Patent Publication Number: US-2017354531-A1

Title: Waist belt

Description:
FIELD 
     The present disclosure relates to a waist belt that squeezes tight around a waist portion of a user by being worn on a wide part of the waist portion. 
     BACKGROUND 
     A waist belt that squeezes tight around a waist portion of a user by being worn on a wide part of the waist portion has a main belt inevitably having a wide width. The waist belt therefore needs to be creatively designed so as to make full surface contact with the waist portion. For example, a waist belt (a belt device to wear on a waist portion) disclosed in Patent Literature 1 includes a structure having segmental belts extended in two, upper and lower stages leftward and rightward from a waist-portion covering part worn on a wide part of the waist portion. Each of the segmental belts is made of a stretchable material, so that the segmental belts wound around in two, upper and lower stages can bring the waist-portion covering part into full surface contact with a wide part of a waist portion of a user and squeeze tight around the waist portion. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Japanese Patent Application Laid-open No. 2002-095686 
     SUMMARY 
     Technical Problem 
     As described above, a waist belt that squeezes tight around a waist portion of a user by being worn on a wide part of the waist portion inevitably has a wide width. Unless differences in circumferential length that occur between upper and lower parts of the waist portion are appropriately handled, the waist belt is kept from entirely making uniform surface contact with the waist portion and therefore cannot fully perform the function of squeezing tight around and fixing the waist portion. Particularly if the user is a female, the differences in circumferential length are not negligible. For example, a wider waist belt is more likely to have a problem of having the waist belt apart from a constricted part of the waist portion or having the waist belt squeezing excessively tight around a part of the waist portion other than the constricted part. 
     The waist belt disclosed in Parent Literature 1 is intended to absorb the above-described differences in circumferential length by having the segmental belts in the two, upper and lower stages wound round an abdominal part and a lower abdominal part, respectively. However, the segmental belts in two, upper and lower stages are joined to the waist-portion covering part, and the individual segmental belts are therefore not expected to achieve full surface contact with the waist portion. Each of the segmental belts is made of a stretchy material. In addition, manners in which the individual segmental belts are stretched are independent from one another. Thus, it cannot be said with certainty that the segmental belts in two, upper and lower stages fully function to squeeze tight around and fix a waist portion because the segmental belts become loose and tight in response to moves of a user thereof even when having been set so as to adequately squeeze at the beginning of being worn. 
     It is considered that the idea of separating a squeezing device into multiple stages in a waist belt having a wide width serves as a useful reference. Regarding the structure of the waist belt disclosed in Patent Literature 1, however, room of examination still remains in terms of actual conditions of the waist belt at the time of being worn. The present disclosure is aimed at providing a waist belt that squeezes tight around a waist portion of a user by being worn on a wide part of the waist portion, the waist belt being operable to absorb differences in circumferential length in the waist portion, keep the function of squeezing tight around the waist portion unaffected even when the user moves, and keep a main belt making wide surface contact with the waist portion. 
     Solution to Problem 
     A waist belt includes: a nonstretchable left main belt; a nonstretchable right main belt; a nonstretchable left inner tightening belt; a nonstretchable left outer tightening belt; a nonstretchable right inner tightening belt; a nonstretchable right outer tightening belt; a stretchable left subsidiary tightening belt; and a stretchable right subsidiary tightening belt. The left main belt includes a right folding-back ring in the lower half of the right end thereof. The right main belt includes a left folding-back ring in the lower half of the left end thereof. The left inner tightening belt has the right end thereof connected to the lower half of the right end of the left main belt, is passed through the left folding-back ring and folded back leftward, and includes a left linking ring at the left end thereof. The right inner tightening belt has the left end thereof connected to the lower half of the left end of the right main belt, is passed through the right folding-back ring and folded back rightward, and has a right linking ring at the right end thereof. The left subsidiary tightening belt includes an insertion ring through which the right subsidiary tightening belt is passed, has the right end thereof joined to the upper half of the left end of the right main belt, and is extended leftward. The right subsidiary tightening belt has the left end thereof joined to the upper half of the right end of the left main belt, and is passed through the insertion ring and extended rightward. The left outer tightening belt has the right end thereof connected to the left end of the left subsidiary tightening belt, is passed through a left fixation ring and folded back rightward, is passed through the left linking ring and folded back leftward, and has the left end thereof connected to the left main belt, the left fixation ring being attachable to and detachable from the outer surface of the left main belt. The right outer tightening belt has the left end thereof connected to the right end of the right subsidiary tightening belt, is passed through a right fixation ring and folded back leftward, is passed through the right linking ring and folded back rightward, and has the right end thereof connected to the right main belt, the right fixation ring being attachable to and detachable from the outer surface of the right main belt. Each of the left folding-back and all the other “rings” in the present disclosure is an annular member made of resin or metal and is preferably fully closed but may have a gap that is small enough to keep the corresponding belt from slipping out (the same applies to the following description). 
