Temporary protective fence for urban overpass construction and use method thereof

Abstract

The application provides a temporary protective fence for urban overpass construction and a use method. The protective fence comprises a base and a protective crossbeam. The protective crossbeam is movably connected with the base through a scissor link. The base is provided with a first receiving groove for accommodating the protective crossbeam. The first receiving groove and the opposite end surface of the protective crossbeam are respectively provided with a second receiving groove and a third receiving groove. The second receiving groove and the third receiving groove are opposite to each other to accommodate the scissor link in a folded state. The top end of the protective crossbeam is provided with a link limiting piece for fixing the scissor link in an unfolded state. Along the length direction of the temporary protective fence, the first side end of the base and the protective crossbeam is respectively provided with a clamping groove. The openings of the two groups of clamping grooves are opposite to each other. The second side end of the base and the protective crossbeam is respectively provided with a clamping block. The clamping block is matched with the clamping groove. The device can greatly shorten the assembly and disassembly time and can flexibly adapt to the corner or curve isolation requirements of the construction area.

Description

Technical Field

[0001] This invention relates to the field of construction protection technology, and in particular to a temporary protective barrier for urban overpass construction and its usage method. Background Technology

[0002] During the construction of urban overpasses, temporary guardrails are typically used for isolation and protection. Most common temporary guardrails on the market are modular structures, mainly composed of a base, uprights, and crossbars, usually connected by direct plugging or bolting. However, these guardrails present several problems in actual use. While direct plugging eliminates the need for tools during assembly, the connection stability is poor; it easily detaches and falls apart under stress along the insertion direction. Bolting, while ensuring stability, requires individual bolting at each connection point, often resulting in numerous bolts needed for assembling a single guardrail, making assembly and disassembly time-consuming and inefficient. Furthermore, the connection between guardrails typically uses bolts or pins, which not only prevents adjustment of the isolation angle as needed but also makes operation cumbersome, and bolts are easily lost after removal. Summary of the Invention

[0003] The purpose of this invention is to provide a temporary guardrail for urban overpass construction and its usage method, thereby addressing the shortcomings in the aforementioned background technology.

[0004] The technical solution of the present invention is as follows: a temporary guardrail for urban overpass construction, comprising a base and a protective beam, the protective beam being located above the base and movably connected to the base via a scissor-type connecting rod; the base is provided with a first storage groove for accommodating the protective beam, and the opposite end faces of the first storage groove and the protective beam are respectively provided with a second storage groove and a third storage groove; the bottom end of the scissor-type connecting rod is located in the second storage groove, and the top end is located in the third storage groove, the second storage groove and the third storage groove being aligned to accommodate the scissor-type connecting rod in a retracted state; the top end of the protective beam is provided with a connecting rod limiting member, the connecting rod limiting member being used to fix the scissor-type connecting rod in an extended state; along the length direction of the temporary guardrail, the first side end of the base and the first side end of the protective beam are respectively provided with snap-fit ​​grooves, the openings of the two sets of snap-fit ​​grooves being opposite each other, the second side end of the base and the second side end of the protective beam are respectively provided with snap-fit ​​blocks, the snap-fit ​​blocks being adapted to the shape of the snap-fit ​​grooves.

[0005] Preferably, the bottom surface of the second storage slot is provided with a first sliding groove, and the top surface of the third storage slot is provided with a second sliding groove; the bottom end of the scissor-type connecting rod is rotatably connected to a first slider located in the first sliding groove, and the top end is rotatably connected to a second slider located in the second sliding groove. The first slider can slide in the first sliding groove along the length direction of the temporary guardrail, and the second slider can slide in the second sliding groove along the length direction of the temporary guardrail.

[0006] Preferably, the linkage limiting component includes a linkage plate, a wing bolt, and a positioning pin. The linkage plate is located above the protective crossbeam, and the wing bolt passes through and is threaded onto the linkage plate and the protective crossbeam in sequence. The positioning pin is located at the bottom of the linkage plate and passes through and is pinned onto the protective crossbeam and the second slider in sequence.

