Elevator and its door blade device

Abstract

The present application belongs to elevator technical field, more specifically, it is related to a kind of elevator and its door knife device. Wherein, door knife device includes anti-pinch component, and anti-pinch component includes detection sensor and trigger piece, at least one of detection sensor and trigger piece is linked with door knife mechanism, when the resistance that door knife mechanism holds layer door ball moves exceeds preset value, trigger piece triggers detection sensor. When the gap between car door and layer door, the gap between layer door and door sleeve is stuck into foreign matter, detection sensor is triggered, and elevator opening action stops, so, to the anti-pinch component of door knife device integrated setting, it can avoid the influence of elevator normal opening due to foreign matter being stuck into gap, avoid to cause damage to the object being stuck, provide reliable guarantee for the safe operation of elevator;And, the triggering of detection sensor is realized by linkage with door knife mechanism, without adding other driving structure, and the overall structure of door knife device is simple, maintenance is convenient, with higher use value.

Description

Technical Field

[0001] This invention belongs to the field of elevator technology, and more specifically, relates to an elevator and its door knife device. Background Technology

[0002] An elevator typically includes a car housed within an elevator shaft. The car can move vertically within the elevator shaft along a predetermined path. The elevator shaft is equipped with landing doors corresponding to each elevator stop. When the elevator arrives at a stop, the landing doors are linked to the elevator car doors to open the elevator.

[0003] Generally, in order for elevator doors to open and close smoothly, a certain gap must be maintained between the car door and the landing door, and between the landing door and the door frame. During the elevator door opening process, foreign objects may get stuck in this gap. On the one hand, foreign objects stuck in the gap will affect the normal opening of the elevator door. On the other hand, if a passenger's fingers or other parts get stuck, and the opening action cannot be stopped in time, it may also cause injury to the passenger and lead to a safety accident. Summary of the Invention

[0004] The main objective of this invention is to provide an elevator and its door knife device to solve the technical problem in the prior art where foreign objects get stuck in the gap between the car door and the landing door, and / or in the gap between the landing door and the door frame, which affects the normal opening of the elevator and may even cause safety accidents.

[0005] The technical solution adopted in this invention is: to provide a door knife device, comprising:

[0006] Base plate;

[0007] The door knife mechanism is mounted on the base plate and is used to clamp the floor ball under the drive of the door operator;

[0008] The door lock assembly is installed on the base plate and linked to the door knife mechanism. The door lock assembly can switch between the locked state and the unlocked state, and the door lock assembly is in the unlocked state when the door knife mechanism clamps the door ball.

[0009] The anti-pinch component includes a detection sensor and a trigger, at least one of which is linked to the door knife mechanism, and the trigger activates the detection sensor when the resistance encountered by the door knife mechanism when the door ball moves in the clamping layer exceeds a preset value.

[0010] In some embodiments, the door knife mechanism includes a drive arm connected to the door operator, and a left knife arm and a right knife arm linked to the drive arm. The left knife arm and the right knife arm are arranged parallel to each other on the base plate. The left knife arm and the right knife arm cooperate to clamp the door ball. One of the detection sensors and the trigger is linked to the left knife arm or the right knife arm.

[0011] In some embodiments, the door knife mechanism further includes an upper linkage and a lower linkage. The upper linkage, the left knife arm, the lower linkage, and the right knife arm constitute a four-bar linkage mechanism. The drive arm is connected to the upper linkage, and the detection sensor and / or trigger are installed on the lower linkage.

[0012] In some embodiments, the middle part of the upper linkage and the middle part of the lower linkage are respectively hinged to the base plate, the upper end of the left cutter arm is hinged to the first end of the upper linkage, the lower end of the left cutter arm is hinged to the first end of the lower linkage, the upper end of the right cutter arm is hinged to the second end of the upper linkage, the lower end of the right cutter arm is hinged to the second end of the lower linkage, and a detection sensor and / or trigger is installed at the second end of the lower linkage.

[0013] In some embodiments, the detection sensor is mounted on the second end of the lower linkage member, and the trigger member is mounted on the base plate; or, the trigger member is mounted on the second end of the lower linkage member, and the detection sensor is mounted on the base plate.

[0014] In some embodiments, a detection sensor is mounted on the second end of the lower linkage member, and the door knife mechanism further includes a micro actuator hinged to the second end of the lower linkage member. The right knife arm is hinged to the micro actuator via a limiting shaft. The detection sensor is located on the side of the end of the limiting shaft away from the right knife arm, and the end of the limiting shaft away from the right knife arm forms a trigger.

[0015] In some embodiments, the detection sensor is located on the side of the lower linkage member facing away from the right cutter arm. The lower linkage member is provided with a limit hole, and the end of the limit shaft facing away from the right cutter arm passes through the limit hole. The limit shaft can move within the limit hole to trigger the detection sensor.

[0016] In some embodiments, the detection sensor is a force sensor, a contact sensor, or a distance sensor.

[0017] In some embodiments, the door lock assembly includes a lock hook that is linked to the upper linkage member. The lock hook is hinged to the base plate and has a lock hook for mating with a door lock seat installed on the car door. When the door knife mechanism clamps the door ball, the lock hook disengages from the door lock seat and is in an unlocked state.

[0018] In some embodiments, the door lock assembly further includes an unlocking member having a connecting arm and a pressing arm connected to the connecting arm, one end of the connecting arm away from the pressing arm being hinged to a second end of the upper linkage member, the right blade arm being hinged to the other end of the connecting arm, and the pressing arm abutting against the lock hook member.

[0019] In some embodiments, the surface of the pressing arm that contacts the locking hook is a convex arc surface, and a roller is mounted on the locking hook arm, with the pressing arm abutting against the outer ring of the roller.

