JP2015072021A - Lock component for fixture hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock component for fixture hole capable of increasing a resisting force of an umbrella-shaped flange part against its elastic deformation while accommodating for a plate thickness variation of a member to be fixed or a size error of an engaging leg and the like and preventing the umbrella-shaped flange part from being hardly warped.SOLUTION: This lock component 10 for a fixture hole comprises an umbrella-shaped flange part 30 abutted against a circumferential edge of a front side of fixture hole of a member to be fixed; and an engaging leg 40 extending from a rear surface side of the umbrella-shaped flange part 30, inserted into the fixture hole and engaged with its rear side edge part. There are provided protrusions 35 extending from positions at the front surface side of the umbrella-shaped flange part 30 including a warp fulcrum point when the umbrella-shaped flange part is depressed from its rear surface side and warped toward the outer diameter side of the umbrella-shaped flange part 30 to increase a resisting force against the elastic deformation of the umbrella-shaped flange part 30.

Description

  The present invention relates to a locking tool that is inserted into an attachment hole and attached to the attachment hole.

  For example, a mounting hole is formed in a vehicle body panel or the like of an automobile, and a trim board or the like is attached to the vehicle body panel or the like via a locking tool that is inserted into and attached to the mounting hole. In addition, a locking tool (so-called hole plug) may be attached to close the attachment hole.

  For example, a locking tool is known that includes an umbrella-shaped flange portion that contacts the front-side periphery of the mounting hole, and a locking leg that extends from the back surface of the umbrella-shaped flange portion and engages the back-side periphery of the mounting hole. ing. This locking tool is adapted to be attached to the mounting hole by appropriately deforming the umbrella-shaped flange portion according to the plate thickness of the mounted member in which the mounting hole is formed, the dimensional error of the locking leg, or the like. Yes.

  Further, in Patent Document 1 below, a pair of front and back flange portions that sandwich a base material, a flange portion for sealing that is connected to the back side flange portion, and a head portion for engagement that engages with an insertion hole of a mounted plate material, A synthetic resin retainer is described.

  The sealing flange portion includes a cap-shaped base portion whose diameter is increased obliquely downward from the base portion of the back-side flange portion, and a ring-shaped annular edge portion extending around the periphery of the cap-shaped base portion. A boundary portion with the cap-shaped base portion forms a first seal portion, and a peripheral portion of the annular edge portion forms a second seal portion. Further, a plurality of ribs are connected between the back side flange portion and the cap-shaped base portion of the sealing flange portion.

Japanese Utility Model Publication No. 6-71911

  In the case of the synthetic resin retainer of Patent Document 1, the space between the back flange portion and the cap base portion of the seal flange portion is extended by a plurality of ribs, thereby preventing the cap base portion from being deformed. (See paragraph 0009 of Patent Document 1). However, since the cap-shaped base portion is not deformed, there is a problem that it is difficult to cope with a variation in the thickness of the mounted plate material.

  Accordingly, an object of the present invention is to increase the resistance to elastic deformation of the umbrella-shaped flange portion and cope with warping of the umbrella-shaped flange portion while dealing with variations in the plate thickness of the attached member, dimensional errors of the locking legs, and the like. It is an object of the present invention to provide a locking tool for a mounting hole that can be made difficult.

  In order to achieve the above-mentioned object, the locking tool to the mounting hole according to the present invention is extended from the umbrella-shaped flange portion that comes into contact with the front side periphery of the mounting hole of the mounted member, and the back surface of the umbrella-shaped flange portion, A locking leg that is inserted into the mounting hole and engages with a rear edge of the mounting hole, on the front surface side and / or the back surface side of the umbrella flange portion, and the umbrella flange portion is pressed from the back surface side. A protrusion is provided that extends from a position including a warping fulcrum at the time of warping toward the outer diameter side of the umbrella-shaped flange portion and increases resistance to elastic deformation of the umbrella-shaped flange portion. .

  In the locking tool for the mounting hole according to the present invention, the protrusion is formed so as to become narrower toward the outer diameter side of the umbrella-like flange portion when viewed from the axial direction of the locking leg. It is preferable.

