JP6663709B2 - Fastener - Google Patents

Description

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

  When attaching a harness or a hose to a vehicle body panel, a fastener is used. Patent Document 1 discloses a clip that is attached to a mounting hole of a vehicle body while holding a strap extending from a fuel cap.

  The clip disclosed in Patent Literature 1 includes a base for holding a strap, a shaft extending from the base and inserted into the mounting hole, a pair of locking legs extending from the tip of the shaft toward the base, and a shaft. And a pair of locking pieces extending toward the base from the front end. The pair of locking pieces are curved such that the free ends approach the shaft.

International Publication No. 2009/093496

  In the clip disclosed in Patent Literature 1, the pair of locking legs and the pair of locking pieces have free ends, so that the clip is easily bent in a direction approaching the shaft when inserted into the mounting hole. On the other hand, when a load for pulling out from the mounting hole is input to the clip, the pair of locking legs and the pair of locking pieces are easily bent in a direction approaching the shaft portion, and the locking to the mounting hole is easily released.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a fastener which is hard to be detached from an attachment hole while suppressing an increase in insertion force into the attachment hole.

  In order to solve the above problem, a fastener according to an aspect of the present invention includes a head having a flange, a column formed on the back surface of the head, and a column extending from the column toward the flange. A pair of elastic legs opposed to each other with the portion interposed therebetween; and a pair of protrusions extending from respective inner surfaces of the pair of elastic legs toward the distal end of the pillar. The elastic leg has a locking portion on the outer surface on the free end side for locking to the back edge of the mounting hole. The locking portion has a maximum projecting portion of the elastic leg that protrudes most in the direction in which the elastic leg expands. The column has a sliding surface on which the protrusion can slide inside the elastic leg. The protruding part is separated from the sliding surface in a free state, slides on the sliding surface when inserted into the mounting hole, and abuts on the sliding surface when mounted on the mounting hole to expand the elastic legs. It receives a reaction force including a directional component.

  ADVANTAGE OF THE INVENTION According to this invention, the fastener which is hard to come off from an attachment hole can be provided, suppressing the increase of the insertion force into an attachment hole.

FIG. 1A is a rear view of the fastener, and FIG. 1B is a side view of the fastener. FIG. 2A is a perspective view of the front fastener, and FIG. 2B is a perspective view of the rear fastener. FIG. 3A is a perspective view of the front fastener viewed from below, and FIG. 3B is a perspective view of the side fastener. FIG. 4A is a cross-sectional view taken along line AA of the fastener shown in FIG. FIG. 5A is a diagram illustrating the fastener attached to the second panel, and FIG. 5B is a diagram illustrating the fastener attached to the third panel. FIG. 6A is a view for explaining a state in which a pull-out load is applied to the fastener attached to the first panel, and FIG. 6B is a view illustrating a state attached to the third panel. It is a figure for explaining the state where the pulling load was applied to the fastener.

  FIG. 1A is a rear view of the fastener 10, and FIG. 1B is a side view of the fastener 10. FIG. 2A is a perspective view of the front fastener 10, and FIG. 2B is a rear perspective view. FIG. 3A is a perspective view of the front fastener 10 viewed from below, and FIG. 3B is a perspective view of the side fastener 10.

  The fastener 10 is used for attaching the attaching member to the attached member. For example, the fastener 10 is used for fixing a hose or a harness to a vehicle body panel or an interior panel. That is, a hose or a harness is used as an attachment member, and a vehicle body panel or an interior panel is used as an attached member.

  The fastener 10 has a head 20, a pillar 22, an elastic leg 24, a wall 26, and a protrusion 28. The head 20 has a flange portion 30, a pedestal portion 32, a band portion 34, an insertion hole 36, and a hook portion 38.

  The flange portion 30 is formed in an umbrella shape, protrudes radially outward from the pedestal portion 32, and comes into contact with the surface of the panel when attached to the mounting hole. The band portion 34 extends from the pedestal portion 32 and is formed in a band shape. The insertion hole 36 is formed to penetrate the pedestal portion 32, and the band portion 34 holding the mounting member is inserted.

  The band portion 34 has a plurality of steps 34a along the longitudinal direction. The hook portion 38 is formed in the insertion hole 36 in a claw shape. When the band portion 34 is inserted into the insertion hole 36, one of the step portions 34a is hooked on the hook portion 38 in the insertion hole 36, and the band portion 34 is restricted from coming off from the insertion hole 36 and tightens the mounting member. Can be.

