JP4788702B2 - Footwear and its insole and cushion for insole - Google Patents

Description

The present invention relates to footwear such as sandals and shoes, an insole thereof, and a cushion material used for the insole.
In addition, in the present invention, “insole” of footwear includes, in addition to those used by joining to the sole or the inside, etc., those used by being inserted into the footwear, that is, insole. Shall be included.

  2. Description of the Related Art Footwear in which a cushioning material is provided on an insole has been conventionally known in order to reduce an impact on a sole caused by walking or the like and improve comfort.

Various proposals have been made for the cushion material for the insole of such footwear, and the following is known as one of them. That is, a cushioning material made of a flexible material and having a hollow portion filled with a liquid, the hollow portion being formed in a portion corresponding to the heel of the sole, a rear upper bulging chamber; It is composed of a front upper bulging chamber formed at a portion corresponding to the foot stepping portion and a passage communicating the front and rear upper bulging chambers. This cushion material is used, for example, by being joined to the lower surface of an insole body having a through hole for allowing the upper bulging chambers of the front and rear portions to protrude from the upper surface of the insole (see Patent Document 1 below).
According to the footwear in which the cushion material is provided on the insole, the impact applied to the heel portion and the stepping portion of the sole with walking or the like is mitigated by the elastic deformation of the upper bulging chamber in which the liquid has entered. The In particular, in the case of the cushion material, the upper bulging chambers in the front and rear portions are communicated with each other by a passage, so that the liquid moves back and forth in the hollow portion according to the movement of the load, so that the size of the upper bulging chamber is Increase or decrease, so that a better buffering effect can be obtained.

However, in the case of the cushion material described above, when one of the upper and lower upper bulging chambers is compressed by a load with walking or the like, the size of the other upper bulging chamber that is expanded by the movement of the liquid increases. On the other hand, there is a possibility that the sole of the foot is uncomfortable. On the other hand, if each upper bulging chamber is set to a size that does not cause uncomfortable feeling during expansion, there is a risk that a sufficient buffering effect cannot be obtained.
In addition, when the upper bulging chambers are provided at the two front and rear positions corresponding to the collar and the stepping portion as in the cushion material, each upper bulging chamber is caused by a slight movement of the center of gravity when standing. Compressed or expanded, it is difficult to maintain a balance, and the vertical and horizontal arches of the soles are liable to collapse, which may increase the fatigue of the feet.
Utility Model Registration No. 3041986

  An object of the present invention is to provide a cushioning material for an insole of footwear that can effectively relieve an impact on a sole without giving a sense of incongruity to the sole and can reduce foot fatigue. It is in.

  The cushion material for the insole of the footwear according to the present invention is made of a flexible material and has a hollow portion in which a fluid is sealed, and the hollow portion is formed in a portion corresponding to the sole of the foot. A first upper bulging chamber, a second upper bulging chamber formed in a portion corresponding to the vicinity of the second to fourth metatarsal bottoms of the sole, and a portion corresponding to the stepping portion of the sole A third upper bulging chamber, a rear passage communicating the first upper bulging chamber and the second upper bulging chamber, a second upper bulging chamber and a third upper bulging It is characterized by comprising a front passage that communicates with the chamber.

In the cushioning material of the present invention, the following effects can be obtained by providing it on the bottom of the footwear.
That is, first, when the rear part of the footwear comes into contact with walking or the like, a load is applied to the buttocks of the sole, and at this time, the first upper bulging chamber is elastically deformed in the compression direction, thereby causing the sole to slip. The impact on the bag is reduced. Due to the compression of the first upper bulging chamber, the fluid therein moves to the second upper bulging chamber through the rear passage and then further to the third upper bulging chamber through the front passage, thereby The second and third upper bulging chambers expand.
Next, when trying to kick the ground with the front part of the footwear, a load is applied to the stepping part of the sole (= near the base of the toe), but at this time, the third upper bulging chamber is in the compression direction. Elastically deforms, thereby mitigating the impact on the stepped part of the sole. At this time, the third upward bulging chamber also functions as a protrusion for hooking the toes, whereby the kicking-out operation is performed more smoothly. Due to the compression of the third upper bulge chamber, the fluid therein moves to the second upper bulge chamber through the front passage and then to the first upper bulge chamber through the rear passage, thereby The first and second upper bulging chambers expand.
As described above, according to the cushion material of the present invention, the first to third upper bulging chambers sequentially repeat the compression and expansion in accordance with the operation such as walking, so that the impact to the sole is effectively prevented. Alleviated.
In the case of the cushion material of the present invention, since three upper bulging chambers are arranged in the front-rear direction, one of the first and third upper bulging chambers is compressed by a load with walking or the like. In this case, since the fluid moving from here is dispersed in the other upper bulging chamber and the second upper bulging chamber, the size of these expanded upper bulging chambers becomes too large and the foot sole feels strange. There is no risk of giving.
Furthermore, according to the cushioning material of the present invention, when standing, the second upper bulging chamber supports the vicinity of the second to fourth metatarsal soles of the sole, so that it is easy to maintain a balance. The vertical and horizontal arches on the soles are less likely to collapse, reducing foot fatigue.

