TW202103592A - Foot cover and method for manufacturing foot cover - Google Patents

Abstract

The present invention provides the foot cover which inhibits deterioration in comfort in wearing and decrease in flexibility which would be caused by an adhesive member provided at a heel part. The foot cover includes a plantar part which is to cover a sole of a foot, and a side part which is to cover a toe and a heel of the foot and to cover both sides of the foot which extend from the toe to the heel. The side part is made of seamless annular flexible cloth having a foot insertion opening part, and the plantar part is joined to the side part with a joining process excluding sewing.

Description

Invisible socks and manufacturing method of invisible socks

The present invention relates to an invisible sock. More specifically, it relates to an invisible sock that is joined by a joining method other than sewing.

In recent years, it has become common to wear shoes such as pumps or sports shoes directly barefoot. When wearing shoes directly barefoot, invisible socks are often worn because sweat etc. evaporate in the shoes and become wet. However, if there is a sewn (seam) part on the invisible socks, it will be compressed by boat-shaped high heels, etc., the sewn part will penetrate into the skin, and the sewn part will contact the skin, which reduces the wearing comfort.

Therefore, some people have proposed invisible socks that do not have a sewn part. For example, in Patent Document 1 and Patent Document 2 below, a knitted fabric and an adhesive tape are joined to form invisible socks in a three-dimensional shape without a sewn part. In Patent Document 1, a joining member such as an adhesive tape is used to join a first stretch knitted fabric forming a side portion, a heel portion, and a toe portion, and a second stretch knitted fabric forming the sole of the foot. Thereby, the invisible sock is formed into a three-dimensional shape without a seam portion. In addition, in Patent Document 2, one stretch knitted fabric is joined by an adhesive tape. Thereby, the invisible sock becomes a three-dimensional shape without a seam part.

[Prior Technical Literature] [Patent Literature] [Patent Document 1] Japanese Patent Publication "JP 2018-95996 A (published on June 21, 2018)" [Patent Document 2] Japanese Patent Publication "JP 2017-14669 A (published on January 19, 2017)"

[The problem is solved by the invention] However, the techniques of Patent Documents 1 and 2 have a structure in which an adhesive tape is attached to the heel part (heel part) where the invisible sock is easy to fall off. Generally speaking, because the area of the invisible socks covering the feet forms a small area, the invisible socks are not conspicuous when worn, so the invisible socks have a structure that is easy to put on and take off. When the invisible socks fall off, they first fall off from the heel part of the invisible socks, and the part near the heel of the bottom of the foot and the side part will often fall off together with the heel part. As a result, when the adhesive tape is attached to the heel part (heel part) of the invisible sock that is easy to fall off, the elasticity of the base is impaired, and the wearing position is shifted, which causes the problem that it is easy to fall off excessively. In addition, since the heel part is the part where the base is firmly pressed on the foot, sticking an adhesive tape on the heel part (heel part) causes a problem of reduced wearing comfort.

In view of the above-mentioned problems, one aspect of the present invention aims to provide a concealed sock, which can suppress the decrease in wearing comfort and the deviation/fall of the invisible sock.

[Means to Solve the Problem] In order to solve the above-mentioned problems, an invisible sock system of one aspect of the present invention includes: the sole of the foot, which covers the sole of the foot; the side part, which covers the toe and heel of the foot and the two parts of the foot from the toe to the heel. The side; the side part is made of a ring-shaped stretchable base with an opening that becomes the wearing port; the bottom of the foot and the side part are joined by a joining method other than sewing; wherein, the side part is formed by The aforementioned annular stretchable base is seamless; or, the aforementioned side part is made of the aforementioned annular stretchable base, and the aforementioned annular stretchable base is outside the heel part corresponding to the rear end of the heel There is a seam at the position, and in this seam, each stretchable base is joined by a joining method other than sewing.

In order to solve the above-mentioned problems, the manufacturing method of an invisible sock of one aspect of the present invention includes: a foot sole forming step, which forms the sole covering the sole of the foot; a side part forming step, which forms a side part, and the aforementioned side part Cover the toe, heel, and both sides of the foot from the toe to the heel; the joining step is to join the bottom of the foot and the side part by a joining method other than sewing; forming the side part in the step In this step, the stretchable base is cut, and the side surface portion having an opening that becomes the wearing port and having a substantially flat and seamless loop shape is formed; or, in the side surface portion forming step, the side portions are joined by a joining method other than sewing. A stretchable base, and forms the aforementioned annular side part; and the aforementioned annular side part has an opening that becomes a wearing mouth and is substantially flat, and has an interface at a position other than the heel part corresponding to the rear end of the heel Sew.