  The column 22 is formed so as to hang down from the back surface of the head 20. The pillar 22 is formed so as to project from the center of the back surface of the head 20. The pillar portion 22 has a sliding surface 48 and a regulating portion 44 on the outer surface.

  When the elastic leg 24 is bent so as to approach the sliding surface 48, the tip of the protrusion 28 contacts and slides. The sliding surface 48 has an inclined surface that protrudes toward the elastic leg portion 24 toward the tip end of the column portion 22. The pillar portion 22 is formed so as to be wider in the direction facing the elastic leg portion 24 toward the distal end side. The base side of the column portion 22 is narrow, and a flexible space for the elastic leg portion 24 is secured.

  The restricting portion 44 is located at the lower end of the sliding surface 48 and protrudes from the sliding surface 48 toward the elastic leg 24, that is, in the opposite direction. The restricting portion 44 restricts sliding of the protruding portion 28 when it comes into contact with the tip of the protruding portion 28.

  The pair of elastic legs 24 are formed so as to be folded from the front end side of the column 22, extend so as to expand toward the flange 30, and face each other with the column 22 interposed therebetween. The pillar 22 supports a pair of elastic legs 24.

  The pair of elastic legs 24 have free ends as shown in FIG. 3A, and can be bent so as to approach or expand in the facing direction, and bend in the approaching direction when inserted into the mounting hole. . The opposing direction refers to the direction in which the pair of elastic legs 24 oppose each other across the column 22, and refers to the bending direction in which the pair of elastic legs 24 approaches or separates.

  The elastic leg portion 24 has a locking portion 40 on the outer surface on the free end side for locking to the back edge of the mounting hole. The locking portion 40 has a curved surface that smoothly curves on the free end side of the elastic leg portion 24, as shown in FIG. 2A, and locks by contacting the back edge of the mounting hole in the mounted state. The curved surface of the locking portion 40 is inclined inward in the facing direction toward the free end. Since the locking portion 40 is smoothly curved, it can be smoothly inserted into the mounting hole, and can be in contact with the back edge of the mounting hole at any position. Therefore, it is possible to cope with a change in the thickness of the mounted member.

  A maximum projecting portion 42 that projects outward from the lower end of the curved surface of the locking portion 40 in the facing direction (in the direction in which the elastic leg portion 24 expands) is formed. The maximum projecting portion 42 projects most in the direction away from the column portion 22 in the elastic leg portion 24, and is formed stepwise from the lower end of the curved surface. The maximum overhang 42 functions as a final stopper for the fastener 10. The direction away from the column 22 is along the expanding direction in which the pair of elastic legs 24 expand.

  The locking portion 40 has a pair of first protrusions 46a and a pair of second protrusions 46b on a curved surface. The pair of first protrusions 46a and the pair of second protrusions 46b (hereinafter referred to as “projections 46” when not distinguishing) are arranged in the longitudinal direction as shown in FIG. It is separated in the width direction, and is not formed at the center portion of the locking portion 40 in the width direction. Thereby, the central part in the width direction of the locking portion 40 is formed to be smoothly curved along the longitudinal direction, and can be smoothly inserted into the mounting hole. The width direction of the elastic leg portion 24 is orthogonal to the direction in which the elastic leg portion 24 faces and the direction in which the column portion 22 hangs.

  The protrusion 46 complements the locking of the locking portion 40 by the curved surface, and is hooked on the back edge of the mounting hole when a load is pulled from the mounting hole to the fastener 10 in the mounted state. When the vehicle vibrates with the fastener 10 in the mounted state, the protrusion 46 can prevent the back edge of the mounting hole from sliding on a curved surface and rattling.

  The pair of wall portions 26 are formed so as to protrude from both side surfaces of the pillar portion 22 as shown in FIG. 2B, and the outer peripheral surfaces are curved along the circular mounting holes. The wall portion 26 increases the rigidity of the column portion 22. The wall 26 is formed so as not to protrude between the elastic leg 24 and the column 22 so as not to prevent the elastic leg 24 from bending.

  The pair of protrusions 28 extend from the respective inner surfaces of the pair of elastic legs 24 toward the distal end of the column 22. The protruding portion 28 extends toward the column portion 22 and extends downward as shown in FIG. 1A, and is inclined obliquely downward. The protrusion 28 is formed in a flat plate shape and has a rounded tip.

  The protruding portion 28 extends from the free end side of the elastic leg portion 24 from the maximum protruding portion 42 as shown in FIG. Thus, the displacement of the protrusion 28 can be increased when the elastic leg 24 bends in the approaching direction, as compared with the case where the protrusion 28 extends from the base side of the elastic leg 24. The tip of the protrusion 28 is located closer to the tip of the column 22 than the maximum overhang 42 and is separated from the slide surface 48 in a free state without external force.

