Anti-pinch structure of elevator door

Abstract

The utility model relates to the technical field of elevators, in particular to an anti-pinch structure of an elevator door, which comprises a guide rail and an elevator door plate. A cavity is formed in the elevator door plate, and a limiting assembly is installed in the cavity. A brake button is also mounted in the cavity; an anti-pinch strip plate is arranged on the opening and closing side of the elevator door plate, and a sliding plate is fixedly connected to the anti-pinch strip plate. The middle position of the anti-pinch strip plate is fixedly connected with a pressing and touching assembly. According to the utility model, the brake button is matched with the touch component, so that the brake system of the elevator door directly controls the elevator door plate to be opened after the elevator door plate clamps an object, and the elevator door plate is more reliable compared with the inductive control of a sensor; and by arranging a block assembly in the guide rail and arranging a limiting assembly matched with the anti-pinch strip plate for use in the elevator door plate, the elevator door plate is mechanically limited in real time after the elevator door plate clamps the object, and the use safety of the elevator is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to an anti-pinch structure for elevator doors. Background Art

[0002] An elevator is a device used to transport people and objects vertically. It is usually installed inside a building to quickly and conveniently transport people and objects from one floor to another. When taking an elevator, you need to keep a safe distance, do not rush in when the elevator door is closed, do not try to enter or leave the elevator when the elevator door is not fully opened, and do not touch the elevator door or operating buttons at will during the operation of the elevator.

[0003] At present, the elevator door is usually equipped with infrared or other photoelectric sensors. When an object or person blocks the light beam, the elevator door will automatically stop closing or reopen to avoid pinching passengers. And the elevator door is usually equipped with a reverse force detector. When the elevator door is closing, if resistance or pressure beyond the safe range is detected, the elevator door will automatically stop closing or reopen. In general, the anti-pinch function of the elevator door is usually achieved through various sensors to ensure that passengers will not be pinched when riding the elevator.

[0004] However, the above patent still has the following deficiencies during use:

[0005] In actual use, sensor failure may still occur. For example, the sensing part of the sensor may be covered by dust, stains or other debris, resulting in sensing failure; there may be electromagnetic interference sources around the elevator, affecting the normal operation of the sensor, etc. In these cases, the sensor may not be able to accurately sense the blocking object, resulting in the failure of the anti-pinch function.

[0006] Therefore, it is necessary to design an elevator door anti-pinch structure to solve the problem that the elevator door anti-pinch function fails when the sensor fails. Utility Model Content

[0007] The purpose of the utility model is to provide an elevator door anti-pinch structure to solve the problems raised in the above background technology.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] An elevator door anti-pinch structure comprises a guide rail fixedly mounted on the top and bottom surfaces of an elevator door and an elevator door panel slidably mounted between two of the guide rails, two symmetrically distributed pulley grooves are arranged on the connecting side of the guide rail and the elevator door panel, and an installation groove is opened between the two pulley grooves, and a plurality of groups of blocking components are arranged in an array along the length direction of the installation groove;

[0010] A cavity is provided in the elevator door panel at a position close to the opening and closing side, and a group of limit components are fixedly installed in the cavity at positions close to the top and bottom ends thereof, and the limit components are used to cooperate with the blocking components in the guide rail to limit the closing sliding movement between the elevator door panel and the guide rail; a mounting seat is also fixedly installed in the cavity, and a brake button electrically connected to the brake system of the elevator door is fixedly installed in the mounting seat, and the brake button is used to control the elevator door brake system to control the elevator door panel to perform an opening sliding movement when pressed;

[0011] The opening and closing sides of the elevator door panel are provided with anti-pinching strips, and slide plates are fixedly connected to the side of the anti-pinching strips close to the elevator door panel at positions close to both ends thereof, and the end of the slide plate away from the anti-pinching strip plate slides through the elevator door panel to the cavity, and a driving block used in conjunction with the limit assembly is fixedly installed on the side of the slide plate close to the corresponding limit assembly;

[0012] A touch component used in conjunction with the brake button is fixedly connected to the middle position of the side of the anti-pinch strip plate close to the elevator door panel, and the touch component slides through the elevator door panel into the cavity at one end away from the anti-pinch strip plate.

