JP5225560B2 - Warm foot cover - Google Patents

Description

  The present invention relates to a heat-insulating foot cover that can promote blood flow and keep a foot warm without imposing a burden on the foot.

Utility model registration No. 3006581 Utility model registration No. 3087115

  In a cold person or an elderly person, blood flow at the end of the body tends to deteriorate. If this is a foot, wear thick socks to keep the feet warm and not cool, but ordinary socks have poor heat retention. In order to improve the heat retaining property, there is one in which a heat retaining material is applied to socks (Patent Document 1). However, in the case of this sock, since the leg is tightened, there is a possibility that blood circulation is worsened. In addition, there is a slipper type for keeping warm without tightening the legs (Patent Document 2). Since this does not restrain the foot, it does not hinder blood circulation, but the foot is only partially warmed, not the whole. It is important to keep the entire foot warm for people who are prone to develop arteriosclerosis, such as those who are cold and have poor blood flow, and elderly people. In particular, elderly people and care recipients need to keep warm while maintaining good blood circulation when the amount of exercise is low, such as while sleeping or using a wheelchair.

  It is an object of the present invention to provide a heat-insulating foot cover that allows a cold person or an elderly person to keep warm feet easily and comfortably in daily life, and is less likely to cause bed slippage when worn while sleeping. Let it be an issue. It is another object of the present invention to provide a heat-insulating foot cover for self-support that can be worn by a care recipient without any help.

The heat insulation foot cover of the present invention (Claim 1) is three-dimensionally sewn into a boot shape including a short shoe portion into which a thick flexible fabric is inserted and a rising portion that rises in a cylindrical shape from the upper end of the short shoe portion. A foot cover for heat insulation that has a continuous series of surfaces from the back to the bottom through the bottom so that the buttocks and toes are seamless, and the left and right sides of the saddle It consists of a left side fabric and a right fabric that are stitched to the edge of the shoe and form a left side and a right side of the boot and the rising portion, respectively .

  Such a warming foot cover is made of a fiber in which the fabric is formed in a double layer by an inner covering and an outer covering, and carbon fine particles are supported in a storage portion formed by a gap between the inner covering and the outer covering. It is preferable that the thermal sheet is detachably housed (claim 2).

Further, it is more preferable that the rising portion is separated into a left front piece and a right front piece on the front side, and an engagement member is provided so that an overlap margin of the left and right front pieces can be adjusted (Claim 3) .

Also, the left and right front piece, extend the belt from the side end of the front piece coming outside, particularly preferably is provided with the engaging member to the front piece coming to the belt and inside (claim 4).

More preferably, the rising portion detachably engages the inner surfaces on the front side with the inner surfaces on the front side (Claim 5 ).

The engaging member is preferably a surface fastener (claim 6).

The thermal in sheet insulation for foot cover housing the said rising part, on its side, particularly preferably is provided an openable and closable insertion opening for inserting the thermal sheet to said storage portion (claim 7 ).

It is more preferable that such an insertion port is formed from the vicinity of the upper end of the rising portion to the portion corresponding to the ankle (claim 8 ).

In the case of the heat insulation foot cover of the present invention (Claim 1), a thick and flexible fabric is sewn, but the heel has no seam. Therefore, even if a bedridden person uses it, the foot is unlikely to slip. Further, when the heel of the foot is in full contact with the heel portion of the foot cover, there is no feeling of pressure or discomfort. In addition, since the heat insulation foot cover has a boot shape including a boot portion for inserting a foot and a rising portion that rises in a cylindrical shape from the upper end of the boot shoe portion, the foot cover extends from the toe of the foot to a position above the heel. Since the blood flow is less likely to be deteriorated while keeping a wide area at the same time, it is further less likely to cause bed slippage.

  In such a warming foot cover, the fabric is made of a fiber in which the fabric is formed in duplicate by an inner covering and an outer covering, and carbon fine particles are supported in a storage portion formed by a gap between the inner covering and the outer covering. When the thermal sheet is detachably housed (Claim 2), the foot is kept warm by the action of the charcoal fine particles of the thermal sheet and the blood flow can be made difficult to deteriorate. Therefore, bed slipping is less likely to occur.

  Since the thermal sheet is made of fiber carrying carbon fine particles, it has a sense of unity with the main body when stored in the storage unit. Therefore, the foot cover gently adapts to the foot, so there is no floor slip due to the thermal sheet. In addition, since the action of the carbon fine particles does not disappear in a short time, the thermal sheet can maintain the action for a long time or a long time. Therefore, the foot cover does not need to be replaced every time the thermal sheet is used, and is not troublesome. Further, since the thermal sheet is covered with the inner casing and the outer casing, the thermal sheet is rubbed against the foot and the floor surface and is not damaged, and can be used for a long period of time.

In addition, when the rising portion is separated into a left front piece and a right front piece on the front side, and has an engaging member so that the overlapping margin of the left and right front pieces can be adjusted (Claim 3 ), the rising portion is Since the length of the circumference can be adjusted by aligning the left piece and the right piece around the shin, it is possible to form a rising portion around a desired undercarriage. Further, since the rising portion can be closely attached to the periphery of the foot, the foot cover is not easily dropped from the foot.

