JP2017075663A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener of a structure capable of making removal after fixing impossible, and preventing rotation of a male body to a female body.SOLUTION: A male body 10 includes an engagement projection 14 composed of a male body shaft portion 15, a flange portion 16 and a side guide wall 18, a male body 20 is provided with a shaft hole 25 for inserting the engagement projection 14 of the male body 10, the shaft hole 25 has an upward step portion 26 engaged with a downward step portion 17 of the male body 10, and a fitting space 27, and a split groove 28 is formed on a part from a male body base portion 23 to a part of the female body shaft portion 24 through the upward step portion 26. When the engagement projection is inserted in a state that the side guide wall 18 and the split groove 28 are corresponded to each other, the downward step portion 17 and the upward step portion 26 are engaged, and rotation of the male body 10 is prevented, and when it is inserted in a state that their positions are shifted from each other, the upward step portion 26 is closely kept into contact with an outer peripheral face 18a of the side guide wall 18 to have a temporarily fixing state.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a fastener that is fixed by inserting a male body side into a female body side, and more particularly, to a fastener that is difficult to remove after fixing and to rotate the male body relative to the female body.

Screws, nuts, snaps, hooks, scissors, etc. made of synthetic resin as fixing fasteners (stoppers) when fixing sheet members in layers or fixing one member to the other Is conventionally used.
Many fasteners are detachable so that they can be repeatedly attached and removed, but some fasteners are used for applications where it is desirable that once attached they cannot be removed again.
For example, when assembling a corrugated cardboard box, when assembling, part of the side of the corrugated paper is folded at the corners so that adjacent side parts overlap, and the overlapped corrugated paper is fixed with a fastener. It is like that. At this time, a pair of male and female fasteners are used as “corner fasteners” for fixing the corners. In this case, it is necessary that the fasteners are never detached or broken after being temporarily fixed. Become.

  As a fastener suitable for such applications, the applicant has developed and applied a fastener composed of a male body and a female body, in which a large dividing groove is formed along the axial direction of the female body. (See Patent Document 1).

FIG. 7 is a perspective view showing a fastener 1a disclosed in Patent Document 1, and the fastener 1a is composed of a male body 10a and a female body 20a, and shows a state in which these are engaged with each other and fixed. Yes.
8 is a perspective view of the male body 10a, FIG. 9 is a perspective view (a) of the female body 20a and a front view (b) as seen from the direction in which the dividing grooves 28 are formed, and FIG. 10 is a fastener 1a. It is sectional drawing in the use condition of.

The male body 10a and the female body 20a of the fastener 1a are composed of a pair of members made of synthetic resin (polyethylene or the like).
The male body 10 a includes a disk-shaped male base 13 having a flat inner surface 11 and a convex outer surface 12, and an engaging protrusion 14 erected from the inner surface 11.
The engagement protrusion 14 includes a male shaft portion 15 that forms a columnar shaft on the side close to the male base portion 13, and a flange portion 16 provided at the tip of the male shaft portion 15. A constricted portion 17 a having an outer diameter smaller than that of the flange portion 16 is formed at a boundary portion between the flange portion 16 and the male body shaft portion 15. The constricted portion 17 a is formed with the tapered end of the male shaft portion 15 as a tapered outer peripheral surface, and the outer diameter of the flange portion 16 and the outer diameter of the base portion side of the male body shaft portion 15 are substantially the same. It is. By forming the constricted portion 17a, a downward step surface serving as the lower surface of the flange portion 16 is formed. This step portion becomes an engagement surface when engaging with a step surface 26a of the female body 20a described later. The peripheral edge of the upper surface of the collar portion 16 is rounded and chamfered.

  The female body 20 a includes a disk-shaped female base 23 having a flat inner surface 21 and a convex outer surface 22, and a female shaft 24 erected from the inner surface 21. The shaft diameter of the female body shaft portion 24 is larger than the outer diameter of the flange portion 16 of the male body 10a, and a shaft hole 25 that penetrates the female body shaft portion 24 in the axial direction and opens to the outer surface 22 is formed. It is formed.

