Elevator Door Locking Device

Abstract

The present disclosure relates to an elevator door locking device, comprising: a case; a hook gear rotatably installed in the case and engaging a lock to maintain the door in a locked state; an unlocking gear rotatably mounted on the hook gear and guiding the lock engaged on the hook gear to move over the hook gear; a solenoid valve that operates to rotate the unlocking gear; a lock confirmation switch that operates by the movement of the lock to confirm the locking of the door; a switch operating gear that engages and rotates together with the lock confirmation switch when the hook gear rotates due to the movement of the lock, and contacts or is released from contact with the lock confirmation switch; and an elastic member that is respectively connected to the hook gear and the switch operating gear and returns the hook gear and the switch operating gear to their initial positions when the external force is removed.

Description

Technology Field

[0001] The present disclosure relates to an elevator door locking device. Background Technology

[0002] Elevator doors are designed to open and close only under certain conditions to ensure safety on the landing and inside the car, and door locking devices are applied for this purpose. Generally, elevator door locking devices operate by combining a mechanical hook mechanism and an electronic control system, and are configured to open the door only when specific conditions are met.

[0003] Conventional elevator door locking systems have primarily utilized simple latching structures or unlocking methods directly driven by solenoids. However, these methods carry the risk of problems such as mechanical wear, reduced locking reliability, and abnormal unlocking due to impact during prolonged use. In particular, some systems lack the capability to detect the operating status of the locking mechanism, making it difficult to verify in real-time whether the door is properly locked.

[0004] Furthermore, existing technologies have not sufficiently considered gear-based interlocking locking systems, and due to the simple actuation method of solenoids, there have been many cases where shock occurred during unlocking or the ability to stably maintain the locked state was insufficient. Accordingly, there is a growing need for gear-interlocking locking devices capable of maintaining a more stable and reliable lock and enabling smooth unlocking operations.

[0005] The information described above disclosed in the background technology of this invention is intended only to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art. The problem to be solved

[0006] The present invention relates to an elevator door lock designed to improve locking reliability and enable stable operation by optimizing the gear rotation structure in the elevator door lock.

[0007] In addition, the present invention relates to an elevator door locking device capable of performing door locking and unlocking operations more stably and reliably by linking gears and springs to mitigate shock occurring during the unlocking process and configuring the gears to return to their initial positions even after the external force is removed.

[0008] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems can be clearly understood by those skilled in the art from the description of the invention below. means of solving the problem

[0009] An exemplary elevator door locking device according to an embodiment of the present invention for solving the above technical problem may include: a case; a hook gear rotatably installed in the case and engaging a lock to maintain the door in a locked state; an unlocking gear rotatably mounted on the hook gear and guiding the lock engaged on the hook gear to move over the hook gear; a solenoid valve that operates to rotate the unlocking gear; a lock confirmation switch that operates by the movement of the lock to confirm that the door is locked; a switch operating gear that engages and rotates together with the lock confirmation switch when the hook gear rotates due to the movement of the lock, and contacts or is released from contact with the lock confirmation switch; and an elastic member that is respectively connected to the hook gear and the switch operating gear and returns the hook gear and the switch operating gear to their initial positions after the external force has been removed.

[0010] In some examples, the hook gear may include a first rotating body rotatably installed in a case, a first extension body extending from the first rotating body, a first side projection protruding from one side of the first extension body to support a solenoid valve, a second side projection spaced apart from the first side projection and protruding from one side of the first extension body to support a lock confirmation switch, and a hook member forming a projection protruding from the other side of the first extension body to the outside of the case and restricting the movement of a lock.

[0011] In some examples, the first side projection may include a first mounting projection that protrudes downward and is coupled with an elastic member.

[0012] In some examples, the unlocking gear may include a second rotating body rotatably installed on a first extension body, a connecting projection extending downward from the second rotating body and connected to a solenoid valve, and a guide projection extending upward from the second rotating body and formed at an angle along the protruding direction of a hook member.

[0013] In some examples, the connecting projection may be directly connected to the solenoid valve or indirectly connected to the solenoid valve through a connecting link.

[0014] In some examples, the switch operating gear may include a third rotating body rotatably connected to a rotation axis such as a first rotating body, a third connecting body extending upward from the third rotating body, a third side projection protruding from one side of the third connecting body and supported by an elastic member, a sensing projection protruding from the other side of the third connecting body and moved by a lock, and a switch operating cam extending in one direction from the upper side of the third connecting body and contacting or releasing contact with a lock confirmation switch by a rotational motion together with the third connecting body.

[0015] In some examples, a switch operating cam may be located on the upper side of the third side projection.

[0016] In some examples, the sensing protrusion can form a border with a curved shape.

[0017] In some examples, a sensing projection is located on the lower side of the hook member, and the sensing projection is moved by a lock that passes through the hook member and moves downward, so that the switch operating cam can be separated from the lock confirmation switch.

[0018] In some examples, the elastic member may include a first spring for the return of the hook gear and a second spring for the return of the switch operating gear.

[0019] In some examples, the first spring and the second spring may be formed as coil springs.

[0020] In some examples, the return speed of the hook gear and the switch operating gear can be controlled by the tension of the first spring and the second spring.

