JP4374705B2 - Functional member mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a functional member mounting structure for mounting a functional member to one side of a frame.
[0002]
[Prior art]
Generally, to mount the functional member on one side of the frame, it means for welding directly functional member on one side surface of the frame taken. In recent years, various types of structural parts have been reduced in weight, and a frame constituting the structural part is integrally formed using a light alloy such as a magnesium alloy or an aluminum alloy as a molding material. Even in this frame body, various functional members are attached to constitute a structural part. However, since the functional member requires high strength and rigidity, the functional member is made of iron, etc. It is made of a foreign metal material. For this reason, it is difficult to weld the functional member directly in the frame body. As a means for attaching the functional member to the frame body, there is a fastening means for fastening with a mounting bolt and a mounting nut shown in FIG. Generally taken.
[0003]
FIG. 1 shows a means for attaching a ratchet 21 which is a functional member constituting a reclining mechanism to a seat back frame 10 which is a frame body integrally molded from a light alloy as a molding material. As a means for attaching the upper arm 21 having a ratchet on the side surface, a fastening means for fastening with a mounting bolt 22 and a mounting nut 23 is employed. In the fastening means, the insertion holes 11a and 12a of the attachment bolts 22 provided in the side frame portions 11 and 12 of the seat back frame 10 and the insertion holes 21a of the attachment bolts 22 provided in the upper arm 21 are positioned with respect to each other. A mounting operation is performed in which the bolt 22 is inserted into the insertion holes 11a and 12a and the insertion hole 21a, and a mounting nut 23 is screwed and fastened to the distal end portion of the inserted mounting bolt 22.
[0004]
[Problems to be solved by the invention]
By the way, in the fastening means, the inner side surface of the upper arm 21 contacts the outer side surfaces of the side frame portions 11 and 12 of the seat back frame 10 in contact with each other, and the mounting bolts 22 are connected to the side frame portions 11 and 12. The inner peripheral surfaces of the insertion holes 11 a and 12 a are in contact with each other, and the inner side surfaces of the mounting nuts 23 are in contact with the inner side surfaces of the side frame portions 11 and 12. That is, the contact between the seat back frame 10 and each of the other members is a contact between different metal members, and a potential difference occurs between these different metal members, which may cause corrosion on the contact surfaces of these members. is there. If corrosion occurs on the contact surfaces of these members, the durability of the seat back frame 10 and the ratchet 21 is impaired, and the reliability of the product characteristics is impaired. The object of the present invention is therefore to address such problems.
[0005]
[Means for Solving the Problems]
Mounting structure for engagement Ru function material to the present invention, while polymerizing the functional member consisting of a metal material different from that of the light alloy to one side of the integral molded frame a light alloy as a molding material, at the coupling means according nut mounting the mounting bolt inserted through the insertion hole of the functional member and the frame member, a mounting structure of the functional members in structural parts formed by attaching the functional member to the frame member , the frame, said functional member, said mounting bolt and said mounting nut is a mounting structure of the functional member through the synthetic resin member is a non-contact state with each other.
[0006]
Thus, in the functional material mounting structure according to the present invention, the synthetic resin member is provided at one end of the cylindrical portion and the cylindrical portion through which the mounting bolt penetrates and is inserted into the insertion hole of the frame body. And a first member having a flange portion positioned on one side of the frame, and fitted between the first member and the tubular portion of the first member and interposed between the other side of the frame and the functional member A plate-like second member is employed, and the first member is a metal member whose outer periphery is coated with a synthetic resin film, and a screw is engraved on the inner periphery of the cylindrical portion However, the cylindrical portion functions as a mounting nut .
[0007]
[Operation and effect of the invention]
According to the functional material mounting structure of the present invention , a synthetic resin member is interposed between a frame made of a light alloy, a functional member made of a metal different from the frame, a mounting bolt, and a mounting nut. Therefore, there is no direct contact between these members, and no potential difference occurs between these dissimilar metal members, preventing the occurrence of corrosion on the contact surfaces of these members. can do. Therefore, the frame and the functional member do not lose their durability due to these potential differences, and do not lose the reliability of the characteristics of the product as a structural component.
[0008]
Thus, in the functional material mounting structure according to the present invention, the first member, which is a synthetic resin member, is a metal member whose outer periphery is coated with a synthetic resin film, and a screw is provided on the inner periphery of the cylindrical portion. By adopting the engraved member, the cylindrical portion of the first member functions as a mounting nut. For this reason, the cylinder part of the 1st member can be made to function similarly to the independent attachment nut which comprises a fastening means, and reduction of a number of parts and an assembly man-hour can be aimed at.
