JP6606788B1 - Elastically deformable string - Google Patents

Abstract

An object of the present invention is to restore a deformed string with a stronger elastic force in an elastically deformable string that does not require a knot. A string is formed by dividing an intermediate region excluding left and right end regions into a plurality of regions having different elastic forces, and has a circular shape with substantially the same cross section over the entire length in the axial direction. The outer layer and the core material continuously arranged over the entire inner length of the outer layer are formed, and in the intermediate region of the outer layer, a plurality of regions having different elastic forces are formed by different weaving yarns for the outer layer, and both left and right end regions of the outer layer Is formed by closely knitting the outer layer yarn, and the core material is formed of a stretchable string, and is arranged in a relaxed and / or meandering state inside the intermediate region. [Selection] Figure 1

Description

  The present invention relates to an elastically deformable string that does not require a knot.

  Elastically deformable strings that do not require a knot are well known in the art. Specifically, it is composed of a hump part that can be elastically deformed in the axial direction by applying tension to the string from the axial direction, and a connecting part that connects the hump parts. The three structures shown are mainstream.

  All of the strings having the conventional humps shown in Patent Documents 1 to 3 have their merits and demerits, and the user's request cannot be sufficiently satisfied.

  FIG. 7 is a diagram showing a string described in Patent Document 1, and is formed by weaving an outer layer made of a non-stretchable fiber material on the outside of a core material made of an elastic material such as rubber, and a hump portion is a fiber material. It is formed by “sag”. Elastic deformation is due to the action of a core material such as rubber arranged straight in the center of the string, and the part corresponding to the hump part mainly expands and contracts, that is, stress concentrates on a part of the core material such as rubber. This results in partial deterioration of the core material due to repeated use, and the hump is a "slack" of non-stretchable fiber material, so the friction resistance when passing through the string hole is large, and it is attached to the string hole Occasionally, the user's finger hurts, is easily caught in the string hole, and the string hole itself may be damaged.

  8 and 9 are diagrams showing the strings described in Patent Documents 2 and 3, which have been improved by the applicants in order to solve the problems of the invention described in Patent Document 1. The central straps described in Patent Documents 2 and 3 (corresponding to the core material of the present application) are made of a non-stretchable material that does not elastically deform, and the elastic deformation of the hump portion is a tube-shaped string main body (in the outer layer of the present application) Equivalent). As a result, the force for elastically deforming the hump part is small, it is easy to pass through the string hole, and the damage to the string hole is small, while conversely it is easy to deform and the force to return to the original shape is weak. In an intense motion scene where a strong stress is generated between the strap hole, there is a drawback that the hump portion is easily pulled out of the strap hole.

  On the other hand, in the strings described in Patent Documents 2 and 3, when trying to increase the elastic force of the hump, it is sufficient to include a large amount of fiber such as rubber in the fiber used for the tube-shaped string main body. The knurled portion itself becomes hard, and a problem occurs when passing through the string hole as in the string described in Patent Document 1.

  In contrast, in Japanese Patent Application No. 2018-104865 (Patent No. 6425364, Patent Document 4), the applicant does not have a knot in the middle region of the lace, and the middle region has the same diameter as a normal shoelace. However, it has been proposed to have different tensile elastic modulus for each of several regions.

  However, as described in Japanese Patent Application No. 2018-104865 (Patent No. 6425364, Patent Document 4), as in Patent Documents 1 to 3, the elastic deformation is performed only by the outer layer, and the core material is a non-stretchable material. Therefore, there is a drawback that the position of the set string is likely to shift in a severe motion scene where a strong stress is generated between the string hole.

Japanese Patent No. 3493002 Patent No. 5079926 Japanese Patent No. 5392519 Japanese Patent Application No. 2018-104865 (Patent No. 6425364)

  The invention of the present application solves the above-mentioned problems of the prior art and enhances the return force when set in the string hole, so that the set string can be used even in intense exercise scenes where strong stress is generated between the string hole. The purpose of the present invention is to provide a string that is difficult to be displaced.