[0007] Preferably, the top of the protective beam is provided with a fourth storage groove, and the bottom surface of the linkage plate and the fourth storage groove are respectively provided with hanging rings, and the two sets of hanging rings are connected by a traction rope.

[0008] Preferably, an auxiliary support plate is provided between the base and the protective beam. The bottom end of the auxiliary support plate is rotatably connected to the base, and the top end is rotatably connected to a third slider. The third slider is located in a third groove on the protective beam and can slide along the length of the temporary guardrail in the third groove.

[0009] Preferably, the inner wall of the first storage groove is provided with a first mounting shaft that is rotatably connected to the auxiliary support plate; the protective crossbeam is provided with a fifth storage groove, the fifth storage groove is provided with a second mounting shaft that is rotatably connected to the auxiliary support plate, the third slide groove communicates with the fifth storage groove, and the second mounting shaft is fixedly connected to the third slider.

[0010] Preferably, along the length of the temporary guardrail, the first side end of the base and the first side end of the protective beam are respectively rotatably connected to a first mounting block, the rotation axis of the first mounting block extends along the height direction of the temporary guardrail, and the snap-fit ​​groove is provided on the first mounting block.

[0011] Preferably, along the length of the temporary guardrail, the second side end of the base and the second side end of the protective beam are respectively rotatably connected to a second mounting block, the rotation axis of the second mounting block extends along the height direction of the temporary guardrail, and the snap-fit ​​block is provided on the second mounting block.

[0012] Preferably, the snap-fit ​​block includes a first snap-fit ​​part and a second snap-fit ​​part, and the snap-fit ​​groove includes a first groove segment and a second groove segment. The first groove segment corresponds to and snaps into the first snap-fit ​​part, and the second groove segment corresponds to and snaps into the second snap-fit ​​part. Along the width direction of the temporary guardrail, the second snap-fit ​​part is provided on both sides of the first snap-fit ​​part.

[0013] The technical solution of the present invention also includes: a method for using the above-mentioned temporary guardrails for urban overpass construction, which includes the following steps:

[0014] Pull the protective beam vertically to rotate the scissor link to its extended limit position, and lock the scissor link using the link limiter.

[0015] Place another set of temporary guardrails in the retracted state to the side of the extended temporary guardrails, so that the snap-fit ​​blocks on the base of the retracted temporary guardrails are inserted into the snap-fit ​​slots on the base of the extended temporary guardrails.

[0016] Pull the protective beam in the retracted temporary guardrail vertically so that the locking block on the protective beam in the retracted temporary guardrail is inserted into the locking groove of the protective beam in the unfolded temporary guardrail, and lock the scissor linkage using the connecting rod limiting component.

[0017] The beneficial effects of this invention include: the entire temporary guardrail's base, protective beams, scissor-type connecting rods, and connecting rod limiting components are always in a connected, integrated state, eliminating the need for individual insertion of uprights, crossbars, or multiple bolts as required by existing technologies, thus completely avoiding the problems of repeated disassembly and loss of scattered bolts. Height can be directly adjusted by unfolding and retracting the scissor-type connecting rods, without the need for tools, significantly shortening assembly and disassembly time. When connecting adjacent guardrails, simply insert the retracted second set of guardrails into the fixed first set, then unfold and lock it; no bolts or pins are needed at each connection point, and the design of the locking groove and locking block effectively prevents detachment under stress. Simultaneously, the rotatable first and second mounting blocks, in conjunction with the positioning bolts, can flexibly adapt to the corner or curve isolation requirements of the construction area while reliably locking the adjusted angle, preventing angle changes due to accidental collisions. Attached Figure Description

[0018] Figure 1 This is a diagram showing the collapsed state according to an embodiment of the present invention;

[0019] Figure 2 This is an unfolded state diagram of an embodiment of the present invention;

[0020] Figure 3 This is a longitudinal sectional view of an embodiment of the present invention;

[0021] Figure 4This is an appendix to the embodiments of the present invention. Figure 3 Enlarged view of the structure at point A in the middle;

[0022] Figure 5 This is an appendix to the embodiments of the present invention. Figure 3 Enlarged view of the structure at point B;

[0023] Figure 6 This is a top view of the base in an embodiment of the present invention;

[0024] Figure 7 This is a bottom view of the protective beam in an embodiment of the present invention.

