KR20140104270A

KR20140104270A - Toe cap

Info

Publication number: KR20140104270A
Application number: KR1020130018255A
Authority: KR
Inventors: 윤정수; 손태원
Original assignee: 주식회사 디에이이에스산업
Priority date: 2013-02-20
Filing date: 2013-02-20
Publication date: 2014-08-28

Abstract

The present invention discloses a toe cap sheet and a toe cap manufactured by the same. According to an embodiment of the present invention, the toe cap is formed with a plurality of high-strength fiber sheets. Therefore, the toe cap can have sufficient load carrying capacity and anti-shock properties while having light weight, and can be prevented from being penetrated by a sharp object.

Description

TOCAP {TOE CAP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toe cap made of a toe-cap sheet and a toe-cap sheet, and more particularly to a toe-cap sheet made of a high-strength sheath and a toe cap made of the toe-

The safety is generally provided with a toe cap to protect the toe portion. The toe cap, which is equipped for safety, covers the front part of the toe or foot at the work site and protects the front part of the toe or foot when the heavy object falls or collides with a sharp object.

It is known that such a toe cap must be able to withstand a load of 1,100 kg in safety regulations and withstand the impact imposed by a 23 kg weight falling at a height of 46 cm. Therefore, the toe cap is manufactured so as to have the structural strength satisfying the above-mentioned safety regulations, and a relatively low-priced metal material is generally used, and as a technology therefor, Korean Patent Publication No. 2001-0091146 ., Published by K.K.

However, since the weight of the metal toe cap is heavy, the weight of the shoe having the toe cap is increased, so that the mobility of the wearer is lowered and the fatigue of the muscle can be caused. Since the metal toe cap has a high thermal conductivity, the heat outside the shoe may be transmitted to the wearer's foot in a high temperature environment such as a furnace or a low temperature environment such as an outdoor workplace in winter, resulting in a significant decrease in wearing comfort.

When the toe cap is deformed by the weight or the weight is dropped, the toe cap is deformed until the toe cap is disassembled. As the front part of the foot continues to be stuck, a larger injury may result.

In order to overcome these disadvantages, a technique of using synthetic resin as a material of the toe cap has been proposed in the Utility Model No. 20411469 of Korea Register (March 15, 2006), but in order to obtain the structural strength satisfying the safety regulations, The size of the shoe having the toe cap is increased and the wearing feeling is lowered.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a toe cap which is made of a high strength yarn sheet having excellent tensile strength and modulus of elasticity so as to be able to withstand high load and strong impact while reducing its weight, The purpose is to provide.

Other objects of the present invention will become readily apparent from the following description of the embodiments.

According to the present invention, there is provided a sheet processing apparatus comprising: a first high-strength yarn sheet; And a second high-strength yarn sheet laminated on one surface of the first high-strength yarn sheet, wherein at least two high-strength yarn sheets are laminated and joined to form a toe-cap sheet having a shape of a toe-cap, And at least one high-strength yarn sheet formed by superimposing historical yarn pieces.

Further, the present invention provides a sheet processing apparatus comprising: a first high-strength yarn sheet; And a second high-strength yarn sheet laminated on one surface of the first high-strength yarn sheet, wherein at least two high-strength yarn sheets are laminated and joined to form a toe-cap sheet, Wherein at least one high-strength yarn sheet is folded or curved so as to wrap an end of at least one other high-strength yarn sheet.

The first high-strength yarn sheet and the second high-strength yarn sheet may be formed by weaving or knitting a high-strength yarn. Here, the first high strength yarn sheet may be an aramid fiber sheet. The second high strength yarn sheet may include aramid fibers, PBO fibers, polyarylate fibers, ultra high molecular weight poly ethylene (UHMWPE) fibers, carbon fibers, nylon fibers, , Or a mixture of two or more fibers selected from the above group.

The at least two high-strength yarn sheets may be bonded to each other by thermal fusion or may be bonded to each other by an adhesive.

The first high strength yarn sheet and the second high strength yarn sheet may be prepregs. Here, the first high-strength yarn sheet and the second high-strength yarn sheet may be unidirectional prepregs. At this time, it is preferable that the fiber arrangement direction of the first high strength yarn sheet and the fiber arrangement direction of the second high strength yarn sheet cross each other.

On the other hand, the first high-strength yarn sheet or the second high-strength yarn sheet may have many bends.

Further, the present invention provides a toe cap, which is coupled to a shoe to cover a toe portion, and which is made of the toe-cap sheet.

The toe cap may be manufactured by heating the toe-cap sheet to thermoform the toe cap to have the shape of the toe-cap, placing the toe-cap sheet in a mold having the shape of the toe-cap, injecting molten resin and performing injection molding.

The toe cap may be configured to be coupled to the inside of the front of the shoe, cover the front outside of the shoe, or cover the front of the shoe in which the toe part is cut.

According to the embodiment of the present invention, since the toe cap is made of a high-strength yarn sheet, it can have a light weight, sufficient load-bearing property and impact resistance, and can be prevented from being penetrated by a sharp object.

In addition, the toe cap according to an embodiment of the present invention is effective in suppressing the occurrence of deformation due to an external load, preventing breakage, and restoring molding.

Also, the toe cap according to an embodiment of the present invention is easier to assemble and form compared to a metal toe cap, thereby lowering the production cost and improving the production efficiency.

According to the toe cap of the present invention, at least one of the high-strength yarn sheets constituting the toe-cap sheet is made of a high-strength yarn sheet composed of high-strength yarn sheet pieces, The strength is improved.

According to the toe cap according to the embodiment of the present invention, at least one of the high-strength yarn sheets constituting the toe-cap sheet is folded or curved so as to surround the ends of at least one other high-strength yarn sheet, The strength is improved as compared with a toe-cap sheet having the same thickness in which the high-strength-strength sheets are laminated.

