JP2000346028A - Attachment fixture with bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment fixture with a bolt, which can prevent an attaching member or a metal plate itself from being rotated together with an attaching nut when the latter is screwed onto a bolt body provided to the metal body so as to secure the attaching member, and which can prevent the attaching member or the metal plate from being freely rotated even though an external force is applied thereto after the attachment thereof. SOLUTION: Upon screwing and fastening an attaching nut 5 onto a bolt body 2 raised and formed by squeezing a metal plate 1 so as to clamp and secure an attaching member 4 between the metal plate 1 and the attaching nut 5, a detent protrusion 3 is projected from the metal plate 1 while the attaching member 4 is formed with an engaging part 4B into which the detent protrusion 3 is fitted, thereby it is possible to restrain the relative rotation of the metal plate 1 and the attaching member 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting bracket integrally provided with a bolt, and more specifically, to a predetermined member by screwing a mounting nut onto the integrally provided bolt and tightening. The present invention relates to a mounting bracket with a bolt devised so that the bolt can be bolted.

[0002]

2. Description of the Related Art For example, when attaching a safety belt (seat belt) of an automobile to a vehicle body, first, a bolt with a plate is welded to each of a floor plate and a side pillar of the vehicle body, and a mounting nut is screwed to the bolt. Although each end of the safety belt is fixed individually, the bolt with plate has a structure in which a separately manufactured bolt is welded to the upper surface of the plate, so that the welding work is troublesome and the cost increases. In addition, when welding is incomplete, there is a risk that bolts may come off from the plate due to external stress.

Accordingly, a metal plate is subjected to drawing to form a cylindrical body (bolt body) having a cylindrical cross section, and a flange formed with an external thread for screwing a mounting nut to an outer peripheral surface of the bolt body. Bolts (bolts with plates) were considered.

According to the above-mentioned bolt with flange, a single metal plate is subjected to repeated drawing to form a bolt body at the center of the outward flange so as to be formed integrally, and the bolt is welded to the plate. Since there is no need to perform such a process, the structure is simple, the manufacturing cost is low, and the mechanical strength is excellent.

[0005]

However, the above-mentioned conventional bolt with flange is screwed with a mounting nut to the bolt body and tightened, so that, for example, the tip of a safety belt is provided between the mounting nut and the flange (plate). In the case where the mounting member is sandwiched and fixed, the mounting member rotates together with the screwing rotation of the mounting nut, so that it is difficult to keep the mounting angle (mounting direction) constant. In order to correct the mounting angle after mounting, it is necessary to repeat the work of loosening and retightening the mounting nut, which causes a problem that the mounting work becomes complicated. There was a problem that the attachment nut was loosely rotated and loosened or came off.

Accordingly, a technical problem of the present invention is that when a mounting nut is screwed into a bolt provided on a metal plate to fasten and fix the mounting member, the mounting member or the metal plate itself turns together. It is another object of the present invention to provide a bolted mounting bracket which is designed not to rotate without permission even if the mounting member or the metal plate receives external stress after mounting.

[0007]

Means taken by the present invention to solve the above-mentioned technical problems are as follows.

(1) A bolt having a cylindrical cross section is projected and formed by applying drawing to an appropriate position of a metal plate formed in an arbitrary shape, and a male screw is formed on an outer peripheral surface of the bolt, and the bolt is formed. By screwing and tightening the mounting nut, a predetermined mounting member is sandwiched and fixed between the mounting nut and the metal plate, and at the same time, the mounting member is held and fixed on the surface of the metal plate. And a locking stopper projecting into the hole-shaped or groove-shaped engaging portion provided on the mounting member. (Claim 1)

(2) One or more detent protrusions are formed on the same surface as the surface of the metal plate on which the bolt body is formed. (Claim 2)

According to the means according to claim 1 described in the above (1), when the mounting nut is screwed into the bolt body of the metal plate to fasten and fix the mounting member, the engagement provided on the mounting member. Since the non-rotating protrusion protruding from the metal plate is fitted to the part, even if the mounting nut is screwed and rotated, the mounting member or the metal plate itself does not rotate together,
In addition, since the mounting member or the metal plate does not rotate on its own even if an external stress is applied after the mounting, the mounting of the metal plate and the mounting member by tightening the mounting nut can be performed very easily and reliably. This makes it possible to reliably prevent loosening after mounting.