[0021] In some examples, the hook member may have a hook curved surface that guides the downward movement of the lock, with the cross-sectional area gradually increasing from the upper side to the lower side. Effects of the invention

[0022] According to the present invention, the locking and unlocking operations of the door can be performed stably through a structure in which a hook gear, an unlocking gear, and a switch operating gear are interlocked, thereby improving the safety of the elevator door.

[0023] In addition, according to the present invention, by driving the unlock gear using a solenoid valve, excessive impact during door unlocking can be prevented and a smooth unlocking operation can be implemented, thereby improving the durability of the locking device.

[0024] In addition, according to the present invention, by applying an elastic member to the hook gear and the switch operating gear, the gears can be configured to return to their original positions, thereby enabling stable locking even during repetitive operations and ensuring reliability even during long-term use.

[0025] In addition, according to the present invention, since the lock confirmation switch is configured to operate by detecting whether it is in contact with the lock, the locking state can be detected more accurately, enabling real-time monitoring in conjunction with an elevator system.

[0026] In addition, according to the present invention, since the gear and switch components can be configured to be placed within the case, internal parts can be protected from external shocks or contaminants, and the convenience of maintenance can be improved.

[0027] However, the effects obtainable through the present invention are not limited to those described above, and other unmentioned technical effects will be clearly understood by those skilled in the art from the description of the invention below. Brief explanation of the drawing

[0028] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a front view of an elevator door locking device according to one embodiment of the present invention. FIG. 2 is an elevator door locking device according to one embodiment of the present invention. FIG. 3 is an exploded front view of a hook gear, an unlock gear, and a switch operating gear according to one embodiment of the present invention. FIG. 4 is a front view illustrating the state before the lock is lowered according to one embodiment of the present invention. FIG. 5 is a front view illustrating the state in which a hook gear according to one embodiment of the present invention is rotated by being pushed by a lock. FIG. 6 is a front view illustrating a state in which a switch operating gear according to one embodiment of the present invention rotates while being pushed by a lock and is separated from a lock confirmation switch. FIG. 7 is a front view illustrating a rotated state of an unlocking gear according to one embodiment of the present invention. FIG. 8 is a front view illustrating a state in which an unlocking gear according to one embodiment of the present invention rotates while being pushed by a lock, and the upward movement of the lock is allowed. FIG. 9 is a front view illustrating a state in which a lock according to another embodiment of the present invention presses a switch operating gear. FIG. 10 is a front view illustrating a state in which a rotary lever according to another embodiment of the present invention is rotated toward a hook gear. FIG. 11 is a photograph showing a state in which a rotating lever is rotated toward a hook gear according to another embodiment of the present invention. FIG. 12 is a front view illustrating a state in which upward movement of the lock is allowed as the hook gear according to another embodiment of the present invention is pushed against the lock. Specific details for implementing the invention

[0029] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings. Instead, based on the principle that the inventor can appropriately define the concepts of terms to best describe their invention, they should be interpreted in a meaning and concept consistent with the technical spirit of the present invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention. It should be understood that various equivalents and modifications capable of replacing them may exist at the time of filing this application.

[0030] Additionally, as used herein, “comprise, include” and / or “comprising, including” specify the presence of the mentioned features, numbers, steps, actions, parts, elements, and / or groups thereof, and do not exclude the presence or addition of one or more other features, numbers, actions, parts, elements, and / or groups.

[0031] Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments.

[0032] The statement that two subjects of comparison are 'identical' means that they are 'substantially identical.' Therefore, substantial identity may include deviations considered low in the industry, for example, deviations within 5%. Additionally, the statement that a parameter is uniform in a given area may mean that it is uniform from an average perspective.

[0033] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0034] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0035] The fact that any configuration is placed on the “upper (or lower)” of a component or on the “upper (or lower)” of a component may mean not only that the any configuration is placed in contact with the upper (or lower) surface of said component, but also that another configuration may be interposed between said component and any configuration placed on (or below) said component.

[0036] Furthermore, where it is stated that one component is “connected,” “coupled,” or “joined” to another component, it should be understood that while said components may be directly connected or joined to each other, another component may be “interposed” between each component, or that each component may be “connected,” “coupled,” or “joined” through another component. Additionally, when it is stated that a part is electrically coupled with another part, this includes not only cases where they are directly connected but also cases where they are connected with an intermediate element in between.

[0037] Throughout the specification, “A and / or B” means A, B, or A and B unless specifically stated otherwise. That is, “and / or” includes any combination or any combination of the enumerated items. “C to D” means C or more and D or less, unless specifically stated otherwise.

[0038] The terms used in this specification are intended to describe embodiments of the present disclosure and are not intended to limit the present disclosure.

[0039] FIG. 1 is a front view of an elevator door locking device according to an embodiment of the present invention, FIG. 2 is an elevator door locking device according to an embodiment of the present invention, and FIG. 3 is an exploded front view of a hook gear (20), an unlock gear (40), and a switch operating gear (70) according to an embodiment of the present invention. As shown in FIG. 1 to FIG. 3, the elevator door locking device includes a case (10), a hook gear (20), an unlock gear (40), a solenoid valve (50), a lock confirmation switch (60), a switch operating gear (70), and an elastic member (80).