Further, when the left piece and the right piece extend a belt from a side end of one of the left and right pieces coming outside, and an engaging member is provided on the belt and the other piece coming inside (claim) Item 4 ), the belt is very easy to hold. Moreover, since the belt has a small area, it is easy to attach and detach. Therefore, when the rising portion is formed in a cylindrical shape, it is easier and quicker to hold the belt and overlap the other piece than to have one piece. On the other hand, when the rising portion is separated into the left piece and the right piece, it is more lightly separated by holding the belt and separating the other piece than the other piece.

When the rising portion includes an engaging member that is detachably engaged with the inner surface of the front side in a state where the front side is overlapped inward (Claim 5 ), the front side of the rising portion is picked, and the engaging member By engaging, the length around the rising portion can be adjusted. Further, since the engaging member is provided inside the rising portion, the engaging member is caught by an external object and the engaging portion cannot be removed. Therefore, since the engagement between the left piece and the right piece is not released by an external object, it can be used with confidence.

When the engaging member is a hook-and-loop fastener (Claim 6 ), the length around the rising portion can be enlarged / reduced by a simple operation of attaching / detaching the male and female surfaces. Further, the length around the rising portion can be finely adjusted.

In the case where an opening that can be opened and closed for inserting the above-described thermal sheet into the storage portion is provided on the side surface of the rising portion (Claim 7 ), the opening and closing of the insertion port can be performed when the user is lying on her back. The part does not touch the floor. For this reason, the foot is less likely to cause bed slippage due to the insertion opening. Further, since the insertion port is provided on the side surface, it does not interfere with the division of the front side of the rising portion into the left piece and the right piece.

When such an insertion port is formed from the vicinity of the upper end of the rising portion to the portion corresponding to the heel (Claim 8 ), that is, when the insertion port is not in the heel region, it is pushed from the side surface of the foot cover. Even if this happens, the flexible part of the body hits the heel part, so it is difficult for floor slipping due to the insertion slot.

  Next, an embodiment of a heat retaining foot cover of the present invention will be described with reference to the drawings. FIG. 1 is a front perspective view showing an embodiment of a heat retaining foot cover according to the present invention, FIG. 2 is a front perspective view with a part of the main body cut away, FIG. 3 is an exploded perspective view of the main body, and FIG. FIG. 5 is a development plan view of the thermal sheet, FIG. 6 is a perspective view partially lacking showing a layer structure of an embodiment of the thermal sheet, and FIG. 7 is a cross-sectional view of the main part of FIG. FIG. 8 is a process diagram showing an example of a method for producing bamboo charcoal powder used for the thermal sheet, FIG. 9 is a process diagram showing the method for producing the thermal sheet of FIG. 8, FIG. 10 is a sectional view showing the layer structure of the main body, and FIG. FIG. 12 is a front perspective view showing another embodiment of the foot cover, and FIG. 12 is a front perspective view showing another embodiment of the foot cover.

Since the drawings relating to the foot cover A, the main body B, and the thermal sheet C are a pair of left and right, one of them is omitted. Further, in the inner covering shown in FIG. 4, the basic structure is the same except that the outer covering is provided with an insertion opening, and the illustration in FIG. 4 is omitted.
A heat retaining foot cover A shown in FIG. 1 includes a main body B and a thermal sheet C accommodated in the main body B. The main body B and the thermal sheet C will be described in detail below.
The main body B is made of a fleece which is a thick, flexible polyester fiber woven fabric having a heat retaining property and a slight cushioning property. Moreover, as shown in FIGS. 1 and 2, a boot portion 1 and a rising portion 2 are formed in series, and have a boot shape. The front side of the rising part 2 is divided into a left piece 3 and a right piece 4 up to the boots 1 so that it can be opened widely. A U-shaped engaging portion 5 is formed on the side edge of the left piece, and an engaged portion 6 that is engaged with the engaging portion is formed on the side edge of the right piece 4, and further on the rear side thereof. An auxiliary engaged portion 7 is formed. Further, the main body B shown in FIG. 2 has a double structure because it is formed by sewing around the inner covering body 8a and the outer covering body 8b shown in FIG. Further, a gap between the inner cover and the outer cover is formed as a storage portion 9.
The main body B can use sheepskin instead of fleece. In addition, when the cushioning property is not so necessary, a woven fabric such as nylon, cotton, hemp or the like can be used.

  Since the inner covering body 8a and the outer covering body 8b described above have substantially the same shape and substantially the same structure as shown in FIG. 3, only the inner covering body 8a will be described in detail. As shown in FIG. 4, the inner body 8a has a series of surfaces from the rear side of the rising portion 2 of the main body B to the bottom surface of the short boot portion 1, the back surface thereof, and the back part of the front surface thereof as shown in FIG. 20a. Therefore, the buttocks are seamless and have a flat surface. Further, the entire left side of the short boot part 1 and the rising part 2 of the main body B is formed by a single left side base 21a. Similarly, the entire right side is formed by a single right side base 22a. From the front side edge of the rising portion of the left side base 21a, an upper belt piece 23a constituting the U-shaped engaging portion and a lower belt piece 24a extend below the upper belt piece 23a.

