JPS6315611Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a threaded fitting for preventing co-alignment, in which a plurality of threaded bodies such as bolts and nuts are attached to a connecting plate.

(Prior Art) Various threaded fittings in which a plurality of threaded bodies are attached to a connecting plate are known in the past, but in the conventional threaded fitting of this kind, the screw bodies are integrally attached to the connecting plate. Therefore, when inserting a screw body into multiple insertion holes arranged in a mounting member or a mounted member, if there is a dimensional error in the insertion hole spacing or the connecting plate material is warped, the screw body may be inserted. Not only is it not easy to insert the screw body, but if the screw body is forcefully inserted, the connecting plate material may be deformed or the screw threads may be crushed when the screws are tightened. Therefore, as a threaded fitting to prevent joint movement, the screw body cannot be rotated with respect to the connecting plate material but can be tilted, and is made of a long and thin plate with a circular hole at one end and an oblong hole at the other end. A bolt is inserted into the circular hole and the oblong hole of the connecting plate material, which has claw pieces bent upwardly on the side edge of the circular hole and the oblong hole. A bolt was first proposed in which the bolt is inserted so that it is supported in contact with the bolt, and the claw is brought into contact with the bolt from the side to the top of the head to prevent the bolt from coming off and rotating, and this is disclosed in Japanese Utility Model Application Publication No. 56-75313. Published by.

(Problem that the device aims to solve) However, in the above-mentioned system, the prevention of slipping out and rotation is achieved only by claw pieces connected to the side edges of the connecting plate, which makes the system unstable and labor-intensive to manufacture, making it difficult to mass-produce cheaply.

(Means for Solving the Problems) The present invention relates to a threaded fitting for preventing co-separation, which solves the above-mentioned problems. A square head of a screw body having a square head and a flange portion is loosely fitted into each square hole, and the corner of the square head reaches outside the edge of the square hole of the connecting plate material. The present invention is characterized in that a retaining protrusion is formed which is caulked to hold each screw body so that it cannot rotate relative to the connecting plate material but can tilt.

(Function) This type of threaded fitting is made by inserting the threaded body into multiple insertion holes provided in the mounting member or the mounted member, and screwing a nut or bolt into the threaded part of each threaded body. Fixing the mounted member to the mounting member is the same as with conventional threaded fittings of this type, but since the threaded member is allowed to tilt slightly when inserted into the insertion hole, the mounting member and the mounted There is no problem even if there is a slight error in the spacing between the insertion holes of the member or the spacing of the square holes in the connecting plate.

(Embodiment) Next, the present invention will be described in detail with reference to the illustrated embodiment. Reference numeral 1 denotes hexagonal square holes provided at both ends of a long and narrow connecting plate 2 made of a metal plate such as a steel plate. , each square hole 1 is of a size such that a square head 4 of a bolt-like screw body 3 (to be described later) is loosely fitted therein without being allowed to rotate. Reference numeral 3 denotes a bolt-like screw body having a threaded portion 8 formed in the shaft portion, and the screw body 3 has the square hole 1 at the lower end of the hexagonal square head 4.
The square head 4 is loosely fitted into the square hole 1 from below, and the upper half of the corner of the square head 4 is caulked to fit in the middle of the corner. A retaining protrusion 6 that reaches outside the hole edge of the square hole 1 is formed by crushing, and this retaining protrusion 6
The square hole edge of the connecting plate 2 is held between the connecting plate 2 and the flange portion 5, and each screw body 3 is held so that it cannot rotate relative to the connecting plate 2 but can tilt. In addition, 7 in the figure is used to accurately position the threaded fitting at the required location on the mounting member or the member to be mounted.
This is a downward cut-out piece provided as necessary between the square holes 1, 1 of the connecting plate material 2.

With this structure, the threaded bodies 3 are inserted into a plurality of insertion holes arranged at required intervals in the mounting member or the mounted member, and the threaded portion 8 of each threaded body 3 is
Fixing the mounted member to the mounting member by screwing nuts or bolts into the mounting member is similar to conventional threaded fittings of this type, but each threaded body 3 is attached to the connecting plate 2 by connecting the connecting plate made of a metal plate. A square head 4 having a slightly smaller outer diameter is loosely fitted into a plurality of square holes 1 provided in the square hole 2, and a flange 5 formed at the lower end of the square head 4 and a flange 5 formed at the lower end of the square head 4 are formed. Since each screw body 3 is held between the required number of retaining protrusions 6 which are caulked at the corners so that it cannot rotate relative to the connecting plate 2 but can tilt, the mounting member There may be a dimensional error in the insertion hole spacing of the mounted member, or the connecting plate material 2 may be warped, resulting in a slight difference between the axial center line spacing of each screw body 3 and the axial center line spacing of each insertion hole. Even if there is a misalignment, the mutual axis distance can be adjusted by tilting the screw bodies 3, and therefore each screw body 3 can be inserted into each insertion hole accurately. In addition, even if the threaded fitting is tilted with respect to the mounting member or the mounted member, the screws are tightened with the tilt of the screw body 3 corrected, so there is no possibility that the connecting plate material 2 will be deformed or the threads will be damaged. There is no risk of crushing, and since the screw body 3 held by the connecting plate 2 has its square head 4 engaged with the square hole 1, the screw body 3 rotates during screw tightening work. Not at all. In addition, since the screw body 3 is prevented from rotating relative to the connecting plate 2 by fitting the square head 4 into the square hole 1, it can be done accurately and also prevented from coming off at the corner between the flange portion 5 and the square head 4. This is done by crushing the retaining protrusion 6.
An extremely stable state can be ensured, and the strength is significantly superior to that of the conventional method in which a part of the connecting plate 2 is bent as a claw piece to prevent rotation or slipping out. Since there is no need to tension the claw pieces 2, etc., there is no waste, and the formation of the retaining protrusion 6 from the corner of the square head 4 can be done with a simple caulking device, making mass production easy. .

(Effect of the invention) As is clear from the above description, the present invention is a device for preventing co-alignment in which the screw body cannot be rotated with respect to the connecting plate material but can be tilted to compensate for dimensional errors. In this threaded fitting, the screw body is prevented from rotating relative to the connecting plate material by fitting the square hole provided in the connecting plate material with the square head of the screw body, and the flange portion and the corner of the square head are fitted to prevent it from coming off. Since this is done using a crushed protrusion to prevent it from coming off, it has excellent stability and will not rotate or fall off even if excessive force is applied. If you prepare a plate material and a screw body with a flange, loosely fit the square head of the screw body into the square hole of the connecting plate material, and then crush the corner that can be easily caulked to form a protrusion to prevent it from coming off, the product can be completed. Therefore, it has various advantages such as being able to be mass-produced efficiently using the minimum amount of material, and is of great practical value as a solution to the problems of conventional threaded fittings of this type.

[Brief explanation of the drawing]

The drawing is a partially cutaway perspective view showing an embodiment of the present invention. 1...Square hole, 2...Connecting plate material, 3...Screw body,
4... Square head, 5... Flange part, 6... Retention protrusion.

Claims (1)

[Scope of utility model registration request] A square head 4 of a screw body 3 having a square head 4 and a flange portion 5 is loosely fitted into each square hole 1 of a connecting plate material 2 in which a plurality of square holes 1 are arranged at required intervals, and The corners of the square head 4 are caulked so as to reach outside the edge of the square hole 1 of the connecting plate 2, so that each screw body 3 cannot be rotated relative to the connecting plate 2, but cannot be tilted. A threaded metal fitting characterized in that it is formed with a protrusion 6 for preventing it from coming off.