Fire safety shoes

Abstract

The utility model discloses a kind of safety shoes for fire fighting, belong to fire protection equipment field, including shoe body, shoe sole and anti-drop component. Shoe sole is formed by buffer layer, puncture resistance layer, sole integrally pressed, buffer layer is EVA foamed material, puncture resistance layer is Kevlar fiber knitted layer, sole is nitrile rubber and silicon carbide particle composite material and is equipped with antiskid line and drainage groove, sole also contains nanometer silicon dioxide high-temperature resistant additive;Upper is flame-retardant canvas and neoprene coating composite structure, inside side sticks polyester fiber breathable layer, toe is embedded arc steel head, heel is equipped with antiskid convex point;Anti-drop component contains shoe tube place inner cavity and internal elastic rope. The safety shoes are coordinated through each structure, realize buffer puncture resistance, antiskid drainage, wide temperature range stability, flame-retardant breathable, wear stable and the like, can provide comprehensive protection for foot in fire fighting operation, guarantee firemen operation safety and comfort.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and more specifically, to a fire safety shoe for firefighters that provides comprehensive protection for their feet in firefighting operations. Background Technology

[0002] During firefighting operations, firefighters face a variety of safety hazards, including punctures from sharp objects, burns from high temperatures, slippery surfaces, impacts from heavy objects, and foot injuries. Therefore, fire safety shoes are an important piece of foot protection equipment, and their performance directly affects the safety and efficiency of firefighters' work.

[0003] Currently, fire safety shoes on the market have several shortcomings: First, they have poor cushioning performance, making it difficult to effectively absorb impact when firefighters move quickly or step on protruding objects, easily leading to foot fatigue or injury; second, they lack puncture resistance, failing to reliably prevent punctures from sharp objects such as steel bars and glass shards at fire scenes, easily causing foot injuries; third, their anti-slip and drainage performance is inadequate. Fire scenes are often accompanied by water accumulation and oil stains, and the existing safety shoes have unreasonable sole tread designs, making them prone to slipping and having slow drainage speed, further increasing operational risks. Fourth, the high-temperature resistance range is narrow. Temperature fluctuations at fire scenes are large, and some safety shoes are prone to deformation and softening in high-temperature environments, and brittleness in low-temperature environments, making it impossible to maintain stable structural performance. Fifth, the shoe top is prone to falling off. When firefighters are climbing, running, or engaging in other strenuous activities, the shoe top is prone to slipping off from the ankle, affecting the convenience of operation. Sixth, it is difficult to balance the flame retardancy and breathability of the shoe upper. Some shoe uppers use thick materials to ensure flame retardancy, resulting in poor breathability. Wearing them for a long time can easily make the feet feel stuffy and damp. Although some shoe uppers focus on breathability, their flame retardancy performance cannot meet the needs of firefighting operations.

[0004] In view of the shortcomings of existing fire safety shoes, there is an urgent need for a fire safety shoe that combines excellent cushioning and puncture resistance, anti-slip and drainage performance, wide temperature range stability, wearing stability, flame retardancy and breathability to ensure the safety and comfort of firefighters during operation. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of existing fire safety shoes and provide a fire safety shoe that, through reasonable structural design and material selection, provides comprehensive protection for the feet of firefighters while taking into account both wearing comfort and operational convenience.

[0006] This fire safety shoe consists of a shoe body and a sole, as well as an anti-slip component located at the shoe's upper. The sole, from top to bottom, comprises a cushioning layer, a puncture-resistant layer, and an outsole. These three layers are integrally molded using a single pressing process, ensuring a stable structural connection and preventing delamination. The cushioning layer uses EVA foam material with a thickness of 2-3mm. EVA foam material has excellent elasticity and cushioning properties, effectively absorbing impact when firefighters step on protruding objects or move quickly, reducing foot stress and fatigue. The puncture-resistant layer uses a Kevlar fiber woven layer with a surface density of 120-150g / m². Kevlar fiber is characterized by high strength and high toughness, reliably resisting punctures from sharp objects and protecting the feet from puncture injuries. Furthermore, the Kevlar fiber in the puncture-resistant layer uses a twill weave, which allows for more even stress distribution and can withstand puncture forces of at least 500N, significantly improving puncture resistance.

