Abstract:
An incubator comprising a mattress tray and a plurality of baby guards surrounding a vicinity of an outer periphery of the mattress tray, wherein: a first baby guard from out of the plurality of baby guards includes a grommet; the first baby guard is detachably attached to a first attachment location installed at a vicinity of the outer periphery of the mattress tray; a second baby guard from out of the plurality of baby guards is detachably attached to a second attachment location installed at a vicinity of the outer periphery of the mattress tray; and the first baby guard is detachable from the first attachment location and attachable to the second attachment location, and the second baby guard is detachable from the second attachment location and attachable to the first attachment location.

Description:
RELATED APPLICATIONS 
       [0001]    This application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2015-223756 filed on Nov. 16, 2015, the entire content of which is hereby incorporated by reference. 
       BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    Preferred embodiments relate to an incubator including a mattress tray that an infant can be laid on, and plural baby guards capable of surrounding the vicinity of an outer periphery of the mattress tray, wherein at least one baby guard from out of the plural baby guards includes a grommet. 
         [0004]    2. Description of the Related Art 
         [0005]    Incubators are already known, such as that described in Japanese Patent Application Publication (JP-A) No. 2012-223320 (referred to below as “the Patent Document”). In the incubator described in the Patent Document, a fiat container shaped bed base is installed on an incubator base. The incubator stand is respectively installed with the following so as to form a substantially rectangular shape overall in plan view: a fixed wall section that generally configures a wall section on a head side of an infant (a fixed baby guard); a leg side movable wall section that generally configures a wall section on a leg side of the infant (a movable baby guard); a left side movable wall section that generally configures a wall section on a left side of the infant (a movable baby guard); and a right side movable wall section that generally configures a wall section on a right side of the infant (a movable baby guard). A substantially cuboid shaped infant accommodation space open on an upper face is configured by the mattress tray, or in other words by a mattress on the mattress tray, and by the single fixed wall section and the three movable wall sections which may each be substantially rectangular shaped and may be substantially transparent. The three movable wall sections and the single fixed wall section are each configured overall from a substantially transparent plastic sheet. The three movable wall sections are swingable to-and-fro between an upstanding state substantially upward (referred to below as “the upstanding state”) and a hanging state substantially downward (referred to below as “the hanging state”), by swinging about swing support shafts that are installed on left and right sides, or front and rear sides, in the vicinity of lower edges in the upstanding state of the three movable wall sections. The fixed wall section is fixed by being firmly attached to the incubator stand. Moreover, a grommet member is attached to the fixed wall section. 
       SUMMARY OF THE INVENTION 
       [0006]    In the incubator of the Patent Document, when a doctor or nurse or the like is performing some kind of treatment or the like in the proximity of the head of the infant, due to the presence of an ancillary equipment support column in the vicinity of the fixed wall section generally configuring a wall section on the head side of the infant, the doctor or nurse or the like needs to perform treatment in the proximity of the head of the infant from the vicinity of the support column. The doctor or nurse or the like might conceivably perform treatment in the proximity of the head of the infant by switching over the head side of the infant and the leg side of the infant. However, when resuscitation equipment is being employed for the infant, this results in breathing tubes from the resuscitation equipment extending over a comparatively long gap from the grommet member on the fixed wall section to the proximity of the head of the infant. The breathing tubes accordingly may become twisted or kinked by the infant&#39;s own body movements, making it difficult to achieve a good supply of breathing gas from the breathing tubes to the infant. 
         [0007]    In consideration of the above circumstances, an object of preferred embodiments is to provide an incubator that effectively solves the problem described above with the incubator of the Patent Document, using a comparatively simple configuration. 
