JP6987660B2 - Bracket fitting structure - Google Patents

Description

The present invention relates to a bracket fitting structure.

Conventionally, a bracket fitting structure has been proposed in which a metal bracket is inserted into a bracket introduction portion of a resin component and the metal bracket and the resin component are prevented from coming off by a predetermined means to fit the metal bracket and the resin component. In such a bracket fitting structure, it is known to form a tapered surface with respect to the bracket introduction portion in order to improve the insertability of the metal bracket with respect to the bracket introduction portion (see, for example, Patent Documents 1 and 2). ..

Further, in order to prevent play when the metal bracket is inserted into the bracket introduction portion and fitted, the gap of the bracket introduction portion can be made smaller than the plate thickness of the metal bracket (see, for example, Patent Document 3). ..

Japanese Unexamined Patent Publication No. 2009-270686 Japanese Unexamined Patent Publication No. 2017-11810 Japanese Unexamined Patent Publication No. 2013-1438226

Here, in the bracket fitting structure described in Patent Document 3, since the gap of the bracket introduction portion is smaller than the plate thickness of the metal bracket, it is necessary to make it easier to insert the metal bracket. Therefore, it is conceivable to chamfer the corner portion on the tip side of the metal bracket. However, in this case, a step of chamfering the corner portion on the tip side is added, which leads to an increase in cost. On the other hand, if chamfering is not performed, even if a tapered surface is formed at the bracket introduction portion, the corner portion (particularly the edge formed during press working) will be caught on the tapered surface, making insertion extremely difficult. ..

The present invention has been made to solve such a problem, and an object thereof is to chamfer the metal bracket when the gap of the bracket introduction portion is smaller than the plate thickness of the metal bracket. It is an object of the present invention to provide a bracket fitting structure which is not necessary and can improve the insertability of a metal bracket.

The bracket fitting structure according to the present invention is a structure in which a metal bracket is inserted and fitted to the bracket introduction portion. When viewed from the side of the metal bracket, the tip portion on one surface side is a guide surface formed during press working, and the tip portion on the other surface side is an edge having a corner portion. The resin component has tapered surfaces for guiding the metal bracket to the bracket introduction portion on both one side and the other side of the metal bracket, and the tapered surface on one side is a predetermined distance from the tapered surface on the other side. It is formed deep inside.

According to the present invention, in the metal bracket, the tip portion on one surface side is a guide surface formed during press working, the tip portion on the other surface side is an edge having a corner portion, and the resin component is on one surface. The tapered surface on the side is formed so as to be recessed by a predetermined distance from the tapered surface on the other surface side. Therefore, when the metal bracket is inserted into the bracket introduction part, if the edge of the metal bracket comes into contact with the tapered surface on the other side, the tapered surface on one side is deeper than the tapered surface on the other side. Therefore, the guide surface does not come into contact with the tapered surface on the one side, and the edge is guided to slide on the tapered surface on the other side. After that, since the guide surface comes into contact with the tapered surface on one side, the metal bracket can be inserted into the bracket introduction portion by using the guide surface formed during press working without chamfering the metal bracket. .. Therefore, when the gap of the bracket introduction portion is smaller than the plate thickness of the metal bracket, it is not necessary to perform chamfering on the metal bracket, and the insertability of the metal bracket can be improved.

It is a perspective view which shows the bracket fitting structure which concerns on this embodiment. It is sectional drawing which shows the bracket fitting structure which concerns on this embodiment. It is an enlarged side view which shows the tip side of a metal bracket. FIG. 3 is an enlarged cross-sectional view of a main part showing the resin component shown in FIG. 2. It is sectional drawing which shows the bracket fitting structure which concerns on 1st comparative example. It is a perspective view which shows the metal bracket which concerns on 1st comparative example. It is sectional drawing of the main part which shows the bracket fitting structure which concerns on 2nd comparative example. It is the first cross-sectional view of the main part which shows the state when the metal bracket which concerns on this embodiment is inserted into the bracket introduction part. It is the 2nd main part sectional drawing which shows the state when the metal bracket which concerns on this embodiment is inserted into a bracket introduction part. FIG. 3 is a cross-sectional view of a third main part showing a state when the metal bracket according to the present embodiment is inserted into the bracket introduction portion.