The left side base 21a and the right side base 22a shown in FIG. 4 are stitched through the base 20a to form the inner body 8a shown in FIG. The stitched portion S1 and the edge are directed outward. Also, the outer cover 8b shown in FIG. 3 is substantially the same shape as the corresponding part of the inner cover 8a and is somewhat larger. Further, the stitched portion S2 of the outer cover body 8b faces inward. The inner cover body 8a and the outer cover body 8b have upper edges, upper edges of the upper belt pieces 23a and 23b and lower belt pieces 24a and 24b, and a side edge 25a of the left piece between the upper and lower belt pieces. 25b, and the stitched portion is directed inward to form a double-structured body as shown in FIG. 2, and the upper belt 10 and the lower belt 11 from the upper and lower portions of the side edge of the left piece 3 are formed. Is extended. Since all the above-described stitched portions are housed in the storage portion 9, the inner surface of the main body B (the inner surface of the inner cover 8a) has no stitched portions and no edges. Moreover, since it does not exist on the outer surface of the main body B (the outer surface of the jacket body 8b), the whole is in the form of a single thick woven fabric.
In addition, as shown in FIG. 3, the left side base 21b of the outer cover 8b may be provided with a slide fastener 27 by making a cut in the left side base in order to form a slit-like insertion port 26. The ground 21b may be composed of two pieces of strips, and a portion other than the insertion port 26 may be sewn and a slide fastener may be provided at the insertion port. The insertion port 26 may be provided with a hook-and-loop fastener instead of the slide fastener. The two-dot chain line of the left side base 21a shown in FIG. 4 shows the stitching position of the two strips on the left side base 21b of the jacket body of FIG.

  As shown in FIG. 2, the U-shaped engaging portion 5 of the main body B includes the upper belt 10, the lower belt 11, the side edge 12 of the left piece 3 between them, and three pieces provided on the back side of each of them. Are formed by female surfaces 14a, 14b and 14c of the surface fastener. There may be only one belt or three belts. The region where the female surface 14a of the upper belt 10 is provided extends from the front portion of the upper belt 10 to the inside of the side edge of the left piece, and extends to the extension line of the left edge of the female surface 14c of the side edge 12. ing. The female surface 14b of the lower belt 11 also extends from the front portion of the lower belt 11 to the inside of the side edge of the left piece 3, and extends to an extension line of the left edge of the female surface 14c of the side edge. The three female surfaces are close to each other. That is, the female surface 14 a of the upper belt 10 and the female surface 14 b of the lower belt 11 are stretched across the left and right sides of the left piece 3 that is the base of the upper belt 10 and the lower belt 11. The lower belt 11 has a base reinforced and the whole has a tension. Moreover, since the side edge 12 also has the female surface 14c stretched, it is reinforced and has tension. The upper belt 10 and the lower belt 11 are supported so as not to bend. Therefore, the upper belt 10 and the lower belt 11 are prevented from being bent or drooped, and are supported so as to extend straight from the side edge in the horizontal direction. It is also inverted to prevent the female surface from coming out.

Further, the surfaces of the upper belt 10 and the lower belt 11 are made of the same material as the left pieces 3a and 3b and are coupled to the left pieces 3a and 3b. That is, since the left pieces 3a and 3b are not stitched, the flexibility around the base portions of the upper belt 10 and the lower belt 11 is maintained. Further, the left piece 3, the upper belt 10 and the lower belt 11 have appropriate tension properties by the reinforcing action of the female surfaces 14a and 14b. Therefore, the upper belt 10 and the lower belt 11 including the base portion as a whole have appropriate flexibility and tension, so that the upper belt 10 and the lower belt 11 are very easy to bend, and can be attached to and detached from the engaged portion of the right piece or the auxiliary engaged portion. Easy to adjust.
The belts 11 and 12 have a length of 8 to 12 cm and a height (width) of 3 to 5 cm. The belts 11 and 12 are easy to grasp and easy to engage for all persons including those requiring care. It is preferable because of its size. In particular, those having a length of 10 cm and a height (width) of about 4 cm are preferable for exhibiting a lustrous appearance and simultaneously achieving the above-described effects. The three female surfaces may be a single U-shaped one.

  As shown in FIG. 2, the engaged portion 6 of the right piece 4 with respect to the engaging portion of the left piece 3 has the above-mentioned U-shape when the side edge of the left piece 3 is overlapped with the side edge of the right piece 4. The male surfaces 15a, 15b, and 15c corresponding to the three female surfaces 14a, 14b, and 14c are arranged in a U-shape at the position where the engaging portion 5 contacts, and is sewn to the right piece 4. . The auxiliary engaged portion 7 adjacent to the rear of the engaged portion 6 has three auxiliary male surfaces 16a, 16b, 16c arranged in a U shape in the same direction as the engaged portion 6, and The right piece 4 is sewn. The three male surfaces of the auxiliary engaged portion 7 are smaller than the male surface of the engaged portion, and are male surfaces intended to assist the engaged portion 6. To clarify. Since the right piece 4 in which the engaged portion 6 and the auxiliary engaging portion 7 are stitched as described above has flexibility and tension, the right piece 4 can be wound around the heel.