1 is a view illustrating a shoe having a toe cap according to an embodiment of the present invention;
Fig. 2 is an enlarged view of a portion A shown in Fig. 1
3 to 6 are views illustrating a method of combining modified examples of a toe cap according to an embodiment of the present invention with a sole;
7 is a cross-sectional view of the toe cap according to B-B 'shown in Fig. 4
8 is a view showing a modified example of the cross section of the toe cap shown in Fig. 7
9 is an enlarged view of a portion C shown in Fig.
10 to 13 are views showing an example in which the toe cap according to the present invention is coupled to the shoe

14 is a cross-sectional view of the toe cap according to D-D 'shown in Fig. 4
15 is a view for explaining a toe cap manufacturing method according to an embodiment of the present invention;
16 to 19 are views for explaining embodiments of the toe-cap sheet used for manufacturing the toe cap according to the present invention
20 is a view for explaining a modification of the toe cap seat constituting the toe cap according to the embodiment of the present invention
21 is an enlarged view illustrating the structure of the toe-cap sheet applied to the embodiments of the present invention
22 is a view for explaining another embodiment of the toe-cap sheet constituting the toe cap according to the embodiment of the present invention
23 is a vertical sectional view of the state where the toe-cap sheets of Fig. 22 are laminated
24 and 25 are views for explaining a modified example of the toe-cap sheet of Fig. 22
26 is a view for explaining another embodiment of the toe cap seat constituting the toe cap according to the embodiment of the present invention
27 is a vertical sectional view of the state where the toe-cap sheets of Fig. 26 are laminated
28 and 29 are views for explaining a modified example of the toe cap sheet of Fig. 27

The present invention is capable of various modifications and various embodiments, and particular embodiments are illustrated and described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a shoe having a toe cap according to an embodiment of the present invention.

1, a shoe 100 having a toe cap according to an embodiment of the present invention includes a shoe body 110 covering a foot, a shoe 120 coupled to a lower side of the shoe body 110, And a toe cap 130 disposed on the inside of the front part of the body 110 to cover the toe part and the front part of the foot. The size of the toe cap 130 may be increased or decreased as necessary, and the shape of the toe cap 130 may be changed according to the shape of the shoe 100 having the toe cap.

Fig. 2 is an enlarged view of a portion A shown in Fig.

2, the toe cap 130 may be disposed between the outer skin 111 and the inner skin 112 of the shoe main body 110. That is, the outer shell 111 may be coupled to the outer surface and the inner shell 112 may be coupled to the inner surface so that the toe cap 130 is not seen from the outside or directly contacted with the feet. In addition, the toe cap 130 can be coupled to the shoe body 110 in a variety of configurations, which will be described below with reference to Figures 10-13.

3 to 6 show a toe cap according to an embodiment of the present invention and modifications thereof combined with the shoe sole.

3, the toe cap 130 according to an embodiment of the present invention includes a toe cap body 131 for protecting the feet and a plurality of coupling protrusions for coupling the toe cap body 131 to the sole 120 133). The sole 120 may have a coupling groove 123 into which a plurality of coupling projections 133 are inserted.

The toe cap 130 can be more firmly coupled to the sole 120 and the toe cap 130 can be coupled to the sole 120 at a constant position The quality of the standard such as the standard can be kept constant when the shoe 100 having the toe cap is manufactured.

4, a toe cap body 231 may be included in the toe cap 230 according to an embodiment of the present invention. At the end of the toe cap body 231 in contact with the sole 120, Can be formed.

The coupling rib 232 is attached or sewn to the sole 120 so that the toe cap main body 231 and the sole 120 are coupled to each other so that the coupling rib 232 and the sole 120 are in surface contact with each other, And the sole 120 can be more firmly coupled. When the engaging ribs 232 are sewn on the sole 120, various kinds of sewing thread such as cotton yarn, simulated yarn, silk yarn, chemical fiber yarn and blended yarn can be used.

The thinner the thickness t1 of the toe cap body 231, the better the comfort of the shoe 100 with the toe cap. However, if the thickness t1 is too thin, the strength of the toe cap body 231 may be reduced. Accordingly, the toe cap body 231 may be formed to have a strength that satisfies the safety specification, but has a minimum thickness t1, and the toe cap body 231 according to an embodiment of the present invention may have a thickness of 1.3 to 7 mm (t1).

Referring to FIG. 5, a coupling rib 232 'may be formed on the toe cap body 231 included in the toe cap 230 according to an embodiment of the present invention. In addition, the boundary between the toe cap main body 231 and the engagement rib 232 'may be formed to have a curved shape as shown in the figure. This is because when the toccap body 231 is suddenly angled, such as bent between the toe cap body 231 and the engaging rib 232 ', stress may be concentrated on the toe body 231 when an external force is applied thereto Because. Accordingly, the structural strength of the toe cap body 231 can be improved by preventing stress from concentrating on a specific portion between the toe cap body 231 and the engagement rib 232 '. The sole 120 is formed with a seating groove 122 having a shape corresponding to the engaging rib 232 'so that the toe cap body 231 can be easily seated in the sole 120.

6, the toe cap body 331 included in the toe cap 330 according to an embodiment of the present invention covers the lower side of the toe contact portion 331 in contact with the sole 120, that is, The bottom surface 333 can be formed. The bottom surface 333 can prevent the object from protruding to the soles of the foot through the sole 120 when the user touches a sharp object such as a nail during walking and has a large contact area with the sole 120, And can be very firmly engaged with the sole 120 by a sewing method.

The thickness t2 of the bottom surface 333 can be varied as required. When the toe cap 330 is applied to a shoe used in an environment where a large number of sharp objects such as nails are present on the floor surface It may be formed sufficiently thick.

FIG. 7 is a cross-sectional view of the toe cap shown in FIG. 4B-B ', FIG. 8 is a modification of the toe cap of FIG. 7, and FIG.

4 and 7, the toe cap body 231 included in the toe cap 230 may have a dome shape so that the toe portion of the shoe wearer can be received therein.

