JP2017009098A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology of suppressing deterioration in extraction force from a fitting hole, even in a case where a fastener is fitted to a relatively large fitting hole.SOLUTION: A fastener 10 fitted into a fitting hole of a fitted member includes: a pair of leg parts 20 having an engagement surface engaged to the hole edge of the fitting hole, and having flexibility in an opposite direction; and a connection part 22 connecting one ends of the pair of leg parts 20. The engagement surface of the leg part 20 has a large inclination angle to the axial direction of the fitting hole in a case of being fitted into a relatively large fitting hole than that in a case of being fitted into a relatively small fitting hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fastener for mounting in a mounting hole.

  Patent Document 1 discloses a wiring clip for fixing a wire harness routed in a vehicle to a panel. The wiring clip is connected to the mounting portion to which the wire harness is fixed, the protruding portion protruding from the mounting portion, the pair of locking pieces extending from the tip of the protruding portion toward the mounting portion, and the pair of locking pieces. And a holding portion that engages with the hole of the panel. The wiring clip is inserted into the hole of the panel from the tip of the protruding portion, and is attached to the hole of the panel by sandwiching the panel between the notch portion and the holding portion of the pair of locking pieces.

JP 2010-96303 A

  By the way, it is desirable that the fastener attached to the attachment hole can be attached to attachment holes of different sizes. In addition, when the fastener is attached to a relatively large attachment hole, it is desirable to suppress a decrease in the removal force from the attachment hole.

  This invention is made | formed in view of such a subject, The objective is providing the technique which suppresses the fall of the extraction force from an attachment hole, when a fastener is attached to a relatively large attachment hole. It is in.

  In order to solve the above-described problem, a fastener according to an aspect of the present invention is a fastener for attaching to an attachment hole of a member to be attached, and has an engagement surface that engages with a hole edge of the attachment hole, A pair of leg portions that can be bent in the facing direction and a connecting portion that connects one ends of the pair of leg portions are provided. When the engagement surface of the leg is attached to a relatively large attachment hole, the inclination angle with respect to the axial direction of the attachment hole is larger than when attached to a relatively small attachment hole.

  Another aspect of the present invention is a fastener attached to the attachment hole of the attached member. This fastener includes an engagement surface that engages with a hole edge of the attachment hole, and includes a pair of leg portions that can be bent in an opposing direction, and a connecting portion that connects one end of the pair of leg portions. The pair of leg portions includes an extending portion that extends inward in the facing direction from the other end side of the engaging surface, and a protruding portion that is bent from the extending portion and projects outward in the facing direction.

  ADVANTAGE OF THE INVENTION According to this invention, when a fastener is attached to a comparatively big attachment hole, the technique which suppresses the fall of the extraction force from an attachment hole can be provided.

It is a perspective view of the fastener of an Example. Fig.2 (a) is a bottom view of a fastener, FIG.2 (b) is sectional drawing of line segment AA of the fastener shown to Fig.2 (a). It is a figure for demonstrating the process of attaching a fastener to a small 1st attachment hole. It is a figure for demonstrating the process of attaching a fastener to a big 2nd attachment hole. It is a figure for demonstrating the fastener of a modification.

  FIG. 1 is a perspective view of a fastener 10 according to an embodiment. FIG. 1A shows a view of the fastener 10 viewed from the front side, and FIG. 1B shows a view of the fastener 10 viewed from the back side.

  The fastener 10 is attached to an attachment hole of a member to be attached such as a vehicle body panel or an interior panel. The fastener 10 may be used for attaching a predetermined attachment member to a member to be attached, and may be used as a hole plug for simply closing the attachment hole in another example. Although an example in which the attachment member is formed integrally with the fastener 10 is shown, as an alternative, the attachment member may be formed separately from the fastener, and the shaft portion of the attachment member may be locked to the fastener. In addition, although the attachment hole in an Example is a rectangular shape, it is not restricted to this aspect, A circular shape may be sufficient.

