Elevator door device

Abstract

An elevator door device, wherein a sill-side dislodging prevention member has: a sill-side fixing portion that is fixed in a sill groove; and a sill-side protruding portion that protrudes from the sill-side fixing portion in the opening direction, which is the direction of movement of a door when the door opens an elevator doorway. A door-side dislodging prevention member has: a door-side fixing portion that is fixed to the lower portion of the door body; and a door-side protruding portion that protrudes from the door-side fixing portion in the closing direction, which is the direction of movement of the door when the door closes the elevator doorway. When the elevator doorway is fully closed by the door, at least a portion of the door-side protruding portion is located in the sill groove at a position separated downward from the sill-side protruding portion.

Description

[Technical field]

[0001] The present disclosure relates to an elevator door device that opens and closes an elevator doorway. [Background technology]

[0002] In a conventional elevator door device, a guide shoe is attached to the lower end of a sliding door that opens and closes the elevator entrance. A guide groove is provided on the threshold of the elevator entrance. The guide shoe is inserted into the guide groove. In a conventional elevator door device, when the sliding door is subjected to an external force, the sliding door may bend, causing the guide shoe to come out of the guide groove.

[0003] Conventionally, elevator door devices have been proposed that have steps formed on the side of the guide groove to prevent the guide shoe from coming off the guide groove. When an external force acts on the sliding door, a part of the guide shoe gets caught on the step of the guide groove, preventing the guide shoe from coming off the guide groove (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-208745 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the conventional elevator door device shown in Patent Document 1 requires the manufacture of a special threshold with a step formed on the side of the guide groove. Therefore, the manufacture of the threshold is time-consuming, which in turn makes the manufacture of the elevator door device time-consuming.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide an elevator door device that can be easily manufactured. [Means for solving the problem]

[0007] The elevator door device according to the present disclosure comprises a threshold provided at the bottom of an elevator entrance and having a threshold groove provided along the width direction of the elevator entrance, a door that opens and closes the elevator entrance by moving along the width direction of the elevator entrance, and a door removal prevention structure, the door has a door body and an insertion part provided at the bottom of the door body, the insertion part having a first guide member inserted into the threshold groove, the door removal prevention structure has a threshold side removal prevention member and a door side removal prevention member, the threshold side removal prevention member has a threshold side fixed part fixed within the threshold groove and a threshold side protruding part protruding from the threshold side fixed part in the opening direction which is the direction of movement of the door when the door opens the elevator entrance, and the door side removal prevention member has a door side fixed part fixed to the bottom of the door body and a door side protruding part protruding from the door side fixed part in the closing direction which is the direction of movement of the door when the door closes the elevator entrance, When the door is fully closing the elevator entrance, at least a part of the door-side protrusion is located in the threshold groove at a position spaced downward from the threshold-side protrusion, The threshold side protrusion has a threshold side arm portion protruding in the opening direction from the threshold side fixed portion and a threshold side hook portion protruding downward from the threshold side arm portion, and the door side protrusion has a door side arm portion protruding in the closing direction from the door side fixed portion and a door side hook portion protruding upward from the door side arm portion, and when the door is fully closing the elevator entrance, the position of the door side hook portion is closer to the threshold side fixed portion than the position of the threshold side hook portion. Effect of the Invention

[0008] According to the elevator door device according to the present disclosure, the elevator door device can be easily manufactured. [Brief description of the drawings]

[0009] [Figure 1] 1 is an upper side view showing an elevator according to embodiment 1. FIG. [Diagram 2] FIG. 2 is a front view showing the car door device of FIG. 1. [Diagram 3] FIG. 3 is an enlarged view showing a portion III in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 3 is an enlarged view showing a portion V in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. [Figure 7] 4 is an enlarged view showing the position of the car sill relative to the car door when the car sill of FIG. 3 is recessed by a limit distance E relative to the car body. FIG. [Figure 8] 4 is an enlarged view showing a state in which the door-side protrusion in FIG. 3 is hooked from below on the threshold-side protrusion. FIG. [Figure 9] 5 is a cross-sectional view showing a state in which the first guide member in FIG. 4 has been displaced upward from the threshold groove. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment will be described with reference to the drawings. Embodiment 1 FIG 1 is a side view of an upper portion of an elevator according to embodiment 1. In the figure, a machine room 2 is provided at the top of a hoistway 1. A hoisting machine 3, which is a driving device, is installed in the machine room 2. The hoisting machine 3 has a driving sheave 4. The driving sheave 4 rotates by the driving force of the hoisting machine 3.

[0011] A plurality of suspension bodies 5 are wound around the driving sheave 4. A rope or a belt is used as the suspension bodies 5. A car 6 and a counterweight (not shown) are suspended in the hoistway 1 by the plurality of suspension bodies 5. The car 6 and the counterweight move up and down in the hoistway 1 as the driving sheave 4 rotates.

[0012] The car 6 is provided with a car entrance 7 as an elevator entrance. The car 6 is also provided with a car door device 20 as an elevator door device. The car door device 20 is provided with a door drive device (not shown). The car door device 20 opens and closes the car entrance 7 by the drive force of the door drive device.

[0013] A landing entrance 9 serving as an elevator entrance is provided at the landing 8 on each floor. At each floor, the space in the elevator shaft 1 is opened to the landing 8 through the landing entrance 9. When the car 6 is stopped at any of the floors, the car entrance 7 faces the landing entrance 9 provided at the floor where the car 6 is stopped.

[0014] Each floor is provided with a landing door device 40 as an elevator door device. The landing door device 40 opens and closes a landing entrance / exit 9. At a floor where the car 6 is stopped, the car door device 20 and the landing door device 40 face each other. This allows the landing door device 40 to be linked with the car door device 20. At a floor where the car 6 is stopped, the car entrance / exit 7 is opened and closed to open and close the landing entrance / exit 9.

[0015] The car 6 has a car body 61 and a car floor 62. The car entrance 7 is provided in the car body 61. In the car body 61, an internal space of the car is formed.

[0016] At a floor where the car 6 is stopped, elevator users can enter the car interior space of the car body 61 from the hall 8 through the hall entrance 9 and the car entrance 7. Also, at a floor where the car 6 is stopped, elevator users can get off at the hall 8 from the car interior space of the car body 61 through the car entrance 7 and the hall entrance 9.

[0017] The car 6 is provided with a vibration isolation device (not shown) and a stopper member (not shown). The car floor 62 is supported by the lower part of the car body 61 via the vibration isolation device. When a user who has entered the car space inside the car body 61 stands on the car floor 62, the car floor 62 receives a downward load from the user. The vibration isolation device deforms according to the magnitude of the load received by the car floor 62.

[0018] The position of the car floor 62 relative to the car body 61 is a floor reference position when the car floor 62 is not receiving a load. When the car floor 62 receives a downward load, the car floor 62 sinks downward from the floor reference position relative to the car body 61 according to the magnitude of the load received by the car floor 62.

[0019] The stopper member limits the amount of sinking of the car floor 62 relative to the car body 61. When the car floor 62 is displaced downward by the limit distance E from the floor reference position relative to the car body 61, the position of the car floor 62 relative to the car body 61 becomes the floor lower limit position. At this time, the downward displacement of the car floor 62 relative to the car body 61 is prevented by the stopper member. That is, in the car 6, the car floor 62 is prevented from sinking downward relative to the car body 61 beyond the floor lower limit position.

[0020] Fig. 2 is a front view showing the car door device 20 in Fig. 1. Fig. 2 shows the car door device 20 as viewed from the landing 8 side. The car door device 20 has a car door support member 21, a car sill 22, a pair of car doors 23, and a pair of door removal prevention structures 24.

[0021] The car door support member 21 is disposed above the car entrance 7. In addition, the car door support member 21 is fixed to the car 6. The car door support member 21 has a car hanger case 211 and a car door rail 212.