Hereinafter, the present invention will be described with reference to preferred embodiments. The present invention is not limited to the embodiments shown below, and can be appropriately modified without departing from the spirit of the present invention. Further, in the embodiments shown below, there are some parts where the illustration and explanation of the configuration are omitted, but the details of the omitted technology are within the range where there is no contradiction with the contents described below. Needless to say, publicly known or well-known techniques are applied as appropriate.

FIG. 1 is a perspective view showing a bracket fitting structure according to the present embodiment, and FIG. 2 is a cross-sectional view showing the bracket fitting structure according to the present embodiment. As shown in FIGS. 1 and 2, the bracket fitting structure 1 includes a metal bracket 10 and a resin component 20, and is a structure for fitting them.

The metal bracket 10 is a conductive metal plate material formed with a predetermined plate thickness T (see FIG. 2). The metal bracket 10 is formed with a through hole 11 (see FIG. 1) penetrating from one side to the other on the tip side (a portion inserted into a bracket introduction portion described later).

FIG. 3 is an enlarged side view showing the tip end side of the metal bracket 10. As shown in FIG. 3, the metal bracket 10 according to the present embodiment is formed by press working and is not chamfered. Here, when the metal bracket 10 is formed by press working with the other end surface side of the metal plate placed on the lower mold, the tip portion on the one surface side (that is, the upper mold side) is slightly bent when viewed from the side. It becomes R-shaped and the guide surface 12 is formed. On the other hand, the tip portion on the other surface side becomes a corner portion during press working to form an edge 13.

The resin component 20 shown in FIGS. 1 and 2 is a component made of an insulating resin having a bracket introduction portion 21 into which the metal bracket 10 is inserted. Such a resin component 20 has tapered surfaces 22 and 23 for guiding the metal bracket 10 to the bracket introduction portion 21. The tapered surfaces 22 and 23 are inclined surfaces formed on the introduction port 24 side of the metal bracket 10 of the bracket introduction portion 21, and are formed corresponding to both one side and the other side of the metal bracket 10. There is. The tapered surfaces 22 and 23 are inclined surfaces that extend toward the introduction port 24 in order to guide the metal bracket 10. Further, as shown in FIG. 2, the bracket introduction portion 21 is formed so that the gap S is smaller than the plate thickness T of the metal bracket 10. Therefore, when the metal bracket 10 is inserted into the bracket introduction portion 21 and then fitted, the structure is such that backlash is prevented.

Further, as shown in FIG. 2, the resin component 20 has a locking claw 25 and an elastic piece 26 in the bracket introduction portion 21. The locking claw 25 is a protruding piece into which the through hole 11 of the metal bracket 10 is fitted when the metal bracket 10 is inserted into the bracket introduction portion 21. When the locking claw 25 is fitted into the through hole 11, the metal bracket 10 and the resin component 20 are fitted together. The elastic piece 26 elastically supports the locking claw 25. The elastic piece 26 is provided on one side of the bracket introduction portion 21, and the locking claw 25 projects from the elastic piece 26 toward the other side. Further, the locking claw 25 is formed with an inclined surface 25a inclined in the same direction as the tapered surface 22 on one surface side on the introduction port 24 side.

FIG. 4 is an enlarged cross-sectional view of a main part showing the resin component 20 shown in FIG. As shown in FIG. 4, in the present embodiment, the tapered surface 22 on the one side is formed so as to be recessed by a predetermined distance L1 from the tapered surface 23 on the other side. This predetermined distance L1 is longer than the longitudinal distance L2 of the metal bracket 10 on the guide surface 12 shown in FIG. 3 (radius of curvature R when the guide surface 12 has a substantially arc shape).

Next, the operation of the bracket fitting structure according to the present embodiment will be described, but prior to this, the operation of the bracket fitting structure according to the first comparative example and the second comparative example will be described.

FIG. 5 is a cross-sectional view showing a bracket fitting structure according to the first comparative example, and FIG. 6 is a perspective view showing a metal bracket according to the first comparative example. As shown in FIGS. 5 and 6, the metal bracket 110 according to the first comparative example has inclined surfaces 111 and 112 which are chamfered on both one side and the other side when viewed from the side. As shown in FIG. 5, the resin component 120 has tapered surfaces 122 and 123 for guiding the metal bracket 110 to the bracket introduction portion 121, but one of them is formed in the same row without being deeper than the other. Has been done.

