Elevator door device and elevator

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

[Technical Field]

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

[0002] Conventionally, elevators are provided with door lock mechanisms for locking and unlocking the opening and closing operations of the doors on the landing side and the car door on the car side.

[0003] For example, the door lock mechanism on the landing door side is composed of a fixed hook member fixed to the elevator shaft side and a lock lever provided on the landing door side that rotates toward the fixed hook member. The fixed hook member has a hook portion at its tip on the lock lever side that engages with the lock lever. The hook portion has a vertical engagement surface that extends perpendicular to the horizontal plane, and an engagement claw provided at the tip of the lock lever engages with this engagement surface to lock the opening and closing operation of the door.

[0004] In the past, the door lock mechanism described above was designed to prevent interference between the engagement surface of the hook portion of the fixed hook member and the engagement claw of the lock lever when the door was locked by providing a gap between them during the unlocking operation. In this type of design, if the gap between the engagement surface and the engagement claw becomes smaller than expected due to a foreign object or external factor, there is a risk that the engagement surface and the engagement claw will interfere with each other during the unlocking operation, causing the door to not unlock.

[0005] In response to this, Patent Document 1 discloses a technology in which, in an interlock mechanism consisting of a fixed hook and a lock lever, at least one of the engagement surface of the fixed hook or the engagement surface of the engagement claw of the lock lever is curved. Patent Document 1 describes the effect of curving at least one of the engagement surface of the fixed hook or the engagement surface of the engagement claw of the lock lever, thereby reducing excessive tension force that occurs when the gap between the engagement claw and the engagement surface of the fixed hook becomes small. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-51843 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the configuration disclosed in Patent Document 1, the curved surfaces that constitute the engagement surface of the fixed hook portion or the engagement surface of the engagement claw of the lock lever do not change the position of the engagement surface in the vertical direction. Therefore, even in the configuration disclosed in Patent Document 1, if the gap between the engagement claw of the lock lever and the engagement surface of the fixed hook portion becomes small or becomes zero, the engagement claw of the lock lever, which rotates and moves, will interfere with the engagement surface of the fixed hook.

[0008] Therefore, the present invention provides an elevator door device and an elevator having a door lock mechanism that reduces the risk of unlocking. [Means for solving the problem]

[0009] To solve the above problems, the elevator door device of the present invention includes a door section that is movable in the opening and closing direction, and a lock lever that is rotatably supported on a rotation shaft provided in the door section and has an engagement claw at the end opposite the rotation shaft. The door also has a fixed hook section with an engagement piece that is engageable with the engagement claw when the door section is closed, and the shape of the engagement surface on one side of the engagement piece that faces the engagement claw when viewed from the axial direction of the rotation shaft is configured to be the same as the rotation locus of the peak section that is located closest to the rotation shaft of the engagement claw.

[0010] An elevator according to the present invention includes the above-described elevator door device. [Effects of the Invention]

[0011] According to the present invention, the risk of unlocking in an elevator door lock mechanism is reduced. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic configuration diagram of an elevator door device according to a first embodiment of the present invention. [Figure 2] 1 shows an enlarged view of a door lock mechanism 10 according to a first embodiment. [Figure 3] 1 is an enlarged view of a main part of a door lock mechanism 10 according to a first embodiment. [Figure 4] FIG. 10 is a schematic diagram illustrating a door lock mechanism according to a comparative example. [Figure 5] FIG. 10 is a schematic diagram illustrating a door lock mechanism according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] An example of an elevator door device according to an embodiment of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the following example. In each of the drawings described below, common components are designated by the same reference numerals.

[0014] 1. First embodiment 1 is a schematic diagram of an elevator door device according to a first embodiment of the present invention (hereinafter referred to as the present embodiment). In this embodiment, a hall-side door device (hereinafter referred to as hall-side door device 100) provided at an entrance / exit on the building side will be described as an example of the elevator door device.

[0015] 1-1.Configuration of landing side door device Fig. 1 is a front view of a landing-side door device 100 as seen from the car side of an elevator moving up and down in a hoistway. The configuration of the landing-side door device 100 of this embodiment will be described with reference to Fig. 1. As shown in Fig. 1, the landing-side door device 100 has a pair of landing doors 300, 300, a landing-door opening / closing mechanism 200, and a door lock mechanism 10.

