Rapidly-assembled protective fence and assembling method thereof

Abstract

The invention belongs to the technical field of guardrails, and particularly relates to a rapidly-assembled protective guard and an assembling method thereof.The rapidly-assembled protective guard comprises transverse pipes and vertical pipes, the transverse pipes are connected with the vertical pipes in an inserted mode through inserting parts arranged on the transverse pipes, the inserting parts and the transverse pipes are designed in an integrated or split mode, and limiting assemblies are clamped in the transverse pipes; a V-shaped elastic buckle is inserted into the vertical pipe, locking contacts are arranged at the two ends of the V-shaped elastic buckle, positioning holes are correspondingly formed in the two sides of the vertical pipe, the locking contacts stretch out of the corresponding positioning holes and are in clamping fit with the limiting assemblies, and firm connection between the transverse pipe and the vertical pipe is achieved. Standardized prefabricated assemblies are adopted for the transverse pipe and the vertical pipe, the transverse pipe and the vertical pipe are assembled in an inserted mode, a traditional welding technology is avoided, a clamping mechanism of a V-shaped elastic buckle and a positioning hole is adopted, the automatic attaching design of a pre-bent clamping tongue is combined, the transverse pipe and the vertical pipe are locked after being inserted, the installation efficiency is greatly improved, local replacement is allowed during maintenance, and the overall structure does not need to be disassembled.

Description

Technical Field

[0001] The present invention relates to the technical field of guardrails, and in particular to a quick-assembly type guardrail and an assembling method thereof. Background Art

[0002] Guardrails are used to protect, isolate, or guide pedestrian and vehicle traffic, as well as to prevent people or objects from accidentally falling or crossing. They are widely used in various places, including but not limited to roads, bridges, highways, railways, airports, parks, residential areas, factories, schools, and stadiums.

[0003] Current technology generally uses welded fasteners to construct guardrails. However, this design has multiple limitations. Once welded, they are difficult to adjust, and weld points are susceptible to corrosion, creating potential safety hazards and compromising the aesthetics. Furthermore, welding requires high professional skills, increasing production costs. Furthermore, the complex assembly process is not only time-consuming and labor-intensive, but also leads to low assembly efficiency, making it difficult to meet modern demands for efficiency and convenience. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention proposes a quick-assembly guardrail and an assembly method thereof. Through modular design, the guardrail is decomposed into multiple components that are easy to assemble and disassemble, thereby simplifying the installation process and improving assembly efficiency.

[0005] On the one hand, in order to achieve the above-mentioned purpose, the present invention provides a quick-assembly guardrail, comprising at least two horizontal tubes arranged horizontally and at least two vertical tubes arranged vertically; the horizontal tubes are plug-in connected to the vertical tubes through an inserting portion provided thereon, so that the horizontal tubes and the vertical tubes are in a vertical fixed posture or form a parallelogram connection posture, and the inserting portion and the horizontal tube are of an integrated or split design; a limiting assembly is installed inside the horizontal tube, and a V-shaped spring buckle is inserted inside the vertical tube, and locking contacts are provided at both ends of the V-shaped spring buckle, and positioning holes are opened on both sides of the vertical tube. The locking contacts extend from the corresponding positioning holes and form a snap fit with the limiting assembly to achieve a firm connection between the horizontal tube and the vertical tube.

[0006] Preferably, the insertion portion includes a first through hole and a second through hole correspondingly opened on both sides of the horizontal tube, a first pre-bent tongue is provided on one side of the hole wall of the first through hole, and a second pre-bent tongue is provided on one side of the hole wall of the second through hole, the second pre-bent tongue and the first pre-bent tongue are distributed diagonally, and the vertical tube passes through the first through hole and the second through hole to realize plug-in assembly; in the assembled state, the first pre-bent tongue and the second pre-bent tongue respectively abut against the vertical tube or fit against the vertical tube, so that the horizontal tube and the vertical tube are in a vertical fixed posture or form a parallelogram connection posture.

[0007] Preferably, the transverse tube is an upwardly arched arc structure, and the center lines of the first through hole and the second through hole both point to the center of the arc structure.

[0008] Preferably, the limiting assembly includes several groups of locking washers, which are respectively pressed against the inner wall of the horizontal tube and the outer wall of the vertical tube, and the locking contacts of the V-shaped spring buckle are embedded in the corresponding locking washers.

[0009] Preferably, the limiting assembly is composed of several groups of locking gaskets and a back plate, the back plate is glued to one side of the inner wall of the horizontal tube and synchronously abuts all vertical tubes, all the locking gaskets are distributed on the inner wall on the other side of the horizontal tube, and each locking gasket abuts the corresponding vertical tube, and the locking contacts of the V-shaped spring buckle are embedded in the back plate and the corresponding locking gasket.

[0010] Preferably, the insertion portion includes a third insertion hole and a fourth insertion hole correspondingly opened on both sides of the horizontal tube, a third pre-bent tongue is provided on both sides of the hole wall of the third insertion hole, and a mounting hole is provided on the third pre-bent tongue. The vertical tube passes through the third insertion hole and the fourth insertion hole to realize plug-in assembly, and the locking contact of the V-shaped spring buckle is embedded in the corresponding mounting hole.

