JP2020008089A - Member mounting structure - Google Patents

Abstract

To provide a member mounting structure capable of temporarily holding a mounting tool reliably even in a case where a mounting member is thin, and capable of regulating rotation.SOLUTION: A member mounting structure comprises a mounting tool 30 having a head 31, a shaft 33, an engagement protrusion 35, and an elastic engagement piece 40. A first notch groove 22 and a temporary holding groove 23 are formed in an insertion hole 20. A second notch groove 7 is formed in a mounting hole 5. The elastic engagement piece 40 is provided with: an engagement step part 45 engaging with the back side peripheral edge of the insertion hole 20; and a rotation regulation part 47 provided continuously with the engagement step part 45 on the head 31 side, and arranged in the temporary holding groove 23 in a state where the elastic engagement piece 40 engages with the temporary holding groove 23. One side of the inner circumference of the temporary holding groove 23 forms a stopper wall 24 that engages with the rotation regulation part 47 to regulate the rotation of the mounting tool 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a member mounting structure for mounting a mounting member to a mounted member.

  2. Description of the Related Art Conventionally, as a structure for attaching a mounting member to a member to be mounted, a mounting member (pin) provided with a flange portion and a locking claw is inserted into a hole of both members by superimposing the mounting member on the member to be mounted. By rotating the mounting tool, the locking claw is locked to the peripheral edge of the hole of the mounted member, and the flange portion is locked to the peripheral edge of the hole of the mounting member, so that the mounting member can be mounted to the mounted member. Is being done. Here, as a mounting structure using a mounting member, the mounting member is temporarily held in advance by the mounting member and then mounted on the member to be mounted.

  As a conventional structure of this type, Japanese Patent Application Laid-Open Publication No. H11-216, discloses a structure in which one component having a mounting hole and another component having a through hole are fastened using a clip body. A rotating shaft portion is provided on the lower surface side of the elastic flange portion of the clip body, and the rotating shaft portion is detachably engaged with a locking claw that locks in a mounting hole of one component and a through hole of another component. A fastening structure for components is described in which a locking shoulder for stopping is formed and a projection is formed on the lower surface of the elastic flange portion. Further, a concave guide groove having a predetermined depth is formed on the periphery of the mounting hole of one component, and a positioning concave portion having a concave shape deeper than the guide groove is formed at both ends of the guide groove. Is formed. Then, by inserting the rotating shaft portion into the mounting hole of one component, the elastic flange portion is engaged with the front side peripheral edge of the mounting hole, and the locking claw is engaged with the rear side peripheral edge of the mounting hole, and By fitting the projection into one of the positioning recesses, the clip is temporarily held by one component in a state where the rotation of the clip is restricted. In this state, one component is placed on another component, and after inserting the rotary shaft into the through-hole of the other component, when the rotary shaft is rotated, the locking shoulder engages the back side peripheral edge of the through-hole. At the same time, the projection moves in the guide groove and fits into the other positioning recess, so that the two parts are sandwiched between the elastic flange portion and the lock shoulder and attached in a state where the rotation of the clip is restricted. It has become.

JP-A-6-18706

  However, in the component fastening structure of Patent Document 1, a concave guide groove and a deeper concave positioning recess are formed in one component, so that the thickness of one component is small. However, it may be difficult to form them, and it may not be possible to achieve temporary holding and rotation control of the clip body.

  Therefore, an object of the present invention is to provide a member mounting structure that can securely hold a mounting tool even with a thin mounting member and can restrict rotation.

  Means for Solving the Problems To achieve the above object, the present invention provides a method for attaching a mounting member to a mounting member by inserting and rotating the mounting member into a mounting hole provided in the mounting member and an insertion hole provided in the mounting member. A mounting portion for engaging the front side edge of the insertion hole, and a shaft portion extending from the head portion and inserted into the insertion hole and the mounting hole. And an engaging projection projecting radially outward from an outer periphery on the distal end side of the shaft portion, and an elastic engaging piece formed on the head side of the shaft portion. A first notch groove through which the engagement protrusion can pass and a temporary holding groove through which the elastic engagement piece can engage are formed, and a second passage through which the engagement protrusion can pass is formed in the mounting hole. A notch groove is formed, and the elastic engaging piece has an engaging step portion that engages with the back side peripheral edge of the insertion hole, A rotation restricting portion provided in the temporary holding groove in a state in which the elastic engagement piece is engaged with the temporary holding groove, the rotation holding portion being provided on the head side; One side of the inner periphery of the mounting tool engages with the rotation restricting portion when the mounting fixture is rotated in a predetermined direction in a state where the rotation restricting section is disposed in the temporary holding groove. A stopper wall for restricting the rotation of the temporary holding groove, and the other side of the inner periphery of the temporary holding groove, in a state where the rotation restricting portion is arranged in the temporary holding groove, the mounting tool is moved in the predetermined direction. It is characterized in that it has a shape that allows the attachment to rotate when rotated in the opposite direction.

  According to the present invention, by inserting the shaft portion of the mounting tool into the insertion hole of the mounting member and positioning the elastic engagement piece in the temporary holding groove, the engagement step of the elastic engagement piece is formed on the back side peripheral edge of the insertion hole. Therefore, the attachment can be temporarily held by the attachment member, and in this state, when the attachment is rotated toward the stopper wall side of the temporary holding groove, the rotation restricting portion of the elastic engagement piece is rotated. Since the rotation is restricted by contacting the stopper wall, the rotation of the mounting member can be reliably restricted even when the mounting member is thin.

