Lifting sliding type shock insulation groove cover plate structure and using method thereof

Abstract

The invention discloses a lifting sliding type shock insulation groove cover plate structure and a using method thereof.In an earthquake, a shock insulation device impacts the lower end of a first rod body and the front end of an optical axis, the lower end of the first rod body is pushed, and the first rod body and the optical axis synchronously move in the direction of a circular through hole of a fixed linear bearing and a circular through hole of a fixed frame; an X-shaped frame of the cross lifting mechanism is gradually changed into a small angle from a large angle, and drives an upper cover plate to be lifted upwards without being separated from an optical axis, so that the required displacement space of the seismic isolation device under the action of seismic force is realized; a displacement space is provided, and meanwhile, the cover plate is ensured not to fall into the shock isolation groove, so that the normal function of the shock isolation device is not influenced; according to the earthquake isolation groove, the use requirement of daily bearing can be met, the structure can be kept intact and not damaged after an earthquake occurs, repeated use is achieved after the earthquake isolation groove is reset manually, and the risk that the earthquake isolation groove falls into the earthquake isolation groove is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic isolation trench cover plates, and in particular to a lifting and sliding type seismic isolation trench cover plate structure and a use method thereof. Background Art

[0002] my country is located at the junction of two major geological tectonic plates, where earthquakes occur frequently, causing great harm and heavy losses. At present, my country's earthquake fortification design aims to minimize casualties caused by earthquakes, and pays little attention to the earthquake safety of important items in buildings and immovable cultural heritage. Cultural relics or precision instruments and equipment are severely damaged in earthquakes. The safety of high-value items such as cultural heritage, cultural relics collections, and precision instruments is of great significance. At present, mature and reliable seismic isolation devices have been developed for the earthquake / vibration protection of high-value items such as cultural heritage, cultural relics collections, and precision instruments. When designing the seismic isolation device, it is necessary to reserve sufficient movable gaps with the surrounding foundation ground to ensure that it can deform freely under the action of an earthquake. The currently commonly used construction method is to set up a seismic isolation trench.

[0003] A cover plate needs to be installed on the top of the seismic isolation trench to meet the bearing function of daily walking. In the prior art, a simple cover plate is generally used. Two situations may occur with such a cover plate during an earthquake: the first situation is that the cover plate cannot be removed due to the seismic force, resulting in the seismic isolation device having no displacement space and being unable to achieve the seismic isolation function; the second situation is that the cover plate falls into the seismic isolation trench after being subjected to the seismic force, which will also affect the normal operation of the seismic isolation device.

[0004] Therefore, the top cover of the seismic isolation trench needs to meet the bearing function of daily walking, and needs to have a certain horizontal and vertical displacement activity to ensure the three-way free deformation of the seismic isolation device, and it needs to be prevented from falling into the seismic isolation trench and affecting the function of the seismic isolation device. Summary of the invention

[0005] The present invention provides a lifting and sliding type seismic isolation trench cover structure and a method of using the same, so as to solve the technical problems that the seismic isolation trench cover lacks a reliable mechanism to ensure the horizontal and vertical deformation of the seismic isolation device under the action of an earthquake, and the required active displacement affects the seismic isolation performance.

[0006] To achieve the above object, the present invention adopts the following technical solution: The present invention provides a lifting and sliding type seismic isolation trench cover plate structure, comprising a seismic isolation device, a wall, a seismic isolation trench structural steel beam, a fixed linear bearing, an optical axis, a bracket buckle, a cross lifting mechanism and an upper cover plate; The seismic isolation device is set on the ground, the wall is set on the right side of the ground, the seismic isolation trench structural steel beam is cantilevered and set on the inner side of the wall and is perpendicular to the wall; the fixed linear bearing is fixedly set on the upper end surface of the cantilevered end of the seismic isolation trench structural steel beam, and there are two fixed linear bearings, which are symmetrically distributed on the upper end surface of the seismic isolation trench structural steel beam; The bracket fastener comprises a fixed frame, a support plate and a connecting block; one end of the connecting block is arranged on the top surface of the fixed linear bearing, the other end is arranged on the fixed frame, and the support plate is arranged on the upper end surface of the fixed frame; A circular through hole for the optical axis to pass through is provided in the middle of the fixed linear bearing and the fixed frame. The optical axis passes through the fixed linear bearing and the bracket buckle and extends to one side of the seismic isolation device, spanning the seismic isolation groove provided between the seismic isolation groove structural beam and the seismic isolation device. The cross lifting mechanism is two X-shaped frames, and the two X-shaped frames are arranged on the lower end surface of the upper cover plate; the X-shaped frame is composed of a first rod body and a second rod body crossed, and a pin is arranged at the intersection of the first rod body and the second rod body, so that the first rod body and the second rod body can rotate around the intersection point as the axis; the lower end of the first rod body is hinged and fixed to the front end of the optical axis through a pin and overlapped with the seismic isolation device, and the upper end is slidably connected to the upper cover plate; the lower end of the second rod body is hinged and fixed to the fixed frame through a pin, and the upper end is hinged and fixed to the front end of the lower end surface of the upper cover plate through a pin.

