Landing door and elevator

Abstract

To provide a landing door that is able to improve the safety in ascending / descending operation of a worker working in a pit, and to provide an elevator including the landing door.SOLUTION: A landing door 211 includes: a door body 211A, 211B horizontally sliding to open and close an entrance communicating with a hoistway; and an ascent / descent assisting portion 216A, 216B disposed on a surface of the door body 211A, 211B on a hoistway side. The ascent / descent assisting portion 216A, 216B includes: a plurality of horizontal crosspieces 241 arranged in a vertical direction; and a handrail 242 extending in the vertical direction and fixed to the plurality of horizontal crosspieces 241. The handrail 242 is fixed at a position with a space left in the horizontal direction from end parts of the plurality of horizontal crosspieces 241.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a landing door and an elevator. [Background technology]

[0002] When performing maintenance and inspection work on an elevator, a maintenance worker may descend into the pit from the landing on the lowest floor. In that case, the maintenance worker uses a pit ascending ladder. An example of a pit ascending ladder is disclosed in Patent Document 1.

[0003] The pit ascent ladder disclosed in Patent Document 1 comprises a ladder section, a handrail section, and a door fixing means. The handrail section is fixed to the inner surface of the elevator door on the hoistway side. The handrail section moves together with the elevator door. The ladder section is fixed to the side surface inside the pit. The ladder section is located below the handrail section when the elevator door is open. The door fixing means fixes the elevator door in the open position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-051348 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the height of the handhold of the pit climbing ladder disclosed in Patent Document 1 is limited to the height of the horizontal bar. Therefore, with the pit climbing ladder disclosed in Patent Document 1, the worker's posture may become unstable when changing the horizontal bar.

[0006] In consideration of the above problems, the object of the present invention is to provide a landing door that can improve the safety of the ascent and descent actions of workers working in the pit, and an elevator equipped with such a landing door. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the object of the present invention, a landing door reflecting one aspect of the present invention includes a door body that slides horizontally to open and close an entrance communicating with an elevator shaft, and a lift assist part arranged on the surface of the door body facing the elevator shaft. The lift assist part has a plurality of horizontal bars aligned in the vertical direction, and handrails extending in the vertical direction and fixed to the plurality of horizontal bars. The handrails are fixed at a position spaced horizontally from the ends of the plurality of horizontal bars.

[0008] An elevator embodying one aspect of the present invention includes a car that moves up and down within a hoistway, and the hall door that opens and closes an entrance communicating with the hoistway. Effect of the Invention

[0009] The landing door of the above configuration can improve the safety of workers working in the pit when ascending and descending. Problems, configurations and effects other than those described above will become apparent from the following description of the embodiments. [Brief description of the drawings]

[0010] [Figure 1] 1 is an overall configuration diagram of an elevator according to one embodiment of the present invention. [Diagram 2] 1 is a side view showing a state in which an elevator car according to an embodiment of the present invention has stopped at an arbitrary floor. [Diagram 3] FIG. 2 is a view from the elevator shaft side showing a state in which the hall door according to one embodiment of the present invention is located on the lowest floor. [Figure 4] FIG. 4 is a cross-sectional view taken along the line AA shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, a hall door and an elevator according to an embodiment of the present invention will be described. Note that the same reference numerals are used to designate the same components in each drawing.

[0012] 1. One embodiment [Elevator] First, the configuration of an elevator according to one embodiment of the present invention will be described with reference to Figs. 1 and 2. Fig. 1 is a diagram showing the overall configuration of an elevator according to an embodiment of the present invention, and Fig. 2 is a side view showing a state in which the elevator car stops at an arbitrary floor.

[0013] As shown in Fig. 1, elevator 1 is installed in a hoistway 110 formed in a building structure. Elevator 1 includes a car 120 for carrying passengers and luggage, a main rope 130, a counterweight 140, a hoisting machine 100, and a hall door 211 (see Fig. 2). A machine room 160 is provided at the top of hoistway 110.

