Door arrangement of an elevator and elevator

Abstract

Provided are: a lock lever provided with an engaging claw; and a fixing hook portion provided with an engaging piece capable of engaging with the engaging claw. When the engaging claw and the engaging piece are engaged, the shape of a single engaging surface of the engaging piece on the side of the engaging claw, as viewed in the direction along the axial direction of the rotation shaft, is configured to be the same as the shape of the rotation track of the peak portion of the engaging claw closest to the rotation shaft.

Description

Technical Field

[0001] This invention relates to elevator door devices and elevators. Background Technology

[0002] Previously, elevators were equipped with door locking mechanisms that locked and unlocked the doors when they opened and closed, located on the lobby side and the car side.

[0003] For example, the door locking mechanism on the side of the elevator lobby door consists of a fixed hook member fixed to the side of the elevator shaft and a locking rod disposed on the side of the elevator lobby door and rotating towards the fixed hook member. The fixed hook member has a hook portion at its front end on the locking rod side that engages with the locking rod. The hook portion has a vertical engagement surface extending in a vertical direction relative to the horizontal plane. By engaging the engagement claw disposed at the front end of the locking rod with this engagement surface, the opening and closing action of the door can be locked.

[0004] In the past, in the aforementioned door locking mechanisms, a gap was created between the engaging surface of the hook portion of the fixed hook member and the engaging pawl of the locking rod during door locking, thus preventing interference between the engaging pawl and the engaging surface during unlocking. However, in such a structure, if the gap between the engaging surface and the engaging pawl is smaller than intended due to foreign objects or external factors, interference between the engaging surface and the engaging pawl during unlocking may prevent the door from being unlocked.

[0005] In contrast, Patent Document 1 discloses a technique in which at least one of the engaging surfaces of the fixed hook and the locking pawl of the locking pawl is made curved. Patent Document 1 describes the effect that by making at least one of the engaging surfaces of the fixed hook and the locking pawl curved, excessive pulling force is reduced when the gap between the engaging surfaces of the locking pawl and the fixed hook becomes smaller.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2015-51843 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] However, in the structure disclosed in Patent Document 1, the curved surface of the engaging surface constituting the fixed hook or the engaging surface of the engaging claw of the locking rod does not change the position of the engaging surface in the vertical direction. Therefore, in the structure disclosed in Patent Document 1, when the gap between the engaging claw of the locking rod and the engaging surface of the fixed hook becomes smaller or the gap becomes zero, interference will still occur between the engaging claw of the rotating locking rod and the engaging surface of the fixed hook.

[0011] Therefore, the present invention provides a door device and an elevator having a door locking mechanism that reduces the risk of being unable to unlock.

[0012] Methods for solving problems

[0013] To solve the above-mentioned problems, the elevator door device of the present invention includes: a door portion configured to move in an opening and closing direction; a locking lever supported on a rotation axis of the door portion and rotatable, having an engaging pawl at an end opposite to the rotation axis. Additionally, it includes a fixing hook portion having an engaging piece configured to engage with the engaging pawl when the door portion is closed, wherein the shape of the engaging surface of the engaging piece opposite the engaging pawl side, when viewed from the axial direction along the rotation axis, is configured to have the same shape as the rotation trajectory of the peak of the engaging pawl located closest to the rotation axis.

[0014] Furthermore, the elevator of the present invention includes the door device of the elevator described above.

[0015] Invention Effects

[0016] According to the present invention, the risk of being unable to unlock the elevator door locking mechanism is reduced. Attached Figure Description

[0017] Figure 1 This is a schematic structural diagram of the elevator door device according to the first embodiment of the present invention.

[0018] Figure 2 An enlarged view of the door locking mechanism 10 according to the first embodiment is shown.

[0019] Figure 3 An enlarged view showing the main parts of the door locking mechanism 10 of the first embodiment is shown.

[0020] Figure 4 A schematic diagram of the door locking mechanism of the comparative example is shown.