  The shaft hole 25 has an inner diameter that matches the shape of the engagement protrusion 14 so that the engagement protrusion 14 of the male body 10a can be inserted, and is a constricted portion that is a tapered outer peripheral surface on the distal end side of the male body shaft portion 15. A tapered inner peripheral surface 25a is formed in a portion corresponding to 17a, and a fitting space 27 into which the flange portion 16 is fitted is formed in a portion corresponding to the flange portion 16. That is, the shaft hole 25 is formed with a fitting space 27 that fits with the flange portion 16 at a portion that opens toward the outer surface 22, and a hole having a smaller diameter than the outer diameter of the flange portion 16 at the back of the fitting space 27. A step surface 26a that engages with the step on the lower surface of the flange portion 16 is formed, and a tapered inner peripheral surface 25a is formed from the step surface 26a, and a male body axis is formed at the tip of the tapered inner peripheral surface 25a. A cylindrical inner peripheral surface 25b into which a columnar portion on the base 15 side is inserted is formed.

  Further, a part of the female body shaft portion 24 (from the outer surface 22 of the female body base portion 23 through the step surface 26a to a part of the female body shaft portion 24 (in FIG. A dividing groove 28 that divides the female body 20a is formed along the axial direction of the shaft hole 25 (depth beyond the peripheral surface 25a formation region), and the female base 23 side is divided into four by the dividing groove 28. ing. By forming such a dividing groove 28, the female body base 23 can be elastically deformed and can greatly expand in the radial direction.

Therefore, when the flange portion 16 of the male body 10a is inserted to a position where it comes into contact with the tapered inner peripheral surface 25a of the shaft hole 25, the tapered inner peripheral surface 25a of the shaft hole 25 is expanded by elastic deformation of the female body 20a. Thus, the collar portion 16 can be inserted without resistance.
Further, since the female body 20a is elastically deformed, the hole diameter at the position of the step surface 26a can be greatly changed, so that the area of the step surface 26a that is in contact with the step of the flange portion 16 can be made sufficiently large. It has become.

Here, as a specific example, a usage example of the male body 10a and the female body 20a in the case where the plate-like first member 1D and the second member 2D such as corrugated paper are fixed will be described with reference to FIG.
The male body 10a is attached so that the engagement protrusion 14 passes through the through hole formed in the first member 1D, and the inner surface 11 of the male body base 13 abuts on the first member 1D. Similarly, the female body 20a is attached so that the female body shaft portion 24 passes through the through-hole formed in the second member 2D, and the inner surface 21 of the female body base portion 23 is in contact with the second member 2D. .

  When the engaging protrusion 14 of the male body 10a is inserted from the cylindrical inner peripheral surface 25b side of the shaft hole 25 of the female body 20a, the flange 16 of the engaging protrusion 14 eventually reaches the position of the tapered inner peripheral surface 25a. When you reach and touch this, you will receive light resistance. When further inserted, the female body 20a is elastically deformed and the tapered inner peripheral surface 25a is pushed and expanded. When the flange portion 16 exceeds the step surface 26a, the female body 20a returns from the elastically deformed state to the step surface 26a. The step of the constricted portion 17a comes into contact with the step. And the side surface of the collar part 16 is fitted by the inner surface of the fitting space 27, and the male body 10a is completely fixed to the female body 20a.

Once the male body 10a is fixed to the female body 20a, even if a strong pulling force in the axial direction for pulling out the male body 10a from the female body 20a is applied, both are firmly fixed, so that the engaged state is maintained. It becomes difficult to cancel.
That is, since the step of the constricted portion 17a of the male body 10a is in contact with the step surface 26a of the female body 20a, this becomes a strong resistance and cannot be pulled out. Moreover, the greater the pulling force is applied, the more each split piece on the female body base 23 side divided by the split groove 28 in the female body 20a supports the bottom of the split groove 28 (the position of the line SS ′ in FIG. 10) as a fulcrum ( A moment of force acting on the step surface 26a as a force point acts, and the side surface of the flange portion 16 and the vicinity of the constricted portion 17a are strongly pressed from the periphery. By this action, the resistance against the pulling force is further increased and the engagement becomes firm.
As described above, by using the fastener 1a, once the male body 10a and the female body 20a are fixed, they are firmly fixed and cannot be easily removed.

