JP2020118209A - Fastener - Google Patents

Abstract

To provide a fastener capable of maintaining the engagement state of an elastic engagement piece to a mounting hole even in a case where a head is pressed toward a direction approaching the front side of a member to be mounted.SOLUTION: A fastener 10 has a body 20 and a washer 50. The body 20 has a head part 21, a column part 30, and an elastic engagement piece 35. The elastic engagement piece 35 has an engagement step part 39 and a protrusion part 40. The washer 50 has an insertion hole 51. The tip outer side of the protruding part 40 forms an inclined surface 45 that approaches the column part 30 toward the head part 21. With the body 20 attached to a mounting hole 3 via the washer 50, when the head part 21 is pressed toward the front side of a member to be mounted 1, a part of the washer 50 is configured to protrude from the back side of the mounting hole 3.SELECTED DRAWING: Figure 6

Description

The present invention relates to a fastener attached to an attachment hole formed in a member to be attached.

For example, a fastener may be attached to an attachment hole provided in a member to be attached such as a vehicle body panel of an automobile, or the attachment member may be attached to the member to be attached via the fastener. When the fastener is attached to the attachment hole of the attached member, a washer made of an elastic member may be arranged between the attachment hole and the fastener in consideration of watertightness, soundproofness and the like.

As a conventional type of this type, in Patent Document 1 below, a substrate for holding an electric wire, a column standing upright from the substrate, a column provided at the base of the column, and obliquely outward toward the column tip end side A skirt portion extending in the direction of, a pair of locking blades extending in a foot-like shape from the end of the column toward the substrate side, and an annular shape that is arranged on the outer periphery of the base of the column on the back side of the skirt. A clip is described that includes a waterproof packing. Further, fitting protrusions are provided on the free ends of the pair of locking blades, respectively. Then, by inserting the pair of locking blades into the mounting hole of the vehicle panel while bending, the fitting protrusions of the respective locking blades enter the inner periphery of the mounting hole and are locked, and at the front side of the mounting hole. The waterproof packing comes into contact, and the peripheral edge of the skirt portion comes into pressure contact with the waterproof packing, so that the clip is mounted in the mounting hole in a watertight state. In this mounted state, a predetermined gap is formed between the back side of the skirt and the waterproof packing.

Utility model registration No. 2574033

In the clip of Patent Document 1 described above, a gap is formed between the back side of the skirt portion and the waterproof packing in the state where the clip is attached to the attachment hole as described above. When pushed in a direction close to, the skirt is crushed and the waterproof packing is deformed so as to fill the gap. As a result, the locking blade may spread on the back side of the mounting hole due to the elastic restoring force, and the fitting protrusion may come off from the inner periphery of the mounting hole.

Therefore, an object of the present invention is to maintain the engagement state of the elastic engagement piece with respect to the attachment hole even when the head is pushed in the direction of approaching the front side of the attachment member in the attachment state to the attachment hole. , To provide fasteners.

To achieve the above object, the present invention provides a fastener that is attached to an attachment hole formed in a member to be attached, the fastener main body being attached to the attachment hole, and the attached member and the fastener body. An elastic washer made of an elastic material is disposed between the fastener body, the fastener main body is disposed on the front side of the mounting hole, a column portion extending from the back side of the head, A flexible elastic engagement piece provided on the pillar portion, wherein the elastic engagement piece includes an engagement step portion that engages with a back side peripheral edge of the mounting hole, and an inner side of the engagement step portion. The elastic washer has an insertion hole into which the column portion is inserted, and has a protrusion that protrudes toward the head portion and is inserted into an inner periphery of the attachment hole, With the fastener body attached, the entire area of the surface facing the head is in close contact with the back surface of the head, and the tip of the protruding portion has a predetermined length from the insertion hole to the outer diameter side. Is configured to bite into the side of the elastic washer opposite to the surface facing the head at a position away from the head, and the outside of the tip of the protrusion approaches the pillar toward the head. When the head is pressed toward the front side of the mounted member in a state where the head body is formed into an inclined surface and the fastener main body is mounted in the mounting hole via the elastic washer, the mounting hole is formed. The fastener is characterized in that a part of the elastic washer is projected from the back side of the fastener.

