Guardrail with adjustable post spacing

Abstract

The present application relates to the technical field of safety protection, in particular to a protective fence with adjustable distance between upright columns, which comprises a vertical plate and a telescopic sleeve, the vertical plate has a rocker and a driving gear inside, the telescopic sleeve has a double-threaded screw inside, the double-threaded screw has a driven gear, the two ends of the double-threaded screw have an internally-threaded arc-shaped handrail, the lower part of the double-threaded screw has an upright column, the bottom end of the vertical plate has a horizontal groove, the bottom end of the vertical plate has a jacking mechanism and a double-groove sliding block, and one side of the telescopic sleeve has a buffer mechanism.The present application rotates the driving gear by rotating the rocker manually, rotates the double-threaded screw through a chain transmission, and makes the internally-threaded arc-shaped handrail slide on both sides of the telescopic sleeve through the double-threaded screw transmission, so as to conveniently adjust the distance between the upright columns and further adapt to various floor windows for protection.The telescopic sleeve cooperates with the buffer mechanism to buffer the impact force generated by the contact between external objects and the protective fence, and does not need to be spliced, thus reducing the risk of bending the protective fence.

Description

Technical Field

[0001] This invention relates to a guardrail, and more particularly to a guardrail with adjustable post spacing, belonging to the field of safety guardrail technology. Background Technology

[0002] A guardrail is a structure used to enclose, isolate, or protect an area. It is typically used for safety and protection purposes. Guardrails can be used in factories, stations, bridges, elevated roads, and other places to ensure the safety of people and property. Guardrails can also be used to isolate buildings from the outside world during construction, protect the safety of surrounding people, and protect the safety of materials and equipment at the construction site, preventing them from being stolen.

[0003] In existing technology, after the building frame is poured, the interior walls need to be constructed. Windows or floor-to-ceiling windows are usually reserved on the exterior walls. Due to differences in building layouts, the shape and size of the reserved windows or floor-to-ceiling windows vary. During construction, the size of the floor-to-ceiling windows needs to be measured on-site to install guardrails. Existing guardrails are generally welded and the spacing of the posts cannot be adjusted. When the length is insufficient, splicing is usually used to protect the floor-to-ceiling window area. When workers are moving building materials, they can easily touch the guardrails. The splicing of guardrails usually uses snap-fit ​​connections, which may lead to insufficient stress at the splice, causing the guardrail to bend and fail to achieve the protective effect.

[0004] Therefore, it is urgent to improve the guardrails to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a guardrail with easily adjustable post spacing. A hand-cranked rocker arm rotates, driving a drive gear. The drive gear, via a chain, drives a double-threaded screw. The double-threaded screw drives an internally threaded arc-shaped handrail to slide on both sides of a telescopic sleeve, facilitating post spacing adjustment. This allows for protection against various floor-to-ceiling windows. The telescopic sleeve, in conjunction with a buffer mechanism, can cushion the impact of external objects contacting the guardrail. Furthermore, it eliminates the need for splicing, thus reducing the risk of guardrail bending.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include: A guardrail with adjustable post spacing includes a vertical plate and a telescopic sleeve fixedly installed on the vertical plate. A rocker arm is rotatably installed inside the vertical plate, and a drive gear is fixedly installed at both ends of the rocker arm. A double-threaded screw is rotatably installed inside the telescopic sleeve through a bearing. A driven gear is fixedly installed on the double-threaded screw, and the driven gear is rotatably connected to the drive gear through a chain. The two ends of the double-threaded screw are connected to internally threaded arc-shaped handrails through threaded engagement. The internally threaded arc-shaped handrails are slidably disposed inside the telescopic sleeve through the double-threaded screw. A column is fixedly connected to the bottom side of the double-threaded screw. A horizontal groove is fixedly installed at the bottom end of the upright plate. The lower end of the column is slidably disposed inside the horizontal groove through a slider. The bottom end of the upright plate is rotatably equipped with a lifting mechanism, and the upright plate is slidably equipped with double-groove sliders on both sides of the lifting mechanism. A buffer mechanism is provided on one side of the telescopic sleeve, and the two ends of the buffer mechanism are rotatably connected to the internally threaded arc-shaped handrail.

