Elevator car door with anti-pinch early warning structure

Abstract

The utility model relates to the technical field of elevators, in particular to an elevator car door with an anti-pinch early warning structure, which comprises an elevator, two car doors arranged in bilateral symmetry are arranged on the front side of the elevator, U-shaped avoiding grooves are formed in the opposite side surfaces of the two car doors, rectangular mounting grooves are formed in the side surfaces of the inner walls of the U-shaped avoiding grooves, and the rectangular mounting grooves are arranged in the rectangular mounting grooves. A pre-tightening assembly is arranged in the rectangular mounting groove and comprises a rectangular fixing plate, the rectangular fixing plate is located in the rectangular mounting groove, first circular grooves are formed in the positions, close to the upper end and the lower end, of the side face of the rectangular fixing plate correspondingly, and circular positioning rods are slidably connected into the two first circular grooves correspondingly; the outer ends of the two circular positioning rods are jointly connected with a strip-shaped movable plate. According to the elevator car door with the anti-pinch early warning structure, by arranging a mechanical transmission structure of the strip-shaped movable plate and the circular extrusion rod and combining the real-time detection function of the pressure sensor, whether the situation of pinch or foreign matter exists in the closing process of the car door or not can be accurately sensed.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator technical field, concretely is elevator car door with anti -pinch early warning structure. BACKGROUND

[0002] As an indispensable vertical traffic tool in modern buildings, elevators are widely used in residential buildings, office buildings, shopping malls, hospitals and other places, providing great convenience for people's life and work. However, with the increasing demand for elevator use, its safety has been increasingly valued. Among all the components of the elevator, the elevator car door, as the main access for passengers to enter and exit the car, is directly related to the safety of use. If the car door fails to detect obstacles in time during the closing process, it may cause safety accidents such as passenger injury, especially the hand or other body parts being pinched, which not only threatens personal safety, but also easily leads to legal disputes and economic losses.

[0003] The patent with publication number CN220300104U discloses an elevator with anti-pinch reminding function, which comprises a car, elevator doors installed on both sides of the front end of the car, an infrared light curtain transmitter installed on the front side of the upper end inside the car, an infrared light curtain receiver installed on the front side of the lower end inside the car, and a sliding groove opened on one side inside the elevator door, wherein the inside of the sliding groove is slidably provided with a rubber buffer plate, transmission cavities are opened above and below one side of the sliding groove, sliding blocks are arranged inside the transmission cavities, sliding rods are welded on one side inside the transmission cavities, the sliding rods penetrate through the sliding blocks and are in sliding cooperation with the sliding blocks, and first buffer blocks are fixedly attached to the upper and lower ends of one side of the rubber buffer plate. The elevator with anti-pinch reminding function can prevent injury risk when the human body is pinched, improving the overall safety.

[0004] The above-mentioned prior art can achieve basic anti-pinch reminding function by respectively arranging infrared light curtain transmitter and infrared light curtain receiver on the front side of the upper and lower ends inside the car. When an object blocks the infrared area, the infrared light curtain receiver will stop the elevator door from closing through the controller. However, this design still has certain limitations. First, there is a gap in the infrared light curtain, and the coverage range of the infrared light curtain has a detection blind area, which may not completely cover all the gap areas of the car door, resulting in the risk of small-area objects not being detected in time. Second, the infrared light curtain receiver located below is easy to be damaged due to the use environment, such as being stepped on, being pressed by a cart wheel or being hard rubbed due to object movement, causing the surface of the light curtain receiver to wear out, resulting in signal reception failure. This not only makes the car door unable to correctly detect obstacles, but also may cause the closing action to be interrupted, affecting the normal operation and safety of the elevator. In view of this, we propose an elevator car door with anti-pinch hand early warning structure. The utility model discloses a content

[0005] The utility model discloses a purpose at providing with the elevator car door of anti -hand -pinching early warning structure to solve the problem of above -mentioned background art.

