw portion, 25b penetration portion, 25' door opening prevention device, 25a' claw portion, 25b' penetration portion, 26 door opening prevention device, 26a mounting plate, 26b shielding plate, 26c shielding plate, 26d claw portion, 26e long hole, 26f penetration portion, 26' door opening prevention device, 26a' mounting plate, 26b' shielding plate, 26c' shielding plate, 26d' claw portion,26e' elongated hole, 26f' through portion, 27 screw member, 27a head, 28 fastener, 31 landing door, 31a front portion, 31b side portion, 31c side portion, 31d return portion, 31e return portion, 31' landing door, 31a' front portion, 31b' side portion, 31c' side portion, 31d' return portion, 31e' return portion, 41 vertical frame, 41a recessed portion, 41b recessed portion, 41c recessed portion, 41d facing portion, 41e scattering portion, 41f facing portion, 41g scattering portion, 42 landing door, 42a front portion, 42b side portion, 42c side portion, 42d return portion, 42e return portion, 43 landing door, 43a front portion, 43b Side portion, 43c Side portion, 43d Return portion, 43e Return portion, 51 Door opening prevention device, 51a Mounting plate, 51b Shielding plate, 51c Claw portion, 51d, Penetration portion, 52 Door opening prevention device, 52a Mounting plate, 52b Shielding plate, 52c Shielding plate, 52d Shielding plate, 52e Claw portion, 52f Long hole, 52g Penetration portion, 61 Door opening prevention device, 61a Mounting plate, 61b Shielding plate, 61c Shielding plate, 61d Claw portion, 61e Penetration portion, 62 Door opening prevention device, 62a Mounting plate, 62b Shielding plate, 62c Shielding plate, 62d Claw portion, 62e Long hole, 62f Penetration portion, 63 Screw member, 71 Door opening prevention device, 71a Mounting plate, 71b Claw portion, 71c anti-detachment portion, 71 stopper, 71a head portion.

Claims

1. An elevator comprising a landing three-sided jamb, one or more landing doors, and a door opening prevention device, wherein the landing three-sided jamb forms a landing entrance / exit that connects the elevator shaft and the landing, the landing doors open / close the landing entrance / exit by moving in the width direction of the landing entrance / exit, the door opening prevention device has a pair of door opening prevention devices, a one-side door opening prevention device and an other-side door opening prevention device, and a stopper, the one-side door opening prevention device is provided on the hoistway side of the first landing door that is the landing door, and has a one-side claw portion, the other-side door opening prevention device is provided on the hoistway side of the landing three-sided jamb or the second landing door that is the landing door, and has a other-side claw portion, and the positional relationship of the one-side claw portion and the other-side claw portion in the width direction of the landing entrance / exit is reversed between a state in which the landing door closes the landing entrance / exit and a state in which the landing door opens the landing entrance / exit, an elevator landing entrance / exit device, wherein the movable claw portion which is the one-side claw portion or the other-side claw portion is provided so as to be movable downward, and furthermore, the downward movement is restricted by the stopper, the stopper melts at a temperature lower than a temperature at which the landing jamb, the landing door, the one-side door opening prevention device, and the other-side door opening prevention device melt, before the stopper melts, the one-side claw portion and the other-side claw portion do not face each other in the width direction of the landing entrance, so that the landing door is not restricted in moving in the width direction of the landing entrance, and when the stopper melts, the movable claw portion moves downward so that the one-side claw portion and the other-side claw portion face each other in the width direction of the landing entrance, so that the landing door is restricted in moving in the width direction of the landing entrance.