  In an embodiment having one or a plurality of elastically deformable or non-elastically deformable humps in at least one of the left and right end regions of the string, when passing the hump through the string hole, Patent Document As with the cords described in 2 and 3, the return force of the hump and the holding force for the cord hole when it has been passed through the cord hole while being easy to pass with a light force can be obtained by using an elastically deformable core material. An object of the present invention is to provide a cord having the same level as that described in Patent Document 1.

  In order to achieve the above object, the present invention is a string that is elastically deformable in the axial direction, the middle region excluding the left and right end regions is divided into a plurality of regions having different elastic forces, and the axial total length And the string is formed of an outer layer that forms the outer shape of the string and a core material that is continuously disposed over the entire inner length of the outer layer, and the intermediate region of the outer layer. A plurality of regions having different elastic forces are formed by different weaving outer layer yarns, the left and right end regions of the outer layer are formed by closely weaving outer layer yarns, and the core material is a stretchable string. And is arranged in a relaxed and / or meandering state inside the intermediate region.

  According to the present invention having the above configuration, since a plurality of regions having different elastic forces in the axial direction are formed in the intermediate region, a necessary tension is applied to a necessary portion when being worn on a shoelace or clothing. On the other hand, because it does not have a hump like the first and second inventions, it does not require a troublesome threading work when attaching or tension correction, and it looks the same as a normal braid and has a clean appearance. Can be a braid. Furthermore, by applying the elastic force of the core material arranged in a relaxed and / or meandering state inside the intermediate region, it is possible to suppress the positional deviation of the already set string even in a severe motion scene.

  As described above, the present invention makes the core material elastically deformable, so that there is no stress concentration generated in the rubber material arranged in a straight state like the cord described in Patent Document 1 (only the rubber material). In this case, the cord can be arranged only in a straight line), and the core material can be prevented from being broken or damaged. Since the entire elastic force can be increased, it is possible to effectively prevent displacement from the string hole.

The figure for demonstrating typically the section of the string concerning the embodiment of the present invention. The whole perspective view of the string concerning the first reference embodiment of the present invention. The figure for demonstrating typically the cross section of the string which concerns on 1st reference embodiment of this invention. The figure for demonstrating typically the manufacturing apparatus and manufacturing method of a string. The figure for demonstrating typically the cross section of the string which concerns on the modification of 1st reference embodiment of this invention. The figure for demonstrating typically the cross section of the string which concerns on 2nd reference embodiment of this invention. The string which has the conventional hump part (the 1). The string which has a conventional hump part (the 2). The string which has a conventional hump part (the 3).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the said embodiment at all, and can be implemented with various aspects within the range which does not deviate from the summary. The “relaxed and / or meandered state” of the core material referred to in the present invention means a shape in which the core material having elastic force is not straightly stretched but relaxed and meandered. is there.

  FIG. 1 is a diagram schematically showing a cross-section of the lace 1, and the outer layer 4 has an intermediate area 9 having the same diameter as that of a normal shoelace or the like, except for the stopper knuckle 10 arranged on the left and right sides. While being formed, the intermediate region 9 is divided into regions having three different elastic forces (tensile elastic modulus) A, B, and C. For the detailed structure of the outer layer according to this embodiment, refer to Japanese Patent Application No. 2018-104865 (patent No. 6425364) proposed by the applicant. Further, there may be two or more different elastic forces, and the arrangement may be such that the elastic force gradually decreases (or increases), or high, medium, low, medium, high, -You may arrange repeatedly in the order.

  The core material 5 is disposed in a relaxed (or meandering) state inside the outer layer 4 in the intermediate region 9, and the string 1 is divided into two elastic forces, that is, the elastic force of the outer layer 4 in the intermediate region 9 and the elastic force of the core material 5. It can be expanded and contracted by elastic force.

