A pole assembly and a protective railing

Abstract

The present invention discloses a vertical pole assembly and a guardrail, comprising an inner tie rod and a vertical pole sleeved on the outer surface of the inner tie rod, a vertical pole bottom bolt plate is provided at the bottom of the vertical pole, the inner tie rod and the vertical pole can move relatively, an inner tie rod bottom bolt plate is provided at the bottom of the inner tie rod, a four-rod assembly is hinged between the vertical pole bottom bolt plate and the inner tie rod bottom bolt plate, a fixing assembly is provided on the outer surface of the vertical pole, and a nut assembly is provided between the upper end of the vertical pole and the inner tie rod to fix the two. The present invention has a simple structure, makes the assembly and disassembly of the vertical pole more convenient and efficient, effectively improves the assembly efficiency, and can recycle the vertical pole assembly.

Description

Technical Field

[0001] The invention relates to a protective component in the field of engineering construction research, in particular to a vertical pole assembly and also to a protective railing. Background Art

[0002] As a common facility in construction production and road traffic, guardrails are closely related to people's work and life, and their application in construction production is particularly important. It has always been an important means of protection for safe production, but conventional construction railings have many shortcomings. Commonly used construction railings are divided into fixed and mobile types. Fixed railings generally use a method in which an anchor fixing seat is set at the bottom and the upper part is connected to a movable railing. The advantage of this type of railing is good stability, but when it needs to be removed, the anchor seat will be wasted. When temporary removal is required during construction, the anchor seat is provided with a fixed screw rod, which is easy to be damaged. At the same time, there is a large waste of materials and labor during removal. Mobile railings are easy to move, but they have disadvantages such as poor stability and the leg area taking up more space. Summary of the invention

[0003] The object of the present invention is to provide a vertical pole assembly with simple structure and convenient assembly and disassembly.

[0004] Also provided is a protective railing with a simple structure and convenient assembly and disassembly.

[0005] The solution to the technical problem solved by the present invention is: a vertical pole assembly, including an inner pull rod and a vertical pole sleeved on the outer surface of the inner pull rod, a vertical pole bottom bolt plate is provided at the bottom of the vertical pole, the inner pull rod and the vertical pole can move relatively, an inner pull rod bottom bolt plate is provided at the bottom of the inner pull rod, a four-rod assembly is hinged between the vertical pole bottom bolt plate and the inner pull rod bottom bolt plate, a fixing assembly is provided on the outer surface of the vertical pole, and a nut assembly is provided between the upper end of the vertical pole and the inner pull rod to fix the two.

[0006] The above-mentioned vertical pole assembly has at least the following beneficial effects: rotating the nut assembly to press down the inner tie rod, so that the maximum outer diameter of the four-rod assembly is smaller than the inner diameter of the installation hole at the construction site, which is convenient for placing the vertical pole and the inner tie rod in the installation hole at the construction site; rotating the nut assembly to pull the inner tie rod outward to expand the four-rod assembly; the expanded four-rod assembly is fully fixed to the bottom edge of the installation hole; the fixing assembly is pressed at the entrance of the installation hole to fix the vertical pole; and the guardrail between the vertical poles is installed to form an effective separation protection. When the vertical pole needs to be temporarily removed, it is only necessary to loosen the nut assembly and press down the inner tie rod to shrink the four-rod assembly. The maximum outer diameter of the four-rod assembly is smaller than the inner diameter of the installation hole at the construction site, and the vertical pole can be taken out of the hole. Compared with the prior art, the present invention has a simple structure, which makes the assembly and disassembly of the vertical pole more convenient and efficient, effectively improves the assembly efficiency, and the vertical pole assembly can be recycled.

[0007] As a further improvement of the above technical solution, the four-bar assembly includes two upper hinges and two lower hinges, one end of the upper hinge is hinged to the bottom bolt plate of the vertical pole, the other end of the upper hinge is hinged to one end of the lower hinge, and the other end of the lower hinge is hinged to the bottom bolt plate of the inner tie rod. The hinge point of the upper hinge and the lower hinge is the first point, and the maximum distance between the two first points is the maximum outer diameter of the four-bar assembly. When the inner tie rod is pressed down, the distance between the bottom bolt plate of the inner tie rod and the bottom bolt plate of the vertical pole increases, the upper hinge and the lower hinge shrink inward, and the maximum distance between the two first points decreases. When the inner tie rod is pulled outward, the distance between the bottom bolt plate of the inner tie rod and the bottom bolt plate of the vertical pole decreases, the upper hinge and the lower hinge expand outward, and the maximum distance between the two first points increases.