[0020] Alternatively, both the surfaces of the pressing arm and the locking hook that contact each other, as well as the surfaces of the locking hook and the pressing arm, are convex arc surfaces.

[0021] The door knife device provided in this invention has at least one of the following technical effects: The electric door knife device of this invention is equipped with an anti-pinch assembly including a detection sensor and a trigger, wherein at least one of the detection sensor and the trigger is linked to the door knife mechanism that clamps the landing door ball. Thus, when a foreign object gets stuck in the gap between the car door and the landing door and / or the gap between the landing door and the door frame, the movement of the landing door is hindered, the resistance to the landing door movement increases, and the resistance encountered by the door knife mechanism when clamping the landing door ball increases. When the resistance increases to a preset value exceeding the clamping force of the door knife mechanism when clamping the landing door during normal opening, the trigger will activate the detection sensor, stopping the door opening action, thereby preventing foreign objects from being brought in and causing operational damage to items stuck in the gap. In this way, by integrating an anti-pinch component into the door knife device, it is possible to effectively prevent the elevator from opening normally due to foreign objects getting stuck in the gap, thus avoiding damage to the stuck objects and providing a more reliable guarantee for the safe operation of the elevator. On the other hand, the anti-pinch component moves with the elevator car, and its action and function can be performed normally when the elevator reaches any floor door. Integrating one set of anti-pinch components into the door knife device can ensure that the elevator can effectively prevent pinching when opening the door at any stop. Moreover, the triggering of the detection sensor is achieved through linkage with the door knife mechanism, without the need to add other drive structures. The overall structure of the door knife device is simple, easy to disassemble, install, and maintain, and has high practical value.

[0022] Another technical solution of the present invention is to provide an elevator, including the above-mentioned door knife device.

[0023] The elevator provided in this invention has at least one of the following technical effects: In the elevator of this invention, by using the aforementioned door knife device, the anti-pinch component moves with the elevator car. When the elevator reaches any floor door, the action and function of the anti-pinch component can be performed normally. It is not necessary to install an anti-pinch device at each landing floor. The installation of the anti-pinch component does not increase the complexity of the overall elevator mechanism or the installation difficulty. Furthermore, since the anti-pinch component is located between the elevator landing door and the car door, it is not easy for passengers and items to approach it, and there will be no situation where the elevator stops abnormally due to accidental triggering. The overall performance of the elevator system is improved, and the safety of use is higher. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a schematic diagram of the structure of a door knife device provided in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the door knife device from another perspective;

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 for Figure 1 A partial structural schematic diagram of the door knife device is shown;

[0029] Figure 5 for Figure 1 Another partial structural schematic diagram of the door knife device shown;

[0030] Figure 6 for Figure 1 The diagram shows the structure of the unlocking component of the door lock assembly of the door knife device.

[0031] In the figure, the main labels of each attached figure are:

[0032] 10. Base plate; 11. Notch;

[0033] 20. Door knife mechanism; 21. Drive arm; 22. Left knife arm; 23. Right knife arm; 24. Upper linkage component; 241. Support arm; 242. First end of the upper linkage component; 243. Second end of the upper linkage component; 25. Lower linkage component; 251. Limiting hole; 252. Mounting arm; 253. First end of the lower linkage component; 254. Second end of the lower linkage component; 26. Micro-motion component; 261. Limiting shaft; 262. First end of the micro-motion component; 263. Second end of the micro-motion component;

[0034] 30. Door lock assembly; 31. Lock hook assembly; 311. Lock hook; 312. Roller; 32. Unlocking component; 321. Connecting arm; 322. Pressing arm; 33. Spring;

[0035] 40. Anti-pinch assembly; 41. Trigger; 42. Detection sensor; 421. Fixing bracket; 422. Rubber pad; 423. Ejector pin; 424. Electrical module. Detailed Implementation

[0036] To make the technical problem to be solved, the technical solution and the beneficial effects of the present invention clearer, the following description is provided in conjunction with the appendix. Figures 1 to 6 The present invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0037] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0038] The terms “length”, “width”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may explicitly or implicitly include one or more of that feature, while "multiple" means two or more.

[0040] In this specification, references to "one embodiment," "some embodiments," or "embodiment" mean that one or more embodiments of the invention include a particular feature, structure, or characteristic described in connection with that embodiment. The phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. In one or more embodiments, particular features, structures, or characteristics may be combined in any suitable manner.

[0041] An elevator typically consists of a car housed within an elevator shaft. The car moves vertically along a predetermined path within the shaft. Each floor has a landing door. When the elevator reaches a floor, the car door and landing door open in tandem. Generally, to ensure smooth opening and closing of the landing doors, a certain gap must be maintained between the car door and landing door, and between the landing door and the door frame. During the door opening process, foreign objects may get caught in these gaps. On one hand, foreign objects stuck in the gaps can hinder the normal opening of the elevator doors. On the other hand, if a passenger's limbs, such as fingers, become trapped, and the opening process cannot be stopped in time, it could lead to injury and a safety accident.

[0042] In related technologies, to ensure smooth opening and closing of landing doors and prevent injury to passengers when the doors open, anti-pinch devices are typically installed on the front wall of the car or the door frame. The front wall and door frame are designed as movable structures. When a foreign object, such as a hand, gets caught in the gap, the anti-pinch device is activated. Upon activation, the car door closes again, pulling the object out of the gap. After the object is removed, the car door reopens. In actual use, this anti-pinch device needs to be installed at each landing. This makes the elevator system more complex and increases installation difficulty. Furthermore, the location of the anti-pinch device is easily accessible to passengers, making it prone to accidental activation. In severe cases, this could lead to abnormal elevator stops, endangering passenger safety.

