JP6850170B2 - Fastener - Google Patents

Description

The present invention relates to a fastener for fastening to a mounting hole of a member to be mounted.

Fasteners are used when attaching interior panels, decorative materials, etc. to the body panel of a vehicle (see Patent Document 1). The fasteners disclosed in Patent Document 1 are a disk-shaped head, a main body extending from the head to form an elongated extending member, a plurality of legs engaging with the hole edges of the panel, and the main body. It has a mooring part that is extended and connected to the leg part.

Japanese Unexamined Patent Publication No. 2006-300325

In the technique disclosed in Patent Document 1, the leg portion is connected to the main body portion by a mooring portion to limit the deformation of the leg portion, thereby suppressing excessive deformation of the leg portion when the fastener is pulled out from the mounting hole. The fasteners are reusable. However, by connecting the leg portion to the main body portion by the mooring portion, the leg portion is less likely to bend toward the main body portion, and the insertion resistance when inserting the leg portion into the mounting hole may increase.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a fastener capable of suppressing damage when pulled out from a mounting hole and reducing an insertion force into the mounting hole. ..

In order to solve the above problems, the fastener of a certain aspect of the present invention is a fastener attached to a mounting hole of a member to be mounted, and is a head, a shaft portion extending from the head portion, and a fastener portion extending from the head portion. It includes a leg portion extending toward the head and a connecting portion for connecting the leg portion and the shaft portion. The legs are formed on the base end portion connected to the shaft portion and the outer surface on the tip end side, and are formed on the outer surface between the locking portion which is locked to the edge of the mounting hole and the base end portion and the locking portion. It has a bent portion that bends toward the head side so as to be separated from the shaft portion. The connecting portion is connected to the leg portion between the base end portion and the locking portion.

According to the present invention, it is possible to provide a fastener capable of suppressing damage when pulling out from the mounting hole and reducing the insertion force into the mounting hole.

1 (a) and 1 (b) are perspective views of the fastener, which are viewed from different directions. It is a figure which shows the line segment AA cross section of the fastener shown in FIG. It is a figure for demonstrating the operation of the fastener when attaching the fastener to the attachment hole of the attached member. It is a figure for demonstrating the operation of the fastener when pulling out a fastener from a mounting hole.

1 (a) and 1 (b) are perspective views of the fastener 10, which are viewed from different directions. The fastener 10 is used to attach the attachment member to the attached member or to fasten the attachment member to the attached member. For example, the fastener 10 is used to attach an interior panel to a vehicle body panel, to attach a decorative part to the interior panel, and the like.

The fastener 10 includes a head 20, a shaft portion 22, a leg portion 24, and a connecting portion 26. The head 20 has a first mounting portion 32, a second mounting portion 34, and a flange portion 36. The first mounting portion 32 and the second mounting portion 34 are each formed in a disk shape and face each other in the axial direction. The first mounting portion 32 is inserted into the insertion hole of the interior panel and sandwiches the hole edge of the interior panel together with the second mounting portion 34. The flange portion 36 is formed in an umbrella shape and comes into contact with the surface of the vehicle body panel in the mounted state.

The shaft portion 22 extends from the back surface of the flange portion 36, runs along the central axis of the fastener 10 as shown in FIG. 1A, and supports the pair of leg portions 24. As shown in FIG. 1B, the shaft portion 22 has a tapered lower end side, functions as an insertion guide for mounting holes, and is formed in a wall shape to limit the movement of the fastener 10 after mounting. ..