[0006] To realize above -mentioned purpose, the utility model provides the following technical scheme:

[0007] With the elevator car door of anti -hand -pinching early warning structure, including the elevator, the front side of elevator is equipped with two car doors that are left and right symmetrical arrangement, the opposite side of two car door all is equipped with U -shaped avoidance groove, and the sliding of the strip movable plate is provided with the activity space, the side of U -shaped avoidance groove inner wall is equipped with rectangular mounting groove, is equipped with pre -tightening assembly in rectangular mounting groove, pre -tightening assembly includes rectangular fixed plate, and rectangular fixed plate is located in rectangular mounting groove, and the side of rectangular fixed plate and the position close to upper and lower both ends all are equipped with first circular groove, and two first circular groove all are slidably connected with circular positioning rod, and first circular groove provides the sliding guide function for circular positioning rod, and circular positioning rod makes the left and right stable movement of strip movable plate;

[0008] The outer end of two circular positioning rods is commonly connected with the strip movable plate, and the strip movable plate can move left and right, and one side of the strip movable plate close to the rectangular fixed plate is equipped with two circular extrusion rods that are up and down symmetrical arrangement, and the function of circular extrusion rod is to transmit the movement of strip movable plate to pressure sensor, to realize the detection function of hand -pinching event;

[0009] The side of rectangular fixed plate and the position between two first circular grooves are equipped with two second circular grooves that are up and down symmetrical arrangement, and two circular extrusion rods are slidably connected in two second circular grooves respectively, and second circular groove provides sliding guide rail for circular extrusion rod, to ensure the accuracy and stability of its movement, and the position of rectangular fixed plate in two second circular grooves left end all are equipped with mounting recess, and two mounting recesses all are equipped with pressure sensor, and the inside of car door and rectangular fixed plate are all equipped with wire slot for the wire of pressure sensor to pass through, and pressure sensor is used for detecting the pressure that circular extrusion rod exerts, when detecting abnormal pressure, trigger signal is fed back to control system, and the closing action of elevator door is stopped, and the car door is opened.

[0010] Preferably, the rear side of the car door is provided with three mounting holes a arranged equidistantly, the mounting holes a are connected with third bolts, the threaded ends of the third bolts are threadedly connected to the rear side of the rectangular fixed plate, and the third bolts are used for firmly connecting the car door and the rectangular fixed plate to ensure the stability of the pre-tightening assembly.

[0011] Preferably, the top of the rectangular fixed plate is provided with a mounting hole b, a second bolt is connected in the mounting hole b, a waist-shaped avoiding hole for the second bolt to pass through is formed in the outer wall of the upper circular positioning rod, the threaded end of the second bolt is threadedly connected to the bottom of the inner wall of the upper first circular groove, and the second bolt is used for limiting the circular positioning rod and allowing the circular positioning rod to slide and adjust within a certain range, so that the strip-shaped movable plate can move left and right.

[0012] Preferably, the front side of the rectangular fixed plate is provided with two rectangular grooves, the two rectangular grooves are communicated with the two mounting grooves respectively, and a mounting plate is arranged in the rectangular groove.

[0013] Preferably, mounting holes c are formed in the front side of the mounting plate and close to the upper and lower ends, first bolts are connected in the mounting holes c, threaded ends of the first bolts are threadedly connected to the rear side of the inner wall of the rectangular groove, and the first bolts are used for fixing the mounting plate in the rectangular groove, so as to further enhance the firmness of the overall structure.

[0014] Preferably, when the two car doors are closed and no foreign matter exists between the two car doors, the end of the circular extrusion rod is attached to the detection end of the pressure sensor, and the end of the circular extrusion rod does not extrude the pressure sensor, so that the elevator door cannot be falsely triggered in the normal closing state.

[0015] Preferably, the inner ends of the two circular positioning rods are provided with springs, the ends of the springs away from the circular positioning rods are abutted against the ends of the inner walls of the first circular grooves, and the springs are used for providing a reset force for the circular positioning rods, so that the strip-shaped movable plate is reset and moved outward when the car door is opened, and the strip-shaped movable plate can be maintained in a pre-tightening state.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] 1. The elevator car door with the anti-pinch hand early warning structure can accurately perceive whether a hand or a foreign matter exists in the closing process of the car door through the mechanical transmission structure of the strip-shaped movable plate and the circular extrusion rod and the real-time detection function of the pressure sensor, the coverage range is the complete side of the car door, the risk that a small-area object is not detected in time is avoided, and the reliability of the anti-pinch hand function is significantly improved.