  By positioning the distal end of the protruding portion 28 on the distal end side of the column portion 22 with respect to the maximum overhang portion 42, the protruding portion 28 is formed obliquely downward and long, and displacement according to the bending of the elastic leg portion 24 can be increased. The protruding portion 28 receives a reaction force including a component in a direction of expanding the elastic leg portion 24 from the sliding surface 48 when it comes into contact with the sliding surface 48. Thereby, the locking of the locking portion 40 can be hardly released. The sliding surface 48 is located below the maximum overhang 42, that is, on the tip side of the column 22 from the maximum overhang 42.

  By the way, there is a fastener in which the locking portion of the elastic leg portion is formed as a multi-step claw, and the edge of the mounting hole is locked in any of the steps. It is not clear to the operator at which stage the locking portion of the multi-stage claw is locked, and when the locking is performed at a stage before the desired position, the locking is performed with a low sealing property and a low locking force. Will be. In the fastener 10 of the embodiment, the locking portion 40 is smoothly curved even when the plate thickness of the member to be mounted changes, so that it can be smoothly and sufficiently pushed into the mounting hole, and the step before the desired position can be achieved. It is possible to cope with a change in the plate thickness of the attached member without being locked.

  Also, in the fastener 10 of the embodiment, the elastic leg portion 24 is made to expand by the contact of the protrusion 28 with the sliding surface 48, so that the locking force is exerted even when the thickness of the attached member is small. Is secured. In general fasteners, if the locking force is improved, the insertion force into the mounting hole is also improved, making it difficult to insert. In the fastener 10 of the embodiment, when the protrusion 28 slides on the slide surface 48 while the locking force is improved by the protrusion 28, the protrusion 28 is connected to the slide surface 48. The increase of the insertion force can be suppressed as compared with the case. As described above, the protrusion 28 is slid on the slide surface 48 while the locking force is improved by abutting the slide 28 on the slide surface 48, thereby suppressing an increase in the insertion force into the mounting hole. Can be.

  FIG. 4A is a cross-sectional view taken along line AA of the fastener 10 shown in FIG. In the fastener 10 in the free state, the protruding portion 28 is close to the sliding surface 48 but is separated from the sliding surface 48.

  The inclination angle θ of the protrusion 28 is set in a range from 35 degrees to 50 degrees. Thus, a sufficient reaction force can be transmitted to the locking portion 40 when the protrusion 28 comes into contact with the sliding surface 48. The inclination angle θ of the protrusion 28 is an inclination with respect to the opening surface of the mounting hole, and is an inclination with respect to the facing direction of the pair of elastic legs 24.

  A concave portion 50 is formed on the inner surface of the locking portion 40 at the base of the protruding portion 28. The concave portion 50 is located on the free end side of the maximum overhang portion 42. The portion where the concave portion 50 is formed is thinner and easier to bend than the lower portion of the elastic leg portion 24, so that the base of the protruding portion 28 can be bent and the protruding portion 28 can be largely displaced. Further, the portion where the concave portion 50 is formed is more easily bent than the protruding portion 28. Thereby, the locking portion 40 is elastically brought into contact with the back edge of the mounting hole, so that rattling can be suppressed. The restricting portion 44 is located on the distal end side of the column portion 22 with respect to the maximum overhang portion 42, and the sliding length of the projecting portion 28 is ensured.

  FIG. 4B is a diagram illustrating the fastener 10 attached to the first panel 12. The first panel 12 is the thinnest among the plate thicknesses of the attached members to which the fasteners 10 can be attached. The pair of locking portions 40 is locked in the mounting hole 12a of the first panel 12 at a position close to the free end, and is inclined so as to approach the free end. Is small in the approach direction.

  The attachment of the fastener 10 will be described. The operator grips the pedestal portion 32 and inserts it into the mounting hole 12a from the tip of the pillar portion 22. The pair of elastic legs 24 are bent so as to come into contact with and approach the edge of the mounting hole 12a. When the pair is further pushed in, the maximum overhang portion 42 gets over the mounting hole 12a, and the pair of elastic legs 24 expands. The curved surface of the stop 40 is locked to the back edge of the mounting hole 12a. The flange portion 30 contacts the surface of the first panel 12, and the movement of the mounting hole in the direction perpendicular to the plane is restricted by the flange portion 30 and the locking portion 40.