[0022] The car hanger case 211 is fixed to the car main body 61. The car door rail 212 is fixed to the car hanger case 211. The car door rail 212 is disposed along the frontage direction of the car entrance 7. That is, the car door rail 212 is disposed along the left-right direction in FIG.

[0023] The car threshold 22 is a threshold fixed to the car floor 62. The car threshold 22 is provided at the lower part of the car entrance 7. The car threshold 22 is also arranged along the frontage direction of the car entrance 7. A threshold groove 25 is provided in the car threshold 22 along the frontage direction of the car entrance 7. The threshold groove 25 is open upward.

[0024] The pair of car doors 23 are hung on car door rails 212. In addition, the pair of car doors 23 are guided by the car door rails 212, and are thereby movable along the opening direction of the car entrance 7.

[0025] The car hanger case 211 is provided with a car door interlocking mechanism (not shown). The car door interlocking mechanism interlocks the pair of car doors 23 with each other. This allows the pair of car doors 23 to move in opposite directions to each other along the width direction of the car entrance 7.

[0026] A door drive device is also provided in the car hanger case 211. The door drive device generates a drive force for moving the pair of car doors 23. The drive force of the door drive device is transmitted to the pair of car doors 23 via a car door interlocking mechanism. The car entrance 7 is opened and closed by the drive force of the door drive device moving the pair of car doors 23 in opposite directions to each other.

[0027] A car door fully closed reference line P is set at the car entrance 7. The car door fully closed reference line P is a vertical line passing through the center of the car entrance 7 in the frontage direction. The pair of car doors 23 open the car entrance 7 by moving in a direction away from the car door fully closed reference line P. Also, the pair of car doors 23 close the car entrance 7 by moving in a direction approaching the car door fully closed reference line P. That is, in this embodiment, the car door device 20 is a center-opening type door device.

[0028] Each car door 23 has a door hanger 231 , a door body 232 , and an insertion portion 233 .

[0029] The door hanger 231 is hung on the car door rail 212. The door hanger 231 is fixed to the upper end portion of the door main body 232.

[0030] The door main body 232 is a panel suspended from the car door rail 212 via a door hanger 231. When the door hanger 231 moves along the car door rail 212, the door main body 232 opens and closes the car entrance 7.

[0031] The insertion portion 233 is provided at the bottom of the door body 232. The insertion portion 233 is inserted into the threshold groove 25 of the car threshold 22.

[0032] The insertion portion 233 has a first guide member 234 and a second guide member 235. The first guide member 234 and the second guide member 235 are provided on the lower part of the door main body 232, respectively.

[0033] Here, the moving direction of the car door 23 when the car door 23 closes the car entrance 7 is defined as the closing direction. Also, the moving direction of the car door 23 when the car door 23 opens the car entrance 7 is defined as the opening direction. In this case, the position of the second guide member 235 is away from the position of the first guide member 234 in the opening direction.

[0034] Of both ends of the door body 232 in the opening direction of the car entrance 7, the end closer to the car door fully closed reference line P is defined as the door closed end, and the end farther from the car door fully closed reference line P is defined as the door open end. In this case, the first guide member 234 is provided at the lower part of the door closed end of the door body 232. The second guide member 235 is provided at the lower part of the door open end of the door body 232.

[0035] Each of the first guide member 234 and the second guide member 235 is inserted into the threshold groove 25 of the car threshold 22. Each car door 23 moves along the opening direction of the car entrance 7 while maintaining a state in which each of the first guide member 234 and the second guide member 235 is inserted into the threshold groove 25.

[0036] Of the pair of door removal prevention structural parts 24, one door removal prevention structural part 24 corresponds to one car door 23, and the other door removal prevention structural part 24 corresponds to the other car door 23. Each of the pair of door removal prevention structural parts 24 makes it difficult for the insertion part 233 of the corresponding car door 23 to come out of the threshold groove 25. Each door removal prevention structural part 24 has a door-side removal prevention member 26, a threshold-side removal prevention member 27, and an additional removal prevention member 28.

[0037] The threshold-side deviation prevention member 27 is a separate member from the car threshold 22. The threshold-side deviation prevention member 27 is fixed inside the threshold groove 25. The threshold-side deviation prevention member 27 is disposed at a position away in the closing direction from the position of the first guide member 234 when the car door 23 fully closes the car entrance 7.

[0038] The threshold side removal prevention members 27 of the pair of door removal prevention structures 24 are disposed in symmetrical positions with respect to the car door full-closing reference line P. In this embodiment, the threshold side removal prevention members 27 of the pair of door removal prevention structures 24 are connected to each other and integrated.

[0039] The door-side removal prevention member 26 and the additional removal prevention member 28 are fixed to the bottom of the car door 23. Furthermore, the door-side removal prevention member 26 and the additional removal prevention member 28 are inserted into the threshold groove 25. The position of the additional removal prevention member 28 is away from the position of the door-side removal prevention member 26 in the opening direction. In this embodiment, the door-side removal prevention member 26 is fixed to the bottom of the door closing side end of the door main body 232. Furthermore, in this embodiment, the additional removal prevention member 28 is fixed to the bottom of the door opening side end of the door main body 232.

[0040] The door-side removal prevention member 26 and the additional removal prevention member 28 move in a direction approaching the threshold-side removal prevention member 27 as the car door 23 moves in the closing direction. Also, the door-side removal prevention member 26 and the additional removal prevention member 28 move in a direction away from the threshold-side removal prevention member 27 as the car door 23 moves in the opening direction.

[0041] Fig. 3 is an enlarged view showing part III in Fig. 2. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3. The first guide member 234 has a first mounting plate 236 and a first shoe 237.

[0042] The first mounting plate 236 is fixed to the surface of the door body 232 on the landing 8 side. The first mounting plate 236 protrudes from the lower part of the door body 232 into the threshold groove 25. Here, the direction that is perpendicular to the longitudinal direction of the threshold groove 25 and horizontal is defined as the width direction of the threshold groove 25. In this case, the first mounting plate 236 is fixed to the lower part of the door body 232 with the thickness direction of the first mounting plate 236 coinciding with the width direction of the threshold groove 25.

[0043] The first shoe 237 is fixed to a lower end of the first mounting plate 236. The first shoe 237 is located within the threshold groove 25. As shown in Fig. 4, the dimension of the first shoe 237 in the width direction of the threshold groove 25 is larger than the dimension of the first mounting plate 236 in the width direction of the threshold groove 25. When the door-side removal prevention member 26 is viewed along the opening direction of the car entrance 7, the door-side removal prevention member 26 is located within the range of the first shoe 237 in the width direction of the threshold groove 25.

[0044] As shown in Fig. 4, the inner surface of the threshold groove 25 has a first groove side surface 251, a second groove side surface 252, and a groove bottom surface 253. The first groove side surface 251 and the second groove side surface 252 face each other in the width direction of the threshold groove 25. The position of the second groove side surface 252 is closer to the car floor 62 than the position of the first groove side surface 251. The groove bottom surface 253 is the bottom surface of the threshold groove 25. In other words, the groove bottom surface 253 is a surface that connects the lower ends of the first groove side surface 251 and the second groove side surface 252.

[0045] The upper surface of the car sill 22 has a sill first upper surface 223 adjacent to the groove first side surface 251, and a sill second upper surface 224 adjacent to the groove second side surface 252. The position of the sill second upper surface 224 is closer to the car floor 62 than the position of the sill first upper surface 223.

[0046] A groove first upper inclined surface 254 is formed between the threshold first upper surface 223 and the groove first side surface 251. The groove first upper inclined surface 254 is an inclined surface that inclines downward from the threshold first upper surface 223 toward the groove first side surface 251. As a result, the groove first upper inclined surface 254 inclines downward from the threshold first upper surface 223 toward the inside of the threshold groove 25.

[0047] A groove second upper inclined surface 255 is formed between the threshold second upper surface 224 and the groove second side surface 252. The groove second upper inclined surface 255 is an inclined surface that slopes downward from the threshold second upper surface 224 toward the groove second side surface 252. As a result, the groove second upper inclined surface 255 slopes downward from the threshold second upper surface 224 toward the inside of the threshold groove 25.

