JP3120730U - Pop nut mounting bracket and pop nut mounting bracket - Google Patents

Abstract

A metal fitting with a pop nut and a metal fitting for mounting a pop nut that can be manufactured efficiently and easily, do not generate chips, and are inexpensive.
A pop nut having a cylindrical part 9 formed with an internal thread, a bucklingable rectangular cylindrical part 6 continuous with one end of the cylindrical part 9, and an outer collar 7 formed at the tip of the rectangular cylindrical part 6. 1 and a member with a pop nut provided with a member 2 to which the pop nut 1 is attached. The member 2 is a mold having a columnar press portion that forms a concave step portion 4 on the surface side periphery of the lower hole, and a prismatic portion that protrudes from the tip surface of the columnar press portion and is inserted into the lower hole. By using and pressing, the concave step portion 4 is formed at the peripheral portion of the lower hole, and the lower hole is processed into a square hole similar to the cross-sectional shape of the prismatic portion.
[Selection] Figure 1

Description

  The present invention relates to a pop nut mounting bracket to which a pop nut is mounted and a pop nut mounting bracket for mounting the pop nut.

The conventional pop nut in this type of pop nut mounting structure includes a cylindrical portion formed with an internal thread, a thin cylindrical portion that is continuously buckled at one end of the cylindrical portion, and an outer end of the thin cylindrical portion. It has a collar. A member that is a pop nut mounting bracket to which a pop nut can be attached has a hole for inserting the cylindrical portion and the thin-walled cylindrical portion, and the cylindrical portion and the thin-walled cylindrical portion are inserted into the hole to lock the outer collar to the surface of the member. In this state, a buckling tool is screwed into the female screw from the outer collar side, the thin cylindrical portion is buckled by pulling the cylindrical portion against the outer collar, and the buckled portion is locked to the back surface of the member. (For example, refer to Patent Document 1).
Japanese Utility Model Publication No. 7-16018

  For example, as shown in FIG. 6, when the outer collar 51 of the pop nut 50 is locked to the surface of the member 52, the outer collar 51 protrudes from the surface of the member 52 by the thickness of the outer collar 51. Another member attached to the female screw by the male screw is attached in a state of floating from the surface of the member 52, and there is a problem that the attachment of the separate member becomes unstable. 53 is a buckling portion, 54 is a cylindrical portion having a female screw, and 55 is a hole in the member.

  On the other hand, when a concave step (not shown) is formed on the surface side of the hole 55 of the member 52, the outer collar 51 sinks into the concave step, so that another member can be attached closely to the member 52. it can.

  However, it is necessary to process the recessed step portion, and the cutting process takes time and labor, is inefficient and generates chips. Further, when the thickness of the member is thin, it is not easy to form the concave step portion.

  Accordingly, an object of the present invention is to provide a pop nut fitting and a pop nut mounting fitting that can be manufactured efficiently and easily, do not generate chips, and can be made inexpensive.

The pop nut fitting of the present invention is a pop nut having a cylindrical portion formed with an internal thread, a bucklingable rectangular cylindrical portion continuous to one end of the cylindrical portion, and an outer collar formed at the tip of the rectangular cylindrical portion. And a pop nut fitting provided with a member to which the pop nut is attached,
The member includes a mold having a cylindrical press portion that forms a concave step portion on the surface side periphery of the lower hole, and a prismatic portion that protrudes from the front end surface of the cylindrical press portion and is inserted into the lower hole. By using and pressing, the concave step portion is formed in the peripheral portion of the lower hole, and the lower hole is processed into a square hole similar to the cross-sectional shape of the prismatic portion,
In the pop nut, the square tube portion is inserted into the square hole and is non-rotatably fitted into the square hole, the outer collar is fitted into the concave step portion, and the buckled portion of the square tube portion Is locked to the back surface of the attached member.