[0018] 2. The circular extrusion rod and the pressure sensor are installed in the rectangular fixed plate, the function failure problem caused by damage of an external environment is effectively avoided through further fixation and closed protection of the mounting plate, and the durability and anti-interference ability of the overall device are improved.

[0019] 3、The elevator car door with the anti-pinch hand early warning structure, the pressure sensor can directly detect the pressure signal transmitted by the circular extrusion rod and quickly feed back the abnormal signal to the control system, when detecting the pinch hand or foreign matter, the control system can quickly stop the closing action of the car door and open the door body in reverse, significantly shortening the reaction time, thereby effectively reducing the risk of passenger injury. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2 It is the partial structure schematic diagram one of the utility model;

[0022] Figure 3 It is the partial structure schematic diagram two of the utility device;

[0023] Figure 4 It is the partial structure schematic diagram three of the utility model;

[0024] Figure 5 It is the pre-tightening assembly structure schematic diagram in the utility model;

[0025] Figure 6 It is the assembly structure schematic diagram of the car door and pre-tightening assembly in the utility model;

[0026] Figure 7 It is the cross section structure schematic diagram of the car door in the utility model;

[0027] Figure 8 It is the cross section structure schematic diagram of the rectangular fixed plate in the utility model;

[0028] Figure 9 It is the partial structure schematic diagram of the pre-tightening assembly in the utility model;

[0029] In the drawing: 1, elevator;2, car door;20, U-shaped avoidance slot;21, rectangular mounting slot;22, mounting hole a;3, pre-tightening assembly;30, rectangular fixed plate;300, first circular groove;301, second circular groove;302, mounting groove;303, rectangular groove;304, mounting hole b;31, circular positioning rod;310, waist-shaped avoidance hole;32, strip-shaped movable plate;33, circular extrusion rod;34, pressure sensor;35, mounting plate;350, mounting hole c;36, first bolt;37, spring;38, second bolt;4, third bolt. DETAILED DESCRIPTION

[0030] Clearly and completely describe the technical scheme in the embodiments of the utility model with the drawings in the embodiments of the utility model below, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0031] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are the orientation or positional relationship shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0032] Please refer to Figures 1-9 The utility model provides a technical scheme:

[0033] The elevator car door with the hand-clamping-prevention early warning structure, including elevator 1, the front side of elevator 1 is equipped with two car doors 2 that are symmetrically arranged left and right, the opposite sides of the two car doors 2 are all provided with U-shaped avoiding grooves 20, and the U-shaped avoiding grooves 20 provide the sliding space for the strip-shaped movable plate 32, the side of the inner wall of the U-shaped avoiding groove 20 is provided with a rectangular mounting groove 21, the rectangular mounting groove 21 is equipped with a pre-tightening assembly 3, the pre-tightening assembly 3 includes a rectangular fixed plate 30, the rectangular fixed plate 30 is located in the rectangular mounting groove 21, the side of the rectangular fixed plate 30 and the position close to the upper and lower ends are all provided with first circular grooves 300, the two first circular grooves 300 are all slidably connected with circular positioning rods 31, and the first circular grooves 300 provide the sliding guide function for the circular positioning rods 31, and the circular positioning rods 31 make the strip-shaped movable plate 32 move left and right stably;

[0034] The outer ends of the two circular positioning rods 31 are commonly connected with the strip-shaped movable plate 32, the strip-shaped movable plate 32 can move left and right, one side of the strip-shaped movable plate 32 close to the rectangular fixed plate 30 is equipped with two circular extrusion rods 33 that are symmetrically arranged up and down, and the circular extrusion rods 33 transmit the movement of the strip-shaped movable plate 32 to the pressure sensor 34, so that the detection function of the hand-clamping event is realized;

