Lift car door lock hook

Abstract

The utility model discloses a sundry elevator car door lock hook, including decorative plastic cover and movable lock hook plate, the back of decorative plastic cover is provided with plastic cover fixed plate, the front of decorative plastic cover is provided with two half round head screws, the rear end of half round head screw is in proper order from front to back and is passed through decorative plastic cover and plastic cover fixed plate and extends to the back of plastic cover fixed plate and the internal thread connection of plastic cover fixed plate. The utility model discloses the adaptive design of movable lock hook plate and overall structure, discarded the complicated operation of traditional left and right movable lock hook need manual dialing, utilizes the mechanical action force of car door closure and drives movable lock hook plate automatic locking, realizes the linkage effect of locking when closing, and operating personnel need not the action of additional execution lock hook dialing, fundamentally avoided the safety accidents such as car door accidental opening and sundry falling because of forgetting dialing lock hook, greatly promoted the use safety of sundry elevator, and durable operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of elevator car technology, specifically to a door lock hook for a freight elevator. Background Technology

[0002] Currently, there are three types of opening methods for small dumbwaiter doors: the first type is a door that opens upwards on its own, also called a knife door; the second type is a door that opens vertically in two sections, also called a center-opening door; and the third type is a door that opens to the left or right, or to both the left and right, also called a side-opening door.

[0003] The most commonly used door structure on the market is the center-part door structure. The purpose of using the locking hook is to prevent the car door from opening automatically when the car is moving up and down, thus avoiding safety accidents caused by falling debris.

[0004] Traditional dumbwaiter car doors typically have hinged latches that move left and right, such as... Figure 4 As shown, the biggest drawback of this type of lock hook is that the operator must move the lock hook to close the door after closing it. If the operator forgets to move the lock hook, it can easily cause an accident. Therefore, the operator has to repeatedly move the lock hook when opening and closing the door, which is very annoying. Another type is the spring-loaded lock hook. The advantage of this type of lock hook is that it can be closed directly when closing the door, eliminating the above-mentioned extra closing action. However, the spring is very easy to damage, especially in frequently used scenarios such as hotels. Once damaged, it will affect the efficiency of serving food.

[0005] Therefore, we provide a lock hook for the door of a service elevator car. Utility Model Content

[0006] The purpose of this utility model is to provide a lock hook for the car door of a service elevator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lock hook for a service elevator car door, comprising a decorative plastic sleeve and a movable lock hook plate. A plastic sleeve fixing plate is provided on the back of the decorative plastic sleeve, and two semi-circular head screws are provided on the front of the decorative plastic sleeve. The rear ends of the semi-circular head screws pass through the decorative plastic sleeve and the plastic sleeve fixing plate from front to back and extend to the back of the plastic sleeve fixing plate, where they are connected to the internal threads of the plastic sleeve fixing plate.

[0008] Optionally, the movable locking hook plate is disposed on the back of the plastic sleeve fixing plate, and a rear cover plate is disposed on the back of the movable locking hook plate.

[0009] Optionally, a first countersunk screw is provided on the left side of the front of the plastic sleeve fixing plate, and a second countersunk screw is provided on the right side of the front of the plastic sleeve fixing plate. The rear end of the first countersunk screw passes through the plastic sleeve fixing plate, the movable locking hook plate and the rear cover plate from front to back and extends to the outside of the rear cover plate.

[0010] Optionally, a first nut is threaded onto the surface of the first countersunk screw and on the front and back sides of the movable locking hook plate, and a positioning sleeve is fitted onto the surface of the first countersunk screw and on the front side of the rear cover plate.

[0011] Optionally, the rear end of the second countersunk screw passes through the plastic sleeve fixing plate and the rear cover plate from front to back and extends to the outside of the rear cover plate. The surfaces of the first countersunk screw and the second countersunk screw, and located on the back of the rear cover plate, are both threaded with a second nut.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the adaptive design of the movable locking hook plate and the overall structure, eliminates the cumbersome operation of manually moving the traditional left and right movable locking hooks. It utilizes the mechanical force when the car door closes to drive the movable locking hook plate to automatically lock, achieving a linkage effect of locking as soon as the door closes. Operators do not need to perform additional locking hook movements, fundamentally avoiding safety accidents such as accidental opening of the car door and falling debris due to forgetting to move the locking hook. This greatly improves the safety of the service elevator, making the structure simple, durable, and easy to operate. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the three-dimensional structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the lock hook of this utility model installed on the car door; Figure 4 This is a three-dimensional structural diagram of a movable locking hook in the prior art.

