JP2014177998A - Structure for fixing case to plate-like member to be fixed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for fixing a case to a plate-like member to be fixed capable of preventing a case fixing protrusion inserted into a fixing hole of the plate-like member to be fixed from being damaged even in the case that the case is loosened by vibration.SOLUTION: This invention relates to a structure 1 for fixing a case to a plate-like plate to be fixed in which the case 10 is fixed to the plate-like member 50 to be fixed by a method in which a fixing protrusion part 40 protruded out of a case outer surface 20b of the case 10 is inserted into a fixing hole 51 formed to pass through the plate-like member 50 to be fixed that becomes an object to be fixed of the case 10. The plate-like member 50 to be fixed has a hole inner edge surface extending wall part 60 including a protrusion direction hole extending surface 60b formed in such a way that a hole inner edge surface 51a of the fixing hole 51 is extended from an outputting side surface 50a of the plate-like member 50 at a side where the fixing protrusion part 40 is outputted, along an inserting direction of the fixing protrusion part 40.

Description

  The present invention relates to a fixing structure of a case and an attachment plate member that is fixed to the attachment plate member.

  2. Description of the Related Art Conventionally, for example, a case that constitutes an outline of an electrical junction box mounted on a vehicle or a case that constitutes an outline of a wire harness support is fixed to a mounting plate member such as a vehicle body panel as an attachment destination. As a fixing structure between the mounting plate member and the mounting plate member, in addition to fixing by bolt tightening, a fixing protruding portion protruding from the outer surface of the case is inserted into a fixing hole formed in the mounting plate member As a result, there is one in which the case is fixed to the mounting plate member (see, for example, Patent Document 1).

JP2012-13132A

  However, the fixing structure between the case and the mounting plate member described in Patent Document 1 is that when the case is rattled due to vibration of a vehicle or the like, the fixing protrusion comes into contact with the edge of the fixing hole and cuts off. As a result, there is a risk of damage.

  The present invention has been made in view of the above, and even when the case has rattled due to vibration, the fixing protrusion of the case inserted through the fixing hole of the mounting plate member is damaged. It is an object of the present invention to provide a fixing structure between a case and a mounting plate member that can be prevented.

  In order to solve the above-described problems and achieve the object, the fixing structure of the case and the mounting plate member according to claim 1 of the present invention has a fixing protrusion formed by protruding from the case outer surface of the case. A case in which the case is fixed to the attachment destination plate-like member and the attachment destination plate-like member by being inserted through a fixing hole formed so as to penetrate the attachment destination plate-like member that is the attachment destination of the case In the fixing structure, the attachment plate-like member extends along the insertion direction of the fixing protrusion from the insertion side surface which is the surface of the attachment plate-like member on the side where the fixing projection is inserted. It has a hole inner edge surface extending wall portion including a protruding direction hole extending surface formed so that the hole inner edge surface of the fixing hole extends.

  According to a second aspect of the present invention, there is provided the fixing structure between the case and the mounting plate member in the above invention, wherein the fixing protrusion is in a state where the fixing protrusion is completely inserted into the fixing hole. And at least a part of the outer peripheral surface of the protrusion extends along the hole inner edge surface with a slight gap from the hole inner edge surface so that the shaft is held in the fixing hole. An insertion direction extending surface is formed to extend so as to protrude in the insertion direction from the end edge surface of the hole inner edge surface extending wall portion.

  The fixing structure between the case and the mounting plate member according to claim 3 of the present invention is the above invention, wherein the hole inner edge surface extending wall portion is subjected to burring processing on the mounting plate member. It is characterized by being formed by.

  According to a fourth aspect of the present invention, there is provided the fixing structure between the case and the mounting plate member in the above invention, wherein the fixing protrusion is positioned in the fixing hole. When it is elastically deformed so as to fit in and is inserted from the end edge surface of the hole inner edge surface extending wall portion, it is elastically restored so as to be expanded in the radial direction of the fixing hole, thereby It is characterized by having a retaining portion that functions to retain from the fixing hole.