According to the means according to the second aspect described in the above (2), since the bolt body and the detent projection are formed so as to protrude on the same surface of the metal plate, the mounting member is connected to the metal plate by tightening the mounting nut. It is possible to fasten and fix to one side surface, that is, the surface on which the bolt body and the detent projection are formed.

As described above, the above (1) to (1)
By solving the above technical problem by means of (2),
The problem of the conventional technique can be solved.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a mounting bracket with bolts according to the present invention. FIG. (B) is a cross-sectional view along the line XX, (a) of FIG. 2 is an exploded perspective view illustrating an example of use of the bolted mounting bracket of the present invention shown in FIG. 1, (B) is a front sectional view showing the attached state.

In these drawings, reference numeral 1 denotes a metal plate stamped and formed in a circular, rectangular, or other irregular shape as a whole, and 2 denotes a central portion of one side of the metal plate 1, for example, a female mold. After repeatedly drawing using a die and an inner punch (both not shown), a hole is formed in the tip of the drawing to raise the entire body into a small-diameter cylindrical section. It is a male screw formed by tapping on the outer peripheral surface.

Reference numerals 3 and 3 denote one side surface of the metal plate 1,
And detents formed on both front and rear portions of the bolt body 2 with the bolt body 2 interposed therebetween.
Is formed by, for example, embossing or louvering, but the processing method is arbitrary, and furthermore, any of the shape and formation position of each of the detent projections 3, 3 and the number of moldings are arbitrary. Needless to say, the present invention is not limited to the illustrated one.

In FIGS. 2A and 2B, reference numeral 4 denotes a mounting member such as the above-mentioned mounting bracket for the tip of the safety belt which is mounted on the metal plate 1, and 4A is formed at the center thereof. Insertion hole for inserting the bolt body 2
Reference numerals B and 4B denote engagement portions for fitting the detent protrusions 3 provided on the mounting member 4, and the drawings show the engagement portions 4B and 4B formed in a long hole shape. However, this is an example of the embodiment, and it goes without saying that the shape, the number, and the formation position change depending on the shape, the number, and the formation position of the detent protrusions 3, 3 to be fitted, respectively. In some cases, the groove may be formed without opening, and the selection is arbitrary.

The screw 5 is screwed into the male screw 2R of the bolt body 2 and tightened, so that the mounting member 4 is sandwiched and fixed between the bottom surface and the metal plate 1 as shown in FIG. The mounting nut 6 is a washer. When the mounting nut 5 is tightened and fixed, the locking stoppers 3 of the metal plate 1
B, 4B, the rotation of the mounting member 4 and the metal plate 1 is prevented from each other, and the free rotation after the mounting is similarly suppressed.

In order to mount the mounting member 4 using the metal plate 1 shown in FIG. 1, the bolt 2 of the metal plate 1 is attached to the center of the mounting member 4 as shown in FIGS. By projecting from the lower side to the upper surface side through an insertion hole 4A drilled in the portion, the mounting nut 4 is screwed into the bolt body 2 and tightened, so that the mounting member 4
In a state where the rotation preventing protrusions 3 and 3 are engaged in the insides B and 4B, the metal plate 1 can be tightened and fixed between the mounting nut 5 with the washer 6 interposed therebetween.

Although not shown, when the mounting member 4 is the above-mentioned mounting bracket for the end of the safety belt, the bottom surface of the metal plate 1 is welded to the floor surface of the vehicle body, a side pillar, or the like, so that the safety belt is Can be fixed to the floor and the side pillars, respectively, but the mounting bracket with bolts of the present invention can be used for mounting parts of various machines and devices. Of course, it is not limited to.