[0025] In the picture:

[0026] 1. Base; 1.1. First storage slot; 1.2. Second storage slot; 1.3. First sliding groove;

[0027] 2. Protective crossbeam; 2.1. Third storage slot; 2.2. Fourth storage slot; 2.3. Fifth storage slot; 2.4. Second slide rail; 2.5. Third slide rail;

[0028] 3. Scissor linkage; 3.1 First linkage; 3.2 Second linkage;

[0029] 4. Linkage limit components; 4.1. Linkage plate; 4.2. Wing bolt; 4.3. Locating pin;

[0030] 5. First slider;

[0031] 6. Second slider;

[0032] 7. The third slider;

[0033] 8. Auxiliary support plate;

[0034] 9. First mounting shaft;

[0035] 10. Second mounting shaft;

[0036] 11. First mounting block;

[0037] 12. Second mounting block;

[0038] 13. Snap-fit ​​slot; 13.1. First slot section; 13.2. Second slot section;

[0039] 14. Snap-fit ​​block; 14.1. First snap-fit ​​part; 14.2. Second snap-fit ​​part;

[0040] 15. Locating bolts;

[0041] 16. Hanging ring;

[0042] 17. Towing rope. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] In the description of the embodiments of this invention, it should be understood that the terms "top," "bottom," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0045] Reference Appendix Figure 1-7 This invention provides a temporary protective barrier for urban overpass construction, comprising a base 1, a protective beam 2, a scissor-type connecting rod 3, and a connecting rod limiting member 4. Along the height direction of the temporary protective barrier, from top to bottom, the protective beam 2, the scissor-type connecting rod 3, and the base 1 are connected sequentially. The front view projection of the scissor-type connecting rod 3 is X-shaped, that is: the scissor-type connecting rod 3 includes a first connecting rod 3.1 and a second connecting rod 3.2 rotatably connected in the middle; the top end of the scissor-type connecting rod 3 is movably connected to the protective beam 2, that is: the top end of the first connecting rod 3.1 and the top end of the second connecting rod 3.2 are respectively movably connected to the protective beam 2; the bottom end of the scissor-type connecting rod 3 is movably connected to the base 1, that is: the bottom end of the first connecting rod 3.1 and the bottom end of the second connecting rod 3.2 are respectively movably connected to the base 1. When the first link 3.1 and the second link 3.2 rotate around their rotating connection point, their vertical tilt angles change. When the vertical tilt angles decrease, the first link 3.1 and the second link 3.2 tend to be more vertical, increasing the distance between the protective beam 2 and the base 1, forming a temporary guardrail that meets the height requirements. At this time, the scissor link 3 is in the extended state. When the vertical tilt angles increase, the first link 3.1 and the second link 3.2 tend to be more horizontal, decreasing the distance between the protective beam 2 and the base 1, thus retracting the temporary guardrail for storage or relocation. At this time, the scissor link 3 is in the retracted state.

[0046] Among them, the connecting rod limiting component 4 is set at the top of the protective beam 2 to fix the scissor-type connecting rod 3 in the unfolded state, so that the temporary guardrail maintains a stable protective posture. The base 1 is provided with a first storage groove 1.1 facing the protective beam 2. The cross-section of the first storage groove 1.1 is larger than the cross-section of the protective beam 2. When the scissor link 3 is in the retracted state, the first storage groove 1.1 can accommodate the protective beam 2 that has moved down into it. The opposite end faces of the first storage groove 1.1 and the protective beam 2 are respectively provided with a second storage groove 1.2 and a third storage groove 2.1. The second storage groove 1.2 is located below the first storage groove 1.1 and is opposite in position and corresponding in shape to the third storage groove 2.1. When the protective beam 2 moves into the first storage groove 1.1, although the scissor link 3 is in the retracted state, it is still located between the protective beam 2 and the base 1. It needs to be accommodated by the aligned second storage groove 1.2 and third storage groove 2.1. Therefore, the cross-sections of the second storage groove 1.2 and the third storage groove 2.1 should both be larger than the lateral dimension of the scissor link 3 in the accommodated state.