[0014] In the diagram: 1. Decorative plastic sleeve; 2. Plastic sleeve fixing plate; 3. Movable lock hook plate; 4. Rear cover plate; 5. Semi-circular head screw; 6. First countersunk head screw; 7. Second countersunk head screw; 8. First nut; 9. Positioning sleeve; 10. Second nut; 11. Upper door of the car; 12. Lower door of the car; 13. Lock hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4The dumbwaiter car door lock hook includes a decorative plastic sleeve 1. The back of the decorative plastic sleeve 1 is provided with the car door 11. The decorative plastic sleeve 1 serves as an external protective and decorative component of the device. The front is fixed by a semi-circular head screw 5, which covers the internal connection structure and forms a protective barrier. A plastic sleeve fixing plate 2 is provided in the cavity inside the car door 11 and at the position corresponding to the decorative plastic sleeve 1. Two semi-circular head screws 5 are provided on the front of the decorative plastic sleeve 1. The rear end of the semi-circular head screw 5 passes through the decorative plastic sleeve 1, the car door 11 and the plastic sleeve fixing plate 2 from front to back and extends to the outside of the plastic sleeve fixing plate 2 and is threadedly connected to the inside of the plastic sleeve fixing plate 2. The decorative plastic sleeve 1 and the plastic sleeve fixing plate 2 are fixed to the car door 11 by the semi-circular head screws 5.

[0017] A movable locking hook plate 3 is installed on the back of the plastic sleeve fixing plate 2 and inside the cavity of the upper door 11 of the car. The movable locking hook plate 3 is positioned by a first countersunk screw 6 and can move flexibly. When the door is closed, it precisely engages with the lock hole 13 of the lower door 12 of the car to achieve the locking function. It abandons the traditional manual toggle design and uses the mechanical force of the car door closing to drive the engagement, so as to achieve locking when the door is closed and solve the safety hazard of forgetting to toggle the traditional locking hook. A rear cover plate 4 is installed on the back of the movable locking hook plate 3. The rear cover plate 4 closes the rear end structure of the device. A first countersunk screw 6 is installed on the left side of the front of the plastic sleeve fixing plate 2. The rear end of the first countersunk screw 6 passes through the plastic sleeve fixing plate 2, the movable locking hook plate 3 and the rear cover plate 4 from front to back and extends to the outside of the rear cover plate 4. The nail 6 provides the rotating axis for the movable locking hook plate 3, and works with the first nut 8 and the positioning sleeve 9 to achieve positioning. The first countersunk screw 6 is threaded with the first nut 8 on the front and back of the movable locking hook plate 3 respectively. The side of the first nut 8 near the movable locking hook plate 3 is in close contact with the movable locking hook plate 3. The positioning sleeve 9 is fitted on the front of the rear cover plate 4 on the surface of the first countersunk screw 6. The positioning sleeve 9 limits the relative position of the rear cover plate 4 and the first nut 8. The side of the positioning sleeve 9 near the rear cover plate 4 is in contact with the rear cover plate 4. The positioning sleeve 9 is in close contact with the first nut 8 located on the rear side. The first nut 8 is clamped by the front and back sides to limit the front and back position of the movable locking hook plate 3, to prevent it from moving back and forth during operation, and to ensure locking accuracy.