[0007] Preferably, the lower end of the column passes through the horizontal groove and extends below the horizontal groove. A mounting block is fixedly installed at the bottom end of the column, and the bottom end of the mounting block is on the same horizontal line as the bottom end of the upright plate. Several evenly distributed railings are slidably installed on the horizontal groove, and two railings are connected by a chain rod. A railing sliding guide rail is fixedly installed at the upper end of the column, and the railing sliding guide rail extends into the interior of the telescopic sleeve. The upper end of the railing is slidably installed inside the railing sliding guide rail.

[0008] Preferably, U-shaped connecting plates are fixedly installed at both ends of the transverse groove by bolts, and the transverse groove extension plate is fixedly connected to the U-shaped connecting plates by bolts. The column and the railing are slidably disposed inside the transverse groove and the transverse groove extension plate, and both ends of the transverse groove extension plate are fixed by pins.

[0009] Preferably, a push rod is rotatably mounted on the column, and a side push post is fixedly mounted on the push rod. Side push grooves are opened on both sides of the railing, and the side push post is slidably mounted inside the side push groove. A support rod rotation guide groove is opened on the upright plate, and the end of the push rod away from the column is slidably mounted inside the support rod rotation guide groove. A limit block is rotatably mounted on the column, and the bottom end of the limit block abuts against the upper side of the horizontal groove extension plate.

[0010] Preferably, a pull rod sliding guide rail is fixedly provided at the position of the telescopic sleeve corresponding to the buffer mechanism, a fixed plate is fixedly installed in the middle of the pull rod sliding guide rail, a buffer spring is fixedly connected to the fixed plate, and the end of the buffer spring away from the telescopic sleeve is connected to the buffer mechanism.

[0011] Preferably, the buffer mechanism includes two pull rods and a hinge rod. One end of the pull rod is rotatably mounted on the internally threaded arc-shaped handrail, and the other end of the pull rod is slidably mounted on the pull rod sliding guide rail. One end of the two hinge rods is rotatably connected to the middle of the pull rod, and the other ends of the two pull rods are hinged together by a hinge rod. The upper and lower ends of the hinge rod are connected to the lugs of the buffer spring.

[0012] Preferably, the rocker arm passes through the upright plate at both ends and extends to both sides of the upright plate. A rotating sleeve is rotatably provided in the middle of the rocker arm. The threads at both ends of the double-threaded screw are in opposite directions. The two internally threaded arc-shaped handrails are slidably disposed inside the telescopic sleeve through the rotation of the double-threaded screw.

[0013] Preferably, the lifting mechanism includes a shaft and a pedal fixedly connected to one side of the shaft. The shaft passes through the upright plate and extends to both sides of the upright plate. Shaped wheels are fixedly connected to both ends of the shaft.

[0014] Preferably, the upper end of the double-groove slider abuts against the upper end of the irregular wheel via an arc surface, and a return spring is fixedly installed on the bottom side of the double-groove slider, the return spring being fixedly installed inside the upright plate.

[0015] The present invention has at least the following beneficial effects: This invention uses a hand-cranked rocker arm to rotate a drive gear, which in turn drives a double-threaded screw via a chain. The double-threaded screw then drives an internally threaded arc-shaped handrail to slide on both sides of a telescopic sleeve, facilitating adjustment of the column spacing. This allows for compatibility with various floor-to-ceiling windows for protection. The telescopic sleeve works in conjunction with a buffer mechanism to cushion the impact force generated when external objects come into contact with the guardrail. Furthermore, it eliminates the need for splicing, thus reducing the risk of the guardrail bending.