[0048] The outer surface of the first shoe 237 has a first guide first side surface 234a, a first guide second side surface 234b, a first guide lower surface 234c, a first guide first lower inclined surface 234d, and a first guide second lower inclined surface 234e.

[0049] The first guide first side surface 234a faces the groove first side surface 251. The first guide second side surface 234b faces the groove second side surface 252. As a result, the first guide first side surface 234a and the first guide second side surface 234b face opposite sides to each other in the width direction of the threshold groove 25. When the door-side removal prevention member 26 is viewed along the opening direction of the car entrance 7, the door-side removal prevention member 26 is located between the first guide first side surface 234a and the first guide second side surface 234b.

[0050] The first guide lower surface 234c is the lower surface of the first shoe 237. The first guide lower surface 234c faces the groove bottom surface 253. As a result, the first guide lower surface 234c faces downward. When viewed from above, the first guide lower surface 234c is located in the range between the first guide first side surface 234a and the first guide second side surface 234b.

[0051] The first guide first lower inclined surface 234d is formed between the first guide first side surface 234a and the first guide bottom surface 234c. The first guide first lower inclined surface 234d is an inclined surface that inclines upward from the first guide bottom surface 234c toward the first guide first side surface 234a. As a result, the first guide first lower inclined surface 234d is inclined downward from the lower end of the first guide first side surface 234a toward the inside of the first shoe 237 in the width direction of the threshold groove 25.

[0052] The first guide second lower inclined surface 234e is formed between the first guide second side surface 234b and the first guide lower surface 234c. The first guide second lower inclined surface 234e is an inclined surface that inclines upward from the first guide lower surface 234c toward the first guide second side surface 234b. As a result, the first guide second lower inclined surface 234e is inclined downward from the lower end of the first guide second side surface 234b toward the inside of the first shoe 237 in the width direction of the threshold groove 25.

[0053] Here, the dimension of the groove first upper inclined surface 254 in the width direction of the threshold groove 25 is the groove inclination dimension A1. Also, the dimension of the first guide first lower inclined surface 234d in the width direction of the threshold groove 25 is the first guide inclination dimension B1. Furthermore, the distance from the first guide first side surface 234a to the door side removal prevention member 26 in the width direction of the threshold groove 25 is the first offset distance C1. In this case, the sum of the groove inclination dimension A1 and the first guide inclination dimension B1 is greater than the first offset distance C1. That is, the relationship A1+B1>C1 is established. Also, in this embodiment, the first offset distance C1 is greater than the first guide inclination dimension B1. That is, the relationship C1>B1 is established.

[0054] 3, the upper surface of the threshold-side anti-slip member 27 is located at the same height as the upper surface of the car threshold 22. The cross-sectional shape of the threshold-side anti-slip member 27 in a plane perpendicular to the width direction of the threshold groove 25 is the same at any position in the width direction of the threshold groove 25. The threshold-side anti-slip member 27 has a threshold-side fixed portion 271 and a threshold-side protruding portion 272.

[0055] The threshold side fixing portion 271 is fixed in the threshold groove 25. In the pair of door removal prevention structures 24, the threshold side fixing portions 271 of the threshold side removal prevention members 27 are connected to each other. Each threshold side fixing portion 271 that is connected to each other and integrated is formed with a fixing surface 271a that overlaps with the groove bottom surface 253. A screw hole is provided in the fixing surface 271a.

[0056] The car sill 22 is provided with a bolt through hole 221 and a plurality of discharge holes 222. The bolt through hole 221 and each discharge hole 222 are through holes that reach the lower surface of the car sill 22 from the groove bottom surface 253.

[0057] A fixing bolt 29 serving as a fastener is passed through the bolt-through hole 221. Each discharge hole 222 is a through-hole for discharging foreign matter in the threshold groove 25 below the car threshold 22. The discharge holes 222 are provided at least in positions below the door-side removal prevention member 26 and the additional removal prevention member 28 when the car door 23 fully closes the car entrance 7.

[0058] A fixing bolt 29 passed through the bolt through hole 221 is screwed into a screw hole provided in the fixing surface 271a. Each threshold side fixing part 271, which is connected to one another and integrated, is fixed to the groove bottom surface 253 by the fixing bolt 29 passed through the bolt through hole 221. This makes each threshold side fixing part 271 detachable from the groove bottom surface 253. Therefore, each threshold side anti-fall-out member 27 is detachable from the car threshold 22.

[0059] The threshold side protrusion 272 protrudes in the opening direction from the threshold side fixed part 271. In this embodiment, the threshold side protrusion 272 protrudes in the opening direction from the upper end of the threshold side fixed part 271. As a result, the threshold side protrusion 272 is held in a position spaced upward from the groove bottom surface 253.

[0060] The threshold side protrusion 272 has a threshold side arm 272a and a threshold side hook 272b. The threshold side arm 272a protrudes in the opening direction from the threshold side fixed part 271. The threshold side hook 272b protrudes downward from the threshold side arm 272a. In this embodiment, the threshold side hook 272b is provided at one of both ends of the threshold side arm 272a that is farther from the threshold side fixed part 271.

[0061] The door-side anti-fall-out member 26 is a plate-shaped member perpendicular to the width direction of the threshold groove 25. The cross-sectional shape of the door-side anti-fall-out member 26 in a plane perpendicular to the width direction of the threshold groove 25 is the same at any position in the width direction of the threshold groove 25.

[0062] The first guide member 234 and the door side removal prevention member 26 are fixed to the lower part of the door main body 232 by a plurality of fixing bolts 30. Each fixing bolt 30 is a common fastener that fixes the first guide member 234 and the door side removal prevention member 26 to the lower part of the door main body 232. In this embodiment, the first guide member 234 and the door side removal prevention member 26 are fastened together to the lower part of the door main body 232 by two fixing bolts 30.

[0063] The door-side anti-fall-out member 26 has a door-side fixed portion 261 and a door-side protruding portion 262 .

[0064] The door-side fixing portion 261 has a fixing main body portion 261a and a downward protrusion portion 261b. A plurality of elongated holes 263 are provided in the fixing main body portion 261a. The plurality of elongated holes 263 are provided at positions spaced apart from each other in the frontage direction of the car entrance 7. Each of the elongated holes 263 is a elongated hole along the vertical direction. In this embodiment, two elongated holes 263 are provided in the fixing main body portion 261a.

[0065] A portion of the fixed main body portion 261a overlaps with the first mounting plate 236 of the first guide member 234. Each fixing bolt 30 is passed through each oblong hole 263. The fixing bolt 30 passed through the oblong hole 263 penetrates the first mounting plate 236 and is screwed into the lower part of the door main body 232. In this way, the first guide member 234 and the door-side anti-detachment member 26 are fixed to the lower part of the door main body 232. The position of the door-side anti-detachment member 26 with respect to the door main body 232 can be adjusted in the vertical direction by loosening the fastening of each fixing bolt 30.

[0066] The downward protrusion 261b protrudes downward from the fixed main body 261a. The downward protrusion 261b is disposed at a position shifted in the closing direction from the first shoe 237, that is, at a position closer to the threshold-side anti-fall-out member 27 than the first shoe 237. As a result, the door-side anti-fall-out member 26 is fixed to the lower part of the door main body 232, avoiding the first shoe 237.

[0067] The downward protrusion 261b protrudes from the fixed main body 261a to a position closer to the groove bottom surface 253 than the position of the first shoe 237. As a result, the position of the lower end of the door-side anti-fall-out member 26 is lower than the position of the lower end of the first guide member 234.

[0068] The door-side protrusion 262 protrudes in the closing direction from the downward protrusion 261b of the door-side fixed part 261. In this embodiment, the door-side protrusion 262 protrudes in the closing direction from the lower end of the downward protrusion 261b. As a result, the door-side protrusion 262 is held in a position lower than both the threshold-side protrusion 272 and the first shoe 237.