According to the fastener of the present invention, when the fastener body is attached to the attachment hole via the elastic washer, when the head is pressed in a direction approaching the front side of the attachment target member, from the back side of the attachment hole. Since the elastic washer is configured so as to partly pop out, even if the protrusion is pulled out from the back side of the mounting hole while the head is pushed, the elastic restoring force of the elastic engagement piece tries to spread it toward the outer diameter side. The elastic washer protruding from the gap between the protrusion and the mounting hole can restrict the extension of the protrusion to the outer diameter side. As a result, it is possible to maintain the state in which the protruding portion is arranged on the inner circumference of the mounting hole and maintain the mounting state of the fastener main body in the mounting hole.

It is an exploded perspective view showing one embodiment of a fastener concerning the present invention. FIG. 2 is an enlarged perspective view of a fastener main body that constitutes the same fastener when viewed from a direction different from FIG. 1. It is a front view in the state where a part was broken off of the fastener main body which constitutes the same fastener. It is a side view in the state where a part was broken off of the fastener main body which constitutes the same fastener. It is sectional drawing in the DD arrow line of FIG. It is sectional explanatory drawing which shows the state which attached the same fastener to the attachment hole. FIG. 7 shows a state in which the head is pressed in the direction approaching the front side of the mounted member from the state shown in FIG. 6, (a) is an enlarged cross-sectional explanatory view showing the first state, and (b) is a second sectional view. The expanded sectional explanatory view which shows a state, (c) is an expanded sectional explanatory view which shows a 3rd state. FIG. 6 is a cross-sectional view when the head is pressed in a direction approaching the front side of the mounted member from the state in which the fastener is mounted in the mounting hole, and when the head is cut in the same direction as FIG. 5. The other main part of the fastener which comprises the same fastener shows the other shape of a protrusion, (a) is an expanded sectional explanatory view which shows a 1st other shape, (b) is an expanded sectional explanatory view which shows a 2nd other shape. Is.

An embodiment of a fastener according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a fastener 10 in this embodiment is inserted into an attachment hole 3 formed in a member 1 to be attached and attached, and a fastener body 20 attached to the attachment hole 3 (hereinafter , And also referred to as "main body 20") and an elastic washer 50 (hereinafter, also simply referred to as "washer 50") made of an elastic material and disposed between the mounted member 1 and the main body 20.

Examples of the attached member 1 include a vehicle body panel and a vehicle body frame. Alternatively, another mounting member such as a panel or a cover may be placed on the mounted member 1 and the mounting member may be sandwiched between the mounted member and the fastener. Further, the fastener may be used for closing a mounting hole formed in the mounted member (so-called hole plug), connecting a connector, or the like. Further, in the case of this embodiment, the attachment hole 3 has a substantially oval shape that extends in one direction and has arcuate ends at both ends in the longitudinal direction. However, the mounting hole may be a round hole, an elliptical hole, a rectangular hole, or the like, and is not particularly limited.

As shown in FIG. 1, the main body 20 includes a head portion 21 arranged on the front side of the mounting hole 3, a pillar portion 30 extending from the back side of the head portion 21, and a flexure provided on the pillar portion 30. It has a possible elastic engagement piece 35. Referring also to FIG. 2, the head portion 21 of this embodiment includes a base portion 23 having a long plate shape with rounded sides in the longitudinal direction A, and a boundary portion 24 located at the periphery of the base portion 23. Via the flange portion 25, which extends obliquely outward toward the tip of the pillar portion in an umbrella shape (the boundary portion 24 is provided at the boundary between the base portion 23 and the flange portion 25). In the flange portion 25, both side portions 25a, 25a in the longitudinal direction A are rounded in an arc shape, and both side portions 25b, 25b in the width direction B (see FIG. 2) orthogonal to the longitudinal direction A are parallel to each other. It has a straight line.