[0007] Preferably, a pin is provided at the upper end of the first rod body, the pin is perpendicular to the side of the first rod body, two guide rails for the pin to slide are correspondingly provided on both sides of the lower end surface of the upper cover plate, and the pin is clamped in the guide rail and can slide along the guide rail.

[0008] Preferably, the upper cover plate is a U-shaped plate, the front side plate of the upper cover plate is vertically arranged, and the rear side plate is inclined outwardly arranged.

[0009] Preferably, the support plate is a J-shaped plate, the upper part of the vertical long plate of the support plate is inclined outward to match the inclination angle of the rear side plate of the upper cover plate; the middle part of the vertical short plate of the support plate is grooved to support the first rod body.

[0010] Preferably, a limit stopper is provided on the upper outer side surface of the second rod body, which is used to clamp the first rod body and limit the rotation angle of the first rod body.

[0011] Preferably, the seismic isolation trench structural steel beam is an H-shaped steel beam, and the fixed linear bearings are distributed on the edge of the cantilevered end of the flange plate on the seismic isolation trench structural steel beam and fixed by bolts.

[0012] Preferably, the lower end surface of the upper cover plate is provided with reinforcing ribs distributed at intervals.

[0013] Preferably, a first connecting rod is provided between the two fixed linear bearings to connect the two fixed linear bearings into a whole.

[0014] Preferably, a second connecting rod is provided between the two first rod bodies to connect the two sets of X-shaped frames into a whole.

[0015] The present invention also provides a method for using the above-mentioned lifting and sliding type seismic isolation trench cover structure, comprising the following steps: Step 1, assembly: cross and fix the first rod and the second rod to form a cross-lifting mechanism, install the cross-lifting mechanism to the upper cover, install the optical axis at the lower end of the first rod, and install the lower end of the second rod on the bracket buckle; Step 2, fixation: install the fixed linear bearing on the steel beam of the seismic isolation groove as the force support structure of the upper cover plate, and then connect the bracket buckle with the fixed linear bearing; Step 3: Positioning: Press the upper cover plate to increase the intersection angle between the first rod and the second rod, reduce the height of the cross-lifting mechanism, and slide the optical axis forward, driving the front side plate of the upper cover plate close to the seismic isolation device, until the limit stopper abuts against the second rod, and the second rod overlaps the groove of the bracket buckle, thus completing the determination of the initial position; Step 4, taking effect: the earthquake force triggers the seismic isolation device to move, and by contacting the lower end of the first rod body and the front end of the optical axis, the lower end of the first rod body is pushed and moves synchronously with the optical axis along the circular through hole of the fixed linear bearing and the circular through hole of the fixed frame, and the X-shaped frame of the cross-lifting mechanism gradually changes from a large angle to a small angle, and the relative displacement between the lower end of the first rod body and the lower end of the second rod body along the optical axis gradually decreases, and the relative displacement between the upper end of the second rod body and the upper end of the first rod body along the upper cover plate guide rail gradually decreases, and drives the upper cover plate to lift upward without leaving the optical axis, thereby realizing the displacement space required by the seismic isolation device under the action of earthquake force; Step 5, reset: after the upper cover is pushed open by an earthquake or other external force, the upper cover is manually pushed down obliquely, and the operation of step 3 is repeated to make the X-shaped frame of the cross-lifting mechanism present a large angle state, and the upper cover is restored to a horizontal state, thus achieving the initial setting state of the upper cover.