[0047] Furthermore, along the length of the temporary guardrail, the first side end of the base 1 and the first side end of the protective beam 2 are respectively provided with snap-fit ​​grooves 13, with the openings of the two sets of snap-fit ​​grooves 13 facing each other; the second side end of the base 1 and the second side end of the protective beam 2 are respectively provided with snap-fit ​​blocks 14, the shapes of which are adapted to the snap-fit ​​grooves 13. Specifically, the first side end of the base 1 and the first side end of the protective beam 2 are located on the same side, and the second side end of the base 1 and the second side end of the protective beam 2 are also located on the same side; the snap-fit ​​groove 13 on the first side end of the base 1 has an opening facing the protective beam 2, and a lateral opening extending outward along the length of the temporary guardrail; similarly, the snap-fit ​​groove 13 on the first side end of the protective beam 2 has an opening facing the base 1, and a lateral opening extending outward along the length of the temporary guardrail. Therefore, when the first set of temporary guardrails is stably erected and unfolded, the locking slots 13 on the base 1 and the protective beam 2 are spaced apart in the vertical direction. When installing the second set of temporary guardrails, the second set of temporary guardrails is first in the folded state. At this time, the locking block 14 on the base 1 is inserted into the locking slot 13 on the base 1 of the first set of temporary guardrails. Then, when the second set of temporary guardrails is unfolded in the vertical direction, the locking block 14 on the second set of protective beam 2 will naturally insert into the locking slot 13 on the first set of protective beam 2. Finally, the scissor-type connecting rod 3 in the second set of temporary guardrails can be fixed.

[0048] Because the inner wall of the locking groove 13 has a contour design suitable for limiting the locking block 14, the locking block 14 will not come out laterally from the locking groove 13. The two sets of locking blocks 14 are located in the upper and lower locking grooves 13 respectively. The top of the upper locking groove 13 limits the second set of temporary guardrails from the top, and the bottom of the lower locking groove 13 limits the second set of temporary guardrails from the bottom. Therefore, the locking block 14 will not come out longitudinally from the locking groove 13, ensuring the connection stability of adjacent temporary guardrails. When it is necessary to remove the temporary guardrail, reverse the installation sequence, first fold up the last installed temporary guardrail, and then remove it from the locking groove 13 of the previous set of temporary guardrails.

[0049] After adopting the above technical solution, the components of each temporary guardrail are already interconnected, eliminating the need for additional loose bolts, pins, and other connecting parts, thus fundamentally avoiding the trouble of losing parts. At the same time, the deployment and folding of the entire temporary guardrail is very convenient. To deploy, simply pull the scissor-type connecting rod 3 to the appropriate height; to fold, simply compress it. The entire process requires no tools. After folding, the protective beam 2 is precisely located in the first storage slot 1.1 of the base 1, while the scissor-type connecting rod 3 is also folded between the second storage slot 1.2 and the third storage slot 2.1. In this way, the protective beam 2 and the base 1 together provide effective protection for the scissor-type connecting rod 3. Simultaneously, the base 1 also acts as a protective enclosure for the protective beam 2, preventing damage from bumps during transportation or storage. Simply use simple ropes to tie and secure the folded assembly, and it can be easily stored or transported to the next construction area. In addition, the assembly between adjacent guardrails is very simple. By using the cooperation of the snap-fit ​​block 14 and the snap-fit ​​groove 13, one set of guardrails in the folded state is snapped into the fixed and unfolded guardrails from top to bottom, and then the second set of guardrails is unfolded and locked to complete the connection. This greatly improves the installation efficiency on the construction site and facilitates quick dismantling and reuse in the later stage.

[0050] To ensure the stability of the connection between adjacent guardrails, the locking block 14 includes a first locking part 14.1 and a second locking part 14.2, and the locking groove 13 includes a first groove segment 13.1 and a second groove segment 13.2. The first groove segment 13.1 corresponds to and locks the first locking part 14.1, and the second groove segment 13.2 corresponds to and locks the second locking part 14.2. Along the width direction of the temporary guardrail, the second locking part 14.2 is located on both sides of the first locking part 14.1. When the locking block 14 is inserted into the locking groove 13 in the vertical direction, the first locking part 14.1 enters the first groove segment 13.1, and at the same time, the second locking part 14.2 enters the second groove segment 13.2. The side wall of the second groove segment 13.2 forms a horizontal limit on the second locking part 14.2, which can prevent the locking block 14 from coming out of the locking groove 13 in the horizontal direction.