[0016] During the sliding process of the column in this invention, one end of the support rod slides inside the rotation guide groove of the support rod. The length of the support rod remains unchanged and it rotates on the column. The side push column cooperates with the side push groove on the railing to push the railing to slide in the railing sliding guide rail and the horizontal groove. The side push columns are evenly arranged, which can increase the spacing between the columns while pushing the railings to be evenly arranged. The spacing between the railings is equal, which can improve the safety of the guardrail.

[0017] When the telescopic sleeve is slightly deformed by an impact from an external object, the pull rod slides to both sides through the pull rod sliding guide rail. The hinge rod will bear the tension of the pull rod, and the angle between the two hinge rods will increase. Under the action of the elastic force, the buffer spring tightens the hinge rod at the connection of the hinge rod, thereby buffering the impact force of the telescopic sleeve and effectively extending the service life of the guardrail.

[0018] The worker steps on a pedal to rotate the irregularly shaped wheel via a shaft. As the wheel rotates, its wider side contacts the upper arc surface of the double-groove slider, causing the double-groove slider to slide downwards. As the slider slides downwards, its bottom side contacts the ground, thus separating the bottom of the upright plate from the ground. At the same time, the worker cranks a rocker arm to adjust the spacing between the uprights. The operation can be done by one person, is simple and quick, and effectively reduces labor costs. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic elevation view provided for the present invention; Figure 2 Exploded structural diagram provided for this invention; Figure 3 This is a cross-sectional schematic diagram of the telescopic sleeve provided by the present invention; Figure 4 This is a schematic diagram of the railing structure provided by the present invention; Figure 5 A schematic diagram of the buffer mechanism provided by the present invention; Figure 6 A diagram of the lifting structure provided by this invention; Figure 7 This is a schematic diagram illustrating the operation of the present invention.

[0020] In the diagram, 1. Upright plate; 101. Support rod rotation guide groove; 2. Telescopic sleeve; 201. Pull rod sliding guide rail; 202. Fixing plate; 203. Buffer spring; 3. Rocker arm; 301. Rotating sleeve; 4. Driving gear; 5. Double threaded screw; 6. Driven gear; 7. Chain; 8. Internal threaded arc-shaped handrail; 9. Upright column; 901. Mounting block; 902. Railing sliding guide rail; 903. Support rod; 904. Side push column; 905. Limiting block; 10. Horizontal groove; 11. Lifting mechanism; 1101. Shaft; 1102. Pedal; 1103. Irregular wheel; 12. Double groove slider; 1201. Return spring; 13. Buffer mechanism; 1301. Pull rod; 1302. Hinge rod; 14. Railing; 1401. Side push groove; 15. U-shaped connecting plate; 16. Horizontal groove extension plate. Detailed Implementation