The pair of leg portions 24 extend from the lower end portion of the shaft portion 22 toward the flange portion 36 on the head portion 20 side so as to be folded back, and have a free end. The leg portion 24 bends from the locking portion 38 that locks to the edge of the mounting hole, the base end portion 42 that is continuously provided to the shaft portion 22, the parallel portion 44 that extends substantially parallel to the central axis, and the parallel portion 44. It has a bent portion 40 and a diameter-expanded portion 43 that expands in diameter from the bent portion 40 toward the locking portion 38. In the following, the direction in which the shaft portion 22 extends from the head portion 20 is referred to as an axial direction, and the direction in which the pair of leg portions 24 face each other is referred to as an opposite direction. Further, the surface of the leg portion 24 facing the shaft portion 22 is referred to as an inner surface, the surface not facing the shaft portion 22 is referred to as an outer surface, and FIG. 1B shows the outer surface of the leg portion 24.

The locking portion 38 is formed on the outer surface of the leg portion 24 on the distal end side, and is formed in a tapered shape toward the distal end of the leg portion 24. The bent portion 40 is formed on the outer surface between the base end portion 42 and the locking portion 38, and bends toward the head 20 side so as to be separated from the shaft portion 22. The diameter-expanded portion 43 is formed as a slope that expands in diameter from the bent portion 40 toward the locking portion 38. By forming the bent portion 40, the leg portion 24 is easily bent at the position of the bent portion 40, and the tip end side of the leg portion 24 rotates toward the shaft portion 22 with the bent portion 40 or its vicinity as a rotation fulcrum. As a result, the leg portion 24 is configured to be easily bent at two positions, the base end portion 42 and the bent portion 40.

The connecting portion 26 connects the midway position of the leg portion 24 to the shaft portion 22. The connecting portion 26 connects to the leg portion 24 between the base end portion 42 of the leg portion 24 and the locking portion 38. By forming the connecting portion 26, the deformation of the leg portion 24 in the direction away from the shaft portion 22 is restricted, and the leg portion 24 is crushed when the fastener 10 is pulled out from the mounting hole. It is possible to suppress excessive deformation of the fastener 10 and repeatedly attach / detach the fastener 10 to / from the mounting hole. Further, by setting the connecting portion of the connecting portion 26 and the leg portion 24 at a position between the base end portion 42 and the locking portion 38, the leg portion 24 on the tip side of the connecting portion can be easily bent. .. This makes it easier for the locking portion 38 to move inward when it is inserted into the mounting hole, and it is possible to suppress an increase in the inserting force due to the provision of the connecting portion 26.

FIG. 2 shows a cross section of the line segment AA of the fastener 10 shown in FIG. The upper end position P1 of the connecting portion 26 and the connecting portion 46 of the leg portion 24 is located closer to the base end portion 42 than the bending start position P2 on the outer surface of the bending portion 40, and the connecting portion 26 is located at the base end from the bending portion 40. It is connected to the leg portion 24 on the portion 42 side. As a result, a flexed portion 40 that easily bends is formed between the connecting portion 26 of the connecting portion 26 and the leg portion 24 and the locking portion 38, and while reducing the insertion force at the time of insertion into the mounting hole, the bending portion 40 It is possible to prevent the leg portion 24 from being crushed by bending with the bent portion 40 or its vicinity as a rotation fulcrum when the leg portion 24 is removed. Further, while the leg portion 24 is difficult to bend at the connecting portion 26 and the connecting portion 46 of the leg portion 24, the leg portion 24 can be provided at two locations by setting the locations where the connecting portion 46 is easily bent up and down. It is configured to bend greatly.

The connecting portion 26 and the connecting portion 48 of the shaft portion 22 are located on the head 20 side of the connecting portion 46 with the leg portion 24 in the axial direction. Further, the upper end position P3 of the connecting portion 26 and the connecting portion 48 of the shaft portion 22 is closer to the base end portion 42 than the position P4 of the tip 50 of the leg portion 24. As a result, when the tip 50 of the leg portion 24 bends toward the connecting portion 48 of the shaft portion 22 at the time of insertion, it can be configured so as to be less likely to interfere with the connecting portion 48. As a result, the inward bending width of the leg portion 24 is secured, and it becomes easy to respond to a change in the hole diameter of the mounting hole.

