Patent Publication Number: US-7584573-B2

Title: Glass fixing grommet

Description:
BACKGROUND OF THE INVENTION AND RELATED ART STATEMENT 
     The present invention relates to a glass fixing grommet to be used when a window glass is attached to a mount. 
     When a window glass is attached to a mount such as a window glass elevating mechanism, a glass fixing grommet has generally been used as disclosed in Japanese Patent No. 3285987. The glass fixing grommet includes a first supporting plate to be attached on one surface of a window glass peripheral edge portion having a hole and a second supporting plate to be attached on the other surface of the window glass peripheral edge portion to face the first supporting plate. The first supporting plate includes one of inner and outer cylinders to be fitted into each other. The second supporting plate includes the other of the inner and outer cylinders. 
     When the first supporting plate and the second supporting plate face each other and hold the glass peripheral edge portion, both cylinders fit into each other in the hole at the window glass peripheral edge portion. In the state that the cylinders are fitted together, a stopper is inserted into the cylinders in the fitted state for connecting the first and second supporting plates holding the window glass peripheral edge portion to the elevating mechanism (mount) to thereby stride over the first and second supporting plates. 
     The glass fixing grommet is attached to the window glass as described above. The glass fixing grommet is also connected to the elevating mechanism through the stopper. With this structure, the window glass moves vertically through an operation of the elevating mechanism to thereby open or close a window opening. 
     In the glass fixing grommet described above, a tapping screw is used as the stopper. The tapping screw is directly screwed in the second supporting plate. Accordingly, the tapping screw may be loosened and the glass attached to the elevating mechanism becomes unstable. Further, it is difficult to repeatedly use the glass fixing grommet. 
     In view of the problems described above, the present invention has been made, and an object of the invention is to provide a glass fixing grommet for stably holding a window glass attached to a mount for a long period and capable of repeated use. 
     Further objects and advantages of the invention will be apparent from the following description of the invention. 
     SUMMARY OF THE INVENTION 
     In order to attain the objects described above, according to a first aspect of the present invention, a glass fixing grommet includes a first supporting plate to be attached on one surface of a window glass peripheral edge portion having a hole and a second supporting plate to be attached on the other surface of the window glass peripheral edge portion to face the first supporting plate. The first supporting plate includes one of inner and outer cylinders to be fitted into each other. The second supporting plate includes the other of the inner and outer cylinders. When the first supporting plate and the second supporting plate face each other and hold the window glass peripheral edge portion therebetween, the cylinders are fitted into each other and inserted in the hole at the window glass peripheral edge portion. In the fitted state of the cylinders, a stopper for connecting the first and second supporting plates holding the window glass peripheral edge portion to a mount is inserted into the cylinders to thereby stride over the first and second supporting plates. 
     According to the first aspect of the present invention, the first supporting plate is provided with a bolt entering hole for inserting a bolt into the one cylinder. The second supporting plate is provided with a bolt exit for projecting the bolt outwardly through the other cylinder. The second supporting plate also holds a nut member for screwing the bolt, and a female screw hole of the nut member faces the bolt exit of the second supporting plate. 
     In the first aspect of the invention, the first supporting plate is provided with the bolt entering hole for inserting the bolt into the one cylinder. The second supporting plate is provided with the bolt exit for projecting the bolt outwardly through the other cylinder. The second supporting plate holds the nut member, and the female screw hole of the nut member faces the bolt exit. The bolt is used as a stopper for connecting the first and second supporting plates to the mount. That is, the bolt is screwed in the nut member through the bolt entering hole and the bolt exit. Accordingly, the first and second supporting plates hold the peripheral edge portion of the window glass, and the window glass is precisely attached to the mount. In this case, it is possible to strongly tighten the bolt into the nut member as compared with a case where a tapping screw is directly screwed in the second supporting plate. Therefore, with the glass fixing grommet of the present invention, it is possible to stably hold the window glass attached to the mount for a long period of time. Further, the bolt is detachable from the nut member, thereby making it possible to repeatedly use the glass fixing grommet. 