[0009]
[0010]
[0011]
[0012]
[0013]
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the drawings. FIG. 2 shows a seat back frame which is a structural component adopting an attachment structure to which the present invention is applied. The mounting structure adopted for the structural parts is that a frame made of light alloy, a functional member made of a metal different from the frame, a synthetic resin member interposed between the mounting bolt and mounting nut Is the basic structure. 2 shows, employing a seat back frame 10 is a frame body employed in the mounting structure, shows the upper arm 21 of the reclining mechanism is functioning member, FIG. 3, the mounting structure of the upper arm 21 And the attachment site | part currently attached to the seat back 10 is shown. The seat back frame 10 and the upper arm 21 are the same as the seat back frame 10 and the upper arm 21 shown in FIG. 1, and are integrated by a die casting method using a light alloy such as magnesium alloy or aluminum alloy having high ductility as a molding material. It is molded into. As the mold casting method, a thixomolding method or a die casting method in which a molding material that is a light alloy is injection molded in a semi-molten state is employed.
[0015]
The lower end portions of the left and right side frame portions 11 and 12 constituting the seat back frame 10 are attachment portions for attaching the upper arm 21, and insertion holes 11a and 12a of the attachment bolts 22 are formed in front and rear portions of the lower end portion. Has been. The upper arm 21 is formed with insertion holes 21a in the front and rear upper end projections of the arm body, and a ratchet 21b constituting a vehicle seat reclining mechanism is formed on the inner periphery of the central inner hole. Is formed. The upper arm 21 is attached by being fastened with a mounting bolt 22 and a mounting nut 23 in a state where the inner side surface is superposed on the lower outer side of the side frame 11, but the first shielding member 31 and the second shielding member are attached. 32 is attached.
[0016]
The first shielding member 31 and the second shielding member 32 are made of synthetic resin, and both the shielding members correspond to the synthetic resin members defined in the present invention . The first shielding member 31 is a bowl-shaped member in which two members, each formed of a cylindrical tube part 31a and a circular collar part 31b provided at one end thereof, are integrally formed at the side edges of the mutual collar parts 31b. it is those of. In the 1st shielding member 31, each cylinder part 31a is formed so that insertion to each insertion hole 11a of the side frame part 11 is carried out, and the insertion hole 31c facing each inner hole of each cylinder part 31a is formed in each collar part 31b. have.
[0017]
The second shielding member 32 is a bowl-shaped member in which circular plate portions 32a are integrally formed at their side edges, and each plate portion 32a is opposed to each insertion hole 11a of the side frame portion 11. An insertion hole 32b is formed.
[0018]
The left upper arm 21 is attached to the outer surface of the side frame portion 11 of the seat back frame 10 in the state shown in FIG. 3 via the first shielding member 31 and the second shielding member 32. The right upper arm 21 is symmetric with respect to the state shown in FIG. 3 with respect to the outer surface of the side frame portion 12 of the seat back frame 10 via the first shielding member 31 and the second shielding member 32. In the following, a structure for attaching the left upper arm 21 to the side frame portion 11 will be described, and a description of a structure for attaching the right upper arm 21 to the side frame portion 12 will be omitted.
[0019]
In order to attach the upper arm 21 to the outer surface of the side frame portion 11, first, each cylindrical portion 31a of the first shielding member 31 is inserted into each insertion hole 11a of the side frame portion 11, and each mounting bolt is attached to each cylindrical portion 31a. 22 or is inserted in a state of being inserted into the insertion holes 21a of the upper arm 21, while inserted into the cylindrical portion 31a of the insertion holes 21a and the first shielding member 31 of each mounting bolt 22 upper arm 21, first blocking Each cylindrical portion 31 a of the member 31 is inserted into each insertion hole 11 a of the side frame portion 11. Next, the second shielding member 32 is inserted over the distal end portion of each mounting bolt 22, and each mounting nut 23 is screwed and tightened to the distal end portion of each mounting bolt 22. Thus, the upper arm 21 is fastened and attached to the outer surface of the side frame portion 11 via the first shielding member 31 and the second shielding member 32.
[0020]
In the mounting structure, the upper arm 21 is shielded from the side frame portion 11 by the flange portion 31 b of the first shielding member 31 to prevent contact, and the mounting bolt 22 is secured by the cylindrical portion 31 b of the first shielding member 31. The attachment nut 23 is shielded by the plate portion 32a of the second shielding member 32 and is prevented from being contacted.
