JPH073321U - Fastener - Google Patents

Abstract

(57) [Summary] [Purpose] While maintaining the rigidity to prevent buckling,
(EN) Provided is a fastener which can reduce both the insertion force and the withdrawal force in order to improve the mounting workability. [Structure] Due to the presence of the support column 8, rigidity for preventing buckling of the leg section 3 is secured, and on the other hand, the support section 8a, 8c of the portion connected to the engaging section 10 has leg sections. Since the thin-walled portion 12 is formed along the insertion direction of 3, the column portion 8 bends inward together with the engaging portion 10 at the time of insertion and withdrawal, so that both the insertion force and the withdrawal force are reduced and workability is improved. Is improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fastener used when attaching a mounting component such as a kicking plate to a counterpart component such as a vehicle body panel.

[0002]

[Prior art]

 Examples of fasteners used when attaching a kicking plate, trim board, front grille, etc. to a vehicle body panel in an automobile or attaching a cowl to a body in a motorcycle are disclosed in Japanese Utility Model Publication No. 54-41761. There are known ones. In other words, it is an integrally molded product made of synthetic resin that has a head part that engages with the mounting part side and a leg part that inserts into the mounting hole of the companion part. Is formed to prevent buckling at the time of insertion, and an engaging portion to be engaged with the edge portion of the mounting hole is formed in a connected state on the strut portion.

[0003]

[Problems to be solved by the device]

 However, in such a conventional technique, since the leg portion of the fastener is formed with the column portion for increasing the rigidity of the leg portion, the leg portion is inserted into the mounting hole of the counterpart component. Although it is possible to prevent buckling at the time of installation, both the insertion force when inserting the leg into the mounting hole of the mating component and the removal force when removing it from the mounting hole are large, making mounting work extremely difficult. Becomes In other words, since the insertion force is large, a large amount of force is required for mounting, and the removal force is large, so a large amount of force is required even if the component is once removed and then re-attached for convenience. It's inconvenient. In particular, with regard to the removal force, it can be removed with a small force after it has been removed once, but it requires a very large initial removal force when trying to remove it for the first time, and remounting work is very troublesome. is there.

The present invention has been made by paying attention to such a conventional technique, and both the insertion force and the withdrawal force are improved in order to improve the mounting workability while maintaining the rigidity to prevent the buckling. It provides a fastener that can be made smaller.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, a fastener according to the present invention comprises a head portion with a flange that can be engaged in a mounting hole or a notch portion of a mounting component, and a leg portion that can be inserted into the mounting hole of a counterpart component. In the fastener having the column portion and the engaging portion connected to the column portion, the leg portion is connected to the engaging portion. A thin-walled portion is formed along the insertion direction of the legs on the column portion.

[0006]

[Action]

 The presence of the pillars ensures rigidity to prevent buckling of the legs, while the pillars that are connected to the engaging parts have thin-walled parts along the insertion direction of the legs. Therefore, the column portion is bent inward together with the engaging portion at the time of insertion and removal, so that both the insertion force and the withdrawal force are reduced and the workability is improved.

[0007]

【Example】

 A preferred embodiment of the present invention will be described below with reference to the drawings.

1 to 5 are views showing a first embodiment of the present invention. The fastener 1 according to this embodiment is an integrally molded product made of synthetic resin, which is composed of a head 2 and a leg 3, and a skirt-shaped portion 4 is formed between the head 2 and the leg 3. Has been done. The head 2 itself has a cylindrical shape, and a U-shaped planar flange 5 is formed on the top thereof. A hole 6 for reducing weight is formed in this flange 5 (see FIG. 3). A pair of protrusions 7 are formed on the upper surface of the skirt-shaped portion 4.

A pillar portion 8 having a cross-shaped cross section is formed in the center of the leg portion 3. The wall thickness of each of the pillars 8 is gradually reduced in the radial direction. Further, among the four radial pieces 8a, 8b, 8c, 8d of the column portion 8, the engaging portions 10 are connected to the opposed radial pieces 8a, 8c at positions near the tips 9. The portion of the engaging portion 10 connected to the skirt-shaped portion 4 is a constricted portion 10a.

The engaging portion 10 is also connected to the skirt-shaped portion 4 on the head 2 side, and a notch 11 is formed in a portion other than the connecting portion with respect to the column portion 8. Therefore, when the section of the notch 11 is cross-sectioned, as shown in FIG. 2, the engaging portions 10 divided into four are located between the radial pieces 8a, 8b, 8c, 8d of the supporting column 8. Becomes

Then, of the four radial pieces 8a, 8b, 8c, 8d of the support column 8, the leg portion 3 is inserted into the root portion of the radial pieces 8a, 8c to which the engaging portion 10 is connected. A thin portion 12 is formed along the direction A 1.

Next, a procedure for attaching the kicking plate 13 which is the “attachment component” to the vehicle body panel 14 which is the “counterpart component” using the fastener 1 will be described. First, the head 2 of the fastener 1 is inserted into the notch 16 of the attachment piece 15 formed on the lower surface of the kicking plate 13, and the attachment piece 15 is sandwiched between the flange 5 and the skirt-shaped portion 4. First, one of the protrusions 7 formed on the upper surface of the skirt-shaped portion 4 is engaged with the recess 17 formed on the lower surface of the mounting piece.