         [0008]    An incubator of a first aspect of the disclosure includes a mattress tray configured to accommodate an infant laid thereon, and plural baby guards configured to surround a vicinity of an outer periphery of the mattress tray. A first baby guard f of the plural baby guards includes a grommet, and the first baby guard is detachably attached to a first attachment location installed at a vicinity of the outer periphery of the mattress tray. A second baby guard of the plural baby guards is detachably attached to a second attachment location installed at a vicinity of the outer periphery of the mattress tray. The first baby guard is detachable from the first attachment location and attachable to the second attachment location, and the second baby guard is detachable from the second attachment location and attachable to the first attachment location. In such a configuration, the first baby guard including the grommet and the second baby guard that does not include a grommet can be interchanged with each other, thereby enabling a doctor or nurse or the like to attach the first baby guard to a convenient location. There is accordingly hardly any concern that the breathing tubes or the like might be twisted or kinked by the infant&#39;s own body movements and the like. In cases in which the first baby guard or the second baby guard has been damaged, etc., then the at least one baby guard out of the first and second baby guards can be replaced with a spare baby guard as required. The first baby guard includes the grommet and the second baby guard does not include a grommet, thereby enabling plural baby guards to be provided at a comparatively low cost compared to cases in which both the first baby guard and the second baby guard include grommets. 
         [0009]    In a second aspect of the present disclosure, the plural baby guards include a front side baby guard formed by the second baby guard, a rear side baby guard formed by the first baby guard, and a left side baby guard and a right side baby guard. Such a configuration enables an incubator with a comparatively simple structure and comparatively simple handling to be provided. In a third aspect of the present disclosure, an infant accommodation space having a substantially rectangular shape in plan view is configured by the plural baby guards. Such a configuration enables an incubator with a comparatively simple structure and comparatively simple handling when multiple incubators are handled at the same time to be provided. In a fourth aspect of the present disclosure, the incubator is an open incubator. Since the incubator is an open incubator, an incubator with a simple structure and simple handling can be provided. 
         [0010]    Other objects, characteristics, and advantages of the present disclosure as described above should easily become clear from reading the following detailed description, relating to the attached drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    Preferred embodiments will be described in detail based on the following figures, wherein: 
           [0012]      FIG. 1  is a perspective view of an open incubator of an exemplary embodiment of the present disclosure, in a normal use state; 
           [0013]      FIG. 2  is a partial side view of an infant accommodation system of the open incubator illustrated in  FIG. 1 , as viewed from a substantially front face in the vicinity of a lower portion of a corner on the left side at the front; 
           [0014]      FIG. 3A  is a partial horizontal cross-section of a wall attachment-detachment operation mechanism illustrated in  FIG. 2 , illustrated in a state in which an operation member has not yet been operated; 
           [0015]      FIG. 3B  is a similar horizontal cross-section to  FIG. 3A  of the wall attachment-detachment operation mechanism illustrated in  FIG. 3A , illustrated in a state in which the operation member is in a first operation state; 
           [0016]      FIG. 3C  is a similar horizontal cross-section to  FIG. 3A  of the wall attachment-detachment operation mechanism illustrated in  FIG. 3A , illustrated in a state in which the operation member is in a second operation state; 
           [0017]      FIG. 4  is a perspective view of an infant accommodation system of an open incubator as illustrated in  FIG. 1 ; 
           [0018]      FIG. 5  is a perspective view of the infant accommodation system illustrated in  FIG. 4 , in a state in which a head side outer wall section and a leg side outer wall section have been installed exchanged with each other; and 
           [0019]      FIG. 6  is a perspective view of the infant accommodation system illustrated in  FIG. 4 , in a state in which the leg side outer wall section and a left side outer wall section have each been opened. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0020]    Next, explanation follows regarding an exemplary embodiment of the present disclosure as applied to an open incubator (a so-called infant warmer) with reference to the drawings, under the headings: 
         [0021]    1. Brief Explanation of Overall Incubator, 
         [0022]    2. Explanation of Inner Wall Section Structure, 
         [0023]    3. Explanation of Configuration of Outer Wall Section Structure, and 
         [0024]    4. Explanation of Operation of Outer Wall Section Structure. 
