Stop device and lift

Abstract

The present invention discloses a stop device and an elevator. The stop device rises and falls synchronously with the lifting track, and includes an axle seat, a stop rod and an elastic part. The axle seat is arranged above the lifting track at intervals. The stop rod includes a pressing part and a stop part arranged up and down, and a rotating part connected therebetween. The pressing part and the stop part form an angle with an opening toward the inner side of the lifting track. The rotating part is pivotally connected to the axle seat through a first shaft, and the stop rod can swing around the axis of the first shaft to switch between a first position and a second position. In the first position, the angle between the pressing part and the horizontal plane is an acute angle, and the stop part is inclined toward the inner side of the lifting track to stop the overhead crane. In the second position, the stop part swings toward the outer side of the lifting track to release the overhead crane. The elastic part is used to limit the stop rod to the first position when the pressing part is not pressed. When the pressing part is pressed, the elastic part elastically deforms and allows the stop rod to move to the second position.

Description

Technical Field

[0001] The present application relates to the technical field of semiconductor transmission systems, and in particular to a stop device and an elevator. Background Art

[0002] During semiconductor processing, an overhead crane is required to transport wafer cassettes loaded with wafers between various process tools. To conserve floor space, the overhead crane typically travels along a suspended work track. To install the overhead crane on the work track, the crane must first be mounted on a lifting track. The lifting track and the crane are then raised using an elevator. Once the lifting track is raised to the same height as the overhead crane's work track and docked, the crane moves from the lifting track to the work track. However, if the lifting track tilts during this process, the crane can easily fall from the lifting track. Summary of the Invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a stop device and an elevator. The stop device uses a purely mechanical structure to achieve the stopping and releasing of the overhead crane on the lifting track, with a simple structure and high safety.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a stop device, which rises and falls synchronously with the lifting track, and the stop device includes:

[0005] Axle seats, the axle seats are arranged above the lifting track at intervals;

[0006] The blocking rod comprises a pressing portion and a stopping portion arranged in an upper and lower manner and a rotating portion connected therebetween, the pressing portion and the stopping portion forming an angle with an opening facing the inner side of the lifting track, the rotating portion being pivotally connected to the axle seat via a first shaft, and the blocking rod being able to swing around the axis of the first shaft to switch between a first position and a second position; in the first position, the angle between the pressing portion and the horizontal plane is an acute angle, and the stopping portion is inclined toward the inner side of the lifting track to stop the overhead travelling vehicle; in the second position, the stopping portion swings toward the outer side of the lifting track to release the overhead travelling vehicle;

[0007] The elastic portion is used to limit the blocking rod to the first position when the pressing portion is not pressed, and when the pressing portion is pressed, the elastic portion elastically deforms and allows the blocking rod to move to the second position.

[0008] Furthermore, the stop device also includes a seat plate connected to the shaft seat, the seat plate is provided with a guide hole, the elastic part includes a push rod and a compression spring, the push rod has an upper part pivotally connected to the pressing part and a lower part adapted to the guide hole and extending in the up and down directions, the two ends of the compression spring are respectively abutted against the upper part and the seat plate, the pressing part or the rotating part is provided with a groove body, when the pressing part is pressed by the upper part, the groove body allows the lower part to move in the guide hole and the blocking rod to swing to the second position.

[0009] Furthermore, the shaft seat is located above the seat plate.

[0010] Furthermore, there are two blocking rods, which are symmetrically arranged on both sides of the axle seat.

[0011] Furthermore, a shaft sleeve is fixed on the shaft seat and is sleeved outside the first shaft;

[0012] The upper portion includes a seat body and a second shaft connected to the seat body and parallel to the first shaft. The second shaft passes through the two pressing parts and is respectively fixed with a first limiting member on one side of the two pressing parts away from the push rod.

[0013] Furthermore, a gap is allowed between the first limiting member and the pressing portion.

[0014] Furthermore, the second shaft is pivotally connected to the base body, and second limiting members located on both sides of the base body are fixed on the second shaft.

[0015] Furthermore, the first shaft is fixedly connected to the rotating part, the groove body is opened at one end of the pressing part away from the rotating part, and the second shaft passes through the groove body and can slide along the groove body.

[0016] Furthermore, the groove is provided in the rotating portion, and the first shaft passes through the groove and can slide along the groove.