[0014] The hoisting machine 100 is disposed in a machine room 160. A main rope 130 is wound around the hoisting machine 100. The hoisting machine 100 is a device that winds up the main rope 130 to raise and lower the car 120. A deflection sheave 150 is provided in the vicinity of the hoisting machine 100. The main rope 130 is mounted on the deflection sheave 150.

[0015] The car 120 is formed in a hollow, approximately rectangular parallelepiped shape. The car 120 is connected to a counterweight 140 via a main rope 130. The hoist 100 raises and lowers the car 120 and the counterweight 140 in a bucket-like manner via the main rope 130. The drive of the hoist 100 is controlled by a control unit (not shown).

[0016] As shown in FIG. 2, the elevator car 120 has a car chamber 10 where people and objects get on and off, and a car door 11.

[0017] An opening that is opened and closed by a car door 11 is formed on one side of the car chamber 10. People and objects enter and exit the passenger car 120 through the opening of the car chamber 10. The car-side door unit 12 is disposed at the upper end in the vertical direction of the opening of the car chamber 10. The car-side door sill 13 is disposed at the lower end in the vertical direction of the opening of the car chamber 10.

[0018] The car door 11 is a double-hinged door and includes a pair of car door bodies 11A and 11B, a car side door unit 12, and a car side door sill 13.

[0019] The pair of car door bodies 11A, 11B are each formed in a rectangular shape that is long in the vertical direction. A slider (not shown) is provided at the lower end portion in the vertical direction of the pair of car door bodies 11A, 11B. The slider slidably engages with a sill groove provided in the car side door sill 13. The car side door unit 12 and the car side door sill 13 support the pair of car door bodies 11A, 11B so that they can slide in the horizontal direction perpendicular to the vertical direction.

[0020] The car-side door unit 12 has a car-side door rail 15, a pair of door hangers 21A, 21B, an endless transmission belt (not shown), and a drive unit (not shown) that circulates the transmission belt. The car-side door rail 15 extends along the sliding direction of the pair of car door bodies 11A, 11B.

[0021] The door hanger 21A is attached to the upper end of the car door main body 11A in the vertical direction. The door hanger 21B is attached to the upper end of the car door main body 11B in the vertical direction. A moving roller 24 is rotatably supported on each of the pair of door hangers 21A, 21B. The moving roller 24 slidably engages with the car side door rail 15.

[0022] The pair of door hangers 21A, 21B are connected to a transmission belt. When the drive unit circulates the transmission belt, the pair of car door bodies 11A, 11B move toward each other in a door-opening direction or away from each other in a door-closing direction via the pair of door hangers 21A, 21B.

[0023] The car door main body 11A has a car-side locking mechanism 30. The car-side locking mechanism 30 locks the movement of the car door main body 11A in the door-opening direction. The car-side locking mechanism 30 maintains the pair of car door main bodies 11A, 11B in a closed state. In addition, the car-side locking mechanism 30 engages with a hall-side locking mechanism 230 of the hall door 211, which will be described later.

[0024] The building structure includes a landing 101 where a car 120 stops on each floor. A doorway 102 communicating with an elevator shaft 110 is formed in the landing 101. People and objects enter and exit the car 120 through the doorway 102. A landing door 211 is disposed in the doorway 102. The landing door 211 opens and closes the doorway 102.

[0025] The landing door 211 has a pair of landing door main bodies 211A, 211B, a landing side door unit 212, and a landing side door sill 213. The landing side door unit 212 is disposed at the upper end in the vertical direction of the entrance / exit 102. The landing side door sill 213 is disposed at the lower end in the vertical direction of the entrance / exit 102. The landing side door unit 212 and the landing side door sill 213 support the pair of landing door main bodies 211A, 211B so that they can slide horizontally.