       1. Brief Explanation of Overall Incubator 
       [0025]    An open incubator  11 , as illustrated in  FIG. 1 , includes a trolley  14 , to which wheels  12  and a main pillar  13  are respectively attached. More specifically, the wheels  12  are attached below four corners of the trolley  14 , and the main pillar  13  is attached above the trolley  14 . An incubator base  15  is then installed above the main pillar  13 . A flat container shaped mattress tray  16  is installed, as illustrated in  FIG. 1 ,  FIG. 2 ,  FIG. 4 , etc., onto the incubator base  15 . Moreover, a mattress  21  can be laid on the mattress tray  16  to enable an infant, such as a newborn baby, to be laid thereon. 
         [0026]    The mattress tray  16  that has been installed by being attached and fixed onto the incubator base  15  is respectively installed with the following, as illustrated in  FIG. 1  and  FIG. 2 , so as to form a substantially rectangular shape overall in plan view: an outer wall section (an outer baby guard)  23  normally generally configuring an outer wall section on a head side of an infant, or the rear side, adjacent to an ancillary equipment support column  22  installed to the main pillar  13 ; an outer wall section (an outer baby guard)  24  normally generally configuring an outer wall section on a leg side of an infant, or the front side; an outer wall section (an outer baby guard)  25  normally generally configuring an outer wall section on a left side of an infant; and an outer wall section (an outer baby guard)  26  normally generally configuring an outer wall section on a right side of an infant. A substantially cuboid shaped infant accommodation space  27  open an upper face is configured by the mattress tray  16  (in other words, the mattress  21 ) and the outer wall sections  23  to  26  that respectively may be substantially rectangular shaped, and may be substantially transparent. Note that the left side outer wall section  25  and the right side outer wall section  26  may have substantially the same dimensions as each other. The outer wall section  23  and the outer wall section  24 , which have lengths in their respective length directions (in other words, horizontal directions) that are slightly shorter than those of the outer wall sections  25 ,  26 , may have substantially the same dimensions as each other, except for a cutout shaped indentation  31  that is provided at the outer wall section  23  so as to extend from a substantially central portion of an upper edge of the outer wall section  23  to partway toward the lower edge thereof. The outer wall sections  23  to  26  may be respectively configured from sheets of plastic, such as polycarbonate resin or acrylic resin, which are substantially transparent overall. 
         [0027]    Each of the outer wall sections  24  to  26  is swingable to-and-fro between a substantially upstanding state (referred to below as “the upstanding state”) as illustrated in  FIG. 1  and  FIG. 2 , and a hanging state substantially downward illustrated in  FIG. 6  (referred to below as “the hanging state”; however, in  FIG. 6 , the outer wall section  26  is illustrated in the upstanding state), by swinging about swing support shafts  30  of swing support shaft members  29  arranged on the left and right sides, or the front and rear sides, in the vicinity of the lower edges of the outer wall sections  24  to  26  in the upstanding state illustrated in  FIG. 1 . The outer wall section  23  is also, in substantially the same manner as the outer wall section  24 , axially supported by swing support shafts (not illustrated in the drawings) on the left and right sides. Each of the swing support shafts  30  illustrated in  FIG. 2  and  FIG. 3A  to  FIG. 3C  can be shifted out from an engaged state with an attachment member  46  as illustrated in  FIG. 2  and  FIG. 3A , through an intermediate state as illustrated in  FIG. 3B , to a non-engaged state with the attachment member  46  as illustrated in  FIG. 3C , by a user manually performing a shift-out operation with an operation member  45 . Moreover, each of the swing support shafts  30  can be shifted back to the engaged state by a user manually performing a shift-back operation that is a reverse of the shift-out operation on the operation member  45  in the non-engaged state. 
         [0028]    At the outer periphery of the mattress tray  16 , as illustrated in  FIG. 6 , there are, for example, three inner wall sections  32 ,  33 ,  34  respectively arranged along the outer periphery of the mattress tray  16  so as to form a substantially U-shape overall in plan view. The inner wall sections  32  to  34  may respectively be configured from sheets of plastic, such as polycarbonate resin or acrylic resin, which are substantially transparent overall. The leg side inner wall section  32  may be attached to the mattress tray  16  so as to project substantially upward in the vicinity of a leg side end portion of the mattress tray  16 , so as to be detachable therefrom. The inner wall sections  33 ,  34  on the left side and the right side may be respectively attached to the mattress tray  16  so as to project substantially upward from the respective end portions on the left side and the right side of the mattress tray  16 , so as to be detachable therefrom. 