[0051] Considering that construction sites are often irregularly shaped and isolation areas frequently have corners or curves, this embodiment further improves the connection structure between adjacent guardrails. Specifically: along the length of the temporary guardrail, a first mounting block 11 is rotatably connected to the first side end of the base 1 and the first side end of the protective beam 2, respectively. The rotation axis of the first mounting block 11 extends along the height direction of the temporary guardrail, and a snap-fit ​​groove 13 is provided on the first mounting block 11; along the length of the temporary guardrail, a second mounting block 12 is rotatably connected to the second side end of the base 1 and the second side end of the protective beam 2, respectively. The rotation axis of the second mounting block 12 extends along the height direction of the temporary guardrail, and a snap-fit ​​block 14 is provided on the second mounting block 12.

[0052] When it is necessary to adjust the included angle between two adjacent sets of guardrails, simply rotate the corresponding first mounting block 11 or second mounting block 12 to change the relative orientation of the locking groove 13 and the locking block 14, thereby achieving connections at different angles and flexibly adapting to various zigzag and arc-shaped isolation requirements on the construction site. At the same time, this rotatable design does not affect the smoothness of the connection. If, during the installation of the second set of guardrails, it is found that the first mounting block 11 above the first set of guardrails has rotated accidentally, causing the locking groove 13 on it to misalign with the locking block 14 at the top of the second set of guardrails, the operator can easily manually rotate it back to the correct position, ensuring a smooth installation process.

[0053] To facilitate the installation of the first mounting block 11 and the second mounting block 12, corresponding mounting slots are respectively opened at the two sides of the base 1 and the protective beam 2. The first mounting block 11 and the second mounting block 12 are partially inserted into the corresponding slots, and their rotating connecting shafts are set inside the slots. This ensures smooth rotation and makes the overall structure more compact. At the same time, positioning bolts 15 are respectively provided on the base 1 and the protective beam 2. The positioning bolts 15 extend vertically, pass through the end of the slot, and directly press against the surface of the first mounting block 11 or the second mounting block 12. In actual use, when it is necessary to adjust the connection angle of adjacent guardrails, simply loosen the positioning bolts 15 slightly, at which point the first mounting block 11 or the second mounting block 12 can rotate flexibly; after the angle is adjusted to the correct position, tighten the positioning bolts 15 to press against the corresponding mounting block, thereby reliably locking the current angle and preventing accidental deflection due to collisions or vibrations on site.

[0054] It should be noted that the positioning bolt 15 is always installed on the temporary guardrail body. When adjusting, it only needs to be loosened or tightened slightly. There is no need to completely remove the bolt. Therefore, it fundamentally avoids the trouble of the bolt being placed randomly on site or even lost. It also saves the operation steps of repeated disassembly and assembly, further improving the efficiency of on-site construction.

[0055] Reference Appendix Figure 3 ,6 In embodiment 7, two first sliding grooves 1.3 are formed on the bottom surface of the second storage groove 1.2, and two second sliding grooves 2.4 are formed on the top surface of the third storage groove 2.1. The two first sliding grooves 1.3 are spaced apart both along the length and width of the base 1, and the two second sliding grooves 2.4 correspond to different first sliding grooves 1.3. Each first sliding groove 1.3 contains a first slider 5, and each second sliding groove 2.4 contains a second slider 6. During assembly, the bottom end of the first connecting rod 3.1 is rotatably connected to one of the first sliders 5, and the bottom end of the second connecting rod 3.2 is rotatably connected to the other first slider 5. After the first connecting rod 3.1 and the second connecting rod 3.2 cross and rotatably connect at the middle, the top end of the first connecting rod 3.1 is rotatably connected to one of the second sliders 6, and the top end of the second connecting rod 3.2 is rotatably connected to the other second slider 6. In this way, when the first link 3.1 and the second link 3.2 rotate around the rotating connection in the middle of them, the first slider 5 can slide smoothly in the first slide groove 1.3 along the length of the temporary guardrail, and the second slider 6 can also slide synchronously in the second slide groove 2.4 along the length of the temporary guardrail, thereby ensuring the stability and smoothness of the entire scissor link 3 during the unfolding or retraction process.