International Publication No. WO2015 / 111234

Said fastener 1a is a very excellent fastener in the use which prevents the removal after fixation.
On the other hand, depending on the application, it may be required not only to make the removal after fixation impossible but also to prevent the male body from rotating relative to the female body.
For example, in the usage example of FIG. 10, when it is desired to fix the surfaces of the first member 1D and the second member 2D sandwiched between the male body 10a and the female body 20a so as not to rotate, the male body 10a is female. If it can be fixed so that it cannot rotate with respect to the body 20a, the inner surface 11 of the male body 10a is adhered to the first member 1D with an adhesive or the like, and the inner surface 21 of the female body 20a is adhered to the second member 2D. It is possible to prevent the rotation of the first member 1D and the second member 2D simply by placing them.
Therefore, a first object of the present invention is to provide a fastener having a structure in which a male body cannot be rotated with respect to a female body while it cannot be removed once fixed.

In addition, as a different application, a plurality of holes are formed in the first member 1D and the second member 2D, and it is desired to fix all the holes using the same number of fasteners 1a for each of the plurality of holes. There is. In that case, in the method of fixing the fasteners 1a through the holes one by one, the fasteners 1a that have already been fixed cannot be removed when some trouble occurs on the way. In order to prevent such a situation, the fastener 1a is attached to all the holes in a temporarily fixed state, and after confirming that there is finally no defect, a method of shifting from the temporarily fixed state to a completely fixed state. Is desirable.
Then, this invention sets it as the 2nd objective to provide the fastener which can be made into the temporary fix | stop state which can be removed as a pre-stage of the completely fixed state which is difficult to remove.

In order to solve the above problems, the present invention takes the following technical means.
That is, the fastener of the present invention is a fastener comprising a male body and a female body, wherein the male body is a plate-like male body base, a male shaft portion erected from the inner surface of the male body base, At least two portions of the male shaft portion that are spaced apart from each other, and a collar portion that is larger in diameter than the peripheral wall of the male shaft portion and extends downward at the tip of the male shaft portion so as to form a downward stepped portion. An engagement protrusion provided with a side guide wall that protrudes laterally from the position of the peripheral wall so as to have the same diameter as the flange, and that connects the flange and the male base portion along the axial direction. The female body includes a plate-shaped female body base, and a female body shaft that is erected from an inner surface of the female body base and has a larger diameter than the buttocks of the male body. A shaft hole is formed in the shaft hole through which the engagement protrusion is inserted. The shaft hole has an inner diameter that is the diameter of the flange portion. The engagement protrusion inserted into the shaft hole is further formed with an upward step portion that engages with the downward step portion of the flange portion, and a fitting space having a diameter in which the flange portion is fitted. A portion extending from the female body base portion to the part of the female body shaft portion through the upward stepped portion at at least two positions corresponding to a position in which the side guide wall protrudes and a circumferential position. A split groove having a groove width into which the side guide wall can be fitted is formed along the axial direction of the shaft hole, and the engaging projections are positioned in the circumferential direction between the side guide wall and the split groove. When the corresponding stepped portion is inserted into the shaft hole of the female body, the upward stepped portion divided by the dividing groove is temporarily spread and penetrates, so that the downward stepped portion becomes the upward stepped portion. And the flange is fitted into the fitting space, When a force in the direction of pulling out the engagement protrusion from the shaft hole is applied after the upward stepped portion is engaged with the upward stepped portion, the upward stepped portion is pressed and the flange portion is pressed from the side. The side guide wall is inserted into the dividing groove to restrict the rotation of the male body in the circumferential direction, and the engagement protrusion is formed of the side guide. When inserted in the shaft hole of the female body with the circumferential position of the wall and the dividing groove being displaced, the upward stepped portion is penetrated in a state of being expanded, so that the side An upward stepped portion is pressed against the outer peripheral surface of the guide wall so as to be in a temporarily fixed state.