As shown in FIG. 2, the U-shaped engaging portion is a surface in which the entire vertical region of the side edge of the left piece 3 can be engaged by the female surface 14c and the left side portions of the female surfaces 14a and 14b. Is formed. The side edge 17 of the right piece 4 is also formed on a surface that can be engaged by the male surface 15c of the engaged portion 6 and the left side portions of the male surfaces 15a and 15b. Therefore, the front side of each rising portion 2 of the left piece 3 and the right piece 4 can be completely sealed by engaging the side edges 12 and 17 of the left and right pieces.
Since the male and female surfaces of the engaging portion 5, the engaged portion 6 and the auxiliary engaged portion 7 have a color different from the color of the main body 3, the existence of the male and female surfaces is easily understood. Moreover, since these are formed in a U-shape, the combination of corresponding male and female surfaces is easy to understand. In addition, the male and female surfaces are further clarified by changing the color for each combination. This is particularly effective when the care recipient needs to attach the male and female surfaces with his / her own hand when wearing the foot cover.

Next, as shown in FIG. 5, the thermal sheet C is disposed on the bottom portion of the main body B and the saddle seat 30 disposed on the portion from the toe to the back, and on the rear surface and the left and right side surfaces of the rising portion of the main body B. The outer peripheral sheet 31 is used. At the rising portion of the outer peripheral sheet 31, the engaging portion 5, the engaged portion 6 and the auxiliary engaged portion 7 are stitched to the left piece 3 and the right piece 4, and the storage portion 9 of the portion is closed. Therefore, it is formed in a width provided on the entire surface of the other part.
In order to partially engage the inner covering body 8a, the sheet for outer fabric 30 and the outer peripheral sheet 31 are provided with the female surface and the male surface of the surface fastener on the respective sheets and the inner covering body. Therefore, since each of the above-mentioned sheets is integrated with the inner cover, the sheet is prevented from being twisted in the storage portion. As a result, the inner surface of the main body B and the buttocks are smooth, and there is no wrinkle. Therefore, the thermal sheet has a sense of incongruity, and the flexibility of the fleece area wraps around the foot moderately, so that a comfortable feeling of use is obtained.
Since the thermal sheet C is composed of two sheets, it can be inserted relatively easily from the slit-shaped insertion port 26 shown in FIG. 2 and can be provided at a predetermined position. The two thermal sheets may be formed integrally.
In addition, the code | symbol 22 shown in FIG. 1 is the male and female surface of the hook_and_loop | surface fastener provided in the said sheet | seat 30 and inner covering body 8a, and the code | symbol 23 is the surface provided in the outer periphery sheet | seat 31 and inner covering body 8a. The male and female surfaces of the fastener.

The thermal sheet C is composed of a sheet containing fine powder of charcoal, and bamboo charcoal powder is particularly preferable as the fine powder of charcoal. Bamboo charcoal powder grows faster as a raw material bamboo and has a faster regeneration cycle, leading to more stable product supply than charcoal. Bamboo charcoal has a unique antibacterial activity and is effective in suppressing odor caused by the propagation of various bacteria. In addition, it has better adsorption power than charcoal, has a deodorizing / purifying function, and also has a function of amplifying negative ions in the air, which is useful for health promotion. Furthermore, bamboo charcoal has a reducing property that releases the adsorbed material when external energy such as sun-drying is applied, so the thermal sheet containing fine powder of bamboo charcoal can be used semi-permanently by care. can do.
In addition, as long as it has a far-infrared effect and an adsorption effect, charcoal, coconut shell charcoal, kenaf charcoal, mangrove charcoal, activated carbon and the like having a large number of micropores can be used for the thermal sheet.

Next, the above-described thermal sheet C (hereinafter referred to as the charcoal-containing sheet 100) will be described with reference to FIGS. However, the state of the charcoal-containing sheet here before processing into the sheet of FIG. 5 will be described.
The charcoal-containing sheet 100 includes a base material 111, bamboo charcoal powder 112 spread on the base material 111, and a cover layer 113 covering the base material 111. As a whole, the charcoal-containing sheet 100 has a cover layer 113 thermally bonded onto the base material 111 with the bamboo charcoal powder 112 sandwiched by calendaring or the like. The both side portions 114 are flatly pressed by pressure heating. The charcoal-containing sheet 100 is substantially free of adhesive.

As said base material 111, basic weight 10-100 g / m < ² >, More preferably, 20-50 g / m < ² > nonwoven fabric is used. The fibers constituting the nonwoven fabric are fibers of thermoplastic resins such as polyethylene (PE), polypropylene (PP), and polyester, and fibers having a weight per length of about 1 to 6 dtex are used.

The base material 111 is manufactured from the above thermoplastic resin by a normal manufacturing method such as the above-described entanglement or papermaking, and is further pressed or heated and pressed. In particular, short fibers or fiber powders of thermoplastic resin are blown onto a belt conveyor and entangled with each other and formed into a thickness of about 0.5 to 2 mm by calendering using 2 to 4 hot rolls. preferable. However, it may be a dry nonwoven fabric in which thermoplastic resin is ejected from the nozzle while being entangled with the surface of the plate-like member, or a wet nonwoven fabric that is entangled in a medium such as water and dried. Thereby, a tough nonwoven fabric having relatively high strength can be obtained. And since the basic weight is about 10-100 g / m < ² >, it is fully flexible.

  As the bamboo charcoal powder 112, bamboo charcoal is manufactured, pulverized with a pulverizer or fine pulverizer, and further sieved to have an average diameter of about 0.1 to 1 mm and an average length of about 0.1 to 10 mm. . That is, when the average diameter is greater than 1 mm, or when the average length exceeds 10 mm, the bamboo charcoal powder 112 is unlikely to adhere to the base material 111 or the cover layer 113. Therefore, the total amount of adhesion tends to be reduced. On the contrary, when the average diameter or average length is smaller than 0.1 mm, it adheres sufficiently to the surface of the substrate 111 or the like, but it adheres thinly, and the amount of adhesion of the bamboo charcoal powder 112 tends to decrease as a whole. is there.

