CN212520815U

CN212520815U - Socks cover

Info

Publication number: CN212520815U
Application number: CN202021693510.9U
Authority: CN
Inventors: 原进; 滨崎直视
Original assignee: Okamoto Corp
Current assignee: Okamoto Corp
Priority date: 2019-08-29
Filing date: 2020-08-14
Publication date: 2021-02-12
Anticipated expiration: 2030-08-14
Also published as: CN112438442A; JP2021031822A; JP7302861B2; TWM605025U; WO2021039156A1; TW202112260A

Abstract

The sock (1) according to one aspect of the present invention includes a strong expansion portion (5), one end (5a) of which is connected to the peripheral portion of the wearing hole (3a), and which extends from the one end (5a) to the sole portion (21) while inclining in a direction close to the toe portion (31), and the strong expansion portion (5) stretches the heel portion (32) toward the toe portion (31) when the metatarsophalangeal joint of the foot (F) flexes.

Description

Socks cover

Technical Field

The present invention relates to a sock worn on a foot, and more particularly, to a sock that reduces shifting or falling off due to walking or other movements.

Background

In recent years, socks that reduce the tendency of falling off during walking have been widely distributed in the market. These socks are often provided with a slip-proof or a fabric-attaching portion at the wearing opening or the heel portion to increase frictional resistance or to provide a stopper function. Or by forming a region in which the stretchability is partially reduced in the sock to improve the feeling of holding.

As a person who reduces the slipping-off of the sock during walking, for example, as described in patent document 1, the toe portion may be lifted upward by a tape that joins the toe portion and the sole portion. As described in patent document 2, a stretchable narrow fabric may be provided along the peripheral edge portion of the wearing opening. As described in patent document 3, a tightening portion having a high tightening force may be provided in the periphery of the heel portion (a portion from the sole to the achilles tendon portion).

Documents of the prior art

Patent document

Patent document 1 japanese laid-open patent publication "japanese patent laid-open No. 2019-31752"

Patent document 2 Japanese laid-open patent publication "Japanese patent laid-open publication No. 2019-35159"

Patent document 3 japanese laid-open patent publication "japanese patent No. 5197905"

SUMMERY OF THE UTILITY MODEL

Problem to be solved by the utility model

During walking, when the metatarsophalangeal joint located on the toe side of the foot is flexed (in a state where only the toe side lands and the heel side floats), friction is generated between the sock and the shoe, thereby generating heel displacement. The repeated walking increases the displacement of the heel, which is considered to be a cause of the sock falling off. Therefore, in order to effectively reduce the falling of the sock, particularly when the metatarsophalangeal joint is flexed, it is important to improve the adhesion (putting on pressure) of the foot to the heel.

As described above, the slip-off of the sock is considered to be caused by the heel shift in many cases. However, in the structure in which the toe portion is lifted upward as described in cited document 1, the effect of reducing the heel portion from coming off is not sufficiently obtained. Further, since the toe portion lifting action is exerted even when the metatarsophalangeal joint is not flexed (in a state where the toe side and the heel side are grounded), the foot tightening action is always exerted.

In addition, in the configuration in which a stretchable narrow fabric is provided along the peripheral edge portion of the wearing opening as described in patent document 2, the wearing opening is particularly susceptible to feeling of foreign matter or binding, and therefore the wearing feeling is affected. In addition, the adhesion of the sock to the shoe leaves a trace of the thick portion of the stretchable narrow fabric on the foot, which may cause itching or skin roughness.

In addition, in the configuration in which the tightening portion is provided around the heel portion as described in reference 3, although the offset of the heel portion is reduced, the tightening action on the foot is always exerted. Therefore, the heel is always held when the metatarsophalangeal joint is not flexed. Therefore, stress due to a feeling of pressure on the foot, or stuffiness in summer due to a state of adhesion, rough skin, or the like may be caused.