[0026] The landing door 211 is a double-leaf door. A pair of landing door bodies 211A, 211B of the landing door 211 are each formed in a rectangular shape that is long in the vertical direction. A slider (not shown) is provided at the lower end in the vertical direction of the pair of landing door bodies 211A, 211B. The slider slidably engages with a sill groove provided in the landing side door sill 213. The pair of landing door bodies 211A, 211B are movably supported by the landing side door unit 212 and the landing side door sill 213.

[0027] The landing side door unit 212 has a landing side door rail 215, a pair of door hangers 221A, 221B, a landing side lock mechanism 230, and an endless transmission belt (not shown). The landing side door rail 215 extends along the sliding direction of the pair of landing door bodies 211A, 211B.

[0028] The door hanger 221A is attached to the upper end of the landing door main body 211A in the vertical direction. The door hanger 221B is attached to the upper end of the landing door main body 211B in the vertical direction. A moving roller 224 is rotatably supported on each of the pair of door hangers 221A and 221B. The moving roller 224 slidably engages with the landing side door rail 215.

[0029] The pair of landing door bodies 211A, 211B are connected to a transmission belt. When the transmission belt moves in a circular motion, the pair of landing door bodies 211A, 211B move in a door-opening direction in which they approach each other, or in a door-closing direction in which they move away from each other, via the pair of door hangers 221A, 221B.

[0030] The landing side locking mechanism 230 is provided on the door hanger 221A. The landing side locking mechanism 230 locks the movement of the pair of landing door main bodies 211A and 211B in the door opening direction. The landing side locking mechanism 230 maintains the pair of landing door main bodies 211A and 211B in a closed state.

[0031] When the car 120 stops at any floor, the car-side locking mechanism 30 engages with the hall-side locking mechanism 230. Next, a drive unit (not shown) of the car-side door unit 12 is driven, and the pair of car door bodies 11A, 11B move in the door-opening direction away from each other. At this time, the car-side locking mechanism 30 and the hall-side locking mechanism 230 unlock the car-side locking mechanism 30.

[0032] When the car door main body 11A moves further in the door-opening direction, the car-side locking mechanism 30 unlocks the landing-side locking mechanism 230. As a result, the pair of landing door main bodies 211A, 211B move in the door-opening direction together with the pair of car door main bodies 11A, 11B. Thereafter, the door-opening operation of the pair of car door main bodies 11A, 11B and the pair of landing door main bodies 211A, 211B is completed.

[0033] [Landing door configuration] Next, the configuration of the hall door 211 will be described with reference to FIGS. Fig. 3 is a view showing a state in which the landing door 211 is located at the lowest floor, as viewed from the elevator shaft 110. Fig. 4 is a cross-sectional view taken along the line AA shown in Fig. 3.

[0034] As shown in FIG. 3, the landing door 211 has a pair of landing door main bodies 211A, 211B, and lifting assistance parts 216A, 216B attached to the pair of landing door main bodies 211A, 211B, respectively.

[0035] The pair of landing door bodies 211A, 211B are formed symmetrically. Hereinafter, the door opening direction of the pair of landing door bodies 211A, 211B is referred to as the door pocket side, and the door closing direction of the pair of landing door bodies 211A, 211B is referred to as the door stop side. The pair of landing door bodies 211A, 211B have a door panel 231 and a vertical reinforcement 232.

[0036] The door panel 231 is formed in a rectangular shape that is long in the vertical direction. The door panel 231 has a door stop side end 235, a door pocket side end 236, a lower end 237, and an upper end (not shown). The door stop side end 235, the door pocket side end 236, the lower end 237, and the upper end are bent into a substantially C-shape. When the landing door 211 is in a door-closed state, the door stop side end 235 of the landing door main body 211A abuts against the door stop side end 235 of the landing door main body 211B.