     According to a second aspect of the invention, the first and second supporting plates are rotatably connected with a connecting plate. When the first and second supporting plates face each other, it is possible to relatively rotate the first and second supporting plates with a space therebetween by a length of the connecting plate. Accordingly, when the first and second supporting plates are connected through the connecting plate, it is possible to provide a space between the first and second supporting plates for receiving the peripheral edge portion of the window glass. 
     Further, in the second aspect of the invention, the nut member is held by the second supporting plate so that a posture thereof can be changed with respect to the second supporting plate. When the first and second supporting plates hold the peripheral edge portion of the window glass, even if the first and second supporting plates are not aligned in parallel due to a thickness variation of the window glass, it is possible to change the posture of the nut member with respect to the second supporting plate portion, so that the bolt is smoothly screwed in the nut member while an axial center of the female screw hole of the nut member is aligned to an axial center of the bolt. As a result, when the first and second supporting plates hold the window glass therebetween, the glass fixing grommet is flexibly applied to a window glass with a different thickness. 
     According to a third aspect of the invention, the first and second supporting plates are provided with engaging pieces for engaging with each other in a state that one of the cylinders is fitted in the other of the cylinders to regulate a space between the first and second supporting plates. Accordingly, when the engaging pieces engage with each other, even if the axial center of the female screw hole of the nut member is inclined with respect to the axial center of the bolt, it is possible to change the posture of the nut member to a desired one from the fitting viewpoint through a pushing force of the bolt when the bolt is screwed in the nut member. Therefore, when the bolt is pressed against the female screw hole of the nut member, it is possible to smoothly screw the bolt in the nut member until completion. 
     According to a fourth aspect of the invention, the second supporting plate is formed of an inner plate and an outer plate facing the inner plate to form a receiving space therebetween. The nut member is disposed in the receiving space, and a deformable supporting member is disposed between the nut member and the outer plate. Accordingly, it is possible to precisely hold the nut member in the receiving space with the deformable supporting member. Even if the window glass has a thickness smaller than usual and the second and first supporting plates hold the window glass peripheral edge portion in a state that the second supporting plate is inclined toward the first supporting plate, the deformable supporting member is deformed by the pressing force of the bolt with respect to the nut member, so that the nut member is maintained in a desired posture and the bolt is precisely screwed in the nut member. 
     According to a fifth aspect of the invention, the nut member is formed of an annular plate portion and a cylindrical portion connected to a central hole peripheral edge portion of the annular plate portion and having a female screw on an inner peripheral surface thereof. The annular plate portion is disposed in the receiving space, and the cylindrical portion passes through the outer plate in a loosely fitted state. Accordingly, it is possible to precisely hold the nut member in the receiving space with the annular plate portion and the deformable supporting member. Further, when the bolt is screwed in the nut member, it is possible to maintain the nut member in the desired posture from the fitting viewpoint and secure a sufficient length for screwing the bolt in the nut member with the cylindrical portion. 
     According to a sixth aspect of the invention, an inserting port is formed between the inner plate and the outer plate for inserting the annular plate portion of the nut member into the receiving space. The outer plate is provided with a notch for allowing the cylindrical portion of the nut member to move when the annular plate portion is inserted into the receiving space. Accordingly, it is possible to slide and retain the annular plate portion of the nut member in the receiving space, so that the nut member can be easily received in the receiving space. 
     According to a seventh aspect of the invention, the engaging pieces of the first and second supporting plates engage each other in a state that the one cylinder is fitted in the other cylinder and the first and second supporting plates are aligned in parallel. In the engaging state, when the bolt is screwed in the nut member, the bolt pushes the nut member to align the first and second supporting plates in parallel, so that the bolt is smoothly screwed in the nut member. Even if the window glass has a thickness smaller than a distance between the first and second supporting plates (length of the connecting plate), the first and second supporting plates hold the window glass in a state that the second supporting plate is inclined toward the first supporting plate. The deformable supporting member is deformed by the pushing force of the bolt with respect to the nut member, so that the nut member is maintained in the desired posture and the bolt is precisely screwed in the nut member. 