[0035] The side of the rectangular fixed plate 30 and located between the two first circular grooves 300 are provided with two second circular grooves 301 arranged symmetrically up and down, and the two circular extrusion rods 33 are respectively connected in the two second circular grooves 301. The second circular groove 301 provides a sliding guide for the circular extrusion rod 33, ensuring the accuracy and stability of its movement. The left end of the rectangular fixed plate 30 and located between the two second circular grooves 301 are provided with mounting grooves 302. The two mounting grooves 302 are respectively provided with pressure sensors 34. The inside of the car door 2 and the rectangular fixed plate 30 are provided with wire grooves for the wires of the pressure sensor 34 to pass through. The pressure sensor 34 is electrically connected to the control system of the elevator through the wires. The pressure sensor 34 is used to detect the pressure applied by the circular extrusion rod 33. When an abnormal pressure is detected, a signal is fed back to the control system to stop the closing action of the elevator door and open the car door 2.

[0036] In this embodiment, the rear side of the car door 2 is provided with three mounting holes a22 arranged equidistantly up and down. The third bolt 4 is connected in the mounting hole a22. The threaded end of the third bolt 4 is threadedly connected to the rear side of the rectangular fixed plate 30. The third bolt 4 is used to firmly connect the car door 2 and the rectangular fixed plate 30, ensuring the stability of the pretightening assembly 3.

[0037] Specifically, the top of the rectangular fixed plate 30 is provided with a mounting hole b304. The second bolt 38 is connected in the mounting hole b304. The outer wall of the upper circular positioning rod 31 is provided with a waist-shaped avoiding hole 310 for the second bolt 38 to pass through. The threaded end of the second bolt 38 is threadedly connected to the bottom of the inner wall of the upper first circular groove 300. The second bolt 38 is used to limit the circular positioning rod 31, while allowing it to slide and adjust within a certain range, so that the strip-shaped movable plate 32 can move left and right.

[0038] Further, the front side of the rectangular fixed plate 30 is provided with two rectangular grooves 303. The two rectangular grooves 303 are respectively communicated with the two mounting grooves 302. The rectangular groove 303 is provided with a mounting plate 35. The mounting plate 35 is used to further fix the pressure sensor 34 and close the rectangular groove 303.

[0039] Further, the front side of the mounting plate 35 and close to the upper and lower ends are provided with mounting holes c350. The first bolt 36 is connected in the mounting hole c350. The threaded end of the first bolt 36 is threadedly connected to the rear side of the inner wall of the rectangular groove 303. The first bolt 36 is used to fix the mounting plate 35 in the rectangular groove 303, further enhancing the firmness of the overall structure.

[0040] Further, when the two car doors 2 are closed and there is no foreign matter between them, the end of the circular extrusion rod 33 is in contact with the detection end of the pressure sensor 34, and the end of the circular extrusion rod 33 does not extrude the pressure sensor 34, thereby ensuring that the elevator door does not trigger a false alarm in a normal closed state.

[0041] Further, the inner end of each of the two circular positioning rods 31 is provided with a spring 37, and the end of the spring 37 away from the circular positioning rod 31 is in abutment with the end of the inner wall of the first circular groove 300, and the spring 37 is used to provide a restoring force for the circular positioning rod 31, so that the strip-shaped movable plate 32 is restored to move outward when the car door 2 is opened, and the strip-shaped movable plate 32 is ensured to maintain a pre-tightening state.

[0042] The elevator car door with a hand pinching prevention and early warning structure in the embodiment is used in the following manner: when the elevator 1 starts to operate, the car door 2 is opened or closed, and when the car door 2 is closed, the strip-shaped movable plate 32 starts to slide in the U-shaped avoiding groove 20, the U-shaped avoiding groove 20 provides a moving space for the strip-shaped movable plate 32, the first circular groove 300 provides a sliding guide function for the circular positioning rod 31, so that the strip-shaped movable plate 32 can move smoothly left and right, and in the process of sliding of the strip-shaped movable plate 32, the two circular extrusion rods 33 slide accordingly, the second circular groove 301 provides a sliding guide rail for the circular extrusion rod 33, thereby ensuring the accuracy and stability of the movement of the circular extrusion rod 33, when the car door 2 encounters a foreign matter or pinches a hand during the closing process, the end of the circular extrusion rod 33 will extrude the pressure sensor 34, and then the pressure is transmitted to the pressure sensor 34, the pressure sensor 34 detects the abnormal pressure applied by the circular extrusion rod 33, and triggers a signal feedback to the control system of the elevator 1, and after receiving the signal, the control system will immediately stop the closing action of the car door 2 and open the car door 2 in the reverse direction, thereby effectively avoiding the occurrence of accidents such as hand pinching or damage to foreign matters, and in a normal case, when the two car doors 2 are closed and there is no foreign matter between them, the end of the circular extrusion rod 33 is in contact with the detection end of the pressure sensor 34, but does not extrude the pressure sensor 34, thereby ensuring that the pressure sensor 34 does not trigger a false alarm signal.