[0007] The outsole is made of a composite material of nitrile rubber and silicon carbide particles. The silicon carbide particles have a particle size of 0.5-1mm and account for 15%-20% of the total mass. Nitrile rubber has good wear resistance, oil resistance, and elasticity, while silicon carbide particles enhance the outsole's hardness and anti-slip performance, preventing excessive wear on rough and hard surfaces. Meanwhile, the outer surface of the outsole features staggered diamond-shaped anti-slip patterns and longitudinal drainage grooves. The staggered diamond-shaped anti-slip patterns increase the friction between the sole and the ground, effectively preventing slippage, especially on wet or waterlogged surfaces. The longitudinal drainage grooves quickly drain water between the sole and the ground, further enhancing the anti-slip effect. Specifically, the staggered diamond-shaped anti-slip patterns are 1.5-2mm deep, and the longitudinal drainage grooves are 2mm wide and 1.5mm deep, extending to the edge of the sole at both ends to ensure complete drainage without residue. In addition, the outsole contains 5%-8% nano-silica high-temperature resistant additives. Nano-silica can improve the high-temperature resistance and structural stability of nitrile rubber, so that the safety shoes can maintain structural stability in environments ranging from -30℃ to 200℃. They will not soften or deform due to excessively high temperatures, nor will they become brittle and crack due to excessively low temperatures, making them suitable for extreme temperature environments in firefighting operations.

[0008] The shoe upper features a composite structure of flame-retardant canvas and a neoprene coating. The flame-retardant canvas offers excellent flame retardancy and breathability, while the neoprene coating enhances the upper's waterproofness and abrasion resistance. This combination ensures both flame retardancy and breathability, while maintaining durability. The flame-retardant canvas has a limiting oxygen index (LOI) of at least 30%. A higher LIO index indicates superior flame retardancy, effectively preventing the spread of flames and ignition. The neoprene coating is 0.3-0.5mm thick, a thickness that ensures waterproof and abrasion resistance without excessively increasing the upper's thickness and compromising comfort. A polyester fiber breathable layer is bonded to the inner side of the upper. Polyester fibers offer excellent breathability and moisture absorption, quickly absorbing and wicking away sweat to keep feet dry and prevent stuffiness and dampness from prolonged wear.

[0009] The shoe features an internal curved steel toe cap. This curved structure conforms to the contours of the toes, providing reliable impact and compression protection without hindering toe movement. This prevents toe injuries to firefighters during operations caused by falling objects or collisions. Furthermore, the curved steel toe cap is 1.2-1.5mm thick, ensuring structural strength without excessively increasing the toe's weight. The steel toe cap is wrapped in flame-retardant rubber, which not only prevents direct contact between the steel toe cap and the foot, thus avoiding discomfort, but also further enhances the toe's flame-retardant and cushioning properties.

[0010] The outer side of the heel is equipped with anti-slip bumps, which increase the friction between the heel and the ground. This is especially helpful when firefighters are bending over or turning to the side, preventing the heel from slipping and improving operational stability. Specifically, the heel height is 3-4cm, which ensures the comfort of firefighters while allowing the cushioning and puncture-resistant layers of the sole to function better. The anti-slip bumps are 3mm in diameter and 5mm apart. This size design ensures anti-slip performance while avoiding discomfort caused by too many bumps.

[0011] The anti-slip component includes an inner cavity around the shoe upper, with an elastic cord inserted inside. The elastic cord can be adjusted according to the size of the firefighter's ankle. By tightening the elastic cord, the shoe upper can fit snugly against the ankle, preventing the shoe upper from slipping off the ankle during strenuous activities such as climbing, running, and jumping, thus ensuring stability. At the same time, the elastic cord has good elasticity and will not excessively restrict the ankle, ensuring wearing comfort.