[0018] A second countersunk screw 7 is provided on the right side of the front of the plastic sleeve fixing plate 2. The rear end of the second countersunk screw 7 passes through the plastic sleeve fixing plate 2 and the rear cover plate 4 from front to back and extends to the outside of the rear cover plate 4. The second countersunk screw 7 assists the first countersunk screw 6 in reinforcing the installation of the rear cover plate 4, forming a two-point fixation with the first countersunk screw 6, improving the stability of the installation of the rear cover plate 4 and preventing loosening at a single fixing point. The surfaces of the first countersunk screw 6 and the second countersunk screw 7, and located on the back of the rear cover plate 4, are threaded with a second nut 10. The second nut 10 locks the rear cover plate 4 with the first countersunk screw 6 and the second countersunk screw 7, forming a front and rear locking system, further improving the structure's anti-loosening ability and keeping the components fixed during elevator vibration.

[0019] Below the upper car door 11, there is a lower car door 12. The top of the lower car door 12 has a lock hole 13 that works with the movable lock hook plate 3. The lower car door 12 works with the upper car door 11 to open and close the elevator door. The lock hole 13 at the top provides a locking mechanism for the movable lock hook plate 3. The movable lock hook plate 3 is in a naturally locked position under the action of gravity. Its front end protrudes from the bottom of the upper car door 11 and is aligned with the lock hole 13 at the top of the lower car door 12.

[0020] In use, simply put your hand into the door frame hole of the upper car door 11 and pull the upper car door 11 down to gradually close the upper car door 11 and the lower car door 12. When the inclined surface of the movable lock hook plate 3 contacts the edge of the lock hole 13 of the lower car door 12, the downward pulling force of closing the door will drive the movable lock hook plate 3 to automatically rotate around the first countersunk screw 6 to open, ensuring that the door closes smoothly. After the movable lock hook plate 3 is fully inserted into the lock hole 13, the movable lock hook plate 3, which loses the contact pressure, will automatically reset under its own gravity bias and return to the locked posture, firmly hooking the upper car door 11 and the lower car door 12 together. When the door needs to be opened, the operator puts their hand into the door frame hole of the upper door 11 of the car, contacts the bottom of the movable lock hook plate 3 and applies upward force. This force will drive the movable lock hook plate 3 to rotate upward around the first countersunk screw 6, causing its locking part to disengage from the lock hole 13 of the lower door 12 of the car, thus releasing the locked state. At this time, the operator releases their hand, and the car door separates freely under its own weight or the action of the elevator door drive mechanism, thus completing the door opening operation.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lock hook for a service elevator car door, characterized in that: It includes a decorative plastic sleeve (1) and a movable locking hook plate (3). A plastic sleeve fixing plate (2) is provided on the back of the decorative plastic sleeve (1). Two semi-circular head screws (5) are provided on the front of the decorative plastic sleeve (1). The rear end of the semi-circular head screws (5) passes through the decorative plastic sleeve (1) and the plastic sleeve fixing plate (2) from front to back and extends to the back of the plastic sleeve fixing plate (2) and is connected to the internal thread of the plastic sleeve fixing plate (2).

2. The service elevator car door lock hook according to claim 1, characterized in that: The movable locking hook plate (3) is located on the back of the plastic sleeve fixing plate (2), and a rear cover plate (4) is provided on the back of the movable locking hook plate (3).

3. The service elevator car door lock hook according to claim 2, characterized in that: A first countersunk screw (6) is provided on the left side of the front of the plastic sleeve fixing plate (2), and a second countersunk screw (7) is provided on the right side of the front of the plastic sleeve fixing plate (2). The rear end of the first countersunk screw (6) passes through the plastic sleeve fixing plate (2), the movable locking hook plate (3) and the rear cover plate (4) from front to back and extends to the outside of the rear cover plate (4).

4. The service elevator car door lock hook according to claim 3, characterized in that: The first countersunk screw (6) is threaded with a first nut (8) on the surface and on the front and back of the movable locking hook plate (3), and a positioning sleeve (9) is fitted on the surface of the first countersunk screw (6) and on the front of the rear cover plate (4).

5. The service elevator car door lock hook according to claim 4, characterized in that: The rear end of the second countersunk screw (7) passes through the plastic sleeve fixing plate (2) and the rear cover plate (4) from front to back and extends to the outside of the rear cover plate (4). The surface of the first countersunk screw (6) and the surface of the second countersunk screw (7) and the back of the rear cover plate (4) are both threaded with a second nut (10).

Images