WO2023195124A1

WO2023195124A1 - Elevator door device and elevator

Info

Publication number: WO2023195124A1
Application number: PCT/JP2022/017249
Authority: WO
Inventors: 康平今村; 真介石塚
Original assignee: 株式会社日立製作所
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2023-10-12

Abstract

The present invention comprises: a lock lever including an engagement claw; and a fixed hook part including an engagement piece engageable with the engagement claw. In engagement of the engagement claw and engagement piece, the shape of the one side engagement surface located on the engagement claw side of the engagement piece as viewed in the direction along the axial direction of the pivot axis is configured to be the same as the pivot trajectory of the peak part located nearest the pivot axis of the engagement claw.

Description

Elevator door device and elevator

The present invention relates to an elevator door device and an elevator.

Conventionally, in an elevator, a door lock mechanism is provided for each of the hall door provided on the landing side and the car door provided on the car side to lock and release the opening/closing operation of the door.

For example, the door lock mechanism on the landing door side is composed of a fixed hook member fixed on the hoistway side, and a lock lever provided on the landing door side and pivoted toward the fixed hook member side. The fixed hook member has a hook portion that engages with the lock lever at the end on the lock lever side. The hook portion has a vertical engagement surface that extends perpendicularly to the horizontal surface, and when the engagement claw provided at the tip of the lock lever engages with this engagement surface, the door opens and closes. can be locked.

Conventionally, in the above-mentioned door lock mechanism, when the door is locked, a gap is provided between the engaging surface of the hook part of the fixed hook member and the engaging pawl of the lock lever, so that the engaging pawl and the engaging pawl do not engage with each other during the unlocking operation. The structure was such that it did not interfere with the mating surface. In such a structure, if the gap between the engaging surface and the engaging pawl becomes smaller than expected due to foreign objects or external factors, the engaging surface and the engaging pawl may interfere with each other during the unlocking operation. There is a risk that the lock may become unopenable.

On the other hand, in Patent Document 1, in an interlock mechanism composed of a fixed hook and a lock lever, the shape of at least one of the engaging surface of the fixed hook or the engaging surface of the engaging claw of the lock lever is changed. A technique for forming a curved surface shape is disclosed. In Patent Document 1, at least one of the engagement surface of the fixed hook and the engagement surface of the engagement claw of the lock lever is made into a curved shape, so that the engagement surface of the engagement claw and the engagement surface of the fixed hook portion is made curved. The effect of reducing the excessive tensile force that occurs when the gap between the two is reduced is described.

Japanese Patent Application Publication No. 2015-51843

However, in the configuration disclosed in Patent Document 1, the curved surface that constitutes the engagement surface of the fixed hook portion or the engagement surface of the engagement claw of the lock lever does not change the position of the engagement surface in the vertical direction. . Therefore, even in the configuration disclosed in Patent Document 1, when the gap between the engagement claw of the lock lever and the engagement surface of the fixed hook portion becomes smaller or becomes zero, , the engaging claw of the lock lever that rotates and the engaging surface of the fixed hook interfere with each other.

Therefore, the present invention provides an elevator door device and an elevator that have a door locking mechanism that reduces the risk of tampering.

The elevator door device of the present invention solves the above problems and is rotatably supported by a door part provided movably in the opening/closing direction and a rotating shaft provided in the door part, and the rotating shaft is and a lock lever having an engaging pawl at the opposite end. Further, when the door portion is closed, the fixed hook portion has an engaging piece provided so as to be able to engage with the engaging claw, and one side of the engaging surface facing the engaging claw side of the engaging piece. The shape when viewed from the direction along the axial direction of the rotation shaft is configured to have the same shape as the rotation locus of the peak portion of the engagement claw located at the position closest to the rotation axis.

Furthermore, the elevator of the present invention includes the elevator door device described above.

According to the present invention, in the elevator door lock mechanism, the risk of the lock not being unlocked is reduced.