[0021]
Therefore, if the mounting structure is adopted, there is no direct contact between the seat back frame 10 made of a light alloy and the upper arm 21 made of a metal such as iron different from this, and a potential difference between these dissimilar metal members. Therefore, the occurrence of corrosion between the seat back frame 10 and the upper arm 21 due to the potential difference can be prevented. Therefore, the durability of the seat back frame 10 and the upper arm 21 is not impaired due to the potential difference, and the reliability of the characteristics of the product as a structural component is not impaired.
[0022]
[0023]
[0024]
FIG. 4 shows a functional member mounting structure according to the present invention. The attachment structure is an improvement of the attachment structure shown in FIG. 3, and is an attachment structure that eliminates the use of the attachment nut 23 constituting the attachment structure. In the mounting structure, the first shielding member 33 and the second shielding member 34 correspond to the first member and the second member defined in the present invention. In the mounting structure, the first shielding member 33 and the mounting bolt 24 are different from the first shielding member 32 and the mounting bolt 22 shown in FIG . The first shielding member 33 is made of metal whose outer periphery is coated with a synthetic resin film, and the cylindrical portion 33a functions as a nut by being engraved with a screw on its inner periphery. On the other hand, the mounting bolt 24 that is employed is such that the entire leg portion is formed as a threaded portion, and is configured to be screwed into the cylindrical portion 33 a of the first shielding member 33 .
[0025]
In the mounting structure, the first shielding member 33 is inserted into each insertion hole 11a from the inside of the side frame portion 11 through the cylindrical portion 33a , and the flange portion 33b is located on one side of the side frame 11, The 2nd shielding member 34 and the upper arm 21 are fitted on the front-end | tip part of each cylinder part 33a . In this state, each mounting bolt 24 is screwed from the upper arm 21 side to each cylindrical portion 33a of the first shielding member 33 through each insertion hole 21a, and penetrates each cylindrical portion 33a . Accordingly, the upper arm 21 is attached to the outer surface of the side frame portion 11 by the fastening action of the attachment bolt 24 and the first shielding member 33 .
[0026]
In the mounting structure, the upper arm 21 is shielded from the side frame portion 11 by the plate portion 34 a of the second shielding member 34 to prevent contact, and the mounting bolt 24 is connected to the cylindrical portion 33 a of the first shielding member 33 and the flange. The contact is blocked by the portion 33b . Therefore, in the mounting structure , the same effect as the mounting structure shown in FIG. 3 is obtained. In particular, the positioning of each component at the time of fastening by the mounting bolts 24 is easy, and the mounting nut 23 Use is unnecessary, and the number of parts and the number of mounting steps of the mounting structure can be reduced.
[0027]
[0028]
[0029]
[0030]
[0031]
[0032]
[0033]
[0034]
[0035]
[Brief description of the drawings]
FIG. 1 is a perspective view of a seat back frame and an upper arm for explaining a conventional mounting structure.
FIG. 2 is a perspective view of a seat back frame and an upper arm adopting an attachment structure to which the present invention is applied .
FIG. 3 is a longitudinal sectional view showing a mounting structure to which the present invention is applied .
FIG. 4 is a longitudinal sectional view showing a mounting structure according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Seat back frame, 11, 12 ... Side frame part, 11a, 12a ... Insertion hole, 21 ... Upper arm, 21a ... Insertion hole, 21b ... Ratchet, 22, 24 ... Mounting bolt, 23 ... Nut, 25a, 25b ... Upper arm , 31,3 3 ... first shielding member, 31a, 32a, 33a ... cylindrical portion, 31b, 32 b, 33b ... flange portion, 32,3 4 ... second shielding member.

Claims (1)

A functional member made of a metal material different from the light alloy is polymerized on one side of a frame body integrally molded with the light alloy as a molding material, and the functional member and the insertion hole of the frame body are inserted. at the coupling means according nut mounting the mounting bolt, a mounting structure of the functional members in structural parts formed by attaching the functional member to the frame member, the frame member, the functional member, said mounting bolt and a mounting structure of a functional member of said mounting nut is a non-contact state with each other via a synthetic resin member, as the synthetic resin member, inserted into the insertion hole of the frame body together with the mounting bolt passes through A first member having a cylindrical portion and a flange portion provided at one end of the cylindrical portion and positioned on one side surface of the frame, and the frame fitted onto the cylindrical portion of the first member Between the other side of the body and the functional member An existing plate-like second member is employed, and the first member is a metal member whose outer periphery is coated with a synthetic resin film, and a screw is engraved on the inner periphery of the cylindrical portion. A mounting structure for a functional member, wherein the cylindrical portion functions as a mounting nut .

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