[0013] Furthermore, the touch assembly includes a sliding rod fixedly installed in the middle position of the side surface of the anti-pinch strip plate, the sliding rod is aligned with the brake button, the end of the sliding rod away from the anti-pinch strip plate slides through the elevator door panel into the cavity, and a baffle is fixedly installed on the end of the sliding rod located in the cavity, a second spring mounted on the periphery of the sliding rod is fixedly connected between the baffle plate and the side surface of the cavity, and a first spring mounted on the periphery of the sliding rod is fixedly connected between the anti-pinch strip plate and the elevator door panel.

[0014] Further, the blocking assembly includes a rotating shaft rotatably installed between the two sides of the installation groove and a limiting roller fixedly connected between the two sides of the installation groove, a blocking plate is fixedly connected to the periphery of the rotating shaft, and an inclined third spring is fixedly connected between the side surface of the blocking plate and the inner end surface of the installation groove, and under the elastic support of the third spring, the middle part of the other side of the blocking plate is located in compression contact with the periphery of the limiting roller, and the end of the blocking plate away from the rotating shaft is in compression contact with the elevator door panel;

[0015] The limiting roller is located on a side of the baffle plate close to the closing sliding direction of the elevator door panel, and the angle between the baffle plate and the elevator door panel is an acute angle.

[0016] Furthermore, the limit assembly includes a through hole that passes through the cavity and the mounting groove, and a fixed seat fixedly mounted on the side of the cavity, a plug rod is slidably mounted through the fixed seat, and a fourth spring sleeved on the periphery of the plug rod is fixedly connected between the end surface of the cavity and the fixed seat;

[0017] A ball is embedded and installed at one end of the insertion rod close to the driving block, and the other end of the insertion rod is slidably inserted in the through hole;

[0018] Under the elastic force of the fourth spring, the insertion rod is in extrusion rolling contact with the slide plate through the ball, and the end of the insertion rod away from the ball is in the through hole.

[0019] Furthermore, the driving block is located on a side of the insertion rod close to the anti-pinching strip plate;

[0020] The cross section of the driving block is a right-angle trapezoid, and the inclined surface of the driving block is located on the side close to the insertion rod, and the top surface and the inclined surface of the driving block are provided with limiting grooves.

[0021] Beneficial effects of the utility model:

[0022] In the utility model, the brake button and the touch assembly are arranged in coordination, so that after the elevator door panel is clamped by an object, the brake system of the elevator door can directly control the elevator door panel to open, which is more reliable than the inductive control of the sensor; and by arranging a blocking assembly in the guide rail and a limiting assembly used in coordination with the anti-pinch strip in the elevator door panel, the elevator door panel can be immediately mechanically limited after being clamped by an object, thereby effectively avoiding the situation of being clamped, solving the problem that the anti-pinch function of the elevator door panel will fail when the sensor fails, and improving the safety of elevator use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the structure of the anti-pinching strip in the utility model when it is not compressed;

[0025] Figure 2 yes Figure 1 A magnified view of part B;

[0026] Figure 3 yes Figure 1 A magnified view of part A;

[0027] Figure 4 It is a structural schematic diagram of the guide rail of the utility model;

[0028] Figure 5 It is a schematic diagram of the structure of the anti-pinching strip in the utility model when it is under pressure;

[0029] Figure 6 yes Figure 4Enlarged view of part C;

[0030] The reference numerals are as follows:

[0031] 1- elevator door panel, 3- guide rail, 4- cavity, 5- anti-pinching strip, 6- slide plate, 7- baffle, 8- slide bar, 9- first spring, 10- second spring, 11- mounting seat, 12- brake button, 13- third spring, 14- baffle, 15- limiting roller, 16- rotating shaft, 17- mounting groove, 18- fixed seat, 19- fourth spring, 20- driving block, 21- limiting groove, 22- plug rod, 23- ball, 24- pulley groove. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example:

[0034] See also Figures 1 to 6 In an embodiment of the utility model, an elevator door anti-pinch structure comprises a guide rail 3 fixedly mounted on the top and bottom surfaces of an elevator door and an elevator door panel 1 slidably mounted between the two guide rails 3, characterized in that two symmetrically distributed pulley grooves 24 are arranged on the connecting side of the guide rail 3 and the elevator door panel 1, and an installation groove 17 is opened between the two pulley grooves 24, and a plurality of groups of blocking components are arranged in an array along the length direction of the installation groove 17;

[0035] A cavity 4 is provided in the elevator door panel 1 near the opening and closing side, and a set of limit components are fixedly installed in the cavity 4 near the top and bottom ends thereof, and the limit components are used to cooperate with the blocking components in the guide rail 3 to limit the closing sliding movement between the elevator door panel 1 and the guide rail 3; a mounting seat 11 is also fixedly installed in the cavity 4, and a brake button 12 electrically connected to the brake system of the elevator door is fixedly installed in the mounting seat 11, and the brake button 12 is used to control the elevator door brake system to control the elevator door panel 1 to perform an opening sliding movement when it is pressed;

[0036] An anti-pinching strip 5 is provided on the opening and closing side of the elevator door panel 1, and a slide plate 6 is fixedly connected to the side of the anti-pinching strip 5 close to the elevator door panel 1 at positions close to both ends thereof, and the end of the slide plate 6 away from the anti-pinching strip 5 slides through the elevator door panel 1 to the cavity 4, and a driving block 20 used in conjunction with the limit assembly is fixedly installed on the side of the slide plate 6 close to the corresponding limit assembly;

[0037] A touch component used in conjunction with the brake button 12 is fixedly connected to the middle position of the side of the anti-pinch strip 5 close to the elevator door panel 1, and the end of the touch component away from the anti-pinch strip 5 slides through the elevator door panel 1 to the cavity 4.

[0038] Among them, the touch assembly includes a sliding rod 8 fixedly installed in the middle position of the side of the anti-pinch strip 5, the sliding rod 8 is aligned with the brake button 12, the end of the sliding rod 8 away from the anti-pinch strip 5 slides through the elevator door panel 1 to the cavity 4, and the end of the sliding rod 8 located in the cavity 4 is fixedly installed with a baffle 7, and a second spring 10 arranged on the periphery of the sliding rod 8 is fixedly connected between the baffle 7 and the side of the cavity 4, and a first spring 9 arranged on the periphery of the sliding rod 8 is fixedly connected between the anti-pinch strip 5 and the elevator door panel 1.

[0039] The blocking assembly includes a rotating shaft 16 rotatably mounted between the two sides of the mounting groove 17 and a limiting roller 15 fixedly connected between the two sides of the mounting groove 17. A blocking plate 14 is fixedly connected to the periphery of the rotating shaft 16. An inclined third spring 13 is fixedly connected between the side surface of the blocking plate 14 and the inner end surface of the mounting groove 17. Under the elastic support of the third spring 13, the middle part of the other side of the blocking plate 14 is located in compression contact with the periphery of the limiting roller 15, and the end of the blocking plate 14 away from the rotating shaft 16 is in compression contact with the elevator door panel 1.

[0040] The limiting roller 15 is located on a side of the baffle plate 14 close to the closing sliding direction of the elevator door panel 1, and the angle between the baffle plate 14 and the elevator door panel 1 is an acute angle.