  In the cushion material for the insole of footwear according to the present invention, the fluid enclosed in the hollow portion is not particularly limited, and may be appropriately selected from gas, liquid, gel, etc., but productivity, cost In consideration of safety and the like, air is preferably used.

  In the footwear cushioning material according to the present invention, two third upper bulging chambers are formed side by side so as to communicate with each other, and the front passages are respectively connected to the second upper bulging chamber and the left and right. It is preferable to branch into two so as to communicate with the third upper bulging chamber on the other side.

  In the case of the above aspect, the left and right third upper bulging chambers are immediately compressed or expanded in accordance with the change in the load applied to the left and right sides of the stepping portion on the sole, so that the shock to the stepping portion can be more reliably applied. Can be relaxed.

  The cushioning material for the insole of footwear according to the present invention may be formed by overlapping and joining a flat lower surface sheet and an upper surface sheet having an upward convex molding portion for forming a hollow portion. .

In the above case, a cushioning material is obtained by preparing two sheets of upper and lower sheets, applying a required molding process to one of them, and then superimposing and bonding them together, so that manufacturing is easy and costs are reduced. be able to.
In this case, the fluid sealed in the hollow portion is air that does not require any special sealing means.
As the upper surface sheet and the lower surface sheet, a thermoplastic soft resin sheet or a flexible composite sheet having at least one surface made of a thermoplastic resin layer is usually used, and the sheets are joined by heat sealing. However, the material and joining means of the sheet are not limited to these, and other appropriate materials can be used.

  The configuration of the insole of the footwear provided with the cushion material according to the present invention is not particularly limited, but as one aspect thereof, the cushion of the present invention is provided between an insole core and a flexible insole epidermis covering the upper surface thereof. In some cases, a material is interposed.

  Since the cushion material is interposed between the insole core and the insole skin in the insole of the footwear of the above aspect, the conventional insole components can be used, and the manufacture is also easy. is there. Moreover, since the cushion material is not exposed on the surface of the insole, for example, when used as an insole such as a sandal, the appearance is not damaged by the cushion material. The insole of this aspect is usually joined to the bottom or the inside by bonding or the like.

  In the insole of the footwear of the above aspect, a cushion material accommodating recess having a depth substantially equal to the thickness of a portion other than the hollow portion in the cushion material is preferably formed on the upper surface of the midsole core.

  If the concave portion as described above is formed on the upper surface of the insole core, only the portion corresponding to the first to third upward bulging chambers of the cushion material on the surface of the insole skin bulges upward. When worn, there is no risk of discomfort and comfort is not impaired.

  As another aspect of the midsole of the footwear provided with the cushion material of the present invention, the cushion material of the present invention is joined to the lower surface of the midsole body made of a soft foam resin, In some cases, the first to third upper bulging chambers may have first to third upper convex cup portions in which the first to third upper bulging chambers are respectively accommodated.

The insole of the footwear of the said aspect is used as an insole | insert used by inserting in a footwear. Since the insole is composed of the insole body and a cushion material joined to the bottom surface thereof, the manufacture is easy and the cost is low. Further, since the cushion material is not exposed on the surface of the insole, the appearance is not impaired, and the first to third upward swelling of the cushion material on the lower surface side of the first to third cup portions in the insole body. Since the exit chambers are respectively accommodated, the relief of the impact due to the compression / expansion of each upper bulge chamber functions reliably.
In the above, the “soft foam resin” that constitutes the insole body includes not only a single substance but also a laminate of another sheet-like material (for example, cloth) on the main material made of the soft foam resin. And

  In the insole of the footwear of the second aspect, a recess for accommodating a portion of the cushion material other than the first to third upper bulging chambers is provided on the lower surface of the insole main body. It is preferable that it is formed continuously with the part.

