JP2008180318A - Nut mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost by simplifying a mounting structure, easily mount a nut on a plate member, and reduce weight. <P>SOLUTION: The nut 13 formed by bending a punched-out sheet metal is storably held on the nut holding part 11 of a first plate member 1 as a resin molded product. The nut 13 comprises a flat plate piece part 23 and first and second folded back piece parts 25, 27 folded back from both ends of the flat plate piece part 23 to the rear surface side at intervals from the flat plate piece part 23. With the nut 13 disposed in a nut storage space 19, the flat plate piece part 23 is brought into contact or moved close to the inner surface of the vertical wall part 15 of the nut holding part 11, and the first folded back piece part 25 is pressed against the bottom wall part 17 of the nut holding part 11 around the second screw insertion hole 21. When the first plate member 1 is tightened, the inner peripheral edge of the screw hole 29 of the flat plate piece part 23 is screwed with the screw groove 5a of a bolt 5, and the ends of the first and second folded back piece parts 25, 27 are screwed with the screw groove 5a of the bolt 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement of a nut mounting structure.

In Patent Document 1, a plate material in which a screw insertion hole is formed, a plate-shaped metal stopper member in which a hexagonal hole is formed, and a metal having a substantially U-shaped cross section in which a screw insertion hole is formed. We prepared a retaining member, welded to the plate member so that the hexagonal hole corresponded to the screw insertion hole, and fitted a block-shaped hexagonal nut to the hexagonal hole to stop the hexagonal nut. There is disclosed a nut mounting structure in which the retaining member is engaged with the retaining member so as to cover the retaining member from the state, and the hexagon nut is accommodated and held in the retaining member so as not to fall off.
Japanese Patent Laid-Open No. 2001-27216 (pages 4, 5 and 1, 3, 5)

  However, in the above-mentioned Patent Document 1, since the plate material, the locking member, and the retaining member are separately manufactured and assembled, the structure is complicated and more than one manufacturing man-hour is required. A dedicated device is required for each production process, and further, it takes time to assemble, resulting in an increase in cost.

  Moreover, since a hexagon nut is a block-shaped lump and a rotation prevention member and a retaining member are metal, weight increases.

  The present invention has been made in view of the above points, and the object of the present invention is to simplify the mounting structure and reduce the cost, to easily attach the nut to the plate material, and to further reduce the weight. is there.

  In order to achieve the above object, the present invention is characterized in that the plate material is made of resin and the nut holding portion is integrally formed, and the structure of the nut is devised.

  Specifically, the present invention is directed to a mounting structure for attaching a nut to a plate material, and has taken the following solution.

  That is, according to the invention described in claim 1, the plate material is integrally formed with a plate material body through which the first screw insertion hole is formed, and a nut formed so as to cover the first screw insertion hole on one surface of the plate material body. A nut holding part that accommodates and holds the nut, wherein the nut holding part is a pair of vertically opposed ones that are integrally projected so as to sandwich the first screw insertion hole on one side of the plate body. A wall portion and a bottom wall portion integrally connected to the protruding ends of the vertical wall portions so as to be parallel to the plate body and forming a substantially rectangular nut housing space inside the vertical wall portions. And a second screw insertion hole is formed in the bottom wall portion so as to correspond to the first screw insertion hole, and the nut is formed by bending a punching material of a thin metal plate and fastening the plate material When the screw thread is screwed into the thread groove of the screw member A substantially rectangular flat plate piece portion through which a screw hole is formed, and first and second folded piece portions folded back from the flat plate piece portion on both sides of the flat plate piece from the opposite ends to the back side, The flat plate piece abuts or approaches the inner surfaces of the vertical wall portions in a state where the nut is disposed in the nut accommodating space of the nut holding portion, and the first folded piece portion of the first and second folded piece portions is In a state where the nut is disposed in the nut receiving space of the nut holding portion, the nut is received and held around the second screw insertion hole of the bottom wall portion, and the nut is received and held in the nut holding portion, and the first and second folded piece portions A substantially semicircular cutout portion is formed at at least one of the tips of which the peripheral portion is screwed into the screw groove of the screw member that has passed through the screw hole when the plate member is fastened.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, a punched portion is formed in the folded portion between the flat plate piece portion of the nut and the first and second folded piece portions. And

  According to the first aspect of the present invention, since the plate material is constituted by the resin molded product in which the plate material main body and the nut holding portion are integrally molded, the weight is light and the molten resin is injected and filled into the mold. It can be easily molded in a single process.

  In addition, it is not necessary to go through a plurality of manufacturing steps as in Patent Document 1, and it does not take time and effort, and a dedicated device and assembly required for each manufacturing process are not required, and costs can be reduced.

  On the other hand, since the nut is formed of a bent metal thin plate, the weight can be reduced as compared with a hexagon nut that is a block-shaped lump.

  In addition, the nut is simply inserted into the nut housing space of the nut holding part of the plate material from the side open side, and the first folded piece of the nut is pressed against the bottom wall part of the nut holding part so as not to fall off. In addition to being able to stop, the flat plate piece portion of the nut can be brought into contact with or close to the inner surfaces of the two vertical wall portions of the nut holding portion, and the nut can be easily attached to the plate material.