Next, FIG. 3A is a plan view illustrating another configuration of the present invention described in the first and second aspects, and FIG.
(B) is a cross-sectional view taken along the line YY, (A) of FIG. 4 is an exploded perspective view illustrating an example of use of the mounting bracket with bolts according to the present invention shown in FIG. 3, and (B) is its mounting. FIG. 2 is a front sectional view showing a state, in which 1T is a metal plate formed in an elongated bracket shape as a whole.
2 is different from the metal plate 1 shown in FIG. 2 only in that the whole is elongated, and only a single anti-rotation protrusion 3T is formed on the top surface of the tip side of the metal plate 1T. Are the same, and a detailed description thereof will be omitted.

In order to mount the mounting member 4 using the metal plate 1T shown in FIG. 3, as shown in FIGS. 4 (a) and 4 (b), the bolt 2 is attached to the center of the mounting member 4 on the front end side. Projecting from the lower side to the upper side through the insertion hole 4A
Next, the mounting nut 5 is connected to the bolt body 2 of the metal plate 1T.
As shown in the figure, the bottom surface of the nut 5 and the metal plate 1T with the washer 6 interposed therebetween are fitted to the mounting member 4 with the rotation preventing projection 3T fitted in the engaging portion 4C by screwing from above. Can be tightened and fixed.

When the present invention shown in FIGS. 3 and 4 is used as the above-described safety belt mounting device, the root-end side 1T 'of the above-mentioned bracket-shaped elongated metal plate 1T is provided at the tip end mounting portion of the safety belt. And the mounting member 4 is a floor plate or a side pillar of the vehicle body. This is an example of the embodiment as described above, and the present invention is applicable to parts of various machines and devices including an automobile. It can be used for mounting.

[0023]

As described above, according to the mounting bracket with bolts according to the present invention, it is suitable for use when mounting various parts on an airframe, a device, or the like. In the tightening, both the metal plate and the mounting member are integrated by the engagement of the engaging portion and the rotation preventing projection, so that the metal plate or the mounting member does not rotate together with the mounting nut. Therefore, it has the advantage that both the metal plate and the mounting member can be mounted in a state where they are correctly positioned with each other, and after the mounting, the metal plate or the mounting member does not rotate freely due to external stress. The advantage of maintaining the tightened state of forever is that the various nuts can be mounted accurately and securely by tightening the mounting nut. It includes the features.

[Brief description of the drawings]

FIG. 1 (a) is a plan view illustrating the configuration of a mounting bracket with bolts according to the present invention described in claims 1 and 2,
(B) is a cross-sectional view along the line XX.

FIG. 2A is an exploded perspective view illustrating an example of use of the mounting bracket with bolts according to the present invention shown in FIG. 1, and FIG. 2B is a front sectional view showing the mounted state.

FIG. 3 (a) is a plan view illustrating the configuration of another embodiment of the mounting bracket with bolts according to the first and second aspects of the present invention, and (b) is along the line YY. It is sectional drawing.

4 (a) is an exploded perspective view illustrating an example of use of the mounting bracket with bolts according to the present invention shown in FIG. 3, and FIG. 4 (b) is a front sectional view showing the mounting state.

[Explanation of symbols]

 1, 1T metal plate 2 bolt body 2R male screw 3, 3T detent projection 4 mounting member 4B, 4C engaging portion 5 mounting nut

Claims (2)

[Claims] 1. A bolt body having a cylindrical cross section is formed by applying drawing to an appropriate position on a metal plate formed into an arbitrary shape, and a male screw is formed on an outer peripheral surface of the bolt body and attached to the bolt. By screwing and tightening the nut,
A predetermined mounting member is sandwiched and fixed between the mounting nut and the metal plate, and a hole or a groove provided in the mounting member in clamping and fixing the mounting member on the surface of the metal plate. A mounting bracket with bolts, characterized in that a non-rotating protruding portion that fits with the engaging portion of the shape protrudes. 2. The mounting bracket with a nut according to claim 1, wherein one or a plurality of detent protrusions are formed on the same surface as the surface of the metal plate on which the bolt body is formed. .