     The waist belt of the present disclosure includes a set of a left inner tightening belt and a left outer tightening belt and a set of a right inner tightening belt and a right outer tightening belt. In the waist belt of the present disclosure, the lower halves of the left main belt and the right main belt are strongly tightened by use of the set of the left inner tightening belt and the left outer tightening belt and the set of the right inner tightening belt and the right outer tightening belt. Specifically, the left outer tightening belt pulls the left linking ring with the total of loads acting on the left fixation ring and the right end of the left outer tightening belt that is connected to the left main belt. With the total of respective loads acting on the left linking ring and the right end of the left inner tightening belt that is connected to the right end of the left main belt, the left inner tightening belt pulls the left folding-back ring provided at the left end of the right main belt. Likewise, the right outer tightening belt pulls the right linking ring with the total of loads acting on the right fixation ring and the left end of the right outer tightening belt that is connected to the right main belt. With the total of respective loads acting on the right linking ring and the left end of the right inner tightening belt that is connected to the left end of the right main belt, the right inner tightening belt pulls the right folding-back ring provided at the right end of the left main belt. The left fixation ring and the right fixation ring are configured so as to be able to pull a left outer tightening belt and a left subsidiary tightening belt and to pull a right outer tightening belt and a right subsidiary tightening belt, respectively, at the same time. 
     The waist belt of the present disclosure may be configured as: a waist belt including: a nonstretchable left main belt; a nonstretchable right main belt; a nonstretchable left tightening belt; a nonstretchable right tightening belt; a stretchable left subsidiary tightening belt; and a stretchable right subsidiary tightening belt. The left main belt includes a right folding-back ring in the lower half of the right end thereof. The right main belt includes a left folding-back ring in the lower half of the left end thereof. The left subsidiary tightening belt includes an insertion ring through which the right subsidiary tightening belt is passed, has the right end thereof joined to the upper half of the left end of the right main belt, and is extended leftward. The right subsidiary tightening belt has the left end thereof joined to the upper half of the right end of the left main belt, and is passed through the insertion ring and extended rightward. The left tightening belt has the right end thereof connected to the lower half of the right end of the left main belt, is passed through the left folding-back ring and folded back leftward, is passed through the left fixation ring and folded back rightward, and has the left end thereof connected to the right end of the left subsidiary tightening belt, the left fixation ring being attachable to and detachable from the outer surface of the left main belt. The right tightening belt has the left end thereof connected to the lower half of the left end of the right main belt, is passed through the right folding-back ring and folded back rightward, is passed through a right fixation ring and folded back leftward, and has the belt end thereof connected to the right end of the right subsidiary tightening belt, the right fixation ring being attachable to and detachable from the outer surface of the right main belt. 
     In the waist belt of the present disclosure simply including a left tightening belt and a right tightening belt, the lower halves of the left main belt and the right main belt are tightened only by pulling a set of the left tightening belt and a set of the right tightening belt individually. Specifically, with the total of respective loads acting on the left fixation ring and the right end of the left tightening belt that is connected to the right end of the left main belt, the left tightening belt pulls the left folding-back ring provided at the left end of the right main belt. Likewise, with the total of respective loads acting on the right fixation ring and the left end of the right tightening belt that is connected to the left end of the right main belt, the right tightening belt pulls the right folding-back ring provided at the right end of the left main belt. The left fixation ring and the right fixation ring are configured so as to be able to pull the left tightening belt and the left subsidiary tightening belt and to pull the right tightening belt and the right subsidiary tightening belt, respectively, at the same time. The waist belt simply including the left tightening belt and the right tightening belt can be configured without a left linking ring and a right linking ring. As compared with the foregoing waist belt of the present disclosure that includes a set of the left inner tightening belt and the left outer tightening belt and a set of the right inner tightening belt and the right outer tightening belt, this waist belt simply including the left tightening belt and the right tightening belt can be lightweight and does not have the left linking ring and the right linking ring pressed against the left main belt and the right main belt, respectively. 