  In the locking tool for the mounting hole according to the present invention, the protrusion is formed such that the height from the surface side of the umbrella-shaped flange portion decreases toward the outer diameter side of the umbrella-shaped flange portion. It is preferable.

  In the locking tool for the mounting hole according to the present invention, the umbrella-shaped flange portion is formed so that the back surface thereof is 15 to 30 ° with respect to a plane perpendicular to the axis of the locking leg. It is preferable.

  In the locking tool to the mounting hole according to the present invention, it is preferable that the protrusion extends partway in the radial direction of the umbrella-shaped flange portion.

  In the locking tool for the mounting hole according to the present invention, it is preferable that a plurality of the protrusions are provided at equal angles in the circumferential direction when viewed from the axial direction of the locking leg.

  In the locking tool to the mounting hole according to the present invention, the umbrella-shaped flange portion is formed by a plurality of split molds, and the protrusions are provided so as to be arranged on the split lines of the plurality of split molds. It is preferable to consist of a pair.

  According to the locking tool for the mounting hole according to the present invention, the protrusion formed on the front surface side and / or the back surface side of the umbrella-shaped flange portion increases the resistance force against the elastic deformation of the umbrella-shaped flange portion, and the umbrella It is possible to make it difficult for the flange-shaped flange portion to warp, and to increase the tolerance for fluctuations in the plate thickness of the mounted member due to the elastic deformation of the umbrella-shaped flange portion.

One Embodiment of the locking tool to the attachment hole which concerns on this invention is shown, (a) is the perspective view, (b) is a perspective view at the time of seeing from the direction different from (a). It is a perspective view of the state which fractured a part of the locking implement. FIG. 3 is a plan view of FIG. 2. It is sectional drawing in the AB arrow line of FIG. (A) is explanatory drawing of the state which attached the fastener to the attachment hole which concerns on this invention to the attachment hole, (b) is sectional drawing in the AA arrow line of (a). (A) is explanatory drawing of the state which attached the said locking tool to the to-be-attached member thicker than FIG. 5, (b) is sectional drawing in the BB arrow line of (a).

  Hereinafter, with reference to the drawings, an embodiment of a locking tool for a mounting hole according to the present invention will be described.

  As shown in FIGS. 1, 5, and 6, for example, a locking tool 10 (hereinafter simply referred to as “locking tool 10”) to the mounting hole is inserted into the mounting hole 3 formed in the mounted member 1. It is inserted and attached, and is used to attach the attachment member 5 to the attached member 1. The mounting member 5 is provided with a mounting seat 7 for mounting a locking tool having a frame shape and an insertion groove 8 at the bottom (see FIGS. 5 and 6).

  Examples of the mounting member 5 include a kicking plate, a trim board, a garnish, an assist grip, a bumper, and a lamp. Examples of the mounted member 1 include a vehicle body panel and a vehicle body frame. It is not limited to.

  The locking device according to the present invention may be used not only for the above-mentioned use but also for closing the mounting hole (so-called hole plug), and is not particularly limited.

  As shown in FIG. 1, the locking tool 10 is extended from the umbrella-shaped flange portion 30 that comes into contact with the front peripheral edge of the mounting hole 3 of the mounted member 1, and from the back side of the umbrella-shaped flange portion 30. A locking leg 40 is provided which is inserted into the mounting hole 3 and engages with the back side edge portion thereof.

  As shown in FIGS. 1, 5, and 6, the locking leg 40 includes a column portion 41 that extends from the central portion on the back side of the umbrella-shaped flange portion 30 and an outer periphery of the column portion 41. And a plurality of engaging pieces 43.

  In the present invention, the “back surface” of the umbrella-shaped flange portion means a surface on the attachment hole side in a state where the locking member is attached to the attached member, and the “surface” of the umbrella-shaped flange portion. Means the surface opposite to the mounting hole in the same state (the same meaning is used in the following description).