[0040] In the present invention, the vertical direction (z) is defined along the long side of the case (10), and the width direction (x) is defined along the short side of the case (10) that intersects perpendicularly with the vertical direction.

[0041] The present invention relates to an elevator door locking device (1) capable of performing the locking and unlocking operations of an elevator door more reliably and stably.

[0042] The elevator door locking device (1) according to the present invention includes a structure in which a hook gear (20), an unlocking gear (40), and a switch operating gear (70) are interlocked, thereby minimizing mechanical shock and ensuring smooth operation when the door is locked or unlocked.

[0043] The present invention also applies a method of driving the unlock gear (40) using a solenoid valve (50) and returning the hook gear (20) and the switch operating gear (70) to their original positions using spring elasticity, thereby enabling smoother locking and unlocking operations and preventing mechanical wear and malfunction even during long-term use.

[0044] According to the present invention, the lock confirmation switch (60) can be configured to operate by detecting contact with the lock (90) rather than whether the hook gear (20) rotates, so that the locking state of the door can be detected more accurately and monitored in real time.

[0045] In addition, the elevator door locking device (1) of the present invention can be designed so that each component can be placed within a protective cover, and can improve the convenience of maintenance by protecting internal parts from external impacts, dust, and contaminants.

[0046] The elevator door locking device (1) of the present invention can provide a more precise and stable locking function by utilizing a gear linkage structure while solving the problems that occur in conventional simple latching methods or direct solenoid driving methods.

[0047] Therefore, the present invention can be designed to enhance the safety and reliability of elevator doors and to be applicable in various environments.

[0048] The case (10) rotatably supports the hook gear (20), unlock gear (40), and switch operating gear (70) and is a key component forming the overall structure of the elevator door lock (1). The shape and arrangement of the case (10) can be varied to perform the function of the lock.

[0049] In some examples, the case (10) may be formed in a plate shape extending in the vertical direction and configured to accommodate a hook gear (20), an unlock gear (40), and a switch operating gear (70) inside. Additionally, some of the gears may be designed to protrude outward from the case (10) to ensure normal operation of the elevator door lock (1).

[0050] A lock (90) is positioned at the front of the case (10), and the lock (90) can be fixed at a certain position within the elevator shaft. As the elevator moves up and down, the elevator door lock (1) can come into contact with the lock (90) and operate. Through this structure, the lock (90) engages with the hook gear (20) to keep the door locked, or the door can be unlocked by the hook gear (20) rotating through contact with the lock (90).

[0051] Additionally, in some examples, the lock (90) may be formed in the shape of a horizontally extended rod and designed to engage with the hook gear (20) at a specific position. Accordingly, when the elevator door lock (1) comes into contact with the lock (90), the locking or unlocking operation can be performed automatically through the gear system.

[0052] Additionally, the case (10) may include a protective cover to prevent external impact and the intrusion of foreign matter, and may have an open structure in some areas to facilitate maintenance of internal components.

[0053] In this way, the case (10) of the present invention can be modified in various ways to stably support the main components of the elevator door locking device (1) and to perform the function of locking and unlocking the door by coming into contact with the lock (90) as the elevator moves.

[0054] The hook gear (20) is rotatably installed in the case (10) and is a key component that performs the function of keeping the door locked by engaging the lock (90). The hook gear (20) plays a role in ensuring the reliability of the elevator door lock (1) during the locking and unlocking process, and accordingly, various modifications are possible.

[0055] A hook gear (20) according to one embodiment of the present invention may include a first rotating body (22), a first extension body (24), a first side projection (26), a second side projection (30), and a hook member (32).

[0056] Additionally, in some examples, the hook gear (20) may be formed as a single rotating body, and multiple protrusions or reinforcing parts may be added.

[0057] The first rotating body (22) can be varied in various ways within the technical concept of being rotatably installed in the case (10). The first rotating body (22) can be rotatably installed in the case (10) by means of a screw or the like that forming a rotation axis.

[0058] In some examples, the first rotating body (22) may be formed as a rotating body in the shape of a circular disc, in which case smooth rotation can be enabled while ensuring the overall rigidity of the gear. Additionally, the first rotating body (22) may include a spoke structure for weight reduction, in which case sufficient rigidity can be maintained while reducing weight. Additionally, a bearing may be inserted into the first rotating body (22) on the rotating shaft, in which case friction can be minimized to increase durability and enable long-term use.

[0059] The first extension body (24) may extend upward from the first rotating body (22). Thus, the first extension body (24) may rotate clockwise or counterclockwise together with the first rotating body (22). In some examples, the first extension body (24) may be formed in a curved shape, in which case it may mitigate shock and enable smooth operation when the hook gear (20) rotates. In some examples, the first extension body (24) may be formed in a double-layer structure containing internal reinforcement, in which case it may increase rigidity and prevent deformation.

[0060] The first side projection (26) can be varied in various ways within the technical concept of protruding to one side of the first extension body (24) to support the solenoid valve (50).

[0061] In some examples, the first side projection (26) may be formed in an "L" shape, in which case it can directly support the solenoid valve (50) and mitigate external shock.