[0056] To further enhance the support for the protective beam 2 and improve the structural stability of the entire guardrail during use, an auxiliary support plate 8 is added between the base 1 and the protective beam 2 in this embodiment. The bottom end of the auxiliary support plate 8 is rotatably connected to the base 1, and its top end is rotatably connected to a third slider 7. Correspondingly, a third groove 2.5 is provided on the protective beam 2, and the third slider 7 is installed in the third groove 2.5 and can slide freely in the third groove 2.5 along the length of the temporary guardrail. When the scissor linkage 3 is extended or retracted, the auxiliary support plate 8 moves accordingly, and the third slider 7 slides in the third groove 2.5 accordingly, thereby providing additional vertical support for the protective beam 2 without hindering the normal extension and retraction function of the guardrail, effectively improving the guardrail's ability to withstand lateral or vertical loads.

[0057] To further optimize the structural layout and ensure smooth operation of the auxiliary support plate 8, this embodiment provides a first mounting shaft 9 rotatably connected to the auxiliary support plate 8 on the inner wall of the first storage groove 1.1. Simultaneously, a fifth storage groove 2.3 is provided at a corresponding position on the protective beam 2. This fifth storage groove 2.3 is located outside the third storage groove 2.1, and a second mounting shaft 10 rotatably connected to the auxiliary support plate 8 is provided in the fifth storage groove 2.3. Furthermore, a third sliding groove 2.5 is provided laterally on and connected to the fifth storage groove 2.3, and the second mounting shaft 10 is fixedly connected to the third slider 7. When the guardrail is unfolded or retracted, the auxiliary support plate 8 rotates around the first mounting shaft 9 and the second mounting shaft 10, and the third slider 7 slides in the third sliding groove 2.5.

[0058] In the retracted state, the protective beam 2 is precisely positioned within the first storage slot 1.1 of the base 1, and the scissor-type connecting rod 3 is also retracted between the second storage slot 1.2 and the third storage slot 2.1. The protective beam 2 and the base 1 together effectively protect the scissor-type connecting rod 3, while the base 1 also provides wrapping protection for the protective beam 2. Simultaneously, the auxiliary support plate 8 gradually becomes more horizontal and can be properly accommodated in the corresponding positions in the fifth storage slot 2.3 and the first storage slot 1.1, making the overall structure more compact. This avoids interference between the auxiliary support plate 8 and other components when retracted, and fully utilizes the original slot space, facilitating stacking, storage, and transportation.

[0059] Reference Appendix Figure 4 In this embodiment, the linkage limiting component 4 includes a linkage plate 4.1, a wing bolt 4.2, and a positioning pin 4.3. The linkage plate 4.1 is located above the protective beam 2. Along the height direction of the temporary guardrail, the wing bolt 4.2 passes through and is threaded to the linkage plate 4.1 and the protective beam 2 in sequence. The positioning pin 4.3 is located at the bottom of the linkage plate 4.1. Along the height direction of the temporary guardrail, the positioning pin 4.3 passes through and is pinned to the protective beam 2 and the second slider 6 in sequence.

[0060] When the guardrail needs to be deployed, first loosen the wing bolt 4.2 to increase the distance between the linkage plate 4.1 and the protective beam 2, causing the positioning pin 4.3 to rise upwards. It should be noted that when the guardrail is in its initial retracted state, the two second sliders 6 are located far apart in the second slide groove 2.4. At this time, the positioning pin 4.3 and the second sliders 6 are not aligned horizontally, therefore the positioning pin 4.3 is not initially inserted into the second sliders 6. Loosening the wing bolt 4.2 raises the positioning pin 4.3 to a position above the upper surface of the protective beam 2, to prevent the lower end of the positioning pin 4.3 from accidentally blocking or scraping against the second sliders 6 during subsequent deployment.