As shown in FIGS. 6 and 7, the head portion 21 is disposed on the front side of the mounting hole 3 and holds the washer 50 between the mounted member 1 and the head member 21. Further, as shown in FIG. 6, in a state where the main body 20 is attached to the attachment hole 3, as shown by an arrow F in FIG. 7A, the head portion 21 is pressed toward the front side of the attached member 1. Then, the flange portion 25 is flexibly deformed with respect to the base portion 23 by using the boundary portion 24 as a bending fulcrum, and as shown in FIG. 7B, the peripheral edge portion 25c of the flange portion 25 is attached to the mounted member 1 It is possible to contact the front side of. In addition, as shown in FIG. 7, a back surface 23a (also referred to as an "inner surface" of the base portion 23) facing the front side of the mounted member 1 has a flat surface shape. Further, the back surface 25d of the flange portion 25 has an inclined surface shape that inclines obliquely outward. The head portion 21 may have, for example, a circular shape, an elliptical shape, or a rectangular shape at its peripheral portion, as long as it has a shape corresponding to the mounting hole.

In addition, the "front side of the mounted member" and the "front side of the mounting hole" in the present invention are one side portion in the thickness direction of the mounted member in which the mounting hole is formed, and the head portion of the fastener body is arranged. The "rear side of the mounting hole" means the other side in the thickness direction of the mounted member in which the mounting hole is formed, and is opposite to the side where the head of the fastener body is arranged. Means the side. It should be noted that the "front side of the mounting hole" means one side in the thickness direction of the other member when the other member (another panel or cover described above) is mounted on the member to be mounted. .. Furthermore, in the following description, the "front surface of the mounted member" means the surface of the mounted member on which the head of the fastener body is arranged, and the "back surface of the mounted member" is the mounted member. , The surface of the fastener body opposite to the side where the head is arranged.

The washer 50 is arranged on the back side of the head portion 21 having the above structure. As shown in FIG. 1, the washer 50 of this embodiment has a substantially oval shape in which both ends in the longitudinal direction thereof are rounded in correspondence with the shape of the head portion 21. An insertion hole 51 into which the pillar portion 30 is inserted is formed. The insertion hole 51 in this embodiment has a substantially trapezoidal shape. Further, the entire surface (the entire area excluding the insertion hole 51) of the surface 53 of the washer 50 facing the head portion 21 is in a state in which the main body 20 is attached to the attachment hole 3 via the washer 50 (the elastic engagement piece 35). The engaging step portion 39, which will be described later, is in close contact with the back surface of the head portion 21 in a state of being engaged with the back side peripheral edge of the mounting hole 3. Further, as shown in FIG. 6 and FIG. 7, the side 53a of the washer 50 opposite to the surface 53 facing the head portion 21 comes into contact with the front peripheral edge of the mounting hole 3.

Returning to the description of the main body 20 side again, a substantially square frame-shaped band lock portion 27 is continuously provided on the front side of the head portion 21 (the side opposite to the surface facing the mounted member 1). .. A band portion 29 having a plurality of locking teeth 29a formed on one surface thereof extends from the side opposite to the band insertion opening 27a (see FIGS. 1 and 2) of the band lock portion 27. The band portion 29 is inserted into the band insertion opening 27a, and the band locking piece 27b (see FIGS. 3 and 6) in the band lock portion 27 is intermittently locked to the locking tooth 29a, It is possible to bundle multiple wires and cables. When the fastener of the present invention is used for other purposes, the band lock part and the band part may not be provided. In addition, the head is composed of a plurality of flange portions (for example, three flange portions are provided with a predetermined gap), and two flange portions of the head portion sandwich the mounting seat provided on the mounted member. The head may be fixed to the mounting seat.

In addition, the pillar portion 30 in this embodiment has a predetermined extending direction G (here, a direction orthogonal to the surface direction of the base portion 23) from the back side (the back surface 23a side of the base portion 23) of the base portion 23 forming the head portion 21. ) Is extended. As shown in FIG. 2, the pillar portion 30 has a concave portion 30a having a predetermined depth formed on a surface facing the one side portion 25b of the flange portion 25 (a surface on the side of the band insertion opening 27a). There is.