  Furthermore, since the screwing portion is composed of two upper and lower stages, the bolt can be stably screwed to the nut, and the plate material can be securely fastened.

  According to the invention which concerns on Claim 2, it is easy to bend | fold, since there is a board | plate material area | region of the both sides by having a punching part, and it can bend the 1st and 2nd folding piece part easily.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a nut mounting structure according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a first plate member, and 3 denotes a second plate member 3 fastened to the first plate member 1 by bolts 5 as screw members. Although the first and second plate members 1 and 3 are both resin molded products, the second plate member 3 is not necessarily made of resin.

  As shown in FIG. 2, the first plate member 1 includes a plate member body 9 in which a circular first screw insertion hole 7 is formed so as to cover the first screw insertion hole 7 on one surface of the plate member body 9. The nut holding part 11 is formed integrally with the nut holding part 11, and the nut 13 is accommodated and held in the nut holding part 11.

  The nut holding portion 11 includes a pair of vertical wall portions 15 that are integrally protruded so as to sandwich the first screw insertion hole 7 on one surface of the plate body 9, A bottom wall portion 17 is integrally connected to the protruding end so as to be parallel to the plate body 9, and the bottom wall portion 17 and the both vertical wall portions 15 have a substantially rectangular shape inside the nut holding portion 11. A nut housing space 19 is formed. In addition, a circular second screw insertion hole 21 is formed through the bottom wall portion 17 so as to correspond to the first screw insertion hole 7. The nut 13 is inserted into the nut accommodating space 19 from the side opening side of the nut holding portion 11.

  On the other hand, the nut 13 is formed by bending a punching material of a thin metal plate 13 'as shown in FIG. 6, and as shown in FIGS. 23 and substantially rectangular first and second folded piece portions 25 and 27 folded back from the both ends of the flat plate piece portion 23 with a distance from the flat plate piece portion 23. In a state in which the flat plate piece 23 is accommodated and held in the nut holding portion 11 of the plate member 1, the nut 13 is stopped by contacting or approaching the inner surfaces of the vertical wall portions 15.

  A circular screw hole 29 is formed through the center of the flat plate piece portion 23, and a slit 31 is formed at one inner peripheral edge of the screw hole 29. The slit 31 serves as a boundary in the vertical direction on both sides thereof. By different heights, when the first plate 1 is fastened to the second plate 3, a single thread 29 a that is screwed into the screw groove 5 a of the bolt 5 is formed by the inner peripheral edge of the screw hole 29. .

  The tips of the first and second folded piece portions 25 and 27 are close to each other below the screw hole 29, and the tip of the first folded piece portion 25 is positioned below the tip of the second folded piece portion 27. is doing.

  Semi-circular cutout portions 25a and 27a are formed at the tips of the first and second folded piece portions 25 and 27, respectively, and each cutout portion 25a and 27a is one pitch of the screw groove 5a of the bolt 5. It is shifted up and down by an amount, and one thread is constituted by the inner peripheral edge of the notches 25a and 27a. The notches 25a and 27a are screwed into the screw groove 5a of the bolt 5 that has passed through the screw hole 29 when the first plate member 1 is fastened to the second plate member 3.

  Of these first and second folded piece portions 25 and 27, the first folded piece portion 25 is a second screw of the bottom wall portion 17 in a state where the nut 13 is disposed in the nut accommodating space 19 of the nut holding portion 11. The nut 13 is accommodated and held in the nut holding portion 11 in pressure contact with the insertion hole 21, and the nut 13 is prevented from being pulled out. Note that the tip of the first folded piece 25 does not necessarily have to be screwed into the screw groove 5a of the bolt 5.

  In the folded portion 33 between the flat plate piece portion 23 of the nut 13 and the first and second folded piece portions 25 and 27, a punched portion 35 is formed so as to be easily bent.

  The nut 13 thus configured is a punched material of a strip-shaped thin metal plate 13 'as shown in FIG. 6 before bending, and the screw hole 29 and the slit 31 are formed through the center thereof. Rectangular cutout portions 35 are formed on both sides, and semicircular cutout portions 25a and 27a are formed on both ends thereof. In FIG. 6, the region between the two punched portions 35 is the flat plate piece portion 23 of the nut 13, and the region between the punched portion 35 on the right side of FIG. 6 and the cutout portion 25 a is the first folded piece portion 25. The area between the left side punching portion 35 and the cutout portion 27 a is the second folded piece portion 27. Then, the first and second folded pieces 25 and 27 are bent to form the nut 13 by bending the narrow regions on both sides of the both punched portions 35 of the metal thin plate 13 ′.

