JP2010266035A - Fixing structure for component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide fixing structure for a component capable of reducing a manufacturing cost, capable of enhancing workability, and capable of preventing designability from being impaired. <P>SOLUTION: This fixing structure A for fixing the component is structure for fixing the component (plate metal component) 3 onto a resin member (cover member) 1 by a screw 7, and includes an attaching part 11 formed integrally on a reverse face 1a of the resin member 1, and provided with an attaching hole 11g, and a plate-like plate nut 2 freely inserted into and removed from the attaching hole 11g, and formed with a screw hole 2a for screwing the screw 7. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a component fixing structure for fixing a component to a resin member.

  For example, Patent Document 1 discloses a structure in which a part is fixed to a resin member using an insert metal fitting. In this part fixing structure, both the left and right ends of the insert fitting are bent downward, hooking claws are provided at the bent portion, and a square hole for inserting the bent portion of the insert fitting is penetrated through the resin member. Is formed. Further, screw holes into which screws are screwed are formed through the insert fitting, the resin member and the parts, respectively. The bent part of the insert fitting is inserted into the square hole of the resin member, and the hook is hooked on the back surface of the resin member (the surface opposite to the part mounting surface), so that the insert fitting is attached to the resin member. It is fixed. Further, the component is fixed to the resin member by disposing the component from above the insert metal fitting and screwing the screw into the screw holes of the component, the insert metal fitting and the resin member.

JP 2000-114749 A

However, in the component fixing structure described in Patent Document 1, it is necessary to bend a part of the insert fitting in order to provide the hooking claw, so that there is a problem that the manufacturing cost (processing cost) increases.
Further, when removing the insert fitting from the resin member, it is necessary to remove the hook after deforming the hooking claw with a tool, so that there is a problem that workability is poor.
Furthermore, when such a component fixing structure is applied to a resin cover, a square hole is exposed on the surface of the resin cover (a surface exposed to the outside of the housing) and a hooking claw of the insert fitting is exposed. Therefore, there has been a problem that the design of the appearance of the resin cover is impaired.

  The present invention has been developed from such a viewpoint, and it is an object of the present invention to provide a component fixing structure that reduces manufacturing costs, improves workability, and does not impair design.

  In order to solve the above-mentioned problem, the present invention is a component fixing structure for fixing a component to a resin member with a screw, and is formed integrally on the back surface of the resin member and provided with a mounting hole. And a plate-like plate nut that can be inserted into and removed from the mounting hole and is formed with a screw hole for screwing the screw.

  The back surface of the resin member means a “surface not exposed to the outside of the housing”, and the surface of the resin member means “a surface exposed to the outside of the housing”.

According to the present invention, the plate nut into which the screw is screwed is formed in a plate shape and has a simple structure in which the screw hole is formed. And manufacturing cost (processing cost) can be reduced.
Further, since the plate nut can be inserted into and removed from the mounting hole, the plate nut can be taken out from the mounting hole without using a tool, and the workability is good.
Further, the mounting portion is integrally formed on the back surface of the resin member, and a mounting hole for inserting the plate nut is provided in the mounting portion, so that the component is fixed to the surface of the resin member. Since the member is not exposed, the design of the appearance of the resin member is not impaired.

  According to the present invention, manufacturing cost is reduced, workability is improved, and design is not impaired.

It is a perspective view which shows the whole structure of the fixing structure of the component which concerns on 1st embodiment. It is the elements on larger scale of FIG. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is a top view which shows the structure of a sheet metal part and a flange collar. It is an end elevation which shows the structure of the fixing structure of the component which concerns on 2nd embodiment. It is a top view which shows the modification of the attachment hole of sheet metal parts.

  Next, embodiments of the present invention will be described in detail using appropriate drawings. In the description, the same elements are denoted by the same reference numerals, and redundant description is omitted.

(First embodiment)
The component fixing structure A is a fixing structure for fixing the sheet metal component 3 as a component to the cover 1 as a resin member.
As shown in FIG. 1, the component fixing structure A according to the first embodiment includes a cover 1, a plate nut 2, a sheet metal component 3, a flange collar 4, a washer 5, an E ring 6, and a screw. 7 is mainly composed.
In the present embodiment, the cover 1 and the sheet metal part 3 are fixed at two locations. However, the present invention is not limited to this and may be fixed at, for example, three locations.

The cover 1 is a member that decorates the appearance of a housing (not shown), and is formed of a synthetic resin material. As shown in FIG. 1, two attachment portions 11, 11 for attaching the plate nut 2 are integrally formed on the back surface 1 a of the cover 1 (the surface not exposed to the outside of the housing). The attachment portions 11, 11 are formed at a predetermined interval in the longitudinal direction of the sheet metal part 3.
As shown in FIG. 2, the mounting portion 11 includes a bottom wall 11a extending along the back surface 1a of the cover 1, a top wall 11b spaced from the bottom wall 11a and opposed to the bottom wall 11a. It is mainly comprised from the side walls 11c-11e which connect the wall 11b.