[0062] In some examples, the first side projection (26) may be formed with a structure capable of sliding connection, and in this case, it may have a variable structure to adjust the position of the solenoid valve (50).

[0063] The first side projection (26) may include a first mounting projection (28) that protrudes downward and is coupled with an elastic member (80).

[0064] In some examples, the first mounting projection (28) may be formed in an L-shape, in which case the rotation range of the hook gear (20) may be limited while facilitating connection with the spring. In some examples, the first mounting projection (28) may include a circular hole, in which case the spring may be easily connected so as to be combined with various elastic members (80).

[0065] The second side projection (30) is spaced apart from the first side projection (26) and can be varied in the technical concept of protruding to one side of the first extension body (24) to support the lock confirmation switch (60). The first side projection (26) may be located below the second side projection (30).

[0066] In some examples, the second side projection (30) may be formed as a flat protruding structure, in which case it may be easy to process with a simple structure and cost reduction may be possible.

[0067] In some examples, the second side projection (30) may be formed in a curved shape considering the rotational direction of the hook gear (20), in which case contact with the lock confirmation switch (60) can be made more stably.

[0068] The hook member (32) protrudes toward the outside of the case (10) from the other side of the first extension body (24), and various modifications are possible within the technical concept of forming a projection that restricts the movement of the lock (90).

[0069] A hook member (32) according to one embodiment of the present invention may include a hook curved portion (34) and a catch (36).

[0070] In some examples, the hook member (32) may be formed such that the hook curved portion (34) has a cross-sectional area that gradually increases from the upper side toward the lower side, and in this case, it can smoothly guide the downward movement of the lock (90).

[0071] The hook curved portion (34) can be formed in a roughly triangular shape, in which case the outer edge can form a curved surface to allow the lock (90) to move naturally.

[0072] The catch (36) may extend in a horizontal direction or form a concave curved groove and may be located on the lower side of the hook member (32).

[0073] In some examples, the stopper (36) may be formed as a horizontally extended projection, in which case it can physically block the movement of the lock (90).

[0074] In some examples, the catch (36) may be formed with a concave curved groove, in which case it can more stably support the lock (90) moving upward through the hook member (32).

[0075] The stopper (36) serves to restrain the lock (90) from moving at the lower side of the hook member (32), and can provide a stable locking function when the elevator door locking device (1), including the hook member (32), moves up and down together with the elevator.

[0076] For convenience of explanation, it may be described as if the lock (90) moves in an up-and-down direction, but in actual operation, the elevator door lock (1) moves up and down and makes contact with the lock (90).

[0077] The unlock gear (40) is rotatably mounted on the hook gear (20) and serves to guide the lock (90) engaged with the hook gear (20) to move over the hook gear (20). The unlock gear (40) is connected to a solenoid valve (50) and is rotated by the operation of the solenoid valve (50).

[0078] An unlocking gear (40) according to one embodiment of the present invention may include a second rotating body (42), a connecting projection (44), and a guide projection (46).

[0079] In some examples, a hook gear (20) is rotatably installed in the case (10), and an unlock gear (40) may be rotatably installed on the hook gear (20). Additionally, a switch operating gear (70) shares the same axis of rotation as the hook gear (20), and an unlock gear (40) may be located between the hook gear (20) and the switch operating gear (70).

[0080] In some examples, the unlock gear (40) may be machined so that the gear teeth mesh with the hook gear (20) to ensure a smooth unlocking operation.

[0081] Additionally, in some examples, the unlocking gear (40) may include an elastic element to mitigate impact, and a friction-reducing material may be applied so that the rotational force is maintained constant under certain conditions.

[0082] The second rotating body (42) is rotatably installed on the first extension body (24) and forms the central structure of the unlocking gear (40).

[0083] In some examples, the second rotating body (42) may be formed in the shape of a circular disc, which can enable smooth rotation while ensuring rigidity.

[0084] In some examples, the second rotating body (42) may include a spoke structure for weight reduction inside, in which case it can maintain sufficient rigidity while reducing unnecessary weight.

[0085] In some examples, a bearing may be inserted inside the rotating shaft, and in this case, it can be configured to minimize friction to be suitable for long-term use.

[0086] The connecting projection (44) extends downward from the second rotating body (42) and serves to connect to the solenoid valve (50). The connecting projection (44) is an important element that transmits the operating force of the solenoid valve (50) to the unlock gear (40) and can be modified in various ways.

[0087] In some examples, the connecting projection (44) can be directly connected to the solenoid valve (50) and can provide direct rotational force according to the operation of the solenoid.

[0088] In some examples, the connecting projection (44) may be indirectly connected to the solenoid valve (50) through the connecting link (52), in which case the position of the solenoid may be easily changed, making installation and maintenance convenient.

[0089] In some examples, the cross-section of the connecting projection (44) may be formed in a circular, square, or polygonal shape, and a rubber pad or high-friction surface treatment technology may be applied to prevent slipping when transmitting rotational force.

[0090] The guide projection (46) extends upward from the second rotating body (42) and can be formed at an angle along the protruding direction of the hook member (32).

[0091] In some examples, the guide projection (46) may be formed to be movable in the same direction as the hook member (32), and in this case, an inclined surface may be formed so that the lock (90) can ride over the hook member (32).