[0017] Furthermore, the elastic portion is a torsion spring, both ends of which are connected to the shaft seat and the blocking rod respectively. When the pressing portion is pressed, the blocking rod overcomes the torsion force of the torsion spring and swings from the first position to the second position.

[0018] The present invention also discloses an elevator comprising the above-mentioned stopping device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 2. It is a schematic diagram of the three-dimensional structure of the stopping device when stopping the overhead travelling crane according to one embodiment of the present invention;

[0020] Figure 22. It is a schematic diagram of the three-dimensional structure of the stopping device when releasing the overhead travelling crane according to one embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the three-dimensional structure of a stopper device according to an embodiment of the present invention;

[0022] Figure 4 is a broken cross-sectional view of a stopper device according to an embodiment of the present invention;

[0023] Figure 5 is another broken cross-sectional view of a stop device according to an embodiment of the present invention;

[0024] Figure 6 is a structural schematic diagram of a stopper device according to another embodiment of the present invention when the stopper lever is located in the first position;

[0025] Figure 7 is a schematic structural diagram of a stopper device according to another embodiment of the present invention when the stopper lever is located at the second position;

[0026] Figure 8 is a structural schematic diagram of a stopper device according to yet another embodiment of the present invention when the stopper lever is located in the first position;

[0027] Figure 9 2 is a schematic structural diagram of a stopper device according to yet another embodiment of the present invention when the stopper lever is located at the second position. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0029] See attached Figure 1 As shown, a stopping device 100 of the present invention is located above the lifting track 200 and rises and falls synchronously with the lifting track 200 . The stopping device 100 is used to stop or release the overhead travelling vehicle 300 located on the lifting track 200 .

[0030] See attached Figure 2 As shown, the stopping device 100 includes a shaft seat 4 , a stopping rod 2 and an elastic portion 3 .

[0031] The shaft seats 4 are spaced apart above the lifting rails 200 .

[0032] See attached Figure 3As shown, the blocking lever 2 includes a pressing portion 21 and a stop portion 22 arranged vertically, and a rotating portion 23 connected therebetween. The pressing portion 21 and the stop portion 22 form an angle with their opening facing the inside of the lifting track 200. The lifting track 200 includes two track bodies spaced apart along the width direction. The inside of the lifting track 200 is the side where the two track bodies are closer to each other in the width direction. The rotating portion 23 is pivotally connected to the axle seat 4 via a first shaft 1, and the blocking lever 2 can swing about the axis of the first shaft 1 to switch between a first position and a second position. In the first position, the angle between the pressing portion 21 and the horizontal plane is acute, and the stop portion 22 tilts toward the inside of the lifting track 200 to stop the overhead crane 300, in which case the overhead crane 300 is locked. In the second position, the stop portion 22 swings outward from the lifting track 200 to release the overhead crane 300. In this unlocked position, the overhead crane 300 can travel along the length of the lifting track 200.

[0033] The elastic portion 3 is used to limit the blocking rod 2 to the first position when the pressing portion 21 is not pressed. When the pressing portion 21 is pressed, the elastic portion 3 elastically deforms and allows the blocking rod 2 to move to the second position.

[0034] See attached Figure 1 As shown, when the overhead crane 300 needs to be lifted, the pressing portion 21 is not pressed, and the elastic portion 3 restricts the blocking rod 2 to the first position. In the first position, the stopper 22 is tilted toward the inner side of the lifting track 200, and the stopper 22 can stop the overhead crane 300 in a direction in which the overhead crane 300 can slide. During the lifting process of the overhead crane 300, if the lifting track 200 tilts and causes the overhead crane 300 to slide, the stopper 22 of the blocking rod 2 stops the overhead crane 300, and the overhead crane 300 will not fall from the lifting track 200.

[0035] When the overhead crane 300 and the lifting track 200 are synchronously lifted to a preset height, and the lifting track 200 docks with the working track in the air, the pressing portion 21 of the barrier rod 2 first abuts against a fixing member (not shown) fixed in the air. The fixing member may be, for example, a ceiling of a roof or a keel mounted on the roof. This embodiment does not limit the type of fixing member. When the lifting track 200 continues to move upward, the pressing portion 21 is pressed downward, and the barrier rod 2 swings. During this swinging process, since the angle between the pressing portion 21 and the stopper 22 is formed with the opening facing the inside of the lifting track 200 and the angle between the pressing portion 21 and the horizontal plane is an acute angle, the stopper 22 can only swing toward the outside of the overhead crane 300 until the barrier rod 2 reaches the second position. At this time, the attachment Figure 2 As shown, the stopper 22 is already located outside the front and rear running wheels of the overhead travelling vehicle 300, the stopper device 100 releases the overhead travelling vehicle 300, the overhead travelling vehicle 300 is in an unlocked state, and the overhead travelling vehicle 300 can move from the lifting track 200 to the working track.