[0043] Based on this, such as Figures 1 to 6 As shown, this embodiment of the invention provides a door knife device. By integrating an anti-pinch component into the door knife device, it avoids elevator door opening failure caused by foreign objects getting stuck in the gap between the car door and the landing door and / or the gap between the landing door and the door frame, and avoids safety accidents caused thereby.

[0044] Please see Figures 1 to 3 ,in, Figure 1 This is a schematic diagram of the structure of a door knife device according to an embodiment of the present invention. Figure 2 for Figure 1 The diagram shows another perspective of the door knife device. Figure 3 for Figure 2 An enlarged schematic diagram at point A. The following description, in conjunction with the accompanying drawings, provides a detailed explanation of the door knife device provided by this invention.

[0045] like Figures 1 to 3 As shown, an embodiment of the present invention provides a door knife device that is suitable for use in conjunction with a door operator (not shown) installed on an elevator car to drive the landing door to open together with the car door.

[0046] In this embodiment, the door knife device includes a base plate 10, a door knife mechanism 20, and a door lock assembly 30. The base plate 10 is a supporting component of the door knife device, and the door knife mechanism 20 is mounted on the base plate 10 and connected to the door operator drive. In actual use, the base plate 10 is fixed to the car door and can move with the car door. During the elevator door opening process, the door knife mechanism 20 clamps the landing door ball (not shown) set on the landing door and moves synchronously with the base plate 10 and the car door under the drive of the door operator, thereby driving the landing door to move with the car door, so that the landing door can open or close together with the car door.

[0047] Furthermore, such as Figures 1 to 3As shown, the door lock assembly 30 is also installed on the base plate 10 and linked with the door knife mechanism 20. In actual use, a door lock seat is installed on the door operator base plate, and a door knife device is installed on the car door leaf. The door lock assembly 30 is paired with the door lock seat (not shown). When the door lock assembly 30 is locked to the door lock seat, that is, when the door lock assembly 30 is in the locked state, the two doors of the car door are closed, and the car door is in the closed state. When the door lock assembly 30 is opened relative to the door lock seat, that is, when the door lock assembly 30 is in the unlocked state, such as... Figure 1 As shown, the two doors of the car door can move away from each other to open the car door or move closer to each other to close the car door. At the same time as the car door opens or closes, the door operator drives the door knife mechanism 20 to clamp the landing door ball, so that the landing door can open or close together with the car door.

[0048] In this embodiment, as Figures 1 to 3 As shown, the door knife device also includes an anti-pinch component 40, which includes a detection sensor 42 and a trigger 41. The detection sensor 42 is triggered by the trigger 41 when a foreign object gets stuck in the gap between the car door and the landing door and / or the gap between the landing door and the door frame, thereby stopping the elevator's door opening action. In practical use, the detection sensor 42 can be connected to the door operator. When the detection sensor 42 is triggered by the trigger 41, the door operator stops its driving action, the elevator stops opening the door, and the door operator can also control the door operator to reverse its action after receiving the information that the detection sensor 42 has been triggered, driving the elevator to close the door again and thus bringing out the object stuck in the gap in the opposite direction.

[0049] In this embodiment, as Figures 1 to 3 As shown, at least one of the detection sensor 42 and the trigger 41 is linked to the door knife mechanism 20. For example, the detection sensor 42 is linked to the door knife mechanism 20, or the trigger 41 is linked to the door knife mechanism 20, or both the detection sensor 42 and the trigger 41 are linked to the door knife mechanism 20. When the resistance encountered by the door knife mechanism 20 when the clamping layer door ball moves exceeds a preset value, the trigger 41 triggers the detection sensor 42.

[0050] Specifically, when the elevator doors open normally, the door knife mechanism 20 clamps the landing door ball under the drive of the door operator, and the landing door opens in conjunction with the car door. During normal door opening, since the resistance to the movement of the landing door can be calculated through design (i.e., the aforementioned "preset value" is the resistance encountered by the door knife mechanism 20 when clamping the landing door ball during the normal movement of the landing door), the door knife mechanism 20 can drive the landing door to move by clamping the landing door ball at a preset value equal to the resistance to the movement of the landing door, thus smoothly driving the landing door to open together with the car door. However, when foreign objects get stuck in the gap between the car door and the landing door and / or the gap between the landing door and the door frame, the movement of the landing door is hindered. At this time, the resistance to the movement of the landing door increases, and the resistance encountered by the door knife mechanism 20 when clamping the landing door ball increases. When the resistance increases to exceed the preset value of the resistance encountered by the door knife mechanism 20 when clamping the landing door during normal door opening, the trigger 41 will trigger the detection sensor 42, thereby stopping the door opening action and preventing foreign objects from being brought into the gap.

[0051] Understandably, when there is a foreign object in the gap, the resistance to movement of the landing door relative to the car door increases instantaneously. At this time, due to inertia, the resistance to the movement of the landing door ball held by the door knife mechanism 20 increases instantaneously and quickly exceeds the preset value. The trigger 41 can quickly trigger the detection sensor 42, thereby ensuring that the foreign object is triggered the moment it is clamped in the gap, reducing the trigger delay, and effectively avoiding damage to the clamping gap caused by the delayed triggering of the detection sensor 42.