[0041] The limiting assembly includes a through hole that passes through the cavity 4 and the mounting groove 17, and a fixing seat 18 fixedly installed on the side of the cavity 4. A plug rod 22 is slidably installed through the fixing seat 18, and a fourth spring 19 sleeved on the periphery of the plug rod 22 is fixedly connected between the end surface of the cavity 4 and the fixing seat 18;

[0042] A ball 23 is embedded and installed at one end of the insertion rod 22 close to the driving block 20, and the other end of the insertion rod 22 is slidably inserted in the through hole;

[0043] Under the elastic force of the fourth spring 19 , the insertion rod 22 is in extrusion rolling contact with the slide plate 6 through the ball 23 , and the end of the insertion rod 22 away from the ball 23 is in the through hole.

[0044] The driving block 20 is located on a side of the insertion rod 22 close to the anti-pinching strip plate 5;

[0045] The cross section of the driving block 20 is a right-angled trapezoid, and the inclined surface of the driving block 20 is located on the side close to the insertion rod 22 . The top surface and the inclined surface of the driving block 20 are provided with a limiting groove 21 .

[0046] When the utility model is in use:

[0047] When the elevator door panel 1 is clamped by an object, the anti-clamping strip plate 5 is subjected to pressure, and the anti-clamping strip plate 5 moves in the direction close to the elevator door panel 1. During the process, the slide plate 6 and the slide rod 8 both slide into the cavity 4. During the movement of the slide plate 6, the ball 23 will contact the drive block 20 and reach the top surface of the drive block 20 along the inclined surface of the limit groove 21. At this time, the insertion rod 22 is lifted for a distance, so that the end of the insertion rod 22 away from the ball 23 extends to the installation groove 17 through the through hole. At this time, the end of the insertion rod 22 located in the installation groove 17 will be located between the two baffle plates 14. When the elevator door panel 1 continues to close, the baffle plate 14 on the right side of the insertion rod 22 blocks the insertion rod 22, thereby preventing the elevator door panel 1 from continuing to close;

[0048] At the same time, as the slide bar 8 moves, the baffle plate 7 presses the brake button 12, so that the brake system of the elevator door causes the elevator door panel 1 to slide and open.

[0049] In the blocking assembly, a ratchet structure is formed between the third spring 13, the rotating shaft 16, the limiting roller 15 and the blocking plate 14 and the insertion rod 22, thereby preventing the elevator door panel 1 from sliding closed without affecting the opening and sliding of the elevator door panel 1;

[0050] As the elevator door panel 1 opens and slides, the anti-pinch strip 5 will separate from the clamped object. During the separation process, the elastic force of the first spring 9 and the second spring 10 will reset the anti-pinch strip 5 and the elevator door panel 1 through the slide rod 8. At the same time, the elastic force of the fourth spring 19 will reset the insertion rod 22 and the slide plate 6, thereby resetting the anti-pinch structure.

[0051] In the utility model, the brake button 12 is arranged in coordination with the touch assembly, so that after the elevator door panel 1 is clamped by an object, the brake system of the elevator door directly controls the elevator door panel 1 to open, which is more reliable than the inductive control of the sensor; and by arranging a blocking assembly in the guide rail 3 and a limiting assembly used in coordination with the anti-pinch strip 5 in the elevator door panel 1, the elevator door panel 1 is immediately mechanically limited after being clamped by an object, thereby effectively avoiding the situation of being clamped; the problem that the anti-pinch function of the elevator door panel 1 will fail when the sensor fails is solved, thereby improving the safety of elevator use.

