JPH1053058A - See-through head rest and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leaving a burn mark or attachment of contaminant to a tucked-up cover when a reinforcing rib for a see-through head rest is to be welded. SOLUTION: A notch 20c is formed at the top of a rib 20 installed inside a cover 10 for the body 1 of a see-through head rest. A cylindrical part 11 which is shrunk is inserted in this notch 20c from an opening 12 provided in the cover 10, and the foaming molding process is conducted in the condition that the cylindrical part 11 is positioned between an aux. rib 20b welded to the rib 20 and the notch 20c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a see-through headrest attached to the upper end of a seat back of an automobile or the like, and more particularly to a method of manufacturing without damaging or covering a cover by welding a cross beam of aggregate in a manufacturing process. About.

[0002]

2. Description of the Related Art Manufacture of a see-through headrest which is attached to the upper end of a seat back of an automobile or the like to form a gap in the center of a main body in order to increase the air permeability of the head when used and to improve the visibility in the front-rear direction when not in use. The method is performed in the following procedure. First, a cylindrical portion formed in the void portion is provided at the center of the main body by bonding or fusing the outer material and the lining as a cover, and a cover having an opening at the lower end is formed. Next, a one-sided stay of the U-shaped aggregate is inserted through the opening of the cover, and is passed through the inside of the cover around the cylindrical portion so as to orbit again through the opening of the cover. And the two stays project from the opening of the cover. Then, after turning up the opening of the cover, fixing the auxiliary aggregate as a cross beam between the two stays by spot welding or the like, pouring a foaming material inside the cover so as to cover the aggregate, and forming the cover and the aggregate. Are integrally foamed to obtain a see-through headrest.

[0003]

However, in order to fix the auxiliary aggregate serving as the cross beam by spot welding or the like, burn marks and dirt may adhere to the rolled-up cover. Properly providing a protective member on the cover was troublesome.

[0004]

SUMMARY OF THE INVENTION Therefore, claim 1 of the present application is provided.
The described invention relates to a method of manufacturing a see-through headrest comprising a cover provided with a cylindrical portion forming a void portion in the center of the main body and an aggregate fixed in the cover by foam molding, wherein a cross beam is provided between the stays. A method of manufacturing a see-through headrest in which a notch is provided at an upper end of an aggregate to which an auxiliary aggregate is fixed, a cylindrical portion of the cover is inserted through the notch, and the aggregate is disposed in the cover. Thereby, after fixing the auxiliary aggregate as a cross beam between the stays of the aggregate by welding,
Since the cover can be attached, burn marks and stains of welding do not adhere to the cover. Here, the fixation of the aggregate is not limited to spot welding, but may be other various welding, or may use an engaging member such as a screw or a pin other than welding. . And
A see-through headrest according to claim 2 manufactured by the manufacturing method according to claim 1, a cover provided with a tubular portion forming a void in the center of the main body, and a portion where the auxiliary aggregate is fixedly connected as a cross beam and connected. An aggregate in which a notch is provided at the upper end and a stay is extended at the lower end, the aggregate is provided in the cover, and the cylindrical portion is located between the fixing portion of the auxiliary aggregate and the notch. This is a see-through headrest that is fixed by foam molding so that the stay is fixed to the upper end of the seatback, so that the head of the user can be sufficiently supported. Further, the shape of the aggregate may be any shape as long as it is a shape that reinforces the void portion of the main body. A see-through headrest having an aggregate formed and provided with a cutout at its upper end and a stay protruding downward from the square-shaped aggregate may be used. In particular, it is desirable that the stay of the aggregate is provided so as to be tiltable, the tilt of the headrest can be set according to the user's preference, and the fatigue of the neck muscles is reduced.

[0005]

FIG. 1 is a longitudinal sectional view taken along an aggregate of a see-through headrest according to the present invention. A see-through headrest main body 1 has a cover 10 and a stay 21 fixed to an upper end of a seat back. Aggregate 20 extended to
And a foam material 30 obtained by foaming and curing a foaming raw material. The cover 10 has a gap 2 located at the center of the main body 1.
And an opening 12 that is closed after the aggregate 20 is inserted and that allows the stay 21 to protrude downward. The aggregate 20 is formed by fixing two L-shaped vertical members 20a each having a stay 21 at a lower end thereof, and fixing and connecting an auxiliary aggregate 20b as a horizontal girder by spot welding. A notch 20c is formed. It should be noted that, in addition to using the L-shaped vertical member separated as described above, the middle of the conventional U-shaped aggregate is connected by horizontal beam welding with an auxiliary aggregate, and then the upper end is connected. It can also be cut to form a notch. The stay 21 of the headrest is used by being inserted into a stay mounting portion provided at the upper end of the seat back.