As a result, the fastener 1 is attached to the kicking plate 13, so that the leg portion 3 of the fastener 1 is inserted into the attachment hole 18 of the vehicle body panel 14. At this time, the engaging portion 10 is pushed inward by the edge portion of the mounting hole 18 and bends inward, but the radial pieces 8a and 8c of the column portion 8 connected to the engaging portion 10 are also centered on the thin portion 12. Since it bends so as to incline inward, the leg portion 3 can be inserted into the mounting hole 18 with a small insertion force. Further, by providing the thin portion 12 in this way, the bending margin of the engaging portion 10 increases, so that the allowable amount for the positional deviation of the mounting hole 18 increases and the mounting workability further improves. Since the thin portion 12 is formed along the insertion direction A and does not bend in the direction in which the column 8 is buckled, even if such a thin portion 12 is formed, the buckling of the legs 3 The rigidity for preventing the above is maintained. The leg portion 3 inserted into the mounting hole 18 fits into the mounting hole 18 at the constricted portion 10a and is prevented from coming off.

Next, for convenience of work, when the leg portion 3 of the fastener 1 is once removed from the attachment hole 18, the entire fastener 1 is pulled as it is in the removal direction B and then removed. Also at this time, as in the case of insertion, the engaging portion 10 bends inward, and the radial pieces 8a and 8c connected to the engaging portion 10 also bend so as to incline inward around the thin portion 12. The leg 3 can be pulled out with a small pulling force. As described above, in the case of this embodiment, it is possible to reduce both the insertion force and the withdrawal force while maintaining the rigidity for preventing buckling, which is very advantageous in terms of workability. .

6 to 10 are views showing a second embodiment of the present invention. The basic structure of the fastener 19 of this embodiment is the same as that of the first embodiment. The difference is that the flange 20 of the head portion 23 is circular, and the radial pieces 21a, 21b, 21c, 21d of the column portion 21 of the leg portion 24 that are not connected to the engaging portion 22 are radial pieces 21b, 21d. Has a uniform thickness in the radial direction, the thickness of the radial pieces 21b, 21d gradually decreases in the insertion direction A, and the connecting position of the engaging portion 22 with the radial pieces 21a, 21c is first. The point is slightly closer to the head 2 than the embodiment, and the projection 7 is not provided on the upper surface of the skirt-shaped portion 4. In particular, the second embodiment is characterized in that the thickness of the support column 21 gradually decreases in the insertion direction A, and is tapered slightly toward the tip 9 side. As a result, the mold release resistance of the mold can be reduced, so that it is possible to reliably perform mold release with one protrusion during injection molding, which is extremely advantageous in terms of manufacturability. Other configurations and operational effects are the same as those in the previous embodiment, and the duplicated description is omitted.

In the above description, the mounting piece 15 of the kicking plate 13 is provided with the notch portion 16 and the head portions 2 and 23 of the fasteners 1 and 19 are engaged therewith. It is also possible to form a "mounting hole" in which the head portions 2 and 23 are engaged.

[0017]

[Effect of device]

 The fastener according to the present invention has the contents as described above, and the rigidity for preventing the buckling of the legs is ensured by the presence of the pillar portion, and at the same time, it is connected to the engaging portion. Since the thin-walled part along the insertion direction of the leg is formed in the supporting part of the connected part, the supporting part will bend inward together with the engaging part during insertion and withdrawal. Both the pulling force and the removing force are reduced, and the workability is improved.

[Brief description of drawings]

FIG. 1 is a side view showing a fastener according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line SA-SA shown in FIG.

FIG. 3 is a plan view of the fastener shown in FIG.

FIG. 4 is a bottom view of the fastener shown in FIG.

5 is a cross-sectional view taken along the line SB-SB shown in FIG.

FIG. 6 is a side view showing a fastener according to a second embodiment of the present invention.

7 is a cross-sectional view taken along the line SC-SC shown in FIG.

FIG. 8 is a plan view of the fastener shown in FIG.

9 is a bottom view of the fastener shown in FIG.

10 is a cross-sectional view taken along the line SD-SD indicated by the arrow in FIG.

[Explanation of symbols]

 1, 19 Fasteners 2, 23 Head 3, 24 Legs 5, 20 Flange 8, 21 Struts 10, 22 Engaging part 12 Thin part 13 Kicking plate (mounting part) 14 Body panel (counterpart part) 16 Notch part 18 mounting holes

Claims (3)

[Scope of utility model registration request] 1. A head part with a flange that can be engaged in a mounting hole or a cutout part of a mounting part, and a leg part that can be inserted into a mounting hole of a counterpart part, and the leg part is a leg part. A fastener comprising a strut portion located substantially at the center and an engaging portion connected to the strut portion, wherein the strut portion of the portion connected to the engaging portion is along the insertion direction of the leg portion. A fastener characterized in that a thin portion is formed. 2. The fastener according to claim 1, wherein the wall thickness of the column is gradually reduced in the insertion direction. 3. The fastener according to claim 1, wherein a skirt-shaped portion is formed between the head portion and the leg portion.