     The terms “left”, “right”, “up”, and “down” as used in the present disclosure refer to “left”, “right”, “up”, and “down” with respect to a user wearing any one of the waist belts. “Left”, “right”, “up”, and “down” in the back-side development view of the waist belt agree with “left”, “right”, “up”, and “down” in the structure thereof. Likewise, “inner” refers to a side relatively near to the user. In other words, a side making contact with the user is expressed as being “inner”. “Outer” refers to a side relatively far from the user. In other words, a side that can be seen from the outside is expressed as being “outer”. “Left end” refers to a range including a left end. “Right end” refers to a range including a right end. “Intermediate” refers to a range including a midpoint. The terms “left end”, “right end”, and “intermediate” do not mean only the ends and the midpoint of the left main belt, the right main belt, the left tightening belt, the left inner tightening belt, the left outer tightening belt, right tightening belt, the right inner tightening belt, the right outer tightening belt, the left subsidiary tightening belt, or the right subsidiary tightening belt in a direction in which the corresponding belt extends. The terms “left half”, “right half”, “upper half”, and “lower half” refer to parts obtained by halving the left main belt, the right main belt, the left tightening belt, the left inner tightening belt, the left outer tightening belt, the right tightening belt, the right inner tightening belt, the right outer tightening belt, the left subsidiary tightening belt, or the right subsidiary tightening belt in a rightward/leftward direction or in an upward/downward direction thereof. A “left half” means the left one of parts obtained by the halving in the rightward/leftward direction. A “right half” means the right one of parts obtained by the halving in the rightward/leftward direction. An “upper half” means the upper one of parts obtained by the halving in the upward/downward direction. A “lower half” means the lower one of parts obtained by the halving in the upward/downward direction. 
     The waist belt of the present disclosure includes the following on the outer surfaces of the nonstretchable left main belt and the nonstretchable right main belt: in a lower stage, either the nonstretchable left tightening belt or a set of the nonstretchable left inner tightening belt and the nonstretchable left outer tightening belt, and either the nonstretchable right tightening belt or a set of the nonstretchable right inner tightening belt and the nonstretchable right outer tightening belt; and, in an upper stage, the stretchable left subsidiary tightening belt and the stretchable right subsidiary tightening belt. In the waist belt of the present disclosure, the right end of the left main belt and the left end of the right main belt, which are set opposed to each other, are worn on the waist portion of the user in such a manner as to face each other across the backbone of the user. In the waist belt of the present disclosure, the widths (length in the upward/downward direction) of the left main belt and the right main belt are determined so that none of the left tightening belt, the left inner tightening belt, the left outer tightening belt, the right tightening belt, the right inner tightening belt, the right outer tightening belt, the left subsidiary tightening belt, and the right subsidiary tightening belt can make direct contact with the user. The left subsidiary tightening belt, the right subsidiary tightening belt, the left folding-back ring, and the right folding-back ring are arranged between the right end of the left main belt and the left end of the right main belt, which are set opposed to each other. Consequently, each of the left main belt and the right main belt that are worn on the waist portion of the user inevitably has a wide width, the maximum of which is a width obtained by adding up the respective widths of the left subsidiary tightening belt, the left folding-back ring, and the right folding-back ring, excluding the right subsidiary tightening belt that is passed through the insertion ring of the left subsidiary tightening belt. The widths of the left main belt and the right main belt can be reduced by having the levels of the left folding-back ring and the right folding-back ring uniformed in such a manner that the left tightening belt or the left inner tightening belt is inserted through the right folding-back ring or that, to the contrary, the right tightening belt or the right inner tightening belt is inserted through the left folding-back ring. 
     Consequently, in the waist belt of the present disclosure, when the left fixation ring and the right fixation ring are fixed onto the respective outer surfaces of the left main belt and the right main belt with the left tightening belt and the right tightening belt, or the left outer tightening belt and the right outer tightening belt, being pulled, the left main belt and the right main belt make wide surface contact with the waist portion in a manner such that either the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt and either the right tightening belt or a set of the right inner tightening belt and the right outer tightening squeeze tight around the lower half of the waist portion while the left subsidiary tightening belt and the right subsidiary tightening belt squeeze tight around an upper part of the constricted waist portion. When the user moves, the left subsidiary tightening belt and the right subsidiary tightening belt elongate and contract, and the left main belt and the right main belt are kept in tight contact with the upper half of the constricted waist portion. At the same time, the elongation and contraction of the left subsidiary tightening belt and the right subsidiary tightening belt absorb the move of the user, so that either the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt and either the right tightening belt or a set of the right inner tightening belt and the right outer tightening belt are allowed to follow the move of the user while being kept tense, whereby the left main belt and the right main belt are kept making surface contact with the waist portion. 
