Patent Publication Number: US-2005121957-A1

Title: Bag for body supporter

Description:
BACKGOUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to a bag for accommodating a body support assembly in order to place the body support assembly on a seat, a chair or the like, wherein the body support assembly can maintain the shape thereof matching the sitting posture of a user (the body shape) so as to provide a fitting feeling to the user according to the individual user&#39;s body shape.  
      2. Description of the Related Art  
      Seats or chairs, for example, various kinds of automotive seats are manufactured so as to fit an average user. Accordingly, they do not fit properly in some users.  
      Consequently, various kinds of body support assemblies (lumbar supports) have been conventionally proposed as means for solving the above-described problem. In general, those body support assemblies are ones that allow a pressingly deformable supporting member such as a cushion to contact a user&#39;s body portion so as to deform in a shape according to the user&#39;s body portion, then allowing the deformed supporting member to maintain its deformed shape.  
      Inventors including the inventor of the present invention, for example, have pursued usefulness of those kinds of body support assemblies and have once proposed a body support assembly in Japanese Unexamined Patent Publication No. 2001-128803 aiming at providing such useful body support assemblies as to be not only able to maintain a shape matching the sitting posture of the user, but also easy to care for because its structure is simple. This body support assembly comprises a cushioning body having flexibility and a covering body formed in a sheet-like shape and impregnated with curable resin, the covering body covering the cushioning body. This body support assembly is used by allowing the cushioning body and the covering body to contact a user&#39;s body portion so as to be deformed and then cured to a shape according to the user&#39;s body portion.  
      This body support assembly can be easily formed in the shape matching the sitting posture of the user (the body shape) employing a structure that the covering body cures so as to maintain its shape but its content is a cushioning body having flexibility, and thus it can provide not only hardness but also moderate flexibility. Therefore, this body support assembly can provide the user with well-supported and comfortable sitting feeling. Furthermore, this body support assembly can be produced only by allowing the cushioning body to be covered with the covering body impregnated with the curable resin, and thus it has advantages such as superior mass productivity and low manufacturing costs. Accordingly, this body support assembly was innovative at that time.  
      The above-described body support assembly, however, has inferior appearance, providing inferior tactile sensation or the like, and thus it needs to be used with the same being put into a bag having good appearance, providing good tactile sensation or the like. Moreover, since this body support assembly is one that fixes the cushioning body in the deformed condition, the body support assembly sometimes becomes too thin particularly in a top edge portion of a center of the body support assembly that is pressed by the user&#39;s body, and thus the cushioning body partially also becomes too thin, or in some cases, there may appear a cured portion where the front and back of the sheet-like covering body are directly overlapped without the cushioning body therebetween. Further, as the shape of the cushioning body can be fixed due to curing of a moisture curable resin, the curing time thereof varies widely depending on the environmental temperature or the like. Furthermore, the moisture curable resin itself generates heat when cured, and thus the user sitting down for giving the resin a specific shape feels uncomfortable. On the other hand, the moisture curable resin has a noticeable property of heat absorption after cured, and thus the moisture curable resin is likely to absorb external heat so that the user feels cold while using this body support assembly. Accordingly, a bag which can solve those problems have been desired.  
      The present invention has been made to solve the above-described problems, and it is accordingly an object thereof to provide a bag for a body support assembly which can stabilize the curing time by avoiding influence of environmental temperature on the curing time and improve a fitting feeling of the body support assembly. Another object thereof is to provide the bag for the body support assembly which is suitable for use in a seat, a chair or the like.  
     SUMMARY OF THE INVENTION  
      In order to attain the above objects, according to a first aspect of the present invention, there is provided a bag for accommodating a body support assembly, the body support assembly including a cushioning body having flexibility and a covering body formed in a sheet-like shape and being impregnated with curable resin, the covering body covering the cushioning body, the bag being used by allowing: the cushioning body to contact a user&#39;s body so as to deform in a shape matching the user&#39;s body; and then allowing the covering body to be cured, wherein: the bag is a pouched body comprising: a front face covering member provided on one side for contacting the user&#39;s body; and a rear face covering member provided on an opposite side; and a heat insulation layer is provided at least on the front face covering member.  