  If the concave portion as described above is formed at a required position on the bottom surface of the insole body, a portion other than the upper bulging chamber in the cushion material does not appear as a step on the insole surface. There is no fear and comfort is not impaired. Further, since the bottom surface of the concave portion and the upper surface portion of the cushion material accommodated in the concave portion may be bonded together by bonding or the like, the bonding operation can be easily performed.

  Moreover, the footwear provided with the insole with a cushion material of the aspect mentioned above is contained in this invention.

  According to the footwear of the present invention, the same effects as those described above for the cushion material and the insole can be obtained.

  1 to 7 show a first embodiment of the present invention. In this embodiment, the present invention is applied to the inner bottom of a sandal. In these figures, the one for the left foot is shown.

  As shown in FIGS. 1 to 3, the midsole (4) of the sandal of the present embodiment has a cushion material (5) between the midsole core (41) and a flexible midsole skin (42) covering the top surface of the midsole core (41). ).

The cushion material (5) is made of a flexible material and has a hollow portion (5a) in which air is enclosed.
The hollow portion (5a) includes a first upper bulging chamber (511) formed in a portion corresponding to the heel of the sole and a portion corresponding to the vicinity of the second to fourth metatarsal bottom of the sole. The formed second upper bulging chamber (512), the third upper bulging chamber (513) formed in the portion corresponding to the stepping portion of the sole, and the first upper bulging chamber (511) And a rear passage (521) that communicates with the second upper bulging chamber (512), and a front passage that communicates between the second upper bulging chamber (512) and the third upper bulging chamber (513). (522).
Two third upper bulging chambers (513) are formed side by side so as to communicate with each other, and the front passage (522) is formed between the second upper bulging chamber (512) and each of the left and right sides. It branches into two left and right so as to communicate with the third upper bulging chamber (513) on the side.

In this cushion material (5), a flat lower surface sheet (501) and an upper surface sheet (502) having an upper convex shaped portion (502a) for forming a hollow portion (5a) are overlapped and joined. It is formed by.
Each of the sheets (501) and (502) is made of a thermoplastic thermoplastic resin sheet, and is cut into a required identical shape so as to overlap each other. The thickness of each of the sheets (501) and (502) is not particularly limited, but is preferably about 0.3 to 1 mm in consideration of the pressure strength and the buffer function.
The molding part (502a) of the upper surface sheet (502) is formed, for example, by subjecting a thermoplastic soft resin sheet to pressure molding with a mold under heating and then naturally cooling.
The upper sheet (501) and the lower sheet (502) are joined by heat sealing.
The joint portion (5b) between the sheets (501) and (502) is formed around the hollow portion (5a), and the width thereof is, for example, about 5 mm on average. In addition, the joints (2) between the sheets (501) and (502) are also formed at the locations surrounded by the second and third upper bulging chambers (512) (513) and the front passage (522) branched into two. 5b) is formed.
In this embodiment, air is naturally enclosed between the two sheets (501) and (502) by joining the upper sheet (501) and the lower sheet (502) using a normal heat sealing means. It has become. Accordingly, there is no need for a special fluid sealing step or sealing means, and there are advantages that manufacturing is easy and cost is low.

Of the hollow portion (5a) of the cushion material (5), the first to third upper bulging chambers (511), (512), and (513) are all dome having a flat bottom surface and a gentle top surface. It has become a shape. The first upper bulge chamber (511) has a substantially teardrop shape with the front side being thinner than the plane. The second upper bulging chamber (512) has a substantially teardrop shape with the rear side being thinner than the plane. The third upper bulging chambers (513) are each substantially circular as viewed from the plane, and are arranged slightly diagonally along the lateral width direction of the stepping portion of the sole.
The rear passage (521) and the left and right front passage (522) each have a substantially bowl-shaped cross section, and are close to a straight line when viewed from the plane, and the height thereof Is about ½ to の of the height of the first to third upper bulging chambers (511) (512) (513).