  The fastener 10 is formed of a resin material and includes a pair of leg portions 20, a connecting portion 22, a shaft portion 24, a flange portion 26, and an attachment portion 28. The attachment portion 28 is a portion connected to the attachment member, and the attachment member is omitted in the drawing. The mounting member is a vehicle-mounted component such as a decorative band for interior or a binding band for fixing a harness.

  The flange portion 26 is formed in a disk shape, projects outward in the radial direction from the shaft portion 24, and is locked to a member to be attached around the attachment hole in the attached state. A mounting portion 28 is continuously provided on the surface of the flange portion 26, and a pair of leg portions 20 and a shaft portion 24 are continuously provided on the back surface 26a.

  The shaft portion 24 is formed in a prismatic shape and hangs down from the back surface 26 a of the flange portion 26. The connecting portion 22 connects one end of the pair of leg portions 20 on the distal end side of the shaft portion 24.

  The pair of leg portions 20 has an engagement portion 32 that engages with the hole edge on the back side of the attachment hole in the attached state, and can be bent in the opposing direction. A shaft portion 24 is disposed between the pair of leg portions 20. One end of the pair of leg portions 20 is connected to the connecting portion 22, and the other end is connected to the back surface 26 a of the flange portion 26. The direction in which the shaft portion 24 hangs from the flange portion 26 is referred to as the axial direction, the direction in which the pair of leg portions 20 face each other with the shaft portion 24 interposed therebetween is referred to as the facing direction, and the direction orthogonal to the axial direction and the facing direction is referred to as the opposing direction. This is called the width direction. The size of the mounting hole refers to the distance between the pair of leg portions 20 in the mounting state in the facing direction.

  The fastener 10 is inserted into the attachment hole from the connecting portion 22 side, and is attached by sandwiching the attached member between the flange portion 26 and the engaging portion 32 of the leg portion 20. Each configuration of the fastener 10 will be described in detail with reference to a new drawing.

  Fig.2 (a) is a bottom view of the fastener 10, FIG.2 (b) is sectional drawing of line segment AA of the fastener 10 shown to Fig.2 (a). Here, the same or equivalent components and members shown in the drawings are denoted by the same reference numerals, and repeated description thereof is omitted as appropriate.

  As shown in FIG. 2A, the shaft portion 24 is formed larger in the width direction than the leg portion 20. Thereby, the shaft part 24 can restrict | limit the movement of the width direction, when inserting in an attachment hole.

  As shown in FIG. 2B, the leg portion 20 has an expanded portion 30, an engaging portion 32, an extending portion 34, an overhanging portion 40, and a coupling portion 44. The pair of expanded portions 30 expand so that the interval in the facing direction increases from the connecting portion 22 toward the flange portion 26. The expanding portion 30 extends away from the shaft portion 24 as it goes from the connecting portion 22 toward the flange portion 26.

  The engaging part 32 has an engaging surface 32a that is bent inward in the opposing direction from the tip of the expanding part 30 and engages with the hole edge on the back side of the mounting hole on the outer surface. The engaging surface 32 a is inclined so as to approach the shaft portion 24 from the expanded portion 30 toward the flange portion 26. In the leg part 20, the front-end | tip of the expansion part 30, ie, the lower end of the engaging part 32, protrudes the largest in the opposing direction outward.

  The extending part 34 is bent from the tip of the engaging part 32 and extends inward in the opposing direction. The extending part 34 extends in a direction approaching the shaft part 24 from the other end side of the leg part 20 of the engaging surface 32a. The extension part 34 has a recess 36 and a first contact part 38. The recessed part 36 is formed in the inner surface of the leg part 20 which continues from the inner surface of the expanded part 30 so that the extending part 34 becomes thin. The recessed portion 36 makes it easy to bend the extending portion 34 so as to bend toward the flange portion 26 at the position of the recessed portion 36. The concave portion 36 is continuously provided from the inner surface of the engaging portion 32, and when the extending portion 34 is bent upward in the concave portion 36, an acute angle inclination with respect to the axial direction of the engaging surface 32 a in the engaging portion 32 is generated. Get smaller.