  Furthermore, a guide head 45 having a diameter larger than that of the column portion 41 and having a diameter reduced in a tapered shape toward the tip side is provided on the distal end side of the column portion 41. The guide head 45 has the same structure as that described in Japanese Patent Application No. 2008-200026 (Japanese Patent Laid-Open No. 2009-281581) by the present applicant.

  Further, the end of each engagement piece 43 on the umbrella-shaped flange portion 30 side forms a stepped engagement portion 43 a, so that the engagement portion 43 a engages with the rear side periphery of the mounting hole 3. (See FIGS. 5 and 6).

  In addition, as the said locking leg 40, it is good also as a structure etc. which consist of a stem part and the locking piece extended from the front-end | tip in the shape of a foot, for example, if it can engage with the attachment hole 3, especially. There is no limitation.

  As shown in FIG. 1 and FIGS. 4 to 6, the locking tool 10 includes a cylindrical shaft portion 20 (not shown but of the mounting seat 7) that is inserted into the insertion groove 8 of the mounting seat 7 of the mounting member 5. At the end, there is an opening of the insertion groove 8, from which the shaft portion 20 is inserted), a disc-shaped first flange portion 21 extending from the outer periphery of the tip of the shaft portion 20, A thin disc-shaped second flange portion 22 extending from the outer periphery of the shaft portion 20 at a predetermined position in the axial direction is provided. Then, the shaft portion 20 of the locking tool 10 is inserted into the insertion groove 8 of the mounting seat 7, and the mounting seat 7 is sandwiched between the first flange portion 21 and the second flange portion 22, so that the locking seat is attached to the mounting seat 7. 10 is mounted (see FIGS. 5 and 6).

  The shaft portion 20 may have a rectangular tube shape, a columnar shape, or the like, and the first flange portion 21 and the second flange portion 22 may have a rectangular plate shape, an oval shape, or the like. Not.

  As shown in FIGS. 2 to 6, the umbrella-shaped flange portion 30 includes a base portion 31 that is a portion continuously provided on the back surface side of the second flange portion 22, and a locking portion from the periphery of the base portion 31. The skirt portion 32 extends so as to spread in an umbrella shape obliquely outward toward the leg 40 side.

  In addition, the said shape of the locking tool 10 is an example to the last, and is not specifically limited. For example, when used as a hole plug or the like, the first flange portion 21 and the second flange portion 22 may not be provided. In this case, the upper surface of the umbrella-shaped flange portion 30 is curved or planar. The portion to which the locking leg 40 is connected becomes the base 31.

  As shown in FIG. 4, the back surface of the skirt portion 32 of the umbrella-shaped flange portion 30 in this embodiment has an angle θ of 15 to 30 ° with respect to a surface F perpendicular to the axis C of the locking leg 40. It is preferable that it is formed so that. The angle θ is more preferably 17 to 25 °.

  When the angle θ is less than 15 °, the amount of deformation of the umbrella-shaped flange portion 30 is reduced, and it becomes difficult to absorb fluctuations in the plate thickness of the mounted member 1, dimensional errors of the locking legs of the locking tool 10, and the like. . On the other hand, when the angle θ exceeds 30 °, when the umbrella-shaped flange portion 30 is forcibly removed from the plurality of divided molds (when the undercut shape is removed), the umbrella-shaped flange portion 30 becomes the mold. It becomes easy to catch and it becomes difficult to come off, and the moldability decreases.

  By the way, as shown by the imaginary line in FIG. 4, when the umbrella-shaped flange portion 30 is strongly pressed from the back surface, the umbrella-shaped flange portion 30 warps in the opposite direction to the inclined direction. The portion P serving as a fulcrum is defined as a “warping back fulcrum” in the present invention. In many cases, the warping fulcrum P is a boundary portion between the base portion 31 and the skirt portion 32 or a portion slightly outside the boundary portion, but is a connecting portion between the umbrella-shaped flange portion 30 and the second flange portion 22. And the shape of the connecting portion between the umbrella-shaped flange portion 30 and the locking leg 40. However, when the umbrella-shaped flange portion 30 is strongly pressed from the back surface and warped, it can be determined as a position that becomes a fulcrum of bending, so that the position can be clearly confirmed.