     According to an eighth aspect of the invention, a part of a cylindrical wall of the outer cylinder is formed of a movable piece. An inner surface of the movable piece is inclined to enter an entering area of the inner cylinder toward a side of the supporting plate of the outer cylinder. Accordingly, it is possible to precisely insert the inner and outer cylinders in the hole of the window glass regardless of a variation in the hole when the inner and outer cylinders are fitted in, so that the glass fitting grommet is firmly integrated with the window glass. 
     According to a ninth aspect of the invention, a depressed portion is formed in at least one of the first and second supporting plates for allowing the hole peripheral edge portion of the window glass not to contact in a state that the window glass is held. Accordingly, when the first and second supporting plates hold the window glass, the force by the first and second supporting plates is not directly applied to the peripheral edge portion of the hole of the window glass, thereby preventing the window glass from being broken. 
     According to a tenth aspect of the invention, an elastic piece is provided to an inner side of at least one of the first and second supporting plates for abutting against the window glass. Accordingly, even if the window glass has a thickness smaller than a distance between the first and second supporting plates (length of the connecting plate) and the first and second supporting plates hold the window glass in a state that the second supporting plate is inclined toward the first supporting plate, it is possible to precisely hold the window glass with the elastic piece. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an explanatory view showing a grommet applied to an automobile door according to a first embodiment of the present invention; 
         FIG. 2  is a perspective view of the grommet according to the first embodiment; 
         FIG. 3  is a plan view showing the grommet according to the first embodiment; 
         FIG. 4  is a front view showing the grommet according to the first embodiment; 
         FIG. 5  is a bottom view showing the grommet according to the first embodiment; 
         FIG. 6  is a sectional view taken along line  6 - 6  in  FIG. 3 ; 
         FIG. 7  is an enlarged sectional view taken along line  7 - 7  in  FIG. 3 ; 
         FIG. 8  is an enlarged sectional view taken along line  8 - 8  in  FIG. 3 ; 
         FIG. 9  is a vertical sectional view showing a state that a carrying plate is attached to a window glass with the grommet according to the first embodiment; 
         FIG. 10  is an enlarged sectional view taken long line  10 - 10  in  FIG. 9 ; 
         FIG. 11  is a partial enlarged view of  FIG. 10 ; 
         FIG. 12  is a front view showing a nut member according to the first embodiment; 
         FIG. 13  is a plan view of the nut member shown in  FIG. 12 ; 
         FIG. 14  is an explanatory view for explaining a case that a window glass has a small thickness and the nut member is fixed to a second supporting plate portion; 
         FIG. 15  is an explanatory view for explaining the case that the window glass has a small thickness; 
         FIG. 16  is a plan view showing a grommet according to a second embodiment of the present invention; 
         FIG. 17  is a front view showing the grommet according to the second embodiment; 
         FIG. 18  is a bottom view showing the grommet according to the second embodiment; and 
         FIG. 19  is a vertical sectional view showing a state that a carrying plate is attached to a window glass with the grommet according to the second embodiment. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     Hereunder, embodiments of the present invention will be described with reference to the accompanying drawings. 
     In  FIG. 1 , reference numeral  1  denotes a side door of an automobile, and the side door  1  is provided with a widow glass  2 . Carrying plates or mounts  4  are attached to lower portions of the window glass  2  at two positions, i.e. front and rear positions thereof, through glass fixing grommets  3  according to an embodiment of the present invention. The carrying plates  4  are connected to an elevating table  5  constituting a portion of an elevating mechanism (hereinafter, reference numeral  5  is used to indicate the elevating mechanism). The window glass  2  moves in the vertical direction with the elevating mechanism  5 . 