The insole core (41) is usually composed of a laminate in which a plurality of sheet-like materials are overlapped and joined. More specifically, the insole core (41) includes, for example, a paperboard (411), a cotton cloth (not shown) bonded to the lower surface of the paperboard (411), and a soft material bonded to the upper surface of the paperboard (411). And a foamed resin sheet (412).
On the upper surface of the midsole core (41), a cushion material accommodating recess (413) having a depth substantially equal to the thickness of the portion other than the hollow portion (5a) in the cushion material (5), that is, the joint portion (5b). Is formed. The planar shape of the recess (413) substantially matches the contour shape of the cushion material (5). For example, when the insole core (41) is formed of a laminated body made of paperboard (411), cotton cloth, and a soft foamed resin sheet (412), the concave portion (413) is a soft material that forms the upper surface. The foamed resin sheet (412) can be formed by providing a cutout (412a) having a required shape in advance.
The lower surface of the cushion material (5) is preferably bonded to the bottom surface of the recess (413) in the insole core (41) by adhesion or the like, and is fixed so as not to be misaligned during use.
By accommodating and fixing the cushion material (5) in the recess (413) of the insole core (41), only the portion corresponding to the hollow part (5a) protrudes upward from the upper surface of the insole (4). As a result, there is no step which may give an uncomfortable feeling when worn, and excellent comfort is obtained.

  The insole skin (42) covers from the upper surface of the insole core (41) to the peripheral edge of the lower surface, and is joined to these portions by adhesion or the like. Accordingly, the cushion material (5) accommodated in the recess (413) on the upper surface of the midsole core (41) is also covered with the midsole skin (42). The insole skin (42) is made of, for example, cloth, synthetic leather, a vinyl sheet, or the like.

  FIG. 4 shows a sandal (1) having the above-mentioned insole (4). The sandal (1) is composed of a sandal bottom (2) in which the midsole (4) is joined to a main bottom (3), and a sandal band (6) attached to the sandal bottom (2). Has been. The sandal band (6) has a suspension margin (not shown) on both right and left edges sandwiched between and joined between the bottom (3) and the midsole (4). And integrated. In addition, the structure and material of this bottom (3) and a sandal band (6) are not specifically limited, A suitable thing can be used.

When the above sandals (1) are worn, the following effects are exhibited.
That is, first, when the heel portion of the sandal bottom (2) comes into contact with walking, a load is applied to the heel portion of the sole. At this time, as shown in FIG. The upper bulging chamber (511) is elastically deformed in the compression direction, thereby reducing the impact on the sole of the foot. The compression of the first upper bulging chamber (511) causes the air inside thereof to move to the second upper bulging chamber (512) through the rear passage (521) and then through the front passage (522). 3 and the second and third upper bulging chambers (512) and 513 are expanded.
Next, when trying to kick the ground with the front part of the sandal bottom (2), a load is applied to the stepping part of the sole (= the vicinity of the base of the toe), as shown in FIG. The third upper bulging chamber (513) of the cushion material (5) is elastically deformed in the compression direction, thereby reducing the impact on the stepped portion of the foot. Here, two third upper bulging chambers (513) are provided side by side so as to communicate with each other, and each of them is provided with a second upper bulging chamber (522) via a front passage (522). 512), it immediately compresses or expands according to the change of the load applied to the left and right sides of the stepping portion on the sole, and the impact on the stepping portion on the sole is more accurately mitigated. At this time, the third upward bulging chamber (513) also functions as a protrusion for hooking the toes and plays a role of supporting the kicking-out operation. The compression of the third upper bulging chamber (513) causes the air inside thereof to move to the second upper bulging chamber (512) through the front passage (522) and then through the rear passage (521). 1 to the upper bulging chamber (511), whereby the first and second upper bulging chambers (511) (512) are expanded.
As described above, the first to third upper bulging chambers (511), (512), and (513) sequentially repeat compression and expansion along with the walking motion, so that the impact on the sole is effectively reduced. The

  Moreover, since the 1st thru | or 3rd upper expansion chamber (511) (512) (513) is provided along with the front-back direction, the cushion material (5) is provided with 1st and 3rd with walking. When one of the upper bulging chambers (511) and 513 is compressed by a load, the air moving from here is dispersed into the other upper bulging chamber and the second upper bulging chamber (512). Is done. Therefore, unlike the prior art described at the beginning, the size of the expanded upper bulging chamber is not too large, and there is no possibility of giving a sense of incongruity to the sole, and the comfort is good.