The pop nut mounting bracket of the present invention is a pop having a cylindrical portion formed with an internal thread, a buckling-able rectangular cylindrical portion continuous to one end of the cylindrical portion, and an outer collar formed at the tip of the rectangular cylindrical portion. A pop nut mounting bracket for attaching a nut,
Press using a mold having a cylindrical press portion that forms a concave step portion on the surface side periphery of the lower hole, and a prismatic portion that protrudes from the tip surface of the cylindrical press portion and is inserted into the lower hole. Thus, the concave step portion is formed in the peripheral edge portion of the lower hole, and the lower hole is processed into a square hole similar to the cross-sectional shape of the prismatic portion.

  According to the pop nut fitting and the pop nut mounting bracket of the present invention, the cylindrical press portion that forms a concave step portion on the surface side periphery of the lower hole and the front end surface of the cylindrical press portion are projected to fit into the lower hole. By pressing using a mold having a prism portion, a square hole having a concave step portion can be formed. For this reason, it is possible to increase the tightening torque without causing the pop nut to idle by fitting the square tube portion into the square hole. Moreover, since it press-processes as mentioned above, it can manufacture efficiently in a short time without generating chips, and also it can manufacture easily even if the thickness of a metal fitting is small, and it can be made cheap.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1A is a plan view of a member 2 to which a pop nut 1 is attached, and FIG. 1B shows a cross-sectional view thereof. The mounting hole 5 of the pop nut 1 of the member 2 includes, for example, a hexagonal square hole 3 and a circular concave step portion 4 having a diameter larger than that of the square hole 3. In the figure, the square hole 3 is inscribed in a plan view on the circular concave step portion 4, but the concave step portion 4 may be slightly larger than that. The depth of the recessed step portion 4 is determined to be approximately the same as or less than the thickness of the outer collar described later of the pop nut 1, but is determined to be approximately half the thickness of the member 2.

  FIG. 1 (c) shows the attached state of the pop nut 1. The pop nut 1 has a cylindrical portion 9 formed with an internal thread, a buckled thin rectangular tube portion 6 continuous with one end of the cylindrical portion 9, and an outer collar 7 provided at the tip of the rectangular tube portion 6. The rectangular tube portion 6 is a tube having a hexagonal cross section, for example, which is fitted so that the peripheral surface thereof is not rotated in the rectangular hole 3. The pop nut 1 is formed in a state in which the buckling portion 8 is formed in the rectangular tube portion 6 by the mounting method described in the conventional example, and the edge portion of the square hole 3 is sandwiched between the outer collar 7 and the buckling portion 8. It is attached to the member 2. At this time, since the outer collar 7 is fitted into the recessed step portion 4, the surface of the outer collar 7 can be flush with the surface of the member 2. Further, since the rectangular tube portion 6 is fitted into the rectangular hole 3, the pop nut 1 cannot rotate.

  2 and 3 show a method for manufacturing the mounting hole 5 of the member 2. FIG. 2 shows a first pressing step in which the lower hole 10 is punched into the member 2 with the first mold 12 having the first cylindrical press portion 11 for forming the lower hole 10. Here, the member 2 uses a square pipe. The member 2 is placed on the fixed portion 13, a receiving die (not shown) is disposed inside the member 2, and punched by the first cylindrical press portion 11.

  FIG. 3 shows a second pressing step in which the concave mold part 4 and the lower hole 10 are formed in the square hole 3 by the second mold 14. The second mold 14 projects a second columnar press portion 15 that forms the concave step portion 4 corresponding to the lower hole 10 and a hexagonal prism portion 16 that fits into the lower hole at the tip surface thereof. Has been established. The member 2 is placed on the fixed base 13, a receiving die (not shown) is arranged inside the member 2, the prismatic part 16 is inserted into the lower hole 10, and the peripheral part of the lower hole 10 by the second cylindrical press part 15. Press. As a result, the peripheral edge portion of the lower hole 10 is caulked by the second cylindrical press portion 15, and the caulked portion extends into the gap between the side surface of the prismatic portion 16 and the edge portion of the lower hole 10, so that the lower hole 10 is formed. The concave step 4 and the hexagonal square hole 3 are formed in a hexagonal shape. Note that the receiving die may be omitted in the first pressing step and the second pressing step.