According to the present invention, the female body is divided into a plurality of divided grooves from the outer surface of the female body base to the part of the female body shaft section through the upward stepped portion, and the male body is the male body shaft section. A side guide wall having the same diameter as the flange portion and a width that can be fitted into the dividing groove is provided from the peripheral wall to the side. And the side guide wall and the division | segmentation groove | channel are provided so that the position of the circumferential direction may correspond.
Accordingly, when the male body engaging protrusions are inserted into the shaft holes of the female body so that the circumferential guide positions of the side guide wall and the dividing groove coincide with each other, The upward stepped portion is pushed and penetrated, the downward stepped portion of the male body and the upward stepped portion of the female body are engaged, the flange portion is fitted into the fitting space, and the side guide wall is further fitted into the dividing groove Is inserted.
As a result, after the male body is fixed to the female body, the downward step portion presses the upward step portion when the force in the direction of pulling out the engagement protrusion from the shaft hole and the force rotating the engagement protrusion are applied. At the same time, not only pulling out becomes difficult due to the force of pressing the buttocks from the side, and the rotation of the male body in the circumferential direction is restricted by the side guide walls being inserted into the dividing grooves. .
In addition, when the engagement protrusion is inserted into the shaft hole of the female body with the circumferential position of the side guide wall and the dividing groove being displaced, the flange portion remains in a state where the upward stepped portion is pushed and widened. As a result of penetrating, the upward stepped portion comes into pressure contact with the outer peripheral surface of the side guide wall, resulting in a temporarily fixed state. When a force in the pulling direction is applied again in the temporarily fixed state, the pulling out can be performed only by applying a force exceeding the frictional force in which the upward stepped portion presses the outer peripheral surface of the side guide wall. On the other hand, by rotating the male shaft portion from the temporarily fixed state to eliminate the positional deviation, the side guide wall is fitted into the dividing groove and the upward step portion and the downward step portion are engaged with each other. Fixing is realized.

  Therefore, according to the present invention, by inserting the male body into the female body with the side guide wall and the circumferential position of the dividing groove aligned, the male body can be firmly fixed and the rotation of the male body can be restricted. In addition, by inserting the male body into the female body while shifting the positions of the side guide walls and the dividing groove in the circumferential direction, it is possible to obtain a temporarily fixed state in which the male body can be extracted again.

  In the above invention, a tapered inner peripheral surface is formed in the shaft hole of the female body from the upward stepped portion to the groove bottom of the dividing groove along the axial direction. Is preferred. Thereby, a collar part can be inserted smoothly.

  In the above invention, the male body and the female body may be integrally connected via a deformable connecting member. Thereby, since a male body and a female body can be hold | maintained in a pair, the malfunction that either a male body or a female body runs short and cannot be stopped can be prevented.

  In the above invention, a hook mechanism may be attached to at least one of the male body, the female body, or the connecting member. Thus, the hook mechanism can be firmly attached to the other member fixed by the fastener.

The perspective view which shows one Embodiment of the fastener which concerns on this invention. The figure which shows the male part of the fastener of FIG. The figure which shows the female body part of the fastener of FIG. Sectional drawing of the fastener shown in FIG. The fragmentary sectional view which shows the temporary fix | stop state of the female body in the fastener of this invention. The figure which shows the modification Example of the fastener which concerns on this invention. The perspective view which shows the structure of the conventional fastener. The figure which shows the male part of the fastener of FIG. The figure which shows the female body part of the fastener of FIG. Sectional drawing of the fastener shown in FIG.

The details of the present invention will be described below with reference to the drawings showing embodiments thereof.
FIG. 1 is a perspective view showing a fastener 1 according to an embodiment of the present invention. The fastener 1 includes a male body 10 and a female body 20, and FIG. 1 shows a state in which they are engaged and fixed (used state).
2A and 2B are diagrams showing the configuration of the male body 10, wherein FIG. 2A is a plan view, FIG. 2B is a front view, FIG. 2C is a cross-sectional view taken along the line AA 'in FIG. It is a BB 'sectional view taken on the line in FIG.
3A and 3B are diagrams showing the configuration of the female body 20, in which FIG. 3A is a plan view and FIG. 3B is a partially sectional front view.
4 is a cross-sectional view of the fastener 1 in FIG. 1 in a fixed state.
Although the female body 20a of the fastener 1a described in the conventional example of FIGS. 7 to 10 is divided into four by the dividing groove 28, this embodiment is different in that the female body 20 is divided into three. Components other than this point having the same function are denoted by the same reference numerals and description thereof is omitted.