      According to the above-described structure, the heat insulation layer is provided in between the body support assembly and the user&#39;s body, and thus a heat loss of the user&#39;s body caused by the body support assembly can be prevented. Accordingly, cooling off the user&#39;s waist, hip, back or the like can be prevented, and thus usability of the body support assembly can be improved. Moreover, the body support assembly can be deformed by allowing the moisture curable resin or the like to cure, but the moisture curable resin is sensitive to environmental temperature such that it takes longer time to cure at lower temperature. Based on focusing on the property that the moisture curable resin itself generates heat when cured, the heat insulation layer is provided on the front face covering member so as to retain the heat generated by the curing reaction and avoid influence of the environmental temperature on the curing time. Accordingly, the curing time can be stabilized, while the heat generated by the curing reaction is not transferred to the user so that he/she does not feel uncomfortable.  
      In order to attain the above objects, according to a second aspect of the present invention, there is provided a bag for accommodating a body support assembly, the body support assembly including a cushioning body having flexibility and a covering body formed in a sheet-like shape and being impregnated with curable resin, the covering body covering the cushioning body, the bag being used by allowing: the cushioning body to contact a user&#39;s body so as to deform in a shape matching the user&#39;s body; and then allowing the covering body to be cured, wherein: the bag is a pouched body comprising: a front face covering member provided on one side for contacting the user&#39;s body; and a rear face covering member provided on an opposite side; and a cushioning layer is provided at least on the front face covering member.  
      According to the above-described structure, the cushioning layer is provided between the body support assembly and the user&#39;s body. Therefore, feelings when the hip, waist, back or the like of the user contacts the body support assembly can be improved.  
      Alternatively, in the above-described bag, the cushioning layer may be arranged so as to cover at least a peripheral top edge of the body support assembly. In the body support assembly, when the moisture curable resin cures so as to retain its shape, the body support assembly sometimes becomes too thin in an edge portion of the body support assembly, particularly in the top edge portion thereof, and thus the cushioning body also becomes partially too thin, or in some cases, there may appear a cured portion where the front and back of the sheet-like covering body are directly overlapped without the cushioning body therebetween. Therefore, the user feels uncomfortable when this portion contacts the user&#39;s body. By arranging the cushioning layer to cover at least the top edge of the body support assembly, the uncomfortable feeling is eased up, and thus the usability of the bag and the body support assembly can be improved.  
      Moreover, in the above-described bag, the front face covering member may have air permeability. Accordingly, the user can use the bag comfortably without getting sweaty.  
      Further, the rear face covering member may be formed with an opening. By employing this structure, the body support assembly can put in/out via the opening.  
      Still further, the rear face covering member may include a Hook-and-Loop fastener on a surface thereof. By employing this structure, the bag can be positioned in a desired place on a seat having a corresponding Hook-and-Loop fastener.  
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a front view showing a bag for a body support assembly according to a first embodiment of the present invention;  
       FIG. 2  is a rear view showing the bag of  FIG. 1 ;  
       FIG. 3  is an enlarged cross sectional view showing the bag of  FIG. 1  along a line A-A;  
       FIG. 4  is an enlarged sectional view showing the bag of  FIG. 1  along a line B-B;  
       FIG. 5  is an enlarged sectional view showing the bag of  FIG. 2  along a line C-C;  
       FIG. 6  is a perspective view showing a body support assembly available to the bag of  FIG. 1 ;  
       FIG. 7  is a perspective view showing a condition where the bag of  FIG. 1  is used;  
       FIG. 8  is a graph for explaining a curing condition of the bag of the  FIG. 1  at a temperature of 23° C.;  
       FIG. 9  is a graph for explaining temperatures of various portions of the bag shown in  FIG. 1  when curing;  
       FIG. 10  is a cross sectional view showing a portion adjacent to a top edge of a bag for a body support assembly according to a second embodiment of the present invention; and  
       FIG. 11  is a cross sectional view showing a portion adjacent to a peripheral of the bag shown in  FIG. 10 . 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
      Hereunder is a detailed description of a bag for a body support assembly according to a first embodiment of the present invention with reference to  FIGS. 1 through 7 . As shown in  FIGS. 1 through 5 , the bag  1  for a body support assembly is a pouched body formed in an essentially rectangular shape having a longer lateral side than a longitudinal side thereof. The bag  1  comprises a front face covering member  2  coming into contact with a user&#39;s body and a rear face covering member  3  coming into contact with an automotive seat or the like. The front face covering member  2  and the rear face covering member  3  are sewn together, while a code  4  is provided on a boundary portion of both of the front face covering member  2  and rear face covering member  3  so as to be essentially parallel to an edge of the bag  1 . A length of the front face covering member  2  in its vertical direction is longer than that of the rear face covering member  3 . Accordingly, the front face covering member  2  extends around to a rear side of the bag  1  in top and bottom edges of the bag  1 . The code  4  is also arranged on the rear side along with the front face covering member  2  extending around thus way.  