     In the present embodiment, as shown in  FIG. 2 , the glass fixing grommet  3  includes a first supporting plate portion  6  as a first supporting plate, a connecting plate portion  7  as a connecting plate, and a second supporting plate portion  8  as a second supporting plate, as main components thereof. These portions are continuously integrated with a same width and are formed of a synthetic resin. The first supporting plate portion  6  and the connecting plate portion  7  are integrated to be rotatable with a thin connecting portion therebetween. The connecting plate portion  7  is integrated with the second supporting plate portion  8  in a state that a plate surface of the connecting plate portion  7  stands up with respect to a plate surface of the second supporting plate portion  8 . 
     As shown in  FIGS. 2 to 8 , the first supporting plate portion  6  is formed of a rectangular plate piece. A length of the first supporting plate portion,  6  in the longitudinal direction (horizontal direction, in  FIG. 3 ) is determined from a viewpoint for holding a lower portion of the window glass  2  as an article to be attached. The length is set to be greater than a distance from a hole (attaching hole)  12  formed in the lower portion of the widow glass  2  to a lower edge of the window glass  2  (refer to  FIG. 9 ). 
     The first supporting plate portion  6  is provided with a bent portion  9 , an outer cylinder (one cylinder)  10 , and an annular depressed portion  11  at an end thereof in a longitudinal direction. The bent portion  9  is connected to the first supporting plate portion  6  in a state that the bent portion  9  bends outwardly at a right angle at the end of the first supporting plate portion  6  in the longitudinal direction. The bent portion  9  holds an upper end surface of the carrying plate  4  when the grommet  3  is used. 
     The outer cylinder  10  with a circular cylindrical shape is integrated with the first supporting plate portion  6  and projects from an inner surface of the first supporting plate portion  6 . The outer cylinder  10  is provided at a position corresponding to the hole  12  at the lower portion of the widow glass  2  for attaching the grommet  3  to the window glass  2 . The outer cylinder  10  has a size to be fitted into the hole  12  at the lower portion of the window glass  2 . The outer cylinder  10  has a projecting end surface opened outwardly and a base end opened outwardly through a bolt entering hole  13  formed in the first supporting plate portion  6 . A bolt  16  for attaching the grommet  3  to the carrying plate  4  is inserted into the outer cylinder  10  from the bolt entering hole  13  (refer to  FIG. 9 ). 
     An engaging piece  14  and movable pieces  15  are formed as a part of a cylindrical wall of the outer cylinder  10 . The engaging piece  14  is positioned at one end of the first supporting plate portion  6  in the longitudinal direction, and a latching portion  14   a  is provided on an upper portion of the engaging piece  14  (refer to  FIG. 6 ). The movable pieces  15  are symmetrically disposed at both sides of the first supporting plate portion  6  in the width direction. The movable pieces  15  are integrally connected to other constituting portions of the outer cylinder  10  only at a projecting end of the outer cylinder  10 , and have free ends at the base end of the outer cylinder  10 , so that the movable pieces  15  can expand or contract. Each of the movable piece  15  has an inner surface inclined inwardly toward the first supporting plate portion  6  in the radial direction of the outer cylinder  10  (refer to  FIGS. 3 and 7 ). 
     The annular depressed portion  11  is formed of a thin portion of the first supporting plate portion  6  around the outer cylinder  10 . When the outer cylinder  10  is fitted in the hole  12  of the window glass  2 , the first supporting plate portion  6  is positioned away from the peripheral edge portion of the hole  12  with the annular depressed portion  11 , so that a force is not directly acted on the peripheral edge portion of the hole  12  from the first supporting plate portion  6  (refer to  FIG. 9 ). 