The fastener 1 is composed of a pair of members composed of a male body 10 and a female body 20 made of synthetic resin (polyethylene or the like).
The male body 10 includes a disk-shaped male base portion 13 having a flat inner surface 11 and an outer surface 12, and an engaging protrusion 14 erected from the inner surface 11. The male base 13 is provided with a lightening opening 13a in order to save the amount of resin used at the time of manufacture and to perform stable processing at the time of processing.

The engagement protrusion 14 has a male shaft portion 15 that forms a columnar shaft on the side close to the male base portion 13, and a flange portion 16 that is larger in diameter than the male shaft portion 15 and provided at the tip of the male shaft portion 15. And projecting laterally from the peripheral wall 15a so as to have the same diameter as the flange part 16, at positions that are rotationally symmetric with respect to the axis of the male body shaft part 15, specifically, spaced apart by 120 degrees, 16 and a side guide wall 18 connecting the male base 13 along the axial direction.
At a boundary portion between the flange portion 16 and the male shaft portion 15, a downward stepped portion 17 that forms a step as a lower surface of the flange portion 16 at a position where the side guide wall 18 protrudes and does not have the same diameter as the flange portion 16. Is formed. The downward stepped portion 17 serves as an engagement surface when engaged with the upward stepped portion 26 of the female body 20 described later. The peripheral edge of the upper surface of the collar portion 16 is rounded and chamfered.

  The female body 20 includes a disk-shaped female base portion 23 having a flat inner surface 21 and a convex outer surface 22, and a female shaft portion 24 erected from the inner surface 21. A dividing groove 28 is formed along the axis J direction over a part of the body shaft portion 24 (SS ′ line in FIG. 4). The female body 20a described in FIG. 9 (divided into 90 degrees by 4) and the female body 20a described in FIG. 9 except that the number of the dividing grooves 28 is three at the rotationally symmetric (120 degrees apart) around the axis J. The structure is basically the same. That is, the outer diameter of the female body shaft portion 24 is larger than the outer diameter of the flange portion 16 of the male body 10, and the shaft hole that penetrates the female body shaft portion 24 in the axial direction and opens to the outer surface 22. 25 is formed.

The inner diameter of the shaft hole 25 is adjusted to the outer diameter of the flange portion 16 so that the flange portion 16 of the male body 10 can be inserted. That is, a fitting space 27 into which the flange 16 is fitted is formed in a portion corresponding to the flange 16 in a state where the male body 10 is inserted to a state where it is fixed to the female body 20. An upward step portion 26 is formed at a position corresponding to the downward step portion 17 of the male body 10 at a position that becomes the lower surface of the space 27.
Further, a tapered inner peripheral surface 25a whose inner diameter increases toward the lower side is formed in the shaft hole 25 in the region below the upward stepped portion 26 and above the groove bottom of the dividing groove 28, The inner diameter of the lower shaft hole 25 is adjusted to the outer diameter of the flange 16 again.
The female base portion 23 is divided into three by the dividing groove 28. By forming such a dividing groove 28, the female base portion 23 can be elastically deformed so that it can expand greatly in the radial direction. It is. Further, the groove width W of the dividing groove 28 is formed to be a width into which the side guide wall 18 of the male body 10 is fitted.

  Next, a state where the male body 10 and the female body 20 are engaged and fixed will be described. The left half of FIG. 4 is a cross section of a portion where the side guide wall 18 is fitted into the dividing groove 28, and the right half is engaged with the downward stepped portion 17 of the male body 10 and the upward stepped portion 26 of the female body 20. It is a cross section of a part. That is, when the outer peripheral surface 18a (see FIG. 2 (c)) serving as the peripheral wall of the side guide wall 18 of the male body 10 is inserted into the female body 20 so as to be positioned at the dividing groove 28, FIG. It is sectional drawing corresponding to the BB 'line cross section of a).