[0016] The beneficial effects of the present invention are embodied in: 1) The present invention provides a lifting and sliding type seismic isolation trench cover plate structure and a method for using the same. When an earthquake occurs, the seismic isolation device hits the lower end of the first rod body and the front end of the optical axis, pushing the lower end of the first rod body and moving synchronously with the optical axis along the circular through hole of the fixed linear bearing and the circular through hole of the fixed frame. The X-shaped frame of the cross-lifting mechanism gradually changes from a large angle to a small angle, and drives the upper cover plate to lift upward without leaving the optical axis, thereby realizing the displacement space required by the seismic isolation device under the action of seismic force. While providing the displacement space, it ensures that the cover plate will not fall into the seismic isolation trench, and will not affect the normal function of the seismic isolation device. 2) The present invention provides a lifting and sliding type seismic isolation trench cover structure and a method of using the same, which can meet the daily load-bearing requirements and can also keep the structure intact after an earthquake. It can be reset by manpower and reused multiple times without the risk of falling into the seismic isolation trench; 3) The present invention provides a lifting and sliding type seismic isolation trench cover plate structure and a method of using the same. The cover plate structure is scientifically designed, and a cross-lifting mechanism is arranged on the upper cover plate. An optical axis is arranged at the lower end of the cross-lifting mechanism. The optical axis passes through the bracket clip and the fixed linear bearing. The fixed linear bearing is fixed on the structural steel beam of the seismic isolation trench; a first connecting rod is arranged between a group of fixed linear bearings to enhance the structural stability; a second connecting rod is arranged between a group of first rod bodies to enable the two first rod bodies to operate in coordination and enhance the integrity.

[0017] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention; the main purpose and other advantages of the present invention may be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram of the initial state of the seismic isolation trench cover structure of the present invention.

[0019] Figure 2 It is a partial structural front view of the present invention.

[0020] Figure 3 yes Figure 2 Top view of the local structure.

[0021] Figure 4 It is a diagram of the effective state of the seismic isolation trench cover structure of the present invention.

[0022] Figure markings: 1-seismic isolation device, 2-wall, 3-seismic isolation groove structural steel beam, 4-fixed linear bearing, 5-optical axis, 6-bracket clip, 61-fixed frame, 62-support plate, 63-connecting block, 7-cross lifting mechanism, 71-first rod body, 72-second rod body, 73-pin, 74-limit baffle, 8-upper cover plate, 9-guide rail. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be interpreted as limiting the technical solution of the present invention.

[0024] The present invention takes a certain collection seismic isolation project as an example. In view of the lack of reliable mechanism to ensure the horizontal and vertical deformation of the seismic isolation device 1 under the action of earthquake, the required movable displacement affects the seismic isolation performance. A lifting and sliding cover is proposed, which can realize the rapid start of the lifting and pushing function of the cover triggered by the earthquake force, and the cover is only lifted freely within the range of the optical axis 5 connecting rod, and will not fall into the seismic isolation trench to affect the normal operation of the seismic isolation device 1. The device structure is simple and effective, which is convenient for the installation and implementation of the seismic isolation trench cover, can ensure the realization of the key seismic isolation technology, and can be quickly restored, with a large application space and market promotion value.

