Clip

• US 5,641,255 A
• Filed: 06/01/1995
• Issued: 06/24/1997
• Est. Priority Date: 06/15/1994
• Status: Expired due to Term

• Current Assignee: Nifco Incorporated
• Original Assignee: Nifco Incorporated
• Inventors: Tanaka, Tsutomu
• Primary Examiner(s): Saether, Flemming
• Application Number:
  US08/456,673
• Time in Patent Office: 754 Days
• Field of Search: 411/45, 411/46, 411/47, 411/48, 411/51, 411/57, 411/60, 411/508, 411/908
• US Class Current: 411/48
• CPC Class Codes: F16B 19/1081 fastened by a drive-pin F16B19/109 takes precedence
• CPC Class Codes: F16B 5/0642 the plates being arranged one on top of the other and in full close contact with each other

Abstract

A clip which is comprised of a male member and a female member. The male member is inserted into the female member, and an inserting portion of a leg of the male member passes through split pieces of the female member. The clip in which the male member and the female member are assembled is inserted into through holes in panels to be fastened. When the male member is slightly pulled back, tip ends of the split pieces are engaged in engaging holes in the inserting portion, allowing the clip to be pressed in with the split pieces set in a state of reduced diameter. When the fastened state of the panels is canceled, the male member is pulled out, and the tip ends of the split pieces are engaged in the engaging holes in the inserting portion while being guided by guide grooves. As a result, the diameter of the tip ends of the split pieces is reduced, and the clip is pulled out with the female member held integrally with the male member. Therefore, even though the split pieces have undergone creep deformation and their diameter cannot be resiliently reduced, the clip can be removed with a small pulling-out force.

Claims

1. A clip fastener, comprising:

a female member comprising a cylindrical member having first and second opposite ends, and a hollow interior portion, the first end forming a tapered tip and the second end having a flange extending therefrom, the tapered tip having a notched portion and the flange having a circular hole which is in communication with said hollow interior portion, said cylindrical member having a plurality of slits extending through the tip portion and axially along the cylindrical member to divide the cylindrical member into a plurality of split pieces that are deformable along expanding and contracting directions, the notched portion being divided into a plurality of notches respectively located along an interior of the plurality of split pieces; and

a male member comprising a head for fitting into the circular hole of the flange of the female member, and a leg extending from said head and into the hollow interior portion of the female member, said leg having (i) protrusions annularly spaced apart from each other along an axially intermediate portion of the leg, said protrusions being adapted to fit in said notches of the female member, (ii) a frustoconical inserting portion forming an end of the leg, (iii) an abutment portion extending from the inserting portion, said abutment portion comprising an annular member for expanding the plurality of split pieces of said female member along the expanding direction, wherein the abutment portion defines engaging holes for respectively engaging an exterior of the split pieces along the tapered tip of the female member.

2. The clip of claim 1, wherein said male member further includes guide grooves extending along the leg for guiding the ends of the split pieces along the tapered tip thereof into the engaging holes.

3. The clip of claim 2, further comprising a plurality of plate-like members projecting radially from an outer surface of said leg, the guide grooves being defined between adjacent plate-like members.

4. The clip of claim 1, wherein the circular flange includes a counterbored portion for receiving the head of the male member.

5. The clip of claim 4, wherein the male member further comprises a plurality of guide pieces projecting from a bottom surface of the head and said female member includes a plurality of cams provided in said counterbored portion of said female member to guide the guide pieces upon rotation of the leg.

6. The clip of claim 1, wherein said flange of said female member has an enlarged-thickness circular portion that is formed along a central region of said flange, and an annular groove is provided along a bottom surface of the flange, between said enlarged-thickness circular portion and an outer peripheral edge of the flange.

7. The clip of claim 6, further comprising projections extending from the annular groove at predetermined intervals.

8. The clip of claim 1, wherein the male member further comprises projections provided on an outer peripheral surface of said leg.

9. The clip of claim 1, wherein the hollow interior portion of said female member has a conical shape that tapers toward the tapered tip of the female member.

10. The clip of claim 1, wherein the inserting portion of the male member comprises a plurality of radially extending triangular plates having exposed outer edges that form a generally frustoconical shape, said annular member interconnects radially outermost corners of the triangular plates, and the engaging holes are bounded by an interior surface of said annular member and adjacent triangular plates.

11. The clip of claim 1, wherein said male member has a cruciform screw hole extending into a top surface of the flange.

12. A clip fastener, comprising:

a female member comprising a cylindrical member extending along an axial direction and having a first and second opposite ends and a hollow interior portion, the first end forming a tapered tip and the second end having a flange extending therefrom, the tapered tip having an interior notched portion and an exterior notched portion, the flange having a circular hole which is in communication with said hollow interior portion, said cylindrical member having a plurality of slits extending through the tip portion and axially along the cylindrical member to divide the cylindrical member into a plurality of split pieces that are deformable along expanding and contracting directions, the interior notched portion being divided into a plurality of interior notches respectively located along an interior of the plurality of split pieces, and the exterior notched portion being divided into a plurality of exterior notches each having an outer surface portion that extends substantially parallel to the axial direction; and

a male member comprising a head for fitting into the circular hole of the flange of the female member, and a leg extending from said head and into the hollow interior portion of the female member, said leg having (i) protrusions annularly spaced apart from each other along an axially intermediate portion of the leg, said protrusions being adapted to fit in said interior notches of the female member, (ii) a frustoconical inserting portion forming an end of the leg, (iii) an abutment portion extending from the inserting portion, said abutment portion comprising an annular member for expanding the plurality of split pieces of said female member along the expanding direction, wherein the abutment portion defines engaging holes extending into said inserting portion for respectively engaging the split pieces along the exterior notches thereof.

13. The clip of claim 12, wherein said split pieces have a rounded outer contour.

14. The clip of claim 13, wherein said male member further includes guide grooves extending along the leg for guiding the ends of the split pieces along the tapered tip thereof into the engaging holes.

15. The clip of claim 12, wherein the circular flange includes a counterbored portion for receiving the head of the male member.

16. The clip of claim 12, wherein said flange of said female member has an enlarged-thickness circular portion that is formed along a central region of said flange, and an annular groove is provided along a bottom surface of the flange, between said enlarged-thickness circular portion and an outer peripheral edge of the flange.

17. The clip of claim 16, further comprising projections extending from the annular groove at predetermined intervals.

18. The clip of claim 12, wherein the male member further comprises projections provided on an outer peripheral surface of said leg.

19. A clip fastener, comprising:

a female member comprising a cylindrical member having first and second opposite ends and a hollow interior portion, the first end forming a tapered tip and the second end having a flange extending therefrom, the flange having a circular hole which is in communication with said hollow interior portion, said cylindrical member having a plurality of slits extending through the tip portion and axially along the cylindrical member to divide the cylindrical member into a plurality of split pieces that are deformable along expanding and contracting directions; and

a male member comprising a head for fitting into the circular hole of the flange of the female member, and a leg extending from said head and into the female member, said leg including a frustoconical tip including a large-diameter annular portion and a tapering portion extending axially from the annular portion, the annular portion being adapted to spread the split pieces of the female member along the expanding direction upon insertion of the male member into the female member, wherein said frustoconical tip includes a plurality of engaging holes extending axially through the frustoconical tip respectively corresponding to the plurality of split pieces, whereby the split pieces of the female member are respectively secured in the engaging holes upon retracting the male member from the female member after the male member is inserted fully into the female member, such that the split pieces are forcibly biased along the contracting direction thereby reducing an outer diameter of the female member.