  Here, as an example, the diameter of the pilot hole 10 is, for example, 7.5φ, the maximum width of the hexagon is 7.5 mm, and the diameter of the recessed step portion 4 is 8.3φ. The rectangular column portion 16 is smaller than the lower hole 10, and the concave step portion 4 is larger than the lower hole 10.

  In this way, the lower hole 10 is punched in the first pressing step, and the prismatic portion 16 enters the lower hole 10 in the second pressing step, and then is pressed by the second cylindrical pressing portion 15 to form a concave step. The portion 4 is formed, and at the same time, the square hole 3 is formed in the prepared hole.

  FIG. 4 shows a metal fitting with a pop nut in which the pop nut 1 is attached to the member 2. The member 2 is a metal square pipe, and notches 17 are formed at both ends of the upper piece 2a, and attachment holes 18 are formed at positions corresponding to the notches 17 of the lower piece 2b. Three pop nuts 1 are attached between the notches 17 of the upper piece 2a.

  FIG. 5 shows another metal fitting with a pop nut. Two large circular holes 19 are formed at substantially the center of the upper piece 2a of the square pipe, which is the member 2, at intervals in the longitudinal direction, and small attachment holes 18 are formed at positions corresponding to the large holes 19 of the lower piece 2b. Is forming. Two pop nuts 1 are attached between the large holes 19 of the upper piece 2a and one end of each square pipe.

  In this invention, the rectangular tube portion 6 of the pop nut 1 is a hexagonal shape, but other shapes or the like may be used as long as it is a non-rotating configuration that fits and locks into the square hole 3.

(A) is a partial top view of a member, (b) is the sectional drawing, (c) is a sectional view of the attachment state of a pop nut. (A) is a side view which shows the 1st press process by a 1st metal mold | die, (b) is a partial top view of the member which shows the hole formed by the press process. (A) is a side view showing a second pressing step by the second mold, (b) is a partial plan view of a member having an attachment hole formed by the pressing step, and (c) is a partially enlarged sectional view thereof. It is. (A) is a top view of a metal fitting with a pop nut, (b) is the front view, (c) is a side view. (A) is a top view of another metal fitting with a pop nut, (b) is the front view, (c) is a side view. It is a fragmentary sectional view of the attachment state of the pop nut of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pop nut 2 Member 3 Square hole 4 Recessed step part 5 Mounting hole 6 Square cylinder part 7 Outer collar 8 Buckling part 9 Cylindrical part 10 Lower hole 11 1st cylindrical press part 12 1st metal mold | die 14 2nd Mold 15 Second cylindrical press portion 16 Square column portion

Claims (2)

A cylindrical part formed with an internal thread, a bucklingable rectangular cylindrical part continuous at one end of the cylindrical part, a pop nut having an outer collar formed at the tip of the rectangular cylindrical part, and a member to which the pop nut is attached With a pop nut with
The member includes a mold having a cylindrical press portion that forms a concave step portion on the surface side periphery of the lower hole, and a prismatic portion that protrudes from the front end surface of the cylindrical press portion and is inserted into the lower hole. By using and pressing, the concave step portion is formed in the peripheral portion of the lower hole, and the lower hole is processed into a square hole similar to the cross-sectional shape of the prismatic portion,
The pop nut is fitted so that the square tube portion does not rotate into the square hole, and is fitted to the concave step portion so that the surface of the outer collar is substantially flush with the surface of the member, Furthermore, the metal fitting with a pop nut which the buckling part of the said square cylinder part latched on the back surface of the said member. This is a pop nut mounting bracket for attaching a pop nut having a cylindrical portion formed with an internal thread, a buckling-able square tube portion continuous to one end of the tube portion, and an outer collar formed at the tip of the square tube portion. And
Press using a mold having a cylindrical press portion that forms a concave step portion on the surface side periphery of the lower hole, and a prismatic portion that protrudes from the tip surface of the cylindrical press portion and is inserted into the lower hole. Accordingly, the pop nut mounting bracket in which the concave step portion is formed in the peripheral edge portion of the lower hole and the lower hole is processed into a square hole similar to the cross-sectional shape of the prismatic portion.

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