With the outer peripheral surface 18a of the side guide wall 18 aligned with the circumferential position of the dividing groove 28, the flange portion 16 of the male body 10 is inserted from below to a position in contact with the tapered inner peripheral surface 25a of the shaft hole 25. As the female body 20 is pushed and expanded by the elastic deformation at the tapered inner peripheral surface 25a, the flange portion 16 is further inserted upward.
When the flange portion 16 is inserted to a position completely penetrating the upward step portion 26 and the downward step portion 17 exceeds the upward step portion 26, the elastic deformation returns to the original, and the upward step portion 26 and the downward direction as shown in FIG. The stepped portion 17 comes into contact.

  After the interview of the upward step portion 26 and the downward step portion 17, this becomes a strong resistance and cannot be pulled out. Moreover, the greater the pulling force is applied, the respective split pieces on the female base 23 side divided by the split groove 28 of the female body 20 have the groove bottom (SS ′ line) of the split groove 28 as a fulcrum (axis), A moment of force with the upward step portion 26 as a power point acts, and the vicinity of the flange portion 16 and the downward step portion 17 is strongly pressed from the periphery. By this action, the resistance against the pulling force is further increased and the engagement becomes firm.

  At this time, since the side guide wall 18 is fitted in the groove of the dividing groove 28, both side surfaces 18b and 18b (see FIG. 2C) of the side guide wall 18 are tapered inner peripheral surfaces 25a. Therefore, the male body 10 is prevented from rotating with respect to the female body 20.

  Therefore, the first member 1D and the second member 2D can be obtained by simply bonding the inner surface 11 of the male body 10 to the first member 1D with an adhesive or the like and bonding the inner surface 21 of the female body 20 to the second member 2D. Can be eliminated.

Next, the temporarily fixed state of the male body 10 and the female body 20 will be described with reference to FIG. That is, when the male body 10 and the female body 20 are in the fixed state shown in FIG. Therefore, in order to confirm whether or not the fixing can be performed immediately before the fixing, the outer peripheral surface 18a of the side guide wall 18 is aligned with the position away from the dividing groove 28 in the rotational direction, and the male body 10 is adjusted to the female body 20. By inserting it in, it can be temporarily set in a temporarily fixed state.
As shown in FIG. 5, the upward stepped portion 26 of the female body 20 comes into pressure contact with the outer peripheral surface 18a of the side guide wall 18 in a state of being elastically deformed, and the temporarily fixed state is maintained by this pressure contact force.
Therefore, it can be confirmed whether or not it can be fixed in the temporarily fixed state. If there is no problem, the male body 10 is rotated and the outer peripheral surface 18a of the side guide wall 18 is fitted into the dividing groove 28. Can be completely fixed.

(Modified Example)
The present invention is not necessarily limited to the above-described embodiment, and can be appropriately modified and changed within the scope of achieving the object of the present invention and not departing from the scope of the claims.
For example, in the above-described embodiment, the male body 10 and the female body 20 of the fastener 1 are separated from each other, but they can be manufactured integrally. Specifically, the problem that the number of one of the male body and the female body is insufficient can be eliminated by integrally connecting the male body and the female body via a deformable coupling member. Further, by attaching a hook mechanism to either the male body or the female body, the article fixed by the fastener and the hook mechanism can be integrated.

6A and 6B are views showing the fastener 2 that is integrated with a connecting member and provided with a hook mechanism, where FIG. 6A is a plan view and FIG. 6B is a front view. The fastener 2 is integrally formed so that the male body 50, the female body 51, the connecting member 52, and the hook mechanism 53 are connected.
The hook mechanism 53 constitutes a part of the female base portion of the female body 51, and a part of the hook mechanism 53 also serves as the connecting member 52. The connecting member 52 is thin so that the intermediate portion 54 can be bent, and the male body 50 and the female body 51 can be fixed by folding back at this portion.
In the present embodiment, the connecting member 52 and the hook mechanism 53 have thicknesses that are difficult to deform. However, if the connecting member 52 is made thin without being provided with the hook mechanism 53, the female body 51 can be freely deformed. In contrast, the male body 50 can be used in a temporarily fixed state.
In FIG. 6, the hook mechanism 53 is provided on a part of the female body 51, but may be provided on the connecting member 52 or the male body 50 instead.