In view of the above, an object of one aspect of the present invention is to provide a sock that can reduce shifting or falling off due to movement such as walking while suppressing a sense of tightness when the metatarsophalangeal joints do not flex (extend).

Means for solving the problems

In order to solve the problem, an aspect of the present invention provides a sock cover including: a sole portion covering a sole of the foot; a stretchable side surface portion including a toe portion and a heel portion and having an opening portion to be a wearing opening; and a strong stretchable portion having a lower stretchability than the side portion, one end of which is located at a peripheral portion of the opening portion, and which extends from the one end toward the sole portion while being inclined in a direction approaching the toe portion; the strong stretchable portions are disposed on both sides of the side surface portion in the width direction, and stretch the heel portion toward the toe portion when the metatarsophalangeal joint of the foot is flexed.

Effect of the utility model

According to an aspect of the present invention, it is possible to provide a sock that can reduce shifting or falling off due to an action such as walking while suppressing a sense of tightening when the metatarsophalangeal joint is not flexed.

Drawings

Fig. 1 is a perspective view showing a state in which a sock according to embodiment 1 of the present invention is worn on a foot.

Fig. 2 is a medial side view of the foot showing the state in which the sock is worn on the foot.

Fig. 3 is an exploded view showing the fabric pattern constituting the sock.

Fig. 4 is a side view showing the frame of the foot when the metatarsophalangeal joint is flexed.

Fig. 5 is a bottom view showing the skeleton of the foot when the foot is viewed from the inside.

Fig. 6 is a side view of the inside of the foot for explaining the position of the strong stretch portion included in the sock.

Fig. 7 is a medial side view of the foot showing the state of the foot during walking.

Fig. 8 is a medial side view of the foot showing the state of the sock when the metatarsophalangeal joint is not flexed (extended).

Fig. 9 is a medial side view of the foot showing the state of the sock when the metatarsophalangeal joint is flexed.

Fig. 10 is a medial side view of the foot for explaining a modification of the expansion and contraction portion.

Fig. 11 is a perspective view showing a state in which the sock according to embodiment 2 of the present invention is worn on a foot.

Detailed Description

Embodiment mode 1

Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 10. In the present embodiment, an example of applying the present invention to a sock having a left-right asymmetric shape according to the shape of the left and right feet in order to improve the wearing feeling will be described.

(integral construction of sock)

Fig. 1 is a perspective view showing a state in which the ankle sock 1 of the present embodiment is worn on a foot (right foot) F. As shown in fig. 1, the sock 1 includes: a sole portion 2 covering the sole of the foot F, a side surface portion 3 covering the side peripheral surface of the foot F, and an anti-slip portion 4 and a strong stretch portion 5 for reducing the shift or the falling of the sock 1.

The sock 1 is a silk stocking in which the sole and a part of the side circumferential surface of the foot F are covered. The sock 1 may be formed such that a part of the toe or a part of the heel is exposed, for example. The sock 1 may be of a five-finger type or a cloth sock type with a finger pocket.

The side surface part 3 includes a toe part 31, a heel part 32, and a side edge part 33 from the toe part 31 to the heel part 32. The side surface 3 has a substantially elliptical wearing opening (opening) 3a for putting in and out the foot F, formed substantially at the center thereof. The wearing opening 3a is formed to be largely opened so that the instep and ankle of the foot F are exposed. Therefore, when the shoe is worn, the sock 1 is entirely hidden in the shoe.

In the present embodiment, the sock 1 is knitted by a knitting machine, and is formed by sewing a fabric constituting the sole portion 2 and a fabric constituting the side surface portion 3 (fabric type). Specifically, with respect to the sole portion 2 and the side surface portion 3, an outer peripheral portion of the fabric constituting the sole portion 2 and an outer peripheral portion of the fabric constituting the side surface portion 3 are joined by sewing. However, the sole portion 2 and the side surface portion 3 may be continuously knitted (knitting type) by a circular knitting machine for socks.