[0037] The vertical reinforcement 232 is disposed between a door stop side end 235 and a door pocket side end 236 of the door panel 231. The vertical reinforcement 232 is fixed to the flat surface of the door panel 231 on the hoistway side by using screws or welding. The vertical reinforcement 232 is formed into an elongated shape that is long in the vertical direction by bending a metal plate.

[0038] The vertical reinforcement 232 has a joint piece 232A, a pair of rising pieces 232B, and a pair of opposing pieces 232C. The joint piece 232A is formed as a rectangular plate that is long in the vertical direction. One flat surface of the joint piece 232A is joined to the flat surface of the door panel 231 on the hoistway side.

[0039] The pair of rising pieces 232B protrude approximately perpendicularly from the long side of the joint piece 232A. The pair of rising pieces 232B are formed as rectangular plates that are long in the vertical direction. The planes of the pair of rising pieces 232B are approximately perpendicular to the direction in which the landing door 211 slides. The pair of opposing pieces 232C protrude approximately perpendicularly from the pair of rising pieces 232B. The pair of opposing pieces 232C are formed as rectangular plates that are long in the vertical direction. One plane of the pair of opposing pieces 232C faces the plane of the door panel 231 on the hoistway side.

[0040] The lifting and lowering auxiliary parts 216A, 216B have a plurality of horizontal bars 241 and a handrail 242. The multiple horizontal bars 241 are arranged vertically at predetermined intervals. The multiple horizontal bars 241 are made of plates that are long in the direction in which the landing door 211 slides. One end of each of the multiple horizontal bars 241 in the longitudinal direction is fixed to the doorstop side end 235 of the door panel 231 by using screws or welding. The other end of each of the multiple horizontal bars 241 in the longitudinal direction is fixed to the opposing piece 232C of the vertical reinforcement 232 by using screws or welding.

[0041] The handrail 242 is made of a rectangular plate that is long in the vertical direction. The middle part of the handrail 242 in the vertical direction is fixed to the multiple horizontal bars 241 by using screws or welding. In other words, the handrail 242 is fixed at a position that is horizontally spaced from the ends of the multiple horizontal bars 241. The lower end part of the handrail 242 in the vertical direction is fixed to the lower end part 237 of the door panel 231 by using screws or welding.

[0042] A worker opens a pair of hall door bodies 211A, 211B to enter and exit the pit of the hoistway 110. A ladder 250 is fixed to the side of the inside of the pit in the hoistway 110. As shown in Fig. 3, the ladder 250 has a plurality of rungs 251 aligned in the vertical direction. The position where the ladder 250 is fixed is determined appropriately depending on the size of the hoistway 110 and the type of elevator.

[0043] When entering or exiting the pit, the worker ascends or descends the multiple rungs 251 of the ladder 250 while holding onto the rails 242. When entering or exiting the pit, the worker also hangs a safety belt hook he or she is carrying on one of the multiple rungs 241 and ascends or descends the ladder 250. The safety belt hook corresponds to the predetermined hook according to the present invention.

[0044] The handrail 242 has four corners that are rounded. This makes it easier for workers to grip the handrail 242 and prevents them from hurting their hands when gripping the handrail 242. Instead of rounding the corners of the handrail 242, cushioning material or rubber material may be wrapped around the handrail 242.

[0045] In the direction in which the landing door 211 slides, the distance between the handrail 242 and the doorstop side end 235 of the door panel 231 is shorter than the distance between the handrail 242 and the vertical reinforcement 232. As a result, the handrail 242 is disposed at the opening side end of the pair of landing door bodies 211A, 211B.

[0046] The distance between the handrail 242 and the doorstop side end 235 of the door panel 231 is set to a length (e.g., 25 mm) that allows an operator's fingers to reach in and grasp the handrail 242. In other words, the handrail 242 is disposed close to the doorstop side end 235 of the door panel 231.

