JP5860274B2 - Mat fixing device - Google Patents

Description

  The present invention relates to a mat fixing device for fixing a mat to a carpet.

  A carpet is laid on the floor of the vehicle, and a mat is further attached to a portion on which a driver's or passenger's foot gets. The mat is fixed so as not to move carelessly with respect to the carpet. For example, when mud or sand adheres to the mat, the mat can be removed from the carpet and cleaned.

  As a method for detachably attaching a mat to a carpet, the following Patent Document 1 discloses a first clip fixed to the carpet, a second clip attached to the first clip, and a mat fixed to the mat. A fixing tool and a mounting knob for connecting the second clip to the mat fixing tool are provided, and the first clip is provided with a C-shaped fixing portion, standing from the fixing portion, and provided with an elastic locking piece. The second clip has a flange, a support portion formed on the upper surface thereof, and a hole formed on the lower surface of the flange and engaged with the elastic locking piece. There is described a fixing device having a cylindrical connecting portion, and the attachment knob has a rectangular knob portion and a locking leg suspended from the knob portion. Moreover, the attachment knob is rotatably supported by inserting the locking leg of the attachment knob into the hole of the support portion of the second clip.

  When the mat is attached to the carpet using the fixing device, the following work is performed. That is, align the longitudinal direction of the knob part of the mounting knob in the rectangular shape with the longitudinal direction of the elliptical hole of the mat fixture fixed to the mat, and project the knob part from the elliptical hole. By rotating 90 degrees, the knob portion engages with the elliptical hole, and the second clip is fixed to the mat fixture.

  Then, by positioning and pushing the connecting portion of the second clip into the connecting portion of the first clip fixed to the carpet, the elastic locking piece of the connecting portion of the first clip becomes the hole of the connecting portion of the second clip. The mating parts are coupled to each other so that the mat is attached to the carpet.

  On the other hand, the mat can be removed from the carpet by pulling up the mat with respect to the carpet and pulling out the connecting portion of the first clip from the connecting portion of the second clip.

JP 2010-180929 A

  In the fixing device described in Patent Document 1, when an occupant's toe hits the knob part of the mounting knob or an object such as an umbrella hits the knob part, an unexpected external force acts on the knob part. May turn around. Then, when the longitudinal direction of the rotated knob portion is aligned with the longitudinal direction of the elliptic hole of the mat fixture, the knob portion may be detached from the elliptic hole of the mat fixture.

  Accordingly, an object of the present invention is to provide a mat fixing device that can hold a mat so that the mat does not come off the carpet even when the knob rotates.

In order to achieve the above object, a mat fixing device of the present invention includes a main body portion attached to a carpet side and a grommet attached to the mat side, and a rotation knob provided in the main body portion is provided in the grommet. It is configured to connect the carpet and the mat by inserting and rotating the mounting hole and rotating the carpet, and the main body portion includes a fixing portion to the carpet and a supporting portion connected to the fixing portion. And a long hole provided in the support part, and the rotary knob includes a shaft part inserted through the long hole, a knob part provided at a front side end of the shaft part, and the shaft part. A retaining portion provided at a rear end of the shaft, and the elongated hole is provided with a constricted portion that can pass through the shaft portion in a press-fitted state in the middle, and the mounting hole of the grommet is provided on the rotary knob. Is located on one end side of the long hole. When the rotation knob is at a predetermined rotation angle in the state, the knob portion can be inserted, and when the rotation knob is set to an angle different from the rotation angle, or the shaft portion of the rotation knob is the long hole. When the knob is moved to the other end side, the knob portion cannot be inserted and is prevented from coming off, and the shaft portion of the rotary knob is positioned at one end side of the elongated hole in the vicinity of the mounting hole of the grommet. When the rotary knob is rotated in this state, one end of the knob portion comes into contact, the shaft portion is slid to the other end side of the elongated hole , and the longitudinal direction of the knob portion is the longitudinal direction of the mounting hole. A rotation restricting portion for stopping at the intersecting position is provided.