[0061] Next, pull the protective crossbeam 2 upwards, and the two second sliders 6 will gradually slide from the opposite ends of the second slide groove 2.4 toward the middle, while simultaneously driving the scissor linkage 3 to gradually unfold. When the scissor linkage 3 is fully unfolded, the two second sliders 6 slide to their closest possible positions, at which point the holes on the second sliders 6 are directly below the positioning pin 4.3.

[0062] Finally, tighten the wing bolts 4.2 in the reverse direction to reduce the distance between the linkage plate 4.1 and the protective beam 2. The positioning pins 4.3 then pass downwards through the protective beam 2 and insert into the corresponding holes of the second slider 6, thus firmly locking the second slider 6 in its current position. In this way, the entire scissor linkage 3 can maintain a stable extended state, ensuring that the temporary guardrail will not be accidentally retracted during use.

[0063] Because the first link 3.1 and the second link 3.2 are intersecting and do not overlap in the width direction of the guardrail, the two second sliders 6 are misaligned in both the length and width directions of the guardrail. Correspondingly, two positioning pins 4.3 are also provided, spaced apart in both the length and width directions of the guardrail, thus corresponding one-to-one with the positions of the two second sliders 6. This ensures that each positioning pin 4.3 can be accurately inserted into its corresponding second slider 6, achieving reliable locking.

[0064] Furthermore, the top of the protective beam 2 is provided with a fourth storage groove 2.2, and the bottom surface of the linkage plate 4.1 and the fourth storage groove 2.2 are respectively provided with hanging rings 16, and the two sets of hanging rings 16 are connected by a traction rope 17. In this way, no matter whether the wing bolt 4.2 is loosened or tightened, the linkage plate 4.1 is always connected to the protective beam 2 through the traction rope 17, which can effectively prevent the linkage plate 4.1 from accidentally falling or being lost during the adjustment process, and also allows the operator to adjust it at any time without worrying about losing small parts.

[0065] It should be noted that the wing bolts 4.2 are always installed on the temporary guardrail body. When adjusting, you only need to loosen or tighten them appropriately. There is no need to completely remove the bolts. Therefore, it fundamentally avoids the trouble of bolts being placed randomly on site or even lost. It also saves the operation steps of repeated disassembly and assembly, further improving the efficiency of on-site construction.

[0066] Compared with existing technologies, the advantages of this invention include: the base 1, protective beam 2, scissor-type connecting rod 3, and connecting rod limiting member 4 of the entire temporary guardrail are always in a connected whole state, eliminating the need to individually insert uprights, crossbars, or multiple bolts for fixing as in existing technologies, thus completely avoiding the problem of repeated disassembly and loss of scattered bolts. The height can be directly adjusted by unfolding and retracting the scissor-type connecting rod 3 without the need for tools, significantly shortening assembly and disassembly time. When connecting adjacent guardrails, simply insert the retracted second set of guardrails into the fixed first set of guardrails, then unfold and lock them, eliminating the need for bolts or pins at each connection point. The design of the locking groove 13 and locking block 14 effectively prevents them from falling off under stress. At the same time, the rotatable first mounting block 11 and second mounting block 12, in conjunction with the positioning bolt 15, can flexibly adapt to the corner or curve isolation requirements of the construction area, and reliably lock the adjusted angle, preventing angle changes due to accidental collisions.

[0067] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A temporary guard rail for urban overpass construction, characterized by, The temporary guardrail includes a base and a protective beam. The protective beam is located above the base and is movably connected to the base via a scissor-type connecting rod. The base has a first storage slot for accommodating the protective beam. The first storage slot and the opposite end faces of the protective beam have a second storage slot and a third storage slot, respectively. The bottom end of the scissor-type connecting rod is located in the second storage slot, and the top end is located in the third storage slot. The second and third storage slots are aligned to accommodate the scissor-type connecting rod in a retracted state. The top end of the protective beam has a connecting rod limiting member for fixing the scissor-type connecting rod in an extended state. Along the length of the temporary guardrail, the first side end of the base and the first side end of the protective beam each have a snap-fit ​​groove, with the openings of the two sets of snap-fit ​​grooves facing each other. The second side end of the base and the second side end of the protective beam each have a snap-fit ​​block, the shape of which is adapted to the snap-fit ​​groove.