[0012] In firefighting operations, these fire safety shoes provide comprehensive foot protection through the coordinated action of their various components:

[0013] Cushioning and Puncture Resistance: When firefighters step on protruding objects or sharp objects on the ground, the upper EVA foam cushioning layer of the sole first absorbs the impact, reducing the instantaneous force on the foot and preventing foot fatigue or injury. Subsequently, the middle Kevlar fiber woven puncture-resistant layer, with its high strength, resists the puncture of sharp objects, preventing them from penetrating the sole and injuring the foot. The twill weave pattern ensures even stress distribution on the fibers, further improving puncture resistance reliability and stably resisting puncture forces of not less than 500N.

[0014] Anti-slip and drainage protection: When there is standing water or oil at the fire scene, the staggered diamond anti-slip pattern on the outsole increases the contact friction between the sole and the ground, preventing the sole from slipping. At the same time, the longitudinal drainage channels quickly drain the water between the sole and the ground, and the drainage channels extend to the edge of the sole to ensure that no water remains and to prevent the formation of a water film between the sole and the ground, further improving the anti-slip effect. The composite material of nitrile rubber and silicon carbide particles in the outsole not only enhances wear resistance but also further improves anti-slip performance, ensuring that firefighters can walk stably in complex ground environments.

[0015] High-temperature protection: When the temperature at the fire scene rises to the high-temperature range (maximum 200℃) or is in a low-temperature environment (minimum -30℃), the nano-silica high-temperature resistant additive added to the outsole comes into play. This additive can enhance the high-temperature stability and low-temperature brittleness resistance of nitrile rubber, so that the outsole will not soften and deform due to high temperature, nor will it become brittle and crack due to low temperature. At the same time, the flame-retardant canvas and neoprene coating of the upper, as well as the flame-retardant rubber outside the steel toe cap, can also resist high-temperature baking, preventing the upper and toe from being damaged by high temperature, ensuring that the entire safety shoe maintains structural stability in extreme temperature environments and continues to play a protective role.

[0016] Flame retardancy and breathable protection: When exposed to flames or high temperatures, the flame-retardant canvas on the upper (limiting oxygen index ≥30%) can prevent the spread of flames, while the neoprene coating further isolates the flames and high temperatures, preventing the upper from being ignited. At the same time, the polyester fiber breathable layer on the inside of the upper quickly absorbs sweat from the feet and discharges it through the breathable pores of the flame-retardant canvas, achieving the breathability of the upper and keeping the feet dry. This solves the problem of balancing flame retardancy and breathability in traditional fire-fighting shoes.

[0017] Toe protection: When the toe of the shoe is hit by a heavy object or collided with it, the built-in curved steel toe cap, with its thickness of 1.2-1.5mm, provides reliable structural support to resist impact and compression forces and prevent direct injury to the toes; the flame-retardant rubber wrapped around the steel toe cap can further absorb the impact force during the collision, while preventing the steel toe cap from directly contacting the foot and causing discomfort, thus improving wearing safety and comfort.

[0018] Anti-slip heel and stable shoe shaft protection: When firefighters bend over, turn sideways, or walk on sloping ground, the anti-slip protrusions on the outside of the heel (3mm in diameter, 5mm apart) increase the friction between the heel and the ground, preventing the heel from slipping; at the same time, the anti-slip component at the shoe shaft, through the adjustable elastic cord, makes the shoe shaft fit snugly against the ankle, preventing the shoe shaft from slipping off during vigorous movements, ensuring a stable fit and not affecting the firefighters' mobility.

[0019] Beneficial effects

[0020] Excellent cushioning and puncture resistance: The combination of EVA foam cushioning layer and Kevlar fiber woven puncture resistance layer can effectively absorb impact and reduce foot fatigue, while reliably resisting puncture force of not less than 500N, avoiding sharp objects from piercing the feet and providing double protection for the feet.

[0021] Outstanding anti-slip and drainage performance: The outsole features a staggered diamond anti-slip pattern and longitudinal drainage grooves, combined with a composite material of nitrile rubber and silicon carbide particles, which greatly improves the anti-slip performance of the sole and quickly drains accumulated water, adapting to the wet and waterlogged ground environment at fire scenes and reducing the risk of slipping.