  In the mat fixing device of the present invention, the long hole has a Dalma hole shape in which two circular holes are partially overlapped and a constricted part is formed in the middle, and the outer diameter of the shaft part of the rotary knob Is preferably formed to be smaller than the inner diameter of each circular hole and larger than the gap between the constricted portions so that the shaft portion passes through the constricted portion in a press-fit state.

  In the mat fixing device of the present invention, it is preferable that at least one side wall portion of the constricted portion of the elongated hole bendable in an outer diameter direction when the shaft portion passes through the constricted portion.

In the mat fixing device of the present invention, when the rotation restricting portion of the grommet is rotated by inserting the knob portion into the mounting hole, the longitudinal direction of the knob portion is set with respect to the longitudinal direction of the mounting hole. It is preferable to be formed so as to stop at an orthogonal angle.

  According to the present invention, when the rotary knob is set to a predetermined angle with the shaft portion of the rotary knob positioned on one end side of the long hole, the knob portion can be inserted into the mounting hole of the grommet. When the knob portion is inserted into the mounting hole and then the rotary knob is rotated, one end of the knob portion comes into contact with the rotation regulating portion of the grommet, and the shaft portion of the rotary knob slides to the other end side of the elongated hole, and the knob portion Stops at the position where it crosses the mounting hole. Therefore, the knob portion engages with the attachment hole and is prevented from coming off, and the mat can be fixed to the carpet.

  And even if the knob part rotates during use and becomes an angle that does not intersect the attachment hole, the knob part can pass through the attachment hole because the shaft part of the rotary knob is located on the other end side of the long hole. The mat will not come off. Also, when you want to remove the mat, operate the knob part to move the shaft part of the rotary knob to one end side of the long hole, and in that state, set the knob part to the rotation position that aligns with the mounting hole. Can be removed from the mounting hole to remove the mat.

  In this way, simply by inserting the knob part into the mounting hole and rotating it, the shaft part of the rotary knob can be moved to the other end side of the long hole and the knob part can be at an angle intersecting the mounting hole, so it is easy The mat can be securely fixed with a simple operation.

1 is an exploded perspective view showing an embodiment of a mat fixing device according to the present invention. It is a top view of the main-body part which comprises the same mat fixing device. It is a perspective view at the time of seeing from the back surface side of the same mat fixing device. It is the usage method at the time of fixing a mat to a carpet using the mat fixing device, and shows the first step, where (a) is a plan view and (b) is a cross-sectional view. The 2nd process of the usage method of the same mat fixing device is shown, (a) is a top view and (b) is a sectional view. The 3rd process of the usage method of the same mat fixing device is shown, (a) is a top view and (b) is a sectional view. The 4th process of the usage method of the same mat fixing device is shown, (a) is a top view and (b) is a sectional view. The 5th process of the usage method of the same mat fixing device is shown, (a) is a top view and (b) is a sectional view.

  Hereinafter, an embodiment of a mat fixing device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the mat fixing device 10 in this embodiment is attached to the main body 20 attached to the carpet 1, a rotary knob 50 rotatably attached to the main body 20, the mat 5, A grommet 60 in which an attachment hole 75 (see FIGS. 5A and 5B) for attaching the main body 20 is formed on the inner periphery thereof. The carpet 1 is formed with rectangular fixing holes 2 and 3 at a predetermined interval, and the mat 5 is formed with a grommet mounting hole 7 having a long hole shape with rounded ends in the longitudinal direction. ing.

  The main body portion 20 includes a fixing portion 30 fixed to the carpet 1, and a support portion 40 that is connected to the fixing portion 30 and has a long hole 45 (see FIG. 2). The rotary knob 50 is rotatably supported by the long hole 45.

  As shown in FIG. 1, the rotary knob 50 in this embodiment is connected to a prismatic shaft portion 51 inserted through the long hole 45, and a front side end portion of the shaft portion 51. The knob portion 53 is connected to the back side end portion of the shaft portion 51, and the retaining portion 55 is arranged on the back side of the long hole 45. Each of the knob portion 53 and the retaining portion 55 has a long shape extending long in one direction. Further, a circular portion 51 a having a circular diameter is provided at the front end portion of the shaft portion 51. The “front side end” of the shaft portion 51 means one axial end portion of the shaft portion 51 located on the front side of the long hole 45, and the “back side end portion” is located on the back side of the long hole 45. Means the other axial end.