[0092] In some examples, the surface of the guide projection (46) may be coated with a special coating to control friction, for example, low-friction Teflon (PTFE) or high-friction silicone coating may be used.

[0093] In some examples, the guide projection (46) may be manufactured as a detachable structure and may be assembled by a screw fastening method so that replacement is easy in case of wear or deformation of the hook member (32).

[0094] When the unlock gear (40) is rotated counterclockwise by the operation of the solenoid valve (50), the guide projection (46) moves in the same direction as the hook member (32) to form an inclined surface over which the lock (90) can ride over the hook member (32). This minimizes impact during the unlocking process and allows for a smooth unlocking design.

[0095] The solenoid valve (50) can be varied in various ways within the technical concept of operating to rotate the unlock gear (40). In one embodiment of the present invention, the solenoid valve (50) is connected to the unlock gear (40), and can be configured so that the unlock gear (40) rotates according to the operation of the solenoid valve (50) so that the hook gear (20) can be released.

[0096] "The hook gear (20) is released" means that the locking state of the hook gear (20) is released so that the lock (90) can pass over the hook gear (20) by the movement of the switch operating gear (70). That is, when the hook gear (20) is in a locked state, the lock (90) is caught on the hook gear (20) and the door does not open, but when the solenoid valve (50) operates and the unlocking gear (40) rotates, the guide projection (46) of the unlocking gear (40) forms an inclined surface on the lower side of the hook member (32), so that the lock (90) can pass over the hook gear (20) through the inclined surface of the guide projection (46).

[0097] In some examples, the solenoid valve (50) can be attached directly to the unlock gear (40) and can unlock the hook gear (20) by rotating the gear through the operation of the electromagnetic coil.

[0098] In some examples, the solenoid valve (50) may be indirectly connected to the unlocking gear (40) through a connecting link (52), in which case the position of the solenoid valve (50) can be easily adjusted, thereby improving maintainability.

[0099] According to one embodiment of the present invention, the solenoid valve (50) can be modified into a fixed or rotary structure.

[0100] In some examples, the solenoid valve (50) is mounted directly on the hook gear (20) and can rotate together with the hook gear (20), in which case the release operation can be performed quickly while minimizing mechanical interference.

[0101] In some examples, the solenoid valve (50) may be positioned independently and may operate by moving linearly along a guide structure installed inside the case (10) to push the unlock gear (40).

[0102] The lock confirmation switch (60) is a switch that detects whether the door is locked by the movement of the lock (90).

[0103] According to one embodiment of the present invention, the lock confirmation switch (60) is normally pressed by the switch operating cam (78), and in this state, COM and NC (closed contact) remain in the OFF state.

[0104] When the lock (90) passes the hook gear (20) and presses the switch operating gear (70), causing the switch operating gear (70) to rotate clockwise, the lock confirmation switch (60) and the switch operating cam (78) are separated, so the contacts (COM, NC) of the lock confirmation switch (60) are changed to the ON state, and a signal can be output indicating that the door is properly locked.

[0105] In some examples, the lock confirmation switch (60) may rotate in engagement with the hook gear (20) or the switch operating gear (70), in which case a signal may be output according to the rotation angle of the hook gear (20).

[0106] In some examples, the lock confirmation switch (60) may be formed as a roller-type structure including a switch wheel, in which case mechanical wear may be reduced and operational reliability improved upon contact with the lock (90).

[0107] In some examples, the lock confirmation switch (60) may include an optical sensor or a magnetic sensor, in which case it can detect a change in the position of the hook gear (20) or the lock (90) without physical contact.

[0108] The lock confirmation switch (60) can be configured to monitor the lock status of the door in real time in conjunction with the elevator system and to accurately detect whether the door is open or closed through a signal.

[0109] Therefore, the lock confirmation switch (60) of the present invention reliably detects whether the door is normally locked and can improve the safety of the elevator system.

[0110] The switch operating gear (70) is a gear that rotates together with the hook gear (20) when the hook gear (20) rotates due to the movement of the lock (90), and performs the function of contacting or releasing contact with the lock confirmation switch (60). The switch operating gear (70) is a key component that detects changes in the position of the lock (90) to check whether the door is locked, and various modifications are possible within the technical concept.

[0111] A switch operating gear (70) according to one embodiment of the present invention may include a third rotating body (72), a third connecting body (74), a third side projection (76), a sensing projection (77), and a switch operating cam (78).

[0112] In some examples, the switch operating gear (70) shares the same axis of rotation as the hook gear (20) and may be designed to rotate in conjunction with the movement of the hook gear (20).

[0113] In some examples, the gear teeth of the switch operating gear (70) may be machined to mesh with the hook gear (20) and the unlock gear (40), in which case smooth operation may be possible while minimizing mechanical interference.

[0114] The third rotating body (72) is rotatably connected to the same rotation axis as the first rotating body (22) and is an element that forms the central structure of the switch operating gear (70).

[0115] In some examples, the third rotating body (72) may be formed in the shape of a circular disc, in which case it may enable smooth rotation while ensuring overall rigidity.