Further, the elastic engagement pieces 35 extend from the tip end portion 31 in the extension direction of the column portion 30, respectively. Specifically, a pair of elastic engagement pieces 35, 35 are directed toward the head portion 21 from the tip end portion 31 of the pillar portion 30 and the side portions on the both side portions 25a, 25a side of the flange portion 25. It extends diagonally outward to form an anchor. That is, as shown in FIG. 5, the elastic engagement pieces 35 in this embodiment have a structure in which a pair of elastic engagement pieces 35 are formed with the column portion 30 interposed therebetween. In addition, as shown in FIG. 3, each elastic engagement piece 35 is in a direction indicated by an arrow H (a direction in which the column portion 30 approaches and separates from the side portions of the flange portion 25 facing both sides 25a, 25a). It is possible to bend. Each elastic engaging piece 35 is connected to only one place of the pillar portion 30 (here, the tip end portion 31 in the extending direction of the pillar portion 30), and the elastic engaging piece 35 is moved in the inner diameter direction. Even in the bent state, the pillar portion 30 is not contacted or connected.

In addition, as shown in FIG. 4, a positioning wall portion 37 projects from one side in the width direction of the column portion 30 (one side in the width direction B of the head portion 21). In this embodiment, as shown in FIGS. 3 and 5, a pair of positioning wall portions 37, 37 are provided from both sides of the column portion 30. These positioning wall portions 37, 37 are arranged on the inner circumference of the mounting hole 3 when the pillar portion 30 is inserted into the mounting hole 3, and position the main body 20 with respect to the mounting hole 3.

Further, on the free end side (opposite side to the fixed end connected to the column portion 30) of each elastic engagement piece 35, a stepped engagement step portion that engages with the back side peripheral edge of the mounting hole 3 is formed. 39 are formed respectively. As shown in FIG. 6, this engagement step portion 39 engages with the back side peripheral edge of the mounting hole 3, and the side 53 a of the washer 50 opposite to the surface 53 facing the head 21 is the front side of the mounting hole 3. The main body 20 is attached to the attachment hole 3 via the washer 50 by abutting on the peripheral edge. It should be noted that this state is the "attached state in which the main body 20 is attached to the attachment hole 3 via the washer 50", and in the following description, this state is also simply referred to as the "attached state".

Further, from the inside of the engagement step portion 39, there is provided a protruding portion 40 that protrudes toward the head portion 21 and is inserted into the inner periphery of the mounting hole 3. The protruding portion 40 has a base end 41 protruding from the engagement step 39, and a tip 43 continuously provided on the tip side of the base end 41 in the protruding direction. Then, as shown in FIG. 6, with the engagement step portion 39 of the elastic engagement piece 35 engaged with the back side peripheral edge of the attachment hole 3, the tip end 43 of the protrusion 40 is inserted into the insertion hole 51 of the elastic washer 50. It is configured so as to bite into the side 53a of the elastic washer 50 opposite to the surface 53 facing the head 21 at a position distant to the outer diameter side by a predetermined length from.

The outside of the tip of the protruding portion 40 (outside of the tip 43) forms an inclined surface 45 that approaches the column portion 30 toward the head 21. As shown in FIGS. 6 and 7, the inclined surface 45 in this embodiment has an arcuate curved surface shape that gradually becomes thinner toward the top of the tip 43 (the portion most protruding from the engagement step). Has become.

The shape of the protruding portion is not limited to the above shape, and may be, for example, the shape shown in FIG. 9. The protrusion 40A in FIG. 9A has a chamfered shape inclined at a predetermined angle such that the inclined surface 45A gradually becomes thinner toward the top of the tip 43. Further, the protruding portion 40B in FIG. 9B has an arcuate curved surface shape that gradually becomes thinner toward the top of the tip 43 from the base end 41 to the top of the tip 43.

Further, as shown in FIG. 3, in the protruding portion 40 in this embodiment, the outer side 41 a of the base end 41 (outer diameter side in the bending direction of the elastic engagement piece 35) is from the back side of the head portion 21 of the column portion 30. Is formed in parallel to the extending direction G of. As shown in FIG. 6, the protrusion 40 is configured such that the outer side 41a of the base end 41 of the protrusion 40 abuts the inner circumference of the attachment hole 3 in the mounted state. In this state, the inclined surface 45 provided on the outer side of the tip end 43 is configured to be separated from the inner periphery of the mounting hole 3 (separated to the inner side in the radial direction of the mounting hole 3) (FIG. 7(a)). )reference). Moreover, as shown in FIG. 7A, the inclined surface 45 in this embodiment is arranged at a position away from the back side of the mounting hole 3 and close to the front side of the mounting hole 3.