  In the mounting state shown in FIG. 4B, the protruding portion 28 comes into contact with the sliding surface 48. When the maximum overhang portion 42 passes through the mounting hole 12a from the mounted state, the elastic leg portion 24 is largely bent, and the protruding portion 28 is in contact with the sliding surface 48 during insertion. As described above, the protruding portion 28 is separated from the sliding surface 48 in a free state, slides on the sliding surface 48 when inserted into the mounting hole 12a, and slides on the sliding surface 48 when mounted on the mounting hole 12a. Abut. The sliding of the protrusion 28 can suppress an increase in the insertion force.

  FIG. 5A is a diagram illustrating the fastener 10 attached to the second panel 14. The second panel 14 is larger than the first panel 12 in thickness and about three times as thick as the first panel 12. The locking portion 40 is locked to the back edge of the mounting hole 14a of the second panel 14, and the pair of elastic legs 24 is more flexed and protruded than the state of being mounted on the first panel 12 shown in FIG. The tip of the portion 28 is located closer to the tip of the pillar portion 22 than when it is attached to the first panel 12.

  FIG. 5B is a diagram illustrating the fastener 10 attached to the third panel 16. The third panel 16 is larger than the first panel 12 and the second panel 14 in thickness, and is about twice as thick as the second panel 14. The third panel 16 is a panel having the largest thickness to which the fastener 10 can be attached. The rear edge of the mounting hole 16 a of the third panel 16 is locked to the maximum extension 42 of the locking portion 40.

  The pair of elastic legs 24 is more flexed than the state attached to the second panel 14 shown in FIG. 5A, and the tip of the protruding portion 28 is located closer to the tip of the column 22 than the state attached to the second panel 14. are doing. Since the plate thickness of the third panel 16 is large, the tip of the protruding portion 28 is displaced downward, but is not in contact with the restricting portion 44 and is separated therefrom.

  As the pair of elastic legs 24 bends in the approaching direction, the tip of the projection 28 moves toward the tip of the column 22, and the inclination of the projection 28 changes in the direction along the direction in which the column 22 hangs. The sliding surface 48 is formed so as to expand toward the tip of the column portion 22. Thereby, the contact between the tip of the protrusion 28 and the sliding surface 48 can be maintained.

  Also, by inclining the sliding surface 48, the reaction force in the direction perpendicular to the sliding surface 48 applied to the protrusion 28 has an upward component and a component in the facing direction. Thereby, the locking portion 40 is pushed upward and in the opposite direction to the back edge of the mounting hole, and the rattling of the fastener 10 can be suppressed. When the projection 28 moves toward the tip of the column 22, the inclination of the projection 28 follows the vertical direction. , The component of the reaction force in the facing direction can be suppressed from being reduced.

  FIG. 6A is a view for explaining a state in which a pull-out load is applied to the fastener 10 attached to the first panel 12, and FIG. FIG. 4 is a diagram for explaining a state in which a pulling load is applied to the fastener 10 in a folded state.

  As shown in FIG. 6A, by applying the pulling load F to the fastener 10, the fastener 10 moves upward from the position shown in FIG. The protrusion 42 is hooked. Further, the protruding portion 28 moves to the tip end side of the column portion 22 and abuts on the restricting portion 44 to restrict downward sliding. By restricting the sliding of the protruding portion 28 by the restricting portion 44, the bending of the elastic leg portion 24 in the approaching direction is limited, and the locking of the locking portion 40 can be prevented from being easily released.

  The locking portion 40 is pulled upward and receives a downward reaction force from the back edge of the mounting hole 12a. However, since the protrusion 28 receives an upward reaction force from the regulating portion 44, the pulling load F is generated at two places. Load resistance can be improved. If the pulling load F is excessively increased, the lower end of the elastic leg 24 eventually buckles downward and the locking of the locking portion 40 is released. In addition, even if the lower end of the elastic leg part 24 buckles, the protruding part 28 is configured to hardly bend.

  As shown in FIG. 6B, by applying the pulling load F to the fastener 10, the tip of the protruding portion 28 moves downward and abuts on the regulating portion 44, whereby the sliding is regulated. Thereby, the locking of the locking portion 40 can be hardly released, and the load resistance can be improved. The configuration of the projecting portion 28 and the regulating portion 44 according to the embodiment can improve the load resistance of several tens of Newtons through experiments and the like, as compared with a fastener without the projecting portion 28 and the regulating portion 44.

  As shown in FIG. 6A, in a state where the projection 46 is attached to the thin first panel 12, the protrusion 46 can be caught by the back edge of the attachment hole 12a to restrict the vertical movement, so that rattling can be suppressed.