     The structure such that the right subsidiary tightening belt is passed through the insertion ring provided to the left subsidiary tightening belt works to uniform the tension generated by the stretchable left subsidiary tightening belt and the stretchable right subsidiary tightening belt. This means that the relation therebetween may be reversed. That is, another structure may be employed such that: the insertion ring is provided to the right subsidiary tightening belt instead of the left subsidiary tightening belt; the left subsidiary tightening belt has the right end thereof joined to the upper half of the left end of the right main belt, and is passed through the insertion ring and extended leftward; and the right subsidiary tightening belt has the left end thereof joined to the upper half of the right end of the left main belt and is extended rightward. All that the waist belt of the present disclosure needs to include are: the left subsidiary tightening belt and the right subsidiary tightening belt arranged in an upper stage; and either the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt and either the right tightening belt or a set of the right inner tightening belt and the right outer tightening belt arranged in a lower stage. The waist belt is basically formed line-symmetrically in the rightward/leftward direction. Therefore, regardless of which of the left subsidiary tightening belt and the right subsidiary tightening belt the insertion ring is provided to, the function of keeping the left main belt and the right main belt making surface contact with the waist portion is not impaired. 
     Various conventionally publicly known attachment/detachment devices are each usable as a device for having the left main belt and the right main belt wound around and worn on the waist portion of the user. It is preferable that the left main belt and the right main belt be integrally wound around the waist portion of the user with one part of a hook-and-loop fastener and the other part of the hook-and-loop fastener formed so as to be attachable to and detachable from each other, the one part being provided on either or both of the inner surfaces of the left end of the left main belt and the right end of the right main belt, the other part being provided on either or both of the outer surfaces of the left main belt and the right main belt. For example, a male surface (hook surface) of a hook-and-loop fastener may be provided on the inner surface of the right end of the right main belt, and a female surface (loop surface) of the hook-and-loop fastener may be provided on the outer surface of the left end of the left main belt. In such a case, wearing of the left main belt and the right main belt that have been wound around the waist portion of the user from the back side is completed once the male surface on the inner surface of the right end of the right main belt is engaged with the female surface on the outer surface of the left main belt. 
     The left fixation ring not only serves as a pulling device that pulls the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt in the lower stage, and the left subsidiary tightening belt in the upper stage at the same time, but also serves as a restraining device that restrains either the left tightening belt or the set of the left inner tightening belt and the left outer tightening belt, and the left subsidiary tightening belt while keeping these belts pulled. Likewise, the right fixation ring not only serves as a pulling device that pulls the right tightening belt or a set of the right inner tightening belt and the right outer tightening belt in the lower stage, and the right subsidiary tightening belt in the upper stage at the same time, but also serves as a restraining device that restrains either the right tightening belt or the set of the right inner tightening belt and the right outer tightening belt, and the right subsidiary tightening belt while keeping these belts pulled. 
     Various conventionally publicly known attachment/detachment devices are each usable as a device for having the above-described left fixation ring and the above-described right fixation ring attached and fixed to the left main belt and the right main belt, respectively. It is preferable that: the left fixation ring be positionally fixed with respect to the outer surface of the left main belt with one part of a hook-and-loop fastener and the other part thereof formed so as to be attachable to and detachable from each other, the one part being provided to the left fixation ring, the other part being provided on the outer surface of the left main belt; and the right fixation ring be positionally fixed with respect to the outer surface of the right main belt with one part of a hook-and-loop fastener and the other part thereof formed so as to be attachable to and detachable from each other, the one part being provided to the right fixation ring, the other part being provided on the outer surface of the right main belt. For example, male surfaces of hook-and-loop fastener may be provided on the left tab and the right tab attached to the left fixation ring and the right fixation ring, respectively, and female surfaces of the hook-and-loop fasteners may be provided on the respective outer surfaces of the left main belt and the right main belt. In such a case, the fixation is completed once the left tab of the left fixation ring, which pulls the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt while pulling the left subsidiary tightening belt, is engaged with the female surface provided on the outer surface of the left main belt, and the right tab of the right fixation ring, which pulls the right tightening belt or a set of the right inner tightening belt and the right outer tightening belt while pulling the right subsidiary tightening belt, is engaged with the female surface provided on the outer surface of the right main belt. 
     Advantageous Effects of Disclosure 
     According a waist belt of the present disclosure, the waist belt can be worn on a wide part of a waist portion of a user by having differences in circumferential length of the waist portion absorbed, the function of squeezing tight around the waist portion can be left unaffected when the user moves, and a main belt can be kept making wide surface contact with the waist portion. These effects are obtained by pressing the nonstretchable left main belt and the nonstretchable right main belt against the waist portion of the user, the left main belt and the right main belt being to be wound around the waist portion, the pressing being achieved by the combined use of: squeezing tight with either the nonstretchable left tightening belt or a set of the nonstretchable left inner tightening belt and the nonstretchable left outer tightening belt and either the nonstretchable right tightening belt or a set of the nonstretchable right inner tightening belt and the nonstretchable right outer tightening belt; and squeezing tight with the stretchable left subsidiary tightening belt and the stretchable right subsidiary tightening belt. 