  Moreover, although the said embodiment used what divided the female body base into 3 parts, it is good also as 2 parts, 4 parts, etc. Further, the material to be used is not limited to resin, but may be metal, and any of them can be manufactured by molding using a mold.

  INDUSTRIAL APPLICABILITY The present invention can be used as a fastener that is fixed by inserting the male body side into the female body side.

1, 2 Fasteners 10, 50 Male body 11 Inner surface 13 Male base portion 14 Engagement protrusion 15 Male shaft portion 16 Hook portion 17 Downward stepped portion 18 Side guide wall 18a Outer peripheral surface 20, 51 Female body 21 Inner surface 22 Outer surface 23 Female body base portion 24 Female body shaft portion 25 Shaft hole 25a Tapered inner peripheral surface 26 Upward stepped portion 27 Fitting space 28 Dividing groove 52 Connecting member 53 Hook mechanism

In order to solve the above problems, the present invention takes the following technical means.
That is, the fastener of the present invention is a fastener comprising a male body and a female body, wherein the male body is a plate-like male body base, a male shaft portion erected from the inner surface of the male body base, At least two portions of the male shaft portion that are spaced apart from each other, and a collar portion that is larger in diameter than the peripheral wall of the male shaft portion and extends downward at the tip of the male shaft portion so as to form a downward stepped portion. An engagement protrusion provided with a side guide wall that protrudes laterally from the position of the peripheral wall so as to have the same diameter as the flange, and that connects the flange and the male base portion along the axial direction. The female body includes a plate-shaped female body base, and a female body shaft that is erected from an inner surface of the female body base and has a larger diameter than the buttocks of the male body. parts through the opening on the outer surface of the female body base, the shaft hole into which the engagement projection is inserted is formed, the shaft hole, the flange portion is fitted The fitting space of formed at the opening portion of the outer surface of the female body base, downward inside diameter at a position where the lower surface of the fitting space is the flange portion and the side smaller than the diameter of the guide wall the flange portion An upward stepped portion that engages with the stepped portion is formed, and has a tapered shape that expands along the axial direction below the upward stepped portion until the inner diameter becomes the same as the diameter of the flange portion and the side guide wall. An inner peripheral surface is formed, an inner peripheral surface having the same diameter as the flange and the side guide wall is formed below the inner peripheral surface , and the side guide of the engagement protrusion inserted into the shaft hole At least two positions corresponding to the position in which the wall protrudes and the position in the circumferential direction, from the female body base portion to a part of the female body shaft portion including the upward stepped portion and the tapered inner peripheral surface The side guide along the axial direction of the shaft hole Is formed, and the engaging protrusion is inserted into the shaft hole of the female body with the circumferential position of the side guide wall and the dividing groove corresponding to each other. Further, the upward stepped portion divided by the dividing groove is temporarily expanded and penetrated, so that the downward stepped portion is engaged with the upward stepped portion and the flange portion is brought into the fitting space. When the force in the direction of pulling out the engagement protrusion from the shaft hole is applied after the downward stepped portion is engaged with the upward stepped portion, the upward stepped portion is pressed and the flange portion The side guide wall is inserted into the dividing groove to limit the circumferential rotation of the male body, and the engagement protrusion is The circumferential position of the side guide wall and the dividing groove When the device is inserted into the shaft hole of the female body with the position being displaced, the upward stepped portion is penetrated in a state where the upward stepped portion is spread out, so that the upward stepped portion is formed on the outer peripheral surface of the side guide wall. It is configured to be in a temporarily fixed state by pressure contact.