[0069] The door side protruding portion 262 has a door side arm portion 262a and a door side hook portion 262b. The door side arm portion 262a protrudes in the closing direction from the downward protruding portion 261b. The door side hook portion 262b protrudes upward from the door side arm portion 262a. In this embodiment, the door side hook portion 262b is provided at one of both end portions of the door side arm portion 262a that is farther from the door side fixed portion 261.

[0070] When the car door 23 fully closes the car entrance 7, the door-side fixing portion 261 is located at a position farther in the opening direction than the threshold-side coming-out prevention member 27. Furthermore, when the car door 23 fully closes the car entrance 7, a part of the door-side protrusion 262 is located at a position downwardly away from the threshold-side protrusion 272 within the threshold groove 25. As a result, when the door-side coming-out prevention member 26 and the threshold-side coming-out prevention member 27 are viewed from above, when the car door 23 fully closes the car entrance 7, a part of the door-side protrusion 262 overlaps the area of ​​the threshold-side protrusion 272. Furthermore, when the car door 23 fully closes the car entrance 7, the position of the door-side hook 262b is closer to the threshold-side fixing portion 271 than the position of the threshold-side hook 272b.

[0071] In a state in which the car door 23 fully closes the car entrance 7 and the car floor 62 is not receiving a downward load, the vertical distance from the threshold-side protrusion 272 to the door-side protrusion 262 is the allowable distance D. The allowable distance D is greater than the limit distance E when the car floor 62 sinks from the floor reference position to the floor lower limit position.

[0072] Fig. 5 is an enlarged view showing a portion V in Fig. 2. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 5. The second guide member 235 has a second mounting plate 238 and a second shoe 239.

[0073] The second mounting plate 238 is fixed to a surface of the door body 232 on the landing 8 side. In addition, the second mounting plate 238 protrudes into the threshold groove 25 from the lower part of the door body 232. The second mounting plate 238 is fixed to the lower part of the door body 232 with the thickness direction of the second mounting plate 238 coinciding with the width direction of the threshold groove 25.

[0074] The second shoe 239 is fixed to the lower end of the second mounting plate 238. The second shoe 239 is located within the threshold groove 25. The dimension of the second shoe 239 in the width direction of the threshold groove 25 is larger than the dimension of the second mounting plate 238 in the width direction of the threshold groove 25, as shown in Fig. 6. When the additional removal prevention member 28 is viewed along the frontage direction of the car entrance 7, the additional removal prevention member 28 is located within the range of the second shoe 239 in the width direction of the threshold groove 25.

[0075] The outer surface of the second shoe 239 has a second guide first side surface 235a, a second guide second side surface 235b, a second guide lower surface 235c, a second guide first lower inclined surface 235d, and a second guide second lower inclined surface 235e.

[0076] The second guide first side surface 235a faces the groove first side surface 251. The second guide second side surface 235b faces the groove second side surface 252. As a result, the second guide first side surface 235a and the second guide second side surface 235b face opposite each other in the width direction of the threshold groove 25. When the additional removal prevention member 28 is viewed along the frontage direction of the car entrance 7, the additional removal prevention member 28 is located between the second guide first side surface 235a and the second guide second side surface 235b.

[0077] The second guide lower surface 235c is the lower surface of the second shoe 239. The second guide lower surface 235c faces the groove bottom surface 253. As a result, the second guide lower surface 235c faces downward. When viewed from above, the second guide lower surface 235c is located in the range between the second guide first side surface 235a and the second guide second side surface 235b.

[0078] The second guide first lower inclined surface 235d is formed between the second guide first side surface 235a and the second guide lower surface 235c. The second guide first lower inclined surface 235d is an inclined surface that inclines upward from the second guide lower surface 235c toward the second guide first side surface 235a. As a result, the second guide first lower inclined surface 235d is inclined downward from the lower end of the second guide first side surface 235a toward the inside of the second shoe 239 in the width direction of the threshold groove 25.

[0079] The second guide second lower inclined surface 235e is formed between the second guide second side surface 235b and the second guide lower surface 235c. The second guide second lower inclined surface 235e is an inclined surface that inclines upward from the second guide lower surface 235c toward the second guide second side surface 235b. As a result, the second guide second lower inclined surface 235e is inclined downward from the lower end of the second guide second side surface 235b toward the inside of the second shoe 239 in the width direction of the threshold groove 25.

[0080] Here, the dimension of the second guide first lower inclined surface 235d in the width direction of the threshold groove 25 is the second guide inclination dimension B2. Also, the distance from the second guide first side surface 235a to the additional fall-off prevention member 28 in the width direction of the threshold groove 25 is the second offset distance C2. In this case, the sum of the groove inclination dimension A1 and the second guide inclination dimension B2 is greater than the second offset distance C2. That is, the relationship A1+B2>C2 is established. Also, in this embodiment, the second offset distance C2 is greater than the second guide inclination dimension B2. That is, the relationship C2>B2 is established.

[0081] The additional removal prevention member 28 is a plate-shaped member perpendicular to the width direction of the threshold groove 25. The second guide member 235 and the additional removal prevention member 28 are fixed to the lower part of the door main body 232 by a plurality of fixing bolts 31. Each fixing bolt 31 is a common fastener that fixes the second guide member 235 and the additional removal prevention member 28 to the lower part of the door main body 232. In this embodiment, the second guide member 235 and the additional removal prevention member 28 are fastened together to the lower part of the door main body 232 by two fixing bolts 31.

[0082] The additional removal prevention member 28 has an additional fixing portion 281 and an additional protruding portion 282 .

[0083] The additional fixing portion 281 has a fixing main body portion 281a and a downward protruding portion 281b. A plurality of long holes 283 are provided in the fixing main body portion 281a. The plurality of long holes 283 are provided apart from each other in the frontage direction of the car entrance 7. The long axis of each long hole 283 is an axis along the vertical direction. In this embodiment, two long holes 283 are provided in the fixing main body portion 281a.

[0084] A portion of the fixed main body portion 281a overlaps with the second mounting plate 238 of the second guide member 235. Each fixing bolt 31 is passed through each oblong hole 283. The fixing bolt 31 passed through the oblong hole 283 penetrates the second mounting plate 238 and is screwed into the lower part of the door main body 232. In this way, the second guide member 235 and the additional removal prevention member 28 are fixed to the lower part of the door main body 232. Therefore, the position of the additional removal prevention member 28 with respect to the door main body 232 can be adjusted in the vertical direction by loosening the fastening of each fixing bolt 31.

[0085] The downward protruding portion 281b protrudes downward from the fixed main body portion 281a. The downward protruding portion 281b is disposed at a position shifted in the opening direction from the second shoe 239. As a result, the additional removal prevention member 28 is fixed to the lower portion of the door main body 232, avoiding the second shoe 239.

[0086] The downward protruding portion 281b protrudes from the fixed main body portion 281a to a position closer to the groove bottom surface 253 than the position of the second shoe 239. As a result, the position of the lower end of the additional removal prevention member 28 is lower than the position of the lower end of the second guide member 235.

[0087] The additional protrusion 282 protrudes in the opening direction from the downward protrusion 281b of the additional fixing part 281. In this embodiment, the additional protrusion 282 protrudes in the opening direction from the lower end of the downward protrusion 281b. As a result, the additional protrusion 282 is held at a position lower than the second shoe 239.

[0088] The additional protrusion 282 has an additional arm portion 282a and an additional hook portion 282b. The additional arm portion 282a protrudes in the opening direction from the downward protrusion portion 281b. The additional hook portion 282b protrudes upward from the additional arm portion 282a.

[0089] The shape of the additional removal prevention member 28 is the same as the shape of the door-side removal prevention member 26. Therefore, the cross-sectional shape of the additional removal prevention member 28 in a plane perpendicular to the width direction of the threshold groove 25 is the same at any position in the width direction of the threshold groove 25. The orientation of the additional removal prevention member 28 in the width direction of the car entrance 7 is opposite to the orientation of the door-side removal prevention member 26 in the width direction of the car entrance 7.