  Referring to FIGS. 1 to 3, the fixing portion 30 of the main body portion 20 will be described. The fixing portion 30 has a long plate-like plate body 31 that comes into contact with the surface of the carpet 1. A rib 34 is provided upright at one end in the longitudinal direction on the back surface of the plate 31. The rib 34 can be opened and closed with respect to the plate 31 via a thin hinge 34a. A long plate-like sandwiching plate 35 is connected. An engagement wall 32 is erected at a position slightly closer to the other end in the longitudinal direction than the rib 34, and an engagement wall 33 is erected at the other end in the longitudinal direction of the plate body 31. .

  Further, the engaging claws 36 and 37 that engage with the engaging walls 32 and 33 protrude from the inner surface side of the holding plate 35 near the longitudinal base end and the longitudinal tip end, respectively. It is installed. Further, from the position adjacent to the engagement claw 37 on the inner surface of the sandwiching plate 35, it is arranged on the back side of the engagement wall 33 and maintains the engagement state between the engagement wall 32 and the engagement claw 36. A holding piece 38 is erected.

  The support portion 40 connected to the fixing portion 30 includes a grommet insertion portion 41 to be inserted into the grommet inner circumference, and a top surface of the grommet insertion portion 41 that protrudes in a stepped manner at a position near one end in the longitudinal direction. And a mounting hole insertion portion 43 that is inserted into the mounting hole 75 on the inner periphery of the grommet.

  The grommet insertion portion 41 is formed by a peripheral wall 41a erected from the upper surface of the plate body 31 and a ceiling wall 41b that forms the upper end surface of the peripheral wall 41a. The mounting hole insertion portion 43 includes a long frame-shaped peripheral wall 43a whose both ends in the longitudinal direction are rounded in a semi-cylindrical shape, and a ceiling wall 43b that forms the upper end surface of the peripheral wall 43a.

  A long hole 45 is provided in the ceiling wall 43b of the mounting hole insertion portion 43 to support the shaft portion 51 of the rotary knob 50 so as to be rotatable and slidable. As shown in FIG. 2, the long hole 45 of this embodiment has two circular holes with the same inner diameter, a circular hole 45a disposed at one end in the longitudinal direction and a circular hole 45b disposed at the other end in the longitudinal direction. 45a and 45b are partially overlapped and formed into a Dharma hole shape with a constricted portion 45c provided in the middle.

  In the case of this embodiment, the inner diameter R of each circular hole 45a, 45b is formed larger than the outer diameter D of the circular part 51a of the shaft part 51, and the constricted part 45c is larger than the outer diameter D of the circular part 51a. The gap C is formed small (R> D> C). Therefore, the circular part 51a of the shaft part 51 is rotatable in the respective circular holes 45a and 45b, and when the shaft part 51 moves between the circular holes 45a and 45b, the circular part 51a press-fits the constricted part 45c. It is supposed to pass in the state.

  In addition, since the ceiling wall 43b is not disposed on both side portions on the long side of the peripheral wall 43a of the mounting hole insertion portion 43 that are aligned with the constricted portion 45c, only the thin peripheral wall 43a is provided. The circular portion 51a is configured to bend in the outer diameter direction when passing through the constricted portion 45c in a press-fit state. In addition, a slit, a notch, or the like may be provided on a side portion of the peripheral wall 43a aligned with the constricted portion 45c so that the side portion of the peripheral wall 43a can be bent, or only one side on the long side of the peripheral wall 43a. May be deflectable.

  As shown in FIG. 3, the back surface of the ceiling wall 41b of the grommet insertion portion 41 is formed with a recess 31a in which the retaining portion 55 of the rotary knob 50 is disposed (FIGS. 3 and 4B). reference). In addition, a pair of knob engaging ribs 47 and 47 are erected on the peripheral edge of the long hole 45 in the recess 31a so as to come out when the rotary knob 50 rotates a predetermined angle. The stopper 55 is engaged with the knob engaging ribs 47 and 47 so as to be retained. Also, elastic claws 48, 48 that can be bent are provided between the pair of knob engaging ribs 47, 47 on the long side edge of the long hole 45, and FIG. 3 and FIG. ), When the retaining portion 55 of the rotary knob 50 is inserted into the back side of the long hole 45, it enters between the circular portion 51a of the shaft portion 51 and the retaining portion 55, and the main body portion 20 On the other hand, the rotary knob 50 is held so as not to come off.