[0011] Preferably, the limiting assembly includes two groups of nylon blocks, the two groups of the third pre-bent tongues are pressed against the vertical tube, the nylon blocks are abutted in the gap formed by the inner wall of the third pre-bent tongue and the inner wall of the horizontal tube, and the locking contacts are embedded in the nylon blocks.

[0012] Preferably, the limiting assembly includes two groups of plugs, the gap between the two groups of the third pre-bent tongues is slightly larger than the cross-sectional side length of the vertical tube, and the two groups of the plugs clamp the vertical tube to form a distributed support; the body of the plug is a rectangular seat, the thickness of the seat is adapted to the gap size between the outer wall of the vertical tube and the inner wall of the horizontal tube, a support portion is provided at one end of the seat, the thickness of the support portion is adapted to the gap size formed by the inner wall of the third pre-bent tongue and the outer wall of the vertical tube, and a U-shaped opening adapted to the locking contact is provided at the end of the support portion.

[0013] In another aspect, the present invention further provides a method for assembling a quick-assembly type guardrail, comprising the following steps: 1) According to the preset spacing of the vertical pipes, corresponding reserved holes are machined on the back plate. Use epoxy resin glue to pre-bond the back plate to one side of the horizontal pipe cavity to ensure that the back plate fits tightly to the inner wall of the horizontal pipe; 2) Based on the preset spacing of the vertical tubes, U-shaped grooves corresponding to the positions are machined on both sides of the horizontal tube. The reserved plate in the middle of the U-shaped groove is pressed down through a stamping process to bend it into the cavity of the horizontal tube to form a first pre-bent tongue or a second pre-bent tongue. The notch of the U-shaped groove naturally forms a first insertion hole or a second insertion hole; 3) During assembly, use a bending tool to adjust the bending angles of the first and second pre-bent tongues again to ensure that they can respectively abut or fit against the surface of the vertical tube, thereby achieving a vertical fixed posture or a parallelogram connection posture between the horizontal tube and the vertical tube; 4) Insert the first vertical pipe into the first and second insertion holes on both sides of the horizontal pipe, ensuring that the vertical pipe passes through both holes to form the initial positioning; 5) Use a spring clip installation tool to push the V-shaped spring clip into the inner cavity of the vertical tube along the axis of the vertical tube. Continue pushing it to the preset position, and release the V-shaped spring clip. The locking contacts at both ends of the V-shaped spring clip extend from the positioning holes of the vertical tube, and one of the locking contacts is embedded in the reserved hole of the back plate, completing the preliminary mechanical connection between the horizontal tube and the vertical tube. 6) Use a gasket installation tool to push the locking gasket axially into the vertical tube's inner cavity. During the pushing process, the guiding slope at its front end contacts another locking contact, forcing the locking contact to retract into the vertical tube's inner cavity. When the through hole of the locking gasket and the locking contact are coaxial, the V-shaped spring buckle recovers due to elastic deformation, pushing the locking contact into the through hole. At this time, the pressing contact portion of the locking gasket abuts against the outer wall of the vertical tube, forming a dual friction and interlocking constraint, thereby achieving a secure connection between the horizontal tube and the vertical tube. 7) Repeat steps 4 to 6 to complete the assembly of the remaining vertical pipes in sequence until all vertical pipes are assembled.

[0014] The two ends of the spring are respectively aligned with the two through slots, and a push-pull rod is fixed on one end of the U-shaped block, the push-pull rod passes through the guide slot and is sleeved on the inner cavity of the sleeve rod, and the end of the push-pull rod is provided with a movable pin extending from the oblong hole, and the push-pull rod sleeve is provided with a spring, and the two ends of the spring respectively abut against the U-shaped block and the end wall of the movable slot.

[0015] After adopting the above technical solution, the beneficial effects of the present invention are: The horizontal and vertical tubes are assembled using standardized prefabricated components through plug-in assembly, eliminating traditional welding processes, reducing transportation volume and weight, and making them suitable for remote construction scenarios. A V-shaped snap-fit ​​mechanism with positioning holes, combined with a pre-bent tab for automatic fit, allows for "plug-and-lock" installation of the horizontal and vertical tubes, significantly improving installation efficiency and allowing for partial replacement during maintenance without disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of an embodiment of a cross tube; Figure 3 This is a schematic diagram of the assembly of an embodiment of a cross tube; Figure 4 This is a schematic diagram of the assembly of the second embodiment of the cross tube; Figure 5 This is a schematic diagram of the installation of the V-shaped snap fastener; Figure 6 Schematic diagram of the structure of the locking gasket; Figure 7 The figure is a schematic diagram of the installation of the locking gasket; Figure 8 A schematic structural diagram of an embodiment of a backplane; Figure 9 Schematic diagram of the structure of the second embodiment of the backplane; Figure 10 Schematic diagram of the structure of the second embodiment of the cross tube; Figure 11 Schematic diagram of the structure of the third embodiment of the cross tube; Figure 12 This is a schematic diagram of the assembly of the third embodiment of the cross tube; Figure 13 Schematic diagram of the assembly of the plug; Figure 14 Schematic diagram of the structure of the plug; Figure 15 Schematic diagram of the structure of the protective cover; Figure 16 is a cross-sectional view of the protective cover; Figure 17 Schematic diagram of the assembly of the protective cover; Figure 18 This is a schematic diagram of the assembly of the fourth embodiment of the cross tube; Figure 19 Schematic diagram of the structure of the first limit card seat; Figure 20 This is a schematic diagram of the assembly of the fifth embodiment of the cross tube; Figure 21 Schematic diagram of the structure of the second limit card seat; Figure 22 It is a structural diagram of the spring card installation tool; Figure 23 Schematic diagram of the spring card installation tool.