It is a perspective view showing one embodiment of a member mounting structure concerning the present invention. It is a top view of the insertion hole which comprises the member attachment structure. It is an expansion perspective view of the attachment which comprises the member attachment structure. (A) is a front view of the same mounting tool, (b) is a side view of the same mounting tool. (A) is a sectional perspective view of the attachment, and (b) is a sectional view of the attachment. 4A and 4B show a relationship between an insertion hole and a mounting tool in the member mounting structure, and FIG. 6A is a diagram illustrating a state in which a rotation restricting portion is located in a temporary holding groove and the mounting tool is temporarily held by the mounting member; FIG. 4 is an explanatory view of a state in which the mounting fixture is rotated from the state of (a) in a direction in which rotation is allowed, and FIG. FIG. 6A shows a relationship between an insertion hole and a mounting tool in the member mounting structure, wherein FIG. 6A shows a state in which the mounting tool is rotated from the state shown in FIG. FIG. 7B is an explanatory view of a state in which the portion is located, and FIG. 7B is an explanatory view of a state in which the attachment has been rotated from the state of FIG. It is a perspective view of the state where the attachment was temporarily held by the attachment member. 4A and 4B show a state in which a mounting member is mounted on a mounted member via a mounting tool, wherein FIG. 4A is a cross-sectional view thereof, and FIG. 4B is a cross-sectional view in a direction different from FIG. It is a perspective view showing other embodiments of a member mounting structure concerning the present invention. 4A and 4B show a relationship between an insertion hole and a mounting tool in the member mounting structure, and FIG. 6A is a diagram illustrating a state in which a rotation restricting portion is located in a temporary holding groove and the mounting tool is temporarily held by the mounting member; FIG. 7 is an explanatory view of a state in which the attachment is rotated in a direction allowing rotation from the state of FIG. 7A and the rotation restricting portion is located in the first notch groove.

  Hereinafter, an embodiment of a member mounting structure according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1 and FIG. 9, this member mounting structure is configured such that a mounting member 30 is inserted into a mounting hole 5 provided in the mounted member 1 and an insertion hole 20 provided in the mounting member 10. The mounting member 10 is mounted on the mounted member 1 by inserting and rotating the mounting member 10.

  As shown in FIG. 1 and FIGS. 3 to 5, the attachment 30 in this embodiment means the front side of the insertion hole 20 (the side opposite to the surface of the insertion hole 20 facing the member 1 to be attached). The same applies to the following description). The head 31 is engaged with the periphery of the shaft, the shaft 33 extends from the head 31 and is inserted into the insertion hole 20 and the mounting hole 5, and the outer periphery of the shaft 33 on the distal end side. It has a pair of engagement projections 35, 35 projecting radially outward, and a pair of elastic engagement pieces 40, 40 formed on the head 31 side of the shaft 33. Further, as shown in FIGS. 5A and 5B, each elastic engagement piece 40 has a back side of the insertion hole 20 (a side of the insertion hole 20 facing the member 1 to be attached. (The same applies to the description.) An engaging step 45 that engages with the periphery of the engaging step 45 is provided on the head 31 side with respect to the engaging step 45, and the elastic engaging piece 40 engages with the temporary holding groove 23. In this state, there is provided a rotation restricting portion 47 disposed in the temporary holding groove 23. The structure of the attachment 30 will be described later in detail.

  The mounted member 1 in this embodiment is an undercover that covers an oil pan disposed below the vehicle, and the mounting member 10 is a lid that is openably and closably mounted on the undercover. The lid is removed from the under cover when the engine oil is drained from the oil pan in order to change the engine oil. The member to be mounted may be, for example, a vehicle body panel or a vehicle body frame, and the mounting member may be a trim board, a garnish, or the like, and is not particularly limited.

  As shown in FIG. 1, the mounting member 1 in this embodiment is formed with a circular concave portion 3 having a predetermined depth on the surface facing the mounting member 10. The mounting hole 5 is provided at the bottom of the. The mounting hole 5 has a substantially circular hole shape at the center, and a pair of second notches 7, 7 are formed outward from a portion facing in the circumferential direction. In a state. A pair of engagement protrusions 35 of the fixture 30 can pass through the pair of second notch grooves 7.

  The shape of the mounting hole is not limited to the above shape. For example, the number of the second notch grooves may be one or three or more. At least a second notch groove through which the shaft portion of the mounting tool can be inserted and through which the engaging protrusion can pass is provided. I just need.

  On the other hand, as shown in FIG. 2, in this embodiment, the insertion hole 20 provided in the attachment member 10 has a substantially circular hole shape, and the shaft hole 21 through which the shaft portion 33 of the attachment 30 is inserted. have. As shown in FIG. 6 and FIG. 7, the inner diameter of the shaft hole 21 of this embodiment is substantially matched with the outer diameter of the shaft portion 33 of the fixture 30. In addition, a pair of first notch grooves 22, 22 cut out at a fixed width from a position facing the shaft hole 21 in the circumferential direction extend outward of the shaft hole 21. The insertion hole 20 as a whole has a keyhole shape together with the shaft hole 21. The pair of first notches 22, 22 allow the pair of engaging projections 35, 35 of the fixture 30 to pass therethrough.

  Further, the insertion hole 20 is formed with a temporary holding groove 23 with which the elastic engagement piece 40 of the attachment 30 can be engaged. As shown in FIG. 1, the temporary holding groove 23 is formed by cutting out the entire area in the thickness direction of the mounting member 10. Further, as shown in FIG. 2, in this embodiment, a point symmetrical with respect to the inner periphery of the shaft hole 21 and obliquely opposed to the center C1 of the shaft hole 21, that is, the center C1 of the shaft hole 21. A pair of temporary holding grooves 23, 23 are formed at positions where.

  Further, one side of the inner periphery of each temporary holding groove 23 is attached to the mounting fixture 30 in a state where a rotation restricting portion 47 (see FIGS. 5A and 5B) described later is arranged in the temporary holding groove 23. When the attachment 30 is rotated in a predetermined direction, that is, when the attachment 30 is rotated in a direction indicated by an arrow R1 in FIG. A stopper wall 24 that regulates the rotation of the stopper is formed. In the following description, the direction of the arrow R1 will be described as a first rotation direction R1. That is, in this embodiment, one side of the inner periphery of the temporary holding groove 23 on the first rotation direction R1 side forms the stopper wall 24.