[0090] As shown in FIG. 1, the landing door device 40 on each floor has a landing door support member 41, a landing threshold 42, and a pair of landing doors 43.

[0091] The landing door support member 41 is disposed above the landing entrance 9. In addition, the landing door support member 41 is fixed to an inner wall surface of the elevator shaft 1. The configuration of the landing door support member 41 is similar to the configuration of the car door support member 21.

[0092] The landing threshold 42 is a threshold fixed to the floor of the landing 8. The landing threshold 42 is provided below the landing entrance 9. The configuration of the landing threshold 42 is similar to the configuration of the car threshold 22.

[0093] The pair of landing doors 43 are hung on the landing door rails of the landing door support member 41. The pair of landing doors 43 are movable along the frontage direction of the landing entrance 9 by being guided by the landing door rails.

[0094] The landing door support member 41 is provided with a landing door interlocking mechanism (not shown). The landing door interlocking mechanism interlocks the pair of landing doors 43 with each other. This allows the pair of landing doors 43 to move in opposite directions to each other along the frontage direction of the landing entrance 9.

[0095] As with the car entrance 7, a vertical line passing through the center of the landing entrance 9 in the frontage direction is set as a landing door fully closed reference line at the landing entrance 9. The pair of landing doors 43 open the landing entrance 9 by moving in a direction away from the landing door fully closed reference line, and close the landing entrance 9 by moving in a direction approaching the landing door fully closed reference line. That is, in this embodiment, the landing door device 40 is a center-opening door device.

[0096] At a floor where the car 6 is stopped, the pair of car doors 23 face the pair of landing doors 43. This allows the pair of landing doors 43 to be interlocked with the pair of car doors 23. Therefore, at a floor where the car 6 is stopped, the pair of car doors 23 move in opposite directions to each other, causing the pair of landing doors 43 to move in opposite directions to each other along the frontage direction of the landing entrance / exit 9. The landing entrance / exit 9 is opened and closed by the pair of landing doors 43 moving in opposite directions to each other along the frontage direction of the landing entrance / exit 9.

[0097] Next, the operation will be described. At a floor where the car 6 is stopped, when the pair of car doors 23 move along the frontage direction of the car entrance 7 by the driving force of the door driving device, the pair of hall doors 43 move along the frontage direction of the hall entrance 9 in conjunction with the movement of the pair of car doors 23. This causes the car entrance 7 and the hall entrance 9 to be opened or closed.

[0098] Each car door 23 moves along the opening direction of the car entrance 7 while maintaining the first guide member 234, the second guide member 235, the door side anti-detachment member 26 and the additional anti-detachment member 28 each inserted into the threshold groove 25.

[0099] When each car door 23 moves in the closing direction, the door-side removal prevention member 26 moves within the threshold groove 25 in a direction approaching the threshold-side removal prevention member 27. When each car door 23 reaches a position where it fully closes the car entrance 7, a part of the door-side protrusion 262 of the door-side removal prevention member 26 is inserted into the space present below the threshold-side protrusion 272 of the threshold-side removal prevention member 27.

[0100] When each car door 23 moves in the opening direction from a state in which the car door 23 fully closes the car entrance 7, the door-side removal prevention member 26 moves in the threshold groove 25 in a direction away from the threshold-side removal prevention member 27. As a result, the door-side protrusion 262 comes out of the space present below the threshold-side protrusion 272.

[0101] When an elevator user enters the space inside the car body 61, the car floor 62 receives a downward load from the user. This causes the car floor 62 to sink downward from the floor reference position relative to the car body 61. At this time, the car sill 22 also sinks relative to the car body 61 together with the car floor 62.

[0102] When the car floor 62 sinks downward from the floor reference position by the limit distance E relative to the car body 61, the car floor 62 reaches the floor lower limit position. At this time, the car sill 22 also sinks by the limit distance E relative to the car body 61. When the car floor 62 reaches the floor lower limit position, downward displacement of the car floor 62 and the car sill 22 relative to the car body 61 is prevented by the stopper members.

[0103] Fig. 7 is an enlarged view showing the position of the car sill 22 with respect to the car door 23 when the car sill 22 in Fig. 3 is recessed by the limit distance E into the car body 61. In Fig. 7, the respective positions of the car sill 22 and the sill-side protrusion 272 when the car sill 22 is recessed by the limit distance E into the car body 61 are shown by two-dot chain lines.

[0104] In a state in which each car door 23 fully closes the car entrance 7, when the car sill 22 sinks into the car body 61, the threshold-side anti-detachment member 27 is displaced downward relative to the door-side anti-detachment member 26. As a result, the threshold-side protrusion 272 is displaced in a direction approaching the door-side protrusion 262 from above. In this case, there is a risk that the threshold-side protrusion 272 will get caught on the door-side protrusion 262 from above. If the threshold-side protrusion 272 gets caught on the door-side protrusion 262, it becomes difficult for each car door 23 to move when it opens the car entrance 7.

[0105] However, because the allowable distance D between the threshold-side protrusion 272 and the door-side protrusion 262 is greater than the restricted distance E, the stopper member prevents the car threshold 22 from displacing downward relative to the car body 61 before the threshold-side protrusion 272 engages with the door-side protrusion 262. As a result, even if the car threshold 22 sinks downward relative to the car body 61, the threshold-side protrusion 272 remains separated from the door-side protrusion 262, and the threshold-side protrusion 272 does not engage with the door-side protrusion 262.

[0106] On the other hand, for example, when an elevator user bumps into the car door 23 and an external force acts on the car door 23, the car door 23 may bend and the lower part of the car door 23 may be lifted up against the car threshold 22. In this case, the first guide member 234 and the second guide member 235 may come off the threshold groove 25 upward.

[0107] When the lower portion of the car door 23 is lifted relative to the car threshold 22, the door-side removal prevention member 26 and the additional removal prevention member 28 are displaced upward relative to the threshold-side removal prevention member 27. As a result, when each car door 23 is in a state in which the car entranceway 7 is fully closed, the door-side protrusion 262 engages with the threshold-side protrusion 272 from below.

[0108] 8 is an enlarged view showing a state in which the door-side protrusion 262 of FIG. 3 is hooked from below on the threshold-side protrusion 272. In a state in which the door-side protrusion 262 is hooked from below on the threshold-side protrusion 272, the lower ends of the first guide member 234 and the second guide member 235 remain in the threshold groove 25. This prevents the first guide member 234 and the second guide member 235 from coming out of the threshold groove 25 upward.

[0109] On the other hand, when the car door 23 is displaced from the position that fully closes the car entrance 7, there is a risk that at least one of the first guide member 234 and the second guide member 235 will come off upward from the threshold groove 25 for some reason.

[0110] Fig. 9 is a cross-sectional view showing a state in which the first guide member 234 in Fig. 4 has displaced upward from the threshold groove 25. The position of the lower end of the door-side anti-fall-out member 26 is lower than the position of the lower end of the first guide member 234. As a result, even if the first guide member 234 displaces upward from the threshold groove 25, the side of the door-side anti-fall-out member 26 engages with the groove first side surface 251, making it easier for the first guide member 234 to return into the threshold groove 25.

[0111] Moreover, the sum of the groove inclination dimension A1 and the first guide inclination dimension B1 is greater than the first offset distance C1. Therefore, when the side surface of the door-side anti-falling member 26 is hooked on the groove first side surface 251, at least a part of the first guide first lower inclined surface 234d overlaps with the groove first upper inclined surface 254 when the car sill 22 is viewed from above. As a result, after the side surface of the door-side anti-falling member 26 is hooked on the groove first side surface 251, the first guide member 234 comes into contact with the car sill 22 at least at any one of the positions of the first guide first lower inclined surface 234d and the groove first upper inclined surface 254.