[0047] The portions of the multiple horizontal bars 241 located between the handrail 242 and the doorstop side end 235 of the door panel 231 are referred to as first intermediate portions 241a. The portions of the multiple horizontal bars 241 located between the handrail 242 and the vertical reinforcement 232 are referred to as second intermediate portions 241b. The first intermediate portions 241a of the multiple horizontal bars 241 are set to be wider than the second intermediate portions 241b of the multiple horizontal bars 241. This makes it possible to uniquely determine the posture of the multiple horizontal bars 241.

[0048] The width of the first intermediate portion 241a is set to a length that does not allow a safety belt hook carried by a worker to be hung on it. On the other hand, the width of the second intermediate portion 241b is set to a length that allows a safety belt hook carried by a worker to be hung on it. Therefore, the worker hangs the safety belt hook on the second intermediate portion 241b of the multiple horizontal rails 241.

[0049] Since the handrail 242 is disposed close to the doorstop side end 235 of the door panel 231, the length of the first intermediate portion 241a in the direction in which the landing door 211 slides is relatively short. Therefore, if a safety belt hook is hung on the first intermediate portion 241a, when the safety belt hook is pulled, the safety belt hook interferes with the vertical reinforcement 232 and the doorstop side end 235 and is fixed in an oblique state. As a result, the safety belt hook cannot be used correctly.

[0050] In this embodiment, the width of the first intermediate portion 241a is set to a length that prevents a safety belt hook from being hung on it. This prevents a worker from erroneously hanging a safety belt hook on the first intermediate portion 241a. As a result, it is possible to prevent a worker from ascending or descending the multiple rungs 251 of the ladder 250 without being able to use the safety belt hook correctly. This improves safety when a worker enters or exits the pit of the hoistway 110.

[0051] The above-mentioned predetermined interval between the multiple rungs 241 is set to the same length as the vertical interval between the multiple rungs 251 of the ladder 250. This allows the worker to change the safety belt hook to the second intermediate part 241b of the next lower rung every time he descends one rung 251. As a result, the timing of the safety belt hook change operation can be unified, improving the safety when the worker enters and exits the pit of the hoistway 110.

[0052] The lifting and lowering auxiliary parts 216A, 216B configured in this way have handrails 242 that extend in the vertical direction. This means that the height position that a worker entering or exiting the pit can grasp with his or her hand is not limited. As a result, the safety of the lifting and lowering action of workers working in the pit can be improved. The lower end of the handrail 242 is fixed to the lower end 237 of the door panel 231. This allows the handrail 242 to be firmly fixed to the pair of landing door bodies 211A, 211B.

[0053] The handrail 242 is fixed to the middle of the multiple horizontal rails 241 on which the safety belt hooks are hung. This increases the rigidity of the multiple horizontal rails 241. As a result, deformation of the multiple horizontal rails 241 can be suppressed when force is applied to the multiple horizontal rails 241 via the safety belt hooks.

[0054] The pair of landing door bodies 211A, 211B have vertical reinforcements 232. This can increase the strength of the pair of landing door bodies 211A, 211B. The multiple horizontal bars 241 are fixed to the door stop side end portion 235 and the vertical reinforcements 232. This can shorten the length of the multiple horizontal bars 241 in the direction in which the landing door 211 slides. This can increase the rigidity of the multiple horizontal bars 241.

[0055] The handrail 242 is disposed at the end of the opening side of the pair of landing door bodies 211A, 211B. This allows the handrail 242 to be disposed close to the workers entering and exiting the pit. In addition, by changing the opening width of the pair of landing door bodies 211A, 211B, the position of the handrail 242 can be changed according to the position of the ladder 250.

[0056] One end of each of the horizontal bars 241 in the longitudinal direction is set to the same width as the first intermediate portion 241a. This increases the fixing margin of the horizontal bars 241 relative to the door stop side end 235. As a result, the horizontal bars 241 can be firmly fixed to the door stop side end 235.