[0116] In some examples, the third rotating body (72) may include a spoke structure inside for weight reduction, in which case it can maintain sufficient rigidity while reducing unnecessary weight.

[0117] In some examples, a bearing may be inserted inside the rotating shaft, and in this case, it can be configured to minimize friction to be suitable for long-term use.

[0118] The third connecting body (74) extends upward from the third rotating body (72) and is an element that ensures mechanical continuity of the switch operating gear (70).

[0119] In some examples, the third connecting body (74) may be formed in a straight structure, in which case it may be easy to manufacture with a simple processing method and cost reduction may be possible.

[0120] In some examples, the third connecting body (74) may be formed in a curved shape to reduce interference with the hook gear (20) and the sensing projection (77), in which case smooth gear interlocking may be possible.

[0121] The third side projection (76) is an element that protrudes from one side of the third connecting body (74) and is supported by an elastic member (80).

[0122] In some examples, the third side projection (76) may be formed in an "L" shape, in which case it is easy to combine with the elastic member (80) and maintain a constant rotational force.

[0123] In some examples, the third side projection (76) may be machined into a circular protrusion shape, in which case the elastic member (80) may engage directly with the axis of rotation to enable a smooth return motion.

[0124] The sensing projection (77) protrudes to the other side of the third connecting body (74) and is an element that operates by the movement of the lock (90).

[0125] The sensing projection (77) can be located on the lower side of the hook member (32), and the sensing projection (77) can be moved by a lock (90) that moves downward through the hook member (32) so that the switch operating cam (78) can be separated from the lock confirmation switch (60).

[0126] In some examples, the sensing projection (77) may have a curved edge, which can reduce friction and enable smooth movement when in contact with the lock (90).

[0127] In some examples, the cross-section of the sensing projection (77) may be formed in a circular, square, or polygonal shape, and a limiting projection may be added to maintain a constant rotation angle under certain conditions.

[0128] In some examples, the material of the sensing protrusion (77) may be rubber or silicone coated, in which case it can cushion the impact and reduce noise.

[0129] The switch operating cam (78) extends in one direction from the upper side of the third connecting body (74) and is an element that rotates together with the third connecting body (74).

[0130] The switch operating cam (78) serves to make contact with or release contact with the lock confirmation switch (60), and various variations are possible within the technical concept.

[0131] It is located on the upper side of the third side projection (76), and can control whether it makes contact with the switch according to the rotation of the switch operating gear (70).

[0132] In some examples, the switch operating cam (78) can be formed as a flat structure, in which case it can be easily processed and contact reliability can be increased.

[0133] In some examples, the switch operating cam (78) may include a curved structure, in which case the switch contact may be gradually made upon rotation to mitigate the impact.

[0134] In some examples, the surface of the switch operating cam (78) may be coated with a low-friction coating, which can reduce friction with the switch and improve durability.

[0135] The elastic member (80) is connected to the hook gear (20) and the switch operating gear (70), respectively, and is an element that returns the two gears to their initial positions after the external force is removed. The elastic member (80) can be designed to ensure stable operation of the gears during the locking and unlocking process and to provide a consistent return force even with continuous use.

[0136] An elastic member (80) according to one embodiment of the present invention may include a first spring (82) for the return of a hook gear (20) and a second spring (84) for the return of a switch operating gear (70).

[0137] In some examples, the elastic member (80) may be designed to adjust the return speed according to the magnitude of the external force, and the rotational characteristics of the gear may vary depending on the tension of each spring.

[0138] The first spring (82) is responsible for the return of the hook gear (20) and is an element that allows the hook gear (20) to return to its original locked position after rotation.

[0139] In some examples, the first spring (82) may be formed as a coil spring, in which case it may provide a constant elastic force to enable a smooth return motion.

[0140] In some examples, the first spring (82) may be modified into a leaf spring or a torsion spring, in which case it may provide a higher return force at a specific angle of rotation.

[0141] In some examples, an adjustment screw may be included to adjust the tension of the first spring (82), thereby allowing the return speed to be finely adjusted according to the usage environment.

[0142] The second spring (84) is responsible for the return of the switch operating gear (70) and serves to allow the gear to return to its original position when necessary while maintaining contact with the switch.

[0143] In some examples, the second spring (84) may be formed as a coil spring, in which case it may provide a balanced return motion when coupled with the hook gear (20).

[0144] In some examples, the second spring (84) may be formed as a wire spring, in which case it can provide sufficient elasticity while saving space.

[0145] In some examples, the second spring (84) may be replaced with an elastic material made of rubber or silicone, in which case the durability may be increased by adding a shock absorption function.

[0146] Additionally, in some examples, the return speed of the hook gear (20) and the switch operating gear (70) can be adjusted by adjusting the tension of the first spring (82) and the second spring (84), thereby optimizing the responsiveness of the door lock.

[0147] The lock (90) is a key element that determines the locking and unlocking of the elevator door, and can be engaged with the hook gear (20) to keep the door locked or unlocked by the operation of the unlock gear (40).

[0148] In some examples, the lock (90) may be formed in the shape of a horizontally extended rod, in which case it may facilitate contact with the elevator door lock (1).

[0149] In some examples, the lock (90) may be configured to be rotatable, in which case the contact state with the hook gear (20) can be optimized while maintaining a constant clearance when opening and closing the door.