[0025] Reference Figure 1-3 The present invention provides a lifting and sliding type seismic isolation trench cover structure, including a seismic isolation device 1, a wall 2, a seismic isolation trench structural steel beam 3, a fixed linear bearing 4, an optical axis 5, a bracket buckle 6, a cross lifting mechanism 7 and an upper cover 8; The seismic isolation device 1 is set on the ground, the wall 2 is set on the right side of the ground, the seismic isolation groove structural steel beam 3 is cantilevered and set on the inner side of the wall 2 and is perpendicular to the wall 2; the seismic isolation groove structural steel beam 3 is an H-shaped steel beam, and the fixed linear bearing 4 is distributed on the edge of the cantilevered end of the upper flange plate of the seismic isolation groove structural steel beam 3 and is fixed by bolts. There are two fixed linear bearings 4, which are symmetrically distributed on the upper end surface of the seismic isolation groove structural steel beam 3; The bracket fastener 6 includes a fixing frame 61, a support plate 62 and a connecting block 63; one end of the connecting block 63 is arranged on the top surface of the fixed linear bearing 4, and the other end is provided with the fixing frame 61, and the support plate 62 is arranged on the upper end surface of the fixing frame 61; The fixed linear bearing 4 and the fixed frame 61 are both provided with circular through holes in the middle thereof for the optical axis 5 to pass through. The optical axis 5 passes through the fixed linear bearing 4 and the bracket buckle 6 and extends to one side of the seismic isolation device 1, spanning the seismic isolation groove provided between the seismic isolation groove structural beam and the seismic isolation device 1; The cross lifting mechanism 7 is composed of two X-shaped frames, which are arranged on the lower end surface of the upper cover plate 8; the X-shaped frame is composed of a first rod body 71 and a second rod body 72, and a pin is arranged at the intersection of the first rod body 71 and the second rod body 72, so that the first rod body 71 and the second rod body 72 can rotate around the intersection; the lower end of the first rod body 71 is hinged and fixed to the front end of the optical axis 5 through a pin and overlapped with the seismic isolation device 1, and the upper end of the first rod body 71 is provided with a pin 73, and the pin 7 3 is perpendicular to the side surface of the first rod body 71, and two guide rails 9 for the pin 73 to slide are correspondingly arranged on both sides of the lower end surface of the upper cover plate 8. The pin 73 is clamped in the guide rails 9 and can slide along the guide rails 9; the lower end of the second rod body 72 is hinged and fixed to the fixing frame 61 through a pin shaft, and the upper end is hinged and fixed to the front end of the lower end surface of the upper cover plate 8 through a pin shaft; a limit stopper 74 is arranged on the upper outer side surface of the second rod body 72, which is used to clamp the first rod body 71 and limit the rotation angle of the first rod body 71; Furthermore, the upper cover plate 8 is a U-shaped plate, and the lower end surface of the upper cover plate 8 is provided with reinforcing ribs distributed at intervals; the front side plate of the upper cover plate 8 is vertically arranged, and the rear side plate is inclined outward; the support plate 62 is a J-shaped plate, and the upper part of the vertical long plate of the support plate 62 is inclined outward to match the inclination angle of the rear side plate of the upper cover plate 8; the middle part of the vertical short plate of the support plate 62 is grooved to support the first rod body 71.

[0026] Furthermore, a first connecting rod is provided between the two fixed linear bearings 4 to connect the two fixed linear bearings 4 into a whole and enhance the stability of the whole; a second connecting rod is provided between the two first rod bodies 71 to connect the two groups of X-shaped frames into a whole and ensure that the two groups of X-shaped frames can move synchronously.

[0027] The present invention also provides a method for using the above-mentioned lifting and sliding type seismic isolation trench cover structure, comprising the following steps: Step 1, assembly: cross and fix the first rod 71 and the second rod 72 to form a cross lifting mechanism 7, install the cross lifting mechanism 7 to the upper cover 8, install the optical axis 5 at the lower end of the first rod 71, and install the lower end of the second rod 72 on the bracket buckle 6; Step 2, fixing: install the fixed linear bearing 4 on the seismic isolation groove structural steel beam 3 as a force-bearing support structure of the upper cover plate 8, and then connect the bracket buckle 6 to the fixed linear bearing 4; Step 3: Positioning: Press the upper cover plate 8 to increase the intersection angle between the first rod body 71 and the second rod body 72, reduce the height of the cross-lifting mechanism 7, and at the same time, slide the optical axis 5 forward, driving the front side plate of the upper cover plate 8 to approach the seismic isolation device 1, until the limit stopper 74 abuts against the second rod body 72, and the second rod body 72 overlaps the groove of the bracket buckle 6, and the initial position is determined; Step 4, taking effect: the earthquake force triggers the seismic isolation device 1 to move, and by contacting the lower end of the first rod 71 and the front end of the optical axis 5, the lower end of the first rod 71 is pushed and moves synchronously with the optical axis 5 along the circular through hole of the fixed linear bearing 4 and the circular through hole of the fixed frame 61, and the X-shaped frame of the cross-lifting mechanism 7 gradually changes from a large angle to a small angle, and the relative displacement between the lower end of the first rod 71 and the lower end of the second rod 72 along the optical axis 5 gradually decreases, and the relative displacement between the upper end of the second rod 72 and the upper end of the first rod 71 along the guide rail 9 of the upper cover plate 8 gradually decreases, and drives the upper cover plate 8 to lift upward without leaving the optical axis 5, thereby realizing the displacement space required by the seismic isolation device 1 under the action of the earthquake force. The specific state can be referred to Figure 4 ; Step 5, reset: after the upper cover plate 8 is pushed open by an earthquake or other external force, the upper cover plate 8 is manually pushed down obliquely, and the operation of step 3 is repeated to make the cross-lifting mechanism 7X frame present a large angle state, and the upper cover plate 8 is restored to a horizontal state, thereby realizing the initial setting state of the upper cover plate 8.