[0018] In the figure: 1- horizontal tube, 11- first insertion hole, 111- first pre-bent tongue, 112- first hole wall, 12- second insertion hole, 121- second pre-bent tongue, 122- second hole wall, 13- third insertion hole, 131- third pre-bent tongue, 132- mounting hole, 133- nylon block, 14- fourth insertion hole, 15- fifth insertion hole, 16- sixth insertion hole, 17- plug, 171- seat, 172- support part, 1721- U-shaped mouth; 18- protective cover, 181- claw, 1811- limiting protrusion; 2- vertical tube, 21- positioning hole; 3- locking gasket, 31- through hole, 32- guide groove, 3 3-pressing part; 4-V-shaped spring buckle, 41-contact; 5-nylon plate, 51-first reserved hole; 6-flat iron, 61-limiting seat, 611-second reserved hole; 7-first limiting clamping seat, 71-first connecting ear, 711-first limiting hole; 8-second limiting clamping seat, 81-second connecting ear, 811-second limiting hole, 82-fourth pre-bent tongue; 9-spring clamp installation tool, 91-sleeve rod, 92-handle, 921-long round hole, 93-push-pull rod, 931-movable pin, 94-clamping seat, 941-movable groove, 942-through groove, 943-guide groove, 944-holding part, 95-U-shaped block, 96-spring. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

[0020] The directional words appearing in the following description refer to the directions shown in the drawings and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0021] Example 1 like Figure 1As shown, this embodiment provides a quick-assembly guardrail, including at least two horizontal tubes 1 arranged horizontally and at least two vertical tubes 2 arranged vertically. The vertical tubes 2 and the horizontal tubes 1 are both square tubes, and the horizontal tube 1 is connected to the vertical tube 2 by an insertion portion provided thereon.

[0022] like Figure 2 As shown, the insertion portion is integrally designed with the transverse tube 1. The insertion portion includes a first through-hole 11 and a second through-hole 12, correspondingly defined on either side of the transverse tube 1. The widths of the first and second through-holes 11, 12 match the cross-sectional length of the vertical tube 2, employing a clearance fit (tolerance ≤ 0.500mm) to ensure zero deflection during longitudinal insertion of the vertical tube 2. The lengths of the first and second through-holes 11, 12 are both greater than the cross-sectional length of the vertical tube 2, providing sufficient space for installation and adjustment.

[0023] A first pre-bent tongue 111 is provided on one side of the hole wall of the first insertion hole 11 , and a second pre-bent tongue 121 is provided on one side of the hole wall of the second insertion hole 12 . The second pre-bent tongue 121 is diagonally arranged to the first pre-bent tongue 111 .

[0024] The vertical tube 2 passes through the first insertion hole 11 and the second insertion hole 12 in sequence to achieve plug-in assembly. In the assembled state, the first pre-bent tongue 111 and the second pre-bent tongue 121 respectively abut or fit against the vertical tube 2, so that the horizontal tube 1 and the vertical tube 2 are in a vertical fixed posture or form a parallelogram connection posture.

[0025] like Figure 3 As shown, the end of the first pre-bent tongue 111 abuts against one side of the vertical tube 2, forcing the other side of the vertical tube 2 to cling to the first hole wall 112 of the first insertion hole 11. The end of the second pre-bent tongue 121 abuts against one side of the vertical tube 2, forcing the other side of the vertical tube 2 to cling to the second hole wall 122 of the second insertion hole 12.

[0026] The contact between the ends of the tabs and the walls of the holes on either side completely constrains the rotational freedom of the horizontal tube 1 about the vertical tube 2, ensuring that the horizontal tube 1 remains horizontal and perpendicular to the vertical tube 2, meeting the rigidity requirements of standard guardrails. The resulting bidirectional limiter structure constrains the horizontal tube 1 to remain horizontal, ensuring that the horizontal tube 1 and the vertical tube 2 are fixed in a vertical position.

[0027] like Figure 4 As shown, the first pre-bent tab 111 fits on one side of the vertical tube 2, while the second pre-bent tab 121 fits on the other side, constraining the horizontal tube 1 to maintain its tilt. By adjusting the bending angle of the tabs, they flexibly fit against both sides of the vertical tube 2, allowing the horizontal tube 1 to tilt about the vertical tube 2, forming a parallelogram structure. This design allows for quick adjustment of the guardrail angle (for example, to adapt to a ramp), without requiring disassembly or reassembly, significantly improving construction efficiency.

[0028] The same through-hole structure is compatible with two tongue working modes (resting / fitting). Function switching can be achieved by simply adjusting the pre-bending angle of the tongue, reducing mold development costs and improving the guardrail's adaptability to scenarios such as slopes and irregular terrain.

