JPH07224831A - Washer for formed nut - Google Patents

Abstract

PURPOSE:To prevent a nut from being tilted even if the nut is threadedly engaged with a bolt and tightened so as to surely fasten them by providing a projecting part on a washer so as to compensate the step difference of a formed nut. CONSTITUTION:A washer 6 for a formed nut is formed into an external shape of circle as publicly knows, a hole 7 for inserting through a bolt is provided on the center part, a projecting part 8 is provided by bending up the upper plane, and step difference 4 generated on the end face of the formed nut 1 is compensated with the projecting part 8. When the female thread 3 of the formed nut 1 of which step difference 4 of the end face is filled up with the projecting part 8 of the washer 6 is threadedly engaged with the male thread 13 and tightened, the nut 1 is not tilted and flatly tightened so as not to bend a bolt 9, and hence members 10, 11 can be fastened smoothly and surely by the formed nut 1 similarly to a general nut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a washer for a molded nut. More specifically, the present invention relates to a washer which is formed by pressing, forging, casting, etc., and is combined with a forming nut having a step on the end face to stabilize this.

[0002]

2. Description of the Related Art Conventionally, a general washer sandwiched between a nut and an object to be fastened is formed of a plate material having a constant thickness because the nut has a flat end surface.

The general washer described above is obtained by alternately forming semicircular holes on the front and back sides of the main body, and forming a series of internal threads inside these semicircular holes, as shown in FIGS. 1 and 12. When used with the molded nuts in the above, a step is created on the end surface of the nut, and a gap is created between the high part and the washer.Therefore, when the nut is screwed into the bolt and tightened, the nut tilts toward the gap and the bolt However, there is a problem that it will bend and interfere with the conclusion.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of this situation, and a convex portion is provided on a washer to supplement the step of the molded nut, and even if the nut is screwed into the bolt and tightened. (EN) Provided is a washer for a molded nut that can be smoothly and securely fastened because the nut does not tilt.

[0005]

In the washer for nuts made of sheet metal according to the present invention, semicircular holes are alternately formed on the front side and the back side of the main body, and a series of internal threads are formed inside these semicircular holes. Therefore, a washer to be combined with a molded nut having a step on the end face, and a configuration in which a convex portion that complements the step generated on the end face of the molded nut is provided on the upper surface solves the problem.

[0006]

In the sheet metal nut washer according to the present invention, semicircular holes are formed alternately on the front side and the back side of the main body, and a series of internal threads are formed inside these semicircular holes, so that a step is formed on the end surface. Since the convex portion that complements the step of the end surface of the molded nut is provided, if the washer is attached to the end surface of the molded nut, the convex portion complements the step. Therefore, even if the nut is screwed into the bolt and tightened, the nut does not tilt, and therefore the bolt does not bend, so that the fastening of the member by the nut can be performed smoothly and surely like a normal nut.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a washer for a molded nut according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a molded nut formed by a press and a nut washer having a ridge formed by partially bending and bending. Figure 2
Is a vertical sectional front view of the washer. FIG. 3 is a plan view of the washer. FIG. 4 is a vertical cross-sectional front view of a nut washer having a step formed by partially bending and stacking. FIG. 5 is a plan view of the washer. FIG. 6 is a vertical cross-sectional front view of a nut washer that is stepped by molding. FIG. 7 is a front view of the washer. FIG. 8 is a vertical cross-sectional front view of a nut washer having a step formed by stacking plate materials. FIG. 9 is a vertical cross-sectional front view of a state in which members are joined together by using a press molded nut and a nut washer. FIG. 10 is a perspective view of a molded nut formed by casting a molten resin or a molten metal and a washer for this nut having a protrusion provided on the upper surface. FIG. 11 is a vertical cross-sectional front view showing a state in which members are joined together using the same molded nut and washer for nut. FIG. 12 is a plan view of the same molding nut. FIG. 13 is a plan view of a nut washer used for the nut.

In FIG. 1, reference numeral 1 denotes a molded nut formed by press working. The semicircular holes 2 are alternately formed by cutting and bending on the front side and the back side of a plate-shaped main body such as a rectangle, and the semicircular holes 2 are continuously formed inside the semicircular holes 2. The screw 3 is formed by die pressing,
Since the nut 1 is provided with the semicircular holes 2 alternately on the front side and the back side as described above, the step 4 is formed on the end surface as shown in FIGS. 1 and 9, and the ears 5, 5 are formed on both sides.

1 to 3, 6 is a washer for a molded nut, which is formed in a circular (corner or polygonal shape) outer shape as is well known, and has a hole 7 through which a bolt to be described later is inserted in the central portion. A convex portion 8 is provided on the upper surface by bending and bending a portion shown by a chain line in FIG. 3 as shown in FIG. 2, and the convex portion 8 complements the step 4 generated on the end surface of the molding nut 1.

