Elevator car safety anti-pinch device

Abstract

The present application relates to elevator technology field, and discloses a kind of elevator car safety anti-pinch equipment, including car body, guide bar being installed in the front side of car body, and elevator door sliding in guide bar, anti-pinch component one being equipped between the elevator door of both sides, the anti-pinch component one includes: metal frame layer, it is fixed in the inside of car body;Expansion plate, it is slidably arranged in the inside of metal frame layer;Expansion rod body, one end is hinged in the outside of expansion plate, and expansion rod body other end is hinged with elevator door, and drive expansion plate to move inwards and outwards during elevator opening and closing process.The present application is provided with the buffering effect of rubber shaft, and the body part is contacted and extruded by rubber shaft in advance, since rubber shaft can be extruded to support spring inwards, rubber shaft extrudes human body, can quickly extract body part, avoid being clamped, provide a reaction time, and make sliding friction into rolling friction, avoid the injury of human body.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, specifically to an elevator car safety anti-pinch device. Background Technology

[0002] An elevator is a permanent transportation device that serves several specific floors within a building. Its car moves on at least two rigid tracks that are perpendicular to the horizontal plane or have an angle of inclination of less than 15° to the vertical. Elevators often use sensors to achieve sensitive operation, especially during the opening and closing of elevator doors. However, if the sensors malfunction, the doors may close and clamp, potentially causing injury to people who are unaware of the situation.

[0003] The application, with application number 202210937317.2 and titled "Anti-Pinch Elevator Door," proposes the installation of an anti-pinch device. If a person is pinched, a sensor light will detect the pinch and trigger a controller to move a telescopic rod until it enters a recess and locks the two elevator doors. An anti-collision protection device is also installed to protect the two closed elevator doors from damage caused by a large impact. Finally, an anti-impact stabilization device is installed to stabilize the elevator to the ground as much as possible in the event of a fall, reducing injuries to personnel.

[0004] Even if the elevator door is locked by a sensor-activated controller, there is still a possibility that the elevator may malfunction and fall downwards, leaving the door open and posing a significant threat to people. Even with a buffering effect, it is difficult to guarantee that people will not be injured. Summary of the Invention

[0005] The purpose of this invention is to provide an elevator car safety anti-pinch device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an elevator car safety anti-pinch device, comprising a car body, a guide strip installed on the front side of the car body, and an elevator door sliding within the guide strip, wherein an anti-pinch component is provided between the two sides of the elevator door, the anti-pinch component comprising:

[0007] The metal frame layer is fixed inside the car body;

[0008] The telescopic plate is slidably disposed inside the metal frame layer;

[0009] The telescopic rod has one end hinged to the outside of the telescopic plate, and the other end hinged to the elevator door. During the opening and closing of the elevator, it drives the telescopic plate to move in the inward and outward directions, supporting the car body on the floor through the telescopic plate.

[0010] Preferably, a support guide is fixed to the inner side of the metal frame layer, and the telescopic plate is slidably mounted on the support guide.

[0011] The telescopic rods on both sides have springs inside and can be extended and retracted.

[0012] Preferably, the upper inner wall of the metal frame layer is provided with a first cavity and a second cavity. There are two first cavities, which are located on both sides of the second cavity. The first cavity and the second cavity are internally connected. The depth of the first cavity is shallower than the depth of the second cavity.

[0013] Preferably, a lubricating plate is fixedly fitted inside the first cavity, and the lubricating plate has a plurality of circular holes arranged in a row. A metal ball is held in the circular holes, one-third of the metal ball passes through the circular holes, and the lower end of the metal ball is pressed against the telescopic plate, while its upper end is pressed against the inner wall of the second cavity.

[0014] Preferably, the inner wall of the circular hole on the lubrication plate is arc-shaped, and the circular hole is wider at the top and narrower at the bottom. Its inner wall fits against the metal sphere, and both the outer wall of the metal sphere and the inner wall of the circular hole are smooth.

[0015] Preferably, the upper end of the metal frame layer is provided with a lubrication port that communicates with the cavity groove. The lubrication port can be opened and closed and is used to add lubricating oil.