      In the above-described bag  1 , the front face covering member  2  comprises a heat insulation layer  5 , a cushioning layer  6  and a skin member  7 . The heat insulation layer  5  is provided inwardly relative to the cushioning layer  6 , while the skin member  7  covers the cushioning layer  6 . For a material of the heat insulation layer  5 , there is no specific limitation. For example, “ThinasulateOS-100” made by SUMITOMO 3M Ltd. can be used. Moreover, for a material of the cushioning layer  6 , there is no specific limitation either, but various kinds of foaming material such as polyurethane can be used. For example, “UEM 35” (registered trademark) made by INOAC (registered trademark) corporation can be used. Further, as a material of the skin member  7 , a piece of sheet, fabrics or the like having a pleasing appearance and providing well-fitting feeling can be used since it contacts the user&#39;s body and forms the contour of the bag. In particular, one having air permeability is preferable. For example, knitted fabric made of polyester fiber is preferred. By employing the above-described structure, the front face covering member  2  itself can ensure proper air flow. The rear face covering member  3  is made from a stretchable member  8  such as knitted material made of polyester having air permeability, while the stretchable member  8  employs a structure that an upper section  8 A and a lower section  8 B are overlapped with each other at a bottom end thereof so as to form an opening  9  in a lateral direction of the rear face covering member  3 . The opening  9  is openable and closeable by fasteners  10 ,  10 A. Moreover, as shown in  FIG. 3 , the code  4  is covered with the skin member  7  and provided between the front face covering member  2  and the rear face covering member  3 . Meanwhile, in FIGS.  1  to  5 , reference number  11  denotes a sewing thread, while reference number  12  denotes a tag for applying a trademark or the like. Further, reference number  13  denotes one of a pair of Hook-and-Loop fasteners for fixing a position of the bag  1  on the automotive seat, provided on a center of a surface of the rear face covering member  3  so that its longitudinal direction is parallel to the longitudinal direction of the rear face covering member  3 . In this embodiment, the front face covering member  2  is structured by laminating the heat insulation layer  5 , the cushioning layer  6  and the skin member  7  together.  
      There is no specific limitation for the body support assembly to be put into the bag  1 . Various types of the body support assemblies, which can be naturally put into the above-described bag  1  without excessive pressure, can be used. An example of the body support assembly put into the bag  1  is illustrated in  FIG. 6 . This body support assembly  21  comprises a cushioning body  22  as a supporter having flexibility and a covering body  23  covering the cushioning body  22 , the covering body  23  formed in a sheet-like shape and impregnated with curable resin. The cushioning body  22  is covered with the covering body  23  so as to be wrapped from a front side thereof. On a rear side thereof, particularly on a center of the rear side in this embodiment, both ends of the covering body  23  are overlapped with each other so as to form a linear overlapped portion S along a longitudinal direction of the covering body  23 . Both of the edges of the covering member  23  are joined. Moreover, a top edge  23 A of a portion of the covering body  23  covering the front side of the cushioning body  22  contacts a top edge  23 B of a portion of the covering body  23  covering the rear side of the cushioning body  22 . Both of the top edges  23 A and  23 B are joined in a manner clipped by clipping means such as needles  25  of a stapler via a tape  24  as an inclusion. Accordingly, a flanged joining portion  26  is formed, while the flanged joining portion  26  forms a thin edge  27  diminishing gradually from a top edge of the cushioning body  22 . In the above-described body support assembly  21 , the cushioning body  22  as a flexible material comprises a foaming material formed in a horizontal block-shape, having flexibility and air permeability. As an example of the foaming material formed in a horizontal block-shape, sponge may be considered. Moreover, the covering body  23  comprises a cloth impregnated with curable resin. As preferable resin may be used moisture curable resin such as moisture curable urethane having a property that it cures in a short time by getting moist, for example, by adding water thereto or by soaking the same in water, or catalytic curable resin having a property that it cures in a short time by adding catalyst solution thereto. For example, a casting product (that is, a so-called “SEANE”) made by 3M HEALTH CARE K.K. is commercially available as the above-described covering body  23 . This casting product has a property that it cures strongly and firmly in a short time when being soaked in water.  