[0021] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] like Figures 1-7As shown, the guardrail provided in this embodiment, which facilitates the adjustment of the column spacing, has a rocker arm 3 rotatably mounted inside the upright plate 1. A drive gear 4 is fixedly installed at both ends of the rocker arm 3. The rocker arm 3 is used to drive the drive gear 4 to rotate. A double-threaded screw 5 is rotatably mounted inside the telescopic sleeve 2 via a bearing. A driven gear 6 is fixedly mounted on the double-threaded screw 5. The driven gear 6 and the drive gear 4 are rotatably connected via a chain 7. The drive gear 4 is used to drive the driven gear 6 to rotate via the chain 7. The double-threaded screw 5 then rotates within the telescopic sleeve 2 via the bearing. The drive gear 4 is then driven to rotate by manually cranking the rocker arm 3, and the drive gear 4 drives the double-threaded screw 5 to rotate via the chain 7. The two ends of the double-threaded screw 5 are connected to the internal threaded arc-shaped handrail 8 through threaded engagement. The internal threaded arc-shaped handrail 8 is slidably set inside the telescopic sleeve 2 through the double-threaded screw 5. The bottom side of the double-threaded screw 5 is fixedly connected to the column 9. The column 9 can slide with the extension and retraction of the internal threaded arc-shaped handrail 8. The bottom end of the upright plate 1 is fixedly installed with a horizontal groove 10. The lower end of the column 9 is slidably set inside the horizontal groove 10 through a slider. The double-threaded screw 5 drives the internal threaded arc-shaped handrail 8 to slide on both sides of the telescopic sleeve 2, which facilitates the adjustment of the spacing of the column 9, and thus adapts to various floor-to-ceiling windows for protection. A lifting mechanism 11 is rotatably installed at the bottom of the upright plate 1. Double-groove sliders 12 are slidably installed on both sides of the lifting mechanism 11 on the upright plate 1. A buffer mechanism 13 is installed on one side of the telescopic sleeve 2. The two ends of the buffer mechanism 13 are rotatably connected to the internally threaded arc-shaped handrail 8. The foot pedal lifting mechanism 11 makes the double-groove sliders 12 contact the ground, which can lift the guardrail as a whole. This makes it convenient for workers to crank the rocker arm 3 to drive the internally threaded arc-shaped handrail 8 to extend and retract. The telescopic sleeve 2 and the buffer mechanism 13 work together to buffer the impact force generated by the contact between the external object and the guardrail. Since no splicing is required, the risk of the guardrail bending is reduced. Among them, there are two internal thread arc-shaped handrails 8, with a telescopic range of 2-3m. The telescopic sleeve 2 and the horizontal groove 10 are of equal length, which facilitates the folding of the guardrail. There are two driving gears 4, driven gears 6 and chains 7, which are all set on both sides of the rocker arm 3, so that the double threaded screw 5 is subjected to more sufficient and even force, which can effectively avoid jamming and reduce the failure rate.

[0023] Furthermore, such as Figures 1-7As shown, the lower end of the column 9 passes through the horizontal groove 10 and extends below the horizontal groove 10. An installation block 901 is fixedly installed at the bottom end of the column 9. The bottom end of the installation block 901 is on the same horizontal line as the bottom end of the upright plate 1. Several evenly distributed railings 14 are slidably installed on the horizontal groove 10. Two railings 14 are connected by a chain rod. A railing sliding guide rail 902 is fixedly installed at the upper end of the column 9. The railing sliding guide rail 902 extends into the interior of the telescopic sleeve 2. The upper end of the railing 14 is slidably installed inside the railing sliding guide rail 902. The installation block 901 can be riveted to the ground with bolts. Its bottom side is on the same horizontal line as the bottom end of the upright plate 1. Then, through the lifting mechanism 11 and the double groove slider 12, the column 9 can be separated from the ground, reducing the sliding resistance of the column 9 and making the adjustment process more labor-saving. At the same time, such as Figures 1-7 As shown, U-shaped connecting plates 15 are fixedly installed at both ends of the horizontal groove 10 by bolts. The U-shaped connecting plates 15 are fixedly connected to the horizontal groove extension plate 16 by bolts. The posts 9 and railings 14 are slidably arranged inside the horizontal groove 10 and the horizontal groove extension plate 16. Both ends of the horizontal groove extension plate 16 are fixed by pins. When the length of the horizontal groove 10 is insufficient, the horizontal groove extension plate 16 can be connected by the U-shaped connecting plate 15 to increase the length of the horizontal groove 10. This prevents the posts 9 from detaching from the horizontal groove 10 during the sliding process and can effectively improve the stability of the guardrail that is easy to adjust the spacing between posts.