Since the impact that can be applied to the toe cap 230 is generally directed from the outside to the inside of the shoe 100 having the toe cap 230, It is advantageous that the strength against the external force directed toward the outer side is high. 8 and 9, in order to improve the strength against the external force directed from the outside to the inside, the inner surface of the toe cap body 431 included in the toe cap 430 is formed with concavo- A portion 435 can be formed.

Here, the shape of the concave and convex portion 435 may be variously formed, and includes a range that can be easily modified by those skilled in the art, such as a square, a triangle, a circle, a latch, a zigzag, and an arrowhead. However, as described above, when stress is concentrated on a specific portion of the toe cap body 431 due to an external force applied to the toe cap body 431, the strength of the toe cap body 431 may be rather weak, It is effective that the portion 435 does not have a tip portion toward the outer surface of the toe cap body 431. [

The uneven portion 435 is formed on the inner surface of the toe cap body 431 by forming a plurality of unevenness on the outer surface of the metal mold 90 or pressing it with a separate jig A method of removing a part of the high strength yarn sheet (not shown) or the like bonded to the inside of the toe cap body 431, or a method of severally weaving a part of a plurality of laminated sheets may be used.

10 to 13 are views showing an example in which the toe cap according to the present invention is coupled to the shoe.

Referring to FIG. 10, another embodiment of a shoe having a toe cap according to the present invention may include a body 210 and a sole 120 that cover the foot.

The toe cap 213 may be integrally formed with the main body 210. The toe cap 213 may be formed at a position to cover the toe portion of the wearer and the front portion of the foot. The shoe having the toe cap can be completed by joining the sole 120 to the main body 210 as required.

In an environment where pollutants need to be blocked from flowing into the main body 210, such as a nuclear power plant, the main body 210 and the toe cap 213 are integrally formed with the toe cap according to another embodiment of the present invention It is possible to obtain an effect of increasing airtightness. In addition, since the main body 210 and the toe cap 213 are integrally formed, an effect of improving the appearance can be obtained.

11, another embodiment of a shoe having a toe cap includes a shoe main body 310 having a cut shape of a toe portion and a toe cap 313 coupled to cover a cut portion of a toe portion of the shoe main body 310 . The toe cap 313 may be manufactured by the method of manufacturing the toe cap according to the embodiment of the present invention described above and the shoe body 310 and the toe cap 313 may be joined by a method such as adhesion, fusion and sewing.

Although not shown, the bonding by the adhesive is such that the shoe main body 310 and the toe cap 313 are bonded by an adhesive. The fusion may be performed by inserting a resin or the like between the shoe main body 310 and the toe cap 313 and then heating and pressing or applying ultrasonic waves to partially or completely melt the resin, Lt; / RTI > Sewing means sewing so that the shoe main body 310 and the toe cap 313 are joined using a sewing thread.

Since the toe cap 313 is produced separately from the shoe body 310 and then combined, the toe cap 313 can be easily produced, so that the shoe having the toe cap according to another embodiment of the present invention can be obtained. So that the effect of facilitating standardization can be obtained.

In addition, if necessary, only the portion of the toe cap 313 can be replaced and coupled to the shoe main body 310, so that the effect of saving resources can be obtained. Also, the toe cap having the appropriate strength or shape The shoes 313 can be selected and joined to the shoe main body 310, so that it is possible to produce a shoe having a variety of toe caps.

Referring to Fig. 12, another embodiment of the shoe 1 having the toe cap may include the main body 2 and the sole 3. Fig. At this time, the shoe 1 is generally used, and the toe cap 410 according to another embodiment of the present invention is coupled to the shoe so that the shoe having the toe cap can be made. That is, the toe cap body 413 may be included in the toe cap 410. The toe cap body 413 covers the front portion of the body 2 and the sole 3 of the shoe 1, that is, The weight of the shoe 1 with the toe cap 410 coupled thereto can be minimized while the generally stable toe cap 410 is provided in the general shoe 1 as well. The shoe 1 and the toe cap 410 may be joined by bonding, welding, sewing, or the like, which are the same as those described above, and thus duplicate descriptions are omitted.

Referring to FIG. 13, in another embodiment of the shoe 1 having a toe cap, a toe cap 510 may be coupled. Here, since the shoe 1 is as described above, the overlapping description will be omitted. However, the toe cap 510 only covers the toe portion of the toe portion. This can be used when the bottom of the place where the toe-cap shoes 1 are to be used is slippery, or when there is a relatively small amount of dangerous material on the floor, and the toe cap 510 is miniaturized, And the toe cap 510 can be easily produced. The coupling of the toe cap 510 and the main body 2 may be performed by a method such as adhesion, fusion, and sewing, which are the same as those described above, and thus duplicate descriptions are omitted.

In the shoe 1 having the toe cap shown in Figs. 12 and 13, the toe caps 410 and 510 can be coupled to cover the front outer side of the shoe. Therefore, even when the toe caps 410 and 510 are not disposed in the shoe 1 due to the strength superior to that of the conventional toe cap, a sufficient protection effect of the toe portion can be obtained.

Fig. 14 is a cross-sectional view of the toe cap according to D-D 'shown in Fig. 14, the plurality of high-strength yarn sheets 10 constituting the toe cap main body 231 included in the toe cap 230 form an inner side surface of the toe cap body 231, As shown in Fig. That is, the edge of the toe cap body 231, which is in contact with the wearer's foot, becomes gradually thinner toward the end, so that the fit feeling is improved while securing the thickness so that the toe cap body 231 has sufficient strength . In addition, the high-strength yarn fiber and the general-purpose plastic may be mixed to form a foam or a cotton-like sheet and attached to one surface or the other surface of the toe cap to impart impact absorption, insulation, and heat insulation.

Next, the toe cap sheet used for manufacturing the toe cap according to the present invention will be described. 15 to 20 show various embodiments of the toccap according to the present invention.