2. A vehicle equipped with the first landing door and the second landing door, wherein the first landing door and the second landing door face each other in a width direction of the landing entrance and open and close the landing entrance by moving in opposite directions in the width direction of the landing entrance, wherein the one-side door opening prevention device is located on the door tip side of the first landing door and has a one-side shielding plate, and the other-side door opening prevention device is provided on the second landing door and is located on the door tip side of the second landing door and has an other-side first shielding plate and an other-side second shielding plate, wherein when the first landing door and the second landing door are closing the landing entrance, a first gap extending in a depth direction of the landing entrance can be generated between the first landing door and the second landing door, the one-side shielding plate extends from the first landing door in a width direction of the landing entrance / exit and is located on a side of the second landing door opposite the landing in a depth direction of the landing entrance / exit, and a second gap extending in the width direction of the landing entrance / exit is provided between the one-side shielding plate and the first landing door, the other-side first shielding plate extends from the second landing door in a depth direction of the landing entrance / exit and is located on the second landing door side of the one-side shielding plate in the width direction of the landing entrance / exit, and a third gap extending in the depth direction of the landing entrance / exit is provided between the one-side shielding plate and the first landing door, the other-side second shielding plate extends from the other-side first shielding plate in the width direction of the landing entrance / exit toward the first landing door and is located on a side of the one-side shielding plate opposite the landing in the depth direction of the landing entrance / exit, and a fourth gap extending in the width direction of the landing entrance / exit is provided between the one-side shielding plate and the first landing door, 2. The elevator landing entrance / exit device according to claim 1, wherein the first gap, the second gap, the third gap, and the fourth gap are connected to form a labyrinth-shaped gap that bends at a plurality of points, the other-side claw portion protrudes from the other-side second shielding plate, and the one-side claw portion protrudes from the one-side shielding plate and is located on a side opposite the first landing door from the other-side claw portion in the width direction of the landing entrance / exit.

3. A vehicle comprising the first landing door and the second landing door, wherein the first landing door and the second landing door face each other in a width direction of the landing entrance and open and close the landing entrance by moving in opposite directions in the width direction of the landing entrance, wherein the one-side door-opening prevention device is located on the door tip side of the first landing door and has a one-side screening plate, wherein the other-side door-opening prevention device is provided on the second landing door and is located on the door tip side of the second landing door and has an other-side first screening plate, an other-side second screening plate, and an other-side third screening plate, wherein when the first landing door and the second landing door are in a state where they close the landing entrance, a first gap extending in a depth direction of the landing entrance can be generated between the first landing door and the second landing door, and the one-side screening plate extends from the first landing door in the depth direction of the landing entrance to the side opposite the landing, the other-side first shielding plate extends from the second landing door in a width direction of the landing entrance, and is located on a side of the first landing door opposite the landing in a depth direction of the landing entrance, and a second gap extending in the width direction of the landing entrance is provided between the other-side first shielding plate and the first landing door, the other-side second shielding plate extends from a side of the first landing door on the other-side first shielding plate opposite the landing in a depth direction of the landing entrance, and is located on a side of the one-side shielding plate opposite the landing in a width direction of the landing entrance, and a third gap extending in the depth direction of the landing entrance is provided between the one-side shielding plate and the one-side shielding plate, 2. The elevator landing entrance / exit device according to claim 1, wherein the other-side third shielding plate extends from the other-side second shielding plate in the width direction of the landing entrance on a side opposite to the second landing door, and is located on the side of the one-side shielding plate opposite to the landing in the depth direction of the landing entrance, and a fourth gap extending in the width direction of the landing entrance is provided between the other-side third shielding plate and the one-side shielding plate, the first gap, the second gap, the third gap, and the fourth gap are connected to form a labyrinth-shaped gap that bends at a plurality of points, the other-side claw portion protrudes from the other-side third shielding plate, and the one-side claw portion protrudes from the one-side shielding plate and is located closer to the second landing door than the other-side claw portion in the width direction of the landing entrance.