  The first abutting portion 38 is formed to project inward in the opposing direction, and can abut on the shaft portion 24 in a state where the pair of leg portions 20 is bent inward in the opposing direction. The first contact portion 38 can suppress the inward movement of the engaging portion 32 in the opposite direction by contacting the shaft portion 24.

  The overhanging portion 40 is formed so as to be bent away from the middle of the upper surface of the extending portion 34 in the axial direction, that is, away from the other end of the leg portion 20, and away from the axial portion 24, that is, outside the opposing direction Overhang in the direction. The overhanging portion 40 is opposed to the extending portion 34 in the axial direction and is formed substantially parallel to the extending portion 34. The axial distance between the overhanging portion 40 and the extending portion 34 is set to be smaller than the axial length of the mounting hole, and the overhanging when the engaging portion 32 comes into contact with the hole edge on the back side of the mounting hole. The part 40 is set so as to be located inside the mounting hole. The overhanging portion 40 has a second abutting portion 42 that can abut against the inner surface of the attachment hole in the attached state. The second contact portion 42 is located at the front end of the overhanging portion 40 in the opposing direction, is located inward of the lower end of the engaging portion 32 and the front end of the expanding portion 30, and is in the opposing direction, and in the axial direction, the engaging surface 32a. Position to overlap.

  The coupling portion 44 is bent from the tip of the overhang portion 40, is located on the inner side in the opposing direction from the second contact portion 42, and is coupled to the back surface 26 a of the flange portion 26. The coupling portion 44 is inclined with respect to the axial direction. By connecting the leg part 20 to the flange part 26, the durability of the leg part 20 increases, and the fastener 10 can be removed from the mounting hole and used again.

  The restricting portion 46 is formed to protrude from the flange portion 26 and / or the shaft portion 24 at the base of the shaft portion 24, and restricts the axially upward movement of the first contact portion 38, that is, the movement toward the flange portion 26. .

  By the way, the fastener 10 of an Example may be attached to the attachment hole of the to-be-attached member of a different magnitude | size and different board thickness by the difference in a vehicle model etc. When the conventional fastener as disclosed in Patent Document 1 is attached to a relatively small attachment hole, the bending amount of the pair of leg portions is increased, and the inclination angle of the engagement surface with respect to the axial direction of the attachment hole is increased. The engagement surface becomes perpendicular to the axial direction, and the removal force from the mounting hole is increased. On the other hand, when the conventional fastener is attached to a relatively large attachment hole, the bending amount of the pair of leg portions is reduced, the inclination angle of the attachment surface with respect to the axial direction of the attachment hole is reduced, and the engagement surface is pivoted. The pulling force from the mounting hole is reduced along the direction. Thus, when a conventional fastener is attached to a relatively large attachment hole, the removal force may be reduced. Further, there is a method of further expanding the pair of leg portions in order to cope with different sizes of the mounting holes, but the insertion force increases as the pair of leg portions is expanded. As another method, there is a method of increasing the removal force by increasing the inclination angle of the engagement surface of the fastener with respect to the axial direction of the mounting hole in a free state, but this method copes with a change in the plate thickness of the mounted member. It becomes difficult.

  Therefore, the fastener 10 of the embodiment is configured such that the inclination angle of the engagement surface 32a changes according to the size of the mounting hole so as to suppress a decrease in the extraction force when the fastener 10 is mounted in a large mounting hole. The effect | action of this fastener 10 is demonstrated in detail with reference to a new drawing.

  FIG. 3 is a diagram for explaining a process of attaching the fastener 10 to the small first attachment hole 12a. FIG. 3A shows the fastener 10 being inserted into the first attachment hole 12a, and FIG. 3B shows the fastener 10 in a state where the attachment has been completed in the first attachment hole 12a.