[0024] In addition, such as Figures 1-7 As shown, a push rod 903 is rotatably mounted on the column 9, and a side push post 904 is fixedly mounted on the push rod 903. Side push grooves 1401 are opened on both sides of the railing 14, and the side push post 904 is slidably mounted inside the side push grooves 1401. A support rod rotation guide groove 101 is opened on the upright plate 1, and the end of the push rod 903 away from the column 9 is slidably mounted inside the support rod rotation guide groove 101. A limit block 905 is rotatably mounted on the column 9, and the bottom end of the limit block 905 abuts against the upper side of the horizontal groove extension plate 16. The limit block 905 can rotate to engage with the horizontal groove. The friction generated by the extension plate 16 or the horizontal groove fixes the column 9. During the sliding process of the column 9, one end of the push rod 903 slides inside the support rod rotation guide groove 101. The length of the push rod 903 remains unchanged and it will rotate on the column 9. The side push column 904 cooperates with the side push groove 1401 on the railing 14 to push the railing 14 to slide in the railing sliding guide rail 902 and the horizontal groove 10. The side push columns 904 are evenly arranged, which can increase the spacing between the columns 9 and push the railing 14 to be evenly arranged. The spacing between the railings 14 is equal, which can improve the safety of the guardrail. The number of railings 14 is 3-6, which are symmetrically distributed on both sides of the upright plate 1. The number of side push posts 904 is twice the number of railings 14, and the side push posts 904 correspond one-to-one with the side push grooves 1401. The two side push posts 904 push the railings 14 to slide from both sides, which can improve the efficiency of automatic arrangement of the railings 14.

[0025] Furthermore, such as Figures 1-7 As shown, a pull rod sliding guide rail 201 is fixedly installed at the position corresponding to the buffer mechanism 13 of the telescopic sleeve 2. A fixing plate 202 is fixedly installed in the middle of the pull rod sliding guide rail 201. A buffer spring 203 is fixedly connected to the fixing plate 202. The end of the buffer spring 203 away from the telescopic sleeve 2 is connected to the buffer mechanism 13. The buffer mechanism 13 includes two pull rods 1301 and a hinge rod 1302. One end of the pull rod 1301 is rotatably mounted on the internally threaded arc-shaped handrail 8, and the other end of the pull rod 1301 is slidably mounted on the pull rod sliding guide rail 201. Two hinge rods 1302 are rotatably connected at one end to the middle of the pull rod 1301. The other ends of the two pull rods 1301 are hinged through the hinge rod. The upper and lower ends of the hinge rod are connected to the lugs of the buffer spring 203. During the sliding of the internal thread arc handrail 8, one end of the pull rod 1301 slides to both sides inside the pull rod sliding guide rail 201. The two hinge rods 1302 change their angle by hinged rotation until they reach the limit of a vertical state. The upper and lower ends of the hinge rod are connected to the buffer spring 203 to prevent the hinge rod 1302 from folding inward and breaking when it comes into contact with the telescopic sleeve 2. When the telescopic sleeve 2 is slightly deformed by an impact from an external object, the pull rod 1301 slides to both sides through the pull rod sliding guide rail 201, and the hinge rod 1302 will bear the pulling force of the pull rod 1301. The angle of the two hinge rods 1302 will increase, and the buffer spring 203 will tighten the hinge rod at the connection of the hinge rod 1302 under the action of the elastic force, thereby buffering the impact force of the telescopic sleeve 2 and effectively extending the service life of the guardrail.

[0026] Furthermore, such as Figures 1-7 As shown, the rocker arm 3 passes through the upright plate 1 at both ends and extends to both sides of the upright plate 1. A rotating sleeve 301 is rotatably provided in the middle of the rocker arm 3. The threads of the two ends of the double threaded screw 5 are opposite in direction. The two internal threaded arc-shaped handrails 8 are slidably disposed inside the telescopic sleeve 2 through the rotation of the double threaded screw 5. The rotating sleeve 301 makes it convenient for the staff to hold and shake the rocker arm 3. The threads of the two internal threaded arc-shaped handrails 8 are opposite in direction, and the threads of the double threaded screw 5 are also opposite in direction. Through the meshing of the threads of the two, the upright column 9 is made to slide in the opposite direction, realizing the spacing adjustment function of the upright column 9.