         [0029]    As illustrated in  FIG. 1 , etc., an appropriate number (three in this exemplary embodiment) of grommet members  42  having notches  41  for holding cables may be respectively attached to a portion of the outer wall section  23  adjacent to a lower end of the cutout shaped indentation  31  and to portions of the outer wall section  23  adjacent to the left and right ends of the indentation  31 . Elongated shaped members (not illustrated in the drawings) such as oxygen supply tubes may be held in the notches  41  in a state in which they pass through the grommet members  42 . An infrared heater  43  is installed at an upper end of the ancillary equipment support column  22 . Moreover, various measuring and control devices  44  for body temperature, SpO 2 , and the like are installed to the ancillary equipment support column  22  at positions substantially between the infrared heater  43  and the infant accommodation space  27  as viewed from the front. Specifically, configuration may be made such that a body temperature controller from out of the measuring and control devices  44  is input with a signal from a body temperature probe that measures the body temperature of the infant and displays the body temperature, so as to be able to control a heating temperature and the like of the infrared heater  43 . 
       2. Explanation of Inner Wall Section Structure 
       [0030]    The leg side inner wall section  32 , as illustrated in  FIG. 4  to  FIG. 6 , extends at the vicinity of the leg side end of the mattress tray  16  for substantially the entire length thereof. The left side inner wall section  33  extends at the vicinity of the left side end of the mattress tray  16  for substantially the entire length thereof. The right side inner wall section  34  extends at the vicinity of the right side end of the mattress tray  16  for substantially the entire length thereof. Moreover, due to the left and right ends of the inner wall section  32  being respectively separated from the front ends of the inner wall sections  33 ,  34 , the inner wall sections  32  to  34  are each respectively configured as a separate component. However, the left and right ends of the inner wall section  32  may be coupled to the front ends of the inner wall sections  33 ,  34 . In such cases, the inner wall sections  32  to  34  may be configured as a single frame body of substantially U-shape overall. The inner wall sections  32  to  34  are respectively equipped with attachment protrusions  35  that may each have a substantially L-shape projecting downward. 
         [0031]    Specifically, as illustrated in  FIG. 6 , three, for example, of the attachment protrusions  35  are arranged at each of the inner wall sections  32  to  34 , such as by integral molding, so as to project downward from outer faces thereof. Two, for example, attachment protrusions  36  are arranged at each of the inner wall sections  32  to  34 , such as by integral molding, so as to project downward from inner faces thereof. When the inner wall sections  32  to  34  are attached to side walls  37  of the mattress tray  16 , the attachment protrusions  35  and the attachment protrusions  36  respectively abut the outer faces and the inner faces of the side walls  37  of the mattress tray  16 . Thus, the side walls  37  are respectively interposed between the attachment protrusions  35  and  36 , such that the inner wall sections  32  to  34  are respectively fixed to the side walls  37  of the mattress tray  16  so as to be detachable therefrom. 
       3. Explanation of Configuration of Outer Wall Section Structure 
       [0032]    As illustrated in  FIG. 1 ,  FIG. 2 , and  FIG. 6 , the outer wall sections  23  to  26  each includes a wall section body  51 , and a support member  52  that is fixed by screws (not illustrated in the drawings) to a lower end of the respective wall section body  51 . Substantially the entire inner face of the lower end of the respective wall section body  51  is covered by a cover member  53 . At the vicinity of the two ends on the left and right, or front and rear, sides of the lower ends of the respective support members  52 , the outer wall sections  23  to  26  are attached to the attachment members  46  by a pair of the swing support shafts  30  so as to be capable of swinging. The attachment members  46  are respectively attached so as to be fixed to substantially the four corners of the mattress tray  16 . A left and right pair of shaft bearing guides  63   a,    63   b,  each configured by an indentation that is substantially elongated along the up-down direction, are formed at the respective inside face of each attachment member  46  on the left and right side of the attachment member  46 . Moreover, a bearing member  64  that may be of substantially cuboid shape is housed in each of the respective left and right pair of the shaft bearing guides  63   a,    63   b  so as to be capable of moving substantially up and down (in other words, substantially up-down movable). A through hole  65  or a bind hole, which have a substantially circular shape in vertical cross-section and extends in a substantially horizontal direction, is formed at each bearing member  64 . Moreover, a left and right pair of swing support shaft guides (not illustrated in the drawings), which is elongated in a substantially left-right direction and is shaped as substantially circular cylindrical indentations, is formed, such as by integral molding, at the left and right of the inside face of each support member  52 . 