  In addition, when the particles of bamboo charcoal powder are viewed in detail, some of the bamboo fibers remain elongated. Such an elongated powder may be further finely pulverized, but the elongated one is more likely to get entangled with the fibers of the nonwoven fabric, and can be prevented from falling off through the nonwoven fabric. Therefore, it is preferable to use these elongated bamboo charcoal particles as they are without removing them or crushing them finely. As described above, the average diameter is 0.1 to 1 mm, the average length is 0.1 to 10 mm, and the range of the diameter and length is changed for the above reason. In addition, you may make it select only the elongate particle | grains whose average length of a bamboo charcoal particle is about 2 to 10 times the average diameter, or about 3 to 10 times.

  In order to select the bamboo charcoal powder described above, it is possible to select a powder that passes through a coarse sieve and does not pass through a fine sieve. In that case, for example, a method of combining a slit-like sieve through which bamboo short fibers having a diameter of 1 mm or more and a sieve through which bamboo charcoal particles having a particle diameter of less than 0.1 mm are passed is used. In the case of selecting only elongate ones, for example, a sieve through which bamboo charcoal powder having a length of less than 0.2 mm or less than 0.3 mm passes is used. However, strictly speaking, it is difficult to make only a predetermined range even if it is selected with a sieve, but it becomes easy to entangle the fibers of the nonwoven fabric by selecting to some extent.

  As the raw bamboo as a material of bamboo charcoal, those having a large number of fine holes such as Soso bamboo, true bamboo, and light bamboo are preferable, and bamboo having a growth age of 3 to 5 years is particularly preferable. Such raw bamboo 115 is dried and steamed and burned at 500 to 750 ° C. or higher in a charcoal baking furnace 116 as shown in FIG. 8 (first step S1). At that time, the firing furnace 116 is provided with an adjustment valve 117 at the air intake. Then, the waste bamboo 118 placed in the lower part of the firing furnace 116 is ignited by the gas burner 119, the buffer material made of the paving stone 120 or the like is warmed, and the raw bamboo 115 loaded in the buffer material is steamed and carbonized. To go.

  In addition, when baking with the baking furnace 116, in the range of about 0-100 degreeC, temperature will rise gently. Next, at about 100 to 350 ° C., the temperature rises more steeply than the range of 0 to 100 ° C. And at 350-500 degreeC, a temperature rise becomes a gentle sudden again. And in the range of 500-750 degreeC or more, a temperature rise becomes quicker than the range of 350-500 degreeC. The reason why the temperature changes step by step is considered to be due to the following steps. That is, at the initial stage of 0 to 100 ° C., the temperature until the bamboo in the firing furnace 116 is ignited by the residual heat of the paving stone 120 is considered. The next 100 to 350 ° C. is considered to be a temperature at which water evaporates from the bamboo in the baking furnace 116 and the bamboo vinegar is extracted. At the next stage of 350 to 500 ° C., it is considered a temperature at which the organic matter in the baking furnace is decomposed. A temperature of 500 to 750 ° C. or higher is considered to be a temperature at which the organic matter of the bamboo is completely lost and the effect of the bamboo charcoal is obtained by carbonization. Therefore, the final temperature of charcoal baking is preferably at least 750 ° C. or higher.

  When the carbonization treatment is completed, impurities produced in the carbonization treatment step such as ash are removed by brushing the obtained bamboo charcoal and washing it (second step S2). Then, as described above, pulverization is performed with a fine pulverizer or the like (third step S3), and then a predetermined average particle diameter or a predetermined average diameter and average length is selected (fourth step S4).

  Inside the firing furnace 116, carbon monoxide is generated in the process of carbonization of the raw bamboo 115, and the carbon monoxide is further burned and changed to carbon dioxide. Therefore, it is necessary to supply air sufficiently. However, in the final step, the regulating valve 117 is adjusted to maintain the oxygen concentration at a low state, thereby preventing bamboo charcoal from becoming ash.

  By baking at a high temperature as described above, tar, bamboo vinegar, and the like are separated, and bamboo charcoal with high carbon purity is obtained. In this case, the electric resistance of the surface of bamboo charcoal is preferably 50 Ω / cm or less, particularly preferably 10 Ω / cm or less. When the electrical resistance is higher than that, the purity is low and there are many impurities such as tar, so that the fine pores of the bamboo charcoal powder 112 are clogged and the adsorption action is lowered. The electrical resistance of bamboo charcoal is measured by placing two electrode bars 119 of the tester on the surface of bamboo charcoal at intervals of several centimeters. By the way, it does not energize with raw bamboo 115.