  Next, the grommet 60 attached to the mat 5 will be described. As shown in FIG. 1, this grommet 60 is disposed on the surface side of the mat 5 and on the back surface side of the mat 5, and is attached to the substrate 70 and sandwiches the mat 5. 80.

  The base body 70 is inserted into the grommet mounting hole 7 of the mat 5 and conforms to the grommet insertion part 41 of the support part 40 of the main body part 20 to form a long frame shape whose both ends are rounded into a semi-cylindrical shape. It has a cylindrical portion 71 and a flange portion 72 that spreads in an umbrella shape from the outer periphery of the upper end of the cylindrical portion 71 and engages with the front side periphery of the grommet mounting hole 7. In addition, a plurality of engaging portions 73 including a plurality of convex portions protruding in a step shape along the axial direction are provided on the outer periphery of the cylindrical portion 71 at a predetermined interval in the circumferential direction.

  As shown in FIGS. 1 and 5, a knob engaging wall 74 protruding in a step shape is formed in the middle of the inner periphery of the cylindrical portion 71. The lower surface of the knob engaging wall 74 is at a position higher than the lower end of the cylindrical portion 71, and the grommet insertion portion 41 of the main body portion 20 is inserted into the inner periphery of the lower end portion of the cylindrical portion 71. On the other hand, the grommet 60 is prevented from rotating.

  On the other hand, the knob engaging wall 74 has a long hole shape in which both ends in the longitudinal direction are rounded so as to fit the mounting hole insertion portion 43 of the main body portion 20 and the knob portion 53 of the rotary knob 50. A mounting hole 75 through which the hole insertion portion 43 and the knob portion 53 can be inserted is formed. As shown in FIG. 6A, the attachment hole 75 is located near one end in the longitudinal direction of the knob engaging wall 74, and is provided in the attachment hole insertion portion 43 at the center of the attachment hole 75. A circular hole 45a on one end in the longitudinal direction of the long hole 45 is formed so as to be aligned.

  Therefore, in a state where the shaft portion 51 of the rotary knob 50 is disposed in the circular hole 45a of the elongated hole 45, the knob portion 53 is rotated so that the longitudinal direction of the knob portion 53 and the longitudinal direction of the mounting hole 75 coincide. When this is done, the knob 53 can be inserted through the mounting hole 75 (see FIG. 5). On the other hand, when the knob portion 53 rotates so that the longitudinal direction of the knob portion 53 intersects the longitudinal direction of the mounting hole 75 and when the shaft portion 51 moves to the circular hole 45b of the elongated hole 45, the knob portion 53 becomes impossible to pass through the mounting hole 75, and the knob portion 53 engages with the front peripheral edge portion of the mounting hole 75 of the knob engaging wall 74, so that the main body portion 20 is prevented from coming off from the grommet 60. (See FIGS. 6 to 8).

  In addition, a rotation restricting portion 78 is provided on the front surface side of the knob engaging wall 74 and on the peripheral edge portion on one long side of one end portion in the longitudinal direction of the mounting hole 75. As shown in FIG. 5A, the rotation restricting portion 78 in this embodiment is parallel to the parallel surface 78 a parallel to the longitudinal direction of the mounting hole 75, and the orthogonal surface 78 b orthogonal to the longitudinal direction of the mounting hole 75. It is comprised from the circular-arc-shaped corner | angular part 78c provided between the surface 78a and the orthogonal surface 78b.