  The string 1 according to this embodiment is not the one in which the hump part 2 or the long elastic part 6 is locked in the positional relationship with the string hole as in the first and second reference embodiments described below. However, the outer layer 4 of the intermediate region 9 is formed with a plurality of regions having different elastic forces in the axial direction, so it is attached to a shoelace or clothing. In this case, a necessary tension can be applied to a necessary portion, and since there is no hump portion 2 or a long elastic portion 6 as in the first and second reference embodiments described below, the tension can be applied at the time of mounting or tension. At the time of correction, it is possible to make a braid that does not require a troublesome threading operation, has the same appearance as a normal braid, and has a clean appearance.

  Furthermore, in addition to the elastic force of the outer layer 4 in the intermediate region 9, the elastic force of the core material 5 arranged in a meandering (and / or relaxed) state is added to the inner layer 9, so that it is already set even in intense exercise scenes. The positional deviation of the string 1 can be suppressed.

The stopper humps 10 disposed on both the left and right sides of the string 1 are humps for maintaining the set state of the string 1 attached to shoes or the like, as in the second reference embodiment described below. It is for giving a function as an end stopper, and has a different purpose and function from the hump portion 2 arranged over the entire length of the string 1 in the first reference embodiment described below. It is.
Further, the core material 5 may be a braid, a Lilian braid, or other various braids, and may be a twisted braid. Anyway, the core material 5 should just be a string (an elastic composite fiber string is included) which has the elasticity which combined the elastic fiber and the non-elastic fiber.

  FIG. 2 is an overall perspective view of the elastically deformable string 1 according to the first embodiment of the present invention. FIG. 1 is an overall view showing a natural state in which an external force is not applied to the string 1, and a plurality of humps 2 having the same diameter are arranged at appropriate intervals in the axial direction. 2 is connected by a small diameter connecting portion 3. Usually, the diameter of the connecting portion 3 is smaller than a string hole (for example, shoelace hole of a shoe) formed on the wearing object, and the diameter of the hump portion 2 is larger than that of the string hole. It passes through the string hole without frictional contact, and the hump portion 2 is deformed while being in frictional contact with the string hole. Both end portions of the cord 1 are lead portions that are first passed through the cord hole, and basically have the same configuration as the connecting portion 3 or are thinner and harder so that the cord is not unwound and the yarn is not loosened. It is covered with a resin or the like.

  FIG. 3 is a diagram schematically showing a cross section of the string 1. FIG. 3A shows a natural state where no external force is applied, and FIG. 3B shows a state where the cord is pulled to the maximum by an external force from the axial direction. Show. As shown in FIG. 3, the string 1 includes an outer layer 4 that forms an outer shape, and a core member 5 that is continuously arranged over the entire inner length of the outer layer 4. The structure of the outer layer 4 is basically the same as that of Japanese Patent No. 5079926, and is a braid formed by knitting a stretchable yarn and a non-stretchable yarn in an appropriate combination, and the hump portion 2 swells softly by knitting loosely. The connecting portion 3 is formed so as to be hard and thin by being tightly knitted (the connecting portion 3 is not substantially elastically deformed like a normal string).

  The core material 5 is a thin elastically deformable braid arranged in the outer layer 4, and is arranged in a meandering state inside the hump portion 2 as shown in FIG. 3A, and straight inside the connecting portion 3. It is arranged in a stretched state.

  The core material 5 is a knitted string (for example, braided string or knitted string) in which an elastic yarn made of an elastic material such as natural rubber or synthetic rubber and a non-elastic yarn made of an inelastic material such as nylon or polyester are knitted in an appropriate ratio. Lilian braided cord) and has elasticity. The elastic force of the core material 5 can be changed by the number ratio of the stretchable yarn and the non-stretchable yarn. For example, the number ratio of the stretchable yarn and the non-stretchable yarn is 1: 1, 1: 2, 1: It can be knitted with an appropriate number ratio such as 3, 1: 4, 1: 5, 1: 6. The elastic force of the core material 5 can be adjusted by appropriately determining the number ratio.