[0052] The electric door knife device of the present invention, by integrating an anti-pinch component 40 into the door knife device, can effectively prevent the normal opening of the elevator door from being affected by foreign objects being caught in the gap, and avoid damage to the caught objects, thus providing a more reliable guarantee for the safe operation of the elevator. Furthermore, the anti-pinch component 40 moves with the elevator car, and its operation and function can be performed normally when the elevator reaches any floor door. Integrating one set of anti-pinch components 40 into the door knife device ensures effective anti-pinch protection when the elevator door opens at any stop, eliminating the need for anti-pinch devices at each stop. The installation of the anti-pinch component 40 does not increase the structural complexity or installation difficulty of the elevator system. Moreover, the anti-pinch component 40 is located between the elevator floor door and the car door, making it difficult for passengers and objects to approach, preventing accidental triggering that could cause the elevator to stop abnormally, thus enhancing safety. In addition, the triggering of the detection sensor 42 is achieved through linkage with the door knife mechanism 20, eliminating the need for additional drive structures. The overall structure of the door knife device is simple, easy to disassemble, install, and maintain, and has high practical value.

[0053] In some embodiments of the present invention, the detection sensor 42 can be a force sensor. When the elevator door is open normally, that is, when the clamping force of the door knife mechanism 20 clamping the landing door ball is less than or equal to a preset value, the trigger member 41 can abut against the detection sensor 42 with a force equal to or less than the preset value, or the two can be spaced apart without contact. When a foreign object is inserted into the gap, causing the resistance to the landing door movement to increase, the force of the trigger member 41 against the force sensor increases and exceeds the preset value, thus triggering the force sensor. For example, the force sensor can be a weighing sensor.

[0054] In other embodiments, the detection sensor 42 can also be a contact sensor. Specifically, when the elevator door is open normally, the trigger 41 is spaced apart from the contact sensor and does not make contact. However, when a foreign object is stuck in the gap, causing the resistance to the door movement to increase, the trigger 41 moves to make contact with the contact sensor, thereby triggering the contact sensor.

[0055] Understandably, in some other embodiments, the detection sensor 42 may also be a distance sensor. The distance sensor is triggered by detecting the change in the relative position of the trigger 41 and the distance sensor. When the elevator door is open normally, the interval between the trigger 41 and the distance sensor remains unchanged or is always greater than a certain distance value. When a foreign object is stuck in the gap, causing the resistance to the movement of the landing door to increase, the trigger 41 moves to reduce the distance between itself and the distance sensor, thereby triggering the contact sensor.

[0056] Of course, in other embodiments, the detection sensor 42 can also be other sensors that can be used to achieve the detection function, and the type of detection sensor 42 is not limited to the above-mentioned sensors.

[0057] Please refer to the following: Figures 1 to 3 and Figure 4 and Figure 5 ,in, Figure 4 for Figure 1 The diagram shows a partial structural schematic of the door knife device, with the right knife arm of the door knife mechanism hidden in the diagram. Figure 5 for Figure 1 Another partial structural diagram of the door knife device is shown, in which the left knife arm of the door knife mechanism is hidden.

[0058] In another embodiment of the present invention, the door knife mechanism 20 includes a drive arm 21 connected to the door operator, and a left knife arm 22 and a right knife arm 23 linked with the drive arm 21. The left knife arm 22 and the right knife arm 23 are arranged parallel to each other on the base plate 10. The left knife arm 22 and the right knife arm 23 cooperate to clamp the door ball. One of the detection sensor 42 and the trigger 41 is linked with the left knife arm 22 or the right knife arm 23.

[0059] In this embodiment, as Figure 1 , Figure 4 and Figure 5 As shown, the left blade arm 22 and the right blade arm 23 are installed on the same side of the base plate 10 (in actual use, they are installed on the side of the base plate 10 facing the landing door). The left blade arm 22 and the right blade arm 23 are arranged in parallel and spaced apart. The gap between them is used for the landing door ball to be clamped. The drive arm 21 of the door blade mechanism 20 is linked with the door operator. In use, the door operator drives the left blade arm 22 and the right blade arm 23 to move closer to each other through the drive arm 21, so that the left blade arm 22 and the right blade arm 23 cooperate to clamp the landing door ball, thereby dragging the landing door to move with the car door.

[0060] In actual use, the left blade arm 22 and the right blade arm 23 are in direct contact with the landing door ball. The resistance to the movement of the landing door is directly transmitted to the left blade arm 22 and the right blade arm 23 through the landing door ball. Thus, when the resistance to the movement of the landing door increases due to the gap caused by foreign objects, the increased resistance is transmitted to the left blade arm 22 or the right blade arm 23 most quickly for the entire door knife mechanism 20. Therefore, designing the detection sensor 42 or the trigger 41 to be linked with the left blade arm 22, or designing the detection sensor 42 or the trigger 41 to be linked with the right blade arm 23, can shorten the response time of the detection sensor 42 being triggered and avoid the triggering delay of the detection sensor 42 due to the excessively long resistance transmission path.

[0061] In some specific embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, for example, the trigger 41 can be set to be linked with the right blade arm 23, and the door operator can be set to drive the left blade arm 22 to move through the drive arm 21. The right blade arm 23 is linked with the left blade arm 22. The detection sensor 42 is set on the base plate 10 or linked with the left blade arm 22. When the door is opened normally, the left blade arm 22 and the right blade arm 23 clamp the door ball and switch the door lock assembly 30 from the locked state to the unlocked state. Figure 1 As shown, at this time, the left blade arm 22 remains in close contact with the landing ball under the driving force of the door operator, the detection sensor 42 remains stationary, and the right blade arm 23, in conjunction with the left blade arm 22, clamps the landing ball while bearing the opposite (i.e., rightward) force of the landing ball (the force opposite to the direction shown by F1 in the figure). The left blade arm 22 and the right blade arm 23 clamp the landing ball along... Figure 1 When the door moves to the left as indicated by the middle arrow F1, the resistance to the leftward movement of the door increases when a foreign object is trapped. The reverse force transmitted to the right blade arm 23 via the door ball increases, and the rightward thrust of the door ball on the right blade arm 23 increases instantaneously. At this time, the trigger 41 linked with the right blade arm 23 can trigger the detection sensor 42 in time. Similarly, the detection sensor 42 is linked with the right blade arm 23, and the trigger 41 is set on the base plate 10 or installed on the left blade arm 22.