1 is a schematic configuration diagram of an elevator door device according to a first embodiment of the present invention. An enlarged view of the door lock mechanism 10 according to the first embodiment is shown. An enlarged view of the main parts of the door lock mechanism 10 according to the first embodiment is shown. A schematic configuration diagram of a door lock mechanism according to a comparative example is shown. FIG. 3 shows a schematic configuration diagram of a door lock mechanism according to a second embodiment of the present invention.

Hereinafter, an example of an elevator door device according to an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following examples. In each figure described below, common members are given the same reference numerals.

1. First Embodiment FIG. 1 is a schematic configuration diagram of an elevator door device according to a first embodiment (hereinafter referred to as the present embodiment) of the present invention. In this embodiment, as an example of an elevator door device, a landing door device (hereinafter referred to as a landing door device 100) provided at a building entrance will be described as an example.

1-1. Configuration of Hallway Door Device FIG. 1 is a front view of a hall door device 100 viewed from the car side of an elevator that moves up and down in a hoistway. The configuration of the landing door device 100 of this embodiment will be explained using FIG. 1. As shown in FIG. 1, the landing door device 100 includes a pair of

landing doors

300, 300, a landing door opening/closing mechanism 200, and a door locking mechanism 10.

[Passenger door]
A pair of landing doors 300, 300 (corresponding to the door section of the present invention) are provided at an entrance where an elevator car on the building side stops, and are provided with a landing door opening/closing mechanism provided at the upper end of the entrance in the vertical direction. 200 so as to be openable and closable. A landing side door sill 213 that supports the pair of

landing doors

300, 300 is provided at the lower end of the entrance in the vertical direction. The pair of

landing doors

300, 300 are opened and closed in the left-right direction along the extending direction of the landing door sill by the landing door opening/closing mechanism 200.

[Passenger door opening/closing mechanism]
The landing door opening/closing mechanism 200 includes a building side door rail 215, a pair of

door hangers

221, 221, a first pulley 216, a second pulley 218, and a transmission belt 217. The building side door rail 215 is a rail member on which a moving roller 224 (described later) can rotate and move, and is provided above the

landing doors

300, 300 in the vertical direction. The building side door rail 215 is provided so as to extend in a direction along the opening/closing direction of the pair of

landing doors

300, 300.

The pair of

door hangers

221, 221 are provided at the upper ends of the pair of

landing doors

300, 300 in the vertical direction, respectively. A pair of moving

rollers

224, 224 are rotatably attached to the

door hangers

221, 221, respectively. The moving

rollers

224, 224 are slidably engaged with the building side door rail 215.

Furthermore, a first connecting member 222 and a second connecting member 223 are provided on each of the two

door hangers

221, 221. The first connecting member 222 and the second connecting member 223 are connected to a transmission belt 217, which will be described later. Furthermore, one of the two

door hangers

221, 221 is provided with a lock lever 11 that constitutes a door lock mechanism 10, which will be described later.

The first pulley 216 is provided on one side in the opening/closing direction of the

landing doors

300, 300, and the second pulley 218 is provided on the other side in the opening/closing direction of the

landing doors

300, 300. That is, the first pulley 216 and the second pulley 218 are provided above the

landing doors

300, 300, respectively, at positions sandwiching the pair of

landing doors

300, 300.

A transmission belt 217 is wound around the first pulley 216 and the second pulley 218. The transmission belt 217 is an endless belt whose longitudinal ends are connected. Therefore, the upper and lower parts of the transmission belt 217 in the vertical direction rotate in opposite directions.

A first connecting member 222 is connected to the lower part of the transmission belt 217 on the return side, and a second connecting member 223 is connected to the upper part of the transmission belt 217 on the outgoing side. The first connecting member 222 is fixed to one door hanger 221, and the second connecting member 223 is fixed to the other door hanger 221. As a result, when the transmission belt 217 moves, the pair of

landing doors

300, 300 move toward each other in the door-closing direction or move away from each other in the door-opening direction via the first connecting member 222 and the second connecting member 223.