     Attachment and detachment of the left main belt and the right main belt to and from each other using the hook-and-loop fastener facilitates the work of wearing the waist belt of the present disclosure by winding it around the waist portion of the user. Likewise, fixation of the left fixation ring to the left main belt and fixation of the right fixation ring to the right main belt using the hook-and-loop fasteners enables concurrent tightening of either the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt, either the right tightening belt or a set of the right inner tightening belt and the right outer tightening belt, the left subsidiary tightening belt, and the right subsidiary tightening belt. Tightening either the left tightening belt or a set of the left inner tightening belt and the left outer tightening belt, either the right tightening belt or a set of the right inner tightening belt and the right outer tightening belt, the left subsidiary tightening belt, and the right subsidiary tightening belt is the most laborious work. Facilitating this tightening work therefore reduces the strain on the user. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a back-side development view of a waist belt given as an example of the present disclosure. 
         FIG. 2  is a front-side development view of the waist belt given as the example. 
         FIG. 3  is a back-side development view equivalent to  FIG. 1  of a waist belt given as a modification example 1. 
         FIG. 4  is a back-side development view equivalent to  FIG. 1  of a waist belt given as a modification example 2. 
         FIG. 5  is a back-side development view equivalent to  FIG. 1  of a waist belt given as a modification example 3. 
         FIG. 6  is a front-side perspective view of the waist belt given as the example. 
         FIG. 7  is a back-side perspective view of the waist belt given as the example. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The following describes an embodiment for carrying out the present disclosure with reference to the drawings. As illustrated in  FIG. 1  and  FIG. 2  for example, a waist belt  1  of the present disclosure can be formed substantially in a diamond outer shape viewed from the front side, in which: the neighborhood of the center of the back side thereof to be worn on a waist portion  81  of a user  8  is the widest; and a left main belt  2  and a right main belt  3  extending leftward and rightward narrow toward a left end  21  and a right end  32 , respectively. It is thought possible that the left main belt  2  and the right main belt  3  may be formed to have the same widths from the back side to the front side. However, because the user  8  is compressed by immobilization of an abdominal portion thereof, the waist belt  1  preferably has the outer shape of this example that is relatively narrower in the front side when being worn (refer to  FIG. 6  and  FIG. 7  to be explained later). 
     The waist belt  1  of this example includes: a left main belt  2 , a right main belt  3 , a left inner tightening belt  43 , a left outer tightening belt  44 , a right inner tightening belt  53 , and a right outer tightening belt  54  that are nonstretchable; and a left subsidiary tightening belt  6  and a right subsidiary tightening belt  7  that are stretchable. The left main belt  2 , the right main belt  3 , the left inner tightening belt  43 , the left outer tightening belt  44 , the right inner tightening belt  53 , and the right outer tightening belt  54  are preferably formed of nonstretchable cloth, which does not stretch upward, downward, rightward, or leftward. The left main belt  2  and the right main belt  3  may be entirely flexible so as to fit tightly on the waist portion  81  of the user  8 , or may be stretchable upward and downward. Directions in which the left subsidiary tightening belt  6  and the right subsidiary tightening belt  7  stretch are preferably limited to directions of their extension so as to be effectively stretchable in the directions of their extension. 
     The left main belt  2  and the right main belt  3  have bilaterally symmetric structures. Therefore, descriptions of the right main belt  3  are added in parentheses to those of the left main belt  2 , and differences therebetween are described separately. The left main belt  2  (right main belt  3 ) has, in a development view ( FIG. 1 ) from the back side, a structure such that: at the right end  22  (left end  31 ) of a belt main body  24  (belt main body  34 ) made of mesh cloth that tapers from the right end  22  (left end  31 ) toward the left end  21  (right end  32 ), an antislip folded-binding part  244  (antislip folded-binding part  344 ) is provided; an elastic reinforcement resin core is inserted into the antislip folded-binding part  244  (antislip folded-binding part  344 ); on the outer surface of the left-half area of the belt main body  24  (belt main body  34 ) from the left end  21  (right end  32 ), a male surface  242  of a hook-and-loop fastener (male surface  342  of the hook-and-loop fastener) are attached; and binding  243  (binding  343 ) is provided on the outer rim of the belt main body  24  (belt main body  34 ) excluding the reinforcement part  244  (reinforcement part  344 ). 