  The fixing structure between the case and the mounting plate member according to claim 1 of the present invention is such that the mounting plate is fixed even when the fixing protrusion rattles in the fixing hole due to vibration. The surface with which the member is brought into contact with the fixing protrusion is enlarged by the protrusion-direction hole extending surface of the hole inner edge surface extending wall portion, so that the attachment plate-like member becomes the fixing protrusion. Since the force applied upon contact is dispersed, the fixing protrusion of the case inserted through the fixing hole of the mounting plate member is damaged even when the case is shaken by vibration. Can be prevented.

  The fixing structure between the case and the mounting plate member according to claim 2 of the present invention holds the fixing protrusion along the insertion direction by the protrusion direction hole extending surface of the hole inner edge surface extending wall portion. Since the surface to be expanded is enlarged, the fixing protrusion is difficult to be removed from the fixing hole, and the extending surface in the inserting direction protrudes in the inserting direction from the end surface of the extending wall portion of the hole. As a result, it is possible to effectively prevent the case from rattling.

  The fixing structure between the case and the mounting plate member according to claim 3 of the present invention is formed integrally with the mounting plate member by burring the inner edge surface extending wall portion. A simple configuration can be achieved.

  In the fixing structure between the case and the attachment plate member according to the fourth aspect of the present invention, the fixing protrusion can be reliably prevented from coming out of the fixing hole by the stopper.

FIG. 1 is a perspective view of a fixing structure between a case and a mounting plate member according to an embodiment of the present invention when the periphery of the fixing protrusion is viewed from the surface of the mounting plate member on the side where the fixing protrusion is inserted. FIG. FIG. 2 is a cross-sectional view of the fixing structure between the case and the attachment plate member shown in FIG. 3 is a perspective view of the case shown in FIG. FIG. 4 is a top view of the case shown in FIG. FIG. 5 is a diagram for explaining that the movement of the case in the rotation direction is suppressed. FIG. 6 shows a fixing structure between a case and a mounting plate member according to a modification of the embodiment of the present invention, from the surface of the mounting plate member on the side where the fixing protrusion is inserted, to the periphery of the fixing protrusion. FIG. FIG. 7 is a cross-sectional view taken along line AA of the fixing structure between the case and the attachment plate member shown in FIG. FIG. 8 is a cross-sectional view of a fixing structure between a case and an attachment plate-like member according to a second modification of the fixing structure between the case and the attachment plate-like member according to the embodiment of the present invention.

  Hereinafter, with reference to the drawings, a preferred embodiment of a fixing structure between a case and a mounting plate member according to the present invention will be described in detail.

FIG. 1 shows a fixing structure 1 between a case and a mounting plate member according to an embodiment of the present invention, from the surface of the mounting plate member 50 on the side where the fixing projection 40 is inserted, to the periphery of the fixing projection 40. It is the perspective view which looked at. 2 is a cross-sectional view taken along line AA of the fixing structure 1 between the case and the attachment plate member shown in FIG. FIG. 3 is a perspective view of the case 10 shown in FIG. FIG. 4 is a top view of the case 10 shown in FIG. FIG. 5 is a diagram for explaining that the movement of the case 10 in the rotational direction is suppressed.
A fixing structure 1 between a case and a mounting plate-like member according to an embodiment of the present invention constitutes, for example, an outline of an electrical junction box mounted on a vehicle, and contains electrical components such as fuses therein. The case 10 is fixed to a mounting plate member 50 such as a vehicle body panel.
In the fixing structure 1 between the case and the mounting plate member, the fixing protrusion 40 that is protruded from the case outer surface 20b of the case 10 penetrates the mounting plate member 50 that is the mounting destination of the case 10. The case 10 is fixed to the mounting plate member 50 by being inserted into the fixing hole 51 having an elliptical cross section formed in the above.

First, the mounting plate member 50 will be described.
The attachment destination plate-like member 50 is a vehicle body panel made of a metal plate-like member, and the fixing projection 40 from the insertion side surface 50a which is the surface of the attachment destination plate-like member 50 on the side where the fixation projection 40 is inserted. The hole inner edge surface extending wall portion 60 includes a protrusion direction hole extending surface 60b formed so that the hole inner edge surface 51a of the fixing hole 51 extends along the insertion direction.