  When the fastener 10 shown in FIG. 3 (a) is pushed in from the connecting portion 22 side, the first mounting hole 12a is relatively small, so that the pair of leg portions 20 abut against the inner surface of the first mounting hole 12a. The first abutting portion 38 abuts against the shaft portion 24 and the approach of each other is limited.

  Further, the pair of leg portions 20 is bent upward in the axial direction, that is, toward the flange portion 26 due to friction with the inner surface of the first mounting hole 12a, and the extending portion 34 is separated from the projecting portion 40 in the axial direction. Therefore, the extending portion 34 is bent upward at the concave portion 36. Since the extending portion 34 bends upward at the concave portion 36, the engaging portion 32 moves to the shaft portion 24 side, and the inclination angle with respect to the axial direction of the engaging surface 32a is reduced, so that the insertion resistance is reduced. Can do. The extension portion 34 is preferably formed so as not to come into contact with the overhanging portion 40 at the time of insertion from the viewpoint of reducing insertion resistance, but may be in contact. When the first abutting portion 38 abuts on the restricting portion 46, the engaging portion 32 moves too much in the axial direction, and the engaging portion 32 is difficult to be caught by the hole edge on the back side of the first mounting hole 12a. Can be suppressed.

  As shown in FIG. 3B, in the mounted state, the engaging surface 32a engages with the hole edge on the back side of the first mounting hole 12a, the first contact portion 38 contacts the shaft portion 24, and the second contact. The contact portion 42 is in contact with the inner surface of the first mounting hole 12a.

  Since the first mounting hole 12a is relatively small, the engagement surface 32a receives a large load inward in the opposing direction as compared to a relatively large mounting hole. An inward force in the opposing direction is transmitted from the engaging surface 32a to the extending portion 34, and the first abutting portion 38 contacts the shaft portion 24 and restricts the inward movement of the engaging surface 32a in the opposing direction. By restricting the inward movement of the engagement surface 32a, the removal force of the fastener 10 can be increased.

  When the engaging surface 32a engages with the hole edge of the first mounting hole 12a and receives an inward force in the opposing direction, the expanding portion 30 and the overhanging portion 40 have a force to expand outward in the opposing direction. The second contact portion 42 of the overhang portion 40 contacts the inner surface of the first mounting hole 12a. As a result, the inward force in the opposing direction that the overhanging portion 40 receives from the inner surface of the first mounting hole 12 a is transmitted to the extending portion 34 and becomes a force that bends at the recess 36. Since the recessed portion 36 of the extending portion 34 is more easily bent than the protruding portion 40, the inward force that the engaging surface 32 a and the second contact portion 42 receive is bent mainly at the recessed portion 36. It becomes the power to make. The first inclined angle θ1 with respect to the axial direction of the engagement surface 32a is determined by the bending of the extending portion 34. The second abutting portion 42 abuts against the inner surface of the first mounting hole 12a, so that the overhanging portion 40 is prevented from bulging, and the concave portion 36 is further bent to make the first inclined angle of the engaging surface 32a. θ1 can be determined.

  When a force for pulling the fastener 10 out of the first attachment hole 12a is applied, the first inclination angle θ1 of the engagement surface 32a can be stabilized by the contact between the first contact portion 38 and the limiting portion 46, As compared with the case where the 1 contact part 38 and the overhang | projection part 40 do not contact | abut, it can be hard to come off.

  FIG. 4 is a diagram for explaining a process of attaching the fastener 10 to the large second attachment hole 12b. FIG. 3A shows the fastener 10 being inserted into the second attachment hole 12b, and FIG. 3B shows the fastener 10 in a state where the attachment has been completed in the second attachment hole 12b. The size of the second mounting hole 12b in the facing direction when the fastener 10 is mounted is larger than the first mounting hole 12a.