     As shown in  FIGS. 2 to 6  and  9 , the connecting plate portion  7  is integrally connected to the other side of the first supporting plate portion  6  in the longitudinal direction. The connecting plate portion  7  allows the first supporting plate portion  6  to face the second supporting plate portion  8  when the second supporting plate portion  8  rotates with respect to the first supporting plate portion  6 . With the connecting plate portion  7 , it is possible to provide a predetermined space between the first and second supporting plate portions  6  and  8  for receiving the lower portion of the window glass  2 . The space is suitably determined according to a thickness of the window glass  2 . 
     As shown in  FIGS. 2 ,  3  and  5 , the second supporting plate portion  8  is formed in a rectangular shape corresponding to the first supporting plate portion  6  to hold the lower portion of the window glass  2 . As shown in  FIGS. 2 to 6  and  9 , the second supporting plate portion  8  includes an inner plate portion  17  as an inner plate and an outer plate portion  18  as an outer plate facing the inner plate portion  17 . A receiving space  19  is formed between the inner and outer plate portions  17  and  18 . 
     The inner plate portion  17  of the second supporting plate portion  8  is connected to the connecting plate portion  7  at a substantially right angle at one end thereof in the longitudinal direction. As shown in  FIGS. 2 to 4 ,  6  and  9 , an inner surface of the inner plate portion  17  is provided with an inner cylinder (other cylinder)  20 , an engaging piece  21  and an annular depressed portion  22 . The inner cylinder  20  is positioned and has a size so that the inner cylinder  20  is fitted in the outer cylinder  10  of the first supporting plate portion  6  when the second supporting plate portion  8  rotates with respect to the first supporting plate portion  6  to face each other. When the inner cylinder  20  is fitted in the outer cylinder  10 , the inner cylinder  20  pushes the movable pieces  15  of the outer cylinder  10  to open (refer to  FIG. 10 ). 
     The inner cylinder  20  has at an opening at the projecting end thereof, and also has an opening at the base end thereof located in the receiving space  19  through the bolt exit  23  formed in the inner plate portion  17 . Accordingly, in a state that the inner cylinder  20  is fitted in the outer cylinder  10 , the bolt  16  can pass through the first supporting plate portion  6  and the inner plate portion  17  via the inner spaces of the inner cylinder  20  and the outer cylinder  10  to reach the receiving space  19 . 
     As shown in  FIGS. 2 to 4 ,  6  and  9 , the engaging piece  21  of the second supporting plate portion  8  is disposed at a position closer to the other end of the second supporting plate portion  8  in the longitudinal direction than the other portions of the inner cylinder  20 , and is formed of a part of the cylindrical wall of the inner cylinder  20 . The engaging piece  21  is also provided with a latching portion  21   a  at a forward end thereof. When the inner cylinder  20  is fitted in the outer cylinder  10  and the first and second supporting plate portions  6  and  8  face each other, the engaging pieces  14  and  21  (latching portions  14   a ,  21   a ) of the first and second supporting plate portions  6  and  8  engage with each other. In the present embodiment, in a state that the first and second supporting plate portions  6  and  8  face each other, especially, in a state that the first and second supporting plate portions  6  and  8  are positioned in parallel to each other, the engaging pieces  14  and  21  engage with each other. 
     As shown in  FIGS. 3 and 9 , the annular depressed portion  22  of the second supporting plate portion  8  is formed of a thin portion of the second supporting plate portion  8  around the inner cylinder  20 . When the inner cylinder  20  is fitted in the outer cylinder  10  in the hole  12  of the window glass  2 , the annular depressed portion  22  separates the second supporting plate portion  8  from the peripheral edge portion of the hole  12 , so that a force is not directly acted on the peripheral edge portion of the hole  12  from the second supporting plate portion  8 . In the present embodiment, in addition to the annular depressed portion  22 , a linear depressed portion  24  connected to the annular depressed portion  22  is formed in the inner surface of the second supporting plate portion  8 , and extends toward the other end of the second supporting plate portion  8  in the longitudinal direction. 