4. The landing three-sided jamb has a vertical frame forming a side of the landing entrance / exit, and is equipped with the first landing door, the first landing door faces the vertical frame in the width direction of the landing entrance / exit, and opens and closes the landing entrance / exit by moving the landing entrance / exit side of the vertical frame in the width direction of the landing entrance / exit, the one-side door opening prevention device is located on the door tip side of the first landing door, and has a one-side screening plate, the other-side door opening prevention device is provided on the vertical frame, and has an other-side first screening plate and an other-side second screening plate, and in a state in which the first landing door closes the landing entrance / exit, a first gap extending in the depth direction of the landing entrance / exit is provided between the first landing door and the vertical frame, the one-side shielding plate extends from the first landing door in the width direction of the landing entrance / exit, and is located on the side of the vertical frame opposite to the landing in the depth direction of the landing entrance / exit, and a second gap extending in the width direction of the landing entrance / exit is provided between the one-side shielding plate and the vertical frame, the other-side first shielding plate extends from the vertical frame to the side opposite to the landing in the depth direction of the landing entrance / exit, and is located on the side of the one-side shielding plate toward the vertical frame in the width direction of the landing entrance / exit (4), and a third gap extending in the depth direction of the landing entrance / exit is provided between the one-side shielding plate and the other-side second shielding plate extends from the other-side first shielding plate in the width direction of the landing entrance / exit toward the first landing door, and is located on the side of the one-side shielding plate opposite to the landing in the depth direction of the landing entrance / exit, and a fourth gap extending in the width direction of the landing entrance / exit is provided between the one-side shielding plate and the other-side first shielding plate 2. The elevator landing entrance / exit device according to claim 1, wherein the first gap, the second gap, the third gap, and the fourth gap are connected to form a labyrinth-shaped gap that bends at a plurality of points, the other-side claw portion protrudes from the other-side second shielding plate, and the one-side claw portion protrudes from the one-side shielding plate and is located on a side opposite the first landing door from the other-side claw portion in the width direction of the landing entrance / exit.

5. The landing three-sided jamb has a vertical frame forming a side of the landing entrance / exit, and is equipped with the first landing door, the first landing door faces the vertical frame in the width direction of the landing entrance / exit, and opens and closes the landing entrance / exit by moving the side of the vertical frame that faces the landing entrance / exit in the width direction of the landing entrance / exit, the one-side door opening prevention device is located on the door tip side of the first landing door, and has a one-side screening plate, the other-side door opening prevention device is provided on the vertical frame, and has an other-side first screening plate, an other-side second screening plate, and an other-side third screening plate, when the first landing door is in a state where it closes the landing entrance / exit, a first gap extending in the depth direction of the landing entrance / exit is provided between the first landing door and the vertical frame, and the one-side screening plate extends from the first landing door in the depth direction of the landing entrance / exit to the side opposite the landing, the other-side first shielding plate extends from the vertical frame in a width direction of the landing entrance / exit, and is located on the side of the first landing door opposite the landing in a depth direction of the landing entrance / exit, and a second gap extending in the width direction of the landing entrance / exit is provided between the other-side first shielding plate and the landing first door, the other-side second shielding plate extends from the side of the first landing door of the other-side first shielding plate to the side opposite the landing in a depth direction of the landing entrance / exit, and is located on the side of the vertical frame of the one-side shielding plate in the width direction of the landing entrance / exit, and a third gap extending in the depth direction of the landing entrance / exit is provided between the one-side shielding plate and the other-side second shielding plate, 2. The elevator landing entrance / exit device according to claim 1, wherein the other-side third shielding plate extends from the other-side second shielding plate in the width direction of the landing entrance / exit on a side opposite to the vertical frame, and is located on the side of the one-side shielding plate opposite to the landing in the depth direction of the landing entrance / exit, and is provided with a fourth gap extending in the width direction of the landing entrance / exit between the one-side shielding plate and the other-side third shielding plate, the first gap, the second gap, the third gap, and the fourth gap are connected to form a labyrinth-shaped gap that bends at a plurality of points, the other-side claw portion protrudes from the other-side third shielding plate, and the one-side claw portion protrudes from the one-side shielding plate and is located closer to the vertical frame in the width direction of the landing entrance / exit than the other-side claw portion.