  The nut 13 thus formed is housed and held in the nut holding portion 11 (nut housing space 19) of the first plate member 1 and attached to the first plate member 1, and the screw hole 29 has the first and second screw holes. It is made to correspond to the insertion holes 7 and 21. And the 2nd board | plate material 3 is piled up on the anti-nut holding | maintenance part 11 side of the 1st board | plate material 1, the screw insertion hole 3a is matched with the 1st screw | thread insertion hole 7 of the said 1st board | plate material 1, and the volt | bolt 5 is made into the 2nd board | plate material 3. The screw insertion hole 3a is inserted into the first screw insertion hole 7 of the first plate member 1 so that the screw groove 5a is screwed into the screw thread (inner peripheral edge) of the screw hole 29 of the nut 13, and the first and second foldings are made. The first and second plate members 1 are fastened to the second plate member 3 by being screwed into the inner peripheral edges of the notches 25a and 27a at the tip portions of the pieces 25 and 27 and inserted through the second screw insertion holes 21 of the first plate member 1 to the outside. Like to do.

  Thus, in this embodiment, since the 1st board | plate material 1 is comprised with the resin integral molded product of the board | plate body main body 9 and the nut holding | maintenance part 11, it is lightweight and also inject | pours and fills molten resin to a shaping | molding die. It can be easily molded in a single process.

  Further, in this embodiment, it is not necessary to go through a plurality of manufacturing steps as in Patent Document 1, and it does not take time and effort, and a dedicated device and assembly required for each manufacturing process are unnecessary, thereby reducing costs. be able to.

  Furthermore, in this embodiment, since the nut 13 is formed of a bent material of a thin metal plate 13 ', the weight can be reduced as compared with a hexagon nut that is a block-shaped lump.

  In addition, in this embodiment, the nut 13 is held in the nut holding space 19 of the first plate 1 by inserting the nut 13 into the nut accommodating space 19 from the open side on the side. It can be pressed against the bottom wall portion 17 of the portion 11 so as not to fall off, and the flat plate piece portion 23 of the nut 13 is brought into contact with or close to the inner surfaces of both vertical wall portions 15 of the nut holding portion 11. The nut 13 can be easily attached to the first plate 1.

  Furthermore, in this embodiment, the presence of the punched portions 35 makes it easy to fold because the first plate material 1 region on both sides thereof is small, and the first and second folded piece portions 25 and 27 can be easily bent. .

  Furthermore, in this embodiment, the nut 13 has two upper and lower screwed portions, so that the bolt 5 can be stably screwed to the nut 13, and the first plate 1 is joined to the second plate 3. It can be securely fastened.

  The present invention is useful for an attachment structure for attaching a nut to a plate material.

It is sectional drawing of the state which fastened the 1st board | plate material to which the nut was attached to the 2nd board | plate material. It is the perspective view which looked at the nut holding part of the 1st plate material from the back side. It is a top view of a nut. It is a front view of a nut. It is a bottom view of a nut. It is a top view of the thin metal plate before bending a nut.

Explanation of symbols

1 First plate 5 Bolt (screw member)
5a Screw groove 7 First screw insertion hole 9 Plate body 11 Nut holding part 13 Nut 13 'Metal thin plate 15 Vertical wall part 17 Bottom wall part 19 Nut accommodating space 21 Second screw insertion hole 23 Flat plate part 25 First folded piece part 25a, 27a Notch portion 27 Second folded piece portion 29 Screw hole 33 Turned portion 35 Flawless portion

Claims (2)

A mounting structure for attaching a nut to a plate material,
The plate material includes a plate body having a first screw insertion hole formed therethrough and a nut holding portion that is integrally formed on one surface of the plate material body so as to cover the first screw insertion hole and accommodates and holds the nut. Molded product,
The nut holding portion includes a pair of opposing vertical wall portions that are integrally projected on one side of the plate body so as to sandwich the first screw insertion hole, and the plate body main body at the protruding ends of the both vertical wall portions. And a bottom wall portion which is integrally connected so as to be parallel to each other and forms a substantially rectangular nut housing space inside the two vertical wall portions, and a second screw insertion hole is formed in the bottom wall portion. A through-hole is formed so as to correspond to the first screw insertion hole,
The nut is formed by bending a punching material of a thin metal plate, and a screw hole that is formed by penetrating a screw thread that is threaded into a screw groove of a screw member at the inner periphery when the plate material is fastened is formed. The flat plate piece includes a rectangular flat plate piece and first and second folded pieces that are folded back from the flat plate piece from both ends to the back surface side. The flat plate piece includes the nut and the nut. Abutting or approaching the inner surfaces of the vertical wall portions in a state of being arranged in the nut accommodating space of the holding portion, and the first folded piece portion of the first and second folded piece portions accommodates the nut in the nut holding portion. The nut is accommodated and held in the nut holding portion by pressing around the second screw insertion hole of the bottom wall portion in a state of being disposed in the space, and a plate material is provided at the tip of at least one of the first and second folded piece portions At the time of fastening, the peripheral portion is in the screw groove of the screw member that has passed through the screw hole. Nut mounting structures characterized by that the notch of substantially semi-circular to focus is formed. In the nut mounting structure according to claim 1,
A nut mounting structure in which a punched portion is formed in a folded portion between the flat plate piece portion of the nut and the first and second folded piece portions.

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