[0016] [Landing 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 supported so as to be openable and closable by a landing door opening / closing mechanism 200 provided at an upper end in the vertical direction of the entrance. A landing-side door sill 213 that supports the pair of landing doors 300, 300 is provided at a lower end in the vertical direction of the entrance. The pair of landing doors 300, 300 are opened and closed in the left-right direction along the extension direction of the landing-side door sill by the landing door opening / closing mechanism 200.

[0017] [Landing door opening / closing mechanism] The landing door opening / closing mechanism 200 has 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) is rotatable, and is provided above the landing doors 300 in the up-down 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.

[0018] The pair of door hangers 221, 221 are provided at the upper end portions in the up-down direction of the pair of landing doors 300, 300, respectively. A pair of moving rollers 224, 224 are rotatably attached to the door hangers 221, 221, respectively. The moving rollers 224, 224 slidably engage with the building-side door rail 215.

[0019] Each of the two door hangers 221, 221 is provided with a first connecting member 222 and a second connecting member 223. The first connecting member 222 and the second connecting member 223 are connected to a transmission belt 217, which will be described later. Of the two door hangers 221, 221, one of the door hangers 221 is provided with a lock lever 11 that constitutes a door lock mechanism 10, which will be described later.

[0020] 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, at positions that sandwich the pair of landing doors 300, 300 therebetween.

[0021] 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 two longitudinal ends are connected together. Therefore, the upper and lower parts of the transmission belt 217 move in opposite directions.

[0022] A first connecting member 222 is connected to a lower portion of the transmission belt 217 on the return path side, and a second connecting member 223 is connected to an upper portion of the transmission belt 217 on the outward path 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 a door-closing direction or away from each other in a door-opening direction via the first connecting member 222 and the second connecting member 223.

[0023] [Door lock mechanism] The door lock mechanism 10 is made up of a lock lever 11 and a fixed hook portion 15 configured to be able to engage with the lock lever 11. The door lock mechanism 10 is provided at the top of a 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 when the doors are in a 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 a main portion of the door lock mechanism 10 of this embodiment.

[0024] The lock lever 11 is composed of a plate member including a bearing portion 13, an engagement claw 12 provided at the tip side opposite the bearing portion 13, and a connection portion 14 connecting the bearing portion 13 and the engagement claw 12. The bearing portion 13 is rotatably supported by a rotation shaft 20 fixed to one of a pair of door hangers 221, 221. The connection portion 14 extends from the bearing portion 13 toward the other door hanger 221. The engagement claw 12 is provided at the tip side of the connection portion 14 so as to protrude toward the fixed hook portion 15 in the rotation direction. The surface of the engagement claw 12 on the rotation shaft 20 side becomes a claw-side engagement surface 12a that faces an engagement piece 16 of the fixed hook portion 15 when engaged with the fixed hook portion 15 described below.

[0025] In this embodiment, the portion of the claw-side engagement surface 12a of the engagement claw 12 that is closest to the pivot shaft 20 (in this embodiment, the tip of the engagement claw 12) is referred to as the peak portion P. Since the lock lever 11 is supported so as to be rotatable (rotatable) about the pivot shaft 20, it pivots toward and away from the fixed hook portion 15. In this case, the pivot trajectory of the peak portion P of the engagement claw 12 is shown by the dashed line in FIG. 3.

[0026] In this embodiment, the claw-side engagement surface 12a of the engagement claw 12 is configured as a concave curved surface, but it may also be configured as a flat surface, or as a convex curved surface that protrudes toward the rotation shaft 20. When the claw-side engagement surface 12a is configured as a convex curved surface that protrudes toward the rotation shaft 20, the peak portion P is set not at the tip portion of the engagement claw 12, but at the portion of the convex curved surface that is closest to the rotation shaft 20.