15 to 20, the toe-cap sheet 20 according to the present invention may include at least two high-strength yarn sheets to be laminated. Here, the high-strength yarn sheet may be one in which the high-strength yarn is woven or knitted. Further, the high-strength yarn sheet may be a prepreg.

A method of manufacturing a toe-cap sheet according to the present invention includes the steps of: providing a plurality of high-strength yarn sheets; laminating the plurality of high-strength yarn sheets; laminating the plurality of high- A combining step may be included.

The step of forming may include an operation of weaving or knitting a high-strength yarn to form a high-strength yarn sheet. Further, the providing step may include a step of manufacturing the unidirectional prepreg or the cross prepreg. After the step of providing the high-strength yarn sheet by such an arranging step, a lamination step of laminating a plurality of high-strength yarn sheets can be performed.

The high strength yarn sheet used in the present invention may be one in which the high strength yarn is woven or knitted. Here, weaving refers to forming a high-strength yarn in a plain weave, a twill weave, a satin weave, and a method of applying them, and knitting is performed by using a single high- .

In addition, the high strength yarn sheet used in the present invention may be a prepreg. Prepreg refers to a fiber reinforced resin composite impregnated with a matrix resin and then semi-hardened to a high strength yarn. The prepreg is lightweight and has excellent mechanical properties. Here, the prepreg used in the present invention includes both a unidirectional prepreg (UD Prepreg) and a cross prepreg. Further, the prepreg may be a high-strength yarn sheet in which a high-strength yarn is woven or knitted into a prepreg.

The high tenacity yarn used in the high strength yarn sheet according to the present invention includes aramid fibers, PBO fibers, polyarylate fibers, UHMWPE (ultra high molecular weight polyethylene) fibers, carbon fibers, nylon fibers, And one or more fibers selected from glass fibers.

The high tenacity yarn can be blended with two or more fibers selected from aramid fiber, PBO fiber, polyarylate fiber, UHMWPE fiber, carbon fiber, nylon fiber, basalt fiber, ceramic fiber and glass fiber.

Alternatively, the high tenacity yarn may comprise one or more fibers selected from aramid fibers, PBO fibers, polyarylate fibers, UHMWPE fibers, carbon fibers, nylon fibers, barzat fibers, ceramic fibers and glass fibers, Polypropylene fibers, polyethylene fibers, polyester fibers, acrylic fibers and rayon fibers.

High strength yarns are used in a wide range of applications ranging from sporting goods such as bags and tent sleeping bags to fishing nets, ropes, cables, ropes, belts, coated fabrics, medical equipment and automotive structures in the automotive industry, airbags, tire cords, .

High molecular weight chains have a very long molecular chain length, which in turn increases tensile strength.

For reference, the representative materials of high-strength history mentioned above are briefly described below.

An aramid fiber refers to an aromatic polyamide fiber, which is divided into a linear structure of a benzene nucleus which is a structural skeleton (para system) and a non-linear system (meta system). Para-aramid fibers have excellent properties such as high strength, high modulus of elasticity and low shrinkage. They are used in tire cord and aerospace field, and meta-aramid fiber has the greatest heat resistance and is used in fireproof clothing and filter bags for high-temperature dust collection.

PBO fibers are marketed under the trade name Zylon and have excellent properties such as ultra high strength, high elastic modulus, thermal stability and low shrinkage, and are used in the aerospace field.

The polyarylate fiber has an ultra-high strength and is excellent in vibration damping property, shock absorbing property and abrasion resistance. Particularly, since it has no hygroscopicity, it hardly changes in properties due to moisture and has high strength at low temperature and excellent heat resistance. Therefore, it is used in aerospace industry.

UHMWPE fiber refers to ultrahigh molecular weight polyethylene fibers, has flexibility, wear resistance and low friction. The mechanical strength is comparable to other high strength yarns, but it is advantageous in that it has a high modulus of elasticity, good pressure resistance, strong resistance to moisture, and low impact resistance at low temperatures.

Carbon fiber refers to a fiber that is carbonized and crystallized by heat treating an organic fiber in an inert gas at an appropriate temperature. The fiber is excellent in mechanical properties such as high strength and high rigidity made of carbon on graphite. At present, it is generally manufactured by a method of carbonizing an acrylic fiber or the like as a raw material at an inert state in which chemical reaction such as oxidation does not occur at 1,000 to 1,500 degrees centigrade. Taking advantage of its high strength and high rigidity, it is highly valuable as reinforcing fibers for composites materials, especially plastic materials. Carbon fiber reinforced plastic is used as a reinforcing agent. It is used for sporting goods such as golf shaft, tennis racket, etc. It has excellent heat resistance and is also used as material of surface of space shuttle.

The nylon fiber is a polyamide-based fiber and refers to a polyamide-based synthetic fiber. It is thinner than webs, strong in friction and tensile strength better than ordinary fibers. It is lighter than wool, it does not change its strength even when wet, it also has resilience and warmth. It is widely used not only for clothing but also for industrial purposes. Wooly nylon twisted by heat treatment, crepe nylon, and many other processing methods, the elasticity and the touch like wool are obtained by the appearance of nylon which is good in elasticity and bulky, and the use is also expanding because of its absorbency.

However, in the case of mixing nylon fibers to produce high-strength yarn sheets, nylon fibers can be mixed and limited to a range of 5 to 60 percent considering that the cost is lower than that of other high-strength yarns but the strength is weak And preferably in the range of 15 to 40 percent, so that the necessary strength can be ensured while lowering the manufacturing cost.

Basalt fiber refers to basalt glass fiber, which is produced by melting basalt in a high temperature of 1000 degrees Celsius or higher and then melt-spinning. The ceramic fiber is composed of ceramics such as alumina, silicon carbide, and carbon nitride, and has high strength and high modulus of elasticity. Compared with conventional glass fiber, E-glass, it has better characteristics at higher temperatures and is also used as a bullet proof material.