[0036] In the prior art, an additional power source (such as an electric push rod or a pneumatic push rod) is installed on the lifting track 200 to achieve the stopping and releasing of the overhead crane 300 on the lifting track 200. This requires the installation of air pipes or cables on the lifting track 200, which is complex. Furthermore, because the power source requires a controller, this software-controlled structure has low reliability. Software anomalies or abnormal power outages may cause the stopping of the overhead crane 300 on the lifting track 200 to fail, resulting in the overhead crane 300 falling.

[0037] The stopper device 100 in this embodiment does not require these power sources. It is a purely mechanical mechanism that rises and falls synchronously with the lifting track 200. As the lifting track 200 rises and falls, the stopper device 100 stops and releases the overhead crane 300 on the lifting track 200. Therefore, there is no need to route air pipes or cables on the lifting track 200, nor to consider retracting or extending these pipes during the lifting of the lifting track 200, simplifying the structure. This purely mechanical structure does not rely on a controller and is therefore highly reliable.

[0038] The stop device 100 and the lifting track 200 rise and fall synchronously, that is, the stop device 100 is connected to the lifting track 200. The stop device 100 can be installed on the ground and does not need to be operated in the air, which reduces the work intensity of personnel.

[0039] At the same time, the stop device 100 is located above the lifting track 200, and it is the pressing part 21 located above that is pressed, so the pressing distance required is shorter, and there is no need to set a retractable power source in the air to press the pressing part 21. During the lifting process, the stop device 100 can press the barrier rod through the fixing parts fixed in the air, thereby realizing the release of the overhead crane 300. There is no need to control the power source and wait for the power source to operate, which saves the release time of the overhead crane 300.

[0040] In one embodiment, see the attached Figure 3As shown, the stopper device 100 also includes a seat plate 5 fixedly connected to the axle seat 4. The seat plate 5 is connected to the lifting track 200 via a connecting frame 6. The connecting frame 6 has a vertical section extending up and down, the lower end of the vertical section is connected to the lifting track 200, and the upper end of the vertical section is connected to the seat plate 5. The connecting frame can be a hook with a gate-shaped structure that connects the two rail bodies of the lifting track 200, or it can be other mechanisms specifically designed to mount the stopper device 100. When the connecting frame 6 is a hook with a gate-shaped structure, it includes a vertical section connected to the two rail bodies and a horizontal section connected to the upper ends of the two vertical sections, and the seat plate 5 is fixed to the horizontal section. On the one hand, the connecting frame 6 connects the two rail bodies of the lifting track 200, achieving the connection between the stopper device 100 and the lifting track 200; on the other hand, the horizontal section of the connecting frame 6, which is spaced above the lifting track 200, raises the height of the seat plate 5, allowing the stopper device 100 to be spaced above the lifting track 200. In this case, the pressing distance of the stopper device 100 is shorter, and the time it takes to unlock the overhead crane 300 is shortened.

[0041] See attached Figure 5 As shown, the seat plate 5 is provided with a guide hole 51, and the elastic portion 3 includes a push rod 32 and a compression spring 31. The push rod 32 has an upper portion pivotally connected to the pressing portion 21 and a lower portion adapted to the guide hole 51 and extending in the vertical direction. The two ends of the compression spring 31 abut against the upper portion and the seat plate 5 respectively. The pressing portion 21 or the rotating portion 23 is provided with a groove 24, which extends along the length direction of the pressing portion 21. When the pressing portion 21 is pressed by the upper portion, the groove 24 allows the lower portion to move within the guide hole 51 and the blocking lever 2 to swing to the second position.

[0042] In this embodiment, guide hole 51 guides the lifting and lowering of push rod 32, allowing push rod 32 to move only up and down. The upper portion of push rod 32 is pivotally connected to pressing portion 21, and in conjunction with groove 24, allows push rod 32 to swing the blocking lever 2 as it moves up and down, converting the linear motion of push rod 32 into the swinging motion of blocking lever 2, thereby switching blocking lever 2 between the first and second positions.