Next, a method of manufacturing the see-through headrest will be described. First, the cover 1 having the tubular portion 11 formed thereon
The aggregate 20 having the 0 and the notch 20c is prepared. Here, the auxiliary aggregate 20b is already fixed to the aggregate 20 by spot welding.
There is no need for a procedure for protecting 0 from contamination. next,
The notch 20 c of the aggregate 20 is provided with the opening 12 of the cover 10.
As shown in FIG. 2, the cylindrical portion 11, which has been slightly shrunken, is inserted into the auxiliary aggregate 20 in which the cylindrical portion 11 is welded to the aggregate 20.
b and the notch 20c. Then, the cover 10 was placed on the divided molding die while inserting the convex portion of the die into the cylindrical portion 11, and the aggregate 20 was held so as to be located near the center of the main body thickness after molding. Then, the divided molds are closed. Compressed air is blown into the closed mold to inflate the cover 10, and a predetermined amount of a foaming material such as urethane foam resin is poured from an injection nozzle to perform foam molding.
At this time, the opening 12 of the cover 10 is closed by the foaming pressure. Then, after a lapse of a predetermined time, the foamed raw material is hardened, cooled, and taken out of the mold. Aggregate 2
Even if the notch portion 20c is provided at the upper end of the zero, the gap between the notches is reinforced by foaming, and the stay 21 is fixed to the upper end of the seat back, so that the torsional strength is sufficiently dealt with.

As another embodiment, in the above embodiment, L
The vertical members in the shape of a letter are connected by auxiliary aggregates, and the stays are extended at the lower ends of the respective vertical members. However, the upper ends of the aggregates 20 formed in a substantially rectangular shape as shown in FIG. Notch 20c
May be provided, and two stays 21 and 21 protrude from the lower end. Further, if the stays 21 and 21 are provided so as to be tiltable by the connecting portions 20d and 20d, and the inclination of the headrest is set according to the user's preference, fatigue of the neck can be reduced. Further, at both ends of the aggregate forming the cutout portion, an engaging portion and a corresponding engaged portion are provided, respectively, and a gap between the engaging portion and the engaged portion is increased to form a cylindrical portion of the cover. After the insertion, it can be reengaged to further increase the strength of the aggregate after foam molding. Similarly, although not shown, after being provided with a long length so that both ends of the aggregate bent substantially in the shape of a rectangle are overlapped, and after inserting the cylindrical portion of the cover,
Both ends may be tied up with wires and fixed.

[0008]

As described above in detail, according to the first, second and third aspects of the present invention, when welding an aggregate, the tubular portion is welded as in the prior art. Since it is not necessary to turn up the inserted cover, a procedure for protecting the cover is not required, the manufacturing cost is reduced, and a product with no stain and no scorch on the cover can be provided.
According to the fourth aspect, in addition to the effects of the first to third aspects of the present invention, the inclination of the headrest can be set according to the user's preference, and fatigue of the neck can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a see-through headrest of the present invention.

FIG. 2 is an explanatory view in the middle of assembling the sheath headrest of FIG. 1;

FIG. 3 is a longitudinal sectional view showing another embodiment.

[Explanation of symbols]

1. body, 2. gap, 10 cover, 11.
Cylindrical part, 12 ... opening, 20 ... aggregate, 20a ... vertical, 20b ... auxiliary aggregate, 20c ... notch, 20d
..Connecting part, 21..stay, 30..foam material.

Claims (4)

[Claims] 1. A method for manufacturing a see-through headrest comprising a cover provided with a cylindrical portion forming a void portion in the center of a main body and an aggregate fixed in the cover by foam molding, wherein a cross beam is provided between stays. A cut-out portion is provided at the upper end of the aggregate to which the auxiliary aggregate is fixed, the tubular portion of the cover is inserted through the notch portion, and the aggregate is disposed in the cover. Production method. 2. A cover provided with a tubular portion forming a void in the center of the main body, a notch at the upper end from a portion where the auxiliary aggregate is fixed and connected as a cross beam, and a stay is extended at the lower end. A see-through headrest, comprising: an aggregate; and fixing the aggregate in the cover by foam molding such that the cylindrical portion is located between the fixing portion of the auxiliary aggregate and the notch. . 3. A cover provided with a cylindrical portion forming a void at the center of the main body, an aggregate formed substantially in a U shape and provided with a notch at an upper end, and a downward facing to the U shape aggregate. A see-through headrest, comprising: a stay protruding from the cover; and fixing the aggregate in the cover by foam molding such that the cylindrical portion is located inside the square-shaped aggregate. 4. The see-through headrest according to claim 2, wherein the stay is tiltably provided on the aggregate.