  As shown in FIG. 2, when the insertion hole 20 is viewed from the front side (when viewed from a direction perpendicular to the surface direction of the mounting member 10), the stopper wall 24 of this embodiment is provided with the insertion hole. A straight line L2 passing through the center C1 of the 20 shaft hole 21 and orthogonal to the straight line L1 along the arrangement direction of the pair of first notch grooves 22, 22 slightly exceeds the first rotation direction R1. At a position, it is formed so as to form a straight line parallel to the straight line L2.

  Further, on the other side of the inner periphery of each temporary holding groove 23, with the rotation restricting portion 47 disposed in the temporary holding groove 23, as shown by the arrow R <b> 2 in FIG. When rotated in the direction opposite to the direction of the arrow R1, the engagement between the rotation restricting portion 47 and the stopper wall 24 is released, and the rotation of the attachment 30 is allowed (see FIG. 2). ). In the following description, the direction of the arrow R2 will be described as a second rotation direction R2 opposite to the first rotation direction R1.

  As shown in FIG. 2, the other side of the inner periphery of each temporary holding groove 23 (the side of the temporary holding groove 23 facing the stopper wall 24 in the circumferential direction) has an R-shaped round shape. And a pressing portion 25. That is, in this embodiment, the other side of the inner circumference of the temporary holding groove 23 on the second rotation direction R2 side forms the pressing portion 25. As shown in FIG. 6B, when the attachment 30 is rotated in a direction opposite to the predetermined direction, that is, in the second rotation direction R2, the pressing portion 25 pushes the rotation restricting portion 47 of the attachment 30. When pressed, the elastic engagement piece 40 bends and deforms radially inward of the shaft portion 33 (see FIG. 6C).

  Also, as shown in FIG. 2, the minimum distance D1 of the pressing portion 25 from the center C1 of the insertion hole 20 is from the axis C2 of the shaft portion 33 of the rotation restricting portion 47 shown in FIG. Is formed to be smaller than the maximum distance D2.

  Further, as shown in FIG. 2, a pair of corners 26 and 27 (a pair of corners at a boundary with the shaft hole 21) of each first notch groove 22 facing the center C1 side of the insertion hole 20 are as follows. It has a shape like That is, one corner 26 of the first notch groove 22 on the pressing portion 25 side (a corner near the pressing portion 25 on the first rotation direction R1 side of the fixture 30) is rounded in an R shape. It has a tinged shape. On the other hand, the other corner 27 of the first notch groove 22 on the side of the stopper wall 24 (the corner near the stopper wall 24 on the second rotation direction R2 side of the fixture 30) has a sharp and square shape. It has become.

  Accordingly, as shown in FIG. 7A, when the attachment 30 is rotated in the first rotation direction R1 while the rotation restricting portion 47 of the attachment 30 is located in the first notch groove 22, The R-shaped corner portion 26 allows the rotation restricting portion 47 to pass therethrough, so that the attachment 30 can be rotated. On the other hand, in the above state, even if the attachment 30 is to be rotated in the second rotation direction R2, the rotation restricting portion 47 is engaged with the angular corner 27 and the passage thereof is blocked, and the attachment 30 is moved. Cannot rotate.

  The shape of the insertion hole is not limited to the above shape. For example, the number of the first notch grooves may be one or three or more, or the number of the temporary holding grooves may be one or three or more. A first notch groove through which the engaging projections can pass, and a temporary holding groove through which the elastic engaging piece can be engaged, and an inner peripheral side of the temporary holding groove restricts rotation of the fixture. What is necessary is just to form a wall, and the other side of the inner periphery of a temporary holding groove should be made into the shape which can allow rotation of a fixture.

  In this embodiment, as shown in FIGS. 1, 6, and 7, when the insertion hole 20 is viewed from the front side, the counterclockwise direction is the first rotation direction R1 of the mounting fixture 30, and the clockwise direction is the mounting direction. As the second rotation direction R2 of the tool 30, one side of the temporary holding groove 23 on the first rotation direction R1 side is a stopper wall 24, and the other side of the temporary holding groove 23 on the second rotation direction R2 is a pressing portion 25. Conversely, the clockwise direction is the first rotation direction R1 of the fixture 30, the counterclockwise direction is the second rotation direction R2 of the fixture 30, and the corresponding two sides of the temporary holding groove 23 are stoppers. The wall 24 and the pressing portion 25 may be used.

  Next, the structure of the fixture 30 will be described in detail. As shown in FIG. 1 and FIGS. 3 to 5, the attachment 30 in this embodiment has a substantially disk-shaped head 31 that engages with the front side peripheral edge of the insertion hole 20. As shown in FIG. 1, a tool insertion groove 31a into which a tool such as a flathead screwdriver (not shown) can be inserted is formed on the front side of the head 31. As shown in FIG. 3, a concave groove 31 b having a constant width is formed on the back side of the head 31 so as to pass through the axis C <b> 2 of the shaft portion 33.

  In the following description, one side in the circumferential direction of the elastic engagement piece 40 and the rotation restricting portion 47 means a side in the same direction as one side of the inner periphery of the temporary holding groove 23 ( That is, it means the side portion on the first rotation direction R1 side), and the other side in the circumferential direction of the elastic engagement piece 40 and the rotation restricting portion 47 is the other side of the inner periphery of the temporary holding groove 23, It means the sides in the same direction (that is, the sides on the second rotation direction R2 side).