The hole inner edge surface extending wall portion 60 is integrally provided on the attachment destination plate-like member 50 by, for example, being formed by a burring process that is a process of forming a rising portion around the hole.
The hole inner edge surface extending wall portion 60 is adjusted such that the length from the base end portion to the end edge surface in the insertion direction of the fixing projection 40 is at least twice the plate thickness of the mounting plate member 50. Become.

  By forming such a protruding direction hole extending surface 60b flush with the inner edge surface 51a of the fixing hole 51, the area of the portion of the mounting plate member 50 that contacts the fixing protrusion 40 is reduced. It has been expanded.

  Note that the length from the base end portion of the hole inner edge surface extending wall portion 60 to the end edge surface is not limited to more than twice the plate thickness of the mounting plate member 50, and is adjusted as appropriate according to the processing method and the like. Good.

Next, the case 10 will be described.
As shown in FIGS. 3 and 4, the case 10 is made of a box-shaped synthetic resin, and an accommodation space for accommodating electrical equipment is formed therein. The case 10 is configured to be separable into an upper case main body 20 and a lower lower cover 30 in consideration of ease of assembly. Further, the upper opening 20a is blocked by a lid (not shown).
In addition, the case 10 includes an electric wire drawing port 11 that serves as an electric wire drawing port for a wire harness (not shown), two bolt fixing portions 21 and 21 for enabling fixing with bolts, and a pair of spacer portions. 22 and 22 and a fixing projection 40.

  The electric wire lead-in port 11 is an opening that is disposed at the joint of the case main body 20 and the lower cover portion 30 and in which an electric wire (not shown) is drawn into the accommodation space 10a.

  Each bolt fixing portion 21 is formed with a bolt insertion hole 21b through which a bolt (not shown) is inserted into a bracket portion 21a made of a wall protruding from the outer surface of the case main body portion 20.

The pair of spacer portions 22, 22 is a so-called spacer for providing a predetermined interval between the case 10 and the attachment destination plate-like member 50 when the case 10 and the attachment destination plate-like member 50 are fixed. It is a part that functions, and is provided on the case outer surface 20b of the case body 20 with the fixing protrusion 40 therebetween.
The protruding end surface 22a of each spacer portion 22 is in contact with the case outer surface 20b in a state where the case 10 and the mounting plate member 50 are fixed, so that the case 10 of the case outer surface 20b and the mounting plate member 50 are fixed. A space is provided between the side surface and the side surface by the height of the spacer portion 22.

The fixing protrusion 40 is formed on at least a part of the outer peripheral surface 41 of the protrusion so that the fixing protrusion 40 is held in the fixing hole 51 with the axis aligned with the fixing hole 51 in a state of being inserted into the fixing hole 51. It extends along the hole inner edge surface 51a with a slight gap from the hole inner edge surface 51a, and extends so as to protrude from the end edge surface 60a of the hole inner edge surface extending wall portion 60 in the insertion direction. The extending surface 42a in the insertion direction is formed.
More specifically, the fixing protrusion 40 is formed by forming two pairs of guide protrusions 42 that protrude in directions opposite to each other in the direction orthogonal to the axis along the protrusion outer peripheral surface 41. The projecting end surface 42 is formed along the hole inner edge surface 51 a with a slight gap from the hole inner edge surface 51 a of the fixing hole 51.
By the two pairs of guide protrusions 42, the fixing protrusion 40 is held in the fixing hole 51 with the axis aligned with the fixing hole 51.
Further, the protruding end surface of each guide protruding portion 42 constitutes an insertion direction extending surface 42a.

  As shown in FIG. 5, the insertion direction extending surface 42a extends so as to protrude from the end edge surface 60a of the hole inner edge surface extending wall portion 60 in the insertion direction. Even in the case where 10 is shaky in the rotation direction, the insertion direction extending surface 42a which is only slightly spaced from the hole inner edge surface 51a is brought into contact with the hole inner edge surface extending wall portion 60, so that the case 10 The movement in the rotation direction (arrow direction in FIG. 5) is suppressed.