[0016] Preferably, a circular sleeve is fixed to the outer end of the telescopic rod, an installation opening is provided on the edge of the elevator door, a separable limiting frame is fixed inside the installation opening, an inner shaft is vertically installed inside the limiting frame, and the circular sleeve is sleeved with the inner shaft.

[0017] Preferably, the edge of the elevator door is further provided with an anti-pinch component two, the anti-pinch component two including:

[0018] A rubber shaft is located at the edge of the elevator door, extending from the inside out, and retracts inward after clamping;

[0019] The compression shaft is located on the side of the rubber shaft and can rotate. After the human body is compressed, the shaft can rotate as the human body moves.

[0020] Preferably, the inner side of the elevator door has a recessed cavity, and the front and rear sides of the recessed cavity are clamped with limiting plates. The two limiting plates are connected to each other on their upper and lower sides. The rubber shaft is slidably disposed between the limiting plates and extends outward from between the two limiting plates.

[0021] The extrusion shaft is rotatably positioned at the edge of the limiting plate layer.

[0022] Preferably, T-shaped sliding openings are provided on the upper and lower inner sides of the two limiting plate layers, and T-shaped sliders are slidably arranged in the T-shaped sliding openings. A vertical support plate is fixed between the two T-shaped sliders, and the rubber shaft is also fixed between the two T-shaped sliders. The rubber shaft is located outside the support plate, and a support spring is fixed on the inner side of the support plate. The support spring abuts against the inner wall of the cavity.

[0023] The outer side of the single limiting plate layer is provided with a longitudinally extending arc-shaped cavity, and a rotating shaft is inserted inside the arc-shaped cavity. Threaded holes are provided on the inner walls of the upper and lower sides of the arc-shaped cavity. Bolts can be threaded into the threaded holes. The upper and lower ends of the rotating shaft extend into the threaded holes respectively, and the extrusion shaft is sleeved on the outside of the rotating shaft.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] (1) By setting up a telescopic plate, the telescopic plate is half located inside the metal frame layer and the other half located at the elevator entrance during the opening and closing process of the elevator door. When the elevator suddenly moves downward and the people do not move away, the telescopic plate mechanically blocks the downward movement, thus providing a protective function.

[0026] (2) The present invention avoids jamming of the telescopic plate by using the function of the metal ball. The addition of lubricant allows the lubricant to come into direct contact with the metal ball, making it easier for the metal ball to rotate and avoiding jamming.

[0027] (3) By setting the buffer effect of the rubber shaft, the rubber shaft comes into contact with the body part in advance and squeezes it. Since the rubber shaft can squeeze the spring inward, the rubber shaft squeezes the human body and can quickly pull out the body part to avoid being clamped, providing a reaction time.

[0028] (4) The present invention sets up a squeezing shaft to squeeze the human body. During the extraction process, the squeezing shaft is driven to rotate, so that the sliding friction is changed to rolling friction, thus avoiding injury to the human body. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the elevator door structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the anti-pinch component of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the metal frame layer of the present invention;

[0033] Figure 5This is a schematic diagram of the lubrication plate structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the end structure of the telescopic rod of the present invention;

[0035] Figure 7 This is a schematic diagram of the anti-pinch component two of the present invention;

[0036] Figure 8 For the present invention Figure 7 A magnified schematic diagram of part A in the diagram.

[0037] In the diagram: 1. Car body; 2. Guide bar; 3. Elevator door; 31. Cavity; 4. Anti-pinch component one; 41. Metal frame layer; 411. Cavity groove one; 412. Cavity groove two; 413. Lubrication port; 42. Telescopic plate; 43. Lubrication plate; 431. Circular hole; 432. Metal sphere; 44. Guide frame; 45. Telescopic rod; 451. Mounting port; 452. Circular sleeve; 453. Limiting frame; 454. Inner shaft; 5. Anti-pinch component two; 51. Limiting plate layer; 52. T-shaped sliding mouth; 53. T-shaped slider; 54. Support plate; 55. Rubber shaft; 56. Support spring; 57. Extrusion shaft; 571. Arc-shaped cavity; 572. Rotating shaft; 573. Threaded hole. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1-8 ,

[0040] Example 1:

[0041] This invention provides a technical solution: an elevator car safety anti-pinch device, comprising a car body 1, a guide strip 2 installed on the front side of the car body 1, and an elevator door 3 sliding within the guide strip 2, with an anti-pinch component 4 provided between the two elevator doors 3, the anti-pinch component 4 comprising:

[0042] Metal frame layer 41, which is fixed inside the car body 1;

[0043] The telescopic plate 42 is slidably disposed inside the metal frame layer 41;

[0044] The telescopic rod 45 has one end hinged to the outside of the telescopic plate 42, and the other end of the telescopic rod 45 is hinged to the elevator door 3. During the opening and closing of the elevator, the telescopic plate 42 is driven to move in the inward and outward directions, so that the car body 1 is supported on the floor by the telescopic plate 42.

[0045] A guide frame 44 for support is fixed on the inner side of the metal frame layer 41, and a telescopic plate 42 is slidably mounted on the guide frame 44.

[0046] The telescopic rods 45 on both sides have springs inside and can be telescopically extended. When the elevator door 3 is opening, the telescopic rods 45 are stretched and pulled outward. Similarly, when closing, the telescopic rods 45 are contracted and moved inward.

[0047] The upper inner wall of the metal frame layer 41 is provided with a first cavity 411 and a second cavity 412. There are two first cavities 411, which are located on both sides of the second cavity 412. The first cavity 411 and the second cavity 412 are connected internally. The depth of the first cavity 411 is shallower than the depth of the second cavity 412, so that the metal ball 432 can be placed inside the second cavity 412 to achieve rolling friction. The first cavity 411 is used to fix the lubricating plate 43 and prevent the lubricating plate 43 from being squeezed by the telescopic plate 42 to achieve rolling friction.

[0048] A lubricating plate 43 is fixedly fitted inside the cavity 411. The lubricating plate 43 has multiple arranged circular holes 431. A metal ball 432 is held in the circular holes 431. One-third of the metal ball 432 passes through the circular hole 431. The lower end of the metal ball 432 is pressed against the telescopic plate 42, and its upper end is pressed against the inner wall of the cavity 412. The lubricating plate 43 is mainly used to limit the position of the metal ball 432, so that the metal ball 432 does not move excessively and its position does not change, thus achieving a supporting function and preventing the metal frame layer 41 from deforming too much.

[0049] The inner wall of the circular hole 431 on the lubrication plate 43 is arc-shaped and is wider at the top and narrower at the bottom. Its inner wall fits against the metal ball 432. The outer wall of the metal ball 432 and the inner wall of the circular hole 431 are both smooth, so that the metal ball 432 can achieve a good rolling action.

[0050] The upper end of the metal frame layer 41 is provided with a lubrication port 413 that communicates with the cavity 412. The lubrication port 413 can be opened and closed. It is used to add lubricating oil to prevent the metal ball 432 from rusting and to achieve better rolling. The telescopic plate 42, which is repeatedly stepped on and causes stains on the surface, can also make the metal ball 432 roll on its surface.

[0051] A circular sleeve 452 is fixed to the outer end of the telescopic rod 45. An installation opening 451 is provided on the edge of the elevator door 3. A separable limiting frame 453 is fixed inside the installation opening 451. An inner shaft 454 is vertically installed inside the limiting frame 453. The circular sleeve 452 is sleeved with the inner shaft 454 to limit the end of the telescopic rod 45, thereby achieving the function of limiting and pulling.

[0052] During the movement of the elevator car 1, it will stop at different floors and open the elevator door 3. During the opening and closing process, the elevator door 3 will drive the telescopic rod 45 to open. At the same time, during the opening process, a pulling force will be applied to the telescopic plate 42, causing it to move outward and extend outward. Half of the telescopic plate 42 will be located inside the metal frame layer 41, and the other half will be located at the elevator entrance. If the elevator suddenly moves downward and the people do not move away, the telescopic plate 42 will act as a mechanical barrier to prevent downward movement, thus providing a protective function. Conversely, when the elevator door 3 closes, it will push the telescopic rod 45 to move and push the telescopic plate 42 back to avoid affecting the movement.