The leg portion 24 has a recessed surface 52 formed by recessing an inner surface facing the connecting portion 26 and the connecting portion 48 of the shaft portion 22. Since the recessed surface 52 makes it easier for the bent portion 40 to bend and secures an inward moving space for the leg portion 24, the leg portion 24 can be configured to be more easily bent inward.

FIG. 3 is a diagram for explaining the operation of the fastener 10 when the fastener 10 is attached to the attachment hole 12a of the member to be attached 12. As shown in FIG. 3A, the fastener 10 is inserted into the mounting hole 12a from the base end portion 42 side. The maximum outer diameter of the fastener 10 at the parallel portion 44 located on the base end portion 42 side of the bent portion 40 is formed to be smaller than the hole diameter of the mounting hole 12a. That is, the maximum outer diameter of the parallel portion 44 located on the base end portion 42 side of the bending start position P2 of the outer surface of the bending portion 40 is formed to be smaller than the hole diameter of the mounting hole 12a. As a result, the fastener 10 can be inserted from the base end portion 42 to the bent portion 40 without hitting the edge of the mounting hole 12a, and can be easily inserted.

As shown in FIG. 3B, when the fastener 10 is further pushed into the mounting hole 12a, the enlarged diameter portion 43 of the leg portion 24 hits the edge of the mounting hole 12a, and the leg portion 24 exerts an upward and inward force. receive. As a result, the portion of the leg portion 24 on the base end portion 42 side of the bent portion 40 is bent so as to rotate toward the shaft portion 22 at the rotation fulcrum C1 near the base end portion 42, and the tip end side of the leg portion 24 is bent. It bends so as to rotate toward the shaft portion 22 at the rotation fulcrum C2 near 40. That is, the leg portion 24 functions like a link mechanism having rotatable joints in the vicinity of the base end portion 42 and the vicinity of the bent portion 40. As a result, the insertion force into the mounting hole 12a can be reduced. When inserted into the mounting hole, the bent portion 40 is more easily bent than the base end portion 42 regulated by the connecting portion 26, and the rotation angle at the rotation fulcrum C2 near the bent portion 40 is the rotation fulcrum C1 near the base end portion 42. It may be configured to be larger than the angle of rotation of.

As shown in FIG. 3C, the leg portion 24 is deformed inward, and the connecting portion 26 is also deformed in conjunction with the deformation. The connecting portion 26 rotates toward the shaft portion 22 at the rotation fulcrum C3 near the connecting portion 48 with the shaft portion 22, the connecting portion 46 with the leg portion 24 approaches the shaft portion 22, and the connecting portion 26 moves downward. It inclines so as to approach the shaft portion 22 as it goes toward it.

As shown in FIG. 3D, when the enlarged diameter portion 43 passes through the mounting hole 12a, the leg portion 24 moves outward in the opposite direction due to the restoring force, and the locking portion 38 moves to the edge of the mounting hole 12a. Lock. In this way, the fastener 10 is attached to the attached member 12.

FIG. 4 is a diagram for explaining the operation of the fastener 10 when the fastener 10 is pulled out from the mounting hole 12a. As shown in FIG. 4A, when the fastener 10 in the mounted state is pulled upward, the locking portion 38 receives a downward and inward force from the edge of the mounting hole 12a.

As shown in FIG. 4B, when the fastener 10 is further pulled upward, the leg portion 24 is deformed so as to be bent at the bent portion 40 in the middle. Specifically, the portion of the leg portion 24 on the base end portion 42 side of the bent portion 40 rotates so as to fall toward the shaft portion 22 at the rotation fulcrum C1, and the tip end side of the leg portion 24 is at the rotation fulcrum C2. It rotates away from the shaft portion 22. The connecting portion 26 rotates toward the shaft portion 22 at the rotation fulcrum C3, the connecting portion 46 with the leg portion 24 approaches the shaft portion 22, and the connecting portion 26 approaches the shaft portion 22 as it goes downward. Tilt.