[0027] Furthermore, such as Figure 6As shown, the lifting mechanism 11 includes a shaft 1101 and a pedal 1102 fixedly connected to one side of the shaft 1101. The shaft 1101 passes through the vertical plate 1 and extends to both sides of the vertical plate 1. The two ends of the shaft 1101 are fixedly connected to irregular wheels 1103. The upper end of the double-groove slider 12 abuts against the upper end of the irregular wheel 1103 through an arc surface. A return spring 1201 is fixedly installed on the bottom side of the double-groove slider 12. The return spring 1201 is fixedly installed inside the vertical plate 1. After the pedal 1102 is released, the double-groove slider 12 can be reset by the return spring 1201. The worker steps on pedal 1102, which rotates the irregular wheel 1103 via shaft 1101. During the rotation of the irregular wheel 1103, its wider side contacts the upper arc surface of the double-groove slider 12, causing the double-groove slider 12 to slide downwards. As the double-groove slider 12 slides downwards, its bottom side contacts the ground, thereby separating the bottom of the upright plate 1 from the ground. At the same time, the worker shakes the rocker arm 3 to adjust the distance between the uprights 9. This operation can be done by one person, is simple and quick, and effectively reduces labor costs.

[0028] like Figures 1-7 As shown in the figure, the principle of the guardrail with adjustable post spacing provided in this embodiment is as follows: The rocker arm 3 is used to drive the drive gear 4 to rotate. The driven gear 6 is rotatably connected to the drive gear 4 via a chain 7. The drive gear 4 drives the driven gear 6 to rotate via the chain 7, which in turn drives the double-threaded screw 5 to rotate within the telescopic sleeve 2 via bearings. By manually cranking the rocker arm 3, the drive gear 4 is driven to rotate, and the drive gear 4 drives the double-threaded screw 5 to rotate via the chain 7. Both ends of the double-threaded screw 5 are connected to internally threaded arc-shaped handrails 8 via threaded engagement. The internally threaded arc-shaped handrails 8 are slidably disposed inside the telescopic sleeve 2 via the double-threaded screw 5. A column 9 is fixedly connected to the bottom side of the double-threaded screw 5. The column 9 can slide along with the extension and retraction of the internally threaded arc-shaped handrails 8. The bottom end of the upright plate 1... A horizontal groove 10 is fixedly installed, and the lower end of the column 9 is slidably set inside the horizontal groove 10 via a slider. The double-threaded screw 5 drives the internally threaded arc-shaped handrail 8 to slide on both sides of the telescopic sleeve 2, which facilitates the adjustment of the spacing of the column 9 and thus adapts to various floor-to-ceiling windows for protection. The two ends of the buffer mechanism 13 are rotatably connected to the internally threaded arc-shaped handrail 8. The foot-operated lifting mechanism 11 makes the double-groove slider 12 contact the ground, which can lift the guardrail as a whole, making it convenient for workers to crank the rocker arm 3 to drive the internally threaded arc-shaped handrail 8 to extend and retract. The telescopic sleeve 2 cooperates with the buffer mechanism 13 to buffer the impact force generated by the contact between the external object and the guardrail, and no splicing is required, thus reducing the risk of the guardrail bending.

[0029] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0030] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0031] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A guardrail with adjustable post spacing, comprising a vertical plate (1) and a telescopic sleeve (2) fixedly installed on the vertical plate (1), characterized in that: The upright plate (1) is rotatably equipped with a rocker arm (3), and the two ends of the rocker arm (3) are fixedly installed with a drive gear (4). The telescopic sleeve (2) is rotatably equipped with a double threaded screw (5) through a bearing. The double threaded screw (5) is fixedly installed with a driven gear (6), and the driven gear (6) and the drive gear (4) are rotatably connected through a chain (7). The two ends of the double threaded screw (5) are connected to the internal threaded arc handrail (8) by thread engagement. The internal threaded arc handrail (8) is slidably disposed inside the telescopic sleeve (2) through the double threaded screw (5). The bottom side of the double threaded screw (5) is fixedly connected to the column (9). The bottom end of the upright plate (1) is fixedly installed with a horizontal groove (10). The lower end of the column (9) is slidably disposed inside the horizontal groove (10) through a slider. The bottom end of the upright plate (1) is rotatably provided with a lifting mechanism (11), and the upright plate (1) is slidably provided with double groove sliders (12) on both sides of the lifting mechanism (11). A buffer mechanism (13) is provided on one side of the telescopic sleeve (2), and the two ends of the buffer mechanism (13) are rotatably connected to the internal thread arc handrail (8). A pull rod sliding guide rail (201) is fixedly provided at the position corresponding to the buffer mechanism (13) of the telescopic sleeve (2). A fixing plate (202) is fixedly installed in the middle of the pull rod sliding guide rail (201). A buffer spring (203) is fixedly connected on the fixing plate (202). The end of the buffer spring (203) away from the telescopic sleeve (2) is connected to the buffer mechanism (13). The buffer mechanism (13) includes two pull rods (1301) and a hinge rod (1302). One end of the pull rod (1301) is rotatably mounted on the internal thread arc-shaped handrail (8), and the other end of the pull rod (1301) is slidably mounted on the pull rod sliding guide rail (201). One end of the two hinge rods (1302) is rotatably connected to the middle part of the pull rod (1301), and the other ends of the two hinge rods (1302) are hinged by a hinge rod. The upper and lower ends of the hinge rod are connected to the lugs of the buffer spring (203).