Glass fiber refers to a fiber made of glass with a thickness of a few thousand millimeters by stretching a melted glass or blowing it with a blowing gas. It has heat resistance and insulation properties and is used for manufacturing of reinforced plastic, coating of special electric wire, And so on. The glass fiber is resistant to high temperature and does not burn, is not absorbent, has high electrical insulation, low hygroscopicity, and is chemically durable, so that it is not corroded.

However, in the case of mixing glass fibers to produce a high-strength yarn sheet, glass fibers may be limited to a range of 5 to 60 percent in view of the fact that the cost is lower than that of other high-strength yarns, And preferably in the range of 15 to 40 percent, so that the necessary strength can be ensured while lowering the manufacturing cost.

The strength of the high strength yarn used in the production of the high strength yarn sheet according to the present invention is preferably 6 to 70 cN / dtex, more preferably 20 to 55 cN / dtex. When the strength of the high-strength yarn is less than 6 cN / dtex, there may be a disadvantage that the high-strength yarn sheet must be excessively laminated in order to provide the strength required for the high-strength yarn sheet. In addition, the higher the strength of the high-strength yarn, the better the strength of the high-strength yarn sheet. However, if the strength of the high-strength yarn exceeds a certain level, the cost of the high-strength yarn is excessively high. Can be.

In addition to the above-mentioned materials and strength required for typical high strength yarns, various materials can be used as materials for high strength yarns used in the embodiments of the present invention.

Hereinafter, concrete examples of forming a toe-cap sheet by stacking a plurality of high-strength yarn sheets will be described.

15, the toe-cap sheet 20 according to the first embodiment of the present invention includes a first high-strength yarn sheet 10 and a second high-strength yarn 10 laminated on an upper surface and a lower surface of the first high- Sheets 70a, 70b. Here, the first high tenacity yarn sheet 10 and the second high tenacity yarn sheets 70a and 70b may be a high-strength yarn sheet made of the same type of high-strength yarn sheet or a high-strength yarn sheet made of different kinds of high- . The first high tenacity yarn sheet 10 may be an aramid fiber sheet made of aramid fibers. At present, since the aramid fiber is woven from the aramid fiber, it is advantageous in that the production cost of the topcap sheet can be lowered when the first high tenacity yarn sheet 10 is an aramid fiber sheet. In addition, the aramid fiber is light and stiff in nature of the fiber itself, so that it can withstand even strong pressure or penetration of a sharp object on the stabilizer. However, the material of the first high-strength yarn sheet 10 is not limited thereto, and the high-strength yarn sheet of various materials described above can be used. Further, the second high-strength yarn sheets 70a and 70b may be aramid fiber sheets or any other kind of high-strength yarn sheets.

In addition, when the second high-strength yarn sheets 70a and 70b are laminated on the upper and lower portions of the first high-strength yarn sheet 10, they can withstand external impacts and ensure heat resistance. Preferably, the second high tenacity yarn sheets 70a and 70b are made of a fiber sheet made of any one of aramid fiber, UHMWPE fiber, carbon fiber, xylon fiber, ceramic fiber, nylon fiber, Lt; / RTI > Also, a method of manufacturing high-strength fibers at a predetermined thickness or more and weaving a high-strength fiber having a predetermined thickness or more into a honeycomb shape can be applied. Due to the nature of the structure, the honeycomb-like high-strength yarn sheet has a relatively superior effect on the impact or pressure to the outside than a triangular, square or circular structure. On the other hand, in the case of mixing nylon fibers, the nylon fibers may be limited to a range of 5 to 60%, preferably 15 to 40%, in view of the fact that the cost of the nylon fibers is lower than that of other high- %, So that the manufacturing cost can be reduced and the strength of the toe cap can be secured.

16, the toe-cap sheet 20 according to the second embodiment of the present invention includes a plurality of first high-strength yarn sheets 10a and 10b to be laminated and a second high-strength yarn sheet 70 laminated at the upper end, . At this time, the first high tenacity yarn sheets 10a and 10b may be aramid fiber sheets. It is preferable that the second high strength yarn sheet 70 is a high strength yarn sheet having higher strength than the first high strength yarn sheets 10a and 10b. According to such a configuration, the toam sheet of high strength, high elasticity, and high heat resistance can be realized due to the self-properties of the aramid fiber. The second high strength yarn sheet 70 made of a material having higher abrasion resistance than the aramid fiber sheet, such as polyarylate, forms the outer surface of the toe cap 130 (see FIG. 3), thereby improving the abrasion resistance of the toe cap 130 Can be obtained.

17, the toe-cap sheet 20 according to the third embodiment of the present invention includes a plurality of first high-strength yarn sheets 10a, 10b and a plurality of second high-strength yarn sheets 70a, 70b, and 70c. The first high tenacity yarn sheets 10a and 10b may be aramid fiber sheets. The number of the first high tenacity yarn sheets 10a, 10b and the second high tenacity yarn sheets 70a, 70b, 70c can be increased or decreased according to the thickness and required strength of the tokap sheet.

Referring to FIG. 18, the toe-cap sheet 20 according to the fourth embodiment of the present invention may include at least two prepregs 30a, 30b, and 30c stacked. In the present embodiment, the prepregs 30a, 30b, and 30c are shown as unidirectional prepregs, but they may also be cross-prepregs. When the prepregs 30a, 30b, and 30c are unidirectional prepregs, the fiber arranging directions of the stacked prepregs 30a, 30b, and 30c may be alternated or parallel to each other. When the direction of fiber arrangement of the prepregs 30a, 30b, and 30c intersects with each other, it is preferable that the directions of fibers of the prepregs 30a, 30b, and 30c are conformal. For example, when the toffee sheet 20 includes two prepregs, it is preferable that the prepregs are arranged so that the arrangement direction of the fibers is 90 degrees. As shown in Fig. 18, when three pieces of prepregs 30a, 30b, and 30c are included in the tobacco sheet 20, the prepregs 30a, 30b, 45 degrees or 90 degrees. The laminated prepregs 30a, 30b, and 30c may be integrally joined by being heated and / or pressed to harden the resin.