[0062] For example, in some other specific embodiments, the door operator can drive the right blade arm 23 (not shown) to move via the drive arm 21, while the left blade arm 22 is linked with the right blade arm 23. In this case, the trigger 41 is linked with the left blade arm 22, and the detection sensor 42 is set on the base plate 10 or linked with the right blade arm 23. When the door is open normally, the right blade arm 23 remains in close contact with the landing door ball under the driving force of the door operator, the detection sensor 42 remains stationary, and the left blade arm 22 cooperates with the right blade arm 23 to clamp the landing door. The ball simultaneously bears the reverse force of the landing door ball. The left blade arm 22 and the right blade arm 23 clamp the landing door ball and move it to the right. When a foreign object is clamped in, the resistance to the landing door moving to the right increases, and the reverse (i.e., leftward) force transmitted to the left blade arm 22 through the landing door ball increases. The leftward thrust of the landing door ball on the left blade arm 22 increases. At this time, the trigger 41 linked with the left blade arm 22 can trigger the detection sensor 42 in time. Similarly, the detection sensor 42 is set to be linked with the left blade arm 22, and the trigger 41 is set on the base plate 10 or the right blade arm 23.

[0063] In another embodiment of the invention, such as Figure 1 , Figure 4 and Figure 5 As shown, the aforementioned door knife mechanism 20 also includes an upper linkage 24 and a lower linkage 25. Both the upper linkage 24 and the lower linkage 25 are hinged to the base plate 10. The upper linkage 24, the left knife arm 22, the lower linkage 25, and the right knife arm 23 form a four-bar linkage mechanism. The drive arm 21 is connected to the upper linkage 24. In use, the drive arm 21, driven by the door operator, drives the upper linkage 24 to move relative to the base plate 10. The upper linkage 24 transmits the driving force of the door operator to the left knife arm 22 and the right knife arm 23, thereby causing the left knife arm 22 and the right knife arm 23 to clamp or release the door ball. The door knife mechanism 20 has a simple structure, and its driving principle and process are also simple.

[0064] In this embodiment, one of the detection sensor 42 and the trigger 41, or both, is installed on the lower linkage 25. Since the upper linkage 24 is directly connected to the drive arm 21 in the above-mentioned four-bar linkage mechanism, and the upper linkage 24 is the driving member of the four-bar linkage mechanism, while the lower linkage 25 is the driven member, the resistance to the movement of the landing door is not the main driving force for the door knife mechanism 20, but a reaction force opposite to the driving force. Therefore, by setting at least one of the detection sensor 42 and the trigger 41 on the lower linkage 25, the triggering of the detection sensor 42 is more sensitive and less affected by the door operator's driving force.

[0065] Specifically, in this embodiment, such as Figure 1 , Figure 4 and Figure 5As shown, the upper linkage 24 has a first end 242 and a second end 243 along its length, and the lower linkage 25 has a first end 253 and a second end 254 along its length. The middle part of the upper linkage 24 is hinged to the base plate 10, and the middle part of the lower linkage 25 is hinged to the base plate 10, for example, by means of a pin or bearing. The upper end of the left cutter arm 22 is hinged to the first end 242 of the upper linkage 24, and the lower end of the left cutter arm 22 is hinged to the first end 253 of the lower linkage 25. The upper end of the right cutter arm 23 is hinged to the second end 243 of the upper linkage 24, and the lower end of the right cutter arm 23 is hinged to the second end 254 of the lower linkage 25. The upper linkage 24, the left cutter arm 22, the lower linkage 25, and the right cutter arm 23 together form a four-bar linkage mechanism. A support arm 241 is provided on the side of the upper linkage 24, and the drive arm 21 is connected to the door operator and the upper linkage 24 through the support arm 241.

[0066] like Figure 1 As shown, taking the door knife device installed on the left door leaf of the car door as an example, in actual use, the door operator drives the drive arm 21 to drive the upper linkage 24 to rotate relative to the base plate 10. The upper linkage 24 drives the left knife arm 22 to move. The left knife arm 22 moves and drives the lower linkage 25 to rotate synchronously. The lower linkage 25 further drives the right knife arm 23 to move, so that the left knife arm 22 and the right knife arm 23 move closer to each other to clamp the landing ball, or move the left knife arm 22 and the right knife arm 23 away from each other to release the landing ball.

[0067] In this embodiment, one of the detection sensor 42 and the trigger 41 is installed at the second end 254 of the lower linkage 25. For example, the detection sensor 42 is installed at the second end 254 of the lower linkage 25. Figure 4 As shown. Compared to the first end 253 of the lower linkage 25, the second end 254 of the lower linkage 25 is farther from the driving member (i.e., the upper linkage 24) of the four-bar linkage mechanism in the transmission path of the main power driving the door knife mechanism 20. Thus, by setting the detection sensor 42 or the trigger 41 at the second end 254 of the lower linkage 25, the triggering of the detection sensor 42 is more sensitive and less affected by the door machine driving force.

