A portable traffic sign

Abstract

The application discloses a portable traffic sign, which comprises a front warning layer and an elastic framework layer arranged on the back of the front warning layer. The elastic framework layer is composed of an enclosed framework body of alloy wires with shape memory effect, and the alloy wires are clamped and fixed by a plurality of spaced connection cloth strips. The end connection of the alloy wires is covered with a protective piece. The traffic sign further comprises a back layer, which is covered with the elastic framework layer together with the front warning layer to form an integrated composite structure. At least one elastic bandage for fixing the traffic sign to an external carrier is arranged on the back layer, so as to solve the technical problems of non-standard sign form, easy deformation of the elastic supporting ring and poor shaping effect.

Description

Technical Field

[0001] This application relates to a portable traffic sign, belonging to the technical field of traffic safety facilities. Background Technology

[0002] Traffic signs, as a core component of the road traffic safety system, play a vital role in road construction warnings, emergency traffic control, and accident scene handling. Portable traffic signs, due to their rapid deployment and flexible relocation capabilities, have become an important tool for maintaining dynamic traffic order and operational safety.

[0003] In the development of this technology, foldable elastic frame structures have become the mainstream design direction due to their ability to balance portability and shape retention after unfolding. Currently, some designs utilize elastic support rings combined with flexible fabrics, achieving portability through folding. However, many shortcomings remain in practical engineering applications. For example, existing technologies often use direct stitching or simple adhesive to connect the elastic frame and reflective fabric. Under external forces such as wind or human contact, stress concentration easily occurs at the joint, leading to fabric tearing or loosening of seams, affecting the integrity of the reflective area and weakening the reliability of the warning effect. While some products use elastic straps for fixation, the strap layout is relatively simple and difficult to adapt to different installation carriers such as road railings, temporary bollards, and traffic cones. Furthermore, the connection strength between the straps and the sign body is limited, making them prone to loosening in complex traffic environments, reducing positional stability after installation and affecting the continued effectiveness of its warning function. The elastic frame needs to achieve a reasonable balance between low stiffness when folded and high stiffness when unfolded. Although existing technologies have attempted to use materials with elastic recovery properties, such as shape memory alloys, in practical applications, how to achieve rapid and stable shape recovery and maintenance of the skeleton while meeting the requirements of compact storage through the cooperation of structural design and auxiliary components remains a challenge in technology implementation.

[0004] Furthermore, existing portable traffic signs have limitations in material usage. For example, some products use non-reflective fabric, resulting in poor nighttime visibility. After repeated use, the support performance of the elastic frame tends to weaken, affecting the sign's reusability. Existing products have limited applicability to different traffic environments and installation conditions, and the design of some products does not fully comply with current regulations, potentially misleading drivers. There is still room for improvement in the existing structure regarding storage and portability. Summary of the Invention

[0005] The purpose of this application is to overcome the shortcomings of the prior art and provide a portable traffic sign that solves the comprehensive problems of existing portable traffic signs in terms of the stability of the skeleton fabric, the adaptability to multiple scenarios, and the balance of elastic shaping.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides a portable traffic sign, including a front warning layer and a flexible skeleton layer disposed on its back. The elastic skeleton layer is composed of a closed skeleton body made of alloy wires with shape memory effect. The alloy wires are clamped and fixed by multiple spaced connecting strips. The end connections of the alloy wires are covered with protective parts. The traffic sign also includes a back layer, which together with the front warning layer covers the elastic skeleton layer to form an integrated composite structure; the back layer is provided with at least one elastic strap for fixing the traffic sign to the external carrier.

[0007] Furthermore, the shape of the main skeleton body includes triangles, circles, or polygons.

[0008] Furthermore, the alloy wire with shape memory effect is a nickel-titanium alloy flat wire, wherein the width of the nickel-titanium alloy flat wire is 2-4 mm and the thickness is 0.5-1.0 mm.

[0009] Furthermore, the protective component is an L-shaped corner sleeve made of TPR thermoplastic elastomer.