[0029] like Figure 5 As shown, a V-shaped snap lock 4 is embedded within the vertical tube 2. It is stamped from high-strength spring steel and has excellent deformation recovery. Cylindrical locking contacts 41 are symmetrically positioned at each end of the V-shaped snap lock 4, with the ends featuring a circular arc transition design to reduce assembly resistance. Positioning holes 21 are provided on either side of the vertical tube 2. The locking contacts 41 extend from the corresponding positioning holes 21 and mechanically interlock with the stopper assembly within the horizontal tube 1, achieving a secure connection between the horizontal tube 1 and the vertical tube 2.

[0030] like Figure 6 and Figure 7 As shown, the limiting assembly includes several locking washers 3, which respectively abut against the gap formed by the inner wall of the horizontal tube 1 and the outer wall of the vertical tube 2, that is, a locking washer 3 is symmetrically arranged on both sides of each vertical tube 2.

[0031] The locking washer 3 defines a through-hole 31, the diameter of which matches the size of the locking contact 41. One end of the locking washer 3 is provided with a guide slope, which includes a guide groove 32 extending along the slope. This guide groove 32 communicates with the through-hole 31 and guides the locking contact 41 into the through-hole 31. The width of the locking washer 3 matches the width of the inner cavity of the cross tube 1, with a 0.2-0.5mm adjustment margin reserved on each side to accommodate deformation caused by thermal expansion and contraction.

[0032] The end surface of the locking washer 3 is flat, ensuring full surface contact with the riser 2. However, due to the low coefficient of friction, microslipping can occur under high-frequency vibrations, leading to loosening of the locking contact 41. To address this, the end surface of the locking washer 3 is provided with multiple protruding pressure contact portions 33 to prevent localized stress concentration. When the pressure contact portions 33 contact the sidewall of the riser 2, distributed compressive stress is generated, increasing friction and effectively suppressing vibration displacement.

[0033] When the locking washer 3 is inserted, the guiding slope contacts the locking contact 41, forcing it to retract. The V-shaped spring catch 4 generates elastic deformation and stores energy. When the through hole 31 of the locking washer 3 and the locking contact 41 become coaxial, the V-shaped spring catch 4 releases its deformation, pushing the locking contact 41 into the through hole 31. At this point, the pressing portion 33 abuts against the outer wall of the riser 2, creating a dual friction-fitting constraint.

[0034] During installation, the guiding slope of locking washer 3 contacts locking contact 41, forcing it to retract and simultaneously causing V-shaped snap lock 4 to elastically deform and store energy. When through-hole 31 and locking contact 41 are coaxially aligned, V-shaped snap lock 4 releases its deformation, driving locking contact 41 into through-hole 31. At this point, the pressing contact portion 33 fully abuts against the outer wall of riser 2, forming a dual fixing mechanism of frictional restraint and interlocking locking.

[0035] Example 2 In order to solve the problems in Example 1 that too many locking washers 3 are used (each vertical pipe 2 requires two locking washers 3 to support it) and the installation is complicated, this embodiment proposes an optimization solution.

[0036] like Figure 8 and Figure 9 As shown, the limiting assembly consists of several sets of locking washers 3 and a backing plate. The backing plate is pre-glued to the inner wall of one side of the transverse tube 1, forming a continuous support surface that allows for simultaneous contact with all vertical tubes 2. All locking washers 3 are distributed on the inner wall of the other side of the transverse tube 1, and each locking washer 3 contacts the corresponding vertical tube 2, forming a bidirectional clamping structure with the backing plate. The locking contacts 41 of the V-shaped spring catch 4 are simultaneously embedded in the reserved holes of the backing plate and the through holes 31 of the locking washers 3, creating a dual constraint of mechanical interlocking and friction damping, effectively suppressing displacement and vibration.

[0037] Compared with Example 1, the amount of locking gasket 3 in this embodiment is reduced by 50% (single-side arrangement), and the assembly time is shortened to 60% of the original solution.

[0038] The width of the back plate matches the inner size of the horizontal tube 1 to avoid the jump of the vertical tube 2 after interlocking. The back plate can be in the form of nylon plate 5 or flat iron 6.

[0039] The nylon plate 5 has high wear resistance and deformation resistance, and can effectively absorb vibration. The thickness of the nylon plate 5 is adapted to the gap size formed by the inner wall of the horizontal tube 1 and the outer wall of the vertical tube 2. The plate body is provided with a first reserved hole 51 corresponding to the position of the positioning hole 21.

[0040] The flat iron 6 provides excellent rigid support and optimizes load distribution. It is equipped with multiple stoppers 61, each corresponding to one of the vertical tubes 2. These stoppers 61 rest between the inner wall of the horizontal tube 1 and the outer wall of the vertical tube 2. Each stopper 61 is provided with a second reserved hole 611 corresponding to the positioning hole 21.

[0041] Example 3 like Figure 10 As shown, the transverse tube 1 can also be bent to form an arc-shaped structure that arches upward (when installed), and the center lines of the first through hole 11 and the second through hole 12 both point to the center of the arc-shaped structure.

[0042] When the latch of the conventional linear cross tube 1 fails, the cross tube 1 will slide freely down along the vertical tube 2 under the action of gravity, resulting in the loss of the guardrail function.