In the case of the fabric type, both the sole portion 2 and the side portion 3 preferably include an elastic fabric. For example, when the frictional resistance of the fabric constituting the sole portion 2 is low, slipping between the sole portion 2 and the sole of the foot F and slipping between the sole portion 2 and the sole occur during wearing, which leads to falling of the sock 1 and deterioration of the wearing feeling. Therefore, a spun yarn in which natural fibers are mixed, such as cotton blend, which has a moderately high frictional resistance and is soft to the skin, is suitable as a material for the fabric constituting the sole portion 2. However, the material of the fabric constituting the sole portion 2 is not limited thereto.

The material of the fabric constituting the side surface part 3 is not limited, but a rough cut fabric (free cut fabric) in which the cut end face does not fray is particularly preferably used. By using the cut-free fabric, it is no longer necessary to perform processing for preventing fraying on the peripheral edge portion of the wearing opening 3 a. Therefore, for example, it is possible to avoid a decrease in the wearing feeling when the fabric for preventing fraying is stuck to the peripheral edge portion of the wearing opening 3 a.

The side surface part 3 may be formed in a ring shape as the wearing opening 3a by cutting a piece of fabric into a circular shape, an elliptical shape, or the like and forming an opening. The side surface portion 3 may be formed in a ring shape by joining a plurality of materials such as a modified material to the toe portion 31 side and the heel portion 32 side.

The sole portion 2 and the side surface portion 3 may be joined by sewing, but the sole portion 2 and the side surface portion 3 may be joined by adhesion with a tape, thermal welding, or the like.

On the other hand, in the case of the knitting type, the sole portion 2 and the side surface portion 3 are continuously knitted by a circular knitting machine for socks. The sole portion 2 and the side surface portion 3 are continuously knitted with a number 32 single yarn (a spun yarn of 50% cotton and 50% acrylic) by a circular knitting machine for socks having 144 needles and a single needle cylinder, for example.

The anti-slip section 4 is a band-shaped (surface-shaped) anti-slip member having low stretchability and large frictional resistance (high friction coefficient with the skin) as compared with the fabric constituting the side surface section 3. The antiskid portion 4 is provided in a region on the inner surface of the heel portion 32, which is located below the ankle (lateral malleolus, medial malleolus) and on the back side of the heel. The nonskid portions 4 prevent the sock 1 from shifting or falling off from the foot F by coming into contact with the heel of the foot F.

The material of the non-slip portion 4 is not particularly limited as long as it has a higher frictional resistance than the fabric constituting the side surface portion 3. For example, various materials can be used in addition to a resin having a relatively large frictional resistance with the skin (a natural resin such as natural rubber, a synthetic resin such as silicone rubber or urethane rubber).

The strongly stretchable part 5 is a region or member having lower stretchability than the fabric constituting the side face part 3. The strong stretchable part 5 is less likely to stretch and has a higher contractive force than the fabric constituting the side surface part 3. The strong expansion portions 5 are disposed on both sides (both side edge portions 33) in the width direction of the side surface portion 3.

The strong expansion/contraction portion 5 acts to stretch the heel portion 32 toward the toe portion 31 when the metatarsophalangeal joint located on the toe side of the foot F flexes (a state where only the toe side lands and the heel side floats) during walking or other movements. Therefore, the heel portion 32 adheres to the skin, and the sock 1 is less likely to shift or fall off during walking.

When the metatarsophalangeal joint is flexed (refracted), the heel portion 32 is pulled toward the toe portion 31, and the slip prevention portion 4 provided on the inner surface of the heel portion 32 is pressed against the skin. Therefore, the slip prevention effect by the slip prevention portions 4 is improved, and the shift or the falling of the sock 1 during walking is more effectively reduced.