[0112] Thereafter, the first guide member 234 moves into the threshold groove 25 while being guided by either the groove first upper inclined surface 254 or the first guide first lower inclined surface 234d due to the own weight of the car door 23. Therefore, even if the first guide member 234 moves upward out of the threshold groove 25, the first guide member 234 becomes more likely to return into the threshold groove 25.

[0113] In addition, the position of the bottom end of the additional fall-off prevention member 28 is lower than the position of the bottom end of the second guide member 235. As a result, even if the second guide member 235 falls out of the threshold groove 25 upward, the additional fall-off prevention member 28 hooks onto the first groove side surface 251 of the threshold groove 25, making it easier for the second guide member 235 to return into the threshold groove 25.

[0114] In addition, the sum of the groove inclination dimension A1 and the second guide inclination dimension B2 is greater than the second offset distance C2. Therefore, even if the second guide member 235 moves upward out of the threshold groove 25, the second guide member 235 is guided by either the groove first upper inclined surface 254 or the second guide first lower inclined surface 235d, so that the second guide member 235 can more easily return into the threshold groove 25.

[0115] In such a car door device 20, the threshold-side removal prevention member 27 is fixed within the threshold groove 25, and the door-side removal prevention member 26 is fixed to the lower part of the car door 23. Therefore, the threshold-side removal prevention member 27 can be fixed to the car threshold 22 without making the shape of the car threshold 22 a special shape. This makes it easier to manufacture the car threshold 22, and therefore the car door device 20.

[0116] In addition, the threshold-side coming-off prevention member 27 can be easily fixed to the existing car threshold 22. This makes it possible to easily apply the door coming-off prevention structure 24 to the existing car door device 20.

[0117] Furthermore, when the car door 23 fully closes the car entrance 7, a part of the door-side protrusion 262 of the door-side anti-detachment member 26 is located at a position spaced downward from the threshold-side protrusion 272 of the threshold-side anti-detachment member 27. Therefore, when the car door 23 is raised relative to the car threshold 22, the door-side protrusion 262 can be made to engage with the threshold-side protrusion 272 from below. This makes it possible to prevent the car door 23 from being displaced further upward relative to the car threshold 22, and makes it difficult for the insertion portion 233 of the car door 23 to come out of the threshold groove 25 upward. Therefore, regardless of the depth of the threshold groove 25, it is possible to more reliably prevent the insertion portion 233 of the car door 23 from coming out of the threshold groove 25.

[0118] In addition, a part of the door-side protrusion 262 is spaced downward from the threshold-side protrusion 272. For this reason, a vertical allowable distance D can be secured between the door-side protrusion 262 and the threshold-side protrusion 272. This makes it possible to prevent the threshold-side protrusion 272 from getting caught on the door-side protrusion 262 even if the car threshold 22 sinks into the car body 61 and the threshold-side protrusion 272 approaches the door-side protrusion 262. Therefore, it is possible to prevent the movement of the car door 23 from being hindered by the threshold-side protrusion 272 and the door-side protrusion 262 when the car door 23 opens the car entrance.

[0119] Furthermore, when the car door 23 is in a state where the car entrance 7 is fully closed, the position of the door-side hook portion 262b is closer to the threshold-side fixed portion 271 than the position of the threshold-side hook portion 272b. Therefore, even if the position of the door-side removal prevention member 26 shifts in the opening direction relative to the threshold-side removal prevention member 27 with the door-side protrusion 262 hooked on the threshold-side protrusion 272, the door-side hook portion 262b can be made to hook on the threshold-side hook portion 272b. This makes it possible to more reliably maintain the state where the door-side protrusion 262 is hooked on the threshold-side protrusion 272, and more reliably prevent the insertion portion 233 of the car door 23 from coming off the threshold groove 25.

[0120] In addition, when the door-side anti-falling member 26 is viewed along the width direction of the car entrance 7, the door-side anti-falling member 26 is located within the range of the first shoe 237 in the width direction of the threshold groove 25. Therefore, a space can be secured between the side surface of the door-side anti-falling member 26 and the inner surface of the threshold groove 25. This makes it possible to prevent foreign objects from getting caught between the side surface of the door-side anti-falling member 26 and the inner surface of the threshold groove 25. In addition, it is possible to prevent foreign objects from entering the gap between the side surface of the first shoe 237 and the inner surface of the threshold groove 25 from the space between the side surface of the door-side anti-falling member 26 and the inner surface of the threshold groove 25. Therefore, it is possible to prevent the movement of the car door 23 from being hindered by foreign objects getting caught between each of the door-side anti-falling member 26 and the first shoe 237 and the inner surface of the threshold groove 25.

[0121] In addition, the first guide member 234 and the door-side anti-removal member 26 are fixed to the lower part of the door body 232 by a common fixing bolt 30. This eliminates the need to fix the first guide member 234 and the door-side anti-removal member 26 to the door body 232 by separate bolts, thereby suppressing an increase in the number of parts. In addition, by utilizing the existing fixing bolt 30 that fixes the first guide member 234 to the door body 232, the door-side anti-removal member 26 can be easily fixed to the existing door body 232.

[0122] Moreover, the threshold-side fixing portion 271 is detachable from the car threshold 22. Therefore, the threshold-side deviation prevention member 27 can be easily fixed to the existing car threshold 22. Moreover, if the threshold-side deviation prevention member 27 is damaged, it can be easily replaced.

[0123] In addition, the cross-sectional shape of the threshold-side deviation prevention member 27 in a plane perpendicular to the width direction of the threshold groove 25 is the same at any position in the width direction of the threshold groove 25. Therefore, the threshold-side deviation prevention member 27 can be formed by drawing, and the threshold-side deviation prevention member 27 can be easily manufactured. Furthermore, for the car threshold 22, an aluminum drawing material formed by drawing an aluminum material is often used. Therefore, by matching the shape of the threshold-side deviation prevention member 27 to the shape in which the aluminum drawing material is used, the design of the threshold-side deviation prevention member 27 can be matched to the design of the car threshold 22. This can improve the design of the car threshold 22 to which the threshold-side deviation prevention member 27 is fixed. Note that the materials of the threshold-side deviation prevention member 27 and the threshold 22 are not limited to aluminum.

[0124] In addition, the position of the lower end of the door-side anti-fall-out member 26 is lower than the position of the lower end of the first guide member 234. Therefore, even if the first guide member 234 falls out of the threshold groove 25 upward, the lower end of the door-side anti-fall-out member 26 hooks on the inner surface of the threshold groove 25, making it easier for the first guide member 234 to return into the threshold groove 25.

[0125] In addition, the sum of the groove inclination dimension A1 and the first guide inclination dimension B1 is greater than the first offset distance C1. Therefore, when the lower end of the door-side anti-falling member 26 engages with the groove first side surface 251, the first guide member 234 can be brought into contact with the car sill 22 at a position where at least one of the first guide first lower inclined surface 234d and the groove first upper inclined surface 254 is formed. This makes it easier for the first guide member 234 to return into the threshold groove 25 by the guidance of the first guide member 234 by either the groove first upper inclined surface 254 or the first guide first lower inclined surface 234d.

[0126] In addition, the position of the lower end of the additional fall-off prevention member 28 is lower than the position of the lower end of the second guide member 235. Therefore, even if the second guide member 235 falls out of the threshold groove 25 upward, the lower end of the additional fall-off prevention member 28 hooks on the inner surface of the threshold groove 25, making it easier for the second guide member 235 to return into the threshold groove 25.

[0127] In addition, the sum of the groove inclination dimension A1 and the second guide inclination dimension B2 is greater than the second offset distance C2. Therefore, when the lower end of the additional fall-off prevention member 28 engages with the groove first side surface 251, the second guide member 235 can be brought into contact with the car sill 22 at a position where at least one of the second guide first lower inclined surface 235d and the groove first upper inclined surface 254 is formed. This makes it easier for the second guide member 235 to return into the threshold groove 25 by the guidance of the second guide member 235 by either the groove first upper inclined surface 254 or the second guide first lower inclined surface 235d.