  The rotation restricting portion 78 comes into contact with the knob portion 53 when the rotation knob 50 is rotated in a state where the shaft portion 51 of the rotation knob 50 is disposed in the circular hole 45a on one end side in the longitudinal direction of the long hole 45. The shaft portion 51 is passed through the constricted portion 45c of the long hole 45 and moved to the circular hole 45b on the other end side (see FIG. 7), and further rotation of the knob portion 53 is restricted, and the knob portion It stops at a position where the longitudinal direction of 53 intersects the longitudinal direction of the mounting hole 75, that is, a position substantially orthogonal in this embodiment, and serves to prevent the mounting hole 75 from coming off.

  The rotation restricting portion 78 in this embodiment is provided on one long side peripheral edge of the longitudinal end of the mounting hole 75, but the other long side of the longitudinal end of the mounting hole 75. It may be provided at the side peripheral edge, and while allowing the rotation knob 50 to rotate in a predetermined direction, the shaft 51 can be moved to the circular hole 45b on the other end side of the long hole 45 by contacting the knob 53. Anything is possible.

  The lid body 80 attached to the base body 70 is externally mounted on the cylindrical portion 71 of the base body 70, and has a frame-shaped cylindrical portion 81 inserted into the grommet mounting hole 7 of the mat 5, and a base end outer periphery of the cylindrical portion 81. And a flange portion 82 that extends in the shape of an umbrella and engages with the rear peripheral edge of the grommet mounting hole 7 of the mat 5. Further, on the inner periphery of the cylindrical portion 81, a plurality of engaging claws 83 that are engaged in a stepwise manner with a stepped engaging portion 73 provided on the base body 70 are projected at equal intervals in the circumferential direction. It is installed.

  Next, the usage method and the effect of the mat fixing device 10 according to the present invention having the above structure will be described.

  First, the rotary knob 50 is assembled to the main body 20. That is, in a state where the retaining portion 55 of the rotary knob 50 is aligned with the long hole 45 of the main body portion 20, the rotary knob 50 is pushed into the main body portion 20, and the retaining portion 55 is inserted from the back side of the long hole 45. The elastic claws 48 and 48 are disposed between the circular portion 51a of the shaft portion 51 and the retaining portion 55 (see FIGS. 3 and 4B).

  At the same time, the shaft 51 of the rotary knob 50 is slid toward the circular hole 45 a of the elongated hole 45, so that the circular 51 a of the shaft 51 is aligned with the constricted portion 45 c of the peripheral wall 43 a of the mounting hole insertion portion 43. It passes through the constricted part 45c in a press-fitted state while bending the portion to be bent in the outer diameter direction, and is arranged in the circular hole 45a of the long hole 45. In this way, the rotary knob 50 is rotatably attached to the main body 20 and assembled (see FIG. 4).

  Next, the clamping plate 35 and the engaging wall 32 of the main body 20 are inserted into the fixing hole 2 of the carpet 1 and bent at the thin hinge 34a, and the back surface of the plate 31 is inserted into the fixing hole 3 from the back side of the carpet 1. The engaging wall 33 is inserted. In this state, the clamping plate 35 is closed with respect to the plate body 31, and the engagement claws 36 and 37 are engaged with the engagement walls 32 and 33, so that the front and back surfaces of the carpet 1 are placed on the plate body 31 and the clamping plate 35. Thus, the main body 20 can be attached to the carpet 1 (see FIG. 4B).

  Further, the grommet 60 is positioned and attached to the mat 5. That is, the cylindrical portion 71 of the base body 70 is aligned and inserted from the front side of the grommet mounting hole 7 of the mat 5, the flange portion 72 is engaged with the front side periphery of the grommet mounting hole 7, and the lid is opened from the back side of the grommet mounting hole 7. The cylindrical portion 81 of the body 80 is inserted in alignment, and is externally mounted on the cylindrical portion 71 of the base body 70, and the engaging claw 83 is engaged with the engaging portion 73. As a result, both front and back surfaces of the grommet mounting hole 7 are sandwiched between the flange portion 72 of the base body 70 and the flange portion 82 of the lid body 80, so that the grommet 60 can be mounted on the mat 5 (see FIG. 5).