(constitution of Strong expansion part)

Fig. 2 is a side view of the inside of the foot F (right foot) showing the state in which the sock 1 is worn on the foot F. As shown in fig. 2, one end 5a of the strong expansion portion 5 is connected to the peripheral edge portion of the opening 3 a. The other end 5b of the strong expansion portion 5 opposite to the one end 5a is connected to the sole portion 2. The strong stretch portion 5 is inclined in a direction approaching the toe portion 31 side from the one end 5a, and extends linearly from the one end 5a toward the sole portion 2 side to reach the sole portion 2.

Fig. 3 is an exploded view showing the fabric pattern constituting the sock 1. 301 in fig. 3 indicates the fabric pattern (inner surface) of the sole portion 2. In addition, 302 of fig. 3 shows a fabric pattern (inner surface) of the first stretch fabric 3A including the toe portion 31 in the

side surface portion

3, and 303 of fig. 3 shows a fabric pattern (inner side) of the second stretch fabric 3B including the heel 32 in the side surface portion 3.

As shown in fig. 3, the side surface portion 3 includes: a first stretch fabric 3A including a toe portion 31, and a second stretch fabric 3B including a heel portion 32. The first stretch fabric 3A and the second stretch fabric 3B are joined in a joining region B where both end portions of each other overlap. In the ankle sock 1, the two linear band-shaped joining regions B function as the strongly stretchable portions 5.

The method of forming such a strong expansion portion 5 is not particularly limited, and it can be formed as follows. For example, an annular stretchable fabric constituting the side surface part 3 is prepared by designing the stretchable fabric to have a large size assuming that only the width overlapping in the joining region B is shortened, and cutting the stretchable fabric obliquely at the position where the strong stretchable part 5 is provided. Thereby, the first stretchable fabric 3A and the second stretchable fabric 3B are obtained. In addition, the position and the angle of inclination of the strong stretchable part 5 finally provided on the side surface part 3 can be adjusted by changing the position and the angle when the stretchable fabric is cut.

The obtained first stretch fabric 3A and second stretch fabric 3B are overlapped at the cut portion, and are thermally welded using resin or the like to join the first stretch fabric 3A and second stretch fabric 3B in the joining region B. The joining region B is a region where the two stretchable fabrics are thermally welded with resin or the like, and has a lower stretchability than the other regions of the side face 3. In this way, the band-shaped strong expansion/contraction portion 5 inclined in the direction approaching the toe portion 31 side and extending linearly from the one end 5a toward the sole portion 2 side can be formed on the side surface portion 3.

Further, the side surface part 3 may be provided with the strong stretchable part 5 by attaching a fabric or a sheet-like resin different from the fabric constituting the side surface part 3 to the side surface part 3 or the like with an adhesive or thermal fusion bonding. Alternatively, the side surface part 3 may be provided with the strong stretchable part 5 by applying resin to the side surface part 3 or the like by screen printing.

In the case where the strong stretchable part 5 including a fabric or a resin different from the fabric constituting the side face part 3 is provided in the side face part 3, the strong stretchable part 5 may be provided on any one of the inner surface and the outer surface (back and front) of the side face part 3. When wearing feeling is emphasized, the strong stretchable portions 5 may be provided on the outer surface (front surface) of the side surface portions 3, and when appearance is emphasized, the strong stretchable portions 5 may be provided on the inner surface (back surface) of the side surface portions 3. However, when the strong stretching portions 5 are provided on the inner surface of the side surface portion 3, the strong stretching portions 5 come into contact with the skin. Therefore, when the strongly stretchable portion 5 is provided on the inner surface of the side surface portion 3, it is preferable to avoid the use of a hard material or a plasticized adhesive which may cause a foreign body sensation when the sock 1 is worn.

The degree of stretchability of the strong stretchable part 5 is not particularly limited, and may be lower in stretchability than the fabric constituting the side surface part 3. However, if the stretchability of the strong stretchable portion 5 is too low, the contact with the muscle is increased, and a foreign body sensation is generated. Therefore, the strong stretchable part 5 preferably has a stretchability that is a contractive force of about 2 times or more and 5 times or less of the fabric constituting the side surface part 3. This can reduce the falling of the sock 1 without causing a feeling of foreign matter on the skin.