[0128] In addition, when the additional removal prevention member 28 is viewed along the frontage direction of the car entrance 7, the additional removal prevention member 28 is located within the range of the second shoe 239 in the width direction of the threshold groove 25. Therefore, a space can be secured between the side surface of the additional removal prevention member 28 and the inner surface of the threshold groove 25. This makes it possible to prevent foreign matter from getting caught between the side surface of the additional removal prevention member 28 and the inner surface of the threshold groove 25. In addition, it is possible to prevent foreign matter from entering the gap between the side surface of the second shoe 239 and the inner surface of the threshold groove 25 from the space between the side surface of the additional removal prevention member 28 and the inner surface of the threshold groove 25. Therefore, it is possible to prevent the movement of the car door 23 from being hindered by foreign matter getting caught between each of the additional removal prevention member 28 and the second shoe 239 and the inner surface of the threshold groove 25.

[0129] In addition, the second guide member 235 and the additional removal prevention member 28 are fixed to the lower part of the door body 232 by a common fixing bolt 31. This eliminates the need to fix each of the second guide member 235 and the additional removal prevention member 28 to the door body 232 by separate bolts, making it possible to suppress an increase in the number of parts. In addition, by utilizing the existing fixing bolt 31 that fixes the second guide member 235 to the door body 232, the additional removal prevention member 28 can be easily fixed to the existing door body 232.

[0130] In addition, the shape of the additional removal prevention member 28 is the same as the shape of the door-side removal prevention member 26. Therefore, the additional removal prevention member 28 and the door-side removal prevention member 26 can be manufactured by the same manufacturing device, and the manufacturing of the door removal prevention structure 24 can be facilitated.

[0131] In the above embodiment, the threshold-side protrusion 272 has the threshold-side hook 272b, and the door-side protrusion 262 has the door-side hook 262b. However, the threshold-side hook 272b may be omitted. Also, the door-side hook 262b may be omitted.

[0132] In the above embodiment, the threshold-side protrusion 272 protrudes in the opening direction from the upper end of the threshold-side fixing part 271. However, as long as the door-side protrusion 262 can be inserted into a position spaced downward from the threshold-side protrusion 272, the threshold-side protrusion 272 does not have to protrude from the upper end of the threshold-side fixing part 271.

[0133] In the above embodiment, the door-side protrusion 262 protrudes in the closing direction from the lower end of the downward protrusion 261b. However, as long as the door-side protrusion 262 can be inserted into a position spaced downward from the threshold-side protrusion 272, the door-side protrusion 262 does not have to protrude from the lower end of the downward protrusion 261b.

[0134] Furthermore, in the above embodiment, when the car door 23 fully closes the car entrance 7, a part of the door-side protrusion 262 is located at a position spaced downward from the threshold-side protrusion 272. However, when the car door 23 fully closes the car entrance 7, the entire door-side protrusion 262 may be located at a position spaced downward from the threshold-side protrusion 272.

[0135] In the above embodiment, the first guide member 234 and the door-side anti-detachment member 26 are fixed to the lower part of the door main body 232 by a common fixing bolt 30. However, the fastener that fixes the first guide member 234 to the lower part of the door main body 232 and the fastener that fixes the door-side anti-detachment member 26 to the lower part of the door main body 232 may be separate fasteners.

[0136] In the above embodiment, a portion of the door-side anti-detachment member 26 overlaps with the first guide member 234. However, the door-side anti-detachment member 26 may be disposed at a position away from the first guide member 234 in the opening direction of the car entrance 7.

[0137] In the above embodiment, the threshold-side anti-fall-out member 27 is fixed in the threshold groove 25 by a fixing bolt 29 passed through a bolt-through hole 221 that reaches from the groove bottom surface 253 to the underside of the car threshold 22. However, the threshold-side anti-fall-out member 27 may also be fixed in the threshold groove 25 by a fastener passed through a bolt-through hole that reaches from the groove first side surface 251 to the side surface of the car threshold 22, for example.

[0138] In the above embodiment, the position of the lower end of the door-side anti-detachment member 26 is lower than the position of the lower end of the first guide member 234. However, this is not limited to this. For example, the position of the lower end of the door-side anti-detachment member 26 may be higher than the position of the lower end of the first guide member 234. Also, the position of the lower end of the door-side anti-detachment member 26 may be at the same height as the position of the lower end of the first guide member 234.

[0139] In the above embodiment, the shape of the additional removal-preventing member 28 is the same as the shape of the door-side removal-preventing member 26. However, the shape of the additional removal-preventing member 28 may be different from the shape of the door-side removal-preventing member 26. Therefore, the additional protrusion 282 may not be provided.

[0140] In the above embodiment, the second guide member 235 and the additional removal prevention member 28 are fixed to the lower part of the door main body 232 by a common fixing bolt 31. However, the fastener that fixes the second guide member 235 to the lower part of the door main body 232 and the fastener that fixes the additional removal prevention member 28 to the lower part of the door main body 232 may be separate fasteners.

[0141] In the above embodiment, a portion of the additional removal prevention member 28 overlaps with the second guide member 235. However, the additional removal prevention member 28 may be disposed at a position away from the second guide member 235 in the entrance direction of the car entrance 7.

[0142] In the above embodiment, the additional removal prevention member 28 is fixed to the lower part of the door main body 232. However, the additional removal prevention member 28 may be omitted.

[0143] In the above embodiment, the door removal prevention structure 24 is applied to the center-opening car door device 20. However, the door removal prevention structure 24 may be applied to a single-opening car door device in which a plurality of car doors 23 move in the same direction to open and close the car entrance 7.

[0144] In the above embodiment, the door removal prevention structure 24 is applied to the car door device 20. However, the door removal prevention structure 24 may be applied to the landing door device 40. In this case, the door-side removal prevention member 26 and the additional removal prevention member 28 are fixed to the landing door 43, and the threshold-side removal prevention member 27 is fixed in the threshold groove of the landing threshold 42. In this case, since the landing threshold 42 does not sink into the landing door 43, the allowable distance D between the threshold-side protrusion 272 and the door-side protrusion 262 can be made smaller than when the door removal prevention structure 24 is applied to the car door device 20. In this case, the landing door device 40 may be a one-way swing-type landing door device to which the door removal prevention structure 24 is applied. [Explanation of symbols]

[0145] 7 car entrance (elevator entrance), 9 landing entrance (elevator entrance), 20 car door device (elevator door device), 22 car sill (sill), 23 car door (door), 24 door removal prevention structure, 25 sill groove, 26 door side removal prevention member, 27 sill side removal prevention member, 28 additional removal prevention member, 30 fixing bolt (fastener), 31 fixing bolt (fastener), 40 landing door device (elevator door device), 42 landing sill (sill), 43 landing door (door), 223 sill first upper surface (sill upper surface), 232 door main body, 233 insertion portion, 234 first guide member, 234a first guide first side surface, 234c first guide lower surface, 234d first guide first lower inclined surface, 235 Second guide member, 235a second guide first side surface, 235c second guide lower surface, 235d second guide first lower inclined surface, 237 first shoe, 239 second shoe, 251 groove first side surface, 252 groove second side surface, 254 groove first upper inclined surface, 261 door side fixing portion, 262 door side protruding portion, 262a door side arm portion, 262b door side hook portion, 271 threshold side fixing portion, 272 threshold side protruding portion, 272a threshold side arm portion, 272b threshold side hook portion.