      The body support assembly  21  is put into a non-illustrated moisture-proof bag and sealed therein. Accordingly, since the covering body  23  is not exposed to moisture in this sealed condition, the curing of the curable resin is reliably prevented. On the other hand, the covering body  23  can be cured in a short time by opening the moisture-proof bag and then applying water or spraying a catalyst solution thereto so as to allow the curable resin to be exposed to moisture.  
      The body support assembly  21  is put into the bag  1  via the opening  9  so that the top edges  23 A,  23 B thereof are to be disposed upside. Then, as shown in  FIG. 7 , the bag  1  is provided on the automotive seat  31 . To be more precise, the body support assembly  21  is used for supporting a waist of the user in this embodiment. Meanwhile, reference number  32  in  FIG. 7  denotes the other of the pair of Hook-and-Loop fasteners having flexibility for fixing the position of the bag  1 . The other Hook-and-Loop fastener is provided on the seat  31  so that its longitudinal direction is parallel to a horizontal direction of the seat  31 . Meanwhile, reference number  33  denotes a headrest of the seat  31 .  
      Next, operations of the bag  1  employing the above-described structure will now be explained. First of all, the body support assembly  21  is taken out from the moisture-proof bag (not shown). Water is sprayed to the covering body  23  of the body support assembly  21  so that the covering body  23  is given moisture content. Then, excessive moisture content is wiped off. Accordingly, the curable resin with which the covering body  23  is impregnated starts curing. Next, the fasteners  10 ,  10 A are opened, and the body support assembly  21  is put into the bag  1  via the opening  9 . Then, the bag  1  with the body support assembly  21  is attached to the automotive seat  31  or the like so that the top edges  23 A,  23 B of the body support assembly  21  are positioned upside, with the bag  1  being in an upright condition and the skin member  7  facing the seat  31 . In this embodiment, one of the Hook-and-Loop fasteners as denoted by numeral  13  is provided on the center of the rear face covering member  3  along its vertical direction, while the other of the Hook-and-Loop fasteners having flexibility as denoted by numeral  32  is provided on the seat  31  along its horizontal direction. Accordingly, the bag  1  can be provided on a desired position within a range in which those Hook-and-Loop fasteners  13 ,  32  can stick to each other. The vertical and horizontal directions of the Hook-and-Loop fasteners  13 ,  32  may be vice versa. Alternatively, a surface of the seat  31  may comprise a material able to stick to the Hook-and Loop fastener  13  so that the bag  1  can be positioned on a desired position on the seat  31 . Meanwhile, the Hook-and-Loop fasteners  13 ,  32  may be velvet fasteners.  
      Subsequently, when the user sits down while applying his/her weight to the bag  1 , the body support assembly  21  is deformed by press. The covering body  23  cures with the deformed shape being maintained if the user keeps his/her sitting posture for a predetermined time. Accordingly, the cushioning body  22  can be kept in the deformed shape by this hardened layer (covering body  23 ).  
      Thus way, the body support assembly  21  and the front face covering member  2  can be instantly and easily deformed matching the sitting posture of the individual user, while a portion of the body support assembly  21  and the rear face covering member  3  contacting the seat  31  can be deformed smoothly into the shapes in accordance with the shape of the seat  31  and then cured. Accordingly, the bag  1  and the body support assembly  21  can be provided on the seat  31  in a manner that is unlikely to cause a displacement thereof relative to the seat  31 .  
      In the above-described body support assembly  21 , the covering body  23  cures after deforming the cushioning body  22  into the shape matching the user&#39;s body. Accordingly, the cushioning body  22  is likely to become too thin in the top edge portion of the covering body  23 . In some cases, there may appear a cured portion where the front and back of the covering body  23  are directly overlapped without the cushioning body  22  therebetween. As a result, a portion having less cushioning property would be appeared. If the back, waist or the like of the user contacts this portion, then it would result in an uncomfortable feeling of the user. In this embodiment, however, the front face covering member  2  of the bag  1  accommodating the body support assembly  21  has a longer vertical dimension than that of the rear face covering member  3  and extends around to the rear side of the bag  1  so as to cover the peripheral top edge of the body support assembly  21 . Moreover, the cushioning layer  6  is provided on the front face covering member  2 . Accordingly, the uncomfortable feeling to the user&#39;s body can be relieved.  