     The outer plate portion  18  of the second supporting plate portion  8  forms the receiving space  19  with a flat shape (bag shape) together with a side wall portion  27  and a bottom wall portion  28  between the inner plate portion  17  and the outer plate portion  18 . An inserting port  30  is formed at the other end of the outer plate portion  18  of the second supporting plate portion  8  as an opening of the receiving space  19 . The outer plate portion  18  is provided with a loose fitting hole  25  facing the bolt exit  23  and a notch  26  for opening a portion of the loose fitting hole  25  with respect to the other end of the outer plate portion  18  in the longitudinal direction. 
     As shown in  FIGS. 3 to 6  and  8  to  11 , the outer plate portion  18  includes a pair of supporting portions  29  integrally formed in the receiving space  19  as supporting members. The supporting portions  29  project from both sides of the outer plate portion  18  in the widthwise direction to sandwich the loose fitting hole  25  therebetween, and extend in the longitudinal direction of the outer plate portion  18 . Each of the supporting portions  29  includes a base portion  29   a  having a predetermined width and a forward end projection  29   b  having a smaller width on an upper surface of the base portion  29   a . The base portion  29   a  and the forward end projection  29   b  are integrated in a specific shape and formed of a synthetic resin same as that of the outer plate portion  18 , so that the base portion  29   a  and the forward end projection  29   b  can deform such as compressive deformation. 
     As shown in  FIGS. 5 ,  6 ,  8  to  10 , the receiving space  19  houses a nut member  31  therein. As shown in  FIGS. 12 and 13 , the nut member  31  is formed of an annular plate portion  32  and a cylindrical portion  33  connected to a peripheral edge portion of a central circular hole  32   a  of the annular plate portion  32 . These portions are integrally formed of a rigid material (synthetic resin, metal or the like) stronger than that of the supporting portions  29 . In the present embodiment, the annular plate portion  32  is formed in a plate piece with a square outer shape. The inner plate portion  17  and the supporting portions  29  hold the annular plate portion  32  in the receiving space  19  in a state that a side wall portion  27  and a bottom wall portion  28  restrict rotation of the annular plate portion  32  (rotation locked state). 
     When the annular plate portion  32  is set, the annular plate portion  32  is pushed into a space between the inner plate portion  17  and the pair of the supporting portions  29  through the inserting port  30 . At this time, the supporting portions  29  are compressed and press the annular plate portion  32  against the inner plate portion  17  with an elastic force thereof, so that the annular plate portion  32  is precisely held in the receiving space  19 . 
     The cylindrical portion  33  includes a female screw on an inner peripheral surface thereof over an entire length in the axis direction, so that the inner portion of the cylindrical portion  33  constitutes a female screw hole  34 . Accordingly, when the bolt  16  is screwed in the female screw hole  34 , it is possible to obtain a sufficient screwing-in length with respect to the bolt  16 . When a central circular hole  32   a  of the annular plate portion  32  is set to face the bolt exit  23  of the inner plate portion  17 , the cylindrical portion  33  is loosely fitted in the loose fitting hole  25 . When the annular plate portion  32  is inserted into the receiving space, the cylindrical portion  33  is fitted in the loose fitting hole  25  through the notch  26  without interference. 
     A process of attaching the window glass  2  to the carrying plates  4  using the glass fixing grommets  3  will be described next. First, the fixing grommets  3  are temporarily attached to a lower portion of the window glass  2 . In the temporal fixing, the first and second supporting plate portions hold the lower portion of the window glass  2  from the lower side thereof, and the outer cylinder  10  and the inner cylinder  20  are pushed in the hole  12  of the window glass  2  and fitted into each other. When the inner cylinder  20  is fitted into the outer cylinder  10 , the first and second supporting plate portions  6  and  8  become in a parallel state, and the engaging pieces  14  and  21  of the first and second supporting plate portions  6  and  8  engage with each other. Accordingly, with the engagement, the first and second supporting plate portions  6  and  8  are not separated (opened), thereby temporarily fixing the grommets  3  to the lower portion of the window glass  2  (refer to  FIG. 9 ). 