As the covering layer 113, the same non-woven fabric as the base material 111 is used. A non-woven fabric having a similar basis weight or somewhat light weight, for example, a non-woven fabric having a basis weight of 10 to 100 g / m ² , more preferably 10 to 50 g / m ² is used. Moreover, it is preferable to use it in the state which raised softly without pressing strongly. The manufacturing method of the non-woven fabric of the covering layer 113 is the same as the manufacturing method of the base material, for example, tangled while blowing short fibers or fiber powders of thermoplastic resin onto the belt conveyor, and 2 to 4 hot rolls. For example, a method of forming a thickness of about 0.5 to 2 mm by calendering using a material is employed. However, a normal dry nonwoven fabric or a wet nonwoven fabric may be used. The fibers constituting the nonwoven fabric are fibers of thermoplastic resin such as polyethylene (PE), polypropylene (PP), and polyester, and fibers of 1 to 6 dtex are used.

  The base material 111, the bamboo charcoal powder 112, and the cover layer 113 are processed into the charcoal-containing sheet 100 in the process shown in FIG. 9, for example. First, thermoplastic resin fiber powder or short fibers 123 are sprayed onto the belt conveyor 124 from the first nozzle 122 and heated by the heater 125 to form a fiber layer 126 having a predetermined thickness (11th step S11). At that time, a non-woven fabric (base material) may be formed by applying pressure with the heat roller 127. Next, a predetermined amount of bamboo charcoal powder 112 is sprayed or sprayed from the second nozzle 128 while moving the fiber layer 125 or the nonwoven fabric in the longitudinal direction by the belt conveyor 123 (12th step S12). The belt conveyor 124 is preferably made of a metal, particularly a fine mesh-like one so that the heat of the heater 125 can be easily passed.

Next, powder or short fibers of thermoplastic resin fibers for forming the covering layer 113 are sprayed from the third nozzle 29 thereon to form the second fiber layer 130 (13th step S13). Further, they are pressed by the heat roller 131 and subjected to calendering to form a predetermined thickness (14th step S14). As a result, the fibers of the base material 111 and the fibers of the covering layer 113 are intertwined and fused at the intersection, so that the bamboo charcoal powder 112 is confined so as not to easily fall off. Thereby, the charcoal-containing sheet 100 that does not impair the texture is obtained. As shown in FIG. 6, the obtained charcoal-containing sheet 100 has, for example, a width that allows the charcoal-containing sheet to be used without leaving a surplus to form two thermal sheets. preferable. However, it may be a long sheet.
In the case of a roll shape, after calendering, both side edges are further strongly pressed with a superheated roller to form both side portions (reference numeral 114 in FIG. 6) that are pressure-bonded within a range of 1 to 15 mm in width, particularly 5 to 10 mm. Is preferred. In the case of a long sheet, it is preferable to cut a roll-shaped sheet and press-bond the cut end face. That is, four sides are formed by pressure bonding. In addition, about the manufacturing method of a charcoal containing sheet | seat, it is not restricted to this.

  Since the charcoal-containing sheet 100 does not use an adhesive, it has a high harmful gas adsorption effect due to bamboo charcoal powder, and hardly generates volatile components as in the case of using an adhesive or a binder. Moreover, since the adhesive is not used, it can be used repeatedly by washing the deposits with water after using for a certain period of time. The production of the charcoal-containing sheet is not limited to the above. Such charcoal-containing sheets can increase the antibacterial or sterilizing effect by spraying distilled bamboo vinegar or the like.

  The thermal sheet C stored in the storage unit 9 in the main body B is formed by cutting the above-mentioned charcoal-containing sheet as shown in FIG. 6, but the peripheral part thereof does not use an adhesive and is heated by a heating roller or the like. Crimp. Thereby, bamboo charcoal powder does not fall off from the peripheral part, which is preferable. Note that the entire surface can be crimped. Further, since no adhesive is used, there is an effect such as the generation of the volatile components as described above, which is preferable. However, the peripheral part may not be crimped. When not crimped, bamboo charcoal powder tends to fall off from the periphery, but bamboo charcoal powder is sufficiently entangled in the fibers of the base material and covering layer to prevent bamboo charcoal powder from passing through the nonwoven fabric and falling off the sheet surface. Yes. What the peripheral part is not pressure-bonded becomes a charcoal-containing sheet having a texture as a whole.

  Obviously, this thermal sheet is made of fiber, very thin, flexible, and lightweight, so it is easy to be integrated with the flexible main body. In addition, a gentle curved surface can be formed together with the main body. Therefore, the curved surface of the foot can be gently covered and the foot is not compressed. In addition, since it corresponds to the angle of the foot when walking, there is no sense of incongruity and it is very lightweight, so it can be worn without placing a burden on the foot. In addition, if you are bedridden, your feet are gently wrapped, so there is no weight on your feet. In addition, since the thermal sheet is very light, it is possible to increase the number of sheets stored in the storage unit and further enhance the heat retaining effect. Thus, the flexibility of the foot cover is maintained even if the thermal sheet has a plurality of layers. On the other hand, since the tenacity is further increased, the rising portion tends to be in a standing state. Since the foot cover itself has a two-layer structure and forms a gap, an air layer formed by the gap has heat retaining properties. Therefore, it can also be used without providing a thermal sheet. In this way, the foot cover can adjust the heat retaining action according to the physical condition and the temperature of the season.

  Moreover, since a thermal sheet can be removed from a storage part, only the main body B of a foot cover can be washed. Therefore, the thermal sheet C is not damaged by washing the main body B. In addition, when the charcoal particles are exposed to sunlight, the effects of the charcoal fine particles are restored. Therefore, if the thermal sheet B is detachably attached to the main body B, the thermal sheet B can be removed from the main body B from time to time and exposed to sunlight to quickly recover the action effect of the carbon fine particles.