[0068] In a specific embodiment, the detection sensor 42 can be installed at the second end 254 of the lower linkage 25, and the trigger 41 can be installed on the base plate 10; alternatively, the trigger 41 can be installed at the second end 254 of the lower linkage 25, and the detection sensor 42 can be installed on the base plate 10. In both cases, the trigger 41 can trigger the detection sensor 42 when the resistance to the movement of the landing door increases.

[0069] In another embodiment of the invention, such as Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, unlike the embodiments described above, in this embodiment, both the detection sensor 42 and the trigger 41 are installed on the second end of the lower linkage 25, and the trigger 41 is configured to be linked with the right blade arm 23.

[0070] Specifically, such as Figure 1 , Figure 4 and Figure 5 As shown, the door knife mechanism 20 also includes a micro actuator 26. The micro actuator 26 has a first end 262 and a second end 263 along its length. The first end 262 of the micro actuator 26 is hinged to the second end 254 of the lower linkage 25 by a pin or bearing. The right knife arm 23 is hinged to the second end 263 of the micro actuator 26 by a limiting shaft 261. That is, one end of the limiting shaft 261 is fixedly connected to the right knife arm 23, and the other end is rotatably connected to the second end 263 of the micro actuator 26. The limiting shaft 261 is equivalent to the pin that hinges the right knife arm 23 and the micro actuator 26. The detection sensor 42 is located on the side of the end of the limiting shaft 261 away from the right knife arm 23. The end of the limiting shaft 261 away from the right knife arm 23 forms the aforementioned trigger 41. Thus, when a foreign object gets stuck in the gap and obstructs the movement of the door, the trigger 41 is linked with the right blade arm 23, and the detection sensor 42 is linked with the left blade arm 22, thereby ensuring that the trigger 41 triggers the detection sensor 42 in time when the door movement is obstructed.

[0071] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, taking the door knife device installed on the left door leaf of the car door as an example, during normal door opening, the left knife arm 22 and the right knife arm 23 clamp the door ball and switch the door lock assembly 30 from the locked state to the unlocked state, as follows: Figure 1 As shown, at this time, the left blade arm 22 remains in close contact with the landing ball under the driving force of the door operator. The lower linkage 25 and the detection sensor 42 remain stationary. The right blade arm 23, in conjunction with the left blade arm 22, clamps the landing ball while bearing the opposite (i.e., rightward) force of the landing ball (the force opposite to the direction shown by F1 in the figure). The left blade arm 22 and the right blade arm 23 clamp the landing ball along... Figure 1 As indicated by the middle arrow F1, the door moves to the left. When a foreign object is trapped, the resistance to the leftward movement of the door increases, and the reverse force transmitted to the right blade arm 23 via the door ball increases. The rightward thrust of the door ball on the right blade arm 23 will increase instantaneously. At this time, the right blade arm 23 drives the micro-actuator 26 to rotate along its hinge axis at its first end 262. Figure 1 Rotating counterclockwise as indicated by the middle arrow F2, the trigger element 41, i.e., the limit shaft 261, moves to the lower right along with the micro-motion element 26 (as shown). Figure 1 Move in the direction indicated by the middle arrow F3, and trigger 41 will trigger the detection sensor 42.

[0072] Furthermore, as the resistance to the landing door movement increases, in order to keep the landing door ball clamped by the left blade arm 22 and the right blade arm 23, the left blade arm 22 will move rapidly to the right under the drive of the door operator, thereby driving the lower linkage 25 to rotate along its hinge axis with the base plate 10. Figure 1 Rotate counterclockwise in the direction indicated by the middle arrow F2, and the sensor 42 installed at the second end 254 of the lower linkage 25 moves to the upper left (e.g., Figure 1 Move in the direction indicated by the middle arrow F4. At this time, the trigger 41 and the detection sensor 42 move towards each other until the trigger 41 triggers the detection sensor 42. In this way, both the trigger 41 and the detection sensor 42 are linked to the door knife mechanism 20. When a foreign object is caught in the gap, the detection sensor 42 and the trigger 41 can also move towards each other. Compared with the movement of a single object on one side, this can further shorten the trigger time and improve the detection response speed.

[0073] In this embodiment, as Figure 3 As shown, the detection sensor 42 is located on the side of the lower linkage 25 facing away from the right blade arm 23. Specifically, the lower end of the base plate 10 has a notch 11, and the second end 254 of the lower linkage 25 has a protruding mounting arm 252. The detection sensor 42 is mounted on the mounting arm 252 and protrudes from the notch 11 to the side of the base plate 10 facing away from the door. Correspondingly, the lower linkage 25 has a limiting hole 251. The end of the limiting shaft 261 facing away from the right blade arm 23 passes through the limiting hole 251. The limiting hole 251 is an elongated hole with a size larger than that of the limiting shaft 261 to ensure that the limiting shaft 261 can move within the limiting hole 251 to trigger the detection sensor 42. For example, the limiting hole 251 can be an oblong hole. Specifically, when a foreign object is inserted into the gap, the micro-actuator 26 moves along... Figure 1 Rotate in the direction indicated by the middle arrow F2, and the limiting shaft 261 (i.e., the trigger 41) moves toward the detection sensor 42 within the limiting hole 251, thereby triggering the detection sensor 42.

[0074] The following describes in detail the triggering process of the detection sensor, taking the door knife device installed on the left door leaf of the car door and the detection sensor being a force sensor as an example:

[0075] like Figure 3 As shown, the force sensor generally includes a mounting bracket 421, an electrical module 424 and a push pin 423 mounted on the mounting bracket 421. The mounting bracket 421 is fixedly connected to the mounting arm 252, and the push pin 423 is connected to the electrical module 424 via a rubber pad 422. The trigger element 41, i.e., the end of the limiting shaft 261 facing away from the right knife arm, protrudes from the limiting hole 251. During normal door opening, the trigger element 41 contacts the push pin 423, or the trigger element 41 presses against the push pin 423 with a certain resistance force, and this resistance force is equal to or less than the preset value of the resistance encountered by the door knife mechanism 20 when it clamps the door ball during normal movement.