[0150] In some examples, the lock (90) may have a rubber or polyurethane coating applied to its surface for shock absorption, which can improve durability while reducing noise.

[0151] Additionally, in some examples, the lock (90) may include an adjustable spring mechanism to adjust the engagement force with the hook gear (20), thereby allowing the lock strength to be adjusted to suit various requirements of the elevator system.

[0152] FIG. 4 is a front view illustrating the state before the lock (90) according to one embodiment of the present invention is lowered. As shown in FIG. 4, the lock (90) is positioned on the upper side of the hook member (32), and the lock (90) is in an initial state where it is not locked.

[0153] In this state, the lock (90) does not come into contact with the sensing projection (77) of the switch operating gear (70), and the switch operating gear (70) maintains its initial position.

[0154] Accordingly, the switch operating cam (78) of the switch operating gear (70) remains in contact with the lock confirmation switch (60), and the lock confirmation switch (60) is in a non-operating state.

[0155] FIG. 5 is a front view illustrating a state in which a hook gear (20) according to an embodiment of the present invention is rotated by being pushed by a lock (90). As shown in FIG. 5, when the lock (90) presses the hook member (32) while descending, the hook gear (20) rotates around the first rotating body (22).

[0156] At this time, the unlock gear (40) and the switch operating gear (70) engaged with the hook gear (20) also rotate clockwise together with the hook gear (20).

[0157] Accordingly, the switch operating cam (78) of the switch operating gear (70) continues to remain in contact with the lock confirmation switch (60).

[0158] FIG. 6 is a front view illustrating a state in which a switch operating gear (70) according to an embodiment of the present invention is rotated by being pushed by a lock (90) and is separated from a lock confirmation switch (60). As shown in FIG. 6, as the lock (90) moves to the lower side of the hook member (32), it presses the sensing projection (77) of the switch operating gear (70).

[0159] During this process, the hook gear (20) returns to its initial position by the elastic force of the elastic member (80), and accordingly, a state is formed in which the switch operating cam (78) mounted on the hook gear (20) and the lock confirmation switch (60) are separated. As a result, the lock confirmation switch (60) outputs a signal, and it is possible to detect that the door is in a locked state.

[0160] FIG. 7 is a front view illustrating a rotated state of an unlock gear (40) according to one embodiment of the present invention. As shown in FIG. 7, the unlock gear (40) rotates counterclockwise as the solenoid valve (50) operates.

[0161] At this time, the guide projection (46) of the unlock gear (40) protrudes outward from the case (10), forming an inclined surface so that the lock (90) can ride over the hook member (32). Through this, the lock (90) moves smoothly along the hook member (32), and the door is switched to a state where it can be unlocked.

[0162] FIG. 8 is a front view illustrating a state in which an unlocking gear (40) according to an embodiment of the present invention rotates by being pushed by a lock (90), and upward movement of the lock (90) is allowed. As shown in FIG. 8, the lock (90) moves upward while pressing the hook member (32) through the guide projection (46).

[0163] In this process, the lock (90) is separated from the switch operating gear (70), so the switch operating gear (70) returns to a counterclockwise direction by the elastic force of the elastic member (80). As a result, the switch operating cam (78) comes into contact with the lock confirmation switch (60) again, and a signal can be output that the door has been successfully unlocked.

[0164] FIG. 9 is a front view illustrating a state in which a lock (100) according to another embodiment of the present invention presses a switch operating gear (70). As shown in FIG. 9, the lock (100) according to another embodiment of the present invention provides a structure that allows the lock to be manually unlocked even in the event of a failure of the solenoid valve (50).

[0165] In this embodiment, the lock (100) may include a movable body (102) that can move up and down along the case (10), and a rotating lever (105) rotatably installed on the movable body (102). The rotating lever (105) is rotated by an external force in an emergency and performs the function of releasing the locked state of the hook gear (20) by pressing the hook gear (20).

[0166] In some examples, in an emergency situation, the operator can unlock the lock (100) by operating the operation switch, and the operation switch can unlock the hook gear (20) by rotating the rotary lever (105) through the power transmission unit (110).

[0167] In some examples, a handle or lever device may be added to the rotary lever (105) to facilitate a smoother manual release operation, and the design may be made so that the operator can easily operate it.

[0168] The movable body (102) is positioned on the side of the case (10) and can be configured to be movable in the up and down direction. The movable body (102) may be formed in a plate shape extending in the up and down direction to ensure rigidity and may include a support bracket (103).

[0169] In some examples, the movable body (102) may be made of aluminum or steel alloy, in which case the weight can be reduced while maintaining high durability.

[0170] A rotation lever (105) may be rotatably installed on a support bracket (103) provided on a movable body (102). The rotation lever (105) is fixed to a transmission shaft (116) connected to the support bracket (103) and has a structure that rotates together with the transmission shaft (116).

[0171] The rotary lever (105) may include an inclined surface and is folded toward the moving body (102) when the solenoid valve (50) is operating normally, so as not to affect the hook gear (20).