  The knitted string used for the core material 5 may be a knitted string knitted using only a so-called known stretchable composite fiber yarn in which stretchable fibers and non-stretchable fibers are integrated. When using this stretchable composite fiber yarn, fine stretchable fibers and fine non-stretchable fibers can be blended at an appropriate ratio, so compared to the case of using the aforementioned stretchable yarn and non-stretchable yarn. The elastic force of the core material 5 can be finely adjusted. In the present invention, considering the function of the core material 5, the blending ratio of the stretchable fibers is preferably in the range of 15 to 50% with respect to the non-stretchable fibers.

  FIG. 4 schematically shows an apparatus and a method for manufacturing the string 1, and a nylon thread 7 that is a non-stretchable thread and a rubber that is a stretchable thread, centering on the core material 5 prepared in advance as described above. The yarn 8 is knitted in an appropriate combination, and the protruding portion 2 that swells softly and bulges loosely or densely by adjusting the pulling speed and the hard and thin connecting portion 3 are formed as the outer layer 4. At the same time, the core member 5 located at the center of the inside is arranged in a meandering manner inside the hump portion 2 and arranged in a state of extending straight inside the connecting portion 3.

  The core material 5 is in close contact (crimping) with the outer layer 4 inside the hard and thin connecting portion 3, and is not in close contact with the outer layer 4 inside the softly bulging hump portion 2, and is in a substantially free meandering state. .

  The string 1 manufactured by using the above apparatus and method can be easily elastically deformed by an external force from the axial direction while the hump portion 2 formed so as to swell softly by loosely knitting, while being tightly knitted. The connecting portion 3 formed to be hard and thin hardly deforms.

  The hump portion 2 has resistance against external force by the elastic force of the outer layer 4 and the elastic force of the core material 5 and has a restoring force. For example, the hump portion 2 is passed through the string hole at a normal speed. In this case, since the frictional force between the string hole and the hump portion 2 is proportional to the elastic force of the hump portion of the outer layer 4, it can be passed with a small force. That is, in this state, the core material 5 is still in a relaxed and / or meandering state, so that almost no elastic force is generated, so that the string hole is passed while resisting the elastic force of only the hump portion 2. On the other hand, in an intense motion scene, a large external force is suddenly applied to the entire string 1 (or locally). In this case, the elastic force of the outer layer 4 of the hump portion 2 and the elastic force of the core material 5 are combined. Thus, the resistance is increased, and the hump portion 2 is not easily pulled out from the string hole.

Table 1 shows the results of making samples 1 to 7 and comparative examples 1 and 2 based on this reference embodiment, and experimenting the overall elastic force of the cord 1, the effect of the hump on the cord hole, and the like. is there. Comparative Example 1 is a string based on the invention described in Patent Document 2, Comparative Example 2 is a string based on the invention described in Patent Document 1, and Samples 1 to 7 and Comparative Examples 1 and 2 both have a total length of 50 cm. The diameter of the hump was 7 mm and the number of humps was 30.

  The pulling force is a force (elastic force) against the external force of the entire string, which is obtained by measuring the force required for each string to extend by 5 cm and 10 cm in g. As shown in Table 1, Samples 1 to 7 have an elastic force that is 2 to 5 times greater than that of Comparative Example 1, and by increasing the amount of the elastic material, the samples 1 to 7 are more elastic than Comparative Example 2. You can also have power.

The experiment through the string hole was to measure how much the string hole was deformed and expanded by passing the knot portion of each string 100 times through a 4 mm circular string hole formed on cardboard. The force (elastic force) against the external force of the part can be measured. As a result of the experiment, although the string holes of Samples 1 to 7 were enlarged by about 20% at the maximum, there was not much difference compared with Comparative Example 1, while in Comparative Example 2, the string holes were greatly damaged.