[0043] When the horizontal tube 1 is curved, the walls of the first and second through-holes 11, 12 form an inclination angle with the vertical tube 2. This decomposes the normal force on the contact surface into a vertical component and a horizontal component. The horizontal component indirectly increases the maximum static friction by increasing the effective compressive stress on the contact surface, thus resisting the downward trend. The curved structure also evenly distributes the load along the curvature, increasing the number of contact points (compared to linear single-point contact), and avoiding localized stress concentration.

[0044] After optimization in this embodiment, compared with the straight cross tube 1, the arc-shaped structure significantly improves the anti-slip reliability and effectively reduces the risk of guardrail failure through the dual mechanisms of increasing resistance of the horizontal component of normal force and balancing loads at multiple contact points.

[0045] Example 4 like Figure 11 and Figure 12 As shown, the insertion portion and the cross tube 1 are integrally formed. The insertion portion includes a third insertion hole 13 and a fourth insertion hole 14 correspondingly provided on either side of the cross tube 1. Third pre-bent latches 131 are provided on either side of the wall of the third insertion hole 13, and each third pre-bent latch 131 is provided with a mounting hole 132.

[0046] Standpipe 2 is inserted through third and fourth insertion holes 13 and 14 for connection. Once assembled, the two sets of third pre-bent tabs 131 press tightly against the sidewalls of standpipe 2, creating a continuous compressive force and frictional resistance due to elastic deformation. Simultaneously, the locking contacts 41 of the V-shaped snap fasteners 4 engage with the corresponding mounting holes 132, creating a mechanical interlock.

[0047] After long-term use, the third pre-bent tongue 131 may lose its resilience due to metal fatigue, thereby weakening the restraint on the vertical tube 2 and causing the vertical tube 2 to deflect.

[0048] To maintain the squeezing effect, a nylon block 133 is glued to the back of the third pre-bent tab 131 (the side facing the interior of the cross tube 1), and the locking contact 41 is embedded in the corresponding nylon block 133. The high elastic modulus and creep resistance of nylon material compensate for stress relaxation, ensuring that the third pre-bent tab 131 maintains constant pressure on the riser 2.

[0049] Example 5 In Example 4, when the vertical pipe 2 is inserted, the third pre-bent tongues 131 on both sides need to be forcibly squeezed open, resulting in severe friction between the edges of the tongues and the surface of the vertical pipe 2, which may scratch the galvanized layer or the sprayed layer.

[0050] like Figure 13 and Figure 14As shown, in this embodiment, the nylon block 133 is replaced with a plug 17. The main body of plug 17 is a rectangular base 171, whose thickness matches the gap between the outer wall of vertical tube 2 and the inner wall of horizontal tube 1. A support portion 172 extends from one end of base 171. A U-shaped opening 1721 is formed at the end of support 172 to accommodate locking contact 41. The thickness of support 172 matches the gap between the inner wall of third pre-bent latch 131 and the outer wall of vertical tube 2.

[0051] The gap between the two sets of third pre-bent tongues 131 is slightly larger than the cross-sectional side length of the vertical tube 2, so the vertical tube 2 does not need to be forcibly squeezed open by the tongues during insertion. The vertical tube 2 is clamped by the plugs 17 on both sides, forming a distributed support, and simultaneously solving the problems of friction damage and preload attenuation.

[0052] Example 6 like Figures 15 to 17 As shown, a protective cover 18 is additionally provided on the basis of Example 5. A claw 181 is provided on each side of the lower end surface of the protective cover 18, which is inclined toward its central axis. A limiting protrusion 1811 is provided on the outer side of the claw 181. The gap between the limiting protrusion 1811 and the protective cover 18 body matches the wall thickness of the transverse tube 1.

[0053] During assembly, adjust the fourth insertion hole 14 of the horizontal tube 1 to face upward, and press the protective cover 18 vertically into the fourth insertion hole 14. When the vertical tube 2 is inserted, its sidewalls compress the claws 181 on both sides, forcing them to elastically expand outward until the stop protrusions 1811 abut the inner wall of the horizontal tube 1, achieving a self-locking fixation. Simultaneously, the elastic deformation of the claws 181 provides continuous pressure, preventing vibration and dislodging.

[0054] The protective cover 18 is tightly fitted on the vertical pipe 2, completely covering the gap between the fourth insertion holes 14, preventing dust, rainwater and other debris from entering the inner cavity of the horizontal pipe 1, and protecting the structure from corrosion.

[0055] Example 7 like Figure 18 and Figure 19 As shown, the insertion portion includes two sets of split-type first limit clamps 7, which are symmetrically sleeved on the outer side of the vertical tube 2. Both sides of the first limit clamps 7 are provided with first connecting ears 71, and the first connecting ears 71 are provided with first limit holes 711.

[0056] Fifth insertion holes 15 are correspondingly opened on both sides of the horizontal tube 1, the first limit holder 7 is embedded in the corresponding fifth insertion holes 15, and the vertical tube 2 passes through the two groups of fifth insertion holes 15 to achieve plug-in assembly.

[0057] The inner diameter of the first stopper 7 matches the outer diameter of the vertical tube 2, while the outer edge of the first stopper 7 matches the diameter of the fifth through-hole 15. This design allows the first stopper 7 to fit tightly onto the vertical tube 2 while completely covering the gap in the fifth through-hole 15, effectively preventing dust, rainwater, and other debris from entering the inner cavity of the horizontal tube 1.