[0076] The instant a foreign object becomes lodged in the gap, please combine... Figure 1 and Figure 3 As the door moves to the left, the resistance increases, and the rightward thrust of the door ball on the right cutter arm 23 increases instantaneously. At this moment, the right cutter arm 23 drives the micro-motion component 26 along... Figure 1 Rotating counterclockwise as indicated by the middle arrow F2, the trigger element 41, i.e., the limit shaft 261, moves to the lower right along with the micro-motion element 26, pressing against the ejector pin 423. The ejector pin 423, under force, triggers the switch inside the electrical module 424, thereby triggering the sensor. Furthermore, as the resistance to the landing door movement increases, to ensure the landing door ball is always clamped by the left cutter arm 22 and the right cutter arm 23, the left cutter arm 22 will move rapidly to the right under the door operator's drive, thereby driving the lower linkage element 25 along... Figure 1 Rotating counterclockwise in the direction indicated by the middle arrow F2 causes the second end detection sensor 42, installed on the lower linkage 25, to move to the upper left. At this time, the trigger 41 and the ejector pin 423 move towards each other until the trigger 41 presses against the ejector pin 423, triggering the switch in the electrical module 424.

[0077] In another embodiment of the invention, such as Figure 1 , Figure 4 and Figure 5 As shown, the door lock assembly 30 includes a lock hook 31 that is linked to the upper linkage 24. The lock hook 31 is hinged to the base plate 10 and has a lock hook 311 for mating with a door lock seat mounted on the door operator base plate. When the door lock assembly 30 is in the locked state, the lock hook 311 of the lock hook 31 is hooked onto the door lock seat, and when the door lock assembly 30 is in the unlocked state, as shown... Figure 1 As shown, when the door knife mechanism 20 clamps the door ball, the locking hook 311 of the locking hook 31 disengages from the door lock seat, thereby allowing the two door panels of the car door to move away from each other to open the car door or move closer to each other to close the car door.

[0078] Specifically, such as Figure 1 and Figure 4 As shown, in this embodiment, the first end of the locking hook 31 is hinged to the base plate 10 by a pin or bearing, the second end of the locking hook 31 extends beyond the base plate 10, the locking hook 311 is disposed at the second end of the locking hook 31, the door lock assembly 30 also includes an unlocking member 32, the unlocking member 32 has a connecting arm 321 and a pressing arm 322 connected to the connecting arm 321, the end of the connecting arm 321 away from the pressing arm 322 is hinged to the second end of the upper linkage member 24, the right blade arm 23 is hinged to the other end of the connecting arm 321, and the pressing arm 322 abuts against the first end of the locking hook 31.

[0079] Furthermore, the first end of the lock hook 31 is also connected to the base plate 10 via a spring 33. The pressing point of the pressing arm 322 against the lock hook 31 and the connection point of the spring 33 to the lock hook 31 are located on the left and right sides of the hinge axis of the lock hook 31 to the base plate 10, respectively. Thus, when the door lock assembly 30 is in the locked state, the pulling force of the spring 33 on the lock hook 31 is greater than the pressing force of the pressing arm 322 against the lock hook 31, and the lock hook 311 of the lock hook 31 remains hooked downwards with the door lock seat. When the door is opened, such as Figure 1 As shown, the door operator drives the door knife mechanism 20 to clamp the floor ball. The drive arm 21 drives the upper linkage 24 to rotate counterclockwise. The driving force is transmitted to the unlocking member 32 through the right knife arm 23. The unlocking member 32 rotates counterclockwise, increasing the pressure of the pressing arm 322 against the lock hook 31. The lock hook 31 rotates counterclockwise, and the lock hook 311 disengages from the lock hook 311 seat. The door lock assembly 30 switches from the locked state to the unlocked state. Furthermore, during the process of the door knife mechanism 20 clamping the floor ball, the unlocking member 32 is always pressed against the door, keeping its second end in an upward trend, thus keeping the door lock assembly 30 in the unlocked state at all times.

[0080] Please combine them together Figure 6 ,in, Figure 6 for Figure 1 The diagram shows the structure of the unlocking component of the door lock assembly of the door knife device.

[0081] like Figure 4 and Figure 6 As shown, in this embodiment, the surface of the pressing arm 322 that contacts the locking hook 31 is a convex arc surface. A roller 312 is installed on the locking hook 311 arm, and the pressing arm 322 abuts against the outer ring of the roller 312. In this way, a point contact is formed between the pressing arm 322 and the locking hook 31, and the friction force when the pressing arm 322 presses against the locking hook 31 is reduced, making the locking hook 31 rotate more sensitively under the pressure.

[0082] In other embodiments, the roller 312 described above may be omitted, and the surfaces of the pressing arm 322 and the locking hook 31 that contact each other, as well as the surfaces of the locking hook 31 and the pressing arm 322 that contact each other, may be set as convex arc surfaces. In this way, the pressing arm 322 and the locking hook 31 will also form point contact.