Further, as shown in FIG. 3, the elastic engagement piece 35 is not bent and deformed in the portion 43a (hereinafter, also referred to as “inner portion 43a”) on the inner side (the side closer to the column portion 30 side) of the tip end 43. In the free state, it is parallel to the extending direction G of the column 30. However, as shown in FIG. 7, the inner portion 43a of the tip 43 is in the mounted state, that is, in the state in which the elastic engagement piece 35 is flexed and deformed inward by being pressed by the inner periphery of the mounting hole 3, the pillar portion 43a. With respect to the extending direction G of 30, the so-called reverse taper shape is formed such that the base side of the tip 43 is separated and the top side of the tip 43 gradually approaches, and the tip 43 of the protruding portion 40 easily bites into the washer 50. Has become.

In this fastener 10, as shown in FIGS. 6 and 7(a), in the attached state, as shown by an arrow F in FIG. 7(a), the head portion 21 has the front side of the attached member 1. When pressed in a direction approaching, a part of the washer 50 is configured to pop out from the back side of the mounting hole 3 as shown in FIG. 7(c).

Specifically, in the state shown in FIG. 7A, when the head portion 21 is pressed toward the front side of the mounted member 1, the washer 50 is pressed by the head portion 21, and FIG. As shown in FIG. 3, the engaging step portion 39 is disengaged from the back side peripheral edge of the mounting hole 3, and the base end 41 of the projecting portion 40 is guided to the inner circumference of the mounting hole 3 by the outer side 41 a of the mounting hole 3. While gradually escaping from, the inclined surface 45 moves in the direction approaching the back side of the mounting hole 3. As a result, the gap S1 between the inclined surface 45 and the inner periphery of the mounting hole 3 gradually increases, and a part of the washer 50 pressed into this gap S1 enters. When the head portion 21 is further pressed and the inclined surface 45 exceeds the back side of the mounting hole 3 as shown in FIG. 7C, a gap S2 is generated between the inclined surface 45 and the back side peripheral edge of the mounting hole 3. A part of the washer 50 projects from the back side of the mounting hole 3 through the gap S2.

The above-described partial protrusion of the washer 50 from the back side of the mounting hole 3 when the head 21 is pressed will be described more specifically. That is, as shown in FIG. 7A, the fastener 10 is attached with the distance from the back surface of the attached member 1 to the top of the tip 43 of the protrusion 40 in the attached state to be h1. In the state, when the distance from the surface of the mounted member 1 to the back surface 24a of the boundary portion 24 that is provided between the base portion 23 and the flange portion 25 forming the head portion 21 is h2, h2 is larger than h1. (H2>h1). Further, in the above-mentioned mounted state, the boundary portion 24 is located inside (radially inside) with respect to the inner circumference of the mounting hole 3. In the above-described configuration, when the head 21 is pressed, the washer 50 causes the elastic engagement piece 35 to bend toward the inner diameter side, rather than the elastic restoring force that causes the elastically deformed elastic engagement piece 35 that is flexibly deformed to return to the free state. 7 is larger, or the elastic restoring force of the elastic engagement piece 35 and the force of the washer 50 to bend are the same, as shown in FIG. A gap S2 can be formed between the inclined surface 45 and the back side peripheral edge of the mounting hole 3, and a part of the washer 50 can be projected from the back side of the mounting hole 3 through this gap S2. ..

Further, in this embodiment, as described above, the pair of elastic engagement pieces 35 are formed with the column portion 30 sandwiched therebetween, but the deflection of the column portion 30 on the pair of elastic engagement pieces 35, 35 side. The side portion located inside the direction H (the side portion of the pillar portion 30 facing the side portions 25a, 25a of the flange portion 25) has a recessed notch portion 49 into which a part of the washer 50 is inserted. 49 is formed (see FIG. 5).