Fig. 4 is a side view showing the frame when the metatarsophalangeal joint of the foot (right foot) F is flexed. Fig. 5 is a bottom view showing the skeleton of the foot F when the foot (right foot) F is viewed from the instep. As shown in fig. 4 and 5, during walking, the first to fifth metatarsophalangeal joints, which are the joints between the first to fifth metatarsals and the proximal phalanges of the foot F, flex, and only the toe side of the foot F lands while the heel side floats. The strong expansion portion 5 is set in position so as to stretch the heel portion 32 toward the toe portion 31 when the first to fifth metatarsophalangeal joints are flexed as described above.

Fig. 6 is a medial side view of a foot (right foot) F for explaining the position of the strong stretch portion 5. As shown in fig. 6, a position of the strong stretch section 5 located most on the heel 32 side is defined as a first reference position P1, and a position of the strong stretch section 5 located most on the toe 31 side is defined as a second reference position P2.

In this case, in the medial side view of the foot F, the first reference position P1 is preferably located within a first horizontal section D1 (in the figure, the section D3+ the section D4 in the anteroposterior (longitudinal) direction of the foot F) including the area from the tibia anterior end to the calcaneus posterior end. The second reference position P2 is preferably located within a second horizontal section D2 (in the figure, a section D1+ a section D2+ a section D3 in the front-rear direction of the foot F) extending from the first metatarsal head (first metatarsal tip) to the rear end of the tibia of the foot F.

When the first reference position P1 is located closer to the toe portion 31 than the tibia distal end of the foot F, the force with which the strong expansion/contraction portion 5 stretches the heel portion 32 toward the toe portion 31 is weakened when the metatarsophalangeal joint flexes. In addition, the comfort of the skin and the fabric is relatively low in the peripheral portion of the wearing opening 3a of the side surface portion 3 corresponding to the concavity of the arch of the foot F (the portion located above the concavity of the arch of the foot F). When the first reference position P1 is included in the portion with low comfort, the strong stretch unit 5 is likely to come into contact with or rub against the skin during walking, thereby reducing the wearing feeling. Therefore, the strong expansion/contraction portion 5 is preferably disposed so that the first reference position P1 is located in the first horizontal section D1 from the anterior end of the tibia, in which the concavity of the arch of the foot becomes shallow, to the posterior end of the calcaneus.

Further, when the second reference position P2 is located on the toe portion 31 side of the first metatarsal head of the foot F, the first metatarsophalangeal joint involved in the walking motion may be hard to flex, and discomfort or hindrance may occur to the walking motion. Therefore, in order to hardly affect the flexion of the first metatarsophalangeal joint, in the medial side view of the foot F, the second reference position P2 is preferably located on the heel 32 side of the first metatarsophalangeal joint, i.e., on the heel 32 side of the first metatarsophalangeal joint of the foot F.

Further, the second reference position P2 is more preferably located within a third horizontal section D3 (in the figure, the section D2+ the section D3 in the front-rear direction of the foot F) extending from the first metatarsal sole to the posterior end of the tibia of the foot F. The force that pulls the heel portion 32 toward the toe portion 31 side is increased by the proximity of the second reference position P2 to the heel portion 32. In addition, by detaching from the first metatarsophalangeal joint, the influence on the flexion of the first metatarsophalangeal joint is reduced. Therefore, the second reference position P2 is more preferably located within the third horizontal section D3.

The one end 5a of the strong stretch portion 5 is only required to be located at the peripheral edge portion of the wearing opening 3a, and it is not necessary to reach the wearing opening 3 a. Similarly, the other end 5b of the strong expansion portion 5 need only be located in the vicinity of the sole portion 2, and need not reach the sole portion 2.