  A substantially cylindrical shaft portion 33 extends from the center of the back side of the head portion 31. As shown in FIG. 3 and FIG. 5B, a plate-like portion 33a having a long plate shape is provided on the inner periphery of the shaft portion 33 along a straight line L3 passing through the axis C2 of the shaft portion 33. The both sides are connected to the opposing inner peripheral surfaces of the shaft portion 33 to reinforce the shaft portion 33. The shaft portion 33 is inserted into the insertion hole 20 of the mounting member 10 and the mounting hole 5 of the mounted member 1. As long as the shaft portion can be inserted into the insertion hole and the attachment hole, the elastic engagement piece 40 is allowed to bend radially inward when the attachment 30 is rotated in the second rotation direction R2. For this purpose, a shape having a gap is preferable.

  Furthermore, a pair of engaging projections 35 project from the outer periphery of the distal end portion of the shaft portion 33 in the extending direction, which are opposed in the circumferential direction, toward the outside in the radial direction. Here, similarly to the plate-like portion 33a, a pair of engagement protrusions 35 are arranged on a straight line L3 passing through the axis C2 of the shaft 33 (see FIG. 5B).

  The pair of engaging projections 35 pass through the pair of first notches 22 of the insertion hole 20 and pass through the pair of second notches 7 of the mounting hole 5. By rotating the mounting member 30 in the second rotation direction R2 in a state where the mounting member 30 is inserted through the pair of second notch grooves 7, 7, the back side of the mounting hole 5 (opposing the mounting member 10). (The opposite side to the surface). A tapered surface 35 a is formed on the outer surface of the engaging projection 35 on the distal end side of the shaft 33, and the shaft 33 of the fixture 30 is inserted into the insertion hole 20 or the mounting hole 5. At this time, the holes are hardly caught on the inner periphery of the holes.

  Further, as shown in FIGS. 3 and 5, the outer periphery of the shaft portion 33 on the head 31 side with respect to the arrangement direction (the direction along the straight line L3) of the pair of engagement protrusions 35, 35. A pair of elastic engaging pieces 40, 40 are provided at positions orthogonal to each other (positions along a straight line L4 orthogonal to the straight line L3) via a pair of slits 36, 36 communicating with the concave groove 31b. 33 is formed so as to be able to bend and deform radially inward and radially outward.

  As shown in FIG. 3 and FIG. 4A, each elastic engagement piece 40 has its base end side connected to the shaft 33 at a position away from the head 31, and has a distal end side (free end). Side) is disposed close to the head 31 side. As shown in FIGS. 4A and 5B, each elastic engagement piece 40 is formed such that both sides in the circumferential direction are parallel to each other. Further, as shown in FIGS. 4B and 5A, the outer surface 41 of each elastic engagement piece 40 gradually increases in height from the outer periphery of the shaft portion 33 from the base end toward the distal end. It is high and has a shape curved in an arc shape. Also, as shown in FIGS. 5A and 5B, the inner surface 43 of each elastic engagement piece 40 has an arcuate shape corresponding to the outer surface 41.

  Further, as shown in FIG. 5, the distal end side of each elastic engagement piece 40 close to the head 31 side is engaged with the back side of the insertion hole 20 (the side facing the attached member 1). A step 45 is provided to protrude radially outward of the elastic engagement piece 40. As shown in FIG. 4B, the engaging step 45 of this embodiment is configured such that the elastic engaging piece 40 extends from the top of the elastic engaging piece 40 that protrudes most from the outer periphery of the shaft 33 toward the tip of the elastic engaging piece 40. It has an inclined shape in which the protrusion height gradually decreases. As shown in FIGS. 5A and 5B, a portion of the engaging step 45 that protrudes radially outward is defined as an outermost diameter portion 45a. As shown in FIG. 5A, an arc-shaped drawing portion 45b is provided at a position of the engaging step portion 45 drawn radially inward from the outermost diameter portion 45a.

  In this embodiment, the pair of elastic engaging pieces 40, 40 align the pair of engaging projections 35, 35 with the pair of first notches 22, 22, and move the mounting member 30 into the insertion hole 20. In the inserted state, it is engaged with the peripheral edge of the shaft hole 21 of the insertion hole 20 to temporarily hold the attachment 30 by the attachment member 10, and in this state, the attachment 30 is moved toward the second rotation direction R2. As shown in FIG. 7A, even if the pair of engaging projections 35 are rotated to a position orthogonal to the pair of first notch grooves 22, 22, the first notch groove 22 is rotated. The fitting 30 is engaged with the boundary between the shaft hole 21 and the shaft hole 21 so that the attachment 30 does not fall out of the insertion hole 20.

  Further, in a state where each elastic engagement piece 40 is provided on the head 31 side with respect to the engagement step portion 45 and the elastic engagement piece 40 is engaged with the temporary holding groove 23, FIG. As shown in (a) and (b), a rotation restricting portion 47 is provided in the temporary holding groove 23.

  As shown in FIG. 5A, the rotation restricting portion 47 in this embodiment is arranged such that the resilient engagement piece 40 extends radially outward from the retracted portion 45 b that is retracted from the outermost diameter portion 45 a of the engagement step portion 45. , And protrudes from the outermost diameter portion 45a of the engagement step portion 45 with a length that does not protrude. That is, as shown in FIG. 5B, the maximum protrusion length A1 of the rotation restricting portion 47 from the outer periphery of the shaft portion 33 is equal to the outermost diameter portion 45a of the engagement step portion 45. It is provided so as to be smaller than the protruding length A2 from the projection.

  Further, the rotation restricting portion 47 is provided on the other side in the circumferential direction of the engaging step portion 45 and temporarily held in the temporary holding groove 23 as shown in FIGS. 6 (a) and 6 (b). The groove 23 is provided at a position closer to the other side on the inner periphery. That is, as shown in FIGS. 5A and 5B, the other side in the circumferential direction of the rotation restricting portion 47 (the side portion facing the second rotation direction R2) is the other side in the circumferential direction of the elastic engagement piece 40. It is provided so that there is no step and it is flush with (the side facing the second rotation direction R2).