[Efficacy of invention] According to an aspect of the present invention, it is possible to provide an invisible sock that can suppress the decrease in wearing comfort and the shift/fall of the invisible sock.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 6. In the present embodiment, an example of the invisible socks 1 that can be used for left and right sharing is described so as to prevent wearing misalignment on both the left and right sides. However, it is not limited to this, and it can also be used for left foot and right foot. Also, for example, the invisible sock 1 may have a shape of a two-toed sock and a shape of a five-toed sock.

(Overview of invisible socks) Fig. 1 is a perspective view showing a state where the invisible socks 1 according to the embodiment of the present invention is worn on the foot F. As shown in Figure 1, the invisible sock 1 includes: the sole 2 which covers the sole 10 of the foot F; the side part 3 which covers the toe 11 and the heel 12 of the aforementioned foot F and from the aforementioned toe 11 to the aforementioned heel 12 13 on both sides of the. The invisible sock 1 is formed by joining the sole 2 and the outer peripheral portions of the two substantially flat bases constituting the side portion 3 with a joining method other than sewing (seamless joining method). The sewing referred to here refers to all methods of bonding the substrate and the substrate by using different thread-like materials, and the bonding method (sewing method) and the type of thread are not limited.

The side portion 3 is made of a stretchable base, and the center portion thereof is hollowed out into a substantially elliptical shape to form an opening that serves as a wearing opening (wearing opening) 3b for allowing the foot F to pass in and out. The wearing opening 3b is provided with a large opening so that the instep and ankle of the foot F are exposed. Thereby, when the shoes are put on, the entire invisible socks 1 is hidden in the shoes and can be worn in an unobtrusive manner.

Synthetic fibers such as nylon or polyester can be used for the sole portion 2 and the side surface portion 3 so that they can be joined by, for example, ultrasonic welding described later. In addition, from the viewpoint of high stretchability, a knitted fabric is preferred, but a woven fabric may also be used.

(The composition of invisible socks) Next, based on FIGS. 2 to 6, the specific configuration of the invisible socks 1 will be described. Fig. 2 is a plan view of the invisible socks 1 of this embodiment, Fig. 3 is a bottom view of the invisible socks 1, Fig. 4 is a front view of the invisible socks 1, Fig. 5 is a left side view of the invisible socks 1, and Fig. 6 is a view of the invisible socks 1 is a drawing showing the joining member 4 by turning it over.

As shown in FIG. 2, the side surface 3 has a shape corresponding to the outer peripheral shape of the sole 2 and is formed by cutting a piece of seamless stretchable base in such a way that it becomes slightly larger than the sole 2. In addition, the side portion 3 is hollowed out at a substantially central portion to provide a wearing opening 3b. Thereby, the side surface part 3 is formed in a substantially flat and seamless ring shape centering on the wearing opening part 3b.

In addition, the side surface part 3 is not limited to a seamless structure. The side surface portion 3 may be provided with a seam at a position other than the heel portion corresponding to the rear end of the heel 12 (see the symbol "32a" in FIG. 8). In other words, it is preferable that the side surface part 3 does not have a seam at the heel part. By making the heel part not have a seam, the deterioration of the wearing feeling of the heel part of the invisible socks 1 can be suppressed. In this specification, the rear end of the heel 12 refers to the back area of the heel 12 (heel bone) located at the rear end of the foot F. In addition, the heel portion of the side portion 3 refers to the rear end region of the heel portion of the side portion 3 corresponding to the rear end of the heel 12; in particular, it refers to the heel portion of the side portion 3 (or The heel 12 (the back of the heel bone) is divided into a longitudinal line-shaped area of left and right halves (slightly halved). In addition, a configuration example of an invisible sock having a seam on the side portion will be described in an embodiment described later.

Since the side portion 3 is made of a stretchable base, when the invisible socks 1 is worn, the side portion can follow the three-dimensional shape of the foot F, and can prevent position shift when the invisible socks 1 is taken off or worn.