5 shows a cross-sectional view of the main body 20 and the pillar portion 30 taken along a cross section perpendicular to the bending direction H of the pair of elastic engagement pieces 35, 35. As shown in FIG. Recessed notches 49, 49 are formed on the outer sides (sides along the longitudinal direction A of the head portion 21) of the pair of positioning walls 37, 37 provided in the unit 30.

Then, when the pillar portion 30 of the main body 20 and the pair of elastic engagement pieces 35, 35 are inserted into the insertion holes 51 of the washer 50 and the washer 50 is arranged on the back side of the head portion 21, the pair of pillar portions 30 A part of the inner circumference of the insertion hole 51 of the washer 50 is inserted into the recessed notches 49, 49 formed in the positioning wall portions 37, 37 so that the washer 50 can be mounted on the main body 20. ing.

In addition, as shown in FIG. 2, on the recessed portion 30a side of the extension direction base end portion of the pillar portion 30, on both sides in the longitudinal direction of the pillar portion 30 (both sides in the longitudinal direction A of the head portion 21), Recessed notches 47, 47 are formed.

Then, the pillar portion 30 of the main body 20 having the washer 50 mounted therein and the pair of elastic engagement pieces 35, 35 are inserted into the mounting hole 3. In the mounted state, as shown in FIG. 6, the pair of notches. The inner circumference of the insertion hole 51 of the washer 50 enters the parts 49, 49 to be in close contact therewith (the inner periphery of the insertion hole 51 is in close contact with the bottom surfaces of the recesses of the notches 49, 49). ). Further, when the head portion 21 is pressed toward the front side of the mounted member 1 in the mounted state as described above (see FIG. 6 ), as shown in FIG. 8, the pair of notch portions 47, 47. Also, the inner periphery of the insertion hole 51 of the washer 50 is inserted and closely adhered. That is, in this embodiment, when the head portion 21 is pressed toward the front side of the mounted member 1 in the mounted state, the inner periphery of the insertion hole 51 of the washer 50 has a plurality of cutout portions 47, It is designed to be in close contact with the entire circumference of the column portion 30 including 49 (see FIG. 8).

In addition, the elastic engagement piece of this embodiment is composed of a pair of anchors that are formed from the tip of the pillar toward the head, but it is provided only on one side of the pillar or in the extension direction of the pillar. There is no particular limitation as long as the structure may be extended, and the structure is flexible and has an engaging step portion and a protruding portion. Further, the pillar portion may be formed in a hollow box shape, and the side wall portion thereof may be formed with an elastic engagement piece that is bendable via a slit.

Next, a method of using the fastener 10 having the above-mentioned configuration and its effects will be described.

First, the pillar 30 of the main body 20 and the pair of elastic engagement pieces 35, 35 are inserted into the insertion holes 51 of the washer 50, the washer 50 is arranged on the back side of the head 21, and the pillar 30 is cut. The washer 50 is attached to the main body 20 by inserting a part of the inner periphery of the insertion hole 51 of the washer 50 into the notches 49, 49 (see FIG. 5). At this time, since the tip end outside of the protrusion 40 forms the inclined surface 45, the protrusion 40 can be easily inserted into the insertion hole 51 of the washer 50, and the washer 50 can be easily attached to the main body 20. In addition, since the tip end outside of the protrusion 40 forms the inclined surface 45, the pillar portion 30 of the main body 20 is inserted into the insertion hole 51 of the washer 50, and the washer 50 is arranged on the back side of the head portion 21. From this, when the protruding portion 40 tries to come out from the back side of the insertion hole 51, the protruding portion 40 can be easily pulled out from the back side of the insertion hole 51, and the back side of the washer 50 can be slid smoothly so that It is possible to quickly move to the bite position (when the outside of the tip of the protruding portion 40 is not an inclined surface but an edge stands (there are corners), the edge is caught in the insertion hole 51, and the insertion hole 51 is inserted. May be widened, and as a result, the protrusion 40 is less likely to come out of the insertion hole 51, and is less likely to move to a predetermined bite position).