  The width B1 of the rotation restricting portion 47 along the circumferential direction is provided to be smaller than the width B2 of the engaging step portion 45 along the circumferential direction. Further, as shown in FIGS. 5A and 5B, both angles of the rotation restricting portion 47 in the rotation direction of the attachment 30 in a predetermined direction and the rotation direction of the attachment 30 in a direction opposite to the predetermined direction are shown. The portions 49 and 48, that is, the corners 49 of the rotation restricting portion 47 on the first rotation direction R1 side for restricting the rotation of the attachment 30, and the corners on the second rotation direction R2 side for allowing the rotation of the attachment 30. The part 48 has an R-shaped round shape.

  Further, as shown in FIG. 6A, in a state where the rotation restricting portion 47 is in contact with the stopper wall 24, a gap S is formed between the rotation restricting portion 47 and the other side of the inner periphery of the temporary holding groove 23. Is provided. In this embodiment, one side of the rotation restricting portion 47 in the circumferential direction (the side facing the first rotation direction R1) is in contact with the stopper wall 24, and the other end of the rotation restricting portion 47 in the circumferential direction contacts the stopper wall 24. A gap S is provided between the temporary holding groove 23 and the R-shaped pressing portion 25.

  In addition, the structure of the attachment described above is not limited to the above embodiment. For example, the number of engagement protrusions or elastic engagement pieces may be one, or three or more. That is, the attachment has at least a head, a shaft, an engagement protrusion, and an elastic engagement piece, and the elastic engagement piece has an engagement step, a rotation restricting part, The structure is not particularly limited as long as the structure is provided.

  Next, the operation of the member mounting structure having the above configuration will be described.

  That is, as shown in FIG. 1, the pair of first notches 22, 22 of the insertion hole 20 are aligned with the pair of engagement projections 35, 35 of the mounting fixture 30, and the mounting is performed from the front side of the insertion hole 20. When the tool 30 is inserted, the pair of engagement protrusions 35, 35 is inserted from the back side of the pair of first notch grooves 22, 22, and the inner circumference of the shaft hole 21 of the insertion hole 20, The outer surfaces 41 of the elastic engaging pieces 40 are respectively pressed, and the pair of elastic engaging pieces 40, 40 are pushed in while being bent and deformed radially inward of the shaft portion 33. Thereafter, when the top of each elastic engagement piece 40 gets over the pair of notch grooves 22, 22, the pair of elastic engagement pieces 40, 40 elastically returns, and the engagement step portions 45, 45 are inserted. While being engaged with the back side peripheral edge of the shaft hole 21 of the hole 20, the pair of rotation restricting portions 47, 47 are inserted and arranged in the pair of temporary holding grooves 23, 23 of the insertion hole 20 (FIG. 6 (a)). ), (B)), and the attachment 30 is temporarily held by the attachment 10 as shown in FIG.

  As described above, in a state where the pair of rotation restricting portions 47, 47 of the attachment 30 are disposed in the pair of temporary holding grooves 23, 23 of the insertion hole 20, the attachment 30 is moved toward the first rotation direction R1. 6A, one side of the rotation regulating portion 47 in the circumferential direction abuts against the stopper wall 24 located on one side of the inner periphery of the temporary holding groove 23, as shown in FIG. The further rotation of is controlled.

  On the other hand, when the fixture 30 is rotated in the second rotation direction R2 in a state where the pair of rotation restricting portions 47, 47 of the fixture 30 are arranged in the pair of temporary holding grooves 23, 23 of the insertion hole 20. As shown in FIG. 6B, the R-shaped pressing portion 25 located on the other side of the inner periphery of each of the temporary holding grooves 23 is rotated by the rotation restricting portion 47 via the R-shaped corner portion 48. To cause the pair of elastic engagement pieces 40, 40 to bend and deform radially inward of the shaft portion 33. At this time, since the pressing portion 25 has an R shape and the corner 48 of the rotation restricting portion 47 also has an R shape, it is possible to prevent the corner 48 of the rotation restricting portion 47 from being caught on the pressing portion 25. Thus, the rotation restricting portion 47 is pressed by moving so that the R surface of the corner portion 48 slides on the R surface of the pressing portion 25. When the attachment 30 is further rotated in the second rotation direction R2, as shown in FIG. 6C, each elastic engagement piece 40 is further bent radially inward of the shaft portion 33 and deformed. When the rotation restricting portion 47 provided on the engagement piece 40 reaches each of the first notch grooves 22, the pair of elastic engagement pieces 40, 40 respectively return elastically, and as shown in FIG. Are arranged in the first notch grooves 22.

  Further, as shown in FIG. 7A, a pair of elastic engagement pieces 40, 40 of the fixture 30 and a pair of rotation restricting portions 47, 47 are provided in the pair of first notches 22, 22 of the insertion hole 20. When the attachment 30 is rotated again in the first rotation direction R1 in a state in which is disposed, as shown in FIG. 7 (b), the R-shaped of each first notch groove 22 on the pressing portion 25 side. By pressing the rotation restricting portion 47 via the R-shaped corner portion 49 by the formed corner portion 26, the pair of elastic engagement pieces 40, 40 are bent and deformed radially inward of the shaft portion 33. Let it. At this time, since the corner 26 of the first notch groove 22 has an R shape and the corner 49 of the rotation restricting portion 47 has an R shape, the corner 26 of the first notch groove 22 has The corner portion 49 of the rotation restricting portion 47 is prevented from being caught, and the R surface of the corner portion 49 moves so as to slide on the R surface of the corner portion 26 so that the rotation restricting portion 47 is pressed. I have. Thereafter, when each of the rotation restricting portions 47 reaches each of the temporary holding grooves 23, each of the elastic engagement pieces 40 elastically returns, respectively, as shown in FIGS. 6 (a) and 6 (b). , 23, a pair of rotation restricting portions 47, 47 are inserted and arranged.