     The belt main body  24  (belt main body  34 ) made of mesh cloth functions not only to allow secure ventilation so as to prevent stuffiness due to the waist belt  1  covering the waist portion  81  of the user  8  but also to reduce the weight of the waist belt  1  to no small extent. The antislip folded-binding part  244  (antislip folded-binding part  344 ) has an antislip device provided on the front side thereof that makes surface contact with the waist portion  81  of the user  8  and causes the right end  22  (left end  31 ) of the belt main body  24  (belt main body  34 ) to follow the waist portion  81  of the user  8  with elastic deformation of the reinforcement resin core inserted therethrough. At the same time, by the action of the reinforcement resin core, the antislip folded-binding part  244  (antislip folded-binding part  344 ) suppresses or prevents twisting and deformation of the right end  22  (left end  31 ) due to tensile force generated when being pulled by the left inner tightening belt  43  (right inner tightening belt  53 ) and the left subsidiary tightening belt  6  (right subsidiary tightening belt  7 ) that are attached to the right end  22  (left end  31 ). 
     In the left main belt  2  (right main belt  3 ), sewing attachment of the antislip folded-binding part  244  (antislip folded-binding part  344 ) is utilized to have the right end  432  (left end  531 ) of the left inner tightening belt  43  (right inner tightening belt  53 ) connected to the belt main body  24  (belt main body  34 ) in a lower stage (an upper stage) of the lower half of the right end  22  (left end  31 ). Therein, the right end  442  (left end  541 ) of the left outer tightening belt  44  (right outer tightening belt  54 ) is slipped under a female surface  242  of the hook-and-loop fastener (female surface  342  of the hook-and-loop fastener), thereby being connected to the belt main body  24  (belt main body  34 ). Furthermore, in the left main belt  2  (right main belt  3 ), sewing attachment of the antislip folded-binding part  244  (antislip folded-binding part  344 ) is utilized to have a right folding-back ring  23  (left folding-back ring  33 ), through which the right inner tightening belt  53  (left inner tightening belt  43 ) is passed, provided to an upper stage (a lower stage) of the lower half of the right end  22  (left end  31 ) via an attachment flap attached to the right inner tightening belt  53  (left inner tightening belt  43 ). The right folding-back ring  23  (left folding-back ring  33 ) is preferably made of resin. 
     The right main belt  3  of this example, the male surface  341  of the hook-and-loop fastener is provided on the inner side of the right end  32 , as illustrated in  FIG. 2 . This structure enables the waist belt  1  of this example to be worn in the following manner. With the right end  22  and the left end  31  of the left main belt  2  and the right main belt  3  placed on the waist portion  81  of the user  8  while being opposed to each other, the right main belt  3  wound around from the right side in the same manner as the left main belt  2  is overlaid on the left main belt  2  wound around from the left side and brought into surface contact with an abdominal portion of the user  8 , and the male surface  341  of the hook-and-loop fastener provided on the inner surface of the right end  32  of the right main belt  3  is engaged with the female surface  242  of the hook-and-loop fastener provided on the outer surface of the left main belt  2  (refer to  FIG. 6  and  FIG. 7  to be explained later). 
     The left inner tightening belt  43  (right inner tightening belt  53 ) is extended rightward (leftward) from the right end  22  (left end  31 ), of the left main belt  2  (right main belt  3 ), to which the right end  432  (left end  531 ) thereof is connected and passed through the left folding-back ring  33  (right folding-back ring  23 ) to be folded back leftward (rightward), and has a left linking ring  433  (right linking ring  533 ) provided at the left end  431  (right end  532 ). The left inner tightening belt  43  (right inner tightening belt  53 ) is made of the same nonstretchable belt material as a conventional waist belt or the like of the same kind is made of. The left linking ring  433  (right linking ring  533 ) is preferably made of resin. 
     The left outer tightening belt  44  (right outer tightening belt  54 ) is extended rightward (leftward) from an end edge of the female surface  242  of the hook-and-loop fastener (the female surface  342  of the hook-and-loop fastener) to which the right end  442  (the left end  541 ) is connected, is passed through the left linking ring  433  (right linking ring  533 ) and folded back leftward (rightward), is passed further through the left fixation ring  45  (right fixation ring  55 ) and folded back rightward (leftward), and has the left end  441  (right bed  542 ) connected to the left end  61  (right end  72 ) of the left subsidiary tightening belt  6  (right subsidiary belt  7 ). The left fixation ring  45  (right fixation ring  55 ) is preferably made of resin. A left tab  451  (right tab  551 ) provided with a male surface of the hook-and-loop fastener is attached to the left fixation ring  45  (right fixation ring  55 ). The left outer tightening belt  44  (right outer tightening belt  54 ) and the left tab  451  (right tab  551 ) are made of the same belt material as the left inner tightening belt  43  (right inner tightening belt  53 ). 