[0021] Figure 5 A schematic structural diagram of a door locking mechanism according to a second embodiment of the present invention is shown. Detailed Implementation

[0022] Hereinafter, an example of an elevator door device according to an embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the present invention is not limited to the following example. In the figures described below, common components are labeled with the same reference numerals.

[0023] 1. First Implementation Method

[0024] Figure 1 This is a schematic structural diagram of the elevator door device according to the first embodiment of the present invention (hereinafter referred to as this embodiment). In this embodiment, the door device provided on the waiting hall side of the entrance / exit on the building side (hereinafter, waiting hall side door device 100) will be described as an example of the elevator door device.

[0025] 1-1. Structure of the side door device in the elevator lobby

[0026] Figure 1 This is a front view of the lobby side door device 100, viewed from the elevator car side of the elevator moving up and down within the elevator shaft. (Usage) Figure 1 The structure of the elevator lobby side door device 100 in this embodiment will be described. Figure 1 As shown, the elevator hall side door device 100 has a pair of elevator hall doors 300, 300, an elevator hall door opening and closing mechanism 200, and a door locking mechanism 10.

[0027] [Elevator lobby door]

[0028] A pair of hall doors 300, 300 (corresponding to the door portion of this invention) are provided at the entrance / exit of the elevator car for which the elevator on the building side stops, and are supported by a hall door opening / closing mechanism 200 located at the upper end of the entrance / exit in the vertical direction, enabling them to be opened and closed. A hall door sill 213 supporting the pair of hall doors 300, 300 is provided at the lower end of the entrance / exit in the vertical direction. The pair of hall doors 300, 300 are opened and closed in the left-right direction along the extension direction of the hall door sill by the hall door opening / closing mechanism 200.

[0029] [Elevator lobby door opening and closing mechanism]

[0030] The elevator hall door opening and closing mechanism 200 includes a building side door guide rail 215, a pair of door hangers 221, 221, a first pulley 216, a second pulley 218, and a drive belt 217. The building side door guide rail 215 is a guide rail member that can rotate and move the movable rollers 224 (described later), and is located above the elevator hall doors 300, 300 in the vertical direction. The building side door guide rail 215 is configured to extend in the direction along the opening and closing direction of the pair of elevator hall doors 300, 300.

[0031] A pair of door hangers 221, 221 are respectively installed at the upper ends of a pair of elevator hall doors 300, 300 in the vertical direction. A pair of movable rollers 224, 224 are respectively installed on the door hangers 221, 221 in a rotatable manner. The movable rollers 224, 224 are engaged with the building side door guide rail 215 in a slidable manner.

[0032] Furthermore, a first connecting member 222 and a second connecting member 223 are respectively provided on the two door hangers 221, 221. The first connecting member 222 and the second connecting member 223 are connected to the transmission belt 217 described later. In addition, a locking rod 11 constituting the door locking mechanism 10 described later is provided on one of the two door hangers 221, 221.

[0033] The first pulley 216 is located on one side of the opening and closing direction of the elevator hall doors 300, 300, and the second pulley 218 is located on the other side of the opening and closing direction of the elevator hall doors 300, 300. That is, the first pulley 216 and the second pulley 218 are respectively located above the elevator hall doors 300, 300, in a position that sandwiches the pair of elevator hall doors 300, 300.

[0034] A drive belt 217 is wound around the first pulley 216 and the second pulley 218. The drive belt 217 is a loop belt with its two ends connected in the longitudinal direction. Therefore, the upper and lower parts of the drive belt 217 move in opposite directions in the vertical direction.

[0035] 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. Thus, when the transmission belt 217 moves, a pair of elevator hall doors 300, 300 move towards each other in a closing direction or towards each other in an opening direction via the first connecting member 222 and the second connecting member 223.