  On the other hand, when the attachment 30 is further rotated in the second rotation direction R2 from the state shown in FIG. 7A, the angular portions 27 of the first notch grooves 22 on the stopper wall 24 side are formed. Since the other side in the circumferential direction of the rotation restricting portion 47 abuts, the rotation of the attachment 30 is restricted.

  That is, in this embodiment, as shown in FIGS. 6A and 6B, with the rotation restricting portion 47 disposed in the temporary holding groove 23, the mounting tool 30 is moved in the first rotation direction R1 side. When the attachment 30 is rotated, the rotation of the attachment 30 is restricted by the stopper wall 24 of the temporary holding groove 23, and when the attachment 30 is rotated in the second rotation direction R <b> 2, the rotation of the attachment 30 is performed by the pressing portion 25 of the temporary holding groove 23. Is acceptable. On the other hand, as shown in FIG. 7A, when the attachment 30 is rotated in the second rotation direction R2 in a state where the rotation restricting portion 47 is disposed in the first notch groove 22, the first notch is formed. The rotation of the attachment 30 is restricted by the corner 27 of the groove 22, and when the attachment 30 is rotated in the second rotation direction R <b> 1, the rotation of the attachment 30 is permitted by the corner 26 of the first notch groove 23. . In this manner, depending on whether the rotation restricting portion 47 is located in the temporary holding groove 23 or the first notch groove 22, the rotation direction for restricting the rotation of the fixture 30 and the rotation allowing the rotation of the fixture 30 are provided. The directions are different.

  Next, the operation and effect of the member mounting structure having the above structure will be described.

  First, as shown in FIG. 1, a pair of engagement protrusions 35 of the mounting member 30 are aligned with a pair of first notch grooves 22 of the insertion hole 20 of the mounting member 10, and the insertion hole 20. By inserting the mounting fixture 30 from the front side of FIG. 2, the engagement step portions 45 of the pair of elastic engagement pieces 40 engage with the back side peripheral edge of the shaft hole 21 of the insertion hole 20 (see FIG. 9 (a)), with the pair of rotation restricting portions 47, 47 inserted and arranged in the pair of temporary holding grooves 23, 23 of the insertion hole 20 (see FIGS. 6 (a), 6 (b)). As shown in FIG. 8, the attachment 30 can be temporarily held on the attachment 10. In this state, as shown in FIG. 6A, when the attachment 30 is rotated in the first rotation direction R1 side, that is, in the stopper wall 24 side of the temporary holding groove 23, the circumferential direction of the rotation regulating portion 47 is changed. Since the other side abuts against the stopper wall 24, the rotation of the attachment 30 can be restricted.

  As described above, in this mounting structure, the temporary holding groove 23 is formed over the entire area in the thickness direction of the mounting member 10, and the stopper is provided on one side of the temporary holding groove 23 by using the inner circumference of the temporary holding groove 23. Since the wall 24 is provided, even if the mounting member 10 is a lid having a small thickness, the mounting member 30 can be temporarily held securely, and the rotation thereof can be reliably restricted.

  After the attachment 30 is temporarily held on the attachment member 10 as described above, the pair of engagement projections of the attachment 30 is inserted into the pair of second notches 7, 7 of the attachment hole 5 of the attached member 1. The mounting members 10 are overlapped on the front side of the member 1 to be mounted while inserting the mounting tool 30 from the front side of the mounting hole 5 (the side of the mounting hole 5 facing the mounting member 10) by aligning the portions 35, 35. Match. Then, the pair of engaging projections 35, 35 are inserted from the pair of second notch grooves 7, 7, respectively, and the mounting member 10 comes into contact with the front side of the mounted member 1.

  In this state, as shown in FIG. 6B, when the fixture 30 is rotated in the second rotation direction R2, that is, toward the pressing portion 25 of the temporary holding groove 23, the R-shaped pressing portion 25 The rotation restricting portion 47 is pressed through the corner portion 48, and the pair of elastic engaging pieces 40, 40 are rotated while being flexed and deformed radially inward of the shaft portion 33 (FIG. 6 (c)). )), When each of the rotation restricting portions 47 reaches each of the first notch grooves 22, each of the elastic engagement pieces 40 is elastically restored (see FIG. 7A).

  As a result, as shown in FIG. 7A, the pair of elastic engagement pieces 40, 40 of the fixture 30 are arranged in the pair of first notches 22, 22 of the insertion hole 20, and As shown in FIG. 9 (b), the pair of engaging projections 35, 35 of the mounting tool 30 move to positions where the second notches 7, 7 of the mounting hole 5 do not exist, and the back side peripheral edge of the mounting hole 5. The mounting member 1 and the mounting member 10 are sandwiched between the head 31 of the mounting tool 30 and the engaging projection 35, and the mounting member 10 is attached to the mounting member 30 via the mounting tool 30. 1 can be attached.

  Further, when it is desired to remove the mounting member 10 from the mounted member 1, the pair of engaging projections 35, 35 of the mounting tool 30 are engaged with the back side peripheral edge of the mounting hole 5, and the pair of engaging holes 35 of the insertion hole 20. The state in which the pair of elastic engagement pieces 40, 40 and the pair of rotation restricting portions 47, 47 of the attachment 30 are arranged in the first notch grooves 22, 22 (FIGS. 7A and 9B). )), The attachment 30 is rotated again in the first rotation direction R1. Then, the rotation restricting portion 47 is pressed by the R-shaped corner portion 26 of each first notch groove 22 via the R-shaped corner portion 49, and the pair of elastic engagement pieces 40, 40 is formed on the shaft portion 33. Rotation is performed while being bent radially inward (see FIG. 7B), and when each rotation regulating portion 47 reaches each temporary holding groove 23, each elastic engagement piece 40 is elastically restored (FIG. 6A). ), (B)). As a result, the pair of engaging projections 35 of the mounting tool 30 are substantially aligned with the pair of first notch grooves 22 of the insertion hole 20 and the pair of second notch grooves 7 of the mounting hole 5. The mounting member 10 can be pulled out of the mounting hole 5 by detaching the mounting member 10 from the front side of the mounted member 1 in this state, and the mounting member 10 can be removed from the mounted member 1. .