     The left subsidiary tightening belt  6  of this example is a rubber belt stretchable in the direction of extension thereof, has the right end  62  thereof connected to the upper half of the right belt main body  34  by utilizing the sewing attachment of the antislip folded-binding part  344 , is connected to an insertion ring  63  at one point, has a part thereof that continues from this point extended leftward from the insertion ring  63 , and has the left end  61  thereof connected to the left end  441  of the left outer tightening belt  44 . The insertion ring  63  serves as an undeformable through-hole formed in the middle of the left subsidiary tightening belt  6 . The right subsidiary tightening belt  7  of this example is a rubber belt stretchable in the direction of extension thereof likewise, has the left end  71  thereof connected to the upper half of the left belt main body  24  by utilizing the sewing attachment of the antislip folded-binding part  244 , is passed through the insertion ring  63  and extended rightward, and has the right end  72  thereof connected to the right end  542  of the right outer tightening belt  54 . 
     The waist belt  1  of this example (refer to  FIG. 1  and  FIG. 2 ) has, between the right end  22  of the left main belt  2  and the left end  31  of the right main belt  3 , the left inner tightening belt  43 , the right inner tightening belt  53 , the left subsidiary tightening belt  6 , and the right subsidiary tightening belt  7  arranged next to each other in this order from the lower side to the upper side, so that the width of the waist belt  1  has a wide width (length in the upward/downward direction) obtained by adding the widths of these belts. Here, if it is desired that a width of a surface making contact with the waist portion  81  of the user  8  be somewhat narrower, the width of the waist belt  1  can be reduced, for example, in the following manner as in the case of a modification example 1 illustrated in  FIG. 3 . The right inner tightening belt  53  passed through the right folding-back ring  23  and folded back is extended rightward after being inserted through the left folding-back ring  33  through which the left inner tightening belt  43  is passed to be folded back, so that the levels of the right folding-back ring  23  and the left folding-back ring  33  are uniformed. 
     The waist belt  1  of this example is configured to have the left main belt  2  and the right main belt  3  strongly tightened through folding back in two stages, which is achieved on one hand by the left inner tightening belt  43  and left outer tightening belt  44  that are nonstretchable being folded back, and on the other hand by the right inner tightening belt  53  and the right outer tightening belt  54  being tightened likewise. If such strong tightening is not needed, a left tightening belt  4  and a right tightening belt  5  that are nonstretchable can be used while being folded back in one stage, for example, in a manner as in the case of a modification example  2  illustrated in  FIG. 4  or a modification example 3 illustrated in  FIG. 5 . The waist belt  1  of the modification example 2 corresponds to the example (refer to  FIG. 1  and  FIG. 2 ) by including the left tightening belt  4  and the right tightening belt  3  are suspended through the left folding-back ring  33  and the right folding-back ring  23 , respectively, that are located at upper and lower neighboring positions. The waist belt  1  of the modification example 3 corresponds to the modification example 1 (refer to  FIG. 3 ) with the left folding-back ring  33  and the right folding-back ring  23  the levels of which are uniformed, and with the right tightening belt  3  passed through the left folding-back ring. 
     In the waist belt  1  of each of the modification example 2 and the modification example 3, the left tightening belt  4  (right tightening belt  5 ) has the right end  42  (left end  51 ) thereof connected to the right end  22  (left end  31 ) of the left main belt  2  (right main belt  3 ) by utilization of the sewing attachment of the antislip folded-binding part  244  (antislip folded-binding part  344 ), is passed through the left folding-back ring  33  (right folding-back ring  23 ) connected to the left end  31  (right end  22 ) of the right main belt  3  (left main belt  2 ) and folded back leftward (rightward), and is passed further through the left fixation ring  45  (right fixation ring  55 ) and folded back rightward (leftward), and has the left end  41  (right end  52 ) thereof connected to the left end  61  (right end  72 ) of the left subsidiary tightening belt  6  (right subsidiary tightening belt  7 ). The left tightening belt  4  (right tightening belt  5 ) is made of the same nonstretchable belt material as a conventional waist belt or the like of the same kind is made of. 