  As shown in FIG. 4A, since the second mounting hole 12b is larger than the first mounting hole 12a, the bending inward of the leg 20 in the opposite direction is smaller than the leg 20 shown in FIG. However, since the bending of the recess 36 shown in FIG. 4A is smaller than the extension 34 shown in FIG. 3A, the required insertion force in the second mounting hole 12b is the first mounting hole 12a. It is possible to set to the same level as the insertion force. Thereby, even if the magnitude | size of an attachment hole changes, the fastener 10 can be designed so that insertion with a desired insertion force is possible.

  As shown in FIG. 4B, in the mounted state, the engaging surface 32a is engaged with the hole edge on the back side of the second mounting hole 12b, the first contact portion 38 is not in contact with the shaft portion 24, The two contact portions 42 are not in contact with the inner surface of the first mounting hole 12a.

  Since the second mounting hole 12b is relatively large, the load received by the engagement surface 32a inward in the facing direction is smaller than that of the relatively small first mounting hole 12a. Further, since the first abutting portion 38 and the second abutting portion 42 are not in contact with each other, the bending of the concave portion 36 is reduced, and the second inclination angle θ2 with respect to the axial direction of the engaging surface 32a is shown in FIG. It becomes larger than the first inclination angle θ1 in the first mounting hole 12a shown in FIG. The first inclination angle θ1 and the second inclination angle θ2 are inclination angles at which the engagement surface 32a is acute with respect to the axial direction.

  Here, the larger the angle of inclination of the engaging surface 32a with respect to the axial direction, the larger the pulling force, and the smaller the angle of inclination of the engaging surface 32a with respect to the axial direction, the smaller the pulling force because the engaging surface 32a follows the pulling direction. . When the engagement surface 32a is attached to the relatively large second attachment hole 12b, the inclination angle of the attachment hole with respect to the axial direction is larger than when attached to the relatively small first attachment hole 12a. Thereby, since the fastener 10 is comprised so that the inclination | tilt angle with respect to the axial direction of the engagement surface 32a may become large, so that the magnitude | size of an attachment hole becomes large, it can suppress that extraction force falls.

  In addition, when it attaches to the relatively small 1st attachment hole 12a, the inclination angle with respect to the axial direction of the engaging surface 32a becomes small. However, as the size of the attachment hole becomes smaller, the pair of leg portions 20 are located in the opposite direction. Since the pair of leg portions 20 is flexibly bent in the direction, a large force acts outwardly in the opposite direction so that the pair of leg portions 20 is elastically restored, and a decrease in the extraction force is suppressed. Moreover, since the inclination angle θ with respect to the axial direction of the engagement surface 32a becomes smaller as the size of the mounting hole becomes smaller, it is possible to suppress the removal force from becoming too large to be easily removed when reused. It is also possible to design the fastener 10 to a desired removal force while suppressing a change in the removal force due to the change of the above.

  4th inclination angle (theta) 4 of the inner surface side of the engaging part 32 and the expansion part 30 in the attachment state to the 2nd attachment hole 12b shown in FIG.4 (b) is to the 1st attachment hole 12a shown in FIG.3 (b). The engagement portion 32 and the expansion portion 30 in the attached state are configured to be smaller than the third inclination angle θ3 on the inner surface side. Thereby, when attaching the fastener 10 to the big 2nd attachment hole 12b, the inclination | tilt angle with respect to the axial direction of the engaging surface 32a can be enlarged, and extraction force can be raised. The minimum facing interval in the axial direction between the overhanging portion 40 and the extending portion 34 in the attached state is the first distance shown in FIG. 3B than the interval H2 when attached to the second attachment hole 12b shown in FIG. The interval H1 when attached to the first attachment hole 12a is smaller, and the overhanging portion 40 and the extension portion 34 are greatly bent in the first attachment hole 12a.

  FIG. 5 is a view for explaining a modified fastener 100. FIG. 5A is a perspective view of the fastener 100, and FIG. 5B is an axial cross-sectional view of the fastener 100 coupled to the shaft portion 14.

  The fastener 100 of the modified example shown in FIG. 5B is different from the fastener 10 shown in FIG. 2B in that the shaft portion 14 is provided separately. The shaft portion 14 is formed so as to protrude in a column shape from the mounting member, and has a locking hole 14 a that is locked to the fastener 100.