In FIGS. 4 and 5, reference numeral 6 is another washer for a molded nut, which is formed into a corner (circle or polygon) outer shape, and a washer is provided on one side thereof as shown by a chain line in FIGS. 4 and 5. 6 is provided with an extension c which is a little less than half, and this extension c is bent and piled on the washer 6 as shown by the solid lines in FIGS. The step 4 on the end face of is supplemented.

In FIGS. 6 and 7, 6 is another washer for a molded nut, which is provided with a convex portion 8 by molding with a mold of metal or synthetic resin, and the convex portion 8 forms a step 4 on the end face of the sheet metal nut 1.
Is to be supplemented.

In FIG. 8, 6 is a washer for another molded nut, and a plate material d of a little less than half thereof is polymer-bonded to a part of the washer 6 to form a convex portion 8, and the nut made of a metal plate is formed by the convex portion 8. a
The step 4 is complemented.

In FIG. 9, 9 is a bolt for screwing the above-mentioned molding nut a to join the members 10 and 11 to be joined together.
Inserted through the holes 12 formed in the members 10 and 11 to be joined, and screwing the male screw 3 of the molded nut 1 having the step 4 of the end face complemented by the convex portion 8 of each washer 6 into the male screw 13 thereof. When tightened, the nut 1 is not tilted and is flatly tightened so that the bolt 9 is not bent, so that the molded nut 1 can smoothly and securely fasten the members 10 and 11 like a general nut.

In FIG. 10, reference numeral 1 denotes a molded nut a formed by casting a molten synthetic resin, a molten metal or the like, and a U-shaped groove 2a having a semicircular hole 2 at the bottom as shown in FIG. 12 on the front side and the back side of the block-shaped main body. Are formed in a staggered manner and are continuously formed inside the semi-circular hole 2 so that a screw 3 is also formed by molding. This nut 1 has U-shaped grooves 2a formed alternately on the front side and the back side. A step 4 as shown in FIGS. 10 and 11 is formed.

In FIG. 10, FIG. 11, and FIG. 13, 6 is a washer used for the molded nut 1 shown in FIG. 10, and the convex portion 8 which fits the step 4 of the nut 1 is bent and raised and bent and overlapped. It is formed by molding, superposition, etc., and when this convex portion 8 is engaged with the step 4 of the molding nut 1, the nut 1
Since the step 4 is complemented, when the nut 1 is screwed into the bolt 9 and tightened as shown in FIG. 11, the nut 1 does not tilt and is flatly tightened so that the bolt 9 is not bent. With the molded nut 1, the smooth and reliable members 10 and 11 can be fastened similarly to a general nut.

[0017]

As described above, the washer for molded nut according to the present invention forms the stepped portion of the molded nut which has a step on the end face because the semicircular holes are formed alternately, and the stepped portion of the molded nut is supplemented by the convex portion to make the nut a bolt. Since the nut is prevented from inclining when screwed and tightened, the molded nut has a feature that the member can be smoothly and reliably fastened like a general nut.

[Brief description of drawings]

FIG. 1 is a perspective view of a molded nut formed by pressing and a nut washer having a step formed by partially bending and raising.

FIG. 2 is a vertical sectional front view of the washer.

FIG. 3 is a plan view of the above washer.

FIG. 4 is a vertical cross-sectional front view of a washer for a molded nut that is stepped by partially bending and overlapping.

FIG. 5 is a plan view of the above washer.

FIG. 6 is a vertical cross-sectional front view of a washer for a molding nut that is stepped by molding.

FIG. 7 is a front view of the above washer.

FIG. 8 is a vertical cross-sectional front view of a washer for a molded nut, which is stepped by stacking plate materials.

FIG. 9 is a vertical cross-sectional front view of a state in which a molded nut and members are fastened using this nut washer.

FIG. 10 is a perspective view of a molded nut formed by casting a molten resin, a molten metal or the like and a nut washer having a ridge formed by bending and bending a part thereof.

FIG. 11 is a vertical cross-sectional front view showing a state in which members are fastened by using a molded nut made by casting and a washer for this nut.

FIG. 12 is a plan view of a molding nut made by casting.

FIG. 13 is a plan view of a washer for the same forming nut.

[Explanation of symbols]

 1 Sheet metal nut 4 Step 6 Washer 8 Convex part

Claims (1)

[Claims] 1. A washer which is formed by alternately forming semi-circular holes on the front side and the back side of a main body, and a series of internal threads are formed inside these semi-circular holes so as to be combined with a molding nut having a step on the end face. And a washer for a molded nut, characterized in that the upper surface is provided with a convex portion that complements a step generated on the end surface of the molded nut.