In such a first comparative example, since the metal bracket 110 is chamfered, the inclined surfaces 111 and 112 abut on the tapered surfaces 122 and 123, and even if the bracket introduction portion 121 is a plate of the metal bracket 110. Even if it is smaller than the thickness, smooth insertion is performed.

However, in the case of the bracket fitting structure 100 according to the first comparative example, it is necessary to add a chamfering process to the press working process of the metal bracket 110, which leads to an increase in cost.

FIG. 7 is a cross-sectional view of a main part showing the bracket fitting structure according to the second comparative example. The metal bracket 210 according to the second comparative example is not chamfered as in the first comparative example. Therefore, the tip portion on one surface side is the guide surface 211 formed during press working, and the tip portion on the other surface side becomes a corner portion during press working to form the edge 212.

However, in the second comparative example, since the metal bracket 210 is not chamfered, as shown in FIG. 7, the guide surface 211 comes into contact with the tapered surface 222 on one side and the edge 212 is tapered on the other side. Contact surface 223. If the metal bracket 210 is to be inserted into the bracket introduction portion 221 in this state, the edge 212 will be caught on the tapered surface 223 on the other surface side, and the insertion will be extremely difficult.

8 to 10 are cross-sectional views of a main part showing a state when the metal bracket 10 according to the present embodiment is inserted into the bracket introduction portion 21. First, as shown in FIG. 8, in the resin component 20 according to the present embodiment, since the tapered surface 22 on one side is deeper than the tapered surface 23 on the other side, for example, the edge 13 of the metal bracket 10 is other. It contacts the tapered surface 23 on the surface side. However, at this point, unlike the case shown in FIG. 7, the guide surface 12 is not in contact with the tapered surface 22 on one side, and the metal bracket 10 is on the bracket introduction portion 21 side along the tapered surface 23 on the other side. Will move to (see arrow A).

After that, when the edge 13 gets over the tapered surface 23 on the other surface side, as shown in FIG. 9, the other surface of the metal bracket 10 is placed on the other surface 21a of the bracket introduction portion 21. Then, when the metal bracket 10 is further pushed in with the metal bracket 10 placed in the mounted state, the guide surface 12 of the metal bracket 10 comes into contact with the tapered surface 22 on the one side. Here, in the present embodiment, the tapered surface 22 on one side is recessed by a predetermined distance L1 from the tapered surface 23 on the other side, and the predetermined distance L1 is larger than the longitudinal distance L2 of the metal bracket 10 on the guide surface 12. Since the size is increased, it is appropriately prevented that the guide surface 12 comes into contact with the tapered surface 22 on the one surface side before the edge 13 gets over the tapered surface 23 on the other surface side.

When the metal bracket 10 is further pushed in with the guide surface 12 in contact with the tapered surface 22 on the one side, the metal bracket 10 is smoothly inserted by the cooperation between the guide surface 12 and the tapered surface 22 on the one side.

After that, as shown in FIG. 10, the metal bracket 10 reaches the locking claw 25. The locking claw 25 projects from the elastic piece 26 on one side to the other side, and has an inclined surface 25a inclined in the same direction as the tapered surface 22 on the one side. Therefore, the inclined surface 25a of the locking claw 25 and the guide surface 12 come into contact with each other to elastically deform the elastic piece 26, and the edge 13 is inserted more smoothly than in the case where the edge 13 abuts on the inclined surface 25a. The Rukoto.

Then, when the locking claw 25 is fitted into the through hole 11 (see FIG. 1) of the metal bracket 10, the fitting is completed. In the above description, an example in which the metal bracket 10 contacts the tapered surface 23 on the other surface side and then contacts the tapered surface 22 on the one surface side at the time of insertion has been described. However, not limited to this, when the metal bracket 10 is inserted, it may first come into contact with the tapered surface 22 on the one side that is deeper than the tapered surface 23 on the other side, and may be inserted as it is. In this case, since the state of FIG. 9 is reached without going through the state of FIG. 8, the metal bracket 10 is smoothly inserted.