[0028] Furthermore, fixed connection holes for the fixed linear bearing 4 and the steel beam 3 of the seismic isolation trench structure are reserved in advance, and the hole tolerance is less than 1mm, ensuring the stable connection of the lifting and sliding seismic isolation trench cover plate; the length of the optical axis 5 is adjusted and determined according to the required width of the upper cover plate 8, and stainless steel should be preferably selected and meet a certain diameter size to ensure the vertical bearing capacity and smooth sliding of the lifting and sliding seismic isolation trench cover plate; the cross-lifting mechanism 7 uses steel of sufficient thickness, and the X-shaped frame of the cross-lifting component is in a large-angle shape in the normal flat state, and in a small-angle shape in the seismically lifted state, and the steel cross-lifting component has good bearing and supporting performance; the upper cover plate 8 should be made of steel, and steel ribs should be added to the lower part of the upper cover plate 8 to ensure that the bearing deformation of the upper folding cover plate is less than 2mm.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field can think of within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A lifting and sliding type seismic isolation trench cover structure, characterized in that: It comprises a seismic isolation device (1), a wall (2), a seismic isolation groove structural steel beam (3), a fixed linear bearing (4), an optical axis (5), a bracket buckle (6), a cross lifting mechanism (7) and an upper cover plate (8); The seismic isolation device (1) is arranged on the ground, the wall (2) is arranged on the right side of the ground, the seismic isolation groove structural steel beam (3) is cantilevered and arranged on the inner side surface of the wall (2) and is perpendicular to the wall (2); the fixed linear bearing (4) is fixedly arranged on the upper end surface of the cantilevered end of the seismic isolation groove structural steel beam (3), and there are two fixed linear bearings (4) which are symmetrically distributed on the upper end surface of the seismic isolation groove structural steel beam (3); The bracket fastener (6) comprises a fixing frame (61), a support plate (62) and a connecting block (63); one end of the connecting block (63) is arranged on the top surface of the fixed linear bearing (4), and the other end is provided with the fixing frame (61); the support plate (62) is arranged on the upper end surface of the fixing frame (61); A circular through hole for the optical axis (5) to pass through is provided in the middle of the fixed linear bearing (4) and the fixed frame (61); the optical axis (5) passes through the fixed linear bearing (4) and the bracket buckle (6) and extends toward one side of the seismic isolation device (1), spanning the seismic isolation groove provided between the seismic isolation groove structural beam and the seismic isolation device (1); The cross-lifting mechanism (7) is composed of two X-shaped frames, which are arranged on the lower end surface of the upper cover plate (8); the X-shaped frame is composed of a first rod body (71) and a second rod body (72) that cross each other, and a pin is arranged at the intersection of the first rod body (71) and the second rod body (72) so that the first rod body (71) and the second rod body (72) can rotate around the intersection point; the lower end of the first rod body (71) is hingedly fixed to the front end of the optical axis (5) through a pin and overlapped with the seismic isolation device (1), and the upper end is slidably connected to the upper cover plate (8); the lower end of the second rod body (72) is hingedly fixed to the fixing frame (61) through a pin, and the upper end is hingedly fixed to the front end of the lower end surface of the upper cover plate (8) through a pin.

2. The lifting and sliding type seismic isolation trench cover structure according to claim 1, characterized in that: A pin (73) is provided at the upper end of the first rod body (71), and the pin (73) is perpendicular to the side surface of the first rod body (71). Two guide rails (9) for sliding of the pin (73) are correspondingly provided on both sides of the lower end surface of the upper cover plate (8), and the pin (73) is clamped in the guide rail (9) and can slide along the guide rail (9).