Further, of the two pairs of guide protrusions 42, the pair of guide protrusions 42 are provided with a retaining portion 43.
The retaining portion 43 of each guide protrusion 42 is a portion having a retaining function for preventing the fixing protrusion 40 from being removed from the fixing hole 51.
When the retaining portion 43 is positioned in the fixing hole 51, the retaining portion 43 is elastically deformed so as to be accommodated in the fixing hole 51, and is inserted from the end edge surface 60a of the hole inner edge surface extending wall portion 60. The portion that is elastically restored so as to expand in the radial direction of the fixing hole 51.

More specifically, the retaining portion 43 has a cantilever structure in which the front end portion is a fixed end and the rear end is a free end, and is inserted from the end edge surface 60 a of the hole inner edge surface extending wall portion 60. The rear end edge surface 43a, which is a free end in the state of being elastically restored, is arranged to face the end edge surface 60a of the hole inner edge surface extending wall portion 60.
For this reason, when the fixing protrusion 40 is moved in a direction away from the fixing hole 51 in a state where the retaining part 43 is inserted from the end edge surface 60a of the hole inner edge surface extending wall part 60, the retaining part 43 is prevented. The rear end edge surface 43 a of the portion 43 is abutted against the end edge surface 60 a of the hole inner edge surface extending wall portion 60, and the movement of the case 10 is restricted, so that the fixing protrusion 40 is removed from the fixing hole 51. It is prevented from coming out.

  The fixing structure 1 between the case and the mounting plate member according to the embodiment of the present invention is a mounting plate member even when the fixing protrusion 40 rattles in the fixing hole 51 due to vibration. The surface where 50 is brought into contact with the fixing projection 40 is enlarged by the projection direction hole extending surface 60b of the hole inner edge surface extending wall 60, so that the attachment plate-like member 50 becomes the fixing projection 40. Since the force applied at the time of contact is dispersed, even when the case 10 rattles due to vibration, the fixing protrusion of the case 10 inserted through the fixing hole 51 of the mounting plate member 50 It is possible to prevent 40 from being damaged.

  Further, the fixing structure 1 between the case and the mounting plate member according to the embodiment of the present invention is configured such that the fixing protrusion 40 is aligned in the insertion direction by the protrusion direction hole extending surface 60b of the hole inner edge surface extending wall part 60. Since the holding surface is enlarged, the fixing protrusion 40 is difficult to be removed from the fixing hole 51, and the insertion direction extending surface 42a is inserted more than the end edge surface 60a of the hole inner edge surface extending wall portion 60. Since it protrudes in the direction, it is possible to effectively suppress the case 10 from rattling in the rotational direction.

  Further, the fixing structure 1 between the case and the mounting plate member according to the embodiment of the present invention is formed integrally with the mounting plate member 50 by performing the burring process on the hole inner edge surface extending wall portion 60. Therefore, a simple configuration can be achieved.

  In addition, the fixing structure 1 between the case and the mounting plate member according to the embodiment of the present invention can reliably prevent the fixing protrusions 40 from coming out of the fixing holes 51 by the stoppers 43.

(Modification 1)
Next, Modification 1 of the fixing structure 1 between the case and the mounting plate member according to the embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 shows a fixing structure 2 between the case and the mounting plate member according to the first modification of the embodiment of the present invention, for fixing from the surface of the mounting plate member 50 on the side where the fixing protrusion 70 is inserted. It is the perspective view which looked at the projection part 70 periphery. FIG. 7 is a cross-sectional view taken along line AA of the fixing structure 2 between the case and the attachment plate member shown in FIG.
The fixing structure 2 between the case and the mounting destination plate-like member of this modification 1 is the same as the fixing structure 1 between the case and the mounting destination plate-like member of the embodiment in that the fixing projection 70 does not have the retaining portion 43. Different.
Other configurations are the same as those in the embodiment, and the same components as those in the embodiment are denoted by the same reference numerals.