[0053] Secondly, the lubrication plate 43 provides support for the lower telescopic plate 42 by the metal ball 432. When personnel walk on the metal frame layer 41, the metal frame layer 41 is caused to sink downwards, which compresses the telescopic plate 42. However, due to the action of the metal ball 432, even when it sinks downwards, it is still in a state of rolling friction, thus preventing the telescopic plate 42 from getting stuck. Furthermore, the lubricant installed in the lubrication port 413 allows the lubricant to directly contact the metal ball 432, making it easier for the metal ball 432 to rotate and preventing it from getting stuck.

[0054] Example 2:

[0055] Based on Embodiment 1, the edge of the elevator door 3 is further provided with an anti-pinch component 2 5, which includes:

[0056] A rubber shaft 55 is located at the edge of the elevator door 3, extending from the inside to the outside, and retracts inward after being clamped;

[0057] The extrusion shaft 57 is located on the side of the rubber shaft 55 and can rotate. After the human body is extruded, the shaft can rotate as the human body moves.

[0058] The inner side of the elevator door 3 has a cavity 31, and the front and rear sides of the cavity 31 are clamped with limiting plates 51. The two limiting plates 51 are connected to each other on the upper and lower sides. The rubber shaft 55 is slidably disposed between the limiting plates 51 and extends outward from between the two limiting plates 51.

[0059] The extrusion shaft 57 is rotatably positioned at the edge of the limiting plate layer 51.

[0060] T-shaped sliding openings 52 are provided on the upper and lower inner sides of the two limiting plate layers 51. T-shaped sliders 53 are slidably arranged in the T-shaped sliding openings 52. A vertical support plate 54 is fixed between the two T-shaped sliders 53. A rubber shaft 55 is also fixed between the two T-shaped sliders 53. The rubber shaft 55 is located outside the support plate 54. A support spring 56 is fixed inside the support plate 54. The support spring 56 abuts against the inner wall of the cavity 31. The rubber shaft 55 is pushed out and then squeezed to generate compression, which is equivalent to having a buffering effect. Under this buffering effect, even if the human body is clamped, it can still be quickly pulled out to avoid being clamped.

[0061] The outer side of the single limiting plate layer 51 is provided with a longitudinally extending arc-shaped cavity 571. A rotating shaft 572 is inserted inside the arc-shaped cavity 571. Threaded holes 573 are provided on the inner walls of both the upper and lower sides of the arc-shaped cavity 571. Bolts can be threaded into the threaded holes 573. The upper and lower ends of the rotating shaft 572 extend into the threaded holes 573 respectively. A compression shaft 57 is sleeved on the rotating shaft 572. When the human body is compressed, the compression shaft 57 can rotate to pull the human body out. At the same time, the compression shaft 57 is made of rubber, which can reduce the injury caused by compression.

[0062] During the closing process of elevator door 3, the body parts of the person are clamped. The rubber shaft 55 makes contact with and squeezes the body parts in advance, giving the person time to react. Since the rubber shaft 55 can squeeze the support spring 56 inward, the rubber shaft 55 can squeeze the human body and quickly pull the body parts out to avoid being clamped, providing a reaction time.

[0063] Secondly, since the rubber shaft 55 is round and the compression shaft 57 is also round and can rotate, the compression shaft 57 compresses the human body. During the extraction process, the human body drives the compression shaft 57 to rotate, thus changing sliding friction into rolling friction and avoiding injury to the human body. Furthermore, the compression shafts 57 on both sides will compress each other during the closing of the elevator door 3, making them prone to deformation and difficult to recover. However, by removing the bolt inside the threaded hole 573, the rotating shaft 572 can be removed outward, allowing the compression shaft 57 to be removed and replaced, which facilitates operation.

[0064] The aforementioned anti-pinch component 2 5 plays a significant role in the failure of the elevator door 3's sensing function, preventing the human body from being trapped and harmed.