In addition, the area of the instep covering the foot F can be adjusted by the hollowed-out shape of the wearing opening 3b. If the length of the wearing opening 3b in the longitudinal direction is increased, it can be used as a so-called "thin wear" invisible sock 1. On the other hand, if the length in the longitudinal direction of the wearing opening 3b is shortened, it can be used as a so-called "deep wearing" invisible socks 1.

Also, by making the diameter of the arc 3c on the heel 12 side of the wearing opening 3b larger than the arc 3d on the heel 12 side of the outer periphery of the invisible socks 1, the covering area of the heel 12 of the foot F becomes larger when it is worn, and The invisible socks 1 can be prevented from falling off.

In addition, in order to prevent wear, by using a free-cut base (a base that does not require base end processing), it becomes unnecessary to fold back the outer edge of the wearing opening 3b, or change There is no need to provide a stretchable narrow-width base or resin along the peripheral edge of the wearing opening 3b, and the wearing comfort can also be improved.

As shown in FIG. 3, the sole 2 of the foot fits the shape of the sole 10 of the foot F, and the toe portion 2d and the heel portion 2e are each formed in an arc shape. The diameter of the arc of the toe part 2d formed is slightly larger than the diameter of the heel part 2e. In addition, the two side portions 2f of the arch of the foot extending from the toe portion 2d to the heel portion 2e are each formed in an arc shape, and are gently recessed in a direction approaching each other. In addition, the sole 2 is not limited to this shape, and can be changed to another shape according to the shape of the foot F.

As shown in FIG. 4, in a side view, the appearance shape of the invisible sock 1 has a substantially flat shape. In other words, the invisible sock 1 is formed by forming the entire invisible sock 1 into a substantially flat shape, and each of the outer peripheral portions 2a, 3a of the two bases that form the bottom of the foot 2 and the side portion 3 are substantially flat. , And seamlessly join each other.

To explain in more detail, when the invisible socks 1 is not worn, for example, in the heel portion of the invisible socks 1, in a direction other than a plane such as a slightly vertical direction, for example, the side portion 3 is not raised. The side surface part 3 has a flat and seamless shape due to processing such as processing, knitting of stitches, or sewing for joining. In the same manner as the side portion 3, the outer peripheral portion 2a of the instep 2 having a substantially planar shape is joined to the outer peripheral portion 3a of the side portion 3 in such a manner to form a substantially flat shape, and the invisible sock 1 is formed. Therefore, as shown in FIGS. 4 and 5, the invisible sock 1 has a substantially flat shape as a whole in a side view, a front view, and the like. In other words, in addition to the thickness of the base and joining parts and the naturally occurring wrinkles or distortions, the invisible socks are a non-three-dimensional shape that does not have a specific height, and they are in the following shape: When the backing paper surface of the backing paper is slightly stretched, the base surface and the front and back sides of the invisible sock 1 (the side 3 and the bottom of the foot 2) of the backing paper are in close contact with the backing paper.

Thereby, when the invisible sock 1 is packed into a backing paper package, it can make the wrinkles or creases inconspicuous and be displayed on the sales floor without damaging the shape of the product. Also, because of its small size, it can be transported efficiently without occupying a storage space. In addition, the step for joining the seam can be omitted.

In addition, since the invisible socks have a substantially flat shape as a whole, the base of the side portion 3 corresponding to the heel 12 rises along the shape of the heel when worn, so the base is likely to cause force to act in the direction of fitting the heel 12. In addition, since the outer peripheral portions 2a, 3a of the sole 2 and the side portion 3 are formed by seamless joining and do not have convex portions produced by sewing, it is easy to fit into the shape of the heel. Through the above, it is possible to improve the fit feeling of the entire heel 12, and it is also possible to suppress shifting and falling off.

(Ultrasonic welding) For example, the sole 2 and the side 3 can be joined by ultrasonic welding. Ultrasonic welding refers to a method in which ultrasonic vibration and pressure are applied to two substrates to be joined, and then frictional heat is generated on the joint surface of the substrates, and they are melted and joined immediately. The joint surfaces of the substrates to be joined by ultrasonic welding can be joined in abutting manner. Therefore, it is not necessary to overlap the two bases for joining, and a slightly flat joining portion 5 that does not protrude into a convex shape can be formed, and the wearing comfort can be improved.