[0010] Furthermore, the front warning layer is made of TC reflective fabric, and its edges are sewn with a skeleton fixing sleeve, the edges of which are nested inside the skeleton fixing sleeve.

[0011] Furthermore, there are two elastic straps, which are symmetrically arranged on the back layer.

[0012] Furthermore, the backing layer is made of non-elastic backing fabric; the connecting strip is a polyester strip; and the elastic strap is a spandex blended strap.

[0013] Furthermore, the front warning layer and the elastic skeleton layer are connected by a nesting method, and the back layer and the front warning layer are connected by a sewing method, together forming an integrated composite structure covering the elastic skeleton layer.

[0014] Compared with the prior art, the beneficial effects achieved by this application are as follows: This application provides a portable traffic sign that uses a nickel-titanium alloy flat wire with shape memory effect to form a skeleton and uses polyester strips for clamping and restraint, so that the sign can quickly and automatically return to a stable structure after being unfolded from a folded state, overcoming the problems of non-standard shape of traditional circular signs and easy deformation and poor shaping effect of elastic support rings.

[0015] By adding a polyester strip as an intermediate reinforcing layer between the skeleton and the fabric, a composite structure is formed and cooperated with the skeleton fixing sleeve, which significantly enhances the firmness of the joint surface, effectively disperses external stress, prevents fabric tearing and unraveling, and improves the durability and integrity of the product. By using L-shaped corner sleeves made of soft plastic to wrap around the metal ends of the frame, the impact of the corners is buffered and the risk of exposed sharp ends is eliminated, while protecting the frame structure and improving safety and lifespan.

[0016] This application features two highly elastic straps symmetrically positioned on the back of the traffic sign, enabling it to be securely fixed to guardrails or bollards of different cross-sectional shapes, such as circles and rectangles. This solves the problems of traditional fixing methods being monotonous, prone to loosening, and having poor adaptability. Attached Figure Description

[0017] Figure 1 This is a front structural diagram of a portable traffic sign provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the elastic skeleton layer provided in the embodiments of this application; Figure 3 This is a schematic diagram of the back structure of a portable traffic sign provided in an embodiment of this application; Figure 4 This is a schematic diagram of a portable traffic sign in its curled-up and stored state, provided in an embodiment of this application. Figure 5 This is a structural diagram of the second portable traffic sign provided in the embodiments of this application. In the diagram, a is a front view, b is a structural diagram of the elastic skeleton layer, and c is a back view. Figure 6 This is a structural diagram of the third portable traffic sign provided in the embodiments of this application; in the figure, a is a front view, b is a structural diagram of the elastic skeleton layer, and c is a back view; In the diagram: 1. Elastic skeleton layer; 1.1. Nickel-titanium alloy flat wire; 1.2. Polyester strip; 1.3. Protective parts; 1.4. Skeleton fixing sleeve; 2. TC reflective fabric; 3. Backing polyester fabric; 4. Elastic straps. Detailed Implementation

[0018] The present application will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and should not be used to limit the scope of protection of the present application.

[0019] Example 1

[0020] This embodiment provides a portable traffic sign, including an elastic skeleton layer 1. The elastic skeleton layer 1 is composed of a nickel-titanium alloy flat wire 1.1, a polyester cloth strip 1.2, and a protective component 1.3, and is the key technology for realizing the folding and portability and unfolding and shaping of the traffic sign.

[0021] 1.1 Nickel-titanium alloy flat wire with a width of 3mm and a thickness of 0.7mm is selected as the main body of the elastic skeleton. Nickel-titanium alloy has shape memory effect and elastic recovery ability. When folded, the main body of the skeleton can be plastically deformed by external force and stored in a small volume state; after unfolding, it can quickly return to the preset original shape due to the material properties of nickel-titanium alloy, providing stable support stiffness for the logo.

[0022] In this embodiment, the elastic skeleton layer 1 is triangular in shape, but it can also be designed in other shapes as needed. Figure 5 , Figure 6 The figures shown are structural diagrams of two other portable traffic signs provided in this application. Their structures and materials are the same as those of the portable traffic sign in Embodiment 1, but their styles are different. Specifically, they can be circular, rectangular, or other polygonal.