      Moreover, the moisture curable resin with which the covering body  23  is impregnated generates heat itself when cured. When the heat thus generated is transferred to the user sitting for deforming the body support assembly  21 , the user would feel uncomfortable at his/her waist, etc. Further, the moisture curable resin has a problem that the curing time varies depending on an outside air temperature, such as shorter curing time at higher temperature, while longer curing time at lower temperature. As a means for solving those problems concurrently, the inventor of the present invention proposes to provide the heat insulation layer  5  on the front face covering member  2  for the body support assembly  21 , thus making it possible to confine the heat generated by the curing reaction so as to prevent the heat from being transferred to the user, and to stabilize the time taken for the body support assembly  21  to be fixedly deformed into a specific shape irrespective of factors from the outside air.  
      Further, after the body support assembly  21  is formed, there were problems that due to its comparatively large specific heat than that of a normal cushioning member, the body support assembly  21  would be likely to deprive the sitting user of heat so that the user gets too cool at his/her waist in winter season or the like, and yet it takes a long time to get warm. In the present embodiment, however, the heat insulation layer  5  provided on the front face covering member  2  of the bag  1  for the body support assembly  21  can prevent the bodily temperature of the user from going away toward the body support assembly  21 . Besides, since the heat insulation layer  5 , the cushioning layer  6 , the skin member  7  and the stretchable member  8  comprising the front face covering member  2  are each made from materials having air permeability, the user can use the bag  1  comfortably without getting sweaty.  
      The bag  1  for the body support assembly  21  has been described with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiment. Various modifications may be possible. For example,  FIGS. 10 and 11  show a second embodiment of the present invention. In the above-described embodiment, the heat insulation layer  5  and the cushioning layer  6  are provided separately. However, some foaming materials or the like have both heart insulation property and flexibility property. Accordingly, the heat insulation layer  5  and the cushioning layer  6  may be combined as one cushioning layer  6 A having heart insulation property by using that kind of foaming materials or the like. Alternatively, a material having both heart insulation property and flexibility may be used for the skin member  7 . In that case, the front face covering member may comprise a single layer of the skin member  7 .  
      Further, the body support assembly  21  is not limited to one described in the above embodiment, nor is the shape thereof particularly. The bag  1  can be formed in various shapes matching the shape of the body support assembly  21 .  
      The present invention will now be explained in more detail along with the examples explained below.  
     FIRST EXAMPLE  
      The bag  1  which is formed in a shape as shown in FIGS.  1  to  5  has a width of 460 mm, a height of 270 mm and a thickness of about 40 mm when accommodating the body support assembly  21 . The front face covering member  2  of the bag  1  comprises: the heat insulation layer  5 ; the cushioning layer  6  (polyurethane foam) and the skin member  7 , while the rear face covering member  3  comprises the stretchable member  8  (a knitted cloth made of polyester). The body support assembly  21  having a thickness of about 40 mm was moisturized and then put into the bag  1 . The body support assembly  21  was compressed by a letter-L jig over the bag  1  to have the thickness of about 20 mm. The bag  1  was kept in an atmosphere of 23° C., while the letter-L jig was removed once per 10 minutes so as to measure the change of the thickness of the body support assembly  21 . The results of the measurement are shown in a graph of  FIG. 8 . Meanwhile, a thickness of 21 mm is assumed to be a stable post-curing size.  
      As is apparent from  FIG. 8 , the bag  1  for the body support assembly according to this example takes about 30 minutes to reach the stable post-curing size at 23° C.  
     SECOND EXAMPLE  
      The body support assembly  21  having the thickness of about 27 mm was moisturized, and then put into the bag  1  used in the first example. The bag  1  was put on the automotive seat as shown in  FIG. 7 . Next, the bag  1  was kept in an atmosphere of 23° C. The temperatures of a central portion of the front of the body support assembly  21 , a left center portion of the front thereof, and a left center portion of the rear thereof were intermittently measured. Results of these measurements are shown in  FIG. 9 .  
      As is apparent from  FIG. 9 , the temperature of the body support assembly  21  was kept higher than the atmospheric temperature by the bag  1  of this example. To be more precise, the temperature of the central portion of the front of the body support assembly  21  was kept higher than about 40° C., the temperature of the left center portion of the front thereof was kept higher than about 37° C., and the temperature of the left center portion of the rear thereof was kept higher than about 38° C. This is because the heat insulation layer  5  retains the heat generated by curing of a moisture curable resin. Moreover, a difference in temperature between the rear side of the body support assembly  21  and the front side thereof are deceased. Accordingly, the curing time can be stabilized. On the other hand, an increase in temperature on the front side of the bag  1  coming into contact with the user&#39;s body was not perceived, and thus the user does not feel uncomfortable when sitting down for giving the bag  1  a specific shape.  