(Joint parts) As shown in FIG. 6, although the joint portion 5 is preferably located near the outer edge portion of the sole 10 of the foot F, it may be located near the center. In this embodiment, for example, on the inner side of the invisible sock 1, it is also possible to stick a joining member 4 provided with an adhesive tape or the like on the joining part 5. Adhesive tape refers to a method that is made of, for example, acrylic resin, silicon resin, or adhesive material such as synthetic rubber, and is suitable for bonding substrates by heating and melting the adhesive tape.

A belt-shaped joining member 4 is attached to the inner part of the side surface part 3 so that the line of the joining part 5 coincides with the center in the width direction of the joining part 4, whereby the strength of the joining part 5 can be improved.

Furthermore, in a state where the invisible socks 1 is worn on the foot F, since the side part 3 is made of a stretchable base, the side part 3 is extended in conformity with the shape of the foot F. Therefore, the invisible sock 1 can be attached to the foot F. Here, if a comparison is made with respect to the configuration in which the sole portion 2 and the side surface portion 3 are sewn-joined, in the case of the sewn-joint, the joint portion 5 is a thin line projecting convexly. Therefore, when the wearer walks, the joint part 5 may also move along with his walking motion. When the engaging portion 5 is crimped to the toe 11 and the engaging portion 5 protruding convexly is stepped on, the wearing comfort is reduced. In addition, because the joint portion 5 protrudes in a convex shape, it is difficult to form the entire invisible sock into a substantially flat shape. Especially when the base of the side portion 3 is thin, it will show a convex portion on the surface, which may be easily damaged. Beautiful on display.

In contrast, the invisible sock 1 of the present embodiment seamlessly joins the substantially flat sole 2 and the side surface 3. Therefore, the entire invisible sock 1 can be appropriately formed into a substantially flat shape, and at the same time, it is possible to prevent the wearing comfort from degrading and easily falling off.

(Method of manufacturing invisible socks) Next, the manufacturing method of the invisible sock 1 will be described. The manufacturing method of the invisible sock 1 includes: the bottom of the foot forming step, which forms the bottom of the foot 2; the side surface forming step, which forms the side part 3; and the joining step, which is seamlessly joined to join the bottom of the foot 2 and the side Section 3.

In the manufacturing method of the invisible sock 1, in the side part forming step, the stretchable base is cut along a desired pattern to form a side face that has an opening that becomes the wearing port 3b and is a substantially flat and seamless loop. Section 3. Therefore, in the joining step, by seamlessly joining the outer peripheral portions 2a, 3a of the two bases that constitute the substantially flat surface of the sole portion 2 and the side portion 3, the invisible socks 1 can be manufactured, and the wearing comfort can be prevented from being reduced. And the reduction of scalability.

In the joining step, ultrasonic welding can be performed so that the sole 2 and the side surface 3 do not overlap each other, and the sole 2 and the side surface 3 can be joined by the band-shaped joining member 4. Thereby, the thickness of the joining portion 5 can be reduced, and the wearing comfort can be improved.

In the joining step, the outer peripheral portion of the sole 2 and the outer peripheral portion of the side surface 3 can be overlapped with each other, and the sole 2 and the side surface 3 can be joined by heat fusion or an adhesive. Thereby, the sole 2 and the side surface 3 can be easily joined. Moreover, in the joining part 5 which joins the sole part 2 and the side part 3 by thermal fusion or an adhesive agent, the joining member 4 provided with adhesive tape etc. may be stuck. Thereby, the strength of the joint portion 5 can be increased.

[Embodiment 2] Other embodiments of the present invention will be described below with reference to FIG. 7. In addition, for convenience of description, components having the same functions as those described in the above embodiment are given the same reference numerals and their description is omitted.

(Double bottom) Fig. 7 is an end view cut along the line A-A shown in Fig. 2. In addition, although the invisible sock 1 has a configuration of a substantially flat shape, for convenience of description, it is drawn as a solid in FIG. 7. As shown in Fig. 7, the sole 2 of the foot may include the following components: an inner base 2b in contact with the foot F; and an outer base 2c covering the inner base 2b from the outside. In this way, for example, as the inner base 2b, a natural fiber base that is friendly to the skin and has good air permeability is used; and as the outer base 2c, a synthetic fiber base that has strength and can be ultrasonically welded is used; The material is changed between the inner base 2b and the outer base 2c.