  And, as shown in FIGS. 2 to 4, the present invention provides an outer diameter of the umbrella-shaped flange portion 30 from a position on the front surface side and / or back surface side of the umbrella-shaped flange portion 30 and including the warping fulcrum P. A protrusion 35 extending toward the side is provided. The protrusion 35 increases resistance to the elastic deformation of the umbrella-shaped flange 30 and makes it difficult for the umbrella-shaped flange 30 to warp.

  In this embodiment, it is on the surface side of the umbrella-shaped flange portion 30 and extends toward the outer diameter side of the umbrella-shaped flange portion 30 from a location opposite to the outer peripheral edge of the base portion 31 including the warping fulcrum P. A pair of protrusions 35 are provided.

  Further, in the present invention, the umbrella-shaped flange portion “warps back” means that when the umbrella-shaped flange portion 30 is pressed, the umbrella-shaped flange portion 30 passes through the base portion 31 of the umbrella-shaped flange portion 30 and is perpendicular to the axis C of the locking leg 40. That the skirt portion 32 of the umbrella-shaped flange portion 30 is curved toward the surface side with respect to the flat surface F, in other words, the skirt portion 32 is curved so as to be inclined to the opposite side to the inclination direction at the time of molding. (See the imaginary line in FIG. 4).

  In addition, as shown in FIG. 3, the umbrella-shaped flange portion 30 in this embodiment is a pair that approaches and separates from each other via a dividing line PL that is linearly arranged so as to pass through the axis C of the locking leg 40. The split molds M1, M2 are injection-molded, and the pair of protrusions 35, 35 are arranged on the split line PL.

  In this embodiment, a pair of protrusions 35 are provided at an equal angle in the circumferential direction (180 ° in this case) when viewed from the axial direction of the locking leg 40. Three protrusions (at intervals of 120 °), four protrusions (at intervals of 90 °), or a larger number of protrusions may be provided.

  In this embodiment, the umbrella-shaped flange portion 30 is formed from a pair of split molds M1, M2 that are close to and away from the linear split line PL, but the mold structure is an example. The number of division types may be increased (three divisions, four divisions, etc.), and is not particularly limited.

  Each protrusion 35 in this embodiment has a wide base portion near the shaft portion 20 as viewed from the axial direction of the locking leg 40 and is gradually narrowed toward the outer diameter side of the umbrella-shaped flange portion 30. The front end portion 35a extends so as to reach almost the center in the radial direction of the umbrella-shaped flange portion 30 (see FIGS. 2 and 3), and the protrusion 35 from the surface side of the umbrella-shaped flange portion 30 is extended. The height is high on the base side near the shaft portion 20, and is formed so as to gradually become lower toward the outer diameter side of the umbrella-shaped flange portion 30 (see FIGS. 2 and 4), and the protrusion 35 is substantially omitted as a whole. It has a beak shape. Further, as shown in FIGS. 2 and 3, both side portions of each protrusion 35 have an arcuate shape corresponding to the shape of the umbrella-shaped flange portion 30 having an umbrella shape.

  In addition, although the width | variety of the protrusion 35 is made narrow gradually toward the outer-diameter side of the umbrella-shaped flange part 30, it is good also as a narrow shape in steps. Moreover, although the height of the protrusion 35 is formed gradually lower toward the outer diameter side of the umbrella-shaped flange portion 30, it may be formed so as to decrease stepwise. Further, the length of the protrusion 35 only needs to extend to the middle of the umbrella-shaped flange portion 30 in the radial direction. For example, the length of the protrusion 35 is shorter than the protrusion 35 shown in FIG. You may make it extend long to the position to do.

  The shape of the protrusion 35 is only an example. For example, the protrusion 35 may be a strip-shaped (stripe-shaped) protrusion that extends in the axial direction with a constant width, a long, rib-shaped protrusion, or a rectangular protrusion having a predetermined width. There is no particular limitation.