[Door lock mechanism]
The door lock mechanism 10 includes a lock lever 11 and a fixed hook portion 15 configured to be engageable with the lock lever 11. The door lock mechanism 10 is provided above the pair of

landing doors

300, 300 in the vertical direction. The door lock mechanism 10 is a mechanism that locks the landing

doors

300, 300 in the closed state. The present invention is characterized by the door lock mechanism 10. FIG. 2 shows a schematic configuration diagram of the door lock mechanism 10 of this embodiment, and FIG. 3 shows an enlarged view of the main parts of the door lock mechanism 10 of this embodiment.

The lock lever 11 is a plate member that includes a bearing part 13, an engaging pawl 12 provided on the opposite end side of the bearing part 13, and a connecting part 14 that connects the bearing part 13 and the engaging pawl 12. It is configured. The bearing portion 13 is rotatably supported by a rotation shaft 20 fixed to one of the pair of

door hangers

221, 221. The connecting portion 14 extends from the bearing portion 13 toward the other door hanger 221 side. The engaging pawl 12 is provided on the distal end side of the connecting portion 14 so as to protrude toward the fixed hook portion 15 in the rotation direction. The surface of the engaging claw 12 on the rotating shaft 20 side becomes a claw-side engaging surface 12a that faces the engaging piece 16 of the fixed hook portion 15 when engaged with the fixed hook portion 15, which will be described later.

In this embodiment, the portion of the claw-side engagement surface 12a of the engagement claw 12 that is closest to the rotation axis 20 (in this embodiment, the tip portion of the engagement claw 12) is referred to as a peak portion P. . Since the lock lever 11 is rotatably supported with respect to the rotation shaft 20, it rotates toward and away from the fixed hook portion 15. In this case, the rotation locus of the peak portion P of the engaging claw 12 is as shown by the chain line in FIG. 3 .

In the present embodiment, the claw-side engagement surface 12a of the engagement claw 12 is formed of a concave curved surface, but may be formed of a flat surface, or may be formed of a convex curved surface protruding toward the rotation shaft 20 side. may be done. In addition, when the claw-side engaging surface 12a is composed of a convex curved surface that protrudes toward the rotating shaft 20 side, the peak portion P is not the tip portion of the engaging claw 12 but the peak portion P of the convex curved surface. , is set at the part closest to the rotation axis 20.

The fixed hook part 15 is attached to the inner wall side of the hoistway on the upper side of the landing

doors

300, 300 in the vertical direction, or to the other door of the pair of

door hangers

221, 221, which is different from the side on which the lock lever 11 is provided. It is fixed to the hanger 221. The fixed hook portion 15 has an engagement piece 16. The engagement piece 16 is provided at the end of the fixed hook portion 15 on the lock lever 11 side. The engagement piece 16 projects upward in the vertical direction. The surface of the engagement piece 16 opposite to the end surface on the lock lever 11 side becomes a one-sided engagement surface 16a that engages with the engagement claw 12 of the lock lever 11.

In this embodiment, the one-side engagement surface 16a of the engagement piece 16 is formed of a curved surface, and when viewed from a direction perpendicular to the rotation surface of the lock lever 11 (direction along the rotation axis 20). The shape is configured to be the same as the rotation locus of the peak portion P of the engaging claw 12. That is, the curved surface of the one-sided engagement surface 16a has a curvature whose radius of curvature is the distance from the center of the rotation shaft 20 to the peak portion P. Note that the rotation locus of the peak portion P of the engagement claw 12 is determined by the distance from the center of the rotation shaft 20 to the peak portion P.

1-2. Operation of Door Lock Mechanism Next, the operation of the door lock mechanism 10 will be explained. As shown in FIG. 1, in the door lock mechanism 10, when the landing

doors

300, 300 are in a closed state, the lock lever 11 rotates toward the fixed hook portion 15, and the engagement pawl 12 of the lock lever 11 and the fixed hook Locking is achieved by the engagement of the portion 15 with the engagement piece 16. To release the lock, the lock lever 11 is rotated in the direction away from the fixed hook portion 15 (in the direction indicated by the arrow O in FIG. 3), thereby releasing the lock.