[0036] [Door locking mechanism]

[0037] The door locking mechanism 10 consists of a locking rod 11 and a fixing hook 15 that engages with the locking rod 11. The door locking mechanism 10 is located at the upper part of a pair of elevator hall doors 300, 300 in the vertical direction. The door locking mechanism 10 is a mechanism for locking the elevator hall doors 300, 300 when they are closed. The invention is characterized by having a door locking mechanism 10. Figure 2 This diagram shows a schematic structural diagram of the door locking mechanism 10 according to this embodiment. Figure 3 An enlarged view showing the main parts of the door locking mechanism 10 of this embodiment is shown.

[0038] The locking lever 11 is composed of a plate member having a bearing portion 13, a locking claw 12 provided on the front end side opposite to the bearing portion 13, and a connecting portion 14 connecting the bearing portion 13 and the locking claw 12. The bearing portion 13 is supported by a rotation shaft 20 of one of a pair of door hangers 221, allowing it to rotate. The connecting portion 14 extends from the bearing portion 13 toward the other door hanger 221. The locking claw 12 is provided on the front end side of the connecting portion 14 such that it protrudes toward the fixing hook portion 15 in the rotation direction. When the surface of the locking claw 12 on the rotation shaft 20 side engages with the fixing hook portion 15 (described later), it becomes a claw-side engagement surface 12a facing the engagement piece 16 of the fixing hook portion 15.

[0039] In this embodiment, the portion closest to the rotation axis 20 (in this embodiment, the front end portion of the engaging pawl 12) on the pawl-side engaging surface 12a of the engaging pawl 12 is referred to as the peak P. The locking lever 11 is supported so that it can rotate relative to the rotation axis 20, and therefore rotates relative to the fixed hook portion 15 in both the approaching and moving directions. The rotation trajectory of the peak P of the engaging pawl 12 in this case is as follows: Figure 3 As shown by the single-dot dashed line.

[0040] In this embodiment, the claw-side engagement surface 12a of the engaging claw 12 is formed by a concave curved surface, but it can also be formed by a flat surface, or by a convex curved surface protruding toward the rotation axis 20. It should be noted that when the claw-side engagement surface 12a is formed by a convex curved surface protruding toward the rotation axis 20, the peak P is not the front end of the engaging claw 12, but is the part closest to the rotation axis 20 in the convex curved surface.

[0041] The fixing hook 15 is fixed to the upper side of the elevator hall doors 300, 300 in the vertical direction to the inner wall of the elevator channel, or to the door hanger 221 of a pair of door hangers 221, 221 that is different from the side where the locking rod 11 is provided. The fixing hook 15 has a locking piece 16. The locking piece 16 is provided at the end of the fixing hook 15 on the side of the locking rod 11. The locking piece 16 protrudes upward in the vertical direction. The side of the locking piece 16 opposite to the end face on the side of the locking rod 11 becomes a single-sided locking surface 16a that engages with the locking claw 12 of the locking rod 11.

[0042] Furthermore, in this embodiment, the single-sided engagement surface 16a of the engagement piece 16 is formed by a curved surface, and its shape when viewed from a direction perpendicular to the rotation surface of the locking lever 11 (along the direction of the rotation axis 20) is configured to be the same as the rotation trajectory of the peak P of the engagement pawl 12. That is, the curved surface of the single-sided engagement surface 16a has a curvature with the distance from the center of the rotation axis 20 to the peak P as the radius of curvature. It should be noted that the rotation trajectory of the peak P of the engagement pawl 12 is determined by the distance from the center of the rotation axis 20 to the peak P.

[0043] 1-2. Operation of the door locking mechanism

[0044] Next, the operation of the door locking mechanism 10 will be explained. For example... Figure 1 As shown, when the elevator hall doors 300 and 300 are closed, the locking lever 11 rotates towards the fixed hook 15, and the engaging claw 12 of the locking lever 11 engages with the engaging piece 16 of the fixed hook 15, thereby locking the door locking mechanism 10. When unlocked, the locking lever 11 moves away from the fixed hook 15 (…). Figure 3 Rotate in the direction indicated by arrow O to unlock.