  The fixing protrusion 70 is held in the fixing hole 51 with its axis aligned with the fixing hole 51 in a state where the fixing protrusion 70 is completely inserted into the fixing hole 51, similarly to the fixing protrusion 40 of the embodiment. As described above, at least a part of the outer peripheral surface 71 of the protrusion extends along the hole inner edge surface 51a with a slight gap from the hole inner edge surface 51a, and more than the end edge surface 60a of the hole inner edge surface extending wall portion 60. An insertion direction extending surface 72a is formed to extend so as to protrude in the insertion direction.

  The fixing structure 2 between the case and the mounting plate member in the first modification is similar to the fixing structure 1 between the case and the mounting plate member in the embodiment. Even in the case of rattling, the surface with which the mounting plate member 50 is brought into contact with the fixing projection 70 is enlarged by the projection direction hole extending surface 60b of the hole inner edge surface extending wall portion 60. Accordingly, the force applied when the attachment destination plate-like member 50 is brought into contact with the fixing projection 70 is dispersed. Therefore, even if the case 10 is rattled by vibration, the attachment destination plate-like member It is possible to prevent the fixing protrusions 70 of the case 10 inserted through the 50 fixing holes 51 from being damaged.

  Further, the fixing structure 2 between the case and the mounting destination plate-like member of the first modification is similar to the fixing structure 1 between the case and the mounting destination plate-like member of the embodiment, and the protrusion of the hole inner edge surface extending wall portion 60. Since the surface for holding the fixing projection 70 along the insertion direction is enlarged by the direction hole extending surface 60b, the fixing projection 70 is difficult to be removed from the fixing hole 51, and the insertion direction extending surface 72a is used. Projecting in the insertion direction from the end edge surface 60a of the hole inner edge surface extending wall portion 60, it is possible to effectively prevent the case 10 from rattling.

(Modification 2)
Next, a modified example 2 of the fixing structure 1 between the case and the mounting plate member according to the embodiment of the present invention will be described with reference to FIG. FIG. 8 is a cross-sectional view of the fixing structure 3 between the case and the attachment plate-shaped member of Modification 2 of the fixing structure 1 between the case and the attachment plate-shaped member according to the embodiment of the present invention.
In the fixing structure 1 between the case and the attachment plate member in the embodiment, the attachment plate member 50 is a vehicle body panel. However, the fixing structure between the case and the attachment plate member in the second modification example. 3 is different from the fixing structure 1 between the case and the attachment plate member in the embodiment in that the attachment plate member 80 is a bracket attached to the vehicle body panel.
Other configurations are the same as those in the embodiment, and the same components as those in the embodiment are denoted by the same reference numerals.

The attachment destination plate-like portion 80 is, like the attachment destination plate-like portion of the embodiment, a fixing projection portion from the insertion side surface 80a that is the surface of the attachment destination plate-like member 80 on the side where the fixing projection portion 40 is inserted. 40 has a hole inner edge surface extending wall portion 90 including a projection direction hole extending surface 90b formed so that the hole inner edge surface 81a of the fixing hole 81 extends along the insertion direction of 40.
In addition, the attachment destination plate-like portion 80 is formed by burring the attachment destination plate-like member 80 with the hole inner edge surface extending wall portion 90 in the same manner as the attachment destination plate-like portion 50 of the embodiment.

  The fixing structure 3 between the case and the mounting plate member in the second modification can achieve the same effects as the fixing structure 1 between the case and the mounting plate member in the embodiment.

  In addition, in the fixing structure 1, 2 and 3 of the case and the mounting plate member according to the embodiment of the present invention, the case 10 is divided into a case main body portion 20, a lower cover portion 30, and a lid portion (not shown). However, the present invention is not limited to this, and may be configured integrally without being divided.

  Further, in the fixing structures 1, 2 and 3 between the case and the mounting plate member according to the embodiment of the present invention, the fixing projections 40 and 70 are substantially oval in cross section, and further the guide protrusion 42. , 72 is illustrated as an example. However, the present invention is not limited to this, and may be a column having a constant cross section. For example, the fixing protrusions 40 and 70 may be cylindrical. In addition, the fixing holes 51 and 81 are not limited to the elliptical cross-sectional shape as long as they have a cross-sectional shape corresponding to the cross-sectional shape of the fixing protrusions 40 and 70, and other shapes are used. It doesn't matter.