At this time, for example, the outer base 2c of the sole 2 and the side surface 3 can be joined by ultrasonic welding. The upper surface of the joining part 5 joined by ultrasonic welding is reinforced by attaching a joining member 4a provided with an adhesive tape or the like. Next, the inner base 2b is placed thereon, and the joining member 4b provided with an adhesive tape or the like is attached to join the joining member 4a and the inner base 2b.

In this way, after joining by ultrasonic welding, by further joining with the joining member 4 such as an adhesive tape, the joining part 5 can be made flat, and the wearing comfort can be prevented from being reduced, and sufficient wear can be maintained. Bonding strength.

[Embodiment 3] Other embodiments of the present invention will be described below with reference to FIG. 8. In addition, for convenience of description, components having the same functions as those described in the above embodiment are given the same reference numerals and their description is omitted.

(The composition of invisible socks) Fig. 8 is a plan view showing the invisible sock 1a according to the embodiment of the present invention. Fig. 8 shows the state in which the invisible sock 1a is turned upside down.

As shown in FIG. 8, the invisible sock 1a has a sole 2 and a side part 30. The side part 30 includes a first side part 31 (side part) and a second side part (side part/heel part) 32. The first side surface portion 31 is formed by a stretchable base covering the toe 11 and both sides 13 of the foot F. The second side portion 32 is formed by a stretchable base covering the heel 12 of the foot F. In the heel side portions of the side portion 30 corresponding to the left and right sides of the heel 12 of the foot F, the first side portion 31 and the second side portion 32 are joined to each other by a joining method other than sewing. Thereby, it is possible to form the side surface portion 30 formed of a ring-shaped stretchable base.

On both sides of the heel of the side surface portion 30, a seam 6 serving as a joining portion of the first side surface portion 31 and the second side surface portion 32 is provided. By joining the first side surface portion 31 and the second side surface portion 32 at the seam 6, a substantially rectangular wearing opening portion 3b can be formed in a substantially central portion of the side surface portion 30. In the invisible sock 1a, the area of the side portion 30 covering the instep of the foot F is larger than the area of the above-mentioned invisible sock 1. In other words, the invisible sock 1a is a "deep wear" type invisible sock formed by making the length of the wearing opening 3b shorter than the invisible sock 1.

Here, in the invisible sock 1a, so that the heel portion 32a of the second side portion 32 corresponding to the rear end of the heel 12 does not have the seam 6, the seam 6 is provided at a position other than the heel portion 32a. In other words, the second side portion 32 is cut (slightly divided into two) in the back view when worn, the seam 6 is provided at a position other than the heel portion 32a, and the aforementioned heel portion is used as the The vertical linear region of the central portion of the second side surface portion 32. By providing the seam 6 at a position other than the heel portion 32a, since the seam 6 is not provided at the rear end of the heel 12 where pressure is easily felt, the decrease in comfort can be suppressed. Therefore, it is possible to suppress a decrease in the wearing feeling of the heel portion (second side surface portion 32) of the invisible stocking 1a.

In addition, the seam 6 does not have to be provided on the heel portion 32a. Therefore, as in the present embodiment, as long as it is in a position other than the heel portion 32a, the seam 6 may be provided on both sides of the heel of the side portion 30, or the seam 6 may be provided in positions other than the both sides of the heel.

(Method of manufacturing invisible socks) The manufacturing method of the invisible sock 1a includes: the bottom of the foot forming step, which forms the bottom of the foot 2; the side part forming step, which forms the side part 30; and the joining step, which is seamlessly joined to join the bottom of the foot 2 and the side Department 30. Among these steps, since the foot sole forming step and the joining step are substantially the same as the manufacturing method of the invisible sock 1 described above, the description thereof is omitted.

In the side portion forming step, the stretchable base is cut along the pattern of the first side portion 31 and the pattern of the second side portion 32. Next, the stretchable base of the cut first side surface portion 31 and the stretchable base of the second side surface portion 32 are seamlessly joined. At this time, the first side surface portion 31 and the second side surface portion 32 are joined so that the seam 6 is located at a position other than the heel portion 32a. Thereby, a ring-shaped side surface portion 30 is formed, and the aforementioned ring-shaped side surface portion has an opening portion as the wearing port 3b and is substantially flat, and a seam 6 is provided at a position other than the heel portion 32a. Next, in the joining step, the invisible sock 1a can be manufactured by seamlessly joining the two substantially flat bases constituting the sole portion 2 and the side portion 30.