[0045] In this embodiment, the single-sided engagement surface 16a of the engagement piece 16 is configured to have the same shape as the rotation trajectory of the peak P of the claw-side engagement surface 12a of the engagement claw 12. Therefore, even when the gap between the peak P of the engagement claw 12 of the locking lever 11 and the single-sided engagement surface 16a of the engagement piece 16 of the fixing hook portion 15 is small or becomes zero, the rotation trajectory of the engagement claw 12 will not interfere with the engagement piece 16 when the locking lever 11 rotates.

[0046] 1-3. Comparative Examples

[0047] Figure 4 A conventional door locking mechanism 50 is shown as a comparative example. Figure 4 In this drawing, parts having the same structure as the door locking mechanism 10 of this embodiment are labeled with the same reference numerals, and repeated descriptions are omitted. Figure 4 As shown, in the conventional door locking mechanism 50, the structure of the fixing hook 51 differs from that of the fixing hook 15 in this embodiment. Figure 4 As shown, the single-sided engaging surface 52a of the engaging piece 52 of the conventional fixing hook 51 is composed of a planar shape extending in the vertical direction.

[0048] In addition, in the conventional door locking mechanism 50, such as Figure 4 As shown, when the engaging piece 52 engages with the engaging claw 12, a gap of about a few millimeters is provided between the claw-side engaging surface 12a of the engaging claw 12 of the rotating locking rod 11 and the single-side engaging surface 52a of the engaging piece 52 of the fixed hook portion 51. Therefore, the rotation trajectory of the locking rod 11 does not interfere with the engaging piece 52 of the fixed hook portion 51.

[0049] However, sometimes the closing force exerted on the elevator hall doors 300, 300 in the closing direction is insufficient, or due to external forces applied to the elevator hall doors 300, 300, the gap w between the single-sided engaging surface 52a and the claw-side engaging surface 12a becomes smaller than intended. In this case, in the conventional door locking mechanism 50, the engaging piece 52 of the fixed hook portion 51 is located on the rotation trajectory of the locking lever 11, and the engaging claw 12 interferes with the engaging piece 52, thus potentially making it impossible to unlock.

[0050] In contrast, in the door locking mechanism 10 of this embodiment, as described above, even if there is no gap between the single-sided engagement surface 16a and the claw-side engagement surface 12a, the engagement claw 12 and the engagement piece 16 will not interfere, thus preventing the undesirable situation of the lock not being unlocked.

[0051] Furthermore, in this embodiment, the single-sided engaging surface 16a has the same shape as the rotation trajectory of the locking lever 11, and the contact point between the peak P and the single-sided engaging surface 16a lies on the rotation trajectory of the locking lever 11. Therefore, even when the door opening force is applied to the elevator hall doors 300, 300 during locking, the door locking function will not be impaired because the unlocking torque is 0.

[0052] However, when closing the doors, a force (closing force) is applied to the elevator hall doors 300, 300 in the closing direction. In the conventional door locking mechanism 50 of the comparative example, a predetermined gap w is provided between the engaging piece 52 of the fixed hook 51 and the engaging pawl 12 of the locking lever 11 when the elevator hall doors 300, 300 are closed. With this gap w, the engaging pawl 12 of the locking lever 11 and the engaging piece 52 of the fixed hook 51 can unlock without interference. Therefore, if the closing force is weakened, and the gap w between the engaging pawl 12 of the locking lever 11 and the engaging piece 52 of the fixed hook 51 becomes smaller than the predetermined value, it may become impossible to unlock. Therefore, in the conventional door locking mechanism 50, it is not possible to set the closing force low.

[0053] In contrast, in the door locking mechanism 10 of this embodiment, even when the distance between the engaging claw 12 of the locking lever 11 and the engaging piece 52 of the fixing hook 51 becomes zero, it is possible to prevent the door from being unable to unlock. Therefore, in the elevator hall doors 300, 300, the closing force can be set to be lower, thereby reducing costs.