[0065] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator car safety anti-pinch device, comprising a car body (1), a guide strip (2) installed on the front side of the car body (1), and an elevator door (3) sliding within the guide strip (2), characterized in that: An anti-pinch component (4) is provided between the two elevator doors (3), the anti-pinch component (4) comprising: A metal frame layer (41) is fixed inside the car body (1); Telescopic plate (42), which is slidably disposed inside the metal frame layer (41); The telescopic rod (45) has one end hinged to the outside of the telescopic plate (42), and the other end of the telescopic rod (45) is hinged to the elevator door (3). During the opening and closing of the elevator, the telescopic plate (42) is driven to move in the inward and outward directions, and the car body (1) is supported on the floor by the telescopic plate (42). The inner side of the metal frame layer (41) is fixed with a guide frame (44) for support, and the telescopic plate (42) is slidably disposed on the guide frame (44); The telescopic rods (45) on both sides have springs inside and can be telescopically extended; The outer end of the telescopic rod (45) is fixed with a round sleeve (452), and the edge of the elevator door (3) is provided with an installation port (451). A separable limiting frame (453) is fixed in the installation port (451), and an inner shaft (454) is vertically installed in the limiting frame (453). The round sleeve (452) and the inner shaft (454) are sleeved together.

2. The elevator car safety anti-pinch device according to claim 1, characterized in that: The upper inner wall of the metal frame layer (41) is provided with a first cavity (411) and a second cavity (412). There are two first cavities (411), which are located on both sides of the second cavity (412). The interiors of the first cavity (411) and the second cavity (412) are connected. The depth of the first cavity (411) is shallower than the depth of the second cavity (412).

3. The elevator car safety anti-pinch device according to claim 2, characterized in that: A lubricating plate (43) is fixedly fitted inside the first cavity (411). The lubricating plate (43) has a plurality of circular holes (431) arranged in a row. A metal ball (432) is held in the circular hole (431). One-third of the metal ball (432) passes through the circular hole (431). The lower end of the metal ball (432) is pressed against the telescopic plate (42), and its upper end is pressed against the inner wall of the second cavity (412).

4. The elevator car safety anti-pinch device according to claim 3, characterized in that: The inner wall of the circular hole (431) on the lubrication plate (43) is arc-shaped, and the circular hole (431) is larger at the top and smaller at the bottom. Its inner wall is in contact with the metal sphere (432). The outer wall of the metal sphere (432) and the inner wall of the circular hole (431) are both smooth.

5. The elevator car safety anti-pinch device according to claim 3, characterized in that: The upper end of the metal frame layer (41) is provided with a lubrication port (413) that communicates with the cavity groove (412). The lubrication port (413) can be opened and closed and is used to add lubricating oil.

6. The elevator car safety anti-pinch device according to claim 1, characterized in that: The edge of the elevator door (3) is also provided with an anti-pinch component two (5), the anti-pinch component two (5) including: A rubber shaft (55) is located at the edge of the elevator door (3), extending from the inside to the outside, and retracting inward after being clamped; The extrusion shaft (57) is located on the side of the rubber shaft (55) and can rotate. It can rotate when the human body is extruded.

7. The elevator car safety anti-pinch device according to claim 6, characterized in that: The elevator door (3) has a recessed cavity (31) on its inner side. The recessed cavity (31) is sandwiched between two limiting plates (51) on its front and rear sides. The two limiting plates (51) are connected to each other on their upper and lower sides. The rubber shaft (55) is slidably disposed between the limiting plates (51) and extends outward from between the two limiting plates (51). The extrusion shaft (57) is rotatably positioned at the edge of the limiting plate layer (51).

8. The elevator car safety anti-pinch device according to claim 7, characterized in that: T-shaped sliding openings (52) are provided on the upper and lower inner sides of the two limiting plate layers (51). T-shaped sliders (53) are slidably provided in the T-shaped sliding openings (52). A vertical support plate (54) is fixed between the two T-shaped sliders (53). The rubber shaft (55) is also fixed between the two T-shaped sliders (53). The rubber shaft (55) is located outside the support plate (54). A support spring (56) is fixed on the inner side of the support plate (54). The support spring (56) abuts against the inner wall of the cavity (31). The outer side of the single limiting plate layer (51) is provided with a longitudinally extending arc-shaped cavity (571). A rotating shaft (572) is inserted inside the arc-shaped cavity (571). A through threaded hole (573) is provided on the inner wall of the upper and lower sides of the arc-shaped cavity (571). A bolt can be threaded into the threaded hole (573). The upper and lower ends of the rotating shaft (572) extend into the threaded hole (573) respectively. The extrusion shaft (57) is sleeved on the outside of the rotating shaft (572).

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