  Further, when standing while wearing the sandal (1), as shown in FIG. 7, a larger load is applied to the first upper bulging chamber (511) and the third upper bulging chamber (513). Since (weight) is applied, it is considered that the air flows most into the second upper bulging chamber (512) and the chamber (512) expands the most. Accordingly, the second upper bulging chamber (512) that has been expanded supports the vicinity of the bottom of the second to fourth metatarsals of the sole from the bottom. The arch is easy to form and hold.

  That is, according to the sandal (1) of this embodiment, the cushion material (5) provided on the insole (4) can effectively relieve the impact on the sole caused by walking or the like. At the same time, a comfortable comfort can be obtained without giving a sense of incongruity to the sole, and since the vertical arch and the lateral arch of the sole are formed and maintained, chronic fatigue of the foot can be reduced.

  8 to 11 show a second embodiment of the present invention. In this embodiment, the present invention is applied to the insole of a shoe. In these figures, the one for the left foot is shown.

As shown in FIGS. 8 to 10, the insole (4A) of the shoe of the second embodiment is formed by bonding the cushion material (5) to the lower surface of the insole body (43).
The cushion material (5) is substantially the same as the cushion material (5) of the first embodiment shown in FIGS.
The insole body (43) is made of soft foam resin, and the first to third upper bulging chambers (511), (512), and (513) of the cushion material (5) are accommodated therein. 3 upper convex cup portions (431) (432) (433). A rising portion (435) is formed at the rear peripheral edge of the insole body (43). A covering material (44) made of cloth or the like is joined to the upper surface of the insole body (43).
A recess (434a) for accommodating a portion of the cushion material (5) other than the first to third upper bulging chambers (511) (512) (513) on the lower surface of the insole body (43). (434b) is formed continuously to the first to third cup portions (431), (432), and (433). The recesses (434a) and (434b) have substantially the same depth as the thickness of the portion of the cushion material (5). Therefore, the depth of the recess (434a) in the portion that accommodates the rear passage (521) and the front passage (522) is the same as that of the recess (434b) that accommodates the joint (5b) between the sheets (501) and (502). It is slightly larger than the depth.
The upper surface of the portion of the cushion material (5) is joined to the bottom surface of the recesses (434a) and (434b) of the insole body (43) by adhesion or the like.

  FIG. 11 shows a shoe (11) having the above-mentioned insole (4A). The shoe (11) includes a shoe sole (12), an upper (13) attached to the shoe sole (12), and the insole (4A) inserted into the shoe (1). That is, in this embodiment, the insole (4A) is used as an insole. In addition, the structure and material of a shoe sole (12) and upper (13) are not specifically limited, A suitable thing can be used.

According to the shoe (11) of this embodiment, substantially the same effect as the sandal (1) of the first embodiment is exhibited.
In addition, in this embodiment, since the insole (4A) is composed of the insole body (43) and the cushion material (5) joined to the lower surface thereof, the manufacture is easy and the cost is also suppressed. be able to.
Further, since the cushion material (5) is not exposed on the surface of the insole (4A), there is no possibility that the appearance is impaired, and the first to third cup portions (431) (432) in the insole body (43). Since the first to third upper bulging chambers (511) (512) (513) of the cushion material (5) are accommodated on the lower surface side of (433), the upper bulging chambers (511) (512) The impact mitigation function by compression / expansion of (513) works reliably.
Furthermore, the recessed part (434a) (434b) for accommodating parts other than the upper bulging chamber in cushion material (5) is formed in the lower surface of an insole main body (43), The above-mentioned of cushion material (5) Since the portion does not appear as a step on the upper surface of the midsole (4A), there is no possibility of giving a sense of incongruity when worn, and comfort is not impaired. In addition, since the bottom surfaces of the recesses (434a) and (434b) and the top surface portion of the cushion material (5) accommodated in the recesses (434a) and (434b) may be joined by bonding or the like, the joining work is also simple.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a first embodiment of the present invention, with a part of an insole cut away. It is a longitudinal cross-sectional view of the insole along the II-II line of FIG. It is a disassembled perspective view of the bottom of FIG. It is a perspective view which shows the sandal provided with the inner bottom of FIG. It is a side view which shows the state of an insole when the collar part of a sandal bottom contacts. It is a side view which shows the state of an insole at the time of kicking out the ground with the front part of a sandal bottom. It is a side view which shows the state of the insole when standing. FIG. 9 is a plan view showing a second embodiment of the present invention, with a part of the insole cut away. It is a longitudinal cross-sectional view of the insole along the IX-IX line of FIG. FIG. 9 is an exploded perspective view of the middle bottom of FIG. 8. It is a perspective view which shows the shoes provided with the insole of FIG.