[0058] Two sets of V-shaped spring latches 4 are inserted into the interior of the vertical tube 2. When assembled, the locking contacts 41 of the V-shaped spring latches 4 engage with corresponding first stop holes 711. The two sets of first stop retainers 7 are secured to the vertical tube 2 via the locking contacts 41, creating a double-sided clamping force on the horizontal tube 1, eliminating the need for additional stop components as in Example 1.

[0059] Example 8 like Figure 20 and Figure 21 As shown, the insertion portion includes two sets of split-type second limiter holders 8, which are sleeved onto the outside of the vertical tube 2. Second connection ears 81 are provided on both sides of the second limiter holders 8, each of which has a second limiter hole 811 formed therein. A fourth pre-bent tongue 82 is provided at one end of the second limiter holder 8, with the fourth pre-bent tongues 82 of the two sets of second limiter holders 8 arranged diagonally opposite each other.

[0060] Sixth insertion holes 16 are correspondingly opened on both sides of the horizontal tube 1, the second limit holder 8 is embedded in the corresponding sixth insertion holes 16, and the vertical tube 2 passes through the two groups of sixth insertion holes 16 to achieve plug-in assembly.

[0061] In the assembled state, the locking contacts 41 of the V-shaped spring catches 4 engage with the corresponding second limiting holes 811. The two sets of second limiting retainers 8 are fixed to the vertical tube 2 via the locking contacts 41, forming a double-sided clamping force on the horizontal tube 1, achieving a secure connection between the horizontal tube 1 and the vertical tube 2, without the need for additional limiting components as in Example 1.

[0062] Similar to the structural conversion of Example 1, the fourth pre-bent tongues 82 of the two groups of second limiting sockets 8 respectively abut or fit against the vertical pipe 2, so that the horizontal pipe 1 and the vertical pipe 2 are in a vertical fixed posture or form a parallelogram connection posture, thereby improving the adaptability of the guardrail to scenes such as ramps and irregular terrain.

[0063] Based on the technical solutions of Example 1 and Example 2, the assembly method of the quick-assembly guardrail includes the following steps: 1) Based on the preset spacing between vertical tubes 2, machine corresponding reserved holes (first reserved hole 51 / second reserved hole 611) on the back plate (nylon plate 5 / flat iron 6). Use epoxy resin glue to pre-bond the back plate to the inner wall of one side of the horizontal tube 1. The glue layer thickness should be ≤ 0.2mm to ensure that the back plate fits tightly to the inner wall of the horizontal tube 1. 2) According to the spacing between the vertical tubes 2, U-shaped grooves are machined on both sides of the horizontal tube 1 at corresponding positions. The reserved plate in the middle of the U-shaped groove is pressed down through a stamping process to bend it into the cavity of the horizontal tube 1 to form a tongue (first pre-bent tongue 111 / second pre-bent tongue 121). The opening of the U-shaped groove naturally forms a through hole (first through hole 11 / second through hole 12). The hole opening needs to be rounded and deburred. 3) During assembly, the bending angles of the first pre-bent tongue 111 and the second pre-bent tongue 121 are adjusted again using a bending tool to ensure that they can respectively abut or fit against the surface of the vertical tube 2, thereby achieving a vertical fixed posture or a parallelogram connection posture of the horizontal tube 1 and the vertical tube 2; 4) Insert the first vertical tube 2 into the first insertion hole 11 and the second insertion hole 12 on both sides of the horizontal tube 1, ensuring that the vertical tube 2 passes through both holes to form the initial positioning; 5) Use the spring clip installation tool 9 to push the V-shaped spring latch 4 axially into the inner cavity of the vertical tube 2. Continue pushing until it reaches the preset position. Release the V-shaped spring latch 4. The locking contacts 41 at both ends of the V-shaped spring latch 4 extend from the positioning holes 21 of the vertical tube 2. One of the locking contacts 41 is embedded in the reserved hole in the back plate, completing the preliminary mechanical connection between the horizontal tube 1 and the vertical tube 2. 6) Use a gasket installation tool to push the locking gasket 3 axially into the inner cavity of the vertical tube 2. During the pushing process, the guiding slope at the front end of the locking gasket 3 contacts the other locking contact 41, forcing the locking contact 41 to retract into the inner cavity of the vertical tube 2. When the through hole 31 of the locking gasket 3 and the locking contact 41 are coaxial, the V-shaped spring catch 4 recovers due to elastic deformation, pushing the locking contact 41 into the through hole 31. At this time, the pressing contact portion 33 of the locking gasket 3 abuts against the outer wall of the vertical tube 2, forming a dual friction and interlocking constraint, thereby achieving a secure connection between the horizontal tube 1 and the vertical tube 2. 7) Repeat steps 4 to 6 to complete the assembly of the remaining vertical pipes 2 in sequence until all vertical pipes 2 are assembled.

[0064] like Figure 22 and Figure 23 As shown, the spring clamp installation tool 9 includes a base body and a U-shaped block 95. A sleeve rod 91 is fixed to one end of the base body, and a handle 92 is connected to the end of the sleeve rod 91. The handle body of the handle 92 is provided with an oblong hole 921 connected to its inner cavity. The base body is formed by two groups of symmetrically arranged clamping bases 94 fixed by bolts. A movable groove 941 is provided on one side of the clamping base 94, and a guide groove 943 connected to the movable groove 941 is provided at one end of the clamping base 94, and two through grooves 942 connected to the movable groove 941 are provided at the other end of the clamping base 94. A retaining portion 944 is provided at the end of the through groove 942 away from the sleeve rod 91, and the two through grooves 942 are distributed on both sides of the retaining portion 944. The U-shaped block 95 is embedded in the movable groove 941, and the two ends of the U-shaped block 95 are respectively aligned with the two through grooves 942.