[0008] As a further improvement of the above technical solution, the fixing assembly includes an inner thread sleeve fixed to the outer surface of the vertical pole and an outer thread sleeve screwed to the outer surface of the inner thread sleeve, the outer surface of the inner thread sleeve is provided with an outer thread, the inner surface of the outer thread sleeve is provided with an inner thread, and the outer surface of the outer thread sleeve is provided with a pressing portion. The outer thread sleeve rotates relative to the inner thread sleeve, and the position of the outer thread sleeve can be adjusted so that the pressing portion can directly press the installation hole of the construction site to fix the vertical pole.

[0009] As a further improvement of the above technical solution, it also includes a base arranged below the pressing part, a base hole is arranged in the middle of the base, an embedded part is arranged on the lower end surface of the base, the embedded part is arranged beside the base hole, and the outer diameter of the lower end of the embedded part is smaller than the outer diameter of the upper end of the embedded part. The embedded part is inserted into the installation hole of the construction site, and the outer thread sleeve rotates relative to the inner thread sleeve to adjust the position of the outer thread sleeve so that the pressing part can directly press the base to fix the vertical rod.

[0010] As a further improvement of the above technical solution, it also includes a base rubber pad sleeved on the lower end surface of the base, and the base rubber pad is provided with a bent portion that fits with the outer surface of the embedded portion. The base rubber pad is located between the base and the construction site, and the bent portion extends into the installation hole of the construction site. The base rubber pad plays a role in stopping water and ensuring a tight connection.

[0011] As a further improvement of the above technical solution, the nut assembly includes a first nut disposed on the upper end surface of the vertical rod, the upper end of the inner pull rod passes through the first nut, and the outer surface of the upper end of the inner pull rod is provided with a first thread that matches the nut at one end. By rotating the first nut, the inner pull rod can be pressed down or pulled outward.

[0012] As a further improvement of the above technical solution, a protective cap is provided at the upper end of the vertical pole, the protective cap is fixed to the vertical pole by a fastening screw rod, and the upper end of the inner pull rod extends into the protective cap. The protective cap shields the upper end of the inner pull rod and the upper end of the vertical pole to play a protective role.

[0013] As a further improvement of the above technical solution, a limiting ring is provided on the inner surface of the protective cap, and the tightening screw is located below the limiting ring. The limiting ring is pressed onto the upper end surface of the vertical pole or the upper end surface of the blocking plate, positioning the protective cap and pressing the blocking plate onto the vertical pole.

[0014] The guardrail comprises at least two of the above-mentioned vertical pole assemblies, and a guardrail is arranged between two adjacent vertical pole assemblies.

[0015] The above-mentioned guardrail has at least the following beneficial effects: the present invention has a simple structure, which makes the assembly and disassembly of the vertical pole more convenient and efficient, effectively improves the assembly efficiency, and the vertical pole assembly and the guardrail can be recycled.

[0016] As a further improvement of the above technical solution, two adjacent guardrails are connected by a connecting plate, a connecting screw and a nut. After the connecting screw passes through the connecting plate and the guardrail, the nut is screwed into the connecting screw to fix the two guardrails. After the connecting screw passes through the connecting plate, the guardrail and the vertical pole, the nut is screwed into the connecting screw to fix the guardrail and the vertical pole. The connection method of the nut is easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of the structure of the vertical rod and the inner pull rod in the embodiment of the present invention;

[0019] Figure 2 2 is a schematic diagram of the structure of the inner thread sleeve and the outer thread sleeve in an embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the structure of a protective cap in an embodiment of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the upright pole assembly in the embodiment of the present invention when it is working;

[0022] Figure 5 It is a schematic diagram of the structure of the guardrail in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Reference Figure 1 to Figure 4 A vertical pole assembly comprises an inner tie rod 13 and a vertical pole 10 sleeved on the outer surface of the inner tie rod 13, a vertical pole bottom bolt plate 14 is provided at the bottom of the vertical pole 10, the inner tie rod 13 and the vertical pole 10 can move relatively, an inner tie rod bottom bolt plate 15 is provided at the bottom of the inner tie rod 13, a four-rod assembly is hinged between the vertical pole bottom bolt plate 14 and the inner tie rod bottom bolt plate 15, a fixing assembly is provided on the outer surface of the vertical pole 10, and a nut assembly is provided between the upper end of the vertical pole 10 and the inner tie rod 13 to fix the two.