         [0033]    A support shaft body  66  of each of the swing support shafts  30 , as illustrated in  FIG. 3A , etc., is formed so as to be elongated in a substantially left-right direction and is substantially circular cylindrical shaped. A protrusion  67  for latching a spring onto protrudes from a side end face of the support shaft body  66  on the opposite side to that of the swing support shaft  30 . Note that a spring (not illustrated in the drawings) engaged with one end of the protrusion  67  elastically biases the swing support shaft member  29  toward substantially the left in  FIG. 3A . The operation member  45  includes a knob  71 , which is a large, substantially rectangular shape or the like, for swinging and sliding the operation member  45 . A lock portion  72 , which is a small, substantially rectangular shape or the like, is contiguously provided to the knob  71 , such as by integral molding. Furthermore, a detachment stopper  73 , which is substantially circular shaped, is contiguously provided to the lock portion  72 , such as by integral molding. An engagement shaft  74 , which is an elongated substantially circular cylindrical shape, is contiguously provided to the detachment stopper  73 , such as by integral molding. On an inside face of the knob  71 , a rotation stopper  75 , which is a substantially trapezoidal shaped plate portion as viewed from the right in  FIG. 3A , is contiguously provided to the knob  71 , such as by integral molding. Moreover, a through hole  76 , which is a substantially keyhole shape, is formed at the support member  52 . The through hole  76  is configured including a first opening  77  of substantially circular shape, and a second opening  78  that is connected to the first opening  77  and of substantially rectangular shape. 
         [0034]    As illustrated in  FIG. 2 ,  FIG. 6 , etc., a pair of coupling members  54  that are respectively arranged at both substantially horizontal direction sides of the outer wall sections  23  to  26 , engage with a pair of engaged portions  55  respectively arranged at both substantially horizontal direction sides of the attachment members  46 , so as to be detachable therefrom. The lower ends of the respective wall section bodies  51  of the outer wall sections  23  to  26  each extend partway down the respective support member  52 , further downward than an intermediate position of the respective support member  52  in a substantially up-down direction. A portion of the respective wall section body  51  of the outer wall sections  23  to  26  that is adjacent to and substantially above the upper face of the support member  52  is configured as a thickened portion  56  having a substantially triangular shaped vertical cross-section, as illustrated in  FIG. 1 ,  FIG. 2 , etc. The thickened portions  56  are each arranged along substantially the entire length of the respective outer wall sections  23  to  26  in a substantially horizontal direction (in other words, in the substantially length direction thereof). Thus, in order to prevent dirty water, dust, or the like from entering between the lower end of the respective wall section body  51  and the support member  52 , and between the lower end of the wall section body  51  and the cover member  53 , one side  57  of a lower end face in the thickness direction of the thickened portion  56  abuts substantially the upper face of the support member  52 , and another side  58  of the lower end face abuts substantially the upper face of the cover member  53 . 