  Further, as shown in FIG. 2 and FIG. 6B, in this embodiment, the other side of the inner periphery of the temporary holding groove 23 is rotated when the fixture 30 is rotated in the second rotation direction R2. The pressing portion 25 is configured to press the restricting portion 47 to bend the elastic engagement piece 40 inward in the radial direction.

  In the case of the above aspect, after temporarily holding the mounting member 30 on the mounting member 10, the shaft 33 of the mounting member 30 is inserted into the mounting hole 5 of the mounting member 1 in order to mount the mounting member 10 on the mounting member 1. When rotated in the second rotation direction R2, the rotation restricting portion 47 is pressed by the pressing portion 25, and the elastic engagement piece 40 is bent inward in the radial direction. It can be easily rotated. Further, as shown in FIG. 8, in a state in which the attachment 30 is temporarily held by the attachment member 10, before the attachment member 10 is attached to the attached member 1, the attachment 30 is rotated by the unexpected external force or the like. Even if it is attempted to rotate in the direction R2, the pressing portion 25 comes into contact with the rotation restricting portion 47, and the rotation can be restricted to some extent.

  Further, in this embodiment, as shown in FIG. 5, the rotation restricting portion 47 rotates in a predetermined direction of the attachment 30 (here, the first rotation direction R1) and a direction opposite to the predetermined direction of the attachment 30. In the rotation direction (here, the second rotation direction R2), both corners 49 and 48 have an R-shape, and the pressing portion 25 of the insertion hole 20 and the corner of the first notch groove 22 on the pressing portion 25 side. 26 is R-shaped. Therefore, as shown in FIG. 6B, the mounting tool 30 is moved in the second rotation direction R2 in order to mount the mounting member 10 on the mounted member 1 from the state where the mounting tool 30 is temporarily held in the insertion hole 20. The attachment 30 is rotated in the first rotation direction R <b> 1 to rotate the pair of engagement protrusions 35 to engage the back side peripheral edge of the attachment hole 5 or to remove the attachment member 10 from the attached member 1. When the attachment 30 is rotated to release the engagement between the pair of engagement protrusions 35, 35 of the attachment 30 and the attachment hole 5, that is, the attachment 30 is moved in either the first rotation direction R1 or the second rotation direction R2. When rotating in the direction, the attachment 30 can be smoothly rotated, and the attachment workability and the removal workability of the attachment member 10 can be improved. In addition, in the first rotation direction R1 and the second rotation direction R2 of the attachment 30 of the rotation restricting portion 47, both corners 49 and 48 are in an R shape, or the pressing portion 25 of the insertion hole 20 and the second If the corner 26 of the notch groove 22 on the pressing portion 25 side has an R shape, the same effect as described above can be obtained.

  In addition, as shown in FIG. 5, the rotation restricting portion 47 in this embodiment is retracted from the outermost diameter portion 45a of the engagement step portion 45, which is the portion most protruding radially outward (see FIG. 5). Since the protrusion B protrudes from the drawing-in portion 45b) and the width B1 along the circumferential direction thereof is smaller than the width B2 along the circumferential direction of the engaging step 45, the elastic engaging piece is provided. It is possible to secure a large allowance for the engagement step 45 with respect to the peripheral edge on the back side of the insertion hole 20 while suppressing an increase in the outer diameter of 40.

  Further, as shown in FIG. 5A, in this embodiment, the rotation restricting portion 47 is disposed on the other side in the circumferential direction of the engaging step portion 45 in the temporary holding groove 23. Since it is provided at a position closer to the other side of the inner periphery of the temporary holding groove 23, it is possible to secure a larger margin of the engaging step portion 45 with the peripheral edge on the back side of the insertion hole 20.

  Further, in this embodiment, as shown in FIG. 6A, in a state where the rotation restricting portion 47 is in contact with the stopper wall 24, the rotation restricting portion 47 and the other side of the inner periphery of the temporary holding groove 23 are contacted. , The attachment 30 can be more easily rotated in the second rotation direction R2, and the rotational force of the attachment 30 in the second rotation direction R2 is provided. And the pair of elastic engagement pieces 40, 40 can be easily bent and deformed radially inward of the shaft portion 33.

  10 and 11 show another embodiment of the member mounting structure according to the present invention. In addition, the same reference numerals are given to substantially the same parts as those in the above-described embodiment, and the description thereof is omitted.

  In the member mounting structure in this embodiment, the shape of the rotation restricting portion 47A of the mounting fixture 30A is different from that of the rotation restricting portion 47 of the mounting fixture 30 in the above embodiment. FIG. 10 is a cross-sectional perspective view showing a state in which the head of the attachment 30A is cut off. As shown in FIG. 10, the rotation restricting portion 47A of the attachment 30A of this embodiment includes an elastic member. On the head side of the mating piece 40, from the position retracted from the outermost diameter portion 45a of the engaging step 45, over the entire circumferential direction of the elastic engaging piece 40, The rotation restricting portion 47 </ b> A protrudes outward in the radial direction with a length that does not protrude from the outermost diameter portion 45 a of the engaging step 45.

  The rotation restricting portion 47A has a corner 48 on the second rotation direction R2 side, which is a rotation direction opposite to the predetermined direction of the attachment 30A, that is, a rotation direction that allows rotation, and has a round shape. On the other hand, the corner portion 49 on the first rotation direction R1 side, which is the rotation direction in the predetermined direction of the attachment 30, that is, the rotation direction for restricting the rotation, has an edge-like shape. ing.