[0023] The width of the nickel-titanium alloy flat wire is 2-4mm, and the thickness is 0.5-1.0mm. The nickel-titanium alloy flat wire 1.1 purchased in this embodiment is a medical-grade nickel-titanium alloy flat wire with a width of 3mm and a thickness of 0.7mm. Its phase transformation temperature is set at 25℃. It is in the austenitic state at room temperature. It is cut into 3 sections according to the perimeter of a triangle and pre-formed into the three sides of a triangular skeleton by a mold.

[0024] like Figure 2 As shown, the blue stripe indicates that the polyester stripe 1.2 is made of multiple layers of parallel and / or diagonally arranged polyester strips, which clamp and sew the nickel-titanium alloy flat wire 1.1 together.

[0025] The polyester strip 1.2 acts as an "interval constraint" for the nickel-titanium alloy flat wire 1.1, ensuring that the flat wire is arranged in an orderly manner after unfolding and avoiding a scattered skeleton. At the same time, the polyester strip 1.2, as an "intermediate connecting layer", can enhance the bonding strength between the nickel-titanium alloy flat wire 1.1 and the front / back fabric, and alleviate stress concentration under external force.

[0026] In this embodiment, the polyester strip 1.2 is made of 400D polyester canvas, cut to a suitable length and width, treated with UV resistance, and has a UV protective coating.

[0027] like Figure 3 As shown in the shadow on the back of the elastic skeleton layer 1, the protective component 1.3 is set at the three corners of the elastic skeleton layer 1. The end of the nickel-titanium alloy flat wire is wrapped with soft plastic. The flexibility of the soft plastic can buffer the impact of external force and prevent the sharp end of the flat wire from directly contacting the outside world / operators, thereby improving the durability and safety of the skeleton.

[0028] In this embodiment, the protective component 1.3 is made of TPR thermoplastic elastomer with a Shore hardness of 60A. It is molded into an "L-shaped corner sleeve" with an inner angle of 60° by injection molding.

[0029] like Figure 1 As shown, the front of the traffic sign is equipped with TC reflective fabric 2. In this embodiment, the TC reflective fabric selected conforms to the requirements of "Road Traffic Signs and Markings Part 2: Road Traffic Signs", GB 5768.2-2022. The surface is treated with a glass microbead or microprism reflective coating to ensure a retroreflection coefficient ≥300 cd·lx. -1 ・m -2 It meets the performance standards of Level 2 reflective film and is cut into an equilateral triangle (50cm on each side) to serve as the front warning layer.

[0030] The reflective coating on the surface of TC reflective fabric 2 can produce a strong reflective effect under vehicle headlights and natural light, meeting the visibility requirements of traffic warnings and playing a reflective warning role.

[0031] The outer edge of the TC reflective fabric 2 is nested with a skeleton fixing sleeve 1.4, which fits tightly against the inner elastic skeleton layer 1. The skeleton fixing sleeve 1.4 is made of flexible and wear-resistant PVC coated fabric, which not only provides circumferential constraint to the elastic skeleton to ensure that the sign is a regular triangular shape after unfolding, but also protects the edges of the TC reflective fabric and prevents curling and wear during long-term use.

[0032] The back of the traffic sign uses non-elastic backing polyester fabric 3 as the base layer, and selects 210D non-elastic polyester fabric with a warp tensile strength ≥300N, cut into a triangle the same size as the TC reflective fabric.

[0033] The backing polyester fabric 3 wraps around the back area of ​​the nickel-titanium alloy flat wire 1.1, which on the one hand forms a back constraint on the elastic skeleton layer 1, enhancing the overall shape stability of the logo; on the other hand, the non-elastic polyester fabric balances the flexibility of the front TC reflective fabric, preventing the logo from deforming due to the difference in elasticity between the two sides of the fabric.