     As shown in  FIG. 10 , when the inner cylinder  20  is fitted into the outer cylinder  10 , a pair of the movable pieces  15  is pushed to open outwardly in a radial direction of the outer cylinder  10 , and abuts against an inner peripheral surface of the hole  12  of the window glass  2 . Accordingly, even if the hole  12  of the window glass  2  has a variation in size, the axial centers of the inner and outer cylinders  20  and  10  are positioned at the center of the hole  12 . 
     After the bolt  16  is inserted into the insertion hole  35  of the carrying plate  4  as a mount, the bolt  16  is further inserted into the inner and outer cylinders  20  and  10  in the fitted state through the bolt entering hole  13 . Then, a forward end portion of the bolt  16  abuts against the female screw hole  34  of the nut member  31  through the bolt exit  23 , and the bolt  16  is screwed in the female screw hole  34 . 
     In this case, when the bolt  16  is screwed in the female screw hole  34  of the nut member  31 , the bolt  16  pushes the nut member  31  in a direction that the nut member  31  is separated from the first supporting plate portion  6 . However, the engaging pieces  14  and  21  of the first and second supporting plate portions  6  and  8  engage with each other and receive the pushing force. Accordingly, the axial center of the bolt  16  coincides with the axial center of the female screw hole  34 , so that the bolt  16  is smoothly screwed in the nut member  31 . 
     When the bolt  16  is screwed in the nut member  31 , the second supporting plate portion  8  approaches the window glass  2  as the nut member  31  moves. Accordingly, the first and second supporting plate portions  6  and  8  hold the lower portion of the window glass  2 , and the lower portion of the window glass  2  is attached to the carrying plates  4 . This operation is completed when the tightening force of the bolt  16  reaches a predetermined level. 
     When the bolt  16  is screwed in the nut member  31 , the bolt  16  is inserted into the inner and outer cylinders  20  and  10  in the fitted state, and the bolt  16  restricts the inner cylinder  20  to deform inwardly in a radial direction. Accordingly, the movable pieces  15  of the outer cylinder  10  are pushed outwardly in the radial direction of the inner cylinder  20 , and held in a state abutting against the inner periphery of the hole  12  of the window glass  2 , so that the grommets  3  are firmly fixed to the window glass  2 . 
     When the grommet  3  is used, the bolt  16  is screwed in the nut member  31  provided in the grommet  3 . Accordingly, it is possible to increase the tightening force as compared with a case where a tapping screw is directly screwed in the second supporting plate portion or the like. As a result, the grommets  3  are stably attached to the carrying plates  4  without loosening for a long period of time. Further, the nut member  31  is provided in the grommet  3 , and the bolt  16  is screwed in the nut member  31 . Accordingly, it is possible to reuse the grommet  3  as the bolt  16  is detachable from the nut member  31 . 
     In the grommet  3 , when the window glass  2  has a specific thickness, the first and second supporting plate portions  6  and  8  become a parallel state when the first and second supporting plate portions  6  and  8  hold the window glass  2 . Further, the grommet  3  of the invention is applicable to a case that the window glass  2  has a thickness smaller than the specific thickness due to a variation. That is, in such a case (the window glass  2  has a thickness smaller than the specific thickness), when the second supporting plate portion  8  can bend in a certain degree, even if the nut member  31  is fixed to the second supporting plate portion  8 , the first and second supporting plate portions  6  and  8  can hold the lower portion of the window glass  2  with the bolt  16  screwed in the nut member  31 . However, in a case that the second supporting plate portion  8  does not bend and the nut member  31  is fixed to the second supporting plate portion  8 , when the bolt  16  is screwed in the nut member  31  and the first and second supporting plate portions  6  and  8  hold the lower portion of the window glass  2 , a portion of the second supporting plate portion  8  at a position further away from a rotational center thereof has a longer moving path as shown in  FIG. 14 . Accordingly, when the second supporting plate portion  8  rotates, the second supporting plate portion  8  is inclined toward the first supporting plate portion  6 . As a result, an axial center L 1  of the female screw hole  34  of the nut member  31  is inclined with respect to an axial center L 2  of the bolt  16 , thereby making it difficult to screw the bolt  16  in the nut member  31 . 