In this way, according to the bracket fitting structure 1 according to the present embodiment, the metal bracket 10 has a guide surface 12 whose tip portion on one surface side is formed during press working, and the tip portion on the other surface side. Is an edge 13 having a corner portion, and the resin component 20 is formed so that the tapered surface 22 on one side is recessed by a predetermined distance L1 from the tapered surface 23 on the other side. Therefore, when the metal bracket 10 is inserted into the bracket introduction portion 21, if the edge 13 of the metal bracket 10 comes into contact with the tapered surface 23 on the other side, the tapered surface 22 on the one side becomes the tapered surface on the other side. Since it is deeper than 23, the guide surface 12 does not come into contact with the tapered surface 22 on the one side, and the edge 13 is guided to slide on the tapered surface 23 on the other side. After that, since the guide surface 12 comes into contact with the tapered surface 22 on the one side, the metal bracket 10 can be introduced into the bracket introduction portion 21 by using the guide surface 12 formed during the press working without chamfering the metal bracket 10. Can be inserted into. Therefore, when the gap S of the bracket introduction portion 21 is smaller than the plate thickness T of the metal bracket 10, it is not necessary to chamfer the metal bracket 10, and the insertability of the metal bracket 10 can be improved.

Further, since the predetermined distance L1 is longer than the longitudinal distance L2 of the metal bracket 10 on the guide surface 12, the deep distance of the tapered surface 22 on one surface side is too small, and the edge 13 is on the other surface side. The metal bracket 10 can be appropriately inserted by preventing the guide surface 12 from coming into contact with the tapered surface 22 on the one side before getting over the tapered surface 23.

Further, the metal bracket 10 has a through hole 11, and the resin component 20 has a locking claw 25 into which the through hole 11 fits in the bracket introduction portion 21, and the locking claw 25 is in the same direction as the tapered surface 22 on one side. The metal bracket 10 has an inclined surface 25a, and when the metal bracket 10 is inserted into the bracket introduction portion 21, the guide surface 12 of the metal bracket 10 and the inclined surface 25a come into contact with each other. Therefore, when the metal bracket 10 is inserted into the bracket introduction portion 21, the possibility that the tip portion of the metal bracket 10 gets caught on the locking claw 25 after being inserted over the tapered surfaces 22 and 23 is reduced. Therefore, it can contribute to smoother fitting.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and changes may be made without departing from the spirit of the present invention. It may be combined.

For example, in the above embodiment, the metal bracket 10 is a flat plate in the bracket fitting structure 1, but the metal bracket 10 is not limited to this, and is not limited to this. It may be.

1: Bracket fitting structure 10: Metal bracket 12: Guide surface 13: Edge 20: Resin part 21: Bracket introduction part 22: Tapered surface on one side 23: Tapered surface on the other side 25: Locking claw 25a: Inclined surface 26: Elastic piece L1: Predetermined distance L2: Longitudinal distance S: Gap T: Plate thickness

Claims (3)

A metal bracket formed with a predetermined plate thickness and a resin component having a bracket introduction portion formed with a gap smaller than the plate thickness of the metal bracket are provided, and the metal bracket is provided with respect to the bracket introduction portion. It is a bracket fitting structure that is inserted and fitted.
When viewed from the side of the metal bracket, the tip on one side is a guide surface formed during press working, and the tip on the other side is an edge with corners.
The resin component has a tapered surface for guiding the metal bracket to the bracket introduction portion on both the one side and the other side of the metal bracket, and the tapered surface on the one side is the other side. Bracket fitting structure characterized by being formed by a predetermined distance deeper than the tapered surface of. The bracket fitting structure according to claim 1, wherein the predetermined distance is longer than the longitudinal distance of the metal bracket on the guide surface. The metal bracket has a through hole penetrating from the one side to the other side in a portion inserted into the bracket introduction portion.
The resin component has a locking claw into which the through hole is fitted when the metal bracket is inserted, and an elastic piece that elastically supports the locking claw in the bracket introduction portion.
The locking claw has an inclined surface inclined in the same direction as the tapered surface on the one side, and when the metal bracket is inserted into the bracket introduction portion, the guide surface and the inclined surface of the metal bracket are used. The bracket fitting structure according to claim 1 or 2, wherein the brackets are in contact with each other.

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