[0034] A double-layered elastic strap 4 is symmetrically arranged on the polyester backing fabric 3. The elastic strap 4 is made of highly elastic fiber fabric such as spandex blend and is firmly connected to the polyester backing fabric 3 by sewing. The double-layer layout can be adapted to different carriers such as round guardrails, rectangular road posts, and traffic cones. When in use, the stretching degree of the elastic strap 4 can be adjusted, and the elastic recovery force can be used to adaptively tighten the carrier, ensuring that the sign is not easy to shift or loosen after it is fixed, thus improving the adaptability of the sign to deployment in multiple scenarios.

[0035] Specifically, in this embodiment, the elastic strap 4 is made of 5cm wide spandex blended tape with an elastic elongation rate of ≥200%, and both ends are sewn with metal D-ring buckles.

[0036] Example 2

[0037] This embodiment provides an assembly process for a portable traffic sign, as follows: (1) Fabrication of the elastic skeleton layer.

[0038] Align the ends of the three sections of nickel-titanium alloy flat wire 1.1, insert them into the L-shaped corner sleeves of the protective part 1.3, and fix them with hot melt adhesive to form a closed triangular skeleton; Along the length of the nickel-titanium alloy flat thread 1.1, sew a polyester strip 1.2 every 2cm. The polyester strip 1.2 covers the nickel-titanium alloy flat thread 1.1 in the center, and its two sides are aligned with the edges of the nickel-titanium alloy flat thread 1.1. Use overlock sewing with a stitch density of 10 stitches / cm to ensure that the flat thread is clamped and fixed and can deform elastically with the skeleton.

[0039] (2) The combination of the front warning layer and the elastic skeleton layer of the traffic sign.

[0040] The back of the TC reflective fabric 2 is a non-reflective side. A skeleton fixing sleeve 1.4 is sewn onto the edge of the non-reflective side. Specifically, the skeleton fixing sleeve 1.4 is a PVC skeleton fixing sleeve with a width of 1.5cm and the opening facing inward. The outer edge of the triangle of the elastic skeleton layer 1 is inserted into the skeleton fixing sleeve 1.4. The opening is tightened by a drawstring so that the TC reflective fabric 2 and the elastic skeleton layer 1 fit tightly together. The end of the opening is then sewn to fix it.

[0041] (3) Assemble the back of the traffic sign.

[0042] Cover the back of the elastic skeleton layer 1 with the polyester backing fabric 3, aligning its edge with the TC reflective fabric 2 on the front. Secure the edges of the three layers—the front fabric, the skeleton layer, and the backing fabric—with double-stitched binding sewing. At the center line of the polyester backing fabric 3, sew two elastic straps symmetrically.

[0043] Example 3

[0044] This embodiment provides an operation and usage procedure for a portable traffic sign, including: Folding and Storage: The operator holds any two corners of the traffic sign with both hands, applies pressure towards the center, and twists it into a figure-eight shape. The two circles within the figure-eight are then overlapped, causing the nickel-titanium alloy flat wire to bend and deform (1.1 mm), folding it into a circle with a diameter ≤20 cm. Figure 4 As shown; secure it with elastic straps or other straps and store it in a storage bag. In this embodiment, the storage bag is an Oxford cloth storage bag with a size of 25cm × 25cm.

[0045] Unwinding and Shaping: After untying the straps, the nickel-titanium alloy flat wire 1.1 will automatically recover its triangular shape within 10 seconds under the shape memory effect, and its error will be tested to be ≤2°; check whether the protective part 1.3 is stable and whether the surface of the reflective cloth is flat, and ensure that the wrinkle area of ​​the TC reflective cloth 2 is ≤5%.

[0046] Fixed operations in multiple scenarios: For fixing to a circular guardrail with a diameter of 5cm-15cm: wrap two elastic straps 4 around the guardrail and tighten the straps; For rectangular bollards with sides of 10cm-20cm: Adjust the angle of the elastic straps 4 so that the two straps are wrapped around the adjacent sides of the bollard respectively; To secure to the barrier: simply pass the strap through the pre-drilled hole in the barrier, tighten it in the opposite direction, and lock it in place.