[0028] The nut assembly is rotated to press the inner tie rod 13 downward, so that the maximum outer diameter of the four-bar assembly is smaller than the inner diameter of the installation hole at the construction site, which is convenient for placing the vertical pole 10 and the inner tie rod 13 in the installation hole at the construction site. The nut assembly is rotated to pull the inner tie rod 13 outward, so that the four-bar assembly expands. The expanded four-bar assembly is fully fixed to the bottom edge of the installation hole. The fixing assembly is pressed at the entrance of the installation hole to fix the vertical pole 10. The guardrail between the vertical poles 10 is installed to form an effective separation protection. When the vertical pole 10 needs to be temporarily removed, it is only necessary to loosen the nut assembly and press the inner tie rod 13 downward to shrink the four-bar assembly. The maximum outer diameter of the four-bar assembly is smaller than the inner diameter of the installation hole at the construction site, and the vertical pole 10 can be taken out of the hole. Compared with the prior art, the structure is simple, making the assembly and disassembly of the vertical pole 10 more convenient and efficient, effectively improving the assembly efficiency, and the vertical pole 10 assembly can be recycled.

[0029] The installation holes at the construction site are made by drilling holes in the concrete surface. In this way, when the railing needs to be removed, the railing in the hole can be directly taken out, and the hole position is easy to block. The small hole will not affect the driving and mechanical running. When temporary removal is required, the hole is filled with paper or the hole mouth is simply covered. The hole mouth is level with the ground and is not easily damaged. After the construction is completed, the hole is cleaned up and the guardrail can be quickly restored using this device.

[0030] When the concrete floor needs to be installed, you only need to use a hole finder to make holes on the ground. Holes of different diameters can be made according to the size of the railing. You can also use pipes to directly reserve holes before the concrete hardens. For conventional guardrails, holes have little impact on production and are easy to block.

[0031] For soil surfaces, the same effect can be achieved by using pipes buried in the soil as installation holes at the construction site.

[0032] The invention has the advantages of strong stability, convenient and flexible disassembly and assembly, and the installation hole in the use site is a hole structure with little impact on production and living facilities and is not easy to be damaged. It can prevent rainwater from entering the facilities and is worthy of promotion in construction production.

[0033] The present invention adopts high-strength low-carbon alloy steel (Q345B) material and hot-dip galvanizing anti-corrosion treatment. The service life is 30 to 50 years. The overall device is assembled from multiple parts. When individual parts are damaged, they can be partially replaced, which will have better economic effects.

[0034] The four-bar assembly includes two upper hinges 16 and two lower hinges 17. One end of the upper hinge 16 is hinged to the bottom bolt plate 14 of the vertical pole, the other end of the upper hinge 16 is hinged to one end of the lower hinge 17, and the other end of the lower hinge 17 is hinged to the bottom bolt plate 15 of the inner tie rod. The hinge point of the upper hinge 16 and the lower hinge 17 is the first point, and the maximum distance between the two first points is the maximum outer diameter of the four-bar assembly. When the inner tie rod 13 is pressed down, the distance between the bottom bolt plate 15 of the inner tie rod and the bottom bolt plate 14 of the vertical pole increases, the upper hinge 16 and the lower hinge 17 shrink inward, and the maximum distance between the two first points decreases. When the inner tie rod 13 is pulled outward, the distance between the bottom bolt plate 15 of the inner tie rod and the bottom bolt plate 14 of the vertical pole decreases, the upper hinge 16 and the lower hinge 17 expand outward, and the maximum distance between the two first points increases.