(The effect of invisible socks) The invisible sock 1a of this embodiment includes: the sole 2 which covers the sole 10 of the foot F; the side part 30 which covers the toe 11 and the heel 12 of the foot F and the sides of the foot from the toe 11 to the heel 12 13. The side portion 30 is provided with a seam 6 at a position other than the heel portion 32a corresponding to the rear end of the heel 12, and the side portion is formed of a ring-shaped stretchable base, and the aforementioned ring-shaped stretchable base is formed by In a joining method other than sewing, the stretchable base of the first side surface portion 31 and the stretchable base of the second side surface portion 32 are joined to the seam 6.

According to the invisible socks 1a, since the side portion 30 is formed of a ring-shaped stretchable base joined at positions other than the corresponding heel portion 32a (the seam 6), it is possible to suppress the reduction in wearing comfort and the invisible socks. Offset/fall off.

[Modifications] The particles described in each of the above embodiments can be appropriately changed. For example, in Example 1 and Example 2, although the joining method combining ultrasonic welding and adhesive tape is described, any method other than sewing may be used. For example, the following joining method can be used for joining .

(Hot melt) The sole 2 and the side surface 3 may be joined by, for example, thermal melting. The outer peripheral part 2a of the sole 2 and the outer peripheral part 3a of the side part 3 are overlapped, and the overlapped part is heated and melted. With this method, it is possible to perform bonding without impairing the stretchability of the base of the bonding portion.

(Adhesive) The sole 2 and the side surface 3 may be joined by, for example, an adhesive. The outer peripheral portion 2a of the sole 2 and the outer peripheral portion 3a of the side surface 3 are superimposed, and an adhesive such as an adhesive polymer is applied to the superimposed portion, and the superimposed portion is joined by thermal fusion. In addition, it is also possible to apply an adhesive capable of bonding even without heating to perform bonding.

(Slip parts) In addition, although an example of attaching an adhesive tape from the inside of the invisible sock 1 to the joining part 5 for reinforcement has been made, it is also possible to apply an adhesive tape with a higher friction coefficient than the bottom of the foot 2 from the outside of the invisible sock 1. It is attached to the joint part 5 to have the function of anti-slip.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the present invention Within the scope of technology.

[to sum up] In order to solve the above-mentioned problems, an invisible sock system of one aspect of the present invention includes: the sole of the foot, which covers the sole of the foot; the side part, which covers the toe and heel of the foot and the two parts of the foot from the toe to the heel. The side; the side part is made of a ring-shaped stretchable base with an opening that becomes the wearing port; the bottom of the foot and the side part are joined by a joining method other than sewing; wherein, the side part is formed by The aforementioned annular stretchable base is seamless; or, the aforementioned side part is made of the aforementioned annular stretchable base, and the aforementioned annular stretchable base is outside the heel part corresponding to the rear end of the heel There is a seam at the position, and in this seam, each stretchable base is joined by a joining method other than sewing.

According to the aforementioned configuration, since the side part is formed of a seamless loop-like stretchable base or a looped stretchable base that is seamlessly joined at a position other than the heel part, it is possible to provide an invisible sock, which The system can suppress the decrease in wearing comfort and the shifting/falling off of the invisible socks.

In addition, in an invisible sock of one aspect of the present invention, the annular stretchable base may have a substantially flat shape.

According to the aforementioned configuration, since the ring-shaped stretchable base forming the side portion has a substantially flat shape, the height of the entire invisible sock can be suppressed when it is not in use.

In addition, in the invisible sock of one aspect of the present invention, it is also possible to join the sole of the foot and the side portion in such a manner that the entire invisible sock has a substantially flat shape in a side view.

According to the aforementioned structure, because the invisible socks have a substantially flat shape as a whole, when the invisible socks are packed in a backing paper package, it can make wrinkles or creases become inconspicuous and be displayed on the sales floor without damaging the product. shape. In addition, because the volume of the invisible socks is small, it can be transported efficiently without occupying a storage space.

In addition, in an invisible sock of one aspect of the present invention, the sole of the foot may include: an inner base that is in contact with the foot; and an outer base that covers the inner base.

According to the aforementioned structure, since the sole of the foot has a double structure, the strength of the sole of the foot can be improved.