Explanation of symbols

(1): Sandals (11): Shoes (4) (4A): Insole (41): Insole core (413): Cushion material accommodating recess (42): Insole skin (43): Insole body ( 431): first upper convex cup portion (432): second upper convex cup portion (433): third upper convex cup portion (434a) (434b): concave portion (5): cushion material ( 501): Lower surface sheet (502): Upper surface sheet (502a): Upper convex shaped part (5a): Hollow part (511): First upper bulging chamber (512): Second upper bulging chamber (513 ): Third upper bulging chamber (521): Rear passage (522): Front passage

Claims (4)

Cushion material ( 5a) made of a flexible material and having a hollow portion (5a) enclosing a fluid between the midsole core (41) and a flexible midsole skin (42) covering the upper surface of the midsole core (41) ) In the middle of the footwear
The cushion material (5) overlaps and joins the flat lower surface sheet (501) and the upper surface sheet (502) having the upper convex shaped portion (502a) for forming the hollow portion (5a). Formed,
A hollow portion (5a) is formed in a portion corresponding to the vicinity of the first upper bulging chamber (511) formed in a portion corresponding to the heel of the sole and the vicinity of the second to fourth metatarsal bottom of the sole. The formed second upper bulging chamber (512), the third upper bulging chamber (513) formed in the portion corresponding to the stepping portion of the sole, and the first upper bulging chamber (511) And a rear passage (521) that communicates with the second upper bulging chamber (512), and a front passage that communicates between the second upper bulging chamber (512) and the third upper bulging chamber (513). (522) and
The rear passage (521) and the front passage (522) have a height of about ½ to ３ of the height of the first to third upper bulging chambers (511) (512) (513). And
A cushion material accommodating recess (413) having a depth substantially equal to the thickness of the joint (5b) between the sheets (501) and (502) in the cushion material (5) is formed on the upper surface of the midsole core (41). The insole of footwear, characterized by The lower surface of the bottom body (43) in made of soft foamed resin, made of a flexible material, cushioning material has a hollow portion in which the fluid is sealed with (5a) (5) is in the footwear ing joined At the bottom,
The cushion material (5) overlaps and joins the flat lower surface sheet (501) and the upper surface sheet (502) having the upper convex shaped portion (502a) for forming the hollow portion (5a). Formed,
A hollow portion (5a) is formed in a portion corresponding to the vicinity of the first upper bulging chamber (511) formed in a portion corresponding to the heel of the sole and the vicinity of the second to fourth metatarsal bottom of the sole. The formed second upper bulging chamber (512), the third upper bulging chamber (513) formed in the portion corresponding to the stepping portion of the sole, and the first upper bulging chamber (511) And a rear passage (521) that communicates with the second upper bulging chamber (512), and a front passage that communicates between the second upper bulging chamber (512) and the third upper bulging chamber (513). (522) and
The rear passage (521) and the front passage (522) have a height of about ½ to ３ of the height of the first to third upper bulging chambers (511) (512) (513). And
The insole main body (43) is provided with first to third upper convex cup portions (first to third upper protruding cup portions (511), 512, and 513) for receiving the first to third upper bulging chambers (511), (512), and (513), respectively. 431), (432), and (433), and the rear passage (521), the front passage (522), and the seats (501) and (502) in the cushion material (5) are formed on the lower surface of the insole body (43). ) The concave portions (434a) and (434b) for accommodating the joint portions (5b) between the first to third cup portions (431), (432), and (433) are formed. To the bottom of the footwear. Two third upper bulging chambers (513) are formed side by side so as to communicate with each other, and a front passage (522) is formed on the left and right sides of the second upper bulging chamber (512). The insole of footwear according to claim 1 or 2, characterized in that it branches into two so as to communicate with the third upper bulging chamber (513). Footwear comprising an insole (4) (4A) according to any one of claims 1 to 3 .

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