      The present invention relates to a bag  1  for accommodating a body support assembly  21 , the body support assembly  21  including the cushioning body  22  as a support member deformable by press, the bag  1  being used by allowing the cushioning body  22  to contact a user&#39;s body so as to deform in a shape matching the user&#39;s body and maintain the deformed shape, wherein: the bag  1  is a pouched body comprising: the front face covering member  2  provided on one side for contacting the user&#39;s body; and the rear face covering member  3  provided on an opposite side; and the heat insulation layer  5  is provided at least on the front face covering member  2 . A heat loss of the user&#39;s body caused by the body support assembly  21  can be prevented. Accordingly, cooling off the user&#39;s waist, hip, back or the like can be prevented, and thus usability of the body support assembly can be improved. Moreover, whilst the body support assembly  21  is deformed by curing of a moisture curable resin or the like, the moisture curable resin is sensitive to environmental temperature such that it takes longer time to cure at lower temperature. Based on focusing on the property that the moisture curable resin itself generates heat when cured, the heat insulation layer  5  is provided on the front face covering member  2  so as to retain the heat generated by the curing reaction and reduce the influence of the environmental temperature. Accordingly, the curing time can be stabilized, while the heat generated by the curing reaction is not transferred to the user so that he/she does not feel uncomfortable.  
      Moreover, the cushioning layer  6  is provided at least on the front face covering member  5 . Since the cushioning layer  6  is provided between the body support assembly  21  and the user&#39;s body, feelings when the hip, waist, back or the like of the user contacts the body support assembly can be improved.  
      The cushioning layer  6  is arranged so as to cover at least a top edge of the body support assembly  21 . In the body support assembly  21 , when the moisture curable resin cures so as to retain its shape, the body support assembly  21  sometimes becomes too thin in the edge portion of the body support assembly  21 , particularly in the top edge portion thereof, and thus the cushioning body  22  also becomes partially too thin. In some cases, there may appear a cured portion where the front and back of the sheet-like covering body  23  are directly overlapped without the cushioning body  22  therebetween. Therefore, the user feels uncomfortable when this portion having less cushioning property contacts the user&#39;s body. By arranging the cushioning layer  6  to cover at least the top edge of the body support assembly  21 , the uncomfortable feeling is eased up, and thus the usability of the body support assembly  21  can be improved.  
      In the above-described bag  1 , the cushioning layer  6  is provided on the front face covering member  2  entirely, while the front face covering member  2  is larger than the rear face covering member  3  so as to extend around the rear of the bag  1 . Thus, although the body support assembly  21  would become too thin in the edge portion of the body support assembly  21 , particularly in the top edge portion thereof, and thus the cushioning body  22  would also become partially too thin, so that the user feels uncomfortable when a portion where the cushioning body  22  partially becomes too thin contacts the user&#39;s body, yet, in the bag  1 , the cushioning layer  6  is provided on the front face covering member  2  entirely and the front face covering member  2  is formed larger so as to extend around to the rear of the bag  1 , thereby easing the uncomfortable feeling in the top edge. Accordingly, the usability of the body support assembly  21  can be improved.  
      Moreover, since the cushioning layer  6 A works as a heat insulation layer, it can prevent the body support assembly  21  from causing heat loss of the user. Accordingly, the user does not get cool at his/her waist, and thus the usability of the body support assembly  21  can be improved. Moreover, whilst the body support assembly  21  is deformed by allowing the moisture curable resin or the like to cure, but the moisture curable resin is sensitive to environmental temperature such that it takes longer time to cure at lower temperature. Based on focusing on the property that the moisture curable resin itself generates heat when cured, the heat insulation layer  5  is provided on the front face covering member  2  so as to retain the heat generated by the curing reaction and reduce the influence of the environmental temperature. Accordingly, the curing time can be stabilized, while the heat generated by the curing reaction is not transferred to the user so that he/she does not feel uncomfortable.  
      Further, the front face covering member  2  has air permeability. Accordingly, the user can use the bag  1  comfortably without getting sweaty. Moreover, the rear face covering member  3  is formed with the opening  9 . The opening  9  can be formed largely without affecting the front face covering member  2  contacting the user&#39;s body. By employing this structure, the body support assembly  21  can easily put in/out via the opening  9 . Still further, the rear face covering member  3  includes a Hook-and-Loop fastener  12  provided on a surface thereof. By employing this structure, the bag  1  can be positioned in a desired place on a seat  31  or the like having a corresponding Hook-and-Loop fastener  32 . Accordingly, positioning the bag  1  according to the user&#39;s body shape can be easily carried out.