     In the grommet  3  of the invention, the inner plate portion  17  and the supporting portions  29  hold the annular plate portion  32  of the nut member  31 . When the second supporting plate portion  8  rotates toward the window glass  2  and the bolt  16  is screwed in the nut member  31 , as shown in  FIG. 15 , the annular plate portion  32  presses a portion of the second supporting plate portion  8  with a shorter moving path (lower portion of the second supporting plate portion  8  shown in  FIG. 15 ). The annular plate portion  32  does not press a portion of the second supporting plate portion  8  with a longer moving path (upper portion of the second supporting plate portion  8  in  FIG. 15 ). Accordingly, in the case that the second supporting plate portion  8  does not deform (high rigidity), when the grommets  3  are used for fixing the window glass  2  with a thickness thinner than the specific thickness, it is possible to precisely hold the lower portion of the window glass  2  with the first and second supporting plate portions  6  and  8  when the both  16  is screwed in the nut member  31 . 
       FIGS. 16 to 19  are views showing a grommet according to another embodiment. In the present embodiment, elements same as those in the aforementioned embodiment are designated by the same reference numerals and explanations thereof are omitted. 
     In the present embodiment, an inner plate portion  17  is provided with a plurality of elastic pieces  40  projecting inwardly. The elastic pieces  40  deform to provide a spring function and four elastic pieces having a rectangular shape are disposed in the vicinity of corners of the inner plate portion  17 . A pair of holding rails  41  with a space therebetween is provided on an outer surface of the inner plate portion  17  in the longitudinal direction thereof, and the annular plate portion  32  of the nut member  31  is slidably disposed in the holding rails  41 . 
     In the present embodiment, one side wall portion  27  is provided for supporting the outer plate portion  18  in a one-side state. The outer plate portion  18  includes a positioning hole  42  for positioning a cylindrical portion  33 , and the positioning hole  42  has an opening opened outwardly through the notch  26  at one side of the outer plate portion  18  in the widthwise direction. Further, the outer plate portion  18  includes a movable regulating piece  43  in the vicinity of the notch  26 . When the cylindrical portion  33  enters, the regulating piece  43  bends, and once the cylindrical portion  33  is fitted in the positioning hole  42 , the regulating piece  43  restrict the cylindrical portion  33  not to move outwardly toward one side in the widthwise direction. 
     In the embodiment, when the annular plate portion  32  of the nut member  31  is fitted in the holding rails  41 , and the cylindrical portion  33  is inserted into the notch portion  26  to slide toward the other side of the inner plate portion  17  in the widthwise direction, the female screw hole  34  of the nut member  31  is properly positioned with respect to the bolt exit  23  of the inner plate portion  17 , and the inner plate portion  17  properly holds the nut member  31 . 
     When the grommet  3  described above is used for fixing the window glass  2 , it is possible to obtain advantages same as those in the embodiment described previously. When the window glass  2  has a thickness smaller than the intended thickness due to a variation, a type of glass or the like, the elastic pieces  40  abut against the window glass  2  to thereby prevent wobbling, and the first and second supporting plate portions  6  and  8  hold the lower portion of the window glass  2  with an adequate holding force. 
     Incidentally, the invention is not limited to the embodiments described above, and includes other modifications having practical preference and advantages. 
     The disclosure of Japanese Patent Application No. 2003-330443, filed on Sep. 22, 2003, is incorporated in the application. 
     While the invention has been explained with reference to the specific embodiments of the invention, the explanation is illustrative and the invention is limited only by the appended claims.