[0043] See attached Figure 3 As shown, the push rod 32 includes a push rod body 323, a seat body 321 fixedly connected to the push rod body 323, and a second shaft 322 extending through the seat body 321. The second shaft 322 is parallel to the first shaft 1 and its end passes through the pressing portion 21. The portion below the seat body 321 is the lower portion, and the portion above the seat body 321 and the seat body 321 is the upper portion, which is always located above the seat plate 5.

[0044] In one embodiment, the upper end of the push rod body 323 extends upward from the base 321, thereby increasing the overall length of the push rod 32 and further reducing the distance that the push rod 32 needs to be pressed. To increase the contact area with the fixed fixture in the air and ensure a more uniform force applied to the push rod by the fixture, a top plate 324 is fixed to the top of the push rod body 323. The top plate 324 abuts the fixture when the lifting track 200 is raised to a predetermined height.

[0045] In one embodiment, two stoppers 2 are symmetrically arranged on either side of the axle seat 4. During use, the stopper device 100 is positioned between the front and rear running wheels of the overhead crane 300. When the overhead crane 300 slides forward or backward along the extension direction of the lifting rail 200, the overhead crane 300 moves from a position away from the axle seat 4 toward the axle seat 4. The overhead crane 300 transmits the slipping force to the axle seat 4 via the stoppers 2 and the first axle 1. The axle seat 4 provides a counterforce to the stoppers 2 and the first axle 1, preventing the overhead crane 300 from sliding further and thus falling. During this process, the force acting on the first axle 1 is always compressive, making it difficult for the first axle 1 to separate from the axle seat 4.

[0046] In one embodiment, see the attached Figure 4 As shown, a shaft sleeve 41 is fixed on the shaft seat 4 and is sleeved on the first shaft 1. The shaft sleeve 41 extends along the axial direction of the first shaft 1 and is closed for a circle. The upper part of the second shaft 322 passes through the top pressing parts 21 of the two symmetrically arranged baffle rods 2, and a first limiting member 3221 is fixed on the side of the two top pressing parts 21 away from the top rod 32. The first limiting member 3221 can be, for example, a nut threadedly connected to the second shaft 322, or a protrusion that is connected to the second shaft 322 by riveting or welding and protrudes from the cross section of the second shaft 322.

[0047] Since the stopper 22 that the overhead crane 300 collides with is not in the axial position of the first shaft 1, the first shaft 1 will be subjected to a bending moment perpendicular to the axial direction of the first shaft 1 and the pressing portion 21 of the blocking rod 2 will tend to move away from the shaft seat 4. The arrangement of the shaft sleeve 41 can provide effective support for the first shaft 1. The shaft sleeve 41 extends along the axial direction of the first shaft 1. The supporting position of the shaft sleeve 41 on the first shaft 1 is away from the shaft seat 4, which can provide a larger force arm for the first shaft 1 to resist the bending moment. The supporting force of the shaft sleeve 41 on the first shaft 1 is relatively small, and the first shaft 1 is not easily damaged.

[0048] The two first stoppers 3221 on the second shaft 322 are disposed on the side of the pressing portion 21 of the retaining rod 2 away from the shaft seat 4. The first stoppers 3221 can stop the pressing portion 21. When only the first shaft 1 is inserted into the shaft seat 4 and no stoppers are provided on the first shaft 1 to prevent it from escaping from the shaft seat 4, the two first stoppers 3221 on the second shaft 322 can prevent the two retaining rods 2 and the first shaft 1 from escaping from the shaft seat 4.

[0049] When there is a large gap between the inner wall of the sleeve 41 and the outer wall of the first shaft 1, or when the sleeve 41 is subjected to a large impact, the sleeve 41 cannot provide effective support for the first shaft 1. Since the blocking rods 2 are symmetrically arranged on both sides of the shaft seat 4, and the stop device 100 is set between the front and rear running wheels of the overhead crane 300, the overhead crane 300 will slip and collide with the stop portion 22, which will only cause the top pressure portion 21 of the blocking rod 2 to move away from the shaft seat 4. Therefore, during the process of the first limit member 3221 stopping the top pressure portion 21, the second shaft 322 is mainly subjected to the tensile force. This tensile force and the force arm formed by the first limit member 3221 and the first shaft 1 can prevent the blocking rod 2 from swinging in a direction perpendicular to the axis of the first shaft 1 and prevent the overhead crane 300 from slipping and falling. At this time, the second shaft 322 will not be easily bent and damaged due to the pressure.