[0022] Good stability over a wide temperature range: The addition of nano-silica high-temperature resistant additives to the outsole enables the safety shoes to maintain structural stability in extreme temperature environments ranging from -30℃ to 200℃, without softening, deformation or cracking, adapting to the complex temperature conditions in firefighting operations.

[0023] Stable and comfortable to wear: The elastic cord of the anti-slip component can adjust the tightness of the shoe shaft to ensure that the shoe shaft fits the ankle and prevents the shoe shaft from slipping off during vigorous movements; the polyester fiber breathable layer and reasonable heel height and anti-slip bump size design take into account both wearing comfort and stability, reducing discomfort during long-term work.

[0024] Flame retardancy and breathability balance: The flame retardant canvas (limiting oxygen index ≥30%) and neoprene coating on the upper ensure excellent flame retardancy, while the inner polyester fiber breathable layer achieves good breathability, solving the problem of traditional fire boots being unable to balance flame retardancy and breathability.

[0025] Reliable toe protection: The built-in arc-shaped steel head (1.2-1.5mm thick) and the outer flame-retardant rubber layer can not only resist the impact and compression of heavy objects and protect the toes, but also improve the cushioning and flame-retardant effect, and enhance the overall protective performance. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of this utility model;

[0029] Figure 3 This is a schematic cross-sectional view of the sole structure of this utility model;

[0030] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0031] In the picture:

[0032] 1 - Shoe body, 2 - Shoe sole, 21 - Cushioning layer, 22 - Puncture-resistant layer, 23 - Outsole, 231 - Offset diamond anti-slip pattern, 232 - Longitudinal drainage groove, 3 - Toe, 4 - Heel, 5 - Anti-slip bumps, 6 - Anti-slip component, 61 - Inner cavity, 62 - Elastic cord. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] like Figure 1-4 As shown;

[0035] A type of safety shoe used for firefighting.

[0036] This implementation plan addresses the technical problems existing in the prior art, such as the shortcomings of commercially available fire safety shoes disclosed in the background section above: Firstly, they have poor cushioning performance, making it difficult to effectively absorb impact when firefighters move quickly or step on protruding objects, easily leading to foot fatigue or injury; secondly, they lack puncture resistance, failing to reliably prevent punctures from sharp objects such as steel bars and glass shards present at fire scenes, easily causing foot injuries; thirdly, their anti-slip and drainage performance is poor, as fire scenes are often accompanied by water accumulation and oil stains, and the existing safety shoes have unreasonable sole tread designs, easily causing slippage and slow drainage, further increasing operational risks; fourthly, they have a narrow high-temperature resistance range, making them unsuitable for fire scenes. The temperature fluctuations in the field are large. Some safety shoes are prone to deformation and softening in high-temperature environments, and brittleness in low-temperature environments, making it impossible to maintain stable structural performance. Fifth, the shoe top is prone to falling off. When firefighters are climbing, running, or engaging in other strenuous activities, the shoe top is prone to slipping off from the ankle, affecting the convenience of operation. Sixth, it is difficult to balance the flame retardancy and breathability of the shoe upper. Some shoe uppers use thick materials to ensure flame retardancy, resulting in poor breathability. Wearing them for a long time can make the feet feel hot and damp. Although some shoe uppers focus on breathability, their flame retardancy performance cannot meet the needs of firefighting operations. In view of practical use, this problem is obviously a real and difficult problem to solve. Therefore, in order to solve this technical problem, a fire safety shoe is provided.

[0037] Example 1

[0038] like Figure 1-4 As shown in the figure;

[0039] This embodiment provides a fire safety shoe, the specific structure of which is as follows:

[0040] The fire safety shoe includes a shoe body 1 and a sole 2, as well as an anti-slip component 6 installed at the shoe opening of the shoe body 1. The sole 2 consists of a cushioning layer 21, a puncture-resistant layer 22, and an outsole 23 from top to bottom. The three layers are integrally molded using a special pressing equipment at a temperature of 120℃-140℃ and a pressure of 5-8MPa for 30-40 minutes to ensure that the three layers are tightly connected and there is no risk of delamination or detachment.