[0083] The electric door knife device of the above embodiments of the present invention, by integrating an anti-pinch component into the door knife device, can effectively prevent the normal opening of the elevator door from being affected by foreign objects being caught in the gap, and avoid damage to the caught objects, thus providing a more reliable guarantee for the safe operation of the elevator. The anti-pinch component moves with the elevator car, and its action and function can be performed normally when the elevator reaches any floor door. Integrating one set of anti-pinch components into the door knife device can ensure that the elevator can effectively prevent pinching when the door is opened at any stop, eliminating the need to install an anti-pinch device at each stop, thus not increasing the structural complexity and installation difficulty of the elevator system. Moreover, the anti-pinch component is located between the elevator floor door and the car door, making it difficult for passengers and objects to approach, and preventing the elevator from stopping abnormally due to accidental triggering, thus improving safety. In addition, the triggering of the detection sensor is achieved through linkage with the door knife mechanism, eliminating the need for additional drive structures. The overall structure of the door knife device is simple, easy to disassemble, install, and maintain, and has high practical value.

[0084] Another embodiment of the present invention provides an elevator (not shown) including the door knife device described above.

[0085] The elevator provided in this embodiment uses the door knife device of the above embodiments. Its anti-pinch component moves with the elevator car. When the elevator reaches any floor door, the action and function of the anti-pinch component can be performed normally. It is not necessary to install an anti-pinch device on each floor. The installation of the anti-pinch component will not increase the complexity of the overall elevator mechanism or the installation difficulty. Moreover, the anti-pinch component is located between the elevator floor door and the car door, making it difficult for passengers and items to approach. It will not cause the elevator to stop abnormally due to accidental triggering. The overall performance of the elevator system is improved and the safety of use is higher.

[0086] Understandably, the elevator also has other technical effects of the door knife device provided in the above embodiments, which will not be elaborated here.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A door closer device, characterised in that, include: Base plate; A door knife mechanism is mounted on the base plate and is used to clamp the door ball under the drive of the door operator; A door lock assembly is installed on the base plate and linked to the door knife mechanism. The door lock assembly can switch between a locked state and an unlocked state, and when the door knife mechanism clamps the door ball, the door lock assembly is in the unlocked state. The anti-pinch assembly includes a detection sensor and a trigger. The door knife mechanism includes a drive arm connected to the door operator, and a left knife arm and a right knife arm linked to the drive arm. The left knife arm and the right knife arm are arranged parallel to each other on the base plate. The left knife arm and the right knife arm cooperate to clamp the landing door ball to drag the landing door to follow the bridge door. One of the detection sensor and the trigger is linked to the left knife arm or the right knife arm. When the resistance encountered by the door knife mechanism when clamping the landing door ball exceeds a preset value, the trigger triggers the detection sensor. The detection sensor is used to communicate with the door operator. When the detection sensor is triggered by the trigger, the detection sensor is used to send a trigger information to the door operator, so that the door operator can restart after stopping the door opening drive and reverse the drive to close the door again.

2. The door knife device according to claim 1, characterized in that, The door knife mechanism also includes an upper linkage and a lower linkage. The upper linkage, the left knife arm, the lower linkage, and the right knife arm constitute a four-bar linkage mechanism. The drive arm is connected to the upper linkage, and the detection sensor and / or the trigger is installed on the lower linkage.

3. The door knife device according to claim 2, characterized in that, The middle parts of the upper linkage and the lower linkage are respectively hinged to the base plate. The upper end of the left cutter arm is hinged to the first end of the upper linkage, the lower end of the left cutter arm is hinged to the first end of the lower linkage, the upper end of the right cutter arm is hinged to the second end of the upper linkage, the lower end of the right cutter arm is hinged to the second end of the lower linkage, and the detection sensor and / or the trigger is installed at the second end of the lower linkage.

4. The door knife device according to claim 3, characterized in that, The detection sensor is installed at the second end of the lower linkage component, and the trigger is installed on the base plate; or, the trigger is installed at the second end of the lower linkage component, and the detection sensor is installed on the base plate.

5. The door knife device according to claim 3, characterized in that, The detection sensor is installed at the second end of the lower linkage member. The door knife mechanism also includes a micro-motion member hinged to the second end of the lower linkage member. The right knife arm is hinged to the micro-motion member through a limiting shaft. The detection sensor is located on the side of the end of the limiting shaft away from the right knife arm. The end of the limiting shaft away from the right knife arm forms the trigger member.

6. The door knife device according to claim 5, characterized in that, The detection sensor is located on the side of the lower linkage component facing away from the right cutter arm. The lower linkage component is provided with a limit hole. The end of the limit shaft facing away from the right cutter arm passes through the limit hole. The limit shaft can move within the limit hole to trigger the detection sensor.

7. The door knife device according to any one of claims 1 to 6, characterized in that, The detection sensor is a force sensor, a contact sensor, or a distance sensor.

8. The door knife device according to any one of claims 3 to 6, characterized in that, The door lock assembly includes a lock hook that is linked to the upper linkage member. The lock hook is hinged to the base plate and has a lock hook for mating with a door lock seat installed on the car door. When the door knife mechanism clamps the door ball, the lock hook disengages from the door lock seat and is in the unlocked state.

9. The door knife device according to claim 8, characterized in that, The door lock assembly also includes an unlocking component, which has a connecting arm and a pressing arm connected to the connecting arm. One end of the connecting arm away from the pressing arm is hinged to the second end of the upper linkage component. The right blade arm is hinged to the other end of the connecting arm, and the pressing arm abuts against the lock hook component.

10. The door knife device according to claim 9, characterized in that, The surface of the pressing arm that contacts the locking hook is a convex arc surface. A roller is installed on the locking hook arm, and the pressing arm abuts against the outer ring of the roller. Alternatively, the surfaces of the pressing arm and the locking hook that contact each other, as well as the surfaces of the locking hook and the pressing arm, are both convex arc surfaces.

11. An elevator, characterized in that, Includes the door knife device as described in any one of claims 1 to 10.

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