  Further, as shown in FIG. 11, the insertion hole 20A provided in the mounting member 10 has a provisional holding groove 23A in which the elastic engagement piece 40 of the mounting tool 30A can be engaged, corresponding to the shape of the rotation restricting portion 47A. Thus, it is formed wider than the temporary holding groove 23 (see FIGS. 6 and 7) of the embodiment.

  In this embodiment, as shown in FIG. 11A, a state in which the pair of rotation restricting portions 47A, 47A of the attachment 30A are inserted and arranged in the pair of temporary holding grooves 23A, 23A of the insertion hole 20A. When the attachment 30A is rotated in the first rotation direction R1 side, that is, in the direction of the stopper wall 24 of the temporary holding groove 23A, one side of the rotation regulating portion 47A in the circumferential direction abuts on the stopper wall 24. The rotation of the attachment 30A can be restricted.

  When the fixture 30A is rotated from the state shown in FIG. 11A toward the second rotation direction R2, that is, toward the pressing portion 25 of the temporary holding groove 23A, the R-shaped pressing portion 25 becomes an R-shaped. The rotation restricting portion 47A is pressed via the corner portion 48, and the pair of elastic engagement pieces 40, 40 are bent and deformed radially inward of the shaft portion 33, so that the rotation of the attachment 30A is allowed. Similarly to the above-described embodiment, the mounting member 10 can be mounted on the mounted member 1 via the mounting fixture 30A.

  On the other hand, when the attachment 30A is rotated in the first rotation direction R1 from the state shown in FIG. 11B, the rotation restricting portion 47A has the edge-shaped corner portions 49, but each of the first notches. The rotation restricting portion 47A is pressed by the R-shaped corner portion 26 of the groove 22 to cause the pair of elastic engagement pieces 40, 40 to bend and deform radially inward of the shaft portion 33, so that the rotation of the attachment 30A is allowed. Thus, the attachment 30A can be pulled out from the attachment hole 5, and the attachment member 10 can be removed from the attached member 1.

  When the attachment 30A is rotated in the second rotation direction R2 from the state shown in FIG. 11B, the corners 27 of the first notch grooves 22 on the stopper wall 24 side are formed. Since the other side in the circumferential direction of the rotation restricting portion 47A abuts, the rotation of the attachment 30A is restricted.

  Note that the present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

REFERENCE SIGNS LIST 1 attached member 5 attachment hole 7 second notch groove 10 attachment member 20 insertion hole 22 first notch groove 23, 23A temporary holding groove 24 stopper wall 25 pressing portion 26, 27 corner portion 30, 30A mounting member 31 head 33 Shaft 35 Engagement protrusion 40 Resilient engagement piece 45 Engagement step 45a Outer diameter part 47, 47A Rotation regulation part 48, 49 Corner R1 First rotation direction R2 Second rotation direction S Clearance

Claims (6)

A member mounting structure for mounting the mounting member to the mounted member by inserting and rotating the mounting tool into the mounting hole provided in the mounted member and the insertion hole provided in the mounting member, and
The mounting tool includes a head engaged with a front side peripheral edge of the insertion hole, a shaft extending from the head and inserted into the insertion hole and the mounting hole, and a tip side outer periphery of the shaft. Has an engagement protrusion projecting radially outward from, and an elastic engagement piece formed on the head side of the shaft portion,
In the insertion hole, a first notch groove through which the engagement protrusion can pass, and a temporary holding groove with which the elastic engagement piece can engage, are formed.
A second notch groove through which the engaging protrusion can pass is formed in the mounting hole,
The elastic engaging piece includes an engaging step that is engaged with a peripheral edge on the back side of the insertion hole, and the elastic step is provided continuously with the engaging step on the head side. In a state engaged with the temporary holding groove, provided in the temporary holding groove, a rotation regulating portion is provided,
One side of the inner periphery of the temporary holding groove engages with the rotation restricting portion when the attachment is rotated in a predetermined direction in a state where the rotation restricting portion is disposed in the temporary holding groove. A stopper wall that regulates the rotation of the mounting tool, and the other side of the inner periphery of the temporary holding groove is configured such that the mounting tool is moved in a state where the rotation restricting portion is disposed in the temporary holding groove. A member mounting structure having a shape that allows rotation of the mounting tool when rotated in a direction opposite to a predetermined direction.   The other side of the inner periphery of the temporary holding groove presses the rotation restricting portion when the attachment is rotated in a direction opposite to the predetermined direction, and deflects the elastic engagement piece radially inward. The member mounting structure according to claim 1, wherein the member mounting structure comprises a pressing portion.   Both corners of the rotation restricting portion in the rotation direction of the attachment in the predetermined direction and the rotation direction of the attachment in a direction opposite to the predetermined direction are R-shaped, and / or the pressing portion. 3. The member mounting structure according to claim 2, wherein a corner of the first notch groove on the pressing portion side has an R shape. 4. The engagement step is provided so as to protrude radially outward of the elastic engagement piece,
The rotation restricting portion protrudes from a position where the engaging step portion is most protruded radially outward from a retracted position, and a width of the engaging step portion along a circumferential direction is equal to a peripheral portion of the engaging step portion. The member mounting structure according to any one of claims 1 to 3, wherein the member mounting structure is provided to be smaller than a width along the direction.   The rotation restricting portion is provided at a position on the other side in the circumferential direction of the engagement step portion and close to the other side of the inner periphery of the temporary holding groove while being arranged in the temporary holding groove. The member mounting structure according to any one of claims 1 to 4, wherein:   6. A gap is provided between the rotation restricting portion and the other side of the inner periphery of the temporary holding groove in a state where the rotation restricting portion is in contact with the stopper wall. The member mounting structure according to one of the above.

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