[0027] The fixed hook portion 15 is fixed to the inner wall side of the elevator shaft, or to the other door hanger 221 of the pair of door hangers 221, 221 that is different from the side on which the lock lever 11 is provided, on the upper side of the landing doors 300, 300 in the up-down direction. 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 protrudes upward in the up-down direction. The surface of the engagement piece 16 opposite to the end surface on the lock lever 11 side forms a one-side engagement surface 16a that engages with the engagement claw 12 of the lock lever 11.

[0028] In this embodiment, one engagement surface 16a of the engagement piece 16 is configured as a curved surface, and its shape when viewed from a direction perpendicular to the rotation plane of the lock lever 11 (a direction along the rotation shaft 20) is configured to be the same shape as the rotation trajectory of the peak portion P of the engagement claw 12. In other words, the curved surface of the one 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. The rotation trajectory 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.

[0029] 1-2. Door lock mechanism operation Next, the operation of the door lock mechanism 10 will be described. As shown in Fig. 1, when the landing doors 300, 300 are in a closed state, the door lock mechanism 10 is locked by the lock lever 11 rotating toward the fixed hook portion 15 and the engagement claw 12 of the lock lever 11 engaging with the engagement piece 16 of the fixed hook portion 15. To release the lock, the lock lever 11 is rotated in a direction away from the fixed hook portion 15 (the direction indicated by arrow O in Fig. 3), thereby releasing the lock.

[0030] In this embodiment, one-side engagement surface 16a of engagement piece 16 is configured to have the same shape as the rotation trajectory of peak portion P of claw-side engagement surface 12a of engagement claw 12. Therefore, even if the gap between peak portion P of engagement claw 12 of lock lever 11 and one-side engagement surface 16a of engagement piece 16 of fixed hook portion 15 is small or zero, the rotation trajectory of engagement claw 12 does not interfere with engagement piece 16 when lock lever 11 rotates.

[0031] 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 those in the door lock mechanism 10 of the present embodiment are given the same reference numerals, and duplicated explanations 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 that of the fixed hook portion 15 of the present embodiment. As shown in Fig. 4, in the conventional fixed hook portion 51, one engagement surface 52a of the engagement piece 52 is configured in a planar shape extending in the vertical direction.

[0032] 4, in the conventional door lock mechanism 50, when the engagement piece 52 and the engagement claw 12 are engaged, a gap w of about several mm is provided between the claw-side engagement surface 12a of the engagement claw 12 of the lock lever 11 that rotates and the one-side engagement surface 52a of the engagement piece 52 of the fixed hook portion 51. This prevents interference between the rotational trajectory of the lock lever 11 and the engagement piece 52 of the fixed hook portion 51.

[0033] However, there are cases where the gap w between the one-side engagement surface 52a and the claw-side engagement surface 12a becomes smaller than expected due to insufficient closing force, which is a force acting on the landing doors 300, 300 in the door closing direction, or due to external force acting on the landing doors 300, 300. In this case, in the conventional door lock mechanism 50, the engagement piece 52 of the fixed hook portion 51 is positioned on the rotation locus of the lock lever 11, and the engagement claw 12 and the engagement piece 52 interfere with each other, which may result in the door not being unlocked.

[0034] In contrast, in the door lock mechanism 10 of this embodiment, as described above, even if there is no gap between the engagement piece side engagement surface 16a and the claw side engagement surface 12a, the engagement claw 12 and the engagement piece 16 do not interfere with each other, thereby preventing the problem of the lock not being unlocked.

[0035] In addition, in this embodiment, the one-side engagement surface 16a has the same shape as the rotation trajectory of the lock lever 11, and therefore the point of contact between the peak portion P and the one-side engagement surface 16a is on the rotation trajectory of the lock lever 11. Therefore, even if a door-opening force acts on the landing doors 300, 300 when the doors are locked, the unlocking moment becomes 0, and the door lock function is not impaired.