[0035] The fixing assembly includes an inner thread sleeve 18 fixed to the outer surface of the vertical pole 10 and an outer thread sleeve 19 screwed to the outer surface of the inner thread sleeve 18, wherein the outer surface of the inner thread sleeve 18 is provided with an outer thread, the inner surface of the outer thread sleeve 19 is provided with an inner thread, and the outer surface of the outer thread sleeve 19 is provided with a pressing portion. The outer thread sleeve 19 rotates relative to the inner thread sleeve 18, and the position of the outer thread sleeve 19 can be adjusted so that the pressing portion can directly press the installation hole of the construction site to fix the vertical pole 10.

[0036] It also includes a base 20 disposed below the pressing part, a base hole is disposed in the middle of the base 20, an embedded part 22 is disposed on the lower end surface of the base 20, the embedded part 22 is disposed beside the base hole, and the outer diameter of the lower end of the embedded part 22 is smaller than the outer diameter of the upper end of the embedded part 22. The embedded part 22 is inserted into the installation hole of the construction site, and the outer thread sleeve 19 rotates relative to the inner thread sleeve 18, and the position of the outer thread sleeve 19 can be adjusted, so that the pressing part can directly press the base 20 to fix the upright pole 10.

[0037] It also includes a base rubber pad 21 sleeved on the lower end surface of the base 20, and the base rubber pad 21 is provided with a bent portion that fits the outer surface of the embedded portion 22. The base rubber pad 21 is located between the base 20 and the construction site, and the bent portion extends into the installation hole of the construction site. The base rubber pad 21 plays the role of water stopping and ensuring a tight connection.

[0038] The nut assembly includes a first nut 12 disposed on the upper end surface of the vertical rod 10, a plugging plate 11 is also disposed on the upper end surface of the vertical rod 10, the upper end of the inner pull rod 13 passes through the plugging plate 11 and the first nut 12 in sequence, and a first thread matching the nut is disposed on the upper end outer surface of the inner pull rod 13. By rotating the first nut 12, the inner pull rod 13 can be pressed down or pulled outward.

[0039] The upper end of the vertical pole 10 is provided with a protective cap 23, which is fixed to the vertical pole 10 by a fastening screw 25, and the upper end of the inner pull rod 13 extends into the protective cap 23. The protective cap 23 shields the upper end of the inner pull rod 13 and the upper end of the vertical pole 10 to play a protective role.

[0040] The inner surface of the protective cap 23 is provided with a limiting ring 24, and the tightening screw 25 is located below the limiting ring 24. The limiting ring 24 is pressed onto the upper end surface of the vertical pole 10 or the upper end surface of the blocking plate 11, positioning the protective cap 23 and pressing the blocking plate 11 onto the vertical pole 10.

[0041] like Figure 5 As shown, the guardrail includes at least two of the above-mentioned vertical pole assemblies 100, and a guardrail 101 is provided between two adjacent vertical pole assemblies 100.

[0042] The guardrail has a simple structure, which makes the assembly and disassembly of the upright pole 10 more convenient and efficient, effectively improves the assembly efficiency, and the upright pole 10 components and the guardrail can be recycled.

[0043] Two adjacent guardrails 101 are connected by a connecting plate 102, a connecting screw and a nut. After the connecting screw passes through the connecting plate 102 and the guardrail 101, the nut is screwed into the connecting screw to fix the two guardrails 101. After the connecting screw passes through the connecting plate 102, the guardrail 101 and the upright 10, the nut is screwed into the connecting screw to fix the guardrail 101 and the upright 10. The connection method of the nut is convenient for disassembly and assembly.

[0044] The following are preferred embodiments of the present invention:

[0045] The main rod is made of a square steel tube with a side length of 5 cm and a wall thickness of 3 mm. The height is 130 cm. The plugging plate 11 is made of a steel plate with a side length of 5 cm and a thickness of 0.5 cm, with a circular hole of 1.5 cm in diameter in the middle. The plugging plate 11 and the main rod are welded.

[0046] The bolt plate 14 at the bottom of the vertical pole is composed of a panel and a bolt seat. The panel is made of a steel plate with a side length of 5 cm and a thickness of 0.5 cm, and a circular hole with a diameter of 1.5 cm is opened in the middle. The bolt seat is composed of four semicircular plates with a thickness of 0.45 cm and a one-way semicircular plate at the bottom. The outer radius of the semicircular plate is 0.75 cm and the inner radius is 0.35 cm. The iron plate with a height of 1.3 cm and a width of 1.5 cm is connected to the semicircular plate. The outer edge of the iron plate is 0.2 cm away from the outer edge of the panel, and the two are arranged symmetrically. The net distance between the two iron plates on the same side is 0.6 cm. The bolt connected to the bolt hole of the bolt seat is 0.5 cm thick and 2 cm long. The center of the bolt clamping hole is 0.25 cm away from the end of the bolt, and the bolt hole has a diameter of 0.3 cm. After the bolt is inserted into the bolt seat hole, the nail hole is inserted into the retaining spring for fixing.