         [0035]    The outer wall section  23 , as illustrated in  FIG. 1 ,  FIG. 4  to  FIG. 6 , etc., is formed in substantially the same shape as the leg side outer wall section  24 , except for the outer wall section  23  having the cutout shaped indentation  31  and the grommet members  42 . The left side outer wall section  25  may be formed in substantially the same shape as the right side outer wall section  26 . In order to form escape sections for the four attachment members  46  at the two ends of the respective support members  52  of the outer wall sections  23  to  26 , cutouts  61  are respectively provided to portions corresponding to the attachment members  46 . The substantially horizontal direction lengths of the respective support members  52  are thereby formed slightly shorter than the substantially horizontal direction lengths of the respective wall section bodies  51  of the outer wall sections  23  to  26 . Cutouts  62  are also provided connected to the respective cutouts  61  in the vicinity of the lower ends at the respective left and right sides, or front and rear sides, of the wall section bodies  51  of the outer wall sections  23  to  26  when in the upstanding state. Moreover, as illustrated in  FIG. 1 ,  FIG. 2 ,  FIG. 4 , etc., in the upstanding state, the respective outer wall sections  23  to  26  curve in an arc so as to protrude slightly from the inside toward the outside as viewed in a substantially plan view. When respectively viewing the outer wall sections  23  to  26  in the upstanding state from a substantially plan view, a length direction central portion of the respective outer wall sections  23  to  26  has a substantially circular arc shape of comparatively large diameter (in other words, a substantially circular arc shape having a comparatively small amount of curvature), and the two length direction end portions of the respective outer wall sections  23  to  26  are each a substantially circular arc shape having a comparatively small diameter (in other words, a substantially circular arc shape having a comparatively large amount of curvature). The respective outer wall sections  23  to  26  are curved bodies having no substantially angular portions and continuing from one end portion from out of the two end portions, through the central portion, to the other end portion from out of the two end portions. 
         [0036]    A height difference H 1  (see  FIG. 6 ) in a substantially vertical direction between the upper end of the respective outer wall section  24  to  26  in the upstanding state and the upper end of the respective inner wall section  32  to  34  is approximately 84.5 mm in the illustrated exemplary embodiment. From a practical perspective, the height difference H 1  is generally preferably within a range of from 56.3 mm to 112.7 mm, is more preferably in a range of from 63.4 mm to 105.6 mm, and is most preferably in a range of from 67.6 mm to 101.4 mm. 
       4. Explanation of Operation of Outer Wall Section Structure 
       [0037]    When respectively swinging out the leg side outer wall section  24  and the left and right side outer wall sections  25 ,  26  from the upstanding state illustrated in  FIG. 1  and  FIG. 4 , etc., to the hanging state as illustrated for the outer wall sections  24 ,  25  in  FIG. 6 , first, locking of the respective outer wall sections  24  to  26  in a swung-back state by a lock device, in other words, the coupling members  54  and the engaged portions  55 , are disengaged. Specifically, when a user or the like manually lifts, for example, the leg side outer wall section  24  from out of the outer wall sections  24  to  26  substantially upward, then the bearing members  64  illustrated in  FIG. 2  shift inside the shaft bearing guides  63   a  of the attachment members  46  from being substantially at the bottom of the shaft bearing guides  63   a  to being substantially at the top thereof, and the coupling members  54  illustrated in  FIG. 2  are pulled out from the engaged portions  55 . Next, the user can swing the outer wall section  24  out from the upstanding state to the hanging state by swinging the outer wall section  24  about the respective left and right pair of swing support shafts  30 , as swing pivot points, toward substantially the opposite direction to the infant accommodation space  27 . Note that the out swing of the respective outer wall sections  24  to  26  can also be performed so as to be decelerated by a damping function of a damper (not illustrated in the drawings) capable of suppressing the swing speed of the out swing. Then, in order to swing the respective outer wall sections  24  to  26  in the hanging state back to the upstanding state, a user manually swing back the respective outer wall sections  24  to  26  about the pairs of swing support shafts  30  of the outer wall sections  24  to  26 . Specifically, when a user or the like, in a reverse of the operation when being swung out, manually swings back the outer wall section  24 , for example, out of the outer wall sections  24  to  26  with the respective pair of swing support shafts  30  acting as the pivot points, the coupling members  54  illustrated in  FIG. 2  engage with the engaged portions  55 , and the bearing members  64  illustrated in  FIG. 2  shift inside the shaft bearing guides  63   a  back from being substantially at the top of the shaft bearing guides  63   a  to being substantially at the bottom thereof. 