[0036] Incidentally, when the landing doors 300, 300 are closed, a force (closing force) acting in the door closing direction is applied to the landing doors 300, 300. In the conventional door lock mechanism 50 according to the comparative example, when the landing doors 300, 300 are closed, a gap w of a predetermined distance is provided between the engagement piece 52 of the fixed hook portion 51 and the engagement claw 12 of the lock lever 11. Due to the presence of this gap w, the engagement claw 12 of the lock lever 11 and the engagement piece 52 of the fixed hook portion 51 do not interfere with each other, thereby unlocking the landing doors 300, 300. Therefore, if the closing force is weakened and the gap w between the engagement claw 12 of the lock lever 11 and the engagement piece 52 of the fixed hook portion 51 becomes smaller than a predetermined value, there is a risk of the landing doors not being unlocked. For this reason, in the conventional door lock mechanism 50, it was not possible to set the closing force low.

[0037] In contrast to this, the door lock mechanism 10 of the present embodiment can prevent the problem of not being able to unlock even when the distance between the engaging claw 12 of the lock lever 11 and the engaging piece 52 of the fixed hook portion 51 becomes zero. Therefore, the closing force of the landing doors 300, 300 can be set low, and costs can be reduced.

[0038] 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 a main part of a door lock mechanism 40 according to the second embodiment. In Fig. 5, parts corresponding to those in Fig. 2 are given the same reference numerals and redundant explanations will be omitted.

[0039] 5, in the second embodiment, 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 plane, and the curved surface is configured to have the same shape as the rotation trajectory of the peak portion P of the engagement claw 42. In other words, the claw-side engagement surface 42a and the one-side engagement surface 16a are configured to have shapes that allow them to engage with each other without any gaps, and are configured so that the engagement claw 42 and the engagement piece 16 do not interfere with each other when the lock lever 41 rotates.

[0040] In this way, even if the shape of the claw side engagement surface 42a is made the same as the rotational trajectory of the peak portion P of the lock lever 41, there is no interference between the engagement claw 42 and the engagement piece 16, thereby preventing the lock from being unlocked.

[0041] In the above, in the first and second embodiments, a door lock mechanism that locks a landing door provided at the entrance and exit of a landing has been described as an example of the door lock mechanism, but the configuration of the present invention may also be applied to a door lock mechanism that locks a car door provided at the entrance and exit of a car.

[0042] The above-described embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to having all of the described configurations. For example, it is possible to replace part of the configuration of the embodiment with another configuration, or to add another configuration to the configuration of the embodiment. It is also possible to add, delete, or replace part of the configuration of the embodiment with another configuration. [Explanation of symbols]

[0043] 10...door lock mechanism, 11...lock lever, 12...engagement claw, 12a...claw-side engagement surface, 13...bearing portion, 14...connection portion, 15...fixed hook portion, 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

1. a door portion provided so as to be movable in an opening and closing direction; a lock lever that is rotatably supported on a rotation shaft provided in the door portion and has an engaging claw at an end opposite to the rotation shaft; a fixed hook portion having an engagement piece that is provided so as to be engageable with the engagement claw when the door portion is closed, The shape of the engaging surface of the engaging piece on one side facing the engaging claw when viewed from the axial direction of the pivot shaft is configured to be the same as the shape of the rotation locus of the peak portion of the engaging claw located closest to the pivot shaft. Elevator door device.

2. The shape of the claw-side engagement surface of the engagement claw, which faces the one-side engagement surface, when viewed from the axial direction of the rotation shaft is configured to be the same as the shape of the rotation locus of the peak portion. The elevator door device according to claim 1.

3. The lock lever rotates and engages with the engagement piece of the fixed hook portion from above in the vertical direction. The elevator door device according to claim 1.

4. A car that moves up and down the elevator shaft, a door device having a door section provided at an entrance / exit of the elevator car and / or at an entrance / exit of a landing where the elevator car stops, which can be opened and closed, and a door lock mechanism that locks the door section in an unlockable manner; The door lock mechanism is a lock lever that is rotatably supported on one side of the door portion and has an engaging claw at an end opposite to the pivot shaft; a fixed hook portion having an engagement piece that is provided so as to be engageable with the engagement claw when the door portion is closed, The shape of the engaging surface of the engaging piece on one side facing the engaging claw when viewed from the axial direction of the pivot shaft is configured to be the same as the shape of the rotation locus of the peak portion of the engaging claw located closest to the pivot shaft. Elevator.

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