[0041] The cushioning layer 21 is made of EVA foam material with a thickness of 2.5mm. This thickness ensures excellent cushioning performance without excessively increasing the overall thickness of the sole 2. The foaming ratio of the EVA foam material is controlled between 1.8 and 2.2 times to ensure a balance between elasticity and cushioning effect.

[0042] The puncture-resistant layer 22 is made of Kevlar fiber woven layer with an areal density of 135g / m². The fineness of the Kevlar fiber is 1000D, the weaving method is twill weave, and the weaving density is 20 strands / cm. Through tensile testing, the puncture-resistant layer 22 can withstand a puncture force of 550N, which fully meets the needs of fire fighting operations for protection against puncture by sharp objects.

[0043] Outsole 23 is made of a composite material of nitrile rubber and silicon carbide particles. The silicon carbide particles have a particle size of 0.8mm and account for 18% of the total mass. The nitrile rubber is a medium-acrylonitrile rubber with an acrylonitrile content of 33%-35%, which has excellent wear resistance and oil resistance. The staggered diamond-shaped anti-slip pattern 231 on the outer surface of outsole 23 has a depth of 1.8mm, a diamond side length of 8mm, and a staggered spacing of 4mm. The longitudinal drainage grooves 232 are 2mm wide and 1.5mm deep, with 6 grooves evenly distributed on the outer surface of outsole 23, and each groove 232 extends to the edge of the sole 2 at both ends. In addition, 6% by mass of nano-silica high-temperature resistant additive with a particle size of 50-80nm is added to outsole 23. This additive is thoroughly mixed with nitrile rubber and silicon carbide particles through high-speed stirring to ensure that outsole 23... It maintains structural stability in environments ranging from 30℃ to 200℃.

[0044] The upper of shoe body 1 is made of a composite structure of flame-retardant canvas and neoprene coating. The flame-retardant canvas has a limiting oxygen index of 32%, is made using a plain weave process, and has a thickness of 0.8mm. The neoprene coating has a thickness of 0.4mm and is evenly coated on the outer surface of the flame-retardant canvas using an adhesive coating device. It is then dried and cured at a temperature of 80℃-90℃ to ensure a tight bond between the coating and the canvas. The inner side of the upper is bonded with a 0.3mm thick polyester fiber breathable layer using a knitting process, which has good breathability and moisture absorption. After bonding, it is dried at a temperature of 50℃ to ensure a firm bond.

[0045] The toe cap features an internal curved steel toe box made of Q235 steel plate with a thickness of 1.3mm. It is stamped into a curved structure that conforms to the contour of the toes, and the edges of the steel toe box are rounded to prevent scratches to the feet. The steel toe box is wrapped with flame-retardant rubber with a thickness of 0.5mm. It is tightly bonded to the steel toe box using a vulcanization process. At the same time, the flame-retardant rubber is connected to the neoprene coating of the shoe upper with glue to ensure the integrity of the toe cap structure.

[0046] The heel 4 is 3.5cm high and is made of the same nitrile rubber and silicon carbide particle composite material as the outsole 23. It is connected to the outsole 23 through an integrated molding process. The outer side of the heel 4 is provided with anti-slip bumps 5. The anti-slip bumps 5 are made of the same material as the heel 4 and are integrally molded. The diameter of the anti-slip bumps 5 is 3mm, the height is 2mm, the spacing between adjacent bumps is 5mm, and the bumps are distributed in a matrix. The distribution range covers 1 / 2 of the outer area of ​​the heel 4 to ensure the anti-slip effect.

[0047] The anti-slip component 6 includes an inner cavity 61 located at the shoe shaft of the shoe body 1. The inner cavity 61 is formed by sewing together two layers of fabric from the upper. The width of the inner cavity 61 is 1cm, and its length is the same as the circumference of the shoe shaft. An elastic cord 62 is inserted inside the inner cavity 61. The elastic cord 62 is made of elastic fiber and has a diameter of 2mm. Both ends of the elastic cord 62 pass through pre-drilled holes on the side of the shoe shaft and are connected to plastic adjustment buckles. The tightness of the elastic cord 62 can be controlled by adjusting the buckles, thereby adjusting the fit of the shoe shaft.