  As shown in FIG. 4, the projecting portion 35 is a second flange portion in which the base portion, the tip portion 35 a, and the intermediate portion between the base portion and the tip portion 35 a are arranged adjacent to the umbrella-like flange portion 30. In this structure, the umbrella-shaped flange portion 30 is allowed to be elastically deformed. In this respect, like the synthetic resin retainer of Patent Document 1, a space between the back flange portion and the cap base portion of the seal flange portion is extended by a plurality of ribs, thereby preventing the cap base portion from being deformed. The structure is different.

  Next, a method of using the locking tool having the above structure and an operation effect will be described.

  As shown in FIG. 3, the umbrella-shaped flange portion 30 of the locking tool 10 is injection-molded by a pair of split molds M1, M2 that are close to and away from each other via a split line PL. Further, a pair of protrusions 35 on the surface side of the umbrella-shaped flange portion 30 are arranged on the dividing line PL.

  Therefore, after the synthetic resin is injected with the split molds M1 and M2 closed, the split molds M1 and M2 are separated via the split line PL to forcibly remove the undercut shape of the umbrella-shaped flange portion 30. Moreover, since it can prevent that the protrusions 35 and 35 are arrange | positioned in a die cutting direction, die cutting can be performed easily.

  Then, as described above, the shaft portion 20 of the locking tool 10 is inserted into the insertion groove 8 of the mounting seat 7, and the mounting seat 7 is sandwiched between the first flange portion 21 and the second flange portion 22, After mounting the locking tool 10, the locking leg 40 is inserted into the mounting hole 3 of the mounted member 1 from the front side.

  Then, the plurality of engaging pieces 43 of the locking leg 40 are pressed against the inner periphery of the mounting hole 3 and pass inward while being bent inward. As shown in b), the engaging portion 43a engages with the rear side peripheral portion of the attachment hole 3, and the peripheral portion of the skirt portion 32 of the umbrella-shaped flange portion 30 on the front side peripheral portion of the attachment hole 3 of the attached member 1. Can be attached, and the attachment member 5 can be attached to the attached member 1.

  At this time, as shown in FIGS. 6A and 6B, the thickness of the mounted member 1 varies (in FIG. 6, it is thicker than the mounted member 1 of FIG. 5), or Even if the dimensional variation of the locking leg 40 occurs, the umbrella-shaped flange portion 30 is elastically deformed as appropriate. Here, as shown in FIG. 6, compared to the case shown in FIG. 5, the skirt portion 32 of the umbrella-shaped flange portion 30 is elastically deformed so as to be flattened more flatly. It is possible to absorb dimensional variations and the like of the stop leg 40 and to increase the tolerance for the plate thickness variation of the mounted member 1. As a result, the locking tool 10 can be attached to the attachment hole 3 without rattling, and as a result, the attachment member 5 can be stably attached to the member 1 to be attached.

  Further, when the outer diameter of the umbrella-shaped flange portion 30 of the locking tool 10 is regulated, if the tolerance for variation in the plate thickness of the mounted member 1 is to be increased, the locking of the umbrella-shaped flange portion 30 is prevented. It is necessary to increase the angle with respect to the surface F perpendicular to the axis C of the leg 40, thereby increasing the height of the umbrella-shaped flange portion 30 from the surface side of the mounted member 1.

  In this case, when the locking tool 10 is used, for example, for mounting a kicking plate or the like disposed at the foot of an automobile, if an excessive pressing force acts on the back side of the umbrella-shaped flange 30, the umbrella-shaped flange The stress concentrates on the connection portion of the base portion 31 and the skirt portion 32 of the skirt portion 32 or slightly on the outer periphery thereof, and the portion becomes a warping fulcrum P, and the umbrella-shaped flange portion 30 warps as shown by an imaginary line in FIG. There is a possibility that.

  However, in this locking tool 10, since the protrusion 35 extending toward the outer diameter side of the umbrella-shaped flange 30 from the position including the warping fulcrum P on the surface side of the umbrella-shaped flange 30 is provided. The resistance force against the elastic deformation of the umbrella-shaped flange portion 30 can be increased, and the warpage of the umbrella-shaped flange portion 30 can be made difficult to occur.