[0057] The above describes the embodiments of the landing door and elevator of the present invention, including their effects. However, the landing door and elevator of the present invention are not limited to the above-mentioned embodiments, and various modifications are possible within the scope of the gist of the invention described in the claims. In addition, the above-mentioned embodiments are described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all of the described configurations.

[0058] In the embodiment described above, the lifting assistance parts 216A, 216B are provided on the double-leaf landing door 211. However, the landing door according to the present invention may have a single-leaf structure. In the embodiment described above, the handrail 242 is formed in a rectangular plate shape. However, the handrail according to the present invention is not limited to a plate shape, and may be formed in a square pillar shape or a round bar shape, for example. However, when the handrail is formed in a square pillar shape or a round bar shape, it is preferable to fix it to the surface of the multiple horizontal rails 241 that faces the door panel 231. This can prevent the handrail from interfering with the car. [Explanation of symbols]

[0059] 1...elevator, 10...cab, 11...cab door, 11A, 11B...cab door body, 12...cab side door unit, 13...cab side door sill, 15...cab side door rail, 21A, 21B...door hanger, 24...moving roller, 30...cab side lock mechanism, 100...hoisting machine, 101...landing, 102...entrance, 110...hoistway, 130...main rope, 150...deflector, 160...machine room, 211...landing door, 211A, 211B...landing door body, 212...landing side door unit, 213...landing side door sill, 215...landing side door rail, 216A, 216B...lifting auxiliary part, 221A, 221B...door hanger, 224...moving roller, 230...landing side lock mechanism, 231...door panel, 232...vertical reinforcement, 232A...joint piece, 232B...rising piece, 232C...facing piece, 235...doorstop side end, 236...door pocket side end, 237...lower end, 241...horizontal bar, 241a...first intermediate portion, 241b...second intermediate portion, 242...handrail, 250...ladder, 251...step

Claims

1. a door body that slides horizontally to open and close an entrance communicating with the elevator shaft; a lifting auxiliary part disposed on a surface of the door body on the elevator shaft side, The lifting assistance portion includes a plurality of horizontal bars arranged in the vertical direction, and a handrail extending in the vertical direction and fixed to the plurality of horizontal bars, The handrail is fixed at a position spaced apart from the ends of the horizontal rails in the horizontal direction. Landing door.

2. The door body has a vertical reinforcement extending in the vertical direction, The horizontal bars are fixed to the door stop side end of the door body and to the vertical reinforcement. The landing door according to claim 1.

3. The horizontal distance between the handrail and the door stop side end of the door body is shorter than the horizontal distance between the handrail and the vertical reinforcement. The landing door according to claim 2.

4. A first intermediate portion located between the handrail and the door stop side end of the door body in the plurality of horizontal bars is set to be wider than a second intermediate portion located between the handrail and the vertical reinforcement in the plurality of horizontal bars. The landing door according to claim 3.

5. The width of the first intermediate portion of the plurality of horizontal bars is set to a length that does not allow a predetermined hook held by a worker to be hung thereon, The width of the second intermediate portion of the plurality of horizontal bars is set to a length that allows the predetermined hook to be hung. The landing door according to claim 4.

6. The handrail is disposed at a distance between the door stop side end of the door body and the handrail so that the handrail can be grasped by the fingers. The landing door according to claim 1.

7. The lower end of the handrail is fixed to the lower end of the door body. The landing door according to claim 1.

8. The rungs are spaced at the same intervals as the rungs of a ladder fixed to the side of the pit. The landing door according to claim 1.

9. The elevator comprises a car that moves up and down within a hoistway, and a landing door that opens and closes an entrance communicating with the hoistway, The landing door is A door body that slides horizontally; a lifting auxiliary part disposed on a surface of the door body on the elevator shaft side, The lifting assistance portion includes a plurality of horizontal bars arranged in the vertical direction, and a handrail extending in the vertical direction and fixed to the plurality of horizontal bars, The handrail is fixed at a position spaced apart from the ends of the horizontal rails in the horizontal direction. Elevator.

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