In addition, in an invisible sock of one aspect of the present invention, the inner base and the outer base may be made of different materials.

According to the aforementioned structure, for example, by using natural fibers with good air permeability as the inner base in contact with the skin, and by using strong synthetic fibers as the outer base, it is possible to balance wearing comfort and strength.

In addition, in an invisible sock of one aspect of the present invention, the joint portion between the sole of the foot and the side portion may be located on the sole side of the foot.

According to the aforementioned configuration, since the joint portion is located on the sole side of the foot, and the portion where the pressure of the joint portion is easily felt is located on the toe of the foot, the wearing comfort is improved.

In addition, the invisible sock according to one aspect of the present invention may further include a joining member that seamlessly joins the outer peripheral portion of the sole and the outer peripheral portion of the side surface.

According to the aforementioned configuration, for example, the outer peripheral portion of the bottom of the foot and the outer peripheral portion of the side surface are joined by a joining member such as an adhesive tape, so that the strength of the joined portion can be improved.

In addition, in the invisible sock of one aspect of the present invention, the bottom of the foot and the side surface are not overlapped with each other, but can be joined by the joining member.

According to the foregoing configuration, since the sole and side portions of the joint part do not overlap with each other, the thickness of the joint part can be reduced, and the wearing comfort can be improved.

In addition, in an invisible sock of one aspect of the present invention, the aforementioned stretchable base can be formed from a freely cut base.

According to the aforementioned structure, in order to prevent wear of the opening as the wearing port, there is no need to fold back the outer edge of the opening, or it is not necessary to provide a stretchable narrow-width base along the peripheral edge of the opening. , So it can improve wearing comfort.

In order to solve the above-mentioned problems, the manufacturing method of an invisible sock of one aspect of the present invention includes: a foot sole forming step, which forms the sole covering the sole of the foot; a side part forming step, which forms a side part, and the aforementioned side part Cover the toe, heel, and both sides of the foot from the toe to the heel; the joining step is to join the bottom of the foot and the side part by a joining method other than sewing; forming the side part in the step In this step, the stretchable base is cut, and the side surface portion having an opening that becomes the wearing port and having a substantially flat and seamless loop shape is formed; or, in the side surface portion forming step, the side portions are joined by a joining method other than sewing. A stretchable base, and forms the aforementioned annular side part; and the aforementioned annular side part has an opening that becomes a wearing mouth and is substantially flat, and has an interface at a position other than the heel part corresponding to the rear end of the heel Sew.

According to the aforementioned method, in the side portion forming step, a substantially flat and seamless ring-shaped side portion can be formed, or a substantially flat and ring-shaped side portion having a seam at a position other than the heel portion can be formed. Therefore, it is possible to manufacture an invisible sock that can suppress a decrease in wearing comfort and a decrease in stretchability.

In addition, in the manufacturing method of an invisible sock of one aspect of the present invention, in the joining step, the sole of the foot can be joined by a belt-shaped joining member so that the sole of the foot and the side portion are not overlapped with each other. Section and the aforementioned side section.

According to the aforementioned method, since the bottom of the foot and the side surface are not overlapped with each other, the belt-shaped joining member is used for joining, so that the thickness of the joining part can be reduced and the wearing comfort can be improved.

In addition, in the manufacturing method of an invisible sock according to one aspect of the present invention, in the joining step, the outer peripheral portion of the sole of the foot and the outer peripheral portion of the side surface can be overlapped with each other, and the aforementioned can be joined by thermal fusion. The bottom of the foot and the aforementioned side.

According to the aforementioned method, it is possible to easily join the bottom of the foot and the side surface by heat fusion without using other parts.

In addition, in the manufacturing method of the invisible sock of one aspect of the present invention, in the joining step, the outer peripheral portion of the sole of the foot and the outer peripheral portion of the side portion can be overlapped with each other, and the adhesive can be used to join the The bottom of the foot and the aforementioned side.

According to the aforementioned method, the bottom of the foot and the side surface can be easily joined by the adhesive.