[0043] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An elevator car door with anti-pinch warning structure, comprising an elevator (1), the front side of the elevator (1) is provided with two car doors (2) which are symmetrically arranged left and right, characterized in that: The opposite sides of the two car doors (2) are provided with U-shaped avoiding grooves (20), the inner wall of the U-shaped avoiding grooves (20) is provided with a rectangular mounting groove (21), the pre-tightening assembly (3) is arranged in the rectangular mounting groove (21), the pre-tightening assembly (3) comprises a rectangular fixed plate (30), the rectangular fixed plate (30) is arranged in the rectangular mounting groove (21), the side of the rectangular fixed plate (30) and the positions close to the upper and lower ends are provided with first circular grooves (300), the two first circular grooves (300) are slidably connected with circular positioning rods (31), the outer ends of the two circular positioning rods (31) are connected with a strip-shaped movable plate (32), the side of the strip-shaped movable plate (32) close to the rectangular fixed plate (30) is provided with two circular extrusion rods (33) which are symmetrically arranged above and below, the side of the rectangular fixed plate (30) and the positions between the two first circular grooves (300) are provided with two second circular grooves (301) which are symmetrically arranged above and below, the two circular extrusion rods (33) are slidably connected in the two second circular grooves (301) respectively, the rectangular fixed plate (30) is provided with mounting grooves (302) at the positions of the left ends of the two second circular grooves (301), and the two mounting grooves (302) are provided with pressure sensors (34).

2. The elevator car door with pinch-resistant pre-warning structure of claim 1, wherein: The rear side of the car door (2) is provided with three mounting holes a (22) which are symmetrically arranged above and below, the mounting holes a (22) are connected with third bolts (4), and the threaded ends of the third bolts (4) are threadedly connected to the rear side of the rectangular fixed plate (30).

3. The elevator car door with pinch-resistant warning structure of claim 1, wherein: The top of the rectangular fixed plate (30) is provided with a mounting hole b (304), the mounting hole b (304) is connected with a second bolt (38), the outer wall of the upper circular positioning rod (31) is provided with a waist-shaped avoiding hole (310) through which the second bolt (38) passes, and the threaded end of the second bolt (38) is threadedly connected to the bottom of the inner wall of the upper first circular groove (300).

4. The elevator car door with pinch-resistant warning structure of claim 1, wherein: The front side of the rectangular fixed plate (30) is provided with two rectangular grooves (303), the two rectangular grooves (303) are communicated with the two mounting grooves (302) respectively, and the rectangular grooves (303) are provided with mounting plates (35).

5. The elevator car door with pinch-resistant warning structure of claim 4, wherein: The front side of the mounting plate (35) and the positions close to the upper and lower ends are provided with mounting holes c (350), the mounting holes c (350) are connected with first bolts (36), and the threaded ends of the first bolts (36) are threadedly connected to the rear side of the inner wall of the rectangular groove (303).

6. The elevator car door with pinch with early warning structure of claim 1, wherein: When the two car doors (2) are closed and there is no foreign matter between them, the end of the circular extrusion rod (33) is attached to the detection end of the pressure sensor (34), and the end of the circular extrusion rod (33) does not extrude the pressure sensor (34).

7. The elevator car door with pinch with early warning structure of claim 1, wherein: The inner ends of the two circular positioning rods (31) are provided with springs (37), and the ends, away from the circular positioning rods (31), of the springs (37) abut against the ends of the inner walls of the first circular grooves (300).

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