         [0038]    In order for a user or the like to manually remove the leg side outer wall section  24 , for example, out of the outer wall sections  23  to  26 , the user or the like continues the shift-out operation by manually manipulating the operation members  45  illustrated in  FIG. 3A  against the springs that is engaged with the respective spring engagement protrusions  67 . Then, due to this shift-out operation, each of the swing support shafts  30  shifts out, through the intermediate state illustrated in  FIG. 3B , to the non-engaged state with the attachment member  46  illustrated in  FIG. 3C . Thus the user or the like can manually remove the leg side outer wall section  24  from the left and right pair of attachment members  46  of the mattress tray  16  by pulling substantially upward. Moreover, the user or the like can re-attach the leg side outer wall section  24  to the attachment members  46  of the mattress tray  16 , as illustrated in  FIG. 2 , by performing an operation that is the reverse of the operation described above when pulling out the outer wall section  24 . 
         [0039]    The head side outer wall section  23 , the left side outer wall section  25 , and the right side outer wall section  26 , respectively illustrated in  FIG. 4  and  FIG. 6 , etc., each has a substantially similar, or substantially the same, attachment structure as the leg side outer wall section  24  and each may be respectively attached to the left and right pair, or the front and rear pair, of the attachment members  46  of the mattress tray  16 . Thus the head side outer wall section  23 , similarly to the leg side outer wall section  24  described above, can be removed from the respective left and right pair of attachment members  46  of the mattress tray  16 , and attached to the respective left and right pair of the attachment members  46 . Moreover, the left side outer wall section  25  and the right side outer wall section  26  each has a substantially similar, or substantially the same, attachment structure as the leg side outer wall section  24  and may be respectively attached to the front and rear pair of the attachment members  46  of the mattress tray  16 . 
         [0040]    The infant accommodation system  81  illustrated in  FIG. 5  is in a different state to the infant accommodation system  81  illustrated in  FIG. 4 . The infant accommodation system  81  illustrated in  FIG. 5  is in a state in which the head side outer wall section  23  and the leg side outer wall section  24  of the infant accommodation system  81  illustrated in  FIG. 4  have been exchanged with each other. In order to perform such an exchange, first, the head side outer wall section  23  and the leg side outer wall section  24  are removed by performing a removal operation substantially similarly to, or substantially the same as, the removal of the leg side outer wall section  24  described above. Then, the head side outer wall section  23  is attached as illustrated in  FIG. 5  to the left and right pair of attachment members  46  to which the leg side outer wall section  24  is attached in  FIG. 4 , and the leg side outer wall section  24  is attached as illustrated in  FIG. 5  to the left and right pair of attachment members  46  to which the head side outer wall section  23  is attached in  FIG. 4 . 
         [0041]    In the infant accommodation system  81 , the head side outer wall section  23  and the leg side outer wall section  24  can be exchanged with each other as illustrated in  FIG. 1 ,  FIG. 4 , and  FIG. 5 . In the infant accommodation system  81 , normally, as illustrated in  FIG. 1  and  FIG. 4 , the head side outer wall section  23  equipped with the cutout shaped indentation  31  and the grommet members  42  is adjacent to the ancillary equipment support column  22 . Moreover, in the normal operation state illustrated in  FIG. 1  and  FIG. 4 , the head of the infant is placed adjacent to the vicinity of inside the head side outer wall section  23 , and the legs (in particular the feet) of the infant are placed adjacent to the vicinity of inside the leg side outer wall section  24 . Hence, in the normal operation state, breathing tubes (not illustrated in the drawings) from resuscitation equipment (not illustrated in the drawings) can be extended, via the grommet members  42  of the head side outer wall section  23 , to the proximity of the mouth of the infant. However, in the normal operation state described above, when a doctor or nurse or the like is performing some kind of treatment or the like in the proximity of the head of the infant, due to the presence of the support column  22  and the like, the doctor or nurse or the like needs to perform treatment in the proximity of the head of the infant from the vicinity of the support column  22 . Note that in the normal operation state illustrated in  FIG. 1  and  FIG. 4 , the doctor or nurse or the like might conceivably perform treatment in the proximity of the head of the infant by switching over the head side of the infant and the leg side of the infant. However, in such cases, breathing tubes from the resuscitation equipment extend over a comparatively long gap from the grommet members  42  on the head side outer wall section  23  to the proximity of the head of the infant. The breathing tubes accordingly may become twisted or kinked by the infant&#39;s own body movements, making it difficult to achieve a good supply of breathing gas from the breathing tubes to the infant. 