  A groove portion 11f having a rectangular shape in plan view is formed through the center portion of the bottom wall 11a so as to divide the bottom wall 11a. Further, the mounting portion 11 is formed with a mounting hole 11g into which the plate nut 2 is inserted. The mounting hole 11g has a rectangular shape in plan view, is formed so as to communicate with the groove 11f, and has a width wider than the groove width of the groove 11f. Furthermore, an extraction hole 11h used when the plate nut 2 is extracted from the attachment hole 11g is formed through the upper wall 11b. The extraction hole 11h has a U shape in plan view, and is formed from one end portion (end portion on the side wall 11e side) of the upper wall 11b to the vicinity of the other end portion (end portion on the opening end face 11i side where the attachment hole 11g opens). ing. The extraction hole 11h is formed so as to communicate with the mounting hole 11g, and has a width larger than the diameter of the shaft portion 41 of the flange collar 4. In addition, what is necessary is just to set the shape of the extraction hole 11h suitably.

  As shown in FIGS. 1 and 2, the plate nut 2 is a plate-like (flat plate) member having a rectangular shape in plan view, and is formed in a shape that can be fitted into the attachment hole 11 g of the attachment portion 11. . The plate nut 2 is formed with a screw hole 2a having a circular shape in plan view. A female screw into which the male screw of the screw 7 is screwed is formed on the inner peripheral surface of the screw hole 2a. As shown in FIG. 3, both end portions of the plate nut 2 are held between the bottom wall 11a and the upper wall 11b. One end surface of the plate nut 2 is in contact with the inner surface of the side wall 11e, and the other end surface is flush with the open end surface 11i (see FIGS. 1 and 2). Furthermore, as shown in FIG. 1, the surface of the plate nut 2 is exposed to the outside through the extraction hole 11h. The plate nut 2 may be attached to the mounting hole 11g with play.

  As shown in FIGS. 1 and 2, the sheet metal part 3 is a plate-like member having a rectangular shape in plan view, and is formed of a metal material. As shown in FIG. 1, two attachment holes 31 and 32 are formed through the sheet metal part 3 at positions facing the attachment portions 11 and 11. In other words, the attachment holes 31 and 32 are formed at positions facing the screw holes 2 a of the plate nut 2. The attachment hole 31 has a circular shape in plan view. The mounting hole 32 has a rectangular shape in plan view, and is elongated in the longitudinal direction of the sheet metal part 3 (the same direction as the direction in which the mounting hole 31 is located). As shown in FIG. 3, the sheet metal part 3 has the opening edges of the attachment holes 31 and 32 sandwiched between the flange portion 42 of the flange collar 4 and the washer 5 (only the attachment hole 31 is shown). It is fixed in a state separated from

  As shown in FIG. 2, the flange collar 4 includes a substantially cylindrical shaft portion 41 and a disc-shaped flange portion 42 formed continuously from one end of the shaft portion 41 and having a larger diameter than the shaft portion 41. And mainly consists of. The flange collar 4 is formed with a screw insertion hole 4a through which the screw 7 is inserted. As shown in FIG. 4, the flange collar 4 is movable along the longitudinal direction of the mounting hole 32 (the arrow direction in FIG. 4) before the screw 7 is screwed.

  As shown in FIG. 1, the shaft portion 41 can be inserted into the extraction hole 11 h of the attachment portion 11 and the attachment holes 31 and 32 of the sheet metal part 3. As shown in FIG. 3, the shaft portion 41 has a diameter substantially the same as the diameter of the mounting hole 31. Further, as shown in FIG. 4, the diameter of the shaft portion 41 is formed to be substantially the same as the width dimension in the short direction of the mounting hole 32 and smaller than the width dimension in the longitudinal direction of the mounting hole 32. Yes.

  As shown in FIG. 2, an annular groove 41 a is formed on the outer peripheral surface of the shaft portion 41 over the entire circumference. Further, as shown in FIGS. 2 and 3, the sheet metal part 3, the washer 5, and the E-ring 6 are mounted on the outer peripheral surface of the shaft portion 41 in order from the flange portion 42 side. The E-ring 6 is a member for integrally fixing the sheet metal part 3, the flange collar 4 and the washer 5, and is mounted on the outer peripheral surface of the shaft portion 41 via a concave groove 41a. As shown in FIG. 3, the shaft portion 41 is in contact with the front surface of the plate nut 2.

  As shown in FIGS. 3 and 4, the diameter of the flange portion 42 is formed larger than the diameter of the mounting hole 31 and larger than the width dimension in the short direction of the mounting hole 32. As shown in FIG. 3, the flange portion 42 located on the mounting hole 31 side is in contact with the opening edge of the mounting hole 31, and the flange portion 42 located on the mounting hole 32 side is shown in FIG. Thus, the lower surface is in contact with the opening edge of the mounting hole 32 in the short direction.