[0047] In this application, the various structural layers are integrated through sewing and material nesting: the front TC reflective fabric 2 is sewn and fixed to the polyester strip 1.2 in the elastic skeleton layer 1, ensuring that the reflective layer and the support layer deform synchronously. The nickel-titanium alloy flat wire 1.1 is sandwiched between the polyester strip 1.2, and then sewn to the backing polyester fabric 3 on the back to form a "sandwich" composite structure. The protective component 3 is injection molded or bonded to the end of the nickel-titanium alloy flat wire 1.1 and the edge of the backing polyester fabric 3 to achieve corner sealing protection.

[0048] This application provides a portable traffic sign that, throughout the entire process of "storage-expansion-fixation-warning," utilizes the elasticity of nickel-titanium alloy to achieve small-volume storage and rapid shaping, while also improving the durability of the frame, the reliability of the fabric bonding, and the adaptability to multiple carriers through the synergistic effect of polyester fabric, protective components, and elastic straps. Ultimately, it achieves the technical effects of being portable, efficient, providing stable warnings, and suitable for various scenarios.

[0049] Example 4

[0050] This embodiment provides a performance test for portable traffic signs, including tests on shape stability, durability, reflectivity, and fixation reliability.

[0051] According to the corresponding measurement standards, the portable traffic sign assembled in Example 2, after being unfolded, under wind speed of 3.4-5.4 m / s and level 3 wind conditions, has a plane tilt angle of ≤5°, which meets the requirements for shape stability.

[0052] After 1000 folding-unfolding cycles, the nickel-titanium alloy flat wire 1.1 exhibits no plastic deformation, a straightness error of ≤1mm / m, and excellent durability.

[0053] In an environment ranging from -30℃ to 60℃, the retroreflection coefficient attenuation rate is ≤10%, and the reflective performance meets the requirements of GB / T 18833-2012.

[0054] Under wind conditions of level 5 with wind speeds of 8.0-10.7 m / s, the displacement of the marker is ≤5 cm, indicating high reliability of fixation.

[0055] The above tests show that the portable traffic sign developed in this application achieves synergistic optimization of "material-structure-function" and meets the temporary portable warning needs in scenarios such as road construction and emergency response.

[0056] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A portable traffic sign, characterized in that, Includes a front warning layer and a flexible skeleton layer on its back. The elastic skeleton layer is composed of a closed skeleton body made of alloy wires with shape memory effect. The alloy wires are clamped and fixed by multiple spaced connecting strips. The end connections of the alloy wires are covered with protective parts. The traffic sign also includes a back layer, which together with the front warning layer covers the elastic skeleton layer to form an integrated composite structure; the back layer is provided with at least one elastic strap for fixing the traffic sign to the external carrier.

2. The portable traffic sign according to claim 1, characterized in that, The shape of the main skeleton can be triangular, circular, or polygonal.

3. The portable traffic sign according to claim 1, characterized in that, The alloy wire with shape memory effect is a nickel-titanium alloy flat wire, the width of which is 2-4 mm and the thickness is 0.5-1.0 mm.

4. The portable traffic sign according to claim 1, characterized in that, The protective component is an L-shaped corner sleeve made of TPR thermoplastic elastomer.

5. The portable traffic sign according to claim 1, characterized in that, The front warning layer is made of TC reflective fabric, and its edges are sewn with a skeleton fixing sleeve. The edge of the elastic skeleton layer is nested inside the skeleton fixing sleeve.

6. The portable traffic sign according to claim 1, characterized in that, The elastic straps consist of two pieces and are symmetrically arranged on the back layer.

7. The portable traffic sign according to claim 1, characterized in that, The backing layer is made of non-elastic backing fabric; the connecting strip is a polyester strip; and the elastic strap is a spandex blend.

8. The portable traffic sign according to claim 1, characterized in that, The front warning layer and the elastic skeleton layer are connected by nesting, and the back layer and the front warning layer are connected by sewing, together forming an integrated composite structure that covers the elastic skeleton layer.

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