In this embodiment, the one-side engagement surface 16a of the engagement piece 16 is configured to have the same shape as the rotation locus of the peak portion P of the claw-side engagement surface 12a of the engagement claw 12. Therefore, even if the gap between the peak part P of the engagement pawl 12 of the lock lever 11 and the one-side engagement surface 16a of the engagement piece 16 of the fixed hook part 15 is small or zero, the lock lever 11 can be rotated. When moving, the rotation locus of the engaging claw 12 does not interfere with the engaging piece 16.

1-3. Comparative Example FIG. 4 shows a conventional door lock mechanism 50 according to a comparative example. In FIG. 4, parts having the same configuration as the door lock mechanism 10 of this embodiment are given the same reference numerals, and redundant explanation will be omitted. As shown in FIG. 4, in the conventional door lock mechanism 50, the configuration of the fixed hook portion 51 is different from the fixed hook portion 15 in this embodiment. As shown in FIG. 4, in the conventional fixed hook portion 51, one side of the engagement surface 52a of the engagement piece 52 has a planar shape extending in the vertical direction.

Further, in the conventional door lock mechanism 50, as shown in FIG. 12a and the one-side engagement surface 52a of the engagement piece 52 of the fixed hook portion 51, a gap w of approximately several mm is provided. Thereby, the rotation locus of the lock lever 11 and the engagement piece 52 of the fixed hook portion 51 are configured not to interfere with each other.

However, due to insufficient closer force, which is a force acting on the

landing doors

300, 300 in the door closing direction, or an external force applied to the

landing doors

300, 300, the gap w between the one-side engagement surface 52a and the claw-side engagement surface 12a may be smaller than expected. In this case, in the conventional door lock mechanism 50, the engagement piece 52 of the fixed hook portion 51 is located on the rotation locus of the lock lever 11, and the engagement claw 12 and the engagement piece 52 interfere with each other. There is a risk that the lock will be unlocked.

On the other hand, in the door lock mechanism 10 of the present embodiment, as described above, even when there is no gap between the engagement surface 16a on the engagement side and the engagement surface 12a on the claw side, the engagement claw 12 Since there is no interference with the joint piece 16, it is possible to prevent the problem of the lock not being unlocked.

Furthermore, in this embodiment, since the one-side engagement surface 16a has the same shape as the rotation locus of the lock lever 11, the contact point between the peak portion P and the one-side engagement surface 16a is the rotation locus of the lock lever 11. Come on top. Therefore, even if a door-opening force is applied to the

landing doors

300, 300 during locking, the unlocking moment becomes 0, so that the door locking function is not impaired.

By the way, a force (closer force) acting in the door closing direction is applied to the

landing doors

300, 300 when the doors are closed. In the conventional door lock mechanism 50 according to the comparative example, when the landing

doors

300, 300 are closed, there is a predetermined distance between the engagement piece 52 of the fixed hook part 51 and the engagement claw 12 of the lock lever 11. It is configured to have a gap w, and because of this gap w, the lock can be unlocked without interference between the engaging claw 12 of the lock lever 11 and the engaging piece 52 of the fixed hook part 51. Therefore, if the closing force weakens and the gap w between the engaging claw 12 of the lock lever 11 and the engaging piece 52 of the fixed hook part 51 becomes smaller than a predetermined value, there is a possibility that the lock will not be opened. Therefore, with the conventional door lock mechanism 50, it was not possible to set the closing force low.

In contrast, in the door lock mechanism 10 of the present embodiment, the door is not unlocked even when the distance between the engaging pawl 12 of the lock lever 11 and the engaging piece 52 of the fixed hook portion 51 becomes zero. This problem can be prevented. Therefore, in the

landing doors

300, 300, the closing force can be set low, and costs can be reduced.