Referring to FIG. 19, the toe-cap sheet 20 according to the fifth embodiment of the present invention may be constructed by stacking ultra-high molecular weight PE fiber sheets 40 on the upper surface of the general-purpose plastic 50. A shape of a toe cap is formed of a general-purpose plastic 50 such as nylon, PP, PET, ABS and PVC which is relatively less expensive than a high-strength yarn, and an ultra-high molecular weight PE fiber sheet 40 is laminated on top of the general- A toe-cap sheet can be constituted. Further, instead of the ultrahigh molecular weight PE fiber sheet 40, an aramid fiber sheet or any other high strength yarn sheet may be laminated on top of the general-purpose plastic 50.

Meanwhile, although not shown, the toe-cap sheet according to the present invention may be a combination of a general synthetic resin sheet and a high-strength yarn sheet to reduce manufacturing costs. The general synthetic resin is a general purpose resin including PE, PP, PS, ABS, PVC, PA, PET, urethane or the like, or a mixture of two or more of them, .

Fig. 20 shows a modification of the toe-cap sheet 20 shown in Fig. Referring to FIG. 20, in the toe-cap sheet 20 shown in FIG. 15, the first high-strength yarn sheet 10 laminated in the center may be formed to have a plurality of bends. When the first high-strength yarn sheet laminated in the middle has a curved shape, an appropriate thickness is given between the upper and lower second high-strength yarn sheets 70a and 70b, and an air layer is formed to improve the heat insulating effect . Further, the overall structural force of the toe-cap sheet 20 is increased. Further, a plurality of high strength yarn sheets 10, 70a, 70b can be easily laminated at the time of lamination.

The shape and the direction of the concavities and convexities formed on the first high strength yarn sheet 10 can be variously modified in the form of a sine wave, a square wave, a zigzag, or the like. In addition, the second high-strength yarn sheets 70a and 70b may not be laminated on either the upper surface or the lower surface of the first high-strength yarn sheet 10 on which the unevenness is formed. Further, any or all of the second high-strength yarn sheets 70a and 70b stacked on both sides of the first high-strength yarn sheet 10 positioned at the center may have a curvature.

21 is an enlarged view illustrating the structure of a high-strength yarn sheet applied to embodiments of the present invention. Referring to FIG. 21, the high-strength yarn sheet used in the embodiments of the present invention may have various functions by mixing various materials. For example, when a high-strength yarn 15, a nylon yarn 55, a polyethylene yarn 25, and a metal yarn 35 are mixed and used as shown in the figure, a high strength yarn 15 can obtain high strength The nylon yarn 55 and the polyether yarn 25 provide an effect of facilitating the heat fusion, and the effect of improving the formability through the metal yarn 35 can be obtained. Therefore, in the case of manufacturing the toe cap (see 130 in FIG. 1) and the toe cap according to the embodiments of the present invention by using the high-strength yarn sheet 99 produced by blending in this manner, The yield can be improved and the process can be simplified.

15, the laminating step may be performed so as to be directly laminated on the outer surface of the mold 90. [ At this time, by making the mold 90 have the shape of the toe cap (refer to 130 in FIG. 1) to be manufactured, the operation of making the plurality of stacked sheets to have the shape of the toe cap can be omitted. However, unlike the above, the process of forming the toe-cap sheet and molding the toe cap using the toe-cap sheet as in the case of forming the finished toe-cap sheet into the shape of the toe-cap after completing the toe-cap sheet using a plurality of high- .

In the method of manufacturing a toe cap according to an embodiment of the present invention, after the above-described lamination step, a plurality of stacked high-strength yarn sheets may be joined together.

The joining step may be such that a plurality of sheets stacked in the laminating step are bonded, fused, sewn, or mechanically joined by bending formed in the high strength yarn sheet as described with reference to Fig. 20 have.

When a plurality of high strength yarn sheets are bonded by adhesion, an adhesive may be applied to one or both surfaces of the high strength yarn sheets prior to the step of laminating these sheets. Alternatively, the plurality of sheets laminated in the lamination step may be impregnated with an adhesive or a curing agent. Thereafter, the bonding step can be performed by pressing the plurality of stacked sheets until the adhesive is cured, or by pressing and heating so that the adhesive is cured.

A liquid adhesive or curing agent can be easily impregnated or absorbed into the high strength yarn sheet. After the adhesive is sufficiently impregnated or absorbed, the laminated high-strength yarn sheet is heated, pressed, or pressurized to naturally dry on one side or both sides thereof, or hot air is applied or cooled to quickly dry A coupling step can be performed.

On the other hand, the bonding step can be performed by a sewing method. That is, the combining step can be performed by causing the plurality of sheets stacked in the stacking step to be sewn by the sewing thread. At this time, various kinds of sewing thread such as cotton yarn, simulated yarn, silk yarn, marble yarn, chemical fiber yarn and blended yarn can be used.

When the connection of the toe-cap sheet is completed, a molding step of molding the toe-cap sheet into the shape of the toe-cap (see 130 in Fig. 1) can be performed.

In the forming step, thermoforming is performed by applying heat to the sheets bonded to each other through the bonding step so as to make the bonded sheets flexible and then pressing the sheets together with the toe-cap shaped metal mold. Alternatively, A method in which the molten resin is dispensed and then impregnated with an adhesive or a viscous resin may be used. In this case, when the through-hole is formed in the toe-cap in the process of forming the toe-cap sheet into the shape of the toe-cap, the toe cap may have air permeability. Of course, when a high-strength yarn is woven in a process of forming a high-strength yarn sheet, the toe cap may have air permeability even if a separate hole is not formed in the toe cap.