As apparent from the above description, the heat-insulating foot cover A of the present invention shown in FIG. 1 has a three-layer structure including an inner cover 8a, a thermal sheet B, and an outer cover 8b as shown in FIG. However, it feels as smooth as a flexible piece of fabric. Therefore, the above-mentioned foot cover A can cope with a complicated curve of the foot shape, so there is no wobbling. Further, since the buttocks have no stitched portion, even if a bedridden person wears this foot cover, it is difficult for floor slippage to occur. Since there is no seam on the bottom and toe, it is easy to walk. In addition, when the thermal sheet is formed in two layers and provided in the storage portion of the main body B, the overall flexibility is maintained, and even in the case of such a layer structure, it is possible to obtain a feeling that is not substantially changed. In addition, the heat retaining effect is even more effective.
In the case where the thermal sheet C has three or more layers and the inner cover 8a and the outer cover 8b each have a two-layer structure, the structure of the layer structure is not limited as long as the above-described effects are obtained.

Next, the usage method and usage state of the foot cover A will be described with reference to FIGS. 1 and 2.
When the foot cover A is mounted, the left piece 3 and the right piece 4 can be opened to the left and right as shown in FIG. Easy to insert. After being inserted into the boots 1, the right piece 4 is tilted inward along the heel, and the engaged portion 6 and the auxiliary engaged portion 7 are provided around the heel. At this time, since the right piece 4 has a tension property, it can be provided on the ridge in a standing state only by lightly assisting with a hand. On the other hand, since the upper belt 10 and the lower belt 11 of the engaging portion 5 of the left piece 3 also have the tension as described above, it is easy to connect the engaged portion 6 or the auxiliary engaged portion 7 of the right piece. Can be adhered to. Further, the upper belt 10 and the lower belt 11 can be bonded stepwise to the male surfaces 15a and 15b of the engaged portion 6 or the male surfaces 16a and 16b of the auxiliary engaged portion 7 in order. Therefore, it can engage, confirming the position to adhere | attach finely. Thus, the engagement work performed with the belt can be performed lightly with a light burden on the hand. Further, it is possible to correct only the lower belt 11 while maintaining the engagement position of the upper belt. Since the upper belt 10 and the lower belt 11 are a part of the engaging portion, fine adjustment with the engaged portion is easy. Further, since the belt is flexible, it can be finely adjusted by bending the belt. Since the right piece is provided with two types of 6 engaged portions and auxiliary engaged portions 7, the adhesive surface with the engaging portion 5 is formed in a wide area. Therefore, when the rising portion is formed in a cylindrical shape, it is possible to make fine adjustments such as bringing the rising portion into close contact with the ridge or providing a margin. For example, when the short shoe portion is formed larger than the size of the foot, the foot cover is prevented from falling off the foot if the rising portion is brought into close contact with the heel.

Further, the U-shaped engaging portion 5 and the U-shaped engaged portion 6 are completely closed at the front side of the rising portion 2 by engaging the respective side edges of the left piece 3 and the right piece 4. Therefore, in the foot cover, the short boot part 1 and the rising part 2 are continuously formed without a gap. Accordingly, the foot cover A prevents cold air from flowing in between and providing a cool feeling. Even when the engaging portion 5 is engaged with the auxiliary engaged portion 7, the front side of the rising portion can be closed.
Further, since the engaged portion 6 and the auxiliary engaged portion 7 are close to each other in the right piece 4, the right piece 4 is provided with a male surface in a relatively wide area. Therefore, since the engaging part 5 can use both the engaged part 6 and the auxiliary engaged part 7 at the same time, the engaging position of the engaging part is the best depending on the situation of the user's foot. You can decide where.

Usually, in the thick fabric, the thickness of the stitched portion, that is, the joint portion is doubled, and a step is formed in the joint portion. Therefore, when the foot rides on the joint for a long time, such as at bedtime, the blood vessels in that portion of the foot are subjected to pressure, resulting in poor blood flow. Further, when the seam hits the buttocks and toes of the foot cover, there is a sense of incongruity. However, since this leg cover has no seam in the buttocks and toes, the blood flow in the buttocks is not easily obstructed when bedridden. Also, the heel and toe portions are flat and flexible, and there is no step, so there is no sense of incongruity.
As described above, the left piece 3 and the right piece 4 of the rising portion have elasticity, so that the male and female surfaces of the hook-and-loop fastener provided in the engaging portion 5 and the engaged portion 6 with the left and right pieces being overlapped. By engaging, the front side of the rising portion 2 is further increased in tension. Therefore, since the rising portion 2 is likely to be in a standing state, it is difficult to hang down without being fastened to a shin. In addition, since the blood circulation of the foot is not hindered, the entire foot including the heel can enjoy a reliable heat insulation by the thermal sheet.

  A slide fastener is provided at the insertion slot on the side of this foot cover, but this is provided above the corresponding part of the ankle so that when you lie down sideways, the side of your foot Even when touching the surface, the heel is pushed by the slide fastener and does not deteriorate blood flow.