2. Second Embodiment Next, a door lock mechanism according to a second embodiment of the present invention will be described. FIG. 5 is an enlarged view of main parts of the door lock mechanism 40 according to the second embodiment. In FIG. 5, parts corresponding to those in FIG. 2 are designated by the same reference numerals, and redundant explanation will be omitted.

In the second embodiment, as shown in FIG. 5, the claw side engagement surface 42a of the engagement claw 42 of the lock lever 41 has a concave curved surface when viewed from a direction perpendicular to the rotation surface. is configured to have the same shape as the rotation locus of the peak portion P of the engaging claw 42. That is, the claw-side engagement surface 42a and the one-side engagement surface 16a are configured in a shape that allows them to engage with each other without a gap, and when the lock lever 41 rotates, the engagement claw 42 and the engagement piece 16 so as not to interfere with each other.

In this way, even when the shape of the claw-side engaging surface 42a is made the same as the rotation locus of the peak portion P of the lock lever 41, interference between the engaging claw 42 and the engaging piece 16 is prevented. This prevents the lock from becoming unopenable.

As described above, in the first and second embodiments, the door lock mechanism that locks the landing door provided at the entrance/exit of the car has been described as an example, but the car door provided at the entrance/exit of the car has been described as an example. The configuration of the present invention may be applied to a door lock mechanism that locks the door.

The embodiments described above are described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. For example, it is possible to replace a part of the configuration of the embodiment with another configuration, and it is also possible to add other configurations to the configuration of the embodiment. Furthermore, it is possible to add, delete, or replace some of the configurations of the embodiments with other configurations.

DESCRIPTION OF SYMBOLS 10... Door lock mechanism, 11... Lock lever, 12... Engagement claw, 12a... Claw side engagement surface, 13... Bearing part, 14... Connection part, 15... Fixed hook part, 16... Engagement piece, 16a... One side Engagement surface, 20... Rotating shaft, 21... Door hanger, 100... Landing side door device, 200... Landing door opening/closing mechanism, 213... Landing side door sill, 215... Building side door rail, 216... First pulley, 217... Transmission Belt, 218... Second pulley, 221... Door hanger, 222... First connecting member, 223... Second connecting member, 224... Moving roller, 300... Landing door

Claims

A door part that is movable in the opening and closing direction;
a lock lever that is rotatably supported by a rotation shaft provided on the door portion and has an engaging pawl at an end opposite to the rotation shaft;
a fixed hook portion having an engaging piece that is capable of engaging with the engaging claw when the door portion is closed;
The shape of one engaging surface of the engaging piece facing the engaging claw side when viewed from the direction along the axial direction of the rotating shaft is located at a position closest to the rotating shaft of the engaging claw. An elevator door device configured to have the same shape as the rotation locus of a certain peak.
The shape of the claw-side engagement surface of the engagement claw facing the one-side engagement surface when viewed from the direction along the axial direction of the rotation shaft is the same shape as the rotation locus of the peak portion. The elevator door device according to claim 1, comprising:
The elevator door device according to claim 1, wherein the lock lever rotates and engages with the engagement piece of the fixed hook portion from above in the vertical direction.
A car that moves up and down the hoistway,
A door device comprising: a door portion that is openably and closably provided at the entrance/exit of the car and/or the entrance/exit of the landing where the car stops; and a door lock mechanism that locks the door portion in an unlockable manner. Prepare,
The door lock mechanism includes:
a lock lever rotatably supported on one side of the door portion and having an engagement pawl at an end opposite to the rotation axis;
a fixed hook portion having an engaging piece that is capable of engaging with the engaging claw when the door portion is closed;
A shape of one side of the engaging surface of the engaging piece facing the engaging claw when viewed from a direction along the axial direction of the rotating shaft is located at a position closest to the rotating shaft of the engaging claw. An elevator configured to have the same shape as the rotation locus of the peak part.