         [0042]    In contrast thereto, in the event that the head side of the infant and the leg side of the infant are switched over and, as illustrated in  FIG. 5 , in cases in which the head side outer wall section  23  and the leg side outer wall section  24  are also exchanged with each other, the head side outer wall section  23  is positioned at a distance from the support column  22 , etc. This thereby enables the doctor or nurse or the like to approach the proximity of the head of the infant, which is disposed at a position distanced from the support column  22 , etc., substantially without consideration to the presence of the support column  22 , etc. In such cases, the breathing tubes may be arranged to pass in the vicinity of the outer peripheral face of the outer wall section  25 ,  26  on the left side or the right side and pass through the grommet members  42 . There is accordingly hardly any concern that the breathing tubes might be twisted or kinked by the infant&#39;s own body movements and the like. Moreover, the left side outer wall section  25  and the right side outer wall section  26  may also be exchanged, if the need arises. In cases in which at least one of the outer wall sections from out of the head side outer wall section  23 , the leg side outer wall section  24 , the left side outer wall section  25 , and the right side outer wall section  26  has been damaged, etc., then the at least one outer wall section  23  to  26  can be replaced with a spare outer wall section. 
         [0043]    Conceivably, as well as the head side outer wall section  23  equipped with the grommet members  42  and the cutout shaped indentation  31 , the leg side outer wall section  24  may also be similarly equipped with the grommet members  42  and the cutout shaped indentation  31 . However, in cases in which the outer wall sections  23 ,  24  are both respectively equipped with the grommet members  42  and the cutout shaped indentation  31 , sometimes there are cases in which the grommet members  42  and the cutout shaped indentation  31  that have been respectively provided at the leg side outer wall section  24  obstruct the doctor or nurse or the like, as well as there being a comparatively high cost from respectively providing two sets of the grommet members  42  and the cutout shaped indentation  31 . In contrast thereto, as illustrated in  FIG. 4  and  FIG. 5 , the cutout shaped indentation  31  and the grommet members  42  are only respectively provided to one out of the head side outer wall section  23  and the leg side outer wall section  24 . This thereby enables the four outer wall sections  23  to  26  to be provided at a comparatively low cost compared to cases in which the cutout shaped indentation  31  and the respective grommet members  42  are provided at both the head side outer wall section  23  and the leg side outer wall section  24 . 
         [0044]    Although detailed explanation has been given above of an exemplary embodiment of the present disclosure, the present invention is not limited to this exemplary embodiment, and various modifications and improvement are possible based on the scope as recited in the patent claims. 
         [0045]    For example, in the above-described exemplary embodiment, the present disclosure is applied to an open incubator. However, the present disclosure may be applied to not only an open incubator, but also to an open and close incubator. In such cases, a substantially box-lid shaped upper hood that is capable of moving substantially upward and downward may be provided to enable the infant accommodation space  27  to be selectably covered from above. Such an upper hood may be configured with an upper face section that may be substantially transparent, and with upper side walls that may be substantially transparent, are substantially rectangular shaped when viewed in plan view, and project substantially downward from the vicinity of the outer periphery of the upper face section. Configuration can also be made such that the incubator becomes an open incubator by opening the upper face of the infant accommodation space  27  when the upper hood is raised, and becomes a closed incubator by closing the upper face of the infant accommodation space  27  when the upper hood is lowered. 
         [0046]    Moreover, in the exemplary embodiment described above, the mattress tray  16  is configured in a substantially rectangular shape in plan view. However, the mattress tray  16  may be configured so as to be a substantially circular shape, a substantially elliptical shape, a substantially oval shape, or the like in plan view. The mattress tray  16  may also be configured as any substantially polygonal shape or the like other than a substantially rectangular shape in plan view.