[0052] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An elevator door anti-pinch structure, comprising guide rails (3) fixedly mounted on the top and bottom surfaces of an elevator door and an elevator door panel (1) slidably mounted between two of the guide rails (3), characterized in that: The connecting side of the guide rail (3) and the elevator door panel (1) is provided with two symmetrically distributed pulley grooves (24), and an installation groove (17) is provided between the two pulley grooves (24), and a plurality of groups of blocking components are installed in an array along the length direction of the installation groove (17); A cavity (4) is provided in the elevator door panel (1) at a position close to the opening and closing side, and a group of limit components are fixedly installed in the cavity (4) at positions close to the top and bottom ends thereof, and the limit components are used to cooperate with the blocking components in the guide rail (3) to limit the closing sliding movement between the elevator door panel (1) and the guide rail (3); a mounting seat (11) is also fixedly installed in the cavity (4), and a brake button (12) electrically connected to the brake system of the elevator door is fixedly installed in the mounting seat (11), and the brake button (12) is used to control the elevator door brake system to control the elevator door panel (1) to perform an opening sliding movement when the brake button (12) is pressed; The opening and closing sides of the elevator door panel (1) are provided with an anti-pinching strip plate (5), and slide plates (6) are fixedly connected to the side of the anti-pinching strip plate (5) close to the elevator door panel (1) at positions close to both ends thereof, and the end of the slide plate (6) away from the anti-pinching strip plate (5) slides through the elevator door panel (1) into the cavity (4), and a driving block (20) used in conjunction with the limit assembly is fixedly installed on the side of the slide plate (6) close to the corresponding limit assembly; A touch component used in conjunction with the brake button (12) is fixedly connected to the middle of the side of the anti-pinch strip (5) close to the elevator door panel (1), and the end of the touch component away from the anti-pinch strip (5) slides through the elevator door panel (1) to the cavity (4).

2. An elevator door anti-pinch structure according to claim 1, characterized in that: The touch assembly comprises a slide bar (8) fixedly mounted at a middle position of a side surface of the anti-pinch strip plate (5), the slide bar (8) being aligned with the brake button (12), the end of the slide bar (8) away from the anti-pinch strip plate (5) slidingly passing through the elevator door panel (1) to the cavity (4), and a baffle plate (7) being fixedly mounted on the end of the slide bar (8) located in the cavity (4), a second spring (10) sleeved on the periphery of the slide bar (8) being fixedly connected between the baffle plate (7) and the side surface of the cavity (4), and a first spring (9) sleeved on the periphery of the slide bar (8) being fixedly connected between the anti-pinch strip plate (5) and the elevator door panel (1).

3. The elevator door anti-pinch structure according to claim 1, characterized in that: The blocking assembly comprises a rotating shaft (16) rotatably mounted between two sides of the mounting groove (17) and a limiting roller (15) fixedly connected between two sides of the mounting groove (17); a blocking plate (14) is fixedly connected to the periphery of the rotating shaft (16); an inclined third spring (13) is fixedly connected between the side surface of the blocking plate (14) and the inner end surface of the mounting groove (17); under the elastic support of the third spring (13), the middle part of the other side of the blocking plate (14) is located in compression contact with the periphery of the limiting roller (15), and the end of the blocking plate (14) away from the rotating shaft (16) is in compression contact with the elevator door panel (1); The limiting roller (15) is located on a side of the baffle plate (14) close to the closing sliding direction of the elevator door panel (1), and the angle between the baffle plate (14) and the elevator door panel (1) is an acute angle.

4. The elevator door anti-pinch structure according to claim 1, characterized in that: The limit assembly comprises a through hole that passes through the cavity (4) and the mounting groove (17), and a fixed seat (18) fixedly mounted on the side of the cavity (4); an insertion rod (22) is slidably mounted through the fixed seat (18); and a fourth spring (19) sleeved on the periphery of the insertion rod (22) is fixedly connected between the end surface of the cavity (4) and the fixed seat (18); A ball (23) is embedded and installed at one end of the insertion rod (22) close to the driving block (20), and the other end of the insertion rod (22) is slidably inserted in the through hole; Under the elastic force of the fourth spring (19), the insertion rod (22) is in extrusion rolling contact with the slide plate (6) through the ball (23), and the end of the insertion rod (22) away from the ball (23) is located in the through hole.

5. The elevator door anti-pinch structure according to claim 4, characterized in that: The driving block (20) is located on a side of the insertion rod (22) close to the anti-pinching strip plate (5); The cross section of the driving block (20) is a right-angled trapezoid, and the inclined surface of the driving block (20) is located on a side close to the insertion rod (22), and a limiting groove (21) is provided on the top surface and the inclined surface of the driving block (20).

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