1,1a: invisible socks 10: sole 11: Tiptoe 12: heel 13: both sides 2: bottom of the foot 2a: The outer peripheral part of the bottom of the foot 2b: medial base 2c: lateral base 2d: toe part 2e: heel part 2f: Both sides of the arch 3: side 3a: The outer peripheral part of the side part 3b: Wearing opening (wearing mouth) 3c: arc 3d: arc 4, 4a, 4b: joining parts 5: Joining part 6: Seam 30: Side 31: The first side part (side part) 32: The second side part (side part, heel part) 32a: Heel F: Feet A-A: Section line

[Fig. 1] is a perspective view showing the state of wearing the invisible socks according to the first embodiment of the present invention on the foot. [Figure 2] A plan view of the above invisible socks. [Figure 3] is the bottom view of the invisible socks shown in Figure 2. [Figure 4] is a front view of the invisible socks shown in Figure 2. [Figure 5] is the left side view of the invisible socks shown in Figure 2. [Fig. 6] The invisible sock shown in Fig. 2 is turned over to expose the joining member. [Fig. 7] An end view cut along the line A-A shown in Fig. 2. [Fig. 8] is a plan view of the invisible sock according to the third embodiment of the present invention.

1: invisible socks

10: sole

11: Tiptoe

12: heel

13: both sides

2: bottom of the foot

3: side

3b: Wearing opening (wearing mouth)

4: Joining parts

F: Feet

Claims (13)

A kind of invisible socks, its series contains: The bottom of the foot, which covers the sole of the foot; Side part, which covers the toe and heel of the aforementioned foot, and both sides of the aforementioned foot from the aforementioned toe to the aforementioned heel; The aforementioned side part is formed by a ring-shaped stretchable base having an opening part of the wearing port; The bottom of the foot and the side surface are joined by a joining method other than sewing; wherein, The aforementioned side part is made of the aforementioned seamless ring-shaped stretchable base; or, The side part is formed by the annular stretchable base, and the annular stretchable base has a seam at a position other than the heel part corresponding to the rear end of the heel, and in this seam, each stretches The sex base is joined by joining methods other than sewing. The invisible sock according to claim 1, wherein the annular stretchable base has a substantially flat shape. The invisible sock according to claim 2, wherein the bottom of the foot and the side portion are joined so that the entire invisible sock has a substantially flat shape in a side view. The invisible sock according to any one of claims 1 to 3, wherein the sole of the foot includes: an inner base that is in contact with the foot; and an outer base that covers the inner base. The invisible sock according to claim 4, wherein the inner base and the outer base are made of different materials. The invisible sock according to any one of claims 1 to 3, wherein the joint portion of the bottom of the foot and the side portion is located on the sole side of the foot. The invisible sock according to any one of claims 1 to 3, further comprising: a joining member that seamlessly joins the outer peripheral portion of the bottom of the foot and the outer peripheral portion of the side surface. The invisible sock according to claim 7, wherein the bottom of the foot and the side surface are not overlapped with each other, but are joined by the joining member. The invisible sock according to any one of claims 1 to 3, wherein the stretchable base is made of a free-cut base. A manufacturing method of invisible socks, which includes: The step of forming the sole of the foot, which forms the sole of the foot covering the sole of the foot; The side part forming step is to form a side part, and the side part covers the toe and heel of the foot, and both sides of the foot from the toe to the heel; The joining step is to join the bottom of the foot and the side surface by a joining method other than sewing; In the aforementioned side part forming step, the stretchable base is cut, and the aforementioned side part having an opening that becomes a wearing port and having a substantially flat and seamless loop shape is formed; or, In the aforementioned side part forming step, the elastic bases are joined by a joining method other than sewing to form the ring-shaped side part; and the ring-shaped side part has an opening that becomes a wearing port and is substantially flat. , And has a seam at a position other than the heel portion corresponding to the rear end of the aforementioned heel. The method for manufacturing an invisible sock according to claim 10, wherein, in the joining step, the bottom of the foot and the side surface are not overlapped with each other, and the bottom of the foot and the side are joined by a belt-shaped joining member. The aforementioned side part. The method of manufacturing an invisible sock according to claim 10, wherein, in the joining step, the bottom of the foot is joined by heat fusion so that the outer peripheral portion of the bottom of the foot and the peripheral part of the side portion overlap with each other With the aforementioned side part. The method of manufacturing an invisible sock according to claim 10, wherein in the joining step, the bottom of the foot is joined by an adhesive so that the outer peripheral part of the bottom of the foot and the peripheral part of the side part overlap with each other With the aforementioned side part.

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