  When attaching the mat 5 to the carpet 1, the grommet insertion portion 41 of the main body portion 20 is inserted into the cylinder of the base body 70 of the grommet 60 in a state where the longitudinal direction of the knob portion 53 and the longitudinal direction of the long hole 45 are aligned. While aligning with the inner periphery of the portion 71, the knob portion 53 is aligned with the mounting hole 75 provided in the grommet 60, and the mat 5 is placed on the carpet 1. Then, the grommet insertion portion 41 of the main body portion 20 is inserted into the inner periphery of the cylindrical portion 71 of the grommet 60, the attachment hole insertion portion 43 of the main body portion 20 is inserted into the attachment hole 75 of the grommet 60, and the knob portion 53. Is inserted from the mounting hole 75 and disposed on the front side of the knob engaging wall 74 of the grommet 60 (see FIG. 5). In this state, the shaft portion 51 of the rotary knob 50 is disposed in the circular hole 45 a on one end side in the longitudinal direction of the long hole 45.

  In the above state, as shown in FIG. 5A, the rotary knob 50 is rotated in a direction in which the other end portion in the longitudinal direction of the knob portion 53 is close to the rotation restricting portion 78 (in this embodiment, it is turned clockwise). Then, as shown in FIG. 6, the knob portion 53 comes into contact with the corner portion 78 c of the rotation restricting portion 78 and is pushed by the rotation restricting portion 78, and the knob portion 53 is brought into contact with the surface of the knob engaging wall 74 by the reaction force. While rotating upward, the shaft portion 51 passes through the constricted portion 45 c and moves to the circular hole 45 b on the other axial end side of the long hole 45. At this time, the circular portion 51a of the shaft portion 51 passes through the constricted portion 45c in a press-fit state while bending a portion of the peripheral wall 43a of the mounting hole inserting portion 43 that matches the constricted portion 45c in the outer diameter direction.

  Further, when the rotary knob 50 is further rotated and one side portion of the long side of the knob portion 53 comes into contact with the orthogonal surface 78b of the rotation restricting portion 78, the longitudinal direction of the knob portion 53 is attached as shown in FIG. In a state substantially perpendicular to the longitudinal direction of the hole 75, further rotation of the rotary knob 50 is restricted and stopped. As a result, the knob portion 53 engages with the front peripheral edge of the attachment hole 75, so that the mat 5 can be fixed to the carpet 1 via the mat fixing device 10.

  As described above, in this mat fixing device 10, after the knob portion 53 is inserted into the mounting hole 75, the shaft portion 51 of the rotary knob 50 is rotated by the circular hole 45 a of the long hole 45 only by rotating the knob portion 53. Since the knob portion 53 can be stopped at a position intersecting the attachment hole 75 and engaged with the peripheral edge of the attachment hole 75, the carpet 1 can be surely secured by a simple operation. The mat 5 can be fixed to.

  As shown in FIG. 8, even when the mat 5 is fixed to the carpet 1 and the knob portion 53 is rotated by an unexpected external force and does not intersect the mounting hole 75, Since the shaft portion 51 is located in the circular hole 45b on the other end side in the axial direction of the long hole 45, the knob portion 53 engages with the periphery of the mounting hole 75 and is prevented from coming off, and the knob portion 53 is attached to the mounting hole. 75 is prevented, the state in which the mat 5 is fixed to the carpet 1 is reliably maintained, and the mat 5 can be held so as not to be detached from the carpet 1.

  On the other hand, when it is desired to remove the mat 5 from the carpet 1 for cleaning, replacement, etc., the knob portion 53 is rotated so that its longitudinal direction is aligned with the longitudinal direction of the mounting hole 75, and the shaft portion 51 of the rotary knob 50. Is moved from the circular hole 45b of the long hole 45 to the circular hole 45a (see FIG. 5). Thereafter, by pulling the mat 5 away from the carpet 1, the knob portion 53 is extracted from the attachment hole 75 of the grommet 60, and the mat 5 can be removed from the carpet 1.