6. A vehicle comprising the first landing door and the second landing door, wherein the first landing door and the second landing door open and close the landing entrance by moving in the same direction in the width direction of the landing entrance, and the first landing door opens and closes the landing entrance by moving at a faster speed than the second landing door, wherein the cross section of the door tip portion of the second landing door forms a groove shape that opens toward the door tail side of the second landing door, so that the inside of the door tip portion of the second landing door is connected to the elevator shaft, wherein the one-side door opening prevention device is located on the door tail side of the first landing door and has an other-side first shielding plate and an other-side second shielding plate, and wherein the other-side door opening prevention device is provided on the second landing door and is located on the door tip side of the second landing door, and when the first landing door and the second landing door are closing the landing entrance, a door end portion of the first landing door is located on a side of the elevator shaft at a door end portion of the second landing door in a depth direction of the landing entrance, and a first gap extending in a width direction of the landing entrance is provided between the door end portion of the second landing door, the one-side first shielding plate extends from the first landing door to a side of the landing in a depth direction of the landing entrance, and is located on a door end side of the second landing door at the door end portion of the second landing door in a width direction of the landing entrance, and a second gap extending in the depth direction of the landing entrance is provided between the door end portion of the second landing door, and the one-side second shielding plate extends from the one-side first shielding plate to a door end side of the second landing door in a width direction of the landing entrance, and is located inside the door end portion of the second landing door, and a third gap extending in the width direction of the landing entrance is provided between the door end portion of the second landing door, 2. The elevator landing entrance / exit device according to claim 1, wherein the first gap, the second gap, and the third gap are connected to form a labyrinth-shaped gap that bends at a plurality of points, the one-side claw portion protrudes from the one-side second shielding plate, and the other-side claw portion is located closer to the door tail of the second landing door than the one-side claw portion in the width direction of the landing entrance / exit.

7. The landing three-sided jamb has a vertical frame that forms a side of the landing entrance / exit, a cross section of the vertical frame forms a groove shape that opens toward the side opposite the landing entrance / exit, so that the inside of the vertical frame is connected to the elevator shaft, the first landing door is provided, the first landing door does not face the vertical frame in the width direction of the landing entrance / exit, and opens and closes the landing entrance / exit by moving in the width direction of the landing entrance / exit between the side of the vertical frame that is at the landing entrance / exit and the side of the vertical frame that is opposite the landing entrance / exit, the one-side door opening prevention device is located on the door tail side of the first landing door and has a one-side first shielding plate and a one-side second shielding plate, the other-side door opening prevention device is provided on the vertical frame, and in a state where the first landing door closes the landing entrance / exit, a door end portion of the first landing door is located on the side of the vertical frame that faces the elevator shaft in the depth direction of the landing entrance, and a first gap extending in the width direction of the landing entrance is provided between the door end portion and the vertical frame; the one-side first shielding plate extends from the first landing door toward the landing in the depth direction of the landing entrance, and is located on the side of the vertical frame opposite the landing entrance in the width direction of the landing entrance, and a second gap extending in the depth direction of the landing entrance is provided between the door end portion and the vertical frame; the one-side second shielding plate extends from the one-side first shielding plate toward the landing entrance in the width direction of the landing entrance, and is located inside the vertical frame, and a third gap extending in the width direction of the landing entrance is provided between the door end portion and the vertical frame; the first gap, the second gap, and the third gap are continuous to form a labyrinth-shaped gap that bends at a plurality of points; the one-side claw portion protrudes from the one-side second shielding plate, The elevator hall entrance / exit device according to claim 1, wherein the other-side claw portion is located on a side opposite to the hall entrance relative to the one-side claw portion in a width direction of the hall entrance.

8. An elevator landing entrance / exit device according to any one of claims 1 to 7, further comprising a locking device that restricts the upper part of the landing door from moving toward the side that opens the landing entrance when the landing door is in a state where the landing door closes the landing entrance / exit, and the one-side claw portion and the other-side claw portion are not provided on the upper parts of the landing door and the landing three-sided jamb.

Images