As the adhesive or sticky resin, those containing a polyethylenic resin, a polyvinyl chloride resin, an epoxy resin, a silicone resin, a polyester resin, a polyamide resin, a phenol resin or the like may be used.

For reference, when the stacking step of the high-strength yarn sheets is performed on the outer surface of the mold 90 as described above, the forming step may be omitted.

Meanwhile, the toe cap according to the present invention is not limited to safety, but can be applied to various types of shoes such as ballet shoes, soccer shoes, hiking shoes, or ski shoes to reinforce the toes of shoes.

22 shows another embodiment of the toe-cap sheet constituting the toe-cap according to the embodiment of the present invention. Fig. 23 is a vertical sectional view of the toe-cap sheet in Fig. 22 are shown.

Referring to Fig. 22, the toe-cap sheet 20 may include at least two high-strength yarn sheets 10a, 60, and 10b to be laminated. The stacked high tenacity yarn sheets 10a, 60, and 10b may all be the same kind of high tenacity yarn sheets, or may be different kinds of high tenacity yarn sheets. The high-strength yarns used in the high-strength yarn sheets can be those of the above-described various types of high-strength yarns.

The greatest feature of the toe-cap sheet 20 shown in Fig. 22 is that at least one sheet 60 of the high-strength yarn sheets 10a, 60, and 10b to be laminated is formed by superimposing a plurality of high- have. The high-strength yarn sheet pieces may have the same shape and the same size, but each high-strength yarn sheet piece may have different shapes, different sizes. The high-strength yarn sheet piece overlaps with another high-strength yarn sheet piece, and another high-strength yarn sheet piece overlaps another high-strength yarn sheet piece to form a single high-strength yarn sheet 60 as a whole. One or more of the high-strength yarn sheets 60 formed by superposing the high-strength yarn sheet pieces may be provided on the toe-cap sheet 20.

Further, the positions where the high-strength yarn sheets 60 (hereinafter, referred to as " combined high-strength yarn sheets ") composed of high-strength yarn sheet pieces are stacked can be selected in various ways. As shown in FIG. 23, The sheet 60 may be disposed between the other high-strength yarn sheets 10a and 10b, or may be disposed at the upper or lower ends of other high-strength yarn sheets 10a and 10b, as shown in FIGS.

In the case where at least one of the high strength yarn sheets 10a, 60 and 10b constituting the toe cap sheet 20 is provided with one or more combined high strength yarn sheets 60, the strength increasing rate is much larger than the thickness increasing rate of the toe- It is effective. In other words, it is easily predicted that the strength of the toe-cap sheet 20 will increase as the thickness of the toe-cap sheet 20 increases. Conversely, the easiest way to improve the strength of the toe- will be. However, as described above, when the thickness of the toe-cap sheet 20 is increased, the weight of the toe-cap sheet 20 also increases and the wearing feeling is lowered. However, when one or more combined high-strength yarn sheets 60 are provided on the toe-cap sheet 20, the strength-to-thickness-ratio increase ratio, which is greater than when using one general high- The combined high strength yarn sheet 60 is slightly thicker in thickness than the normal high strength yarn sheets 10a and 10b, but has a much higher strength. Therefore, when one or more combined high-strength yarn sheets 60 are provided on the toe-cap sheet 20, the strength is improved compared with a toe cap having the same thickness, which is made of the general high-strength yarn sheets 10a and 10b. For example, when two sheets of general high strength yarn sheets 10a and 10b are laminated, the strength improvement effect is about twice as high as that of one high strength yarn sheet, but the thickness is doubled. On the other hand, in the case of the combined high strength yarn sheet 60, the thickness is about 1.5 times that of the normal high strength yarn sheet but the durability strength is twice as high as 1.5 times, There is an effect of improving the strength. Therefore, the toe-cap sheet including the combined high-strength yarn sheet has an effect of reducing weight and thickness as compared with the toe-cap sheet having the same strength as that of the normal high-strength yarn sheet alone.

26 shows another embodiment of the toe-cap sheet constituting the toe-cap according to the embodiment of the present invention. Fig. 27 shows a vertical sectional view of the toe-cap sheet in Fig. 26, Modifications of the toe cap sheet of Fig. 27 are shown.

Referring to Figs. 26 and 27, the toe-cap sheet 20 may include at least two stacked high-strength yarn sheets 65, 10a, 10b and 10c. The stacked high-strength yarn sheets 65, 10a, 10b, and 10c may all be high-strength yarn sheets of the same kind or may be different kinds of high-strength yarn sheets. The high-strength yarns used in the high-strength yarn sheets can be those of the above-described various types of high-strength yarns.

The greatest feature of the toe-cap sheet 20 shown in Fig. 26 is that at least one high-strength yarn sheet 65 among the high-strength yarn sheets 65, 10a, 10b and 10c to be laminated is folded or curved so that at least one other high- And the end portions of the used yarn sheets 10a, 10b, and 10c. At this time, the form in which the high-strength yarn sheets 65 wrap the other high-strength yarn sheets 10a, 10b, 10c may be variously modified. As shown in Fig. 27, the high-strength yarn sheet 65 can cover both ends of the other high-strength yarn sheets 10a, 10b, and 10c. 27 is shown as a sectional view, only two end portions of the high-strength yarn sheets 10a, 10b, 10c are shown as being wrapped, but the end portions in all directions of other high-strength yarn sheets 10a, 10b, 10c are folded It can be wrapped by the curved high-strength yarn sheet 65. Further, as shown in Fig. 27, folded or curved high-strength yarn sheets 65 may be wrapped only at one end of another high-strength yarn sheets 10a, 10b, 10c. As shown in Fig. 27, the high-strength yarn sheets 10a, 10b and 10c, which are folded or curved, are wrapped around the other high-strength yarn sheets 10a, 10b and 10c, Or wrapped in a closed form so that the wrapped high strength yarn sheets 10a, 10b, and 10c are not exposed to the outside, as shown in FIG. Further, as shown in the drawing, the high-strength yarn sheet 65 laminated on the upper side can be folded down, and on the contrary, the high-strength yarn sheet laminated on the lower side can be folded up.