(Effect of Strong expansion part)

Fig. 7 is a medial side view of the foot (left foot) F showing the state of the foot F during walking. During walking, as shown at 701 in fig. 7, the foot F lands on the heel (a state where only the heel side lands and the toe side floats). From this state, as shown at 702 in fig. 7, the center of gravity moves toward the toe side of the foot F (a state where the toe side and the heel side land). Then, as shown in 703 of fig. 7, the person moves forward by stepping up the ground surface with the sole on the toe side (a state where only the toe side lands and the heel side floats).

Fig. 8 is a medial side view of the foot F showing the state of the sock 1 when the metatarsophalangeal joint is not flexed (extended). Fig. 9 is a medial side view of the foot F showing the state of the sock 1 when the metatarsophalangeal joint is flexed.

As shown in fig. 8, when the metatarsophalangeal joint is not flexed (for example, in the

states

701 and 702 in fig. 7), the strong stretch portion 5 has very little effect of stretching the heel portion 32 toward the toe portion 31. Therefore, as compared with the case where the tightening part having a high tightening force is provided along the peripheral edge of the wearing opening as in the related art, the heel of the foot F is not always held, and the function of fixing by a hem or the like is not exerted. Therefore, when the metatarsophalangeal joint is not flexed, the wearing feeling is not impaired by the strong stretch portion 5.

On the other hand, as shown in fig. 9, when the metatarsophalangeal joint is flexed, the tension force (in the figure, reference character "f") of the strong stretchable section 5 that stretches the heel section 32 toward the toe section 31 increases as the fabric constituting the side face section 3 is stretched in the front-rear direction. For example, when the foot F moves from the state shown by 702 to 703 in fig. 7, the body weight moves toward the toe and the heel gradually floats, as described with reference to fig. 7. As the heel floats up gradually, the fabric constituting the side surface portion 3 (side edge portion 33) is elongated in the front-rear direction together with the fabric constituting the sole portion 2. As the fabric constituting the side surface parts 3 extends in the front-rear direction, the strong stretching parts 5 act to contract, and the tensile force f increases.

The increase in the tensile force f increases the wearing pressure of the heel portion 32 on the skin, and suppresses the shift due to the walking motion and the shift due to the friction between the sock 1 and the shoe. Therefore, the strong stretch section 5 can reduce the falling of the sock 1 when the metatarsophalangeal joint is flexed. Further, as the strongly stretchable portion 5 is inclined toward the toe portion 31 side from the peripheral edge portion of the wearing opening 3a toward the sole portion 2, the wearing pressure of the fabric on the skin is increased particularly in the upper portion (near the wearing opening 3a) of the heel portion 32 protruding rearward. Therefore, the downward displacement and falling off of the material of heel portion 32 can be effectively reduced.

As described above, the tensile force f of the strong stretch portion 5 that stretches the heel portion 32 toward the toe portion 31 side increases and acts when the metatarsophalangeal joint is flexed, and the heel portion 32 is adhered to the skin. Therefore, according to the present embodiment, it is possible to realize the ankle sock 1 that can reduce the shift due to the movement such as walking while suppressing the feeling of tightness when the metatarsophalangeal joint is not flexed.

The strong expansion/contraction portion 5 is preferably disposed on both sides of the side surface portion 3 in the width direction, that is, on both left and right sides of the side surface portion 3, and stretches the heel portion 32 toward the toe portion 31 from both the left and right sides. With this, the heel portion 32 can be appropriately pulled toward the toe portion 31 as the fabric constituting the side surface portion 3 is extended in the front-rear direction when the metatarsophalangeal joint is flexed.

In addition, in order to improve the wearing feeling, the strong stretchable part 5 is formed in a left-right asymmetric shape in which the sole part 2 conforms to the shape of the foot F, and the shape of the side part 3 is also left-right asymmetric. Therefore, the large toe side strong expansion 5 is positioned slightly closer to the heel portion 32 than to the small toe side. However, the sole portion 2 and the side portion 3 do not necessarily have to be formed in a left-right asymmetric shape depending on the shape of the foot F, and may be formed in a left-right symmetric shape. In this case, the highly stretchable portion 5 is also preferably provided with left and right objects on the boundary of the center line in the length (front-rear) direction of the foot F in order to stretch the heel portion 32 toward the toe portion 31 with good left-right balance.