3. The lifting and sliding type seismic isolation trench cover structure according to claim 2, characterized in that: The upper cover plate (8) is a U-shaped plate, the front side plate of the upper cover plate (8) is arranged vertically, and the rear side plate is arranged outwardly inclined.

4. The lifting and sliding type seismic isolation trench cover structure according to claim 3, characterized in that: The support plate (62) is a J-shaped plate. The upper portion of the vertical long plate of the support plate (62) is inclined outwards to match the inclination angle of the rear side plate of the upper cover plate (8). The middle portion of the vertical short plate of the support plate (62) is grooved to support the first rod body (71).

5. The lifting and sliding type seismic isolation trench cover structure according to claim 2, characterized in that: A limit stopper (74) is provided on the upper outer side surface of the second rod body (72) for clamping the first rod body (71) and limiting the rotation angle of the first rod body (71).

6. The lifting and sliding type seismic isolation trench cover structure according to claim 1, characterized in that: The seismic isolation groove structural steel beam (3) is an H-shaped steel beam, and the fixed linear bearing (4) is distributed on the edge of the cantilevered end of the upper flange plate of the seismic isolation groove structural steel beam (3) and is fixed by bolts.

7. The lifting and sliding seismic isolation trench cover structure according to claim 1, characterized in that: The lower end surface of the upper cover plate (8) is provided with reinforcing ribs distributed at intervals.

8. The lifting and sliding type seismic isolation trench cover structure according to claim 1, characterized in that: A first connecting rod is provided between the two fixed linear bearings (4) to connect the two fixed linear bearings (4) into a whole.

9. The lifting and sliding type seismic isolation trench cover structure according to claim 1, characterized in that: A second connecting rod is provided between the two first rod bodies (71) to connect the two sets of X-shaped frames into a whole.

10. The method for using the lifting and sliding seismic isolation trench cover structure according to any one of claims 1 to 9, characterized in that: The steps include: Step 1, assembly: cross and fix the first rod (71) and the second rod (72) to form a cross-lifting mechanism (7), install the cross-lifting mechanism (7) on the upper cover (8), install the optical axis (5) on the lower end of the first rod (71), and install the lower end of the second rod (72) on the bracket buckle (6); Step 2, fixing: installing the fixed linear bearing (4) on the seismic isolation groove structural steel beam (3) as a force-bearing support structure of the upper cover plate (8), and then connecting the bracket buckle (6) to the fixed linear bearing (4); Step 3, positioning: pressing the upper cover plate (8) to increase the intersection angle between the first rod body (71) and the second rod body (72), thereby reducing the height of the cross-lifting mechanism (7), and at the same time, the optical axis (5) slides forward, driving the front side plate of the upper cover plate (8) to approach the seismic isolation device (1), until the limit stopper (74) abuts against the second rod body (72), and the second rod body (72) overlaps the groove of the bracket buckle (6), thereby completing the determination of the initial position; Step 4, taking effect: the earthquake force triggers the seismic isolation device (1) to move, and by contacting the lower end of the first rod body (71) and the front end of the optical axis (5), the lower end of the first rod body (71) is pushed and moves synchronously with the optical axis (5) along the circular through hole of the fixed linear bearing (4) and the circular through hole of the fixed frame (61), the X-shaped frame of the cross-lifting mechanism (7) gradually changes from a large angle to a small angle, the relative displacement between the lower end of the first rod body (71) and the lower end of the second rod body (72) along the optical axis (5) gradually decreases, the relative displacement between the upper end of the second rod body (72) and the upper end of the first rod body (71) along the guide rail (9) of the upper cover plate (8) gradually decreases, and drives the upper cover plate (8) to be lifted upward without leaving the optical axis (5), thereby realizing the displacement space required by the seismic isolation device (1) under the action of the earthquake force; Step 5, resetting: after the upper cover plate (8) is pushed open by an earthquake or other external force, the upper cover plate (8) is manually pushed down obliquely, and the operation of step 3 is repeated, so that the X-shaped frame of the cross-lifting mechanism (7) is in a large-angle state, and the upper cover plate (8) is restored to a horizontal state, thereby achieving the initial setting state of the upper cover plate (8).

Images