As shown in FIG. 4C, when the fastener 10 is further pulled, the bent portion 40 is deformed so as to approach the shaft portion 22, and the connecting portion 46 side of the connecting portion 26 with the leg portion 24 is the shaft portion 22. At the same time, the deformation of the leg portion 24 at the rotation fulcrum C1, that is, the deformation of the portion on the base end portion 42 side of the bent portion 40 stops. The tip side of the leg portion 24 is further rotated at the rotation fulcrum C2 so as to be separated from the shaft portion 22, so that the inclined surface of the locking portion 38 is along the axial direction, and the locking portion 38 is formed from the edge of the mounting hole 12a. The lock is released. As a result, the tip end side of the leg portion 24 rotates so as to be separated from the shaft portion 22 so that the locking portion 38 is unlocked, and the portion of the leg portion 24 closer to the base end portion 42 than the bent portion 40 becomes the shaft portion 22. Since the legs 24 are not crushed because they rotate so as to fall toward them, damage to the legs 24 at the time of removal can be suppressed.

As shown in FIG. 4D, the locking portion 38 is unlocked, the fastener 10 is pulled out from the mounting hole 12a, and the leg portion 24 returns to its original position by the restoring force. As described above, since the leg portion 24 is not easily damaged when the fastener 10 is removed, it can be repeatedly attached to and detached from the mounting hole 12a.

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

In the embodiment, the aspect in which the fastener 10 is used for attaching the attachment member to the attached member is shown, but the present invention is not limited to this aspect. When the attachment member and the fastener 10 are integrated, for example, when the decorative member is integrally molded on the head 20 of the fastener 10, the fastener 10 is simply attached to the attached member.

In the embodiment, an embodiment in which the parallel portion 44 is formed on the leg portion 24 is shown, but the embodiment is not limited to this embodiment. For example, the leg portion 24 may be formed so as to expand toward the head portion 20 side as a whole. Further, the connecting portion 26 may also be inclined with respect to the shaft portion 22.

10 Fasteners, 12 Mounting members, 12a Mounting holes, 20 Heads, 22 Shafts, 24 Legs, 26 Connecting parts, 32 1st mounting parts, 34 2nd mounting parts, 36 Flange parts, 38 Locking parts, 40 Bent part, 42 base end part, 43 enlarged diameter part, 44 parallel part, 52 recessed surface.

Claims (6)

A fastener that can be attached to the mounting hole of the member to be mounted.
With the head
A shaft portion extending from the head and
The legs extending from the shaft to the head,
A connecting portion for connecting the leg portion and the shaft portion is provided.
The legs
A base end portion connected to the shaft portion and
A locking portion formed on the outer surface on the tip side and locking to the edge of the mounting hole,
It has a bent portion formed on an outer surface between the base end portion and the locking portion and bent away from the shaft portion toward the head side.
A fastener characterized in that the connecting portion is connected to the leg portion between the base end portion and the locking portion. The fastener according to claim 1, wherein the connecting portion is connected to the leg portion on the base end portion side of the bent portion. The connecting portion of the connecting portion and the shaft portion is located on the head side of the connecting portion of the connecting portion and the leg portion, and is located on the base end portion side of the tip of the leg portion in the axial direction. The fastener according to claim 1 or 2, characterized in that. The fastener according to any one of claims 1 to 3, wherein the leg portion has a recessed surface formed so as to recess an inner surface facing the connecting portion and the connecting portion of the shaft portion. Any of claims 1 to 4, wherein when the fastener is attached to the mounting hole, the leg portion bends so that the tip end side of the leg portion rotates with the bent portion or its vicinity as a rotation fulcrum. Fasteners described in. The fastener according to any one of claims 1 to 5, wherein the outer diameter of the fastener on the base end portion side of the bent portion is formed to be smaller than the hole diameter of the mounting hole.

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