2. The guardrail with adjustable post spacing according to claim 1, characterized in that: The lower end of the column (9) passes through the horizontal groove (10) and extends below the horizontal groove (10). A mounting block (901) is fixedly installed at the bottom end of the column (9). The bottom end of the mounting block (901) is on the same horizontal line as the bottom end of the upright plate (1). Several evenly distributed railings (14) are slidably installed on the horizontal groove (10). Two railings (14) are connected by a chain rod. A railing sliding guide rail (902) is fixedly installed at the upper end of the column (9). The railing sliding guide rail (902) extends into the interior of the telescopic sleeve (2). The upper end of the railing (14) is slidably installed inside the railing sliding guide rail (902).

3. A guardrail with adjustable post spacing according to claim 2, characterized in that: The two ends of the transverse groove (10) are fixedly installed with U-shaped connecting plates (15) by bolts. The U-shaped connecting plates (15) are fixedly connected with transverse groove extension plates (16) by bolts. The column (9) and the railing (14) are slidably arranged inside the transverse groove (10) and the transverse groove extension plates (16). Both ends of the transverse groove extension plates (16) are fixed by pins.

4. A guardrail with adjustable post spacing according to claim 3, characterized in that: A push rod (903) is rotatably mounted on the column (9), and a side push rod (904) is fixedly mounted on the push rod (903). Side push grooves (1401) are opened on both sides of the railing (14), and the side push rod (904) is slidably mounted inside the side push grooves (1401). A support rod rotation guide groove (101) is opened on the upright plate (1), and the end of the push rod (903) away from the column (9) is slidably mounted inside the support rod rotation guide groove (101). A limit block (905) is rotatably mounted on the column (9), and the bottom end of the limit block (905) abuts against the upper side of the horizontal groove extension plate (16).

5. A guardrail with adjustable post spacing according to claim 1, characterized in that: The rocker arm (3) passes through the vertical plate (1) at both ends and extends to both sides of the vertical plate (1). A rotating sleeve (301) is rotatably provided in the middle of the rocker arm (3). The threads at both ends of the double threaded screw (5) are opposite in direction. The two internal threaded arc-shaped handrails (8) are slidably disposed inside the telescopic sleeve (2) through the rotation of the double threaded screw (5).

6. A guardrail with adjustable post spacing according to claim 1, characterized in that: The lifting mechanism (11) includes a shaft (1101) and a pedal (1102) fixedly connected to one side of the shaft (1101). The shaft (1101) passes through the upright plate (1) and extends to both sides of the upright plate (1). The two ends of the shaft (1101) are fixedly connected to irregular wheels (1103).

7. A guardrail with adjustable post spacing according to claim 6, characterized in that: The upper end of the double-groove slider (12) abuts against the upper end of the irregular wheel (1103) through the arc surface. A reset spring (1201) is fixedly installed on the bottom side of the double-groove slider (12), and the reset spring (1201) is fixedly installed inside the vertical plate (1).

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