  The screw 7 is a member for fixing the sheet metal part 3 to the cover 1 and can be appropriately selected from known screws. As shown in FIG. 2, the screw 7 mainly includes an elongated columnar shaft portion 71 and a head portion 72 formed continuously at one end of the shaft portion 71. A male screw is formed on the outer peripheral surface of the shaft portion 71. As shown in FIG. 3, the shaft portion 71 is inserted into the screw insertion hole 4a and screwed into the screw hole 2a. The tip of the shaft portion 71 is located in the groove portion 11f. A flange 72a is formed at the end of the head 72 on the shaft 71 side. The flange 72a is formed to have a diameter larger than that of the screw insertion hole 4a of the flange collar 4, and is in contact with the opening edge of the screw insertion hole 4a.

  Next, an example of the fixing operation of the sheet metal part 3 will be described with reference to FIGS. 1 and 2.

  First, the shaft portion 41 of the flange collar 4 is inserted into the mounting holes 31 and 32 of the sheet metal part 3. Then, the washer 5 is mounted from the tip of the shaft portion 41 and the E ring 6 is mounted, and the sheet metal part 3, the flange collar 4 and the washer 5 are integrally fixed by the E ring 6.

Next, the plate nut 2 is inserted into (inserted into) the mounting hole 11 g of the mounting portion 11. Then, the flange collar 4 is placed on the plate nut 2 through the extraction hole 11 h of the attachment portion 11. At this time, the flange collar 4 is placed so that the screw hole 2a of the plate nut 2 and the screw insertion hole 4a of the flange collar 4 communicate with each other. Then, the screw 7 is inserted into the screw insertion hole 4 a of the flange collar 4, the screw 7 is screwed into the screw hole 2 a of the plate nut 2, and the screw 7 is tightened.
The sheet metal part 3 is fixed to the cover 1 through the above steps.

  Next, an example of the disassembly work of the component fixing structure A according to the present embodiment will be described with reference to FIGS. 1 and 2.

  First, the screw 7 is removed from the screw hole 2 a of the plate nut 2 and the screw insertion hole 4 a of the flange collar 4. Then, the flange collar 4, the sheet metal part 3, the washer 5 and the E-ring 6 attached thereto are removed from the plate nut 2 together. Further, the E ring 6 is removed from the flange collar 4, and the sheet metal part 3 and the washer 5 are removed from the flange collar 4.

  Next, a finger is put into the extraction hole 11h of the attachment portion 11, and the plate nut 2 is pushed out and taken out from the attachment hole 11g.

According to the component fixing structure A according to the first embodiment described above, the plate nut 2 into which the screw 7 is screwed is formed in a plate shape and has a simple structure in which the screw hole 2a is formed. Therefore, the manufacturing cost (processing cost) can be reduced as compared with a structure in which a holding claw is provided on a conventional insert fitting.
Further, an extraction hole 11h is formed in the upper wall 11b, and the plate nut 2 is exposed to the outside through the extraction hole 11h, so that when the plate nut 2 is removed at the time of disposal or recycling, the extraction is performed. Since it can be removed by putting a finger into the hole 11h and pushing out the plate nut 2 from the mounting hole 11g, workability is good.
In addition, the attachment portion 11 is formed integrally with the back surface 1a of the cover 1, and the attachment hole 11g for inserting the plate nut 2 is formed in the attachment portion 11, so that the surface of the cover 1 has a sheet metal. Since the member for fixing the component 3 is not exposed, the design of the appearance of the cover 1 is not impaired.
Furthermore, since the surface area (contact area) of the attachment part 11 and the plate nut 2 is large, and the plate nut 2 is fitted in the attachment hole 11g of the attachment part 11, the hexagon nut is press-fitted after molding of the housing. Torque resistance performance is higher than the structure.