[0048] In the production and assembly of the fire safety shoes of this embodiment, the cushioning layer 21, the puncture-resistant layer 22, and the outsole 23 are first made into the sole 2 through an integrated pressing process; then, the flame-retardant canvas of the upper is laminated with a neoprene coating and bonded with a polyester fiber breathable layer to form the upper structure of the shoe body 1; next, the arc-shaped steel toe cap is wrapped with flame-retardant rubber and embedded in the toe position 3, and then sewn and fixed to the upper; then, the heel 4 is integrally formed with the sole 2, and anti-slip protrusions 5 are processed on the outside of the heel 4; then, the upper and the sole 2 are fixedly connected by sewing and gluing to form a complete combination structure of the shoe body 1 and the sole 2; finally, an inner cavity 61 is sewn into the shoe shaft of the shoe body 1, elastic rope 62 is inserted and an adjustment buckle is installed to complete the assembly of the entire safety shoe.

[0049] In actual firefighting operations, when firefighters wear these safety shoes, they can adjust the elastic cord 62 of the anti-slip component 6 to ensure the shoe fits snugly against the ankle and prevent the shoe from slipping off. During operations, the cushioning layer 21 of the sole 2 absorbs impact, the puncture-resistant layer 22 resists punctures from sharp objects, the anti-slip pattern and drainage grooves of the outsole 23 deal with slippery surfaces, the high-temperature resistant additives adapt to extreme temperatures, the flame-retardant structure of the upper resists flames, the breathable layer keeps the feet dry, the steel toe cap 3 protects the toes, and the anti-slip protrusions 5 of the heel 4 enhance stability. All these structures work together to provide comprehensive and reliable protection for the feet of firefighters.

[0050] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fire safety shoe, comprising a shoe body (1) and a sole (2), and an anti-slip component (6) disposed at the shoe opening of the shoe body (1), characterized in that: The sole (2) consists of a cushioning layer (21), a puncture-resistant layer (22), and an outsole (23) from top to bottom, all three layers being integrally pressed and molded. The buffer layer (21) is made of EVA foam material with a thickness of 2-3 mm; The puncture-resistant layer (22) is a Kevlar fiber braided layer with a surface density of 120-150 g / m². The outer surface of the outsole (23) is provided with staggered diamond anti-slip texture (231) and longitudinal drainage groove (232). The inner side of the shoe body (1) is covered with a polyester fiber breathable layer, the toe (3) has an internal arc-shaped steel toe cap, and the outer side of the heel (4) is provided with anti-slip protrusions (5). The anti-slip component (6) includes an inner cavity (61) disposed at the shoe body (1) shoe barrel, and an elastic cord (62) is inserted inside the inner cavity (61).

2. The fire safety shoe according to claim 1, characterized in that: The depth of the staggered diamond anti-slip pattern (231) is 1.5-2mm, the longitudinal drainage groove (232) is 2mm wide and 1.5mm deep, and the two ends of the drainage groove (232) extend to the edge of the sole (2).

3. A fire safety shoe according to claim 1, characterized in that: The puncture-resistant layer (22) is made of Kevlar fiber in a twill weave, which can withstand a puncture force of ≥500N.

4. A fire safety shoe according to claim 1, characterized in that: The arc-shaped steel toe cap of the shoe toe (3) has a thickness of 1.2-1.5mm, and the steel toe cap is wrapped with flame-retardant rubber.

5. A fire safety shoe according to claim 1, characterized in that: The heel (4) is 3-4cm high, the anti-slip protrusions (5) are 3mm in diameter, and the distance between adjacent protrusions is 5mm.

6. A fire safety shoe according to claim 1, characterized in that: The upper of the shoe has a flame-retardant canvas with a limiting oxygen index of ≥30% and a neoprene coating thickness of 0.3-0.5mm.

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