JPH0357153Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is applied to seat frames that incorporate various functional parts such as reclining parts, seat track parts, and vertical adjuster parts, such as automobile seats and other vehicle seats. This relates to a synthetic resin seat frame used as a seat frame.

(Prior technology) Reclining parts, seat track parts,
For synthetic resin seat frames where it is necessary to attach various functional parts such as vertical adjuster parts, bolt insertion holes are provided in the main body of the synthetic resin frame, and the functional parts attached to the main body of the frame are inserted into the bolt insertion holes. Generally, they are secured by tightening bolts that are inserted into the frame, but in addition to this, the bolt insertion holes have to be drilled in the main body of the frame, and if used for a long period of time, the bolt insertion holes will wear out and cause the functional parts to become loose. There is a problem in that sticking occurs, and in some cases, cracks occur from the edge of the bolt insertion hole, resulting in destruction of the frame main body. Therefore, an insert molded product in which a nut for assembling functional parts is embedded in a synthetic resin frame main body has been proposed, but an ordinary insert molded with both sides of the nut exposed from the frame main body. With molded products, there remains the problem that the nut may come off from the frame due to the impact force or insertion force in the insertion direction when inserting the bolt. In the case where the resin is embedded and covered by the main body of the frame, there remains the problem that when the bolt is screwed in, a portion of the resin gets into the screw hole, causing poor tightening of the bolt.

(Problems to be solved by the invention) What the invention aims to solve is to solve the above-mentioned problems, to be able to assemble functional parts accurately and easily, and to prevent poor tightening of bolts. To provide a durable synthetic resin seat frame that does not cause any damage and can be used for a long period of time.

(Means for Solving the Problems) The synthetic resin seat frame according to the present invention, which solves the above-mentioned problems, has flanged nuts for assembling functional parts embedded in required locations of the main body of the synthetic resin frame. In the synthetic resin seat frame, the flanged nut has the outer surface of the flange portion exposed from one side of the synthetic resin frame main body, and at least a portion of the periphery thereof is covered by a retaining portion integral with the frame main body. It is characterized by the fact that it is

(Embodiments) Next, the present invention will be described in detail with reference to illustrated embodiments.

1 is a frame main body made of synthetic resin, and the frame main body 1 is molded by a stamping method, an injection method, etc. using a strong synthetic resin material such as reinforced polypropylene resin reinforced with glass fiber. , a nut 2 with a flange for assembling functional parts is embedded in a required location, for example, on the side wall, with the flange portion 3 inside.
Further, the frame main body 1 is integrally provided with a claw-shaped or annular retaining portion 4 that covers at least a portion of the periphery of the flange portion 3 of the flanged nut 2. The outer surface is exposed on the inside of the frame main body 1, so that it will not fall off even if a considerable impact is applied to the flange nut 2 toward the inside of the frame main body 1, and it is located near the edge of the screw hole of the flange nut 2. The structure is such that a part of the resin of the frame main body 1 does not reach up to the point.

(Function) With this structure, the functional component 11 is attached to the frame main body 1 so that the bolt insertion hole 12 of the functional component 11 is connected to the threaded hole of the flanged nut 2. The inserted bolt 13 is screwed into the screw hole of the flanged nut 2 and tightened with a tightening tool such as an impact wrench to assemble the functional component 11 into the frame main body 1. Even if a strong impact force or insertion force is applied in the insertion direction of the flanged nut 2 when the bolt 13 is screwed in and tightened with a tightening tool, at least a portion of the outer surface of the flange portion 3 near the periphery will be damaged. Since a part of the nut 2 is covered with a retaining part 4 made of synthetic resin and integrally formed with the frame main body 1, the flanged nut 2 does not slip out of the frame main body 1, and the outer surface of the flange of the flanged nut 2 In order to prevent the resin of the frame main body 1 from reaching near the hole edge of the screw hole of the flange nut 2, the center portion is exposed, and the retaining portion 4 is formed only on a portion of the outer surface of the flange close to the periphery. Therefore, a part of the resin of the frame main body 1 does not reach near the edge of the screw hole, and when a bolt is screwed in, a part of the resin does not enter the screw hole and cause bolt tightening failure. , the functional component 11 can be reliably assembled to the frame main body 1. However, functional component 1
1, the flanged nut 2 is embedded in the frame main body 1 with a wide contact area including the flange portion 3 secured, so that the flanged nut 2 will not be pulled out in the direction opposite to the insertion direction of the bolt 13, and the frame main body 1 will not be sheared and destroyed. Furthermore, since the flanged nut 2 is embedded and molded, it will not rattle due to vibration or stress during long-term use, and the frame main body 1 will not be damaged by the bolts 13, so it can be used for a long time. It is. However,
To manufacture such a synthetic resin seat frame, for example, a split mold 2 as shown in Fig. 4 is used.
Prepare the lower mold 21 and upper mold 22 with 1a, and split the mold 21.
A is provided with recesses 23 for forming the retaining part 4 at required locations, and a pin 24 for attaching the embedded member.
A flanged nut 2 is set on the pin 24 during molding, a mat-like molding material such as polypropylene resin reinforced with glass fiber for stamping molding is set on the lower mold 21, and the upper mold 22 is used to set the flanged nut 2 on the pin 24. When stamping molding is performed, a part of the resin material in the pine-like molding material flows and forms the recess 23.
The retaining part 4 is molded together with the frame main body 1 at the same time, and the flange nut 2 is embedded and integrated, and can be easily molded using a stamping molding method or an injection molding method using a strong synthetic resin material. It also has the advantage of being able to be mass-produced at low cost since it can be molded into shapes.

(Effects of the invention) As is clear from the above description, the present invention is such that the flanged nut embedded in the main body of the synthetic resin frame has the outer surface of the flange portion exposed from one side of the main body of the synthetic resin frame. At least a part of the periphery is covered by a retaining part that is integrated with the frame main body, so this retaining part prevents bolt insertion of flanged nuts, which is likely to occur due to bolt insertion force when assembling functional parts. In addition, after the functional parts are assembled, the main body of the frame will be sandwiched between the flange of the flanged nut and the functional parts, so the bolt tightening torque will cause the flanged nuts to move toward the functional parts. Also, during long-term use, the bolt insertion hole expands due to wear and is unlikely to rattle or break from the hole edge, so it can be used for a long time. The retaining part is formed only on the outer surface of the flange near the periphery, and some of the resin that makes up the frame does not reach near the edge of the screw hole, so when inserting the bolt, Part of the resin does not enter the screw hole and cause bolt tightening failure, and it is also easy to manufacture and eliminates the need for drilling after the frame is formed, so it has the advantage of being mass-produced at low cost. be.

Therefore, the present invention has great practical value as it solves the problem of synthetic resin seat frames in which flanged nuts for assembling functional parts are embedded in the required locations of the synthetic resin frame main body. It is something.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view of the main part, and Fig. 3 is a partially cutaway perspective view showing the main part of another embodiment of the invention. FIG. 4 is a partially cutaway front view showing the main parts of a mold for manufacturing the present invention. 1... Frame main body, 2... Nut with flange, 3... Flange part, 4... Retaining part.

Claims (1)

[Scope of utility model registration request] In a synthetic resin seat frame in which flanged nuts 2 for assembling functional parts are embedded in required locations of a frame main body 1 made of synthetic resin, the outer surface of the flange portion 3 of the flanged nuts 2 is made of synthetic resin. A seat frame made of synthetic resin, characterized in that the frame main body 1 is exposed from one side and at least a part of its periphery is covered by a retaining part 4 integral with the frame main body 1.