According to the present invention, the female body is divided into a plurality of divided grooves from the outer surface of the female body base to the part of the female body shaft portion including the upward stepped portion and the tapered inner peripheral surface. The male body is provided with a side guide wall having a diameter that is the same as the diameter of the flange portion and that can be fitted into the dividing groove from the peripheral wall of the male body shaft portion to the side. And the side guide wall and the division | segmentation groove | channel are provided so that the position of the circumferential direction may correspond.
Accordingly, when the male body engaging protrusions are inserted into the shaft holes of the female body so that the circumferential guide positions of the side guide wall and the dividing groove coincide with each other, The upward stepped portion is pushed and penetrated, the downward stepped portion of the male body and the upward stepped portion of the female body are engaged, the flange portion is fitted into the fitting space, and the side guide wall is further fitted into the dividing groove Is inserted.
As a result, after the male body is fixed to the female body, the downward step portion presses the upward step portion when the force in the direction of pulling out the engagement protrusion from the shaft hole and the force rotating the engagement protrusion are applied. At the same time, not only pulling out becomes difficult due to the force of pressing the buttocks from the side, and the rotation of the male body in the circumferential direction is restricted by the side guide walls being inserted into the dividing grooves. .
In addition, when the engagement protrusion is inserted into the shaft hole of the female body with the circumferential position of the side guide wall and the dividing groove being displaced, the flange portion remains in a state where the upward stepped portion is pushed and widened. As a result of penetrating, the upward stepped portion comes into pressure contact with the outer peripheral surface of the side guide wall, resulting in a temporarily fixed state. When a force in the pulling direction is applied again in the temporarily fixed state, the pulling out can be performed only by applying a force exceeding the frictional force in which the upward stepped portion presses the outer peripheral surface of the side guide wall. On the other hand, by rotating the male shaft portion from the temporarily fixed state to eliminate the positional deviation, the side guide wall is fitted into the dividing groove and the upward step portion and the downward step portion are engaged with each other. Fixing is realized.

In the above invention, the male body and the female body may be integrally connected through a deformable connecting member.

Can be held and a male body and a female body in a pair with this, it is possible to prevent problems such as either of the male body or a female body can no longer be kept insufficient.

Claims (4)

A fastener comprising a male body and a female body,
The male body has a plate-shaped male body base, a male body shaft erected from the inner surface of the male body base, and has a larger diameter than the peripheral wall of the male body shaft portion and forms a downward stepped portion. A flange extending at the distal end of the male body shaft, and protruding laterally from the positions of at least two circumferential walls spaced apart from each other so as to have the same diameter as the flange; And an engagement protrusion provided with a side guide wall that connects the male base portion along the axial direction,
The female body includes a plate-shaped female body base and a female body shaft portion that is erected from an inner surface of the female body base portion and has a diameter larger than the collar portion of the male body, and penetrates the female body shaft portion. A shaft hole is formed in the outer surface of the female base and into which the engagement protrusion is inserted. The shaft hole has a smaller inner diameter than the diameter of the flange, and the stepped downward portion of the flange An upward stepped portion that engages with the flange portion, and a fitting space having a diameter into which the flange portion is fitted, and a position where the side guide wall of the engaging protrusion that is inserted into the shaft hole protrudes And at least two positions corresponding to the positions in the circumferential direction, along the axial direction of the shaft hole, from the female body base portion through the upward stepped portion to a part of the female body shaft portion, A dividing groove having a groove width into which the side guide wall can be fitted is formed,
The engaging protrusion is an upward stepped portion that is divided by the dividing groove when the engaging projection is inserted into the shaft hole of the female body with the circumferential position of the side guide wall and the dividing groove corresponding to each other. Is temporarily expanded and penetrated so that the downward stepped portion is engaged with the upward stepped portion and the flange portion is fitted into the fitting space,
After the downward stepped portion is engaged with the upward stepped portion, when a force in the direction of pulling out the engaging projection from the shaft hole is applied, the upward stepped portion is pressed and the flange portion is laterally moved. It is configured so that the pressure force works,
Further, the side guide wall is inserted into the dividing groove, and the circumferential rotation of the male body is limited.
When the engaging protrusion is inserted into the shaft hole of the female body in a state where the circumferential position between the side guide wall and the dividing groove is shifted, the upward stepped portion is pushed and widened. A fastener that is configured such that the stepped portion is pressed into contact with the outer peripheral surface of the side guide wall so as to be in a temporarily fixed state by penetrating as it is.   The taper-shaped inner peripheral surface is formed in the shaft hole of the female body along the axial direction from the upward stepped portion to the groove bottom of the dividing groove. The described fasteners.   The fastener according to claim 1 or 2, wherein the male body and the female body are integrally connected via a deformable coupling member.   The fastener according to any one of claims 1 to 3, wherein a hook mechanism is attached to at least one of the male body, the female body, or the connecting member.

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