Then, in this state, the column portion 30 of the main body 20 and the pair of elastic engagement pieces 35, 35 are inserted from the front side of the mounting hole 3. Then, the pair of elastic engaging pieces 35, 35 are pressed against the inner periphery of the mounting hole 3 and are bent, and when the engaging step portion 39 comes out from the back side of the mounting hole 3, the pair of elastic engaging pieces 35, 35. 35 elastically returns, the engaging step portions 39, 39 engage with the back side peripheral edge of the mounting hole 3, respectively, and the projecting portions 40, 40 enter the inner periphery of the mounting hole 3 and the front side of the mounting hole 3 The side 53a of the washer 50 opposite to the surface 53 facing the head 21 abuts on the peripheral edge. As a result, as shown in FIG. 6, the main body 20 can be attached to the attachment hole 3 via the washer 50 while the washer 50 is sandwiched between the head portion 21 and the front side of the attached member 1. it can. In this state, as shown in FIG. 7A, the outer side 41a of the base end 41 of the protrusion 40 abuts on the inner circumference of the mounting hole 3, and the inclined surface 45 provided outside the tip end 43 is , Is arranged at a position separated from the inner circumference of the mounting hole 3 and close to the front side of the mounting hole 3.

When the head portion 21 is pressed in the direction of approaching the front side of the mounted member 1 in the mounting state as described above, as shown by the arrow F in FIG. 7A, as shown in FIG. The base end 41 of the projecting portion 40 gradually comes out from the back side of the mounting hole 3, and the inclined surface 45 moves in the direction of approaching the back side of the mounting hole 3 to form a gap between the inclined surface 45 and the inner periphery of the mounting hole 3. When a part of the washer 50 enters the S1 and the inclined surface 45 exceeds the back side of the mounting hole 3 as shown in FIG. 7C, a gap generated between the inclined surface 45 and the back side peripheral edge of the mounting hole 3. Through S2, a part of the washer 50 pops out from the back side of the mounting hole 3.

As described above, when the head portion 21 is pushed, the protruding portion 40 tries to spread toward the outer diameter side by the elastic restoring force of the elastic engagement piece 35 while coming out from the back side of the mounting hole 3, but this fastener 10 In the above, as described above, as shown in FIG. 7C, the outer diameter of the protruding portion 40 is increased by the elastic washer 50 protruding from the gap S2 between the inclined surface 45 of the protruding portion 40 and the back side peripheral edge of the mounting hole 3. The spread to the side can be regulated. As a result, it is possible to prevent the protruding portion 40 from coming out of the mounting hole 3, hold it in a state of being arranged on the inner periphery of the mounting hole 3, and maintain the mounting state of the main body 20 in the mounting hole 3.

Further, in this embodiment, in the mounted state, the protruding portion 40 has an outer side 41a of the base end 41 abutting against the inner circumference of the mounting hole 3 and an outer side of the tip end 43 as shown in FIG. 7A. The provided inclined surface 45 is configured to be separated from the inner circumference of the mounting hole 3 toward the inner diameter side. In this way, in the mounted state, as shown in FIG. 7A, the outer side 41a of the base end 41 of the projecting portion 40 abuts on the inner circumference of the mounting hole 3, so that the mounting hole 3 of the elastic engagement piece 35 can be attached. It is possible to suppress the movement in the outer radial direction with respect to.

Further, since the inclined surface 45 provided on the outer side of the tip end 43 of the projecting portion 40 is formed so as to be separated from the inner periphery of the mounting hole 3 in the above-mentioned mounted state, the head portion 21 is pushed from the above-mentioned state. At this time, a gap S1 (see FIG. 7B) can be secured between the inclined surface 45 of the protrusion 40 and the inner periphery of the mounting hole, and a part of the washer 50 can be easily inserted into the gap S1. As a result, it is possible to easily project from the gap S2 between the inclined surface 45 and the back side peripheral edge of the mounting hole 3, and it is possible to more firmly maintain the mounting state of the main body 20 in the mounting hole 3.

Further, the outer side 41a of the base end 41 of the protrusion 40 abuts on the inner circumference of the mounting hole 3, so that the elastic restoration of the elastic engagement piece 35 can be suppressed in a state where the head 21 is slightly pushed. Therefore, the gap S1 between the inclined surface 45 and the inner periphery of the mounting hole 3 can be easily secured, and a part of the washer 50 can be easily inserted into the gap S1.