The greatest advantage of the toe-cap sheet 20 of the present embodiment is that the rate of increase in strength is much greater than that of the toe-cap sheet 20. In other words, the toe-cap sheet 20 configured to fold at least one high-strength yarn sheet 65 to fold or curl and wrap the ends of at least one other high-strength yarn sheet 10a, 10b, 10c, There is an effect that the strength is improved as compared with the toe-cap sheet having the same thickness which is stacked. For example, the increase in thickness caused by folding the high-strength yarn sheet to wrap another high-strength yarn sheet is about 1.5 times the thickness of the corresponding high-strength yarn sheet. Therefore, when the high-strength yarn sheet is simply laminated with two sheets, the strength is improved by about twice as much as that of one high-strength yarn sheet, but the thickness is twice as thick as that of the single high-strength yarn sheet. The increase in the durability strength is twice as much as that in the case of stacking the high-strength yarn sheet, and the increase in strength is twice as high as that in the case of wrapping the high-strength yarn sheet. It is effective. Therefore, the toe-cap sheet in which the high-strength yarn sheet is configured so as to enclose the high-strength yarn sheet as compared with the toe-cap sheet having the same endurance strength that merely stacks the high-strength yarn sheets is effective in reducing weight and thickness.

The spirit of the present invention is not limited to the embodiments shown in this specification. That is, those skilled in the art of the present invention can readily suggest other embodiments by adding, changing, deleting, adding, or the like to components within the scope of the same concept, but it is also within the scope of the present invention something to do.

10: First high strength history sheet 20: Top cap sheet
40: ultra high molecular weight PE fiber sheet 50: general purpose plastic
70: second high strength history sheet
90: mold 100: shoes with toe cap
110: main body 111: sheath
112: endothelium 120: soles
130: toe cap 131:

Claims

A toe cap coupled to the shoe to cover the toe portion,
A first high strength history sheet; And
And a second high strength yarn sheet laminated on one surface of the first high strength yarn sheet,
At least two sheets of high strength yarns are laminated and joined to form a toe-cap sheet into a shape of a toe-cap,
Wherein the toe-cap sheet includes at least one high-strength yarn sheet formed by superposing a plurality of high-strength yarn sheet pieces
TOCAP.

A toe cap coupled to the shoe to cover the toe portion,
A first high strength history sheet; And
And a second high strength yarn sheet laminated on one surface of the first high strength yarn sheet,
At least two sheets of high strength yarns are laminated and joined to form a toe-cap sheet into a shape of a toe-cap,
And at least one high-strength yarn sheet of at least two of said high-strength yarn sheets is folded or curved so as to wrap an end of at least one other high-strength yarn sheet
TOCAP.

3. The method according to claim 1 or 2,
Characterized in that the first high strength yarn sheet is an aramid fiber sheet
TOCAP.

3. The method according to claim 1 or 2,
The second high-strength yarn sheet has a high-
And at least one fiber selected from the group consisting of aramid fiber, PBO fiber, polyarylate fiber, UHMWPE (ultra high molecular weight polyethylene) fiber, carbon fiber, nylon fiber, Vasart fiber, ceramic fiber and glass fiber To
TOCAP.

3. The method according to claim 1 or 2,
The second high-strength yarn sheet has a high-
At least two fibers selected from the group consisting of aramid fibers, PBO fibers, polyarylate fibers, ultra high molecular weight poly ethylene (UHMWPE) fibers, carbon fibers, nylon fibers, bazaar fibers, ceramic fibers, glass fibers and metal fibers Characterized in that
TOCAP.

3. The method according to claim 1 or 2,
Wherein the at least two high-strength yarn sheets are bonded to each other by heating, pressing, or ultrasonic method
TOCAP.

3. The method according to claim 1 or 2,
Characterized in that said at least two high-strength yarn sheets are bonded to each other by an adhesive
TOCAP.

3. The method according to claim 1 or 2,
Wherein the first high-strength yarn sheet and the second high-strength yarn sheet are prepregs
TOCAP.

9. The method of claim 8,
Wherein the first high-strength yarn sheet and the second high-strength yarn sheet are unidirectional prepregs
TOCAP.

10. The method of claim 9,
The fiber arrangement direction of the first high-strength yarn sheet and the fiber arrangement direction of the second high-strength yarn sheet cross each other
TOCAP.

3. The method according to claim 1 or 2,
Wherein the first high-strength yarn sheet or the second high-strength yarn sheet is formed with a plurality of bends
TOCAP.

3. The method according to claim 1 or 2,
And the strength of the high-strength yarn used for manufacturing the first high-strength yarn sheet and the second high-strength yarn sheet is 20 to 55 cN / dtex
TOCAP.

3. The method according to claim 1 or 2,
Characterized in that said at least two high-strength yarn sheets are assembled and joined together
TOCAP.

3. The method according to claim 1 or 2,
Wherein the toe cap is formed with a plurality of engaging projections to be inserted into engaging grooves formed in the sole of the shoe, engaging ribs to be adhered or sewn on the sole, and bottom surface covering the bottom of the toe portion of the shoe,
TOCAP.

3. The method according to claim 1 or 2,
The toe-
The shoe is coupled to the inside of the front of the shoe, covers the front outside of the shoe, or covers the front of the shoe in which the toe part is incised
TOCAP.

3. The method according to claim 1 or 2,
Wherein the toe cap has a thickness of 1.3 to 7 millimeters
TOCAP.

3. The method according to claim 1 or 2,
At least two sheets of high strength yarns are stacked so as to protrude from the inner side surface of the toe cap to the outer side in order to be further projected in the edge direction.
TOCAP.