  In this embodiment, the constricted portion 45 c is formed in the middle of the long hole 45 with a gap C smaller than the outer diameter D of the circular portion 51 a of the shaft portion 51, and the shaft portion 51 of the rotary knob 50 is long. When moving between the circular holes 45a and 45b of the hole 45, the circular part 51a of the shaft part 51 passes through the constricted part 45c in a press-fit state. By providing the constricted portion 45c in this manner, the shaft portion 51 of the rotary knob 50 that has moved to the circular hole 45b on the other end side in the longitudinal direction of the long hole 45 is less likely to return to the circular hole 45a on the one end side in the longitudinal direction. Therefore, it is possible to more reliably prevent the knob portion 53 from coming off from the mounting hole 75.

  Furthermore, in this embodiment, when the circular part 51a of the shaft part 51 passes through the constricted part 45c in the press-fitted state, the part of the peripheral wall 43a of the mounting hole inserting part 43 that is aligned with the constricted part 45c Since the shaft portion 51 moves between the circular holes 45a and 45b of the long hole 45, the constricted portion 45c can be easily passed.

  In this embodiment, the rotation restricting portion 78 is provided with an orthogonal surface 78b orthogonal to the longitudinal direction of the mounting hole 75. When the knob portion 53 is inserted into the mounting hole 75 and rotated, the same knob is provided. One side portion of the long side of the portion 53 abuts on the orthogonal surface 78b of the rotation restricting portion 78 so that the knob portion 53 stops at an angle orthogonal to the longitudinal direction of the mounting hole 75 (FIG. 7). reference). Therefore, both end portions in the longitudinal direction of the knob portion 53 can be engaged with the front peripheral edge portion of the attachment hole 75, so that a large allowance for the knob portion 53 with respect to the attachment hole 75 can be secured. Can be prevented from coming off more reliably.

DESCRIPTION OF SYMBOLS 1 Carpet 5 Mat 10 Mat fixing device 20 Main body part 30 Fixing part 40 Support part 45 Long hole 45a, 45b Circular hole 45c Constriction part 50 Rotation knob 51 Shaft part 53 Knob part 55 Retaining part 60 Grommet 75 Attachment hole 78 Rotation restriction part

Claims (4)

A main body portion attached to the carpet side and a grommet attached to the mat side are provided, and a rotation knob provided in the main body portion is inserted and rotated through an attachment hole provided in the grommet to prevent it from coming off. In the mat fixing device configured to connect the carpet and the mat,
The main body has a fixing part to the carpet, a support part connected to the fixing part, and a long hole provided in the support part.
The rotary knob has a shaft portion inserted through the elongated hole, a knob portion provided at a front side end portion of the shaft portion, and a retaining portion provided at a back side end portion of the shaft portion,
The elongated hole is provided with a constricted portion that can pass through the shaft portion in a press-fitted state in the middle,
The mounting hole of the grommet allows the knob portion to be inserted when the rotary knob is at a predetermined rotation angle with the shaft portion of the rotary knob positioned on one end side of the elongated hole, and the rotary knob is When the angle is different from the rotation angle, or when the shaft portion of the rotary knob is moved to the other end side of the elongated hole, the knob portion cannot be inserted and is prevented from coming off,
When the rotary knob is rotated in a state where the shaft portion of the rotary knob is positioned on one end side of the long hole, one end of the knob portion comes into contact with the shaft portion of the knob portion near the mounting hole of the grommet. the long end side is slid in the hole, the mat anchoring device longitudinal direction of the handle portion, characterized in that the rotation regulating portion for stopping at a position intersecting the longitudinal direction of the mounting hole.   The long hole has a dharma hole shape in which two circular holes are partially overlapped and a constriction is formed in the middle. The outer diameter of the shaft portion of the rotary knob is larger than the inner diameter of each circular hole. 2. The mat fixing device according to claim 1, wherein the mat fixing device is formed to be smaller and larger than a gap between the constricted portions, and the shaft portion passes through the constricted portions in a press-fit state.   3. The mat fixing device according to claim 2, wherein at least one side wall portion of the constricted portion of the elongated hole can be bent in an outer diameter direction when the shaft portion passes through the constricted portion. The rotation restricting portion of the grommet is formed to stop the longitudinal direction of the knob portion at an angle orthogonal to the longitudinal direction of the mounting hole when the knob portion is inserted into the mounting hole and rotated. The mat fixing device according to any one of claims 1 to 3.