  When the pull-out load F is removed from the state where the pull-out load F shown in FIG. Return to the original locked position. This allows the flange portion 30 to abut on the first panel 12 and seal again.

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

  In the embodiment, the mode in which the pair of elastic legs 24 is provided is shown. However, the present invention is not limited to this mode. For example, four elastic legs 24 may be provided.

  Further, in the embodiment, the mode in which the fastener 10 attaches the harness to the vehicle body panel is shown, but the present invention is not limited to this mode. For example, the fastener may be used to attach an interior panel to a vehicle body panel, attach a decorative component to an interior panel, or the like. In this modification, a decorative member may be provided integrally with the fastener instead of the band portion 34.

  Further, in the embodiment, the mode in which the locking portion 40 is formed to be smoothly curved is shown. However, the present invention is not limited to this mode, and the locking portion may have a flat inclined surface instead of the curved surface. .

  DESCRIPTION OF SYMBOLS 10 Fastener, 12 1st panel, 12a mounting hole, 14 2nd panel, 14a mounting hole, 16 3rd panel, 16a mounting hole, 20 head, 22 pillar part, 24 elastic leg part, 26 wall part, 28 protrusion Part, 30 flange part, 32 pedestal part, 34 band part, 36 insertion hole, 38 hook part, 40 locking part, 42 maximum extension part, 44 regulating part, 46a first projection part, 46b second projection part, 46 Projections, 48 sliding surfaces, 50 recesses.

Claims (3)

A head having a flange portion,
A pillar formed on the back of the head,
A pair of elastic legs extending from the pillar toward the flange, facing each other with the pillar interposed therebetween,
A pair of protrusions extending from each of the inner surfaces of the pair of elastic legs toward the tip end of the column,
The elastic leg has a locking portion for locking to a back edge of the mounting hole on an outer surface on a free end side,
The locking portion has a maximum projecting portion that protrudes most in the expanding direction of the elastic leg portion in the elastic leg portion,
The pillar has a sliding surface on which the protrusion can slide inside the elastic leg,
The protruding portion extends from the free end side of the elastic leg portion beyond the maximum overhang portion toward the tip end side of the pillar portion from the maximum overhang portion, and extends from the sliding surface in a free state. Separately, slides on the sliding surface when inserted into the mounting hole, and comes into contact with the sliding surface in the state of being mounted on the mounting hole to generate a reaction force including a component in the expanding direction of the elastic leg. A fastener characterized by receiving. A head having a flange portion,
A pillar formed on the back of the head,
A pair of elastic legs extending from the pillar toward the flange, facing each other with the pillar interposed therebetween,
A pair of protrusions extending from each of the inner surfaces of the pair of elastic legs toward the tip end of the column,
The elastic leg has a locking portion for locking to a back edge of the mounting hole on an outer surface on a free end side,
The locking portion has a maximum projecting portion that protrudes most in the expanding direction of the elastic leg portion in the elastic leg portion,
The pillar has a sliding surface on which the protrusion can slide inside the elastic leg,
The sliding surface has an inclined surface that protrudes toward the elastic leg as it goes toward the tip of the pillar,
The protruding portion is separated from the sliding surface in a free state, slides on the sliding surface when inserted into a mounting hole, and abuts on the sliding surface in a mounting state in the mounting hole, thereby causing the elasticity. A fastener which receives a reaction force including a component in a direction in which a leg is expanded. A head having a flange portion,
A pillar formed on the back of the head,
A pair of elastic legs extending from the pillar toward the flange, facing each other with the pillar interposed therebetween,
A pair of protrusions extending from each of the inner surfaces of the pair of elastic legs toward the tip end of the column,
The elastic leg has a locking portion for locking to a back edge of the mounting hole on an outer surface on a free end side,
The locking portion has a maximum projecting portion that protrudes most in the expanding direction of the elastic leg portion in the elastic leg portion,
The pillar portion has a sliding surface on which the protruding portion can slide inside the elastic leg portion, and a regulating portion protruding from the sliding surface toward the elastic leg portion,
The locking portion has a curved surface,
The maximum projecting portion projects from the curved surface in an expanding direction of the elastic leg portion,
The protruding portion is separated from the sliding surface in a free state, slides on the sliding surface when inserted into a mounting hole, and abuts on the sliding surface in a mounting state in the mounting hole, thereby causing the elasticity. Receiving a reaction force that includes the component of the spreading direction of the leg
When a load that is pulled out of the mounting hole is applied to itself in the mounted state, the maximum overhanging portion is caught on an edge of the mounting hole, and the restricting portion contacts the tip of the protruding portion to restrict sliding. Fastener.

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