[0172] In some examples, the rotating lever (105) may include a limiting projection to rotate only at a specific position, thereby preventing unnecessary movement. In some examples, the rotating lever (105) may be made of carbon steel or reinforced plastic to ensure rigidity and durability, in which case lightweighting and enhanced durability can be achieved simultaneously.

[0173] FIG. 10 is a front view showing a state in which a rotating lever (105) according to another embodiment of the present invention is rotated toward a hook gear (20), and FIG. 11 is a photograph showing a state in which a rotating lever (105) according to another embodiment of the present invention is rotated toward a hook gear (20).

[0174] As illustrated in FIGS. 10 and 11, when the hook gear (20) is manually unlocked in an emergency situation, the rotation lever (105) is rotated through the power transmission unit (110).

[0175] The power transmission unit (110) is composed of a gear and a shaft that transmit the force of rotation of the rotary lever (105) and may include the following elements. The first gear (112) is a gear that rotates by the rotation of the rotary lever (105). The second gear (114) is a gear that meshes with the first gear (112) and transmits power in an orthogonal direction. The transmission shaft (116) connects the second gear (114) and the rotary lever (105) and may be rotatably installed on a support bracket (103).

[0176] In some examples, the first gear (112) and the second gear (114) may be made of metal or high-durability plastic, in which case wear may be prevented even with long-term use.

[0177] In some examples, the transmission shaft (116) may be manufactured with a structure that includes a bearing, in which case friction may be minimized to enable smoother rotation.

[0178] In some examples, a multi-stage gear structure may be applied so that the rotational speed of the rotary lever (105) can be adjusted by adjusting the gear ratio.

[0179] FIG. 12 is a front view illustrating a state in which a hook gear (20) according to another embodiment of the present invention is pushed by a lock (100), allowing the lock (100) to move upward. As shown in FIG. 12, a state is formed in which a rotating lever (105) rotates upward to the position where the hook gear (20) is located and comes into contact with the hook gear (20). In this state, as the lock (100) containing the rotating lever (105) moves upward, the rotating lever (105), which includes an inclined surface, presses the hook gear (20) to rotate it clockwise. During this process, as the hook gear (20) rotates, the lock (100) is released so as not to be constrained, and finally, the lock of the hook gear (20) can be manually released.

[0180] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0181] 1: Elevator door lock 10: Case 20: Hook Gear 22: First rotating body 24: First extension body 26: First side projection 28: First mounting projection 30: Second lateral projection 32: Hook member 34: Hook curved surface 36: Catching tab 40: Unlock Gear 42: Second rotating body 44: Connecting projection 46: Guide projection 50: Solenoid valve 52: Connecting link 60: Lock confirmation switch 70: Switch operating gear 72: Third rotating body 74: Third connecting body 76: Third side projection 77: Sensing projection 78: Switch operating cam 80: Elastic member 82: First spring 84: Second spring 90: Lock 100: Lock 102: Movable body 103: Support bracket 105: Rotating lever 110: Power transmission unit 112: 1st gear 114: 2nd gear 116: Transmission shaft

Claims

Claim 1 An elevator door locking device comprising: a case; a hook gear rotatably installed in the case and engaging a lock to keep the door in a locked state; an unlocking gear rotatably mounted on the hook gear and guiding the lock engaged on the hook gear to move over the hook gear; a solenoid valve that operates to rotate the unlocking gear; a lock confirmation switch that operates by the movement of the lock to confirm the locking of the door; a switch operating gear that engages and rotates together with the hook gear when the hook gear rotates due to the movement of the lock, and contacts or disengages from the lock confirmation switch; and an elastic member connected to the hook gear and the switch operating gear, respectively, and returning the hook gear and the switch operating gear to their initial positions when the external force is removed. Claim 2 An elevator door locking device according to claim 1, wherein the hook gear comprises: a first rotating body rotatably installed in the case; a first extension body extending from the first rotating body; a first side projection protruding from one side of the first extension body to support the solenoid valve; a second side projection spaced apart from the first side projection and protruding from one side of the first extension body to support the lock confirmation switch; and a hook member protruding from the other side of the first extension body to the outside of the case and forming a projection that restricts the movement of the lock. Claim 3 An elevator door locking device according to claim 2, characterized in that the first side projection protrudes downward and includes a first mounting projection that is coupled with the elastic member. Claim 4 An elevator door locking device according to paragraph 2, wherein the unlocking gear comprises: a second rotating body rotatably installed on the first extension body; a connecting projection extending downward from the second rotating body and connected to the solenoid valve; and a guide projection extending upward from the second rotating body and formed inclined along the protruding direction of the hook member. Claim 5 An elevator door locking device according to claim 4, characterized in that the connecting projection is directly connected to the solenoid valve or indirectly connected to the solenoid valve through a connecting link. Claim 6 In paragraph 2, the switch operating gear comprises: a third rotating body rotatably connected to a rotation axis the same as the first rotating body; a third connecting body extending upward from the third rotating body; a third side projection protruding from one side of the third connecting body and supported by the elastic member; a sensing projection protruding from the other side of the third connecting body and moved by the lock; and a switch operating cam extending in one direction from the upper side of the third connecting body and contacting or releasing contact with the lock confirmation switch by a rotational operation together with the third connecting body; an elevator door locking device.

Images