  By the way, the synthetic resin member and the metal member have a property of expanding due to heat (temperature change). Therefore, the positions of the synthetic resin mounting portions 11 and 11 change due to thermal expansion, and the pitch between the screw holes 2a and 2a of the plate nuts 2 and 2 inserted into the mounting portions 11 and 11 changes. Further, the pitch between the mounting holes 31 and 32 of the metal sheet metal part 3 changes. Further, since the linear thermal expansion coefficient is different between the synthetic resin member and the metal member, a deviation occurs between the pitch between the screw holes 2a and 2a of the plate nuts 2 and 2 and the pitch between the mounting holes 31 and 32. In the present embodiment, since the attachment hole 32 of the sheet metal part 3 is formed to be elongated, the flange collar 4 can move freely along the longitudinal direction of the sheet metal part 3, which is favorable for the deviation of the pitch. Can adapt to. That is, when the pitch shift occurs, first, the sheet metal part 3 is fixed to the cover 1 on the attachment hole 31 side. Next, the flange collar 4 positioned on the mounting hole 32 side is moved along the longitudinal direction of the mounting hole 32, and the position is adjusted so that the flange collar 4 communicates with the screw hole 2 a of the plate nut 2. The sheet metal part 3 is fixed to the cover 1 on the 32 side.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. In the description, points different from the first embodiment will be described in detail, and the same elements as those in the first embodiment will be denoted by the same reference numerals as those in the first embodiment, and redundant description will be omitted. To do. The second embodiment is different from the first embodiment described above in that one of the fixing portions of the cover 1 and the sheet metal part 3 is constituted by the boss 8 and the holding claw 9.

  As shown in FIG. 4, the boss 8 and the holding claw 9 are integrally formed on the back surface 1 a of the cover 1.

  The boss 8 is mainly composed of a truncated cone-shaped main body 81 projecting from the back surface 1 a of the cover 1 and a protrusion 82 formed continuously at the tip of the main body 81. The protrusion 82 is formed in a shape that can be fitted into the attachment hole 32 of the sheet metal part 3. In the boss 8, the front end surface of the main body 81 is in contact with the back surface of the sheet metal part 3, and the protrusion 82 is fitted in the mounting hole 32 of the sheet metal part 3.

The holding claw 9 is mainly composed of a base portion 91 that protrudes from the back surface 1 a of the cover 1 and a claw portion 92 that extends from the tip of the base portion 91 toward the boss 8. The side surface of the base 91 is in contact with the side surface of the sheet metal part 3. Further, the claw portion 92 is hooked on the surface of the sheet metal part 3.
As described above, the sheet metal part 3 is sandwiched between the main body 81 of the boss 8 and the claw 92 of the holding claw 9 and is fixed to the cover 1.

According to the component fixing structure A according to the second embodiment described above, by fixing the sheet metal component 3 to the cover 1 with the boss 8 and the holding claw 9, the mounting portion 11, the plate nut 2, the flange collar 4, Since the use of the washer 5, the E ring 6 and the screw 7 can be suppressed to one place, the number of parts can be reduced as compared with the first embodiment.
In addition, when the two attachment portions 11 and 11 are integrally formed on the back surface 1a of the cover 1, the interval between the attachment portions 11 and 11 is relatively wide. However, as in the second embodiment, the attachment portion 11, the boss 8 and the holding claw 9 are integrally formed on the back surface 1 a of the cover 1, the distance between the mounting portion 11, the boss 8 and the holding claw 9 can be made relatively narrow. Therefore, it is possible to adapt well when fixing relatively small parts.

  Although the embodiments of the present invention have been described above, it goes without saying that the embodiments can be appropriately modified and implemented without departing from the spirit of the present invention. In the present embodiment, the mounting hole 32 of the sheet metal part 3 is formed in a rectangular shape. However, the present invention is not limited to this. For example, as illustrated in FIG. May be.

  Further, in this embodiment, the washer 5 is mounted on the flange collar 4. However, the width dimension of the E-ring 6 is formed larger than the width dimension of the mounting holes 31 and 32 of the sheet metal part 3, and the sheet metal part 3 is formed in the flange collar 4. If it does not fall off, the washer 5 may not be provided.

1 Cover (resin member)
DESCRIPTION OF SYMBOLS 1a Back surface 11 Mounting part 11g Mounting hole 11h Extraction hole 2 Plate nut 2a Screw hole 3 Sheet metal part (component)
31, 32 Mounting hole 4 Flange collar 4a Screw insertion hole 41 Shaft part 5 Washer 6 E-ring 7 Screw A Fixing structure of parts

Claims (4)

A component fixing structure for fixing a component to a resin member with a screw,
A mounting portion integrally formed on the back surface of the resin member and provided with a mounting hole;
A component fixing structure comprising: a plate-like plate nut that is detachably inserted into the mounting hole and has a screw hole for screwing the screw. The mounting portion is formed with an extraction hole communicating with the mounting hole,
2. The component fixing structure according to claim 1, wherein the surface of the plate nut is exposed to the outside through the extraction hole in a state of being inserted into the mounting hole. At least two of the attachment portions are formed at a predetermined interval,
The component is a metal component through which a mounting hole passes,
The mounting holes are respectively opened at positions facing the plurality of mounting portions,
3. The component fixing structure according to claim 1, wherein one of the two attachment holes is elongated in the same direction as a direction in which the other is located. 4. A flange collar having a screw insertion hole through which the screw is inserted;
4. The component fixing structure according to claim 3, wherein the flange collar has a shaft portion that is inserted through the attachment hole and the extraction hole and is placed on the plate nut. 5.

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