As described above, the strong stretch portion 5 increases the tensile force that pulls the heel portion 32 toward the toe portion 31 side as the fabric that forms the side surface portion 3 extends in the front-rear direction when the metatarsophalangeal joint is flexed. Therefore, the strong expansion part 5 need only be provided at least on the side surface part 3, and need not be provided on the sole part 2. However, the strong expansion part 5 may be provided on the sole part 2 in addition to the side surface part 3. The configuration in which the strong expansion portion 5 is also provided in the side surface portion 3 and the sole portion 2 is as described below.

(modification of Strong expansion portion)

Fig. 10 is a medial side view of the foot F for explaining a modification of the strong stretch portion 5. The shape, number, and the like of the strongly stretchable portions 5 are not particularly limited as long as they can substantially exhibit strong stretchability as compared to the fabric constituting the side face portion 3.

For example, as shown in 1001 of fig. 10, the strong expansion/contraction portion 5 may have a surface shape whose width changes from the one end 5a to the other end 5 b. In 1001 of fig. 10, the highly extensible part 5 is shown in a surface shape whose width increases from one end 5a toward the other end 5 b.

As shown by 1002 in fig. 10, the strong expansion and contraction portion 5 may have a linear shape. In 1002 of fig. 10, three parallel linear shape strong expansion portions 5 are shown.

As shown in 1003 of fig. 10, the strong expansion/contraction portion 5 may be an aggregate of dot shapes. In 1003 of fig. 10, the strong expansion/contraction part 5 of the spot-shaped aggregate in which the width of the region disposed from the one end 5a toward the other end 5b is increased is shown.

As shown at 1004 in fig. 10, the strong expansion/contraction portion 5 may have a plurality of band shapes. In 1004 of fig. 10, three parallel band-shaped (surface-shaped) strongly stretchable portions 5 linearly extending from one end 5a toward the other end 5b are shown.

As shown by 1005 in fig. 10, the inclination angle of the strong expansion/contraction portion 5 with respect to the sole portion 2 may be 45 degrees or more. As described above, the inclination angle of the strong expansion/contraction portion 5 can be set as appropriate as long as the one end 5a is located in the first horizontal section D1 and the other end 5b is located in the second horizontal section D2 on the toe portion 31 side of the one end 5 a.

In addition, the present invention can solve the problem of the present invention by including the strong expansion portions 5 on both sides of the side surface portion 3. For example, in the case of a configuration in which the one ends 5a of the strong stretch units 5 are connected to each other by a strong stretch unit disposed along the peripheral edge portion of the wearing opening 3a on the heel 32 side, the foot F can be fastened when the metatarsophalangeal joint is not flexed, as compared with the configurations illustrated in fig. 10 (configurations in which the one ends 5a are not connected to each other). However, even in the configuration in which the one ends 5a are connected to each other, the tensile force F caused by the strong stretchable section 5 increases when the metatarsophalangeal joint flexes, and therefore, the feeling of tightness with respect to the foot F when not flexed does not increase, and the shifting or falling of the sock can be reduced during walking.

Embodiment mode 2

Another embodiment of the present invention will be described with reference to fig. 11. For convenience of explanation, members having the same functions as those described in the above embodiments are given the same reference numerals, and the explanation thereof will not be repeated.

The sock of the present embodiment is mainly different from the sock of embodiment 1 described above in that the strongly stretchable portions disposed on both sides in the width direction of the side surface portion are connected to the sole portion.