  Further, in this embodiment, as shown in FIG. 3, the protrusion 35 is formed so as to become gradually narrower toward the outer diameter side of the umbrella-shaped flange portion 30 when viewed from the axial direction of the locking leg 40. Accordingly, it is possible to effectively prevent the umbrella-shaped flange portion 30 from warping while maintaining the flexibility of the peripheral edge portion of the umbrella-shaped flange portion 30.

  Furthermore, in this embodiment, as shown in FIG. 4, the protrusion 35 is formed such that the height from the surface side of the umbrella-shaped flange portion 30 gradually decreases toward the outer diameter side of the umbrella-shaped flange portion 30. Accordingly, it is possible to effectively prevent the umbrella-shaped flange portion 30 from warping while maintaining the flexibility of the peripheral edge portion of the umbrella-shaped flange portion 30.

  Further, when the back surface of the umbrella-shaped flange portion 30 is formed to have an angle θ of 15 to 30 ° with respect to a surface F perpendicular to the axis C of the locking leg 40 (see FIG. 4). ), A large amount of elastic deformation of the umbrella-shaped flange portion 30 can be ensured, and variations in the plate thickness of the mounted member 1 and dimensional variations of the locking legs 40 can be absorbed more effectively.

  Furthermore, in this embodiment, since the protrusion 35 extends halfway in the radial direction of the umbrella-shaped flange portion 30, the flexibility of the peripheral portion of the umbrella-shaped flange portion 30 is maintained, and the umbrella-shaped flange portion 30 It is possible to make it difficult for warping to occur effectively.

  Further, in this embodiment, since the plurality of protrusions 35 are provided at equal angles in the circumferential direction when viewed from the axial direction of the locking leg 40, the umbrella-shaped flange portion 30 is pushed and warped. The plurality of protrusions 35 can make it difficult to get up in a balanced manner.

DESCRIPTION OF SYMBOLS 1 Mounted member 3 Mounting hole 10 Locking tool (locking tool) to mounting hole
20 Shaft portion 21 First flange portion 22 Second flange portion 30 Umbrella-shaped flange portion 35 Projection portion 40 Locking leg 41 Column portion 43 Engagement piece 45 Guide head portions M1, M2 Split type PL Dividing line

Claims (7)

An umbrella-shaped flange portion that comes into contact with the peripheral edge of the mounting hole of the mounted member;
A locking leg that extends from the back surface of the umbrella-shaped flange portion, is inserted into the mounting hole, and engages with the back side edge portion;
From the position on the front surface side and / or the back surface side of the umbrella-shaped flange portion, including a warping fulcrum when the umbrella-shaped flange portion is pressed and warped from the back surface side, toward the outer diameter side of the umbrella-shaped flange portion. A locking tool for an attachment hole, characterized by being provided with a protrusion that extends and increases resistance to elastic deformation of the umbrella-shaped flange portion.   The locking tool for the mounting hole according to claim 1, wherein the protrusion is formed so as to become narrower toward an outer diameter side of the umbrella-shaped flange portion when viewed from an axial direction of the locking leg. .   The engagement with the mounting hole according to claim 1 or 2, wherein the protrusion is formed such that a height from the surface side of the umbrella-shaped flange portion decreases toward an outer diameter side of the umbrella-shaped flange portion. Stopper.   The said umbrella-shaped flange part is formed so that the back surface may become 15-30 degrees with respect to a surface perpendicular | vertical to the axial center of the said locking leg. Locking tool to the mounting hole.   The said protrusion is a locking tool to the attachment hole as described in any one of Claims 1-4 extended to the middle of the radial direction of the said umbrella-shaped flange part.   The said protrusion is the locking tool to the attachment hole as described in any one of Claims 1-5 provided with the equal angle in the circumferential direction seeing from the axial direction of the said locking leg.   The said umbrella-shaped flange part is shape | molded by the some division | segmentation type | mold, and the said protrusion consists of a pair of things provided so that it might be arrange | positioned on the division line of a some division | segmentation type | mold. The latch to the attachment hole as described in any one.