2. The temporary guard rail for urban overpass construction according to claim 1, wherein The bottom surface of the second storage slot is provided with a first sliding groove, and the top surface of the third storage slot is provided with a second sliding groove; the bottom end of the scissor-type connecting rod is rotatably connected to a first slider located in the first sliding groove, and the top end is rotatably connected to a second slider located in the second sliding groove. The first slider can slide along the length direction of the temporary guardrail in the first sliding groove, and the second slider can slide along the length direction of the temporary guardrail in the second sliding groove.

3. The temporary protective barrier for urban overpass construction according to claim 2, characterized in that, The linkage limiting component includes a linkage plate, a wing bolt, and a positioning pin. The linkage plate is located above the protective crossbeam, and the wing bolt passes through and is threaded onto the linkage plate and the protective crossbeam in sequence. The positioning pin is located at the bottom of the linkage plate and passes through and is pinned onto the protective crossbeam and the second slider in sequence.

4. The temporary protective barrier for urban overpass construction according to claim 3, characterized in that, The top of the protective beam is provided with a fourth storage slot, and the bottom surface of the linkage plate and the fourth storage slot are respectively provided with hanging rings. The two sets of hanging rings are connected by a traction rope.

5. The temporary protective barrier for urban overpass construction according to any one of claims 1-4, characterized in that, An auxiliary support plate is provided between the base and the protective beam. The bottom end of the auxiliary support plate is rotatably connected to the base, and the top end is rotatably connected to a third slider. The third slider is located in a third groove on the protective beam and can slide along the length of the temporary guardrail in the third groove.

6. The temporary protective barrier for urban overpass construction according to claim 5, characterized in that, The inner wall of the first storage groove is provided with a first mounting shaft that is rotatably connected to the auxiliary support plate; the protective crossbeam is provided with a fifth storage groove, the fifth storage groove is provided with a second mounting shaft that is rotatably connected to the auxiliary support plate, the third slide groove is connected to the fifth storage groove, and the second mounting shaft is fixedly connected to the third slider.

7. The temporary protective barrier for urban overpass construction according to any one of claims 1-4 and 6, characterized in that, Along the length of the temporary guardrail, the first side end of the base and the first side end of the protective beam are respectively rotatably connected to a first mounting block. The rotation axis of the first mounting block extends along the height direction of the temporary guardrail, and the snap-fit ​​groove is provided on the first mounting block.

8. The temporary protective barrier for urban overpass construction according to claim 7, characterized in that, Along the length of the temporary guardrail, the second side end of the base and the second side end of the protective beam are respectively rotatably connected to a second mounting block. The rotation axis of the second mounting block extends along the height of the temporary guardrail, and the snap-fit ​​block is provided on the second mounting block.

9. The temporary protective barrier for urban overpass construction according to claim 8, characterized in that, The snap-fit ​​block includes a first snap-fit ​​part and a second snap-fit ​​part, and the snap-fit ​​groove includes a first groove segment and a second groove segment. The first groove segment corresponds to and snaps into the first snap-fit ​​part, and the second groove segment corresponds to and snaps into the second snap-fit ​​part. Along the width direction of the temporary guardrail, the second snap-fit ​​part is provided on both sides of the first snap-fit ​​part.

10. The method of using the temporary protective barrier for urban overpass construction as described in any one of claims 1-9, characterized in that, Including the following steps: Pull the protective beam vertically to rotate the scissor link to its extended limit position, and lock the scissor link using the link limiter. Place another set of temporary guardrails in the retracted state to the side of the extended temporary guardrails, so that the snap-fit ​​blocks on the base of the retracted temporary guardrails are inserted into the snap-fit ​​slots on the base of the extended temporary guardrails. Pull the protective beam in the retracted temporary guardrail vertically so that the locking block on the protective beam in the retracted temporary guardrail is inserted into the locking groove of the protective beam in the unfolded temporary guardrail, and lock the scissor linkage using the connecting rod limiting component.

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