Further, in this embodiment, the elastic engagement pieces 35 are formed in a pair with the pillar portion 30 interposed therebetween, and are arranged inside the pillar portion 30 in the bending direction H on the pair of elastic engagement pieces 35, 35 side. On the side part located, the recessed notch parts 49, 49 into which a part of the washer 50 is inserted are formed. Therefore, the washer 50 can be firmly positioned and arranged on the back surface side of the head portion 21.

In addition, in this embodiment, a plurality of cutout portions 49, 49 are formed in the column portion 30, and as shown in FIG. 6, in the attached state, the insertion holes of the washers 50 are inserted into the cutout portions 49, 49. The inner circumference of 51 is configured so as to come into close contact therewith. Therefore, the washer 50 can be positioned and arranged more firmly on the back side of the head portion 21. In addition, the gap between the inner periphery of the insertion hole 51 of the washer 50 and the outer periphery of the column portion 30 can be filled in a wide range, and the entire area of the washer 50 facing the head 21 is in close contact with the back surface of the head 21. Therefore, in the attached state, when the head 21 is pushed, the direction in which the washer 50 compressively deforms and escapes can be limited, and the inclined surface 45 of the protruding portion 40 and the back side peripheral edge of the mounting hole 3 can be limited. It is possible to make a part of the washer 50 more easily pop out from the gap S2 of (the gap between the inner periphery of the insertion hole and the outer periphery of the column portion, and the gap between the surface facing the head and the back surface of the head are elastic. When the washer is filled with the elastic washer, the elastic washer tends to face the rear side of the mounting hole), and the mounting state of the main body 20 in the mounting hole 3 can be more reliably maintained.

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

1 Attached member 3 Mounting hole 10 Fastener 20 Fastener body (main body)
21 head part 27 band lock part 29 band part 30 column part 35 elastic engagement piece 39 engagement step parts 40, 40A, 40B projecting part 41 base end 43 tip ends 45, 45A, 45B inclined surface 47, 49 notch part 50 elasticity Washer (washer)
51 insertion hole

Claims (4)

A fastener that is attached to an attachment hole formed in a member to be attached,
A fastener main body attached to the attachment hole, and an elastic washer made of an elastic material, disposed between the attached member and the fastener main body,
The fastener body has a head portion arranged on the front side of the mounting hole, a column portion extending from the back side of the head portion, and a flexible elastic engagement piece provided on the column portion. Then
The elastic engagement piece has an engagement step portion that engages with the back side peripheral edge of the attachment hole, and a protrusion that protrudes from the inside of the engagement step portion toward the head and is inserted into the inner periphery of the attachment hole. And has a section
The elastic washer has an insertion hole into which the column portion is inserted, and in the mounting state in which the fastener main body is mounted in the mounting hole via the elastic washer, the entire area of the surface facing the head is the It comes in close contact with the back of the head,
The tip of the protruding portion is located at a position away from the insertion hole toward the outer diameter side by a predetermined length, and is configured to bite into the side opposite to the surface of the elastic washer facing the head.
The tip outer side of the protruding portion forms an inclined surface that approaches the pillar portion toward the head portion, and in the mounted state, when the head portion is pressed in a direction toward the front side of the mounted member, A fastener characterized in that a part of the elastic washer projects from the back side of the mounting hole. The protruding portion is configured such that, in the mounted state, a base end outer side thereof abuts an inner circumference of the mounting hole, and the inclined surface provided on a tip outer side is separated from an inner circumference of the mounting hole toward an inner diameter side. The fastener according to claim 1, which is provided. The elastic engagement pieces are formed in a pair with the pillar portion interposed therebetween,
A recessed cutout portion into which a part of the elastic washer is inserted is formed on a side portion of the column portion that is located inside a bending direction of the pair of elastic engagement pieces. The fastener described in 2. The said notch part is multiply formed in the said pillar part, and it is comprised so that the inner periphery of the said insertion hole of the said elastic washer may adhere|attach on each notch part in the said mounting state. Fastener.

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