  As can be seen from the results of the above experiment, the hump portion 2 of the string 1 according to the present embodiment passes through the string hole with almost the elastic force of the hump portion 2, so that a large force is not required and damage to the string hole is suppressed. be able to. In addition, if the string hole has a structure in which a metal ring is crimped to the string hole, even the hard hump part 2 has little damage to the string hole. In Comparative Example 2 which does not elastically deform, it is difficult to pass the string hole itself.

  The rightmost column of Table 1 is the result of a tensile test of only a 10 cm core material, and indicates the maximum elongation (maximum length) of each core material, and the core materials 5 of samples 1 to 7 are compared. It can be seen that it has a greater extensibility compared to Example 1. In addition, it can be seen that some of the samples are greatly elastically deformed as compared with Comparative Example 2 using only the rubber material. This is because the core material 5 of the present invention is formed by knitting a stretchable material such as rubber, and the stretchable material longer than its natural length is spirally or meandered to the core material 5 of a predetermined length. This is because, since it is knitted, it is greatly elastically deformed compared to Comparative Example 2 using only a rubber material. Therefore, the elastic force can be changed more flexibly than Comparative Example 2 using a single thick rubber thread.

  In addition, although the sample produced for the said experiment is what produced the elastic thread | yarn and the non-stretchable thread | yarn by some typical number ratios, this invention is not limited to this number ratio.

  FIG. 4 schematically shows a cross-section of the string 1 according to the modified example of the first reference embodiment described above. In this modification, the hump portion 2 having a plurality of types of diameters is arranged in the axial direction of the string 1. For example, when forming a shoelace, the hump portion 2 on the toe side of the shoe has a small diameter, The diameter of the hump portion 2 on the side is made large so that it can be easily attached to the string hole. The core material 5 is also arranged to meander inside the hump portion 2 having various diameters in the modified example. For the detailed structure of the outer layer, refer to International Publication WO2018 / 163268A1 proposed by the applicant.

  In addition, in this 1st reference embodiment and its modification, although the core material 5 is the state meandering inside the hump part 2, what is necessary is just the so-called relaxed state which is not extending straight.

  Next, a second reference embodiment of the present invention will be described. FIG. 5 is a diagram schematically showing a cross section of the string 1, and a portion that is fixed through the string hole is formed as a long elastic portion 6 instead of the hump portion 2. This long elastic portion is formed so as to be continuous and sparse in the process of weaving the outer layer 4, and can be elastically deformed similarly to the hump portion 2 in the first reference embodiment. For the detailed structure of the outer layer 4 according to the second reference embodiment, refer to Japanese Patent Application No. 2017-57383 proposed by the applicant.

  The core material 5 is arranged in a meandering (and / or relaxed) state inside the long elastic portion 6, and the string 1 is caused by the elastic force of the long elastic portion 6 and the two elastic forces of the core material 5. It can be expanded and contracted.

  The stopper humps 10 arranged on the left and right sides of the string 1 are knots on the end of the string formed to maintain the set state of the string 1 attached to shoes or the like, and function as a so-called end stopper. The hump part 2 arranged over the entire length of the string 1 in the first embodiment has a different purpose and function.

  The diameter of the long elastic portion 6 in the natural state may be the same diameter as the diameter of the stopper hump 10 disposed on the left and right sides of the string 1, or may be a small diameter or a large diameter. Furthermore, the connection part 3 demonstrated in 1st embodiment can be used between the elongate elastic part 6 and the hump 10 for stoppers.

  According to the string 1 of the second reference embodiment, for example, when the long elastic part 6 is passed through the string hole at a normal speed, the frictional force between the string hole and the long elastic part 6 is proportional to the elastic force of the outer layer 4. Therefore, it can pass with a small force. That is, in this state, since the core material is still in a relaxed and / or meandering state, almost no elastic force is generated, and thus the string hole is passed while resisting the elastic force of only the long elastic portion 6. On the other hand, in an intense exercise scene, a large external force is suddenly applied to the entire string 1 (or locally), but against this external force, the elastic force of the outer layer 4 that the long elastic portion 6 has and the elastic force that the core material 5 has As a result, the resistance increases and it is possible to prevent the long elastic portion 6 from being easily displaced from the string hole.