  As shown in FIG. 5A, the fastener 100 includes a pair of leg portions 20, a connecting portion 22, a pair of flange portions 52, and a locking portion 50. The locking part 50 is erected from the inner surface of the connecting part 22 or the leg part 20, is formed in a claw shape, and is locked in the locking hole 14 a of the shaft part 14. The flange portion 52 is formed in a flat plate shape, and is connected to the coupling portion 44 at the other end of the leg portion 20 and extends outward in the facing direction. The flange portion 52 is caught by a member to be attached around the attachment hole.

  As shown in FIG. 5B, the shaft portion 14 is disposed between the pair of leg portions 20, and the locking member 14 is locked to the locking portion 50, so that the mounting member and the fastener 100 are integrated. It becomes. Thus, even if the shaft portion 14 is a separate body, the same function as the fastener 10 shown in FIG. 1A can be obtained by locking and integrating with the fastener 100.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added to the embodiments based on the knowledge of those skilled in the art. Examples may also be included within the scope of the present invention.

  In the embodiment, the aspect in which the leg portion 20 is coupled to the back surface 26a of the flange portion 26 is shown, but the present invention is not limited to this aspect. For example, the leg 20 is not coupled to the flange 26 and may have a free end.

  In the embodiment, the embodiment has been described in which the leg portion 20 includes the expanding portion 30, the engaging portion 32, the extending portion 34, the overhanging portion 40, and the coupling portion 44. However, the embodiment is not limited thereto. For example, the leg portion 20 can be formed by removing the overhanging portion 40 from the leg portion 20. In this case, the coupling portion 44 extends from the upper surface of the extending portion 34 toward the flange portion 26 and is coupled to the back surface 26a.

  DESCRIPTION OF SYMBOLS 10 Fastener, 12 to-be-attached member, 12a 1st attachment hole, 12b 2nd attachment hole, 14 shaft part, 14a locking hole, 20 leg part, 22 connection part, 24 shaft part, 26 flange part, 26a back surface, 28 Attachment part, 30 Widening part, 32 Engagement part, 32a Engagement surface, 34 Extension part, 36 Concave part, 38 1st contact part, 40 Overhang part, 42 2nd contact part, 44 Coupling part, 46 Restriction part, 50 locking part, 52 flange part.

Claims (6)

A fastener for attaching to the attachment hole of the attached member,
A pair of legs having an engaging surface that engages with the hole edge of the mounting hole and capable of bending in the opposing direction;
A connecting portion that connects one end of the pair of legs,
The fastener according to claim 1, wherein when the engagement surface is attached to a relatively large attachment hole, an inclination angle with respect to the axial direction of the attachment hole is larger than a case where the engagement surface is attached to a relatively small attachment hole. A columnar shaft is disposed between the pair of legs,
The said leg part is extended in the direction approaching the said axial part from the other end side of the said engagement surface, and has the extended part which can contact | abut to the said axial part. Fastener.   The fastener according to claim 2, wherein the extending portion has a recessed portion that is recessed so as to be thin on the inner surface.   The leg portion has an overhanging portion that is bent away from the extending portion in the axial direction and overhangs in a direction away from the shaft portion, and can contact the inner surface of the attachment hole in the attached state. The fastener according to claim 2 or 3. It further includes a flange portion that is locked to a member to be attached around the attachment hole,
The fastener according to any one of claims 1 to 4, wherein the pair of leg portions has the other end connected to the flange portion. A fastener attached to the attachment hole of the attached member,
A pair of legs having an engagement surface that engages with the hole edge of the mounting hole and capable of bending in the opposite direction;
A connecting portion that connects one end of the pair of legs,
The pair of legs are
An extending portion extending inward in the opposite direction from the other end side of the engagement surface;
And a protruding portion that is bent from the extending portion and protrudes outward in the opposite direction.

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