     The waist belt  1  of the example is worn on the waist portion  81  of the user  8 , for example, in the following manner (while it is obvious that the user  8  is free to follow any manner in which to wear it). In the waist belt  1 , the following is performed in advance. The left tab  451  of the left fixation ring  45  and the right tab  551  of the right fixation ring  55  are detached from the female surfaces  242  and  342  of the hook-and-loop fastener that are provided on the outer surface the left main belt  2 , so that the right main belt  3 , and the left inner tightening belt  43 , the left outer tightening belt  44 , the right inner tightening belt  53 , and the right outer tightening belt  54  are loosened. The user  8  places the thus loosened waist belt  1  on the waist portion  81  of the user  8  in a manner such that the left and right antislip folded-binding parts  244  and  344  can be bilaterally symmetric across the backbone; then winds around the left main belt  2  from the left side to the front side first; then winds around the right main belt  3  from the right side to the front side; and engages the male surface  341  of the hook-and-loop fastener on the left main belt  2  with the female surface  242  of the hook-and-loop fastener. In this manner, the waist belt  1  is wound around the waist portion  81  of the user  8  to the extent that it is kept from falling off. 
     Starting from this state, the following is performed, so that wearing the waist belt  1  is completed as illustrated in  FIG. 6  and  FIG. 7 . The left tab  451  is pulled from the left side toward the front side; and, at the point where the left inner tightening belt  43 , the left outer tightening belt  44 , and the left subsidiary tightening belt  6  are adequately tightened, the male surface of the hook-and-loop fastener provided on the left tab  451  is engaged with the female surface  242  provide on the outer surface of the left main belt  2 , so that the left fixation ring  45  is fixed. Likewise, the right tab  551  is pulled from the right side toward the front side; and, at the point where the right inner tightening belt  53 , the right outer tightening belt  54 , and the right subsidiary tightening belt  7  are adequately tightened, the male surface of the hook-and-loop fastener provided on the right tab  551  is engaged with the female surface  342  provide on the outer surface of the right main belt  3 , so that the right fixation ring  63  is fixed. 
     In the waist belt  1  of the example, while the waist belt  1  is worn on the waist portion  81  of the user  8 , a set of the left inner tightening belt  43  and the left outer tightening belt  44  and a set of the right inner tightening belt  53  and the right outer tightening belt  54  squeeze tight around the lower half of the waist portion  81 , and the left subsidiary tightening belt  6  and the right subsidiary tightening belt  7  squeeze tight around an upper part of the constricted waist portion  81  at the same time, so that the left main belt  2  and the right main belt  3  are brought into wide surface contact with the waist portion  81  (refer to  FIG. 7 ). Here, how much the left inner tightening belt  43 , the left outer tightening belt  44 , and the left subsidiary tightening belt  6  squeeze and how much the right inner tightening belt  53 , the right outer tightening belt  54 , and the right subsidiary tightening belt  7  squeeze are made different by how the left tab  451  and the right tab  551  are pulled. Therefore, levels of squeezing in the left and the right sides can be made different while the left main belt  2  and the right main belt  3  are kept making wide surface contact with the waist portion  81 . 
     When the user  8  moves while wearing the waist belt  1 , the left subsidiary tightening belt  6  and the right subsidiary tightening belt  7  individually elongate and contract, and the left main belt  2  and the right main belt  3  are kept in tight contact with the upper half of the constricted waist portion  81 . At the same time, the elongation and contraction of the left subsidiary tightening belt  6  and the right subsidiary tightening belt  7  absorb the move of the user  8 , so that the left outer tightening belt  44  and the right outer tightening belt  54 , and, via the left outer tightening belt  44  and the right outer tightening belt  54 , the left inner tightening belt  43  and the right inner tightening belt  53  are allowed to follow the move of the user  8  while being pulled and kept tense. Consequently, the left main belt  2  and the right main belt  3  can be kept making wide surface contact with the waist portion  81 . 
     REFERENCE SIGNS LIST 
     
         
           1  waist belt 
           2  left main belt 
           21  left end 
           22  right end 
           23  right folding-back ring 
           24  belt main body 
           242  female surface of hook-and-loop fastener 
           243  binding 
           244  antislip folded-binding part 
           3  right main belt 
           31  left end 
           32  right end 
           33  left folding-back ring 
           34  belt main body 
           341  male surface of hook-and-loop fastener 
           342  female surface of hook-and-loop fastener 
           343  binding 
           344  antislip folded-binding part 
           4  left tightening belt 
           41  left end 
           42  right end 
           43  left inner tightening belt 
           431  left end 
           432  right end 
           433  left linking ring 
           44  left outer tightening belt 
           441  left end 
           442  right end 
           45  left fixation ring 
           451  left tab 
           5  right tightening belt 
           51  left end 
           52  right end 
           53  right inner tightening belt 
           531  left end 
           532  right end 
           533  right linking ring 
           54  right outer tightening belt 
           541  left end 
           542  right end 
           55  right fixation ring 
           551  right tab 
           6  left subsidiary tightening belt 
           61  left end 
           62  right end 
           63  insertion ring 
           7  right subsidiary tightening belt 
           71  left end 
           72  right end 
           8  user 
           81  waist portion