[0050] The second shaft 322 is pivotally connected to the base 321. Second stoppers 3222 are fixed to the second shaft 322, located on either side of the base 321. The base 321 is confined between the two second stoppers 3222. Because the first stoppers 3221 prevent smooth rotation at the connection between the second shaft 322 and the blocking lever 2, the first shaft 1 and the base 321 are pivotally connected to achieve a pivotal connection between the second shaft 322 and the upper portion. The second stoppers 3222 prevent axial movement of the second shaft 322.

[0051] Exemplarily, the first limiting member 3221 and the second limiting member 3222 are both nuts, the second shaft 322 has a shaft segment and threaded segments located at both ends of the shaft segment, the shaft segment is rotatably connected to the seat body 321, and the threaded segment is threadedly connected to the nut.

[0052] In one embodiment, an anti-slip member can be provided on the first shaft 1 to prevent it from sliding out of the shaft seat 4. In this case, there is no need to fix the first limiter 3221 on the second shaft 322. Exemplarily, the first shaft 1 is a screw that passes through the shaft seat 4, the screw nut is located on one side of the shaft seat 4, and the screw rod passes through the shaft seat 4 and the stop rod 2 to connect with the nut. At this time, the stop rod 2 and the shaft seat 4 are confined between the nut and the nut, and the first shaft 1 will not disengage from the shaft seat 4. At this time, even without the first limiter 3221, the stop rod 2 can remain vertical to release and stop the overhead crane 300.

[0053] The height position of the shaft seat 4 on the seat plate 5 is adjustable. In one embodiment, see the attached Figure 2 As shown, the shaft seat 4 is located below the seat plate 5.

[0054] In one embodiment, see the attached Figure 8 and attached Figure 9As shown, the axle seat 4 is located above the seat plate 5, and at this time, the hinge between the blocking rod 2 and the axle seat 4 moves upward. Compared with the axle seat 4 being located below the seat plate 5, when the axle seat 4 is located above the seat plate 5, the angle between the pressing portion 21 of the blocking rod 2 and the horizontal plane is reduced, and the angle between the stop portion 22 of the blocking rod 2 and the plane perpendicular to the axis of the traveling wheel of the overhead crane 300 is reduced. At the same time, the stop portion 22 of the blocking rod 2 can be longer in length, and the shorter the distance that the top rod 32 is pressed, the more the stop portion 22 of the blocking rod 2 can be moved away from the adjacent Figure 8 The first position shown is moved to the adjacent Figure 9 In the second position shown, the pressing distance of the push rod 32 is reduced, effectively reducing the time the overhead crane 300 is locked and unlocked during the lifting process. This prevents the overhead crane 300 from slipping and falling due to tilting of the lifting rail 200 during the switching from locked to unlocked position. Furthermore, the axle seat 4 is positioned above the seat plate 5, allowing the seat body 321 to deflect inwardly of the overhead crane 300, preventing the axle seat 4 from protruding outside the connecting frame 6 and saving space across the width of the elevator.

[0055] In one embodiment, see the attached Figure 3 As shown, the groove 24 is formed at the end of the pressing portion 21 away from the rotating portion 23. The second shaft 322 passes through the groove 24 and can slide along the groove 24. The first shaft 1 is fixedly connected to the rotating portion 23. At this time, the blocking lever 2 swings with the first shaft 1 as the hinge axis. When the pressing portion 21 is pressed, the second shaft 322 moves downward and slides along the groove 24. Through the cooperation between the second shaft 322 and the groove 24, the vertical downward force is converted into a rotational force for the blocking lever 2, and the blocking lever 2 swings to the second position.

[0056] In one embodiment, see the attached Figure 6 and attached Figure 7 As shown, the groove 24 is formed in the rotating portion 23, and the first shaft 1 passes through the groove 24 and can slide along the groove 24. At this time, the blocking lever 2 swings with the second shaft 322 as the hinge axis. When the pressing portion 21 is pressed, the second shaft 322 moves downward, that is, the hinge point between the blocking lever 2 and the second shaft 322 moves downward, and the first shaft 1 slides along the groove 24. Through the cooperation between the first shaft 1 and the groove 24, the vertical downward force is converted into a force for the blocking lever 2 to rotate, and the blocking lever 2 swings to the second position.