As another embodiment of the boot-shaped foot cover, as shown in FIG. 11, the front surface of the rising portion 60 of the boot-shaped main body C is folded inward, and the folded inner surfaces are engaged with each other. In the longitudinal direction on both sides of the inner surface of the bent portion, the male and female surfaces 61a and 61b of the band-shaped surface fastener are arranged close to each other. The length around the rising portion indicated by the two-dot chain line is reduced by engaging the male and female surfaces 61a and 61b. The rising portion can be returned to its original shape by releasing the engagement of the male and female surfaces. By disposing the male and female surfaces further in the left-right direction, the length around the rising portion when the male and female surfaces are engaged is further increased from that of the original shape.
Further, as shown in FIG. 12, the front surface of the rising portion 70 of the main body C is cut open to the boot portion to form a right piece 71 and a left piece 72, and male and female surfaces 73a and 73b of hook-and-loop fasteners are provided on the back side. Also good. In this case, the left piece 71 and the right piece 72 are brought into contact with the inner surfaces of the respective side edges so that the male and female surfaces can be easily engaged with each other and can be formed into a cylindrical shape having a desired surrounding length.
In the embodiment of FIG. 11 and FIG. 12, the male and female surface engaging portions of the hook-and-loop fastener are formed in the longitudinal direction on the front side of the rising portion, so that the front side of the rising portion of the flexible main body has the function of the reinforcing rib in the vertical direction. It will be. Therefore, the flexible foot cover does not sag.
Each heat-retaining foot cover has the same basic structure as the heat-retaining foot cover A shown in FIG. 1, and a main body C is formed by an inner cover and an outer cover, and a heat sheet is also provided in the storage portion. Is provided. Further, the material, the material, and the basic manufacturing method relating to the warming foot cover are the same as those of the warming foot cover A in FIG.

FIG. 1 is a front perspective view showing an embodiment of a heat retaining foot cover A of the present invention. FIG. 2 is a front perspective view in which the main body is partially cut away. FIG. 3 is an exploded perspective view of the main body. FIG. 4 is a development view of the inner casing and the outer casing. FIG. 5 is a developed plan view of the thermal sheet. FIG. 6 is a partial perspective view showing the layer structure of one embodiment of the thermal sheet. FIG. 7 is a cross-sectional view of the main part of FIG. FIG. 8 is a process diagram showing an example of a method for producing bamboo charcoal powder used in the thermal sheet. FIG. 9 is a process diagram showing a method for manufacturing the thermal sheet of FIG. FIG. 10 is an enlarged cross-sectional view showing the layer structure of the main body. FIG. 11 is a front perspective view showing another embodiment of the foot cover. FIG. 12 is a front perspective view showing another embodiment of the foot cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shoe part 2 Standing part 3 Left piece 4 Right piece 5 Engagement piece 6 Engagement part 7 Auxiliary engagement part 8a Inner cover 8b Outer cover 9 Storage part 10 Upper belt 11 Lower belt 12 Side edge part 14a Female surface 14b Female surface 14c Female surface 15a Male surface 15b Male surface 15c Male surface 16a Male surface 16b Male surface 16c Male surface 20a Anchor 21a Left side 21b Left side 22a Right side 23a Upper belt piece 23b Upper belt piece 24a Below Belt piece 24b Lower belt piece 25a Side edge portion 25b Side edge portion 30 Base sheet 31 Outer peripheral sheet 60 Rising portion 61a Female surface 61b Male surface 70 Rising portion 71 Left piece 72 Right piece 73a Female surface 73b Male surface A Foot Cover B Main body C Thermal sheet S1 Stitching part S2 Stitching part 100 Charcoal-containing sheet 111 Base material 112 Bamboo charcoal powder 113 Cover layer 114 Both sides 115 Raw bamboo 116 Baking furnace 117 Regulating valve 11 8 Waste bamboo 119 Gas burner 120 Paving stone

Claims (8)

A foot cover for heat insulation formed by three-dimensional sewing into a boot shape having a boots portion into which a thick flexible fabric is inserted and a rising portion that rises in a cylindrical shape from the upper end of the boot shoe portion ,
A saddle where a series of surfaces from the back part to the back part through the bottom part so that the buttock and toe part are seamless ,
A warming foot cover comprising a left side and a right side that are sewn to the left and right edges of the saddle and form a left side and a right side of the boot and the rising part, respectively .   The fabric is formed in a double manner by an inner cover and an outer cover, and a fiber thermal sheet carrying carbon fine particles supported in a storage portion formed by a gap between the inner cover and the outer cover is detachably stored. The heat-insulating foot cover according to claim 1. The warming foot cover according to claim 1 or 2 , wherein the rising portion is separated into a left front piece and a right front piece on the front side, and an engagement member is provided so as to adjust an overlap margin of the left and right front pieces. The heat-insulating foot cover according to claim 3 , wherein a belt is extended from a side end of a front piece on the outside of the left and right front pieces, and the engagement member is provided on the front piece on the inside of the belt. The heat retaining foot cover according to claim 1 or 2, further comprising an engaging member that detachably engages the inner surfaces on the front side of the rising portion. The heat retaining foot cover according to claim 3, 4 or 5, wherein the engaging member is a hook-and-loop fastener. Before SL left side or right side of the rising portion, the temperature-maintaining foot cover according to claim 2, wherein is provided an openable and closable insertion opening for inserting a thermal sheet in the storage unit. The heat-insulating foot cover according to claim 7, wherein the insertion opening is formed from the vicinity of the upper end of the rising portion to the portion corresponding to the heel.