Claims

1. A threshold provided at a lower portion of the elevator entrance and having a threshold groove provided along a frontage direction of the elevator entrance; a door that moves along a frontage direction of the elevator entrance to open and close the elevator entrance; Door removal prevention structure and Equipped with The door has a door body and an insertion portion provided at a lower portion of the door body, The insertion portion has a first guide member inserted into the threshold groove, The door removal prevention structure includes a threshold side removal prevention member and a door side removal prevention member, The threshold side anti-slip member has a threshold side fixing part fixed in the threshold groove and a threshold side protruding part protruding from the threshold side fixing part in an opening direction which is a direction in which the door moves when the door opens the elevator entrance, the door-side anti-detachment member has a door-side fixed part fixed to a lower part of the door body, and a door-side protruding part protruding from the door-side fixed part in a closing direction which is a moving direction of the door when the door closes the elevator entrance, When the door is fully closing the elevator entrance, at least a part of the door-side protrusion is located in the threshold groove at a position spaced downward from the threshold-side protrusion, The threshold-side protruding portion has a threshold-side arm portion protruding in the opening direction from the threshold-side fixing portion and a threshold-side hook portion protruding downward from the threshold-side arm portion, the door-side protruding portion has a door-side arm portion protruding from the door-side fixing portion in the closing direction and a door-side hook portion protruding upward from the door-side arm portion, An elevator door device in which, when the door is fully closing the elevator entrance, the position of the door-side hook portion is closer to the threshold-side fixed portion than the position of the threshold-side hook portion.

2. A threshold provided at a lower portion of the elevator entrance and having a threshold groove provided along a frontage direction of the elevator entrance; a door that moves along a frontage direction of the elevator entrance to open and close the elevator entrance; Door removal prevention structure and Equipped with The door has a door body and an insertion portion provided at a lower portion of the door body, The insertion portion has a first guide member inserted into the threshold groove, The door removal prevention structure includes a threshold side removal prevention member and a door side removal prevention member, The threshold side anti-slip member has a threshold side fixing part fixed in the threshold groove and a threshold side protruding part protruding from the threshold side fixing part in an opening direction which is a direction in which the door moves when the door opens the elevator entrance, the door-side anti-detachment member has a door-side fixed part fixed to a lower part of the door body, and a door-side protruding part protruding from the door-side fixed part in a closing direction which is a moving direction of the door when the door closes the elevator entrance, When the door is fully closing the elevator entrance, at least a part of the door-side protrusion is located in the threshold groove at a position spaced downward from the threshold-side protrusion, The first guide member has a first shoe positioned in the threshold groove, and a dimension of the first shoe in a width direction of the threshold groove is larger than a dimension of the door-side slippage prevention member in the width direction of the threshold groove, An elevator door device in which, when the door side anti-slip member is viewed along the width direction of the elevator entrance, the door side anti-slip member is positioned within the range of the first shoe in the width direction of the threshold groove.

3. A threshold provided at a lower portion of the elevator entrance and having a threshold groove provided along a frontage direction of the elevator entrance; a door that moves along a frontage direction of the elevator entrance to open and close the elevator entrance; Door removal prevention structure Equipped with The door has a door body and an insertion portion provided at a lower portion of the door body, The insertion portion has a first guide member inserted into the threshold groove, The door removal prevention structure includes a threshold side removal prevention member and a door side removal prevention member, The threshold side anti-slip member has a threshold side fixing part fixed in the threshold groove and a threshold side protruding part protruding from the threshold side fixing part in an opening direction which is a direction in which the door moves when the door opens the elevator entrance, the door-side anti-detachment member has a door-side fixed part fixed to a lower part of the door body, and a door-side protruding part protruding from the door-side fixed part in a closing direction which is a moving direction of the door when the door closes the elevator entrance, When the door is fully closing the elevator entrance, at least a part of the door-side protrusion is located in the threshold groove at a position spaced downward from the threshold-side protrusion, The position of the lower end of the door-side anti-detachment member is lower than the position of the lower end of the first guide member, The inner surface of the threshold groove has a first groove side surface and a second groove side surface opposed to each other in a width direction of the threshold groove, The outer surface of the first guide member has a first guide first side surface facing the groove first side surface and a first guide lower surface facing downward, A groove first upper inclined surface is formed between the upper surface of the sill and the first groove side surface, the groove first upper inclined surface being inclined downward from the upper surface of the sill toward the first groove side surface, a first guide first lower inclined surface is formed between the first guide first side surface and the first guide lower surface, the first guide first lower inclined surface being inclined upward from the first guide lower surface toward the first guide first side surface, An elevator door device in which the sum of the dimensions of the groove first upper inclined surface and the first guide first lower inclined surface in the width direction of the threshold groove is greater than the distance between the door side anti-slip member and the first guide first side surface in the width direction of the threshold groove.

4. A threshold provided at a lower portion of the elevator entrance and having a threshold groove provided along a frontage direction of the elevator entrance; a door that moves along a frontage direction of the elevator entrance to open and close the elevator entrance; Door removal prevention structure and Equipped with The door has a door body and an insertion portion provided at a lower portion of the door body, The insertion portion has a first guide member inserted into the threshold groove, The door removal prevention structure includes a threshold side removal prevention member and a door side removal prevention member, The threshold side anti-slip member has a threshold side fixing part fixed in the threshold groove and a threshold side protruding part protruding from the threshold side fixing part in an opening direction which is a direction in which the door moves when the door opens the elevator entrance, the door-side anti-detachment member has a door-side fixed part fixed to a lower part of the door body, and a door-side protruding part protruding from the door-side fixed part in a closing direction which is a moving direction of the door when the door closes the elevator entrance, When the door is fully closing the elevator entrance, at least a part of the door-side protrusion is located in the threshold groove at a position spaced downward from the threshold-side protrusion, An additional anti-detachment member fixed to the bottom of the door Equipped with The insertion portion has a second guide member inserted into the threshold groove, The position of the second guide member is spaced apart from the position of the first guide member in the opening direction, The position of the additional removal prevention member is spaced apart from the position of the door side removal prevention member in the opening direction, The additional removal prevention member is inserted into the threshold groove, An elevator door device, wherein a lower end portion of the additional anti-detachment member is positioned lower than a lower end portion of the second guide member.

5. The inner surface of the threshold groove has a first groove side surface and a second groove side surface opposed to each other in a width direction of the threshold groove, The outer surface of the second guide member has a second guide first side surface facing the groove first side surface and a second guide lower surface facing downward, A groove first upper inclined surface is formed between the upper surface of the sill and the first groove side surface, the groove first upper inclined surface being inclined downward from the upper surface of the sill toward the first groove side surface, a second guide first lower inclined surface is formed between the second guide first side surface and the second guide lower surface, the second guide first lower inclined surface being inclined upward from the second guide lower surface toward the second guide first side surface, The elevator door device of claim 4, wherein the sum of the respective dimensions of the groove first upper inclined surface and the second guide first lower inclined surface in the width direction of the threshold groove is greater than the distance between the additional anti-detachment member and the second guide first side surface in the width direction of the threshold groove.

6. The second guide member has a second shoe positioned within the threshold groove, The dimension of the second shoe in the width direction of the threshold groove is greater than the dimension of the additional removal prevention member in the width direction of the threshold groove, An elevator door device as described in claim 4 or claim 5, wherein when the additional anti-removal member is viewed along the width direction of the elevator entrance, the additional anti-removal member is positioned within the range of the second shoe in the width direction of the threshold groove.

7. The elevator door device according to any one of claims 4 to 6, wherein the second guide member and the additional anti-detachment member are fixed to the lower part of the door body by a common fastener.

8. The elevator door device according to any one of claims 4 to 7, wherein the shape of the additional anti-detachment member is the same as the shape of the door-side anti-detachment member.

9. The elevator door device according to any one of claims 1 to 8, wherein the position of the lower end of the door side anti-detachment member is lower than the position of the lower end of the first guide member.

10. The elevator door device according to any one of claims 1 to 9, wherein the first guide member and the door side anti-detachment member are fixed to the lower part of the door body by a common fastener.

11. The elevator door device according to any one of claims 1 to 10, wherein the threshold side fixing portion is detachable from the threshold.

12. An elevator door device as described in any one of claims 1 to 11, wherein the cross-sectional shape of the threshold side anti-slip member in a plane perpendicular to the width direction of the threshold groove is the same at any position in the width direction of the threshold groove.

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