[0057] At this time, one end of the first shaft 1 passes through the groove 24 and forms a stopper 11, which prevents the first shaft 1 from slipping out of the groove 24. Exemplarily, the stopper 11 is a nut threadedly connected to the first shaft 1, or the first shaft 1 is a screw and the stopper 11 is a nut of the screw.

[0058] In one embodiment, the elastic portion 3 is a torsion spring, the two ends of which are respectively connected to the shaft seat 4 and the blocking rod 2. When the pressing portion 21 is pressed, the blocking rod 2 overcomes the torsion force of the torsion spring and swings from the first position to the second position.

[0059] In one embodiment, a roller is installed at one end of the pressing portion 21 away from the rotating portion 23, and the roller is in rolling connection with the fixed member to reduce the friction when the pressing portion 21 slides along the fixed member. A torsion spring is sleeved on the first shaft 1, one end of the torsion spring is connected to the shaft seat 4, and the other end is connected to the rotating portion 23. The torsion spring provides torsion for the blocking rod 2 so that when the pressing portion 21 is not pressed, the stop portion 22 is in a locked position. When the lifting track 200 rises to a preset position, the roller is pressed by the fixed member, and the roller moves while rolling along the fixed member. The blocking rod 2 overcomes the torsion and rotates, and the stop portion 22 moves from the first position to the second position.

[0060] In one embodiment, the present invention further discloses an elevator, which includes a lifting track 200, an overhead travelling crane 300 that can slide along the lifting track 200, and the above-mentioned stopping device 100.

[0061] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention are covered by the scope of protection of the present invention.

Claims

1. A stopper device that rises and falls synchronously with a lifting track, characterized in that: The stopping device comprises: Axle seats, the axle seats are arranged above the lifting track at intervals; The blocking rod comprises a pressing portion and a stopping portion arranged in an upper and lower manner and a rotating portion connected therebetween, the pressing portion and the stopping portion forming an angle with an opening facing the inner side of the lifting track, the rotating portion being pivotally connected to the axle seat via a first shaft, and the blocking rod being able to swing around the axis of the first shaft to switch between a first position and a second position; in the first position, the angle between the pressing portion and the horizontal plane is an acute angle, and the stopping portion is inclined toward the inner side of the lifting track to stop the overhead crane; in the second position, the stopping portion swings toward the outer side of the lifting track to release the overhead crane; an elastic portion, the elastic portion being used to limit the blocking rod to the first position when the pressing portion is not pressed, and elastically deforming and allowing the blocking rod to move to the second position when the pressing portion is pressed; The stop device also includes a seat plate connected to the shaft seat, the seat plate is provided with a guide hole, the elastic part includes a push rod and a compression spring, the push rod has an upper part pivotally connected to the pressing part and a lower part adapted to the guide hole and extending in the up and down directions, the two ends of the compression spring are respectively abutted against the upper part and the seat plate, the pressing part or the rotating part is provided with a groove body, when the pressing part is pressed by the upper part, the groove body allows the lower part to move in the guide hole and the blocking rod to swing to the second position.

2. The stopper device according to claim 1, characterized in that: The shaft seat is located above the seat plate.

3. The stopper device according to claim 1, characterized in that: There are two blocking rods, which are symmetrically arranged on both sides of the shaft seat.

4. The stopper device according to claim 1, characterized in that: A shaft sleeve is fixed on the shaft seat and is sleeved on the first shaft; The upper portion includes a seat body and a second shaft connected to the seat body and parallel to the first shaft. The second shaft passes through the two pressing parts and is respectively fixed with a first limiting member on one side of the two pressing parts away from the push rod.

5. The stopper device according to claim 4, characterized in that: The second shaft is pivotally connected to the base body, and second limiting members located on both sides of the base body are fixed on the second shaft.

6. The stopping device according to claim 4, characterized in that: The first shaft is fixedly connected to the rotating part, the groove body is opened at one end of the pressing part away from the rotating part, and the second shaft passes through the groove body and can slide along the groove body.

7. The stopping device according to claim 1, characterized in that: The groove body is provided in the rotating portion, and the first shaft passes through the groove body and can slide along the groove body.

8. A lift, characterized in that: The invention comprises the stopping device according to any one of claims 1 to 7.

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