(constitution of Strong expansion part)

Fig. 11 is a perspective view showing a state in which the ankle sock 11 of the present embodiment is worn on the foot F. As shown in fig. 11, the sock 11 is provided with a strong stretch portion 51 over the side surface portion 3 and the sole portion 2. The strong expansion portions 51 are formed such that the strong expansion portions 5 disposed on both sides of the side surface portion 3 are connected to each other by the sole strong expansion portion 6 disposed on the sole portion 2.

The method of forming such a strong expansion and contraction portion 51 is not particularly limited, and it can be formed, for example, as follows. For example, when the sock 11 is of a knitted type, the strong stretchable portion 51 can be formed by inserting a highly elastic yarn having high stretchability at the time of knitting into a position where the strong stretchable portion 51 is provided. Alternatively, the strong stretchable portion 51 may be formed by changing the loop structure of the strong stretchable portion 5 by reducing the loop density (knit loops) at the position where the strong stretchable portion 51 is provided, or by performing tuck knitting or the like at the position where the strong stretchable portion 51 is provided.

(Effect of Strong expansion part)

According to the strong stretchable part 51, when the metatarsophalangeal joint is flexed, the stretching force f of the strong stretchable part 51 that stretches the heel part 32 toward the toe part 31 increases as the fabric of the side face part 3 is stretched in the front-rear direction. Therefore, the wearing pressure of the heel portion 32 to the skin is increased, and the shift or the falling off of the sock 1 can be reduced.

In the strong stretching portions 51, the strong stretching portions 5 are connected by the sole strong stretching portions 6, and therefore, relative positional displacement of the respective strong stretching portions 5 is less likely to occur. Therefore, according to the present embodiment, the sock 11 that can reduce the shift and the fall-off due to the walking and the like for a long time can be realized.

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

Description of reference numerals

1. 11: socks cover

2: sole part

3: side surface part

4: anti-skid part

5. 51: strong expansion part

5 a: one end of

6: sole strong expansion part (strong expansion part)

31: toe part

32: heel part

3A: first stretch fabric

3B: second stretch fabric

D1: first horizontal interval

D2: second horizontal interval

D3: a third horizontal interval.

Claims

1. A sock cover, characterized by comprising:

a sole portion covering a sole of the foot;

a stretchable side surface portion including a toe portion and a heel portion and having an opening portion to be a wearing opening; and

a strong stretchable portion having a lower stretchability than the side portion, one end of which is located at a peripheral portion of the opening portion, and which extends from the one end toward the sole portion while being inclined in a direction approaching the toe portion; and is

The strong expansion/contraction portions are disposed on both sides of the side surface portion in the width direction, and stretch the heel portion toward the toe portion when the metatarsophalangeal joint of the foot is flexed.

2. The sock of claim 1,

in a medial side view of the foot,

when the position of the strong expansion part on the heel side is set as a first reference position and the position of the strong expansion part on the toe side is set as a second reference position,

the first reference position is located within a first horizontal interval encompassing from the anterior end of the tibia to the posterior end of the calcaneus of the foot,

and the second reference position is located within a second horizontal interval comprised from the first metatarsal head of the foot to the posterior end of the tibia.

3. The sock of claim 2,

in a medial side view of the foot,

the second reference position is located within a third horizontal interval comprised from the first metatarsal base of the foot to the posterior end of the tibia.

4. The sock of claim 1,

the strong expansion part is in a continuous surface shape.

5. The sock of claim 4,

the strong expansion portion is a band shape extending substantially linearly.

6. A sock according to any of claims 1 to 5,

the side surface portion has: a first stretch fabric comprising the toe portion and a second stretch fabric comprising the heel portion,

the strong stretch portion is formed by overlapping the first stretch fabric and the second stretch fabric.

7. A sock according to any of claims 1 to 5,

the side portion includes a freely cut fabric.

8. The sock of any of claims 1 to 5, further comprising:

and a slip prevention part provided on an inner surface of the heel part.

9. A sock according to any of claims 1 to 5,

the strong expansion portions respectively disposed on both sides of the side surface portion are connected to the sole portion.