[0047] The inner pull rod 13 is made of 1cm diameter round steel, 145cm long, and 20cm threaded on the top. The inner pull rod 13 bottom is connected with the inner pull rod bottom bolt plate 15.

[0048] The inner pull rod bottom bolt plate 15 is composed of a bottom supporting plate and a bolt inserting plate. The bottom supporting plate is a circular plate with a thickness of 0.5 cm and a diameter of 5 cm.

[0049] The bolt plate is composed of two 0.45cm thick semicircular plates, the top of which is a one-way semicircular plate with a circular hole of 0.75cm outer radius and 0.35cm inner radius. The connection with the semicircular plate is an iron plate of 1.3cm high and 1.5cm wide. The two positions of the iron plate are arranged symmetrically along the center, and the outer edge of the iron plate is 0.2cm away from the outer edge of the panel.

[0050] The upper hinge 16 and the lower hinge 17 are connected by bolts. The lower hinge 17 is made of square iron with a length of 7 cm, a width of 1.5 cm, and a thickness of 1.5 cm. The outer ends of the lower hinge 17 are semicircular arcs with a diameter of 1.5 cm. A hole with a diameter of 0.6 cm is opened in the center of the semicircular arc, and the hole is through on both sides. A 0.6 cm notch is opened in the middle, and the notch is 2 cm deep.

[0051] The lower hinge 17 is connected to the inner tie rod bottom bolt plate 15 via bolts.

[0052] The upper folding leaf 16 is made of square iron with a length of 7 cm, a width of 1.5 cm, and a thickness of 1.5 cm. The outer ends of the upper folding leaf 16 are semicircular arcs with a diameter of 1.5 cm, and a hole with a diameter of 0.6 cm is opened in the center of the semicircular arc. A plug with a width of 0.5 cm and a height of 2 cm is left in the middle of the two ends of the upper folding leaf 16, and the rest is cut off.

[0053] The upper part of the upper hinge 16 is connected to the bottom bolt plate 14 of the upright pole by bolts.

[0054] The inner thread sleeve 18 is composed of a circular hollow tube with an outer diameter of 8 cm, a thickness of 0.45 cm, and a height of 10 cm. The outer side of the inner thread sleeve 18 is covered with an outer thread seat, and the outer thread is arranged on the outer thread seat. The inner side of the inner thread sleeve 18 is welded to the vertical pole 10 through a 0.4 cm thick steel plate. The steel plate completely seals the gap between the inner thread sleeve 18 and the vertical pole 10, and is fully welded from top to bottom.

[0055] The outer sleeve is made of a hollow tube with an inner diameter of 7.66, an outer diameter of 8.66, and a height of 3cm. The inner sleeve is set in the inner sleeve, and the inner thread is set in the inner sleeve. The inner sleeve and the outer sleeve are engaged. For easy rotation, the outer sleeve is welded with a 0.5cm thick steel plate on all four sides. The upper part of the steel plate is 2.5cm wide and 1.5cm wide, and the lower part is 0.5cm wide and 0.5cm wide. This steel plate is the pressing part.

[0056] The base is composed of two parts, the upper part is a circular hollow ring plate with an outer diameter of 14 cm, an inner diameter of 8.5 cm, and a thickness of 0.5 cm, and the lower part is an upper funnel-shaped hollow ring body, which is the embedded part 22. The upper part of the upper funnel-shaped hollow ring body has an outer diameter of 10 cm, an inner diameter of 8.5 cm, and a height of 1.5 cm.

[0057] The protective cap 23 is a square tube with an outer side length of 6 cm, an inner side length of 5.2 cm, a thickness of 0.4 cm, and a height of 10 cm. The upper part of the square tube is sealed, and the lower part of the square tube is open. Two tightening screw rods 25 are arranged 1.5 cm upward from the lower part of the square tube. The two tightening screw rods 25 are symmetrically arranged.