  Further, in the fixing structures 1, 2 and 3 between the case and the mounting plate member according to the embodiment of the present invention, the extending direction surfaces 42a and 72a of the fixing projections 40 and 70 are the inner edge surface extending walls. Although the example which extended so that it may protrude in the insertion direction rather than the end edge surfaces 60a and 90a of the parts 60 and 90 was illustrated, not only this but the insertion direction extension surfaces 42a and 72a are hole edge surface extension. The configuration may be such that it does not protrude beyond the edge surfaces 60a, 90a of the wall portions 60, 90. That is, the insertion direction extending surfaces 42a and 72a are inside the end edge surfaces 60a and 90a of the hole inner edge surface extending wall portions 60 and 90, and the end edge surfaces 60a and 90a of the hole inner edge surface extending wall portions 60 and 90 are. Further, the distal end portions of the fixing projections 40 and 70 that protrude further may be formed so as to increase the distance between the hole inner edge surfaces 51a and 81a rather than the insertion direction extending surfaces 42a and 72a. In this case, the effect of preventing the backlash in the rotation direction of the case 10 is reduced as compared with the embodiment.

  In addition, the fixing structures 1, 2 and 3 between the case and the attachment plate member according to the embodiment of the present invention have exemplified the case where the case 10 is used for an electric junction box. Any other case may be used as long as the case is fixed to the mounting plate member. For example, the case 10 may be used for a wire harness support.

  The invention made by the present inventor has been specifically described based on the above-described embodiments of the invention. However, the present invention is not limited to the above-described embodiments of the invention and does not depart from the gist thereof. Various changes can be made.

1, 2 and 3 Fixing structure between case and attachment plate member 10 Case 10a Housing space 11 Electric wire inlet 20 Case body 20a Upper opening 20b Case outer surface 21 Bolt fixing part 21a Bracket part 21b Bolt insertion hole 22 Spacer part 22a Protruding end surface 30 Lower cover portion 40, 70 Fixing projection portion 41, 71 Protrusion outer peripheral surface 42, 72 Guide projection portion 42a, 72a Insertion direction extending surface 43 Retaining prevention portion 43a Rear end edge surface 50, 80 Mounting plate member 50a, 80a Insertion side surface 51, 81 Fixing hole 51a, 81a Hole inner edge surface 60, 90 Hole inner edge surface extending wall 60a, 90a End edge surface 60b, 90b Projection direction hole extending surface

Claims (4)

The fixing protrusion formed by protruding from the case outer surface of the case is inserted into a fixing hole formed so as to penetrate the mounting plate member that is the mounting destination of the case, so that the case is fixed. In the fixing structure of the case fixed to the tip plate member and the mounting tip plate member,
The mounting plate member is
The inner edge surface of the fixing hole extends from the insertion side surface, which is the surface of the attachment plate member on the side where the fixing projection portion is inserted, along the insertion direction of the fixing projection portion. A fixing structure of a case and a mounting plate member characterized by having a hole inner edge surface extending wall portion including a projecting direction hole extending surface formed on the surface. The fixing protrusion is
In the state of insertion into the fixing hole,
At least a part of the outer peripheral surface of the protrusion extends along the hole inner edge surface at a slight distance from the hole inner edge surface so that the shaft is aligned with the fixing hole and held in the fixing hole. And an insertion direction extending surface extending so as to protrude from the end edge surface of the hole inner edge surface extending wall portion in the insertion direction is formed. A fixing structure between the case and the mounting plate member. The hole inner edge surface extending wall portion is:
The fixing structure between the case and the attachment plate member according to claim 1 or 2, wherein the attachment plate member is formed by burring. The fixing protrusion is
When positioned in the fixing hole, it is elastically deformed so as to be accommodated in the fixing hole, and when inserted from the end edge surface of the hole inner edge surface extending wall portion, the diameter of the fixing hole The case according to claim 1, 2 or 3, further comprising a retaining portion that functions to retain from the fixing hole by being elastically restored so as to expand in a direction. Fixing structure with a plate-like member at the mounting destination.

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