[0054] 2. Second Implementation Method

[0055] Next, the door locking mechanism of the second embodiment of the present invention will be described. Figure 5 This is an enlarged view of the main parts of the door locking mechanism 40 according to the second embodiment. Figure 5 In the middle, to and Figure 2The corresponding parts are labeled with the same reference numerals as those in the attached diagram, and repeated descriptions are omitted.

[0056] In the second embodiment, such as Figure 5 As shown, the pawl-side engagement surface 42a of the locking lever 41 has a concave curved surface when viewed from a direction perpendicular to the rotation plane. This curved surface is configured to have the same shape as the rotation trajectory of the peak P of the locking pawl 42. That is, the pawl-side engagement surface 42a and the single-sided engagement surface 16a are configured to engage without gaps, and are configured so that the locking pawl 42 and the engagement piece 16 do not interfere when the locking lever 41 rotates.

[0057] In this way, even if the shape of the pawl-side engaging surface 42a is set to be the same as the rotation trajectory of the peak P of the locking lever 41, the engaging pawl 42 and the engaging piece 16 will not interfere, thus preventing the lock from being unable to be unlocked.

[0058] In the first and second embodiments described above, a door locking mechanism for locking the elevator hall door at the entrance / exit of the elevator lobby was used as an example. However, the structure of the present invention can also be applied to a door locking mechanism for locking the car door at the boarding / alighting point of the elevator car.

[0059] The embodiments described above have been given in detail to facilitate understanding of the present invention, but are not necessarily limited to having all the described structures. For example, a part of the structure of the embodiments may be replaced with other structures, and other structures may be added to the structure of the embodiments. In addition, it is possible to add, delete, or replace other structures in a part of the structure of the embodiments.

[0060] Explanation of reference numerals in the attached figures:

[0061] 10…Door locking mechanism, 11…Locking rod, 12…Claw engaging, 12a…Claw side engaging surface, 13…Bearing part, 14…Connecting part, 15…Fixing hook part, 16…Claw engaging piece, 16a…Single-sided engaging surface, 20…Rotating shaft, 21…Door hanger, 100…Wait hall side door device, 200…Wait hall door opening and closing mechanism, 213…Wait hall side threshold, 215…Building side door guide rail, 216…First pulley, 217…Drive belt, 218…Second pulley, 221…Door hanger, 222…First connecting structural member, 223…Second connecting structural member, 224…Moving roller, 300…Wait hall door.

Claims

1. A door device for an elevator, wherein, The elevator door assembly has: The door is designed to move in the opening and closing direction; A locking lever, which is rotatably supported by a rotation axis of the door and has a locking pawl at its end opposite to the rotation axis; and The fixing hook has an engaging piece configured to engage with the engaging claw when the door is closed. The shape of the single-sided engagement surface of the engagement piece, which is opposite to the engagement claw, when viewed from the axial direction along the rotation axis, is configured to have the same rotation trajectory as the peak of the engagement claw located closest to the rotation axis.

2. The elevator door device according to claim 1, wherein, The shape of the claw-side engagement surface of the engagement claw, which is opposite to the single-sided engagement surface, when viewed from the axial direction along the rotation axis, is configured to have the same shape as the rotation trajectory of the peak.

3. The elevator door device according to claim 1, wherein, The locking rod rotates and moves, engaging with the engaging piece of the fixing hook from the upper side in the vertical direction.

4. An elevator, wherein, The elevator has the following features: An elevator car moves up and down within a lifting channel; as well as A door device having a door portion that can be opened and closed at the boarding / alighting point of the elevator car and / or at the entrance / exit of the waiting hall where the elevator car stops, and a door locking mechanism that can be unlocked to lock the door portion. The door locking mechanism has the following features: A locking lever, supported on one side of the door portion to allow rotation, and having a locking pawl at its end opposite to the axis of rotation; and The fixing hook has an engaging piece configured to engage with the engaging claw when the door is closed. The shape of the single-sided engagement surface of the engagement piece, which is opposite to the engagement claw, when viewed from the axial direction along the rotation axis, is configured to have the same rotation trajectory as the peak of the engagement claw located closest to the rotation axis.

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