[0058] The following is the process of installing the guardrail:

[0059] Setting the installation hole at the construction site: dig a hole in the concrete floor, and remove about 5 cm of soil under the hardened layer. Because the present invention uses the bottom of the hole on the concrete hardened surface as the expansion folding fulcrum, the depth of the hole should be greater than the thickness of the hardened layer.

[0060] After the hole is taken, the vertical pole 10 is installed at the hole mouth. First, the base rubber pad 21 and the base 20 are placed above the hole mouth in sequence, and the base rubber pad and the base hole are aligned with the installation hole at the construction site.

[0061] Put the assembled vertical pole 10 into the hole. Press the inner pull rod 13 downward so that it can enter the hole.

[0062] The outer thread sleeve 19 is installed, and the rubber pad is placed in the lower part of the outer thread sleeve 19. The outer thread sleeve 19 is tightened to tighten the vertical pole 10 in the horizontal direction and upward direction of the hole. Then the first nut 12 on the inner pull rod 13 is rotated to expand the bottom fold of the vertical pole 10. After the fold is expanded, it is fully fixed with the bottom edge of the hole. Through the continuous adjustment of the outer thread sleeve 19 and the first nut 12, the vertical pole 10 can be fully fixed with the hole. And the height of the vertical pole 10 can be adjusted in a small range.

[0063] Fix the poles 10 and install the guardrails between the poles 10 to form effective separation and protection. When the poles 10 need to be temporarily removed, just loosen the first nut 12 to remove the poles 10 from the holes. Repeat the installation process when it is necessary to restore.

[0064] The above is a specific description of the preferred implementation mode of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pole assembly, characterized in that: It includes an inner pull rod and a vertical rod sleeved on the outer surface of the inner pull rod, a vertical rod bottom bolt plate is provided at the bottom of the vertical rod, the inner pull rod and the vertical rod can move relatively, an inner pull rod bottom bolt plate is provided at the bottom of the inner pull rod, a four-rod assembly is hinged between the vertical rod bottom bolt plate and the inner pull rod bottom bolt plate, a fixing assembly is provided on the outer surface of the vertical rod, a nut assembly is provided between the upper end of the vertical rod and the inner pull rod to fix the two, the fixing assembly includes an inner thread sleeve fixed to the outer surface of the vertical rod and an outer thread sleeve screwed on the outer surface of the inner thread sleeve, the outer surface of the inner thread sleeve is provided with an external thread, the inner surface of the outer thread sleeve is provided with an internal thread, and the outer surface of the outer thread sleeve is provided with a pressing portion , also includes a base arranged below the pressing part, a base hole is provided in the middle of the base, an embedded part is provided on the lower end surface of the base, the embedded part is arranged next to the base hole, the outer diameter of the lower end of the embedded part is smaller than the outer diameter of the upper end of the embedded part, the nut assembly includes a first nut arranged on the upper end surface of the vertical pole, the upper end of the inner pull rod passes through the first nut, and the upper end outer surface of the inner pull rod is provided with a first thread at one end matching the nut, wherein the four-bar assembly includes two upper hinges and two lower hinges, one end of the upper hinge is hinged to the bottom bolt plate of the vertical pole, the other end of the upper hinge is hinged to one end of the lower hinge, and the other end of the lower hinge is hinged to the bottom bolt plate of the inner pull rod.

2. The pole assembly according to claim 1, characterized in that: It also includes a base rubber pad sleeved on the lower end surface of the base, and the base rubber pad is provided with a bending portion that fits with the outer surface of the embedded portion.

3. The pole assembly according to claim 1, characterized in that: A protective cap is provided at the upper end of the vertical pole, and the protective cap is fixed to the vertical pole by a tightening screw rod, and the upper end of the inner pull rod extends into the protective cap.

4. The pole assembly according to claim 3, characterized in that: A limiting ring is arranged on the inner surface of the protective cap, and the fastening screw rod is located below the limiting ring.

5. Guardrail, characterized by: It comprises at least two upright pole assemblies as claimed in any one of claims 1 to 4, and a guardrail is provided between two adjacent upright pole assemblies.

6. The protective railing according to claim 5, characterized in that: Two adjacent guardrails are connected via a connecting plate, a connecting screw rod and a nut.

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