[0065] A push-pull rod 93 is fixed to one end of the U-shaped block 95. The push-pull rod 93 passes through the guide groove 943 and is sleeved in the inner cavity of the sleeve rod 91. The end of the push-pull rod 93 is provided with a movable pin 931 extending from the oblong hole 921. The push-pull rod 93 is sleeved with a spring 96. The two ends of the spring 96 respectively abut against the U-shaped block 95 and the end wall of the movable groove 941.

[0066] Under the preload of spring 96, the two ends of U-shaped block 95 extend outward from corresponding slots 942, forming a clamping portion. Manually squeezing V-shaped snap 4 causes it to elastically deform and then be restrained in the clamping portion. Retaining portion 944 limits the deflection of V-shaped snap 4, preventing it from falling off.

[0067] Holding handle 92, extend the base holding the V-shaped snap 4 into the interior of horizontal tube 1 to the preset position. Pulling pin 931 with your finger, push-pull rod 93 moves U-shaped block 95 backward along movable slot 941. V-shaped snap 4 releases its restraints, and its locking contact 41 pops out of the positioning hole 21 of vertical tube 2. As the base is withdrawn, return spring 96 pushes the end of U-shaped block 95 back into place, ready to clamp the next V-shaped snap 4.

[0068] While the embodiments of the present invention are described above, these embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to make good use of the present invention and its modifications and uses. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A quick-assembly guardrail comprising at least two horizontal tubes (1) arranged transversely and at least two vertical tubes (2) arranged vertically; characterized in that: The horizontal tube (1) is plug-connected with the vertical tube (2) through the plug-in portion provided thereon, so that the horizontal tube (1) and the vertical tube (2) are in a vertical fixed posture or form a parallelogram connection posture, and the plug-in portion and the horizontal tube (1) are of an integrated or split design; a limiting component is installed inside the horizontal tube (1), and a V-shaped spring buckle (4) is inserted inside the vertical tube (2), and locking contacts (41) are provided at both ends of the V-shaped spring buckle (4), and positioning holes (21) are correspondingly opened on both sides of the vertical tube (2), and the locking contacts (41) extend from the corresponding positioning holes (21) and form a snap fit with the limiting component to achieve a firm connection between the horizontal tube (1) and the vertical tube (2).

2. The quick-assembly guardrail according to claim 1, characterized in that: The insertion portion comprises a first insertion hole (11) and a second insertion hole (12) correspondingly opened on both sides of the horizontal tube (1); a first pre-bent latch (111) is provided on one side of the hole wall of the first insertion hole (11); a second pre-bent latch (121) is provided on one side of the hole wall of the second insertion hole (12); the second pre-bent latch (121) and the first pre-bent latch (111) are arranged diagonally opposite each other; the vertical tube (2) passes through the first insertion hole (14) and the second insertion hole (16) to achieve plug-in assembly; in the assembled state, the first pre-bent latch (111) and the second pre-bent latch (121) respectively abut against the vertical tube (2) or fit against the vertical tube (2), so that the horizontal tube (1) and the vertical tube (2) are in a vertical fixed posture or form a parallelogram connection posture.

3. The quick-assembly guardrail according to claim 2, characterized in that: The transverse tube (1) is an upwardly arched arc structure, and the center lines of the first through hole (11) and the second through hole (12) both point to the center of the arc structure.

4. The quick-assembly guardrail according to claim 2, characterized in that: The limiting assembly includes a plurality of groups of locking washers (3), each of which is respectively pressed against the inner wall of the horizontal tube (1) and the outer wall of the vertical tube (2), and the locking contacts (41) of the V-shaped spring buckle (4) are embedded in the corresponding locking washers (3).

5. The quick-assembly guardrail according to claim 2, characterized in that: The limiting assembly comprises a plurality of groups of locking washers (3) and a back plate, wherein the back plate is glued to one side of the inner wall of the transverse tube (1) and is synchronously pressed against all the vertical tubes (2), and all the locking washers (3) are distributed on the inner wall of the other side of the transverse tube (1), and each locking washers (3) is pressed against the corresponding vertical tube (2), and the locking contacts (41) of the V-shaped spring buckles (4) are embedded in the back plate and the corresponding locking washers (3).

6. The quick-assembly guardrail according to claim 1, characterized in that: The plug-in portion comprises a third insertion hole (13) and a fourth insertion hole (14) correspondingly opened on both sides of the horizontal tube (1); a third pre-bent tongue (131) is provided on both sides of the hole wall of the third insertion hole (13); a mounting hole (132) is provided on the third pre-bent tongue (131); the vertical tube (2) passes through the third insertion hole (13) and the fourth insertion hole (14) to achieve plug-in assembly; the locking contact (41) of the V-shaped spring buckle (4) is embedded in the corresponding mounting hole (132).