  In the embodiment of the present invention and each of the reference embodiments described above, the core material 5 has been described as a braided string or a Lilian braided string. However, other various braided strings may be used, and a twisted string may also be used. Anyway, the core material 5 should just be a string (elastic composite fiber string) which has the elasticity which combined the stretchable fiber and the non-stretchable fiber.

  Since the manufacturing method of the string 1 which concerns on embodiment of this invention and said 2nd reference embodiment is the same as that of 1st reference embodiment fundamentally, detailed description is abbreviate | omitted.

  As described above, according to the string 1 according to the present invention, in addition to the elastically deformable outer layer 4, the core material 5 disposed therein can also be elastically deformed. Since it can be resisted by the elastic force of the outer layer 4 and the elastic force of the core member 5, it can be prevented from easily deviating from a predetermined set position.

DESCRIPTION OF SYMBOLS 1 String 2 Hump part 3 Connection part 4 Outer layer 5 Core material 6 Long elastic part 7 Nylon thread 8 Rubber thread 9 Middle area 10 Hump for stopper

Claims (12)

A string that is elastically deformable in the axial direction,
The middle region excluding the left and right end regions is divided into a plurality of regions having different elastic forces, and has a circular shape with substantially the same cross section over the entire length in the axial direction.
The string comprises an outer layer that forms the outer shape of the string and a core material that is continuously arranged over the entire inner length of the outer layer,
In the intermediate region of the outer layer, a plurality of regions having different elastic forces by forming different yarns for the outer layer are formed,
The left and right end regions of the outer layer are formed by closely knitting outer layer yarns,
The core material is composed of a stretchable string, and is arranged in a relaxed and / or meandering state inside the intermediate region.
An elastically deformable string characterized by that. The stretchable string used for the core material is formed by knitting stretchable yarn and non-stretchable yarn at a ratio of 1: 1, 1: 2, 1: 3, 1: 4, or 1: 5. A braided or twisted twisted string,
The elastically deformable string according to claim 1. The stretchable string used for the core material is a knitted string knitted using a stretchable composite fiber yarn in which stretchable fibers and non-stretchable fibers are integrated, or a twisted twisted string. The blending ratio of the fiber is 15 to 50% with respect to the non-stretchable fiber.
The elastically deformable string according to claim 1. The elastic yarn and the elastic fiber are made of synthetic rubber or natural rubber material,
The elastically deformable string according to claim 2 or 3. The non-stretchable yarn and the non-stretchable fiber are made of nylon or polyester material.
The elastically deformable string according to claim 2 or 3. The string used for the core material is a braided string or a Lilian braided string,
The elastically deformable string according to claim 2 or 3. The outer layer is a braid.
The elastically deformable string according to any one of claims 1 to 6, wherein the string is elastically deformable. The outer layer yarn is a combination of a stretchable yarn and a non-stretchable yarn, or a stretchable composite fiber yarn in which a stretchable fiber and a non-stretchable fiber are integrated.
The elastically deformable string according to any one of claims 1 to 7, wherein the string is elastically deformable. The intermediate region is configured by alternately arranging two or three types of regions having different elastic forces along the axial direction.
The elastically deformable string according to any one of claims 1 to 8, wherein the string is elastically deformable. The intermediate region is configured by sequentially arranging a plurality of regions in which the elastic force gradually decreases from one end to the other end along the axial direction.
The elastically deformable string according to any one of claims 1 to 8, wherein the string is elastically deformable. The string has one or a plurality of elastically deformable or non-elastically deformable humps in at least one of the left and right end regions.
The elastically deformable string according to any one of claims 1 to 10, wherein the string is elastically deformable. The intermediate region is connected by a connecting portion that does not elastically deform between the plurality of regions having different elastic forces.
The elastically deformable string according to any one of claims 1 to 11, wherein the string is elastically deformable.