7. The quick-assembly guardrail according to claim 6, characterized in that: The limiting assembly comprises two groups of nylon blocks (133), the two groups of the third pre-bent tongues (131) are pressed against the vertical tube (2), the nylon blocks (133) are abutted in the gap formed by the inner wall of the third pre-bent tongues (131) and the inner wall of the horizontal tube (1), and the locking contact (41) is embedded in the nylon blocks (133).

8. The quick-assembly guardrail according to claim 6, characterized in that: The limiting assembly comprises two groups of plugs (17), the gap between the two groups of the third pre-bent tongues (131) is slightly larger than the cross-sectional side length of the vertical tube (2), and the two groups of the plugs (17) clamp the vertical tube (2) to form a distributed support; the body of the plug (17) is a rectangular seat (171), the thickness of the seat (171) is adapted to the gap size between the outer wall of the vertical tube (2) and the inner wall of the horizontal tube (1), one end of the seat (171) is provided with a support portion (172), the thickness of the support portion (172) is adapted to the gap size formed by the inner wall of the third pre-bent tongue (131) and the outer wall of the vertical tube (2), and the end of the support portion (172) is provided with a U-shaped opening (1721) adapted to the locking contact (41).

9. A method for assembling a quick-assembly type guardrail according to claim 5, characterized in that: The steps include: 1) According to the preset spacing of the vertical tubes (2), corresponding reserved holes are machined on the back plate, and the back plate is pre-bonded to one side of the inner cavity of the horizontal tube (1) using epoxy resin glue to ensure that the back plate fits tightly to the inner wall of the horizontal tube (1); 2) According to the preset spacing of the vertical tube (2), U-shaped grooves corresponding to the positions are respectively processed on both sides of the horizontal tube (1), and the reserved plate in the middle of the U-shaped groove is pressed down by a stamping process so that it is bent into the cavity of the horizontal tube (1) to form a first pre-bent tongue (111) or a second pre-bent tongue (121), and the notch of the U-shaped groove naturally forms a first insertion hole (11) or a second insertion hole (12); 3) During assembly, the bending angles of the first pre-bent tongue (111) and the second pre-bent tongue (121) are adjusted again by a bending tool to ensure that they can respectively abut or fit against the surface of the vertical tube (2), thereby achieving a vertical fixed posture or a parallelogram connection posture of the horizontal tube (1) and the vertical tube (2); 4) Insert the first vertical tube (2) into the first insertion hole (11) and the second insertion hole (12) on both sides of the horizontal tube, ensuring that the vertical tube passes through the two holes to form an initial positioning; 5) Use a spring clip installation tool (9) to push the V-shaped spring buckle (4) into the inner cavity of the vertical tube (2) along the axial direction, and continue to push it to the preset position, release the V-shaped spring buckle (4), and the locking contacts (41) at both ends of the V-shaped spring buckle (4) extend from the positioning holes (21) of the vertical tube (2), and one of the locking contacts (41) is embedded in the reserved hole of the back plate, completing the preliminary mechanical connection between the horizontal tube (1) and the vertical tube (2); 6) Use a gasket installation tool to push the locking gasket (3) axially into the inner cavity of the vertical tube (2). During the pushing process of the locking gasket (3), the guiding inclined surface at the front end contacts the other locking contact (41), forcing the locking contact (41) to retract into the inner cavity of the vertical tube (2). When the through hole (31) of the locking gasket (3) and the locking contact (41) are coaxial, the V-shaped spring buckle (4) recovers due to elastic deformation, pushing the above-mentioned locking contact (41) to embed into the through hole (31). At this time, the pressing part (33) of the locking gasket (3) is pressed against the outer wall of the vertical tube (2), forming a friction-engagement dual constraint, thereby realizing a firm connection between the horizontal tube (1) and the vertical tube (2); 7) Repeat steps 4 to 6 to complete the assembly of the remaining vertical pipes (2) in sequence until all vertical pipes (2) are assembled.

10. The method for assembling a rapid assembly type guardrail according to claim 9, characterized in that: The spring clamp installation tool (9) includes a base body and a U-shaped block (95), a sleeve rod (91) is fixed at one end of the base body, the end of the sleeve rod (91) is connected to a handle (92), the handle body of the handle (92) is provided with an oblong hole (921) connected to its inner cavity, the base body is formed by two groups of symmetrically arranged clamping bases (94) fastened together, a movable groove (941) is provided on one side of the clamping base (94), a guide groove (943) connected to the movable groove (941) is provided at one end of the clamping base (94), and two through grooves (942) connected to the movable groove (941) are provided at the other end of the clamping base (94), and the through grooves (942) are away from one side of the sleeve rod (91). A retaining portion (944) is provided at the end, and the two through grooves (942) are distributed on both sides of the retaining portion (944). The U-shaped block (95) is embedded in the movable groove (941), and the two ends of the U-shaped block (95) are respectively aligned with the two through grooves (942). A push-pull rod (93) is fixed to one end of the U-shaped block (95), and the push-pull rod (93) passes through the guide groove (943) and is sleeved in the inner cavity of the sleeve rod (91). The end of the push-pull rod (93) is provided with a movable pin (931) extending from the oblong hole (921), and the push-pull rod (93) is sleeved with a spring (96), and the two ends of the spring (96) respectively abut against the end wall of the U-shaped block (95) and the movable groove (941).

Images